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btrfs: clear defrag status of a root if starting transaction fails

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commit 6819703f5a 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>
This commit is contained in:
David Sterba 2020-07-07 18:30:06 +02:00 committed by Greg Kroah-Hartman
parent 6b00b1717f
commit 80d05ce58a
1 changed files with 4 additions and 2 deletions
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6
fs/btrfs/transaction.c
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@ -1382,8 +1382,10 @@ int btrfs_defrag_root(struct btrfs_root *root)
while (1) { while (1) {
trans = btrfs_start_transaction(root, 0); trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans)) if (IS_ERR(trans)) {
return PTR_ERR(trans); ret = PTR_ERR(trans);
break;
}
ret = btrfs_defrag_leaves(trans, root); ret = btrfs_defrag_leaves(trans, root);