diff options
Diffstat (limited to 'fs/btrfs/block-group.c')
| -rw-r--r-- | fs/btrfs/block-group.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c index 53c44c52cb79..e7b5a54c8258 100644 --- a/fs/btrfs/block-group.c +++ b/fs/btrfs/block-group.c @@ -2164,7 +2164,16 @@ int btrfs_read_block_groups(struct btrfs_fs_info *info) int need_clear = 0; u64 cache_gen; - if (!root) + /* + * Either no extent root (with ibadroots rescue option) or we have + * unsupported RO options. The fs can never be mounted read-write, so no + * need to waste time searching block group items. + * + * This also allows new extent tree related changes to be RO compat, + * no need for a full incompat flag. + */ + if (!root || (btrfs_super_compat_ro_flags(info->super_copy) & + ~BTRFS_FEATURE_COMPAT_RO_SUPP)) return fill_dummy_bgs(info); key.objectid = 0; |