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authorLinus Torvalds <torvalds@linux-foundation.org>2013-04-14 10:52:54 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-04-14 10:52:54 -0700
commit3792a64fdeeb9cab56c22695aaeb0624f1b295b4 (patch)
tree6867fa61e0a61e87f3ec273248339dd72666afd2
parent3c91930f0cbd54d522d8844b221c36199a2dc11e (diff)
parent4bc4bee4595662d8bff92180d5c32e3313a704b0 (diff)
downloadlinux-3792a64fdeeb9cab56c22695aaeb0624f1b295b4.tar.bz2
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull one more btrfs fix from Chris Mason: "This has a recent fix from Josef for our tree log replay code. It fixes problems where the inode counter for the number of bytes in the file wasn't getting updated properly during fsync replay. The commit did get rebased this morning, but it was only to clean up the subject line. The code hasn't changed." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: Btrfs: make sure nbytes are right after log replay
-rw-r--r--fs/btrfs/tree-log.c48
1 files changed, 42 insertions, 6 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 451fad96ecd1..ef96381569a4 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -317,6 +317,7 @@ static noinline int overwrite_item(struct btrfs_trans_handle *trans,
unsigned long src_ptr;
unsigned long dst_ptr;
int overwrite_root = 0;
+ bool inode_item = key->type == BTRFS_INODE_ITEM_KEY;
if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID)
overwrite_root = 1;
@@ -326,6 +327,9 @@ static noinline int overwrite_item(struct btrfs_trans_handle *trans,
/* look for the key in the destination tree */
ret = btrfs_search_slot(NULL, root, key, path, 0, 0);
+ if (ret < 0)
+ return ret;
+
if (ret == 0) {
char *src_copy;
char *dst_copy;
@@ -367,6 +371,30 @@ static noinline int overwrite_item(struct btrfs_trans_handle *trans,
return 0;
}
+ /*
+ * We need to load the old nbytes into the inode so when we
+ * replay the extents we've logged we get the right nbytes.
+ */
+ if (inode_item) {
+ struct btrfs_inode_item *item;
+ u64 nbytes;
+
+ item = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_inode_item);
+ nbytes = btrfs_inode_nbytes(path->nodes[0], item);
+ item = btrfs_item_ptr(eb, slot,
+ struct btrfs_inode_item);
+ btrfs_set_inode_nbytes(eb, item, nbytes);
+ }
+ } else if (inode_item) {
+ struct btrfs_inode_item *item;
+
+ /*
+ * New inode, set nbytes to 0 so that the nbytes comes out
+ * properly when we replay the extents.
+ */
+ item = btrfs_item_ptr(eb, slot, struct btrfs_inode_item);
+ btrfs_set_inode_nbytes(eb, item, 0);
}
insert:
btrfs_release_path(path);
@@ -486,7 +514,7 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
int found_type;
u64 extent_end;
u64 start = key->offset;
- u64 saved_nbytes;
+ u64 nbytes = 0;
struct btrfs_file_extent_item *item;
struct inode *inode = NULL;
unsigned long size;
@@ -496,10 +524,19 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
found_type = btrfs_file_extent_type(eb, item);
if (found_type == BTRFS_FILE_EXTENT_REG ||
- found_type == BTRFS_FILE_EXTENT_PREALLOC)
- extent_end = start + btrfs_file_extent_num_bytes(eb, item);
- else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
+ found_type == BTRFS_FILE_EXTENT_PREALLOC) {
+ nbytes = btrfs_file_extent_num_bytes(eb, item);
+ extent_end = start + nbytes;
+
+ /*
+ * We don't add to the inodes nbytes if we are prealloc or a
+ * hole.
+ */
+ if (btrfs_file_extent_disk_bytenr(eb, item) == 0)
+ nbytes = 0;
+ } else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
size = btrfs_file_extent_inline_len(eb, item);
+ nbytes = btrfs_file_extent_ram_bytes(eb, item);
extent_end = ALIGN(start + size, root->sectorsize);
} else {
ret = 0;
@@ -548,7 +585,6 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
}
btrfs_release_path(path);
- saved_nbytes = inode_get_bytes(inode);
/* drop any overlapping extents */
ret = btrfs_drop_extents(trans, root, inode, start, extent_end, 1);
BUG_ON(ret);
@@ -635,7 +671,7 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
BUG_ON(ret);
}
- inode_set_bytes(inode, saved_nbytes);
+ inode_add_bytes(inode, nbytes);
ret = btrfs_update_inode(trans, root, inode);
out:
if (inode)