From: David Sterba dsterba@suse.com
stable inclusion from stable-5.10.50 commit 80d05ce58a0b22595b1bb80ed8d0cd03e7d924c4 bugzilla: 174522 https://gitee.com/openeuler/kernel/issues/I4DNFY
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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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: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Chen Jun chenjun102@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 af2f2f8704d8..8daa9e4eb1d2 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -1382,8 +1382,10 @@ 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);