btrfs-progs: mkfs: move common api implementation to own file

Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 0 insertions, 415 deletions

diff --git a/utils.c b/utils.c
index 76e8bf05..a4bc213e 100644
--- a/utils.c
+++ b/utils.c
@@ -96,15 +96,6 @@ static int discard_blocks(int fd, u64 start, u64 len)
 	return 0;
 }
 
-static u64 reference_root_table[] = {
-	[1] =	BTRFS_ROOT_TREE_OBJECTID,
-	[2] =	BTRFS_EXTENT_TREE_OBJECTID,
-	[3] =	BTRFS_CHUNK_TREE_OBJECTID,
-	[4] =	BTRFS_DEV_TREE_OBJECTID,
-	[5] =	BTRFS_FS_TREE_OBJECTID,
-	[6] =	BTRFS_CSUM_TREE_OBJECTID,
-};
-
 int test_uuid_unique(char *fs_uuid)
 {
 	int unique = 1;
@@ -997,412 +988,6 @@ out:
 	return ret;
 }
 
-/*
- * @fs_uuid - if NULL, generates a UUID, returns back the new filesystem UUID
- *
- * The superblock signature is not valid, denotes a partially created
- * filesystem, needs to be finalized.
- */
-int make_btrfs(int fd, struct btrfs_mkfs_config *cfg)
-{
-	struct btrfs_super_block super;
-	struct extent_buffer *buf;
-	struct btrfs_root_item root_item;
-	struct btrfs_disk_key disk_key;
-	struct btrfs_extent_item *extent_item;
-	struct btrfs_inode_item *inode_item;
-	struct btrfs_chunk *chunk;
-	struct btrfs_dev_item *dev_item;
-	struct btrfs_dev_extent *dev_extent;
-	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
-	u8 *ptr;
-	int i;
-	int ret;
-	u32 itemoff;
-	u32 nritems = 0;
-	u64 first_free;
-	u64 ref_root;
-	u32 array_size;
-	u32 item_size;
-	int skinny_metadata = !!(cfg->features &
-				 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA);
-	u64 num_bytes;
-
-	buf = malloc(sizeof(*buf) + max(cfg->sectorsize, cfg->nodesize));
-	if (!buf)
-		return -ENOMEM;
-
-	first_free = BTRFS_SUPER_INFO_OFFSET + cfg->sectorsize * 2 - 1;
-	first_free &= ~((u64)cfg->sectorsize - 1);
-
-	memset(&super, 0, sizeof(super));
-
-	num_bytes = (cfg->num_bytes / cfg->sectorsize) * cfg->sectorsize;
-	if (*cfg->fs_uuid) {
-		if (uuid_parse(cfg->fs_uuid, super.fsid) != 0) {
-			error("cannot not parse UUID: %s", cfg->fs_uuid);
-			ret = -EINVAL;
-			goto out;
-		}
-		if (!test_uuid_unique(cfg->fs_uuid)) {
-			error("non-unique UUID: %s", cfg->fs_uuid);
-			ret = -EBUSY;
-			goto out;
-		}
-	} else {
-		uuid_generate(super.fsid);
-		uuid_unparse(super.fsid, cfg->fs_uuid);
-	}
-	uuid_generate(super.dev_item.uuid);
-	uuid_generate(chunk_tree_uuid);
-
-	btrfs_set_super_bytenr(&super, cfg->blocks[0]);
-	btrfs_set_super_num_devices(&super, 1);
-	btrfs_set_super_magic(&super, BTRFS_MAGIC_PARTIAL);
-	btrfs_set_super_generation(&super, 1);
-	btrfs_set_super_root(&super, cfg->blocks[1]);
-	btrfs_set_super_chunk_root(&super, cfg->blocks[3]);
-	btrfs_set_super_total_bytes(&super, num_bytes);
-	btrfs_set_super_bytes_used(&super, 6 * cfg->nodesize);
-	btrfs_set_super_sectorsize(&super, cfg->sectorsize);
-	btrfs_set_super_leafsize(&super, cfg->nodesize);
-	btrfs_set_super_nodesize(&super, cfg->nodesize);
-	btrfs_set_super_stripesize(&super, cfg->stripesize);
-	btrfs_set_super_csum_type(&super, BTRFS_CSUM_TYPE_CRC32);
-	btrfs_set_super_chunk_root_generation(&super, 1);
-	btrfs_set_super_cache_generation(&super, -1);
-	btrfs_set_super_incompat_flags(&super, cfg->features);
-	if (cfg->label)
-		__strncpy_null(super.label, cfg->label, BTRFS_LABEL_SIZE - 1);
-
-	/* create the tree of root objects */
-	memset(buf->data, 0, cfg->nodesize);
-	buf->len = cfg->nodesize;
-	btrfs_set_header_bytenr(buf, cfg->blocks[1]);
-	btrfs_set_header_nritems(buf, 4);
-	btrfs_set_header_generation(buf, 1);
-	btrfs_set_header_backref_rev(buf, BTRFS_MIXED_BACKREF_REV);
-	btrfs_set_header_owner(buf, BTRFS_ROOT_TREE_OBJECTID);
-	write_extent_buffer(buf, super.fsid, btrfs_header_fsid(),
-			    BTRFS_FSID_SIZE);
-
-	write_extent_buffer(buf, chunk_tree_uuid,
-			    btrfs_header_chunk_tree_uuid(buf),
-			    BTRFS_UUID_SIZE);
-
-	/* create the items for the root tree */
-	memset(&root_item, 0, sizeof(root_item));
-	inode_item = &root_item.inode;
-	btrfs_set_stack_inode_generation(inode_item, 1);
-	btrfs_set_stack_inode_size(inode_item, 3);
-	btrfs_set_stack_inode_nlink(inode_item, 1);
-	btrfs_set_stack_inode_nbytes(inode_item, cfg->nodesize);
-	btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755);
-	btrfs_set_root_refs(&root_item, 1);
-	btrfs_set_root_used(&root_item, cfg->nodesize);
-	btrfs_set_root_generation(&root_item, 1);
-
-	memset(&disk_key, 0, sizeof(disk_key));
-	btrfs_set_disk_key_type(&disk_key, BTRFS_ROOT_ITEM_KEY);
-	btrfs_set_disk_key_offset(&disk_key, 0);
-	nritems = 0;
-
-	itemoff = __BTRFS_LEAF_DATA_SIZE(cfg->nodesize) - sizeof(root_item);
-	btrfs_set_root_bytenr(&root_item, cfg->blocks[2]);
-	btrfs_set_disk_key_objectid(&disk_key, BTRFS_EXTENT_TREE_OBJECTID);
-	btrfs_set_item_key(buf, &disk_key, nritems);
-	btrfs_set_item_offset(buf, btrfs_item_nr(nritems), itemoff);
-	btrfs_set_item_size(buf, btrfs_item_nr(nritems),
-			    sizeof(root_item));
-	write_extent_buffer(buf, &root_item, btrfs_item_ptr_offset(buf,
-			    nritems), sizeof(root_item));
-	nritems++;
-
-	itemoff = itemoff - sizeof(root_item);
-	btrfs_set_root_bytenr(&root_item, cfg->blocks[4]);
-	btrfs_set_disk_key_objectid(&disk_key, BTRFS_DEV_TREE_OBJECTID);
-	btrfs_set_item_key(buf, &disk_key, nritems);
-	btrfs_set_item_offset(buf, btrfs_item_nr(nritems), itemoff);
-	btrfs_set_item_size(buf, btrfs_item_nr(nritems),
-			    sizeof(root_item));
-	write_extent_buffer(buf, &root_item,
-			    btrfs_item_ptr_offset(buf, nritems),
-			    sizeof(root_item));
-	nritems++;
-
-	itemoff = itemoff - sizeof(root_item);
-	btrfs_set_root_bytenr(&root_item, cfg->blocks[5]);
-	btrfs_set_disk_key_objectid(&disk_key, BTRFS_FS_TREE_OBJECTID);
-	btrfs_set_item_key(buf, &disk_key, nritems);
-	btrfs_set_item_offset(buf, btrfs_item_nr(nritems), itemoff);
-	btrfs_set_item_size(buf, btrfs_item_nr(nritems),
-			    sizeof(root_item));
-	write_extent_buffer(buf, &root_item,
-			    btrfs_item_ptr_offset(buf, nritems),
-			    sizeof(root_item));
-	nritems++;
-
-	itemoff = itemoff - sizeof(root_item);
-	btrfs_set_root_bytenr(&root_item, cfg->blocks[6]);
-	btrfs_set_disk_key_objectid(&disk_key, BTRFS_CSUM_TREE_OBJECTID);
-	btrfs_set_item_key(buf, &disk_key, nritems);
-	btrfs_set_item_offset(buf, btrfs_item_nr(nritems), itemoff);
-	btrfs_set_item_size(buf, btrfs_item_nr(nritems),
-			    sizeof(root_item));
-	write_extent_buffer(buf, &root_item,
-			    btrfs_item_ptr_offset(buf, nritems),
-			    sizeof(root_item));
-	nritems++;
-
-
-	csum_tree_block_size(buf, BTRFS_CRC32_SIZE, 0);
-	ret = pwrite(fd, buf->data, cfg->nodesize, cfg->blocks[1]);
-	if (ret != cfg->nodesize) {
-		ret = (ret < 0 ? -errno : -EIO);
-		goto out;
-	}
-
-	/* create the items for the extent tree */
-	memset(buf->data + sizeof(struct btrfs_header), 0,
-		cfg->nodesize - sizeof(struct btrfs_header));
-	nritems = 0;
-	itemoff = __BTRFS_LEAF_DATA_SIZE(cfg->nodesize);
-	for (i = 1; i < 7; i++) {
-		item_size = sizeof(struct btrfs_extent_item);
-		if (!skinny_metadata)
-			item_size += sizeof(struct btrfs_tree_block_info);
-
-		if (cfg->blocks[i] < first_free) {
-			error("block[%d] below first free: %llu < %llu",
-					i, (unsigned long long)cfg->blocks[i],
-					(unsigned long long)first_free);
-			ret = -EINVAL;
-			goto out;
-		}
-		if (cfg->blocks[i] < cfg->blocks[i - 1]) {
-			error("blocks %d and %d in reverse order: %llu < %llu",
-				i, i - 1,
-				(unsigned long long)cfg->blocks[i],
-				(unsigned long long)cfg->blocks[i - 1]);
-			ret = -EINVAL;
-			goto out;
-		}
-
-		/* create extent item */
-		itemoff -= item_size;
-		btrfs_set_disk_key_objectid(&disk_key, cfg->blocks[i]);
-		if (skinny_metadata) {
-			btrfs_set_disk_key_type(&disk_key,
-						BTRFS_METADATA_ITEM_KEY);
-			btrfs_set_disk_key_offset(&disk_key, 0);
-		} else {
-			btrfs_set_disk_key_type(&disk_key,
-						BTRFS_EXTENT_ITEM_KEY);
-			btrfs_set_disk_key_offset(&disk_key, cfg->nodesize);
-		}
-		btrfs_set_item_key(buf, &disk_key, nritems);
-		btrfs_set_item_offset(buf, btrfs_item_nr(nritems),
-				      itemoff);
-		btrfs_set_item_size(buf, btrfs_item_nr(nritems),
-				    item_size);
-		extent_item = btrfs_item_ptr(buf, nritems,
-					     struct btrfs_extent_item);
-		btrfs_set_extent_refs(buf, extent_item, 1);
-		btrfs_set_extent_generation(buf, extent_item, 1);
-		btrfs_set_extent_flags(buf, extent_item,
-				       BTRFS_EXTENT_FLAG_TREE_BLOCK);
-		nritems++;
-
-		/* create extent ref */
-		ref_root = reference_root_table[i];
-		btrfs_set_disk_key_objectid(&disk_key, cfg->blocks[i]);
-		btrfs_set_disk_key_offset(&disk_key, ref_root);
-		btrfs_set_disk_key_type(&disk_key, BTRFS_TREE_BLOCK_REF_KEY);
-		btrfs_set_item_key(buf, &disk_key, nritems);
-		btrfs_set_item_offset(buf, btrfs_item_nr(nritems),
-				      itemoff);
-		btrfs_set_item_size(buf, btrfs_item_nr(nritems), 0);
-		nritems++;
-	}
-	btrfs_set_header_bytenr(buf, cfg->blocks[2]);
-	btrfs_set_header_owner(buf, BTRFS_EXTENT_TREE_OBJECTID);
-	btrfs_set_header_nritems(buf, nritems);
-	csum_tree_block_size(buf, BTRFS_CRC32_SIZE, 0);
-	ret = pwrite(fd, buf->data, cfg->nodesize, cfg->blocks[2]);
-	if (ret != cfg->nodesize) {
-		ret = (ret < 0 ? -errno : -EIO);
-		goto out;
-	}
-
-	/* create the chunk tree */
-	memset(buf->data + sizeof(struct btrfs_header), 0,
-		cfg->nodesize - sizeof(struct btrfs_header));
-	nritems = 0;
-	item_size = sizeof(*dev_item);
-	itemoff = __BTRFS_LEAF_DATA_SIZE(cfg->nodesize) - item_size;
-
-	/* first device 1 (there is no device 0) */
-	btrfs_set_disk_key_objectid(&disk_key, BTRFS_DEV_ITEMS_OBJECTID);
-	btrfs_set_disk_key_offset(&disk_key, 1);
-	btrfs_set_disk_key_type(&disk_key, BTRFS_DEV_ITEM_KEY);
-	btrfs_set_item_key(buf, &disk_key, nritems);
-	btrfs_set_item_offset(buf, btrfs_item_nr(nritems), itemoff);
-	btrfs_set_item_size(buf, btrfs_item_nr(nritems), item_size);
-
-	dev_item = btrfs_item_ptr(buf, nritems, struct btrfs_dev_item);
-	btrfs_set_device_id(buf, dev_item, 1);
-	btrfs_set_device_generation(buf, dev_item, 0);
-	btrfs_set_device_total_bytes(buf, dev_item, num_bytes);
-	btrfs_set_device_bytes_used(buf, dev_item,
-				    BTRFS_MKFS_SYSTEM_GROUP_SIZE);
-	btrfs_set_device_io_align(buf, dev_item, cfg->sectorsize);
-	btrfs_set_device_io_width(buf, dev_item, cfg->sectorsize);
-	btrfs_set_device_sector_size(buf, dev_item, cfg->sectorsize);
-	btrfs_set_device_type(buf, dev_item, 0);
-
-	write_extent_buffer(buf, super.dev_item.uuid,
-			    (unsigned long)btrfs_device_uuid(dev_item),
-			    BTRFS_UUID_SIZE);
-	write_extent_buffer(buf, super.fsid,
-			    (unsigned long)btrfs_device_fsid(dev_item),
-			    BTRFS_UUID_SIZE);
-	read_extent_buffer(buf, &super.dev_item, (unsigned long)dev_item,
-			   sizeof(*dev_item));
-
-	nritems++;
-	item_size = btrfs_chunk_item_size(1);
-	itemoff = itemoff - item_size;
-
-	/* then we have chunk 0 */
-	btrfs_set_disk_key_objectid(&disk_key, BTRFS_FIRST_CHUNK_TREE_OBJECTID);
-	btrfs_set_disk_key_offset(&disk_key, 0);
-	btrfs_set_disk_key_type(&disk_key, BTRFS_CHUNK_ITEM_KEY);
-	btrfs_set_item_key(buf, &disk_key, nritems);
-	btrfs_set_item_offset(buf, btrfs_item_nr(nritems), itemoff);
-	btrfs_set_item_size(buf, btrfs_item_nr(nritems), item_size);
-
-	chunk = btrfs_item_ptr(buf, nritems, struct btrfs_chunk);
-	btrfs_set_chunk_length(buf, chunk, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
-	btrfs_set_chunk_owner(buf, chunk, BTRFS_EXTENT_TREE_OBJECTID);
-	btrfs_set_chunk_stripe_len(buf, chunk, BTRFS_STRIPE_LEN);
-	btrfs_set_chunk_type(buf, chunk, BTRFS_BLOCK_GROUP_SYSTEM);
-	btrfs_set_chunk_io_align(buf, chunk, cfg->sectorsize);
-	btrfs_set_chunk_io_width(buf, chunk, cfg->sectorsize);
-	btrfs_set_chunk_sector_size(buf, chunk, cfg->sectorsize);
-	btrfs_set_chunk_num_stripes(buf, chunk, 1);
-	btrfs_set_stripe_devid_nr(buf, chunk, 0, 1);
-	btrfs_set_stripe_offset_nr(buf, chunk, 0, 0);
-	nritems++;
-
-	write_extent_buffer(buf, super.dev_item.uuid,
-			    (unsigned long)btrfs_stripe_dev_uuid(&chunk->stripe),
-			    BTRFS_UUID_SIZE);
-
-	/* copy the key for the chunk to the system array */
-	ptr = super.sys_chunk_array;
-	array_size = sizeof(disk_key);
-
-	memcpy(ptr, &disk_key, sizeof(disk_key));
-	ptr += sizeof(disk_key);
-
-	/* copy the chunk to the system array */
-	read_extent_buffer(buf, ptr, (unsigned long)chunk, item_size);
-	array_size += item_size;
-	ptr += item_size;
-	btrfs_set_super_sys_array_size(&super, array_size);
-
-	btrfs_set_header_bytenr(buf, cfg->blocks[3]);
-	btrfs_set_header_owner(buf, BTRFS_CHUNK_TREE_OBJECTID);
-	btrfs_set_header_nritems(buf, nritems);
-	csum_tree_block_size(buf, BTRFS_CRC32_SIZE, 0);
-	ret = pwrite(fd, buf->data, cfg->nodesize, cfg->blocks[3]);
-	if (ret != cfg->nodesize) {
-		ret = (ret < 0 ? -errno : -EIO);
-		goto out;
-	}
-
-	/* create the device tree */
-	memset(buf->data + sizeof(struct btrfs_header), 0,
-		cfg->nodesize - sizeof(struct btrfs_header));
-	nritems = 0;
-	itemoff = __BTRFS_LEAF_DATA_SIZE(cfg->nodesize) -
-		sizeof(struct btrfs_dev_extent);
-
-	btrfs_set_disk_key_objectid(&disk_key, 1);
-	btrfs_set_disk_key_offset(&disk_key, 0);
-	btrfs_set_disk_key_type(&disk_key, BTRFS_DEV_EXTENT_KEY);
-	btrfs_set_item_key(buf, &disk_key, nritems);
-	btrfs_set_item_offset(buf, btrfs_item_nr(nritems), itemoff);
-	btrfs_set_item_size(buf, btrfs_item_nr(nritems),
-			    sizeof(struct btrfs_dev_extent));
-	dev_extent = btrfs_item_ptr(buf, nritems, struct btrfs_dev_extent);
-	btrfs_set_dev_extent_chunk_tree(buf, dev_extent,
-					BTRFS_CHUNK_TREE_OBJECTID);
-	btrfs_set_dev_extent_chunk_objectid(buf, dev_extent,
-					BTRFS_FIRST_CHUNK_TREE_OBJECTID);
-	btrfs_set_dev_extent_chunk_offset(buf, dev_extent, 0);
-
-	write_extent_buffer(buf, chunk_tree_uuid,
-		    (unsigned long)btrfs_dev_extent_chunk_tree_uuid(dev_extent),
-		    BTRFS_UUID_SIZE);
-
-	btrfs_set_dev_extent_length(buf, dev_extent,
-				    BTRFS_MKFS_SYSTEM_GROUP_SIZE);
-	nritems++;
-
-	btrfs_set_header_bytenr(buf, cfg->blocks[4]);
-	btrfs_set_header_owner(buf, BTRFS_DEV_TREE_OBJECTID);
-	btrfs_set_header_nritems(buf, nritems);
-	csum_tree_block_size(buf, BTRFS_CRC32_SIZE, 0);
-	ret = pwrite(fd, buf->data, cfg->nodesize, cfg->blocks[4]);
-	if (ret != cfg->nodesize) {
-		ret = (ret < 0 ? -errno : -EIO);
-		goto out;
-	}
-
-	/* create the FS root */
-	memset(buf->data + sizeof(struct btrfs_header), 0,
-		cfg->nodesize - sizeof(struct btrfs_header));
-	btrfs_set_header_bytenr(buf, cfg->blocks[5]);
-	btrfs_set_header_owner(buf, BTRFS_FS_TREE_OBJECTID);
-	btrfs_set_header_nritems(buf, 0);
-	csum_tree_block_size(buf, BTRFS_CRC32_SIZE, 0);
-	ret = pwrite(fd, buf->data, cfg->nodesize, cfg->blocks[5]);
-	if (ret != cfg->nodesize) {
-		ret = (ret < 0 ? -errno : -EIO);
-		goto out;
-	}
-	/* finally create the csum root */
-	memset(buf->data + sizeof(struct btrfs_header), 0,
-		cfg->nodesize - sizeof(struct btrfs_header));
-	btrfs_set_header_bytenr(buf, cfg->blocks[6]);
-	btrfs_set_header_owner(buf, BTRFS_CSUM_TREE_OBJECTID);
-	btrfs_set_header_nritems(buf, 0);
-	csum_tree_block_size(buf, BTRFS_CRC32_SIZE, 0);
-	ret = pwrite(fd, buf->data, cfg->nodesize, cfg->blocks[6]);
-	if (ret != cfg->nodesize) {
-		ret = (ret < 0 ? -errno : -EIO);
-		goto out;
-	}
-
-	/* and write out the super block */
-	memset(buf->data, 0, BTRFS_SUPER_INFO_SIZE);
-	memcpy(buf->data, &super, sizeof(super));
-	buf->len = BTRFS_SUPER_INFO_SIZE;
-	csum_tree_block_size(buf, BTRFS_CRC32_SIZE, 0);
-	ret = pwrite(fd, buf->data, BTRFS_SUPER_INFO_SIZE, cfg->blocks[0]);
-	if (ret != BTRFS_SUPER_INFO_SIZE) {
-		ret = (ret < 0 ? -errno : -EIO);
-		goto out;
-	}
-
-	ret = 0;
-
-out:
-	free(buf);
-	return ret;
-}
-
 #define VERSION_TO_STRING3(a,b,c)	#a "." #b "." #c, KERNEL_VERSION(a,b,c)
 #define VERSION_TO_STRING2(a,b)		#a "." #b, KERNEL_VERSION(a,b,0)