diff options
Diffstat (limited to 'fs/btrfs/tree-log.c')
| -rw-r--r-- | fs/btrfs/tree-log.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 013d0abcd46b..5baad9bebc62 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -5758,6 +5758,22 @@ static int btrfs_log_inode_parent(struct btrfs_trans_handle *trans, goto end_trans; } + /* + * If a new hard link was added to the inode in the current transaction + * and its link count is now greater than 1, we need to fallback to a + * transaction commit, otherwise we can end up not logging all its new + * parents for all the hard links. Here just from the dentry used to + * fsync, we can not visit the ancestor inodes for all the other hard + * links to figure out if any is new, so we fallback to a transaction + * commit (instead of adding a lot of complexity of scanning a btree, + * since this scenario is not a common use case). + */ + if (inode->vfs_inode.i_nlink > 1 && + inode->last_link_trans > last_committed) { + ret = -EMLINK; + goto end_trans; + } + while (1) { if (!parent || d_really_is_negative(parent) || sb != parent->d_sb) break; |