From: Filipe Manana <fdmanana@xxxxxxxx>
If a power failure happens while the qgroup rescan kthread is running,
the next mount operation will always fail. This is because of a recent
regression that makes qgroup_rescan_init() incorrectly return -EINVAL
when we are mounting the filesystem (through btrfs_read_qgroup_config()).
This causes the -EINVAL error to be returned regardless of any qgroup
flags being set instead of returning the error only when neither of
the flags BTRFS_QGROUP_STATUS_FLAG_RESCAN nor BTRFS_QGROUP_STATUS_FLAG_ON
are set.
A test case for fstests follows up soon.
Fixes: 9593bf49675e ("btrfs: qgroup: show more meaningful qgroup_rescan_init error message")
Signed-off-by: Filipe Manana <fdmanana@xxxxxxxx>
---
fs/btrfs/qgroup.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 1874a6d2e6f5..d4171de93087 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -2784,13 +2784,20 @@ qgroup_rescan_init(struct btrfs_fs_info *fs_info, u64 progress_objectid,
if (!init_flags) {
/* we're resuming qgroup rescan at mount time */
- if (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN))
+ if (!(fs_info->qgroup_flags &
+ BTRFS_QGROUP_STATUS_FLAG_RESCAN)) {
btrfs_warn(fs_info,
"qgroup rescan init failed, qgroup is not enabled");
- else if (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON))
+ ret = -EINVAL;
+ } else if (!(fs_info->qgroup_flags &
+ BTRFS_QGROUP_STATUS_FLAG_ON)) {
btrfs_warn(fs_info,
"qgroup rescan init failed, qgroup rescan is not queued");
- return -EINVAL;
+ ret = -EINVAL;
+ }
+
+ if (ret)
+ return ret;
}
mutex_lock(&fs_info->qgroup_rescan_lock);
--
2.11.0
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