diff options
| author | Mark Harmstone <mark@harmstone.com> | 2026-01-07 14:09:08 +0000 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2026-02-03 07:54:35 +0100 |
| commit | 8620da16fb6be1fd9906374fa1c763a10c6918df (patch) | |
| tree | d3de7563e93b361004cd2f7c50751a5ffaf8096c /include | |
| parent | 7977011460cffc6f5a0cd830584c832c4aa07076 (diff) | |
btrfs: allow mounting filesystems with remap-tree incompat flag
If we encounter a filesystem with the remap-tree incompat flag set,
validate its compatibility with the other flags, and load the remap tree
using the values that have been added to the superblock.
The remap-tree feature depends on the free-space-tree, but no-holes and
block-group-tree have been made dependencies to reduce the testing
matrix. Similarly I'm not aware of any reason why mixed-bg and zoned would be
incompatible with remap-tree, but this is blocked for the time being
until it can be fully tested.
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Mark Harmstone <mark@harmstone.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/btrfs_tree.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/uapi/linux/btrfs_tree.h b/include/uapi/linux/btrfs_tree.h index 86820a9644e8..f7843e6bb978 100644 --- a/include/uapi/linux/btrfs_tree.h +++ b/include/uapi/linux/btrfs_tree.h @@ -721,9 +721,12 @@ struct btrfs_super_block { __u8 metadata_uuid[BTRFS_FSID_SIZE]; __u64 nr_global_roots; + __le64 remap_root; + __le64 remap_root_generation; + __u8 remap_root_level; /* Future expansion */ - __le64 reserved[27]; + __u8 reserved[199]; __u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; |