diff options
Diffstat (limited to 'mkfs.c')
| -rw-r--r-- | mkfs.c | 74 |
1 files changed, 69 insertions, 5 deletions
@@ -13,17 +13,73 @@ #include "radix-tree.h" #include "ctree.h" #include "disk-io.h" +#include "transaction.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 +static int make_root_dir(int fd) { + struct btrfs_root *root; + struct btrfs_super_block super; + int ret; + char buf[8]; + u64 objectid; + struct btrfs_key inode_map; + struct btrfs_inode_item inode_item; + struct btrfs_trans_handle *trans; + + root = open_ctree_fd(fd, &super); + + if (!root) { + fprintf(stderr, "ctree init failed\n"); + return -1; + } + + buf[0] = '.'; + buf[1] = '.'; + + trans = btrfs_start_transaction(root, 1); + ret = btrfs_find_free_objectid(trans, root, 1, &objectid); + if (ret) + goto error; + + inode_map.objectid = objectid; + inode_map.flags = 0; + inode_map.offset = 0; + + ret = btrfs_insert_inode_map(trans, root, objectid, &inode_map); + if (ret) + goto error; + + memset(&inode_item, 0, sizeof(inode_item)); + btrfs_set_inode_generation(&inode_item, root->fs_info->generation); + btrfs_set_inode_size(&inode_item, 3); + btrfs_set_inode_nlink(&inode_item, 1); + btrfs_set_inode_nblocks(&inode_item, 1); + btrfs_set_inode_mode(&inode_item, S_IFDIR | 0711); + + btrfs_set_super_root_dir(&super, objectid); + + ret = btrfs_insert_inode(trans, root, objectid, &inode_item); + if (ret) + goto error; + ret = btrfs_insert_dir_item(trans, root, buf, 1, objectid, + objectid, 1); + if (ret) + goto error; + ret = btrfs_insert_dir_item(trans, root, buf, 2, objectid, + objectid, 1); + if (ret) + goto error; + ret = btrfs_commit_transaction(trans, root, &super); + if (ret) + goto error; + ret = close_ctree(root, &super); +error: + return ret; +} int mkfs(int fd, u64 num_blocks, u32 blocksize) { @@ -200,6 +256,9 @@ int main(int ac, char **av) int ret; int i; char *buf = malloc(4096); + + radix_tree_init(); + if (ac >= 2) { file = av[1]; if (ac == 3) { @@ -248,6 +307,11 @@ int main(int ac, char **av) fprintf(stderr, "error during mkfs %d\n", ret); exit(1); } + ret = make_root_dir(fd); + if (ret) { + fprintf(stderr, "failed to setup the root directory\n"); + exit(1); + } printf("fs created on %s blocksize %d blocks %Lu\n", file, 4096, block_count); return 0; |