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-rw-r--r--fs/btrfs/qgroup.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index db723c0026bd..ba323dcb0a0b 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -1174,6 +1174,21 @@ out_add_root:
fs_info->qgroup_rescan_running = true;
btrfs_queue_work(fs_info->qgroup_rescan_workers,
&fs_info->qgroup_rescan_work);
+ } else {
+ /*
+ * We have set both BTRFS_FS_QUOTA_ENABLED and
+ * BTRFS_QGROUP_STATUS_FLAG_ON, so we can only fail with
+ * -EINPROGRESS. That can happen because someone started the
+ * rescan worker by calling quota rescan ioctl before we
+ * attempted to initialize the rescan worker. Failure due to
+ * quotas disabled in the meanwhile is not possible, because
+ * we are holding a write lock on fs_info->subvol_sem, which
+ * is also acquired when disabling quotas.
+ * Ignore such error, and any other error would need to undo
+ * everything we did in the transaction we just committed.
+ */
+ ASSERT(ret == -EINPROGRESS);
+ ret = 0;
}
out_free_path: