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
23 #include <sys/types.h>
28 #include <uuid/uuid.h>
31 #include "kerncompat.h"
35 #include "transaction.h"
38 static u64 parse_size(char *s)
44 if (!isdigit(s[len - 1])) {
45 c = tolower(s[len - 1]);
56 fprintf(stderr, "Unknown size descriptor %c\n", c);
61 return atol(s) * mult;
64 static int make_root_dir(int fd, const char *device_name) {
65 struct btrfs_root *root;
66 struct btrfs_trans_handle *trans;
67 struct btrfs_key location;
73 root = open_ctree_fd(fd, device_name, 0);
76 fprintf(stderr, "ctree init failed\n");
79 trans = btrfs_start_transaction(root, 1);
80 bytes_used = btrfs_super_bytes_used(&root->fs_info->super_copy);
82 root->fs_info->system_allocs = 1;
83 ret = btrfs_make_block_group(trans, root, bytes_used,
84 BTRFS_BLOCK_GROUP_SYSTEM,
85 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
86 0, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
89 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
90 &chunk_start, &chunk_size,
91 BTRFS_BLOCK_GROUP_METADATA);
93 ret = btrfs_make_block_group(trans, root, 0,
94 BTRFS_BLOCK_GROUP_METADATA,
95 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
96 chunk_start, chunk_size);
99 root->fs_info->system_allocs = 0;
100 btrfs_commit_transaction(trans, root);
101 trans = btrfs_start_transaction(root, 1);
104 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
105 &chunk_start, &chunk_size,
106 BTRFS_BLOCK_GROUP_DATA);
108 ret = btrfs_make_block_group(trans, root, 0,
109 BTRFS_BLOCK_GROUP_DATA,
110 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
111 chunk_start, chunk_size);
114 // ret = btrfs_make_block_group(trans, root, 0, 1);
115 ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
116 BTRFS_ROOT_TREE_DIR_OBJECTID);
119 ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
122 memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
123 location.offset = (u64)-1;
124 ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
126 btrfs_super_root_dir(&root->fs_info->super_copy),
127 &location, BTRFS_FT_DIR);
131 ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
132 "default", 7, location.objectid,
133 BTRFS_ROOT_TREE_DIR_OBJECTID);
137 btrfs_commit_transaction(trans, root);
138 ret = close_ctree(root);
143 static int recow_roots(struct btrfs_trans_handle *trans,
144 struct btrfs_root *root)
147 struct extent_buffer *tmp;
148 struct btrfs_fs_info *info = root->fs_info;
150 ret = __btrfs_cow_block(trans, info->fs_root, info->fs_root->node,
151 NULL, 0, &tmp, 0, 0);
153 free_extent_buffer(tmp);
155 ret = __btrfs_cow_block(trans, info->tree_root, info->tree_root->node,
156 NULL, 0, &tmp, 0, 0);
158 free_extent_buffer(tmp);
160 ret = __btrfs_cow_block(trans, info->extent_root,
161 info->extent_root->node, NULL, 0, &tmp, 0, 0);
163 free_extent_buffer(tmp);
165 ret = __btrfs_cow_block(trans, info->chunk_root, info->chunk_root->node,
166 NULL, 0, &tmp, 0, 0);
168 free_extent_buffer(tmp);
171 ret = __btrfs_cow_block(trans, info->dev_root, info->dev_root->node,
172 NULL, 0, &tmp, 0, 0);
174 free_extent_buffer(tmp);
179 static int create_one_raid_group(struct btrfs_trans_handle *trans,
180 struct btrfs_root *root, u64 type)
186 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
187 &chunk_start, &chunk_size, type);
189 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
190 type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
191 chunk_start, chunk_size);
196 static int create_raid_groups(struct btrfs_trans_handle *trans,
197 struct btrfs_root *root, u64 data_profile,
198 u64 metadata_profile)
200 u64 num_devices = btrfs_super_num_devices(&root->fs_info->super_copy);
204 if (num_devices == 1)
205 allowed = BTRFS_BLOCK_GROUP_DUP;
206 else if (num_devices >= 4) {
207 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
208 BTRFS_BLOCK_GROUP_RAID10;
210 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1;
212 if (allowed & metadata_profile) {
213 ret = create_one_raid_group(trans, root,
214 BTRFS_BLOCK_GROUP_SYSTEM |
215 (allowed & metadata_profile));
218 ret = create_one_raid_group(trans, root,
219 BTRFS_BLOCK_GROUP_METADATA |
220 (allowed & metadata_profile));
223 ret = recow_roots(trans, root);
226 if (num_devices > 1 && (allowed & data_profile)) {
227 ret = create_one_raid_group(trans, root,
228 BTRFS_BLOCK_GROUP_DATA |
229 (allowed & data_profile));
235 static void print_usage(void)
237 fprintf(stderr, "usage: mkfs.btrfs [options] dev [ dev ... ]\n");
238 fprintf(stderr, "options:\n");
239 fprintf(stderr, "\t -b --byte-count total number of bytes in the FS\n");
240 fprintf(stderr, "\t -l --leafsize size of btree leaves\n");
241 fprintf(stderr, "\t -n --nodesize size of btree leaves\n");
242 fprintf(stderr, "\t -s --sectorsize min block allocation\n");
246 static u64 parse_profile(char *s)
248 if (strcmp(s, "raid0") == 0) {
249 return BTRFS_BLOCK_GROUP_RAID0;
250 } else if (strcmp(s, "raid1") == 0) {
251 return BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_DUP;
252 } else if (strcmp(s, "raid10") == 0) {
253 return BTRFS_BLOCK_GROUP_RAID10 | BTRFS_BLOCK_GROUP_DUP;
254 } else if (strcmp(s, "single") == 0) {
257 fprintf(stderr, "Unknown option %s\n", s);
263 static char *parse_label(char *input)
266 int len = strlen(input);
268 if (len > BTRFS_LABEL_SIZE) {
269 fprintf(stderr, "Label %s is too long (max %d)\n", input,
273 for (i = 0; i < len; i++) {
274 if (input[i] == '/' || input[i] == '\\') {
275 fprintf(stderr, "invalid label %s\n", input);
279 return strdup(input);
282 static struct option long_options[] = {
283 { "alloc-start", 1, NULL, 'A'},
284 { "byte-count", 1, NULL, 'b' },
285 { "leafsize", 1, NULL, 'l' },
286 { "label", 1, NULL, 'L'},
287 { "metadata", 1, NULL, 'm' },
288 { "nodesize", 1, NULL, 'n' },
289 { "sectorsize", 1, NULL, 's' },
290 { "data", 1, NULL, 'd' },
294 int main(int ac, char **av)
297 struct btrfs_root *root;
298 struct btrfs_trans_handle *trans;
302 u64 dev_block_count = 0;
305 u64 metadata_profile = BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_DUP;
306 u64 data_profile = BTRFS_BLOCK_GROUP_RAID0;
307 u32 leafsize = getpagesize();
308 u32 sectorsize = 4096;
309 u32 nodesize = leafsize;
310 u32 stripesize = 4096;
312 int option_index = 0;
320 c = getopt_long(ac, av, "A:b:l:n:s:m:d:L:", long_options,
326 alloc_start = parse_size(optarg);
329 data_profile = parse_profile(optarg);
332 leafsize = parse_size(optarg);
335 label = parse_label(optarg);
338 metadata_profile = parse_profile(optarg);
341 nodesize = parse_size(optarg);
344 sectorsize = parse_size(optarg);
347 block_count = parse_size(optarg);
354 sectorsize = max(sectorsize, (u32)getpagesize());
355 if (leafsize < sectorsize || (leafsize & (sectorsize - 1))) {
356 fprintf(stderr, "Illegal leafsize %u\n", leafsize);
359 if (nodesize < sectorsize || (nodesize & (sectorsize - 1))) {
360 fprintf(stderr, "Illegal nodesize %u\n", nodesize);
368 ret = check_mounted(file);
370 fprintf(stderr, "error checking %s mount status\n", file);
374 fprintf(stderr, "%s is mounted\n", file);
378 fd = open(file, O_RDWR);
380 fprintf(stderr, "unable to open %s\n", file);
385 ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count);
386 if (block_count == 0)
387 block_count = dev_block_count;
389 for (i = 0; i < 6; i++)
390 blocks[i] = BTRFS_SUPER_INFO_OFFSET + leafsize * i;
392 ret = make_btrfs(fd, file, label, blocks, block_count,
394 sectorsize, stripesize);
396 fprintf(stderr, "error during mkfs %d\n", ret);
399 ret = make_root_dir(fd, file);
401 fprintf(stderr, "failed to setup the root directory\n");
404 root = open_ctree(file, 0);
405 root->fs_info->alloc_start = alloc_start;
406 trans = btrfs_start_transaction(root, 1);
411 btrfs_register_one_device(file);
413 fprintf(stderr, "ctree init failed\n");
420 ret = check_mounted(file);
422 fprintf(stderr, "error checking %s mount status\n",
427 fprintf(stderr, "%s is mounted\n", file);
430 fd = open(file, O_RDWR);
432 fprintf(stderr, "unable to open %s\n", file);
435 ret = btrfs_device_already_in_root(root, fd,
436 BTRFS_SUPER_INFO_OFFSET);
438 fprintf(stderr, "skipping duplicate device %s in FS\n",
443 ret = btrfs_prepare_device(fd, file, zero_end,
448 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
449 sectorsize, sectorsize, sectorsize);
451 btrfs_register_one_device(file);
455 ret = create_raid_groups(trans, root, data_profile,
458 printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
459 "sectorsize %u size %s\n",
460 label, first_file, nodesize, leafsize, sectorsize,
461 pretty_sizes(btrfs_super_total_bytes(&root->fs_info->super_copy)));
463 btrfs_commit_transaction(trans, root);
464 ret = close_ctree(root);