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btrfs-progs: readme: fix link to issue tracker on github.
[btrfs-progs-unstable/devel.git] / mkfs / main.c
blob61f746b30e7c454f31d390028feaf865bc93d634
1 /*
2 * Copyright (C) 2007 Oracle. All rights reserved.
3 *
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.
7 *
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.
12 *
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.
17 */
18
19 #include "kerncompat.h"
20 #include "androidcompat.h"
21
22 #include <sys/ioctl.h>
23 #include <sys/mount.h>
24 #include "ioctl.h"
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <sys/types.h>
28 #include <sys/stat.h>
29 /* #include <sys/dir.h> included via androidcompat.h */
30 #include <fcntl.h>
31 #include <unistd.h>
32 #include <getopt.h>
33 #include <uuid/uuid.h>
34 #include <ctype.h>
35 #include <sys/xattr.h>
36 #include <limits.h>
37 #include <linux/limits.h>
38 #include <blkid/blkid.h>
39 #include <ftw.h>
40 #include "ctree.h"
41 #include "disk-io.h"
42 #include "volumes.h"
43 #include "transaction.h"
44 #include "utils.h"
45 #include "list_sort.h"
46 #include "help.h"
47 #include "mkfs/common.h"
48 #include "fsfeatures.h"
49
50 static u64 index_cnt = 2;
51 static int verbose = 1;
52
53 struct directory_name_entry {
54 const char *dir_name;
55 const char *path;
56 ino_t inum;
57 struct list_head list;
58 };
59
60 struct mkfs_allocation {
61 u64 data;
62 u64 metadata;
63 u64 mixed;
64 u64 system;
65 };
66
67 static int create_metadata_block_groups(struct btrfs_root *root, int mixed,
68 struct mkfs_allocation *allocation)
69 {
70 struct btrfs_trans_handle *trans;
71 u64 bytes_used;
72 u64 chunk_start = 0;
73 u64 chunk_size = 0;
74 int ret;
75
76 trans = btrfs_start_transaction(root, 1);
77 bytes_used = btrfs_super_bytes_used(root->fs_info->super_copy);
78
79 root->fs_info->system_allocs = 1;
80 ret = btrfs_make_block_group(trans, root, bytes_used,
81 BTRFS_BLOCK_GROUP_SYSTEM,
82 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
83 0, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
84 allocation->system += BTRFS_MKFS_SYSTEM_GROUP_SIZE;
85 if (ret)
86 return ret;
87
88 if (mixed) {
89 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
90 &chunk_start, &chunk_size,
91 BTRFS_BLOCK_GROUP_METADATA |
92 BTRFS_BLOCK_GROUP_DATA);
93 if (ret == -ENOSPC) {
94 error("no space to allocate data/metadata chunk");
95 goto err;
96 }
97 if (ret)
98 return ret;
99 ret = btrfs_make_block_group(trans, root, 0,
100 BTRFS_BLOCK_GROUP_METADATA |
101 BTRFS_BLOCK_GROUP_DATA,
102 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
103 chunk_start, chunk_size);
104 if (ret)
105 return ret;
106 allocation->mixed += chunk_size;
107 } else {
108 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
109 &chunk_start, &chunk_size,
110 BTRFS_BLOCK_GROUP_METADATA);
111 if (ret == -ENOSPC) {
112 error("no space to allocate metadata chunk");
113 goto err;
114 }
115 if (ret)
116 return ret;
117 ret = btrfs_make_block_group(trans, root, 0,
118 BTRFS_BLOCK_GROUP_METADATA,
119 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
120 chunk_start, chunk_size);
121 allocation->metadata += chunk_size;
122 if (ret)
123 return ret;
124 }
125
126 root->fs_info->system_allocs = 0;
127 ret = btrfs_commit_transaction(trans, root);
128
129 err:
130 return ret;
131 }
132
133 static int create_data_block_groups(struct btrfs_trans_handle *trans,
134 struct btrfs_root *root, int mixed,
135 struct mkfs_allocation *allocation)
136 {
137 u64 chunk_start = 0;
138 u64 chunk_size = 0;
139 int ret = 0;
140
141 if (!mixed) {
142 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
143 &chunk_start, &chunk_size,
144 BTRFS_BLOCK_GROUP_DATA);
145 if (ret == -ENOSPC) {
146 error("no space to allocate data chunk");
147 goto err;
148 }
149 if (ret)
150 return ret;
151 ret = btrfs_make_block_group(trans, root, 0,
152 BTRFS_BLOCK_GROUP_DATA,
153 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
154 chunk_start, chunk_size);
155 allocation->data += chunk_size;
156 if (ret)
157 return ret;
158 }
159
160 err:
161 return ret;
162 }
163
164 static int make_root_dir(struct btrfs_trans_handle *trans,
165 struct btrfs_root *root)
166 {
167 struct btrfs_key location;
168 int ret;
169
170 ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
171 BTRFS_ROOT_TREE_DIR_OBJECTID);
172 if (ret)
173 goto err;
174 ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
175 if (ret)
176 goto err;
177 memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
178 location.offset = (u64)-1;
179 ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
180 "default", 7,
181 btrfs_super_root_dir(root->fs_info->super_copy),
182 &location, BTRFS_FT_DIR, 0);
183 if (ret)
184 goto err;
185
186 ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
187 "default", 7, location.objectid,
188 BTRFS_ROOT_TREE_DIR_OBJECTID, 0);
189 if (ret)
190 goto err;
191
192 err:
193 return ret;
194 }
195
196 static int __recow_root(struct btrfs_trans_handle *trans,
197 struct btrfs_root *root)
198 {
199 struct extent_buffer *tmp;
200 int ret;
201
202 if (trans->transid != btrfs_root_generation(&root->root_item)) {
203 extent_buffer_get(root->node);
204 ret = __btrfs_cow_block(trans, root, root->node,
205 NULL, 0, &tmp, 0, 0);
206 if (ret)
207 return ret;
208 free_extent_buffer(tmp);
209 }
210
211 return 0;
212 }
213
214 static int recow_roots(struct btrfs_trans_handle *trans,
215 struct btrfs_root *root)
216 {
217 struct btrfs_fs_info *info = root->fs_info;
218 int ret;
219
220 ret = __recow_root(trans, info->fs_root);
221 if (ret)
222 return ret;
223 ret = __recow_root(trans, info->tree_root);
224 if (ret)
225 return ret;
226 ret = __recow_root(trans, info->extent_root);
227 if (ret)
228 return ret;
229 ret = __recow_root(trans, info->chunk_root);
230 if (ret)
231 return ret;
232 ret = __recow_root(trans, info->dev_root);
233 if (ret)
234 return ret;
235 ret = __recow_root(trans, info->csum_root);
236 if (ret)
237 return ret;
238
239 return 0;
240 }
241
242 static int create_one_raid_group(struct btrfs_trans_handle *trans,
243 struct btrfs_root *root, u64 type,
244 struct mkfs_allocation *allocation)
245
246 {
247 u64 chunk_start;
248 u64 chunk_size;
249 int ret;
250
251 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
252 &chunk_start, &chunk_size, type);
253 if (ret == -ENOSPC) {
254 error("not enough free space to allocate chunk");
255 exit(1);
256 }
257 if (ret)
258 return ret;
259
260 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
261 type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
262 chunk_start, chunk_size);
263
264 type &= BTRFS_BLOCK_GROUP_TYPE_MASK;
265 if (type == BTRFS_BLOCK_GROUP_DATA) {
266 allocation->data += chunk_size;
267 } else if (type == BTRFS_BLOCK_GROUP_METADATA) {
268 allocation->metadata += chunk_size;
269 } else if (type == BTRFS_BLOCK_GROUP_SYSTEM) {
270 allocation->system += chunk_size;
271 } else if (type ==
272 (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA)) {
273 allocation->mixed += chunk_size;
274 } else {
275 error("unrecognized profile type: 0x%llx",
276 (unsigned long long)type);
277 ret = -EINVAL;
278 }
279
280 return ret;
281 }
282
283 static int create_raid_groups(struct btrfs_trans_handle *trans,
284 struct btrfs_root *root, u64 data_profile,
285 u64 metadata_profile, int mixed,
286 struct mkfs_allocation *allocation)
287 {
288 int ret;
289
290 if (metadata_profile) {
291 u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA;
292
293 ret = create_one_raid_group(trans, root,
294 BTRFS_BLOCK_GROUP_SYSTEM |
295 metadata_profile, allocation);
296 if (ret)
297 return ret;
298
299 if (mixed)
300 meta_flags |= BTRFS_BLOCK_GROUP_DATA;
301
302 ret = create_one_raid_group(trans, root, meta_flags |
303 metadata_profile, allocation);
304 if (ret)
305 return ret;
306
307 }
308 if (!mixed && data_profile) {
309 ret = create_one_raid_group(trans, root,
310 BTRFS_BLOCK_GROUP_DATA |
311 data_profile, allocation);
312 if (ret)
313 return ret;
314 }
315 ret = recow_roots(trans, root);
316
317 return ret;
318 }
319
320 static int create_data_reloc_tree(struct btrfs_trans_handle *trans,
321 struct btrfs_root *root)
322 {
323 struct btrfs_key location;
324 struct btrfs_root_item root_item;
325 struct extent_buffer *tmp;
326 u64 objectid = BTRFS_DATA_RELOC_TREE_OBJECTID;
327 int ret;
328
329 ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
330 if (ret)
331 return ret;
332
333 memcpy(&root_item, &root->root_item, sizeof(root_item));
334 btrfs_set_root_bytenr(&root_item, tmp->start);
335 btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
336 btrfs_set_root_generation(&root_item, trans->transid);
337 free_extent_buffer(tmp);
338
339 location.objectid = objectid;
340 location.type = BTRFS_ROOT_ITEM_KEY;
341 location.offset = 0;
342 ret = btrfs_insert_root(trans, root->fs_info->tree_root,
343 &location, &root_item);
344
345 return ret;
346 }
347
348 static void print_usage(int ret)
349 {
350 printf("Usage: mkfs.btrfs [options] dev [ dev ... ]\n");
351 printf("Options:\n");
352 printf(" allocation profiles:\n");
353 printf("\t-d|--data PROFILE data profile, raid0, raid1, raid5, raid6, raid10, dup or single\n");
354 printf("\t-m|--metadata PROFILE metadata profile, values like for data profile\n");
355 printf("\t-M|--mixed mix metadata and data together\n");
356 printf(" features:\n");
357 printf("\t-n|--nodesize SIZE size of btree nodes\n");
358 printf("\t-s|--sectorsize SIZE data block size (may not be mountable by current kernel)\n");
359 printf("\t-O|--features LIST comma separated list of filesystem features (use '-O list-all' to list features)\n");
360 printf("\t-L|--label LABEL set the filesystem label\n");
361 printf("\t-U|--uuid UUID specify the filesystem UUID (must be unique)\n");
362 printf(" creation:\n");
363 printf("\t-b|--byte-count SIZE set filesystem size to SIZE (on the first device)\n");
364 printf("\t-r|--rootdir DIR copy files from DIR to the image root directory\n");
365 printf("\t-K|--nodiscard do not perform whole device TRIM\n");
366 printf("\t-f|--force force overwrite of existing filesystem\n");
367 printf(" general:\n");
368 printf("\t-q|--quiet no messages except errors\n");
369 printf("\t-V|--version print the mkfs.btrfs version and exit\n");
370 printf("\t--help print this help and exit\n");
371 printf(" deprecated:\n");
372 printf("\t-A|--alloc-start START the offset to start the filesystem\n");
373 printf("\t-l|--leafsize SIZE deprecated, alias for nodesize\n");
374 exit(ret);
375 }
376
377 static u64 parse_profile(const char *s)
378 {
379 if (strcasecmp(s, "raid0") == 0) {
380 return BTRFS_BLOCK_GROUP_RAID0;
381 } else if (strcasecmp(s, "raid1") == 0) {
382 return BTRFS_BLOCK_GROUP_RAID1;
383 } else if (strcasecmp(s, "raid5") == 0) {
384 return BTRFS_BLOCK_GROUP_RAID5;
385 } else if (strcasecmp(s, "raid6") == 0) {
386 return BTRFS_BLOCK_GROUP_RAID6;
387 } else if (strcasecmp(s, "raid10") == 0) {
388 return BTRFS_BLOCK_GROUP_RAID10;
389 } else if (strcasecmp(s, "dup") == 0) {
390 return BTRFS_BLOCK_GROUP_DUP;
391 } else if (strcasecmp(s, "single") == 0) {
392 return 0;
393 } else {
394 error("unknown profile %s", s);
395 exit(1);
396 }
397 /* not reached */
398 return 0;
399 }
400
401 static char *parse_label(const char *input)
402 {
403 int len = strlen(input);
404
405 if (len >= BTRFS_LABEL_SIZE) {
406 error("label %s is too long (max %d)", input,
407 BTRFS_LABEL_SIZE - 1);
408 exit(1);
409 }
410 return strdup(input);
411 }
412
413 static int add_directory_items(struct btrfs_trans_handle *trans,
414 struct btrfs_root *root, u64 objectid,
415 ino_t parent_inum, const char *name,
416 struct stat *st, int *dir_index_cnt)
417 {
418 int ret;
419 int name_len;
420 struct btrfs_key location;
421 u8 filetype = 0;
422
423 name_len = strlen(name);
424
425 location.objectid = objectid;
426 location.offset = 0;
427 location.type = BTRFS_INODE_ITEM_KEY;
428
429 if (S_ISDIR(st->st_mode))
430 filetype = BTRFS_FT_DIR;
431 if (S_ISREG(st->st_mode))
432 filetype = BTRFS_FT_REG_FILE;
433 if (S_ISLNK(st->st_mode))
434 filetype = BTRFS_FT_SYMLINK;
435
436 ret = btrfs_insert_dir_item(trans, root, name, name_len,
437 parent_inum, &location,
438 filetype, index_cnt);
439 if (ret)
440 return ret;
441 ret = btrfs_insert_inode_ref(trans, root, name, name_len,
442 objectid, parent_inum, index_cnt);
443 *dir_index_cnt = index_cnt;
444 index_cnt++;
445
446 return ret;
447 }
448
449 static int fill_inode_item(struct btrfs_trans_handle *trans,
450 struct btrfs_root *root,
451 struct btrfs_inode_item *dst, struct stat *src)
452 {
453 u64 blocks = 0;
454 u64 sectorsize = root->sectorsize;
455
456 /*
457 * btrfs_inode_item has some reserved fields
458 * and represents on-disk inode entry, so
459 * zero everything to prevent information leak
460 */
461 memset(dst, 0, sizeof (*dst));
462
463 btrfs_set_stack_inode_generation(dst, trans->transid);
464 btrfs_set_stack_inode_size(dst, src->st_size);
465 btrfs_set_stack_inode_nbytes(dst, 0);
466 btrfs_set_stack_inode_block_group(dst, 0);
467 btrfs_set_stack_inode_nlink(dst, src->st_nlink);
468 btrfs_set_stack_inode_uid(dst, src->st_uid);
469 btrfs_set_stack_inode_gid(dst, src->st_gid);
470 btrfs_set_stack_inode_mode(dst, src->st_mode);
471 btrfs_set_stack_inode_rdev(dst, 0);
472 btrfs_set_stack_inode_flags(dst, 0);
473 btrfs_set_stack_timespec_sec(&dst->atime, src->st_atime);
474 btrfs_set_stack_timespec_nsec(&dst->atime, 0);
475 btrfs_set_stack_timespec_sec(&dst->ctime, src->st_ctime);
476 btrfs_set_stack_timespec_nsec(&dst->ctime, 0);
477 btrfs_set_stack_timespec_sec(&dst->mtime, src->st_mtime);
478 btrfs_set_stack_timespec_nsec(&dst->mtime, 0);
479 btrfs_set_stack_timespec_sec(&dst->otime, 0);
480 btrfs_set_stack_timespec_nsec(&dst->otime, 0);
481
482 if (S_ISDIR(src->st_mode)) {
483 btrfs_set_stack_inode_size(dst, 0);
484 btrfs_set_stack_inode_nlink(dst, 1);
485 }
486 if (S_ISREG(src->st_mode)) {
487 btrfs_set_stack_inode_size(dst, (u64)src->st_size);
488 if (src->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root))
489 btrfs_set_stack_inode_nbytes(dst, src->st_size);
490 else {
491 blocks = src->st_size / sectorsize;
492 if (src->st_size % sectorsize)
493 blocks += 1;
494 blocks *= sectorsize;
495 btrfs_set_stack_inode_nbytes(dst, blocks);
496 }
497 }
498 if (S_ISLNK(src->st_mode))
499 btrfs_set_stack_inode_nbytes(dst, src->st_size + 1);
500
501 return 0;
502 }
503
504 static int directory_select(const struct direct *entry)
505 {
506 if (entry->d_name[0] == '.' &&
507 (entry->d_name[1] == 0 ||
508 (entry->d_name[1] == '.' && entry->d_name[2] == 0)))
509 return 0;
510 return 1;
511 }
512
513 static void free_namelist(struct direct **files, int count)
514 {
515 int i;
516
517 if (count < 0)
518 return;
519
520 for (i = 0; i < count; ++i)
521 free(files[i]);
522 free(files);
523 }
524
525 static u64 calculate_dir_inode_size(const char *dirname)
526 {
527 int count, i;
528 struct direct **files, *cur_file;
529 u64 dir_inode_size = 0;
530
531 count = scandir(dirname, &files, directory_select, NULL);
532
533 for (i = 0; i < count; i++) {
534 cur_file = files[i];
535 dir_inode_size += strlen(cur_file->d_name);
536 }
537
538 free_namelist(files, count);
539
540 dir_inode_size *= 2;
541 return dir_inode_size;
542 }
543
544 static int add_inode_items(struct btrfs_trans_handle *trans,
545 struct btrfs_root *root,
546 struct stat *st, const char *name,
547 u64 self_objectid,
548 struct btrfs_inode_item *inode_ret)
549 {
550 int ret;
551 struct btrfs_inode_item btrfs_inode;
552 u64 objectid;
553 u64 inode_size = 0;
554
555 fill_inode_item(trans, root, &btrfs_inode, st);
556 objectid = self_objectid;
557
558 if (S_ISDIR(st->st_mode)) {
559 inode_size = calculate_dir_inode_size(name);
560 btrfs_set_stack_inode_size(&btrfs_inode, inode_size);
561 }
562
563 ret = btrfs_insert_inode(trans, root, objectid, &btrfs_inode);
564
565 *inode_ret = btrfs_inode;
566 return ret;
567 }
568
569 static int add_xattr_item(struct btrfs_trans_handle *trans,
570 struct btrfs_root *root, u64 objectid,
571 const char *file_name)
572 {
573 int ret;
574 int cur_name_len;
575 char xattr_list[XATTR_LIST_MAX];
576 char *cur_name;
577 char cur_value[XATTR_SIZE_MAX];
578 char delimiter = '\0';
579 char *next_location = xattr_list;
580
581 ret = llistxattr(file_name, xattr_list, XATTR_LIST_MAX);
582 if (ret < 0) {
583 if(errno == ENOTSUP)
584 return 0;
585 error("getting a list of xattr failed for %s: %s", file_name,
586 strerror(errno));
587 return ret;
588 }
589 if (ret == 0)
590 return ret;
591
592 cur_name = strtok(xattr_list, &delimiter);
593 while (cur_name != NULL) {
594 cur_name_len = strlen(cur_name);
595 next_location += cur_name_len + 1;
596
597 ret = getxattr(file_name, cur_name, cur_value, XATTR_SIZE_MAX);
598 if (ret < 0) {
599 if(errno == ENOTSUP)
600 return 0;
601 error("gettig a xattr value failed for %s attr %s: %s",
602 file_name, cur_name, strerror(errno));
603 return ret;
604 }
605
606 ret = btrfs_insert_xattr_item(trans, root, cur_name,
607 cur_name_len, cur_value,
608 ret, objectid);
609 if (ret) {
610 error("inserting a xattr item failed for %s: %s",
611 file_name, strerror(-ret));
612 }
613
614 cur_name = strtok(next_location, &delimiter);
615 }
616
617 return ret;
618 }
619
620 static int add_symbolic_link(struct btrfs_trans_handle *trans,
621 struct btrfs_root *root,
622 u64 objectid, const char *path_name)
623 {
624 int ret;
625 char buf[PATH_MAX];
626
627 ret = readlink(path_name, buf, sizeof(buf));
628 if (ret <= 0) {
629 error("readlink failed for %s: %s", path_name, strerror(errno));
630 goto fail;
631 }
632 if (ret >= sizeof(buf)) {
633 error("symlink too long for %s", path_name);
634 ret = -1;
635 goto fail;
636 }
637
638 buf[ret] = '\0'; /* readlink does not do it for us */
639 ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
640 buf, ret + 1);
641 fail:
642 return ret;
643 }
644
645 static int add_file_items(struct btrfs_trans_handle *trans,
646 struct btrfs_root *root,
647 struct btrfs_inode_item *btrfs_inode, u64 objectid,
648 struct stat *st, const char *path_name)
649 {
650 int ret = -1;
651 ssize_t ret_read;
652 u64 bytes_read = 0;
653 struct btrfs_key key;
654 int blocks;
655 u32 sectorsize = root->sectorsize;
656 u64 first_block = 0;
657 u64 file_pos = 0;
658 u64 cur_bytes;
659 u64 total_bytes;
660 struct extent_buffer *eb = NULL;
661 int fd;
662
663 if (st->st_size == 0)
664 return 0;
665
666 fd = open(path_name, O_RDONLY);
667 if (fd == -1) {
668 error("cannot open %s: %s", path_name, strerror(errno));
669 return ret;
670 }
671
672 blocks = st->st_size / sectorsize;
673 if (st->st_size % sectorsize)
674 blocks += 1;
675
676 if (st->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root)) {
677 char *buffer = malloc(st->st_size);
678
679 if (!buffer) {
680 ret = -ENOMEM;
681 goto end;
682 }
683
684 ret_read = pread64(fd, buffer, st->st_size, bytes_read);
685 if (ret_read == -1) {
686 error("cannot read %s at offset %llu length %llu: %s",
687 path_name, (unsigned long long)bytes_read,
688 (unsigned long long)st->st_size,
689 strerror(errno));
690 free(buffer);
691 goto end;
692 }
693
694 ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
695 buffer, st->st_size);
696 free(buffer);
697 goto end;
698 }
699
700 /* round up our st_size to the FS blocksize */
701 total_bytes = (u64)blocks * sectorsize;
702
703 /*
704 * do our IO in extent buffers so it can work
705 * against any raid type
706 */
707 eb = calloc(1, sizeof(*eb) + sectorsize);
708 if (!eb) {
709 ret = -ENOMEM;
710 goto end;
711 }
712
713 again:
714
715 /*
716 * keep our extent size at 1MB max, this makes it easier to work inside
717 * the tiny block groups created during mkfs
718 */
719 cur_bytes = min(total_bytes, 1024ULL * 1024);
720 ret = btrfs_reserve_extent(trans, root, cur_bytes, 0, 0, (u64)-1,
721 &key, 1);
722 if (ret)
723 goto end;
724
725 first_block = key.objectid;
726 bytes_read = 0;
727
728 while (bytes_read < cur_bytes) {
729
730 memset(eb->data, 0, sectorsize);
731
732 ret_read = pread64(fd, eb->data, sectorsize, file_pos + bytes_read);
733 if (ret_read == -1) {
734 error("cannot read %s at offset %llu length %llu: %s",
735 path_name,
736 (unsigned long long)file_pos + bytes_read,
737 (unsigned long long)sectorsize,
738 strerror(errno));
739 goto end;
740 }
741
742 eb->start = first_block + bytes_read;
743 eb->len = sectorsize;
744
745 /*
746 * we're doing the csum before we record the extent, but
747 * that's ok
748 */
749 ret = btrfs_csum_file_block(trans, root->fs_info->csum_root,
750 first_block + bytes_read + sectorsize,
751 first_block + bytes_read,
752 eb->data, sectorsize);
753 if (ret)
754 goto end;
755
756 ret = write_and_map_eb(root, eb);
757 if (ret) {
758 error("failed to write %s", path_name);
759 goto end;
760 }
761
762 bytes_read += sectorsize;
763 }
764
765 if (bytes_read) {
766 ret = btrfs_record_file_extent(trans, root, objectid, btrfs_inode,
767 file_pos, first_block, cur_bytes);
768 if (ret)
769 goto end;
770
771 }
772
773 file_pos += cur_bytes;
774 total_bytes -= cur_bytes;
775
776 if (total_bytes)
777 goto again;
778
779 end:
780 free(eb);
781 close(fd);
782 return ret;
783 }
784
785 static char *make_path(const char *dir, const char *name)
786 {
787 char *path;
788
789 path = malloc(strlen(dir) + strlen(name) + 2);
790 if (!path)
791 return NULL;
792 strcpy(path, dir);
793 if (dir[strlen(dir) - 1] != '/')
794 strcat(path, "/");
795 strcat(path, name);
796 return path;
797 }
798
799 static int traverse_directory(struct btrfs_trans_handle *trans,
800 struct btrfs_root *root, const char *dir_name,
801 struct directory_name_entry *dir_head, int out_fd)
802 {
803 int ret = 0;
804
805 struct btrfs_inode_item cur_inode;
806 struct btrfs_inode_item *inode_item;
807 int count, i, dir_index_cnt;
808 struct direct **files;
809 struct stat st;
810 struct directory_name_entry *dir_entry, *parent_dir_entry;
811 struct direct *cur_file;
812 ino_t parent_inum, cur_inum;
813 ino_t highest_inum = 0;
814 const char *parent_dir_name;
815 char real_path[PATH_MAX];
816 struct btrfs_path path;
817 struct extent_buffer *leaf;
818 struct btrfs_key root_dir_key;
819 u64 root_dir_inode_size = 0;
820
821 /* Add list for source directory */
822 dir_entry = malloc(sizeof(struct directory_name_entry));
823 if (!dir_entry)
824 return -ENOMEM;
825 dir_entry->dir_name = dir_name;
826 dir_entry->path = realpath(dir_name, real_path);
827 if (!dir_entry->path) {
828 error("realpath failed for %s: %s", dir_name, strerror(errno));
829 ret = -1;
830 goto fail_no_dir;
831 }
832
833 parent_inum = highest_inum + BTRFS_FIRST_FREE_OBJECTID;
834 dir_entry->inum = parent_inum;
835 list_add_tail(&dir_entry->list, &dir_head->list);
836
837 btrfs_init_path(&path);
838
839 root_dir_key.objectid = btrfs_root_dirid(&root->root_item);
840 root_dir_key.offset = 0;
841 root_dir_key.type = BTRFS_INODE_ITEM_KEY;
842 ret = btrfs_lookup_inode(trans, root, &path, &root_dir_key, 1);
843 if (ret) {
844 error("failed to lookup root dir: %d", ret);
845 goto fail_no_dir;
846 }
847
848 leaf = path.nodes[0];
849 inode_item = btrfs_item_ptr(leaf, path.slots[0],
850 struct btrfs_inode_item);
851
852 root_dir_inode_size = calculate_dir_inode_size(dir_name);
853 btrfs_set_inode_size(leaf, inode_item, root_dir_inode_size);
854 btrfs_mark_buffer_dirty(leaf);
855
856 btrfs_release_path(&path);
857
858 do {
859 parent_dir_entry = list_entry(dir_head->list.next,
860 struct directory_name_entry,
861 list);
862 list_del(&parent_dir_entry->list);
863
864 parent_inum = parent_dir_entry->inum;
865 parent_dir_name = parent_dir_entry->dir_name;
866 if (chdir(parent_dir_entry->path)) {
867 error("chdir failed for %s: %s",
868 parent_dir_name, strerror(errno));
869 ret = -1;
870 goto fail_no_files;
871 }
872
873 count = scandir(parent_dir_entry->path, &files,
874 directory_select, NULL);
875 if (count == -1)
876 {
877 error("scandir failed for %s: %s",
878 parent_dir_name, strerror (errno));
879 ret = -1;
880 goto fail;
881 }
882
883 for (i = 0; i < count; i++) {
884 cur_file = files[i];
885
886 if (lstat(cur_file->d_name, &st) == -1) {
887 error("lstat failed for %s: %s",
888 cur_file->d_name, strerror(errno));
889 ret = -1;
890 goto fail;
891 }
892
893 cur_inum = st.st_ino;
894 ret = add_directory_items(trans, root,
895 cur_inum, parent_inum,
896 cur_file->d_name,
897 &st, &dir_index_cnt);
898 if (ret) {
899 error("unable to add directory items for %s: %d",
900 cur_file->d_name, ret);
901 goto fail;
902 }
903
904 ret = add_inode_items(trans, root, &st,
905 cur_file->d_name, cur_inum,
906 &cur_inode);
907 if (ret == -EEXIST) {
908 if (st.st_nlink <= 1) {
909 error(
910 "item %s already exists but has wrong st_nlink %lu <= 1",
911 cur_file->d_name,
912 (unsigned long)st.st_nlink);
913 goto fail;
914 }
915 continue;
916 }
917 if (ret) {
918 error("unable to add inode items for %s: %d",
919 cur_file->d_name, ret);
920 goto fail;
921 }
922
923 ret = add_xattr_item(trans, root,
924 cur_inum, cur_file->d_name);
925 if (ret) {
926 error("unable to add xattr items for %s: %d",
927 cur_file->d_name, ret);
928 if(ret != -ENOTSUP)
929 goto fail;
930 }
931
932 if (S_ISDIR(st.st_mode)) {
933 dir_entry = malloc(sizeof(struct directory_name_entry));
934 if (!dir_entry) {
935 ret = -ENOMEM;
936 goto fail;
937 }
938 dir_entry->dir_name = cur_file->d_name;
939 dir_entry->path = make_path(parent_dir_entry->path,
940 cur_file->d_name);
941 dir_entry->inum = cur_inum;
942 list_add_tail(&dir_entry->list, &dir_head->list);
943 } else if (S_ISREG(st.st_mode)) {
944 ret = add_file_items(trans, root, &cur_inode,
945 cur_inum, &st,
946 cur_file->d_name);
947 if (ret) {
948 error("unable to add file items for %s: %d",
949 cur_file->d_name, ret);
950 goto fail;
951 }
952 } else if (S_ISLNK(st.st_mode)) {
953 ret = add_symbolic_link(trans, root,
954 cur_inum, cur_file->d_name);
955 if (ret) {
956 error("unable to add symlink for %s: %d",
957 cur_file->d_name, ret);
958 goto fail;
959 }
960 }
961 }
962
963 free_namelist(files, count);
964 free(parent_dir_entry);
965
966 index_cnt = 2;
967
968 } while (!list_empty(&dir_head->list));
969
970 out:
971 return !!ret;
972 fail:
973 free_namelist(files, count);
974 fail_no_files:
975 free(parent_dir_entry);
976 goto out;
977 fail_no_dir:
978 free(dir_entry);
979 goto out;
980 }
981
982 static int create_chunks(struct btrfs_trans_handle *trans,
983 struct btrfs_root *root, u64 num_of_meta_chunks,
984 u64 size_of_data,
985 struct mkfs_allocation *allocation)
986 {
987 u64 chunk_start;
988 u64 chunk_size;
989 u64 meta_type = BTRFS_BLOCK_GROUP_METADATA;
990 u64 data_type = BTRFS_BLOCK_GROUP_DATA;
991 u64 minimum_data_chunk_size = 8 * 1024 * 1024;
992 u64 i;
993 int ret;
994
995 for (i = 0; i < num_of_meta_chunks; i++) {
996 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
997 &chunk_start, &chunk_size, meta_type);
998 if (ret)
999 return ret;
1000 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1001 meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1002 chunk_start, chunk_size);
1003 allocation->metadata += chunk_size;
1004 if (ret)
1005 return ret;
1006 set_extent_dirty(&root->fs_info->free_space_cache,
1007 chunk_start, chunk_start + chunk_size - 1);
1008 }
1009
1010 if (size_of_data < minimum_data_chunk_size)
1011 size_of_data = minimum_data_chunk_size;
1012
1013 ret = btrfs_alloc_data_chunk(trans, root->fs_info->extent_root,
1014 &chunk_start, size_of_data, data_type, 0);
1015 if (ret)
1016 return ret;
1017 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1018 data_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1019 chunk_start, size_of_data);
1020 allocation->data += size_of_data;
1021 if (ret)
1022 return ret;
1023 set_extent_dirty(&root->fs_info->free_space_cache,
1024 chunk_start, chunk_start + size_of_data - 1);
1025 return ret;
1026 }
1027
1028 static int make_image(const char *source_dir, struct btrfs_root *root,
1029 int out_fd)
1030 {
1031 int ret;
1032 struct btrfs_trans_handle *trans;
1033 struct stat root_st;
1034 struct directory_name_entry dir_head;
1035 struct directory_name_entry *dir_entry = NULL;
1036
1037 ret = lstat(source_dir, &root_st);
1038 if (ret) {
1039 error("unable to lstat %s: %s", source_dir, strerror(errno));
1040 ret = -errno;
1041 goto out;
1042 }
1043
1044 INIT_LIST_HEAD(&dir_head.list);
1045
1046 trans = btrfs_start_transaction(root, 1);
1047 ret = traverse_directory(trans, root, source_dir, &dir_head, out_fd);
1048 if (ret) {
1049 error("unable to traverse directory %s: %d", source_dir, ret);
1050 goto fail;
1051 }
1052 ret = btrfs_commit_transaction(trans, root);
1053 if (ret) {
1054 error("transaction commit failed: %d", ret);
1055 goto out;
1056 }
1057
1058 if (verbose)
1059 printf("Making image is completed.\n");
1060 return 0;
1061 fail:
1062 while (!list_empty(&dir_head.list)) {
1063 dir_entry = list_entry(dir_head.list.next,
1064 struct directory_name_entry, list);
1065 list_del(&dir_entry->list);
1066 free(dir_entry);
1067 }
1068 out:
1069 return ret;
1070 }
1071
1072 /*
1073 * This ignores symlinks with unreadable targets and subdirs that can't
1074 * be read. It's a best-effort to give a rough estimate of the size of
1075 * a subdir. It doesn't guarantee that prepopulating btrfs from this
1076 * tree won't still run out of space.
1077 */
1078 static u64 global_total_size;
1079 static u64 fs_block_size;
1080 static int ftw_add_entry_size(const char *fpath, const struct stat *st,
1081 int type)
1082 {
1083 if (type == FTW_F || type == FTW_D)
1084 global_total_size += round_up(st->st_size, fs_block_size);
1085
1086 return 0;
1087 }
1088
1089 static u64 size_sourcedir(const char *dir_name, u64 sectorsize,
1090 u64 *num_of_meta_chunks_ret, u64 *size_of_data_ret)
1091 {
1092 u64 dir_size = 0;
1093 u64 total_size = 0;
1094 int ret;
1095 u64 default_chunk_size = 8 * 1024 * 1024; /* 8MB */
1096 u64 allocated_meta_size = 8 * 1024 * 1024; /* 8MB */
1097 u64 allocated_total_size = 20 * 1024 * 1024; /* 20MB */
1098 u64 num_of_meta_chunks = 0;
1099 u64 num_of_data_chunks = 0;
1100 u64 num_of_allocated_meta_chunks =
1101 allocated_meta_size / default_chunk_size;
1102
1103 global_total_size = 0;
1104 fs_block_size = sectorsize;
1105 ret = ftw(dir_name, ftw_add_entry_size, 10);
1106 dir_size = global_total_size;
1107 if (ret < 0) {
1108 error("ftw subdir walk of %s failed: %s", dir_name,
1109 strerror(errno));
1110 exit(1);
1111 }
1112
1113 num_of_data_chunks = (dir_size + default_chunk_size - 1) /
1114 default_chunk_size;
1115
1116 num_of_meta_chunks = (dir_size / 2) / default_chunk_size;
1117 if (((dir_size / 2) % default_chunk_size) != 0)
1118 num_of_meta_chunks++;
1119 if (num_of_meta_chunks <= num_of_allocated_meta_chunks)
1120 num_of_meta_chunks = 0;
1121 else
1122 num_of_meta_chunks -= num_of_allocated_meta_chunks;
1123
1124 total_size = allocated_total_size +
1125 (num_of_data_chunks * default_chunk_size) +
1126 (num_of_meta_chunks * default_chunk_size);
1127
1128 *num_of_meta_chunks_ret = num_of_meta_chunks;
1129 *size_of_data_ret = num_of_data_chunks * default_chunk_size;
1130 return total_size;
1131 }
1132
1133 static int zero_output_file(int out_fd, u64 size)
1134 {
1135 int loop_num;
1136 u64 location = 0;
1137 char buf[4096];
1138 int ret = 0, i;
1139 ssize_t written;
1140
1141 memset(buf, 0, 4096);
1142 loop_num = size / 4096;
1143 for (i = 0; i < loop_num; i++) {
1144 written = pwrite64(out_fd, buf, 4096, location);
1145 if (written != 4096)
1146 ret = -EIO;
1147 location += 4096;
1148 }
1149 return ret;
1150 }
1151
1152 static int is_ssd(const char *file)
1153 {
1154 blkid_probe probe;
1155 char wholedisk[PATH_MAX];
1156 char sysfs_path[PATH_MAX];
1157 dev_t devno;
1158 int fd;
1159 char rotational;
1160 int ret;
1161
1162 probe = blkid_new_probe_from_filename(file);
1163 if (!probe)
1164 return 0;
1165
1166 /* Device number of this disk (possibly a partition) */
1167 devno = blkid_probe_get_devno(probe);
1168 if (!devno) {
1169 blkid_free_probe(probe);
1170 return 0;
1171 }
1172
1173 /* Get whole disk name (not full path) for this devno */
1174 ret = blkid_devno_to_wholedisk(devno,
1175 wholedisk, sizeof(wholedisk), NULL);
1176 if (ret) {
1177 blkid_free_probe(probe);
1178 return 0;
1179 }
1180
1181 snprintf(sysfs_path, PATH_MAX, "/sys/block/%s/queue/rotational",
1182 wholedisk);
1183
1184 blkid_free_probe(probe);
1185
1186 fd = open(sysfs_path, O_RDONLY);
1187 if (fd < 0) {
1188 return 0;
1189 }
1190
1191 if (read(fd, &rotational, 1) < 1) {
1192 close(fd);
1193 return 0;
1194 }
1195 close(fd);
1196
1197 return rotational == '0';
1198 }
1199
1200 static int _cmp_device_by_id(void *priv, struct list_head *a,
1201 struct list_head *b)
1202 {
1203 return list_entry(a, struct btrfs_device, dev_list)->devid -
1204 list_entry(b, struct btrfs_device, dev_list)->devid;
1205 }
1206
1207 static void list_all_devices(struct btrfs_root *root)
1208 {
1209 struct btrfs_fs_devices *fs_devices;
1210 struct btrfs_device *device;
1211 int number_of_devices = 0;
1212 u64 total_block_count = 0;
1213
1214 fs_devices = root->fs_info->fs_devices;
1215
1216 list_for_each_entry(device, &fs_devices->devices, dev_list)
1217 number_of_devices++;
1218
1219 list_sort(NULL, &fs_devices->devices, _cmp_device_by_id);
1220
1221 printf("Number of devices: %d\n", number_of_devices);
1222 /* printf("Total devices size: %10s\n", */
1223 /* pretty_size(total_block_count)); */
1224 printf("Devices:\n");
1225 printf(" ID SIZE PATH\n");
1226 list_for_each_entry(device, &fs_devices->devices, dev_list) {
1227 printf(" %3llu %10s %s\n",
1228 device->devid,
1229 pretty_size(device->total_bytes),
1230 device->name);
1231 total_block_count += device->total_bytes;
1232 }
1233
1234 printf("\n");
1235 }
1236
1237 static int is_temp_block_group(struct extent_buffer *node,
1238 struct btrfs_block_group_item *bgi,
1239 u64 data_profile, u64 meta_profile,
1240 u64 sys_profile)
1241 {
1242 u64 flag = btrfs_disk_block_group_flags(node, bgi);
1243 u64 flag_type = flag & BTRFS_BLOCK_GROUP_TYPE_MASK;
1244 u64 flag_profile = flag & BTRFS_BLOCK_GROUP_PROFILE_MASK;
1245 u64 used = btrfs_disk_block_group_used(node, bgi);
1246
1247 /*
1248 * Chunks meets all the following conditions is a temp chunk
1249 * 1) Empty chunk
1250 * Temp chunk is always empty.
1251 *
1252 * 2) profile mismatch with mkfs profile.
1253 * Temp chunk is always in SINGLE
1254 *
1255 * 3) Size differs with mkfs_alloc
1256 * Special case for SINGLE/SINGLE btrfs.
1257 * In that case, temp data chunk and real data chunk are always empty.
1258 * So we need to use mkfs_alloc to be sure which chunk is the newly
1259 * allocated.
1260 *
1261 * Normally, new chunk size is equal to mkfs one (One chunk)
1262 * If it has multiple chunks, we just refuse to delete any one.
1263 * As they are all single, so no real problem will happen.
1264 * So only use condition 1) and 2) to judge them.
1265 */
1266 if (used != 0)
1267 return 0;
1268 switch (flag_type) {
1269 case BTRFS_BLOCK_GROUP_DATA:
1270 case BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA:
1271 data_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
1272 if (flag_profile != data_profile)
1273 return 1;
1274 break;
1275 case BTRFS_BLOCK_GROUP_METADATA:
1276 meta_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
1277 if (flag_profile != meta_profile)
1278 return 1;
1279 break;
1280 case BTRFS_BLOCK_GROUP_SYSTEM:
1281 sys_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
1282 if (flag_profile != sys_profile)
1283 return 1;
1284 break;
1285 }
1286 return 0;
1287 }
1288
1289 /* Note: if current is a block group, it will skip it anyway */
1290 static int next_block_group(struct btrfs_root *root,
1291 struct btrfs_path *path)
1292 {
1293 struct btrfs_key key;
1294 int ret = 0;
1295
1296 while (1) {
1297 ret = btrfs_next_item(root, path);
1298 if (ret)
1299 goto out;
1300
1301 btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
1302 if (key.type == BTRFS_BLOCK_GROUP_ITEM_KEY)
1303 goto out;
1304 }
1305 out:
1306 return ret;
1307 }
1308
1309 /* This function will cleanup */
1310 static int cleanup_temp_chunks(struct btrfs_fs_info *fs_info,
1311 struct mkfs_allocation *alloc,
1312 u64 data_profile, u64 meta_profile,
1313 u64 sys_profile)
1314 {
1315 struct btrfs_trans_handle *trans = NULL;
1316 struct btrfs_block_group_item *bgi;
1317 struct btrfs_root *root = fs_info->extent_root;
1318 struct btrfs_key key;
1319 struct btrfs_key found_key;
1320 struct btrfs_path path;
1321 int ret = 0;
1322
1323 btrfs_init_path(&path);
1324 trans = btrfs_start_transaction(root, 1);
1325
1326 key.objectid = 0;
1327 key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
1328 key.offset = 0;
1329
1330 while (1) {
1331 /*
1332 * as the rest of the loop may modify the tree, we need to
1333 * start a new search each time.
1334 */
1335 ret = btrfs_search_slot(trans, root, &key, &path, 0, 0);
1336 if (ret < 0)
1337 goto out;
1338
1339 btrfs_item_key_to_cpu(path.nodes[0], &found_key,
1340 path.slots[0]);
1341 if (found_key.objectid < key.objectid)
1342 goto out;
1343 if (found_key.type != BTRFS_BLOCK_GROUP_ITEM_KEY) {
1344 ret = next_block_group(root, &path);
1345 if (ret < 0)
1346 goto out;
1347 if (ret > 0) {
1348 ret = 0;
1349 goto out;
1350 }
1351 btrfs_item_key_to_cpu(path.nodes[0], &found_key,
1352 path.slots[0]);
1353 }
1354
1355 bgi = btrfs_item_ptr(path.nodes[0], path.slots[0],
1356 struct btrfs_block_group_item);
1357 if (is_temp_block_group(path.nodes[0], bgi,
1358 data_profile, meta_profile,
1359 sys_profile)) {
1360 u64 flags = btrfs_disk_block_group_flags(path.nodes[0],
1361 bgi);
1362
1363 ret = btrfs_free_block_group(trans, fs_info,
1364 found_key.objectid, found_key.offset);
1365 if (ret < 0)
1366 goto out;
1367
1368 if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
1369 BTRFS_BLOCK_GROUP_DATA)
1370 alloc->data -= found_key.offset;
1371 else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
1372 BTRFS_BLOCK_GROUP_METADATA)
1373 alloc->metadata -= found_key.offset;
1374 else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
1375 BTRFS_BLOCK_GROUP_SYSTEM)
1376 alloc->system -= found_key.offset;
1377 else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
1378 (BTRFS_BLOCK_GROUP_METADATA |
1379 BTRFS_BLOCK_GROUP_DATA))
1380 alloc->mixed -= found_key.offset;
1381 }
1382 btrfs_release_path(&path);
1383 key.objectid = found_key.objectid + found_key.offset;
1384 }
1385 out:
1386 if (trans)
1387 btrfs_commit_transaction(trans, root);
1388 btrfs_release_path(&path);
1389 return ret;
1390 }
1391
1392 int main(int argc, char **argv)
1393 {
1394 char *file;
1395 struct btrfs_root *root;
1396 struct btrfs_fs_info *fs_info;
1397 struct btrfs_trans_handle *trans;
1398 char *label = NULL;
1399 u64 block_count = 0;
1400 u64 dev_block_count = 0;
1401 u64 alloc_start = 0;
1402 u64 metadata_profile = 0;
1403 u64 data_profile = 0;
1404 u32 nodesize = max_t(u32, sysconf(_SC_PAGESIZE),
1405 BTRFS_MKFS_DEFAULT_NODE_SIZE);
1406 u32 sectorsize = 4096;
1407 u32 stripesize = 4096;
1408 int zero_end = 1;
1409 int fd;
1410 int ret;
1411 int i;
1412 int mixed = 0;
1413 int nodesize_forced = 0;
1414 int data_profile_opt = 0;
1415 int metadata_profile_opt = 0;
1416 int discard = 1;
1417 int ssd = 0;
1418 int force_overwrite = 0;
1419 char *source_dir = NULL;
1420 int source_dir_set = 0;
1421 u64 num_of_meta_chunks = 0;
1422 u64 size_of_data = 0;
1423 u64 source_dir_size = 0;
1424 int dev_cnt = 0;
1425 int saved_optind;
1426 char fs_uuid[BTRFS_UUID_UNPARSED_SIZE] = { 0 };
1427 u64 features = BTRFS_MKFS_DEFAULT_FEATURES;
1428 struct mkfs_allocation allocation = { 0 };
1429 struct btrfs_mkfs_config mkfs_cfg;
1430
1431 while(1) {
1432 int c;
1433 static const struct option long_options[] = {
1434 { "alloc-start", required_argument, NULL, 'A'},
1435 { "byte-count", required_argument, NULL, 'b' },
1436 { "force", no_argument, NULL, 'f' },
1437 { "leafsize", required_argument, NULL, 'l' },
1438 { "label", required_argument, NULL, 'L'},
1439 { "metadata", required_argument, NULL, 'm' },
1440 { "mixed", no_argument, NULL, 'M' },
1441 { "nodesize", required_argument, NULL, 'n' },
1442 { "sectorsize", required_argument, NULL, 's' },
1443 { "data", required_argument, NULL, 'd' },
1444 { "version", no_argument, NULL, 'V' },
1445 { "rootdir", required_argument, NULL, 'r' },
1446 { "nodiscard", no_argument, NULL, 'K' },
1447 { "features", required_argument, NULL, 'O' },
1448 { "uuid", required_argument, NULL, 'U' },
1449 { "quiet", 0, NULL, 'q' },
1450 { "help", no_argument, NULL, GETOPT_VAL_HELP },
1451 { NULL, 0, NULL, 0}
1452 };
1453
1454 c = getopt_long(argc, argv, "A:b:fl:n:s:m:d:L:O:r:U:VMKq",
1455 long_options, NULL);
1456 if (c < 0)
1457 break;
1458 switch(c) {
1459 case 'A':
1460 alloc_start = parse_size(optarg);
1461 break;
1462 case 'f':
1463 force_overwrite = 1;
1464 break;
1465 case 'd':
1466 data_profile = parse_profile(optarg);
1467 data_profile_opt = 1;
1468 break;
1469 case 'l':
1470 warning("--leafsize is deprecated, use --nodesize");
1471 /* fall through */
1472 case 'n':
1473 nodesize = parse_size(optarg);
1474 nodesize_forced = 1;
1475 break;
1476 case 'L':
1477 label = parse_label(optarg);
1478 break;
1479 case 'm':
1480 metadata_profile = parse_profile(optarg);
1481 metadata_profile_opt = 1;
1482 break;
1483 case 'M':
1484 mixed = 1;
1485 break;
1486 case 'O': {
1487 char *orig = strdup(optarg);
1488 char *tmp = orig;
1489
1490 tmp = btrfs_parse_fs_features(tmp, &features);
1491 if (tmp) {
1492 error("unrecognized filesystem feature '%s'",
1493 tmp);
1494 free(orig);
1495 exit(1);
1496 }
1497 free(orig);
1498 if (features & BTRFS_FEATURE_LIST_ALL) {
1499 btrfs_list_all_fs_features(0);
1500 exit(0);
1501 }
1502 break;
1503 }
1504 case 's':
1505 sectorsize = parse_size(optarg);
1506 break;
1507 case 'b':
1508 block_count = parse_size(optarg);
1509 zero_end = 0;
1510 break;
1511 case 'V':
1512 printf("mkfs.btrfs, part of %s\n",
1513 PACKAGE_STRING);
1514 exit(0);
1515 break;
1516 case 'r':
1517 source_dir = optarg;
1518 source_dir_set = 1;
1519 break;
1520 case 'U':
1521 strncpy(fs_uuid, optarg,
1522 BTRFS_UUID_UNPARSED_SIZE - 1);
1523 break;
1524 case 'K':
1525 discard = 0;
1526 break;
1527 case 'q':
1528 verbose = 0;
1529 break;
1530 case GETOPT_VAL_HELP:
1531 default:
1532 print_usage(c != GETOPT_VAL_HELP);
1533 }
1534 }
1535
1536 if (verbose) {
1537 printf("%s\n", PACKAGE_STRING);
1538 printf("See %s for more information.\n\n", PACKAGE_URL);
1539 }
1540
1541 sectorsize = max(sectorsize, (u32)sysconf(_SC_PAGESIZE));
1542 stripesize = sectorsize;
1543 saved_optind = optind;
1544 dev_cnt = argc - optind;
1545 if (dev_cnt == 0)
1546 print_usage(1);
1547
1548 if (source_dir_set && dev_cnt > 1) {
1549 error("the option -r is limited to a single device");
1550 exit(1);
1551 }
1552
1553 if (*fs_uuid) {
1554 uuid_t dummy_uuid;
1555
1556 if (uuid_parse(fs_uuid, dummy_uuid) != 0) {
1557 error("could not parse UUID: %s", fs_uuid);
1558 exit(1);
1559 }
1560 if (!test_uuid_unique(fs_uuid)) {
1561 error("non-unique UUID: %s", fs_uuid);
1562 exit(1);
1563 }
1564 }
1565
1566 while (dev_cnt-- > 0) {
1567 file = argv[optind++];
1568 if (is_block_device(file) == 1)
1569 if (test_dev_for_mkfs(file, force_overwrite))
1570 exit(1);
1571 }
1572
1573 optind = saved_optind;
1574 dev_cnt = argc - optind;
1575
1576 file = argv[optind++];
1577 ssd = is_ssd(file);
1578
1579 /*
1580 * Set default profiles according to number of added devices.
1581 * For mixed groups defaults are single/single.
1582 */
1583 if (!mixed) {
1584 if (!metadata_profile_opt) {
1585 if (dev_cnt == 1 && ssd && verbose)
1586 printf("Detected a SSD, turning off metadata "
1587 "duplication. Mkfs with -m dup if you want to "
1588 "force metadata duplication.\n");
1589
1590 metadata_profile = (dev_cnt > 1) ?
1591 BTRFS_BLOCK_GROUP_RAID1 : (ssd) ?
1592 0: BTRFS_BLOCK_GROUP_DUP;
1593 }
1594 if (!data_profile_opt) {
1595 data_profile = (dev_cnt > 1) ?
1596 BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */
1597 }
1598 } else {
1599 u32 best_nodesize = max_t(u32, sysconf(_SC_PAGESIZE), sectorsize);
1600
1601 if (metadata_profile_opt || data_profile_opt) {
1602 if (metadata_profile != data_profile) {
1603 error(
1604 "with mixed block groups data and metadata profiles must be the same");
1605 exit(1);
1606 }
1607 }
1608
1609 if (!nodesize_forced)
1610 nodesize = best_nodesize;
1611 }
1612
1613 /*
1614 * FS features that can be set by other means than -O
1615 * just set the bit here
1616 */
1617 if (mixed)
1618 features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
1619
1620 if ((data_profile | metadata_profile) &
1621 (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
1622 features |= BTRFS_FEATURE_INCOMPAT_RAID56;
1623 }
1624
1625 if (btrfs_check_nodesize(nodesize, sectorsize,
1626 features))
1627 exit(1);
1628
1629 if (sectorsize < sizeof(struct btrfs_super_block)) {
1630 error("sectorsize smaller than superblock: %u < %zu",
1631 sectorsize, sizeof(struct btrfs_super_block));
1632 exit(1);
1633 }
1634
1635 /* Check device/block_count after the nodesize is determined */
1636 if (block_count && block_count < btrfs_min_dev_size(nodesize)) {
1637 error("size %llu is too small to make a usable filesystem",
1638 block_count);
1639 error("minimum size for btrfs filesystem is %llu",
1640 btrfs_min_dev_size(nodesize));
1641 exit(1);
1642 }
1643 for (i = saved_optind; i < saved_optind + dev_cnt; i++) {
1644 char *path;
1645
1646 path = argv[i];
1647 ret = test_minimum_size(path, nodesize);
1648 if (ret < 0) {
1649 error("failed to check size for %s: %s",
1650 path, strerror(-ret));
1651 exit (1);
1652 }
1653 if (ret > 0) {
1654 error("'%s' is too small to make a usable filesystem",
1655 path);
1656 error("minimum size for each btrfs device is %llu",
1657 btrfs_min_dev_size(nodesize));
1658 exit(1);
1659 }
1660 }
1661 ret = test_num_disk_vs_raid(metadata_profile, data_profile,
1662 dev_cnt, mixed, ssd);
1663 if (ret)
1664 exit(1);
1665
1666 dev_cnt--;
1667
1668 if (!source_dir_set) {
1669 /*
1670 * open without O_EXCL so that the problem should not
1671 * occur by the following processing.
1672 * (btrfs_register_one_device() fails if O_EXCL is on)
1673 */
1674 fd = open(file, O_RDWR);
1675 if (fd < 0) {
1676 error("unable to open %s: %s", file, strerror(errno));
1677 exit(1);
1678 }
1679 ret = btrfs_prepare_device(fd, file, &dev_block_count,
1680 block_count,
1681 (zero_end ? PREP_DEVICE_ZERO_END : 0) |
1682 (discard ? PREP_DEVICE_DISCARD : 0) |
1683 (verbose ? PREP_DEVICE_VERBOSE : 0));
1684 if (ret) {
1685 close(fd);
1686 exit(1);
1687 }
1688 if (block_count && block_count > dev_block_count) {
1689 error("%s is smaller than requested size, expected %llu, found %llu",
1690 file,
1691 (unsigned long long)block_count,
1692 (unsigned long long)dev_block_count);
1693 exit(1);
1694 }
1695 } else {
1696 fd = open(file, O_CREAT | O_RDWR,
1697 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
1698 if (fd < 0) {
1699 error("unable to open %s: %s", file, strerror(errno));
1700 exit(1);
1701 }
1702
1703 source_dir_size = size_sourcedir(source_dir, sectorsize,
1704 &num_of_meta_chunks, &size_of_data);
1705 if(block_count < source_dir_size)
1706 block_count = source_dir_size;
1707 ret = zero_output_file(fd, block_count);
1708 if (ret) {
1709 error("unable to zero the output file");
1710 exit(1);
1711 }
1712 /* our "device" is the new image file */
1713 dev_block_count = block_count;
1714 }
1715
1716 /* To create the first block group and chunk 0 in make_btrfs */
1717 if (dev_block_count < BTRFS_MKFS_SYSTEM_GROUP_SIZE) {
1718 error("device is too small to make filesystem, must be at least %llu",
1719 (unsigned long long)BTRFS_MKFS_SYSTEM_GROUP_SIZE);
1720 exit(1);
1721 }
1722
1723 if (group_profile_max_safe_loss(metadata_profile) <
1724 group_profile_max_safe_loss(data_profile)){
1725 warning("metadata has lower redundancy than data!\n");
1726 }
1727
1728 mkfs_cfg.label = label;
1729 memcpy(mkfs_cfg.fs_uuid, fs_uuid, sizeof(mkfs_cfg.fs_uuid));
1730 mkfs_cfg.num_bytes = dev_block_count;
1731 mkfs_cfg.nodesize = nodesize;
1732 mkfs_cfg.sectorsize = sectorsize;
1733 mkfs_cfg.stripesize = stripesize;
1734 mkfs_cfg.features = features;
1735
1736 ret = make_btrfs(fd, &mkfs_cfg);
1737 if (ret) {
1738 error("error during mkfs: %s", strerror(-ret));
1739 exit(1);
1740 }
1741
1742 fs_info = open_ctree_fs_info(file, 0, 0, 0,
1743 OPEN_CTREE_WRITES | OPEN_CTREE_FS_PARTIAL);
1744 if (!fs_info) {
1745 error("open ctree failed");
1746 close(fd);
1747 exit(1);
1748 }
1749 root = fs_info->fs_root;
1750 fs_info->alloc_start = alloc_start;
1751
1752 ret = create_metadata_block_groups(root, mixed, &allocation);
1753 if (ret) {
1754 error("failed to create default block groups: %d", ret);
1755 exit(1);
1756 }
1757
1758 trans = btrfs_start_transaction(root, 1);
1759 if (!trans) {
1760 error("failed to start transaction");
1761 exit(1);
1762 }
1763
1764 ret = create_data_block_groups(trans, root, mixed, &allocation);
1765 if (ret) {
1766 error("failed to create default data block groups: %d", ret);
1767 exit(1);
1768 }
1769
1770 ret = make_root_dir(trans, root);
1771 if (ret) {
1772 error("failed to setup the root directory: %d", ret);
1773 exit(1);
1774 }
1775
1776 ret = btrfs_commit_transaction(trans, root);
1777 if (ret) {
1778 error("unable to commit transaction: %d", ret);
1779 goto out;
1780 }
1781
1782 trans = btrfs_start_transaction(root, 1);
1783 if (!trans) {
1784 error("failed to start transaction");
1785 exit(1);
1786 }
1787
1788 if (dev_cnt == 0)
1789 goto raid_groups;
1790
1791 while (dev_cnt-- > 0) {
1792 file = argv[optind++];
1793
1794 /*
1795 * open without O_EXCL so that the problem should not
1796 * occur by the following processing.
1797 * (btrfs_register_one_device() fails if O_EXCL is on)
1798 */
1799 fd = open(file, O_RDWR);
1800 if (fd < 0) {
1801 error("unable to open %s: %s", file, strerror(errno));
1802 exit(1);
1803 }
1804 ret = btrfs_device_already_in_root(root, fd,
1805 BTRFS_SUPER_INFO_OFFSET);
1806 if (ret) {
1807 error("skipping duplicate device %s in the filesystem",
1808 file);
1809 close(fd);
1810 continue;
1811 }
1812 ret = btrfs_prepare_device(fd, file, &dev_block_count,
1813 block_count,
1814 (verbose ? PREP_DEVICE_VERBOSE : 0) |
1815 (zero_end ? PREP_DEVICE_ZERO_END : 0) |
1816 (discard ? PREP_DEVICE_DISCARD : 0));
1817 if (ret) {
1818 close(fd);
1819 exit(1);
1820 }
1821
1822 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
1823 sectorsize, sectorsize, sectorsize);
1824 if (ret) {
1825 error("unable to add %s to filesystem: %d", file, ret);
1826 goto out;
1827 }
1828 if (verbose >= 2) {
1829 struct btrfs_device *device;
1830
1831 device = container_of(fs_info->fs_devices->devices.next,
1832 struct btrfs_device, dev_list);
1833 printf("adding device %s id %llu\n", file,
1834 (unsigned long long)device->devid);
1835 }
1836 }
1837
1838 raid_groups:
1839 if (!source_dir_set) {
1840 ret = create_raid_groups(trans, root, data_profile,
1841 metadata_profile, mixed, &allocation);
1842 if (ret) {
1843 error("unable to create raid groups: %d", ret);
1844 goto out;
1845 }
1846 }
1847
1848 ret = create_data_reloc_tree(trans, root);
1849 if (ret) {
1850 error("unable to create data reloc tree: %d", ret);
1851 goto out;
1852 }
1853
1854 ret = btrfs_commit_transaction(trans, root);
1855 if (ret) {
1856 error("unable to commit transaction: %d", ret);
1857 goto out;
1858 }
1859
1860 if (source_dir_set) {
1861 trans = btrfs_start_transaction(root, 1);
1862 ret = create_chunks(trans, root,
1863 num_of_meta_chunks, size_of_data,
1864 &allocation);
1865 if (ret) {
1866 error("unable to create chunks: %d", ret);
1867 goto out;
1868 }
1869 ret = btrfs_commit_transaction(trans, root);
1870 if (ret) {
1871 error("transaction commit failed: %d", ret);
1872 goto out;
1873 }
1874
1875 ret = make_image(source_dir, root, fd);
1876 if (ret) {
1877 error("error wihle filling filesystem: %d", ret);
1878 goto out;
1879 }
1880 }
1881 ret = cleanup_temp_chunks(fs_info, &allocation, data_profile,
1882 metadata_profile, metadata_profile);
1883 if (ret < 0) {
1884 error("failed to cleanup temporary chunks: %d", ret);
1885 goto out;
1886 }
1887
1888 if (verbose) {
1889 char features_buf[64];
1890
1891 printf("Label: %s\n", label);
1892 printf("UUID: %s\n", mkfs_cfg.fs_uuid);
1893 printf("Node size: %u\n", nodesize);
1894 printf("Sector size: %u\n", sectorsize);
1895 printf("Filesystem size: %s\n",
1896 pretty_size(btrfs_super_total_bytes(fs_info->super_copy)));
1897 printf("Block group profiles:\n");
1898 if (allocation.data)
1899 printf(" Data: %-8s %16s\n",
1900 btrfs_group_profile_str(data_profile),
1901 pretty_size(allocation.data));
1902 if (allocation.metadata)
1903 printf(" Metadata: %-8s %16s\n",
1904 btrfs_group_profile_str(metadata_profile),
1905 pretty_size(allocation.metadata));
1906 if (allocation.mixed)
1907 printf(" Data+Metadata: %-8s %16s\n",
1908 btrfs_group_profile_str(data_profile),
1909 pretty_size(allocation.mixed));
1910 printf(" System: %-8s %16s\n",
1911 btrfs_group_profile_str(metadata_profile),
1912 pretty_size(allocation.system));
1913 printf("SSD detected: %s\n", ssd ? "yes" : "no");
1914 btrfs_parse_features_to_string(features_buf, features);
1915 printf("Incompat features: %s", features_buf);
1916 printf("\n");
1917
1918 list_all_devices(root);
1919 }
1920
1921 /*
1922 * The filesystem is now fully set up, commit the remaining changes and
1923 * fix the signature as the last step before closing the devices.
1924 */
1925 fs_info->finalize_on_close = 1;
1926 out:
1927 ret = close_ctree(root);
1928
1929 if (!ret) {
1930 optind = saved_optind;
1931 dev_cnt = argc - optind;
1932 while (dev_cnt-- > 0) {
1933 file = argv[optind++];
1934 if (is_block_device(file) == 1)
1935 btrfs_register_one_device(file);
1936 }
1937 }
1938
1939 btrfs_close_all_devices();
1940 free(label);
1941
1942 return !!ret;
1943 }
(deprecated) Btrfs progs developments and patch integration