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Ignore the error ENXIO and ENOMEDIUM during a devs scan
[btrfs-progs-unstable/devel.git] / mkfs.c
blobfbf83196fff4dcf2ef007907e1dd186f8132ab95
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 #define _XOPEN_SOURCE 500
20 #define _GNU_SOURCE
21
22 #include "kerncompat.h"
23
24 #ifndef __CHECKER__
25 #include <sys/ioctl.h>
26 #include <sys/mount.h>
27 #include "ioctl.h"
28 #endif
29
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <sys/types.h>
33 #include <sys/stat.h>
34 #include <sys/dir.h>
35 #include <fcntl.h>
36 #include <unistd.h>
37 #include <getopt.h>
38 #include <uuid/uuid.h>
39 #include <linux/fs.h>
40 #include <ctype.h>
41 #include <attr/xattr.h>
42 #include "ctree.h"
43 #include "disk-io.h"
44 #include "volumes.h"
45 #include "transaction.h"
46 #include "utils.h"
47 #include "version.h"
48
49 static u64 index_cnt = 2;
50
51 struct directory_name_entry {
52 char *dir_name;
53 char *path;
54 ino_t inum;
55 struct list_head list;
56 };
57
58 static int make_root_dir(struct btrfs_root *root, int mixed)
59 {
60 struct btrfs_trans_handle *trans;
61 struct btrfs_key location;
62 u64 bytes_used;
63 u64 chunk_start = 0;
64 u64 chunk_size = 0;
65 int ret;
66
67 trans = btrfs_start_transaction(root, 1);
68 bytes_used = btrfs_super_bytes_used(&root->fs_info->super_copy);
69
70 root->fs_info->system_allocs = 1;
71 ret = btrfs_make_block_group(trans, root, bytes_used,
72 BTRFS_BLOCK_GROUP_SYSTEM,
73 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
74 0, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
75 BUG_ON(ret);
76
77 if (mixed) {
78 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
79 &chunk_start, &chunk_size,
80 BTRFS_BLOCK_GROUP_METADATA |
81 BTRFS_BLOCK_GROUP_DATA);
82 BUG_ON(ret);
83 ret = btrfs_make_block_group(trans, root, 0,
84 BTRFS_BLOCK_GROUP_METADATA |
85 BTRFS_BLOCK_GROUP_DATA,
86 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
87 chunk_start, chunk_size);
88 BUG_ON(ret);
89 printf("Created a data/metadata chunk of size %llu\n", chunk_size);
90 } else {
91 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
92 &chunk_start, &chunk_size,
93 BTRFS_BLOCK_GROUP_METADATA);
94 BUG_ON(ret);
95 ret = btrfs_make_block_group(trans, root, 0,
96 BTRFS_BLOCK_GROUP_METADATA,
97 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
98 chunk_start, chunk_size);
99 BUG_ON(ret);
100 }
101
102 root->fs_info->system_allocs = 0;
103 btrfs_commit_transaction(trans, root);
104 trans = btrfs_start_transaction(root, 1);
105 BUG_ON(!trans);
106
107 if (!mixed) {
108 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
109 &chunk_start, &chunk_size,
110 BTRFS_BLOCK_GROUP_DATA);
111 BUG_ON(ret);
112 ret = btrfs_make_block_group(trans, root, 0,
113 BTRFS_BLOCK_GROUP_DATA,
114 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
115 chunk_start, chunk_size);
116 BUG_ON(ret);
117 }
118
119 ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
120 BTRFS_ROOT_TREE_DIR_OBJECTID);
121 if (ret)
122 goto err;
123 ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
124 if (ret)
125 goto err;
126 memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
127 location.offset = (u64)-1;
128 ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
129 "default", 7,
130 btrfs_super_root_dir(&root->fs_info->super_copy),
131 &location, BTRFS_FT_DIR, 0);
132 if (ret)
133 goto err;
134
135 ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
136 "default", 7, location.objectid,
137 BTRFS_ROOT_TREE_DIR_OBJECTID, 0);
138 if (ret)
139 goto err;
140
141 btrfs_commit_transaction(trans, root);
142 err:
143 return ret;
144 }
145
146 static int recow_roots(struct btrfs_trans_handle *trans,
147 struct btrfs_root *root)
148 {
149 int ret;
150 struct extent_buffer *tmp;
151 struct btrfs_fs_info *info = root->fs_info;
152
153 ret = __btrfs_cow_block(trans, info->fs_root, info->fs_root->node,
154 NULL, 0, &tmp, 0, 0);
155 BUG_ON(ret);
156 free_extent_buffer(tmp);
157
158 ret = __btrfs_cow_block(trans, info->tree_root, info->tree_root->node,
159 NULL, 0, &tmp, 0, 0);
160 BUG_ON(ret);
161 free_extent_buffer(tmp);
162
163 ret = __btrfs_cow_block(trans, info->extent_root,
164 info->extent_root->node, NULL, 0, &tmp, 0, 0);
165 BUG_ON(ret);
166 free_extent_buffer(tmp);
167
168 ret = __btrfs_cow_block(trans, info->chunk_root, info->chunk_root->node,
169 NULL, 0, &tmp, 0, 0);
170 BUG_ON(ret);
171 free_extent_buffer(tmp);
172
173
174 ret = __btrfs_cow_block(trans, info->dev_root, info->dev_root->node,
175 NULL, 0, &tmp, 0, 0);
176 BUG_ON(ret);
177 free_extent_buffer(tmp);
178
179 ret = __btrfs_cow_block(trans, info->csum_root, info->csum_root->node,
180 NULL, 0, &tmp, 0, 0);
181 BUG_ON(ret);
182 free_extent_buffer(tmp);
183
184 return 0;
185 }
186
187 static int create_one_raid_group(struct btrfs_trans_handle *trans,
188 struct btrfs_root *root, u64 type)
189 {
190 u64 chunk_start;
191 u64 chunk_size;
192 int ret;
193
194 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
195 &chunk_start, &chunk_size, type);
196 BUG_ON(ret);
197 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
198 type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
199 chunk_start, chunk_size);
200 BUG_ON(ret);
201 return ret;
202 }
203
204 static int create_raid_groups(struct btrfs_trans_handle *trans,
205 struct btrfs_root *root, u64 data_profile,
206 int data_profile_opt, u64 metadata_profile,
207 int metadata_profile_opt, int mixed)
208 {
209 u64 num_devices = btrfs_super_num_devices(&root->fs_info->super_copy);
210 u64 allowed;
211 int ret;
212
213 /*
214 * Set default profiles according to number of added devices.
215 * For mixed groups defaults are single/single.
216 */
217 if (!metadata_profile_opt && !mixed) {
218 metadata_profile = (num_devices > 1) ?
219 BTRFS_BLOCK_GROUP_RAID1 : BTRFS_BLOCK_GROUP_DUP;
220 }
221 if (!data_profile_opt && !mixed) {
222 data_profile = (num_devices > 1) ?
223 BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */
224 }
225
226 if (num_devices == 1)
227 allowed = BTRFS_BLOCK_GROUP_DUP;
228 else if (num_devices >= 4) {
229 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
230 BTRFS_BLOCK_GROUP_RAID10;
231 } else
232 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1;
233
234 if (metadata_profile & ~allowed) {
235 fprintf(stderr, "unable to create FS with metadata "
236 "profile %llu (have %llu devices)\n", metadata_profile,
237 num_devices);
238 exit(1);
239 }
240 if (data_profile & ~allowed) {
241 fprintf(stderr, "unable to create FS with data "
242 "profile %llu (have %llu devices)\n", data_profile,
243 num_devices);
244 exit(1);
245 }
246
247 /* allow dup'ed data chunks only in mixed mode */
248 if (!mixed && (data_profile & BTRFS_BLOCK_GROUP_DUP)) {
249 fprintf(stderr, "dup for data is allowed only in mixed mode\n");
250 exit(1);
251 }
252
253 if (allowed & metadata_profile) {
254 u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA;
255
256 ret = create_one_raid_group(trans, root,
257 BTRFS_BLOCK_GROUP_SYSTEM |
258 (allowed & metadata_profile));
259 BUG_ON(ret);
260
261 if (mixed)
262 meta_flags |= BTRFS_BLOCK_GROUP_DATA;
263
264 ret = create_one_raid_group(trans, root, meta_flags |
265 (allowed & metadata_profile));
266 BUG_ON(ret);
267
268 ret = recow_roots(trans, root);
269 BUG_ON(ret);
270 }
271 if (!mixed && num_devices > 1 && (allowed & data_profile)) {
272 ret = create_one_raid_group(trans, root,
273 BTRFS_BLOCK_GROUP_DATA |
274 (allowed & data_profile));
275 BUG_ON(ret);
276 }
277 return 0;
278 }
279
280 static int create_data_reloc_tree(struct btrfs_trans_handle *trans,
281 struct btrfs_root *root)
282 {
283 struct btrfs_key location;
284 struct btrfs_root_item root_item;
285 struct extent_buffer *tmp;
286 u64 objectid = BTRFS_DATA_RELOC_TREE_OBJECTID;
287 int ret;
288
289 ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
290 BUG_ON(ret);
291
292 memcpy(&root_item, &root->root_item, sizeof(root_item));
293 btrfs_set_root_bytenr(&root_item, tmp->start);
294 btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
295 btrfs_set_root_generation(&root_item, trans->transid);
296 free_extent_buffer(tmp);
297
298 location.objectid = objectid;
299 location.type = BTRFS_ROOT_ITEM_KEY;
300 location.offset = 0;
301 ret = btrfs_insert_root(trans, root->fs_info->tree_root,
302 &location, &root_item);
303 BUG_ON(ret);
304 return 0;
305 }
306
307 static void print_usage(void)
308 {
309 fprintf(stderr, "usage: mkfs.btrfs [options] dev [ dev ... ]\n");
310 fprintf(stderr, "options:\n");
311 fprintf(stderr, "\t -A --alloc-start the offset to start the FS\n");
312 fprintf(stderr, "\t -b --byte-count total number of bytes in the FS\n");
313 fprintf(stderr, "\t -d --data data profile, raid0, raid1, raid10, dup or single\n");
314 fprintf(stderr, "\t -l --leafsize size of btree leaves\n");
315 fprintf(stderr, "\t -L --label set a label\n");
316 fprintf(stderr, "\t -m --metadata metadata profile, values like data profile\n");
317 fprintf(stderr, "\t -M --mixed mix metadata and data together\n");
318 fprintf(stderr, "\t -n --nodesize size of btree nodes\n");
319 fprintf(stderr, "\t -s --sectorsize min block allocation\n");
320 fprintf(stderr, "\t -r --rootdir the source directory\n");
321 fprintf(stderr, "\t -K --nodiscard do not perform whole device TRIM\n");
322 fprintf(stderr, "\t -V --version print the mkfs.btrfs version and exit\n");
323 fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
324 exit(1);
325 }
326
327 static void print_version(void)
328 {
329 fprintf(stderr, "mkfs.btrfs, part of %s\n", BTRFS_BUILD_VERSION);
330 exit(0);
331 }
332
333 static u64 parse_profile(char *s)
334 {
335 if (strcmp(s, "raid0") == 0) {
336 return BTRFS_BLOCK_GROUP_RAID0;
337 } else if (strcmp(s, "raid1") == 0) {
338 return BTRFS_BLOCK_GROUP_RAID1;
339 } else if (strcmp(s, "raid10") == 0) {
340 return BTRFS_BLOCK_GROUP_RAID10;
341 } else if (strcmp(s, "dup") == 0) {
342 return BTRFS_BLOCK_GROUP_DUP;
343 } else if (strcmp(s, "single") == 0) {
344 return 0;
345 } else {
346 fprintf(stderr, "Unknown profile %s\n", s);
347 print_usage();
348 }
349 /* not reached */
350 return 0;
351 }
352
353 static char *parse_label(char *input)
354 {
355 int i;
356 int len = strlen(input);
357
358 if (len >= BTRFS_LABEL_SIZE) {
359 fprintf(stderr, "Label %s is too long (max %d)\n", input,
360 BTRFS_LABEL_SIZE - 1);
361 exit(1);
362 }
363 for (i = 0; i < len; i++) {
364 if (input[i] == '/' || input[i] == '\\') {
365 fprintf(stderr, "invalid label %s\n", input);
366 exit(1);
367 }
368 }
369 return strdup(input);
370 }
371
372 static struct option long_options[] = {
373 { "alloc-start", 1, NULL, 'A'},
374 { "byte-count", 1, NULL, 'b' },
375 { "leafsize", 1, NULL, 'l' },
376 { "label", 1, NULL, 'L'},
377 { "metadata", 1, NULL, 'm' },
378 { "mixed", 0, NULL, 'M' },
379 { "nodesize", 1, NULL, 'n' },
380 { "sectorsize", 1, NULL, 's' },
381 { "data", 1, NULL, 'd' },
382 { "version", 0, NULL, 'V' },
383 { "rootdir", 1, NULL, 'r' },
384 { "nodiscard", 0, NULL, 'K' },
385 { 0, 0, 0, 0}
386 };
387
388 static int add_directory_items(struct btrfs_trans_handle *trans,
389 struct btrfs_root *root, u64 objectid,
390 ino_t parent_inum, const char *name,
391 struct stat *st, int *dir_index_cnt)
392 {
393 int ret;
394 int name_len;
395 struct btrfs_key location;
396 u8 filetype = 0;
397
398 name_len = strlen(name);
399
400 location.objectid = objectid;
401 location.offset = 0;
402 btrfs_set_key_type(&location, BTRFS_INODE_ITEM_KEY);
403
404 if (S_ISDIR(st->st_mode))
405 filetype = BTRFS_FT_DIR;
406 if (S_ISREG(st->st_mode))
407 filetype = BTRFS_FT_REG_FILE;
408 if (S_ISLNK(st->st_mode))
409 filetype = BTRFS_FT_SYMLINK;
410
411 ret = btrfs_insert_dir_item(trans, root, name, name_len,
412 parent_inum, &location,
413 filetype, index_cnt);
414
415 *dir_index_cnt = index_cnt;
416 index_cnt++;
417
418 return ret;
419 }
420
421 static int fill_inode_item(struct btrfs_trans_handle *trans,
422 struct btrfs_root *root,
423 struct btrfs_inode_item *dst, struct stat *src)
424 {
425 u64 blocks = 0;
426 u64 sectorsize = root->sectorsize;
427
428 /*
429 * btrfs_inode_item has some reserved fields
430 * and represents on-disk inode entry, so
431 * zero everything to prevent information leak
432 */
433 memset(dst, 0, sizeof (*dst));
434
435 btrfs_set_stack_inode_generation(dst, trans->transid);
436 btrfs_set_stack_inode_size(dst, src->st_size);
437 btrfs_set_stack_inode_nbytes(dst, 0);
438 btrfs_set_stack_inode_block_group(dst, 0);
439 btrfs_set_stack_inode_nlink(dst, src->st_nlink);
440 btrfs_set_stack_inode_uid(dst, src->st_uid);
441 btrfs_set_stack_inode_gid(dst, src->st_gid);
442 btrfs_set_stack_inode_mode(dst, src->st_mode);
443 btrfs_set_stack_inode_rdev(dst, 0);
444 btrfs_set_stack_inode_flags(dst, 0);
445 btrfs_set_stack_timespec_sec(&dst->atime, src->st_atime);
446 btrfs_set_stack_timespec_nsec(&dst->atime, 0);
447 btrfs_set_stack_timespec_sec(&dst->ctime, src->st_ctime);
448 btrfs_set_stack_timespec_nsec(&dst->ctime, 0);
449 btrfs_set_stack_timespec_sec(&dst->mtime, src->st_mtime);
450 btrfs_set_stack_timespec_nsec(&dst->mtime, 0);
451 btrfs_set_stack_timespec_sec(&dst->otime, 0);
452 btrfs_set_stack_timespec_nsec(&dst->otime, 0);
453
454 if (S_ISDIR(src->st_mode)) {
455 btrfs_set_stack_inode_size(dst, 0);
456 btrfs_set_stack_inode_nlink(dst, 1);
457 }
458 if (S_ISREG(src->st_mode)) {
459 btrfs_set_stack_inode_size(dst, (u64)src->st_size);
460 if (src->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root))
461 btrfs_set_stack_inode_nbytes(dst, src->st_size);
462 else {
463 blocks = src->st_size / sectorsize;
464 if (src->st_size % sectorsize)
465 blocks += 1;
466 blocks *= sectorsize;
467 btrfs_set_stack_inode_nbytes(dst, blocks);
468 }
469 }
470 if (S_ISLNK(src->st_mode))
471 btrfs_set_stack_inode_nbytes(dst, src->st_size + 1);
472
473 return 0;
474 }
475
476 static int directory_select(const struct direct *entry)
477 {
478 if ((strncmp(entry->d_name, ".", entry->d_reclen) == 0) ||
479 (strncmp(entry->d_name, "..", entry->d_reclen) == 0))
480 return 0;
481 else
482 return 1;
483 }
484
485 static void free_namelist(struct direct **files, int count)
486 {
487 int i;
488
489 if (count < 0)
490 return;
491
492 for (i = 0; i < count; ++i)
493 free(files[i]);
494 free(files);
495 }
496
497 static u64 calculate_dir_inode_size(char *dirname)
498 {
499 int count, i;
500 struct direct **files, *cur_file;
501 u64 dir_inode_size = 0;
502
503 count = scandir(dirname, &files, directory_select, NULL);
504
505 for (i = 0; i < count; i++) {
506 cur_file = files[i];
507 dir_inode_size += strlen(cur_file->d_name);
508 }
509
510 free_namelist(files, count);
511
512 dir_inode_size *= 2;
513 return dir_inode_size;
514 }
515
516 static int add_inode_items(struct btrfs_trans_handle *trans,
517 struct btrfs_root *root,
518 struct stat *st, char *name,
519 u64 self_objectid, ino_t parent_inum,
520 int dir_index_cnt, struct btrfs_inode_item *inode_ret)
521 {
522 int ret;
523 struct btrfs_key inode_key;
524 struct btrfs_inode_item btrfs_inode;
525 u64 objectid;
526 u64 inode_size = 0;
527 int name_len;
528
529 name_len = strlen(name);
530 fill_inode_item(trans, root, &btrfs_inode, st);
531 objectid = self_objectid;
532
533 if (S_ISDIR(st->st_mode)) {
534 inode_size = calculate_dir_inode_size(name);
535 btrfs_set_stack_inode_size(&btrfs_inode, inode_size);
536 }
537
538 inode_key.objectid = objectid;
539 inode_key.offset = 0;
540 btrfs_set_key_type(&inode_key, BTRFS_INODE_ITEM_KEY);
541
542 ret = btrfs_insert_inode(trans, root, objectid, &btrfs_inode);
543 if (ret)
544 goto fail;
545
546 ret = btrfs_insert_inode_ref(trans, root, name, name_len,
547 objectid, parent_inum, dir_index_cnt);
548 if (ret)
549 goto fail;
550
551 *inode_ret = btrfs_inode;
552 fail:
553 return ret;
554 }
555
556 static int add_xattr_item(struct btrfs_trans_handle *trans,
557 struct btrfs_root *root, u64 objectid,
558 const char *file_name)
559 {
560 int ret;
561 int cur_name_len;
562 char xattr_list[XATTR_LIST_MAX];
563 char *cur_name;
564 char cur_value[XATTR_SIZE_MAX];
565 char delimiter = '\0';
566 char *next_location = xattr_list;
567
568 ret = llistxattr(file_name, xattr_list, XATTR_LIST_MAX);
569 if (ret < 0) {
570 if(errno == ENOTSUP)
571 return 0;
572 fprintf(stderr, "get a list of xattr failed for %s\n",
573 file_name);
574 return ret;
575 }
576 if (ret == 0)
577 return ret;
578
579 cur_name = strtok(xattr_list, &delimiter);
580 while (cur_name != NULL) {
581 cur_name_len = strlen(cur_name);
582 next_location += cur_name_len + 1;
583
584 ret = getxattr(file_name, cur_name, cur_value, XATTR_SIZE_MAX);
585 if (ret < 0) {
586 if(errno == ENOTSUP)
587 return 0;
588 fprintf(stderr, "get a xattr value failed for %s attr %s\n",
589 file_name, cur_name);
590 return ret;
591 }
592
593 ret = btrfs_insert_xattr_item(trans, root, cur_name,
594 cur_name_len, cur_value,
595 ret, objectid);
596 if (ret) {
597 fprintf(stderr, "insert a xattr item failed for %s\n",
598 file_name);
599 }
600
601 cur_name = strtok(next_location, &delimiter);
602 }
603
604 return ret;
605 }
606 static int custom_alloc_extent(struct btrfs_root *root, u64 num_bytes,
607 u64 hint_byte, struct btrfs_key *ins)
608 {
609 u64 start;
610 u64 end;
611 u64 last = hint_byte;
612 int ret;
613 int wrapped = 0;
614 struct btrfs_block_group_cache *cache;
615
616 while (1) {
617 ret = find_first_extent_bit(&root->fs_info->free_space_cache,
618 last, &start, &end, EXTENT_DIRTY);
619 if (ret) {
620 if (wrapped++ == 0) {
621 last = 0;
622 continue;
623 } else {
624 goto fail;
625 }
626 }
627
628 start = max(last, start);
629 last = end + 1;
630 if (last - start < num_bytes)
631 continue;
632
633 last = start + num_bytes;
634 if (test_range_bit(&root->fs_info->pinned_extents,
635 start, last - 1, EXTENT_DIRTY, 0))
636 continue;
637
638 cache = btrfs_lookup_block_group(root->fs_info, start);
639 BUG_ON(!cache);
640 if (cache->flags & BTRFS_BLOCK_GROUP_SYSTEM ||
641 last > cache->key.objectid + cache->key.offset) {
642 last = cache->key.objectid + cache->key.offset;
643 continue;
644 }
645
646 if (cache->flags & (BTRFS_BLOCK_GROUP_SYSTEM |
647 BTRFS_BLOCK_GROUP_METADATA)) {
648 last = cache->key.objectid + cache->key.offset;
649 continue;
650 }
651
652 clear_extent_dirty(&root->fs_info->free_space_cache,
653 start, start + num_bytes - 1, 0);
654
655 ins->objectid = start;
656 ins->offset = num_bytes;
657 ins->type = BTRFS_EXTENT_ITEM_KEY;
658 return 0;
659 }
660 fail:
661 fprintf(stderr, "not enough free space\n");
662 return -ENOSPC;
663 }
664
665 static int record_file_extent(struct btrfs_trans_handle *trans,
666 struct btrfs_root *root, u64 objectid,
667 struct btrfs_inode_item *inode,
668 u64 file_pos, u64 disk_bytenr,
669 u64 num_bytes)
670 {
671 int ret;
672 struct btrfs_fs_info *info = root->fs_info;
673 struct btrfs_root *extent_root = info->extent_root;
674 struct extent_buffer *leaf;
675 struct btrfs_file_extent_item *fi;
676 struct btrfs_key ins_key;
677 struct btrfs_path path;
678 struct btrfs_extent_item *ei;
679
680 btrfs_init_path(&path);
681
682 ins_key.objectid = objectid;
683 ins_key.offset = 0;
684 btrfs_set_key_type(&ins_key, BTRFS_EXTENT_DATA_KEY);
685 ret = btrfs_insert_empty_item(trans, root, &path, &ins_key,
686 sizeof(*fi));
687 if (ret)
688 goto fail;
689 leaf = path.nodes[0];
690 fi = btrfs_item_ptr(leaf, path.slots[0],
691 struct btrfs_file_extent_item);
692 btrfs_set_file_extent_generation(leaf, fi, trans->transid);
693 btrfs_set_file_extent_type(leaf, fi, BTRFS_FILE_EXTENT_REG);
694 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
695 btrfs_set_file_extent_disk_num_bytes(leaf, fi, num_bytes);
696 btrfs_set_file_extent_offset(leaf, fi, 0);
697 btrfs_set_file_extent_num_bytes(leaf, fi, num_bytes);
698 btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes);
699 btrfs_set_file_extent_compression(leaf, fi, 0);
700 btrfs_set_file_extent_encryption(leaf, fi, 0);
701 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
702 btrfs_mark_buffer_dirty(leaf);
703
704 btrfs_release_path(root, &path);
705
706 ins_key.objectid = disk_bytenr;
707 ins_key.offset = num_bytes;
708 ins_key.type = BTRFS_EXTENT_ITEM_KEY;
709
710 ret = btrfs_insert_empty_item(trans, extent_root, &path,
711 &ins_key, sizeof(*ei));
712 if (ret == 0) {
713 leaf = path.nodes[0];
714 ei = btrfs_item_ptr(leaf, path.slots[0],
715 struct btrfs_extent_item);
716
717 btrfs_set_extent_refs(leaf, ei, 0);
718 btrfs_set_extent_generation(leaf, ei, trans->transid);
719 btrfs_set_extent_flags(leaf, ei, BTRFS_EXTENT_FLAG_DATA);
720
721 btrfs_mark_buffer_dirty(leaf);
722 ret = btrfs_update_block_group(trans, root, disk_bytenr,
723 num_bytes, 1, 0);
724 if (ret)
725 goto fail;
726 } else if (ret != -EEXIST) {
727 goto fail;
728 }
729
730 ret = btrfs_inc_extent_ref(trans, root, disk_bytenr, num_bytes, 0,
731 root->root_key.objectid,
732 objectid, 0);
733 fail:
734 btrfs_release_path(root, &path);
735 return ret;
736 }
737
738 static int add_symbolic_link(struct btrfs_trans_handle *trans,
739 struct btrfs_root *root,
740 u64 objectid, const char *path_name)
741 {
742 int ret;
743 u64 sectorsize = root->sectorsize;
744 char *buf = malloc(sectorsize);
745
746 ret = readlink(path_name, buf, sectorsize);
747 if (ret <= 0) {
748 fprintf(stderr, "readlink failed for %s\n", path_name);
749 goto fail;
750 }
751 if (ret >= sectorsize) {
752 fprintf(stderr, "symlink too long for %s", path_name);
753 ret = -1;
754 goto fail;
755 }
756
757 buf[ret] = '\0'; /* readlink does not do it for us */
758 ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
759 buf, ret + 1);
760 fail:
761 free(buf);
762 return ret;
763 }
764
765 static int add_file_items(struct btrfs_trans_handle *trans,
766 struct btrfs_root *root,
767 struct btrfs_inode_item *btrfs_inode, u64 objectid,
768 ino_t parent_inum, struct stat *st,
769 const char *path_name, int out_fd)
770 {
771 int ret = -1;
772 ssize_t ret_read;
773 u64 bytes_read = 0;
774 char *buffer = NULL;
775 struct btrfs_key key;
776 int blocks;
777 u32 sectorsize = root->sectorsize;
778 u64 first_block = 0;
779 u64 num_blocks = 0;
780 int fd;
781
782 fd = open(path_name, O_RDONLY);
783 if (fd == -1) {
784 fprintf(stderr, "%s open failed\n", path_name);
785 goto end;
786 }
787
788 blocks = st->st_size / sectorsize;
789 if (st->st_size % sectorsize)
790 blocks += 1;
791
792 if (st->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root)) {
793 buffer = malloc(st->st_size);
794 ret_read = pread64(fd, buffer, st->st_size, bytes_read);
795 if (ret_read == -1) {
796 fprintf(stderr, "%s read failed\n", path_name);
797 goto end;
798 }
799
800 ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
801 buffer, st->st_size);
802 goto end;
803 }
804
805 ret = custom_alloc_extent(root, blocks * sectorsize, 0, &key);
806 if (ret)
807 goto end;
808
809 first_block = key.objectid;
810 bytes_read = 0;
811 buffer = malloc(sectorsize);
812
813 do {
814 memset(buffer, 0, sectorsize);
815 ret_read = pread64(fd, buffer, sectorsize, bytes_read);
816 if (ret_read == -1) {
817 fprintf(stderr, "%s read failed\n", path_name);
818 goto end;
819 }
820
821 ret = pwrite64(out_fd, buffer, sectorsize,
822 first_block + bytes_read);
823 if (ret != sectorsize) {
824 fprintf(stderr, "output file write failed\n");
825 goto end;
826 }
827
828 /* checksum for file data */
829 ret = btrfs_csum_file_block(trans, root->fs_info->csum_root,
830 first_block + (blocks * sectorsize),
831 first_block + bytes_read,
832 buffer, sectorsize);
833 if (ret) {
834 fprintf(stderr, "%s checksum failed\n", path_name);
835 goto end;
836 }
837
838 bytes_read += ret_read;
839 num_blocks++;
840 } while (ret_read == sectorsize);
841
842 if (num_blocks > 0) {
843 ret = record_file_extent(trans, root, objectid, btrfs_inode,
844 first_block, first_block,
845 blocks * sectorsize);
846 if (ret)
847 goto end;
848 }
849
850 end:
851 if (buffer)
852 free(buffer);
853 close(fd);
854 return ret;
855 }
856
857 static char *make_path(char *dir, char *name)
858 {
859 char *path;
860
861 path = malloc(strlen(dir) + strlen(name) + 2);
862 if (!path)
863 return NULL;
864 strcpy(path, dir);
865 if (dir[strlen(dir) - 1] != '/')
866 strcat(path, "/");
867 strcat(path, name);
868 return path;
869 }
870
871 static int traverse_directory(struct btrfs_trans_handle *trans,
872 struct btrfs_root *root, char *dir_name,
873 struct directory_name_entry *dir_head, int out_fd)
874 {
875 int ret = 0;
876
877 struct btrfs_inode_item cur_inode;
878 struct btrfs_inode_item *inode_item;
879 int count, i, dir_index_cnt;
880 struct direct **files;
881 struct stat st;
882 struct directory_name_entry *dir_entry, *parent_dir_entry;
883 struct direct *cur_file;
884 ino_t parent_inum, cur_inum;
885 ino_t highest_inum = 0;
886 char *parent_dir_name;
887 struct btrfs_path path;
888 struct extent_buffer *leaf;
889 struct btrfs_key root_dir_key;
890 u64 root_dir_inode_size = 0;
891
892 /* Add list for source directory */
893 dir_entry = malloc(sizeof(struct directory_name_entry));
894 dir_entry->dir_name = dir_name;
895 dir_entry->path = strdup(dir_name);
896
897 parent_inum = highest_inum + BTRFS_FIRST_FREE_OBJECTID;
898 dir_entry->inum = parent_inum;
899 list_add_tail(&dir_entry->list, &dir_head->list);
900
901 btrfs_init_path(&path);
902
903 root_dir_key.objectid = btrfs_root_dirid(&root->root_item);
904 root_dir_key.offset = 0;
905 btrfs_set_key_type(&root_dir_key, BTRFS_INODE_ITEM_KEY);
906 ret = btrfs_lookup_inode(trans, root, &path, &root_dir_key, 1);
907 if (ret) {
908 fprintf(stderr, "root dir lookup error\n");
909 return -1;
910 }
911
912 leaf = path.nodes[0];
913 inode_item = btrfs_item_ptr(leaf, path.slots[0],
914 struct btrfs_inode_item);
915
916 root_dir_inode_size = calculate_dir_inode_size(dir_name);
917 btrfs_set_inode_size(leaf, inode_item, root_dir_inode_size);
918 btrfs_mark_buffer_dirty(leaf);
919
920 btrfs_release_path(root, &path);
921
922 do {
923 parent_dir_entry = list_entry(dir_head->list.next,
924 struct directory_name_entry,
925 list);
926 list_del(&parent_dir_entry->list);
927
928 parent_inum = parent_dir_entry->inum;
929 parent_dir_name = parent_dir_entry->dir_name;
930 if (chdir(parent_dir_entry->path)) {
931 fprintf(stderr, "chdir error for %s\n",
932 parent_dir_name);
933 goto fail_no_files;
934 }
935
936 count = scandir(parent_dir_entry->path, &files,
937 directory_select, NULL);
938 if (count == -1)
939 {
940 fprintf(stderr, "scandir for %s failed: %s\n",
941 parent_dir_name, strerror (errno));
942 goto fail;
943 }
944
945 for (i = 0; i < count; i++) {
946 cur_file = files[i];
947
948 if (lstat(cur_file->d_name, &st) == -1) {
949 fprintf(stderr, "lstat failed for file %s\n",
950 cur_file->d_name);
951 goto fail;
952 }
953
954 cur_inum = ++highest_inum + BTRFS_FIRST_FREE_OBJECTID;
955 ret = add_directory_items(trans, root,
956 cur_inum, parent_inum,
957 cur_file->d_name,
958 &st, &dir_index_cnt);
959 if (ret) {
960 fprintf(stderr, "add_directory_items failed\n");
961 goto fail;
962 }
963
964 ret = add_inode_items(trans, root, &st,
965 cur_file->d_name, cur_inum,
966 parent_inum, dir_index_cnt,
967 &cur_inode);
968 if (ret) {
969 fprintf(stderr, "add_inode_items failed\n");
970 goto fail;
971 }
972
973 ret = add_xattr_item(trans, root,
974 cur_inum, cur_file->d_name);
975 if (ret) {
976 fprintf(stderr, "add_xattr_item failed\n");
977 if(ret != -ENOTSUP)
978 goto fail;
979 }
980
981 if (S_ISDIR(st.st_mode)) {
982 dir_entry = malloc(sizeof(struct directory_name_entry));
983 dir_entry->dir_name = cur_file->d_name;
984 dir_entry->path = make_path(parent_dir_entry->path,
985 cur_file->d_name);
986 dir_entry->inum = cur_inum;
987 list_add_tail(&dir_entry->list, &dir_head->list);
988 } else if (S_ISREG(st.st_mode)) {
989 ret = add_file_items(trans, root, &cur_inode,
990 cur_inum, parent_inum, &st,
991 cur_file->d_name, out_fd);
992 if (ret) {
993 fprintf(stderr, "add_file_items failed\n");
994 goto fail;
995 }
996 } else if (S_ISLNK(st.st_mode)) {
997 ret = add_symbolic_link(trans, root,
998 cur_inum, cur_file->d_name);
999 if (ret) {
1000 fprintf(stderr, "add_symbolic_link failed\n");
1001 goto fail;
1002 }
1003 }
1004 }
1005
1006 free_namelist(files, count);
1007 free(parent_dir_entry->path);
1008 free(parent_dir_entry);
1009
1010 index_cnt = 2;
1011
1012 } while (!list_empty(&dir_head->list));
1013
1014 return 0;
1015 fail:
1016 free_namelist(files, count);
1017 fail_no_files:
1018 free(parent_dir_entry->path);
1019 free(parent_dir_entry);
1020 return -1;
1021 }
1022
1023 static int open_target(char *output_name)
1024 {
1025 int output_fd;
1026 output_fd = open(output_name, O_CREAT | O_RDWR | O_TRUNC,
1027 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
1028
1029 return output_fd;
1030 }
1031
1032 static int create_chunks(struct btrfs_trans_handle *trans,
1033 struct btrfs_root *root, u64 num_of_meta_chunks,
1034 u64 size_of_data)
1035 {
1036 u64 chunk_start;
1037 u64 chunk_size;
1038 u64 meta_type = BTRFS_BLOCK_GROUP_METADATA;
1039 u64 data_type = BTRFS_BLOCK_GROUP_DATA;
1040 u64 minimum_data_chunk_size = 8 * 1024 * 1024;
1041 u64 i;
1042 int ret;
1043
1044 for (i = 0; i < num_of_meta_chunks; i++) {
1045 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
1046 &chunk_start, &chunk_size, meta_type);
1047 BUG_ON(ret);
1048 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1049 meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1050 chunk_start, chunk_size);
1051 BUG_ON(ret);
1052 set_extent_dirty(&root->fs_info->free_space_cache,
1053 chunk_start, chunk_start + chunk_size - 1, 0);
1054 }
1055
1056 if (size_of_data < minimum_data_chunk_size)
1057 size_of_data = minimum_data_chunk_size;
1058 ret = btrfs_alloc_data_chunk(trans, root->fs_info->extent_root,
1059 &chunk_start, size_of_data, data_type);
1060 BUG_ON(ret);
1061 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1062 data_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1063 chunk_start, size_of_data);
1064 BUG_ON(ret);
1065 set_extent_dirty(&root->fs_info->free_space_cache,
1066 chunk_start, chunk_start + size_of_data - 1, 0);
1067 return ret;
1068 }
1069
1070 static int make_image(char *source_dir, struct btrfs_root *root, int out_fd)
1071 {
1072 int ret;
1073 struct btrfs_trans_handle *trans;
1074
1075 struct stat root_st;
1076
1077 struct directory_name_entry dir_head;
1078
1079 ret = lstat(source_dir, &root_st);
1080 if (ret) {
1081 fprintf(stderr, "unable to lstat the %s\n", source_dir);
1082 goto fail;
1083 }
1084
1085 INIT_LIST_HEAD(&dir_head.list);
1086
1087 trans = btrfs_start_transaction(root, 1);
1088 ret = traverse_directory(trans, root, source_dir, &dir_head, out_fd);
1089 if (ret) {
1090 fprintf(stderr, "unable to traverse_directory\n");
1091 goto fail;
1092 }
1093 btrfs_commit_transaction(trans, root);
1094
1095 printf("Making image is completed.\n");
1096 return 0;
1097 fail:
1098 fprintf(stderr, "Making image is aborted.\n");
1099 return -1;
1100 }
1101
1102 static u64 size_sourcedir(char *dir_name, u64 sectorsize,
1103 u64 *num_of_meta_chunks_ret, u64 *size_of_data_ret)
1104 {
1105 u64 dir_size = 0;
1106 u64 total_size = 0;
1107 int ret;
1108 char command[1024];
1109 char path[512];
1110 char *file_name = "temp_file";
1111 FILE *file;
1112 u64 default_chunk_size = 8 * 1024 * 1024; /* 8MB */
1113 u64 allocated_meta_size = 8 * 1024 * 1024; /* 8MB */
1114 u64 allocated_total_size = 20 * 1024 * 1024; /* 20MB */
1115 u64 num_of_meta_chunks = 0;
1116 u64 num_of_allocated_meta_chunks =
1117 allocated_meta_size / default_chunk_size;
1118
1119 ret = sprintf(command, "du -B 4096 -s ");
1120 if (ret < 0) {
1121 fprintf(stderr, "error executing sprintf for du command\n");
1122 return -1;
1123 }
1124 strcat(command, dir_name);
1125 strcat(command, " > ");
1126 strcat(command, file_name);
1127 ret = system(command);
1128
1129 file = fopen(file_name, "r");
1130 ret = fscanf(file, "%lld %s\n", &dir_size, path);
1131 fclose(file);
1132 remove(file_name);
1133
1134 dir_size *= sectorsize;
1135 *size_of_data_ret = dir_size;
1136
1137 num_of_meta_chunks = (dir_size / 2) / default_chunk_size;
1138 if (((dir_size / 2) % default_chunk_size) != 0)
1139 num_of_meta_chunks++;
1140 if (num_of_meta_chunks <= num_of_allocated_meta_chunks)
1141 num_of_meta_chunks = 0;
1142 else
1143 num_of_meta_chunks -= num_of_allocated_meta_chunks;
1144
1145 total_size = allocated_total_size + dir_size +
1146 (num_of_meta_chunks * default_chunk_size);
1147
1148 *num_of_meta_chunks_ret = num_of_meta_chunks;
1149
1150 return total_size;
1151 }
1152
1153 static int zero_output_file(int out_fd, u64 size, u32 sectorsize)
1154 {
1155 int len = sectorsize;
1156 int loop_num = size / sectorsize;
1157 u64 location = 0;
1158 char *buf = malloc(len);
1159 int ret = 0, i;
1160 ssize_t written;
1161
1162 if (!buf)
1163 return -ENOMEM;
1164 memset(buf, 0, len);
1165 for (i = 0; i < loop_num; i++) {
1166 written = pwrite64(out_fd, buf, len, location);
1167 if (written != len)
1168 ret = -EIO;
1169 location += sectorsize;
1170 }
1171 free(buf);
1172 return ret;
1173 }
1174
1175 static int check_leaf_or_node_size(u32 size, u32 sectorsize)
1176 {
1177 if (size < sectorsize) {
1178 fprintf(stderr,
1179 "Illegal leafsize (or nodesize) %u (smaller than %u)\n",
1180 size, sectorsize);
1181 return -1;
1182 } else if (size > BTRFS_MAX_METADATA_BLOCKSIZE) {
1183 fprintf(stderr,
1184 "Illegal leafsize (or nodesize) %u (larger than %u)\n",
1185 size, BTRFS_MAX_METADATA_BLOCKSIZE);
1186 return -1;
1187 } else if (size & (sectorsize - 1)) {
1188 fprintf(stderr,
1189 "Illegal leafsize (or nodesize) %u (not align to %u)\n",
1190 size, sectorsize);
1191 return -1;
1192 }
1193 return 0;
1194 }
1195
1196 int main(int ac, char **av)
1197 {
1198 char *file;
1199 struct btrfs_root *root;
1200 struct btrfs_trans_handle *trans;
1201 char *label = NULL;
1202 char *first_file;
1203 u64 block_count = 0;
1204 u64 dev_block_count = 0;
1205 u64 blocks[7];
1206 u64 alloc_start = 0;
1207 u64 metadata_profile = 0;
1208 u64 data_profile = 0;
1209 u32 leafsize = getpagesize();
1210 u32 sectorsize = 4096;
1211 u32 nodesize = leafsize;
1212 u32 stripesize = 4096;
1213 int zero_end = 1;
1214 int option_index = 0;
1215 int fd;
1216 int ret;
1217 int i;
1218 int mixed = 0;
1219 int data_profile_opt = 0;
1220 int metadata_profile_opt = 0;
1221 int nodiscard = 0;
1222
1223 char *source_dir = NULL;
1224 int source_dir_set = 0;
1225 u64 num_of_meta_chunks = 0;
1226 u64 size_of_data = 0;
1227 u64 source_dir_size = 0;
1228 char *pretty_buf;
1229
1230 while(1) {
1231 int c;
1232 c = getopt_long(ac, av, "A:b:l:n:s:m:d:L:r:VMK", long_options,
1233 &option_index);
1234 if (c < 0)
1235 break;
1236 switch(c) {
1237 case 'A':
1238 alloc_start = parse_size(optarg);
1239 break;
1240 case 'd':
1241 data_profile = parse_profile(optarg);
1242 data_profile_opt = 1;
1243 break;
1244 case 'l':
1245 case 'n':
1246 nodesize = parse_size(optarg);
1247 leafsize = parse_size(optarg);
1248 break;
1249 case 'L':
1250 label = parse_label(optarg);
1251 break;
1252 case 'm':
1253 metadata_profile = parse_profile(optarg);
1254 metadata_profile_opt = 1;
1255 break;
1256 case 'M':
1257 mixed = 1;
1258 break;
1259 case 's':
1260 sectorsize = parse_size(optarg);
1261 break;
1262 case 'b':
1263 block_count = parse_size(optarg);
1264 if (block_count <= 1024*1024*1024) {
1265 printf("SMALL VOLUME: forcing mixed "
1266 "metadata/data groups\n");
1267 mixed = 1;
1268 }
1269 zero_end = 0;
1270 break;
1271 case 'V':
1272 print_version();
1273 break;
1274 case 'r':
1275 source_dir = optarg;
1276 source_dir_set = 1;
1277 break;
1278 case 'K':
1279 nodiscard=1;
1280 break;
1281 default:
1282 print_usage();
1283 }
1284 }
1285 sectorsize = max(sectorsize, (u32)getpagesize());
1286 if (check_leaf_or_node_size(leafsize, sectorsize))
1287 exit(1);
1288 if (check_leaf_or_node_size(nodesize, sectorsize))
1289 exit(1);
1290 ac = ac - optind;
1291 if (ac == 0)
1292 print_usage();
1293
1294 printf("\nWARNING! - %s IS EXPERIMENTAL\n", BTRFS_BUILD_VERSION);
1295 printf("WARNING! - see http://btrfs.wiki.kernel.org before using\n\n");
1296
1297 if (source_dir == 0) {
1298 file = av[optind++];
1299 ret = check_mounted(file);
1300 if (ret < 0) {
1301 fprintf(stderr, "error checking %s mount status\n", file);
1302 exit(1);
1303 }
1304 if (ret == 1) {
1305 fprintf(stderr, "%s is mounted\n", file);
1306 exit(1);
1307 }
1308 ac--;
1309 fd = open(file, O_RDWR);
1310 if (fd < 0) {
1311 fprintf(stderr, "unable to open %s\n", file);
1312 exit(1);
1313 }
1314 first_file = file;
1315 ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count,
1316 block_count, &mixed, nodiscard);
1317 if (block_count && block_count > dev_block_count) {
1318 fprintf(stderr, "%s is smaller than requested size\n", file);
1319 exit(1);
1320 }
1321 } else {
1322 ac = 0;
1323 file = av[optind++];
1324 fd = open_target(file);
1325 if (fd < 0) {
1326 fprintf(stderr, "unable to open the %s\n", file);
1327 exit(1);
1328 }
1329
1330 first_file = file;
1331 source_dir_size = size_sourcedir(source_dir, sectorsize,
1332 &num_of_meta_chunks, &size_of_data);
1333 if(block_count < source_dir_size)
1334 block_count = source_dir_size;
1335 ret = zero_output_file(fd, block_count, sectorsize);
1336 if (ret) {
1337 fprintf(stderr, "unable to zero the output file\n");
1338 exit(1);
1339 }
1340 }
1341 if (mixed) {
1342 if (metadata_profile != data_profile) {
1343 fprintf(stderr, "With mixed block groups data and metadata "
1344 "profiles must be the same\n");
1345 exit(1);
1346 }
1347 }
1348
1349 blocks[0] = BTRFS_SUPER_INFO_OFFSET;
1350 for (i = 1; i < 7; i++) {
1351 blocks[i] = BTRFS_SUPER_INFO_OFFSET + 1024 * 1024 +
1352 leafsize * i;
1353 }
1354
1355 ret = make_btrfs(fd, file, label, blocks, dev_block_count,
1356 nodesize, leafsize,
1357 sectorsize, stripesize);
1358 if (ret) {
1359 fprintf(stderr, "error during mkfs %d\n", ret);
1360 exit(1);
1361 }
1362
1363 root = open_ctree(file, 0, O_RDWR);
1364 if (!root) {
1365 fprintf(stderr, "ctree init failed\n");
1366 exit(1);
1367 }
1368 root->fs_info->alloc_start = alloc_start;
1369
1370 ret = make_root_dir(root, mixed);
1371 if (ret) {
1372 fprintf(stderr, "failed to setup the root directory\n");
1373 exit(1);
1374 }
1375
1376 trans = btrfs_start_transaction(root, 1);
1377
1378 if (ac == 0)
1379 goto raid_groups;
1380
1381 btrfs_register_one_device(file);
1382
1383 zero_end = 1;
1384 while(ac-- > 0) {
1385 int old_mixed = mixed;
1386
1387 file = av[optind++];
1388 ret = check_mounted(file);
1389 if (ret < 0) {
1390 fprintf(stderr, "error checking %s mount status\n",
1391 file);
1392 exit(1);
1393 }
1394 if (ret == 1) {
1395 fprintf(stderr, "%s is mounted\n", file);
1396 exit(1);
1397 }
1398 fd = open(file, O_RDWR);
1399 if (fd < 0) {
1400 fprintf(stderr, "unable to open %s\n", file);
1401 exit(1);
1402 }
1403 ret = btrfs_device_already_in_root(root, fd,
1404 BTRFS_SUPER_INFO_OFFSET);
1405 if (ret) {
1406 fprintf(stderr, "skipping duplicate device %s in FS\n",
1407 file);
1408 close(fd);
1409 continue;
1410 }
1411 ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count,
1412 block_count, &mixed, nodiscard);
1413 mixed = old_mixed;
1414 BUG_ON(ret);
1415
1416 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
1417 sectorsize, sectorsize, sectorsize);
1418 BUG_ON(ret);
1419 btrfs_register_one_device(file);
1420 }
1421
1422 raid_groups:
1423 if (!source_dir_set) {
1424 ret = create_raid_groups(trans, root, data_profile,
1425 data_profile_opt, metadata_profile,
1426 metadata_profile_opt, mixed);
1427 BUG_ON(ret);
1428 }
1429
1430 ret = create_data_reloc_tree(trans, root);
1431 BUG_ON(ret);
1432
1433 if (mixed) {
1434 struct btrfs_super_block *super = &root->fs_info->super_copy;
1435 u64 flags = btrfs_super_incompat_flags(super);
1436
1437 flags |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
1438 btrfs_set_super_incompat_flags(super, flags);
1439 }
1440
1441 printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
1442 "sectorsize %u size %s\n",
1443 label, first_file, nodesize, leafsize, sectorsize,
1444 pretty_buf = pretty_sizes(btrfs_super_total_bytes(&root->fs_info->super_copy)));
1445 free(pretty_buf);
1446
1447 printf("%s\n", BTRFS_BUILD_VERSION);
1448 btrfs_commit_transaction(trans, root);
1449
1450 if (source_dir_set) {
1451 trans = btrfs_start_transaction(root, 1);
1452 ret = create_chunks(trans, root,
1453 num_of_meta_chunks, size_of_data);
1454 BUG_ON(ret);
1455 btrfs_commit_transaction(trans, root);
1456
1457 ret = make_image(source_dir, root, fd);
1458 BUG_ON(ret);
1459 }
1460
1461 ret = close_ctree(root);
1462 BUG_ON(ret);
1463
1464 free(label);
1465 return 0;
1466 }
1467
(deprecated) Btrfs progs developments and patch integration