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btrfs-progs: add btrfs_clear_free_space_tree() from the kernel
[btrfs-progs-unstable/devel.git] / mkfs.c
blobe501a93917f0f1f22fa7025b6f931b377d37efe9
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
47 static u64 index_cnt = 2;
48 static int verbose = 1;
49
50 struct directory_name_entry {
51 const char *dir_name;
52 const char *path;
53 ino_t inum;
54 struct list_head list;
55 };
56
57 struct mkfs_allocation {
58 u64 data;
59 u64 metadata;
60 u64 mixed;
61 u64 system;
62 };
63
64 static int create_metadata_block_groups(struct btrfs_root *root, int mixed,
65 struct mkfs_allocation *allocation)
66 {
67 struct btrfs_trans_handle *trans;
68 u64 bytes_used;
69 u64 chunk_start = 0;
70 u64 chunk_size = 0;
71 int ret;
72
73 trans = btrfs_start_transaction(root, 1);
74 bytes_used = btrfs_super_bytes_used(root->fs_info->super_copy);
75
76 root->fs_info->system_allocs = 1;
77 ret = btrfs_make_block_group(trans, root, bytes_used,
78 BTRFS_BLOCK_GROUP_SYSTEM,
79 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
80 0, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
81 allocation->system += BTRFS_MKFS_SYSTEM_GROUP_SIZE;
82 if (ret)
83 return ret;
84
85 if (mixed) {
86 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
87 &chunk_start, &chunk_size,
88 BTRFS_BLOCK_GROUP_METADATA |
89 BTRFS_BLOCK_GROUP_DATA);
90 if (ret == -ENOSPC) {
91 error("no space to allocate data/metadata chunk");
92 goto err;
93 }
94 if (ret)
95 return ret;
96 ret = btrfs_make_block_group(trans, root, 0,
97 BTRFS_BLOCK_GROUP_METADATA |
98 BTRFS_BLOCK_GROUP_DATA,
99 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
100 chunk_start, chunk_size);
101 if (ret)
102 return ret;
103 allocation->mixed += chunk_size;
104 } else {
105 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
106 &chunk_start, &chunk_size,
107 BTRFS_BLOCK_GROUP_METADATA);
108 if (ret == -ENOSPC) {
109 error("no space to allocate metadata chunk");
110 goto err;
111 }
112 if (ret)
113 return ret;
114 ret = btrfs_make_block_group(trans, root, 0,
115 BTRFS_BLOCK_GROUP_METADATA,
116 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
117 chunk_start, chunk_size);
118 allocation->metadata += chunk_size;
119 if (ret)
120 return ret;
121 }
122
123 root->fs_info->system_allocs = 0;
124 ret = btrfs_commit_transaction(trans, root);
125
126 err:
127 return ret;
128 }
129
130 static int create_data_block_groups(struct btrfs_trans_handle *trans,
131 struct btrfs_root *root, int mixed,
132 struct mkfs_allocation *allocation)
133 {
134 u64 chunk_start = 0;
135 u64 chunk_size = 0;
136 int ret = 0;
137
138 if (!mixed) {
139 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
140 &chunk_start, &chunk_size,
141 BTRFS_BLOCK_GROUP_DATA);
142 if (ret == -ENOSPC) {
143 error("no space to allocate data chunk");
144 goto err;
145 }
146 if (ret)
147 return ret;
148 ret = btrfs_make_block_group(trans, root, 0,
149 BTRFS_BLOCK_GROUP_DATA,
150 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
151 chunk_start, chunk_size);
152 allocation->data += chunk_size;
153 if (ret)
154 return ret;
155 }
156
157 err:
158 return ret;
159 }
160
161 static int make_root_dir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
162 struct mkfs_allocation *allocation)
163 {
164 struct btrfs_key location;
165 int ret;
166
167 ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
168 BTRFS_ROOT_TREE_DIR_OBJECTID);
169 if (ret)
170 goto err;
171 ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
172 if (ret)
173 goto err;
174 memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
175 location.offset = (u64)-1;
176 ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
177 "default", 7,
178 btrfs_super_root_dir(root->fs_info->super_copy),
179 &location, BTRFS_FT_DIR, 0);
180 if (ret)
181 goto err;
182
183 ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
184 "default", 7, location.objectid,
185 BTRFS_ROOT_TREE_DIR_OBJECTID, 0);
186 if (ret)
187 goto err;
188
189 err:
190 return ret;
191 }
192
193 static int __recow_root(struct btrfs_trans_handle *trans,
194 struct btrfs_root *root)
195 {
196 struct extent_buffer *tmp;
197 int ret;
198
199 if (trans->transid != btrfs_root_generation(&root->root_item)) {
200 extent_buffer_get(root->node);
201 ret = __btrfs_cow_block(trans, root, root->node,
202 NULL, 0, &tmp, 0, 0);
203 if (ret)
204 return ret;
205 free_extent_buffer(tmp);
206 }
207
208 return 0;
209 }
210
211 static int recow_roots(struct btrfs_trans_handle *trans,
212 struct btrfs_root *root)
213 {
214 struct btrfs_fs_info *info = root->fs_info;
215 int ret;
216
217 ret = __recow_root(trans, info->fs_root);
218 if (ret)
219 return ret;
220 ret = __recow_root(trans, info->tree_root);
221 if (ret)
222 return ret;
223 ret = __recow_root(trans, info->extent_root);
224 if (ret)
225 return ret;
226 ret = __recow_root(trans, info->chunk_root);
227 if (ret)
228 return ret;
229 ret = __recow_root(trans, info->dev_root);
230 if (ret)
231 return ret;
232 ret = __recow_root(trans, info->csum_root);
233 if (ret)
234 return ret;
235
236 return 0;
237 }
238
239 static int create_one_raid_group(struct btrfs_trans_handle *trans,
240 struct btrfs_root *root, u64 type,
241 struct mkfs_allocation *allocation)
242
243 {
244 u64 chunk_start;
245 u64 chunk_size;
246 int ret;
247
248 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
249 &chunk_start, &chunk_size, type);
250 if (ret == -ENOSPC) {
251 error("not enough free space to allocate chunk");
252 exit(1);
253 }
254 if (ret)
255 return ret;
256
257 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
258 type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
259 chunk_start, chunk_size);
260
261 type &= BTRFS_BLOCK_GROUP_TYPE_MASK;
262 if (type == BTRFS_BLOCK_GROUP_DATA) {
263 allocation->data += chunk_size;
264 } else if (type == BTRFS_BLOCK_GROUP_METADATA) {
265 allocation->metadata += chunk_size;
266 } else if (type == BTRFS_BLOCK_GROUP_SYSTEM) {
267 allocation->system += chunk_size;
268 } else if (type ==
269 (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA)) {
270 allocation->mixed += chunk_size;
271 } else {
272 error("unrecognized profile type: 0x%llx",
273 (unsigned long long)type);
274 ret = -EINVAL;
275 }
276
277 return ret;
278 }
279
280 static int create_raid_groups(struct btrfs_trans_handle *trans,
281 struct btrfs_root *root, u64 data_profile,
282 u64 metadata_profile, int mixed,
283 struct mkfs_allocation *allocation)
284 {
285 int ret;
286
287 if (metadata_profile) {
288 u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA;
289
290 ret = create_one_raid_group(trans, root,
291 BTRFS_BLOCK_GROUP_SYSTEM |
292 metadata_profile, allocation);
293 if (ret)
294 return ret;
295
296 if (mixed)
297 meta_flags |= BTRFS_BLOCK_GROUP_DATA;
298
299 ret = create_one_raid_group(trans, root, meta_flags |
300 metadata_profile, allocation);
301 if (ret)
302 return ret;
303
304 }
305 if (!mixed && data_profile) {
306 ret = create_one_raid_group(trans, root,
307 BTRFS_BLOCK_GROUP_DATA |
308 data_profile, allocation);
309 if (ret)
310 return ret;
311 }
312 ret = recow_roots(trans, root);
313
314 return ret;
315 }
316
317 static int create_data_reloc_tree(struct btrfs_trans_handle *trans,
318 struct btrfs_root *root)
319 {
320 struct btrfs_key location;
321 struct btrfs_root_item root_item;
322 struct extent_buffer *tmp;
323 u64 objectid = BTRFS_DATA_RELOC_TREE_OBJECTID;
324 int ret;
325
326 ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
327 if (ret)
328 return ret;
329
330 memcpy(&root_item, &root->root_item, sizeof(root_item));
331 btrfs_set_root_bytenr(&root_item, tmp->start);
332 btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
333 btrfs_set_root_generation(&root_item, trans->transid);
334 free_extent_buffer(tmp);
335
336 location.objectid = objectid;
337 location.type = BTRFS_ROOT_ITEM_KEY;
338 location.offset = 0;
339 ret = btrfs_insert_root(trans, root->fs_info->tree_root,
340 &location, &root_item);
341
342 return ret;
343 }
344
345 static void print_usage(int ret)
346 {
347 printf("Usage: mkfs.btrfs [options] dev [ dev ... ]\n");
348 printf("Options:\n");
349 printf(" allocation profiles:\n");
350 printf("\t-d|--data PROFILE data profile, raid0, raid1, raid5, raid6, raid10, dup or single\n");
351 printf("\t-m|--metadata PROFILE metadata profile, values like for data profile\n");
352 printf("\t-M|--mixed mix metadata and data together\n");
353 printf(" features:\n");
354 printf("\t-n|--nodesize SIZE size of btree nodes\n");
355 printf("\t-s|--sectorsize SIZE data block size (may not be mountable by current kernel)\n");
356 printf("\t-O|--features LIST comma separated list of filesystem features (use '-O list-all' to list features)\n");
357 printf("\t-L|--label LABEL set the filesystem label\n");
358 printf("\t-U|--uuid UUID specify the filesystem UUID (must be unique)\n");
359 printf(" creation:\n");
360 printf("\t-b|--byte-count SIZE set filesystem size to SIZE (on the first device)\n");
361 printf("\t-r|--rootdir DIR copy files from DIR to the image root directory\n");
362 printf("\t-K|--nodiscard do not perform whole device TRIM\n");
363 printf("\t-f|--force force overwrite of existing filesystem\n");
364 printf(" general:\n");
365 printf("\t-q|--quiet no messages except errors\n");
366 printf("\t-V|--version print the mkfs.btrfs version and exit\n");
367 printf("\t--help print this help and exit\n");
368 printf(" deprecated:\n");
369 printf("\t-A|--alloc-start START the offset to start the filesytem\n");
370 printf("\t-l|--leafsize SIZE deprecated, alias for nodesize\n");
371 exit(ret);
372 }
373
374 static u64 parse_profile(const char *s)
375 {
376 if (strcasecmp(s, "raid0") == 0) {
377 return BTRFS_BLOCK_GROUP_RAID0;
378 } else if (strcasecmp(s, "raid1") == 0) {
379 return BTRFS_BLOCK_GROUP_RAID1;
380 } else if (strcasecmp(s, "raid5") == 0) {
381 return BTRFS_BLOCK_GROUP_RAID5;
382 } else if (strcasecmp(s, "raid6") == 0) {
383 return BTRFS_BLOCK_GROUP_RAID6;
384 } else if (strcasecmp(s, "raid10") == 0) {
385 return BTRFS_BLOCK_GROUP_RAID10;
386 } else if (strcasecmp(s, "dup") == 0) {
387 return BTRFS_BLOCK_GROUP_DUP;
388 } else if (strcasecmp(s, "single") == 0) {
389 return 0;
390 } else {
391 error("unknown profile %s", s);
392 exit(1);
393 }
394 /* not reached */
395 return 0;
396 }
397
398 static char *parse_label(const char *input)
399 {
400 int len = strlen(input);
401
402 if (len >= BTRFS_LABEL_SIZE) {
403 error("label %s is too long (max %d)", input,
404 BTRFS_LABEL_SIZE - 1);
405 exit(1);
406 }
407 return strdup(input);
408 }
409
410 static int add_directory_items(struct btrfs_trans_handle *trans,
411 struct btrfs_root *root, u64 objectid,
412 ino_t parent_inum, const char *name,
413 struct stat *st, int *dir_index_cnt)
414 {
415 int ret;
416 int name_len;
417 struct btrfs_key location;
418 u8 filetype = 0;
419
420 name_len = strlen(name);
421
422 location.objectid = objectid;
423 location.offset = 0;
424 location.type = BTRFS_INODE_ITEM_KEY;
425
426 if (S_ISDIR(st->st_mode))
427 filetype = BTRFS_FT_DIR;
428 if (S_ISREG(st->st_mode))
429 filetype = BTRFS_FT_REG_FILE;
430 if (S_ISLNK(st->st_mode))
431 filetype = BTRFS_FT_SYMLINK;
432
433 ret = btrfs_insert_dir_item(trans, root, name, name_len,
434 parent_inum, &location,
435 filetype, index_cnt);
436 if (ret)
437 return ret;
438 ret = btrfs_insert_inode_ref(trans, root, name, name_len,
439 objectid, parent_inum, index_cnt);
440 *dir_index_cnt = index_cnt;
441 index_cnt++;
442
443 return ret;
444 }
445
446 static int fill_inode_item(struct btrfs_trans_handle *trans,
447 struct btrfs_root *root,
448 struct btrfs_inode_item *dst, struct stat *src)
449 {
450 u64 blocks = 0;
451 u64 sectorsize = root->sectorsize;
452
453 /*
454 * btrfs_inode_item has some reserved fields
455 * and represents on-disk inode entry, so
456 * zero everything to prevent information leak
457 */
458 memset(dst, 0, sizeof (*dst));
459
460 btrfs_set_stack_inode_generation(dst, trans->transid);
461 btrfs_set_stack_inode_size(dst, src->st_size);
462 btrfs_set_stack_inode_nbytes(dst, 0);
463 btrfs_set_stack_inode_block_group(dst, 0);
464 btrfs_set_stack_inode_nlink(dst, src->st_nlink);
465 btrfs_set_stack_inode_uid(dst, src->st_uid);
466 btrfs_set_stack_inode_gid(dst, src->st_gid);
467 btrfs_set_stack_inode_mode(dst, src->st_mode);
468 btrfs_set_stack_inode_rdev(dst, 0);
469 btrfs_set_stack_inode_flags(dst, 0);
470 btrfs_set_stack_timespec_sec(&dst->atime, src->st_atime);
471 btrfs_set_stack_timespec_nsec(&dst->atime, 0);
472 btrfs_set_stack_timespec_sec(&dst->ctime, src->st_ctime);
473 btrfs_set_stack_timespec_nsec(&dst->ctime, 0);
474 btrfs_set_stack_timespec_sec(&dst->mtime, src->st_mtime);
475 btrfs_set_stack_timespec_nsec(&dst->mtime, 0);
476 btrfs_set_stack_timespec_sec(&dst->otime, 0);
477 btrfs_set_stack_timespec_nsec(&dst->otime, 0);
478
479 if (S_ISDIR(src->st_mode)) {
480 btrfs_set_stack_inode_size(dst, 0);
481 btrfs_set_stack_inode_nlink(dst, 1);
482 }
483 if (S_ISREG(src->st_mode)) {
484 btrfs_set_stack_inode_size(dst, (u64)src->st_size);
485 if (src->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root))
486 btrfs_set_stack_inode_nbytes(dst, src->st_size);
487 else {
488 blocks = src->st_size / sectorsize;
489 if (src->st_size % sectorsize)
490 blocks += 1;
491 blocks *= sectorsize;
492 btrfs_set_stack_inode_nbytes(dst, blocks);
493 }
494 }
495 if (S_ISLNK(src->st_mode))
496 btrfs_set_stack_inode_nbytes(dst, src->st_size + 1);
497
498 return 0;
499 }
500
501 static int directory_select(const struct direct *entry)
502 {
503 if (entry->d_name[0] == '.' &&
504 (entry->d_name[1] == 0 ||
505 (entry->d_name[1] == '.' && entry->d_name[2] == 0)))
506 return 0;
507 return 1;
508 }
509
510 static void free_namelist(struct direct **files, int count)
511 {
512 int i;
513
514 if (count < 0)
515 return;
516
517 for (i = 0; i < count; ++i)
518 free(files[i]);
519 free(files);
520 }
521
522 static u64 calculate_dir_inode_size(const char *dirname)
523 {
524 int count, i;
525 struct direct **files, *cur_file;
526 u64 dir_inode_size = 0;
527
528 count = scandir(dirname, &files, directory_select, NULL);
529
530 for (i = 0; i < count; i++) {
531 cur_file = files[i];
532 dir_inode_size += strlen(cur_file->d_name);
533 }
534
535 free_namelist(files, count);
536
537 dir_inode_size *= 2;
538 return dir_inode_size;
539 }
540
541 static int add_inode_items(struct btrfs_trans_handle *trans,
542 struct btrfs_root *root,
543 struct stat *st, const char *name,
544 u64 self_objectid, ino_t parent_inum,
545 int dir_index_cnt, struct btrfs_inode_item *inode_ret)
546 {
547 int ret;
548 struct btrfs_inode_item btrfs_inode;
549 u64 objectid;
550 u64 inode_size = 0;
551
552 fill_inode_item(trans, root, &btrfs_inode, st);
553 objectid = self_objectid;
554
555 if (S_ISDIR(st->st_mode)) {
556 inode_size = calculate_dir_inode_size(name);
557 btrfs_set_stack_inode_size(&btrfs_inode, inode_size);
558 }
559
560 ret = btrfs_insert_inode(trans, root, objectid, &btrfs_inode);
561
562 *inode_ret = btrfs_inode;
563 return ret;
564 }
565
566 static int add_xattr_item(struct btrfs_trans_handle *trans,
567 struct btrfs_root *root, u64 objectid,
568 const char *file_name)
569 {
570 int ret;
571 int cur_name_len;
572 char xattr_list[XATTR_LIST_MAX];
573 char *cur_name;
574 char cur_value[XATTR_SIZE_MAX];
575 char delimiter = '\0';
576 char *next_location = xattr_list;
577
578 ret = llistxattr(file_name, xattr_list, XATTR_LIST_MAX);
579 if (ret < 0) {
580 if(errno == ENOTSUP)
581 return 0;
582 error("getting a list of xattr failed for %s: %s", file_name,
583 strerror(errno));
584 return ret;
585 }
586 if (ret == 0)
587 return ret;
588
589 cur_name = strtok(xattr_list, &delimiter);
590 while (cur_name != NULL) {
591 cur_name_len = strlen(cur_name);
592 next_location += cur_name_len + 1;
593
594 ret = getxattr(file_name, cur_name, cur_value, XATTR_SIZE_MAX);
595 if (ret < 0) {
596 if(errno == ENOTSUP)
597 return 0;
598 error("gettig a xattr value failed for %s attr %s: %s",
599 file_name, cur_name, strerror(errno));
600 return ret;
601 }
602
603 ret = btrfs_insert_xattr_item(trans, root, cur_name,
604 cur_name_len, cur_value,
605 ret, objectid);
606 if (ret) {
607 error("inserting a xattr item failed for %s: %s",
608 file_name, strerror(-ret));
609 }
610
611 cur_name = strtok(next_location, &delimiter);
612 }
613
614 return ret;
615 }
616
617 static int add_symbolic_link(struct btrfs_trans_handle *trans,
618 struct btrfs_root *root,
619 u64 objectid, const char *path_name)
620 {
621 int ret;
622 char buf[PATH_MAX];
623
624 ret = readlink(path_name, buf, sizeof(buf));
625 if (ret <= 0) {
626 error("readlink failed for %s: %s", path_name, strerror(errno));
627 goto fail;
628 }
629 if (ret >= sizeof(buf)) {
630 error("symlink too long for %s", path_name);
631 ret = -1;
632 goto fail;
633 }
634
635 buf[ret] = '\0'; /* readlink does not do it for us */
636 ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
637 buf, ret + 1);
638 fail:
639 return ret;
640 }
641
642 static int add_file_items(struct btrfs_trans_handle *trans,
643 struct btrfs_root *root,
644 struct btrfs_inode_item *btrfs_inode, u64 objectid,
645 ino_t parent_inum, struct stat *st,
646 const char *path_name, int out_fd)
647 {
648 int ret = -1;
649 ssize_t ret_read;
650 u64 bytes_read = 0;
651 struct btrfs_key key;
652 int blocks;
653 u32 sectorsize = root->sectorsize;
654 u64 first_block = 0;
655 u64 file_pos = 0;
656 u64 cur_bytes;
657 u64 total_bytes;
658 struct extent_buffer *eb = NULL;
659 int fd;
660
661 if (st->st_size == 0)
662 return 0;
663
664 fd = open(path_name, O_RDONLY);
665 if (fd == -1) {
666 error("cannot open %s: %s", path_name, strerror(errno));
667 return ret;
668 }
669
670 blocks = st->st_size / sectorsize;
671 if (st->st_size % sectorsize)
672 blocks += 1;
673
674 if (st->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root)) {
675 char *buffer = malloc(st->st_size);
676
677 if (!buffer) {
678 ret = -ENOMEM;
679 goto end;
680 }
681
682 ret_read = pread64(fd, buffer, st->st_size, bytes_read);
683 if (ret_read == -1) {
684 error("cannot read %s at offset %llu length %llu: %s",
685 path_name, (unsigned long long)bytes_read,
686 (unsigned long long)st->st_size,
687 strerror(errno));
688 free(buffer);
689 goto end;
690 }
691
692 ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
693 buffer, st->st_size);
694 free(buffer);
695 goto end;
696 }
697
698 /* round up our st_size to the FS blocksize */
699 total_bytes = (u64)blocks * sectorsize;
700
701 /*
702 * do our IO in extent buffers so it can work
703 * against any raid type
704 */
705 eb = calloc(1, sizeof(*eb) + sectorsize);
706 if (!eb) {
707 ret = -ENOMEM;
708 goto end;
709 }
710
711 again:
712
713 /*
714 * keep our extent size at 1MB max, this makes it easier to work inside
715 * the tiny block groups created during mkfs
716 */
717 cur_bytes = min(total_bytes, 1024ULL * 1024);
718 ret = btrfs_reserve_extent(trans, root, cur_bytes, 0, 0, (u64)-1,
719 &key, 1);
720 if (ret)
721 goto end;
722
723 first_block = key.objectid;
724 bytes_read = 0;
725
726 while (bytes_read < cur_bytes) {
727
728 memset(eb->data, 0, sectorsize);
729
730 ret_read = pread64(fd, eb->data, sectorsize, file_pos + bytes_read);
731 if (ret_read == -1) {
732 error("cannot read %s at offset %llu length %llu: %s",
733 path_name,
734 (unsigned long long)file_pos + bytes_read,
735 (unsigned long long)sectorsize,
736 strerror(errno));
737 goto end;
738 }
739
740 eb->start = first_block + bytes_read;
741 eb->len = sectorsize;
742
743 /*
744 * we're doing the csum before we record the extent, but
745 * that's ok
746 */
747 ret = btrfs_csum_file_block(trans, root->fs_info->csum_root,
748 first_block + bytes_read + sectorsize,
749 first_block + bytes_read,
750 eb->data, sectorsize);
751 if (ret)
752 goto end;
753
754 ret = write_and_map_eb(trans, root, eb);
755 if (ret) {
756 error("failed to write %s", path_name);
757 goto end;
758 }
759
760 bytes_read += sectorsize;
761 }
762
763 if (bytes_read) {
764 ret = btrfs_record_file_extent(trans, root, objectid, btrfs_inode,
765 file_pos, first_block, cur_bytes);
766 if (ret)
767 goto end;
768
769 }
770
771 file_pos += cur_bytes;
772 total_bytes -= cur_bytes;
773
774 if (total_bytes)
775 goto again;
776
777 end:
778 free(eb);
779 close(fd);
780 return ret;
781 }
782
783 static char *make_path(const char *dir, const char *name)
784 {
785 char *path;
786
787 path = malloc(strlen(dir) + strlen(name) + 2);
788 if (!path)
789 return NULL;
790 strcpy(path, dir);
791 if (dir[strlen(dir) - 1] != '/')
792 strcat(path, "/");
793 strcat(path, name);
794 return path;
795 }
796
797 static int traverse_directory(struct btrfs_trans_handle *trans,
798 struct btrfs_root *root, const char *dir_name,
799 struct directory_name_entry *dir_head, int out_fd)
800 {
801 int ret = 0;
802
803 struct btrfs_inode_item cur_inode;
804 struct btrfs_inode_item *inode_item;
805 int count, i, dir_index_cnt;
806 struct direct **files;
807 struct stat st;
808 struct directory_name_entry *dir_entry, *parent_dir_entry;
809 struct direct *cur_file;
810 ino_t parent_inum, cur_inum;
811 ino_t highest_inum = 0;
812 const char *parent_dir_name;
813 char real_path[PATH_MAX];
814 struct btrfs_path path;
815 struct extent_buffer *leaf;
816 struct btrfs_key root_dir_key;
817 u64 root_dir_inode_size = 0;
818
819 /* Add list for source directory */
820 dir_entry = malloc(sizeof(struct directory_name_entry));
821 if (!dir_entry)
822 return -ENOMEM;
823 dir_entry->dir_name = dir_name;
824 dir_entry->path = realpath(dir_name, real_path);
825 if (!dir_entry->path) {
826 error("realpath failed for %s: %s", dir_name, strerror(errno));
827 ret = -1;
828 goto fail_no_dir;
829 }
830
831 parent_inum = highest_inum + BTRFS_FIRST_FREE_OBJECTID;
832 dir_entry->inum = parent_inum;
833 list_add_tail(&dir_entry->list, &dir_head->list);
834
835 btrfs_init_path(&path);
836
837 root_dir_key.objectid = btrfs_root_dirid(&root->root_item);
838 root_dir_key.offset = 0;
839 root_dir_key.type = BTRFS_INODE_ITEM_KEY;
840 ret = btrfs_lookup_inode(trans, root, &path, &root_dir_key, 1);
841 if (ret) {
842 error("failed to lookup root dir: %d", ret);
843 goto fail_no_dir;
844 }
845
846 leaf = path.nodes[0];
847 inode_item = btrfs_item_ptr(leaf, path.slots[0],
848 struct btrfs_inode_item);
849
850 root_dir_inode_size = calculate_dir_inode_size(dir_name);
851 btrfs_set_inode_size(leaf, inode_item, root_dir_inode_size);
852 btrfs_mark_buffer_dirty(leaf);
853
854 btrfs_release_path(&path);
855
856 do {
857 parent_dir_entry = list_entry(dir_head->list.next,
858 struct directory_name_entry,
859 list);
860 list_del(&parent_dir_entry->list);
861
862 parent_inum = parent_dir_entry->inum;
863 parent_dir_name = parent_dir_entry->dir_name;
864 if (chdir(parent_dir_entry->path)) {
865 error("chdir failed for %s: %s",
866 parent_dir_name, strerror(errno));
867 ret = -1;
868 goto fail_no_files;
869 }
870
871 count = scandir(parent_dir_entry->path, &files,
872 directory_select, NULL);
873 if (count == -1)
874 {
875 error("scandir failed for %s: %s",
876 parent_dir_name, strerror (errno));
877 ret = -1;
878 goto fail;
879 }
880
881 for (i = 0; i < count; i++) {
882 cur_file = files[i];
883
884 if (lstat(cur_file->d_name, &st) == -1) {
885 error("lstat failed for %s: %s",
886 cur_file->d_name, strerror(errno));
887 ret = -1;
888 goto fail;
889 }
890
891 cur_inum = st.st_ino;
892 ret = add_directory_items(trans, root,
893 cur_inum, parent_inum,
894 cur_file->d_name,
895 &st, &dir_index_cnt);
896 if (ret) {
897 error("unable to add directory items for %s: %d",
898 cur_file->d_name, ret);
899 goto fail;
900 }
901
902 ret = add_inode_items(trans, root, &st,
903 cur_file->d_name, cur_inum,
904 parent_inum, dir_index_cnt,
905 &cur_inode);
906 if (ret == -EEXIST) {
907 if (st.st_nlink <= 1) {
908 error(
909 "item %s already exists but has wrong st_nlink %lu <= 1",
910 cur_file->d_name,
911 (unsigned long)st.st_nlink);
912 goto fail;
913 }
914 continue;
915 }
916 if (ret) {
917 error("unable to add inode items for %s: %d",
918 cur_file->d_name, ret);
919 goto fail;
920 }
921
922 ret = add_xattr_item(trans, root,
923 cur_inum, cur_file->d_name);
924 if (ret) {
925 error("unable to add xattr items for %s: %d",
926 cur_file->d_name, ret);
927 if(ret != -ENOTSUP)
928 goto fail;
929 }
930
931 if (S_ISDIR(st.st_mode)) {
932 dir_entry = malloc(sizeof(struct directory_name_entry));
933 if (!dir_entry) {
934 ret = -ENOMEM;
935 goto fail;
936 }
937 dir_entry->dir_name = cur_file->d_name;
938 dir_entry->path = make_path(parent_dir_entry->path,
939 cur_file->d_name);
940 dir_entry->inum = cur_inum;
941 list_add_tail(&dir_entry->list, &dir_head->list);
942 } else if (S_ISREG(st.st_mode)) {
943 ret = add_file_items(trans, root, &cur_inode,
944 cur_inum, parent_inum, &st,
945 cur_file->d_name, out_fd);
946 if (ret) {
947 error("unable to add file items for %s: %d",
948 cur_file->d_name, ret);
949 goto fail;
950 }
951 } else if (S_ISLNK(st.st_mode)) {
952 ret = add_symbolic_link(trans, root,
953 cur_inum, cur_file->d_name);
954 if (ret) {
955 error("unable to add symlink for %s: %d",
956 cur_file->d_name, ret);
957 goto fail;
958 }
959 }
960 }
961
962 free_namelist(files, count);
963 free(parent_dir_entry);
964
965 index_cnt = 2;
966
967 } while (!list_empty(&dir_head->list));
968
969 out:
970 return !!ret;
971 fail:
972 free_namelist(files, count);
973 fail_no_files:
974 free(parent_dir_entry);
975 goto out;
976 fail_no_dir:
977 free(dir_entry);
978 goto out;
979 }
980
981 static int create_chunks(struct btrfs_trans_handle *trans,
982 struct btrfs_root *root, u64 num_of_meta_chunks,
983 u64 size_of_data,
984 struct mkfs_allocation *allocation)
985 {
986 u64 chunk_start;
987 u64 chunk_size;
988 u64 meta_type = BTRFS_BLOCK_GROUP_METADATA;
989 u64 data_type = BTRFS_BLOCK_GROUP_DATA;
990 u64 minimum_data_chunk_size = 8 * 1024 * 1024;
991 u64 i;
992 int ret;
993
994 for (i = 0; i < num_of_meta_chunks; i++) {
995 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
996 &chunk_start, &chunk_size, meta_type);
997 if (ret)
998 return ret;
999 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1000 meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1001 chunk_start, chunk_size);
1002 allocation->metadata += chunk_size;
1003 if (ret)
1004 return ret;
1005 set_extent_dirty(&root->fs_info->free_space_cache,
1006 chunk_start, chunk_start + chunk_size - 1, 0);
1007 }
1008
1009 if (size_of_data < minimum_data_chunk_size)
1010 size_of_data = minimum_data_chunk_size;
1011
1012 ret = btrfs_alloc_data_chunk(trans, root->fs_info->extent_root,
1013 &chunk_start, size_of_data, data_type, 0);
1014 if (ret)
1015 return ret;
1016 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1017 data_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1018 chunk_start, size_of_data);
1019 allocation->data += size_of_data;
1020 if (ret)
1021 return ret;
1022 set_extent_dirty(&root->fs_info->free_space_cache,
1023 chunk_start, chunk_start + size_of_data - 1, 0);
1024 return ret;
1025 }
1026
1027 static int make_image(const char *source_dir, struct btrfs_root *root,
1028 int out_fd)
1029 {
1030 int ret;
1031 struct btrfs_trans_handle *trans;
1032 struct stat root_st;
1033 struct directory_name_entry dir_head;
1034 struct directory_name_entry *dir_entry = NULL;
1035
1036 ret = lstat(source_dir, &root_st);
1037 if (ret) {
1038 error("unable to lstat %s: %s", source_dir, strerror(errno));
1039 ret = -errno;
1040 goto out;
1041 }
1042
1043 INIT_LIST_HEAD(&dir_head.list);
1044
1045 trans = btrfs_start_transaction(root, 1);
1046 ret = traverse_directory(trans, root, source_dir, &dir_head, out_fd);
1047 if (ret) {
1048 error("unable to traverse directory %s: %d", source_dir, ret);
1049 goto fail;
1050 }
1051 ret = btrfs_commit_transaction(trans, root);
1052 if (ret) {
1053 error("transaction commit failed: %d", ret);
1054 goto out;
1055 }
1056
1057 if (verbose)
1058 printf("Making image is completed.\n");
1059 return 0;
1060 fail:
1061 while (!list_empty(&dir_head.list)) {
1062 dir_entry = list_entry(dir_head.list.next,
1063 struct directory_name_entry, list);
1064 list_del(&dir_entry->list);
1065 free(dir_entry);
1066 }
1067 out:
1068 return ret;
1069 }
1070
1071 /*
1072 * This ignores symlinks with unreadable targets and subdirs that can't
1073 * be read. It's a best-effort to give a rough estimate of the size of
1074 * a subdir. It doesn't guarantee that prepopulating btrfs from this
1075 * tree won't still run out of space.
1076 */
1077 static u64 global_total_size;
1078 static u64 fs_block_size;
1079 static int ftw_add_entry_size(const char *fpath, const struct stat *st,
1080 int type)
1081 {
1082 if (type == FTW_F || type == FTW_D)
1083 global_total_size += round_up(st->st_size, fs_block_size);
1084
1085 return 0;
1086 }
1087
1088 static u64 size_sourcedir(const char *dir_name, u64 sectorsize,
1089 u64 *num_of_meta_chunks_ret, u64 *size_of_data_ret)
1090 {
1091 u64 dir_size = 0;
1092 u64 total_size = 0;
1093 int ret;
1094 u64 default_chunk_size = 8 * 1024 * 1024; /* 8MB */
1095 u64 allocated_meta_size = 8 * 1024 * 1024; /* 8MB */
1096 u64 allocated_total_size = 20 * 1024 * 1024; /* 20MB */
1097 u64 num_of_meta_chunks = 0;
1098 u64 num_of_data_chunks = 0;
1099 u64 num_of_allocated_meta_chunks =
1100 allocated_meta_size / default_chunk_size;
1101
1102 global_total_size = 0;
1103 fs_block_size = sectorsize;
1104 ret = ftw(dir_name, ftw_add_entry_size, 10);
1105 dir_size = global_total_size;
1106 if (ret < 0) {
1107 error("ftw subdir walk of %s failed: %s", dir_name,
1108 strerror(errno));
1109 exit(1);
1110 }
1111
1112 num_of_data_chunks = (dir_size + default_chunk_size - 1) /
1113 default_chunk_size;
1114
1115 num_of_meta_chunks = (dir_size / 2) / default_chunk_size;
1116 if (((dir_size / 2) % default_chunk_size) != 0)
1117 num_of_meta_chunks++;
1118 if (num_of_meta_chunks <= num_of_allocated_meta_chunks)
1119 num_of_meta_chunks = 0;
1120 else
1121 num_of_meta_chunks -= num_of_allocated_meta_chunks;
1122
1123 total_size = allocated_total_size +
1124 (num_of_data_chunks * default_chunk_size) +
1125 (num_of_meta_chunks * default_chunk_size);
1126
1127 *num_of_meta_chunks_ret = num_of_meta_chunks;
1128 *size_of_data_ret = num_of_data_chunks * default_chunk_size;
1129 return total_size;
1130 }
1131
1132 static int zero_output_file(int out_fd, u64 size)
1133 {
1134 int loop_num;
1135 u64 location = 0;
1136 char buf[4096];
1137 int ret = 0, i;
1138 ssize_t written;
1139
1140 memset(buf, 0, 4096);
1141 loop_num = size / 4096;
1142 for (i = 0; i < loop_num; i++) {
1143 written = pwrite64(out_fd, buf, 4096, location);
1144 if (written != 4096)
1145 ret = -EIO;
1146 location += 4096;
1147 }
1148 return ret;
1149 }
1150
1151 static int is_ssd(const char *file)
1152 {
1153 blkid_probe probe;
1154 char wholedisk[PATH_MAX];
1155 char sysfs_path[PATH_MAX];
1156 dev_t devno;
1157 int fd;
1158 char rotational;
1159 int ret;
1160
1161 probe = blkid_new_probe_from_filename(file);
1162 if (!probe)
1163 return 0;
1164
1165 /* Device number of this disk (possibly a partition) */
1166 devno = blkid_probe_get_devno(probe);
1167 if (!devno) {
1168 blkid_free_probe(probe);
1169 return 0;
1170 }
1171
1172 /* Get whole disk name (not full path) for this devno */
1173 ret = blkid_devno_to_wholedisk(devno,
1174 wholedisk, sizeof(wholedisk), NULL);
1175 if (ret) {
1176 blkid_free_probe(probe);
1177 return 0;
1178 }
1179
1180 snprintf(sysfs_path, PATH_MAX, "/sys/block/%s/queue/rotational",
1181 wholedisk);
1182
1183 blkid_free_probe(probe);
1184
1185 fd = open(sysfs_path, O_RDONLY);
1186 if (fd < 0) {
1187 return 0;
1188 }
1189
1190 if (read(fd, &rotational, 1) < 1) {
1191 close(fd);
1192 return 0;
1193 }
1194 close(fd);
1195
1196 return rotational == '0';
1197 }
1198
1199 static int _cmp_device_by_id(void *priv, struct list_head *a,
1200 struct list_head *b)
1201 {
1202 return list_entry(a, struct btrfs_device, dev_list)->devid -
1203 list_entry(b, struct btrfs_device, dev_list)->devid;
1204 }
1205
1206 static void list_all_devices(struct btrfs_root *root)
1207 {
1208 struct btrfs_fs_devices *fs_devices;
1209 struct btrfs_device *device;
1210 int number_of_devices = 0;
1211 u64 total_block_count = 0;
1212
1213 fs_devices = root->fs_info->fs_devices;
1214
1215 list_for_each_entry(device, &fs_devices->devices, dev_list)
1216 number_of_devices++;
1217
1218 list_sort(NULL, &fs_devices->devices, _cmp_device_by_id);
1219
1220 printf("Number of devices: %d\n", number_of_devices);
1221 /* printf("Total devices size: %10s\n", */
1222 /* pretty_size(total_block_count)); */
1223 printf("Devices:\n");
1224 printf(" ID SIZE PATH\n");
1225 list_for_each_entry(device, &fs_devices->devices, dev_list) {
1226 printf(" %3llu %10s %s\n",
1227 device->devid,
1228 pretty_size(device->total_bytes),
1229 device->name);
1230 total_block_count += device->total_bytes;
1231 }
1232
1233 printf("\n");
1234 }
1235
1236 static int is_temp_block_group(struct extent_buffer *node,
1237 struct btrfs_block_group_item *bgi,
1238 u64 data_profile, u64 meta_profile,
1239 u64 sys_profile)
1240 {
1241 u64 flag = btrfs_disk_block_group_flags(node, bgi);
1242 u64 flag_type = flag & BTRFS_BLOCK_GROUP_TYPE_MASK;
1243 u64 flag_profile = flag & BTRFS_BLOCK_GROUP_PROFILE_MASK;
1244 u64 used = btrfs_disk_block_group_used(node, bgi);
1245
1246 /*
1247 * Chunks meets all the following conditions is a temp chunk
1248 * 1) Empty chunk
1249 * Temp chunk is always empty.
1250 *
1251 * 2) profile mismatch with mkfs profile.
1252 * Temp chunk is always in SINGLE
1253 *
1254 * 3) Size differs with mkfs_alloc
1255 * Special case for SINGLE/SINGLE btrfs.
1256 * In that case, temp data chunk and real data chunk are always empty.
1257 * So we need to use mkfs_alloc to be sure which chunk is the newly
1258 * allocated.
1259 *
1260 * Normally, new chunk size is equal to mkfs one (One chunk)
1261 * If it has multiple chunks, we just refuse to delete any one.
1262 * As they are all single, so no real problem will happen.
1263 * So only use condition 1) and 2) to judge them.
1264 */
1265 if (used != 0)
1266 return 0;
1267 switch (flag_type) {
1268 case BTRFS_BLOCK_GROUP_DATA:
1269 case BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA:
1270 data_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
1271 if (flag_profile != data_profile)
1272 return 1;
1273 break;
1274 case BTRFS_BLOCK_GROUP_METADATA:
1275 meta_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
1276 if (flag_profile != meta_profile)
1277 return 1;
1278 break;
1279 case BTRFS_BLOCK_GROUP_SYSTEM:
1280 sys_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
1281 if (flag_profile != sys_profile)
1282 return 1;
1283 break;
1284 }
1285 return 0;
1286 }
1287
1288 /* Note: if current is a block group, it will skip it anyway */
1289 static int next_block_group(struct btrfs_root *root,
1290 struct btrfs_path *path)
1291 {
1292 struct btrfs_key key;
1293 int ret = 0;
1294
1295 while (1) {
1296 ret = btrfs_next_item(root, path);
1297 if (ret)
1298 goto out;
1299
1300 btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
1301 if (key.type == BTRFS_BLOCK_GROUP_ITEM_KEY)
1302 goto out;
1303 }
1304 out:
1305 return ret;
1306 }
1307
1308 /* This function will cleanup */
1309 static int cleanup_temp_chunks(struct btrfs_fs_info *fs_info,
1310 struct mkfs_allocation *alloc,
1311 u64 data_profile, u64 meta_profile,
1312 u64 sys_profile)
1313 {
1314 struct btrfs_trans_handle *trans = NULL;
1315 struct btrfs_block_group_item *bgi;
1316 struct btrfs_root *root = fs_info->extent_root;
1317 struct btrfs_key key;
1318 struct btrfs_key found_key;
1319 struct btrfs_path path;
1320 int ret = 0;
1321
1322 btrfs_init_path(&path);
1323 trans = btrfs_start_transaction(root, 1);
1324
1325 key.objectid = 0;
1326 key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
1327 key.offset = 0;
1328
1329 while (1) {
1330 /*
1331 * as the rest of the loop may modify the tree, we need to
1332 * start a new search each time.
1333 */
1334 ret = btrfs_search_slot(trans, root, &key, &path, 0, 0);
1335 if (ret < 0)
1336 goto out;
1337
1338 btrfs_item_key_to_cpu(path.nodes[0], &found_key,
1339 path.slots[0]);
1340 if (found_key.objectid < key.objectid)
1341 goto out;
1342 if (found_key.type != BTRFS_BLOCK_GROUP_ITEM_KEY) {
1343 ret = next_block_group(root, &path);
1344 if (ret < 0)
1345 goto out;
1346 if (ret > 0) {
1347 ret = 0;
1348 goto out;
1349 }
1350 btrfs_item_key_to_cpu(path.nodes[0], &found_key,
1351 path.slots[0]);
1352 }
1353
1354 bgi = btrfs_item_ptr(path.nodes[0], path.slots[0],
1355 struct btrfs_block_group_item);
1356 if (is_temp_block_group(path.nodes[0], bgi,
1357 data_profile, meta_profile,
1358 sys_profile)) {
1359 u64 flags = btrfs_disk_block_group_flags(path.nodes[0],
1360 bgi);
1361
1362 ret = btrfs_free_block_group(trans, fs_info,
1363 found_key.objectid, found_key.offset);
1364 if (ret < 0)
1365 goto out;
1366
1367 if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
1368 BTRFS_BLOCK_GROUP_DATA)
1369 alloc->data -= found_key.offset;
1370 else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
1371 BTRFS_BLOCK_GROUP_METADATA)
1372 alloc->metadata -= found_key.offset;
1373 else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
1374 BTRFS_BLOCK_GROUP_SYSTEM)
1375 alloc->system -= found_key.offset;
1376 else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
1377 (BTRFS_BLOCK_GROUP_METADATA |
1378 BTRFS_BLOCK_GROUP_DATA))
1379 alloc->mixed -= found_key.offset;
1380 }
1381 btrfs_release_path(&path);
1382 key.objectid = found_key.objectid + found_key.offset;
1383 }
1384 out:
1385 if (trans)
1386 btrfs_commit_transaction(trans, root);
1387 btrfs_release_path(&path);
1388 return ret;
1389 }
1390
1391 int main(int argc, char **argv)
1392 {
1393 char *file;
1394 struct btrfs_root *root;
1395 struct btrfs_fs_info *fs_info;
1396 struct btrfs_trans_handle *trans;
1397 char *label = NULL;
1398 u64 block_count = 0;
1399 u64 dev_block_count = 0;
1400 u64 blocks[7];
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 case 'n':
1472 nodesize = parse_size(optarg);
1473 nodesize_forced = 1;
1474 break;
1475 case 'L':
1476 label = parse_label(optarg);
1477 break;
1478 case 'm':
1479 metadata_profile = parse_profile(optarg);
1480 metadata_profile_opt = 1;
1481 break;
1482 case 'M':
1483 mixed = 1;
1484 break;
1485 case 'O': {
1486 char *orig = strdup(optarg);
1487 char *tmp = orig;
1488
1489 tmp = btrfs_parse_fs_features(tmp, &features);
1490 if (tmp) {
1491 error("unrecognized filesystem feature '%s'",
1492 tmp);
1493 free(orig);
1494 exit(1);
1495 }
1496 free(orig);
1497 if (features & BTRFS_FEATURE_LIST_ALL) {
1498 btrfs_list_all_fs_features(0);
1499 exit(0);
1500 }
1501 break;
1502 }
1503 case 's':
1504 sectorsize = parse_size(optarg);
1505 break;
1506 case 'b':
1507 block_count = parse_size(optarg);
1508 zero_end = 0;
1509 break;
1510 case 'V':
1511 printf("mkfs.btrfs, part of %s\n",
1512 PACKAGE_STRING);
1513 exit(0);
1514 break;
1515 case 'r':
1516 source_dir = optarg;
1517 source_dir_set = 1;
1518 break;
1519 case 'U':
1520 strncpy(fs_uuid, optarg,
1521 BTRFS_UUID_UNPARSED_SIZE - 1);
1522 break;
1523 case 'K':
1524 discard = 0;
1525 break;
1526 case 'q':
1527 verbose = 0;
1528 break;
1529 case GETOPT_VAL_HELP:
1530 default:
1531 print_usage(c != GETOPT_VAL_HELP);
1532 }
1533 }
1534
1535 if (verbose) {
1536 printf("%s\n", PACKAGE_STRING);
1537 printf("See %s for more information.\n\n", PACKAGE_URL);
1538 }
1539
1540 sectorsize = max(sectorsize, (u32)sysconf(_SC_PAGESIZE));
1541 stripesize = sectorsize;
1542 saved_optind = optind;
1543 dev_cnt = argc - optind;
1544 if (dev_cnt == 0)
1545 print_usage(1);
1546
1547 if (source_dir_set && dev_cnt > 1) {
1548 error("the option -r is limited to a single device");
1549 exit(1);
1550 }
1551
1552 if (*fs_uuid) {
1553 uuid_t dummy_uuid;
1554
1555 if (uuid_parse(fs_uuid, dummy_uuid) != 0) {
1556 error("could not parse UUID: %s", fs_uuid);
1557 exit(1);
1558 }
1559 if (!test_uuid_unique(fs_uuid)) {
1560 error("non-unique UUID: %s", fs_uuid);
1561 exit(1);
1562 }
1563 }
1564
1565 while (dev_cnt-- > 0) {
1566 file = argv[optind++];
1567 if (is_block_device(file) == 1)
1568 if (test_dev_for_mkfs(file, force_overwrite))
1569 exit(1);
1570 }
1571
1572 optind = saved_optind;
1573 dev_cnt = argc - optind;
1574
1575 file = argv[optind++];
1576 ssd = is_ssd(file);
1577
1578 /*
1579 * Set default profiles according to number of added devices.
1580 * For mixed groups defaults are single/single.
1581 */
1582 if (!mixed) {
1583 if (!metadata_profile_opt) {
1584 if (dev_cnt == 1 && ssd && verbose)
1585 printf("Detected a SSD, turning off metadata "
1586 "duplication. Mkfs with -m dup if you want to "
1587 "force metadata duplication.\n");
1588
1589 metadata_profile = (dev_cnt > 1) ?
1590 BTRFS_BLOCK_GROUP_RAID1 : (ssd) ?
1591 0: BTRFS_BLOCK_GROUP_DUP;
1592 }
1593 if (!data_profile_opt) {
1594 data_profile = (dev_cnt > 1) ?
1595 BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */
1596 }
1597 } else {
1598 u32 best_nodesize = max_t(u32, sysconf(_SC_PAGESIZE), sectorsize);
1599
1600 if (metadata_profile_opt || data_profile_opt) {
1601 if (metadata_profile != data_profile) {
1602 error(
1603 "with mixed block groups data and metadata profiles must be the same");
1604 exit(1);
1605 }
1606 }
1607
1608 if (!nodesize_forced)
1609 nodesize = best_nodesize;
1610 }
1611
1612 /*
1613 * FS features that can be set by other means than -O
1614 * just set the bit here
1615 */
1616 if (mixed)
1617 features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
1618
1619 if ((data_profile | metadata_profile) &
1620 (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
1621 features |= BTRFS_FEATURE_INCOMPAT_RAID56;
1622 }
1623
1624 if (btrfs_check_nodesize(nodesize, sectorsize,
1625 features))
1626 exit(1);
1627
1628 if (sectorsize < sizeof(struct btrfs_super_block)) {
1629 error("sectorsize smaller than superblock: %u < %zu",
1630 sectorsize, sizeof(struct btrfs_super_block));
1631 exit(1);
1632 }
1633
1634 /* Check device/block_count after the nodesize is determined */
1635 if (block_count && block_count < btrfs_min_dev_size(nodesize)) {
1636 error("size %llu is too small to make a usable filesystem",
1637 block_count);
1638 error("minimum size for btrfs filesystem is %llu",
1639 btrfs_min_dev_size(nodesize));
1640 exit(1);
1641 }
1642 for (i = saved_optind; i < saved_optind + dev_cnt; i++) {
1643 char *path;
1644
1645 path = argv[i];
1646 ret = test_minimum_size(path, nodesize);
1647 if (ret < 0) {
1648 error("failed to check size for %s: %s",
1649 path, strerror(-ret));
1650 exit (1);
1651 }
1652 if (ret > 0) {
1653 error("'%s' is too small to make a usable filesystem",
1654 path);
1655 error("minimum size for each btrfs device is %llu",
1656 btrfs_min_dev_size(nodesize));
1657 exit(1);
1658 }
1659 }
1660 ret = test_num_disk_vs_raid(metadata_profile, data_profile,
1661 dev_cnt, mixed, ssd);
1662 if (ret)
1663 exit(1);
1664
1665 dev_cnt--;
1666
1667 if (!source_dir_set) {
1668 /*
1669 * open without O_EXCL so that the problem should not
1670 * occur by the following processing.
1671 * (btrfs_register_one_device() fails if O_EXCL is on)
1672 */
1673 fd = open(file, O_RDWR);
1674 if (fd < 0) {
1675 error("unable to open %s: %s", file, strerror(errno));
1676 exit(1);
1677 }
1678 ret = btrfs_prepare_device(fd, file, &dev_block_count,
1679 block_count,
1680 (zero_end ? PREP_DEVICE_ZERO_END : 0) |
1681 (discard ? PREP_DEVICE_DISCARD : 0) |
1682 (verbose ? PREP_DEVICE_VERBOSE : 0));
1683 if (ret) {
1684 close(fd);
1685 exit(1);
1686 }
1687 if (block_count && block_count > dev_block_count) {
1688 error("%s is smaller than requested size, expected %llu, found %llu",
1689 file,
1690 (unsigned long long)block_count,
1691 (unsigned long long)dev_block_count);
1692 exit(1);
1693 }
1694 } else {
1695 fd = open(file, O_CREAT | O_RDWR,
1696 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
1697 if (fd < 0) {
1698 error("unable to open %s: %s", file, strerror(errno));
1699 exit(1);
1700 }
1701
1702 source_dir_size = size_sourcedir(source_dir, sectorsize,
1703 &num_of_meta_chunks, &size_of_data);
1704 if(block_count < source_dir_size)
1705 block_count = source_dir_size;
1706 ret = zero_output_file(fd, block_count);
1707 if (ret) {
1708 error("unable to zero the output file");
1709 exit(1);
1710 }
1711 /* our "device" is the new image file */
1712 dev_block_count = block_count;
1713 }
1714
1715 /* To create the first block group and chunk 0 in make_btrfs */
1716 if (dev_block_count < BTRFS_MKFS_SYSTEM_GROUP_SIZE) {
1717 error("device is too small to make filesystem, must be at least %llu",
1718 (unsigned long long)BTRFS_MKFS_SYSTEM_GROUP_SIZE);
1719 exit(1);
1720 }
1721
1722 blocks[0] = BTRFS_SUPER_INFO_OFFSET;
1723 for (i = 1; i < 7; i++) {
1724 blocks[i] = BTRFS_SUPER_INFO_OFFSET + 1024 * 1024 +
1725 nodesize * i;
1726 }
1727
1728 if (group_profile_max_safe_loss(metadata_profile) <
1729 group_profile_max_safe_loss(data_profile)){
1730 warning("metadata has lower redundancy than data!\n");
1731 }
1732
1733 mkfs_cfg.label = label;
1734 memcpy(mkfs_cfg.fs_uuid, fs_uuid, sizeof(mkfs_cfg.fs_uuid));
1735 memcpy(mkfs_cfg.blocks, blocks, sizeof(blocks));
1736 mkfs_cfg.num_bytes = dev_block_count;
1737 mkfs_cfg.nodesize = nodesize;
1738 mkfs_cfg.sectorsize = sectorsize;
1739 mkfs_cfg.stripesize = stripesize;
1740 mkfs_cfg.features = features;
1741
1742 ret = make_btrfs(fd, &mkfs_cfg, NULL);
1743 if (ret) {
1744 error("error during mkfs: %s", strerror(-ret));
1745 exit(1);
1746 }
1747
1748 fs_info = open_ctree_fs_info(file, 0, 0, 0,
1749 OPEN_CTREE_WRITES | OPEN_CTREE_FS_PARTIAL);
1750 if (!fs_info) {
1751 error("open ctree failed");
1752 close(fd);
1753 exit(1);
1754 }
1755 root = fs_info->fs_root;
1756 fs_info->alloc_start = alloc_start;
1757
1758 ret = create_metadata_block_groups(root, mixed, &allocation);
1759 if (ret) {
1760 error("failed to create default block groups: %d", ret);
1761 exit(1);
1762 }
1763
1764 trans = btrfs_start_transaction(root, 1);
1765 if (!trans) {
1766 error("failed to start transaction");
1767 exit(1);
1768 }
1769
1770 ret = create_data_block_groups(trans, root, mixed, &allocation);
1771 if (ret) {
1772 error("failed to create default data block groups: %d", ret);
1773 exit(1);
1774 }
1775
1776 ret = make_root_dir(trans, root, &allocation);
1777 if (ret) {
1778 error("failed to setup the root directory: %d", ret);
1779 exit(1);
1780 }
1781
1782 ret = btrfs_commit_transaction(trans, root);
1783 if (ret) {
1784 error("unable to commit transaction: %d", ret);
1785 goto out;
1786 }
1787
1788 trans = btrfs_start_transaction(root, 1);
1789 if (!trans) {
1790 error("failed to start transaction");
1791 exit(1);
1792 }
1793
1794 if (dev_cnt == 0)
1795 goto raid_groups;
1796
1797 while (dev_cnt-- > 0) {
1798 file = argv[optind++];
1799
1800 /*
1801 * open without O_EXCL so that the problem should not
1802 * occur by the following processing.
1803 * (btrfs_register_one_device() fails if O_EXCL is on)
1804 */
1805 fd = open(file, O_RDWR);
1806 if (fd < 0) {
1807 error("unable to open %s: %s", file, strerror(errno));
1808 exit(1);
1809 }
1810 ret = btrfs_device_already_in_root(root, fd,
1811 BTRFS_SUPER_INFO_OFFSET);
1812 if (ret) {
1813 error("skipping duplicate device %s in the filesystem",
1814 file);
1815 close(fd);
1816 continue;
1817 }
1818 ret = btrfs_prepare_device(fd, file, &dev_block_count,
1819 block_count,
1820 (verbose ? PREP_DEVICE_VERBOSE : 0) |
1821 (zero_end ? PREP_DEVICE_ZERO_END : 0) |
1822 (discard ? PREP_DEVICE_DISCARD : 0));
1823 if (ret) {
1824 close(fd);
1825 exit(1);
1826 }
1827
1828 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
1829 sectorsize, sectorsize, sectorsize);
1830 if (ret) {
1831 error("unable to add %s to filesystem: %d", file, ret);
1832 goto out;
1833 }
1834 if (verbose >= 2) {
1835 struct btrfs_device *device;
1836
1837 device = container_of(fs_info->fs_devices->devices.next,
1838 struct btrfs_device, dev_list);
1839 printf("adding device %s id %llu\n", file,
1840 (unsigned long long)device->devid);
1841 }
1842 }
1843
1844 raid_groups:
1845 if (!source_dir_set) {
1846 ret = create_raid_groups(trans, root, data_profile,
1847 metadata_profile, mixed, &allocation);
1848 if (ret) {
1849 error("unable to create raid groups: %d", ret);
1850 goto out;
1851 }
1852 }
1853
1854 ret = create_data_reloc_tree(trans, root);
1855 if (ret) {
1856 error("unable to create data reloc tree: %d", ret);
1857 goto out;
1858 }
1859
1860 ret = btrfs_commit_transaction(trans, root);
1861 if (ret) {
1862 error("unable to commit transaction: %d", ret);
1863 goto out;
1864 }
1865
1866 if (source_dir_set) {
1867 trans = btrfs_start_transaction(root, 1);
1868 ret = create_chunks(trans, root,
1869 num_of_meta_chunks, size_of_data,
1870 &allocation);
1871 if (ret) {
1872 error("unable to create chunks: %d", ret);
1873 goto out;
1874 }
1875 ret = btrfs_commit_transaction(trans, root);
1876 if (ret) {
1877 error("transaction commit failed: %d", ret);
1878 goto out;
1879 }
1880
1881 ret = make_image(source_dir, root, fd);
1882 if (ret) {
1883 error("error wihle filling filesystem: %d", ret);
1884 goto out;
1885 }
1886 }
1887 ret = cleanup_temp_chunks(fs_info, &allocation, data_profile,
1888 metadata_profile, metadata_profile);
1889 if (ret < 0) {
1890 error("failed to cleanup temporary chunks: %d", ret);
1891 goto out;
1892 }
1893
1894 if (verbose) {
1895 char features_buf[64];
1896
1897 printf("Label: %s\n", label);
1898 printf("UUID: %s\n", mkfs_cfg.fs_uuid);
1899 printf("Node size: %u\n", nodesize);
1900 printf("Sector size: %u\n", sectorsize);
1901 printf("Filesystem size: %s\n",
1902 pretty_size(btrfs_super_total_bytes(fs_info->super_copy)));
1903 printf("Block group profiles:\n");
1904 if (allocation.data)
1905 printf(" Data: %-8s %16s\n",
1906 btrfs_group_profile_str(data_profile),
1907 pretty_size(allocation.data));
1908 if (allocation.metadata)
1909 printf(" Metadata: %-8s %16s\n",
1910 btrfs_group_profile_str(metadata_profile),
1911 pretty_size(allocation.metadata));
1912 if (allocation.mixed)
1913 printf(" Data+Metadata: %-8s %16s\n",
1914 btrfs_group_profile_str(data_profile),
1915 pretty_size(allocation.mixed));
1916 printf(" System: %-8s %16s\n",
1917 btrfs_group_profile_str(metadata_profile),
1918 pretty_size(allocation.system));
1919 printf("SSD detected: %s\n", ssd ? "yes" : "no");
1920 btrfs_parse_features_to_string(features_buf, features);
1921 printf("Incompat features: %s", features_buf);
1922 printf("\n");
1923
1924 list_all_devices(root);
1925 }
1926
1927 /*
1928 * The filesystem is now fully set up, commit the remaining changes and
1929 * fix the signature as the last step before closing the devices.
1930 */
1931 fs_info->finalize_on_close = 1;
1932 out:
1933 ret = close_ctree(root);
1934
1935 if (!ret) {
1936 optind = saved_optind;
1937 dev_cnt = argc - optind;
1938 while (dev_cnt-- > 0) {
1939 file = argv[optind++];
1940 if (is_block_device(file) == 1)
1941 btrfs_register_one_device(file);
1942 }
1943 }
1944
1945 btrfs_close_all_devices();
1946 free(label);
1947
1948 return !!ret;
1949 }
(deprecated) Btrfs progs developments and patch integration