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/ioctl.h>
24 #include <sys/mount.h>
30 #include <sys/types.h>
35 #include <uuid/uuid.h>
38 #include "kerncompat.h"
42 #include "transaction.h"
46 static u64 parse_size(char *s)
52 if (!isdigit(s[len - 1])) {
53 c = tolower(s[len - 1]);
64 fprintf(stderr, "Unknown size descriptor %c\n", c);
69 return atol(s) * mult;
72 static int make_root_dir(struct btrfs_root *root)
74 struct btrfs_trans_handle *trans;
75 struct btrfs_key location;
81 trans = btrfs_start_transaction(root, 1);
82 bytes_used = btrfs_super_bytes_used(&root->fs_info->super_copy);
84 root->fs_info->system_allocs = 1;
85 ret = btrfs_make_block_group(trans, root, bytes_used,
86 BTRFS_BLOCK_GROUP_SYSTEM,
87 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
88 0, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
91 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
92 &chunk_start, &chunk_size,
93 BTRFS_BLOCK_GROUP_METADATA);
95 ret = btrfs_make_block_group(trans, root, 0,
96 BTRFS_BLOCK_GROUP_METADATA,
97 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
98 chunk_start, chunk_size);
101 root->fs_info->system_allocs = 0;
102 btrfs_commit_transaction(trans, root);
103 trans = btrfs_start_transaction(root, 1);
106 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
107 &chunk_start, &chunk_size,
108 BTRFS_BLOCK_GROUP_DATA);
110 ret = btrfs_make_block_group(trans, root, 0,
111 BTRFS_BLOCK_GROUP_DATA,
112 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
113 chunk_start, chunk_size);
116 ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
117 BTRFS_ROOT_TREE_DIR_OBJECTID);
120 ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
123 memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
124 location.offset = (u64)-1;
125 ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
127 btrfs_super_root_dir(&root->fs_info->super_copy),
128 &location, BTRFS_FT_DIR, 0);
132 ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
133 "default", 7, location.objectid,
134 BTRFS_ROOT_TREE_DIR_OBJECTID, 0);
138 btrfs_commit_transaction(trans, 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);
176 ret = __btrfs_cow_block(trans, info->csum_root, info->csum_root->node,
177 NULL, 0, &tmp, 0, 0);
179 free_extent_buffer(tmp);
184 static int create_one_raid_group(struct btrfs_trans_handle *trans,
185 struct btrfs_root *root, u64 type)
191 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
192 &chunk_start, &chunk_size, type);
194 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
195 type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
196 chunk_start, chunk_size);
201 static int create_raid_groups(struct btrfs_trans_handle *trans,
202 struct btrfs_root *root, u64 data_profile,
203 u64 metadata_profile)
205 u64 num_devices = btrfs_super_num_devices(&root->fs_info->super_copy);
209 if (num_devices == 1)
210 allowed = BTRFS_BLOCK_GROUP_DUP;
211 else if (num_devices >= 4) {
212 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
213 BTRFS_BLOCK_GROUP_RAID10;
215 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1;
217 if (allowed & metadata_profile) {
218 ret = create_one_raid_group(trans, root,
219 BTRFS_BLOCK_GROUP_SYSTEM |
220 (allowed & metadata_profile));
223 ret = create_one_raid_group(trans, root,
224 BTRFS_BLOCK_GROUP_METADATA |
225 (allowed & metadata_profile));
228 ret = recow_roots(trans, root);
231 if (num_devices > 1 && (allowed & data_profile)) {
232 ret = create_one_raid_group(trans, root,
233 BTRFS_BLOCK_GROUP_DATA |
234 (allowed & data_profile));
240 static int create_data_reloc_tree(struct btrfs_trans_handle *trans,
241 struct btrfs_root *root)
243 struct btrfs_key location;
244 struct btrfs_root_item root_item;
245 struct extent_buffer *tmp;
246 u64 objectid = BTRFS_DATA_RELOC_TREE_OBJECTID;
249 ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
252 memcpy(&root_item, &root->root_item, sizeof(root_item));
253 btrfs_set_root_bytenr(&root_item, tmp->start);
254 btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
255 btrfs_set_root_generation(&root_item, trans->transid);
256 free_extent_buffer(tmp);
258 location.objectid = objectid;
259 location.type = BTRFS_ROOT_ITEM_KEY;
261 ret = btrfs_insert_root(trans, root->fs_info->tree_root,
262 &location, &root_item);
267 static void print_usage(void)
269 fprintf(stderr, "usage: mkfs.btrfs [options] dev [ dev ... ]\n");
270 fprintf(stderr, "options:\n");
271 fprintf(stderr, "\t -A --alloc-start the offset to start the FS\n");
272 fprintf(stderr, "\t -b --byte-count total number of bytes in the FS\n");
273 fprintf(stderr, "\t -d --data data profile, raid0, raid1, raid10 or single\n");
274 fprintf(stderr, "\t -l --leafsize size of btree leaves\n");
275 fprintf(stderr, "\t -L --label set a label\n");
276 fprintf(stderr, "\t -m --metadata metadata profile, values like data profile\n");
277 fprintf(stderr, "\t -n --nodesize size of btree nodes\n");
278 fprintf(stderr, "\t -s --sectorsize min block allocation\n");
279 fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
283 static void print_version(void)
285 fprintf(stderr, "mkfs.btrfs, part of %s\n", BTRFS_BUILD_VERSION);
289 static u64 parse_profile(char *s)
291 if (strcmp(s, "raid0") == 0) {
292 return BTRFS_BLOCK_GROUP_RAID0;
293 } else if (strcmp(s, "raid1") == 0) {
294 return BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_DUP;
295 } else if (strcmp(s, "raid10") == 0) {
296 return BTRFS_BLOCK_GROUP_RAID10 | BTRFS_BLOCK_GROUP_DUP;
297 } else if (strcmp(s, "single") == 0) {
300 fprintf(stderr, "Unknown option %s\n", s);
306 static char *parse_label(char *input)
309 int len = strlen(input);
311 if (len > BTRFS_LABEL_SIZE) {
312 fprintf(stderr, "Label %s is too long (max %d)\n", input,
316 for (i = 0; i < len; i++) {
317 if (input[i] == '/' || input[i] == '\\') {
318 fprintf(stderr, "invalid label %s\n", input);
322 return strdup(input);
325 static struct option long_options[] = {
326 { "alloc-start", 1, NULL, 'A'},
327 { "byte-count", 1, NULL, 'b' },
328 { "leafsize", 1, NULL, 'l' },
329 { "label", 1, NULL, 'L'},
330 { "metadata", 1, NULL, 'm' },
331 { "nodesize", 1, NULL, 'n' },
332 { "sectorsize", 1, NULL, 's' },
333 { "data", 1, NULL, 'd' },
334 { "version", 0, NULL, 'V' },
338 int main(int ac, char **av)
341 struct btrfs_root *root;
342 struct btrfs_trans_handle *trans;
346 u64 dev_block_count = 0;
349 u64 metadata_profile = BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_DUP;
350 u64 data_profile = BTRFS_BLOCK_GROUP_RAID0;
351 u32 leafsize = getpagesize();
352 u32 sectorsize = 4096;
353 u32 nodesize = leafsize;
354 u32 stripesize = 4096;
356 int option_index = 0;
364 c = getopt_long(ac, av, "A:b:l:n:s:m:d:L:V", long_options,
370 alloc_start = parse_size(optarg);
373 data_profile = parse_profile(optarg);
376 leafsize = parse_size(optarg);
379 label = parse_label(optarg);
382 metadata_profile = parse_profile(optarg);
385 nodesize = parse_size(optarg);
388 sectorsize = parse_size(optarg);
391 block_count = parse_size(optarg);
392 if (block_count < 256*1024*1024) {
393 fprintf(stderr, "File system size "
394 "%llu bytes is too small, "
395 "256M is required at least\n",
396 (unsigned long long)block_count);
408 sectorsize = max(sectorsize, (u32)getpagesize());
409 if (leafsize < sectorsize || (leafsize & (sectorsize - 1))) {
410 fprintf(stderr, "Illegal leafsize %u\n", leafsize);
413 if (nodesize < sectorsize || (nodesize & (sectorsize - 1))) {
414 fprintf(stderr, "Illegal nodesize %u\n", nodesize);
421 printf("\nWARNING! - %s IS EXPERIMENTAL\n", BTRFS_BUILD_VERSION);
422 printf("WARNING! - see http://btrfs.wiki.kernel.org before using\n\n");
425 ret = check_mounted(file);
427 fprintf(stderr, "error checking %s mount status\n", file);
431 fprintf(stderr, "%s is mounted\n", file);
435 fd = open(file, O_RDWR);
437 fprintf(stderr, "unable to open %s\n", file);
442 ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count);
443 if (block_count == 0)
444 block_count = dev_block_count;
446 blocks[0] = BTRFS_SUPER_INFO_OFFSET;
447 for (i = 1; i < 7; i++) {
448 blocks[i] = BTRFS_SUPER_INFO_OFFSET + 1024 * 1024 +
452 ret = make_btrfs(fd, file, label, blocks, block_count,
454 sectorsize, stripesize);
456 fprintf(stderr, "error during mkfs %d\n", ret);
459 root = open_ctree(file, 0, O_RDWR);
460 root->fs_info->alloc_start = alloc_start;
462 ret = make_root_dir(root);
464 fprintf(stderr, "failed to setup the root directory\n");
468 trans = btrfs_start_transaction(root, 1);
473 btrfs_register_one_device(file);
475 fprintf(stderr, "ctree init failed\n");
482 ret = check_mounted(file);
484 fprintf(stderr, "error checking %s mount status\n",
489 fprintf(stderr, "%s is mounted\n", file);
492 fd = open(file, O_RDWR);
494 fprintf(stderr, "unable to open %s\n", file);
497 ret = btrfs_device_already_in_root(root, fd,
498 BTRFS_SUPER_INFO_OFFSET);
500 fprintf(stderr, "skipping duplicate device %s in FS\n",
505 ret = btrfs_prepare_device(fd, file, zero_end,
510 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
511 sectorsize, sectorsize, sectorsize);
513 btrfs_register_one_device(file);
517 ret = create_raid_groups(trans, root, data_profile,
521 ret = create_data_reloc_tree(trans, root);
524 printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
525 "sectorsize %u size %s\n",
526 label, first_file, nodesize, leafsize, sectorsize,
527 pretty_sizes(btrfs_super_total_bytes(&root->fs_info->super_copy)));
529 printf("%s\n", BTRFS_BUILD_VERSION);
530 btrfs_commit_transaction(trans, root);
531 ret = close_ctree(root);