static int create_one_raid_group(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 type) { u64 chunk_start; u64 chunk_size; int ret; ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root, &chunk_start, &chunk_size, type); BUG_ON(ret); ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0, type, BTRFS_FIRST_CHUNK_TREE_OBJECTID, chunk_start, chunk_size); BUG_ON(ret); return ret; }
static int create_one_raid_group(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 type) { u64 chunk_start; u64 chunk_size; int ret; ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root, &chunk_start, &chunk_size, type); if (ret == -ENOSPC) { fprintf(stderr, "not enough free space\n"); exit(1); } BUG_ON(ret); ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0, type, BTRFS_FIRST_CHUNK_TREE_OBJECTID, chunk_start, chunk_size); BUG_ON(ret); return ret; }
static int create_chunks(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 num_of_meta_chunks, u64 size_of_data) { u64 chunk_start; u64 chunk_size; u64 meta_type = BTRFS_BLOCK_GROUP_METADATA; u64 data_type = BTRFS_BLOCK_GROUP_DATA; u64 minimum_data_chunk_size = 8 * 1024 * 1024; u64 i; int ret; for (i = 0; i < num_of_meta_chunks; i++) { ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root, &chunk_start, &chunk_size, meta_type); BUG_ON(ret); ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0, meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID, chunk_start, chunk_size); BUG_ON(ret); set_extent_dirty(&root->fs_info->free_space_cache, chunk_start, chunk_start + chunk_size - 1, 0); } if (size_of_data < minimum_data_chunk_size) size_of_data = minimum_data_chunk_size; ret = btrfs_alloc_data_chunk(trans, root->fs_info->extent_root, &chunk_start, size_of_data, data_type); BUG_ON(ret); ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0, data_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID, chunk_start, size_of_data); BUG_ON(ret); set_extent_dirty(&root->fs_info->free_space_cache, chunk_start, chunk_start + size_of_data - 1, 0); return ret; }
static int make_root_dir(struct btrfs_root *root, int mixed) { struct btrfs_trans_handle *trans; struct btrfs_key location; u64 bytes_used; u64 chunk_start = 0; u64 chunk_size = 0; int ret; trans = btrfs_start_transaction(root, 1); bytes_used = btrfs_super_bytes_used(root->fs_info->super_copy); root->fs_info->system_allocs = 1; ret = btrfs_make_block_group(trans, root, bytes_used, BTRFS_BLOCK_GROUP_SYSTEM, BTRFS_FIRST_CHUNK_TREE_OBJECTID, 0, BTRFS_MKFS_SYSTEM_GROUP_SIZE); BUG_ON(ret); if (mixed) { ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root, &chunk_start, &chunk_size, BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA); if (ret == -ENOSPC) { fprintf(stderr, "no space to alloc data/metadata chunk\n"); goto err; } BUG_ON(ret); ret = btrfs_make_block_group(trans, root, 0, BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA, BTRFS_FIRST_CHUNK_TREE_OBJECTID, chunk_start, chunk_size); BUG_ON(ret); printf("Created a data/metadata chunk of size %llu\n", chunk_size); } else { ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root, &chunk_start, &chunk_size, BTRFS_BLOCK_GROUP_METADATA); if (ret == -ENOSPC) { fprintf(stderr, "no space to alloc metadata chunk\n"); goto err; } BUG_ON(ret); ret = btrfs_make_block_group(trans, root, 0, BTRFS_BLOCK_GROUP_METADATA, BTRFS_FIRST_CHUNK_TREE_OBJECTID, chunk_start, chunk_size); BUG_ON(ret); } root->fs_info->system_allocs = 0; btrfs_commit_transaction(trans, root); trans = btrfs_start_transaction(root, 1); BUG_ON(!trans); if (!mixed) { ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root, &chunk_start, &chunk_size, BTRFS_BLOCK_GROUP_DATA); if (ret == -ENOSPC) { fprintf(stderr, "no space to alloc data chunk\n"); goto err; } BUG_ON(ret); ret = btrfs_make_block_group(trans, root, 0, BTRFS_BLOCK_GROUP_DATA, BTRFS_FIRST_CHUNK_TREE_OBJECTID, chunk_start, chunk_size); BUG_ON(ret); } ret = btrfs_make_root_dir(trans, root->fs_info->tree_root, BTRFS_ROOT_TREE_DIR_OBJECTID); if (ret) goto err; ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID); if (ret) goto err; memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location)); location.offset = (u64)-1; ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root, "default", 7, btrfs_super_root_dir(root->fs_info->super_copy), &location, BTRFS_FT_DIR, 0); if (ret) goto err; ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root, "default", 7, location.objectid, BTRFS_ROOT_TREE_DIR_OBJECTID, 0); if (ret) goto err; btrfs_commit_transaction(trans, root); err: return ret; }