Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6
Merge commit. Changes below are compared with the first parent: e55fdbd7.
Changes
13 files changed · +455 −381
| File | Status | Add | Del | Content |
|---|---|---|---|---|
| fs/cifs/cifs_debug.c | modified | +5 | −5 | View file |
| fs/cifs/cifsacl.c | modified | +11 | −2 | View file |
| fs/cifs/cifsfs.c | modified | +5 | −1 | View file |
| fs/cifs/cifsfs.h | modified | +1 | −1 | View file |
| fs/cifs/cifsglob.h | modified | +21 | −7 | View file |
| fs/cifs/cifspdu.h | modified | +15 | −0 | View file |
| fs/cifs/cifsproto.h | modified | +8 | −1 | View file |
| fs/cifs/cifssmb.c | modified | +54 | −5 | View file |
| fs/cifs/connect.c | modified | +75 | −74 | View file |
| fs/cifs/file.c | modified | +55 | −59 | View file |
| fs/cifs/misc.c | modified | +1 | −1 | View file |
| fs/cifs/sess.c | modified | +1 | −1 | View file |
| fs/cifs/transport.c | modified | +203 | −224 | View file |
Only the first 600 diff lines are shown. Download the complete patch.
fs/cifs/cifs_debug.c
View filediff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index ede9830..65829d3 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -79,11 +79,11 @@ void cifs_dump_mids(struct TCP_Server_Info *server)
spin_lock(&GlobalMid_Lock);
list_for_each(tmp, &server->pending_mid_q) {
mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
- cERROR(1, "State: %d Cmd: %d Pid: %d Tsk: %p Mid %d",
+ cERROR(1, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %d",
mid_entry->midState,
(int)mid_entry->command,
mid_entry->pid,
- mid_entry->tsk,
+ mid_entry->callback_data,
mid_entry->mid);
#ifdef CONFIG_CIFS_STATS2
cERROR(1, "IsLarge: %d buf: %p time rcv: %ld now: %ld",
@@ -218,11 +218,11 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
mid_entry = list_entry(tmp3, struct mid_q_entry,
qhead);
seq_printf(m, "\tState: %d com: %d pid:"
- " %d tsk: %p mid %d\n",
+ " %d cbdata: %p mid %d\n",
mid_entry->midState,
(int)mid_entry->command,
mid_entry->pid,
- mid_entry->tsk,
+ mid_entry->callback_data,
mid_entry->mid);
}
spin_unlock(&GlobalMid_Lock);
@@ -331,7 +331,7 @@ static int cifs_stats_proc_show(struct seq_file *m, void *v)
atomic_read(&totSmBufAllocCount));
#endif /* CONFIG_CIFS_STATS2 */
- seq_printf(m, "Operations (MIDs): %d\n", midCount.counter);
+ seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
seq_printf(m,
"\n%d session %d share reconnects\n",
tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
fs/cifs/cifsacl.c
View filediff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index a437ec3..1e7636b 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -41,9 +41,12 @@ static struct cifs_wksid wksidarr[NUM_WK_SIDS] = {
;
-/* security id for everyone */
+/* security id for everyone/world system group */
static const struct cifs_sid sid_everyone = {
1, 1, {0, 0, 0, 0, 0, 1}, {0} };
+/* security id for Authenticated Users system group */
+static const struct cifs_sid sid_authusers = {
+ 1, 1, {0, 0, 0, 0, 0, 5}, {11} };
/* group users */
static const struct cifs_sid sid_user = {1, 2 , {0, 0, 0, 0, 0, 5}, {} };
@@ -365,7 +368,7 @@ static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl,
if (num_aces > 0) {
umode_t user_mask = S_IRWXU;
umode_t group_mask = S_IRWXG;
- umode_t other_mask = S_IRWXO;
+ umode_t other_mask = S_IRWXU | S_IRWXG | S_IRWXO;
ppace = kmalloc(num_aces * sizeof(struct cifs_ace *),
GFP_KERNEL);
@@ -390,6 +393,12 @@ static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl,
ppace[i]->type,
&fattr->cf_mode,
&other_mask);
+ if (compare_sids(&(ppace[i]->sid), &sid_authusers))
+ access_flags_to_mode(ppace[i]->access_req,
+ ppace[i]->type,
+ &fattr->cf_mode,
+ &other_mask);
+
/* memcpy((void *)(&(cifscred->aces[i])),
(void *)ppace[i],
fs/cifs/cifsfs.c
View filediff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index d9f652a..99d777a 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -77,7 +77,11 @@ unsigned int cifs_max_pending = CIFS_MAX_REQ;
module_param(cifs_max_pending, int, 0);
MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
"Default: 50 Range: 2 to 256");
-
+unsigned short echo_retries = 5;
+module_param(echo_retries, ushort, 0644);
+MODULE_PARM_DESC(echo_retries, "Number of echo attempts before giving up and "
+ "reconnecting server. Default: 5. 0 means "
+ "never reconnect.");
extern mempool_t *cifs_sm_req_poolp;
extern mempool_t *cifs_req_poolp;
extern mempool_t *cifs_mid_poolp;
fs/cifs/cifsfs.h
View filediff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 851030f..4739a53 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -118,5 +118,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
extern const struct export_operations cifs_export_ops;
#endif /* EXPERIMENTAL */
-#define CIFS_VERSION "1.68"
+#define CIFS_VERSION "1.69"
#endif /* _CIFSFS_H */
fs/cifs/cifsglob.h
View filediff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 606ca8b..571132c 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -218,6 +218,7 @@ struct TCP_Server_Info {
bool sec_kerberosu2u; /* supports U2U Kerberos */
bool sec_ntlmssp; /* supports NTLMSSP */
bool session_estab; /* mark when very first sess is established */
+ struct delayed_work echo; /* echo ping workqueue job */
#ifdef CONFIG_CIFS_FSCACHE
struct fscache_cookie *fscache; /* client index cache cookie */
#endif
@@ -508,6 +509,18 @@ static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
#endif
+struct mid_q_entry;
+
+/*
+ * This is the prototype for the mid callback function. When creating one,
+ * take special care to avoid deadlocks. Things to bear in mind:
+ *
+ * - it will be called by cifsd
+ * - the GlobalMid_Lock will be held
+ * - the mid will be removed from the pending_mid_q list
+ */
+typedef void (mid_callback_t)(struct mid_q_entry *mid);
+
/* one of these for every pending CIFS request to the server */
struct mid_q_entry {
struct list_head qhead; /* mids waiting on reply from this server */
@@ -519,7 +532,8 @@ struct mid_q_entry {
unsigned long when_sent; /* time when smb send finished */
unsigned long when_received; /* when demux complete (taken off wire) */
#endif
- struct task_struct *tsk; /* task waiting for response */
+ mid_callback_t *callback; /* call completion callback */
+ void *callback_data; /* general purpose pointer for callback */
struct smb_hdr *resp_buf; /* response buffer */
int midState; /* wish this were enum but can not pass to wait_event */
__u8 command; /* smb command code */
@@ -622,12 +636,9 @@ static inline void free_dfs_info_array(struct dfs_info3_param *param,
#define CIFS_IOVEC 4 /* array of response buffers */
/* Type of Request to SendReceive2 */
-#define CIFS_STD_OP 0 /* normal request timeout */
-#define CIFS_LONG_OP 1 /* long op (up to 45 sec, oplock time) */
-#define CIFS_VLONG_OP 2 /* sloow op - can take up to 180 seconds */
-#define CIFS_BLOCKING_OP 4 /* operation can block */
-#define CIFS_ASYNC_OP 8 /* do not wait for response */
-#define CIFS_TIMEOUT_MASK 0x00F /* only one of 5 above set in req */
+#define CIFS_BLOCKING_OP 1 /* operation can block */
+#define CIFS_ASYNC_OP 2 /* do not wait for response */
+#define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
#define CIFS_NO_RESP 0x040 /* no response buffer required */
@@ -790,6 +801,9 @@ GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
+/* reconnect after this many failed echo attempts */
+GLOBAL_EXTERN unsigned short echo_retries;
+
void cifs_oplock_break(struct work_struct *work);
void cifs_oplock_break_get(struct cifsFileInfo *cfile);
void cifs_oplock_break_put(struct cifsFileInfo *cfile);
fs/cifs/cifspdu.h
View filediff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index de36b09..ea205b4 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -50,6 +50,7 @@
#define SMB_COM_SETATTR 0x09 /* trivial response */
#define SMB_COM_LOCKING_ANDX 0x24 /* trivial response */
#define SMB_COM_COPY 0x29 /* trivial rsp, fail filename ignrd*/
+#define SMB_COM_ECHO 0x2B /* echo request */
#define SMB_COM_OPEN_ANDX 0x2D /* Legacy open for old servers */
#define SMB_COM_READ_ANDX 0x2E
#define SMB_COM_WRITE_ANDX 0x2F
@@ -760,6 +761,20 @@ typedef struct smb_com_tconx_rsp_ext {
*
*/
+typedef struct smb_com_echo_req {
+ struct smb_hdr hdr;
+ __le16 EchoCount;
+ __le16 ByteCount;
+ char Data[1];
+} __attribute__((packed)) ECHO_REQ;
+
+typedef struct smb_com_echo_rsp {
+ struct smb_hdr hdr;
+ __le16 SequenceNumber;
+ __le16 ByteCount;
+ char Data[1];
+} __attribute__((packed)) ECHO_RSP;
+
typedef struct smb_com_logoff_andx_req {
struct smb_hdr hdr; /* wct = 2 */
__u8 AndXCommand;
fs/cifs/cifsproto.h
View filediff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index e6d1481..982895f 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -61,6 +61,12 @@ extern char *cifs_compose_mount_options(const char *sb_mountdata,
const char *fullpath, const struct dfs_info3_param *ref,
char **devname);
/* extern void renew_parental_timestamps(struct dentry *direntry);*/
+extern struct mid_q_entry *AllocMidQEntry(const struct smb_hdr *smb_buffer,
+ struct TCP_Server_Info *server);
+extern void DeleteMidQEntry(struct mid_q_entry *midEntry);
+extern int cifs_call_async(struct TCP_Server_Info *server,
+ struct smb_hdr *in_buf, mid_callback_t *callback,
+ void *cbdata);
extern int SendReceive(const unsigned int /* xid */ , struct cifsSesInfo *,
struct smb_hdr * /* input */ ,
struct smb_hdr * /* out */ ,
@@ -347,12 +353,13 @@ extern int CIFSSMBLock(const int xid, struct cifsTconInfo *tcon,
const __u16 netfid, const __u64 len,
const __u64 offset, const __u32 numUnlock,
const __u32 numLock, const __u8 lockType,
- const bool waitFlag);
+ const bool waitFlag, const __u8 oplock_level);
extern int CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
const __u16 smb_file_id, const int get_flag,
const __u64 len, struct file_lock *,
const __u16 lock_type, const bool waitFlag);
extern int CIFSSMBTDis(const int xid, struct cifsTconInfo *tcon);
+extern int CIFSSMBEcho(struct TCP_Server_Info *server);
extern int CIFSSMBLogoff(const int xid, struct cifsSesInfo *ses);
extern struct cifsSesInfo *sesInfoAlloc(void);
fs/cifs/cifssmb.c
View filediff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 2f6795e..3711345 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -706,6 +706,53 @@ CIFSSMBTDis(const int xid, struct cifsTconInfo *tcon)
return rc;
}
+/*
+ * This is a no-op for now. We're not really interested in the reply, but
+ * rather in the fact that the server sent one and that server->lstrp
+ * gets updated.
+ *
+ * FIXME: maybe we should consider checking that the reply matches request?
+ */
+static void
+cifs_echo_callback(struct mid_q_entry *mid)
+{
+ struct TCP_Server_Info *server = mid->callback_data;
+
+ DeleteMidQEntry(mid);
+ atomic_dec(&server->inFlight);
+ wake_up(&server->request_q);
+}
+
+int
+CIFSSMBEcho(struct TCP_Server_Info *server)
+{
+ ECHO_REQ *smb;
+ int rc = 0;
+
+ cFYI(1, "In echo request");
+
+ rc = small_smb_init(SMB_COM_ECHO, 0, NULL, (void **)&smb);
+ if (rc)
+ return rc;
+
+ /* set up echo request */
+ smb->hdr.Tid = cpu_to_le16(0xffff);
+ smb->hdr.WordCount = cpu_to_le16(1);
+ smb->EchoCount = cpu_to_le16(1);
+ smb->ByteCount = cpu_to_le16(1);
+ smb->Data[0] = 'a';
+ smb->hdr.smb_buf_length += 3;
+
+ rc = cifs_call_async(server, (struct smb_hdr *)smb,
+ cifs_echo_callback, server);
+ if (rc)
+ cFYI(1, "Echo request failed: %d", rc);
+
+ cifs_small_buf_release(smb);
+
+ return rc;
+}
+
int
CIFSSMBLogoff(const int xid, struct cifsSesInfo *ses)
{
@@ -1193,7 +1240,7 @@ OldOpenRetry:
pSMB->ByteCount = cpu_to_le16(count);
/* long_op set to 1 to allow for oplock break timeouts */
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
- (struct smb_hdr *)pSMBr, &bytes_returned, CIFS_LONG_OP);
+ (struct smb_hdr *)pSMBr, &bytes_returned, 0);
cifs_stats_inc(&tcon->num_opens);
if (rc) {
cFYI(1, "Error in Open = %d", rc);
@@ -1306,7 +1353,7 @@ openRetry:
pSMB->ByteCount = cpu_to_le16(count);
/* long_op set to 1 to allow for oplock break timeouts */
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
- (struct smb_hdr *)pSMBr, &bytes_returned, CIFS_LONG_OP);
+ (struct smb_hdr *)pSMBr, &bytes_returned, 0);
cifs_stats_inc(&tcon->num_opens);
if (rc) {
cFYI(1, "Error in Open = %d", rc);
@@ -1388,7 +1435,7 @@ CIFSSMBRead(const int xid, struct cifsTconInfo *tcon, const int netfid,
iov[0].iov_base = (char *)pSMB;
iov[0].iov_len = pSMB->hdr.smb_buf_length + 4;
rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovecs */,
- &resp_buf_type, CIFS_STD_OP | CIFS_LOG_ERROR);
+ &resp_buf_type, CIFS_LOG_ERROR);
cifs_stats_inc(&tcon->num_reads);
pSMBr = (READ_RSP *)iov[0].iov_base;
if (rc) {
@@ -1663,7 +1710,8 @@ int
CIFSSMBLock(const int xid, struct cifsTconInfo *tcon,
const __u16 smb_file_id, const __u64 len,
const __u64 offset, const __u32 numUnlock,
- const __u32 numLock, const __u8 lockType, const bool waitFlag)
+ const __u32 numLock, const __u8 lockType,
+ const bool waitFlag, const __u8 oplock_level)
{
int rc = 0;
LOCK_REQ *pSMB = NULL;
@@ -1691,6 +1739,7 @@ CIFSSMBLock(const int xid, struct cifsTconInfo *tcon,
pSMB->NumberOfLocks = cpu_to_le16(numLock);
pSMB->NumberOfUnlocks = cpu_to_le16(numUnlock);
pSMB->LockType = lockType;
+ pSMB->OplockLevel = oplock_level;
pSMB->AndXCommand = 0xFF; /* none */
pSMB->Fid = smb_file_id; /* netfid stays le */
@@ -3087,7 +3136,7 @@ CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
iov[0].iov_len = pSMB->hdr.smb_buf_length + 4;
rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovec */, &buf_type,
- CIFS_STD_OP);
+ 0);
cifs_stats_inc(&tcon->num_acl_get);
if (rc) {
cFYI(1, "Send error in QuerySecDesc = %d", rc);
fs/cifs/connect.c
View filediff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 9f59887..8d46575 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -52,6 +52,9 @@
#define CIFS_PORT 445
#define RFC1001_PORT 139
+/* SMB echo "timeout" -- FIXME: tunable? */
+#define SMB_ECHO_INTERVAL (60 * HZ)
+
extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
unsigned char *p24);
@@ -152,6 +155,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
/* before reconnecting the tcp session, mark the smb session (uid)
and the tid bad so they are not used until reconnected */
+ cFYI(1, "%s: marking sessions and tcons for reconnect", __func__);
spin_lock(&cifs_tcp_ses_lock);
list_for_each(tmp, &server->smb_ses_list) {
ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
@@ -163,7 +167,9 @@ cifs_reconnect(struct TCP_Server_Info *server)
}
}
spin_unlock(&cifs_tcp_ses_lock);
+
/* do not want to be sending data on a socket we are freeing */
+ cFYI(1, "%s: tearing down socket", __func__);
mutex_lock(&server->srv_mutex);
if (server->ssocket) {
cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state,
@@ -180,22 +186,20 @@ cifs_reconnect(struct TCP_Server_Info *server)
kfree(server->session_key.response);
server->session_key.response = NULL;
server->session_key.len = 0;
+ server->lstrp = jiffies;
+ mutex_unlock(&server->srv_mutex);
+ /* mark submitted MIDs for retry and issue callback */
+ cFYI(1, "%s: issuing mid callbacks", __func__);
spin_lock(&GlobalMid_Lock);
- list_for_each(tmp, &server->pending_mid_q) {
- mid_entry = list_entry(tmp, struct
- mid_q_entry,
- qhead);
- if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
- /* Mark other intransit requests as needing
- retry so we do not immediately mark the
- session bad again (ie after we reconnect
- below) as they timeout too */
+ list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
+ mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
+ if (mid_entry->midState == MID_REQUEST_SUBMITTED)
mid_entry->midState = MID_RETRY_NEEDED;
- }
+ list_del_init(&mid_entry->qhead);
+ mid_entry->callback(mid_entry);
}
spin_unlock(&GlobalMid_Lock);
- mutex_unlock(&server->srv_mutex);
while ((server->tcpStatus != CifsExiting) &&
(server->tcpStatus != CifsGood)) {
@@ -212,10 +216,9 @@ cifs_reconnect(struct TCP_Server_Info *server)
if (server->tcpStatus != CifsExiting)
server->tcpStatus = CifsGood;
spin_unlock(&GlobalMid_Lock);
- /* atomic_set(&server->inFlight,0);*/
- wake_up(&server->response_q);
}
}
+
return rc;
}
@@ -334,6 +337,26 @@ static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
}
+static void
+cifs_echo_request(struct work_struct *work)
+{
+ int rc;
+ struct TCP_Server_Info *server = container_of(work,
+ struct TCP_Server_Info, echo.work);
+
+ /* no need to ping if we got a response recently */
+ if (time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
+ goto requeue_echo;
+
+ rc = CIFSSMBEcho(server);
+ if (rc)
+ cFYI(1, "Unable to send echo request to server: %s",
+ server->hostname);
+
+requeue_echo:
+ queue_delayed_work(system_nrt_wq, &server->echo, SMB_ECHO_INTERVAL);
+}
+
static int
cifs_demultiplex_thread(struct TCP_Server_Info *server)
{
@@ -345,8 +368,7 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
struct msghdr smb_msg;
struct kvec iov;
struct socket *csocket = server->ssocket;
- struct list_head *tmp;
- struct cifsSesInfo *ses;
+ struct list_head *tmp, *tmp2;
struct task_struct *task_to_wake = NULL;
struct mid_q_entry *mid_entry;
char temp;
@@ -399,7 +421,20 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
smb_msg.msg_control = NULL;
smb_msg.msg_controllen = 0;
pdu_length = 4; /* enough to get RFC1001 header */
+
incomplete_rcv:
+ if (echo_retries > 0 &&
+ time_after(jiffies, server->lstrp +
+ (echo_retries * SMB_ECHO_INTERVAL))) {
+ cERROR(1, "Server %s has not responded in %d seconds. "
+ "Reconnecting...", server->hostname,
+ (echo_retries * SMB_ECHO_INTERVAL / HZ));
+ cifs_reconnect(server);
+ csocket = server->ssocket;
+ wake_up(&server->response_q);
+ continue;
+ }
+
length =
kernel_recvmsg(csocket, &smb_msg,
&iov, 1, pdu_length, 0 /* BB other flags? */);
@@ -559,10 +594,11 @@ incomplete_rcv:
continue;
}
+ mid_entry = NULL;
+ server->lstrp = jiffies;
- task_to_wake = NULL;
spin_lock(&GlobalMid_Lock);
- list_for_each(tmp, &server->pending_mid_q) {
+ list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
if ((mid_entry->mid == smb_buffer->Mid) &&
@@ -603,20 +639,19 @@ incomplete_rcv:
mid_entry->resp_buf = smb_buffer;
mid_entry->largeBuf = isLargeBuf;
multi_t2_fnd:
- task_to_wake = mid_entry->tsk;
mid_entry->midState = MID_RESPONSE_RECEIVED;
+ list_del_init(&mid_entry->qhead);
+ mid_entry->callback(mid_entry);
#ifdef CONFIG_CIFS_STATS2
mid_entry->when_received = jiffies;
#endif
- /* so we do not time out requests to server
- which is still responding (since server could
- be busy but not dead) */
- server->lstrp = jiffies;
break;
}
+ mid_entry = NULL;
}
spin_unlock(&GlobalMid_Lock);
- if (task_to_wake) {
+
+ if (mid_entry != NULL) {
/* Was previous buf put in mpx struct for multi-rsp? */
if (!isMultiRsp) {
/* smb buffer will be freed by user thread */
@@ -625,11 +660,10 @@ multi_t2_fnd:
else
smallbuf = NULL;
}
- wake_up_process(task_to_wake);
} else if (!is_valid_oplock_break(smb_buffer, server) &&
!isMultiRsp) {
cERROR(1, "No task to wake, unknown frame received! "
- "NumMids %d", midCount.counter);
+ "NumMids %d", atomic_read(&midCount));
cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
sizeof(struct smb_hdr));
#ifdef CONFIG_CIFS_DEBUG2
@@ -677,44 +711,16 @@ multi_t2_fnd:
if (smallbuf) /* no sense logging a debug message if NULL */
cifs_small_buf_release(smallbuf);
- /*
- * BB: we shouldn't have to do any of this. It shouldn't be
- * possible to exit from the thread with active SMB sessions
- */
- spin_lock(&cifs_tcp_ses_lock);
- if (list_empty(&server->pending_mid_q)) {
- /* loop through server session structures attached to this and
- mark them dead */
- list_for_each(tmp, &server->smb_ses_list) {
- ses = list_entry(tmp, struct cifsSesInfo,
- smb_ses_list);
- ses->status = CifsExiting;
- ses->server = NULL;
- }
- spin_unlock(&cifs_tcp_ses_lock);
- } else {
- /* although we can not zero the server struct pointer yet,
- since there are active requests which may depnd on them,
- mark the corresponding SMB sessions as exiting too */
- list_for_each(tmp, &server->smb_ses_list) {
- ses = list_entry(tmp, struct cifsSesInfo,
- smb_ses_list);
- ses->status = CifsExiting;
- }
-
+ if (!list_empty(&server->pending_mid_q)) {
spin_lock(&GlobalMid_Lock);
- list_for_each(tmp, &server->pending_mid_q) {
- mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
- if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
- cFYI(1, "Clearing Mid 0x%x - waking up ",
+ list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
+ mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
+ cFYI(1, "Clearing Mid 0x%x - issuing callback",
mid_entry->mid);
- task_to_wake = mid_entry->tsk;
- if (task_to_wake)
- wake_up_process(task_to_wake);
- }
+ list_del_init(&mid_entry->qhead);
+ mid_entry->callback(mid_entry);
}
spin_unlock(&GlobalMid_Lock);
- spin_unlock(&cifs_tcp_ses_lock);
/* 1/8th of sec is more than enough time for them to exit */
msleep(125);
}
@@ -732,18 +738,6 @@ multi_t2_fnd:
coming home not much else we can do but free the memory */
}
- /* last chance to mark ses pointers invalid
- if there are any pointing to this (e.g
- if a crazy root user tried to kill cifsd
- kernel thread explicitly this might happen) */
- /* BB: This shouldn't be necessary, see above */
This diff is incomplete. Download the complete patch.
fs/cifs/file.c
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fs/cifs/misc.c
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fs/cifs/sess.c
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fs/cifs/transport.c
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