diff options
| -rw-r--r-- | fs/btrfs/block-group.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c index 5bd76a45037e..d5421ee0d366 100644 --- a/fs/btrfs/block-group.c +++ b/fs/btrfs/block-group.c @@ -2105,11 +2105,22 @@ static int fill_dummy_bgs(struct btrfs_fs_info *fs_info) bg->used = em->len; bg->flags = map->type; ret = btrfs_add_block_group_cache(fs_info, bg); + /* + * We may have some valid block group cache added already, in + * that case we skip to the next one. + */ + if (ret == -EEXIST) { + ret = 0; + btrfs_put_block_group(bg); + continue; + } + if (ret) { btrfs_remove_free_space_cache(bg); btrfs_put_block_group(bg); break; } + btrfs_update_space_info(fs_info, bg->flags, em->len, em->len, 0, 0, &space_info); bg->space_info = space_info; @@ -2212,6 +2223,14 @@ int btrfs_read_block_groups(struct btrfs_fs_info *info) ret = check_chunk_block_group_mappings(info); error: btrfs_free_path(path); + /* + * We've hit some error while reading the extent tree, and have + * rescue=ibadroots mount option. + * Try to fill the tree using dummy block groups so that the user can + * continue to mount and grab their data. + */ + if (ret && btrfs_test_opt(info, IGNOREBADROOTS)) + ret = fill_dummy_bgs(info); return ret; } |