Merge tag 'for-5.8-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Merge commit. Changes below are compared with the first parent: 8eeae5ba.
Changes
52 files changed · +3224 −3045
Only the first 600 diff lines are shown. Download the complete patch.
.clang-format
View filediff --git a/.clang-format b/.clang-format
index e92e6dd..a0a9608 100644
--- a/.clang-format
+++ b/.clang-format
@@ -80,6 +80,7 @@ ForEachMacros:
- 'ax25_uid_for_each'
- '__bio_for_each_bvec'
- 'bio_for_each_bvec'
+ - 'bio_for_each_bvec_all'
- 'bio_for_each_integrity_vec'
- '__bio_for_each_segment'
- 'bio_for_each_segment'
Documentation/block/biovecs.rst
View filediff --git a/Documentation/block/biovecs.rst b/Documentation/block/biovecs.rst
index ad303a2..36771a1 100644
--- a/Documentation/block/biovecs.rst
+++ b/Documentation/block/biovecs.rst
@@ -129,6 +129,7 @@ Usage of helpers:
::
bio_for_each_segment_all()
+ bio_for_each_bvec_all()
bio_first_bvec_all()
bio_first_page_all()
bio_last_bvec_all()
@@ -143,4 +144,5 @@ Usage of helpers:
bio_vec' will contain a multi-page IO vector during the iteration::
bio_for_each_bvec()
+ bio_for_each_bvec_all()
rq_for_each_bvec()
fs/btrfs/Kconfig
View filediff --git a/fs/btrfs/Kconfig b/fs/btrfs/Kconfig
index 575636f..68b95ad 100644
--- a/fs/btrfs/Kconfig
+++ b/fs/btrfs/Kconfig
@@ -14,6 +14,7 @@ config BTRFS_FS
select LZO_DECOMPRESS
select ZSTD_COMPRESS
select ZSTD_DECOMPRESS
+ select FS_IOMAP
select RAID6_PQ
select XOR_BLOCKS
select SRCU
fs/btrfs/backref.c
View filediff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 0cc0257..d888e71 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -13,6 +13,7 @@
#include "transaction.h"
#include "delayed-ref.h"
#include "locking.h"
+#include "misc.h"
/* Just an arbitrary number so we can be sure this happened */
#define BACKREF_FOUND_SHARED 6
@@ -537,18 +538,13 @@ static int resolve_indirect_ref(struct btrfs_fs_info *fs_info,
const u64 *extent_item_pos, bool ignore_offset)
{
struct btrfs_root *root;
- struct btrfs_key root_key;
struct extent_buffer *eb;
int ret = 0;
int root_level;
int level = ref->level;
struct btrfs_key search_key = ref->key_for_search;
- root_key.objectid = ref->root_id;
- root_key.type = BTRFS_ROOT_ITEM_KEY;
- root_key.offset = (u64)-1;
-
- root = btrfs_get_fs_root(fs_info, &root_key, false);
+ root = btrfs_get_fs_root(fs_info, ref->root_id, false);
if (IS_ERR(root)) {
ret = PTR_ERR(root);
goto out_free;
@@ -2295,3 +2291,832 @@ void free_ipath(struct inode_fs_paths *ipath)
kvfree(ipath->fspath);
kfree(ipath);
}
+
+struct btrfs_backref_iter *btrfs_backref_iter_alloc(
+ struct btrfs_fs_info *fs_info, gfp_t gfp_flag)
+{
+ struct btrfs_backref_iter *ret;
+
+ ret = kzalloc(sizeof(*ret), gfp_flag);
+ if (!ret)
+ return NULL;
+
+ ret->path = btrfs_alloc_path();
+ if (!ret) {
+ kfree(ret);
+ return NULL;
+ }
+
+ /* Current backref iterator only supports iteration in commit root */
+ ret->path->search_commit_root = 1;
+ ret->path->skip_locking = 1;
+ ret->fs_info = fs_info;
+
+ return ret;
+}
+
+int btrfs_backref_iter_start(struct btrfs_backref_iter *iter, u64 bytenr)
+{
+ struct btrfs_fs_info *fs_info = iter->fs_info;
+ struct btrfs_path *path = iter->path;
+ struct btrfs_extent_item *ei;
+ struct btrfs_key key;
+ int ret;
+
+ key.objectid = bytenr;
+ key.type = BTRFS_METADATA_ITEM_KEY;
+ key.offset = (u64)-1;
+ iter->bytenr = bytenr;
+
+ ret = btrfs_search_slot(NULL, fs_info->extent_root, &key, path, 0, 0);
+ if (ret < 0)
+ return ret;
+ if (ret == 0) {
+ ret = -EUCLEAN;
+ goto release;
+ }
+ if (path->slots[0] == 0) {
+ WARN_ON(IS_ENABLED(CONFIG_BTRFS_DEBUG));
+ ret = -EUCLEAN;
+ goto release;
+ }
+ path->slots[0]--;
+
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+ if ((key.type != BTRFS_EXTENT_ITEM_KEY &&
+ key.type != BTRFS_METADATA_ITEM_KEY) || key.objectid != bytenr) {
+ ret = -ENOENT;
+ goto release;
+ }
+ memcpy(&iter->cur_key, &key, sizeof(key));
+ iter->item_ptr = (u32)btrfs_item_ptr_offset(path->nodes[0],
+ path->slots[0]);
+ iter->end_ptr = (u32)(iter->item_ptr +
+ btrfs_item_size_nr(path->nodes[0], path->slots[0]));
+ ei = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_extent_item);
+
+ /*
+ * Only support iteration on tree backref yet.
+ *
+ * This is an extra precaution for non skinny-metadata, where
+ * EXTENT_ITEM is also used for tree blocks, that we can only use
+ * extent flags to determine if it's a tree block.
+ */
+ if (btrfs_extent_flags(path->nodes[0], ei) & BTRFS_EXTENT_FLAG_DATA) {
+ ret = -ENOTSUPP;
+ goto release;
+ }
+ iter->cur_ptr = (u32)(iter->item_ptr + sizeof(*ei));
+
+ /* If there is no inline backref, go search for keyed backref */
+ if (iter->cur_ptr >= iter->end_ptr) {
+ ret = btrfs_next_item(fs_info->extent_root, path);
+
+ /* No inline nor keyed ref */
+ if (ret > 0) {
+ ret = -ENOENT;
+ goto release;
+ }
+ if (ret < 0)
+ goto release;
+
+ btrfs_item_key_to_cpu(path->nodes[0], &iter->cur_key,
+ path->slots[0]);
+ if (iter->cur_key.objectid != bytenr ||
+ (iter->cur_key.type != BTRFS_SHARED_BLOCK_REF_KEY &&
+ iter->cur_key.type != BTRFS_TREE_BLOCK_REF_KEY)) {
+ ret = -ENOENT;
+ goto release;
+ }
+ iter->cur_ptr = (u32)btrfs_item_ptr_offset(path->nodes[0],
+ path->slots[0]);
+ iter->item_ptr = iter->cur_ptr;
+ iter->end_ptr = (u32)(iter->item_ptr + btrfs_item_size_nr(
+ path->nodes[0], path->slots[0]));
+ }
+
+ return 0;
+release:
+ btrfs_backref_iter_release(iter);
+ return ret;
+}
+
+/*
+ * Go to the next backref item of current bytenr, can be either inlined or
+ * keyed.
+ *
+ * Caller needs to check whether it's inline ref or not by iter->cur_key.
+ *
+ * Return 0 if we get next backref without problem.
+ * Return >0 if there is no extra backref for this bytenr.
+ * Return <0 if there is something wrong happened.
+ */
+int btrfs_backref_iter_next(struct btrfs_backref_iter *iter)
+{
+ struct extent_buffer *eb = btrfs_backref_get_eb(iter);
+ struct btrfs_path *path = iter->path;
+ struct btrfs_extent_inline_ref *iref;
+ int ret;
+ u32 size;
+
+ if (btrfs_backref_iter_is_inline_ref(iter)) {
+ /* We're still inside the inline refs */
+ ASSERT(iter->cur_ptr < iter->end_ptr);
+
+ if (btrfs_backref_has_tree_block_info(iter)) {
+ /* First tree block info */
+ size = sizeof(struct btrfs_tree_block_info);
+ } else {
+ /* Use inline ref type to determine the size */
+ int type;
+
+ iref = (struct btrfs_extent_inline_ref *)
+ ((unsigned long)iter->cur_ptr);
+ type = btrfs_extent_inline_ref_type(eb, iref);
+
+ size = btrfs_extent_inline_ref_size(type);
+ }
+ iter->cur_ptr += size;
+ if (iter->cur_ptr < iter->end_ptr)
+ return 0;
+
+ /* All inline items iterated, fall through */
+ }
+
+ /* We're at keyed items, there is no inline item, go to the next one */
+ ret = btrfs_next_item(iter->fs_info->extent_root, iter->path);
+ if (ret)
+ return ret;
+
+ btrfs_item_key_to_cpu(path->nodes[0], &iter->cur_key, path->slots[0]);
+ if (iter->cur_key.objectid != iter->bytenr ||
+ (iter->cur_key.type != BTRFS_TREE_BLOCK_REF_KEY &&
+ iter->cur_key.type != BTRFS_SHARED_BLOCK_REF_KEY))
+ return 1;
+ iter->item_ptr = (u32)btrfs_item_ptr_offset(path->nodes[0],
+ path->slots[0]);
+ iter->cur_ptr = iter->item_ptr;
+ iter->end_ptr = iter->item_ptr + (u32)btrfs_item_size_nr(path->nodes[0],
+ path->slots[0]);
+ return 0;
+}
+
+void btrfs_backref_init_cache(struct btrfs_fs_info *fs_info,
+ struct btrfs_backref_cache *cache, int is_reloc)
+{
+ int i;
+
+ cache->rb_root = RB_ROOT;
+ for (i = 0; i < BTRFS_MAX_LEVEL; i++)
+ INIT_LIST_HEAD(&cache->pending[i]);
+ INIT_LIST_HEAD(&cache->changed);
+ INIT_LIST_HEAD(&cache->detached);
+ INIT_LIST_HEAD(&cache->leaves);
+ INIT_LIST_HEAD(&cache->pending_edge);
+ INIT_LIST_HEAD(&cache->useless_node);
+ cache->fs_info = fs_info;
+ cache->is_reloc = is_reloc;
+}
+
+struct btrfs_backref_node *btrfs_backref_alloc_node(
+ struct btrfs_backref_cache *cache, u64 bytenr, int level)
+{
+ struct btrfs_backref_node *node;
+
+ ASSERT(level >= 0 && level < BTRFS_MAX_LEVEL);
+ node = kzalloc(sizeof(*node), GFP_NOFS);
+ if (!node)
+ return node;
+
+ INIT_LIST_HEAD(&node->list);
+ INIT_LIST_HEAD(&node->upper);
+ INIT_LIST_HEAD(&node->lower);
+ RB_CLEAR_NODE(&node->rb_node);
+ cache->nr_nodes++;
+ node->level = level;
+ node->bytenr = bytenr;
+
+ return node;
+}
+
+struct btrfs_backref_edge *btrfs_backref_alloc_edge(
+ struct btrfs_backref_cache *cache)
+{
+ struct btrfs_backref_edge *edge;
+
+ edge = kzalloc(sizeof(*edge), GFP_NOFS);
+ if (edge)
+ cache->nr_edges++;
+ return edge;
+}
+
+/*
+ * Drop the backref node from cache, also cleaning up all its
+ * upper edges and any uncached nodes in the path.
+ *
+ * This cleanup happens bottom up, thus the node should either
+ * be the lowest node in the cache or a detached node.
+ */
+void btrfs_backref_cleanup_node(struct btrfs_backref_cache *cache,
+ struct btrfs_backref_node *node)
+{
+ struct btrfs_backref_node *upper;
+ struct btrfs_backref_edge *edge;
+
+ if (!node)
+ return;
+
+ BUG_ON(!node->lowest && !node->detached);
+ while (!list_empty(&node->upper)) {
+ edge = list_entry(node->upper.next, struct btrfs_backref_edge,
+ list[LOWER]);
+ upper = edge->node[UPPER];
+ list_del(&edge->list[LOWER]);
+ list_del(&edge->list[UPPER]);
+ btrfs_backref_free_edge(cache, edge);
+
+ if (RB_EMPTY_NODE(&upper->rb_node)) {
+ BUG_ON(!list_empty(&node->upper));
+ btrfs_backref_drop_node(cache, node);
+ node = upper;
+ node->lowest = 1;
+ continue;
+ }
+ /*
+ * Add the node to leaf node list if no other child block
+ * cached.
+ */
+ if (list_empty(&upper->lower)) {
+ list_add_tail(&upper->lower, &cache->leaves);
+ upper->lowest = 1;
+ }
+ }
+
+ btrfs_backref_drop_node(cache, node);
+}
+
+/*
+ * Release all nodes/edges from current cache
+ */
+void btrfs_backref_release_cache(struct btrfs_backref_cache *cache)
+{
+ struct btrfs_backref_node *node;
+ int i;
+
+ while (!list_empty(&cache->detached)) {
+ node = list_entry(cache->detached.next,
+ struct btrfs_backref_node, list);
+ btrfs_backref_cleanup_node(cache, node);
+ }
+
+ while (!list_empty(&cache->leaves)) {
+ node = list_entry(cache->leaves.next,
+ struct btrfs_backref_node, lower);
+ btrfs_backref_cleanup_node(cache, node);
+ }
+
+ cache->last_trans = 0;
+
+ for (i = 0; i < BTRFS_MAX_LEVEL; i++)
+ ASSERT(list_empty(&cache->pending[i]));
+ ASSERT(list_empty(&cache->pending_edge));
+ ASSERT(list_empty(&cache->useless_node));
+ ASSERT(list_empty(&cache->changed));
+ ASSERT(list_empty(&cache->detached));
+ ASSERT(RB_EMPTY_ROOT(&cache->rb_root));
+ ASSERT(!cache->nr_nodes);
+ ASSERT(!cache->nr_edges);
+}
+
+/*
+ * Handle direct tree backref
+ *
+ * Direct tree backref means, the backref item shows its parent bytenr
+ * directly. This is for SHARED_BLOCK_REF backref (keyed or inlined).
+ *
+ * @ref_key: The converted backref key.
+ * For keyed backref, it's the item key.
+ * For inlined backref, objectid is the bytenr,
+ * type is btrfs_inline_ref_type, offset is
+ * btrfs_inline_ref_offset.
+ */
+static int handle_direct_tree_backref(struct btrfs_backref_cache *cache,
+ struct btrfs_key *ref_key,
+ struct btrfs_backref_node *cur)
+{
+ struct btrfs_backref_edge *edge;
+ struct btrfs_backref_node *upper;
+ struct rb_node *rb_node;
+
+ ASSERT(ref_key->type == BTRFS_SHARED_BLOCK_REF_KEY);
+
+ /* Only reloc root uses backref pointing to itself */
+ if (ref_key->objectid == ref_key->offset) {
+ struct btrfs_root *root;
+
+ cur->is_reloc_root = 1;
+ /* Only reloc backref cache cares about a specific root */
+ if (cache->is_reloc) {
+ root = find_reloc_root(cache->fs_info, cur->bytenr);
+ if (WARN_ON(!root))
+ return -ENOENT;
+ cur->root = root;
+ } else {
+ /*
+ * For generic purpose backref cache, reloc root node
+ * is useless.
+ */
+ list_add(&cur->list, &cache->useless_node);
+ }
+ return 0;
+ }
+
+ edge = btrfs_backref_alloc_edge(cache);
+ if (!edge)
+ return -ENOMEM;
+
+ rb_node = rb_simple_search(&cache->rb_root, ref_key->offset);
+ if (!rb_node) {
+ /* Parent node not yet cached */
+ upper = btrfs_backref_alloc_node(cache, ref_key->offset,
+ cur->level + 1);
+ if (!upper) {
+ btrfs_backref_free_edge(cache, edge);
+ return -ENOMEM;
+ }
+
+ /*
+ * Backrefs for the upper level block isn't cached, add the
+ * block to pending list
+ */
+ list_add_tail(&edge->list[UPPER], &cache->pending_edge);
+ } else {
+ /* Parent node already cached */
+ upper = rb_entry(rb_node, struct btrfs_backref_node, rb_node);
+ ASSERT(upper->checked);
+ INIT_LIST_HEAD(&edge->list[UPPER]);
+ }
+ btrfs_backref_link_edge(edge, cur, upper, LINK_LOWER);
+ return 0;
+}
+
+/*
+ * Handle indirect tree backref
+ *
+ * Indirect tree backref means, we only know which tree the node belongs to.
+ * We still need to do a tree search to find out the parents. This is for
+ * TREE_BLOCK_REF backref (keyed or inlined).
+ *
+ * @ref_key: The same as @ref_key in handle_direct_tree_backref()
+ * @tree_key: The first key of this tree block.
+ * @path: A clean (released) path, to avoid allocating path everytime
+ * the function get called.
+ */
+static int handle_indirect_tree_backref(struct btrfs_backref_cache *cache,
+ struct btrfs_path *path,
+ struct btrfs_key *ref_key,
+ struct btrfs_key *tree_key,
+ struct btrfs_backref_node *cur)
+{
+ struct btrfs_fs_info *fs_info = cache->fs_info;
+ struct btrfs_backref_node *upper;
+ struct btrfs_backref_node *lower;
+ struct btrfs_backref_edge *edge;
+ struct extent_buffer *eb;
+ struct btrfs_root *root;
+ struct rb_node *rb_node;
+ int level;
+ bool need_check = true;
+ int ret;
+
+ root = btrfs_get_fs_root(fs_info, ref_key->offset, false);
+ if (IS_ERR(root))
+ return PTR_ERR(root);
+ if (!test_bit(BTRFS_ROOT_SHAREABLE, &root->state))
+ cur->cowonly = 1;
+
+ if (btrfs_root_level(&root->root_item) == cur->level) {
+ /* Tree root */
+ ASSERT(btrfs_root_bytenr(&root->root_item) == cur->bytenr);
+ /*
+ * For reloc backref cache, we may ignore reloc root. But for
+ * general purpose backref cache, we can't rely on
+ * btrfs_should_ignore_reloc_root() as it may conflict with
+ * current running relocation and lead to missing root.
+ *
+ * For general purpose backref cache, reloc root detection is
+ * completely relying on direct backref (key->offset is parent
+ * bytenr), thus only do such check for reloc cache.
+ */
+ if (btrfs_should_ignore_reloc_root(root) && cache->is_reloc) {
+ btrfs_put_root(root);
+ list_add(&cur->list, &cache->useless_node);
+ } else {
+ cur->root = root;
+ }
+ return 0;
+ }
+
+ level = cur->level + 1;
+
+ /* Search the tree to find parent blocks referring to the block */
+ path->search_commit_root = 1;
+ path->skip_locking = 1;
+ path->lowest_level = level;
+ ret = btrfs_search_slot(NULL, root, tree_key, path, 0, 0);
+ path->lowest_level = 0;
+ if (ret < 0) {
+ btrfs_put_root(root);
+ return ret;
+ }
+ if (ret > 0 && path->slots[level] > 0)
+ path->slots[level]--;
+
+ eb = path->nodes[level];
+ if (btrfs_node_blockptr(eb, path->slots[level]) != cur->bytenr) {
+ btrfs_err(fs_info,
+"couldn't find block (%llu) (level %d) in tree (%llu) with key (%llu %u %llu)",
+ cur->bytenr, level - 1, root->root_key.objectid,
+ tree_key->objectid, tree_key->type, tree_key->offset);
+ btrfs_put_root(root);
+ ret = -ENOENT;
+ goto out;
+ }
+ lower = cur;
+
+ /* Add all nodes and edges in the path */
+ for (; level < BTRFS_MAX_LEVEL; level++) {
+ if (!path->nodes[level]) {
+ ASSERT(btrfs_root_bytenr(&root->root_item) ==
+ lower->bytenr);
+ /* Same as previous should_ignore_reloc_root() call */
+ if (btrfs_should_ignore_reloc_root(root) &&
+ cache->is_reloc) {
+ btrfs_put_root(root);
+ list_add(&lower->list, &cache->useless_node);
+ } else {
+ lower->root = root;
+ }
+ break;
+ }
+
+ edge = btrfs_backref_alloc_edge(cache);
+ if (!edge) {
+ btrfs_put_root(root);
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ eb = path->nodes[level];
+ rb_node = rb_simple_search(&cache->rb_root, eb->start);
+ if (!rb_node) {
+ upper = btrfs_backref_alloc_node(cache, eb->start,
+ lower->level + 1);
+ if (!upper) {
+ btrfs_put_root(root);
+ btrfs_backref_free_edge(cache, edge);
+ ret = -ENOMEM;
+ goto out;
+ }
+ upper->owner = btrfs_header_owner(eb);
+ if (!test_bit(BTRFS_ROOT_SHAREABLE, &root->state))
+ upper->cowonly = 1;
+
+ /*
+ * If we know the block isn't shared we can avoid
+ * checking its backrefs.
+ */
+ if (btrfs_block_can_be_shared(root, eb))
+ upper->checked = 0;
+ else
+ upper->checked = 1;
+
+ /*
+ * Add the block to pending list if we need to check its
+ * backrefs, we only do this once while walking up a
+ * tree as we will catch anything else later on.
+ */
+ if (!upper->checked && need_check) {
+ need_check = false;
+ list_add_tail(&edge->list[UPPER],
+ &cache->pending_edge);
+ } else {
+ if (upper->checked)
+ need_check = true;
+ INIT_LIST_HEAD(&edge->list[UPPER]);
+ }
+ } else {
+ upper = rb_entry(rb_node, struct btrfs_backref_node,
+ rb_node);
+ ASSERT(upper->checked);
+ INIT_LIST_HEAD(&edge->list[UPPER]);
+ if (!upper->owner)
+ upper->owner = btrfs_header_owner(eb);
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fs/btrfs/backref.h
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fs/btrfs/block-group.c
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fs/btrfs/extent-io-tree.h
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fs/btrfs/extent_io.c
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fs/btrfs/file-item.c
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fs/btrfs/misc.h
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fs/btrfs/props.c
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fs/btrfs/relocation.c
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fs/btrfs/root-tree.c
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fs/btrfs/scrub.c
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fs/btrfs/space-info.c
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fs/btrfs/space-info.h
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fs/btrfs/struct-funcs.c
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fs/btrfs/super.c
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fs/btrfs/transaction.c
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fs/btrfs/transaction.h
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fs/btrfs/tree-checker.c
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fs/btrfs/tree-defrag.c
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fs/btrfs/tree-log.c
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fs/btrfs/uuid-tree.c
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fs/btrfs/volumes.c
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fs/direct-io.c
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fs/iomap/direct-io.c
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include/linux/bio.h
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include/linux/fs.h
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include/linux/iomap.h
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include/trace/events/btrfs.h
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include/uapi/linux/btrfs_tree.h
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mm/filemap.c
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