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authorJosef Bacik <jbacik@fusionio.com>2013-09-11 11:57:23 -0400
committerChris Mason <chris.mason@fusionio.com>2013-09-21 11:05:25 -0400
commitdd8e721773fdab5ccc7fde44ec57e30b563243b2 (patch)
treecb008cbc777277de5f08b45d26141a1562b4f728 /fs
parenta5874ce6ce4a3e4fc3db254ccf6d59d8501a56d8 (diff)
downloadlinux-dd8e721773fdab5ccc7fde44ec57e30b563243b2.tar.bz2
Btrfs: replay dir_index items before other items
A user reported a bug where his log would not replay because he was getting -EEXIST back. This was because he had a file moved into a directory that was logged. What happens is the file had a lower inode number, and so it is processed first when replaying the log, and so we add the inode ref in for the directory it was moved to. But then we process the directories DIR_INDEX item and try to add the inode ref for that inode and it fails because we already added it when we replayed the inode. To solve this problem we need to just process any DIR_INDEX items we have in the log first so this all is taken care of, and then we can replay the rest of the items. With this patch my reproducer can remount the file system properly instead of erroring out. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/tree-log.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index aaa2e2b67478..c91309dea8da 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -93,7 +93,8 @@
*/
#define LOG_WALK_PIN_ONLY 0
#define LOG_WALK_REPLAY_INODES 1
-#define LOG_WALK_REPLAY_ALL 2
+#define LOG_WALK_REPLAY_DIR_INDEX 2
+#define LOG_WALK_REPLAY_ALL 3
static int btrfs_log_inode(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct inode *inode,
@@ -2027,6 +2028,15 @@ static int replay_one_buffer(struct btrfs_root *log, struct extent_buffer *eb,
if (ret)
break;
}
+
+ if (key.type == BTRFS_DIR_INDEX_KEY &&
+ wc->stage == LOG_WALK_REPLAY_DIR_INDEX) {
+ ret = replay_one_dir_item(wc->trans, root, path,
+ eb, i, &key);
+ if (ret)
+ break;
+ }
+
if (wc->stage < LOG_WALK_REPLAY_ALL)
continue;
@@ -2048,8 +2058,7 @@ static int replay_one_buffer(struct btrfs_root *log, struct extent_buffer *eb,
eb, i, &key);
if (ret)
break;
- } else if (key.type == BTRFS_DIR_ITEM_KEY ||
- key.type == BTRFS_DIR_INDEX_KEY) {
+ } else if (key.type == BTRFS_DIR_ITEM_KEY) {
ret = replay_one_dir_item(wc->trans, root, path,
eb, i, &key);
if (ret)