2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #include "kerncompat.h"
20 #include "androidcompat.h"
22 #include <sys/ioctl.h>
23 #include <sys/mount.h>
27 /* #include <sys/dir.h> included via androidcompat.h */
31 #include <uuid/uuid.h>
33 #include <blkid/blkid.h>
37 #include "transaction.h"
39 #include "list_sort.h"
41 #include "mkfs/common.h"
42 #include "mkfs/rootdir.h"
43 #include "fsfeatures.h"
45 static int verbose = 1;
47 struct mkfs_allocation {
54 static int create_metadata_block_groups(struct btrfs_root *root, int mixed,
55 struct mkfs_allocation *allocation)
57 struct btrfs_fs_info *fs_info = root->fs_info;
58 struct btrfs_trans_handle *trans;
64 trans = btrfs_start_transaction(root, 1);
65 BUG_ON(IS_ERR(trans));
66 bytes_used = btrfs_super_bytes_used(fs_info->super_copy);
68 root->fs_info->system_allocs = 1;
69 ret = btrfs_make_block_group(trans, fs_info, bytes_used,
70 BTRFS_BLOCK_GROUP_SYSTEM,
71 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
72 0, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
73 allocation->system += BTRFS_MKFS_SYSTEM_GROUP_SIZE;
78 ret = btrfs_alloc_chunk(trans, fs_info,
79 &chunk_start, &chunk_size,
80 BTRFS_BLOCK_GROUP_METADATA |
81 BTRFS_BLOCK_GROUP_DATA);
83 error("no space to allocate data/metadata chunk");
88 ret = btrfs_make_block_group(trans, fs_info, 0,
89 BTRFS_BLOCK_GROUP_METADATA |
90 BTRFS_BLOCK_GROUP_DATA,
91 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
92 chunk_start, chunk_size);
95 allocation->mixed += chunk_size;
97 ret = btrfs_alloc_chunk(trans, fs_info,
98 &chunk_start, &chunk_size,
99 BTRFS_BLOCK_GROUP_METADATA);
100 if (ret == -ENOSPC) {
101 error("no space to allocate metadata chunk");
106 ret = btrfs_make_block_group(trans, fs_info, 0,
107 BTRFS_BLOCK_GROUP_METADATA,
108 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
109 chunk_start, chunk_size);
110 allocation->metadata += chunk_size;
115 root->fs_info->system_allocs = 0;
116 ret = btrfs_commit_transaction(trans, root);
122 static int create_data_block_groups(struct btrfs_trans_handle *trans,
123 struct btrfs_root *root, int mixed,
124 struct mkfs_allocation *allocation)
126 struct btrfs_fs_info *fs_info = root->fs_info;
132 ret = btrfs_alloc_chunk(trans, fs_info,
133 &chunk_start, &chunk_size,
134 BTRFS_BLOCK_GROUP_DATA);
135 if (ret == -ENOSPC) {
136 error("no space to allocate data chunk");
141 ret = btrfs_make_block_group(trans, fs_info, 0,
142 BTRFS_BLOCK_GROUP_DATA,
143 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
144 chunk_start, chunk_size);
145 allocation->data += chunk_size;
154 static int make_root_dir(struct btrfs_trans_handle *trans,
155 struct btrfs_root *root)
157 struct btrfs_key location;
160 ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
161 BTRFS_ROOT_TREE_DIR_OBJECTID);
164 ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
167 memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
168 location.offset = (u64)-1;
169 ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
171 btrfs_super_root_dir(root->fs_info->super_copy),
172 &location, BTRFS_FT_DIR, 0);
176 ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
177 "default", 7, location.objectid,
178 BTRFS_ROOT_TREE_DIR_OBJECTID, 0);
186 static int __recow_root(struct btrfs_trans_handle *trans,
187 struct btrfs_root *root)
189 struct extent_buffer *tmp;
192 if (trans->transid != btrfs_root_generation(&root->root_item)) {
193 extent_buffer_get(root->node);
194 ret = __btrfs_cow_block(trans, root, root->node,
195 NULL, 0, &tmp, 0, 0);
198 free_extent_buffer(tmp);
204 static int recow_roots(struct btrfs_trans_handle *trans,
205 struct btrfs_root *root)
207 struct btrfs_fs_info *info = root->fs_info;
210 ret = __recow_root(trans, info->fs_root);
213 ret = __recow_root(trans, info->tree_root);
216 ret = __recow_root(trans, info->extent_root);
219 ret = __recow_root(trans, info->chunk_root);
222 ret = __recow_root(trans, info->dev_root);
225 ret = __recow_root(trans, info->csum_root);
232 static int create_one_raid_group(struct btrfs_trans_handle *trans,
233 struct btrfs_root *root, u64 type,
234 struct mkfs_allocation *allocation)
237 struct btrfs_fs_info *fs_info = root->fs_info;
242 ret = btrfs_alloc_chunk(trans, fs_info,
243 &chunk_start, &chunk_size, type);
244 if (ret == -ENOSPC) {
245 error("not enough free space to allocate chunk");
251 ret = btrfs_make_block_group(trans, fs_info, 0,
252 type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
253 chunk_start, chunk_size);
255 type &= BTRFS_BLOCK_GROUP_TYPE_MASK;
256 if (type == BTRFS_BLOCK_GROUP_DATA) {
257 allocation->data += chunk_size;
258 } else if (type == BTRFS_BLOCK_GROUP_METADATA) {
259 allocation->metadata += chunk_size;
260 } else if (type == BTRFS_BLOCK_GROUP_SYSTEM) {
261 allocation->system += chunk_size;
263 (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA)) {
264 allocation->mixed += chunk_size;
266 error("unrecognized profile type: 0x%llx",
267 (unsigned long long)type);
274 static int create_raid_groups(struct btrfs_trans_handle *trans,
275 struct btrfs_root *root, u64 data_profile,
276 u64 metadata_profile, int mixed,
277 struct mkfs_allocation *allocation)
281 if (metadata_profile) {
282 u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA;
284 ret = create_one_raid_group(trans, root,
285 BTRFS_BLOCK_GROUP_SYSTEM |
286 metadata_profile, allocation);
291 meta_flags |= BTRFS_BLOCK_GROUP_DATA;
293 ret = create_one_raid_group(trans, root, meta_flags |
294 metadata_profile, allocation);
299 if (!mixed && data_profile) {
300 ret = create_one_raid_group(trans, root,
301 BTRFS_BLOCK_GROUP_DATA |
302 data_profile, allocation);
306 ret = recow_roots(trans, root);
311 static int create_tree(struct btrfs_trans_handle *trans,
312 struct btrfs_root *root, u64 objectid)
314 struct btrfs_key location;
315 struct btrfs_root_item root_item;
316 struct extent_buffer *tmp;
319 ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
323 memcpy(&root_item, &root->root_item, sizeof(root_item));
324 btrfs_set_root_bytenr(&root_item, tmp->start);
325 btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
326 btrfs_set_root_generation(&root_item, trans->transid);
327 free_extent_buffer(tmp);
329 location.objectid = objectid;
330 location.type = BTRFS_ROOT_ITEM_KEY;
332 ret = btrfs_insert_root(trans, root->fs_info->tree_root,
333 &location, &root_item);
338 static void print_usage(int ret)
340 printf("Usage: mkfs.btrfs [options] dev [ dev ... ]\n");
341 printf("Options:\n");
342 printf(" allocation profiles:\n");
343 printf("\t-d|--data PROFILE data profile, raid0, raid1, raid5, raid6, raid10, dup or single\n");
344 printf("\t-m|--metadata PROFILE metadata profile, values like for data profile\n");
345 printf("\t-M|--mixed mix metadata and data together\n");
346 printf(" features:\n");
347 printf("\t-n|--nodesize SIZE size of btree nodes\n");
348 printf("\t-s|--sectorsize SIZE data block size (may not be mountable by current kernel)\n");
349 printf("\t-O|--features LIST comma separated list of filesystem features (use '-O list-all' to list features)\n");
350 printf("\t-L|--label LABEL set the filesystem label\n");
351 printf("\t-U|--uuid UUID specify the filesystem UUID (must be unique)\n");
352 printf(" creation:\n");
353 printf("\t-b|--byte-count SIZE set filesystem size to SIZE (on the first device)\n");
354 printf("\t-r|--rootdir DIR copy files from DIR to the image root directory\n");
355 printf("\t-K|--nodiscard do not perform whole device TRIM\n");
356 printf("\t-f|--force force overwrite of existing filesystem\n");
357 printf(" general:\n");
358 printf("\t-q|--quiet no messages except errors\n");
359 printf("\t-V|--version print the mkfs.btrfs version and exit\n");
360 printf("\t--help print this help and exit\n");
361 printf(" deprecated:\n");
362 printf("\t-A|--alloc-start START the offset to start the filesystem\n");
363 printf("\t-l|--leafsize SIZE deprecated, alias for nodesize\n");
367 static u64 parse_profile(const char *s)
369 if (strcasecmp(s, "raid0") == 0) {
370 return BTRFS_BLOCK_GROUP_RAID0;
371 } else if (strcasecmp(s, "raid1") == 0) {
372 return BTRFS_BLOCK_GROUP_RAID1;
373 } else if (strcasecmp(s, "raid5") == 0) {
374 return BTRFS_BLOCK_GROUP_RAID5;
375 } else if (strcasecmp(s, "raid6") == 0) {
376 return BTRFS_BLOCK_GROUP_RAID6;
377 } else if (strcasecmp(s, "raid10") == 0) {
378 return BTRFS_BLOCK_GROUP_RAID10;
379 } else if (strcasecmp(s, "dup") == 0) {
380 return BTRFS_BLOCK_GROUP_DUP;
381 } else if (strcasecmp(s, "single") == 0) {
384 error("unknown profile %s", s);
391 static char *parse_label(const char *input)
393 int len = strlen(input);
395 if (len >= BTRFS_LABEL_SIZE) {
396 error("label %s is too long (max %d)", input,
397 BTRFS_LABEL_SIZE - 1);
400 return strdup(input);
403 static int create_chunks(struct btrfs_trans_handle *trans,
404 struct btrfs_root *root, u64 num_of_meta_chunks,
406 struct mkfs_allocation *allocation)
408 struct btrfs_fs_info *fs_info = root->fs_info;
411 u64 meta_type = BTRFS_BLOCK_GROUP_METADATA;
412 u64 data_type = BTRFS_BLOCK_GROUP_DATA;
413 u64 minimum_data_chunk_size = SZ_8M;
417 for (i = 0; i < num_of_meta_chunks; i++) {
418 ret = btrfs_alloc_chunk(trans, fs_info,
419 &chunk_start, &chunk_size, meta_type);
422 ret = btrfs_make_block_group(trans, fs_info, 0,
423 meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
424 chunk_start, chunk_size);
425 allocation->metadata += chunk_size;
428 set_extent_dirty(&root->fs_info->free_space_cache,
429 chunk_start, chunk_start + chunk_size - 1);
432 if (size_of_data < minimum_data_chunk_size)
433 size_of_data = minimum_data_chunk_size;
435 ret = btrfs_alloc_data_chunk(trans, fs_info,
436 &chunk_start, size_of_data, data_type, 0);
439 ret = btrfs_make_block_group(trans, fs_info, 0,
440 data_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
441 chunk_start, size_of_data);
442 allocation->data += size_of_data;
445 set_extent_dirty(&root->fs_info->free_space_cache,
446 chunk_start, chunk_start + size_of_data - 1);
450 static int zero_output_file(int out_fd, u64 size)
458 memset(buf, 0, SZ_4K);
460 /* Only zero out the first 1M */
461 loop_num = SZ_1M / SZ_4K;
462 for (i = 0; i < loop_num; i++) {
463 written = pwrite64(out_fd, buf, SZ_4K, location);
464 if (written != SZ_4K)
469 /* Then enlarge the file to size */
470 written = pwrite64(out_fd, buf, 1, size - 1);
476 static int is_ssd(const char *file)
479 char wholedisk[PATH_MAX];
480 char sysfs_path[PATH_MAX];
486 probe = blkid_new_probe_from_filename(file);
490 /* Device number of this disk (possibly a partition) */
491 devno = blkid_probe_get_devno(probe);
493 blkid_free_probe(probe);
497 /* Get whole disk name (not full path) for this devno */
498 ret = blkid_devno_to_wholedisk(devno,
499 wholedisk, sizeof(wholedisk), NULL);
501 blkid_free_probe(probe);
505 snprintf(sysfs_path, PATH_MAX, "/sys/block/%s/queue/rotational",
508 blkid_free_probe(probe);
510 fd = open(sysfs_path, O_RDONLY);
515 if (read(fd, &rotational, 1) < 1) {
521 return rotational == '0';
524 static int _cmp_device_by_id(void *priv, struct list_head *a,
527 return list_entry(a, struct btrfs_device, dev_list)->devid -
528 list_entry(b, struct btrfs_device, dev_list)->devid;
531 static void list_all_devices(struct btrfs_root *root)
533 struct btrfs_fs_devices *fs_devices;
534 struct btrfs_device *device;
535 int number_of_devices = 0;
536 u64 total_block_count = 0;
538 fs_devices = root->fs_info->fs_devices;
540 list_for_each_entry(device, &fs_devices->devices, dev_list)
543 list_sort(NULL, &fs_devices->devices, _cmp_device_by_id);
545 printf("Number of devices: %d\n", number_of_devices);
546 /* printf("Total devices size: %10s\n", */
547 /* pretty_size(total_block_count)); */
548 printf("Devices:\n");
549 printf(" ID SIZE PATH\n");
550 list_for_each_entry(device, &fs_devices->devices, dev_list) {
551 printf(" %3llu %10s %s\n",
553 pretty_size(device->total_bytes),
555 total_block_count += device->total_bytes;
561 static int is_temp_block_group(struct extent_buffer *node,
562 struct btrfs_block_group_item *bgi,
563 u64 data_profile, u64 meta_profile,
566 u64 flag = btrfs_disk_block_group_flags(node, bgi);
567 u64 flag_type = flag & BTRFS_BLOCK_GROUP_TYPE_MASK;
568 u64 flag_profile = flag & BTRFS_BLOCK_GROUP_PROFILE_MASK;
569 u64 used = btrfs_disk_block_group_used(node, bgi);
572 * Chunks meets all the following conditions is a temp chunk
574 * Temp chunk is always empty.
576 * 2) profile mismatch with mkfs profile.
577 * Temp chunk is always in SINGLE
579 * 3) Size differs with mkfs_alloc
580 * Special case for SINGLE/SINGLE btrfs.
581 * In that case, temp data chunk and real data chunk are always empty.
582 * So we need to use mkfs_alloc to be sure which chunk is the newly
585 * Normally, new chunk size is equal to mkfs one (One chunk)
586 * If it has multiple chunks, we just refuse to delete any one.
587 * As they are all single, so no real problem will happen.
588 * So only use condition 1) and 2) to judge them.
593 case BTRFS_BLOCK_GROUP_DATA:
594 case BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA:
595 data_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
596 if (flag_profile != data_profile)
599 case BTRFS_BLOCK_GROUP_METADATA:
600 meta_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
601 if (flag_profile != meta_profile)
604 case BTRFS_BLOCK_GROUP_SYSTEM:
605 sys_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
606 if (flag_profile != sys_profile)
613 /* Note: if current is a block group, it will skip it anyway */
614 static int next_block_group(struct btrfs_root *root,
615 struct btrfs_path *path)
617 struct btrfs_key key;
621 ret = btrfs_next_item(root, path);
625 btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
626 if (key.type == BTRFS_BLOCK_GROUP_ITEM_KEY)
633 /* This function will cleanup */
634 static int cleanup_temp_chunks(struct btrfs_fs_info *fs_info,
635 struct mkfs_allocation *alloc,
636 u64 data_profile, u64 meta_profile,
639 struct btrfs_trans_handle *trans = NULL;
640 struct btrfs_block_group_item *bgi;
641 struct btrfs_root *root = fs_info->extent_root;
642 struct btrfs_key key;
643 struct btrfs_key found_key;
644 struct btrfs_path path;
647 btrfs_init_path(&path);
648 trans = btrfs_start_transaction(root, 1);
649 BUG_ON(IS_ERR(trans));
652 key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
657 * as the rest of the loop may modify the tree, we need to
658 * start a new search each time.
660 ret = btrfs_search_slot(trans, root, &key, &path, 0, 0);
663 /* Don't pollute ret for >0 case */
667 btrfs_item_key_to_cpu(path.nodes[0], &found_key,
669 if (found_key.objectid < key.objectid)
671 if (found_key.type != BTRFS_BLOCK_GROUP_ITEM_KEY) {
672 ret = next_block_group(root, &path);
679 btrfs_item_key_to_cpu(path.nodes[0], &found_key,
683 bgi = btrfs_item_ptr(path.nodes[0], path.slots[0],
684 struct btrfs_block_group_item);
685 if (is_temp_block_group(path.nodes[0], bgi,
686 data_profile, meta_profile,
688 u64 flags = btrfs_disk_block_group_flags(path.nodes[0],
691 ret = btrfs_free_block_group(trans, fs_info,
692 found_key.objectid, found_key.offset);
696 if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
697 BTRFS_BLOCK_GROUP_DATA)
698 alloc->data -= found_key.offset;
699 else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
700 BTRFS_BLOCK_GROUP_METADATA)
701 alloc->metadata -= found_key.offset;
702 else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
703 BTRFS_BLOCK_GROUP_SYSTEM)
704 alloc->system -= found_key.offset;
705 else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
706 (BTRFS_BLOCK_GROUP_METADATA |
707 BTRFS_BLOCK_GROUP_DATA))
708 alloc->mixed -= found_key.offset;
710 btrfs_release_path(&path);
711 key.objectid = found_key.objectid + found_key.offset;
715 btrfs_commit_transaction(trans, root);
716 btrfs_release_path(&path);
721 * Just update chunk allocation info, since --rootdir may allocate new
722 * chunks which is not updated in @allocation structure.
724 static void update_chunk_allocation(struct btrfs_fs_info *fs_info,
725 struct mkfs_allocation *allocation)
727 struct btrfs_block_group_cache *bg_cache;
728 const u64 mixed_flag = BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA;
729 u64 search_start = 0;
731 allocation->mixed = 0;
732 allocation->data = 0;
733 allocation->metadata = 0;
734 allocation->system = 0;
736 bg_cache = btrfs_lookup_first_block_group(fs_info,
740 if ((bg_cache->flags & mixed_flag) == mixed_flag)
741 allocation->mixed += bg_cache->key.offset;
742 else if (bg_cache->flags & BTRFS_BLOCK_GROUP_DATA)
743 allocation->data += bg_cache->key.offset;
744 else if (bg_cache->flags & BTRFS_BLOCK_GROUP_METADATA)
745 allocation->metadata += bg_cache->key.offset;
747 allocation->system += bg_cache->key.offset;
748 search_start = bg_cache->key.objectid + bg_cache->key.offset;
752 int main(int argc, char **argv)
755 struct btrfs_root *root;
756 struct btrfs_fs_info *fs_info;
757 struct btrfs_trans_handle *trans;
760 u64 dev_block_count = 0;
762 u64 metadata_profile = 0;
763 u64 data_profile = 0;
764 u32 nodesize = max_t(u32, sysconf(_SC_PAGESIZE),
765 BTRFS_MKFS_DEFAULT_NODE_SIZE);
766 u32 sectorsize = 4096;
767 u32 stripesize = 4096;
774 int nodesize_forced = 0;
775 int data_profile_opt = 0;
776 int metadata_profile_opt = 0;
779 int force_overwrite = 0;
780 char *source_dir = NULL;
781 int source_dir_set = 0;
782 u64 num_of_meta_chunks = 0;
783 u64 size_of_data = 0;
784 u64 source_dir_size = 0;
788 char fs_uuid[BTRFS_UUID_UNPARSED_SIZE] = { 0 };
789 u64 features = BTRFS_MKFS_DEFAULT_FEATURES;
790 struct mkfs_allocation allocation = { 0 };
791 struct btrfs_mkfs_config mkfs_cfg;
795 static const struct option long_options[] = {
796 { "alloc-start", required_argument, NULL, 'A'},
797 { "byte-count", required_argument, NULL, 'b' },
798 { "force", no_argument, NULL, 'f' },
799 { "leafsize", required_argument, NULL, 'l' },
800 { "label", required_argument, NULL, 'L'},
801 { "metadata", required_argument, NULL, 'm' },
802 { "mixed", no_argument, NULL, 'M' },
803 { "nodesize", required_argument, NULL, 'n' },
804 { "sectorsize", required_argument, NULL, 's' },
805 { "data", required_argument, NULL, 'd' },
806 { "version", no_argument, NULL, 'V' },
807 { "rootdir", required_argument, NULL, 'r' },
808 { "nodiscard", no_argument, NULL, 'K' },
809 { "features", required_argument, NULL, 'O' },
810 { "uuid", required_argument, NULL, 'U' },
811 { "quiet", 0, NULL, 'q' },
812 { "help", no_argument, NULL, GETOPT_VAL_HELP },
816 c = getopt_long(argc, argv, "A:b:fl:n:s:m:d:L:O:r:U:VMKq",
822 alloc_start = parse_size(optarg);
828 data_profile = parse_profile(optarg);
829 data_profile_opt = 1;
832 warning("--leafsize is deprecated, use --nodesize");
835 nodesize = parse_size(optarg);
839 label = parse_label(optarg);
842 metadata_profile = parse_profile(optarg);
843 metadata_profile_opt = 1;
849 char *orig = strdup(optarg);
852 tmp = btrfs_parse_fs_features(tmp, &features);
854 error("unrecognized filesystem feature '%s'",
860 if (features & BTRFS_FEATURE_LIST_ALL) {
861 btrfs_list_all_fs_features(0);
867 sectorsize = parse_size(optarg);
870 block_count = parse_size(optarg);
874 printf("mkfs.btrfs, part of %s\n",
882 strncpy(fs_uuid, optarg,
883 BTRFS_UUID_UNPARSED_SIZE - 1);
891 case GETOPT_VAL_HELP:
893 print_usage(c != GETOPT_VAL_HELP);
898 printf("%s\n", PACKAGE_STRING);
899 printf("See %s for more information.\n\n", PACKAGE_URL);
902 sectorsize = max(sectorsize, (u32)sysconf(_SC_PAGESIZE));
903 stripesize = sectorsize;
904 saved_optind = optind;
905 dev_cnt = argc - optind;
909 if (source_dir_set && dev_cnt > 1) {
910 error("the option -r is limited to a single device");
917 if (uuid_parse(fs_uuid, dummy_uuid) != 0) {
918 error("could not parse UUID: %s", fs_uuid);
921 if (!test_uuid_unique(fs_uuid)) {
922 error("non-unique UUID: %s", fs_uuid);
927 while (dev_cnt-- > 0) {
928 file = argv[optind++];
929 if (is_block_device(file) == 1)
930 ret = test_dev_for_mkfs(file, force_overwrite);
932 ret = test_status_for_mkfs(file, force_overwrite);
938 optind = saved_optind;
939 dev_cnt = argc - optind;
941 file = argv[optind++];
945 * Set default profiles according to number of added devices.
946 * For mixed groups defaults are single/single.
949 if (!metadata_profile_opt) {
950 if (dev_cnt == 1 && ssd && verbose)
951 printf("Detected a SSD, turning off metadata "
952 "duplication. Mkfs with -m dup if you want to "
953 "force metadata duplication.\n");
955 metadata_profile = (dev_cnt > 1) ?
956 BTRFS_BLOCK_GROUP_RAID1 : (ssd) ?
957 0: BTRFS_BLOCK_GROUP_DUP;
959 if (!data_profile_opt) {
960 data_profile = (dev_cnt > 1) ?
961 BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */
964 u32 best_nodesize = max_t(u32, sysconf(_SC_PAGESIZE), sectorsize);
966 if (metadata_profile_opt || data_profile_opt) {
967 if (metadata_profile != data_profile) {
969 "with mixed block groups data and metadata profiles must be the same");
974 if (!nodesize_forced)
975 nodesize = best_nodesize;
979 * FS features that can be set by other means than -O
980 * just set the bit here
983 features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
985 if ((data_profile | metadata_profile) &
986 (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
987 features |= BTRFS_FEATURE_INCOMPAT_RAID56;
990 if (btrfs_check_nodesize(nodesize, sectorsize,
994 if (sectorsize < sizeof(struct btrfs_super_block)) {
995 error("sectorsize smaller than superblock: %u < %zu",
996 sectorsize, sizeof(struct btrfs_super_block));
1000 min_dev_size = btrfs_min_dev_size(nodesize, mixed, metadata_profile,
1002 /* Check device/block_count after the nodesize is determined */
1003 if (block_count && block_count < min_dev_size) {
1004 error("size %llu is too small to make a usable filesystem",
1006 error("minimum size for btrfs filesystem is %llu",
1010 for (i = saved_optind; i < saved_optind + dev_cnt; i++) {
1014 ret = test_minimum_size(path, min_dev_size);
1016 error("failed to check size for %s: %s",
1017 path, strerror(-ret));
1021 error("'%s' is too small to make a usable filesystem",
1023 error("minimum size for each btrfs device is %llu",
1028 ret = test_num_disk_vs_raid(metadata_profile, data_profile,
1029 dev_cnt, mixed, ssd);
1035 if (!source_dir_set) {
1037 * open without O_EXCL so that the problem should not
1038 * occur by the following processing.
1039 * (btrfs_register_one_device() fails if O_EXCL is on)
1041 fd = open(file, O_RDWR);
1043 error("unable to open %s: %s", file, strerror(errno));
1046 ret = btrfs_prepare_device(fd, file, &dev_block_count,
1048 (zero_end ? PREP_DEVICE_ZERO_END : 0) |
1049 (discard ? PREP_DEVICE_DISCARD : 0) |
1050 (verbose ? PREP_DEVICE_VERBOSE : 0));
1054 if (block_count && block_count > dev_block_count) {
1055 error("%s is smaller than requested size, expected %llu, found %llu",
1057 (unsigned long long)block_count,
1058 (unsigned long long)dev_block_count);
1062 fd = open(file, O_CREAT | O_RDWR,
1063 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
1065 error("unable to open %s: %s", file, strerror(errno));
1069 source_dir_size = btrfs_mkfs_size_dir(source_dir, sectorsize,
1070 &num_of_meta_chunks, &size_of_data);
1071 if(block_count < source_dir_size)
1072 block_count = source_dir_size;
1073 ret = zero_output_file(fd, block_count);
1075 error("unable to zero the output file");
1078 /* our "device" is the new image file */
1079 dev_block_count = block_count;
1082 /* To create the first block group and chunk 0 in make_btrfs */
1083 if (dev_block_count < BTRFS_MKFS_SYSTEM_GROUP_SIZE) {
1084 error("device is too small to make filesystem, must be at least %llu",
1085 (unsigned long long)BTRFS_MKFS_SYSTEM_GROUP_SIZE);
1089 if (group_profile_max_safe_loss(metadata_profile) <
1090 group_profile_max_safe_loss(data_profile)){
1091 warning("metadata has lower redundancy than data!\n");
1094 mkfs_cfg.label = label;
1095 memcpy(mkfs_cfg.fs_uuid, fs_uuid, sizeof(mkfs_cfg.fs_uuid));
1096 mkfs_cfg.num_bytes = dev_block_count;
1097 mkfs_cfg.nodesize = nodesize;
1098 mkfs_cfg.sectorsize = sectorsize;
1099 mkfs_cfg.stripesize = stripesize;
1100 mkfs_cfg.features = features;
1102 ret = make_btrfs(fd, &mkfs_cfg);
1104 error("error during mkfs: %s", strerror(-ret));
1108 fs_info = open_ctree_fs_info(file, 0, 0, 0,
1109 OPEN_CTREE_WRITES | OPEN_CTREE_FS_PARTIAL);
1111 error("open ctree failed");
1116 root = fs_info->fs_root;
1117 fs_info->alloc_start = alloc_start;
1119 ret = create_metadata_block_groups(root, mixed, &allocation);
1121 error("failed to create default block groups: %d", ret);
1125 trans = btrfs_start_transaction(root, 1);
1126 if (IS_ERR(trans)) {
1127 error("failed to start transaction");
1131 ret = create_data_block_groups(trans, root, mixed, &allocation);
1133 error("failed to create default data block groups: %d", ret);
1137 ret = make_root_dir(trans, root);
1139 error("failed to setup the root directory: %d", ret);
1143 ret = btrfs_commit_transaction(trans, root);
1145 error("unable to commit transaction: %d", ret);
1149 trans = btrfs_start_transaction(root, 1);
1150 if (IS_ERR(trans)) {
1151 error("failed to start transaction");
1158 while (dev_cnt-- > 0) {
1159 file = argv[optind++];
1162 * open without O_EXCL so that the problem should not
1163 * occur by the following processing.
1164 * (btrfs_register_one_device() fails if O_EXCL is on)
1166 fd = open(file, O_RDWR);
1168 error("unable to open %s: %s", file, strerror(errno));
1171 ret = btrfs_device_already_in_root(root, fd,
1172 BTRFS_SUPER_INFO_OFFSET);
1174 error("skipping duplicate device %s in the filesystem",
1179 ret = btrfs_prepare_device(fd, file, &dev_block_count,
1181 (verbose ? PREP_DEVICE_VERBOSE : 0) |
1182 (zero_end ? PREP_DEVICE_ZERO_END : 0) |
1183 (discard ? PREP_DEVICE_DISCARD : 0));
1188 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
1189 sectorsize, sectorsize, sectorsize);
1191 error("unable to add %s to filesystem: %d", file, ret);
1195 struct btrfs_device *device;
1197 device = container_of(fs_info->fs_devices->devices.next,
1198 struct btrfs_device, dev_list);
1199 printf("adding device %s id %llu\n", file,
1200 (unsigned long long)device->devid);
1205 if (!source_dir_set) {
1206 ret = create_raid_groups(trans, root, data_profile,
1207 metadata_profile, mixed, &allocation);
1209 error("unable to create raid groups: %d", ret);
1214 ret = create_tree(trans, root, BTRFS_DATA_RELOC_TREE_OBJECTID);
1216 error("unable to create data reloc tree: %d", ret);
1220 ret = btrfs_commit_transaction(trans, root);
1222 error("unable to commit transaction: %d", ret);
1226 ret = cleanup_temp_chunks(fs_info, &allocation, data_profile,
1227 metadata_profile, metadata_profile);
1229 error("failed to cleanup temporary chunks: %d", ret);
1233 if (source_dir_set) {
1234 trans = btrfs_start_transaction(root, 1);
1235 BUG_ON(IS_ERR(trans));
1236 ret = create_chunks(trans, root,
1237 num_of_meta_chunks, size_of_data,
1240 error("unable to create chunks: %d", ret);
1243 ret = btrfs_commit_transaction(trans, root);
1245 error("transaction commit failed: %d", ret);
1249 ret = btrfs_mkfs_fill_dir(source_dir, root, verbose);
1251 error("error wihle filling filesystem: %d", ret);
1257 char features_buf[64];
1259 update_chunk_allocation(fs_info, &allocation);
1260 printf("Label: %s\n", label);
1261 printf("UUID: %s\n", mkfs_cfg.fs_uuid);
1262 printf("Node size: %u\n", nodesize);
1263 printf("Sector size: %u\n", sectorsize);
1264 printf("Filesystem size: %s\n",
1265 pretty_size(btrfs_super_total_bytes(fs_info->super_copy)));
1266 printf("Block group profiles:\n");
1267 if (allocation.data)
1268 printf(" Data: %-8s %16s\n",
1269 btrfs_group_profile_str(data_profile),
1270 pretty_size(allocation.data));
1271 if (allocation.metadata)
1272 printf(" Metadata: %-8s %16s\n",
1273 btrfs_group_profile_str(metadata_profile),
1274 pretty_size(allocation.metadata));
1275 if (allocation.mixed)
1276 printf(" Data+Metadata: %-8s %16s\n",
1277 btrfs_group_profile_str(data_profile),
1278 pretty_size(allocation.mixed));
1279 printf(" System: %-8s %16s\n",
1280 btrfs_group_profile_str(metadata_profile),
1281 pretty_size(allocation.system));
1282 printf("SSD detected: %s\n", ssd ? "yes" : "no");
1283 btrfs_parse_features_to_string(features_buf, features);
1284 printf("Incompat features: %s", features_buf);
1287 list_all_devices(root);
1291 * The filesystem is now fully set up, commit the remaining changes and
1292 * fix the signature as the last step before closing the devices.
1294 fs_info->finalize_on_close = 1;
1296 close_ret = close_ctree(root);
1299 optind = saved_optind;
1300 dev_cnt = argc - optind;
1301 while (dev_cnt-- > 0) {
1302 file = argv[optind++];
1303 if (is_block_device(file) == 1)
1304 btrfs_register_one_device(file);
1308 btrfs_close_all_devices();