From: David Sterba dsterba@suse.com
stable inclusion from linux-4.19.198 commit e00c01b74add2dfa6947c1cefc74760e560dbf55
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commit 6819703f5a365c95488b07066a8744841bf14231 upstream.
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@vger.kernel.org # 4.4+ Reviewed-by: Qu Wenruo wqu@suse.com Reviewed-by: Anand Jain anand.jain@oracle.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- 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 1b52c960682d6..049535115c9dc 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -1311,8 +1311,10 @@ 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);