2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #define _XOPEN_SOURCE 500
21 #include <sys/ioctl.h>
22 #include <sys/mount.h>
26 #include <sys/types.h>
30 #include <uuid/uuid.h>
33 #include "kerncompat.h"
36 #include "transaction.h"
40 #define BLKGETSIZE64 0
41 static inline int ioctl(int fd, int define, u64 *size) { return 0; }
44 static u64 parse_size(char *s)
50 if (!isdigit(s[len - 1])) {
51 c = tolower(s[len - 1]);
62 fprintf(stderr, "Unknown size descriptor %c\n", c);
67 return atol(s) * mult;
70 static int make_root_dir(int fd) {
71 struct btrfs_root *root;
72 struct btrfs_trans_handle *trans;
73 struct btrfs_key location;
76 root = open_ctree_fd(fd, 0);
79 fprintf(stderr, "ctree init failed\n");
82 trans = btrfs_start_transaction(root, 1);
83 ret = btrfs_make_block_groups(trans, root);
84 ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
85 BTRFS_ROOT_TREE_DIR_OBJECTID);
88 ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
91 memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
92 location.offset = (u64)-1;
93 ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
95 btrfs_super_root_dir(&root->fs_info->super_copy),
96 &location, BTRFS_FT_DIR);
100 ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
101 "default", 7, location.objectid,
102 BTRFS_ROOT_TREE_DIR_OBJECTID);
106 btrfs_commit_transaction(trans, root);
107 ret = close_ctree(root);
112 u64 device_size(int fd, struct stat *st)
115 if (S_ISREG(st->st_mode)) {
118 if (!S_ISBLK(st->st_mode)) {
121 if (ioctl(fd, BLKGETSIZE64, &size) >= 0) {
127 static void print_usage(void)
129 fprintf(stderr, "usage: mkfs.btrfs [ -l leafsize ] [ -n nodesize] dev [ blocks ]\n");
133 int main(int ac, char **av)
141 u32 leafsize = 16 * 1024;
142 u32 sectorsize = 4096;
143 u32 nodesize = 16 * 1024;
144 u32 stripesize = 4096;
146 char *buf = malloc(sectorsize);
150 c = getopt(ac, av, "l:n:s:");
155 leafsize = parse_size(optarg);
158 nodesize = parse_size(optarg);
161 stripesize = parse_size(optarg);
167 if (leafsize < sectorsize || (leafsize & (sectorsize - 1))) {
168 fprintf(stderr, "Illegal leafsize %u\n", leafsize);
171 if (nodesize < sectorsize || (nodesize & (sectorsize - 1))) {
172 fprintf(stderr, "Illegal nodesize %u\n", nodesize);
179 block_count = parse_size(av[optind + 1]);
181 fprintf(stderr, "error finding block count\n");
188 fd = open(file, O_RDWR);
190 fprintf(stderr, "unable to open %s\n", file);
193 ret = fstat(fd, &st);
195 fprintf(stderr, "unable to stat %s\n", file);
198 if (block_count == 0) {
199 block_count = device_size(fd, &st);
200 if (block_count == 0) {
201 fprintf(stderr, "unable to find %s size\n", file);
205 block_count /= sectorsize;
206 block_count *= sectorsize;
208 if (block_count < 256 * 1024 * 1024) {
209 fprintf(stderr, "device %s is too small\n", file);
212 memset(buf, 0, sectorsize);
213 for(i = 0; i < 64; i++) {
214 ret = write(fd, buf, sectorsize);
215 if (ret != sectorsize) {
216 fprintf(stderr, "unable to zero fill device\n");
220 for (i = 0; i < 4; i++)
221 blocks[i] = BTRFS_SUPER_INFO_OFFSET + leafsize * i;
222 ret = make_btrfs(fd, blocks, block_count, nodesize, leafsize,
223 sectorsize, stripesize);
225 fprintf(stderr, "error during mkfs %d\n", ret);
228 ret = make_root_dir(fd);
230 fprintf(stderr, "failed to setup the root directory\n");
233 printf("fs created on %s nodesize %u leafsize %u sectorsize %u bytes %llu\n",
234 file, nodesize, leafsize, sectorsize,
235 (unsigned long long)block_count);