btrfs: Ignore errors from btrfs_qgroup_trace_extent_post
Running generic/019 with qgroups on the scratch device enabled is almost
guaranteed to trigger the BUG_ON in btrfs_free_tree_block. It's supposed
to trigger only on -ENOMEM, in reality, however, it's possible to get
-EIO from btrfs_qgroup_trace_extent_post. This function just finds the
roots of the extent being tracked and sets the qrecord->old_roots list.
If this operation fails nothing critical happens except the quota
accounting can be considered wrong. In such case just set the
INCONSISTENT flag for the quota and print a warning, rather than killing
off the system. Additionally, it's possible to trigger a BUG_ON in
btrfs_truncate_inode_items as well.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
[ error message adjustments ]
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c
index a1a40cf..7ab5e01 100644
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -821,7 +821,8 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
spin_unlock(&delayed_refs->lock);
if (qrecord_inserted)
- return btrfs_qgroup_trace_extent_post(fs_info, record);
+ btrfs_qgroup_trace_extent_post(fs_info, record);
+
return 0;
free_head_ref:
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 9e61dd6..aa259d6 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -1442,8 +1442,13 @@ int btrfs_qgroup_trace_extent_post(struct btrfs_fs_info *fs_info,
int ret;
ret = btrfs_find_all_roots(NULL, fs_info, bytenr, 0, &old_root, false);
- if (ret < 0)
- return ret;
+ if (ret < 0) {
+ fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
+ btrfs_warn(fs_info,
+"error accounting new delayed refs extent (err code: %d), quota inconsistent",
+ ret);
+ return 0;
+ }
/*
* Here we don't need to get the lock of