summaryrefslogtreecommitdiff
path: root/fs/btrfs/tree-checker.c
diff options
context:
space:
mode:
authorBoris Burkov <boris@bur.io>2023-01-31 01:45:55 +0300
committerDavid Sterba <dsterba@suse.com>2023-10-12 17:44:11 +0300
commitd9a620f77e33f2b0e9a5f131f3ee3c66d3285c57 (patch)
tree58c86124cd45a5777de063a8efa5b5cd08454302 /fs/btrfs/tree-checker.c
parentcf79ac47932b377d0cfe6b61f4472cdc17eac042 (diff)
downloadlinux-d9a620f77e33f2b0e9a5f131f3ee3c66d3285c57.tar.xz
btrfs: new inline ref storing owning subvol of data extents
In order to implement simple quota groups, we need to be able to associate a data extent with the subvolume that created it. Once you account for reflink, this information cannot be recovered without explicitly storing it. Options for storing it are: - a new key/item - a new extent inline ref item The former is backwards compatible, but wastes space, the latter is incompat, but is efficient in space and reuses the existing inline ref machinery, while only abusing it a tiny amount -- specifically, the new item is not a ref, per-se. Signed-off-by: Boris Burkov <boris@bur.io> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/tree-checker.c')
-rw-r--r--fs/btrfs/tree-checker.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
index 1547090bf2c0..1f2c389b0bfa 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -1467,6 +1467,9 @@ static int check_extent_item(struct extent_buffer *leaf,
}
inline_refs += btrfs_shared_data_ref_count(leaf, sref);
break;
+ case BTRFS_EXTENT_OWNER_REF_KEY:
+ WARN_ON(!btrfs_fs_incompat(fs_info, SIMPLE_QUOTA));
+ break;
default:
extent_err(leaf, slot, "unknown inline ref type: %u",
inline_type);