The defrag loop processes leaves in batches and starting transaction for
each. The whole defragmentation on a given root is protected by a bit
but in case the transaction fails, the bit is not cleared
In case the transaction fails the bit would prevent starting
defragmentation again, so make sure it's cleared.
CC: stable@xxxxxxxxxxxxxxx # 4.4+
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
---
fs/btrfs/transaction.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index e0a82aa7da89..22951621363f 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1406,8 +1406,10 @@ int btrfs_defrag_root(struct btrfs_root *root)
while (1) {
trans = btrfs_start_transaction(root, 0);
- if (IS_ERR(trans))
- return PTR_ERR(trans);
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ break;
+ }
ret = btrfs_defrag_leaves(trans, root);
--
2.29.2
