diff options
author | Chris Mason <chris.mason@oracle.com> | 2007-03-21 11:12:56 -0400 |
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committer | David Woodhouse <dwmw2@hera.kernel.org> | 2007-03-21 11:12:56 -0400 |
commit | 2e635a278354a1a7951e16cfea4c247d6d0e7c99 (patch) | |
tree | 4b94d54ddcd7cb184681260738b68caef4edee81 /fs/btrfs/mkfs.c | |
parent | 1261ec42b3d3a3ad878bd172144940e3ac710749 (diff) |
Btrfs: initial move to kernel module land
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/mkfs.c')
-rw-r--r-- | fs/btrfs/mkfs.c | 255 |
1 files changed, 0 insertions, 255 deletions
diff --git a/fs/btrfs/mkfs.c b/fs/btrfs/mkfs.c deleted file mode 100644 index f7efc8a5fb1..00000000000 --- a/fs/btrfs/mkfs.c +++ /dev/null @@ -1,255 +0,0 @@ -#define _XOPEN_SOURCE 500 -#ifndef __CHECKER__ -#include <sys/ioctl.h> -#include <sys/mount.h> -#endif -#include <stdio.h> -#include <stdlib.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <unistd.h> -#include "kerncompat.h" -#include "radix-tree.h" -#include "ctree.h" -#include "disk-io.h" - -#ifdef __CHECKER__ -#define BLKGETSIZE64 0 -static inline int ioctl(int fd, int define, u64 *size) { return 0; } -#endif - -#if 0 -#if defined(__linux__) && defined(_IOR) && !defined(BLKGETSIZE64) -# define BLKGETSIZE64 _IOR(0x12, 114, __u64) -#endif -#endif - -int mkfs(int fd, u64 num_blocks, u32 blocksize) -{ - struct btrfs_super_block super; - struct btrfs_leaf *empty_leaf; - struct btrfs_root_item root_item; - struct btrfs_item item; - struct btrfs_extent_item extent_item; - char *block; - int ret; - u32 itemoff; - u32 start_block = BTRFS_SUPER_INFO_OFFSET / blocksize; - - btrfs_set_super_blocknr(&super, start_block); - btrfs_set_super_root(&super, start_block + 1); - strcpy((char *)(&super.magic), BTRFS_MAGIC); - btrfs_set_super_blocksize(&super, blocksize); - btrfs_set_super_total_blocks(&super, num_blocks); - btrfs_set_super_blocks_used(&super, start_block + 5); - - block = malloc(blocksize); - memset(block, 0, blocksize); - BUG_ON(sizeof(super) > blocksize); - memcpy(block, &super, sizeof(super)); - ret = pwrite(fd, block, blocksize, BTRFS_SUPER_INFO_OFFSET); - BUG_ON(ret != blocksize); - - /* create the tree of root objects */ - empty_leaf = malloc(blocksize); - memset(empty_leaf, 0, blocksize); - btrfs_set_header_parentid(&empty_leaf->header, - BTRFS_ROOT_TREE_OBJECTID); - btrfs_set_header_blocknr(&empty_leaf->header, start_block + 1); - btrfs_set_header_nritems(&empty_leaf->header, 3); - - /* create the items for the root tree */ - btrfs_set_root_blocknr(&root_item, start_block + 2); - btrfs_set_root_refs(&root_item, 1); - itemoff = __BTRFS_LEAF_DATA_SIZE(blocksize) - sizeof(root_item); - btrfs_set_item_offset(&item, itemoff); - btrfs_set_item_size(&item, sizeof(root_item)); - btrfs_set_disk_key_objectid(&item.key, BTRFS_EXTENT_TREE_OBJECTID); - btrfs_set_disk_key_offset(&item.key, 0); - btrfs_set_disk_key_flags(&item.key, 0); - btrfs_set_disk_key_type(&item.key, BTRFS_ROOT_ITEM_KEY); - memcpy(empty_leaf->items, &item, sizeof(item)); - memcpy(btrfs_leaf_data(empty_leaf) + itemoff, - &root_item, sizeof(root_item)); - - btrfs_set_root_blocknr(&root_item, start_block + 3); - itemoff = itemoff - sizeof(root_item); - btrfs_set_item_offset(&item, itemoff); - btrfs_set_disk_key_objectid(&item.key, BTRFS_INODE_MAP_OBJECTID); - memcpy(empty_leaf->items + 1, &item, sizeof(item)); - memcpy(btrfs_leaf_data(empty_leaf) + itemoff, - &root_item, sizeof(root_item)); - - btrfs_set_root_blocknr(&root_item, start_block + 4); - itemoff = itemoff - sizeof(root_item); - btrfs_set_item_offset(&item, itemoff); - btrfs_set_disk_key_objectid(&item.key, BTRFS_FS_TREE_OBJECTID); - memcpy(empty_leaf->items + 2, &item, sizeof(item)); - memcpy(btrfs_leaf_data(empty_leaf) + itemoff, - &root_item, sizeof(root_item)); - ret = pwrite(fd, empty_leaf, blocksize, (start_block + 1) * blocksize); - - /* create the items for the extent tree */ - btrfs_set_header_parentid(&empty_leaf->header, - BTRFS_EXTENT_TREE_OBJECTID); - btrfs_set_header_blocknr(&empty_leaf->header, start_block + 2); - btrfs_set_header_nritems(&empty_leaf->header, 5); - - /* item1, reserve blocks 0-16 */ - btrfs_set_disk_key_objectid(&item.key, 0); - btrfs_set_disk_key_offset(&item.key, start_block + 1); - btrfs_set_disk_key_flags(&item.key, 0); - btrfs_set_disk_key_type(&item.key, BTRFS_EXTENT_ITEM_KEY); - itemoff = __BTRFS_LEAF_DATA_SIZE(blocksize) - - sizeof(struct btrfs_extent_item); - btrfs_set_item_offset(&item, itemoff); - btrfs_set_item_size(&item, sizeof(struct btrfs_extent_item)); - btrfs_set_extent_refs(&extent_item, 1); - btrfs_set_extent_owner(&extent_item, 0); - memcpy(empty_leaf->items, &item, sizeof(item)); - memcpy(btrfs_leaf_data(empty_leaf) + btrfs_item_offset(&item), - &extent_item, btrfs_item_size(&item)); - - /* item2, give block 17 to the root */ - btrfs_set_disk_key_objectid(&item.key, start_block + 1); - btrfs_set_disk_key_offset(&item.key, 1); - itemoff = itemoff - sizeof(struct btrfs_extent_item); - btrfs_set_item_offset(&item, itemoff); - btrfs_set_extent_owner(&extent_item, BTRFS_ROOT_TREE_OBJECTID); - memcpy(empty_leaf->items + 1, &item, sizeof(item)); - memcpy(btrfs_leaf_data(empty_leaf) + btrfs_item_offset(&item), - &extent_item, btrfs_item_size(&item)); - - /* item3, give block 18 to the extent root */ - btrfs_set_disk_key_objectid(&item.key, start_block + 2); - btrfs_set_disk_key_offset(&item.key, 1); - itemoff = itemoff - sizeof(struct btrfs_extent_item); - btrfs_set_item_offset(&item, itemoff); - btrfs_set_extent_owner(&extent_item, BTRFS_EXTENT_TREE_OBJECTID); - memcpy(empty_leaf->items + 2, &item, sizeof(item)); - memcpy(btrfs_leaf_data(empty_leaf) + btrfs_item_offset(&item), - &extent_item, btrfs_item_size(&item)); - - /* item4, give block 19 to the inode map */ - btrfs_set_disk_key_objectid(&item.key, start_block + 3); - btrfs_set_disk_key_offset(&item.key, 1); - itemoff = itemoff - sizeof(struct btrfs_extent_item); - btrfs_set_item_offset(&item, itemoff); - btrfs_set_extent_owner(&extent_item, BTRFS_INODE_MAP_OBJECTID); - memcpy(empty_leaf->items + 3, &item, sizeof(item)); - memcpy(btrfs_leaf_data(empty_leaf) + btrfs_item_offset(&item), - &extent_item, btrfs_item_size(&item)); - ret = pwrite(fd, empty_leaf, blocksize, (start_block + 2) * blocksize); - if (ret != blocksize) - return -1; - - /* item5, give block 20 to the FS root */ - btrfs_set_disk_key_objectid(&item.key, start_block + 4); - btrfs_set_disk_key_offset(&item.key, 1); - itemoff = itemoff - sizeof(struct btrfs_extent_item); - btrfs_set_item_offset(&item, itemoff); - btrfs_set_extent_owner(&extent_item, BTRFS_FS_TREE_OBJECTID); - memcpy(empty_leaf->items + 4, &item, sizeof(item)); - memcpy(btrfs_leaf_data(empty_leaf) + btrfs_item_offset(&item), - &extent_item, btrfs_item_size(&item)); - ret = pwrite(fd, empty_leaf, blocksize, (start_block + 2) * blocksize); - if (ret != blocksize) - return -1; - - /* create the inode map */ - btrfs_set_header_parentid(&empty_leaf->header, - BTRFS_INODE_MAP_OBJECTID); - btrfs_set_header_blocknr(&empty_leaf->header, start_block + 3); - btrfs_set_header_nritems(&empty_leaf->header, 0); - ret = pwrite(fd, empty_leaf, blocksize, (start_block + 3) * blocksize); - if (ret != blocksize) - return -1; - - /* finally create the FS root */ - btrfs_set_header_parentid(&empty_leaf->header, BTRFS_FS_TREE_OBJECTID); - btrfs_set_header_blocknr(&empty_leaf->header, start_block + 4); - btrfs_set_header_nritems(&empty_leaf->header, 0); - ret = pwrite(fd, empty_leaf, blocksize, (start_block + 4) * blocksize); - if (ret != blocksize) - return -1; - return 0; -} - -u64 device_size(int fd, struct stat *st) -{ - u64 size; - if (S_ISREG(st->st_mode)) { - return st->st_size; - } - if (!S_ISBLK(st->st_mode)) { - return 0; - } - if (ioctl(fd, BLKGETSIZE64, &size) >= 0) { - return size; - } - return 0; -} - -int main(int ac, char **av) -{ - char *file; - u64 block_count = 0; - int fd; - struct stat st; - int ret; - int i; - char *buf = malloc(4096); - if (ac >= 2) { - file = av[1]; - if (ac == 3) { - block_count = atoi(av[2]); - if (!block_count) { - fprintf(stderr, "error finding block count\n"); - exit(1); - } - } - } else { - fprintf(stderr, "usage: mkfs.btrfs file [block count]\n"); - exit(1); - } - fd = open(file, O_RDWR); - if (fd < 0) { - fprintf(stderr, "unable to open %s\n", file); - exit(1); - } - ret = fstat(fd, &st); - if (ret < 0) { - fprintf(stderr, "unable to stat %s\n", file); - exit(1); - } - if (block_count == 0) { - block_count = device_size(fd, &st); - if (block_count == 0) { - fprintf(stderr, "unable to find %s size\n", file); - exit(1); - } - } - block_count /= 4096; - if (block_count < 256) { - fprintf(stderr, "device %s is too small\n", file); - exit(1); - } - memset(buf, 0, 4096); - for(i = 0; i < 6; i++) { - ret = write(fd, buf, 4096); - if (ret != 4096) { - fprintf(stderr, "unable to zero fill device\n"); - exit(1); - } - } - ret = mkfs(fd, block_count, 4096); - if (ret) { - fprintf(stderr, "error during mkfs %d\n", ret); - exit(1); - } - printf("fs created on %s blocksize %d blocks %Lu\n", - file, 4096, block_count); - return 0; -} - |