forked from Mirrors/btrfs-progs
btrfs-progs: mkfs: move common api implementation to own file
Signed-off-by: David Sterba <dsterba@suse.com>master
David Sterba
parent
5f276edfda
commit
ef9ddf7a5c
10
Makefile.in
10
Makefile.in
|
|
@ -374,13 +374,15 @@ btrfsck.static: btrfs.static
|
|||
@echo " [LN] $@"
|
||||
$(Q)$(LN_S) -f $^ $@
|
||||
|
||||
mkfs.btrfs: $(objects) $(libs_static) mkfs/main.o
|
||||
mkfs.btrfs: $(objects) $(libs_static) mkfs/main.o mkfs/common.o
|
||||
@echo " [LD] $@"
|
||||
$(Q)$(CC) $(CFLAGS) -o mkfs.btrfs $(objects) $(libs_static) mkfs/main.o $(LDFLAGS) $(LIBS)
|
||||
$(Q)$(CC) $(CFLAGS) -o mkfs.btrfs $(objects) $(libs_static) \
|
||||
mkfs/main.o mkfs/common.o $(LDFLAGS) $(LIBS)
|
||||
|
||||
mkfs.btrfs.static: $(static_objects) mkfs/main.static.o $(static_libbtrfs_objects)
|
||||
mkfs.btrfs.static: $(static_objects) mkfs/main.static.o mkfs/common.static.o $(static_libbtrfs_objects)
|
||||
@echo " [LD] $@"
|
||||
$(Q)$(CC) $(STATIC_CFLAGS) -o mkfs.btrfs.static mkfs/main.static.o $(static_objects) \
|
||||
$(Q)$(CC) $(STATIC_CFLAGS) -o mkfs.btrfs.static \
|
||||
mkfs/main.static.o mkfs/common.static.o $(static_objects) \
|
||||
$(static_libbtrfs_objects) $(STATIC_LDFLAGS) $(STATIC_LIBS)
|
||||
|
||||
btrfstune: $(objects) $(libs_static) btrfstune.o
|
||||
|
|
|
|||
|
|
@ -0,0 +1,439 @@
|
|||
/*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public
|
||||
* License v2 as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public
|
||||
* License along with this program; if not, write to the
|
||||
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||||
* Boston, MA 021110-1307, USA.
|
||||
*/
|
||||
|
||||
#include <unistd.h>
|
||||
#include <uuid/uuid.h>
|
||||
#include "ctree.h"
|
||||
#include "disk-io.h"
|
||||
#include "volumes.h"
|
||||
#include "utils.h"
|
||||
#include "mkfs/common.h"
|
||||
|
||||
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,
|
||||
};
|
||||
|
||||
/*
|
||||
* @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;
|
||||
}
|
||||
|
||||
415
utils.c
415
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)
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue