diff --git a/fs/afs/Makefile b/fs/afs/Makefile index 10359be..75c4e40 100644 --- a/fs/afs/Makefile +++ b/fs/afs/Makefile @@ -18,6 +18,7 @@ kafs-y := \ file.o \ flock.o \ fsclient.o \ + fs_operation.o \ fs_probe.o \ inode.o \ main.o \ @@ -30,6 +31,7 @@ kafs-y := \ server_list.o \ super.o \ vlclient.o \ + vl_alias.o \ vl_list.o \ vl_probe.o \ vl_rotate.o \ diff --git a/fs/afs/afs.h b/fs/afs/afs.h index b6d49d6..432cb4b 100644 --- a/fs/afs/afs.h +++ b/fs/afs/afs.h @@ -10,7 +10,7 @@ #include -#define AFS_MAXCELLNAME 64 /* Maximum length of a cell name */ +#define AFS_MAXCELLNAME 256 /* Maximum length of a cell name */ #define AFS_MAXVOLNAME 64 /* Maximum length of a volume name */ #define AFS_MAXNSERVERS 8 /* Maximum servers in a basic volume record */ #define AFS_NMAXNSERVERS 13 /* Maximum servers in a N/U-class volume record */ @@ -146,7 +146,6 @@ struct afs_file_status { struct afs_status_cb { struct afs_file_status status; struct afs_callback callback; - unsigned int cb_break; /* Pre-op callback break counter */ bool have_status; /* True if status record was retrieved */ bool have_cb; /* True if cb record was retrieved */ bool have_error; /* True if status.abort_code indicates an error */ diff --git a/fs/afs/afs_vl.h b/fs/afs/afs_vl.h index e9b8029..9c65ffb 100644 --- a/fs/afs/afs_vl.h +++ b/fs/afs/afs_vl.h @@ -22,6 +22,7 @@ enum AFSVL_Operations { VLGETENTRYBYNAMEU = 527, /* AFS Get VLDB entry by name (UUID-variant) */ VLGETADDRSU = 533, /* AFS Get addrs for fileserver */ YVLGETENDPOINTS = 64002, /* YFS Get endpoints for file/volume server */ + YVLGETCELLNAME = 64014, /* YFS Get actual cell name */ VLGETCAPABILITIES = 65537, /* AFS Get server capabilities */ }; diff --git a/fs/afs/callback.c b/fs/afs/callback.c index 2dca8df..7d9b23d 100644 --- a/fs/afs/callback.c +++ b/fs/afs/callback.c @@ -21,192 +21,17 @@ #include "internal.h" /* - * Create volume and callback interests on a server. - */ -static struct afs_cb_interest *afs_create_interest(struct afs_server *server, - struct afs_vnode *vnode) -{ - struct afs_vol_interest *new_vi, *vi; - struct afs_cb_interest *new; - struct hlist_node **pp; - - new_vi = kzalloc(sizeof(struct afs_vol_interest), GFP_KERNEL); - if (!new_vi) - return NULL; - - new = kzalloc(sizeof(struct afs_cb_interest), GFP_KERNEL); - if (!new) { - kfree(new_vi); - return NULL; - } - - new_vi->usage = 1; - new_vi->vid = vnode->volume->vid; - INIT_HLIST_NODE(&new_vi->srv_link); - INIT_HLIST_HEAD(&new_vi->cb_interests); - - refcount_set(&new->usage, 1); - new->sb = vnode->vfs_inode.i_sb; - new->vid = vnode->volume->vid; - new->server = afs_get_server(server, afs_server_trace_get_new_cbi); - INIT_HLIST_NODE(&new->cb_vlink); - - write_lock(&server->cb_break_lock); - - for (pp = &server->cb_volumes.first; *pp; pp = &(*pp)->next) { - vi = hlist_entry(*pp, struct afs_vol_interest, srv_link); - if (vi->vid < new_vi->vid) - continue; - if (vi->vid > new_vi->vid) - break; - vi->usage++; - goto found_vi; - } - - new_vi->srv_link.pprev = pp; - new_vi->srv_link.next = *pp; - if (*pp) - (*pp)->pprev = &new_vi->srv_link.next; - *pp = &new_vi->srv_link; - vi = new_vi; - new_vi = NULL; -found_vi: - - new->vol_interest = vi; - hlist_add_head(&new->cb_vlink, &vi->cb_interests); - - write_unlock(&server->cb_break_lock); - kfree(new_vi); - return new; -} - -/* - * Set up an interest-in-callbacks record for a volume on a server and - * register it with the server. - * - Called with vnode->io_lock held. - */ -int afs_register_server_cb_interest(struct afs_vnode *vnode, - struct afs_server_list *slist, - unsigned int index) -{ - struct afs_server_entry *entry = &slist->servers[index]; - struct afs_cb_interest *cbi, *vcbi, *new, *old; - struct afs_server *server = entry->server; - -again: - vcbi = rcu_dereference_protected(vnode->cb_interest, - lockdep_is_held(&vnode->io_lock)); - if (vcbi && likely(vcbi == entry->cb_interest)) - return 0; - - read_lock(&slist->lock); - cbi = afs_get_cb_interest(entry->cb_interest); - read_unlock(&slist->lock); - - if (vcbi) { - if (vcbi == cbi) { - afs_put_cb_interest(afs_v2net(vnode), cbi); - return 0; - } - - /* Use a new interest in the server list for the same server - * rather than an old one that's still attached to a vnode. - */ - if (cbi && vcbi->server == cbi->server) { - write_seqlock(&vnode->cb_lock); - old = rcu_dereference_protected(vnode->cb_interest, - lockdep_is_held(&vnode->cb_lock.lock)); - rcu_assign_pointer(vnode->cb_interest, cbi); - write_sequnlock(&vnode->cb_lock); - afs_put_cb_interest(afs_v2net(vnode), old); - return 0; - } - - /* Re-use the one attached to the vnode. */ - if (!cbi && vcbi->server == server) { - write_lock(&slist->lock); - if (entry->cb_interest) { - write_unlock(&slist->lock); - afs_put_cb_interest(afs_v2net(vnode), cbi); - goto again; - } - - entry->cb_interest = cbi; - write_unlock(&slist->lock); - return 0; - } - } - - if (!cbi) { - new = afs_create_interest(server, vnode); - if (!new) - return -ENOMEM; - - write_lock(&slist->lock); - if (!entry->cb_interest) { - entry->cb_interest = afs_get_cb_interest(new); - cbi = new; - new = NULL; - } else { - cbi = afs_get_cb_interest(entry->cb_interest); - } - write_unlock(&slist->lock); - afs_put_cb_interest(afs_v2net(vnode), new); - } - - ASSERT(cbi); - - /* Change the server the vnode is using. This entails scrubbing any - * interest the vnode had in the previous server it was using. - */ - write_seqlock(&vnode->cb_lock); - - old = rcu_dereference_protected(vnode->cb_interest, - lockdep_is_held(&vnode->cb_lock.lock)); - rcu_assign_pointer(vnode->cb_interest, cbi); - vnode->cb_s_break = cbi->server->cb_s_break; - vnode->cb_v_break = vnode->volume->cb_v_break; - clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); - - write_sequnlock(&vnode->cb_lock); - afs_put_cb_interest(afs_v2net(vnode), old); - return 0; -} - -/* - * Remove an interest on a server. - */ -void afs_put_cb_interest(struct afs_net *net, struct afs_cb_interest *cbi) -{ - struct afs_vol_interest *vi; - - if (cbi && refcount_dec_and_test(&cbi->usage)) { - if (!hlist_unhashed(&cbi->cb_vlink)) { - write_lock(&cbi->server->cb_break_lock); - - hlist_del_init(&cbi->cb_vlink); - vi = cbi->vol_interest; - cbi->vol_interest = NULL; - if (--vi->usage == 0) - hlist_del(&vi->srv_link); - else - vi = NULL; - - write_unlock(&cbi->server->cb_break_lock); - if (vi) - kfree_rcu(vi, rcu); - afs_put_server(net, cbi->server, afs_server_trace_put_cbi); - } - kfree_rcu(cbi, rcu); - } -} - -/* - * allow the fileserver to request callback state (re-)initialisation + * Allow the fileserver to request callback state (re-)initialisation. + * Unfortunately, UUIDs are not guaranteed unique. */ void afs_init_callback_state(struct afs_server *server) { - server->cb_s_break++; + rcu_read_lock(); + do { + server->cb_s_break++; + server = rcu_dereference(server->uuid_next); + } while (0); + rcu_read_unlock(); } /* @@ -238,69 +63,109 @@ void afs_break_callback(struct afs_vnode *vnode, enum afs_cb_break_reason reason } /* + * Look up a volume by volume ID under RCU conditions. + */ +static struct afs_volume *afs_lookup_volume_rcu(struct afs_cell *cell, + afs_volid_t vid) +{ + struct afs_volume *volume = NULL; + struct rb_node *p; + int seq = 0; + + do { + /* Unfortunately, rbtree walking doesn't give reliable results + * under just the RCU read lock, so we have to check for + * changes. + */ + read_seqbegin_or_lock(&cell->volume_lock, &seq); + + p = rcu_dereference_raw(cell->volumes.rb_node); + while (p) { + volume = rb_entry(p, struct afs_volume, cell_node); + + if (volume->vid < vid) + p = rcu_dereference_raw(p->rb_left); + else if (volume->vid > vid) + p = rcu_dereference_raw(p->rb_right); + else + break; + volume = NULL; + } + + } while (need_seqretry(&cell->volume_lock, seq)); + + done_seqretry(&cell->volume_lock, seq); + return volume; +} + +/* * allow the fileserver to explicitly break one callback * - happens when * - the backing file is changed * - a lock is released */ -static void afs_break_one_callback(struct afs_server *server, +static void afs_break_one_callback(struct afs_volume *volume, struct afs_fid *fid) { - struct afs_vol_interest *vi; - struct afs_cb_interest *cbi; - struct afs_iget_data data; + struct super_block *sb; struct afs_vnode *vnode; struct inode *inode; - read_lock(&server->cb_break_lock); - hlist_for_each_entry(vi, &server->cb_volumes, srv_link) { - if (vi->vid < fid->vid) - continue; - if (vi->vid > fid->vid) { - vi = NULL; - break; - } - //atomic_inc(&vi->usage); - break; + if (fid->vnode == 0 && fid->unique == 0) { + /* The callback break applies to an entire volume. */ + write_lock(&volume->cb_v_break_lock); + volume->cb_v_break++; + trace_afs_cb_break(fid, volume->cb_v_break, + afs_cb_break_for_volume_callback, false); + write_unlock(&volume->cb_v_break_lock); + return; } - /* TODO: Find all matching volumes if we couldn't match the server and - * break them anyway. + /* See if we can find a matching inode - even an I_NEW inode needs to + * be marked as it can have its callback broken before we finish + * setting up the local inode. */ - if (!vi) - goto out; + sb = rcu_dereference(volume->sb); + if (!sb) + return; + + inode = find_inode_rcu(sb, fid->vnode, afs_ilookup5_test_by_fid, fid); + if (inode) { + vnode = AFS_FS_I(inode); + afs_break_callback(vnode, afs_cb_break_for_callback); + } else { + trace_afs_cb_miss(fid, afs_cb_break_for_callback); + } +} + +static void afs_break_some_callbacks(struct afs_server *server, + struct afs_callback_break *cbb, + size_t *_count) +{ + struct afs_callback_break *residue = cbb; + struct afs_volume *volume; + afs_volid_t vid = cbb->fid.vid; + size_t i; - /* Step through all interested superblocks. There may be more than one - * because of cell aliasing. + volume = afs_lookup_volume_rcu(server->cell, vid); + + /* TODO: Find all matching volumes if we couldn't match the server and + * break them anyway. */ - hlist_for_each_entry(cbi, &vi->cb_interests, cb_vlink) { - if (fid->vnode == 0 && fid->unique == 0) { - /* The callback break applies to an entire volume. */ - struct afs_super_info *as = AFS_FS_S(cbi->sb); - struct afs_volume *volume = as->volume; - write_lock(&volume->cb_v_break_lock); - volume->cb_v_break++; - trace_afs_cb_break(fid, volume->cb_v_break, - afs_cb_break_for_volume_callback, false); - write_unlock(&volume->cb_v_break_lock); + for (i = *_count; i > 0; cbb++, i--) { + if (cbb->fid.vid == vid) { + _debug("- Fid { vl=%08llx n=%llu u=%u }", + cbb->fid.vid, + cbb->fid.vnode, + cbb->fid.unique); + --*_count; + if (volume) + afs_break_one_callback(volume, &cbb->fid); } else { - data.volume = NULL; - data.fid = *fid; - inode = ilookup5_nowait(cbi->sb, fid->vnode, - afs_iget5_test, &data); - if (inode) { - vnode = AFS_FS_I(inode); - afs_break_callback(vnode, afs_cb_break_for_callback); - iput(inode); - } else { - trace_afs_cb_miss(fid, afs_cb_break_for_callback); - } + *residue++ = *cbb; } } - -out: - read_unlock(&server->cb_break_lock); } /* @@ -313,29 +178,11 @@ void afs_break_callbacks(struct afs_server *server, size_t count, ASSERT(server != NULL); - /* TODO: Sort the callback break list by volume ID */ + rcu_read_lock(); - for (; count > 0; callbacks++, count--) { - _debug("- Fid { vl=%08llx n=%llu u=%u }", - callbacks->fid.vid, - callbacks->fid.vnode, - callbacks->fid.unique); - afs_break_one_callback(server, &callbacks->fid); - } + while (count > 0) + afs_break_some_callbacks(server, callbacks, &count); - _leave(""); + rcu_read_unlock(); return; } - -/* - * Clear the callback interests in a server list. - */ -void afs_clear_callback_interests(struct afs_net *net, struct afs_server_list *slist) -{ - int i; - - for (i = 0; i < slist->nr_servers; i++) { - afs_put_cb_interest(net, slist->servers[i].cb_interest); - slist->servers[i].cb_interest = NULL; - } -} diff --git a/fs/afs/cell.c b/fs/afs/cell.c index 78ba5f9..005921e 100644 --- a/fs/afs/cell.c +++ b/fs/afs/cell.c @@ -161,9 +161,13 @@ static struct afs_cell *afs_alloc_cell(struct afs_net *net, atomic_set(&cell->usage, 2); INIT_WORK(&cell->manager, afs_manage_cell); - INIT_LIST_HEAD(&cell->proc_volumes); - rwlock_init(&cell->proc_lock); + cell->volumes = RB_ROOT; + INIT_HLIST_HEAD(&cell->proc_volumes); + seqlock_init(&cell->volume_lock); + cell->fs_servers = RB_ROOT; + seqlock_init(&cell->fs_lock); rwlock_init(&cell->vl_servers_lock); + cell->flags = (1 << AFS_CELL_FL_CHECK_ALIAS); /* Provide a VL server list, filling it in if we were given a list of * addresses to use. @@ -481,7 +485,9 @@ static void afs_cell_destroy(struct rcu_head *rcu) ASSERTCMP(atomic_read(&cell->usage), ==, 0); + afs_put_volume(cell->net, cell->root_volume, afs_volume_trace_put_cell_root); afs_put_vlserverlist(cell->net, rcu_access_pointer(cell->vl_servers)); + afs_put_cell(cell->net, cell->alias_of); key_put(cell->anonymous_key); kfree(cell); diff --git a/fs/afs/cmservice.c b/fs/afs/cmservice.c index 380ad5a..bef4138 100644 --- a/fs/afs/cmservice.c +++ b/fs/afs/cmservice.c @@ -118,8 +118,6 @@ bool afs_cm_incoming_call(struct afs_call *call) { _enter("{%u, CB.OP %u}", call->service_id, call->operation_ID); - call->epoch = rxrpc_kernel_get_epoch(call->net->socket, call->rxcall); - switch (call->operation_ID) { case CBCallBack: call->type = &afs_SRXCBCallBack; @@ -150,49 +148,6 @@ bool afs_cm_incoming_call(struct afs_call *call) } /* - * Record a probe to the cache manager from a server. - */ -static int afs_record_cm_probe(struct afs_call *call, struct afs_server *server) -{ - _enter(""); - - if (test_bit(AFS_SERVER_FL_HAVE_EPOCH, &server->flags) && - !test_bit(AFS_SERVER_FL_PROBING, &server->flags)) { - if (server->cm_epoch == call->epoch) - return 0; - - if (!server->probe.said_rebooted) { - pr_notice("kAFS: FS rebooted %pU\n", &server->uuid); - server->probe.said_rebooted = true; - } - } - - spin_lock(&server->probe_lock); - - if (!test_and_set_bit(AFS_SERVER_FL_HAVE_EPOCH, &server->flags)) { - server->cm_epoch = call->epoch; - server->probe.cm_epoch = call->epoch; - goto out; - } - - if (server->probe.cm_probed && - call->epoch != server->probe.cm_epoch && - !server->probe.said_inconsistent) { - pr_notice("kAFS: FS endpoints inconsistent %pU\n", - &server->uuid); - server->probe.said_inconsistent = true; - } - - if (!server->probe.cm_probed || call->epoch == server->cm_epoch) - server->probe.cm_epoch = server->cm_epoch; - -out: - server->probe.cm_probed = true; - spin_unlock(&server->probe_lock); - return 0; -} - -/* * Find the server record by peer address and record a probe to the cache * manager from a server. */ @@ -210,7 +165,7 @@ static int afs_find_cm_server_by_peer(struct afs_call *call) } call->server = server; - return afs_record_cm_probe(call, server); + return 0; } /* @@ -231,7 +186,7 @@ static int afs_find_cm_server_by_uuid(struct afs_call *call, } call->server = server; - return afs_record_cm_probe(call, server); + return 0; } /* @@ -268,7 +223,9 @@ static void SRXAFSCB_CallBack(struct work_struct *work) * to maintain cache coherency. */ if (call->server) { - trace_afs_server(call->server, atomic_read(&call->server->usage), + trace_afs_server(call->server, + atomic_read(&call->server->ref), + atomic_read(&call->server->active), afs_server_trace_callback); afs_break_callbacks(call->server, call->count, call->request); } @@ -305,8 +262,7 @@ static int afs_deliver_cb_callback(struct afs_call *call) call->count = ntohl(call->tmp); _debug("FID count: %u", call->count); if (call->count > AFSCBMAX) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_cb_fid_count); + return afs_protocol_error(call, afs_eproto_cb_fid_count); call->buffer = kmalloc(array3_size(call->count, 3, 4), GFP_KERNEL); @@ -351,8 +307,7 @@ static int afs_deliver_cb_callback(struct afs_call *call) call->count2 = ntohl(call->tmp); _debug("CB count: %u", call->count2); if (call->count2 != call->count && call->count2 != 0) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_cb_count); + return afs_protocol_error(call, afs_eproto_cb_count); call->iter = &call->def_iter; iov_iter_discard(&call->def_iter, READ, call->count2 * 3 * 4); call->unmarshall++; @@ -509,7 +464,8 @@ static int afs_deliver_cb_probe(struct afs_call *call) } /* - * allow the fileserver to quickly find out if the fileserver has been rebooted + * Allow the fileserver to quickly find out if the cache manager has been + * rebooted. */ static void SRXAFSCB_ProbeUuid(struct work_struct *work) { @@ -581,7 +537,7 @@ static int afs_deliver_cb_probe_uuid(struct afs_call *call) if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING)) return afs_io_error(call, afs_io_error_cm_reply); - return afs_find_cm_server_by_uuid(call, call->request); + return afs_find_cm_server_by_peer(call); } /* @@ -672,8 +628,7 @@ static int afs_deliver_yfs_cb_callback(struct afs_call *call) call->count = ntohl(call->tmp); _debug("FID count: %u", call->count); if (call->count > YFSCBMAX) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_cb_fid_count); + return afs_protocol_error(call, afs_eproto_cb_fid_count); size = array_size(call->count, sizeof(struct yfs_xdr_YFSFid)); call->buffer = kmalloc(size, GFP_KERNEL); diff --git a/fs/afs/dir.c b/fs/afs/dir.c index d1e1caa..25cbe0a 100644 --- a/fs/afs/dir.c +++ b/fs/afs/dir.c @@ -99,8 +99,6 @@ struct afs_lookup_cookie { bool found; bool one_only; unsigned short nr_fids; - struct inode **inodes; - struct afs_status_cb *statuses; struct afs_fid fids[50]; }; @@ -618,8 +616,8 @@ static int afs_lookup_filldir(struct dir_context *ctx, const char *name, } } else if (cookie->name.len == nlen && memcmp(cookie->name.name, name, nlen) == 0) { - cookie->fids[0].vnode = ino; - cookie->fids[0].unique = dtype; + cookie->fids[1].vnode = ino; + cookie->fids[1].unique = dtype; cookie->found = 1; if (cookie->one_only) return -1; @@ -631,6 +629,111 @@ static int afs_lookup_filldir(struct dir_context *ctx, const char *name, } /* + * Deal with the result of a successful lookup operation. Turn all the files + * into inodes and save the first one - which is the one we actually want. + */ +static void afs_do_lookup_success(struct afs_operation *op) +{ + struct afs_vnode_param *vp; + struct afs_vnode *vnode; + struct inode *inode; + u32 abort_code; + int i; + + _enter(""); + + for (i = 0; i < op->nr_files; i++) { + switch (i) { + case 0: + vp = &op->file[0]; + abort_code = vp->scb.status.abort_code; + if (abort_code != 0) { + op->abort_code = abort_code; + op->error = afs_abort_to_error(abort_code); + } + break; + + case 1: + vp = &op->file[1]; + break; + + default: + vp = &op->more_files[i - 2]; + break; + } + + if (!vp->scb.have_status && !vp->scb.have_error) + continue; + + _debug("do [%u]", i); + if (vp->vnode) { + if (!test_bit(AFS_VNODE_UNSET, &vp->vnode->flags)) + afs_vnode_commit_status(op, vp); + } else if (vp->scb.status.abort_code == 0) { + inode = afs_iget(op, vp); + if (!IS_ERR(inode)) { + vnode = AFS_FS_I(inode); + afs_cache_permit(vnode, op->key, + 0 /* Assume vnode->cb_break is 0 */ + + op->cb_v_break, + &vp->scb); + vp->vnode = vnode; + vp->put_vnode = true; + } + } else { + _debug("- abort %d %llx:%llx.%x", + vp->scb.status.abort_code, + vp->fid.vid, vp->fid.vnode, vp->fid.unique); + } + } + + _leave(""); +} + +static const struct afs_operation_ops afs_inline_bulk_status_operation = { + .issue_afs_rpc = afs_fs_inline_bulk_status, + .issue_yfs_rpc = yfs_fs_inline_bulk_status, + .success = afs_do_lookup_success, +}; + +static const struct afs_operation_ops afs_fetch_status_operation = { + .issue_afs_rpc = afs_fs_fetch_status, + .issue_yfs_rpc = yfs_fs_fetch_status, + .success = afs_do_lookup_success, +}; + +/* + * See if we know that the server we expect to use doesn't support + * FS.InlineBulkStatus. + */ +static bool afs_server_supports_ibulk(struct afs_vnode *dvnode) +{ + struct afs_server_list *slist; + struct afs_volume *volume = dvnode->volume; + struct afs_server *server; + bool ret = true; + int i; + + if (!test_bit(AFS_VOLUME_MAYBE_NO_IBULK, &volume->flags)) + return true; + + rcu_read_lock(); + slist = rcu_dereference(volume->servers); + + for (i = 0; i < slist->nr_servers; i++) { + server = slist->servers[i].server; + if (server == dvnode->cb_server) { + if (test_bit(AFS_SERVER_FL_NO_IBULK, &server->flags)) + ret = false; + break; + } + } + + rcu_read_unlock(); + return ret; +} + +/* * Do a lookup in a directory. We make use of bulk lookup to query a slew of * files in one go and create inodes for them. The inode of the file we were * asked for is returned. @@ -639,16 +742,13 @@ static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry, struct key *key) { struct afs_lookup_cookie *cookie; - struct afs_cb_interest *dcbi, *cbi = NULL; - struct afs_super_info *as = dir->i_sb->s_fs_info; - struct afs_status_cb *scb; - struct afs_iget_data iget_data; - struct afs_fs_cursor fc; - struct afs_server *server; + struct afs_vnode_param *vp; + struct afs_operation *op; struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode; struct inode *inode = NULL, *ti; afs_dataversion_t data_version = READ_ONCE(dvnode->status.data_version); - int ret, i; + long ret; + int i; _enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry); @@ -656,72 +756,74 @@ static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry, if (!cookie) return ERR_PTR(-ENOMEM); + for (i = 0; i < ARRAY_SIZE(cookie->fids); i++) + cookie->fids[i].vid = dvnode->fid.vid; cookie->ctx.actor = afs_lookup_filldir; cookie->name = dentry->d_name; - cookie->nr_fids = 1; /* slot 0 is saved for the fid we actually want */ - - read_seqlock_excl(&dvnode->cb_lock); - dcbi = rcu_dereference_protected(dvnode->cb_interest, - lockdep_is_held(&dvnode->cb_lock.lock)); - if (dcbi) { - server = dcbi->server; - if (server && - test_bit(AFS_SERVER_FL_NO_IBULK, &server->flags)) - cookie->one_only = true; - } - read_sequnlock_excl(&dvnode->cb_lock); + cookie->nr_fids = 2; /* slot 0 is saved for the fid we actually want + * and slot 1 for the directory */ - for (i = 0; i < 50; i++) - cookie->fids[i].vid = as->volume->vid; + if (!afs_server_supports_ibulk(dvnode)) + cookie->one_only = true; /* search the directory */ ret = afs_dir_iterate(dir, &cookie->ctx, key, &data_version); - if (ret < 0) { - inode = ERR_PTR(ret); + if (ret < 0) goto out; - } dentry->d_fsdata = (void *)(unsigned long)data_version; - inode = ERR_PTR(-ENOENT); + ret = -ENOENT; if (!cookie->found) goto out; /* Check to see if we already have an inode for the primary fid. */ - iget_data.fid = cookie->fids[0]; - iget_data.volume = dvnode->volume; - iget_data.cb_v_break = dvnode->volume->cb_v_break; - iget_data.cb_s_break = 0; - inode = ilookup5(dir->i_sb, cookie->fids[0].vnode, - afs_iget5_test, &iget_data); + inode = ilookup5(dir->i_sb, cookie->fids[1].vnode, + afs_ilookup5_test_by_fid, &cookie->fids[1]); if (inode) - goto out; + goto out; /* We do */ - /* Need space for examining all the selected files */ - inode = ERR_PTR(-ENOMEM); - cookie->statuses = kvcalloc(cookie->nr_fids, sizeof(struct afs_status_cb), - GFP_KERNEL); - if (!cookie->statuses) + /* Okay, we didn't find it. We need to query the server - and whilst + * we're doing that, we're going to attempt to look up a bunch of other + * vnodes also. + */ + op = afs_alloc_operation(NULL, dvnode->volume); + if (IS_ERR(op)) { + ret = PTR_ERR(op); goto out; + } - cookie->inodes = kcalloc(cookie->nr_fids, sizeof(struct inode *), - GFP_KERNEL); - if (!cookie->inodes) - goto out_s; + afs_op_set_vnode(op, 0, dvnode); + afs_op_set_fid(op, 1, &cookie->fids[1]); - for (i = 1; i < cookie->nr_fids; i++) { - scb = &cookie->statuses[i]; + op->nr_files = cookie->nr_fids; + _debug("nr_files %u", op->nr_files); - /* Find any inodes that already exist and get their - * callback counters. - */ - iget_data.fid = cookie->fids[i]; - ti = ilookup5_nowait(dir->i_sb, iget_data.fid.vnode, - afs_iget5_test, &iget_data); - if (!IS_ERR_OR_NULL(ti)) { - vnode = AFS_FS_I(ti); - scb->cb_break = afs_calc_vnode_cb_break(vnode); - cookie->inodes[i] = ti; + /* Need space for examining all the selected files */ + op->error = -ENOMEM; + if (op->nr_files > 2) { + op->more_files = kvcalloc(op->nr_files - 2, + sizeof(struct afs_vnode_param), + GFP_KERNEL); + if (!op->more_files) + goto out_op; + + for (i = 2; i < op->nr_files; i++) { + vp = &op->more_files[i - 2]; + vp->fid = cookie->fids[i]; + + /* Find any inodes that already exist and get their + * callback counters. + */ + ti = ilookup5_nowait(dir->i_sb, vp->fid.vnode, + afs_ilookup5_test_by_fid, &vp->fid); + if (!IS_ERR_OR_NULL(ti)) { + vnode = AFS_FS_I(ti); + vp->dv_before = vnode->status.data_version; + vp->cb_break_before = afs_calc_vnode_cb_break(vnode); + vp->vnode = vnode; + vp->put_vnode = true; + } } } @@ -729,120 +831,40 @@ static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry, * lookups contained therein are stored in the reply without aborting * the whole operation. */ - if (cookie->one_only) - goto no_inline_bulk_status; - - inode = ERR_PTR(-ERESTARTSYS); - if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { - while (afs_select_fileserver(&fc)) { - if (test_bit(AFS_SERVER_FL_NO_IBULK, - &fc.cbi->server->flags)) { - fc.ac.abort_code = RX_INVALID_OPERATION; - fc.ac.error = -ECONNABORTED; - break; - } - iget_data.cb_v_break = dvnode->volume->cb_v_break; - iget_data.cb_s_break = fc.cbi->server->cb_s_break; - afs_fs_inline_bulk_status(&fc, - afs_v2net(dvnode), - cookie->fids, - cookie->statuses, - cookie->nr_fids, NULL); - } - - if (fc.ac.error == 0) - cbi = afs_get_cb_interest(fc.cbi); - if (fc.ac.abort_code == RX_INVALID_OPERATION) - set_bit(AFS_SERVER_FL_NO_IBULK, &fc.cbi->server->flags); - inode = ERR_PTR(afs_end_vnode_operation(&fc)); + op->error = -ENOTSUPP; + if (!cookie->one_only) { + op->ops = &afs_inline_bulk_status_operation; + afs_begin_vnode_operation(op); + afs_wait_for_operation(op); } - if (!IS_ERR(inode)) - goto success; - if (fc.ac.abort_code != RX_INVALID_OPERATION) - goto out_c; - -no_inline_bulk_status: - /* We could try FS.BulkStatus next, but this aborts the entire op if - * any of the lookups fails - so, for the moment, revert to - * FS.FetchStatus for just the primary fid. - */ - inode = ERR_PTR(-ERESTARTSYS); - if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { - while (afs_select_fileserver(&fc)) { - iget_data.cb_v_break = dvnode->volume->cb_v_break; - iget_data.cb_s_break = fc.cbi->server->cb_s_break; - scb = &cookie->statuses[0]; - afs_fs_fetch_status(&fc, - afs_v2net(dvnode), - cookie->fids, - scb, - NULL); - } - - if (fc.ac.error == 0) - cbi = afs_get_cb_interest(fc.cbi); - inode = ERR_PTR(afs_end_vnode_operation(&fc)); + if (op->error == -ENOTSUPP) { + /* We could try FS.BulkStatus next, but this aborts the entire + * op if any of the lookups fails - so, for the moment, revert + * to FS.FetchStatus for op->file[1]. + */ + op->fetch_status.which = 1; + op->ops = &afs_fetch_status_operation; + afs_begin_vnode_operation(op); + afs_wait_for_operation(op); } + inode = ERR_PTR(op->error); - if (IS_ERR(inode)) - goto out_c; - -success: - /* Turn all the files into inodes and save the first one - which is the - * one we actually want. - */ - scb = &cookie->statuses[0]; - if (scb->status.abort_code != 0) - inode = ERR_PTR(afs_abort_to_error(scb->status.abort_code)); - - for (i = 0; i < cookie->nr_fids; i++) { - struct afs_status_cb *scb = &cookie->statuses[i]; - - if (!scb->have_status && !scb->have_error) - continue; - - if (cookie->inodes[i]) { - struct afs_vnode *iv = AFS_FS_I(cookie->inodes[i]); - - if (test_bit(AFS_VNODE_UNSET, &iv->flags)) - continue; - - afs_vnode_commit_status(&fc, iv, - scb->cb_break, NULL, scb); - continue; - } - - if (scb->status.abort_code != 0) - continue; - - iget_data.fid = cookie->fids[i]; - ti = afs_iget(dir->i_sb, key, &iget_data, scb, cbi, dvnode); - if (!IS_ERR(ti)) - afs_cache_permit(AFS_FS_I(ti), key, - 0 /* Assume vnode->cb_break is 0 */ + - iget_data.cb_v_break, - scb); - if (i == 0) { - inode = ti; - } else { - if (!IS_ERR(ti)) - iput(ti); - } +out_op: + if (op->error == 0) { + inode = &op->file[1].vnode->vfs_inode; + op->file[1].vnode = NULL; } -out_c: - afs_put_cb_interest(afs_v2net(dvnode), cbi); - if (cookie->inodes) { - for (i = 0; i < cookie->nr_fids; i++) - iput(cookie->inodes[i]); - kfree(cookie->inodes); - } -out_s: - kvfree(cookie->statuses); + if (op->file[0].scb.have_status) + dentry->d_fsdata = (void *)(unsigned long)op->file[0].scb.status.data_version; + else + dentry->d_fsdata = (void *)(unsigned long)op->file[0].dv_before; + ret = afs_put_operation(op); out: kfree(cookie); - return inode; + _leave(""); + return inode ?: ERR_PTR(ret); } /* @@ -958,6 +980,7 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, if (!IS_ERR_OR_NULL(inode)) fid = AFS_FS_I(inode)->fid; + _debug("splice %px", dentry->d_inode); d = d_splice_alias(inode, dentry); if (!IS_ERR_OR_NULL(d)) { d->d_fsdata = dentry->d_fsdata; @@ -965,6 +988,7 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, } else { trace_afs_lookup(dvnode, &dentry->d_name, &fid); } + _leave(""); return d; } @@ -1215,130 +1239,97 @@ void afs_d_release(struct dentry *dentry) /* * Create a new inode for create/mkdir/symlink */ -static void afs_vnode_new_inode(struct afs_fs_cursor *fc, - struct dentry *new_dentry, - struct afs_iget_data *new_data, - struct afs_status_cb *new_scb) +static void afs_vnode_new_inode(struct afs_operation *op) { + struct afs_vnode_param *vp = &op->file[1]; struct afs_vnode *vnode; struct inode *inode; - if (fc->ac.error < 0) - return; + _enter(""); + + ASSERTCMP(op->error, ==, 0); - inode = afs_iget(fc->vnode->vfs_inode.i_sb, fc->key, - new_data, new_scb, fc->cbi, fc->vnode); + inode = afs_iget(op, vp); if (IS_ERR(inode)) { /* ENOMEM or EINTR at a really inconvenient time - just abandon * the new directory on the server. */ - fc->ac.error = PTR_ERR(inode); + op->error = PTR_ERR(inode); return; } vnode = AFS_FS_I(inode); set_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags); - if (fc->ac.error == 0) - afs_cache_permit(vnode, fc->key, vnode->cb_break, new_scb); - d_instantiate(new_dentry, inode); + if (!op->error) + afs_cache_permit(vnode, op->key, vnode->cb_break, &vp->scb); + d_instantiate(op->dentry, inode); } -static void afs_prep_for_new_inode(struct afs_fs_cursor *fc, - struct afs_iget_data *iget_data) +static void afs_create_success(struct afs_operation *op) { - iget_data->volume = fc->vnode->volume; - iget_data->cb_v_break = fc->vnode->volume->cb_v_break; - iget_data->cb_s_break = fc->cbi->server->cb_s_break; + _enter("op=%08x", op->debug_id); + afs_check_for_remote_deletion(op, op->file[0].vnode); + afs_vnode_commit_status(op, &op->file[0]); + afs_update_dentry_version(op, &op->file[0], op->dentry); + afs_vnode_new_inode(op); } -/* - * Note that a dentry got changed. We need to set d_fsdata to the data version - * number derived from the result of the operation. It doesn't matter if - * d_fsdata goes backwards as we'll just revalidate. - */ -static void afs_update_dentry_version(struct afs_fs_cursor *fc, - struct dentry *dentry, - struct afs_status_cb *scb) +static void afs_create_edit_dir(struct afs_operation *op) +{ + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode_param *vp = &op->file[1]; + struct afs_vnode *dvnode = dvp->vnode; + + _enter("op=%08x", op->debug_id); + + down_write(&dvnode->validate_lock); + if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags) && + dvnode->status.data_version == dvp->dv_before + dvp->dv_delta) + afs_edit_dir_add(dvnode, &op->dentry->d_name, &vp->fid, + op->create.reason); + up_write(&dvnode->validate_lock); +} + +static void afs_create_put(struct afs_operation *op) { - if (fc->ac.error == 0) - dentry->d_fsdata = - (void *)(unsigned long)scb->status.data_version; + _enter("op=%08x", op->debug_id); + + if (op->error) + d_drop(op->dentry); } +static const struct afs_operation_ops afs_mkdir_operation = { + .issue_afs_rpc = afs_fs_make_dir, + .issue_yfs_rpc = yfs_fs_make_dir, + .success = afs_create_success, + .edit_dir = afs_create_edit_dir, + .put = afs_create_put, +}; + /* * create a directory on an AFS filesystem */ static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) { - struct afs_iget_data iget_data; - struct afs_status_cb *scb; - struct afs_fs_cursor fc; + struct afs_operation *op; struct afs_vnode *dvnode = AFS_FS_I(dir); - struct key *key; - afs_dataversion_t data_version; - int ret; - - mode |= S_IFDIR; _enter("{%llx:%llu},{%pd},%ho", dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); - ret = -ENOMEM; - scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); - if (!scb) - goto error; - - key = afs_request_key(dvnode->volume->cell); - if (IS_ERR(key)) { - ret = PTR_ERR(key); - goto error_scb; + op = afs_alloc_operation(NULL, dvnode->volume); + if (IS_ERR(op)) { + d_drop(dentry); + return PTR_ERR(op); } - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { - data_version = dvnode->status.data_version + 1; - - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(dvnode); - afs_prep_for_new_inode(&fc, &iget_data); - afs_fs_create(&fc, dentry->d_name.name, mode, - &scb[0], &iget_data.fid, &scb[1]); - } - - afs_check_for_remote_deletion(&fc, dvnode); - afs_vnode_commit_status(&fc, dvnode, fc.cb_break, - &data_version, &scb[0]); - afs_update_dentry_version(&fc, dentry, &scb[0]); - afs_vnode_new_inode(&fc, dentry, &iget_data, &scb[1]); - ret = afs_end_vnode_operation(&fc); - if (ret < 0) - goto error_key; - } else { - goto error_key; - } - - if (ret == 0) { - down_write(&dvnode->validate_lock); - if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags) && - dvnode->status.data_version == data_version) - afs_edit_dir_add(dvnode, &dentry->d_name, &iget_data.fid, - afs_edit_dir_for_create); - up_write(&dvnode->validate_lock); - } - - key_put(key); - kfree(scb); - _leave(" = 0"); - return 0; - -error_key: - key_put(key); -error_scb: - kfree(scb); -error: - d_drop(dentry); - _leave(" = %d", ret); - return ret; + afs_op_set_vnode(op, 0, dvnode); + op->file[0].dv_delta = 1; + op->dentry = dentry; + op->create.mode = S_IFDIR | mode; + op->create.reason = afs_edit_dir_for_mkdir; + op->ops = &afs_mkdir_operation; + return afs_do_sync_operation(op); } /* @@ -1356,76 +1347,86 @@ static void afs_dir_remove_subdir(struct dentry *dentry) } } +static void afs_rmdir_success(struct afs_operation *op) +{ + _enter("op=%08x", op->debug_id); + afs_check_for_remote_deletion(op, op->file[0].vnode); + afs_vnode_commit_status(op, &op->file[0]); + afs_update_dentry_version(op, &op->file[0], op->dentry); +} + +static void afs_rmdir_edit_dir(struct afs_operation *op) +{ + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode *dvnode = dvp->vnode; + + _enter("op=%08x", op->debug_id); + afs_dir_remove_subdir(op->dentry); + + down_write(&dvnode->validate_lock); + if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags) && + dvnode->status.data_version == dvp->dv_before + dvp->dv_delta) + afs_edit_dir_remove(dvnode, &op->dentry->d_name, + afs_edit_dir_for_rmdir); + up_write(&dvnode->validate_lock); +} + +static void afs_rmdir_put(struct afs_operation *op) +{ + _enter("op=%08x", op->debug_id); + if (op->file[1].vnode) + up_write(&op->file[1].vnode->rmdir_lock); +} + +static const struct afs_operation_ops afs_rmdir_operation = { + .issue_afs_rpc = afs_fs_remove_dir, + .issue_yfs_rpc = yfs_fs_remove_dir, + .success = afs_rmdir_success, + .edit_dir = afs_rmdir_edit_dir, + .put = afs_rmdir_put, +}; + /* * remove a directory from an AFS filesystem */ static int afs_rmdir(struct inode *dir, struct dentry *dentry) { - struct afs_status_cb *scb; - struct afs_fs_cursor fc; + struct afs_operation *op; struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode = NULL; - struct key *key; - afs_dataversion_t data_version; int ret; _enter("{%llx:%llu},{%pd}", dvnode->fid.vid, dvnode->fid.vnode, dentry); - scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL); - if (!scb) - return -ENOMEM; + op = afs_alloc_operation(NULL, dvnode->volume); + if (IS_ERR(op)) + return PTR_ERR(op); - key = afs_request_key(dvnode->volume->cell); - if (IS_ERR(key)) { - ret = PTR_ERR(key); - goto error; - } + afs_op_set_vnode(op, 0, dvnode); + op->file[0].dv_delta = 1; + + op->dentry = dentry; + op->ops = &afs_rmdir_operation; /* Try to make sure we have a callback promise on the victim. */ if (d_really_is_positive(dentry)) { vnode = AFS_FS_I(d_inode(dentry)); - ret = afs_validate(vnode, key); + ret = afs_validate(vnode, op->key); if (ret < 0) - goto error_key; + goto error; } if (vnode) { ret = down_write_killable(&vnode->rmdir_lock); if (ret < 0) - goto error_key; + goto error; + op->file[1].vnode = vnode; } - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { - data_version = dvnode->status.data_version + 1; - - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(dvnode); - afs_fs_remove(&fc, vnode, dentry->d_name.name, true, scb); - } - - afs_vnode_commit_status(&fc, dvnode, fc.cb_break, - &data_version, scb); - afs_update_dentry_version(&fc, dentry, scb); - ret = afs_end_vnode_operation(&fc); - if (ret == 0) { - afs_dir_remove_subdir(dentry); - down_write(&dvnode->validate_lock); - if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags) && - dvnode->status.data_version == data_version) - afs_edit_dir_remove(dvnode, &dentry->d_name, - afs_edit_dir_for_rmdir); - up_write(&dvnode->validate_lock); - } - } + return afs_do_sync_operation(op); - if (vnode) - up_write(&vnode->rmdir_lock); -error_key: - key_put(key); error: - kfree(scb); - return ret; + return afs_put_operation(op); } /* @@ -1438,52 +1439,90 @@ error: * However, if we didn't have a callback promise outstanding, or it was * outstanding on a different server, then it won't break it either... */ -static int afs_dir_remove_link(struct afs_vnode *dvnode, struct dentry *dentry, - struct key *key) +static void afs_dir_remove_link(struct afs_operation *op) { - int ret = 0; + struct afs_vnode *dvnode = op->file[0].vnode; + struct afs_vnode *vnode = op->file[1].vnode; + struct dentry *dentry = op->dentry; + int ret; - if (d_really_is_positive(dentry)) { - struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); + if (op->error != 0 || + (op->file[1].scb.have_status && op->file[1].scb.have_error)) + return; + if (d_really_is_positive(dentry)) + return; - if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) { - /* Already done */ - } else if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) { - write_seqlock(&vnode->cb_lock); - drop_nlink(&vnode->vfs_inode); - if (vnode->vfs_inode.i_nlink == 0) { - set_bit(AFS_VNODE_DELETED, &vnode->flags); - __afs_break_callback(vnode, afs_cb_break_for_unlink); - } - write_sequnlock(&vnode->cb_lock); - ret = 0; - } else { - afs_break_callback(vnode, afs_cb_break_for_unlink); + if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) { + /* Already done */ + } else if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) { + write_seqlock(&vnode->cb_lock); + drop_nlink(&vnode->vfs_inode); + if (vnode->vfs_inode.i_nlink == 0) { + set_bit(AFS_VNODE_DELETED, &vnode->flags); + __afs_break_callback(vnode, afs_cb_break_for_unlink); + } + write_sequnlock(&vnode->cb_lock); + } else { + afs_break_callback(vnode, afs_cb_break_for_unlink); - if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) - kdebug("AFS_VNODE_DELETED"); + if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) + _debug("AFS_VNODE_DELETED"); - ret = afs_validate(vnode, key); - if (ret == -ESTALE) - ret = 0; - } - _debug("nlink %d [val %d]", vnode->vfs_inode.i_nlink, ret); + ret = afs_validate(vnode, op->key); + if (ret != -ESTALE) + op->error = ret; } - return ret; + _debug("nlink %d [val %d]", vnode->vfs_inode.i_nlink, op->error); +} + +static void afs_unlink_success(struct afs_operation *op) +{ + _enter("op=%08x", op->debug_id); + afs_check_for_remote_deletion(op, op->file[0].vnode); + afs_vnode_commit_status(op, &op->file[0]); + afs_vnode_commit_status(op, &op->file[1]); + afs_update_dentry_version(op, &op->file[0], op->dentry); + afs_dir_remove_link(op); +} + +static void afs_unlink_edit_dir(struct afs_operation *op) +{ + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode *dvnode = dvp->vnode; + + _enter("op=%08x", op->debug_id); + down_write(&dvnode->validate_lock); + if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags) && + dvnode->status.data_version == dvp->dv_before + dvp->dv_delta) + afs_edit_dir_remove(dvnode, &op->dentry->d_name, + afs_edit_dir_for_unlink); + up_write(&dvnode->validate_lock); +} + +static void afs_unlink_put(struct afs_operation *op) +{ + _enter("op=%08x", op->debug_id); + if (op->unlink.need_rehash && op->error < 0 && op->error != -ENOENT) + d_rehash(op->dentry); } +static const struct afs_operation_ops afs_unlink_operation = { + .issue_afs_rpc = afs_fs_remove_file, + .issue_yfs_rpc = yfs_fs_remove_file, + .success = afs_unlink_success, + .edit_dir = afs_unlink_edit_dir, + .put = afs_unlink_put, +}; + /* * Remove a file or symlink from an AFS filesystem. */ static int afs_unlink(struct inode *dir, struct dentry *dentry) { - struct afs_fs_cursor fc; - struct afs_status_cb *scb; + struct afs_operation *op; struct afs_vnode *dvnode = AFS_FS_I(dir); struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); - struct key *key; - bool need_rehash = false; int ret; _enter("{%llx:%llu},{%pd}", @@ -1492,269 +1531,176 @@ static int afs_unlink(struct inode *dir, struct dentry *dentry) if (dentry->d_name.len >= AFSNAMEMAX) return -ENAMETOOLONG; - ret = -ENOMEM; - scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); - if (!scb) - goto error; + op = afs_alloc_operation(NULL, dvnode->volume); + if (IS_ERR(op)) + return PTR_ERR(op); - key = afs_request_key(dvnode->volume->cell); - if (IS_ERR(key)) { - ret = PTR_ERR(key); - goto error_scb; - } + afs_op_set_vnode(op, 0, dvnode); + op->file[0].dv_delta = 1; /* Try to make sure we have a callback promise on the victim. */ - ret = afs_validate(vnode, key); - if (ret < 0) - goto error_key; + ret = afs_validate(vnode, op->key); + if (ret < 0) { + op->error = ret; + goto error; + } spin_lock(&dentry->d_lock); if (d_count(dentry) > 1) { spin_unlock(&dentry->d_lock); /* Start asynchronous writeout of the inode */ write_inode_now(d_inode(dentry), 0); - ret = afs_sillyrename(dvnode, vnode, dentry, key); - goto error_key; + op->error = afs_sillyrename(dvnode, vnode, dentry, op->key); + goto error; } if (!d_unhashed(dentry)) { /* Prevent a race with RCU lookup. */ __d_drop(dentry); - need_rehash = true; + op->unlink.need_rehash = true; } spin_unlock(&dentry->d_lock); - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { - afs_dataversion_t data_version = dvnode->status.data_version + 1; - afs_dataversion_t data_version_2 = vnode->status.data_version; - - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(dvnode); - fc.cb_break_2 = afs_calc_vnode_cb_break(vnode); - - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc.cbi->server->flags) && - !test_bit(AFS_SERVER_FL_NO_RM2, &fc.cbi->server->flags)) { - yfs_fs_remove_file2(&fc, vnode, dentry->d_name.name, - &scb[0], &scb[1]); - if (fc.ac.error != -ECONNABORTED || - fc.ac.abort_code != RXGEN_OPCODE) - continue; - set_bit(AFS_SERVER_FL_NO_RM2, &fc.cbi->server->flags); - } - - afs_fs_remove(&fc, vnode, dentry->d_name.name, false, &scb[0]); - } + op->file[1].vnode = vnode; + op->dentry = dentry; + op->ops = &afs_unlink_operation; + return afs_do_sync_operation(op); - afs_vnode_commit_status(&fc, dvnode, fc.cb_break, - &data_version, &scb[0]); - afs_vnode_commit_status(&fc, vnode, fc.cb_break_2, - &data_version_2, &scb[1]); - afs_update_dentry_version(&fc, dentry, &scb[0]); - ret = afs_end_vnode_operation(&fc); - if (ret == 0 && !(scb[1].have_status || scb[1].have_error)) - ret = afs_dir_remove_link(dvnode, dentry, key); - - if (ret == 0) { - down_write(&dvnode->validate_lock); - if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags) && - dvnode->status.data_version == data_version) - afs_edit_dir_remove(dvnode, &dentry->d_name, - afs_edit_dir_for_unlink); - up_write(&dvnode->validate_lock); - } - } - - if (need_rehash && ret < 0 && ret != -ENOENT) - d_rehash(dentry); - -error_key: - key_put(key); -error_scb: - kfree(scb); error: - _leave(" = %d", ret); - return ret; + return afs_put_operation(op); } +static const struct afs_operation_ops afs_create_operation = { + .issue_afs_rpc = afs_fs_create_file, + .issue_yfs_rpc = yfs_fs_create_file, + .success = afs_create_success, + .edit_dir = afs_create_edit_dir, + .put = afs_create_put, +}; + /* * create a regular file on an AFS filesystem */ static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl) { - struct afs_iget_data iget_data; - struct afs_fs_cursor fc; - struct afs_status_cb *scb; + struct afs_operation *op; struct afs_vnode *dvnode = AFS_FS_I(dir); - struct key *key; - afs_dataversion_t data_version; - int ret; - - mode |= S_IFREG; + int ret = -ENAMETOOLONG; - _enter("{%llx:%llu},{%pd},%ho,", + _enter("{%llx:%llu},{%pd},%ho", dvnode->fid.vid, dvnode->fid.vnode, dentry, mode); - ret = -ENAMETOOLONG; if (dentry->d_name.len >= AFSNAMEMAX) goto error; - key = afs_request_key(dvnode->volume->cell); - if (IS_ERR(key)) { - ret = PTR_ERR(key); + op = afs_alloc_operation(NULL, dvnode->volume); + if (IS_ERR(op)) { + ret = PTR_ERR(op); goto error; } - ret = -ENOMEM; - scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); - if (!scb) - goto error_scb; + afs_op_set_vnode(op, 0, dvnode); + op->file[0].dv_delta = 1; - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { - data_version = dvnode->status.data_version + 1; - - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(dvnode); - afs_prep_for_new_inode(&fc, &iget_data); - afs_fs_create(&fc, dentry->d_name.name, mode, - &scb[0], &iget_data.fid, &scb[1]); - } + op->dentry = dentry; + op->create.mode = S_IFREG | mode; + op->create.reason = afs_edit_dir_for_create; + op->ops = &afs_create_operation; + return afs_do_sync_operation(op); - afs_check_for_remote_deletion(&fc, dvnode); - afs_vnode_commit_status(&fc, dvnode, fc.cb_break, - &data_version, &scb[0]); - afs_update_dentry_version(&fc, dentry, &scb[0]); - afs_vnode_new_inode(&fc, dentry, &iget_data, &scb[1]); - ret = afs_end_vnode_operation(&fc); - if (ret < 0) - goto error_key; - } else { - goto error_key; - } - - down_write(&dvnode->validate_lock); - if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags) && - dvnode->status.data_version == data_version) - afs_edit_dir_add(dvnode, &dentry->d_name, &iget_data.fid, - afs_edit_dir_for_create); - up_write(&dvnode->validate_lock); - - kfree(scb); - key_put(key); - _leave(" = 0"); - return 0; - -error_scb: - kfree(scb); -error_key: - key_put(key); error: d_drop(dentry); _leave(" = %d", ret); return ret; } +static void afs_link_success(struct afs_operation *op) +{ + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode_param *vp = &op->file[1]; + + _enter("op=%08x", op->debug_id); + afs_vnode_commit_status(op, dvp); + afs_vnode_commit_status(op, vp); + afs_update_dentry_version(op, dvp, op->dentry); + if (op->dentry_2->d_parent == op->dentry->d_parent) + afs_update_dentry_version(op, dvp, op->dentry_2); + ihold(&vp->vnode->vfs_inode); + d_instantiate(op->dentry, &vp->vnode->vfs_inode); +} + +static void afs_link_put(struct afs_operation *op) +{ + _enter("op=%08x", op->debug_id); + if (op->error) + d_drop(op->dentry); +} + +static const struct afs_operation_ops afs_link_operation = { + .issue_afs_rpc = afs_fs_link, + .issue_yfs_rpc = yfs_fs_link, + .success = afs_link_success, + .edit_dir = afs_create_edit_dir, + .put = afs_link_put, +}; + /* * create a hard link between files in an AFS filesystem */ static int afs_link(struct dentry *from, struct inode *dir, struct dentry *dentry) { - struct afs_fs_cursor fc; - struct afs_status_cb *scb; + struct afs_operation *op; struct afs_vnode *dvnode = AFS_FS_I(dir); struct afs_vnode *vnode = AFS_FS_I(d_inode(from)); - struct key *key; - afs_dataversion_t data_version; - int ret; + int ret = -ENAMETOOLONG; _enter("{%llx:%llu},{%llx:%llu},{%pd}", vnode->fid.vid, vnode->fid.vnode, dvnode->fid.vid, dvnode->fid.vnode, dentry); - ret = -ENAMETOOLONG; if (dentry->d_name.len >= AFSNAMEMAX) goto error; - ret = -ENOMEM; - scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); - if (!scb) + op = afs_alloc_operation(NULL, dvnode->volume); + if (IS_ERR(op)) { + ret = PTR_ERR(op); goto error; - - key = afs_request_key(dvnode->volume->cell); - if (IS_ERR(key)) { - ret = PTR_ERR(key); - goto error_scb; - } - - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { - data_version = dvnode->status.data_version + 1; - - if (mutex_lock_interruptible_nested(&vnode->io_lock, 1) < 0) { - afs_end_vnode_operation(&fc); - goto error_key; - } - - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(dvnode); - fc.cb_break_2 = afs_calc_vnode_cb_break(vnode); - afs_fs_link(&fc, vnode, dentry->d_name.name, - &scb[0], &scb[1]); - } - - afs_vnode_commit_status(&fc, dvnode, fc.cb_break, - &data_version, &scb[0]); - afs_vnode_commit_status(&fc, vnode, fc.cb_break_2, - NULL, &scb[1]); - ihold(&vnode->vfs_inode); - afs_update_dentry_version(&fc, dentry, &scb[0]); - d_instantiate(dentry, &vnode->vfs_inode); - - mutex_unlock(&vnode->io_lock); - ret = afs_end_vnode_operation(&fc); - if (ret < 0) - goto error_key; - } else { - goto error_key; } - down_write(&dvnode->validate_lock); - if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags) && - dvnode->status.data_version == data_version) - afs_edit_dir_add(dvnode, &dentry->d_name, &vnode->fid, - afs_edit_dir_for_link); - up_write(&dvnode->validate_lock); + afs_op_set_vnode(op, 0, dvnode); + afs_op_set_vnode(op, 1, vnode); + op->file[0].dv_delta = 1; - key_put(key); - kfree(scb); - _leave(" = 0"); - return 0; + op->dentry = dentry; + op->dentry_2 = from; + op->ops = &afs_link_operation; + op->create.reason = afs_edit_dir_for_link; + return afs_do_sync_operation(op); -error_key: - key_put(key); -error_scb: - kfree(scb); error: d_drop(dentry); _leave(" = %d", ret); return ret; } +static const struct afs_operation_ops afs_symlink_operation = { + .issue_afs_rpc = afs_fs_symlink, + .issue_yfs_rpc = yfs_fs_symlink, + .success = afs_create_success, + .edit_dir = afs_create_edit_dir, + .put = afs_create_put, +}; + /* * create a symlink in an AFS filesystem */ static int afs_symlink(struct inode *dir, struct dentry *dentry, const char *content) { - struct afs_iget_data iget_data; - struct afs_fs_cursor fc; - struct afs_status_cb *scb; + struct afs_operation *op; struct afs_vnode *dvnode = AFS_FS_I(dir); - struct key *key; - afs_dataversion_t data_version; int ret; _enter("{%llx:%llu},{%pd},%s", @@ -1769,62 +1715,115 @@ static int afs_symlink(struct inode *dir, struct dentry *dentry, if (strlen(content) >= AFSPATHMAX) goto error; - ret = -ENOMEM; - scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); - if (!scb) + op = afs_alloc_operation(NULL, dvnode->volume); + if (IS_ERR(op)) { + ret = PTR_ERR(op); goto error; - - key = afs_request_key(dvnode->volume->cell); - if (IS_ERR(key)) { - ret = PTR_ERR(key); - goto error_scb; } - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { - data_version = dvnode->status.data_version + 1; - - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(dvnode); - afs_prep_for_new_inode(&fc, &iget_data); - afs_fs_symlink(&fc, dentry->d_name.name, content, - &scb[0], &iget_data.fid, &scb[1]); - } + afs_op_set_vnode(op, 0, dvnode); + op->file[0].dv_delta = 1; - afs_check_for_remote_deletion(&fc, dvnode); - afs_vnode_commit_status(&fc, dvnode, fc.cb_break, - &data_version, &scb[0]); - afs_update_dentry_version(&fc, dentry, &scb[0]); - afs_vnode_new_inode(&fc, dentry, &iget_data, &scb[1]); - ret = afs_end_vnode_operation(&fc); - if (ret < 0) - goto error_key; - } else { - goto error_key; - } - - down_write(&dvnode->validate_lock); - if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags) && - dvnode->status.data_version == data_version) - afs_edit_dir_add(dvnode, &dentry->d_name, &iget_data.fid, - afs_edit_dir_for_symlink); - up_write(&dvnode->validate_lock); + op->dentry = dentry; + op->ops = &afs_symlink_operation; + op->create.reason = afs_edit_dir_for_symlink; + op->create.symlink = content; + return afs_do_sync_operation(op); - key_put(key); - kfree(scb); - _leave(" = 0"); - return 0; - -error_key: - key_put(key); -error_scb: - kfree(scb); error: d_drop(dentry); _leave(" = %d", ret); return ret; } +static void afs_rename_success(struct afs_operation *op) +{ + _enter("op=%08x", op->debug_id); + + afs_vnode_commit_status(op, &op->file[0]); + if (op->file[1].vnode != op->file[0].vnode) + afs_vnode_commit_status(op, &op->file[1]); +} + +static void afs_rename_edit_dir(struct afs_operation *op) +{ + struct afs_vnode_param *orig_dvp = &op->file[0]; + struct afs_vnode_param *new_dvp = &op->file[1]; + struct afs_vnode *orig_dvnode = orig_dvp->vnode; + struct afs_vnode *new_dvnode = new_dvp->vnode; + struct afs_vnode *vnode = AFS_FS_I(d_inode(op->dentry)); + struct dentry *old_dentry = op->dentry; + struct dentry *new_dentry = op->dentry_2; + struct inode *new_inode; + + _enter("op=%08x", op->debug_id); + + if (op->rename.rehash) { + d_rehash(op->rename.rehash); + op->rename.rehash = NULL; + } + + down_write(&orig_dvnode->validate_lock); + if (test_bit(AFS_VNODE_DIR_VALID, &orig_dvnode->flags) && + orig_dvnode->status.data_version == orig_dvp->dv_before + orig_dvp->dv_delta) + afs_edit_dir_remove(orig_dvnode, &old_dentry->d_name, + afs_edit_dir_for_rename_0); + + if (new_dvnode != orig_dvnode) { + up_write(&orig_dvnode->validate_lock); + down_write(&new_dvnode->validate_lock); + } + + if (test_bit(AFS_VNODE_DIR_VALID, &new_dvnode->flags) && + new_dvnode->status.data_version == new_dvp->dv_before + new_dvp->dv_delta) { + if (!op->rename.new_negative) + afs_edit_dir_remove(new_dvnode, &new_dentry->d_name, + afs_edit_dir_for_rename_1); + + afs_edit_dir_add(new_dvnode, &new_dentry->d_name, + &vnode->fid, afs_edit_dir_for_rename_2); + } + + new_inode = d_inode(new_dentry); + if (new_inode) { + spin_lock(&new_inode->i_lock); + if (new_inode->i_nlink > 0) + drop_nlink(new_inode); + spin_unlock(&new_inode->i_lock); + } + + /* Now we can update d_fsdata on the dentries to reflect their + * new parent's data_version. + * + * Note that if we ever implement RENAME_EXCHANGE, we'll have + * to update both dentries with opposing dir versions. + */ + afs_update_dentry_version(op, new_dvp, op->dentry); + afs_update_dentry_version(op, new_dvp, op->dentry_2); + + d_move(old_dentry, new_dentry); + + up_write(&new_dvnode->validate_lock); +} + +static void afs_rename_put(struct afs_operation *op) +{ + _enter("op=%08x", op->debug_id); + if (op->rename.rehash) + d_rehash(op->rename.rehash); + dput(op->rename.tmp); + if (op->error) + d_rehash(op->dentry); +} + +static const struct afs_operation_ops afs_rename_operation = { + .issue_afs_rpc = afs_fs_rename, + .issue_yfs_rpc = yfs_fs_rename, + .success = afs_rename_success, + .edit_dir = afs_rename_edit_dir, + .put = afs_rename_put, +}; + /* * rename a file in an AFS filesystem and/or move it between directories */ @@ -1832,15 +1831,8 @@ static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry, unsigned int flags) { - struct afs_fs_cursor fc; - struct afs_status_cb *scb; + struct afs_operation *op; struct afs_vnode *orig_dvnode, *new_dvnode, *vnode; - struct dentry *tmp = NULL, *rehash = NULL; - struct inode *new_inode; - struct key *key; - afs_dataversion_t orig_data_version; - afs_dataversion_t new_data_version; - bool new_negative = d_is_negative(new_dentry); int ret; if (flags) @@ -1860,16 +1852,19 @@ static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, new_dvnode->fid.vid, new_dvnode->fid.vnode, new_dentry); - ret = -ENOMEM; - scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); - if (!scb) - goto error; + op = afs_alloc_operation(NULL, orig_dvnode->volume); + if (IS_ERR(op)) + return PTR_ERR(op); - key = afs_request_key(orig_dvnode->volume->cell); - if (IS_ERR(key)) { - ret = PTR_ERR(key); - goto error_scb; - } + afs_op_set_vnode(op, 0, orig_dvnode); + afs_op_set_vnode(op, 1, new_dvnode); /* May be same as orig_dvnode */ + op->file[0].dv_delta = 1; + op->file[1].dv_delta = 1; + + op->dentry = old_dentry; + op->dentry_2 = new_dentry; + op->rename.new_negative = d_is_negative(new_dentry); + op->ops = &afs_rename_operation; /* For non-directories, check whether the target is busy and if so, * make a copy of the dentry and then do a silly-rename. If the @@ -1882,26 +1877,26 @@ static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, */ if (!d_unhashed(new_dentry)) { d_drop(new_dentry); - rehash = new_dentry; + op->rename.rehash = new_dentry; } if (d_count(new_dentry) > 2) { /* copy the target dentry's name */ ret = -ENOMEM; - tmp = d_alloc(new_dentry->d_parent, - &new_dentry->d_name); - if (!tmp) - goto error_rehash; + op->rename.tmp = d_alloc(new_dentry->d_parent, + &new_dentry->d_name); + if (!op->rename.tmp) + goto error; ret = afs_sillyrename(new_dvnode, AFS_FS_I(d_inode(new_dentry)), - new_dentry, key); + new_dentry, op->key); if (ret) - goto error_rehash; + goto error; - new_dentry = tmp; - rehash = NULL; - new_negative = true; + op->dentry_2 = op->rename.tmp; + op->rename.rehash = NULL; + op->rename.new_negative = true; } } @@ -1916,98 +1911,10 @@ static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, */ d_drop(old_dentry); - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, orig_dvnode, key, true)) { - orig_data_version = orig_dvnode->status.data_version + 1; - - if (orig_dvnode != new_dvnode) { - if (mutex_lock_interruptible_nested(&new_dvnode->io_lock, 1) < 0) { - afs_end_vnode_operation(&fc); - goto error_rehash_old; - } - new_data_version = new_dvnode->status.data_version + 1; - } else { - new_data_version = orig_data_version; - } - - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(orig_dvnode); - fc.cb_break_2 = afs_calc_vnode_cb_break(new_dvnode); - afs_fs_rename(&fc, old_dentry->d_name.name, - new_dvnode, new_dentry->d_name.name, - &scb[0], &scb[1]); - } + return afs_do_sync_operation(op); - afs_vnode_commit_status(&fc, orig_dvnode, fc.cb_break, - &orig_data_version, &scb[0]); - if (new_dvnode != orig_dvnode) { - afs_vnode_commit_status(&fc, new_dvnode, fc.cb_break_2, - &new_data_version, &scb[1]); - mutex_unlock(&new_dvnode->io_lock); - } - ret = afs_end_vnode_operation(&fc); - if (ret < 0) - goto error_rehash_old; - } - - if (ret == 0) { - if (rehash) - d_rehash(rehash); - down_write(&orig_dvnode->validate_lock); - if (test_bit(AFS_VNODE_DIR_VALID, &orig_dvnode->flags) && - orig_dvnode->status.data_version == orig_data_version) - afs_edit_dir_remove(orig_dvnode, &old_dentry->d_name, - afs_edit_dir_for_rename_0); - if (orig_dvnode != new_dvnode) { - up_write(&orig_dvnode->validate_lock); - - down_write(&new_dvnode->validate_lock); - } - if (test_bit(AFS_VNODE_DIR_VALID, &new_dvnode->flags) && - orig_dvnode->status.data_version == new_data_version) { - if (!new_negative) - afs_edit_dir_remove(new_dvnode, &new_dentry->d_name, - afs_edit_dir_for_rename_1); - - afs_edit_dir_add(new_dvnode, &new_dentry->d_name, - &vnode->fid, afs_edit_dir_for_rename_2); - } - - new_inode = d_inode(new_dentry); - if (new_inode) { - spin_lock(&new_inode->i_lock); - if (new_inode->i_nlink > 0) - drop_nlink(new_inode); - spin_unlock(&new_inode->i_lock); - } - - /* Now we can update d_fsdata on the dentries to reflect their - * new parent's data_version. - * - * Note that if we ever implement RENAME_EXCHANGE, we'll have - * to update both dentries with opposing dir versions. - */ - afs_update_dentry_version(&fc, old_dentry, &scb[1]); - afs_update_dentry_version(&fc, new_dentry, &scb[1]); - d_move(old_dentry, new_dentry); - up_write(&new_dvnode->validate_lock); - goto error_tmp; - } - -error_rehash_old: - d_rehash(new_dentry); -error_rehash: - if (rehash) - d_rehash(rehash); -error_tmp: - if (tmp) - dput(tmp); - key_put(key); -error_scb: - kfree(scb); error: - _leave(" = %d", ret); - return ret; + return afs_put_operation(op); } /* diff --git a/fs/afs/dir_silly.c b/fs/afs/dir_silly.c index d94e2b7..b14e3d9 100644 --- a/fs/afs/dir_silly.c +++ b/fs/afs/dir_silly.c @@ -12,6 +12,47 @@ #include #include "internal.h" +static void afs_silly_rename_success(struct afs_operation *op) +{ + _enter("op=%08x", op->debug_id); + + afs_vnode_commit_status(op, &op->file[0]); +} + +static void afs_silly_rename_edit_dir(struct afs_operation *op) +{ + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode *dvnode = dvp->vnode; + struct afs_vnode *vnode = AFS_FS_I(d_inode(op->dentry)); + struct dentry *old = op->dentry; + struct dentry *new = op->dentry_2; + + spin_lock(&old->d_lock); + old->d_flags |= DCACHE_NFSFS_RENAMED; + spin_unlock(&old->d_lock); + if (dvnode->silly_key != op->key) { + key_put(dvnode->silly_key); + dvnode->silly_key = key_get(op->key); + } + + down_write(&dvnode->validate_lock); + if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags) && + dvnode->status.data_version == dvp->dv_before + dvp->dv_delta) { + afs_edit_dir_remove(dvnode, &old->d_name, + afs_edit_dir_for_silly_0); + afs_edit_dir_add(dvnode, &new->d_name, + &vnode->fid, afs_edit_dir_for_silly_1); + } + up_write(&dvnode->validate_lock); +} + +static const struct afs_operation_ops afs_silly_rename_operation = { + .issue_afs_rpc = afs_fs_rename, + .issue_yfs_rpc = yfs_fs_rename, + .success = afs_silly_rename_success, + .edit_dir = afs_silly_rename_edit_dir, +}; + /* * Actually perform the silly rename step. */ @@ -19,56 +60,22 @@ static int afs_do_silly_rename(struct afs_vnode *dvnode, struct afs_vnode *vnode struct dentry *old, struct dentry *new, struct key *key) { - struct afs_fs_cursor fc; - struct afs_status_cb *scb; - afs_dataversion_t dir_data_version; - int ret = -ERESTARTSYS; + struct afs_operation *op; _enter("%pd,%pd", old, new); - scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL); - if (!scb) - return -ENOMEM; + op = afs_alloc_operation(key, dvnode->volume); + if (IS_ERR(op)) + return PTR_ERR(op); - trace_afs_silly_rename(vnode, false); - if (afs_begin_vnode_operation(&fc, dvnode, key, true)) { - dir_data_version = dvnode->status.data_version + 1; - - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(dvnode); - afs_fs_rename(&fc, old->d_name.name, - dvnode, new->d_name.name, - scb, scb); - } - - afs_vnode_commit_status(&fc, dvnode, fc.cb_break, - &dir_data_version, scb); - ret = afs_end_vnode_operation(&fc); - } + afs_op_set_vnode(op, 0, dvnode); - if (ret == 0) { - spin_lock(&old->d_lock); - old->d_flags |= DCACHE_NFSFS_RENAMED; - spin_unlock(&old->d_lock); - if (dvnode->silly_key != key) { - key_put(dvnode->silly_key); - dvnode->silly_key = key_get(key); - } - - down_write(&dvnode->validate_lock); - if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags) && - dvnode->status.data_version == dir_data_version) { - afs_edit_dir_remove(dvnode, &old->d_name, - afs_edit_dir_for_silly_0); - afs_edit_dir_add(dvnode, &new->d_name, - &vnode->fid, afs_edit_dir_for_silly_1); - } - up_write(&dvnode->validate_lock); - } + op->dentry = old; + op->dentry_2 = new; + op->ops = &afs_silly_rename_operation; - kfree(scb); - _leave(" = %d", ret); - return ret; + trace_afs_silly_rename(vnode, false); + return afs_do_sync_operation(op); } /** @@ -139,65 +146,66 @@ out: return ret; } +static void afs_silly_unlink_success(struct afs_operation *op) +{ + struct afs_vnode *vnode = op->file[1].vnode; + + _enter("op=%08x", op->debug_id); + afs_check_for_remote_deletion(op, op->file[0].vnode); + afs_vnode_commit_status(op, &op->file[0]); + afs_vnode_commit_status(op, &op->file[1]); + afs_update_dentry_version(op, &op->file[0], op->dentry); + + drop_nlink(&vnode->vfs_inode); + if (vnode->vfs_inode.i_nlink == 0) { + set_bit(AFS_VNODE_DELETED, &vnode->flags); + clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); + } +} + +static void afs_silly_unlink_edit_dir(struct afs_operation *op) +{ + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode *dvnode = dvp->vnode; + + _enter("op=%08x", op->debug_id); + down_write(&dvnode->validate_lock); + if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags) && + dvnode->status.data_version == dvp->dv_before + dvp->dv_delta) + afs_edit_dir_remove(dvnode, &op->dentry->d_name, + afs_edit_dir_for_unlink); + up_write(&dvnode->validate_lock); +} + +static const struct afs_operation_ops afs_silly_unlink_operation = { + .issue_afs_rpc = afs_fs_remove_file, + .issue_yfs_rpc = yfs_fs_remove_file, + .success = afs_silly_unlink_success, + .edit_dir = afs_silly_unlink_edit_dir, +}; + /* * Tell the server to remove a sillyrename file. */ static int afs_do_silly_unlink(struct afs_vnode *dvnode, struct afs_vnode *vnode, struct dentry *dentry, struct key *key) { - struct afs_fs_cursor fc; - struct afs_status_cb *scb; - int ret = -ERESTARTSYS; + struct afs_operation *op; _enter(""); - scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL); - if (!scb) - return -ENOMEM; + op = afs_alloc_operation(NULL, dvnode->volume); + if (IS_ERR(op)) + return PTR_ERR(op); - trace_afs_silly_rename(vnode, true); - if (afs_begin_vnode_operation(&fc, dvnode, key, false)) { - afs_dataversion_t dir_data_version = dvnode->status.data_version + 1; - - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(dvnode); - - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc.cbi->server->flags) && - !test_bit(AFS_SERVER_FL_NO_RM2, &fc.cbi->server->flags)) { - yfs_fs_remove_file2(&fc, vnode, dentry->d_name.name, - &scb[0], &scb[1]); - if (fc.ac.error != -ECONNABORTED || - fc.ac.abort_code != RXGEN_OPCODE) - continue; - set_bit(AFS_SERVER_FL_NO_RM2, &fc.cbi->server->flags); - } - - afs_fs_remove(&fc, vnode, dentry->d_name.name, false, &scb[0]); - } + afs_op_set_vnode(op, 0, dvnode); + afs_op_set_vnode(op, 1, vnode); - afs_vnode_commit_status(&fc, dvnode, fc.cb_break, - &dir_data_version, &scb[0]); - ret = afs_end_vnode_operation(&fc); - if (ret == 0) { - drop_nlink(&vnode->vfs_inode); - if (vnode->vfs_inode.i_nlink == 0) { - set_bit(AFS_VNODE_DELETED, &vnode->flags); - clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); - } - } - if (ret == 0) { - down_write(&dvnode->validate_lock); - if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags) && - dvnode->status.data_version == dir_data_version) - afs_edit_dir_remove(dvnode, &dentry->d_name, - afs_edit_dir_for_unlink); - up_write(&dvnode->validate_lock); - } - } + op->dentry = dentry; + op->ops = &afs_silly_unlink_operation; - kfree(scb); - _leave(" = %d", ret); - return ret; + trace_afs_silly_rename(vnode, true); + return afs_do_sync_operation(op); } /* diff --git a/fs/afs/dynroot.c b/fs/afs/dynroot.c index 7503899..b79879a 100644 --- a/fs/afs/dynroot.c +++ b/fs/afs/dynroot.c @@ -10,6 +10,99 @@ #include #include "internal.h" +static atomic_t afs_autocell_ino; + +/* + * iget5() comparator for inode created by autocell operations + * + * These pseudo inodes don't match anything. + */ +static int afs_iget5_pseudo_test(struct inode *inode, void *opaque) +{ + return 0; +} + +/* + * iget5() inode initialiser + */ +static int afs_iget5_pseudo_set(struct inode *inode, void *opaque) +{ + struct afs_super_info *as = AFS_FS_S(inode->i_sb); + struct afs_vnode *vnode = AFS_FS_I(inode); + struct afs_fid *fid = opaque; + + vnode->volume = as->volume; + vnode->fid = *fid; + inode->i_ino = fid->vnode; + inode->i_generation = fid->unique; + return 0; +} + +/* + * Create an inode for a dynamic root directory or an autocell dynamic + * automount dir. + */ +struct inode *afs_iget_pseudo_dir(struct super_block *sb, bool root) +{ + struct afs_super_info *as = AFS_FS_S(sb); + struct afs_vnode *vnode; + struct inode *inode; + struct afs_fid fid = {}; + + _enter(""); + + if (as->volume) + fid.vid = as->volume->vid; + if (root) { + fid.vnode = 1; + fid.unique = 1; + } else { + fid.vnode = atomic_inc_return(&afs_autocell_ino); + fid.unique = 0; + } + + inode = iget5_locked(sb, fid.vnode, + afs_iget5_pseudo_test, afs_iget5_pseudo_set, &fid); + if (!inode) { + _leave(" = -ENOMEM"); + return ERR_PTR(-ENOMEM); + } + + _debug("GOT INODE %p { ino=%lu, vl=%llx, vn=%llx, u=%x }", + inode, inode->i_ino, fid.vid, fid.vnode, fid.unique); + + vnode = AFS_FS_I(inode); + + /* there shouldn't be an existing inode */ + BUG_ON(!(inode->i_state & I_NEW)); + + inode->i_size = 0; + inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; + if (root) { + inode->i_op = &afs_dynroot_inode_operations; + inode->i_fop = &simple_dir_operations; + } else { + inode->i_op = &afs_autocell_inode_operations; + } + set_nlink(inode, 2); + inode->i_uid = GLOBAL_ROOT_UID; + inode->i_gid = GLOBAL_ROOT_GID; + inode->i_ctime = inode->i_atime = inode->i_mtime = current_time(inode); + inode->i_blocks = 0; + inode->i_generation = 0; + + set_bit(AFS_VNODE_PSEUDODIR, &vnode->flags); + if (!root) { + set_bit(AFS_VNODE_MOUNTPOINT, &vnode->flags); + inode->i_flags |= S_AUTOMOUNT; + } + + inode->i_flags |= S_NOATIME; + unlock_new_inode(inode); + _leave(" = %p", inode); + return inode; +} + /* * Probe to see if a cell may exist. This prevents positive dentries from * being created unnecessarily. diff --git a/fs/afs/file.c b/fs/afs/file.c index 8415733..506c474 100644 --- a/fs/afs/file.c +++ b/fs/afs/file.c @@ -69,7 +69,7 @@ static const struct vm_operations_struct afs_vm_ops = { */ void afs_put_wb_key(struct afs_wb_key *wbk) { - if (refcount_dec_and_test(&wbk->usage)) { + if (wbk && refcount_dec_and_test(&wbk->usage)) { key_put(wbk->key); kfree(wbk); } @@ -220,14 +220,35 @@ static void afs_file_readpage_read_complete(struct page *page, } #endif +static void afs_fetch_data_success(struct afs_operation *op) +{ + struct afs_vnode *vnode = op->file[0].vnode; + + _enter("op=%08x", op->debug_id); + afs_check_for_remote_deletion(op, vnode); + afs_vnode_commit_status(op, &op->file[0]); + afs_stat_v(vnode, n_fetches); + atomic_long_add(op->fetch.req->actual_len, &op->net->n_fetch_bytes); +} + +static void afs_fetch_data_put(struct afs_operation *op) +{ + afs_put_read(op->fetch.req); +} + +static const struct afs_operation_ops afs_fetch_data_operation = { + .issue_afs_rpc = afs_fs_fetch_data, + .issue_yfs_rpc = yfs_fs_fetch_data, + .success = afs_fetch_data_success, + .put = afs_fetch_data_put, +}; + /* * Fetch file data from the volume. */ int afs_fetch_data(struct afs_vnode *vnode, struct key *key, struct afs_read *req) { - struct afs_fs_cursor fc; - struct afs_status_cb *scb; - int ret; + struct afs_operation *op; _enter("%s{%llx:%llu.%u},%x,,,", vnode->volume->name, @@ -236,34 +257,15 @@ int afs_fetch_data(struct afs_vnode *vnode, struct key *key, struct afs_read *re vnode->fid.unique, key_serial(key)); - scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL); - if (!scb) - return -ENOMEM; - - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, vnode, key, true)) { - afs_dataversion_t data_version = vnode->status.data_version; + op = afs_alloc_operation(key, vnode->volume); + if (IS_ERR(op)) + return PTR_ERR(op); - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(vnode); - afs_fs_fetch_data(&fc, scb, req); - } - - afs_check_for_remote_deletion(&fc, vnode); - afs_vnode_commit_status(&fc, vnode, fc.cb_break, - &data_version, scb); - ret = afs_end_vnode_operation(&fc); - } + afs_op_set_vnode(op, 0, vnode); - if (ret == 0) { - afs_stat_v(vnode, n_fetches); - atomic_long_add(req->actual_len, - &afs_v2net(vnode)->n_fetch_bytes); - } - - kfree(scb); - _leave(" = %d", ret); - return ret; + op->fetch.req = afs_get_read(req); + op->ops = &afs_fetch_data_operation; + return afs_do_sync_operation(op); } /* diff --git a/fs/afs/flock.c b/fs/afs/flock.c index 0f2a94b..70e518f 100644 --- a/fs/afs/flock.c +++ b/fs/afs/flock.c @@ -70,7 +70,8 @@ static void afs_schedule_lock_extension(struct afs_vnode *vnode) */ void afs_lock_op_done(struct afs_call *call) { - struct afs_vnode *vnode = call->lvnode; + struct afs_operation *op = call->op; + struct afs_vnode *vnode = op->lock.lvnode; if (call->error == 0) { spin_lock(&vnode->lock); @@ -172,15 +173,28 @@ static void afs_kill_lockers_enoent(struct afs_vnode *vnode) vnode->lock_key = NULL; } +static void afs_lock_success(struct afs_operation *op) +{ + struct afs_vnode *vnode = op->file[0].vnode; + + _enter("op=%08x", op->debug_id); + afs_check_for_remote_deletion(op, vnode); + afs_vnode_commit_status(op, &op->file[0]); +} + +static const struct afs_operation_ops afs_set_lock_operation = { + .issue_afs_rpc = afs_fs_set_lock, + .issue_yfs_rpc = yfs_fs_set_lock, + .success = afs_lock_success, +}; + /* * Get a lock on a file */ static int afs_set_lock(struct afs_vnode *vnode, struct key *key, afs_lock_type_t type) { - struct afs_status_cb *scb; - struct afs_fs_cursor fc; - int ret; + struct afs_operation *op; _enter("%s{%llx:%llu.%u},%x,%u", vnode->volume->name, @@ -189,35 +203,29 @@ static int afs_set_lock(struct afs_vnode *vnode, struct key *key, vnode->fid.unique, key_serial(key), type); - scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL); - if (!scb) - return -ENOMEM; + op = afs_alloc_operation(key, vnode->volume); + if (IS_ERR(op)) + return PTR_ERR(op); - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, vnode, key, true)) { - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(vnode); - afs_fs_set_lock(&fc, type, scb); - } - - afs_check_for_remote_deletion(&fc, vnode); - afs_vnode_commit_status(&fc, vnode, fc.cb_break, NULL, scb); - ret = afs_end_vnode_operation(&fc); - } + afs_op_set_vnode(op, 0, vnode); - kfree(scb); - _leave(" = %d", ret); - return ret; + op->lock.type = type; + op->ops = &afs_set_lock_operation; + return afs_do_sync_operation(op); } +static const struct afs_operation_ops afs_extend_lock_operation = { + .issue_afs_rpc = afs_fs_extend_lock, + .issue_yfs_rpc = yfs_fs_extend_lock, + .success = afs_lock_success, +}; + /* * Extend a lock on a file */ static int afs_extend_lock(struct afs_vnode *vnode, struct key *key) { - struct afs_status_cb *scb; - struct afs_fs_cursor fc; - int ret; + struct afs_operation *op; _enter("%s{%llx:%llu.%u},%x", vnode->volume->name, @@ -226,35 +234,29 @@ static int afs_extend_lock(struct afs_vnode *vnode, struct key *key) vnode->fid.unique, key_serial(key)); - scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL); - if (!scb) - return -ENOMEM; - - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, vnode, key, false)) { - while (afs_select_current_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(vnode); - afs_fs_extend_lock(&fc, scb); - } + op = afs_alloc_operation(key, vnode->volume); + if (IS_ERR(op)) + return PTR_ERR(op); - afs_check_for_remote_deletion(&fc, vnode); - afs_vnode_commit_status(&fc, vnode, fc.cb_break, NULL, scb); - ret = afs_end_vnode_operation(&fc); - } + afs_op_set_vnode(op, 0, vnode); - kfree(scb); - _leave(" = %d", ret); - return ret; + op->flags |= AFS_OPERATION_UNINTR; + op->ops = &afs_extend_lock_operation; + return afs_do_sync_operation(op); } +static const struct afs_operation_ops afs_release_lock_operation = { + .issue_afs_rpc = afs_fs_release_lock, + .issue_yfs_rpc = yfs_fs_release_lock, + .success = afs_lock_success, +}; + /* * Release a lock on a file */ static int afs_release_lock(struct afs_vnode *vnode, struct key *key) { - struct afs_status_cb *scb; - struct afs_fs_cursor fc; - int ret; + struct afs_operation *op; _enter("%s{%llx:%llu.%u},%x", vnode->volume->name, @@ -263,25 +265,15 @@ static int afs_release_lock(struct afs_vnode *vnode, struct key *key) vnode->fid.unique, key_serial(key)); - scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL); - if (!scb) - return -ENOMEM; + op = afs_alloc_operation(key, vnode->volume); + if (IS_ERR(op)) + return PTR_ERR(op); - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, vnode, key, false)) { - while (afs_select_current_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(vnode); - afs_fs_release_lock(&fc, scb); - } + afs_op_set_vnode(op, 0, vnode); - afs_check_for_remote_deletion(&fc, vnode); - afs_vnode_commit_status(&fc, vnode, fc.cb_break, NULL, scb); - ret = afs_end_vnode_operation(&fc); - } - - kfree(scb); - _leave(" = %d", ret); - return ret; + op->flags |= AFS_OPERATION_UNINTR; + op->ops = &afs_release_lock_operation; + return afs_do_sync_operation(op); } /* diff --git a/fs/afs/fs_operation.c b/fs/afs/fs_operation.c new file mode 100644 index 0000000..2d2dff5 --- /dev/null +++ b/fs/afs/fs_operation.c @@ -0,0 +1,239 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* Fileserver-directed operation handling. + * + * Copyright (C) 2020 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + */ + +#include +#include +#include +#include "internal.h" + +static atomic_t afs_operation_debug_counter; + +/* + * Create an operation against a volume. + */ +struct afs_operation *afs_alloc_operation(struct key *key, struct afs_volume *volume) +{ + struct afs_operation *op; + + _enter(""); + + op = kzalloc(sizeof(*op), GFP_KERNEL); + if (!op) + return ERR_PTR(-ENOMEM); + + if (!key) { + key = afs_request_key(volume->cell); + if (IS_ERR(key)) { + kfree(op); + return ERR_CAST(key); + } + } else { + key_get(key); + } + + op->key = key; + op->volume = afs_get_volume(volume, afs_volume_trace_get_new_op); + op->net = volume->cell->net; + op->cb_v_break = volume->cb_v_break; + op->debug_id = atomic_inc_return(&afs_operation_debug_counter); + op->error = -EDESTADDRREQ; + op->ac.error = SHRT_MAX; + + _leave(" = [op=%08x]", op->debug_id); + return op; +} + +/* + * Lock the vnode(s) being operated upon. + */ +static bool afs_get_io_locks(struct afs_operation *op) +{ + struct afs_vnode *vnode = op->file[0].vnode; + struct afs_vnode *vnode2 = op->file[1].vnode; + + _enter(""); + + if (op->flags & AFS_OPERATION_UNINTR) { + mutex_lock(&vnode->io_lock); + op->flags |= AFS_OPERATION_LOCK_0; + _leave(" = t [1]"); + return true; + } + + if (!vnode2 || !op->file[1].need_io_lock || vnode == vnode2) + vnode2 = NULL; + + if (vnode2 > vnode) + swap(vnode, vnode2); + + if (mutex_lock_interruptible(&vnode->io_lock) < 0) { + op->error = -EINTR; + op->flags |= AFS_OPERATION_STOP; + _leave(" = f [I 0]"); + return false; + } + op->flags |= AFS_OPERATION_LOCK_0; + + if (vnode2) { + if (mutex_lock_interruptible_nested(&vnode2->io_lock, 1) < 0) { + op->error = -EINTR; + op->flags |= AFS_OPERATION_STOP; + mutex_unlock(&vnode->io_lock); + op->flags &= ~AFS_OPERATION_LOCK_0; + _leave(" = f [I 1]"); + return false; + } + op->flags |= AFS_OPERATION_LOCK_1; + } + + _leave(" = t [2]"); + return true; +} + +static void afs_drop_io_locks(struct afs_operation *op) +{ + struct afs_vnode *vnode = op->file[0].vnode; + struct afs_vnode *vnode2 = op->file[1].vnode; + + _enter(""); + + if (op->flags & AFS_OPERATION_LOCK_1) + mutex_unlock(&vnode2->io_lock); + if (op->flags & AFS_OPERATION_LOCK_0) + mutex_unlock(&vnode->io_lock); +} + +static void afs_prepare_vnode(struct afs_operation *op, struct afs_vnode_param *vp, + unsigned int index) +{ + struct afs_vnode *vnode = vp->vnode; + + if (vnode) { + vp->fid = vnode->fid; + vp->dv_before = vnode->status.data_version; + vp->cb_break_before = afs_calc_vnode_cb_break(vnode); + if (vnode->lock_state != AFS_VNODE_LOCK_NONE) + op->flags |= AFS_OPERATION_CUR_ONLY; + } + + if (vp->fid.vnode) + _debug("PREP[%u] {%llx:%llu.%u}", + index, vp->fid.vid, vp->fid.vnode, vp->fid.unique); +} + +/* + * Begin an operation on the fileserver. + * + * Fileserver operations are serialised on the server by vnode, so we serialise + * them here also using the io_lock. + */ +bool afs_begin_vnode_operation(struct afs_operation *op) +{ + struct afs_vnode *vnode = op->file[0].vnode; + + ASSERT(vnode); + + _enter(""); + + if (op->file[0].need_io_lock) + if (!afs_get_io_locks(op)) + return false; + + afs_prepare_vnode(op, &op->file[0], 0); + afs_prepare_vnode(op, &op->file[1], 1); + op->cb_v_break = op->volume->cb_v_break; + _leave(" = true"); + return true; +} + +/* + * Tidy up a filesystem cursor and unlock the vnode. + */ +static void afs_end_vnode_operation(struct afs_operation *op) +{ + _enter(""); + + if (op->error == -EDESTADDRREQ || + op->error == -EADDRNOTAVAIL || + op->error == -ENETUNREACH || + op->error == -EHOSTUNREACH) + afs_dump_edestaddrreq(op); + + afs_drop_io_locks(op); + + if (op->error == -ECONNABORTED) + op->error = afs_abort_to_error(op->ac.abort_code); +} + +/* + * Wait for an in-progress operation to complete. + */ +void afs_wait_for_operation(struct afs_operation *op) +{ + _enter(""); + + while (afs_select_fileserver(op)) { + op->cb_s_break = op->server->cb_s_break; + if (test_bit(AFS_SERVER_FL_IS_YFS, &op->server->flags) && + op->ops->issue_yfs_rpc) + op->ops->issue_yfs_rpc(op); + else + op->ops->issue_afs_rpc(op); + + op->error = afs_wait_for_call_to_complete(op->call, &op->ac); + } + + if (op->error == 0) { + _debug("success"); + op->ops->success(op); + } + + afs_end_vnode_operation(op); + + if (op->error == 0 && op->ops->edit_dir) { + _debug("edit_dir"); + op->ops->edit_dir(op); + } + _leave(""); +} + +/* + * Dispose of an operation. + */ +int afs_put_operation(struct afs_operation *op) +{ + int i, ret = op->error; + + _enter("op=%08x,%d", op->debug_id, ret); + + if (op->ops && op->ops->put) + op->ops->put(op); + if (op->file[0].put_vnode) + iput(&op->file[0].vnode->vfs_inode); + if (op->file[1].put_vnode) + iput(&op->file[1].vnode->vfs_inode); + + if (op->more_files) { + for (i = 0; i < op->nr_files - 2; i++) + if (op->more_files[i].put_vnode) + iput(&op->more_files[i].vnode->vfs_inode); + kfree(op->more_files); + } + + afs_end_cursor(&op->ac); + afs_put_serverlist(op->net, op->server_list); + afs_put_volume(op->net, op->volume, afs_volume_trace_put_put_op); + kfree(op); + return ret; +} + +int afs_do_sync_operation(struct afs_operation *op) +{ + afs_begin_vnode_operation(op); + afs_wait_for_operation(op); + return afs_put_operation(op); +} diff --git a/fs/afs/fs_probe.c b/fs/afs/fs_probe.c index 37d1bba..b34f74b 100644 --- a/fs/afs/fs_probe.c +++ b/fs/afs/fs_probe.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0-or-later /* AFS fileserver probing * - * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved. + * Copyright (C) 2018, 2020 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) */ @@ -11,15 +11,86 @@ #include "internal.h" #include "protocol_yfs.h" -static bool afs_fs_probe_done(struct afs_server *server) +static unsigned int afs_fs_probe_fast_poll_interval = 30 * HZ; +static unsigned int afs_fs_probe_slow_poll_interval = 5 * 60 * HZ; + +/* + * Start the probe polling timer. We have to supply it with an inc on the + * outstanding server count. + */ +static void afs_schedule_fs_probe(struct afs_net *net, + struct afs_server *server, bool fast) +{ + unsigned long atj; + + if (!net->live) + return; + + atj = server->probed_at; + atj += fast ? afs_fs_probe_fast_poll_interval : afs_fs_probe_slow_poll_interval; + + afs_inc_servers_outstanding(net); + if (timer_reduce(&net->fs_probe_timer, atj)) + afs_dec_servers_outstanding(net); +} + +/* + * Handle the completion of a set of probes. + */ +static void afs_finished_fs_probe(struct afs_net *net, struct afs_server *server) +{ + bool responded = server->probe.responded; + + write_seqlock(&net->fs_lock); + if (responded) { + list_add_tail(&server->probe_link, &net->fs_probe_slow); + } else { + server->rtt = UINT_MAX; + clear_bit(AFS_SERVER_FL_RESPONDING, &server->flags); + list_add_tail(&server->probe_link, &net->fs_probe_fast); + } + write_sequnlock(&net->fs_lock); + + afs_schedule_fs_probe(net, server, !responded); +} + +/* + * Handle the completion of a probe. + */ +static void afs_done_one_fs_probe(struct afs_net *net, struct afs_server *server) +{ + _enter(""); + + if (atomic_dec_and_test(&server->probe_outstanding)) + afs_finished_fs_probe(net, server); + + wake_up_all(&server->probe_wq); +} + +/* + * Handle inability to send a probe due to ENOMEM when trying to allocate a + * call struct. + */ +static void afs_fs_probe_not_done(struct afs_net *net, + struct afs_server *server, + struct afs_addr_cursor *ac) { - if (!atomic_dec_and_test(&server->probe_outstanding)) - return false; + struct afs_addr_list *alist = ac->alist; + unsigned int index = ac->index; + + _enter(""); + + trace_afs_io_error(0, -ENOMEM, afs_io_error_fs_probe_fail); + spin_lock(&server->probe_lock); - wake_up_var(&server->probe_outstanding); - clear_bit_unlock(AFS_SERVER_FL_PROBING, &server->flags); - wake_up_bit(&server->flags, AFS_SERVER_FL_PROBING); - return true; + server->probe.local_failure = true; + if (server->probe.error == 0) + server->probe.error = -ENOMEM; + + set_bit(index, &alist->failed); + + spin_unlock(&server->probe_lock); + return afs_done_one_fs_probe(net, server); } /* @@ -30,10 +101,8 @@ void afs_fileserver_probe_result(struct afs_call *call) { struct afs_addr_list *alist = call->alist; struct afs_server *server = call->server; - unsigned int server_index = call->server_index; unsigned int index = call->addr_ix; unsigned int rtt_us = 0; - bool have_result = false; int ret = call->error; _enter("%pU,%u", &server->uuid, index); @@ -52,8 +121,9 @@ void afs_fileserver_probe_result(struct afs_call *call) goto responded; case -ENOMEM: case -ENONET: + clear_bit(index, &alist->responded); server->probe.local_failure = true; - afs_io_error(call, afs_io_error_fs_probe_fail); + trace_afs_io_error(call->debug_id, ret, afs_io_error_fs_probe_fail); goto out; case -ECONNRESET: /* Responded, but call expired. */ case -ERFKILL: @@ -72,12 +142,11 @@ void afs_fileserver_probe_result(struct afs_call *call) server->probe.error == -ETIMEDOUT || server->probe.error == -ETIME)) server->probe.error = ret; - afs_io_error(call, afs_io_error_fs_probe_fail); + trace_afs_io_error(call->debug_id, ret, afs_io_error_fs_probe_fail); goto out; } responded: - set_bit(index, &alist->responded); clear_bit(index, &alist->failed); if (call->service_id == YFS_FS_SERVICE) { @@ -95,39 +164,34 @@ responded: rtt_us = rxrpc_kernel_get_srtt(call->net->socket, call->rxcall); if (rtt_us < server->probe.rtt) { server->probe.rtt = rtt_us; + server->rtt = rtt_us; alist->preferred = index; - have_result = true; } smp_wmb(); /* Set rtt before responded. */ server->probe.responded = true; - set_bit(AFS_SERVER_FL_PROBED, &server->flags); + set_bit(index, &alist->responded); + set_bit(AFS_SERVER_FL_RESPONDING, &server->flags); out: spin_unlock(&server->probe_lock); - _debug("probe [%u][%u] %pISpc rtt=%u ret=%d", - server_index, index, &alist->addrs[index].transport, rtt_us, ret); + _debug("probe %pU [%u] %pISpc rtt=%u ret=%d", + &server->uuid, index, &alist->addrs[index].transport, + rtt_us, ret); - have_result |= afs_fs_probe_done(server); - if (have_result) - wake_up_all(&server->probe_wq); + return afs_done_one_fs_probe(call->net, server); } /* - * Probe all of a fileserver's addresses to find out the best route and to - * query its capabilities. + * Probe one or all of a fileserver's addresses to find out the best route and + * to query its capabilities. */ -static int afs_do_probe_fileserver(struct afs_net *net, - struct afs_server *server, - struct key *key, - unsigned int server_index, - struct afs_error *_e) +void afs_fs_probe_fileserver(struct afs_net *net, struct afs_server *server, + struct key *key, bool all) { struct afs_addr_cursor ac = { .index = 0, }; - struct afs_call *call; - bool in_progress = false; _enter("%pU", &server->uuid); @@ -137,50 +201,25 @@ static int afs_do_probe_fileserver(struct afs_net *net, afs_get_addrlist(ac.alist); read_unlock(&server->fs_lock); - atomic_set(&server->probe_outstanding, ac.alist->nr_addrs); + server->probed_at = jiffies; + atomic_set(&server->probe_outstanding, all ? ac.alist->nr_addrs : 1); memset(&server->probe, 0, sizeof(server->probe)); server->probe.rtt = UINT_MAX; - for (ac.index = 0; ac.index < ac.alist->nr_addrs; ac.index++) { - call = afs_fs_get_capabilities(net, server, &ac, key, server_index); - if (!IS_ERR(call)) { - afs_put_call(call); - in_progress = true; - } else { - afs_prioritise_error(_e, PTR_ERR(call), ac.abort_code); - } - } - - if (!in_progress) - afs_fs_probe_done(server); - afs_put_addrlist(ac.alist); - return in_progress; -} + ac.index = ac.alist->preferred; + if (ac.index < 0 || ac.index >= ac.alist->nr_addrs) + all = true; -/* - * Send off probes to all unprobed servers. - */ -int afs_probe_fileservers(struct afs_net *net, struct key *key, - struct afs_server_list *list) -{ - struct afs_server *server; - struct afs_error e; - bool in_progress = false; - int i; - - e.error = 0; - e.responded = false; - for (i = 0; i < list->nr_servers; i++) { - server = list->servers[i].server; - if (test_bit(AFS_SERVER_FL_PROBED, &server->flags)) - continue; - - if (!test_and_set_bit_lock(AFS_SERVER_FL_PROBING, &server->flags) && - afs_do_probe_fileserver(net, server, key, i, &e)) - in_progress = true; + if (all) { + for (ac.index = 0; ac.index < ac.alist->nr_addrs; ac.index++) + if (!afs_fs_get_capabilities(net, server, &ac, key)) + afs_fs_probe_not_done(net, server, &ac); + } else { + if (!afs_fs_get_capabilities(net, server, &ac, key)) + afs_fs_probe_not_done(net, server, &ac); } - return in_progress ? 0 : e.error; + afs_put_addrlist(ac.alist); } /* @@ -190,7 +229,7 @@ int afs_wait_for_fs_probes(struct afs_server_list *slist, unsigned long untried) { struct wait_queue_entry *waits; struct afs_server *server; - unsigned int rtt = UINT_MAX; + unsigned int rtt = UINT_MAX, rtt_s; bool have_responders = false; int pref = -1, i; @@ -200,7 +239,7 @@ int afs_wait_for_fs_probes(struct afs_server_list *slist, unsigned long untried) for (i = 0; i < slist->nr_servers; i++) { if (test_bit(i, &untried)) { server = slist->servers[i].server; - if (!test_bit(AFS_SERVER_FL_PROBING, &server->flags)) + if (!atomic_read(&server->probe_outstanding)) __clear_bit(i, &untried); if (server->probe.responded) have_responders = true; @@ -230,7 +269,7 @@ int afs_wait_for_fs_probes(struct afs_server_list *slist, unsigned long untried) server = slist->servers[i].server; if (server->probe.responded) goto stop; - if (test_bit(AFS_SERVER_FL_PROBING, &server->flags)) + if (atomic_read(&server->probe_outstanding)) still_probing = true; } } @@ -246,10 +285,11 @@ stop: for (i = 0; i < slist->nr_servers; i++) { if (test_bit(i, &untried)) { server = slist->servers[i].server; - if (server->probe.responded && - server->probe.rtt < rtt) { + rtt_s = READ_ONCE(server->rtt); + if (test_bit(AFS_SERVER_FL_RESPONDING, &server->flags) && + rtt_s < rtt) { pref = i; - rtt = server->probe.rtt; + rtt = rtt_s; } remove_wait_queue(&server->probe_wq, &waits[i]); @@ -265,3 +305,156 @@ stop: slist->preferred = pref; return 0; } + +/* + * Probe timer. We have an increment on fs_outstanding that we need to pass + * along to the work item. + */ +void afs_fs_probe_timer(struct timer_list *timer) +{ + struct afs_net *net = container_of(timer, struct afs_net, fs_probe_timer); + + if (!queue_work(afs_wq, &net->fs_prober)) + afs_dec_servers_outstanding(net); +} + +/* + * Dispatch a probe to a server. + */ +static void afs_dispatch_fs_probe(struct afs_net *net, struct afs_server *server, bool all) + __releases(&net->fs_lock) +{ + struct key *key = NULL; + + /* We remove it from the queues here - it will be added back to + * one of the queues on the completion of the probe. + */ + list_del_init(&server->probe_link); + + afs_get_server(server, afs_server_trace_get_probe); + write_sequnlock(&net->fs_lock); + + afs_fs_probe_fileserver(net, server, key, all); + afs_put_server(net, server, afs_server_trace_put_probe); +} + +/* + * Probe a server immediately without waiting for its due time to come + * round. This is used when all of the addresses have been tried. + */ +void afs_probe_fileserver(struct afs_net *net, struct afs_server *server) +{ + write_seqlock(&net->fs_lock); + if (!list_empty(&server->probe_link)) + return afs_dispatch_fs_probe(net, server, true); + write_sequnlock(&net->fs_lock); +} + +/* + * Probe dispatcher to regularly dispatch probes to keep NAT alive. + */ +void afs_fs_probe_dispatcher(struct work_struct *work) +{ + struct afs_net *net = container_of(work, struct afs_net, fs_prober); + struct afs_server *fast, *slow, *server; + unsigned long nowj, timer_at, poll_at; + bool first_pass = true, set_timer = false; + + if (!net->live) + return; + + _enter(""); + + if (list_empty(&net->fs_probe_fast) && list_empty(&net->fs_probe_slow)) { + _leave(" [none]"); + return; + } + +again: + write_seqlock(&net->fs_lock); + + fast = slow = server = NULL; + nowj = jiffies; + timer_at = nowj + MAX_JIFFY_OFFSET; + + if (!list_empty(&net->fs_probe_fast)) { + fast = list_first_entry(&net->fs_probe_fast, struct afs_server, probe_link); + poll_at = fast->probed_at + afs_fs_probe_fast_poll_interval; + if (time_before(nowj, poll_at)) { + timer_at = poll_at; + set_timer = true; + fast = NULL; + } + } + + if (!list_empty(&net->fs_probe_slow)) { + slow = list_first_entry(&net->fs_probe_slow, struct afs_server, probe_link); + poll_at = slow->probed_at + afs_fs_probe_slow_poll_interval; + if (time_before(nowj, poll_at)) { + if (time_before(poll_at, timer_at)) + timer_at = poll_at; + set_timer = true; + slow = NULL; + } + } + + server = fast ?: slow; + if (server) + _debug("probe %pU", &server->uuid); + + if (server && (first_pass || !need_resched())) { + afs_dispatch_fs_probe(net, server, server == fast); + first_pass = false; + goto again; + } + + write_sequnlock(&net->fs_lock); + + if (server) { + if (!queue_work(afs_wq, &net->fs_prober)) + afs_dec_servers_outstanding(net); + _leave(" [requeue]"); + } else if (set_timer) { + if (timer_reduce(&net->fs_probe_timer, timer_at)) + afs_dec_servers_outstanding(net); + _leave(" [timer]"); + } else { + afs_dec_servers_outstanding(net); + _leave(" [quiesce]"); + } +} + +/* + * Wait for a probe on a particular fileserver to complete for 2s. + */ +int afs_wait_for_one_fs_probe(struct afs_server *server, bool is_intr) +{ + struct wait_queue_entry wait; + unsigned long timo = 2 * HZ; + + if (atomic_read(&server->probe_outstanding) == 0) + goto dont_wait; + + init_wait_entry(&wait, 0); + for (;;) { + prepare_to_wait_event(&server->probe_wq, &wait, + is_intr ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE); + if (timo == 0 || + server->probe.responded || + atomic_read(&server->probe_outstanding) == 0 || + (is_intr && signal_pending(current))) + break; + timo = schedule_timeout(timo); + } + + finish_wait(&server->probe_wq, &wait); + +dont_wait: + if (server->probe.responded) + return 0; + if (is_intr && signal_pending(current)) + return -ERESTARTSYS; + if (timo == 0) + return -ETIME; + return -EDESTADDRREQ; +} diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c index d2b3798..acb4d0c 100644 --- a/fs/afs/fsclient.c +++ b/fs/afs/fsclient.c @@ -13,12 +13,6 @@ #include "internal.h" #include "afs_fs.h" #include "xdr_fs.h" -#include "protocol_yfs.h" - -static inline void afs_use_fs_server(struct afs_call *call, struct afs_cb_interest *cbi) -{ - call->cbi = afs_get_cb_interest(cbi); -} /* * decode an AFSFid block @@ -56,16 +50,15 @@ static void xdr_dump_bad(const __be32 *bp) /* * decode an AFSFetchStatus block */ -static int xdr_decode_AFSFetchStatus(const __be32 **_bp, - struct afs_call *call, - struct afs_status_cb *scb) +static void xdr_decode_AFSFetchStatus(const __be32 **_bp, + struct afs_call *call, + struct afs_status_cb *scb) { const struct afs_xdr_AFSFetchStatus *xdr = (const void *)*_bp; struct afs_file_status *status = &scb->status; bool inline_error = (call->operation_ID == afs_FS_InlineBulkStatus); u64 data_version, size; u32 type, abort_code; - int ret; abort_code = ntohl(xdr->abort_code); @@ -79,7 +72,7 @@ static int xdr_decode_AFSFetchStatus(const __be32 **_bp, */ status->abort_code = abort_code; scb->have_error = true; - goto good; + goto advance; } pr_warn("Unknown AFSFetchStatus version %u\n", ntohl(xdr->if_version)); @@ -89,7 +82,7 @@ static int xdr_decode_AFSFetchStatus(const __be32 **_bp, if (abort_code != 0 && inline_error) { status->abort_code = abort_code; scb->have_error = true; - goto good; + goto advance; } type = ntohl(xdr->type); @@ -125,15 +118,13 @@ static int xdr_decode_AFSFetchStatus(const __be32 **_bp, data_version |= (u64)ntohl(xdr->data_version_hi) << 32; status->data_version = data_version; scb->have_status = true; -good: - ret = 0; advance: *_bp = (const void *)*_bp + sizeof(*xdr); - return ret; + return; bad: xdr_dump_bad(*_bp); - ret = afs_protocol_error(call, -EBADMSG, afs_eproto_bad_status); + afs_protocol_error(call, afs_eproto_bad_status); goto advance; } @@ -243,8 +234,10 @@ static void xdr_decode_AFSFetchVolumeStatus(const __be32 **_bp, /* * deliver reply data to an FS.FetchStatus */ -static int afs_deliver_fs_fetch_status_vnode(struct afs_call *call) +static int afs_deliver_fs_fetch_status(struct afs_call *call) { + struct afs_operation *op = call->op; + struct afs_vnode_param *vp = &op->file[op->fetch_status.which]; const __be32 *bp; int ret; @@ -254,11 +247,9 @@ static int afs_deliver_fs_fetch_status_vnode(struct afs_call *call) /* unmarshall the reply once we've received all of it */ bp = call->buffer; - ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - xdr_decode_AFSCallBack(&bp, call, call->out_scb); - xdr_decode_AFSVolSync(&bp, call->out_volsync); + xdr_decode_AFSFetchStatus(&bp, call, &vp->scb); + xdr_decode_AFSCallBack(&bp, call, &vp->scb); + xdr_decode_AFSVolSync(&bp, &op->volsync); _leave(" = 0 [done]"); return 0; @@ -267,54 +258,39 @@ static int afs_deliver_fs_fetch_status_vnode(struct afs_call *call) /* * FS.FetchStatus operation type */ -static const struct afs_call_type afs_RXFSFetchStatus_vnode = { - .name = "FS.FetchStatus(vnode)", +static const struct afs_call_type afs_RXFSFetchStatus = { + .name = "FS.FetchStatus", .op = afs_FS_FetchStatus, - .deliver = afs_deliver_fs_fetch_status_vnode, + .deliver = afs_deliver_fs_fetch_status, .destructor = afs_flat_call_destructor, }; /* * fetch the status information for a file */ -int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_status_cb *scb, - struct afs_volsync *volsync) +void afs_fs_fetch_status(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[op->fetch_status.which]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); __be32 *bp; - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)) - return yfs_fs_fetch_file_status(fc, scb, volsync); - _enter(",%x,{%llx:%llu},,", - key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode); + key_serial(op->key), vp->fid.vid, vp->fid.vnode); - call = afs_alloc_flat_call(net, &afs_RXFSFetchStatus_vnode, + call = afs_alloc_flat_call(op->net, &afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4); - if (!call) { - fc->ac.error = -ENOMEM; - return -ENOMEM; - } - - call->key = fc->key; - call->out_scb = scb; - call->out_volsync = volsync; + if (!call) + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp[0] = htonl(FSFETCHSTATUS); - bp[1] = htonl(vnode->fid.vid); - bp[2] = htonl(vnode->fid.vnode); - bp[3] = htonl(vnode->fid.unique); + bp[1] = htonl(vp->fid.vid); + bp[2] = htonl(vp->fid.vnode); + bp[3] = htonl(vp->fid.unique); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -322,7 +298,9 @@ int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_status_cb *scb */ static int afs_deliver_fs_fetch_data(struct afs_call *call) { - struct afs_read *req = call->read_request; + struct afs_operation *op = call->op; + struct afs_vnode_param *vp = &op->file[0]; + struct afs_read *req = op->fetch.req; const __be32 *bp; unsigned int size; int ret; @@ -419,14 +397,12 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call) return ret; bp = call->buffer; - ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - xdr_decode_AFSCallBack(&bp, call, call->out_scb); - xdr_decode_AFSVolSync(&bp, call->out_volsync); + xdr_decode_AFSFetchStatus(&bp, call, &vp->scb); + xdr_decode_AFSCallBack(&bp, call, &vp->scb); + xdr_decode_AFSVolSync(&bp, &op->volsync); - req->data_version = call->out_scb->status.data_version; - req->file_size = call->out_scb->status.size; + req->data_version = vp->scb.status.data_version; + req->file_size = vp->scb.status.size; call->unmarshall++; @@ -449,14 +425,6 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call) return 0; } -static void afs_fetch_data_destructor(struct afs_call *call) -{ - struct afs_read *req = call->read_request; - - afs_put_read(req); - afs_flat_call_destructor(call); -} - /* * FS.FetchData operation type */ @@ -464,102 +432,79 @@ static const struct afs_call_type afs_RXFSFetchData = { .name = "FS.FetchData", .op = afs_FS_FetchData, .deliver = afs_deliver_fs_fetch_data, - .destructor = afs_fetch_data_destructor, + .destructor = afs_flat_call_destructor, }; static const struct afs_call_type afs_RXFSFetchData64 = { .name = "FS.FetchData64", .op = afs_FS_FetchData64, .deliver = afs_deliver_fs_fetch_data, - .destructor = afs_fetch_data_destructor, + .destructor = afs_flat_call_destructor, }; /* * fetch data from a very large file */ -static int afs_fs_fetch_data64(struct afs_fs_cursor *fc, - struct afs_status_cb *scb, - struct afs_read *req) +static void afs_fs_fetch_data64(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; + struct afs_read *req = op->fetch.req; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); __be32 *bp; _enter(""); - call = afs_alloc_flat_call(net, &afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4); + call = afs_alloc_flat_call(op->net, &afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_scb = scb; - call->out_volsync = NULL; - call->read_request = afs_get_read(req); + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp[0] = htonl(FSFETCHDATA64); - bp[1] = htonl(vnode->fid.vid); - bp[2] = htonl(vnode->fid.vnode); - bp[3] = htonl(vnode->fid.unique); + bp[1] = htonl(vp->fid.vid); + bp[2] = htonl(vp->fid.vnode); + bp[3] = htonl(vp->fid.unique); bp[4] = htonl(upper_32_bits(req->pos)); bp[5] = htonl(lower_32_bits(req->pos)); bp[6] = 0; bp[7] = htonl(lower_32_bits(req->len)); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* * fetch data from a file */ -int afs_fs_fetch_data(struct afs_fs_cursor *fc, - struct afs_status_cb *scb, - struct afs_read *req) +void afs_fs_fetch_data(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); + struct afs_read *req = op->fetch.req; __be32 *bp; - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)) - return yfs_fs_fetch_data(fc, scb, req); - if (upper_32_bits(req->pos) || upper_32_bits(req->len) || upper_32_bits(req->pos + req->len)) - return afs_fs_fetch_data64(fc, scb, req); + return afs_fs_fetch_data64(op); _enter(""); - call = afs_alloc_flat_call(net, &afs_RXFSFetchData, 24, (21 + 3 + 6) * 4); + call = afs_alloc_flat_call(op->net, &afs_RXFSFetchData, 24, (21 + 3 + 6) * 4); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_scb = scb; - call->out_volsync = NULL; - call->read_request = afs_get_read(req); + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp[0] = htonl(FSFETCHDATA); - bp[1] = htonl(vnode->fid.vid); - bp[2] = htonl(vnode->fid.vnode); - bp[3] = htonl(vnode->fid.unique); + bp[1] = htonl(vp->fid.vid); + bp[2] = htonl(vp->fid.vnode); + bp[3] = htonl(vp->fid.unique); bp[4] = htonl(lower_32_bits(req->pos)); bp[5] = htonl(lower_32_bits(req->len)); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -567,6 +512,9 @@ int afs_fs_fetch_data(struct afs_fs_cursor *fc, */ static int afs_deliver_fs_create_vnode(struct afs_call *call) { + struct afs_operation *op = call->op; + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode_param *vp = &op->file[1]; const __be32 *bp; int ret; @@ -576,15 +524,11 @@ static int afs_deliver_fs_create_vnode(struct afs_call *call) /* unmarshall the reply once we've received all of it */ bp = call->buffer; - xdr_decode_AFSFid(&bp, call->out_fid); - ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb); - if (ret < 0) - return ret; - xdr_decode_AFSCallBack(&bp, call, call->out_scb); - xdr_decode_AFSVolSync(&bp, call->out_volsync); + xdr_decode_AFSFid(&bp, &op->file[1].fid); + xdr_decode_AFSFetchStatus(&bp, call, &vp->scb); + xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb); + xdr_decode_AFSCallBack(&bp, call, &vp->scb); + xdr_decode_AFSVolSync(&bp, &op->volsync); _leave(" = 0 [done]"); return 0; @@ -600,6 +544,52 @@ static const struct afs_call_type afs_RXFSCreateFile = { .destructor = afs_flat_call_destructor, }; +/* + * Create a file. + */ +void afs_fs_create_file(struct afs_operation *op) +{ + const struct qstr *name = &op->dentry->d_name; + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_call *call; + size_t namesz, reqsz, padsz; + __be32 *bp; + + _enter(""); + + namesz = name->len; + padsz = (4 - (namesz & 3)) & 3; + reqsz = (5 * 4) + namesz + padsz + (6 * 4); + + call = afs_alloc_flat_call(op->net, &afs_RXFSCreateFile, + reqsz, (3 + 21 + 21 + 3 + 6) * 4); + if (!call) + return afs_op_nomem(op); + + /* marshall the parameters */ + bp = call->request; + *bp++ = htonl(FSCREATEFILE); + *bp++ = htonl(dvp->fid.vid); + *bp++ = htonl(dvp->fid.vnode); + *bp++ = htonl(dvp->fid.unique); + *bp++ = htonl(namesz); + memcpy(bp, name->name, namesz); + bp = (void *) bp + namesz; + if (padsz > 0) { + memset(bp, 0, padsz); + bp = (void *) bp + padsz; + } + *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME); + *bp++ = htonl(op->mtime.tv_sec); /* mtime */ + *bp++ = 0; /* owner */ + *bp++ = 0; /* group */ + *bp++ = htonl(op->create.mode & S_IALLUGO); /* unix mode */ + *bp++ = 0; /* segment size */ + + trace_afs_make_fs_call1(call, &dvp->fid, name); + afs_make_op_call(op, call, GFP_NOFS); +} + static const struct afs_call_type afs_RXFSMakeDir = { .name = "FS.MakeDir", .op = afs_FS_MakeDir, @@ -608,80 +598,58 @@ static const struct afs_call_type afs_RXFSMakeDir = { }; /* - * create a file or make a directory + * Create a new directory */ -int afs_fs_create(struct afs_fs_cursor *fc, - const char *name, - umode_t mode, - struct afs_status_cb *dvnode_scb, - struct afs_fid *newfid, - struct afs_status_cb *new_scb) +void afs_fs_make_dir(struct afs_operation *op) { - struct afs_vnode *dvnode = fc->vnode; + const struct qstr *name = &op->dentry->d_name; + struct afs_vnode_param *dvp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(dvnode); size_t namesz, reqsz, padsz; __be32 *bp; - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)){ - if (S_ISDIR(mode)) - return yfs_fs_make_dir(fc, name, mode, dvnode_scb, - newfid, new_scb); - else - return yfs_fs_create_file(fc, name, mode, dvnode_scb, - newfid, new_scb); - } - _enter(""); - namesz = strlen(name); + namesz = name->len; padsz = (4 - (namesz & 3)) & 3; reqsz = (5 * 4) + namesz + padsz + (6 * 4); - call = afs_alloc_flat_call( - net, S_ISDIR(mode) ? &afs_RXFSMakeDir : &afs_RXFSCreateFile, - reqsz, (3 + 21 + 21 + 3 + 6) * 4); + call = afs_alloc_flat_call(op->net, &afs_RXFSMakeDir, + reqsz, (3 + 21 + 21 + 3 + 6) * 4); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_dir_scb = dvnode_scb; - call->out_fid = newfid; - call->out_scb = new_scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; - *bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE); - *bp++ = htonl(dvnode->fid.vid); - *bp++ = htonl(dvnode->fid.vnode); - *bp++ = htonl(dvnode->fid.unique); + *bp++ = htonl(FSMAKEDIR); + *bp++ = htonl(dvp->fid.vid); + *bp++ = htonl(dvp->fid.vnode); + *bp++ = htonl(dvp->fid.unique); *bp++ = htonl(namesz); - memcpy(bp, name, namesz); + memcpy(bp, name->name, namesz); bp = (void *) bp + namesz; if (padsz > 0) { memset(bp, 0, padsz); bp = (void *) bp + padsz; } *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME); - *bp++ = htonl(dvnode->vfs_inode.i_mtime.tv_sec); /* mtime */ + *bp++ = htonl(op->mtime.tv_sec); /* mtime */ *bp++ = 0; /* owner */ *bp++ = 0; /* group */ - *bp++ = htonl(mode & S_IALLUGO); /* unix mode */ + *bp++ = htonl(op->create.mode & S_IALLUGO); /* unix mode */ *bp++ = 0; /* segment size */ - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call1(call, &dvnode->fid, name); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call1(call, &dvp->fid, name); + afs_make_op_call(op, call, GFP_NOFS); } /* - * Deliver reply data to any operation that returns directory status and volume - * sync. + * Deliver reply data to any operation that returns status and volume sync. */ -static int afs_deliver_fs_dir_status_and_vol(struct afs_call *call) +static int afs_deliver_fs_file_status_and_vol(struct afs_call *call) { + struct afs_operation *op = call->op; + struct afs_vnode_param *vp = &op->file[0]; const __be32 *bp; int ret; @@ -691,81 +659,108 @@ static int afs_deliver_fs_dir_status_and_vol(struct afs_call *call) /* unmarshall the reply once we've received all of it */ bp = call->buffer; - ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb); - if (ret < 0) - return ret; - xdr_decode_AFSVolSync(&bp, call->out_volsync); + xdr_decode_AFSFetchStatus(&bp, call, &vp->scb); + xdr_decode_AFSVolSync(&bp, &op->volsync); _leave(" = 0 [done]"); return 0; } /* - * FS.RemoveDir/FS.RemoveFile operation type + * FS.RemoveFile operation type */ static const struct afs_call_type afs_RXFSRemoveFile = { .name = "FS.RemoveFile", .op = afs_FS_RemoveFile, - .deliver = afs_deliver_fs_dir_status_and_vol, + .deliver = afs_deliver_fs_file_status_and_vol, .destructor = afs_flat_call_destructor, }; +/* + * Remove a file. + */ +void afs_fs_remove_file(struct afs_operation *op) +{ + const struct qstr *name = &op->dentry->d_name; + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_call *call; + size_t namesz, reqsz, padsz; + __be32 *bp; + + _enter(""); + + namesz = name->len; + padsz = (4 - (namesz & 3)) & 3; + reqsz = (5 * 4) + namesz + padsz; + + call = afs_alloc_flat_call(op->net, &afs_RXFSRemoveFile, + reqsz, (21 + 6) * 4); + if (!call) + return afs_op_nomem(op); + + /* marshall the parameters */ + bp = call->request; + *bp++ = htonl(FSREMOVEFILE); + *bp++ = htonl(dvp->fid.vid); + *bp++ = htonl(dvp->fid.vnode); + *bp++ = htonl(dvp->fid.unique); + *bp++ = htonl(namesz); + memcpy(bp, name->name, namesz); + bp = (void *) bp + namesz; + if (padsz > 0) { + memset(bp, 0, padsz); + bp = (void *) bp + padsz; + } + + trace_afs_make_fs_call1(call, &dvp->fid, name); + afs_make_op_call(op, call, GFP_NOFS); +} + static const struct afs_call_type afs_RXFSRemoveDir = { .name = "FS.RemoveDir", .op = afs_FS_RemoveDir, - .deliver = afs_deliver_fs_dir_status_and_vol, + .deliver = afs_deliver_fs_file_status_and_vol, .destructor = afs_flat_call_destructor, }; /* - * remove a file or directory + * Remove a directory. */ -int afs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode, - const char *name, bool isdir, struct afs_status_cb *dvnode_scb) +void afs_fs_remove_dir(struct afs_operation *op) { - struct afs_vnode *dvnode = fc->vnode; + const struct qstr *name = &op->dentry->d_name; + struct afs_vnode_param *dvp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(dvnode); size_t namesz, reqsz, padsz; __be32 *bp; - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)) - return yfs_fs_remove(fc, vnode, name, isdir, dvnode_scb); - _enter(""); - namesz = strlen(name); + namesz = name->len; padsz = (4 - (namesz & 3)) & 3; reqsz = (5 * 4) + namesz + padsz; - call = afs_alloc_flat_call( - net, isdir ? &afs_RXFSRemoveDir : &afs_RXFSRemoveFile, - reqsz, (21 + 6) * 4); + call = afs_alloc_flat_call(op->net, &afs_RXFSRemoveDir, + reqsz, (21 + 6) * 4); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_dir_scb = dvnode_scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; - *bp++ = htonl(isdir ? FSREMOVEDIR : FSREMOVEFILE); - *bp++ = htonl(dvnode->fid.vid); - *bp++ = htonl(dvnode->fid.vnode); - *bp++ = htonl(dvnode->fid.unique); + *bp++ = htonl(FSREMOVEDIR); + *bp++ = htonl(dvp->fid.vid); + *bp++ = htonl(dvp->fid.vnode); + *bp++ = htonl(dvp->fid.unique); *bp++ = htonl(namesz); - memcpy(bp, name, namesz); + memcpy(bp, name->name, namesz); bp = (void *) bp + namesz; if (padsz > 0) { memset(bp, 0, padsz); bp = (void *) bp + padsz; } - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call1(call, &dvnode->fid, name); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call1(call, &dvp->fid, name); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -773,6 +768,9 @@ int afs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode, */ static int afs_deliver_fs_link(struct afs_call *call) { + struct afs_operation *op = call->op; + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode_param *vp = &op->file[1]; const __be32 *bp; int ret; @@ -784,13 +782,9 @@ static int afs_deliver_fs_link(struct afs_call *call) /* unmarshall the reply once we've received all of it */ bp = call->buffer; - ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb); - if (ret < 0) - return ret; - xdr_decode_AFSVolSync(&bp, call->out_volsync); + xdr_decode_AFSFetchStatus(&bp, call, &vp->scb); + xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb); + xdr_decode_AFSVolSync(&bp, &op->volsync); _leave(" = 0 [done]"); return 0; @@ -809,56 +803,44 @@ static const struct afs_call_type afs_RXFSLink = { /* * make a hard link */ -int afs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode, - const char *name, - struct afs_status_cb *dvnode_scb, - struct afs_status_cb *vnode_scb) +void afs_fs_link(struct afs_operation *op) { - struct afs_vnode *dvnode = fc->vnode; + const struct qstr *name = &op->dentry->d_name; + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode_param *vp = &op->file[1]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); size_t namesz, reqsz, padsz; __be32 *bp; - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)) - return yfs_fs_link(fc, vnode, name, dvnode_scb, vnode_scb); - _enter(""); - namesz = strlen(name); + namesz = name->len; padsz = (4 - (namesz & 3)) & 3; reqsz = (5 * 4) + namesz + padsz + (3 * 4); - call = afs_alloc_flat_call(net, &afs_RXFSLink, reqsz, (21 + 21 + 6) * 4); + call = afs_alloc_flat_call(op->net, &afs_RXFSLink, reqsz, (21 + 21 + 6) * 4); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_dir_scb = dvnode_scb; - call->out_scb = vnode_scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; *bp++ = htonl(FSLINK); - *bp++ = htonl(dvnode->fid.vid); - *bp++ = htonl(dvnode->fid.vnode); - *bp++ = htonl(dvnode->fid.unique); + *bp++ = htonl(dvp->fid.vid); + *bp++ = htonl(dvp->fid.vnode); + *bp++ = htonl(dvp->fid.unique); *bp++ = htonl(namesz); - memcpy(bp, name, namesz); + memcpy(bp, name->name, namesz); bp = (void *) bp + namesz; if (padsz > 0) { memset(bp, 0, padsz); bp = (void *) bp + padsz; } - *bp++ = htonl(vnode->fid.vid); - *bp++ = htonl(vnode->fid.vnode); - *bp++ = htonl(vnode->fid.unique); - - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call1(call, &vnode->fid, name); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + *bp++ = htonl(vp->fid.vid); + *bp++ = htonl(vp->fid.vnode); + *bp++ = htonl(vp->fid.unique); + + trace_afs_make_fs_call1(call, &vp->fid, name); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -866,6 +848,9 @@ int afs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode, */ static int afs_deliver_fs_symlink(struct afs_call *call) { + struct afs_operation *op = call->op; + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode_param *vp = &op->file[1]; const __be32 *bp; int ret; @@ -877,14 +862,10 @@ static int afs_deliver_fs_symlink(struct afs_call *call) /* unmarshall the reply once we've received all of it */ bp = call->buffer; - xdr_decode_AFSFid(&bp, call->out_fid); - ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb); - if (ret < 0) - return ret; - xdr_decode_AFSVolSync(&bp, call->out_volsync); + xdr_decode_AFSFid(&bp, &vp->fid); + xdr_decode_AFSFetchStatus(&bp, call, &vp->scb); + xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb); + xdr_decode_AFSVolSync(&bp, &op->volsync); _leave(" = 0 [done]"); return 0; @@ -903,75 +884,58 @@ static const struct afs_call_type afs_RXFSSymlink = { /* * create a symbolic link */ -int afs_fs_symlink(struct afs_fs_cursor *fc, - const char *name, - const char *contents, - struct afs_status_cb *dvnode_scb, - struct afs_fid *newfid, - struct afs_status_cb *new_scb) +void afs_fs_symlink(struct afs_operation *op) { - struct afs_vnode *dvnode = fc->vnode; + const struct qstr *name = &op->dentry->d_name; + struct afs_vnode_param *dvp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(dvnode); size_t namesz, reqsz, padsz, c_namesz, c_padsz; __be32 *bp; - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)) - return yfs_fs_symlink(fc, name, contents, dvnode_scb, - newfid, new_scb); - _enter(""); - namesz = strlen(name); + namesz = name->len; padsz = (4 - (namesz & 3)) & 3; - c_namesz = strlen(contents); + c_namesz = strlen(op->create.symlink); c_padsz = (4 - (c_namesz & 3)) & 3; reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4); - call = afs_alloc_flat_call(net, &afs_RXFSSymlink, reqsz, + call = afs_alloc_flat_call(op->net, &afs_RXFSSymlink, reqsz, (3 + 21 + 21 + 6) * 4); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_dir_scb = dvnode_scb; - call->out_fid = newfid; - call->out_scb = new_scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; *bp++ = htonl(FSSYMLINK); - *bp++ = htonl(dvnode->fid.vid); - *bp++ = htonl(dvnode->fid.vnode); - *bp++ = htonl(dvnode->fid.unique); + *bp++ = htonl(dvp->fid.vid); + *bp++ = htonl(dvp->fid.vnode); + *bp++ = htonl(dvp->fid.unique); *bp++ = htonl(namesz); - memcpy(bp, name, namesz); + memcpy(bp, name->name, namesz); bp = (void *) bp + namesz; if (padsz > 0) { memset(bp, 0, padsz); bp = (void *) bp + padsz; } *bp++ = htonl(c_namesz); - memcpy(bp, contents, c_namesz); + memcpy(bp, op->create.symlink, c_namesz); bp = (void *) bp + c_namesz; if (c_padsz > 0) { memset(bp, 0, c_padsz); bp = (void *) bp + c_padsz; } *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME); - *bp++ = htonl(dvnode->vfs_inode.i_mtime.tv_sec); /* mtime */ + *bp++ = htonl(op->mtime.tv_sec); /* mtime */ *bp++ = 0; /* owner */ *bp++ = 0; /* group */ *bp++ = htonl(S_IRWXUGO); /* unix mode */ *bp++ = 0; /* segment size */ - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call1(call, &dvnode->fid, name); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call1(call, &dvp->fid, name); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -979,6 +943,9 @@ int afs_fs_symlink(struct afs_fs_cursor *fc, */ static int afs_deliver_fs_rename(struct afs_call *call) { + struct afs_operation *op = call->op; + struct afs_vnode_param *orig_dvp = &op->file[0]; + struct afs_vnode_param *new_dvp = &op->file[1]; const __be32 *bp; int ret; @@ -986,17 +953,13 @@ static int afs_deliver_fs_rename(struct afs_call *call) if (ret < 0) return ret; + bp = call->buffer; /* If the two dirs are the same, we have two copies of the same status * report, so we just decode it twice. */ - bp = call->buffer; - ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb); - if (ret < 0) - return ret; - ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - xdr_decode_AFSVolSync(&bp, call->out_volsync); + xdr_decode_AFSFetchStatus(&bp, call, &orig_dvp->scb); + xdr_decode_AFSFetchStatus(&bp, call, &new_dvp->scb); + xdr_decode_AFSVolSync(&bp, &op->volsync); _leave(" = 0 [done]"); return 0; @@ -1015,31 +978,22 @@ static const struct afs_call_type afs_RXFSRename = { /* * Rename/move a file or directory. */ -int afs_fs_rename(struct afs_fs_cursor *fc, - const char *orig_name, - struct afs_vnode *new_dvnode, - const char *new_name, - struct afs_status_cb *orig_dvnode_scb, - struct afs_status_cb *new_dvnode_scb) +void afs_fs_rename(struct afs_operation *op) { - struct afs_vnode *orig_dvnode = fc->vnode; + struct afs_vnode_param *orig_dvp = &op->file[0]; + struct afs_vnode_param *new_dvp = &op->file[1]; + const struct qstr *orig_name = &op->dentry->d_name; + const struct qstr *new_name = &op->dentry_2->d_name; struct afs_call *call; - struct afs_net *net = afs_v2net(orig_dvnode); size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz; __be32 *bp; - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)) - return yfs_fs_rename(fc, orig_name, - new_dvnode, new_name, - orig_dvnode_scb, - new_dvnode_scb); - _enter(""); - o_namesz = strlen(orig_name); + o_namesz = orig_name->len; o_padsz = (4 - (o_namesz & 3)) & 3; - n_namesz = strlen(new_name); + n_namesz = new_name->len; n_padsz = (4 - (n_namesz & 3)) & 3; reqsz = (4 * 4) + @@ -1047,51 +1001,46 @@ int afs_fs_rename(struct afs_fs_cursor *fc, (3 * 4) + 4 + n_namesz + n_padsz; - call = afs_alloc_flat_call(net, &afs_RXFSRename, reqsz, (21 + 21 + 6) * 4); + call = afs_alloc_flat_call(op->net, &afs_RXFSRename, reqsz, (21 + 21 + 6) * 4); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_dir_scb = orig_dvnode_scb; - call->out_scb = new_dvnode_scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; *bp++ = htonl(FSRENAME); - *bp++ = htonl(orig_dvnode->fid.vid); - *bp++ = htonl(orig_dvnode->fid.vnode); - *bp++ = htonl(orig_dvnode->fid.unique); + *bp++ = htonl(orig_dvp->fid.vid); + *bp++ = htonl(orig_dvp->fid.vnode); + *bp++ = htonl(orig_dvp->fid.unique); *bp++ = htonl(o_namesz); - memcpy(bp, orig_name, o_namesz); + memcpy(bp, orig_name->name, o_namesz); bp = (void *) bp + o_namesz; if (o_padsz > 0) { memset(bp, 0, o_padsz); bp = (void *) bp + o_padsz; } - *bp++ = htonl(new_dvnode->fid.vid); - *bp++ = htonl(new_dvnode->fid.vnode); - *bp++ = htonl(new_dvnode->fid.unique); + *bp++ = htonl(new_dvp->fid.vid); + *bp++ = htonl(new_dvp->fid.vnode); + *bp++ = htonl(new_dvp->fid.unique); *bp++ = htonl(n_namesz); - memcpy(bp, new_name, n_namesz); + memcpy(bp, new_name->name, n_namesz); bp = (void *) bp + n_namesz; if (n_padsz > 0) { memset(bp, 0, n_padsz); bp = (void *) bp + n_padsz; } - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call2(call, &orig_dvnode->fid, orig_name, new_name); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call2(call, &orig_dvp->fid, orig_name, new_name); + afs_make_op_call(op, call, GFP_NOFS); } /* - * deliver reply data to an FS.StoreData + * Deliver reply data to FS.StoreData or FS.StoreStatus */ static int afs_deliver_fs_store_data(struct afs_call *call) { + struct afs_operation *op = call->op; + struct afs_vnode_param *vp = &op->file[0]; const __be32 *bp; int ret; @@ -1103,10 +1052,8 @@ static int afs_deliver_fs_store_data(struct afs_call *call) /* unmarshall the reply once we've received all of it */ bp = call->buffer; - ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - xdr_decode_AFSVolSync(&bp, call->out_volsync); + xdr_decode_AFSFetchStatus(&bp, call, &vp->scb); + xdr_decode_AFSVolSync(&bp, &op->volsync); _leave(" = 0 [done]"); return 0; @@ -1132,90 +1079,69 @@ static const struct afs_call_type afs_RXFSStoreData64 = { /* * store a set of pages to a very large file */ -static int afs_fs_store_data64(struct afs_fs_cursor *fc, - struct address_space *mapping, - pgoff_t first, pgoff_t last, - unsigned offset, unsigned to, - loff_t size, loff_t pos, loff_t i_size, - struct afs_status_cb *scb) +static void afs_fs_store_data64(struct afs_operation *op, + loff_t pos, loff_t size, loff_t i_size) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); __be32 *bp; _enter(",%x,{%llx:%llu},,", - key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode); + key_serial(op->key), vp->fid.vid, vp->fid.vnode); - call = afs_alloc_flat_call(net, &afs_RXFSStoreData64, + call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData64, (4 + 6 + 3 * 2) * 4, (21 + 6) * 4); if (!call) - return -ENOMEM; + return afs_op_nomem(op); - call->key = fc->key; - call->mapping = mapping; - call->first = first; - call->last = last; - call->first_offset = offset; - call->last_to = to; call->send_pages = true; - call->out_scb = scb; /* marshall the parameters */ bp = call->request; *bp++ = htonl(FSSTOREDATA64); - *bp++ = htonl(vnode->fid.vid); - *bp++ = htonl(vnode->fid.vnode); - *bp++ = htonl(vnode->fid.unique); + *bp++ = htonl(vp->fid.vid); + *bp++ = htonl(vp->fid.vnode); + *bp++ = htonl(vp->fid.unique); *bp++ = htonl(AFS_SET_MTIME); /* mask */ - *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */ + *bp++ = htonl(op->mtime.tv_sec); /* mtime */ *bp++ = 0; /* owner */ *bp++ = 0; /* group */ *bp++ = 0; /* unix mode */ *bp++ = 0; /* segment size */ - *bp++ = htonl(pos >> 32); - *bp++ = htonl((u32) pos); - *bp++ = htonl(size >> 32); - *bp++ = htonl((u32) size); - *bp++ = htonl(i_size >> 32); - *bp++ = htonl((u32) i_size); - - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + *bp++ = htonl(upper_32_bits(pos)); + *bp++ = htonl(lower_32_bits(pos)); + *bp++ = htonl(upper_32_bits(size)); + *bp++ = htonl(lower_32_bits(size)); + *bp++ = htonl(upper_32_bits(i_size)); + *bp++ = htonl(lower_32_bits(i_size)); + + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* * store a set of pages */ -int afs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping, - pgoff_t first, pgoff_t last, - unsigned offset, unsigned to, - struct afs_status_cb *scb) +void afs_fs_store_data(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); loff_t size, pos, i_size; __be32 *bp; - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)) - return yfs_fs_store_data(fc, mapping, first, last, offset, to, scb); - _enter(",%x,{%llx:%llu},,", - key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode); + key_serial(op->key), vp->fid.vid, vp->fid.vnode); - size = (loff_t)to - (loff_t)offset; - if (first != last) - size += (loff_t)(last - first) << PAGE_SHIFT; - pos = (loff_t)first << PAGE_SHIFT; - pos += offset; + size = (loff_t)op->store.last_to - (loff_t)op->store.first_offset; + if (op->store.first != op->store.last) + size += (loff_t)(op->store.last - op->store.first) << PAGE_SHIFT; + pos = (loff_t)op->store.first << PAGE_SHIFT; + pos += op->store.first_offset; - i_size = i_size_read(&vnode->vfs_inode); + i_size = i_size_read(&vp->vnode->vfs_inode); if (pos + size > i_size) i_size = size + pos; @@ -1223,73 +1149,38 @@ int afs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping, (unsigned long long) size, (unsigned long long) pos, (unsigned long long) i_size); - if (pos >> 32 || i_size >> 32 || size >> 32 || (pos + size) >> 32) - return afs_fs_store_data64(fc, mapping, first, last, offset, to, - size, pos, i_size, scb); + if (upper_32_bits(pos) || upper_32_bits(i_size) || upper_32_bits(size) || + upper_32_bits(pos + size)) + return afs_fs_store_data64(op, pos, size, i_size); - call = afs_alloc_flat_call(net, &afs_RXFSStoreData, + call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData, (4 + 6 + 3) * 4, (21 + 6) * 4); if (!call) - return -ENOMEM; + return afs_op_nomem(op); - call->key = fc->key; - call->mapping = mapping; - call->first = first; - call->last = last; - call->first_offset = offset; - call->last_to = to; call->send_pages = true; - call->out_scb = scb; /* marshall the parameters */ bp = call->request; *bp++ = htonl(FSSTOREDATA); - *bp++ = htonl(vnode->fid.vid); - *bp++ = htonl(vnode->fid.vnode); - *bp++ = htonl(vnode->fid.unique); + *bp++ = htonl(vp->fid.vid); + *bp++ = htonl(vp->fid.vnode); + *bp++ = htonl(vp->fid.unique); *bp++ = htonl(AFS_SET_MTIME); /* mask */ - *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */ + *bp++ = htonl(op->mtime.tv_sec); /* mtime */ *bp++ = 0; /* owner */ *bp++ = 0; /* group */ *bp++ = 0; /* unix mode */ *bp++ = 0; /* segment size */ - *bp++ = htonl(pos); - *bp++ = htonl(size); - *bp++ = htonl(i_size); - - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); -} - -/* - * deliver reply data to an FS.StoreStatus - */ -static int afs_deliver_fs_store_status(struct afs_call *call) -{ - const __be32 *bp; - int ret; - - _enter(""); + *bp++ = htonl(lower_32_bits(pos)); + *bp++ = htonl(lower_32_bits(size)); + *bp++ = htonl(lower_32_bits(i_size)); - ret = afs_transfer_reply(call); - if (ret < 0) - return ret; - - /* unmarshall the reply once we've received all of it */ - bp = call->buffer; - ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - xdr_decode_AFSVolSync(&bp, call->out_volsync); - - _leave(" = 0 [done]"); - return 0; + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -1298,21 +1189,21 @@ static int afs_deliver_fs_store_status(struct afs_call *call) static const struct afs_call_type afs_RXFSStoreStatus = { .name = "FS.StoreStatus", .op = afs_FS_StoreStatus, - .deliver = afs_deliver_fs_store_status, + .deliver = afs_deliver_fs_store_data, .destructor = afs_flat_call_destructor, }; static const struct afs_call_type afs_RXFSStoreData_as_Status = { .name = "FS.StoreData", .op = afs_FS_StoreData, - .deliver = afs_deliver_fs_store_status, + .deliver = afs_deliver_fs_store_data, .destructor = afs_flat_call_destructor, }; static const struct afs_call_type afs_RXFSStoreData64_as_Status = { .name = "FS.StoreData64", .op = afs_FS_StoreData64, - .deliver = afs_deliver_fs_store_status, + .deliver = afs_deliver_fs_store_data, .destructor = afs_flat_call_destructor, }; @@ -1320,85 +1211,74 @@ static const struct afs_call_type afs_RXFSStoreData64_as_Status = { * set the attributes on a very large file, using FS.StoreData rather than * FS.StoreStatus so as to alter the file size also */ -static int afs_fs_setattr_size64(struct afs_fs_cursor *fc, struct iattr *attr, - struct afs_status_cb *scb) +static void afs_fs_setattr_size64(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); + struct iattr *attr = op->setattr.attr; __be32 *bp; _enter(",%x,{%llx:%llu},,", - key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode); + key_serial(op->key), vp->fid.vid, vp->fid.vnode); ASSERT(attr->ia_valid & ATTR_SIZE); - call = afs_alloc_flat_call(net, &afs_RXFSStoreData64_as_Status, + call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData64_as_Status, (4 + 6 + 3 * 2) * 4, (21 + 6) * 4); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_scb = scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; *bp++ = htonl(FSSTOREDATA64); - *bp++ = htonl(vnode->fid.vid); - *bp++ = htonl(vnode->fid.vnode); - *bp++ = htonl(vnode->fid.unique); + *bp++ = htonl(vp->fid.vid); + *bp++ = htonl(vp->fid.vnode); + *bp++ = htonl(vp->fid.unique); xdr_encode_AFS_StoreStatus(&bp, attr); - *bp++ = htonl(attr->ia_size >> 32); /* position of start of write */ - *bp++ = htonl((u32) attr->ia_size); - *bp++ = 0; /* size of write */ + *bp++ = htonl(upper_32_bits(attr->ia_size)); /* position of start of write */ + *bp++ = htonl(lower_32_bits(attr->ia_size)); + *bp++ = 0; /* size of write */ *bp++ = 0; - *bp++ = htonl(attr->ia_size >> 32); /* new file length */ - *bp++ = htonl((u32) attr->ia_size); - - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + *bp++ = htonl(upper_32_bits(attr->ia_size)); /* new file length */ + *bp++ = htonl(lower_32_bits(attr->ia_size)); + + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus * so as to alter the file size also */ -static int afs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr, - struct afs_status_cb *scb) +static void afs_fs_setattr_size(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); + struct iattr *attr = op->setattr.attr; __be32 *bp; _enter(",%x,{%llx:%llu},,", - key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode); + key_serial(op->key), vp->fid.vid, vp->fid.vnode); ASSERT(attr->ia_valid & ATTR_SIZE); - if (attr->ia_size >> 32) - return afs_fs_setattr_size64(fc, attr, scb); + if (upper_32_bits(attr->ia_size)) + return afs_fs_setattr_size64(op); - call = afs_alloc_flat_call(net, &afs_RXFSStoreData_as_Status, + call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData_as_Status, (4 + 6 + 3) * 4, (21 + 6) * 4); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_scb = scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; *bp++ = htonl(FSSTOREDATA); - *bp++ = htonl(vnode->fid.vid); - *bp++ = htonl(vnode->fid.vnode); - *bp++ = htonl(vnode->fid.unique); + *bp++ = htonl(vp->fid.vid); + *bp++ = htonl(vp->fid.vnode); + *bp++ = htonl(vp->fid.unique); xdr_encode_AFS_StoreStatus(&bp, attr); @@ -1406,57 +1286,44 @@ static int afs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr, *bp++ = 0; /* size of write */ *bp++ = htonl(attr->ia_size); /* new file length */ - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* * set the attributes on a file, using FS.StoreData if there's a change in file * size, and FS.StoreStatus otherwise */ -int afs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr, - struct afs_status_cb *scb) +void afs_fs_setattr(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); + struct iattr *attr = op->setattr.attr; __be32 *bp; - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)) - return yfs_fs_setattr(fc, attr, scb); - if (attr->ia_valid & ATTR_SIZE) - return afs_fs_setattr_size(fc, attr, scb); + return afs_fs_setattr_size(op); _enter(",%x,{%llx:%llu},,", - key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode); + key_serial(op->key), vp->fid.vid, vp->fid.vnode); - call = afs_alloc_flat_call(net, &afs_RXFSStoreStatus, + call = afs_alloc_flat_call(op->net, &afs_RXFSStoreStatus, (4 + 6) * 4, (21 + 6) * 4); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_scb = scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; *bp++ = htonl(FSSTORESTATUS); - *bp++ = htonl(vnode->fid.vid); - *bp++ = htonl(vnode->fid.vnode); - *bp++ = htonl(vnode->fid.unique); + *bp++ = htonl(vp->fid.vid); + *bp++ = htonl(vp->fid.vnode); + *bp++ = htonl(vp->fid.unique); - xdr_encode_AFS_StoreStatus(&bp, attr); + xdr_encode_AFS_StoreStatus(&bp, op->setattr.attr); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -1464,6 +1331,7 @@ int afs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr, */ static int afs_deliver_fs_get_volume_status(struct afs_call *call) { + struct afs_operation *op = call->op; const __be32 *bp; char *p; u32 size; @@ -1485,7 +1353,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call) return ret; bp = call->buffer; - xdr_decode_AFSFetchVolumeStatus(&bp, call->out_volstatus); + xdr_decode_AFSFetchVolumeStatus(&bp, &op->volstatus.vs); call->unmarshall++; afs_extract_to_tmp(call); /* Fall through */ @@ -1499,8 +1367,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call) call->count = ntohl(call->tmp); _debug("volname length: %u", call->count); if (call->count >= AFSNAMEMAX) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_volname_len); + return afs_protocol_error(call, afs_eproto_volname_len); size = (call->count + 3) & ~3; /* It's padded */ afs_extract_to_buf(call, size); call->unmarshall++; @@ -1529,8 +1396,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call) call->count = ntohl(call->tmp); _debug("offline msg length: %u", call->count); if (call->count >= AFSNAMEMAX) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_offline_msg_len); + return afs_protocol_error(call, afs_eproto_offline_msg_len); size = (call->count + 3) & ~3; /* It's padded */ afs_extract_to_buf(call, size); call->unmarshall++; @@ -1560,8 +1426,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call) call->count = ntohl(call->tmp); _debug("motd length: %u", call->count); if (call->count >= AFSNAMEMAX) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_motd_len); + return afs_protocol_error(call, afs_eproto_motd_len); size = (call->count + 3) & ~3; /* It's padded */ afs_extract_to_buf(call, size); call->unmarshall++; @@ -1601,37 +1466,26 @@ static const struct afs_call_type afs_RXFSGetVolumeStatus = { /* * fetch the status of a volume */ -int afs_fs_get_volume_status(struct afs_fs_cursor *fc, - struct afs_volume_status *vs) +void afs_fs_get_volume_status(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); __be32 *bp; - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)) - return yfs_fs_get_volume_status(fc, vs); - _enter(""); - call = afs_alloc_flat_call(net, &afs_RXFSGetVolumeStatus, 2 * 4, + call = afs_alloc_flat_call(op->net, &afs_RXFSGetVolumeStatus, 2 * 4, max(12 * 4, AFSOPAQUEMAX + 1)); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_volstatus = vs; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp[0] = htonl(FSGETVOLUMESTATUS); - bp[1] = htonl(vnode->fid.vid); + bp[1] = htonl(vp->fid.vid); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -1639,6 +1493,7 @@ int afs_fs_get_volume_status(struct afs_fs_cursor *fc, */ static int afs_deliver_fs_xxxx_lock(struct afs_call *call) { + struct afs_operation *op = call->op; const __be32 *bp; int ret; @@ -1650,7 +1505,7 @@ static int afs_deliver_fs_xxxx_lock(struct afs_call *call) /* unmarshall the reply once we've received all of it */ bp = call->buffer; - xdr_decode_AFSVolSync(&bp, call->out_volsync); + xdr_decode_AFSVolSync(&bp, &op->volsync); _leave(" = 0 [done]"); return 0; @@ -1691,114 +1546,80 @@ static const struct afs_call_type afs_RXFSReleaseLock = { /* * Set a lock on a file */ -int afs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type, - struct afs_status_cb *scb) +void afs_fs_set_lock(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); __be32 *bp; - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)) - return yfs_fs_set_lock(fc, type, scb); - _enter(""); - call = afs_alloc_flat_call(net, &afs_RXFSSetLock, 5 * 4, 6 * 4); + call = afs_alloc_flat_call(op->net, &afs_RXFSSetLock, 5 * 4, 6 * 4); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->lvnode = vnode; - call->out_scb = scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; *bp++ = htonl(FSSETLOCK); - *bp++ = htonl(vnode->fid.vid); - *bp++ = htonl(vnode->fid.vnode); - *bp++ = htonl(vnode->fid.unique); - *bp++ = htonl(type); - - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_calli(call, &vnode->fid, type); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + *bp++ = htonl(vp->fid.vid); + *bp++ = htonl(vp->fid.vnode); + *bp++ = htonl(vp->fid.unique); + *bp++ = htonl(op->lock.type); + + trace_afs_make_fs_calli(call, &vp->fid, op->lock.type); + afs_make_op_call(op, call, GFP_NOFS); } /* * extend a lock on a file */ -int afs_fs_extend_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb) +void afs_fs_extend_lock(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); __be32 *bp; - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)) - return yfs_fs_extend_lock(fc, scb); - _enter(""); - call = afs_alloc_flat_call(net, &afs_RXFSExtendLock, 4 * 4, 6 * 4); + call = afs_alloc_flat_call(op->net, &afs_RXFSExtendLock, 4 * 4, 6 * 4); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->lvnode = vnode; - call->out_scb = scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; *bp++ = htonl(FSEXTENDLOCK); - *bp++ = htonl(vnode->fid.vid); - *bp++ = htonl(vnode->fid.vnode); - *bp++ = htonl(vnode->fid.unique); - - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + *bp++ = htonl(vp->fid.vid); + *bp++ = htonl(vp->fid.vnode); + *bp++ = htonl(vp->fid.unique); + + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* * release a lock on a file */ -int afs_fs_release_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb) +void afs_fs_release_lock(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); __be32 *bp; - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)) - return yfs_fs_release_lock(fc, scb); - _enter(""); - call = afs_alloc_flat_call(net, &afs_RXFSReleaseLock, 4 * 4, 6 * 4); + call = afs_alloc_flat_call(op->net, &afs_RXFSReleaseLock, 4 * 4, 6 * 4); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->lvnode = vnode; - call->out_scb = scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; *bp++ = htonl(FSRELEASELOCK); - *bp++ = htonl(vnode->fid.vid); - *bp++ = htonl(vnode->fid.vnode); - *bp++ = htonl(vnode->fid.unique); - - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + *bp++ = htonl(vp->fid.vid); + *bp++ = htonl(vp->fid.vnode); + *bp++ = htonl(vp->fid.unique); + + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -1842,7 +1663,7 @@ int afs_fs_give_up_all_callbacks(struct afs_net *net, bp = call->request; *bp++ = htonl(FSGIVEUPALLCALLBACKS); - /* Can't take a ref on server */ + call->server = afs_use_server(server, afs_server_trace_give_up_cb); afs_make_call(ac, call, GFP_NOFS); return afs_wait_for_call_to_complete(call, ac); } @@ -1905,14 +1726,13 @@ static const struct afs_call_type afs_RXFSGetCapabilities = { }; /* - * Probe a fileserver for the capabilities that it supports. This can - * return up to 196 words. + * Probe a fileserver for the capabilities that it supports. This RPC can + * reply with up to 196 words. The operation is asynchronous and if we managed + * to allocate a call, true is returned the result is delivered through the + * ->done() - otherwise we return false to indicate we didn't even try. */ -struct afs_call *afs_fs_get_capabilities(struct afs_net *net, - struct afs_server *server, - struct afs_addr_cursor *ac, - struct key *key, - unsigned int server_index) +bool afs_fs_get_capabilities(struct afs_net *net, struct afs_server *server, + struct afs_addr_cursor *ac, struct key *key) { struct afs_call *call; __be32 *bp; @@ -1921,11 +1741,10 @@ struct afs_call *afs_fs_get_capabilities(struct afs_net *net, call = afs_alloc_flat_call(net, &afs_RXFSGetCapabilities, 1 * 4, 16 * 4); if (!call) - return ERR_PTR(-ENOMEM); + return false; call->key = key; - call->server = afs_get_server(server, afs_server_trace_get_caps); - call->server_index = server_index; + call->server = afs_use_server(server, afs_server_trace_get_caps); call->upgrade = true; call->async = true; call->max_lifespan = AFS_PROBE_MAX_LIFESPAN; @@ -1934,87 +1753,10 @@ struct afs_call *afs_fs_get_capabilities(struct afs_net *net, bp = call->request; *bp++ = htonl(FSGETCAPABILITIES); - /* Can't take a ref on server */ trace_afs_make_fs_call(call, NULL); afs_make_call(ac, call, GFP_NOFS); - return call; -} - -/* - * Deliver reply data to an FS.FetchStatus with no vnode. - */ -static int afs_deliver_fs_fetch_status(struct afs_call *call) -{ - const __be32 *bp; - int ret; - - ret = afs_transfer_reply(call); - if (ret < 0) - return ret; - - /* unmarshall the reply once we've received all of it */ - bp = call->buffer; - ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - xdr_decode_AFSCallBack(&bp, call, call->out_scb); - xdr_decode_AFSVolSync(&bp, call->out_volsync); - - _leave(" = 0 [done]"); - return 0; -} - -/* - * FS.FetchStatus operation type - */ -static const struct afs_call_type afs_RXFSFetchStatus = { - .name = "FS.FetchStatus", - .op = afs_FS_FetchStatus, - .deliver = afs_deliver_fs_fetch_status, - .destructor = afs_flat_call_destructor, -}; - -/* - * Fetch the status information for a fid without needing a vnode handle. - */ -int afs_fs_fetch_status(struct afs_fs_cursor *fc, - struct afs_net *net, - struct afs_fid *fid, - struct afs_status_cb *scb, - struct afs_volsync *volsync) -{ - struct afs_call *call; - __be32 *bp; - - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)) - return yfs_fs_fetch_status(fc, net, fid, scb, volsync); - - _enter(",%x,{%llx:%llu},,", - key_serial(fc->key), fid->vid, fid->vnode); - - call = afs_alloc_flat_call(net, &afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4); - if (!call) { - fc->ac.error = -ENOMEM; - return -ENOMEM; - } - - call->key = fc->key; - call->out_fid = fid; - call->out_scb = scb; - call->out_volsync = volsync; - - /* marshall the parameters */ - bp = call->request; - bp[0] = htonl(FSFETCHSTATUS); - bp[1] = htonl(fid->vid); - bp[2] = htonl(fid->vnode); - bp[3] = htonl(fid->unique); - - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + afs_put_call(call); + return true; } /* @@ -2022,6 +1764,7 @@ int afs_fs_fetch_status(struct afs_fs_cursor *fc, */ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call) { + struct afs_operation *op = call->op; struct afs_status_cb *scb; const __be32 *bp; u32 tmp; @@ -2043,10 +1786,9 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call) return ret; tmp = ntohl(call->tmp); - _debug("status count: %u/%u", tmp, call->count2); - if (tmp != call->count2) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_ibulkst_count); + _debug("status count: %u/%u", tmp, op->nr_files); + if (tmp != op->nr_files) + return afs_protocol_error(call, afs_eproto_ibulkst_count); call->count = 0; call->unmarshall++; @@ -2060,14 +1802,23 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call) if (ret < 0) return ret; + switch (call->count) { + case 0: + scb = &op->file[0].scb; + break; + case 1: + scb = &op->file[1].scb; + break; + default: + scb = &op->more_files[call->count - 2].scb; + break; + } + bp = call->buffer; - scb = &call->out_scb[call->count]; - ret = xdr_decode_AFSFetchStatus(&bp, call, scb); - if (ret < 0) - return ret; + xdr_decode_AFSFetchStatus(&bp, call, scb); call->count++; - if (call->count < call->count2) + if (call->count < op->nr_files) goto more_counts; call->count = 0; @@ -2084,9 +1835,8 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call) tmp = ntohl(call->tmp); _debug("CB count: %u", tmp); - if (tmp != call->count2) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_ibulkst_cb_count); + if (tmp != op->nr_files) + return afs_protocol_error(call, afs_eproto_ibulkst_cb_count); call->count = 0; call->unmarshall++; more_cbs: @@ -2100,11 +1850,22 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call) return ret; _debug("unmarshall CB array"); + switch (call->count) { + case 0: + scb = &op->file[0].scb; + break; + case 1: + scb = &op->file[1].scb; + break; + default: + scb = &op->more_files[call->count - 2].scb; + break; + } + bp = call->buffer; - scb = &call->out_scb[call->count]; xdr_decode_AFSCallBack(&bp, call, scb); call->count++; - if (call->count < call->count2) + if (call->count < op->nr_files) goto more_cbs; afs_extract_to_buf(call, 6 * sizeof(__be32)); @@ -2117,7 +1878,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call) return ret; bp = call->buffer; - xdr_decode_AFSVolSync(&bp, call->out_volsync); + xdr_decode_AFSVolSync(&bp, &op->volsync); call->unmarshall++; @@ -2129,6 +1890,16 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call) return 0; } +static void afs_done_fs_inline_bulk_status(struct afs_call *call) +{ + if (call->error == -ECONNABORTED && + call->abort_code == RX_INVALID_OPERATION) { + set_bit(AFS_SERVER_FL_NO_IBULK, &call->server->flags); + if (call->op) + set_bit(AFS_VOLUME_MAYBE_NO_IBULK, &call->op->volume->flags); + } +} + /* * FS.InlineBulkStatus operation type */ @@ -2136,58 +1907,53 @@ static const struct afs_call_type afs_RXFSInlineBulkStatus = { .name = "FS.InlineBulkStatus", .op = afs_FS_InlineBulkStatus, .deliver = afs_deliver_fs_inline_bulk_status, + .done = afs_done_fs_inline_bulk_status, .destructor = afs_flat_call_destructor, }; /* * Fetch the status information for up to 50 files */ -int afs_fs_inline_bulk_status(struct afs_fs_cursor *fc, - struct afs_net *net, - struct afs_fid *fids, - struct afs_status_cb *statuses, - unsigned int nr_fids, - struct afs_volsync *volsync) +void afs_fs_inline_bulk_status(struct afs_operation *op) { + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode_param *vp = &op->file[1]; struct afs_call *call; __be32 *bp; int i; - if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)) - return yfs_fs_inline_bulk_status(fc, net, fids, statuses, - nr_fids, volsync); + if (test_bit(AFS_SERVER_FL_NO_IBULK, &op->server->flags)) { + op->error = -ENOTSUPP; + return; + } _enter(",%x,{%llx:%llu},%u", - key_serial(fc->key), fids[0].vid, fids[1].vnode, nr_fids); + key_serial(op->key), vp->fid.vid, vp->fid.vnode, op->nr_files); - call = afs_alloc_flat_call(net, &afs_RXFSInlineBulkStatus, - (2 + nr_fids * 3) * 4, + call = afs_alloc_flat_call(op->net, &afs_RXFSInlineBulkStatus, + (2 + op->nr_files * 3) * 4, 21 * 4); - if (!call) { - fc->ac.error = -ENOMEM; - return -ENOMEM; - } - - call->key = fc->key; - call->out_scb = statuses; - call->out_volsync = volsync; - call->count2 = nr_fids; + if (!call) + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; *bp++ = htonl(FSINLINEBULKSTATUS); - *bp++ = htonl(nr_fids); - for (i = 0; i < nr_fids; i++) { - *bp++ = htonl(fids[i].vid); - *bp++ = htonl(fids[i].vnode); - *bp++ = htonl(fids[i].unique); + *bp++ = htonl(op->nr_files); + *bp++ = htonl(dvp->fid.vid); + *bp++ = htonl(dvp->fid.vnode); + *bp++ = htonl(dvp->fid.unique); + *bp++ = htonl(vp->fid.vid); + *bp++ = htonl(vp->fid.vnode); + *bp++ = htonl(vp->fid.unique); + for (i = 0; i < op->nr_files - 2; i++) { + *bp++ = htonl(op->more_files[i].fid.vid); + *bp++ = htonl(op->more_files[i].fid.vnode); + *bp++ = htonl(op->more_files[i].fid.unique); } - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &fids[0]); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -2195,6 +1961,8 @@ int afs_fs_inline_bulk_status(struct afs_fs_cursor *fc, */ static int afs_deliver_fs_fetch_acl(struct afs_call *call) { + struct afs_operation *op = call->op; + struct afs_vnode_param *vp = &op->file[0]; struct afs_acl *acl; const __be32 *bp; unsigned int size; @@ -2220,7 +1988,7 @@ static int afs_deliver_fs_fetch_acl(struct afs_call *call) acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL); if (!acl) return -ENOMEM; - call->ret_acl = acl; + op->acl = acl; acl->size = call->count2; afs_extract_begin(call, acl->data, size); call->unmarshall++; @@ -2243,10 +2011,8 @@ static int afs_deliver_fs_fetch_acl(struct afs_call *call) return ret; bp = call->buffer; - ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - xdr_decode_AFSVolSync(&bp, call->out_volsync); + xdr_decode_AFSFetchStatus(&bp, call, &vp->scb); + xdr_decode_AFSVolSync(&bp, &op->volsync); call->unmarshall++; @@ -2258,12 +2024,6 @@ static int afs_deliver_fs_fetch_acl(struct afs_call *call) return 0; } -static void afs_destroy_fs_fetch_acl(struct afs_call *call) -{ - kfree(call->ret_acl); - afs_flat_call_destructor(call); -} - /* * FS.FetchACL operation type */ @@ -2271,68 +2031,33 @@ static const struct afs_call_type afs_RXFSFetchACL = { .name = "FS.FetchACL", .op = afs_FS_FetchACL, .deliver = afs_deliver_fs_fetch_acl, - .destructor = afs_destroy_fs_fetch_acl, }; /* * Fetch the ACL for a file. */ -struct afs_acl *afs_fs_fetch_acl(struct afs_fs_cursor *fc, - struct afs_status_cb *scb) +void afs_fs_fetch_acl(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); __be32 *bp; _enter(",%x,{%llx:%llu},,", - key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode); + key_serial(op->key), vp->fid.vid, vp->fid.vnode); - call = afs_alloc_flat_call(net, &afs_RXFSFetchACL, 16, (21 + 6) * 4); - if (!call) { - fc->ac.error = -ENOMEM; - return ERR_PTR(-ENOMEM); - } - - call->key = fc->key; - call->ret_acl = NULL; - call->out_scb = scb; - call->out_volsync = NULL; + call = afs_alloc_flat_call(op->net, &afs_RXFSFetchACL, 16, (21 + 6) * 4); + if (!call) + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp[0] = htonl(FSFETCHACL); - bp[1] = htonl(vnode->fid.vid); - bp[2] = htonl(vnode->fid.vnode); - bp[3] = htonl(vnode->fid.unique); - - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_make_call(&fc->ac, call, GFP_KERNEL); - return (struct afs_acl *)afs_wait_for_call_to_complete(call, &fc->ac); -} - -/* - * Deliver reply data to any operation that returns file status and volume - * sync. - */ -static int afs_deliver_fs_file_status_and_vol(struct afs_call *call) -{ - const __be32 *bp; - int ret; + bp[1] = htonl(vp->fid.vid); + bp[2] = htonl(vp->fid.vnode); + bp[3] = htonl(vp->fid.unique); - ret = afs_transfer_reply(call); - if (ret < 0) - return ret; - - bp = call->buffer; - ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - xdr_decode_AFSVolSync(&bp, call->out_volsync); - - _leave(" = 0 [done]"); - return 0; + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_KERNEL); } /* @@ -2348,42 +2073,34 @@ static const struct afs_call_type afs_RXFSStoreACL = { /* * Fetch the ACL for a file. */ -int afs_fs_store_acl(struct afs_fs_cursor *fc, const struct afs_acl *acl, - struct afs_status_cb *scb) +void afs_fs_store_acl(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); + const struct afs_acl *acl = op->acl; size_t size; __be32 *bp; _enter(",%x,{%llx:%llu},,", - key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode); + key_serial(op->key), vp->fid.vid, vp->fid.vnode); size = round_up(acl->size, 4); - call = afs_alloc_flat_call(net, &afs_RXFSStoreACL, + call = afs_alloc_flat_call(op->net, &afs_RXFSStoreACL, 5 * 4 + size, (21 + 6) * 4); - if (!call) { - fc->ac.error = -ENOMEM; - return -ENOMEM; - } - - call->key = fc->key; - call->out_scb = scb; - call->out_volsync = NULL; + if (!call) + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp[0] = htonl(FSSTOREACL); - bp[1] = htonl(vnode->fid.vid); - bp[2] = htonl(vnode->fid.vnode); - bp[3] = htonl(vnode->fid.unique); + bp[1] = htonl(vp->fid.vid); + bp[2] = htonl(vp->fid.vnode); + bp[3] = htonl(vp->fid.unique); bp[4] = htonl(acl->size); memcpy(&bp[5], acl->data, acl->size); if (acl->size != size) memset((void *)&bp[5] + acl->size, 0, size - acl->size); - trace_afs_make_fs_call(call, &vnode->fid); - afs_make_call(&fc->ac, call, GFP_KERNEL); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_KERNEL); } diff --git a/fs/afs/inode.c b/fs/afs/inode.c index 281470f..7dde703 100644 --- a/fs/afs/inode.c +++ b/fs/afs/inode.c @@ -67,16 +67,18 @@ static void afs_set_i_size(struct afs_vnode *vnode, u64 size) /* * Initialise an inode from the vnode status. */ -static int afs_inode_init_from_status(struct afs_vnode *vnode, struct key *key, - struct afs_cb_interest *cbi, - struct afs_vnode *parent_vnode, - struct afs_status_cb *scb) +static int afs_inode_init_from_status(struct afs_operation *op, + struct afs_vnode_param *vp, + struct afs_vnode *vnode) { - struct afs_cb_interest *old_cbi = NULL; - struct afs_file_status *status = &scb->status; + struct afs_file_status *status = &vp->scb.status; struct inode *inode = AFS_VNODE_TO_I(vnode); struct timespec64 t; + _enter("{%llx:%llu.%u} %s", + vp->fid.vid, vp->fid.vnode, vp->fid.unique, + op->type ? op->type->name : "???"); + _debug("FS: ft=%d lk=%d sz=%llu ver=%Lu mod=%hu", status->type, status->nlink, @@ -86,12 +88,15 @@ static int afs_inode_init_from_status(struct afs_vnode *vnode, struct key *key, write_seqlock(&vnode->cb_lock); + vnode->cb_v_break = op->cb_v_break; + vnode->cb_s_break = op->cb_s_break; vnode->status = *status; t = status->mtime_client; inode->i_ctime = t; inode->i_mtime = t; inode->i_atime = t; + inode->i_flags |= S_NOATIME; inode->i_uid = make_kuid(&init_user_ns, status->owner); inode->i_gid = make_kgid(&init_user_ns, status->group); set_nlink(&vnode->vfs_inode, status->nlink); @@ -128,9 +133,9 @@ static int afs_inode_init_from_status(struct afs_vnode *vnode, struct key *key, inode_nohighmem(inode); break; default: - dump_vnode(vnode, parent_vnode); + dump_vnode(vnode, op->file[0].vnode != vnode ? op->file[0].vnode : NULL); write_sequnlock(&vnode->cb_lock); - return afs_protocol_error(NULL, -EBADMSG, afs_eproto_file_type); + return afs_protocol_error(NULL, afs_eproto_file_type); } afs_set_i_size(vnode, status->size); @@ -138,39 +143,36 @@ static int afs_inode_init_from_status(struct afs_vnode *vnode, struct key *key, vnode->invalid_before = status->data_version; inode_set_iversion_raw(&vnode->vfs_inode, status->data_version); - if (!scb->have_cb) { + if (!vp->scb.have_cb) { /* it's a symlink we just created (the fileserver * didn't give us a callback) */ vnode->cb_expires_at = ktime_get_real_seconds(); } else { - vnode->cb_expires_at = scb->callback.expires_at; - old_cbi = rcu_dereference_protected(vnode->cb_interest, - lockdep_is_held(&vnode->cb_lock.lock)); - if (cbi != old_cbi) - rcu_assign_pointer(vnode->cb_interest, afs_get_cb_interest(cbi)); - else - old_cbi = NULL; + vnode->cb_expires_at = vp->scb.callback.expires_at; + vnode->cb_server = op->server; set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); } write_sequnlock(&vnode->cb_lock); - afs_put_cb_interest(afs_v2net(vnode), old_cbi); return 0; } /* * Update the core inode struct from a returned status record. */ -static void afs_apply_status(struct afs_fs_cursor *fc, - struct afs_vnode *vnode, - struct afs_status_cb *scb, - const afs_dataversion_t *expected_version) +static void afs_apply_status(struct afs_operation *op, + struct afs_vnode_param *vp) { - struct afs_file_status *status = &scb->status; + struct afs_file_status *status = &vp->scb.status; + struct afs_vnode *vnode = vp->vnode; struct timespec64 t; umode_t mode; bool data_changed = false; + _enter("{%llx:%llu.%u} %s", + vp->fid.vid, vp->fid.vnode, vp->fid.unique, + op->type ? op->type->name : "???"); + BUG_ON(test_bit(AFS_VNODE_UNSET, &vnode->flags)); if (status->type != vnode->status.type) { @@ -179,7 +181,7 @@ static void afs_apply_status(struct afs_fs_cursor *fc, vnode->fid.vnode, vnode->fid.unique, status->type, vnode->status.type); - afs_protocol_error(NULL, -EBADMSG, afs_eproto_bad_status); + afs_protocol_error(NULL, afs_eproto_bad_status); return; } @@ -209,14 +211,13 @@ static void afs_apply_status(struct afs_fs_cursor *fc, vnode->status = *status; - if (expected_version && - *expected_version != status->data_version) { + if (vp->dv_before + vp->dv_delta != status->data_version) { if (test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags)) pr_warn("kAFS: vnode modified {%llx:%llu} %llx->%llx %s\n", vnode->fid.vid, vnode->fid.vnode, - (unsigned long long)*expected_version, + (unsigned long long)vp->dv_before + vp->dv_delta, (unsigned long long)status->data_version, - fc->type ? fc->type->name : "???"); + op->type ? op->type->name : "???"); vnode->invalid_before = status->data_version; if (vnode->status.type == AFS_FTYPE_DIR) { @@ -243,22 +244,15 @@ static void afs_apply_status(struct afs_fs_cursor *fc, /* * Apply a callback to a vnode. */ -static void afs_apply_callback(struct afs_fs_cursor *fc, - struct afs_vnode *vnode, - struct afs_status_cb *scb, - unsigned int cb_break) +static void afs_apply_callback(struct afs_operation *op, + struct afs_vnode_param *vp) { - struct afs_cb_interest *old; - struct afs_callback *cb = &scb->callback; + struct afs_callback *cb = &vp->scb.callback; + struct afs_vnode *vnode = vp->vnode; - if (!afs_cb_is_broken(cb_break, vnode, fc->cbi)) { + if (!afs_cb_is_broken(vp->cb_break_before, vnode)) { vnode->cb_expires_at = cb->expires_at; - old = rcu_dereference_protected(vnode->cb_interest, - lockdep_is_held(&vnode->cb_lock.lock)); - if (old != fc->cbi) { - rcu_assign_pointer(vnode->cb_interest, afs_get_cb_interest(fc->cbi)); - afs_put_cb_interest(afs_v2net(vnode), old); - } + vnode->cb_server = op->server; set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); } } @@ -267,106 +261,108 @@ static void afs_apply_callback(struct afs_fs_cursor *fc, * Apply the received status and callback to an inode all in the same critical * section to avoid races with afs_validate(). */ -void afs_vnode_commit_status(struct afs_fs_cursor *fc, - struct afs_vnode *vnode, - unsigned int cb_break, - const afs_dataversion_t *expected_version, - struct afs_status_cb *scb) +void afs_vnode_commit_status(struct afs_operation *op, struct afs_vnode_param *vp) { - if (fc->ac.error != 0) - return; + struct afs_vnode *vnode = vp->vnode; + + _enter(""); + + ASSERTCMP(op->error, ==, 0); write_seqlock(&vnode->cb_lock); - if (scb->have_error) { - if (scb->status.abort_code == VNOVNODE) { + if (vp->scb.have_error) { + if (vp->scb.status.abort_code == VNOVNODE) { set_bit(AFS_VNODE_DELETED, &vnode->flags); clear_nlink(&vnode->vfs_inode); __afs_break_callback(vnode, afs_cb_break_for_deleted); } } else { - if (scb->have_status) - afs_apply_status(fc, vnode, scb, expected_version); - if (scb->have_cb) - afs_apply_callback(fc, vnode, scb, cb_break); + if (vp->scb.have_status) + afs_apply_status(op, vp); + if (vp->scb.have_cb) + afs_apply_callback(op, vp); } write_sequnlock(&vnode->cb_lock); - if (fc->ac.error == 0 && scb->have_status) - afs_cache_permit(vnode, fc->key, cb_break, scb); + if (op->error == 0 && vp->scb.have_status) + afs_cache_permit(vnode, op->key, vp->cb_break_before, &vp->scb); } +static void afs_fetch_status_success(struct afs_operation *op) +{ + struct afs_vnode_param *vp = &op->file[0]; + struct afs_vnode *vnode = vp->vnode; + int ret; + + if (vnode->vfs_inode.i_state & I_NEW) { + ret = afs_inode_init_from_status(op, vp, vnode); + op->error = ret; + if (ret == 0) + afs_cache_permit(vnode, op->key, vp->cb_break_before, &vp->scb); + } else { + afs_vnode_commit_status(op, vp); + } +} + +static const struct afs_operation_ops afs_fetch_status_operation = { + .issue_afs_rpc = afs_fs_fetch_status, + .issue_yfs_rpc = yfs_fs_fetch_status, + .success = afs_fetch_status_success, +}; + /* * Fetch file status from the volume. */ int afs_fetch_status(struct afs_vnode *vnode, struct key *key, bool is_new, afs_access_t *_caller_access) { - struct afs_status_cb *scb; - struct afs_fs_cursor fc; - int ret; + struct afs_operation *op; _enter("%s,{%llx:%llu.%u,S=%lx}", vnode->volume->name, vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique, vnode->flags); - scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL); - if (!scb) - return -ENOMEM; + op = afs_alloc_operation(key, vnode->volume); + if (IS_ERR(op)) + return PTR_ERR(op); - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, vnode, key, true)) { - afs_dataversion_t data_version = vnode->status.data_version; + afs_op_set_vnode(op, 0, vnode); - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(vnode); - afs_fs_fetch_file_status(&fc, scb, NULL); - } - - if (fc.error) { - /* Do nothing. */ - } else if (is_new) { - ret = afs_inode_init_from_status(vnode, key, fc.cbi, - NULL, scb); - fc.error = ret; - if (ret == 0) - afs_cache_permit(vnode, key, fc.cb_break, scb); - } else { - afs_vnode_commit_status(&fc, vnode, fc.cb_break, - &data_version, scb); - } - afs_check_for_remote_deletion(&fc, vnode); - ret = afs_end_vnode_operation(&fc); - } + op->nr_files = 1; + op->ops = &afs_fetch_status_operation; + afs_begin_vnode_operation(op); + afs_wait_for_operation(op); - if (ret == 0 && _caller_access) - *_caller_access = scb->status.caller_access; - kfree(scb); - _leave(" = %d", ret); - return ret; + if (_caller_access) + *_caller_access = op->file[0].scb.status.caller_access; + return afs_put_operation(op); } /* - * iget5() comparator + * ilookup() comparator */ -int afs_iget5_test(struct inode *inode, void *opaque) +int afs_ilookup5_test_by_fid(struct inode *inode, void *opaque) { - struct afs_iget_data *iget_data = opaque; struct afs_vnode *vnode = AFS_FS_I(inode); + struct afs_fid *fid = opaque; - return memcmp(&vnode->fid, &iget_data->fid, sizeof(iget_data->fid)) == 0; + return (fid->vnode == vnode->fid.vnode && + fid->vnode_hi == vnode->fid.vnode_hi && + fid->unique == vnode->fid.unique); } /* - * iget5() comparator for inode created by autocell operations - * - * These pseudo inodes don't match anything. + * iget5() comparator */ -static int afs_iget5_pseudo_dir_test(struct inode *inode, void *opaque) +static int afs_iget5_test(struct inode *inode, void *opaque) { - return 0; + struct afs_vnode_param *vp = opaque; + //struct afs_vnode *vnode = AFS_FS_I(inode); + + return afs_ilookup5_test_by_fid(inode, &vp->fid); } /* @@ -374,99 +370,22 @@ static int afs_iget5_pseudo_dir_test(struct inode *inode, void *opaque) */ static int afs_iget5_set(struct inode *inode, void *opaque) { - struct afs_iget_data *iget_data = opaque; + struct afs_vnode_param *vp = opaque; + struct afs_super_info *as = AFS_FS_S(inode->i_sb); struct afs_vnode *vnode = AFS_FS_I(inode); - vnode->fid = iget_data->fid; - vnode->volume = iget_data->volume; - vnode->cb_v_break = iget_data->cb_v_break; - vnode->cb_s_break = iget_data->cb_s_break; + vnode->volume = as->volume; + vnode->fid = vp->fid; /* YFS supports 96-bit vnode IDs, but Linux only supports * 64-bit inode numbers. */ - inode->i_ino = iget_data->fid.vnode; - inode->i_generation = iget_data->fid.unique; + inode->i_ino = vnode->fid.vnode; + inode->i_generation = vnode->fid.unique; return 0; } /* - * Create an inode for a dynamic root directory or an autocell dynamic - * automount dir. - */ -struct inode *afs_iget_pseudo_dir(struct super_block *sb, bool root) -{ - struct afs_super_info *as; - struct afs_vnode *vnode; - struct inode *inode; - static atomic_t afs_autocell_ino; - - struct afs_iget_data iget_data = { - .cb_v_break = 0, - .cb_s_break = 0, - }; - - _enter(""); - - as = sb->s_fs_info; - if (as->volume) { - iget_data.volume = as->volume; - iget_data.fid.vid = as->volume->vid; - } - if (root) { - iget_data.fid.vnode = 1; - iget_data.fid.unique = 1; - } else { - iget_data.fid.vnode = atomic_inc_return(&afs_autocell_ino); - iget_data.fid.unique = 0; - } - - inode = iget5_locked(sb, iget_data.fid.vnode, - afs_iget5_pseudo_dir_test, afs_iget5_set, - &iget_data); - if (!inode) { - _leave(" = -ENOMEM"); - return ERR_PTR(-ENOMEM); - } - - _debug("GOT INODE %p { ino=%lu, vl=%llx, vn=%llx, u=%x }", - inode, inode->i_ino, iget_data.fid.vid, iget_data.fid.vnode, - iget_data.fid.unique); - - vnode = AFS_FS_I(inode); - - /* there shouldn't be an existing inode */ - BUG_ON(!(inode->i_state & I_NEW)); - - inode->i_size = 0; - inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; - if (root) { - inode->i_op = &afs_dynroot_inode_operations; - inode->i_fop = &simple_dir_operations; - } else { - inode->i_op = &afs_autocell_inode_operations; - } - set_nlink(inode, 2); - inode->i_uid = GLOBAL_ROOT_UID; - inode->i_gid = GLOBAL_ROOT_GID; - inode->i_ctime = inode->i_atime = inode->i_mtime = current_time(inode); - inode->i_blocks = 0; - inode_set_iversion_raw(inode, 0); - inode->i_generation = 0; - - set_bit(AFS_VNODE_PSEUDODIR, &vnode->flags); - if (!root) { - set_bit(AFS_VNODE_MOUNTPOINT, &vnode->flags); - inode->i_flags |= S_AUTOMOUNT; - } - - inode->i_flags |= S_NOATIME; - unlock_new_inode(inode); - _leave(" = %p", inode); - return inode; -} - -/* * Get a cache cookie for an inode. */ static void afs_get_inode_cache(struct afs_vnode *vnode) @@ -501,58 +420,41 @@ static void afs_get_inode_cache(struct afs_vnode *vnode) /* * inode retrieval */ -struct inode *afs_iget(struct super_block *sb, struct key *key, - struct afs_iget_data *iget_data, - struct afs_status_cb *scb, - struct afs_cb_interest *cbi, - struct afs_vnode *parent_vnode) +struct inode *afs_iget(struct afs_operation *op, struct afs_vnode_param *vp) { - struct afs_super_info *as; + struct afs_vnode_param *dvp = &op->file[0]; + struct super_block *sb = dvp->vnode->vfs_inode.i_sb; struct afs_vnode *vnode; - struct afs_fid *fid = &iget_data->fid; struct inode *inode; int ret; - _enter(",{%llx:%llu.%u},,", fid->vid, fid->vnode, fid->unique); + _enter(",{%llx:%llu.%u},,", vp->fid.vid, vp->fid.vnode, vp->fid.unique); - as = sb->s_fs_info; - iget_data->volume = as->volume; - - inode = iget5_locked(sb, fid->vnode, afs_iget5_test, afs_iget5_set, - iget_data); + inode = iget5_locked(sb, vp->fid.vnode, afs_iget5_test, afs_iget5_set, vp); if (!inode) { _leave(" = -ENOMEM"); return ERR_PTR(-ENOMEM); } - _debug("GOT INODE %p { vl=%llx vn=%llx, u=%x }", - inode, fid->vid, fid->vnode, fid->unique); - vnode = AFS_FS_I(inode); + _debug("GOT INODE %p { vl=%llx vn=%llx, u=%x }", + inode, vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique); + /* deal with an existing inode */ if (!(inode->i_state & I_NEW)) { _leave(" = %p", inode); return inode; } - if (!scb) { - /* it's a remotely extant inode */ - ret = afs_fetch_status(vnode, key, true, NULL); - if (ret < 0) - goto bad_inode; - } else { - ret = afs_inode_init_from_status(vnode, key, cbi, parent_vnode, - scb); - if (ret < 0) - goto bad_inode; - } + ret = afs_inode_init_from_status(op, vp, vnode); + if (ret < 0) + goto bad_inode; afs_get_inode_cache(vnode); /* success */ clear_bit(AFS_VNODE_UNSET, &vnode->flags); - inode->i_flags |= S_NOATIME; unlock_new_inode(inode); _leave(" = %p", inode); return inode; @@ -564,6 +466,74 @@ bad_inode: return ERR_PTR(ret); } +static int afs_iget5_set_root(struct inode *inode, void *opaque) +{ + struct afs_super_info *as = AFS_FS_S(inode->i_sb); + struct afs_vnode *vnode = AFS_FS_I(inode); + + vnode->volume = as->volume; + vnode->fid.vid = as->volume->vid, + vnode->fid.vnode = 1; + vnode->fid.unique = 1; + inode->i_ino = 1; + inode->i_generation = 1; + return 0; +} + +/* + * Set up the root inode for a volume. This is always vnode 1, unique 1 within + * the volume. + */ +struct inode *afs_root_iget(struct super_block *sb, struct key *key) +{ + struct afs_super_info *as = AFS_FS_S(sb); + struct afs_operation *op; + struct afs_vnode *vnode; + struct inode *inode; + int ret; + + _enter(",{%llx},,", as->volume->vid); + + inode = iget5_locked(sb, 1, NULL, afs_iget5_set_root, NULL); + if (!inode) { + _leave(" = -ENOMEM"); + return ERR_PTR(-ENOMEM); + } + + _debug("GOT ROOT INODE %p { vl=%llx }", inode, as->volume->vid); + + BUG_ON(!(inode->i_state & I_NEW)); + + vnode = AFS_FS_I(inode); + vnode->cb_v_break = as->volume->cb_v_break, + + op = afs_alloc_operation(key, as->volume); + if (IS_ERR(op)) { + ret = PTR_ERR(op); + goto error; + } + + afs_op_set_vnode(op, 0, vnode); + + op->nr_files = 1; + op->ops = &afs_fetch_status_operation; + ret = afs_do_sync_operation(op); + if (ret < 0) + goto error; + + afs_get_inode_cache(vnode); + + clear_bit(AFS_VNODE_UNSET, &vnode->flags); + unlock_new_inode(inode); + _leave(" = %p", inode); + return inode; + +error: + iget_failed(inode); + _leave(" = %d [bad]", ret); + return ERR_PTR(ret); +} + /* * mark the data attached to an inode as obsolete due to a write on the server * - might also want to ditch all the outstanding writes and dirty pages @@ -586,12 +556,30 @@ void afs_zap_data(struct afs_vnode *vnode) } /* + * Get the server reinit counter for a vnode's current server. + */ +static bool afs_get_s_break_rcu(struct afs_vnode *vnode, unsigned int *_s_break) +{ + struct afs_server_list *slist = rcu_dereference(vnode->volume->servers); + struct afs_server *server; + int i; + + for (i = 0; i < slist->nr_servers; i++) { + server = slist->servers[i].server; + if (server == vnode->cb_server) { + *_s_break = READ_ONCE(server->cb_s_break); + return true; + } + } + + return false; +} + +/* * Check the validity of a vnode/inode. */ bool afs_check_validity(struct afs_vnode *vnode) { - struct afs_cb_interest *cbi; - struct afs_server *server; struct afs_volume *volume = vnode->volume; enum afs_cb_break_reason need_clear = afs_cb_break_no_break; time64_t now = ktime_get_real_seconds(); @@ -604,11 +592,8 @@ bool afs_check_validity(struct afs_vnode *vnode) cb_v_break = READ_ONCE(volume->cb_v_break); cb_break = vnode->cb_break; - if (test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags)) { - cbi = rcu_dereference(vnode->cb_interest); - server = rcu_dereference(cbi->server); - cb_s_break = READ_ONCE(server->cb_s_break); - + if (test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags) && + afs_get_s_break_rcu(vnode, &cb_s_break)) { if (vnode->cb_s_break != cb_s_break || vnode->cb_v_break != cb_v_break) { vnode->cb_s_break = cb_s_break; @@ -755,7 +740,6 @@ int afs_drop_inode(struct inode *inode) */ void afs_evict_inode(struct inode *inode) { - struct afs_cb_interest *cbi; struct afs_vnode *vnode; vnode = AFS_FS_I(inode); @@ -772,15 +756,6 @@ void afs_evict_inode(struct inode *inode) truncate_inode_pages_final(&inode->i_data); clear_inode(inode); - write_seqlock(&vnode->cb_lock); - cbi = rcu_dereference_protected(vnode->cb_interest, - lockdep_is_held(&vnode->cb_lock.lock)); - if (cbi) { - afs_put_cb_interest(afs_i2net(inode), cbi); - rcu_assign_pointer(vnode->cb_interest, NULL); - } - write_sequnlock(&vnode->cb_lock); - while (!list_empty(&vnode->wb_keys)) { struct afs_wb_key *wbk = list_entry(vnode->wb_keys.next, struct afs_wb_key, vnode_link); @@ -808,16 +783,24 @@ void afs_evict_inode(struct inode *inode) _leave(""); } +static void afs_setattr_success(struct afs_operation *op) +{ + afs_vnode_commit_status(op, &op->file[0]); +} + +static const struct afs_operation_ops afs_setattr_operation = { + .issue_afs_rpc = afs_fs_setattr, + .issue_yfs_rpc = yfs_fs_setattr, + .success = afs_setattr_success, +}; + /* * set the attributes of an inode */ int afs_setattr(struct dentry *dentry, struct iattr *attr) { - struct afs_fs_cursor fc; - struct afs_status_cb *scb; + struct afs_operation *op; struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); - struct key *key; - int ret = -ENOMEM; _enter("{%llx:%llu},{n=%pd},%x", vnode->fid.vid, vnode->fid.vnode, dentry, @@ -829,48 +812,22 @@ int afs_setattr(struct dentry *dentry, struct iattr *attr) return 0; } - scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL); - if (!scb) - goto error; - /* flush any dirty data outstanding on a regular file */ if (S_ISREG(vnode->vfs_inode.i_mode)) filemap_write_and_wait(vnode->vfs_inode.i_mapping); - if (attr->ia_valid & ATTR_FILE) { - key = afs_file_key(attr->ia_file); - } else { - key = afs_request_key(vnode->volume->cell); - if (IS_ERR(key)) { - ret = PTR_ERR(key); - goto error_scb; - } - } - - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, vnode, key, false)) { - afs_dataversion_t data_version = vnode->status.data_version; + op = afs_alloc_operation(((attr->ia_valid & ATTR_FILE) ? + afs_file_key(attr->ia_file) : NULL), + vnode->volume); + if (IS_ERR(op)) + return PTR_ERR(op); - if (attr->ia_valid & ATTR_SIZE) - data_version++; + afs_op_set_vnode(op, 0, vnode); + op->setattr.attr = attr; - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(vnode); - afs_fs_setattr(&fc, attr, scb); - } - - afs_check_for_remote_deletion(&fc, vnode); - afs_vnode_commit_status(&fc, vnode, fc.cb_break, - &data_version, scb); - ret = afs_end_vnode_operation(&fc); - } + if (attr->ia_valid & ATTR_SIZE) + op->file[0].dv_delta = 1; - if (!(attr->ia_valid & ATTR_FILE)) - key_put(key); - -error_scb: - kfree(scb); -error: - _leave(" = %d", ret); - return ret; + op->ops = &afs_setattr_operation; + return afs_do_sync_operation(op); } diff --git a/fs/afs/internal.h b/fs/afs/internal.h index 8025551..e1621b0 100644 --- a/fs/afs/internal.h +++ b/fs/afs/internal.h @@ -59,13 +59,6 @@ struct afs_fs_context { struct key *key; /* key to use for secure mounting */ }; -struct afs_iget_data { - struct afs_fid fid; - struct afs_volume *volume; /* volume on which resides */ - unsigned int cb_v_break; /* Pre-fetch volume break count */ - unsigned int cb_s_break; /* Pre-fetch server break count */ -}; - enum afs_call_state { AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ @@ -90,7 +83,6 @@ struct afs_addr_list { unsigned char nr_ipv4; /* Number of IPv4 addresses */ enum dns_record_source source:8; enum dns_lookup_status status:8; - unsigned long probed; /* Mask of servers that have been probed */ unsigned long failed; /* Mask of addrs that failed locally/ICMP */ unsigned long responded; /* Mask of addrs that responded */ struct sockaddr_rxrpc addrs[]; @@ -111,10 +103,7 @@ struct afs_call { struct afs_net *net; /* The network namespace */ struct afs_server *server; /* The fileserver record if fs op (pins ref) */ struct afs_vlserver *vlserver; /* The vlserver record if vl op */ - struct afs_cb_interest *cbi; /* Callback interest for server used */ - struct afs_vnode *lvnode; /* vnode being locked */ void *request; /* request data (first part) */ - struct address_space *mapping; /* Pages being written from */ struct iov_iter def_iter; /* Default buffer/data iterator */ struct iov_iter *iter; /* Iterator currently in use */ union { /* Convenience for ->def_iter */ @@ -126,32 +115,19 @@ struct afs_call { long ret0; /* Value to reply with instead of 0 */ struct afs_addr_list *ret_alist; struct afs_vldb_entry *ret_vldb; - struct afs_acl *ret_acl; + char *ret_str; }; - struct afs_fid *out_fid; - struct afs_status_cb *out_dir_scb; - struct afs_status_cb *out_scb; - struct yfs_acl *out_yacl; - struct afs_volsync *out_volsync; - struct afs_volume_status *out_volstatus; - struct afs_read *read_request; + struct afs_operation *op; unsigned int server_index; - pgoff_t first; /* first page in mapping to deal with */ - pgoff_t last; /* last page in mapping to deal with */ atomic_t usage; enum afs_call_state state; spinlock_t state_lock; int error; /* error code */ u32 abort_code; /* Remote abort ID or 0 */ - u32 epoch; unsigned int max_lifespan; /* Maximum lifespan to set if not 0 */ unsigned request_size; /* size of request data */ unsigned reply_max; /* maximum size of reply */ - unsigned first_offset; /* offset into mapping[first] */ - union { - unsigned last_to; /* amount of mapping[last] */ - unsigned count2; /* count used in unmarshalling */ - }; + unsigned count2; /* count used in unmarshalling */ unsigned char unmarshall; /* unmarshalling phase */ unsigned char addr_ix; /* Address in ->alist */ bool drop_ref; /* T if need to drop ref for incoming call */ @@ -161,6 +137,7 @@ struct afs_call { bool upgrade; /* T to request service upgrade */ bool have_reply_time; /* T if have got reply_time */ bool intr; /* T if interruptible */ + bool unmarshalling_error; /* T if an unmarshalling error occurred */ u16 service_id; /* Actual service ID (after upgrade) */ unsigned int debug_id; /* Trace ID */ u32 operation_ID; /* operation ID for an incoming call */ @@ -291,6 +268,7 @@ struct afs_net { struct timer_list cells_timer; atomic_t cells_outstanding; seqlock_t cells_lock; + struct mutex cells_alias_lock; struct mutex proc_cells_lock; struct hlist_head proc_cells; @@ -299,9 +277,10 @@ struct afs_net { * cell, but in practice, people create aliases and subsets and there's * no easy way to distinguish them. */ - seqlock_t fs_lock; /* For fs_servers */ + seqlock_t fs_lock; /* For fs_servers, fs_probe_*, fs_proc */ struct rb_root fs_servers; /* afs_server (by server UUID or address) */ - struct list_head fs_updates; /* afs_server (by update_at) */ + struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */ + struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */ struct hlist_head fs_proc; /* procfs servers list */ struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */ @@ -310,6 +289,9 @@ struct afs_net { struct work_struct fs_manager; struct timer_list fs_timer; + + struct work_struct fs_prober; + struct timer_list fs_probe_timer; atomic_t servers_outstanding; /* File locking renewal management */ @@ -360,8 +342,10 @@ enum afs_cell_state { * for authentication and encryption. The cell name is not typically used in * the protocol. * - * There is no easy way to determine if two cells are aliases or one is a - * subset of another. + * Two cells are determined to be aliases if they have an explicit alias (YFS + * only), share any VL servers in common or have at least one volume in common. + * "In common" means that the address list of the VL servers or the fileservers + * share at least one endpoint. */ struct afs_cell { union { @@ -369,6 +353,8 @@ struct afs_cell { struct rb_node net_node; /* Node in net->cells */ }; struct afs_net *net; + struct afs_cell *alias_of; /* The cell this is an alias of */ + struct afs_volume *root_volume; /* The root.cell volume if there is one */ struct key *anonymous_key; /* anonymous user key for this cell */ struct work_struct manager; /* Manager for init/deinit/dns */ struct hlist_node proc_link; /* /proc cell list link */ @@ -381,15 +367,21 @@ struct afs_cell { unsigned long flags; #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */ #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */ +#define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */ enum afs_cell_state state; short error; enum dns_record_source dns_source:8; /* Latest source of data from lookup */ enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */ unsigned int dns_lookup_count; /* Counter of DNS lookups */ + /* The volumes belonging to this cell */ + struct rb_root volumes; /* Tree of volumes on this server */ + struct hlist_head proc_volumes; /* procfs volume list */ + seqlock_t volume_lock; /* For volumes */ + /* Active fileserver interaction state. */ - struct list_head proc_volumes; /* procfs volume list */ - rwlock_t proc_lock; + struct rb_root fs_servers; /* afs_server (by server UUID) */ + seqlock_t fs_lock; /* For fs_servers */ /* VL server list. */ rwlock_t vl_servers_lock; /* Lock on vl_servers */ @@ -471,6 +463,7 @@ struct afs_vldb_entry { #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ uuid_t fs_server[AFS_NMAXNSERVERS]; + u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */ u8 fs_mask[AFS_NMAXNSERVERS]; #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ @@ -492,94 +485,64 @@ struct afs_server { }; struct afs_addr_list __rcu *addresses; - struct rb_node uuid_rb; /* Link in net->servers */ + struct afs_cell *cell; /* Cell to which belongs (pins ref) */ + struct rb_node uuid_rb; /* Link in net->fs_servers */ + struct afs_server __rcu *uuid_next; /* Next server with same UUID */ + struct afs_server *uuid_prev; /* Previous server with same UUID */ + struct list_head probe_link; /* Link in net->fs_probe_list */ struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ struct hlist_node proc_link; /* Link in net->fs_proc */ struct afs_server *gc_next; /* Next server in manager's list */ - time64_t put_time; /* Time at which last put */ - time64_t update_at; /* Time at which to next update the record */ + time64_t unuse_time; /* Time at which last unused */ unsigned long flags; -#define AFS_SERVER_FL_NOT_READY 1 /* The record is not ready for use */ -#define AFS_SERVER_FL_NOT_FOUND 2 /* VL server says no such server */ -#define AFS_SERVER_FL_VL_FAIL 3 /* Failed to access VL server */ -#define AFS_SERVER_FL_UPDATING 4 -#define AFS_SERVER_FL_PROBED 5 /* The fileserver has been probed */ -#define AFS_SERVER_FL_PROBING 6 /* Fileserver is being probed */ -#define AFS_SERVER_FL_NO_IBULK 7 /* Fileserver doesn't support FS.InlineBulkStatus */ +#define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */ +#define AFS_SERVER_FL_UPDATING 1 +#define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */ +#define AFS_SERVER_FL_NOT_READY 4 /* The record is not ready for use */ +#define AFS_SERVER_FL_NOT_FOUND 5 /* VL server says no such server */ +#define AFS_SERVER_FL_VL_FAIL 6 /* Failed to access VL server */ #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ -#define AFS_SERVER_FL_IS_YFS 9 /* Server is YFS not AFS */ -#define AFS_SERVER_FL_NO_RM2 10 /* Fileserver doesn't support YFS.RemoveFile2 */ -#define AFS_SERVER_FL_HAVE_EPOCH 11 /* ->epoch is valid */ - atomic_t usage; +#define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */ +#define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */ +#define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */ + atomic_t ref; /* Object refcount */ + atomic_t active; /* Active user count */ u32 addr_version; /* Address list version */ - u32 cm_epoch; /* Server RxRPC epoch */ + unsigned int rtt; /* Server's current RTT in uS */ unsigned int debug_id; /* Debugging ID for traces */ /* file service access */ rwlock_t fs_lock; /* access lock */ /* callback promise management */ - struct hlist_head cb_volumes; /* List of volume interests on this server */ unsigned cb_s_break; /* Break-everything counter. */ - rwlock_t cb_break_lock; /* Volume finding lock */ /* Probe state */ + unsigned long probed_at; /* Time last probe was dispatched (jiffies) */ wait_queue_head_t probe_wq; atomic_t probe_outstanding; spinlock_t probe_lock; struct { - unsigned int rtt; /* RTT as ktime/64 */ + unsigned int rtt; /* RTT in uS */ u32 abort_code; - u32 cm_epoch; short error; bool responded:1; bool is_yfs:1; bool not_yfs:1; bool local_failure:1; - bool cm_probed:1; - bool said_rebooted:1; - bool said_inconsistent:1; } probe; }; /* - * Volume collation in the server's callback interest list. - */ -struct afs_vol_interest { - struct hlist_node srv_link; /* Link in server->cb_volumes */ - struct hlist_head cb_interests; /* List of callback interests on the server */ - union { - struct rcu_head rcu; - afs_volid_t vid; /* Volume ID to match */ - }; - unsigned int usage; -}; - -/* - * Interest by a superblock on a server. - */ -struct afs_cb_interest { - struct hlist_node cb_vlink; /* Link in vol_interest->cb_interests */ - struct afs_vol_interest *vol_interest; - struct afs_server *server; /* Server on which this interest resides */ - struct super_block *sb; /* Superblock on which inodes reside */ - union { - struct rcu_head rcu; - afs_volid_t vid; /* Volume ID to match */ - }; - refcount_t usage; -}; - -/* - * Replaceable server list. + * Replaceable volume server list. */ struct afs_server_entry { struct afs_server *server; - struct afs_cb_interest *cb_interest; }; struct afs_server_list { + afs_volid_t vids[AFS_MAXTYPES]; /* Volume IDs */ refcount_t usage; unsigned char nr_servers; unsigned char preferred; /* Preferred server */ @@ -593,11 +556,16 @@ struct afs_server_list { * Live AFS volume management. */ struct afs_volume { - afs_volid_t vid; /* volume ID */ + union { + struct rcu_head rcu; + afs_volid_t vid; /* volume ID */ + }; atomic_t usage; time64_t update_at; /* Time at which to next update */ struct afs_cell *cell; /* Cell to which belongs (pins ref) */ - struct list_head proc_link; /* Link in cell->vl_proc */ + struct rb_node cell_node; /* Link in cell->volumes */ + struct hlist_node proc_link; /* Link in cell->proc_volumes */ + struct super_block __rcu *sb; /* Superblock on which inodes reside */ unsigned long flags; #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ @@ -605,10 +573,11 @@ struct afs_volume { #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */ #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */ +#define AFS_VOLUME_MAYBE_NO_IBULK 6 /* - T if some servers don't have InlineBulkStatus */ #ifdef CONFIG_AFS_FSCACHE struct fscache_cookie *cache; /* caching cookie */ #endif - struct afs_server_list *servers; /* List of servers on which volume resides */ + struct afs_server_list __rcu *servers; /* List of servers on which volume resides */ rwlock_t servers_lock; /* Lock for ->servers */ unsigned int servers_seq; /* Incremented each time ->servers changes */ @@ -616,7 +585,6 @@ struct afs_volume { rwlock_t cb_v_break_lock; afs_voltype_t type; /* type of volume */ - short error; char type_force; /* force volume type (suppress R/O -> R/W) */ u8 name_len; u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ @@ -677,11 +645,11 @@ struct afs_vnode { afs_lock_type_t lock_type : 8; /* outstanding callback notification on this file */ - struct afs_cb_interest __rcu *cb_interest; /* Server on which this resides */ + void *cb_server; /* Server with callback/filelock */ unsigned int cb_s_break; /* Mass break counter on ->server */ unsigned int cb_v_break; /* Mass break counter on ->volume */ unsigned int cb_break; /* Break counter on vnode */ - seqlock_t cb_lock; /* Lock for ->cb_interest, ->status, ->cb_*break */ + seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */ time64_t cb_expires_at; /* time at which callback expires */ }; @@ -758,29 +726,118 @@ struct afs_vl_cursor { }; /* - * Cursor for iterating over a set of fileservers. + * Fileserver operation methods. + */ +struct afs_operation_ops { + void (*issue_afs_rpc)(struct afs_operation *op); + void (*issue_yfs_rpc)(struct afs_operation *op); + void (*success)(struct afs_operation *op); + void (*aborted)(struct afs_operation *op); + void (*edit_dir)(struct afs_operation *op); + void (*put)(struct afs_operation *op); +}; + +struct afs_vnode_param { + struct afs_vnode *vnode; + struct afs_fid fid; /* Fid to access */ + struct afs_status_cb scb; /* Returned status and callback promise */ + afs_dataversion_t dv_before; /* Data version before the call */ + unsigned int cb_break_before; /* cb_break + cb_s_break before the call */ + u8 dv_delta; /* Expected change in data version */ + bool put_vnode; /* T if we have a ref on the vnode */ + bool need_io_lock; /* T if we need the I/O lock on this */ +}; + +/* + * Fileserver operation wrapper, handling server and address rotation + * asynchronously. May make simultaneous calls to multiple servers. */ -struct afs_fs_cursor { +struct afs_operation { + struct afs_net *net; /* Network namespace */ + struct key *key; /* Key for the cell */ const struct afs_call_type *type; /* Type of call done */ + const struct afs_operation_ops *ops; + + /* Parameters/results for the operation */ + struct afs_volume *volume; /* Volume being accessed */ + struct afs_vnode_param file[2]; + struct afs_vnode_param *more_files; + struct afs_volsync volsync; + struct dentry *dentry; /* Dentry to be altered */ + struct dentry *dentry_2; /* Second dentry to be altered */ + struct timespec64 mtime; /* Modification time to record */ + short nr_files; /* Number of entries in file[], more_files */ + short error; + unsigned int abort_code; + unsigned int debug_id; + + unsigned int cb_v_break; /* Volume break counter before op */ + unsigned int cb_s_break; /* Server break counter before op */ + + union { + struct { + int which; /* Which ->file[] to fetch for */ + } fetch_status; + struct { + int reason; /* enum afs_edit_dir_reason */ + mode_t mode; + const char *symlink; + } create; + struct { + bool need_rehash; + } unlink; + struct { + struct dentry *rehash; + struct dentry *tmp; + bool new_negative; + } rename; + struct { + struct afs_read *req; + } fetch; + struct { + struct afs_vnode *lvnode; /* vnode being locked */ + afs_lock_type_t type; + } lock; + struct { + struct address_space *mapping; /* Pages being written from */ + pgoff_t first; /* first page in mapping to deal with */ + pgoff_t last; /* last page in mapping to deal with */ + unsigned first_offset; /* offset into mapping[first] */ + unsigned last_to; /* amount of mapping[last] */ + } store; + struct { + struct iattr *attr; + } setattr; + struct afs_acl *acl; + struct yfs_acl *yacl; + struct { + struct afs_volume_status vs; + struct kstatfs *buf; + } volstatus; + }; + + /* Fileserver iteration state */ struct afs_addr_cursor ac; - struct afs_vnode *vnode; struct afs_server_list *server_list; /* Current server list (pins ref) */ - struct afs_cb_interest *cbi; /* Server on which this resides (pins ref) */ - struct key *key; /* Key for the server */ + struct afs_server *server; /* Server we're using (ref pinned by server_list) */ + struct afs_call *call; unsigned long untried; /* Bitmask of untried servers */ - unsigned int cb_break; /* cb_break + cb_s_break before the call */ - unsigned int cb_break_2; /* cb_break + cb_s_break (2nd vnode) */ short index; /* Current server */ - short error; - unsigned short flags; -#define AFS_FS_CURSOR_STOP 0x0001 /* Set to cease iteration */ -#define AFS_FS_CURSOR_VBUSY 0x0002 /* Set if seen VBUSY */ -#define AFS_FS_CURSOR_VMOVED 0x0004 /* Set if seen VMOVED */ -#define AFS_FS_CURSOR_VNOVOL 0x0008 /* Set if seen VNOVOL */ -#define AFS_FS_CURSOR_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ -#define AFS_FS_CURSOR_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ -#define AFS_FS_CURSOR_INTR 0x0040 /* Set if op is interruptible */ unsigned short nr_iterations; /* Number of server iterations */ + + unsigned int flags; +#define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ +#define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ +#define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ +#define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ +#define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ +#define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ +#define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ +#define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ +#define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ +#define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ +#define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ +#define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ }; /* @@ -838,29 +895,15 @@ extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); -extern int afs_register_server_cb_interest(struct afs_vnode *, - struct afs_server_list *, unsigned int); -extern void afs_put_cb_interest(struct afs_net *, struct afs_cb_interest *); -extern void afs_clear_callback_interests(struct afs_net *, struct afs_server_list *); - -static inline struct afs_cb_interest *afs_get_cb_interest(struct afs_cb_interest *cbi) -{ - if (cbi) - refcount_inc(&cbi->usage); - return cbi; -} - static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) { return vnode->cb_break + vnode->cb_v_break; } static inline bool afs_cb_is_broken(unsigned int cb_break, - const struct afs_vnode *vnode, - const struct afs_cb_interest *cbi) + const struct afs_vnode *vnode) { - return !cbi || cb_break != (vnode->cb_break + - vnode->volume->cb_v_break); + return cb_break != (vnode->cb_break + vnode->volume->cb_v_break); } /* @@ -952,71 +995,81 @@ extern int afs_flock(struct file *, int, struct file_lock *); /* * fsclient.c */ -extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_status_cb *, - struct afs_volsync *); -extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *); -extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_status_cb *, struct afs_read *); -extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t, - struct afs_status_cb *, struct afs_fid *, struct afs_status_cb *); -extern int afs_fs_remove(struct afs_fs_cursor *, struct afs_vnode *, const char *, bool, - struct afs_status_cb *); -extern int afs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *, - struct afs_status_cb *, struct afs_status_cb *); -extern int afs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, - struct afs_status_cb *, struct afs_fid *, struct afs_status_cb *); -extern int afs_fs_rename(struct afs_fs_cursor *, const char *, - struct afs_vnode *, const char *, - struct afs_status_cb *, struct afs_status_cb *); -extern int afs_fs_store_data(struct afs_fs_cursor *, struct address_space *, - pgoff_t, pgoff_t, unsigned, unsigned, struct afs_status_cb *); -extern int afs_fs_setattr(struct afs_fs_cursor *, struct iattr *, struct afs_status_cb *); -extern int afs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *); -extern int afs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t, struct afs_status_cb *); -extern int afs_fs_extend_lock(struct afs_fs_cursor *, struct afs_status_cb *); -extern int afs_fs_release_lock(struct afs_fs_cursor *, struct afs_status_cb *); +extern void afs_fs_fetch_status(struct afs_operation *); +extern void afs_fs_fetch_data(struct afs_operation *); +extern void afs_fs_create_file(struct afs_operation *); +extern void afs_fs_make_dir(struct afs_operation *); +extern void afs_fs_remove_file(struct afs_operation *); +extern void afs_fs_remove_dir(struct afs_operation *); +extern void afs_fs_link(struct afs_operation *); +extern void afs_fs_symlink(struct afs_operation *); +extern void afs_fs_rename(struct afs_operation *); +extern void afs_fs_store_data(struct afs_operation *); +extern void afs_fs_setattr(struct afs_operation *); +extern void afs_fs_get_volume_status(struct afs_operation *); +extern void afs_fs_set_lock(struct afs_operation *); +extern void afs_fs_extend_lock(struct afs_operation *); +extern void afs_fs_release_lock(struct afs_operation *); extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, struct afs_addr_cursor *, struct key *); -extern struct afs_call *afs_fs_get_capabilities(struct afs_net *, struct afs_server *, - struct afs_addr_cursor *, struct key *, - unsigned int); -extern int afs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *, - struct afs_fid *, struct afs_status_cb *, - unsigned int, struct afs_volsync *); -extern int afs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *, - struct afs_fid *, struct afs_status_cb *, - struct afs_volsync *); +extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *, + struct afs_addr_cursor *, struct key *); +extern void afs_fs_inline_bulk_status(struct afs_operation *); struct afs_acl { u32 size; u8 data[]; }; -extern struct afs_acl *afs_fs_fetch_acl(struct afs_fs_cursor *, struct afs_status_cb *); -extern int afs_fs_store_acl(struct afs_fs_cursor *, const struct afs_acl *, - struct afs_status_cb *); +extern void afs_fs_fetch_acl(struct afs_operation *); +extern void afs_fs_store_acl(struct afs_operation *); + +/* + * fs_operation.c + */ +extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); +extern int afs_put_operation(struct afs_operation *); +extern bool afs_begin_vnode_operation(struct afs_operation *); +extern void afs_wait_for_operation(struct afs_operation *); +extern int afs_do_sync_operation(struct afs_operation *); + +static inline void afs_op_nomem(struct afs_operation *op) +{ + op->error = -ENOMEM; +} + +static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, + struct afs_vnode *vnode) +{ + op->file[n].vnode = vnode; + op->file[n].need_io_lock = true; +} + +static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, + const struct afs_fid *fid) +{ + op->file[n].fid = *fid; +} /* * fs_probe.c */ extern void afs_fileserver_probe_result(struct afs_call *); -extern int afs_probe_fileservers(struct afs_net *, struct key *, struct afs_server_list *); +extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool); extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long); +extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); +extern void afs_fs_probe_dispatcher(struct work_struct *); +extern int afs_wait_for_one_fs_probe(struct afs_server *, bool); /* * inode.c */ -extern void afs_vnode_commit_status(struct afs_fs_cursor *, - struct afs_vnode *, - unsigned int, - const afs_dataversion_t *, - struct afs_status_cb *); +extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); -extern int afs_iget5_test(struct inode *, void *); +extern int afs_ilookup5_test_by_fid(struct inode *, void *); extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); -extern struct inode *afs_iget(struct super_block *, struct key *, - struct afs_iget_data *, struct afs_status_cb *, - struct afs_cb_interest *, - struct afs_vnode *); +extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); +extern struct inode *afs_root_iget(struct super_block *, struct key *); extern void afs_zap_data(struct afs_vnode *); extern bool afs_check_validity(struct afs_vnode *); extern int afs_validate(struct afs_vnode *, struct key *); @@ -1104,11 +1157,8 @@ static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} /* * rotate.c */ -extern bool afs_begin_vnode_operation(struct afs_fs_cursor *, struct afs_vnode *, - struct key *, bool); -extern bool afs_select_fileserver(struct afs_fs_cursor *); -extern bool afs_select_current_fileserver(struct afs_fs_cursor *); -extern int afs_end_vnode_operation(struct afs_fs_cursor *); +extern bool afs_select_fileserver(struct afs_operation *); +extern void afs_dump_edestaddrreq(const struct afs_operation *); /* * rxrpc.c @@ -1128,12 +1178,17 @@ extern void afs_flat_call_destructor(struct afs_call *); extern void afs_send_empty_reply(struct afs_call *); extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); extern int afs_extract_data(struct afs_call *, bool); -extern int afs_protocol_error(struct afs_call *, int, enum afs_eproto_cause); +extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); -static inline void afs_set_fc_call(struct afs_call *call, struct afs_fs_cursor *fc) +static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, + gfp_t gfp) { - call->intr = fc->flags & AFS_FS_CURSOR_INTR; - fc->type = call->type; + op->call = call; + op->type = call->type; + call->op = op; + call->key = op->key; + call->intr = !(op->flags & AFS_OPERATION_UNINTR); + afs_make_call(&op->ac, call, gfp); } static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) @@ -1241,13 +1296,33 @@ extern spinlock_t afs_server_peer_lock; extern struct afs_server *afs_find_server(struct afs_net *, const struct sockaddr_rxrpc *); extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); -extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *); +extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); +extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace); +extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace); +extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace); extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); extern void afs_manage_servers(struct work_struct *); extern void afs_servers_timer(struct timer_list *); +extern void afs_fs_probe_timer(struct timer_list *); extern void __net_exit afs_purge_servers(struct afs_net *); -extern bool afs_check_server_record(struct afs_fs_cursor *, struct afs_server *); +extern bool afs_check_server_record(struct afs_operation *, struct afs_server *); + +static inline void afs_inc_servers_outstanding(struct afs_net *net) +{ + atomic_inc(&net->servers_outstanding); +} + +static inline void afs_dec_servers_outstanding(struct afs_net *net) +{ + if (atomic_dec_and_test(&net->servers_outstanding)) + wake_up_var(&net->servers_outstanding); +} + +static inline bool afs_is_probing_server(struct afs_server *server) +{ + return list_empty(&server->probe_link); +} /* * server_list.c @@ -1279,6 +1354,12 @@ extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uu extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, struct key *, struct afs_vlserver *, unsigned int); extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); +extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); + +/* + * vl_alias.c + */ +extern int afs_cell_detect_alias(struct afs_cell *, struct key *); /* * vl_probe.c @@ -1322,18 +1403,12 @@ extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, /* * volume.c */ -static inline struct afs_volume *__afs_get_volume(struct afs_volume *volume) -{ - if (volume) - atomic_inc(&volume->usage); - return volume; -} - extern struct afs_volume *afs_create_volume(struct afs_fs_context *); extern void afs_activate_volume(struct afs_volume *); extern void afs_deactivate_volume(struct afs_volume *); -extern void afs_put_volume(struct afs_cell *, struct afs_volume *); -extern int afs_check_volume_status(struct afs_volume *, struct afs_fs_cursor *); +extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); +extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace); +extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); /* * write.c @@ -1362,36 +1437,24 @@ extern ssize_t afs_listxattr(struct dentry *, char *, size_t); /* * yfsclient.c */ -extern int yfs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_status_cb *, - struct afs_volsync *); -extern int yfs_fs_fetch_data(struct afs_fs_cursor *, struct afs_status_cb *, struct afs_read *); -extern int yfs_fs_create_file(struct afs_fs_cursor *, const char *, umode_t, struct afs_status_cb *, - struct afs_fid *, struct afs_status_cb *); -extern int yfs_fs_make_dir(struct afs_fs_cursor *, const char *, umode_t, struct afs_status_cb *, - struct afs_fid *, struct afs_status_cb *); -extern int yfs_fs_remove_file2(struct afs_fs_cursor *, struct afs_vnode *, const char *, - struct afs_status_cb *, struct afs_status_cb *); -extern int yfs_fs_remove(struct afs_fs_cursor *, struct afs_vnode *, const char *, bool, - struct afs_status_cb *); -extern int yfs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *, - struct afs_status_cb *, struct afs_status_cb *); -extern int yfs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, - struct afs_status_cb *, struct afs_fid *, struct afs_status_cb *); -extern int yfs_fs_rename(struct afs_fs_cursor *, const char *, struct afs_vnode *, const char *, - struct afs_status_cb *, struct afs_status_cb *); -extern int yfs_fs_store_data(struct afs_fs_cursor *, struct address_space *, - pgoff_t, pgoff_t, unsigned, unsigned, struct afs_status_cb *); -extern int yfs_fs_setattr(struct afs_fs_cursor *, struct iattr *, struct afs_status_cb *); -extern int yfs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *); -extern int yfs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t, struct afs_status_cb *); -extern int yfs_fs_extend_lock(struct afs_fs_cursor *, struct afs_status_cb *); -extern int yfs_fs_release_lock(struct afs_fs_cursor *, struct afs_status_cb *); -extern int yfs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *, - struct afs_fid *, struct afs_status_cb *, - struct afs_volsync *); -extern int yfs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *, - struct afs_fid *, struct afs_status_cb *, - unsigned int, struct afs_volsync *); +extern void yfs_fs_fetch_file_status(struct afs_operation *); +extern void yfs_fs_fetch_data(struct afs_operation *); +extern void yfs_fs_create_file(struct afs_operation *); +extern void yfs_fs_make_dir(struct afs_operation *); +extern void yfs_fs_remove_file2(struct afs_operation *); +extern void yfs_fs_remove_file(struct afs_operation *); +extern void yfs_fs_remove_dir(struct afs_operation *); +extern void yfs_fs_link(struct afs_operation *); +extern void yfs_fs_symlink(struct afs_operation *); +extern void yfs_fs_rename(struct afs_operation *); +extern void yfs_fs_store_data(struct afs_operation *); +extern void yfs_fs_setattr(struct afs_operation *); +extern void yfs_fs_get_volume_status(struct afs_operation *); +extern void yfs_fs_set_lock(struct afs_operation *); +extern void yfs_fs_extend_lock(struct afs_operation *); +extern void yfs_fs_release_lock(struct afs_operation *); +extern void yfs_fs_fetch_status(struct afs_operation *); +extern void yfs_fs_inline_bulk_status(struct afs_operation *); struct yfs_acl { struct afs_acl *acl; /* Dir/file/symlink ACL */ @@ -1404,10 +1467,8 @@ struct yfs_acl { }; extern void yfs_free_opaque_acl(struct yfs_acl *); -extern struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *, struct yfs_acl *, - struct afs_status_cb *); -extern int yfs_fs_store_opaque_acl2(struct afs_fs_cursor *, const struct afs_acl *, - struct afs_status_cb *); +extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); +extern void yfs_fs_store_opaque_acl2(struct afs_operation *); /* * Miscellaneous inline functions. @@ -1422,15 +1483,29 @@ static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) return &vnode->vfs_inode; } -static inline void afs_check_for_remote_deletion(struct afs_fs_cursor *fc, +static inline void afs_check_for_remote_deletion(struct afs_operation *op, struct afs_vnode *vnode) { - if (fc->ac.error == -ENOENT) { + if (op->error == -ENOENT) { set_bit(AFS_VNODE_DELETED, &vnode->flags); afs_break_callback(vnode, afs_cb_break_for_deleted); } } +/* + * Note that a dentry got changed. We need to set d_fsdata to the data version + * number derived from the result of the operation. It doesn't matter if + * d_fsdata goes backwards as we'll just revalidate. + */ +static inline void afs_update_dentry_version(struct afs_operation *op, + struct afs_vnode_param *dir_vp, + struct dentry *dentry) +{ + if (!op->error) + dentry->d_fsdata = + (void *)(unsigned long)dir_vp->scb.status.data_version; +} + static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) { trace_afs_io_error(call->debug_id, -EIO, where); diff --git a/fs/afs/main.c b/fs/afs/main.c index c9c45d7..9c79c91 100644 --- a/fs/afs/main.c +++ b/fs/afs/main.c @@ -82,12 +82,14 @@ static int __net_init afs_net_init(struct net *net_ns) INIT_WORK(&net->cells_manager, afs_manage_cells); timer_setup(&net->cells_timer, afs_cells_timer, 0); + mutex_init(&net->cells_alias_lock); mutex_init(&net->proc_cells_lock); INIT_HLIST_HEAD(&net->proc_cells); seqlock_init(&net->fs_lock); net->fs_servers = RB_ROOT; - INIT_LIST_HEAD(&net->fs_updates); + INIT_LIST_HEAD(&net->fs_probe_fast); + INIT_LIST_HEAD(&net->fs_probe_slow); INIT_HLIST_HEAD(&net->fs_proc); INIT_HLIST_HEAD(&net->fs_addresses4); @@ -96,6 +98,8 @@ static int __net_init afs_net_init(struct net *net_ns) INIT_WORK(&net->fs_manager, afs_manage_servers); timer_setup(&net->fs_timer, afs_servers_timer, 0); + INIT_WORK(&net->fs_prober, afs_fs_probe_dispatcher); + timer_setup(&net->fs_probe_timer, afs_fs_probe_timer, 0); ret = -ENOMEM; sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL); diff --git a/fs/afs/proc.c b/fs/afs/proc.c index 468e171..22d00cf 100644 --- a/fs/afs/proc.c +++ b/fs/afs/proc.c @@ -38,7 +38,7 @@ static int afs_proc_cells_show(struct seq_file *m, void *v) if (v == SEQ_START_TOKEN) { /* display header on line 1 */ - seq_puts(m, "USE TTL SV NAME\n"); + seq_puts(m, "USE TTL SV ST NAME\n"); return 0; } @@ -46,10 +46,11 @@ static int afs_proc_cells_show(struct seq_file *m, void *v) vllist = rcu_dereference(cell->vl_servers); /* display one cell per line on subsequent lines */ - seq_printf(m, "%3u %6lld %2u %s\n", + seq_printf(m, "%3u %6lld %2u %2u %s\n", atomic_read(&cell->usage), cell->dns_expiry - ktime_get_real_seconds(), vllist->nr_servers, + cell->state, cell->name); return 0; } @@ -208,11 +209,10 @@ static const char afs_vol_types[3][3] = { */ static int afs_proc_cell_volumes_show(struct seq_file *m, void *v) { - struct afs_cell *cell = PDE_DATA(file_inode(m->file)); - struct afs_volume *vol = list_entry(v, struct afs_volume, proc_link); + struct afs_volume *vol = hlist_entry(v, struct afs_volume, proc_link); /* Display header on line 1 */ - if (v == &cell->proc_volumes) { + if (v == SEQ_START_TOKEN) { seq_puts(m, "USE VID TY NAME\n"); return 0; } @@ -230,8 +230,8 @@ static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos) { struct afs_cell *cell = PDE_DATA(file_inode(m->file)); - read_lock(&cell->proc_lock); - return seq_list_start_head(&cell->proc_volumes, *_pos); + rcu_read_lock(); + return seq_hlist_start_head_rcu(&cell->proc_volumes, *_pos); } static void *afs_proc_cell_volumes_next(struct seq_file *m, void *v, @@ -239,15 +239,13 @@ static void *afs_proc_cell_volumes_next(struct seq_file *m, void *v, { struct afs_cell *cell = PDE_DATA(file_inode(m->file)); - return seq_list_next(v, &cell->proc_volumes, _pos); + return seq_hlist_next_rcu(v, &cell->proc_volumes, _pos); } static void afs_proc_cell_volumes_stop(struct seq_file *m, void *v) __releases(cell->proc_lock) { - struct afs_cell *cell = PDE_DATA(file_inode(m->file)); - - read_unlock(&cell->proc_lock); + rcu_read_unlock(); } static const struct seq_operations afs_proc_cell_volumes_ops = { @@ -378,20 +376,26 @@ static int afs_proc_servers_show(struct seq_file *m, void *v) int i; if (v == SEQ_START_TOKEN) { - seq_puts(m, "UUID USE ADDR\n"); + seq_puts(m, "UUID REF ACT\n"); return 0; } server = list_entry(v, struct afs_server, proc_link); alist = rcu_dereference(server->addresses); - seq_printf(m, "%pU %3d %pISpc%s\n", + seq_printf(m, "%pU %3d %3d\n", &server->uuid, - atomic_read(&server->usage), - &alist->addrs[0].transport, - alist->preferred == 0 ? "*" : ""); - for (i = 1; i < alist->nr_addrs; i++) - seq_printf(m, " %pISpc%s\n", - &alist->addrs[i].transport, + atomic_read(&server->ref), + atomic_read(&server->active)); + seq_printf(m, " - info: fl=%lx rtt=%u brk=%x\n", + server->flags, server->rtt, server->cb_s_break); + seq_printf(m, " - probe: last=%d out=%d\n", + (int)(jiffies - server->probed_at) / HZ, + atomic_read(&server->probe_outstanding)); + seq_printf(m, " - ALIST v=%u rsp=%lx f=%lx\n", + alist->version, alist->responded, alist->failed); + for (i = 0; i < alist->nr_addrs; i++) + seq_printf(m, " [%x] %pISpc%s\n", + i, &alist->addrs[i].transport, alist->preferred == i ? "*" : ""); return 0; } diff --git a/fs/afs/protocol_yfs.h b/fs/afs/protocol_yfs.h index 32be9c6..b5bd03b 100644 --- a/fs/afs/protocol_yfs.h +++ b/fs/afs/protocol_yfs.h @@ -8,7 +8,7 @@ #define YFS_FS_SERVICE 2500 #define YFS_CM_SERVICE 2501 -#define YFSCBMAX 1024 +#define YFSCBMAX 1024 enum YFS_CM_Operations { YFSCBProbe = 206, /* probe client */ diff --git a/fs/afs/rotate.c b/fs/afs/rotate.c index 2a3305e..6a0935c 100644 --- a/fs/afs/rotate.c +++ b/fs/afs/rotate.c @@ -15,60 +15,32 @@ #include "afs_fs.h" /* - * Begin an operation on the fileserver. - * - * Fileserver operations are serialised on the server by vnode, so we serialise - * them here also using the io_lock. - */ -bool afs_begin_vnode_operation(struct afs_fs_cursor *fc, struct afs_vnode *vnode, - struct key *key, bool intr) -{ - memset(fc, 0, sizeof(*fc)); - fc->vnode = vnode; - fc->key = key; - fc->ac.error = SHRT_MAX; - fc->error = -EDESTADDRREQ; - - if (intr) { - fc->flags |= AFS_FS_CURSOR_INTR; - if (mutex_lock_interruptible(&vnode->io_lock) < 0) { - fc->error = -EINTR; - fc->flags |= AFS_FS_CURSOR_STOP; - return false; - } - } else { - mutex_lock(&vnode->io_lock); - } - - if (vnode->lock_state != AFS_VNODE_LOCK_NONE) - fc->flags |= AFS_FS_CURSOR_CUR_ONLY; - return true; -} - -/* * Begin iteration through a server list, starting with the vnode's last used * server if possible, or the last recorded good server if not. */ -static bool afs_start_fs_iteration(struct afs_fs_cursor *fc, +static bool afs_start_fs_iteration(struct afs_operation *op, struct afs_vnode *vnode) { - struct afs_cb_interest *cbi; + struct afs_server *server; + void *cb_server; int i; - read_lock(&vnode->volume->servers_lock); - fc->server_list = afs_get_serverlist(vnode->volume->servers); - read_unlock(&vnode->volume->servers_lock); + read_lock(&op->volume->servers_lock); + op->server_list = afs_get_serverlist( + rcu_dereference_protected(op->volume->servers, + lockdep_is_held(&op->volume->servers_lock))); + read_unlock(&op->volume->servers_lock); - fc->untried = (1UL << fc->server_list->nr_servers) - 1; - fc->index = READ_ONCE(fc->server_list->preferred); + op->untried = (1UL << op->server_list->nr_servers) - 1; + op->index = READ_ONCE(op->server_list->preferred); - cbi = rcu_dereference_protected(vnode->cb_interest, - lockdep_is_held(&vnode->io_lock)); - if (cbi) { + cb_server = vnode->cb_server; + if (cb_server) { /* See if the vnode's preferred record is still available */ - for (i = 0; i < fc->server_list->nr_servers; i++) { - if (fc->server_list->servers[i].cb_interest == cbi) { - fc->index = i; + for (i = 0; i < op->server_list->nr_servers; i++) { + server = op->server_list->servers[i].server; + if (server == cb_server) { + op->index = i; goto found_interest; } } @@ -77,21 +49,18 @@ static bool afs_start_fs_iteration(struct afs_fs_cursor *fc, * serving this vnode, then we can't switch to another server * and have to return an error. */ - if (fc->flags & AFS_FS_CURSOR_CUR_ONLY) { - fc->error = -ESTALE; + if (op->flags & AFS_OPERATION_CUR_ONLY) { + op->error = -ESTALE; return false; } /* Note that the callback promise is effectively broken */ write_seqlock(&vnode->cb_lock); - ASSERTCMP(cbi, ==, rcu_access_pointer(vnode->cb_interest)); - rcu_assign_pointer(vnode->cb_interest, NULL); + ASSERTCMP(cb_server, ==, vnode->cb_server); + vnode->cb_server = NULL; if (test_and_clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags)) vnode->cb_break++; write_sequnlock(&vnode->cb_lock); - - afs_put_cb_interest(afs_v2net(vnode), cbi); - cbi = NULL; } found_interest: @@ -118,12 +87,12 @@ static void afs_busy(struct afs_volume *volume, u32 abort_code) /* * Sleep and retry the operation to the same fileserver. */ -static bool afs_sleep_and_retry(struct afs_fs_cursor *fc) +static bool afs_sleep_and_retry(struct afs_operation *op) { - if (fc->flags & AFS_FS_CURSOR_INTR) { + if (!(op->flags & AFS_OPERATION_UNINTR)) { msleep_interruptible(1000); if (signal_pending(current)) { - fc->error = -ERESTARTSYS; + op->error = -ERESTARTSYS; return false; } } else { @@ -137,26 +106,26 @@ static bool afs_sleep_and_retry(struct afs_fs_cursor *fc) * Select the fileserver to use. May be called multiple times to rotate * through the fileservers. */ -bool afs_select_fileserver(struct afs_fs_cursor *fc) +bool afs_select_fileserver(struct afs_operation *op) { struct afs_addr_list *alist; struct afs_server *server; - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode *vnode = op->file[0].vnode; struct afs_error e; u32 rtt; - int error = fc->ac.error, i; + int error = op->ac.error, i; _enter("%lx[%d],%lx[%d],%d,%d", - fc->untried, fc->index, - fc->ac.tried, fc->ac.index, - error, fc->ac.abort_code); + op->untried, op->index, + op->ac.tried, op->ac.index, + error, op->ac.abort_code); - if (fc->flags & AFS_FS_CURSOR_STOP) { + if (op->flags & AFS_OPERATION_STOP) { _leave(" = f [stopped]"); return false; } - fc->nr_iterations++; + op->nr_iterations++; /* Evaluate the result of the previous operation, if there was one. */ switch (error) { @@ -166,8 +135,8 @@ bool afs_select_fileserver(struct afs_fs_cursor *fc) case 0: default: /* Success or local failure. Stop. */ - fc->error = error; - fc->flags |= AFS_FS_CURSOR_STOP; + op->error = error; + op->flags |= AFS_OPERATION_STOP; _leave(" = f [okay/local %d]", error); return false; @@ -175,42 +144,42 @@ bool afs_select_fileserver(struct afs_fs_cursor *fc) /* The far side rejected the operation on some grounds. This * might involve the server being busy or the volume having been moved. */ - switch (fc->ac.abort_code) { + switch (op->ac.abort_code) { case VNOVOL: /* This fileserver doesn't know about the volume. * - May indicate that the VL is wrong - retry once and compare * the results. * - May indicate that the fileserver couldn't attach to the vol. */ - if (fc->flags & AFS_FS_CURSOR_VNOVOL) { - fc->error = -EREMOTEIO; + if (op->flags & AFS_OPERATION_VNOVOL) { + op->error = -EREMOTEIO; goto next_server; } - write_lock(&vnode->volume->servers_lock); - fc->server_list->vnovol_mask |= 1 << fc->index; - write_unlock(&vnode->volume->servers_lock); + write_lock(&op->volume->servers_lock); + op->server_list->vnovol_mask |= 1 << op->index; + write_unlock(&op->volume->servers_lock); - set_bit(AFS_VOLUME_NEEDS_UPDATE, &vnode->volume->flags); - error = afs_check_volume_status(vnode->volume, fc); + set_bit(AFS_VOLUME_NEEDS_UPDATE, &op->volume->flags); + error = afs_check_volume_status(op->volume, op); if (error < 0) goto failed_set_error; - if (test_bit(AFS_VOLUME_DELETED, &vnode->volume->flags)) { - fc->error = -ENOMEDIUM; + if (test_bit(AFS_VOLUME_DELETED, &op->volume->flags)) { + op->error = -ENOMEDIUM; goto failed; } /* If the server list didn't change, then assume that * it's the fileserver having trouble. */ - if (vnode->volume->servers == fc->server_list) { - fc->error = -EREMOTEIO; + if (rcu_access_pointer(op->volume->servers) == op->server_list) { + op->error = -EREMOTEIO; goto next_server; } /* Try again */ - fc->flags |= AFS_FS_CURSOR_VNOVOL; + op->flags |= AFS_OPERATION_VNOVOL; _leave(" = t [vnovol]"); return true; @@ -220,20 +189,20 @@ bool afs_select_fileserver(struct afs_fs_cursor *fc) case VONLINE: case VDISKFULL: case VOVERQUOTA: - fc->error = afs_abort_to_error(fc->ac.abort_code); + op->error = afs_abort_to_error(op->ac.abort_code); goto next_server; case VOFFLINE: - if (!test_and_set_bit(AFS_VOLUME_OFFLINE, &vnode->volume->flags)) { - afs_busy(vnode->volume, fc->ac.abort_code); - clear_bit(AFS_VOLUME_BUSY, &vnode->volume->flags); + if (!test_and_set_bit(AFS_VOLUME_OFFLINE, &op->volume->flags)) { + afs_busy(op->volume, op->ac.abort_code); + clear_bit(AFS_VOLUME_BUSY, &op->volume->flags); } - if (fc->flags & AFS_FS_CURSOR_NO_VSLEEP) { - fc->error = -EADV; + if (op->flags & AFS_OPERATION_NO_VSLEEP) { + op->error = -EADV; goto failed; } - if (fc->flags & AFS_FS_CURSOR_CUR_ONLY) { - fc->error = -ESTALE; + if (op->flags & AFS_OPERATION_CUR_ONLY) { + op->error = -ESTALE; goto failed; } goto busy; @@ -244,17 +213,17 @@ bool afs_select_fileserver(struct afs_fs_cursor *fc) /* Retry after going round all the servers unless we * have a file lock we need to maintain. */ - if (fc->flags & AFS_FS_CURSOR_NO_VSLEEP) { - fc->error = -EBUSY; + if (op->flags & AFS_OPERATION_NO_VSLEEP) { + op->error = -EBUSY; goto failed; } - if (!test_and_set_bit(AFS_VOLUME_BUSY, &vnode->volume->flags)) { - afs_busy(vnode->volume, fc->ac.abort_code); - clear_bit(AFS_VOLUME_OFFLINE, &vnode->volume->flags); + if (!test_and_set_bit(AFS_VOLUME_BUSY, &op->volume->flags)) { + afs_busy(op->volume, op->ac.abort_code); + clear_bit(AFS_VOLUME_OFFLINE, &op->volume->flags); } busy: - if (fc->flags & AFS_FS_CURSOR_CUR_ONLY) { - if (!afs_sleep_and_retry(fc)) + if (op->flags & AFS_OPERATION_CUR_ONLY) { + if (!afs_sleep_and_retry(op)) goto failed; /* Retry with same server & address */ @@ -262,7 +231,7 @@ bool afs_select_fileserver(struct afs_fs_cursor *fc) return true; } - fc->flags |= AFS_FS_CURSOR_VBUSY; + op->flags |= AFS_OPERATION_VBUSY; goto next_server; case VMOVED: @@ -273,15 +242,15 @@ bool afs_select_fileserver(struct afs_fs_cursor *fc) * We also limit the number of VMOVED hops we will * honour, just in case someone sets up a loop. */ - if (fc->flags & AFS_FS_CURSOR_VMOVED) { - fc->error = -EREMOTEIO; + if (op->flags & AFS_OPERATION_VMOVED) { + op->error = -EREMOTEIO; goto failed; } - fc->flags |= AFS_FS_CURSOR_VMOVED; + op->flags |= AFS_OPERATION_VMOVED; - set_bit(AFS_VOLUME_WAIT, &vnode->volume->flags); - set_bit(AFS_VOLUME_NEEDS_UPDATE, &vnode->volume->flags); - error = afs_check_volume_status(vnode->volume, fc); + set_bit(AFS_VOLUME_WAIT, &op->volume->flags); + set_bit(AFS_VOLUME_NEEDS_UPDATE, &op->volume->flags); + error = afs_check_volume_status(op->volume, op); if (error < 0) goto failed_set_error; @@ -294,23 +263,23 @@ bool afs_select_fileserver(struct afs_fs_cursor *fc) * * TODO: Retry a few times with sleeps. */ - if (vnode->volume->servers == fc->server_list) { - fc->error = -ENOMEDIUM; + if (rcu_access_pointer(op->volume->servers) == op->server_list) { + op->error = -ENOMEDIUM; goto failed; } goto restart_from_beginning; default: - clear_bit(AFS_VOLUME_OFFLINE, &vnode->volume->flags); - clear_bit(AFS_VOLUME_BUSY, &vnode->volume->flags); - fc->error = afs_abort_to_error(fc->ac.abort_code); + clear_bit(AFS_VOLUME_OFFLINE, &op->volume->flags); + clear_bit(AFS_VOLUME_BUSY, &op->volume->flags); + op->error = afs_abort_to_error(op->ac.abort_code); goto failed; } case -ETIMEDOUT: case -ETIME: - if (fc->error != -EDESTADDRREQ) + if (op->error != -EDESTADDRREQ) goto iterate_address; /* Fall through */ case -ERFKILL: @@ -320,103 +289,94 @@ bool afs_select_fileserver(struct afs_fs_cursor *fc) case -EHOSTDOWN: case -ECONNREFUSED: _debug("no conn"); - fc->error = error; + op->error = error; goto iterate_address; case -ECONNRESET: _debug("call reset"); - fc->error = error; + op->error = error; goto failed; } restart_from_beginning: _debug("restart"); - afs_end_cursor(&fc->ac); - afs_put_cb_interest(afs_v2net(vnode), fc->cbi); - fc->cbi = NULL; - afs_put_serverlist(afs_v2net(vnode), fc->server_list); - fc->server_list = NULL; + afs_end_cursor(&op->ac); + op->server = NULL; + afs_put_serverlist(op->net, op->server_list); + op->server_list = NULL; start: _debug("start"); /* See if we need to do an update of the volume record. Note that the * volume may have moved or even have been deleted. */ - error = afs_check_volume_status(vnode->volume, fc); + error = afs_check_volume_status(op->volume, op); if (error < 0) goto failed_set_error; - if (!afs_start_fs_iteration(fc, vnode)) + if (!afs_start_fs_iteration(op, vnode)) goto failed; - _debug("__ VOL %llx __", vnode->volume->vid); - error = afs_probe_fileservers(afs_v2net(vnode), fc->key, fc->server_list); - if (error < 0) - goto failed_set_error; + _debug("__ VOL %llx __", op->volume->vid); pick_server: - _debug("pick [%lx]", fc->untried); + _debug("pick [%lx]", op->untried); - error = afs_wait_for_fs_probes(fc->server_list, fc->untried); + error = afs_wait_for_fs_probes(op->server_list, op->untried); if (error < 0) goto failed_set_error; /* Pick the untried server with the lowest RTT. If we have outstanding * callbacks, we stick with the server we're already using if we can. */ - if (fc->cbi) { - _debug("cbi %u", fc->index); - if (test_bit(fc->index, &fc->untried)) + if (op->server) { + _debug("server %u", op->index); + if (test_bit(op->index, &op->untried)) goto selected_server; - afs_put_cb_interest(afs_v2net(vnode), fc->cbi); - fc->cbi = NULL; - _debug("nocbi"); + op->server = NULL; + _debug("no server"); } - fc->index = -1; + op->index = -1; rtt = U32_MAX; - for (i = 0; i < fc->server_list->nr_servers; i++) { - struct afs_server *s = fc->server_list->servers[i].server; + for (i = 0; i < op->server_list->nr_servers; i++) { + struct afs_server *s = op->server_list->servers[i].server; - if (!test_bit(i, &fc->untried) || !s->probe.responded) + if (!test_bit(i, &op->untried) || + !test_bit(AFS_SERVER_FL_RESPONDING, &s->flags)) continue; if (s->probe.rtt < rtt) { - fc->index = i; + op->index = i; rtt = s->probe.rtt; } } - if (fc->index == -1) + if (op->index == -1) goto no_more_servers; selected_server: - _debug("use %d", fc->index); - __clear_bit(fc->index, &fc->untried); + _debug("use %d", op->index); + __clear_bit(op->index, &op->untried); /* We're starting on a different fileserver from the list. We need to * check it, create a callback intercept, find its address list and * probe its capabilities before we use it. */ - ASSERTCMP(fc->ac.alist, ==, NULL); - server = fc->server_list->servers[fc->index].server; + ASSERTCMP(op->ac.alist, ==, NULL); + server = op->server_list->servers[op->index].server; - if (!afs_check_server_record(fc, server)) + if (!afs_check_server_record(op, server)) goto failed; _debug("USING SERVER: %pU", &server->uuid); - /* Make sure we've got a callback interest record for this server. We - * have to link it in before we send the request as we can be sent a - * break request before we've finished decoding the reply and - * installing the vnode. - */ - error = afs_register_server_cb_interest(vnode, fc->server_list, - fc->index); - if (error < 0) - goto failed_set_error; - - fc->cbi = afs_get_cb_interest( - rcu_dereference_protected(vnode->cb_interest, - lockdep_is_held(&vnode->io_lock))); + op->flags |= AFS_OPERATION_RETRY_SERVER; + op->server = server; + if (vnode->cb_server != server) { + vnode->cb_server = server; + vnode->cb_s_break = server->cb_s_break; + vnode->cb_v_break = vnode->volume->cb_v_break; + clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); + } read_lock(&server->fs_lock); alist = rcu_dereference_protected(server->addresses, @@ -424,44 +384,68 @@ selected_server: afs_get_addrlist(alist); read_unlock(&server->fs_lock); - memset(&fc->ac, 0, sizeof(fc->ac)); +retry_server: + memset(&op->ac, 0, sizeof(op->ac)); - if (!fc->ac.alist) - fc->ac.alist = alist; + if (!op->ac.alist) + op->ac.alist = alist; else afs_put_addrlist(alist); - fc->ac.index = -1; + op->ac.index = -1; iterate_address: - ASSERT(fc->ac.alist); + ASSERT(op->ac.alist); /* Iterate over the current server's address list to try and find an * address on which it will respond to us. */ - if (!afs_iterate_addresses(&fc->ac)) - goto next_server; + if (!afs_iterate_addresses(&op->ac)) + goto out_of_addresses; - _debug("address [%u] %u/%u", fc->index, fc->ac.index, fc->ac.alist->nr_addrs); + _debug("address [%u] %u/%u %pISp", + op->index, op->ac.index, op->ac.alist->nr_addrs, + &op->ac.alist->addrs[op->ac.index].transport); _leave(" = t"); return true; +out_of_addresses: + /* We've now had a failure to respond on all of a server's addresses - + * immediately probe them again and consider retrying the server. + */ + afs_probe_fileserver(op->net, op->server); + if (op->flags & AFS_OPERATION_RETRY_SERVER) { + alist = op->ac.alist; + error = afs_wait_for_one_fs_probe( + op->server, !(op->flags & AFS_OPERATION_UNINTR)); + switch (error) { + case 0: + op->flags &= ~AFS_OPERATION_RETRY_SERVER; + goto retry_server; + case -ERESTARTSYS: + goto failed_set_error; + case -ETIME: + case -EDESTADDRREQ: + goto next_server; + } + } + next_server: _debug("next"); - afs_end_cursor(&fc->ac); + afs_end_cursor(&op->ac); goto pick_server; no_more_servers: /* That's all the servers poked to no good effect. Try again if some * of them were busy. */ - if (fc->flags & AFS_FS_CURSOR_VBUSY) + if (op->flags & AFS_OPERATION_VBUSY) goto restart_from_beginning; e.error = -EDESTADDRREQ; e.responded = false; - for (i = 0; i < fc->server_list->nr_servers; i++) { - struct afs_server *s = fc->server_list->servers[i].server; + for (i = 0; i < op->server_list->nr_servers; i++) { + struct afs_server *s = op->server_list->servers[i].server; afs_prioritise_error(&e, READ_ONCE(s->probe.error), s->probe.abort_code); @@ -470,101 +454,18 @@ no_more_servers: error = e.error; failed_set_error: - fc->error = error; + op->error = error; failed: - fc->flags |= AFS_FS_CURSOR_STOP; - afs_end_cursor(&fc->ac); - _leave(" = f [failed %d]", fc->error); - return false; -} - -/* - * Select the same fileserver we used for a vnode before and only that - * fileserver. We use this when we have a lock on that file, which is backed - * only by the fileserver we obtained it from. - */ -bool afs_select_current_fileserver(struct afs_fs_cursor *fc) -{ - struct afs_vnode *vnode = fc->vnode; - struct afs_cb_interest *cbi; - struct afs_addr_list *alist; - int error = fc->ac.error; - - _enter(""); - - cbi = rcu_dereference_protected(vnode->cb_interest, - lockdep_is_held(&vnode->io_lock)); - - switch (error) { - case SHRT_MAX: - if (!cbi) { - fc->error = -ESTALE; - fc->flags |= AFS_FS_CURSOR_STOP; - return false; - } - - fc->cbi = afs_get_cb_interest(cbi); - - read_lock(&cbi->server->fs_lock); - alist = rcu_dereference_protected(cbi->server->addresses, - lockdep_is_held(&cbi->server->fs_lock)); - afs_get_addrlist(alist); - read_unlock(&cbi->server->fs_lock); - if (!alist) { - fc->error = -ESTALE; - fc->flags |= AFS_FS_CURSOR_STOP; - return false; - } - - memset(&fc->ac, 0, sizeof(fc->ac)); - fc->ac.alist = alist; - fc->ac.index = -1; - goto iterate_address; - - case 0: - default: - /* Success or local failure. Stop. */ - fc->error = error; - fc->flags |= AFS_FS_CURSOR_STOP; - _leave(" = f [okay/local %d]", error); - return false; - - case -ECONNABORTED: - fc->error = afs_abort_to_error(fc->ac.abort_code); - fc->flags |= AFS_FS_CURSOR_STOP; - _leave(" = f [abort]"); - return false; - - case -ERFKILL: - case -EADDRNOTAVAIL: - case -ENETUNREACH: - case -EHOSTUNREACH: - case -EHOSTDOWN: - case -ECONNREFUSED: - case -ETIMEDOUT: - case -ETIME: - _debug("no conn"); - fc->error = error; - goto iterate_address; - } - -iterate_address: - /* Iterate over the current server's address list to try and find an - * address on which it will respond to us. - */ - if (afs_iterate_addresses(&fc->ac)) { - _leave(" = t"); - return true; - } - - afs_end_cursor(&fc->ac); + op->flags |= AFS_OPERATION_STOP; + afs_end_cursor(&op->ac); + _leave(" = f [failed %d]", op->error); return false; } /* * Dump cursor state in the case of the error being EDESTADDRREQ. */ -static void afs_dump_edestaddrreq(const struct afs_fs_cursor *fc) +void afs_dump_edestaddrreq(const struct afs_operation *op) { static int count; int i; @@ -576,13 +477,14 @@ static void afs_dump_edestaddrreq(const struct afs_fs_cursor *fc) rcu_read_lock(); pr_notice("EDESTADDR occurred\n"); - pr_notice("FC: cbb=%x cbb2=%x fl=%hx err=%hd\n", - fc->cb_break, fc->cb_break_2, fc->flags, fc->error); + pr_notice("FC: cbb=%x cbb2=%x fl=%x err=%hd\n", + op->file[0].cb_break_before, + op->file[1].cb_break_before, op->flags, op->error); pr_notice("FC: ut=%lx ix=%d ni=%u\n", - fc->untried, fc->index, fc->nr_iterations); + op->untried, op->index, op->nr_iterations); - if (fc->server_list) { - const struct afs_server_list *sl = fc->server_list; + if (op->server_list) { + const struct afs_server_list *sl = op->server_list; pr_notice("FC: SL nr=%u pr=%u vnov=%hx\n", sl->nr_servers, sl->preferred, sl->vnovol_mask); for (i = 0; i < sl->nr_servers; i++) { @@ -596,41 +498,16 @@ static void afs_dump_edestaddrreq(const struct afs_fs_cursor *fc) a->version, a->nr_ipv4, a->nr_addrs, a->max_addrs, a->preferred); - pr_notice("FC: - pr=%lx R=%lx F=%lx\n", - a->probed, a->responded, a->failed); - if (a == fc->ac.alist) + pr_notice("FC: - R=%lx F=%lx\n", + a->responded, a->failed); + if (a == op->ac.alist) pr_notice("FC: - current\n"); } } } pr_notice("AC: t=%lx ax=%u ac=%d er=%d r=%u ni=%u\n", - fc->ac.tried, fc->ac.index, fc->ac.abort_code, fc->ac.error, - fc->ac.responded, fc->ac.nr_iterations); + op->ac.tried, op->ac.index, op->ac.abort_code, op->ac.error, + op->ac.responded, op->ac.nr_iterations); rcu_read_unlock(); } - -/* - * Tidy up a filesystem cursor and unlock the vnode. - */ -int afs_end_vnode_operation(struct afs_fs_cursor *fc) -{ - struct afs_net *net = afs_v2net(fc->vnode); - - if (fc->error == -EDESTADDRREQ || - fc->error == -EADDRNOTAVAIL || - fc->error == -ENETUNREACH || - fc->error == -EHOSTUNREACH) - afs_dump_edestaddrreq(fc); - - mutex_unlock(&fc->vnode->io_lock); - - afs_end_cursor(&fc->ac); - afs_put_cb_interest(net, fc->cbi); - afs_put_serverlist(net, fc->server_list); - - if (fc->error == -ECONNABORTED) - fc->error = afs_abort_to_error(fc->ac.abort_code); - - return fc->error; -} diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c index e313dae..8fc8fb4 100644 --- a/fs/afs/rxrpc.c +++ b/fs/afs/rxrpc.c @@ -181,8 +181,7 @@ void afs_put_call(struct afs_call *call) if (call->type->destructor) call->type->destructor(call); - afs_put_server(call->net, call->server, afs_server_trace_put_call); - afs_put_cb_interest(call->net, call->cbi); + afs_unuse_server_notime(call->net, call->server, afs_server_trace_put_call); afs_put_addrlist(call->alist); kfree(call->request); @@ -281,18 +280,19 @@ static void afs_load_bvec(struct afs_call *call, struct msghdr *msg, struct bio_vec *bv, pgoff_t first, pgoff_t last, unsigned offset) { + struct afs_operation *op = call->op; struct page *pages[AFS_BVEC_MAX]; unsigned int nr, n, i, to, bytes = 0; nr = min_t(pgoff_t, last - first + 1, AFS_BVEC_MAX); - n = find_get_pages_contig(call->mapping, first, nr, pages); + n = find_get_pages_contig(op->store.mapping, first, nr, pages); ASSERTCMP(n, ==, nr); msg->msg_flags |= MSG_MORE; for (i = 0; i < nr; i++) { to = PAGE_SIZE; if (first + i >= last) { - to = call->last_to; + to = op->store.last_to; msg->msg_flags &= ~MSG_MORE; } bv[i].bv_page = pages[i]; @@ -322,13 +322,14 @@ static void afs_notify_end_request_tx(struct sock *sock, */ static int afs_send_pages(struct afs_call *call, struct msghdr *msg) { + struct afs_operation *op = call->op; struct bio_vec bv[AFS_BVEC_MAX]; unsigned int bytes, nr, loop, offset; - pgoff_t first = call->first, last = call->last; + pgoff_t first = op->store.first, last = op->store.last; int ret; - offset = call->first_offset; - call->first_offset = 0; + offset = op->store.first_offset; + op->store.first_offset = 0; do { afs_load_bvec(call, msg, bv, first, last, offset); @@ -338,7 +339,7 @@ static int afs_send_pages(struct afs_call *call, struct msghdr *msg) bytes = msg->msg_iter.count; nr = msg->msg_iter.nr_segs; - ret = rxrpc_kernel_send_data(call->net->socket, call->rxcall, msg, + ret = rxrpc_kernel_send_data(op->net->socket, call->rxcall, msg, bytes, afs_notify_end_request_tx); for (loop = 0; loop < nr; loop++) put_page(bv[loop].bv_page); @@ -348,7 +349,7 @@ static int afs_send_pages(struct afs_call *call, struct msghdr *msg) first += nr; } while (first <= last); - trace_afs_sent_pages(call, call->first, last, first, ret); + trace_afs_sent_pages(call, op->store.first, last, first, ret); return ret; } @@ -383,16 +384,18 @@ void afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call, gfp_t gfp) */ tx_total_len = call->request_size; if (call->send_pages) { - if (call->last == call->first) { - tx_total_len += call->last_to - call->first_offset; + struct afs_operation *op = call->op; + + if (op->store.last == op->store.first) { + tx_total_len += op->store.last_to - op->store.first_offset; } else { /* It looks mathematically like you should be able to * combine the following lines with the ones above, but * unsigned arithmetic is fun when it wraps... */ - tx_total_len += PAGE_SIZE - call->first_offset; - tx_total_len += call->last_to; - tx_total_len += (call->last - call->first - 1) * PAGE_SIZE; + tx_total_len += PAGE_SIZE - op->store.first_offset; + tx_total_len += op->store.last_to; + tx_total_len += (op->store.last - op->store.first - 1) * PAGE_SIZE; } } @@ -538,13 +541,15 @@ static void afs_deliver_to_call(struct afs_call *call) ret = call->type->deliver(call); state = READ_ONCE(call->state); + if (ret == 0 && call->unmarshalling_error) + ret = -EBADMSG; switch (ret) { case 0: afs_queue_call_work(call); if (state == AFS_CALL_CL_PROC_REPLY) { - if (call->cbi) + if (call->op) set_bit(AFS_SERVER_FL_MAY_HAVE_CB, - &call->cbi->server->flags); + &call->op->server->flags); goto call_complete; } ASSERTCMP(state, >, AFS_CALL_CL_PROC_REPLY); @@ -957,9 +962,11 @@ int afs_extract_data(struct afs_call *call, bool want_more) /* * Log protocol error production. */ -noinline int afs_protocol_error(struct afs_call *call, int error, +noinline int afs_protocol_error(struct afs_call *call, enum afs_eproto_cause cause) { - trace_afs_protocol_error(call, error, cause); - return error; + trace_afs_protocol_error(call, cause); + if (call) + call->unmarshalling_error = true; + return -EBADMSG; } diff --git a/fs/afs/security.c b/fs/afs/security.c index ce9de1e..90d8527 100644 --- a/fs/afs/security.c +++ b/fs/afs/security.c @@ -170,8 +170,7 @@ void afs_cache_permit(struct afs_vnode *vnode, struct key *key, break; } - if (afs_cb_is_broken(cb_break, vnode, - rcu_dereference(vnode->cb_interest))) { + if (afs_cb_is_broken(cb_break, vnode)) { changed = true; break; } @@ -201,7 +200,7 @@ void afs_cache_permit(struct afs_vnode *vnode, struct key *key, } } - if (afs_cb_is_broken(cb_break, vnode, rcu_dereference(vnode->cb_interest))) + if (afs_cb_is_broken(cb_break, vnode)) goto someone_else_changed_it; /* We need a ref on any permits list we want to copy as we'll have to @@ -281,8 +280,7 @@ found: rcu_read_lock(); spin_lock(&vnode->lock); zap = rcu_access_pointer(vnode->permit_cache); - if (!afs_cb_is_broken(cb_break, vnode, rcu_dereference(vnode->cb_interest)) && - zap == permits) + if (!afs_cb_is_broken(cb_break, vnode) && zap == permits) rcu_assign_pointer(vnode->permit_cache, replacement); else zap = replacement; diff --git a/fs/afs/server.c b/fs/afs/server.c index 11b90ac..039e348 100644 --- a/fs/afs/server.c +++ b/fs/afs/server.c @@ -12,19 +12,11 @@ #include "protocol_yfs.h" static unsigned afs_server_gc_delay = 10; /* Server record timeout in seconds */ -static unsigned afs_server_update_delay = 30; /* Time till VLDB recheck in secs */ static atomic_t afs_server_debug_id; -static void afs_inc_servers_outstanding(struct afs_net *net) -{ - atomic_inc(&net->servers_outstanding); -} - -static void afs_dec_servers_outstanding(struct afs_net *net) -{ - if (atomic_dec_and_test(&net->servers_outstanding)) - wake_up_var(&net->servers_outstanding); -} +static struct afs_server *afs_maybe_use_server(struct afs_server *, + enum afs_server_trace); +static void __afs_put_server(struct afs_net *, struct afs_server *); /* * Find a server by one of its addresses. @@ -41,7 +33,7 @@ struct afs_server *afs_find_server(struct afs_net *net, do { if (server) - afs_put_server(net, server, afs_server_trace_put_find_rsq); + afs_unuse_server_notime(net, server, afs_server_trace_put_find_rsq); server = NULL; read_seqbegin_or_lock(&net->fs_addr_lock, &seq); @@ -79,9 +71,9 @@ struct afs_server *afs_find_server(struct afs_net *net, } server = NULL; + continue; found: - if (server && !atomic_inc_not_zero(&server->usage)) - server = NULL; + server = afs_maybe_use_server(server, afs_server_trace_get_by_addr); } while (need_seqretry(&net->fs_addr_lock, seq)); @@ -92,7 +84,7 @@ struct afs_server *afs_find_server(struct afs_net *net, } /* - * Look up a server by its UUID + * Look up a server by its UUID and mark it active. */ struct afs_server *afs_find_server_by_uuid(struct afs_net *net, const uuid_t *uuid) { @@ -108,7 +100,7 @@ struct afs_server *afs_find_server_by_uuid(struct afs_net *net, const uuid_t *uu * changes. */ if (server) - afs_put_server(net, server, afs_server_trace_put_uuid_rsq); + afs_unuse_server(net, server, afs_server_trace_put_uuid_rsq); server = NULL; read_seqbegin_or_lock(&net->fs_lock, &seq); @@ -123,7 +115,7 @@ struct afs_server *afs_find_server_by_uuid(struct afs_net *net, const uuid_t *uu } else if (diff > 0) { p = p->rb_right; } else { - afs_get_server(server, afs_server_trace_get_by_uuid); + afs_use_server(server, afs_server_trace_get_by_uuid); break; } @@ -138,13 +130,16 @@ struct afs_server *afs_find_server_by_uuid(struct afs_net *net, const uuid_t *uu } /* - * Install a server record in the namespace tree + * Install a server record in the namespace tree. If there's a clash, we stick + * it into a list anchored on whichever afs_server struct is actually in the + * tree. */ -static struct afs_server *afs_install_server(struct afs_net *net, +static struct afs_server *afs_install_server(struct afs_cell *cell, struct afs_server *candidate) { const struct afs_addr_list *alist; - struct afs_server *server; + struct afs_server *server, *next; + struct afs_net *net = cell->net; struct rb_node **pp, *p; int diff; @@ -160,12 +155,30 @@ static struct afs_server *afs_install_server(struct afs_net *net, _debug("- consider %p", p); server = rb_entry(p, struct afs_server, uuid_rb); diff = memcmp(&candidate->uuid, &server->uuid, sizeof(uuid_t)); - if (diff < 0) + if (diff < 0) { pp = &(*pp)->rb_left; - else if (diff > 0) + } else if (diff > 0) { pp = &(*pp)->rb_right; - else - goto exists; + } else { + if (server->cell == cell) + goto exists; + + /* We have the same UUID representing servers in + * different cells. Append the new server to the list. + */ + for (;;) { + next = rcu_dereference_protected( + server->uuid_next, + lockdep_is_held(&net->fs_lock.lock)); + if (!next) + break; + server = next; + } + rcu_assign_pointer(server->uuid_next, candidate); + candidate->uuid_prev = server; + server = candidate; + goto added_dup; + } } server = candidate; @@ -173,6 +186,7 @@ static struct afs_server *afs_install_server(struct afs_net *net, rb_insert_color(&server->uuid_rb, &net->fs_servers); hlist_add_head_rcu(&server->proc_link, &net->fs_proc); +added_dup: write_seqlock(&net->fs_addr_lock); alist = rcu_dereference_protected(server->addresses, lockdep_is_held(&net->fs_addr_lock.lock)); @@ -199,13 +213,14 @@ exists: } /* - * allocate a new server record + * Allocate a new server record and mark it active. */ -static struct afs_server *afs_alloc_server(struct afs_net *net, +static struct afs_server *afs_alloc_server(struct afs_cell *cell, const uuid_t *uuid, struct afs_addr_list *alist) { struct afs_server *server; + struct afs_net *net = cell->net; _enter(""); @@ -213,20 +228,21 @@ static struct afs_server *afs_alloc_server(struct afs_net *net, if (!server) goto enomem; - atomic_set(&server->usage, 1); + atomic_set(&server->ref, 1); + atomic_set(&server->active, 1); server->debug_id = atomic_inc_return(&afs_server_debug_id); RCU_INIT_POINTER(server->addresses, alist); server->addr_version = alist->version; server->uuid = *uuid; - server->update_at = ktime_get_real_seconds() + afs_server_update_delay; rwlock_init(&server->fs_lock); - INIT_HLIST_HEAD(&server->cb_volumes); - rwlock_init(&server->cb_break_lock); init_waitqueue_head(&server->probe_wq); + INIT_LIST_HEAD(&server->probe_link); spin_lock_init(&server->probe_lock); + server->cell = cell; + server->rtt = UINT_MAX; afs_inc_servers_outstanding(net); - trace_afs_server(server, 1, afs_server_trace_alloc); + trace_afs_server(server, 1, 1, afs_server_trace_alloc); _leave(" = %p", server); return server; @@ -264,7 +280,7 @@ static struct afs_addr_list *afs_vl_lookup_addrs(struct afs_cell *cell, * Get or create a fileserver record. */ struct afs_server *afs_lookup_server(struct afs_cell *cell, struct key *key, - const uuid_t *uuid) + const uuid_t *uuid, u32 addr_version) { struct afs_addr_list *alist; struct afs_server *server, *candidate; @@ -272,26 +288,34 @@ struct afs_server *afs_lookup_server(struct afs_cell *cell, struct key *key, _enter("%p,%pU", cell->net, uuid); server = afs_find_server_by_uuid(cell->net, uuid); - if (server) + if (server) { + if (server->addr_version != addr_version) + set_bit(AFS_SERVER_FL_NEEDS_UPDATE, &server->flags); return server; + } alist = afs_vl_lookup_addrs(cell, key, uuid); if (IS_ERR(alist)) return ERR_CAST(alist); - candidate = afs_alloc_server(cell->net, uuid, alist); + candidate = afs_alloc_server(cell, uuid, alist); if (!candidate) { afs_put_addrlist(alist); return ERR_PTR(-ENOMEM); } - server = afs_install_server(cell->net, candidate); + server = afs_install_server(cell, candidate); if (server != candidate) { afs_put_addrlist(alist); kfree(candidate); + } else { + /* Immediately dispatch an asynchronous probe to each interface + * on the fileserver. This will make sure the repeat-probing + * service is started. + */ + afs_fs_probe_fileserver(cell->net, server, key, true); } - _leave(" = %p{%d}", server, atomic_read(&server->usage)); return server; } @@ -327,9 +351,38 @@ void afs_servers_timer(struct timer_list *timer) struct afs_server *afs_get_server(struct afs_server *server, enum afs_server_trace reason) { - unsigned int u = atomic_inc_return(&server->usage); + unsigned int u = atomic_inc_return(&server->ref); + + trace_afs_server(server, u, atomic_read(&server->active), reason); + return server; +} + +/* + * Try to get a reference on a server object. + */ +static struct afs_server *afs_maybe_use_server(struct afs_server *server, + enum afs_server_trace reason) +{ + unsigned int r = atomic_fetch_add_unless(&server->ref, 1, 0); + unsigned int a; + + if (r == 0) + return NULL; + + a = atomic_inc_return(&server->active); + trace_afs_server(server, r, a, reason); + return server; +} + +/* + * Get an active count on a server object. + */ +struct afs_server *afs_use_server(struct afs_server *server, enum afs_server_trace reason) +{ + unsigned int r = atomic_inc_return(&server->ref); + unsigned int a = atomic_inc_return(&server->active); - trace_afs_server(server, u, reason); + trace_afs_server(server, r, a, reason); return server; } @@ -344,32 +397,57 @@ void afs_put_server(struct afs_net *net, struct afs_server *server, if (!server) return; - server->put_time = ktime_get_real_seconds(); - - usage = atomic_dec_return(&server->usage); + usage = atomic_dec_return(&server->ref); + trace_afs_server(server, usage, atomic_read(&server->active), reason); + if (unlikely(usage == 0)) + __afs_put_server(net, server); +} - trace_afs_server(server, usage, reason); +/* + * Drop an active count on a server object without updating the last-unused + * time. + */ +void afs_unuse_server_notime(struct afs_net *net, struct afs_server *server, + enum afs_server_trace reason) +{ + if (server) { + unsigned int active = atomic_dec_return(&server->active); - if (likely(usage > 0)) - return; + if (active == 0) + afs_set_server_timer(net, afs_server_gc_delay); + afs_put_server(net, server, reason); + } +} - afs_set_server_timer(net, afs_server_gc_delay); +/* + * Drop an active count on a server object. + */ +void afs_unuse_server(struct afs_net *net, struct afs_server *server, + enum afs_server_trace reason) +{ + if (server) { + server->unuse_time = ktime_get_real_seconds(); + afs_unuse_server_notime(net, server, reason); + } } static void afs_server_rcu(struct rcu_head *rcu) { struct afs_server *server = container_of(rcu, struct afs_server, rcu); - trace_afs_server(server, atomic_read(&server->usage), - afs_server_trace_free); + trace_afs_server(server, atomic_read(&server->ref), + atomic_read(&server->active), afs_server_trace_free); afs_put_addrlist(rcu_access_pointer(server->addresses)); kfree(server); } -/* - * destroy a dead server - */ -static void afs_destroy_server(struct afs_net *net, struct afs_server *server) +static void __afs_put_server(struct afs_net *net, struct afs_server *server) +{ + call_rcu(&server->rcu, afs_server_rcu); + afs_dec_servers_outstanding(net); +} + +static void afs_give_up_callbacks(struct afs_net *net, struct afs_server *server) { struct afs_addr_list *alist = rcu_access_pointer(server->addresses); struct afs_addr_cursor ac = { @@ -378,19 +456,18 @@ static void afs_destroy_server(struct afs_net *net, struct afs_server *server) .error = 0, }; - trace_afs_server(server, atomic_read(&server->usage), - afs_server_trace_give_up_cb); + afs_fs_give_up_all_callbacks(net, server, &ac, NULL); +} +/* + * destroy a dead server + */ +static void afs_destroy_server(struct afs_net *net, struct afs_server *server) +{ if (test_bit(AFS_SERVER_FL_MAY_HAVE_CB, &server->flags)) - afs_fs_give_up_all_callbacks(net, server, &ac, NULL); + afs_give_up_callbacks(net, server); - wait_var_event(&server->probe_outstanding, - atomic_read(&server->probe_outstanding) == 0); - - trace_afs_server(server, atomic_read(&server->usage), - afs_server_trace_destroy); - call_rcu(&server->rcu, afs_server_rcu); - afs_dec_servers_outstanding(net); + afs_put_server(net, server, afs_server_trace_destroy); } /* @@ -398,32 +475,49 @@ static void afs_destroy_server(struct afs_net *net, struct afs_server *server) */ static void afs_gc_servers(struct afs_net *net, struct afs_server *gc_list) { - struct afs_server *server; - bool deleted; - int usage; + struct afs_server *server, *next, *prev; + int active; while ((server = gc_list)) { gc_list = server->gc_next; write_seqlock(&net->fs_lock); - usage = 1; - deleted = atomic_try_cmpxchg(&server->usage, &usage, 0); - trace_afs_server(server, usage, afs_server_trace_gc); - if (deleted) { - rb_erase(&server->uuid_rb, &net->fs_servers); - hlist_del_rcu(&server->proc_link); - } - write_sequnlock(&net->fs_lock); - if (deleted) { - write_seqlock(&net->fs_addr_lock); + active = atomic_read(&server->active); + if (active == 0) { + trace_afs_server(server, atomic_read(&server->ref), + active, afs_server_trace_gc); + next = rcu_dereference_protected( + server->uuid_next, lockdep_is_held(&net->fs_lock.lock)); + prev = server->uuid_prev; + if (!prev) { + /* The one at the front is in the tree */ + if (!next) { + rb_erase(&server->uuid_rb, &net->fs_servers); + } else { + rb_replace_node_rcu(&server->uuid_rb, + &next->uuid_rb, + &net->fs_servers); + next->uuid_prev = NULL; + } + } else { + /* This server is not at the front */ + rcu_assign_pointer(prev->uuid_next, next); + if (next) + next->uuid_prev = prev; + } + + list_del(&server->probe_link); + hlist_del_rcu(&server->proc_link); if (!hlist_unhashed(&server->addr4_link)) hlist_del_rcu(&server->addr4_link); if (!hlist_unhashed(&server->addr6_link)) hlist_del_rcu(&server->addr6_link); - write_sequnlock(&net->fs_addr_lock); - afs_destroy_server(net, server); } + write_sequnlock(&net->fs_lock); + + if (active == 0) + afs_destroy_server(net, server); } } @@ -452,15 +546,14 @@ void afs_manage_servers(struct work_struct *work) for (cursor = rb_first(&net->fs_servers); cursor; cursor = rb_next(cursor)) { struct afs_server *server = rb_entry(cursor, struct afs_server, uuid_rb); - int usage = atomic_read(&server->usage); + int active = atomic_read(&server->active); - _debug("manage %pU %u", &server->uuid, usage); + _debug("manage %pU %u", &server->uuid, active); - ASSERTCMP(usage, >=, 1); - ASSERTIFCMP(purging, usage, ==, 1); + ASSERTIFCMP(purging, active, ==, 0); - if (usage == 1) { - time64_t expire_at = server->put_time; + if (active == 0) { + time64_t expire_at = server->unuse_time; if (!test_bit(AFS_SERVER_FL_VL_FAIL, &server->flags) && !test_bit(AFS_SERVER_FL_NOT_FOUND, &server->flags)) @@ -525,26 +618,27 @@ void afs_purge_servers(struct afs_net *net) /* * Get an update for a server's address list. */ -static noinline bool afs_update_server_record(struct afs_fs_cursor *fc, struct afs_server *server) +static noinline bool afs_update_server_record(struct afs_operation *op, + struct afs_server *server) { struct afs_addr_list *alist, *discard; _enter(""); - trace_afs_server(server, atomic_read(&server->usage), afs_server_trace_update); + trace_afs_server(server, atomic_read(&server->ref), atomic_read(&server->active), + afs_server_trace_update); - alist = afs_vl_lookup_addrs(fc->vnode->volume->cell, fc->key, - &server->uuid); + alist = afs_vl_lookup_addrs(op->volume->cell, op->key, &server->uuid); if (IS_ERR(alist)) { if ((PTR_ERR(alist) == -ERESTARTSYS || PTR_ERR(alist) == -EINTR) && - !(fc->flags & AFS_FS_CURSOR_INTR) && + (op->flags & AFS_OPERATION_UNINTR) && server->addresses) { _leave(" = t [intr]"); return true; } - fc->error = PTR_ERR(alist); - _leave(" = f [%d]", fc->error); + op->error = PTR_ERR(alist); + _leave(" = f [%d]", op->error); return false; } @@ -558,7 +652,6 @@ static noinline bool afs_update_server_record(struct afs_fs_cursor *fc, struct a write_unlock(&server->fs_lock); } - server->update_at = ktime_get_real_seconds() + afs_server_update_delay; afs_put_addrlist(discard); _leave(" = t"); return true; @@ -567,10 +660,8 @@ static noinline bool afs_update_server_record(struct afs_fs_cursor *fc, struct a /* * See if a server's address list needs updating. */ -bool afs_check_server_record(struct afs_fs_cursor *fc, struct afs_server *server) +bool afs_check_server_record(struct afs_operation *op, struct afs_server *server) { - time64_t now = ktime_get_real_seconds(); - long diff; bool success; int ret, retries = 0; @@ -579,25 +670,29 @@ bool afs_check_server_record(struct afs_fs_cursor *fc, struct afs_server *server ASSERT(server); retry: - diff = READ_ONCE(server->update_at) - now; - if (diff > 0) { - _leave(" = t [not now %ld]", diff); - return true; - } + if (test_bit(AFS_SERVER_FL_UPDATING, &server->flags)) + goto wait; + if (test_bit(AFS_SERVER_FL_NEEDS_UPDATE, &server->flags)) + goto update; + _leave(" = t [good]"); + return true; +update: if (!test_and_set_bit_lock(AFS_SERVER_FL_UPDATING, &server->flags)) { - success = afs_update_server_record(fc, server); + clear_bit(AFS_SERVER_FL_NEEDS_UPDATE, &server->flags); + success = afs_update_server_record(op, server); clear_bit_unlock(AFS_SERVER_FL_UPDATING, &server->flags); wake_up_bit(&server->flags, AFS_SERVER_FL_UPDATING); _leave(" = %d", success); return success; } +wait: ret = wait_on_bit(&server->flags, AFS_SERVER_FL_UPDATING, - (fc->flags & AFS_FS_CURSOR_INTR) ? - TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE); + (op->flags & AFS_OPERATION_UNINTR) ? + TASK_UNINTERRUPTIBLE : TASK_INTERRUPTIBLE); if (ret == -ERESTARTSYS) { - fc->error = ret; + op->error = ret; _leave(" = f [intr]"); return false; } diff --git a/fs/afs/server_list.c b/fs/afs/server_list.c index 888d91d..ed90567 100644 --- a/fs/afs/server_list.c +++ b/fs/afs/server_list.c @@ -14,11 +14,9 @@ void afs_put_serverlist(struct afs_net *net, struct afs_server_list *slist) int i; if (slist && refcount_dec_and_test(&slist->usage)) { - for (i = 0; i < slist->nr_servers; i++) { - afs_put_cb_interest(net, slist->servers[i].cb_interest); - afs_put_server(net, slist->servers[i].server, - afs_server_trace_put_slist); - } + for (i = 0; i < slist->nr_servers; i++) + afs_unuse_server(net, slist->servers[i].server, + afs_server_trace_put_slist); kfree(slist); } } @@ -46,12 +44,16 @@ struct afs_server_list *afs_alloc_server_list(struct afs_cell *cell, refcount_set(&slist->usage, 1); rwlock_init(&slist->lock); + for (i = 0; i < AFS_MAXTYPES; i++) + slist->vids[i] = vldb->vid[i]; + /* Make sure a records exists for each server in the list. */ for (i = 0; i < vldb->nr_servers; i++) { if (!(vldb->fs_mask[i] & type_mask)) continue; - server = afs_lookup_server(cell, key, &vldb->fs_server[i]); + server = afs_lookup_server(cell, key, &vldb->fs_server[i], + vldb->addr_version[i]); if (IS_ERR(server)) { ret = PTR_ERR(server); if (ret == -ENOENT || @@ -123,31 +125,5 @@ changed: } } - /* Keep the old callback interest records where possible so that we - * maintain callback interception. - */ - i = 0; - j = 0; - while (i < old->nr_servers && j < new->nr_servers) { - if (new->servers[j].server == old->servers[i].server) { - struct afs_cb_interest *cbi = old->servers[i].cb_interest; - if (cbi) { - new->servers[j].cb_interest = cbi; - refcount_inc(&cbi->usage); - } - i++; - j++; - continue; - } - - if (new->servers[j].server < old->servers[i].server) { - j++; - continue; - } - - i++; - continue; - } - return true; } diff --git a/fs/afs/super.c b/fs/afs/super.c index dda7a9a..b552357 100644 --- a/fs/afs/super.c +++ b/fs/afs/super.c @@ -352,7 +352,9 @@ static int afs_validate_fc(struct fs_context *fc) { struct afs_fs_context *ctx = fc->fs_private; struct afs_volume *volume; + struct afs_cell *cell; struct key *key; + int ret; if (!ctx->dyn_root) { if (ctx->no_cell) { @@ -365,6 +367,7 @@ static int afs_validate_fc(struct fs_context *fc) return -EDESTADDRREQ; } + reget_key: /* We try to do the mount securely. */ key = afs_request_key(ctx->cell); if (IS_ERR(key)) @@ -373,10 +376,26 @@ static int afs_validate_fc(struct fs_context *fc) ctx->key = key; if (ctx->volume) { - afs_put_volume(ctx->cell, ctx->volume); + afs_put_volume(ctx->net, ctx->volume, + afs_volume_trace_put_validate_fc); ctx->volume = NULL; } + if (test_bit(AFS_CELL_FL_CHECK_ALIAS, &ctx->cell->flags)) { + ret = afs_cell_detect_alias(ctx->cell, key); + if (ret < 0) + return ret; + if (ret == 1) { + _debug("switch to alias"); + key_put(ctx->key); + ctx->key = NULL; + cell = afs_get_cell(ctx->cell->alias_of); + afs_put_cell(ctx->net, ctx->cell); + ctx->cell = cell; + goto reget_key; + } + } + volume = afs_create_volume(ctx); if (IS_ERR(volume)) return PTR_ERR(volume); @@ -421,7 +440,6 @@ static int afs_set_super(struct super_block *sb, struct fs_context *fc) static int afs_fill_super(struct super_block *sb, struct afs_fs_context *ctx) { struct afs_super_info *as = AFS_FS_S(sb); - struct afs_iget_data iget_data; struct inode *inode = NULL; int ret; @@ -446,13 +464,7 @@ static int afs_fill_super(struct super_block *sb, struct afs_fs_context *ctx) } else { sprintf(sb->s_id, "%llu", as->volume->vid); afs_activate_volume(as->volume); - iget_data.fid.vid = as->volume->vid; - iget_data.fid.vnode = 1; - iget_data.fid.vnode_hi = 0; - iget_data.fid.unique = 1; - iget_data.cb_v_break = as->volume->cb_v_break; - iget_data.cb_s_break = 0; - inode = afs_iget(sb, ctx->key, &iget_data, NULL, NULL, NULL); + inode = afs_root_iget(sb, ctx->key); } if (IS_ERR(inode)) @@ -473,6 +485,7 @@ static int afs_fill_super(struct super_block *sb, struct afs_fs_context *ctx) goto error; } else { sb->s_d_op = &afs_fs_dentry_operations; + rcu_assign_pointer(as->volume->sb, sb); } _leave(" = 0"); @@ -496,7 +509,8 @@ static struct afs_super_info *afs_alloc_sbi(struct fs_context *fc) as->dyn_root = true; } else { as->cell = afs_get_cell(ctx->cell); - as->volume = __afs_get_volume(ctx->volume); + as->volume = afs_get_volume(ctx->volume, + afs_volume_trace_get_alloc_sbi); } } return as; @@ -505,8 +519,9 @@ static struct afs_super_info *afs_alloc_sbi(struct fs_context *fc) static void afs_destroy_sbi(struct afs_super_info *as) { if (as) { - afs_put_volume(as->cell, as->volume); - afs_put_cell(afs_net(as->net_ns), as->cell); + struct afs_net *net = afs_net(as->net_ns); + afs_put_volume(net, as->volume, afs_volume_trace_put_destroy_sbi); + afs_put_cell(net, as->cell); put_net(as->net_ns); kfree(as); } @@ -515,7 +530,6 @@ static void afs_destroy_sbi(struct afs_super_info *as) static void afs_kill_super(struct super_block *sb) { struct afs_super_info *as = AFS_FS_S(sb); - struct afs_net *net = afs_net(as->net_ns); if (as->dyn_root) afs_dynroot_depopulate(sb); @@ -524,7 +538,7 @@ static void afs_kill_super(struct super_block *sb) * deactivating the superblock. */ if (as->volume) - afs_clear_callback_interests(net, as->volume->servers); + rcu_assign_pointer(as->volume->sb, NULL); kill_anon_super(sb); if (as->volume) afs_deactivate_volume(as->volume); @@ -592,7 +606,7 @@ static void afs_free_fc(struct fs_context *fc) struct afs_fs_context *ctx = fc->fs_private; afs_destroy_sbi(fc->s_fs_info); - afs_put_volume(ctx->cell, ctx->volume); + afs_put_volume(ctx->net, ctx->volume, afs_volume_trace_put_free_fc); afs_put_cell(ctx->net, ctx->cell); key_put(ctx->key); kfree(ctx); @@ -674,7 +688,6 @@ static struct inode *afs_alloc_inode(struct super_block *sb) vnode->volume = NULL; vnode->lock_key = NULL; vnode->permit_cache = NULL; - RCU_INIT_POINTER(vnode->cb_interest, NULL); #ifdef CONFIG_AFS_FSCACHE vnode->cache = NULL; #endif @@ -704,22 +717,38 @@ static void afs_destroy_inode(struct inode *inode) _debug("DESTROY INODE %p", inode); - ASSERTCMP(rcu_access_pointer(vnode->cb_interest), ==, NULL); - atomic_dec(&afs_count_active_inodes); } +static void afs_get_volume_status_success(struct afs_operation *op) +{ + struct afs_volume_status *vs = &op->volstatus.vs; + struct kstatfs *buf = op->volstatus.buf; + + if (vs->max_quota == 0) + buf->f_blocks = vs->part_max_blocks; + else + buf->f_blocks = vs->max_quota; + + if (buf->f_blocks > vs->blocks_in_use) + buf->f_bavail = buf->f_bfree = + buf->f_blocks - vs->blocks_in_use; +} + +static const struct afs_operation_ops afs_get_volume_status_operation = { + .issue_afs_rpc = afs_fs_get_volume_status, + .issue_yfs_rpc = yfs_fs_get_volume_status, + .success = afs_get_volume_status_success, +}; + /* * return information about an AFS volume */ static int afs_statfs(struct dentry *dentry, struct kstatfs *buf) { struct afs_super_info *as = AFS_FS_S(dentry->d_sb); - struct afs_fs_cursor fc; - struct afs_volume_status vs; + struct afs_operation *op; struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); - struct key *key; - int ret; buf->f_type = dentry->d_sb->s_magic; buf->f_bsize = AFS_BLOCK_SIZE; @@ -732,31 +761,13 @@ static int afs_statfs(struct dentry *dentry, struct kstatfs *buf) return 0; } - key = afs_request_key(vnode->volume->cell); - if (IS_ERR(key)) - return PTR_ERR(key); + op = afs_alloc_operation(NULL, as->volume); + if (IS_ERR(op)) + return PTR_ERR(op); - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, vnode, key, true)) { - fc.flags |= AFS_FS_CURSOR_NO_VSLEEP; - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(vnode); - afs_fs_get_volume_status(&fc, &vs); - } - - afs_check_for_remote_deletion(&fc, fc.vnode); - ret = afs_end_vnode_operation(&fc); - } - - key_put(key); - - if (ret == 0) { - if (vs.max_quota == 0) - buf->f_blocks = vs.part_max_blocks; - else - buf->f_blocks = vs.max_quota; - buf->f_bavail = buf->f_bfree = buf->f_blocks - vs.blocks_in_use; - } - - return ret; + afs_op_set_vnode(op, 0, vnode); + op->nr_files = 1; + op->volstatus.buf = buf; + op->ops = &afs_get_volume_status_operation; + return afs_do_sync_operation(op); } diff --git a/fs/afs/vl_alias.c b/fs/afs/vl_alias.c new file mode 100644 index 0000000..093895c --- /dev/null +++ b/fs/afs/vl_alias.c @@ -0,0 +1,382 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* AFS cell alias detection + * + * Copyright (C) 2020 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + */ + +#include +#include +#include +#include +#include "internal.h" + +/* + * Sample a volume. + */ +static struct afs_volume *afs_sample_volume(struct afs_cell *cell, struct key *key, + const char *name, unsigned int namelen) +{ + struct afs_volume *volume; + struct afs_fs_context fc = { + .type = 0, /* Explicitly leave it to the VLDB */ + .volnamesz = namelen, + .volname = name, + .net = cell->net, + .cell = cell, + .key = key, /* This might need to be something */ + }; + + volume = afs_create_volume(&fc); + _leave(" = %px", volume); + return volume; +} + +/* + * Compare two addresses. + */ +static int afs_compare_addrs(const struct sockaddr_rxrpc *srx_a, + const struct sockaddr_rxrpc *srx_b) +{ + short port_a, port_b; + int addr_a, addr_b, diff; + + diff = (short)srx_a->transport_type - (short)srx_b->transport_type; + if (diff) + goto out; + + switch (srx_a->transport_type) { + case AF_INET: { + const struct sockaddr_in *a = &srx_a->transport.sin; + const struct sockaddr_in *b = &srx_b->transport.sin; + addr_a = ntohl(a->sin_addr.s_addr); + addr_b = ntohl(b->sin_addr.s_addr); + diff = addr_a - addr_b; + if (diff == 0) { + port_a = ntohs(a->sin_port); + port_b = ntohs(b->sin_port); + diff = port_a - port_b; + } + break; + } + + case AF_INET6: { + const struct sockaddr_in6 *a = &srx_a->transport.sin6; + const struct sockaddr_in6 *b = &srx_b->transport.sin6; + diff = memcmp(&a->sin6_addr, &b->sin6_addr, 16); + if (diff == 0) { + port_a = ntohs(a->sin6_port); + port_b = ntohs(b->sin6_port); + diff = port_a - port_b; + } + break; + } + + default: + BUG(); + } + +out: + return diff; +} + +/* + * Compare the address lists of a pair of fileservers. + */ +static int afs_compare_fs_alists(const struct afs_server *server_a, + const struct afs_server *server_b) +{ + const struct afs_addr_list *la, *lb; + int a = 0, b = 0, addr_matches = 0; + + la = rcu_dereference(server_a->addresses); + lb = rcu_dereference(server_b->addresses); + + while (a < la->nr_addrs && b < lb->nr_addrs) { + const struct sockaddr_rxrpc *srx_a = &la->addrs[a]; + const struct sockaddr_rxrpc *srx_b = &lb->addrs[b]; + int diff = afs_compare_addrs(srx_a, srx_b); + + if (diff < 0) { + a++; + } else if (diff > 0) { + b++; + } else { + addr_matches++; + a++; + b++; + } + } + + return addr_matches; +} + +/* + * Compare the fileserver lists of two volumes. The server lists are sorted in + * order of ascending UUID. + */ +static int afs_compare_volume_slists(const struct afs_volume *vol_a, + const struct afs_volume *vol_b) +{ + const struct afs_server_list *la, *lb; + int i, a = 0, b = 0, uuid_matches = 0, addr_matches = 0; + + la = rcu_dereference(vol_a->servers); + lb = rcu_dereference(vol_b->servers); + + for (i = 0; i < AFS_MAXTYPES; i++) + if (la->vids[i] != lb->vids[i]) + return 0; + + while (a < la->nr_servers && b < lb->nr_servers) { + const struct afs_server *server_a = la->servers[a].server; + const struct afs_server *server_b = lb->servers[b].server; + int diff = memcmp(&server_a->uuid, &server_b->uuid, sizeof(uuid_t)); + + if (diff < 0) { + a++; + } else if (diff > 0) { + b++; + } else { + uuid_matches++; + addr_matches += afs_compare_fs_alists(server_a, server_b); + a++; + b++; + } + } + + _leave(" = %d [um %d]", addr_matches, uuid_matches); + return addr_matches; +} + +/* + * Compare root.cell volumes. + */ +static int afs_compare_cell_roots(struct afs_cell *cell) +{ + struct afs_cell *p; + + _enter(""); + + rcu_read_lock(); + + hlist_for_each_entry_rcu(p, &cell->net->proc_cells, proc_link) { + if (p == cell || p->alias_of) + continue; + if (!p->root_volume) + continue; /* Ignore cells that don't have a root.cell volume. */ + + if (afs_compare_volume_slists(cell->root_volume, p->root_volume) != 0) + goto is_alias; + } + + rcu_read_unlock(); + _leave(" = 0"); + return 0; + +is_alias: + rcu_read_unlock(); + cell->alias_of = afs_get_cell(p); + return 1; +} + +/* + * Query the new cell for a volume from a cell we're already using. + */ +static int afs_query_for_alias_one(struct afs_cell *cell, struct key *key, + struct afs_cell *p) +{ + struct afs_volume *volume, *pvol = NULL; + int ret; + + /* Arbitrarily pick a volume from the list. */ + read_seqlock_excl(&p->volume_lock); + if (!RB_EMPTY_ROOT(&p->volumes)) + pvol = afs_get_volume(rb_entry(p->volumes.rb_node, + struct afs_volume, cell_node), + afs_volume_trace_get_query_alias); + read_sequnlock_excl(&p->volume_lock); + if (!pvol) + return 0; + + _enter("%s:%s", cell->name, pvol->name); + + /* And see if it's in the new cell. */ + volume = afs_sample_volume(cell, key, pvol->name, pvol->name_len); + if (IS_ERR(volume)) { + afs_put_volume(cell->net, pvol, afs_volume_trace_put_query_alias); + if (PTR_ERR(volume) != -ENOMEDIUM) + return PTR_ERR(volume); + /* That volume is not in the new cell, so not an alias */ + return 0; + } + + /* The new cell has a like-named volume also - compare volume ID, + * server and address lists. + */ + ret = 0; + if (pvol->vid == volume->vid) { + rcu_read_lock(); + if (afs_compare_volume_slists(volume, pvol)) + ret = 1; + rcu_read_unlock(); + } + + afs_put_volume(cell->net, volume, afs_volume_trace_put_query_alias); + afs_put_volume(cell->net, pvol, afs_volume_trace_put_query_alias); + return ret; +} + +/* + * Query the new cell for volumes we know exist in cells we're already using. + */ +static int afs_query_for_alias(struct afs_cell *cell, struct key *key) +{ + struct afs_cell *p; + + _enter("%s", cell->name); + + if (mutex_lock_interruptible(&cell->net->proc_cells_lock) < 0) + return -ERESTARTSYS; + + hlist_for_each_entry(p, &cell->net->proc_cells, proc_link) { + if (p == cell || p->alias_of) + continue; + if (RB_EMPTY_ROOT(&p->volumes)) + continue; + if (p->root_volume) + continue; /* Ignore cells that have a root.cell volume. */ + afs_get_cell(p); + mutex_unlock(&cell->net->proc_cells_lock); + + if (afs_query_for_alias_one(cell, key, p) != 0) + goto is_alias; + + if (mutex_lock_interruptible(&cell->net->proc_cells_lock) < 0) { + afs_put_cell(cell->net, p); + return -ERESTARTSYS; + } + + afs_put_cell(cell->net, p); + } + + mutex_unlock(&cell->net->proc_cells_lock); + _leave(" = 0"); + return 0; + +is_alias: + cell->alias_of = p; /* Transfer our ref */ + return 1; +} + +/* + * Look up a VLDB record for a volume. + */ +static char *afs_vl_get_cell_name(struct afs_cell *cell, struct key *key) +{ + struct afs_vl_cursor vc; + char *cell_name = ERR_PTR(-EDESTADDRREQ); + bool skipped = false, not_skipped = false; + int ret; + + if (!afs_begin_vlserver_operation(&vc, cell, key)) + return ERR_PTR(-ERESTARTSYS); + + while (afs_select_vlserver(&vc)) { + if (!test_bit(AFS_VLSERVER_FL_IS_YFS, &vc.server->flags)) { + vc.ac.error = -EOPNOTSUPP; + skipped = true; + continue; + } + not_skipped = true; + cell_name = afs_yfsvl_get_cell_name(&vc); + } + + ret = afs_end_vlserver_operation(&vc); + if (skipped && !not_skipped) + ret = -EOPNOTSUPP; + return ret < 0 ? ERR_PTR(ret) : cell_name; +} + +static int yfs_check_canonical_cell_name(struct afs_cell *cell, struct key *key) +{ + struct afs_cell *master; + char *cell_name; + + cell_name = afs_vl_get_cell_name(cell, key); + if (IS_ERR(cell_name)) + return PTR_ERR(cell_name); + + if (strcmp(cell_name, cell->name) == 0) { + kfree(cell_name); + return 0; + } + + master = afs_lookup_cell(cell->net, cell_name, strlen(cell_name), + NULL, false); + kfree(cell_name); + if (IS_ERR(master)) + return PTR_ERR(master); + + cell->alias_of = master; /* Transfer our ref */ + return 1; +} + +static int afs_do_cell_detect_alias(struct afs_cell *cell, struct key *key) +{ + struct afs_volume *root_volume; + int ret; + + _enter("%s", cell->name); + + ret = yfs_check_canonical_cell_name(cell, key); + if (ret != -EOPNOTSUPP) + return ret; + + /* Try and get the root.cell volume for comparison with other cells */ + root_volume = afs_sample_volume(cell, key, "root.cell", 9); + if (!IS_ERR(root_volume)) { + cell->root_volume = root_volume; + return afs_compare_cell_roots(cell); + } + + if (PTR_ERR(root_volume) != -ENOMEDIUM) + return PTR_ERR(root_volume); + + /* Okay, this cell doesn't have an root.cell volume. We need to + * locate some other random volume and use that to check. + */ + return afs_query_for_alias(cell, key); +} + +/* + * Check to see if a new cell is an alias of a cell we already have. At this + * point we have the cell's volume server list. + * + * Returns 0 if we didn't detect an alias, 1 if we found an alias and an error + * if we had problems gathering the data required. In the case the we did + * detect an alias, cell->alias_of is set to point to the assumed master. + */ +int afs_cell_detect_alias(struct afs_cell *cell, struct key *key) +{ + struct afs_net *net = cell->net; + int ret; + + if (mutex_lock_interruptible(&net->cells_alias_lock) < 0) + return -ERESTARTSYS; + + if (test_bit(AFS_CELL_FL_CHECK_ALIAS, &cell->flags)) { + ret = afs_do_cell_detect_alias(cell, key); + if (ret >= 0) + clear_bit_unlock(AFS_CELL_FL_CHECK_ALIAS, &cell->flags); + } else { + ret = cell->alias_of ? 1 : 0; + } + + mutex_unlock(&net->cells_alias_lock); + + if (ret == 1) + pr_notice("kAFS: Cell %s is an alias of %s\n", + cell->name, cell->alias_of->name); + return ret; +} diff --git a/fs/afs/vl_rotate.c b/fs/afs/vl_rotate.c index 72eacc1..f405ca8 100644 --- a/fs/afs/vl_rotate.c +++ b/fs/afs/vl_rotate.c @@ -151,6 +151,10 @@ bool afs_select_vlserver(struct afs_vl_cursor *vc) vc->error = error; vc->flags |= AFS_VL_CURSOR_RETRY; goto next_server; + + case -EOPNOTSUPP: + _debug("notsupp"); + goto next_server; } restart_from_beginning: diff --git a/fs/afs/vlclient.c b/fs/afs/vlclient.c index 516e9a3..fd82850 100644 --- a/fs/afs/vlclient.c +++ b/fs/afs/vlclient.c @@ -82,6 +82,7 @@ static int afs_deliver_vl_get_entry_by_name_u(struct afs_call *call) for (j = 0; j < 6; j++) uuid->node[j] = (u8)ntohl(xdr->node[j]); + entry->addr_version[n] = ntohl(uvldb->serverUnique[i]); entry->nr_servers++; } @@ -447,8 +448,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call) call->count2 = ntohl(*bp); /* Type or next count */ if (call->count > YFS_MAXENDPOINTS) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_yvl_fsendpt_num); + return afs_protocol_error(call, afs_eproto_yvl_fsendpt_num); alist = afs_alloc_addrlist(call->count, FS_SERVICE, AFS_FS_PORT); if (!alist) @@ -468,8 +468,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call) size = sizeof(__be32) * (1 + 4 + 1); break; default: - return afs_protocol_error(call, -EBADMSG, - afs_eproto_yvl_fsendpt_type); + return afs_protocol_error(call, afs_eproto_yvl_fsendpt_type); } size += sizeof(__be32); @@ -487,21 +486,20 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call) switch (call->count2) { case YFS_ENDPOINT_IPV4: if (ntohl(bp[0]) != sizeof(__be32) * 2) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_yvl_fsendpt4_len); + return afs_protocol_error( + call, afs_eproto_yvl_fsendpt4_len); afs_merge_fs_addr4(alist, bp[1], ntohl(bp[2])); bp += 3; break; case YFS_ENDPOINT_IPV6: if (ntohl(bp[0]) != sizeof(__be32) * 5) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_yvl_fsendpt6_len); + return afs_protocol_error( + call, afs_eproto_yvl_fsendpt6_len); afs_merge_fs_addr6(alist, bp + 1, ntohl(bp[5])); bp += 6; break; default: - return afs_protocol_error(call, -EBADMSG, - afs_eproto_yvl_fsendpt_type); + return afs_protocol_error(call, afs_eproto_yvl_fsendpt_type); } /* Got either the type of the next entry or the count of @@ -519,8 +517,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call) if (!call->count) goto end; if (call->count > YFS_MAXENDPOINTS) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_yvl_vlendpt_type); + return afs_protocol_error(call, afs_eproto_yvl_vlendpt_type); afs_extract_to_buf(call, 1 * sizeof(__be32)); call->unmarshall = 3; @@ -547,8 +544,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call) size = sizeof(__be32) * (1 + 4 + 1); break; default: - return afs_protocol_error(call, -EBADMSG, - afs_eproto_yvl_vlendpt_type); + return afs_protocol_error(call, afs_eproto_yvl_vlendpt_type); } if (call->count > 1) @@ -566,19 +562,18 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call) switch (call->count2) { case YFS_ENDPOINT_IPV4: if (ntohl(bp[0]) != sizeof(__be32) * 2) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_yvl_vlendpt4_len); + return afs_protocol_error( + call, afs_eproto_yvl_vlendpt4_len); bp += 3; break; case YFS_ENDPOINT_IPV6: if (ntohl(bp[0]) != sizeof(__be32) * 5) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_yvl_vlendpt6_len); + return afs_protocol_error( + call, afs_eproto_yvl_vlendpt6_len); bp += 6; break; default: - return afs_protocol_error(call, -EBADMSG, - afs_eproto_yvl_vlendpt_type); + return afs_protocol_error(call, afs_eproto_yvl_vlendpt_type); } /* Got either the type of the next entry or the count of @@ -650,3 +645,114 @@ struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *vc, afs_make_call(&vc->ac, call, GFP_KERNEL); return (struct afs_addr_list *)afs_wait_for_call_to_complete(call, &vc->ac); } + +/* + * Deliver reply data to a YFSVL.GetCellName operation. + */ +static int afs_deliver_yfsvl_get_cell_name(struct afs_call *call) +{ + char *cell_name; + u32 namesz, paddedsz; + int ret; + + _enter("{%u,%zu/%u}", + call->unmarshall, iov_iter_count(call->iter), call->count); + + switch (call->unmarshall) { + case 0: + afs_extract_to_tmp(call); + call->unmarshall++; + + /* Fall through - and extract the cell name length */ + case 1: + ret = afs_extract_data(call, true); + if (ret < 0) + return ret; + + namesz = ntohl(call->tmp); + if (namesz > AFS_MAXCELLNAME) + return afs_protocol_error(call, afs_eproto_cellname_len); + paddedsz = (namesz + 3) & ~3; + call->count = namesz; + call->count2 = paddedsz - namesz; + + cell_name = kmalloc(namesz + 1, GFP_KERNEL); + if (!cell_name) + return -ENOMEM; + cell_name[namesz] = 0; + call->ret_str = cell_name; + + afs_extract_begin(call, cell_name, namesz); + call->unmarshall++; + + /* Fall through - and extract cell name */ + case 2: + ret = afs_extract_data(call, true); + if (ret < 0) + return ret; + + afs_extract_discard(call, call->count2); + call->unmarshall++; + + /* Fall through - and extract padding */ + case 3: + ret = afs_extract_data(call, false); + if (ret < 0) + return ret; + + call->unmarshall++; + break; + } + + _leave(" = 0 [done]"); + return 0; +} + +static void afs_destroy_yfsvl_get_cell_name(struct afs_call *call) +{ + kfree(call->ret_str); + afs_flat_call_destructor(call); +} + +/* + * VL.GetCapabilities operation type + */ +static const struct afs_call_type afs_YFSVLGetCellName = { + .name = "YFSVL.GetCellName", + .op = afs_YFSVL_GetCellName, + .deliver = afs_deliver_yfsvl_get_cell_name, + .destructor = afs_destroy_yfsvl_get_cell_name, +}; + +/* + * Probe a volume server for the capabilities that it supports. This can + * return up to 196 words. + * + * We use this to probe for service upgrade to determine what the server at the + * other end supports. + */ +char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *vc) +{ + struct afs_call *call; + struct afs_net *net = vc->cell->net; + __be32 *bp; + + _enter(""); + + call = afs_alloc_flat_call(net, &afs_YFSVLGetCellName, 1 * 4, 0); + if (!call) + return ERR_PTR(-ENOMEM); + + call->key = vc->key; + call->ret_str = NULL; + call->max_lifespan = AFS_VL_MAX_LIFESPAN; + + /* marshall the parameters */ + bp = call->request; + *bp++ = htonl(YVLGETCELLNAME); + + /* Can't take a ref on server */ + trace_afs_make_vl_call(call); + afs_make_call(&vc->ac, call, GFP_KERNEL); + return (char *)afs_wait_for_call_to_complete(call, &vc->ac); +} diff --git a/fs/afs/volume.c b/fs/afs/volume.c index 4310336..9bc0509 100644 --- a/fs/afs/volume.c +++ b/fs/afs/volume.c @@ -13,6 +13,56 @@ unsigned __read_mostly afs_volume_gc_delay = 10; unsigned __read_mostly afs_volume_record_life = 60 * 60; /* + * Insert a volume into a cell. If there's an existing volume record, that is + * returned instead with a ref held. + */ +static struct afs_volume *afs_insert_volume_into_cell(struct afs_cell *cell, + struct afs_volume *volume) +{ + struct afs_volume *p; + struct rb_node *parent = NULL, **pp; + + write_seqlock(&cell->volume_lock); + + pp = &cell->volumes.rb_node; + while (*pp) { + parent = *pp; + p = rb_entry(parent, struct afs_volume, cell_node); + if (p->vid < volume->vid) { + pp = &(*pp)->rb_left; + } else if (p->vid > volume->vid) { + pp = &(*pp)->rb_right; + } else { + volume = afs_get_volume(p, afs_volume_trace_get_cell_insert); + goto found; + } + } + + rb_link_node_rcu(&volume->cell_node, parent, pp); + rb_insert_color(&volume->cell_node, &cell->volumes); + hlist_add_head_rcu(&volume->proc_link, &cell->proc_volumes); + +found: + write_sequnlock(&cell->volume_lock); + return volume; + +} + +static void afs_remove_volume_from_cell(struct afs_volume *volume) +{ + struct afs_cell *cell = volume->cell; + + if (!hlist_unhashed(&volume->proc_link)) { + trace_afs_volume(volume->vid, atomic_read(&volume->usage), + afs_volume_trace_remove); + write_seqlock(&cell->volume_lock); + hlist_del_rcu(&volume->proc_link); + rb_erase(&volume->cell_node, &cell->volumes); + write_sequnlock(&cell->volume_lock); + } +} + +/* * Allocate a volume record and load it up from a vldb record. */ static struct afs_volume *afs_alloc_volume(struct afs_fs_context *params, @@ -39,7 +89,7 @@ static struct afs_volume *afs_alloc_volume(struct afs_fs_context *params, volume->name_len = vldb->name_len; atomic_set(&volume->usage, 1); - INIT_LIST_HEAD(&volume->proc_link); + INIT_HLIST_NODE(&volume->proc_link); rwlock_init(&volume->servers_lock); rwlock_init(&volume->cb_v_break_lock); memcpy(volume->name, vldb->name, vldb->name_len + 1); @@ -51,7 +101,8 @@ static struct afs_volume *afs_alloc_volume(struct afs_fs_context *params, } refcount_set(&slist->usage, 1); - volume->servers = slist; + rcu_assign_pointer(volume->servers, slist); + trace_afs_volume(volume->vid, 1, afs_volume_trace_alloc); return volume; error_1: @@ -62,6 +113,25 @@ error_0: } /* + * Look up or allocate a volume record. + */ +static struct afs_volume *afs_lookup_volume(struct afs_fs_context *params, + struct afs_vldb_entry *vldb, + unsigned long type_mask) +{ + struct afs_volume *candidate, *volume; + + candidate = afs_alloc_volume(params, vldb, type_mask); + if (IS_ERR(candidate)) + return candidate; + + volume = afs_insert_volume_into_cell(params->cell, candidate); + if (volume != candidate) + afs_put_volume(params->net, candidate, afs_volume_trace_put_cell_dup); + return volume; +} + +/* * Look up a VLDB record for a volume. */ static struct afs_vldb_entry *afs_vl_lookup_vldb(struct afs_cell *cell, @@ -138,7 +208,7 @@ struct afs_volume *afs_create_volume(struct afs_fs_context *params) } type_mask = 1UL << params->type; - volume = afs_alloc_volume(params, vldb, type_mask); + volume = afs_lookup_volume(params, vldb, type_mask); error: kfree(vldb); @@ -156,23 +226,42 @@ static void afs_destroy_volume(struct afs_net *net, struct afs_volume *volume) ASSERTCMP(volume->cache, ==, NULL); #endif - afs_put_serverlist(net, volume->servers); + afs_remove_volume_from_cell(volume); + afs_put_serverlist(net, rcu_access_pointer(volume->servers)); afs_put_cell(net, volume->cell); - kfree(volume); + trace_afs_volume(volume->vid, atomic_read(&volume->usage), + afs_volume_trace_free); + kfree_rcu(volume, rcu); _leave(" [destroyed]"); } /* - * Drop a reference on a volume record. + * Get a reference on a volume record. */ -void afs_put_volume(struct afs_cell *cell, struct afs_volume *volume) +struct afs_volume *afs_get_volume(struct afs_volume *volume, + enum afs_volume_trace reason) { if (volume) { - _enter("%s", volume->name); + int u = atomic_inc_return(&volume->usage); + trace_afs_volume(volume->vid, u, reason); + } + return volume; +} + - if (atomic_dec_and_test(&volume->usage)) - afs_destroy_volume(cell->net, volume); +/* + * Drop a reference on a volume record. + */ +void afs_put_volume(struct afs_net *net, struct afs_volume *volume, + enum afs_volume_trace reason) +{ + if (volume) { + afs_volid_t vid = volume->vid; + int u = atomic_dec_return(&volume->usage); + trace_afs_volume(vid, u, reason); + if (u == 0) + afs_destroy_volume(net, volume); } } @@ -188,10 +277,6 @@ void afs_activate_volume(struct afs_volume *volume) NULL, 0, volume, 0, true); #endif - - write_lock(&volume->cell->proc_lock); - list_add_tail(&volume->proc_link, &volume->cell->proc_volumes); - write_unlock(&volume->cell->proc_lock); } /* @@ -201,10 +286,6 @@ void afs_deactivate_volume(struct afs_volume *volume) { _enter("%s", volume->name); - write_lock(&volume->cell->proc_lock); - list_del_init(&volume->proc_link); - write_unlock(&volume->cell->proc_lock); - #ifdef CONFIG_AFS_FSCACHE fscache_relinquish_cookie(volume->cache, NULL, test_bit(AFS_VOLUME_DELETED, &volume->flags)); @@ -256,17 +337,17 @@ static int afs_update_volume_status(struct afs_volume *volume, struct key *key) write_lock(&volume->servers_lock); discard = new; - old = volume->servers; + old = rcu_dereference_protected(volume->servers, + lockdep_is_held(&volume->servers_lock)); if (afs_annotate_server_list(new, old)) { new->seq = volume->servers_seq + 1; - volume->servers = new; + rcu_assign_pointer(volume->servers, new); smp_wmb(); volume->servers_seq++; discard = old; } volume->update_at = ktime_get_real_seconds() + afs_volume_record_life; - clear_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags); write_unlock(&volume->servers_lock); ret = 0; @@ -281,25 +362,27 @@ error: /* * Make sure the volume record is up to date. */ -int afs_check_volume_status(struct afs_volume *volume, struct afs_fs_cursor *fc) +int afs_check_volume_status(struct afs_volume *volume, struct afs_operation *op) { - time64_t now = ktime_get_real_seconds(); int ret, retries = 0; _enter(""); - if (volume->update_at <= now) - set_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags); - retry: - if (!test_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags) && - !test_bit(AFS_VOLUME_WAIT, &volume->flags)) { - _leave(" = 0"); - return 0; - } - + if (test_bit(AFS_VOLUME_WAIT, &volume->flags)) + goto wait; + if (volume->update_at <= ktime_get_real_seconds() || + test_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags)) + goto update; + _leave(" = 0"); + return 0; + +update: if (!test_and_set_bit_lock(AFS_VOLUME_UPDATING, &volume->flags)) { - ret = afs_update_volume_status(volume, fc->key); + clear_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags); + ret = afs_update_volume_status(volume, op->key); + if (ret < 0) + set_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags); clear_bit_unlock(AFS_VOLUME_WAIT, &volume->flags); clear_bit_unlock(AFS_VOLUME_UPDATING, &volume->flags); wake_up_bit(&volume->flags, AFS_VOLUME_WAIT); @@ -307,14 +390,15 @@ retry: return ret; } +wait: if (!test_bit(AFS_VOLUME_WAIT, &volume->flags)) { _leave(" = 0 [no wait]"); return 0; } ret = wait_on_bit(&volume->flags, AFS_VOLUME_WAIT, - (fc->flags & AFS_FS_CURSOR_INTR) ? - TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE); + (op->flags & AFS_OPERATION_UNINTR) ? + TASK_UNINTERRUPTIBLE : TASK_INTERRUPTIBLE); if (ret == -ERESTARTSYS) { _leave(" = %d", ret); return ret; diff --git a/fs/afs/write.c b/fs/afs/write.c index cb76566..97bccde 100644 --- a/fs/afs/write.c +++ b/fs/afs/write.c @@ -349,82 +349,111 @@ static void afs_pages_written_back(struct afs_vnode *vnode, } /* - * write to a file + * Find a key to use for the writeback. We cached the keys used to author the + * writes on the vnode. *_wbk will contain the last writeback key used or NULL + * and we need to start from there if it's set. */ -static int afs_store_data(struct address_space *mapping, - pgoff_t first, pgoff_t last, - unsigned offset, unsigned to) +static int afs_get_writeback_key(struct afs_vnode *vnode, + struct afs_wb_key **_wbk) { - struct afs_vnode *vnode = AFS_FS_I(mapping->host); - struct afs_fs_cursor fc; - struct afs_status_cb *scb; struct afs_wb_key *wbk = NULL; struct list_head *p; int ret = -ENOKEY, ret2; - _enter("%s{%llx:%llu.%u},%lx,%lx,%x,%x", - vnode->volume->name, - vnode->fid.vid, - vnode->fid.vnode, - vnode->fid.unique, - first, last, offset, to); - - scb = kzalloc(sizeof(struct afs_status_cb), GFP_NOFS); - if (!scb) - return -ENOMEM; - spin_lock(&vnode->wb_lock); - p = vnode->wb_keys.next; + if (*_wbk) + p = (*_wbk)->vnode_link.next; + else + p = vnode->wb_keys.next; - /* Iterate through the list looking for a valid key to use. */ -try_next_key: while (p != &vnode->wb_keys) { wbk = list_entry(p, struct afs_wb_key, vnode_link); _debug("wbk %u", key_serial(wbk->key)); ret2 = key_validate(wbk->key); - if (ret2 == 0) - goto found_key; + if (ret2 == 0) { + refcount_inc(&wbk->usage); + _debug("USE WB KEY %u", key_serial(wbk->key)); + break; + } + + wbk = NULL; if (ret == -ENOKEY) ret = ret2; p = p->next; } spin_unlock(&vnode->wb_lock); - afs_put_wb_key(wbk); - kfree(scb); - _leave(" = %d [no keys]", ret); - return ret; + if (*_wbk) + afs_put_wb_key(*_wbk); + *_wbk = wbk; + return 0; +} -found_key: - refcount_inc(&wbk->usage); - spin_unlock(&vnode->wb_lock); +static void afs_store_data_success(struct afs_operation *op) +{ + struct afs_vnode *vnode = op->file[0].vnode; - _debug("USE WB KEY %u", key_serial(wbk->key)); + afs_vnode_commit_status(op, &op->file[0]); + if (op->error == 0) { + afs_pages_written_back(vnode, op->store.first, op->store.last); + afs_stat_v(vnode, n_stores); + atomic_long_add((op->store.last * PAGE_SIZE + op->store.last_to) - + (op->store.first * PAGE_SIZE + op->store.first_offset), + &afs_v2net(vnode)->n_store_bytes); + } +} - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, vnode, wbk->key, false)) { - afs_dataversion_t data_version = vnode->status.data_version + 1; +static const struct afs_operation_ops afs_store_data_operation = { + .issue_afs_rpc = afs_fs_store_data, + .issue_yfs_rpc = yfs_fs_store_data, + .success = afs_store_data_success, +}; - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(vnode); - afs_fs_store_data(&fc, mapping, first, last, offset, to, scb); - } +/* + * write to a file + */ +static int afs_store_data(struct address_space *mapping, + pgoff_t first, pgoff_t last, + unsigned offset, unsigned to) +{ + struct afs_vnode *vnode = AFS_FS_I(mapping->host); + struct afs_operation *op; + struct afs_wb_key *wbk = NULL; + int ret; - afs_check_for_remote_deletion(&fc, vnode); - afs_vnode_commit_status(&fc, vnode, fc.cb_break, - &data_version, scb); - if (fc.ac.error == 0) - afs_pages_written_back(vnode, first, last); - ret = afs_end_vnode_operation(&fc); + _enter("%s{%llx:%llu.%u},%lx,%lx,%x,%x", + vnode->volume->name, + vnode->fid.vid, + vnode->fid.vnode, + vnode->fid.unique, + first, last, offset, to); + + ret = afs_get_writeback_key(vnode, &wbk); + if (ret) { + _leave(" = %d [no keys]", ret); + return ret; } - switch (ret) { - case 0: - afs_stat_v(vnode, n_stores); - atomic_long_add((last * PAGE_SIZE + to) - - (first * PAGE_SIZE + offset), - &afs_v2net(vnode)->n_store_bytes); - break; + op = afs_alloc_operation(wbk->key, vnode->volume); + if (IS_ERR(op)) { + afs_put_wb_key(wbk); + return -ENOMEM; + } + + afs_op_set_vnode(op, 0, vnode); + op->file[0].dv_delta = 1; + op->store.mapping = mapping; + op->store.first = first; + op->store.last = last; + op->store.first_offset = offset; + op->store.last_to = to; + op->ops = &afs_store_data_operation; + +try_next_key: + afs_begin_vnode_operation(op); + afs_wait_for_operation(op); + + switch (op->error) { case -EACCES: case -EPERM: case -ENOKEY: @@ -432,16 +461,19 @@ found_key: case -EKEYREJECTED: case -EKEYREVOKED: _debug("next"); - spin_lock(&vnode->wb_lock); - p = wbk->vnode_link.next; - afs_put_wb_key(wbk); - goto try_next_key; + + ret = afs_get_writeback_key(vnode, &wbk); + if (ret == 0) { + key_put(op->key); + op->key = key_get(wbk->key); + goto try_next_key; + } + break; } afs_put_wb_key(wbk); - kfree(scb); - _leave(" = %d", ret); - return ret; + _leave(" = %d", op->error); + return afs_put_operation(op); } /* diff --git a/fs/afs/xattr.c b/fs/afs/xattr.c index 7af41fd..84f3c4f 100644 --- a/fs/afs/xattr.c +++ b/fs/afs/xattr.c @@ -35,6 +35,25 @@ ssize_t afs_listxattr(struct dentry *dentry, char *buffer, size_t size) } /* + * Deal with the result of a successful fetch ACL operation. + */ +static void afs_acl_success(struct afs_operation *op) +{ + afs_vnode_commit_status(op, &op->file[0]); +} + +static void afs_acl_put(struct afs_operation *op) +{ + kfree(op->acl); +} + +static const struct afs_operation_ops afs_fetch_acl_operation = { + .issue_afs_rpc = afs_fs_fetch_acl, + .success = afs_acl_success, + .put = afs_acl_put, +}; + +/* * Get a file's ACL. */ static int afs_xattr_get_acl(const struct xattr_handler *handler, @@ -42,37 +61,23 @@ static int afs_xattr_get_acl(const struct xattr_handler *handler, struct inode *inode, const char *name, void *buffer, size_t size) { - struct afs_fs_cursor fc; - struct afs_status_cb *scb; + struct afs_operation *op; struct afs_vnode *vnode = AFS_FS_I(inode); struct afs_acl *acl = NULL; - struct key *key; - int ret = -ENOMEM; + int ret; - scb = kzalloc(sizeof(struct afs_status_cb), GFP_NOFS); - if (!scb) - goto error; - - key = afs_request_key(vnode->volume->cell); - if (IS_ERR(key)) { - ret = PTR_ERR(key); - goto error_scb; - } + op = afs_alloc_operation(NULL, vnode->volume); + if (IS_ERR(op)) + return -ENOMEM; - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, vnode, key, true)) { - afs_dataversion_t data_version = vnode->status.data_version; - - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(vnode); - acl = afs_fs_fetch_acl(&fc, scb); - } + afs_op_set_vnode(op, 0, vnode); + op->ops = &afs_fetch_acl_operation; - afs_check_for_remote_deletion(&fc, fc.vnode); - afs_vnode_commit_status(&fc, vnode, fc.cb_break, - &data_version, scb); - ret = afs_end_vnode_operation(&fc); - } + afs_begin_vnode_operation(op); + afs_wait_for_operation(op); + acl = op->acl; + op->acl = NULL; + ret = afs_put_operation(op); if (ret == 0) { ret = acl->size; @@ -80,18 +85,37 @@ static int afs_xattr_get_acl(const struct xattr_handler *handler, if (acl->size <= size) memcpy(buffer, acl->data, acl->size); else - ret = -ERANGE; + op->error = -ERANGE; } - kfree(acl); } - key_put(key); -error_scb: - kfree(scb); -error: + kfree(acl); return ret; } +static bool afs_make_acl(struct afs_operation *op, + const void *buffer, size_t size) +{ + struct afs_acl *acl; + + acl = kmalloc(sizeof(*acl) + size, GFP_KERNEL); + if (!acl) { + afs_op_nomem(op); + return false; + } + + acl->size = size; + memcpy(acl->data, buffer, size); + op->acl = acl; + return true; +} + +static const struct afs_operation_ops afs_store_acl_operation = { + .issue_afs_rpc = afs_fs_store_acl, + .success = afs_acl_success, + .put = afs_acl_put, +}; + /* * Set a file's AFS3 ACL. */ @@ -100,55 +124,22 @@ static int afs_xattr_set_acl(const struct xattr_handler *handler, struct inode *inode, const char *name, const void *buffer, size_t size, int flags) { - struct afs_fs_cursor fc; - struct afs_status_cb *scb; + struct afs_operation *op; struct afs_vnode *vnode = AFS_FS_I(inode); - struct afs_acl *acl = NULL; - struct key *key; - int ret = -ENOMEM; if (flags == XATTR_CREATE) return -EINVAL; - scb = kzalloc(sizeof(struct afs_status_cb), GFP_NOFS); - if (!scb) - goto error; - - acl = kmalloc(sizeof(*acl) + size, GFP_KERNEL); - if (!acl) - goto error_scb; - - key = afs_request_key(vnode->volume->cell); - if (IS_ERR(key)) { - ret = PTR_ERR(key); - goto error_acl; - } - - acl->size = size; - memcpy(acl->data, buffer, size); - - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, vnode, key, true)) { - afs_dataversion_t data_version = vnode->status.data_version; + op = afs_alloc_operation(NULL, vnode->volume); + if (IS_ERR(op)) + return -ENOMEM; - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(vnode); - afs_fs_store_acl(&fc, acl, scb); - } + afs_op_set_vnode(op, 0, vnode); + if (!afs_make_acl(op, buffer, size)) + return afs_put_operation(op); - afs_check_for_remote_deletion(&fc, fc.vnode); - afs_vnode_commit_status(&fc, vnode, fc.cb_break, - &data_version, scb); - ret = afs_end_vnode_operation(&fc); - } - - key_put(key); -error_acl: - kfree(acl); -error_scb: - kfree(scb); -error: - return ret; + op->ops = &afs_store_acl_operation; + return afs_do_sync_operation(op); } static const struct xattr_handler afs_xattr_afs_acl_handler = { @@ -157,6 +148,17 @@ static const struct xattr_handler afs_xattr_afs_acl_handler = { .set = afs_xattr_set_acl, }; +static void yfs_acl_put(struct afs_operation *op) +{ + yfs_free_opaque_acl(op->yacl); +} + +static const struct afs_operation_ops yfs_fetch_opaque_acl_operation = { + .issue_yfs_rpc = yfs_fs_fetch_opaque_acl, + .success = afs_acl_success, + /* Don't free op->yacl in .put here */ +}; + /* * Get a file's YFS ACL. */ @@ -165,11 +167,9 @@ static int afs_xattr_get_yfs(const struct xattr_handler *handler, struct inode *inode, const char *name, void *buffer, size_t size) { - struct afs_fs_cursor fc; - struct afs_status_cb *scb; + struct afs_operation *op; struct afs_vnode *vnode = AFS_FS_I(inode); struct yfs_acl *yacl = NULL; - struct key *key; char buf[16], *data; int which = 0, dsize, ret = -ENOMEM; @@ -193,75 +193,62 @@ static int afs_xattr_get_yfs(const struct xattr_handler *handler, else if (which == 3) yacl->flags |= YFS_ACL_WANT_VOL_ACL; - scb = kzalloc(sizeof(struct afs_status_cb), GFP_NOFS); - if (!scb) + op = afs_alloc_operation(NULL, vnode->volume); + if (IS_ERR(op)) goto error_yacl; - key = afs_request_key(vnode->volume->cell); - if (IS_ERR(key)) { - ret = PTR_ERR(key); - goto error_scb; - } + afs_op_set_vnode(op, 0, vnode); + op->yacl = yacl; + op->ops = &yfs_fetch_opaque_acl_operation; - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, vnode, key, true)) { - afs_dataversion_t data_version = vnode->status.data_version; + afs_begin_vnode_operation(op); + afs_wait_for_operation(op); + ret = afs_put_operation(op); - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(vnode); - yfs_fs_fetch_opaque_acl(&fc, yacl, scb); + if (ret == 0) { + switch (which) { + case 0: + data = yacl->acl->data; + dsize = yacl->acl->size; + break; + case 1: + data = buf; + dsize = scnprintf(buf, sizeof(buf), "%u", yacl->inherit_flag); + break; + case 2: + data = buf; + dsize = scnprintf(buf, sizeof(buf), "%u", yacl->num_cleaned); + break; + case 3: + data = yacl->vol_acl->data; + dsize = yacl->vol_acl->size; + break; + default: + ret = -EOPNOTSUPP; + goto error_yacl; } - afs_check_for_remote_deletion(&fc, fc.vnode); - afs_vnode_commit_status(&fc, vnode, fc.cb_break, - &data_version, scb); - ret = afs_end_vnode_operation(&fc); - } - - if (ret < 0) - goto error_key; - - switch (which) { - case 0: - data = yacl->acl->data; - dsize = yacl->acl->size; - break; - case 1: - data = buf; - dsize = scnprintf(buf, sizeof(buf), "%u", yacl->inherit_flag); - break; - case 2: - data = buf; - dsize = scnprintf(buf, sizeof(buf), "%u", yacl->num_cleaned); - break; - case 3: - data = yacl->vol_acl->data; - dsize = yacl->vol_acl->size; - break; - default: - ret = -EOPNOTSUPP; - goto error_key; - } - - ret = dsize; - if (size > 0) { - if (dsize > size) { - ret = -ERANGE; - goto error_key; + ret = dsize; + if (size > 0) { + if (dsize <= size) + memcpy(buffer, data, dsize); + else + ret = -ERANGE; } - memcpy(buffer, data, dsize); } -error_key: - key_put(key); -error_scb: - kfree(scb); error_yacl: yfs_free_opaque_acl(yacl); error: return ret; } +static const struct afs_operation_ops yfs_store_opaque_acl2_operation = { + .issue_yfs_rpc = yfs_fs_store_opaque_acl2, + .success = afs_acl_success, + .put = yfs_acl_put, +}; + /* * Set a file's YFS ACL. */ @@ -270,56 +257,23 @@ static int afs_xattr_set_yfs(const struct xattr_handler *handler, struct inode *inode, const char *name, const void *buffer, size_t size, int flags) { - struct afs_fs_cursor fc; - struct afs_status_cb *scb; + struct afs_operation *op; struct afs_vnode *vnode = AFS_FS_I(inode); - struct afs_acl *acl = NULL; - struct key *key; - int ret = -ENOMEM; if (flags == XATTR_CREATE || strcmp(name, "acl") != 0) return -EINVAL; - scb = kzalloc(sizeof(struct afs_status_cb), GFP_NOFS); - if (!scb) - goto error; - - acl = kmalloc(sizeof(*acl) + size, GFP_KERNEL); - if (!acl) - goto error_scb; + op = afs_alloc_operation(NULL, vnode->volume); + if (IS_ERR(op)) + return -ENOMEM; - acl->size = size; - memcpy(acl->data, buffer, size); + afs_op_set_vnode(op, 0, vnode); + if (!afs_make_acl(op, buffer, size)) + return afs_put_operation(op); - key = afs_request_key(vnode->volume->cell); - if (IS_ERR(key)) { - ret = PTR_ERR(key); - goto error_acl; - } - - ret = -ERESTARTSYS; - if (afs_begin_vnode_operation(&fc, vnode, key, true)) { - afs_dataversion_t data_version = vnode->status.data_version; - - while (afs_select_fileserver(&fc)) { - fc.cb_break = afs_calc_vnode_cb_break(vnode); - yfs_fs_store_opaque_acl2(&fc, acl, scb); - } - - afs_check_for_remote_deletion(&fc, fc.vnode); - afs_vnode_commit_status(&fc, vnode, fc.cb_break, - &data_version, scb); - ret = afs_end_vnode_operation(&fc); - } - -error_acl: - kfree(acl); - key_put(key); -error_scb: - kfree(scb); -error: - return ret; + op->ops = &yfs_store_opaque_acl2_operation; + return afs_do_sync_operation(op); } static const struct xattr_handler afs_xattr_yfs_handler = { diff --git a/fs/afs/yfsclient.c b/fs/afs/yfsclient.c index fe413e7..b0a6e40 100644 --- a/fs/afs/yfsclient.c +++ b/fs/afs/yfsclient.c @@ -17,11 +17,6 @@ static const struct afs_fid afs_zero_fid; -static inline void afs_use_fs_server(struct afs_call *call, struct afs_cb_interest *cbi) -{ - call->cbi = afs_get_cb_interest(cbi); -} - #define xdr_size(x) (sizeof(*x) / sizeof(__be32)) static void xdr_decode_YFSFid(const __be32 **_bp, struct afs_fid *fid) @@ -79,6 +74,11 @@ static __be32 *xdr_encode_string(__be32 *bp, const char *p, unsigned int len) return bp + len / sizeof(__be32); } +static __be32 *xdr_encode_name(__be32 *bp, const struct qstr *p) +{ + return xdr_encode_string(bp, p->name, p->len); +} + static s64 linux_to_yfs_time(const struct timespec64 *t) { /* Convert to 100ns intervals. */ @@ -179,21 +179,20 @@ static void xdr_dump_bad(const __be32 *bp) /* * Decode a YFSFetchStatus block */ -static int xdr_decode_YFSFetchStatus(const __be32 **_bp, - struct afs_call *call, - struct afs_status_cb *scb) +static void xdr_decode_YFSFetchStatus(const __be32 **_bp, + struct afs_call *call, + struct afs_status_cb *scb) { const struct yfs_xdr_YFSFetchStatus *xdr = (const void *)*_bp; struct afs_file_status *status = &scb->status; u32 type; - int ret; status->abort_code = ntohl(xdr->abort_code); if (status->abort_code != 0) { if (status->abort_code == VNOVNODE) status->nlink = 0; scb->have_error = true; - goto good; + goto advance; } type = ntohl(xdr->type); @@ -221,15 +220,13 @@ static int xdr_decode_YFSFetchStatus(const __be32 **_bp, status->size = xdr_to_u64(xdr->size); status->data_version = xdr_to_u64(xdr->data_version); scb->have_status = true; -good: - ret = 0; advance: *_bp += xdr_size(xdr); - return ret; + return; bad: xdr_dump_bad(*_bp); - ret = afs_protocol_error(call, -EBADMSG, afs_eproto_bad_status); + afs_protocol_error(call, afs_eproto_bad_status); goto advance; } @@ -339,6 +336,7 @@ static void xdr_decode_YFSFetchVolumeStatus(const __be32 **_bp, */ static int yfs_deliver_fs_status_cb_and_volsync(struct afs_call *call) { + struct afs_operation *op = call->op; const __be32 *bp; int ret; @@ -348,11 +346,9 @@ static int yfs_deliver_fs_status_cb_and_volsync(struct afs_call *call) /* unmarshall the reply once we've received all of it */ bp = call->buffer; - ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - xdr_decode_YFSCallBack(&bp, call, call->out_scb); - xdr_decode_YFSVolSync(&bp, call->out_volsync); + xdr_decode_YFSFetchStatus(&bp, call, &op->file[0].scb); + xdr_decode_YFSCallBack(&bp, call, &op->file[0].scb); + xdr_decode_YFSVolSync(&bp, &op->volsync); _leave(" = 0 [done]"); return 0; @@ -364,6 +360,7 @@ static int yfs_deliver_fs_status_cb_and_volsync(struct afs_call *call) */ static int yfs_deliver_status_and_volsync(struct afs_call *call) { + struct afs_operation *op = call->op; const __be32 *bp; int ret; @@ -372,10 +369,8 @@ static int yfs_deliver_status_and_volsync(struct afs_call *call) return ret; bp = call->buffer; - ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - xdr_decode_YFSVolSync(&bp, call->out_volsync); + xdr_decode_YFSFetchStatus(&bp, call, &op->file[0].scb); + xdr_decode_YFSVolSync(&bp, &op->volsync); _leave(" = 0 [done]"); return 0; @@ -394,44 +389,33 @@ static const struct afs_call_type yfs_RXYFSFetchStatus_vnode = { /* * Fetch the status information for a file. */ -int yfs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_status_cb *scb, - struct afs_volsync *volsync) +void yfs_fs_fetch_file_status(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); __be32 *bp; _enter(",%x,{%llx:%llu},,", - key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode); + key_serial(op->key), vp->fid.vid, vp->fid.vnode); - call = afs_alloc_flat_call(net, &yfs_RXYFSFetchStatus_vnode, + call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchStatus_vnode, sizeof(__be32) * 2 + sizeof(struct yfs_xdr_YFSFid), sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSCallBack) + sizeof(struct yfs_xdr_YFSVolSync)); - if (!call) { - fc->ac.error = -ENOMEM; - return -ENOMEM; - } - - call->key = fc->key; - call->out_scb = scb; - call->out_volsync = volsync; + if (!call) + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSFETCHSTATUS); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &vnode->fid); + bp = xdr_encode_YFSFid(bp, &vp->fid); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -439,7 +423,9 @@ int yfs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_status_cb *scb */ static int yfs_deliver_fs_fetch_data64(struct afs_call *call) { - struct afs_read *req = call->read_request; + struct afs_operation *op = call->op; + struct afs_vnode_param *vp = &op->file[0]; + struct afs_read *req = op->fetch.req; const __be32 *bp; unsigned int size; int ret; @@ -534,14 +520,12 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call) return ret; bp = call->buffer; - ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - xdr_decode_YFSCallBack(&bp, call, call->out_scb); - xdr_decode_YFSVolSync(&bp, call->out_volsync); + xdr_decode_YFSFetchStatus(&bp, call, &vp->scb); + xdr_decode_YFSCallBack(&bp, call, &vp->scb); + xdr_decode_YFSVolSync(&bp, &op->volsync); - req->data_version = call->out_scb->status.data_version; - req->file_size = call->out_scb->status.size; + req->data_version = vp->scb.status.data_version; + req->file_size = vp->scb.status.size; call->unmarshall++; /* Fall through */ @@ -565,12 +549,6 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call) return 0; } -static void yfs_fetch_data_destructor(struct afs_call *call) -{ - afs_put_read(call->read_request); - afs_flat_call_destructor(call); -} - /* * YFS.FetchData64 operation type */ @@ -578,25 +556,24 @@ static const struct afs_call_type yfs_RXYFSFetchData64 = { .name = "YFS.FetchData64", .op = yfs_FS_FetchData64, .deliver = yfs_deliver_fs_fetch_data64, - .destructor = yfs_fetch_data_destructor, + .destructor = afs_flat_call_destructor, }; /* * Fetch data from a file. */ -int yfs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_status_cb *scb, - struct afs_read *req) +void yfs_fs_fetch_data(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; + struct afs_read *req = op->fetch.req; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); __be32 *bp; _enter(",%x,{%llx:%llu},%llx,%llx", - key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode, + key_serial(op->key), vp->fid.vid, vp->fid.vnode, req->pos, req->len); - call = afs_alloc_flat_call(net, &yfs_RXYFSFetchData64, + call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchData64, sizeof(__be32) * 2 + sizeof(struct yfs_xdr_YFSFid) + sizeof(struct yfs_xdr_u64) * 2, @@ -604,27 +581,19 @@ int yfs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_status_cb *scb, sizeof(struct yfs_xdr_YFSCallBack) + sizeof(struct yfs_xdr_YFSVolSync)); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_scb = scb; - call->out_volsync = NULL; - call->read_request = afs_get_read(req); + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSFETCHDATA64); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &vnode->fid); + bp = xdr_encode_YFSFid(bp, &vp->fid); bp = xdr_encode_u64(bp, req->pos); bp = xdr_encode_u64(bp, req->len); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -632,6 +601,9 @@ int yfs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_status_cb *scb, */ static int yfs_deliver_fs_create_vnode(struct afs_call *call) { + struct afs_operation *op = call->op; + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode_param *vp = &op->file[1]; const __be32 *bp; int ret; @@ -643,15 +615,11 @@ static int yfs_deliver_fs_create_vnode(struct afs_call *call) /* unmarshall the reply once we've received all of it */ bp = call->buffer; - xdr_decode_YFSFid(&bp, call->out_fid); - ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb); - if (ret < 0) - return ret; - xdr_decode_YFSCallBack(&bp, call, call->out_scb); - xdr_decode_YFSVolSync(&bp, call->out_volsync); + xdr_decode_YFSFid(&bp, &op->file[1].fid); + xdr_decode_YFSFetchStatus(&bp, call, &vp->scb); + xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb); + xdr_decode_YFSCallBack(&bp, call, &vp->scb); + xdr_decode_YFSVolSync(&bp, &op->volsync); _leave(" = 0 [done]"); return 0; @@ -670,26 +638,20 @@ static const struct afs_call_type afs_RXFSCreateFile = { /* * Create a file. */ -int yfs_fs_create_file(struct afs_fs_cursor *fc, - const char *name, - umode_t mode, - struct afs_status_cb *dvnode_scb, - struct afs_fid *newfid, - struct afs_status_cb *new_scb) +void yfs_fs_create_file(struct afs_operation *op) { - struct afs_vnode *dvnode = fc->vnode; + const struct qstr *name = &op->dentry->d_name; + struct afs_vnode_param *dvp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(dvnode); - size_t namesz, reqsz, rplsz; + size_t reqsz, rplsz; __be32 *bp; _enter(""); - namesz = strlen(name); reqsz = (sizeof(__be32) + sizeof(__be32) + sizeof(struct yfs_xdr_YFSFid) + - xdr_strlen(namesz) + + xdr_strlen(name->len) + sizeof(struct yfs_xdr_YFSStoreStatus) + sizeof(__be32)); rplsz = (sizeof(struct yfs_xdr_YFSFid) + @@ -698,30 +660,22 @@ int yfs_fs_create_file(struct afs_fs_cursor *fc, sizeof(struct yfs_xdr_YFSCallBack) + sizeof(struct yfs_xdr_YFSVolSync)); - call = afs_alloc_flat_call(net, &afs_RXFSCreateFile, reqsz, rplsz); + call = afs_alloc_flat_call(op->net, &afs_RXFSCreateFile, reqsz, rplsz); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_dir_scb = dvnode_scb; - call->out_fid = newfid; - call->out_scb = new_scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSCREATEFILE); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &dvnode->fid); - bp = xdr_encode_string(bp, name, namesz); - bp = xdr_encode_YFSStoreStatus_mode(bp, mode); + bp = xdr_encode_YFSFid(bp, &dvp->fid); + bp = xdr_encode_name(bp, name); + bp = xdr_encode_YFSStoreStatus_mode(bp, op->create.mode); bp = xdr_encode_u32(bp, yfs_LockNone); /* ViceLockType */ yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call1(call, &dvnode->fid, name); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call1(call, &dvp->fid, name); + afs_make_op_call(op, call, GFP_NOFS); } static const struct afs_call_type yfs_RXFSMakeDir = { @@ -734,26 +688,20 @@ static const struct afs_call_type yfs_RXFSMakeDir = { /* * Make a directory. */ -int yfs_fs_make_dir(struct afs_fs_cursor *fc, - const char *name, - umode_t mode, - struct afs_status_cb *dvnode_scb, - struct afs_fid *newfid, - struct afs_status_cb *new_scb) +void yfs_fs_make_dir(struct afs_operation *op) { - struct afs_vnode *dvnode = fc->vnode; + const struct qstr *name = &op->dentry->d_name; + struct afs_vnode_param *dvp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(dvnode); - size_t namesz, reqsz, rplsz; + size_t reqsz, rplsz; __be32 *bp; _enter(""); - namesz = strlen(name); reqsz = (sizeof(__be32) + sizeof(struct yfs_xdr_RPCFlags) + sizeof(struct yfs_xdr_YFSFid) + - xdr_strlen(namesz) + + xdr_strlen(name->len) + sizeof(struct yfs_xdr_YFSStoreStatus)); rplsz = (sizeof(struct yfs_xdr_YFSFid) + sizeof(struct yfs_xdr_YFSFetchStatus) + @@ -761,29 +709,21 @@ int yfs_fs_make_dir(struct afs_fs_cursor *fc, sizeof(struct yfs_xdr_YFSCallBack) + sizeof(struct yfs_xdr_YFSVolSync)); - call = afs_alloc_flat_call(net, &yfs_RXFSMakeDir, reqsz, rplsz); + call = afs_alloc_flat_call(op->net, &yfs_RXFSMakeDir, reqsz, rplsz); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_dir_scb = dvnode_scb; - call->out_fid = newfid; - call->out_scb = new_scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSMAKEDIR); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &dvnode->fid); - bp = xdr_encode_string(bp, name, namesz); - bp = xdr_encode_YFSStoreStatus_mode(bp, mode); + bp = xdr_encode_YFSFid(bp, &dvp->fid); + bp = xdr_encode_name(bp, name); + bp = xdr_encode_YFSStoreStatus_mode(bp, op->create.mode); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call1(call, &dvnode->fid, name); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call1(call, &dvp->fid, name); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -791,6 +731,9 @@ int yfs_fs_make_dir(struct afs_fs_cursor *fc, */ static int yfs_deliver_fs_remove_file2(struct afs_call *call) { + struct afs_operation *op = call->op; + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode_param *vp = &op->file[1]; struct afs_fid fid; const __be32 *bp; int ret; @@ -802,20 +745,24 @@ static int yfs_deliver_fs_remove_file2(struct afs_call *call) return ret; bp = call->buffer; - ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb); - if (ret < 0) - return ret; - + xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb); xdr_decode_YFSFid(&bp, &fid); - ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; + xdr_decode_YFSFetchStatus(&bp, call, &vp->scb); /* Was deleted if vnode->status.abort_code == VNOVNODE. */ - xdr_decode_YFSVolSync(&bp, call->out_volsync); + xdr_decode_YFSVolSync(&bp, &op->volsync); return 0; } +static void yfs_done_fs_remove_file2(struct afs_call *call) +{ + if (call->error == -ECONNABORTED && + call->abort_code == RX_INVALID_OPERATION) { + set_bit(AFS_SERVER_FL_NO_RM2, &call->server->flags); + call->op->flags |= AFS_OPERATION_DOWNGRADE; + } +} + /* * YFS.RemoveFile2 operation type. */ @@ -823,55 +770,44 @@ static const struct afs_call_type yfs_RXYFSRemoveFile2 = { .name = "YFS.RemoveFile2", .op = yfs_FS_RemoveFile2, .deliver = yfs_deliver_fs_remove_file2, + .done = yfs_done_fs_remove_file2, .destructor = afs_flat_call_destructor, }; /* * Remove a file and retrieve new file status. */ -int yfs_fs_remove_file2(struct afs_fs_cursor *fc, struct afs_vnode *vnode, - const char *name, struct afs_status_cb *dvnode_scb, - struct afs_status_cb *vnode_scb) +void yfs_fs_remove_file2(struct afs_operation *op) { - struct afs_vnode *dvnode = fc->vnode; + struct afs_vnode_param *dvp = &op->file[0]; + const struct qstr *name = &op->dentry->d_name; struct afs_call *call; - struct afs_net *net = afs_v2net(dvnode); - size_t namesz; __be32 *bp; _enter(""); - namesz = strlen(name); - - call = afs_alloc_flat_call(net, &yfs_RXYFSRemoveFile2, + call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile2, sizeof(__be32) + sizeof(struct yfs_xdr_RPCFlags) + sizeof(struct yfs_xdr_YFSFid) + - xdr_strlen(namesz), + xdr_strlen(name->len), sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSFid) + sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSVolSync)); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_dir_scb = dvnode_scb; - call->out_scb = vnode_scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSREMOVEFILE2); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &dvnode->fid); - bp = xdr_encode_string(bp, name, namesz); + bp = xdr_encode_YFSFid(bp, &dvp->fid); + bp = xdr_encode_name(bp, name); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call1(call, &dvnode->fid, name); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call1(call, &dvp->fid, name); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -879,6 +815,8 @@ int yfs_fs_remove_file2(struct afs_fs_cursor *fc, struct afs_vnode *vnode, */ static int yfs_deliver_fs_remove(struct afs_call *call) { + struct afs_operation *op = call->op; + struct afs_vnode_param *dvp = &op->file[0]; const __be32 *bp; int ret; @@ -889,11 +827,8 @@ static int yfs_deliver_fs_remove(struct afs_call *call) return ret; bp = call->buffer; - ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb); - if (ret < 0) - return ret; - - xdr_decode_YFSVolSync(&bp, call->out_volsync); + xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb); + xdr_decode_YFSVolSync(&bp, &op->volsync); return 0; } @@ -907,6 +842,43 @@ static const struct afs_call_type yfs_RXYFSRemoveFile = { .destructor = afs_flat_call_destructor, }; +/* + * Remove a file. + */ +void yfs_fs_remove_file(struct afs_operation *op) +{ + const struct qstr *name = &op->dentry->d_name; + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_call *call; + __be32 *bp; + + _enter(""); + + if (!test_bit(AFS_SERVER_FL_NO_RM2, &op->server->flags)) + return yfs_fs_remove_file2(op); + + call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile, + sizeof(__be32) + + sizeof(struct yfs_xdr_RPCFlags) + + sizeof(struct yfs_xdr_YFSFid) + + xdr_strlen(name->len), + sizeof(struct yfs_xdr_YFSFetchStatus) + + sizeof(struct yfs_xdr_YFSVolSync)); + if (!call) + return afs_op_nomem(op); + + /* marshall the parameters */ + bp = call->request; + bp = xdr_encode_u32(bp, YFSREMOVEFILE); + bp = xdr_encode_u32(bp, 0); /* RPC flags */ + bp = xdr_encode_YFSFid(bp, &dvp->fid); + bp = xdr_encode_name(bp, name); + yfs_check_req(call, bp); + + trace_afs_make_fs_call1(call, &dvp->fid, name); + afs_make_op_call(op, call, GFP_NOFS); +} + static const struct afs_call_type yfs_RXYFSRemoveDir = { .name = "YFS.RemoveDir", .op = yfs_FS_RemoveDir, @@ -915,48 +887,37 @@ static const struct afs_call_type yfs_RXYFSRemoveDir = { }; /* - * remove a file or directory + * Remove a directory. */ -int yfs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode, - const char *name, bool isdir, - struct afs_status_cb *dvnode_scb) +void yfs_fs_remove_dir(struct afs_operation *op) { - struct afs_vnode *dvnode = fc->vnode; + const struct qstr *name = &op->dentry->d_name; + struct afs_vnode_param *dvp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(dvnode); - size_t namesz; __be32 *bp; _enter(""); - namesz = strlen(name); - call = afs_alloc_flat_call( - net, isdir ? &yfs_RXYFSRemoveDir : &yfs_RXYFSRemoveFile, - sizeof(__be32) + - sizeof(struct yfs_xdr_RPCFlags) + - sizeof(struct yfs_xdr_YFSFid) + - xdr_strlen(namesz), - sizeof(struct yfs_xdr_YFSFetchStatus) + - sizeof(struct yfs_xdr_YFSVolSync)); + call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveDir, + sizeof(__be32) + + sizeof(struct yfs_xdr_RPCFlags) + + sizeof(struct yfs_xdr_YFSFid) + + xdr_strlen(name->len), + sizeof(struct yfs_xdr_YFSFetchStatus) + + sizeof(struct yfs_xdr_YFSVolSync)); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_dir_scb = dvnode_scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; - bp = xdr_encode_u32(bp, isdir ? YFSREMOVEDIR : YFSREMOVEFILE); + bp = xdr_encode_u32(bp, YFSREMOVEDIR); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &dvnode->fid); - bp = xdr_encode_string(bp, name, namesz); + bp = xdr_encode_YFSFid(bp, &dvp->fid); + bp = xdr_encode_name(bp, name); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call1(call, &dvnode->fid, name); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call1(call, &dvp->fid, name); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -964,6 +925,9 @@ int yfs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode, */ static int yfs_deliver_fs_link(struct afs_call *call) { + struct afs_operation *op = call->op; + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode_param *vp = &op->file[1]; const __be32 *bp; int ret; @@ -974,13 +938,9 @@ static int yfs_deliver_fs_link(struct afs_call *call) return ret; bp = call->buffer; - ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb); - if (ret < 0) - return ret; - xdr_decode_YFSVolSync(&bp, call->out_volsync); + xdr_decode_YFSFetchStatus(&bp, call, &vp->scb); + xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb); + xdr_decode_YFSVolSync(&bp, &op->volsync); _leave(" = 0 [done]"); return 0; } @@ -998,50 +958,39 @@ static const struct afs_call_type yfs_RXYFSLink = { /* * Make a hard link. */ -int yfs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode, - const char *name, - struct afs_status_cb *dvnode_scb, - struct afs_status_cb *vnode_scb) +void yfs_fs_link(struct afs_operation *op) { - struct afs_vnode *dvnode = fc->vnode; + const struct qstr *name = &op->dentry->d_name; + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode_param *vp = &op->file[1]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); - size_t namesz; __be32 *bp; _enter(""); - namesz = strlen(name); - call = afs_alloc_flat_call(net, &yfs_RXYFSLink, + call = afs_alloc_flat_call(op->net, &yfs_RXYFSLink, sizeof(__be32) + sizeof(struct yfs_xdr_RPCFlags) + sizeof(struct yfs_xdr_YFSFid) + - xdr_strlen(namesz) + + xdr_strlen(name->len) + sizeof(struct yfs_xdr_YFSFid), sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSVolSync)); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_dir_scb = dvnode_scb; - call->out_scb = vnode_scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSLINK); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &dvnode->fid); - bp = xdr_encode_string(bp, name, namesz); - bp = xdr_encode_YFSFid(bp, &vnode->fid); + bp = xdr_encode_YFSFid(bp, &dvp->fid); + bp = xdr_encode_name(bp, name); + bp = xdr_encode_YFSFid(bp, &vp->fid); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call1(call, &vnode->fid, name); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call1(call, &vp->fid, name); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -1049,6 +998,9 @@ int yfs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode, */ static int yfs_deliver_fs_symlink(struct afs_call *call) { + struct afs_operation *op = call->op; + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode_param *vp = &op->file[1]; const __be32 *bp; int ret; @@ -1060,14 +1012,10 @@ static int yfs_deliver_fs_symlink(struct afs_call *call) /* unmarshall the reply once we've received all of it */ bp = call->buffer; - xdr_decode_YFSFid(&bp, call->out_fid); - ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb); - if (ret < 0) - return ret; - xdr_decode_YFSVolSync(&bp, call->out_volsync); + xdr_decode_YFSFid(&bp, &vp->fid); + xdr_decode_YFSFetchStatus(&bp, call, &vp->scb); + xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb); + xdr_decode_YFSVolSync(&bp, &op->volsync); _leave(" = 0 [done]"); return 0; @@ -1086,28 +1034,22 @@ static const struct afs_call_type yfs_RXYFSSymlink = { /* * Create a symbolic link. */ -int yfs_fs_symlink(struct afs_fs_cursor *fc, - const char *name, - const char *contents, - struct afs_status_cb *dvnode_scb, - struct afs_fid *newfid, - struct afs_status_cb *vnode_scb) +void yfs_fs_symlink(struct afs_operation *op) { - struct afs_vnode *dvnode = fc->vnode; + const struct qstr *name = &op->dentry->d_name; + struct afs_vnode_param *dvp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(dvnode); - size_t namesz, contents_sz; + size_t contents_sz; __be32 *bp; _enter(""); - namesz = strlen(name); - contents_sz = strlen(contents); - call = afs_alloc_flat_call(net, &yfs_RXYFSSymlink, + contents_sz = strlen(op->create.symlink); + call = afs_alloc_flat_call(op->net, &yfs_RXYFSSymlink, sizeof(__be32) + sizeof(struct yfs_xdr_RPCFlags) + sizeof(struct yfs_xdr_YFSFid) + - xdr_strlen(namesz) + + xdr_strlen(name->len) + xdr_strlen(contents_sz) + sizeof(struct yfs_xdr_YFSStoreStatus), sizeof(struct yfs_xdr_YFSFid) + @@ -1115,28 +1057,20 @@ int yfs_fs_symlink(struct afs_fs_cursor *fc, sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSVolSync)); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_dir_scb = dvnode_scb; - call->out_fid = newfid; - call->out_scb = vnode_scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSSYMLINK); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &dvnode->fid); - bp = xdr_encode_string(bp, name, namesz); - bp = xdr_encode_string(bp, contents, contents_sz); + bp = xdr_encode_YFSFid(bp, &dvp->fid); + bp = xdr_encode_name(bp, name); + bp = xdr_encode_string(bp, op->create.symlink, contents_sz); bp = xdr_encode_YFSStoreStatus_mode(bp, S_IRWXUGO); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call1(call, &dvnode->fid, name); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call1(call, &dvp->fid, name); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -1144,6 +1078,9 @@ int yfs_fs_symlink(struct afs_fs_cursor *fc, */ static int yfs_deliver_fs_rename(struct afs_call *call) { + struct afs_operation *op = call->op; + struct afs_vnode_param *orig_dvp = &op->file[0]; + struct afs_vnode_param *new_dvp = &op->file[1]; const __be32 *bp; int ret; @@ -1154,14 +1091,12 @@ static int yfs_deliver_fs_rename(struct afs_call *call) return ret; bp = call->buffer; - ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb); - if (ret < 0) - return ret; - ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - - xdr_decode_YFSVolSync(&bp, call->out_volsync); + /* If the two dirs are the same, we have two copies of the same status + * report, so we just decode it twice. + */ + xdr_decode_YFSFetchStatus(&bp, call, &orig_dvp->scb); + xdr_decode_YFSFetchStatus(&bp, call, &new_dvp->scb); + xdr_decode_YFSVolSync(&bp, &op->volsync); _leave(" = 0 [done]"); return 0; } @@ -1179,55 +1114,42 @@ static const struct afs_call_type yfs_RXYFSRename = { /* * Rename a file or directory. */ -int yfs_fs_rename(struct afs_fs_cursor *fc, - const char *orig_name, - struct afs_vnode *new_dvnode, - const char *new_name, - struct afs_status_cb *orig_dvnode_scb, - struct afs_status_cb *new_dvnode_scb) +void yfs_fs_rename(struct afs_operation *op) { - struct afs_vnode *orig_dvnode = fc->vnode; + struct afs_vnode_param *orig_dvp = &op->file[0]; + struct afs_vnode_param *new_dvp = &op->file[1]; + const struct qstr *orig_name = &op->dentry->d_name; + const struct qstr *new_name = &op->dentry_2->d_name; struct afs_call *call; - struct afs_net *net = afs_v2net(orig_dvnode); - size_t o_namesz, n_namesz; __be32 *bp; _enter(""); - o_namesz = strlen(orig_name); - n_namesz = strlen(new_name); - call = afs_alloc_flat_call(net, &yfs_RXYFSRename, + call = afs_alloc_flat_call(op->net, &yfs_RXYFSRename, sizeof(__be32) + sizeof(struct yfs_xdr_RPCFlags) + sizeof(struct yfs_xdr_YFSFid) + - xdr_strlen(o_namesz) + + xdr_strlen(orig_name->len) + sizeof(struct yfs_xdr_YFSFid) + - xdr_strlen(n_namesz), + xdr_strlen(new_name->len), sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSVolSync)); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_dir_scb = orig_dvnode_scb; - call->out_scb = new_dvnode_scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSRENAME); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &orig_dvnode->fid); - bp = xdr_encode_string(bp, orig_name, o_namesz); - bp = xdr_encode_YFSFid(bp, &new_dvnode->fid); - bp = xdr_encode_string(bp, new_name, n_namesz); + bp = xdr_encode_YFSFid(bp, &orig_dvp->fid); + bp = xdr_encode_name(bp, orig_name); + bp = xdr_encode_YFSFid(bp, &new_dvp->fid); + bp = xdr_encode_name(bp, new_name); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call2(call, &orig_dvnode->fid, orig_name, new_name); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call2(call, &orig_dvp->fid, orig_name, new_name); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -1243,27 +1165,23 @@ static const struct afs_call_type yfs_RXYFSStoreData64 = { /* * Store a set of pages to a large file. */ -int yfs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping, - pgoff_t first, pgoff_t last, - unsigned offset, unsigned to, - struct afs_status_cb *scb) +void yfs_fs_store_data(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); loff_t size, pos, i_size; __be32 *bp; _enter(",%x,{%llx:%llu},,", - key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode); + key_serial(op->key), vp->fid.vid, vp->fid.vnode); - size = (loff_t)to - (loff_t)offset; - if (first != last) - size += (loff_t)(last - first) << PAGE_SHIFT; - pos = (loff_t)first << PAGE_SHIFT; - pos += offset; + size = (loff_t)op->store.last_to - (loff_t)op->store.first_offset; + if (op->store.first != op->store.last) + size += (loff_t)(op->store.last - op->store.first) << PAGE_SHIFT; + pos = (loff_t)op->store.first << PAGE_SHIFT; + pos += op->store.first_offset; - i_size = i_size_read(&vnode->vfs_inode); + i_size = i_size_read(&vp->vnode->vfs_inode); if (pos + size > i_size) i_size = size + pos; @@ -1271,7 +1189,7 @@ int yfs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping, (unsigned long long)size, (unsigned long long)pos, (unsigned long long)i_size); - call = afs_alloc_flat_call(net, &yfs_RXYFSStoreData64, + call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64, sizeof(__be32) + sizeof(__be32) + sizeof(struct yfs_xdr_YFSFid) + @@ -1280,33 +1198,24 @@ int yfs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping, sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSVolSync)); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->mapping = mapping; - call->first = first; - call->last = last; - call->first_offset = offset; - call->last_to = to; + return afs_op_nomem(op); + + call->key = op->key; call->send_pages = true; - call->out_scb = scb; /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSSTOREDATA64); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &vnode->fid); - bp = xdr_encode_YFSStoreStatus_mtime(bp, &vnode->vfs_inode.i_mtime); + bp = xdr_encode_YFSFid(bp, &vp->fid); + bp = xdr_encode_YFSStoreStatus_mtime(bp, &op->mtime); bp = xdr_encode_u64(bp, pos); bp = xdr_encode_u64(bp, size); bp = xdr_encode_u64(bp, i_size); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -1330,18 +1239,17 @@ static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = { * Set the attributes on a file, using YFS.StoreData64 rather than * YFS.StoreStatus so as to alter the file size also. */ -static int yfs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr, - struct afs_status_cb *scb) +static void yfs_fs_setattr_size(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); + struct iattr *attr = op->setattr.attr; __be32 *bp; _enter(",%x,{%llx:%llu},,", - key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode); + key_serial(op->key), vp->fid.vid, vp->fid.vnode); - call = afs_alloc_flat_call(net, &yfs_RXYFSStoreData64_as_Status, + call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64_as_Status, sizeof(__be32) * 2 + sizeof(struct yfs_xdr_YFSFid) + sizeof(struct yfs_xdr_YFSStoreStatus) + @@ -1349,72 +1257,59 @@ static int yfs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr, sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSVolSync)); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_scb = scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSSTOREDATA64); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &vnode->fid); + bp = xdr_encode_YFSFid(bp, &vp->fid); bp = xdr_encode_YFS_StoreStatus(bp, attr); bp = xdr_encode_u64(bp, attr->ia_size); /* position of start of write */ bp = xdr_encode_u64(bp, 0); /* size of write */ bp = xdr_encode_u64(bp, attr->ia_size); /* new file length */ yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* * Set the attributes on a file, using YFS.StoreData64 if there's a change in * file size, and YFS.StoreStatus otherwise. */ -int yfs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr, - struct afs_status_cb *scb) +void yfs_fs_setattr(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); + struct iattr *attr = op->setattr.attr; __be32 *bp; if (attr->ia_valid & ATTR_SIZE) - return yfs_fs_setattr_size(fc, attr, scb); + return yfs_fs_setattr_size(op); _enter(",%x,{%llx:%llu},,", - key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode); + key_serial(op->key), vp->fid.vid, vp->fid.vnode); - call = afs_alloc_flat_call(net, &yfs_RXYFSStoreStatus, + call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreStatus, sizeof(__be32) * 2 + sizeof(struct yfs_xdr_YFSFid) + sizeof(struct yfs_xdr_YFSStoreStatus), sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSVolSync)); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_scb = scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSSTORESTATUS); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &vnode->fid); + bp = xdr_encode_YFSFid(bp, &vp->fid); bp = xdr_encode_YFS_StoreStatus(bp, attr); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -1422,6 +1317,7 @@ int yfs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr, */ static int yfs_deliver_fs_get_volume_status(struct afs_call *call) { + struct afs_operation *op = call->op; const __be32 *bp; char *p; u32 size; @@ -1443,7 +1339,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call) return ret; bp = call->buffer; - xdr_decode_YFSFetchVolumeStatus(&bp, call->out_volstatus); + xdr_decode_YFSFetchVolumeStatus(&bp, &op->volstatus.vs); call->unmarshall++; afs_extract_to_tmp(call); /* Fall through */ @@ -1457,8 +1353,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call) call->count = ntohl(call->tmp); _debug("volname length: %u", call->count); if (call->count >= AFSNAMEMAX) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_volname_len); + return afs_protocol_error(call, afs_eproto_volname_len); size = (call->count + 3) & ~3; /* It's padded */ afs_extract_to_buf(call, size); call->unmarshall++; @@ -1487,8 +1382,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call) call->count = ntohl(call->tmp); _debug("offline msg length: %u", call->count); if (call->count >= AFSNAMEMAX) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_offline_msg_len); + return afs_protocol_error(call, afs_eproto_offline_msg_len); size = (call->count + 3) & ~3; /* It's padded */ afs_extract_to_buf(call, size); call->unmarshall++; @@ -1518,8 +1412,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call) call->count = ntohl(call->tmp); _debug("motd length: %u", call->count); if (call->count >= AFSNAMEMAX) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_motd_len); + return afs_protocol_error(call, afs_eproto_motd_len); size = (call->count + 3) & ~3; /* It's padded */ afs_extract_to_buf(call, size); call->unmarshall++; @@ -1560,17 +1453,15 @@ static const struct afs_call_type yfs_RXYFSGetVolumeStatus = { /* * fetch the status of a volume */ -int yfs_fs_get_volume_status(struct afs_fs_cursor *fc, - struct afs_volume_status *vs) +void yfs_fs_get_volume_status(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); __be32 *bp; _enter(""); - call = afs_alloc_flat_call(net, &yfs_RXYFSGetVolumeStatus, + call = afs_alloc_flat_call(op->net, &yfs_RXYFSGetVolumeStatus, sizeof(__be32) * 2 + sizeof(struct yfs_xdr_u64), max_t(size_t, @@ -1578,23 +1469,17 @@ int yfs_fs_get_volume_status(struct afs_fs_cursor *fc, sizeof(__be32), AFSOPAQUEMAX + 1)); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->out_volstatus = vs; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSGETVOLUMESTATUS); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_u64(bp, vnode->fid.vid); + bp = xdr_encode_u64(bp, vp->fid.vid); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -1632,118 +1517,93 @@ static const struct afs_call_type yfs_RXYFSReleaseLock = { /* * Set a lock on a file */ -int yfs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type, - struct afs_status_cb *scb) +void yfs_fs_set_lock(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); __be32 *bp; _enter(""); - call = afs_alloc_flat_call(net, &yfs_RXYFSSetLock, + call = afs_alloc_flat_call(op->net, &yfs_RXYFSSetLock, sizeof(__be32) * 2 + sizeof(struct yfs_xdr_YFSFid) + sizeof(__be32), sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSVolSync)); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->lvnode = vnode; - call->out_scb = scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSSETLOCK); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &vnode->fid); - bp = xdr_encode_u32(bp, type); + bp = xdr_encode_YFSFid(bp, &vp->fid); + bp = xdr_encode_u32(bp, op->lock.type); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_calli(call, &vnode->fid, type); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_calli(call, &vp->fid, op->lock.type); + afs_make_op_call(op, call, GFP_NOFS); } /* * extend a lock on a file */ -int yfs_fs_extend_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb) +void yfs_fs_extend_lock(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); __be32 *bp; _enter(""); - call = afs_alloc_flat_call(net, &yfs_RXYFSExtendLock, + call = afs_alloc_flat_call(op->net, &yfs_RXYFSExtendLock, sizeof(__be32) * 2 + sizeof(struct yfs_xdr_YFSFid), sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSVolSync)); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->lvnode = vnode; - call->out_scb = scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSEXTENDLOCK); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &vnode->fid); + bp = xdr_encode_YFSFid(bp, &vp->fid); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* * release a lock on a file */ -int yfs_fs_release_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb) +void yfs_fs_release_lock(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); __be32 *bp; _enter(""); - call = afs_alloc_flat_call(net, &yfs_RXYFSReleaseLock, + call = afs_alloc_flat_call(op->net, &yfs_RXYFSReleaseLock, sizeof(__be32) * 2 + sizeof(struct yfs_xdr_YFSFid), sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSVolSync)); if (!call) - return -ENOMEM; - - call->key = fc->key; - call->lvnode = vnode; - call->out_scb = scb; + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSRELEASELOCK); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &vnode->fid); + bp = xdr_encode_YFSFid(bp, &vp->fid); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -1759,45 +1619,33 @@ static const struct afs_call_type yfs_RXYFSFetchStatus = { /* * Fetch the status information for a fid without needing a vnode handle. */ -int yfs_fs_fetch_status(struct afs_fs_cursor *fc, - struct afs_net *net, - struct afs_fid *fid, - struct afs_status_cb *scb, - struct afs_volsync *volsync) +void yfs_fs_fetch_status(struct afs_operation *op) { + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; __be32 *bp; _enter(",%x,{%llx:%llu},,", - key_serial(fc->key), fid->vid, fid->vnode); + key_serial(op->key), vp->fid.vid, vp->fid.vnode); - call = afs_alloc_flat_call(net, &yfs_RXYFSFetchStatus, + call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchStatus, sizeof(__be32) * 2 + sizeof(struct yfs_xdr_YFSFid), sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSCallBack) + sizeof(struct yfs_xdr_YFSVolSync)); - if (!call) { - fc->ac.error = -ENOMEM; - return -ENOMEM; - } - - call->key = fc->key; - call->out_scb = scb; - call->out_volsync = volsync; + if (!call) + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSFETCHSTATUS); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, fid); + bp = xdr_encode_YFSFid(bp, &vp->fid); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, fid); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -1805,6 +1653,7 @@ int yfs_fs_fetch_status(struct afs_fs_cursor *fc, */ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call) { + struct afs_operation *op = call->op; struct afs_status_cb *scb; const __be32 *bp; u32 tmp; @@ -1826,10 +1675,9 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call) return ret; tmp = ntohl(call->tmp); - _debug("status count: %u/%u", tmp, call->count2); - if (tmp != call->count2) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_ibulkst_count); + _debug("status count: %u/%u", tmp, op->nr_files); + if (tmp != op->nr_files) + return afs_protocol_error(call, afs_eproto_ibulkst_count); call->count = 0; call->unmarshall++; @@ -1843,14 +1691,23 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call) if (ret < 0) return ret; + switch (call->count) { + case 0: + scb = &op->file[0].scb; + break; + case 1: + scb = &op->file[1].scb; + break; + default: + scb = &op->more_files[call->count - 2].scb; + break; + } + bp = call->buffer; - scb = &call->out_scb[call->count]; - ret = xdr_decode_YFSFetchStatus(&bp, call, scb); - if (ret < 0) - return ret; + xdr_decode_YFSFetchStatus(&bp, call, scb); call->count++; - if (call->count < call->count2) + if (call->count < op->nr_files) goto more_counts; call->count = 0; @@ -1867,9 +1724,8 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call) tmp = ntohl(call->tmp); _debug("CB count: %u", tmp); - if (tmp != call->count2) - return afs_protocol_error(call, -EBADMSG, - afs_eproto_ibulkst_cb_count); + if (tmp != op->nr_files) + return afs_protocol_error(call, afs_eproto_ibulkst_cb_count); call->count = 0; call->unmarshall++; more_cbs: @@ -1883,11 +1739,22 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call) return ret; _debug("unmarshall CB array"); + switch (call->count) { + case 0: + scb = &op->file[0].scb; + break; + case 1: + scb = &op->file[1].scb; + break; + default: + scb = &op->more_files[call->count - 2].scb; + break; + } + bp = call->buffer; - scb = &call->out_scb[call->count]; xdr_decode_YFSCallBack(&bp, call, scb); call->count++; - if (call->count < call->count2) + if (call->count < op->nr_files) goto more_cbs; afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync)); @@ -1900,7 +1767,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call) return ret; bp = call->buffer; - xdr_decode_YFSVolSync(&bp, call->out_volsync); + xdr_decode_YFSVolSync(&bp, &op->volsync); call->unmarshall++; /* Fall through */ @@ -1926,50 +1793,39 @@ static const struct afs_call_type yfs_RXYFSInlineBulkStatus = { /* * Fetch the status information for up to 1024 files */ -int yfs_fs_inline_bulk_status(struct afs_fs_cursor *fc, - struct afs_net *net, - struct afs_fid *fids, - struct afs_status_cb *statuses, - unsigned int nr_fids, - struct afs_volsync *volsync) +void yfs_fs_inline_bulk_status(struct afs_operation *op) { + struct afs_vnode_param *dvp = &op->file[0]; + struct afs_vnode_param *vp = &op->file[1]; struct afs_call *call; __be32 *bp; int i; _enter(",%x,{%llx:%llu},%u", - key_serial(fc->key), fids[0].vid, fids[1].vnode, nr_fids); + key_serial(op->key), vp->fid.vid, vp->fid.vnode, op->nr_files); - call = afs_alloc_flat_call(net, &yfs_RXYFSInlineBulkStatus, + call = afs_alloc_flat_call(op->net, &yfs_RXYFSInlineBulkStatus, sizeof(__be32) + sizeof(__be32) + sizeof(__be32) + - sizeof(struct yfs_xdr_YFSFid) * nr_fids, + sizeof(struct yfs_xdr_YFSFid) * op->nr_files, sizeof(struct yfs_xdr_YFSFetchStatus)); - if (!call) { - fc->ac.error = -ENOMEM; - return -ENOMEM; - } - - call->key = fc->key; - call->out_scb = statuses; - call->out_volsync = volsync; - call->count2 = nr_fids; + if (!call) + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSINLINEBULKSTATUS); bp = xdr_encode_u32(bp, 0); /* RPCFlags */ - bp = xdr_encode_u32(bp, nr_fids); - for (i = 0; i < nr_fids; i++) - bp = xdr_encode_YFSFid(bp, &fids[i]); + bp = xdr_encode_u32(bp, op->nr_files); + bp = xdr_encode_YFSFid(bp, &dvp->fid); + bp = xdr_encode_YFSFid(bp, &vp->fid); + for (i = 0; i < op->nr_files - 2; i++) + bp = xdr_encode_YFSFid(bp, &op->more_files[i].fid); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &fids[0]); - afs_set_fc_call(call, fc); - afs_make_call(&fc->ac, call, GFP_NOFS); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_NOFS); } /* @@ -1977,7 +1833,9 @@ int yfs_fs_inline_bulk_status(struct afs_fs_cursor *fc, */ static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call) { - struct yfs_acl *yacl = call->out_yacl; + struct afs_operation *op = call->op; + struct afs_vnode_param *vp = &op->file[0]; + struct yfs_acl *yacl = op->yacl; struct afs_acl *acl; const __be32 *bp; unsigned int size; @@ -2067,10 +1925,8 @@ static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call) bp = call->buffer; yacl->inherit_flag = ntohl(*bp++); yacl->num_cleaned = ntohl(*bp++); - ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb); - if (ret < 0) - return ret; - xdr_decode_YFSVolSync(&bp, call->out_volsync); + xdr_decode_YFSFetchStatus(&bp, call, &vp->scb); + xdr_decode_YFSVolSync(&bp, &op->volsync); call->unmarshall++; /* Fall through */ @@ -2105,45 +1961,33 @@ static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = { /* * Fetch the YFS advanced ACLs for a file. */ -struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *fc, - struct yfs_acl *yacl, - struct afs_status_cb *scb) +void yfs_fs_fetch_opaque_acl(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); __be32 *bp; _enter(",%x,{%llx:%llu},,", - key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode); + key_serial(op->key), vp->fid.vid, vp->fid.vnode); - call = afs_alloc_flat_call(net, &yfs_RXYFSFetchOpaqueACL, + call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchOpaqueACL, sizeof(__be32) * 2 + sizeof(struct yfs_xdr_YFSFid), sizeof(__be32) * 2 + sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSVolSync)); - if (!call) { - fc->ac.error = -ENOMEM; - return ERR_PTR(-ENOMEM); - } - - call->key = fc->key; - call->out_yacl = yacl; - call->out_scb = scb; - call->out_volsync = NULL; + if (!call) + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSFETCHOPAQUEACL); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &vnode->fid); + bp = xdr_encode_YFSFid(bp, &vp->fid); yfs_check_req(call, bp); - afs_use_fs_server(call, fc->cbi); - trace_afs_make_fs_call(call, &vnode->fid); - afs_make_call(&fc->ac, call, GFP_KERNEL); - return (struct yfs_acl *)afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_KERNEL); } /* @@ -2159,46 +2003,38 @@ static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = { /* * Fetch the YFS ACL for a file. */ -int yfs_fs_store_opaque_acl2(struct afs_fs_cursor *fc, const struct afs_acl *acl, - struct afs_status_cb *scb) +void yfs_fs_store_opaque_acl2(struct afs_operation *op) { - struct afs_vnode *vnode = fc->vnode; + struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - struct afs_net *net = afs_v2net(vnode); + struct afs_acl *acl = op->acl; size_t size; __be32 *bp; _enter(",%x,{%llx:%llu},,", - key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode); + key_serial(op->key), vp->fid.vid, vp->fid.vnode); size = round_up(acl->size, 4); - call = afs_alloc_flat_call(net, &yfs_RXYFSStoreOpaqueACL2, + call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreOpaqueACL2, sizeof(__be32) * 2 + sizeof(struct yfs_xdr_YFSFid) + sizeof(__be32) + size, sizeof(struct yfs_xdr_YFSFetchStatus) + sizeof(struct yfs_xdr_YFSVolSync)); - if (!call) { - fc->ac.error = -ENOMEM; - return -ENOMEM; - } - - call->key = fc->key; - call->out_scb = scb; - call->out_volsync = NULL; + if (!call) + return afs_op_nomem(op); /* marshall the parameters */ bp = call->request; bp = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2); bp = xdr_encode_u32(bp, 0); /* RPC flags */ - bp = xdr_encode_YFSFid(bp, &vnode->fid); + bp = xdr_encode_YFSFid(bp, &vp->fid); bp = xdr_encode_u32(bp, acl->size); memcpy(bp, acl->data, acl->size); if (acl->size != size) memset((void *)bp + acl->size, 0, size - acl->size); yfs_check_req(call, bp); - trace_afs_make_fs_call(call, &vnode->fid); - afs_make_call(&fc->ac, call, GFP_KERNEL); - return afs_wait_for_call_to_complete(call, &fc->ac); + trace_afs_make_fs_call(call, &vp->fid); + afs_make_op_call(op, call, GFP_KERNEL); } diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index afffb75..40ec5c7 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4865,21 +4865,22 @@ static int ext4_inode_blocks_set(handle_t *handle, return 0; } -struct other_inode { - unsigned long orig_ino; - struct ext4_inode *raw_inode; -}; - -static int other_inode_match(struct inode * inode, unsigned long ino, - void *data) +static void __ext4_update_other_inode_time(struct super_block *sb, + unsigned long orig_ino, + unsigned long ino, + struct ext4_inode *raw_inode) { - struct other_inode *oi = (struct other_inode *) data; + struct inode *inode; + + inode = find_inode_by_ino_rcu(sb, ino); + if (!inode) + return; - if ((inode->i_ino != ino) || - (inode->i_state & (I_FREEING | I_WILL_FREE | I_NEW | + if ((inode->i_state & (I_FREEING | I_WILL_FREE | I_NEW | I_DIRTY_INODE)) || ((inode->i_state & I_DIRTY_TIME) == 0)) - return 0; + return; + spin_lock(&inode->i_lock); if (((inode->i_state & (I_FREEING | I_WILL_FREE | I_NEW | I_DIRTY_INODE)) == 0) && @@ -4890,16 +4891,15 @@ static int other_inode_match(struct inode * inode, unsigned long ino, spin_unlock(&inode->i_lock); spin_lock(&ei->i_raw_lock); - EXT4_INODE_SET_XTIME(i_ctime, inode, oi->raw_inode); - EXT4_INODE_SET_XTIME(i_mtime, inode, oi->raw_inode); - EXT4_INODE_SET_XTIME(i_atime, inode, oi->raw_inode); - ext4_inode_csum_set(inode, oi->raw_inode, ei); + EXT4_INODE_SET_XTIME(i_ctime, inode, raw_inode); + EXT4_INODE_SET_XTIME(i_mtime, inode, raw_inode); + EXT4_INODE_SET_XTIME(i_atime, inode, raw_inode); + ext4_inode_csum_set(inode, raw_inode, ei); spin_unlock(&ei->i_raw_lock); - trace_ext4_other_inode_update_time(inode, oi->orig_ino); - return -1; + trace_ext4_other_inode_update_time(inode, orig_ino); + return; } spin_unlock(&inode->i_lock); - return -1; } /* @@ -4909,24 +4909,24 @@ static int other_inode_match(struct inode * inode, unsigned long ino, static void ext4_update_other_inodes_time(struct super_block *sb, unsigned long orig_ino, char *buf) { - struct other_inode oi; unsigned long ino; int i, inodes_per_block = EXT4_SB(sb)->s_inodes_per_block; int inode_size = EXT4_INODE_SIZE(sb); - oi.orig_ino = orig_ino; /* * Calculate the first inode in the inode table block. Inode * numbers are one-based. That is, the first inode in a block * (assuming 4k blocks and 256 byte inodes) is (n*16 + 1). */ ino = ((orig_ino - 1) & ~(inodes_per_block - 1)) + 1; + rcu_read_lock(); for (i = 0; i < inodes_per_block; i++, ino++, buf += inode_size) { if (ino == orig_ino) continue; - oi.raw_inode = (struct ext4_inode *) buf; - (void) find_inode_nowait(sb, ino, other_inode_match, &oi); + __ext4_update_other_inode_time(sb, orig_ino, ino, + (struct ext4_inode *)buf); } + rcu_read_unlock(); } /* diff --git a/fs/inode.c b/fs/inode.c index 9fcec07..72c4c34 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -497,7 +497,7 @@ void __insert_inode_hash(struct inode *inode, unsigned long hashval) spin_lock(&inode_hash_lock); spin_lock(&inode->i_lock); - hlist_add_head(&inode->i_hash, b); + hlist_add_head_rcu(&inode->i_hash, b); spin_unlock(&inode->i_lock); spin_unlock(&inode_hash_lock); } @@ -513,7 +513,7 @@ void __remove_inode_hash(struct inode *inode) { spin_lock(&inode_hash_lock); spin_lock(&inode->i_lock); - hlist_del_init(&inode->i_hash); + hlist_del_init_rcu(&inode->i_hash); spin_unlock(&inode->i_lock); spin_unlock(&inode_hash_lock); } @@ -1107,7 +1107,7 @@ again: */ spin_lock(&inode->i_lock); inode->i_state |= I_NEW; - hlist_add_head(&inode->i_hash, head); + hlist_add_head_rcu(&inode->i_hash, head); spin_unlock(&inode->i_lock); if (!creating) inode_sb_list_add(inode); @@ -1201,7 +1201,7 @@ again: inode->i_ino = ino; spin_lock(&inode->i_lock); inode->i_state = I_NEW; - hlist_add_head(&inode->i_hash, head); + hlist_add_head_rcu(&inode->i_hash, head); spin_unlock(&inode->i_lock); inode_sb_list_add(inode); spin_unlock(&inode_hash_lock); @@ -1244,15 +1244,10 @@ static int test_inode_iunique(struct super_block *sb, unsigned long ino) struct hlist_head *b = inode_hashtable + hash(sb, ino); struct inode *inode; - spin_lock(&inode_hash_lock); - hlist_for_each_entry(inode, b, i_hash) { - if (inode->i_ino == ino && inode->i_sb == sb) { - spin_unlock(&inode_hash_lock); + hlist_for_each_entry_rcu(inode, b, i_hash) { + if (inode->i_ino == ino && inode->i_sb == sb) return 0; - } } - spin_unlock(&inode_hash_lock); - return 1; } @@ -1281,6 +1276,7 @@ ino_t iunique(struct super_block *sb, ino_t max_reserved) static unsigned int counter; ino_t res; + rcu_read_lock(); spin_lock(&iunique_lock); do { if (counter <= max_reserved) @@ -1288,6 +1284,7 @@ ino_t iunique(struct super_block *sb, ino_t max_reserved) res = counter++; } while (!test_inode_iunique(sb, res)); spin_unlock(&iunique_lock); + rcu_read_unlock(); return res; } @@ -1456,6 +1453,84 @@ out: } EXPORT_SYMBOL(find_inode_nowait); +/** + * find_inode_rcu - find an inode in the inode cache + * @sb: Super block of file system to search + * @hashval: Key to hash + * @test: Function to test match on an inode + * @data: Data for test function + * + * Search for the inode specified by @hashval and @data in the inode cache, + * where the helper function @test will return 0 if the inode does not match + * and 1 if it does. The @test function must be responsible for taking the + * i_lock spin_lock and checking i_state for an inode being freed or being + * initialized. + * + * If successful, this will return the inode for which the @test function + * returned 1 and NULL otherwise. + * + * The @test function is not permitted to take a ref on any inode presented. + * It is also not permitted to sleep. + * + * The caller must hold the RCU read lock. + */ +struct inode *find_inode_rcu(struct super_block *sb, unsigned long hashval, + int (*test)(struct inode *, void *), void *data) +{ + struct hlist_head *head = inode_hashtable + hash(sb, hashval); + struct inode *inode; + + RCU_LOCKDEP_WARN(!rcu_read_lock_held(), + "suspicious find_inode_rcu() usage"); + + hlist_for_each_entry_rcu(inode, head, i_hash) { + if (inode->i_sb == sb && + !(READ_ONCE(inode->i_state) & (I_FREEING | I_WILL_FREE)) && + test(inode, data)) + return inode; + } + return NULL; +} +EXPORT_SYMBOL(find_inode_rcu); + +/** + * find_inode_by_rcu - Find an inode in the inode cache + * @sb: Super block of file system to search + * @ino: The inode number to match + * + * Search for the inode specified by @hashval and @data in the inode cache, + * where the helper function @test will return 0 if the inode does not match + * and 1 if it does. The @test function must be responsible for taking the + * i_lock spin_lock and checking i_state for an inode being freed or being + * initialized. + * + * If successful, this will return the inode for which the @test function + * returned 1 and NULL otherwise. + * + * The @test function is not permitted to take a ref on any inode presented. + * It is also not permitted to sleep. + * + * The caller must hold the RCU read lock. + */ +struct inode *find_inode_by_ino_rcu(struct super_block *sb, + unsigned long ino) +{ + struct hlist_head *head = inode_hashtable + hash(sb, ino); + struct inode *inode; + + RCU_LOCKDEP_WARN(!rcu_read_lock_held(), + "suspicious find_inode_by_ino_rcu() usage"); + + hlist_for_each_entry_rcu(inode, head, i_hash) { + if (inode->i_ino == ino && + inode->i_sb == sb && + !(READ_ONCE(inode->i_state) & (I_FREEING | I_WILL_FREE))) + return inode; + } + return NULL; +} +EXPORT_SYMBOL(find_inode_by_ino_rcu); + int insert_inode_locked(struct inode *inode) { struct super_block *sb = inode->i_sb; @@ -1480,7 +1555,7 @@ int insert_inode_locked(struct inode *inode) if (likely(!old)) { spin_lock(&inode->i_lock); inode->i_state |= I_NEW | I_CREATING; - hlist_add_head(&inode->i_hash, head); + hlist_add_head_rcu(&inode->i_hash, head); spin_unlock(&inode->i_lock); spin_unlock(&inode_hash_lock); return 0; @@ -1540,6 +1615,7 @@ static void iput_final(struct inode *inode) { struct super_block *sb = inode->i_sb; const struct super_operations *op = inode->i_sb->s_op; + unsigned long state; int drop; WARN_ON(inode->i_state & I_NEW); @@ -1555,16 +1631,20 @@ static void iput_final(struct inode *inode) return; } + state = inode->i_state; if (!drop) { - inode->i_state |= I_WILL_FREE; + WRITE_ONCE(inode->i_state, state | I_WILL_FREE); spin_unlock(&inode->i_lock); + write_inode_now(inode, 1); + spin_lock(&inode->i_lock); - WARN_ON(inode->i_state & I_NEW); - inode->i_state &= ~I_WILL_FREE; + state = inode->i_state; + WARN_ON(state & I_NEW); + state &= ~I_WILL_FREE; } - inode->i_state |= I_FREEING; + WRITE_ONCE(inode->i_state, state | I_FREEING); if (!list_empty(&inode->i_lru)) inode_lru_list_del(inode); spin_unlock(&inode->i_lock); diff --git a/include/linux/fs.h b/include/linux/fs.h index bb0acc7..01f5d29 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -3081,6 +3081,9 @@ extern struct inode *find_inode_nowait(struct super_block *, int (*match)(struct inode *, unsigned long, void *), void *data); +extern struct inode *find_inode_rcu(struct super_block *, unsigned long, + int (*)(struct inode *, void *), void *); +extern struct inode *find_inode_by_ino_rcu(struct super_block *, unsigned long); extern int insert_inode_locked4(struct inode *, unsigned long, int (*test)(struct inode *, void *), void *); extern int insert_inode_locked(struct inode *); #ifdef CONFIG_DEBUG_LOCK_ALLOC diff --git a/include/trace/events/afs.h b/include/trace/events/afs.h index c612cab..5f0c1cf 100644 --- a/include/trace/events/afs.h +++ b/include/trace/events/afs.h @@ -33,20 +33,40 @@ enum afs_server_trace { afs_server_trace_destroy, afs_server_trace_free, afs_server_trace_gc, + afs_server_trace_get_by_addr, afs_server_trace_get_by_uuid, afs_server_trace_get_caps, afs_server_trace_get_install, afs_server_trace_get_new_cbi, + afs_server_trace_get_probe, afs_server_trace_give_up_cb, afs_server_trace_put_call, afs_server_trace_put_cbi, afs_server_trace_put_find_rsq, + afs_server_trace_put_probe, afs_server_trace_put_slist, afs_server_trace_put_slist_isort, afs_server_trace_put_uuid_rsq, afs_server_trace_update, }; +enum afs_volume_trace { + afs_volume_trace_alloc, + afs_volume_trace_free, + afs_volume_trace_get_alloc_sbi, + afs_volume_trace_get_cell_insert, + afs_volume_trace_get_new_op, + afs_volume_trace_get_query_alias, + afs_volume_trace_put_cell_dup, + afs_volume_trace_put_cell_root, + afs_volume_trace_put_destroy_sbi, + afs_volume_trace_put_free_fc, + afs_volume_trace_put_put_op, + afs_volume_trace_put_query_alias, + afs_volume_trace_put_validate_fc, + afs_volume_trace_remove, +}; + enum afs_fs_operation { afs_FS_FetchData = 130, /* AFS Fetch file data */ afs_FS_FetchACL = 131, /* AFS Fetch file ACL */ @@ -108,6 +128,7 @@ enum afs_vl_operation { afs_VL_GetEntryByNameU = 527, /* AFS Get Vol Entry By Name operation ID */ afs_VL_GetAddrsU = 533, /* AFS Get FS server addresses */ afs_YFSVL_GetEndpoints = 64002, /* YFS Get FS & Vol server addresses */ + afs_YFSVL_GetCellName = 64014, /* YFS Get actual cell name */ afs_VL_GetCapabilities = 65537, /* AFS Get VL server capabilities */ }; @@ -140,6 +161,7 @@ enum afs_eproto_cause { afs_eproto_bad_status, afs_eproto_cb_count, afs_eproto_cb_fid_count, + afs_eproto_cellname_len, afs_eproto_file_type, afs_eproto_ibulkst_cb_count, afs_eproto_ibulkst_count, @@ -241,19 +263,38 @@ enum afs_cb_break_reason { EM(afs_server_trace_destroy, "DESTROY ") \ EM(afs_server_trace_free, "FREE ") \ EM(afs_server_trace_gc, "GC ") \ + EM(afs_server_trace_get_by_addr, "GET addr ") \ EM(afs_server_trace_get_by_uuid, "GET uuid ") \ EM(afs_server_trace_get_caps, "GET caps ") \ EM(afs_server_trace_get_install, "GET inst ") \ EM(afs_server_trace_get_new_cbi, "GET cbi ") \ + EM(afs_server_trace_get_probe, "GET probe") \ EM(afs_server_trace_give_up_cb, "giveup-cb") \ EM(afs_server_trace_put_call, "PUT call ") \ EM(afs_server_trace_put_cbi, "PUT cbi ") \ EM(afs_server_trace_put_find_rsq, "PUT f-rsq") \ + EM(afs_server_trace_put_probe, "PUT probe") \ EM(afs_server_trace_put_slist, "PUT slist") \ EM(afs_server_trace_put_slist_isort, "PUT isort") \ EM(afs_server_trace_put_uuid_rsq, "PUT u-req") \ E_(afs_server_trace_update, "UPDATE") +#define afs_volume_traces \ + EM(afs_volume_trace_alloc, "ALLOC ") \ + EM(afs_volume_trace_free, "FREE ") \ + EM(afs_volume_trace_get_alloc_sbi, "GET sbi-alloc ") \ + EM(afs_volume_trace_get_cell_insert, "GET cell-insrt") \ + EM(afs_volume_trace_get_new_op, "GET op-new ") \ + EM(afs_volume_trace_get_query_alias, "GET cell-alias") \ + EM(afs_volume_trace_put_cell_dup, "PUT cell-dup ") \ + EM(afs_volume_trace_put_cell_root, "PUT cell-root ") \ + EM(afs_volume_trace_put_destroy_sbi, "PUT sbi-destry") \ + EM(afs_volume_trace_put_free_fc, "PUT fc-free ") \ + EM(afs_volume_trace_put_put_op, "PUT op-put ") \ + EM(afs_volume_trace_put_query_alias, "PUT cell-alias") \ + EM(afs_volume_trace_put_validate_fc, "PUT fc-validat") \ + E_(afs_volume_trace_remove, "REMOVE ") + #define afs_fs_operations \ EM(afs_FS_FetchData, "FS.FetchData") \ EM(afs_FS_FetchStatus, "FS.FetchStatus") \ @@ -310,6 +351,7 @@ enum afs_cb_break_reason { EM(afs_VL_GetEntryByNameU, "VL.GetEntryByNameU") \ EM(afs_VL_GetAddrsU, "VL.GetAddrsU") \ EM(afs_YFSVL_GetEndpoints, "YFSVL.GetEndpoints") \ + EM(afs_YFSVL_GetCellName, "YFSVL.GetCellName") \ E_(afs_VL_GetCapabilities, "VL.GetCapabilities") #define afs_edit_dir_ops \ @@ -339,6 +381,7 @@ enum afs_cb_break_reason { EM(afs_eproto_bad_status, "BadStatus") \ EM(afs_eproto_cb_count, "CbCount") \ EM(afs_eproto_cb_fid_count, "CbFidCount") \ + EM(afs_eproto_cellname_len, "CellNameLen") \ EM(afs_eproto_file_type, "FileTYpe") \ EM(afs_eproto_ibulkst_cb_count, "IBS.CbCount") \ EM(afs_eproto_ibulkst_count, "IBS.FidCount") \ @@ -636,7 +679,7 @@ TRACE_EVENT(afs_make_fs_calli, TRACE_EVENT(afs_make_fs_call1, TP_PROTO(struct afs_call *call, const struct afs_fid *fid, - const char *name), + const struct qstr *name), TP_ARGS(call, fid, name), @@ -648,8 +691,7 @@ TRACE_EVENT(afs_make_fs_call1, ), TP_fast_assign( - int __len = strlen(name); - __len = min(__len, 23); + unsigned int __len = min_t(unsigned int, name->len, 23); __entry->call = call->debug_id; __entry->op = call->operation_ID; if (fid) { @@ -659,7 +701,7 @@ TRACE_EVENT(afs_make_fs_call1, __entry->fid.vnode = 0; __entry->fid.unique = 0; } - memcpy(__entry->name, name, __len); + memcpy(__entry->name, name->name, __len); __entry->name[__len] = 0; ), @@ -674,7 +716,7 @@ TRACE_EVENT(afs_make_fs_call1, TRACE_EVENT(afs_make_fs_call2, TP_PROTO(struct afs_call *call, const struct afs_fid *fid, - const char *name, const char *name2), + const struct qstr *name, const struct qstr *name2), TP_ARGS(call, fid, name, name2), @@ -687,10 +729,8 @@ TRACE_EVENT(afs_make_fs_call2, ), TP_fast_assign( - int __len = strlen(name); - int __len2 = strlen(name2); - __len = min(__len, 23); - __len2 = min(__len2, 23); + unsigned int __len = min_t(unsigned int, name->len, 23); + unsigned int __len2 = min_t(unsigned int, name2->len, 23); __entry->call = call->debug_id; __entry->op = call->operation_ID; if (fid) { @@ -700,9 +740,9 @@ TRACE_EVENT(afs_make_fs_call2, __entry->fid.vnode = 0; __entry->fid.unique = 0; } - memcpy(__entry->name, name, __len); + memcpy(__entry->name, name->name, __len); __entry->name[__len] = 0; - memcpy(__entry->name2, name2, __len2); + memcpy(__entry->name2, name2->name, __len2); __entry->name2[__len2] = 0; ), @@ -988,24 +1028,22 @@ TRACE_EVENT(afs_edit_dir, ); TRACE_EVENT(afs_protocol_error, - TP_PROTO(struct afs_call *call, int error, enum afs_eproto_cause cause), + TP_PROTO(struct afs_call *call, enum afs_eproto_cause cause), - TP_ARGS(call, error, cause), + TP_ARGS(call, cause), TP_STRUCT__entry( __field(unsigned int, call ) - __field(int, error ) __field(enum afs_eproto_cause, cause ) ), TP_fast_assign( __entry->call = call ? call->debug_id : 0; - __entry->error = error; __entry->cause = cause; ), - TP_printk("c=%08x r=%d %s", - __entry->call, __entry->error, + TP_printk("c=%08x %s", + __entry->call, __print_symbolic(__entry->cause, afs_eproto_causes)) ); @@ -1271,26 +1309,53 @@ TRACE_EVENT(afs_cb_miss, ); TRACE_EVENT(afs_server, - TP_PROTO(struct afs_server *server, int usage, enum afs_server_trace reason), + TP_PROTO(struct afs_server *server, int ref, int active, + enum afs_server_trace reason), - TP_ARGS(server, usage, reason), + TP_ARGS(server, ref, active, reason), TP_STRUCT__entry( __field(unsigned int, server ) - __field(int, usage ) + __field(int, ref ) + __field(int, active ) __field(int, reason ) ), TP_fast_assign( __entry->server = server->debug_id; - __entry->usage = usage; + __entry->ref = ref; + __entry->active = active; __entry->reason = reason; ), - TP_printk("s=%08x %s u=%d", + TP_printk("s=%08x %s u=%d a=%d", __entry->server, __print_symbolic(__entry->reason, afs_server_traces), - __entry->usage) + __entry->ref, + __entry->active) + ); + +TRACE_EVENT(afs_volume, + TP_PROTO(afs_volid_t vid, int ref, enum afs_volume_trace reason), + + TP_ARGS(vid, ref, reason), + + TP_STRUCT__entry( + __field(afs_volid_t, vid ) + __field(int, ref ) + __field(enum afs_volume_trace, reason ) + ), + + TP_fast_assign( + __entry->vid = vid; + __entry->ref = ref; + __entry->reason = reason; + ), + + TP_printk("V=%llx %s u=%d", + __entry->vid, + __print_symbolic(__entry->reason, afs_volume_traces), + __entry->ref) ); #endif /* _TRACE_AFS_H */ diff --git a/net/rxrpc/peer_event.c b/net/rxrpc/peer_event.c index b1449d9..112e490 100644 --- a/net/rxrpc/peer_event.c +++ b/net/rxrpc/peer_event.c @@ -271,6 +271,9 @@ static void rxrpc_store_error(struct rxrpc_peer *peer, break; case SO_EE_ORIGIN_ICMP6: + if (err == EACCES) + err = EHOSTUNREACH; + /* Fall through */ default: _proto("Rx Received error report { orig=%u }", ee->ee_origin); break; diff --git a/net/rxrpc/proc.c b/net/rxrpc/proc.c index 8b179e3..543afd9 100644 --- a/net/rxrpc/proc.c +++ b/net/rxrpc/proc.c @@ -68,7 +68,7 @@ static int rxrpc_call_seq_show(struct seq_file *seq, void *v) "Proto Local " " Remote " " SvID ConnID CallID End Use State Abort " - " UserID TxSeq TW RxSeq RW RxSerial RxTimo\n"); + " DebugId TxSeq TW RxSeq RW RxSerial RxTimo\n"); return 0; } @@ -100,7 +100,7 @@ static int rxrpc_call_seq_show(struct seq_file *seq, void *v) rx_hard_ack = READ_ONCE(call->rx_hard_ack); seq_printf(seq, "UDP %-47.47s %-47.47s %4x %08x %08x %s %3u" - " %-8.8s %08x %lx %08x %02x %08x %02x %08x %06lx\n", + " %-8.8s %08x %08x %08x %02x %08x %02x %08x %06lx\n", lbuff, rbuff, call->service_id, @@ -110,7 +110,7 @@ static int rxrpc_call_seq_show(struct seq_file *seq, void *v) atomic_read(&call->usage), rxrpc_call_states[call->state], call->abort_code, - call->user_call_ID, + call->debug_id, tx_hard_ack, READ_ONCE(call->tx_top) - tx_hard_ack, rx_hard_ack, READ_ONCE(call->rx_top) - rx_hard_ack, call->rx_serial,