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 zero_output_file(int out_fd, u64 size)
411 memset(buf, 0, SZ_4K);
413 /* Only zero out the first 1M */
414 loop_num = SZ_1M / SZ_4K;
415 for (i = 0; i < loop_num; i++) {
416 written = pwrite64(out_fd, buf, SZ_4K, location);
417 if (written != SZ_4K)
422 /* Then enlarge the file to size */
423 written = pwrite64(out_fd, buf, 1, size - 1);
429 static int is_ssd(const char *file)
432 char wholedisk[PATH_MAX];
433 char sysfs_path[PATH_MAX];
439 probe = blkid_new_probe_from_filename(file);
443 /* Device number of this disk (possibly a partition) */
444 devno = blkid_probe_get_devno(probe);
446 blkid_free_probe(probe);
450 /* Get whole disk name (not full path) for this devno */
451 ret = blkid_devno_to_wholedisk(devno,
452 wholedisk, sizeof(wholedisk), NULL);
454 blkid_free_probe(probe);
458 snprintf(sysfs_path, PATH_MAX, "/sys/block/%s/queue/rotational",
461 blkid_free_probe(probe);
463 fd = open(sysfs_path, O_RDONLY);
468 if (read(fd, &rotational, 1) < 1) {
474 return rotational == '0';
477 static int _cmp_device_by_id(void *priv, struct list_head *a,
480 return list_entry(a, struct btrfs_device, dev_list)->devid -
481 list_entry(b, struct btrfs_device, dev_list)->devid;
484 static void list_all_devices(struct btrfs_root *root)
486 struct btrfs_fs_devices *fs_devices;
487 struct btrfs_device *device;
488 int number_of_devices = 0;
489 u64 total_block_count = 0;
491 fs_devices = root->fs_info->fs_devices;
493 list_for_each_entry(device, &fs_devices->devices, dev_list)
496 list_sort(NULL, &fs_devices->devices, _cmp_device_by_id);
498 printf("Number of devices: %d\n", number_of_devices);
499 /* printf("Total devices size: %10s\n", */
500 /* pretty_size(total_block_count)); */
501 printf("Devices:\n");
502 printf(" ID SIZE PATH\n");
503 list_for_each_entry(device, &fs_devices->devices, dev_list) {
504 printf(" %3llu %10s %s\n",
506 pretty_size(device->total_bytes),
508 total_block_count += device->total_bytes;
514 static int is_temp_block_group(struct extent_buffer *node,
515 struct btrfs_block_group_item *bgi,
516 u64 data_profile, u64 meta_profile,
519 u64 flag = btrfs_disk_block_group_flags(node, bgi);
520 u64 flag_type = flag & BTRFS_BLOCK_GROUP_TYPE_MASK;
521 u64 flag_profile = flag & BTRFS_BLOCK_GROUP_PROFILE_MASK;
522 u64 used = btrfs_disk_block_group_used(node, bgi);
525 * Chunks meets all the following conditions is a temp chunk
527 * Temp chunk is always empty.
529 * 2) profile mismatch with mkfs profile.
530 * Temp chunk is always in SINGLE
532 * 3) Size differs with mkfs_alloc
533 * Special case for SINGLE/SINGLE btrfs.
534 * In that case, temp data chunk and real data chunk are always empty.
535 * So we need to use mkfs_alloc to be sure which chunk is the newly
538 * Normally, new chunk size is equal to mkfs one (One chunk)
539 * If it has multiple chunks, we just refuse to delete any one.
540 * As they are all single, so no real problem will happen.
541 * So only use condition 1) and 2) to judge them.
546 case BTRFS_BLOCK_GROUP_DATA:
547 case BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA:
548 data_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
549 if (flag_profile != data_profile)
552 case BTRFS_BLOCK_GROUP_METADATA:
553 meta_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
554 if (flag_profile != meta_profile)
557 case BTRFS_BLOCK_GROUP_SYSTEM:
558 sys_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
559 if (flag_profile != sys_profile)
566 /* Note: if current is a block group, it will skip it anyway */
567 static int next_block_group(struct btrfs_root *root,
568 struct btrfs_path *path)
570 struct btrfs_key key;
574 ret = btrfs_next_item(root, path);
578 btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
579 if (key.type == BTRFS_BLOCK_GROUP_ITEM_KEY)
586 /* This function will cleanup */
587 static int cleanup_temp_chunks(struct btrfs_fs_info *fs_info,
588 struct mkfs_allocation *alloc,
589 u64 data_profile, u64 meta_profile,
592 struct btrfs_trans_handle *trans = NULL;
593 struct btrfs_block_group_item *bgi;
594 struct btrfs_root *root = fs_info->extent_root;
595 struct btrfs_key key;
596 struct btrfs_key found_key;
597 struct btrfs_path path;
600 btrfs_init_path(&path);
601 trans = btrfs_start_transaction(root, 1);
602 BUG_ON(IS_ERR(trans));
605 key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
610 * as the rest of the loop may modify the tree, we need to
611 * start a new search each time.
613 ret = btrfs_search_slot(trans, root, &key, &path, 0, 0);
616 /* Don't pollute ret for >0 case */
620 btrfs_item_key_to_cpu(path.nodes[0], &found_key,
622 if (found_key.objectid < key.objectid)
624 if (found_key.type != BTRFS_BLOCK_GROUP_ITEM_KEY) {
625 ret = next_block_group(root, &path);
632 btrfs_item_key_to_cpu(path.nodes[0], &found_key,
636 bgi = btrfs_item_ptr(path.nodes[0], path.slots[0],
637 struct btrfs_block_group_item);
638 if (is_temp_block_group(path.nodes[0], bgi,
639 data_profile, meta_profile,
641 u64 flags = btrfs_disk_block_group_flags(path.nodes[0],
644 ret = btrfs_free_block_group(trans, fs_info,
645 found_key.objectid, found_key.offset);
649 if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
650 BTRFS_BLOCK_GROUP_DATA)
651 alloc->data -= found_key.offset;
652 else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
653 BTRFS_BLOCK_GROUP_METADATA)
654 alloc->metadata -= found_key.offset;
655 else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
656 BTRFS_BLOCK_GROUP_SYSTEM)
657 alloc->system -= found_key.offset;
658 else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
659 (BTRFS_BLOCK_GROUP_METADATA |
660 BTRFS_BLOCK_GROUP_DATA))
661 alloc->mixed -= found_key.offset;
663 btrfs_release_path(&path);
664 key.objectid = found_key.objectid + found_key.offset;
668 btrfs_commit_transaction(trans, root);
669 btrfs_release_path(&path);
674 * Just update chunk allocation info, since --rootdir may allocate new
675 * chunks which is not updated in @allocation structure.
677 static void update_chunk_allocation(struct btrfs_fs_info *fs_info,
678 struct mkfs_allocation *allocation)
680 struct btrfs_block_group_cache *bg_cache;
681 const u64 mixed_flag = BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA;
682 u64 search_start = 0;
684 allocation->mixed = 0;
685 allocation->data = 0;
686 allocation->metadata = 0;
687 allocation->system = 0;
689 bg_cache = btrfs_lookup_first_block_group(fs_info,
693 if ((bg_cache->flags & mixed_flag) == mixed_flag)
694 allocation->mixed += bg_cache->key.offset;
695 else if (bg_cache->flags & BTRFS_BLOCK_GROUP_DATA)
696 allocation->data += bg_cache->key.offset;
697 else if (bg_cache->flags & BTRFS_BLOCK_GROUP_METADATA)
698 allocation->metadata += bg_cache->key.offset;
700 allocation->system += bg_cache->key.offset;
701 search_start = bg_cache->key.objectid + bg_cache->key.offset;
705 int main(int argc, char **argv)
708 struct btrfs_root *root;
709 struct btrfs_fs_info *fs_info;
710 struct btrfs_trans_handle *trans;
713 u64 dev_block_count = 0;
715 u64 metadata_profile = 0;
716 u64 data_profile = 0;
717 u32 nodesize = max_t(u32, sysconf(_SC_PAGESIZE),
718 BTRFS_MKFS_DEFAULT_NODE_SIZE);
719 u32 sectorsize = 4096;
720 u32 stripesize = 4096;
727 int nodesize_forced = 0;
728 int data_profile_opt = 0;
729 int metadata_profile_opt = 0;
732 int force_overwrite = 0;
733 char *source_dir = NULL;
734 bool source_dir_set = false;
735 bool shrink_rootdir = false;
736 u64 source_dir_size = 0;
741 char fs_uuid[BTRFS_UUID_UNPARSED_SIZE] = { 0 };
742 u64 features = BTRFS_MKFS_DEFAULT_FEATURES;
743 struct mkfs_allocation allocation = { 0 };
744 struct btrfs_mkfs_config mkfs_cfg;
748 enum { GETOPT_VAL_SHRINK = 257 };
749 static const struct option long_options[] = {
750 { "alloc-start", required_argument, NULL, 'A'},
751 { "byte-count", required_argument, NULL, 'b' },
752 { "force", no_argument, NULL, 'f' },
753 { "leafsize", required_argument, NULL, 'l' },
754 { "label", required_argument, NULL, 'L'},
755 { "metadata", required_argument, NULL, 'm' },
756 { "mixed", no_argument, NULL, 'M' },
757 { "nodesize", required_argument, NULL, 'n' },
758 { "sectorsize", required_argument, NULL, 's' },
759 { "data", required_argument, NULL, 'd' },
760 { "version", no_argument, NULL, 'V' },
761 { "rootdir", required_argument, NULL, 'r' },
762 { "nodiscard", no_argument, NULL, 'K' },
763 { "features", required_argument, NULL, 'O' },
764 { "uuid", required_argument, NULL, 'U' },
765 { "quiet", 0, NULL, 'q' },
766 { "shrink", no_argument, NULL, GETOPT_VAL_SHRINK },
767 { "help", no_argument, NULL, GETOPT_VAL_HELP },
771 c = getopt_long(argc, argv, "A:b:fl:n:s:m:d:L:O:r:U:VMKq",
777 alloc_start = parse_size(optarg);
783 data_profile = parse_profile(optarg);
784 data_profile_opt = 1;
787 warning("--leafsize is deprecated, use --nodesize");
790 nodesize = parse_size(optarg);
794 label = parse_label(optarg);
797 metadata_profile = parse_profile(optarg);
798 metadata_profile_opt = 1;
804 char *orig = strdup(optarg);
807 tmp = btrfs_parse_fs_features(tmp, &features);
809 error("unrecognized filesystem feature '%s'",
815 if (features & BTRFS_FEATURE_LIST_ALL) {
816 btrfs_list_all_fs_features(0);
822 sectorsize = parse_size(optarg);
825 block_count = parse_size(optarg);
829 printf("mkfs.btrfs, part of %s\n",
834 source_dir_set = true;
837 strncpy(fs_uuid, optarg,
838 BTRFS_UUID_UNPARSED_SIZE - 1);
846 case GETOPT_VAL_SHRINK:
847 shrink_rootdir = true;
849 case GETOPT_VAL_HELP:
851 print_usage(c != GETOPT_VAL_HELP);
856 printf("%s\n", PACKAGE_STRING);
857 printf("See %s for more information.\n\n", PACKAGE_URL);
860 sectorsize = max(sectorsize, (u32)sysconf(_SC_PAGESIZE));
861 stripesize = sectorsize;
862 saved_optind = optind;
863 dev_cnt = argc - optind;
867 if (source_dir_set && dev_cnt > 1) {
868 error("the option -r is limited to a single device");
871 if (shrink_rootdir && !source_dir_set) {
872 error("the option --shrink must be used with --rootdir");
879 if (uuid_parse(fs_uuid, dummy_uuid) != 0) {
880 error("could not parse UUID: %s", fs_uuid);
883 if (!test_uuid_unique(fs_uuid)) {
884 error("non-unique UUID: %s", fs_uuid);
889 while (dev_cnt-- > 0) {
890 file = argv[optind++];
891 if (source_dir_set && is_path_exist(file) == 0)
893 else if (is_block_device(file) == 1)
894 ret = test_dev_for_mkfs(file, force_overwrite);
896 ret = test_status_for_mkfs(file, force_overwrite);
902 optind = saved_optind;
903 dev_cnt = argc - optind;
905 file = argv[optind++];
909 * Set default profiles according to number of added devices.
910 * For mixed groups defaults are single/single.
913 if (!metadata_profile_opt) {
914 if (dev_cnt == 1 && ssd && verbose)
915 printf("Detected a SSD, turning off metadata "
916 "duplication. Mkfs with -m dup if you want to "
917 "force metadata duplication.\n");
919 metadata_profile = (dev_cnt > 1) ?
920 BTRFS_BLOCK_GROUP_RAID1 : (ssd) ?
921 0: BTRFS_BLOCK_GROUP_DUP;
923 if (!data_profile_opt) {
924 data_profile = (dev_cnt > 1) ?
925 BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */
928 u32 best_nodesize = max_t(u32, sysconf(_SC_PAGESIZE), sectorsize);
930 if (metadata_profile_opt || data_profile_opt) {
931 if (metadata_profile != data_profile) {
933 "with mixed block groups data and metadata profiles must be the same");
938 if (!nodesize_forced)
939 nodesize = best_nodesize;
943 * FS features that can be set by other means than -O
944 * just set the bit here
947 features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
949 if ((data_profile | metadata_profile) &
950 (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
951 features |= BTRFS_FEATURE_INCOMPAT_RAID56;
954 if (btrfs_check_nodesize(nodesize, sectorsize,
958 if (sectorsize < sizeof(struct btrfs_super_block)) {
959 error("sectorsize smaller than superblock: %u < %zu",
960 sectorsize, sizeof(struct btrfs_super_block));
964 min_dev_size = btrfs_min_dev_size(nodesize, mixed, metadata_profile,
967 * Enlarge the destination file or create a new one, using the size
968 * calculated from source dir.
970 * This must be done before minimal device size checks.
972 if (source_dir_set) {
973 fd = open(file, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR | S_IRGRP |
976 error("unable to open %s: %s", file, strerror(errno));
980 source_dir_size = btrfs_mkfs_size_dir(source_dir, sectorsize,
981 min_dev_size, metadata_profile, data_profile);
982 if (block_count < source_dir_size)
983 block_count = source_dir_size;
984 ret = zero_output_file(fd, block_count);
986 error("unable to zero the output file");
990 /* our "device" is the new image file */
991 dev_block_count = block_count;
994 /* Check device/block_count after the nodesize is determined */
995 if (block_count && block_count < min_dev_size) {
996 error("size %llu is too small to make a usable filesystem",
998 error("minimum size for btrfs filesystem is %llu",
1002 for (i = saved_optind; i < saved_optind + dev_cnt; i++) {
1006 ret = test_minimum_size(path, min_dev_size);
1008 error("failed to check size for %s: %s",
1009 path, strerror(-ret));
1013 error("'%s' is too small to make a usable filesystem",
1015 error("minimum size for each btrfs device is %llu",
1020 ret = test_num_disk_vs_raid(metadata_profile, data_profile,
1021 dev_cnt, mixed, ssd);
1028 * Open without O_EXCL so that the problem should not occur by the
1029 * following operation in kernel:
1030 * (btrfs_register_one_device() fails if O_EXCL is on)
1032 fd = open(file, O_RDWR);
1034 error("unable to open %s: %s", file, strerror(errno));
1037 ret = btrfs_prepare_device(fd, file, &dev_block_count, block_count,
1038 (zero_end ? PREP_DEVICE_ZERO_END : 0) |
1039 (discard ? PREP_DEVICE_DISCARD : 0) |
1040 (verbose ? PREP_DEVICE_VERBOSE : 0));
1043 if (block_count && block_count > dev_block_count) {
1044 error("%s is smaller than requested size, expected %llu, found %llu",
1045 file, (unsigned long long)block_count,
1046 (unsigned long long)dev_block_count);
1050 /* To create the first block group and chunk 0 in make_btrfs */
1051 if (dev_block_count < BTRFS_MKFS_SYSTEM_GROUP_SIZE) {
1052 error("device is too small to make filesystem, must be at least %llu",
1053 (unsigned long long)BTRFS_MKFS_SYSTEM_GROUP_SIZE);
1057 if (group_profile_max_safe_loss(metadata_profile) <
1058 group_profile_max_safe_loss(data_profile)){
1059 warning("metadata has lower redundancy than data!\n");
1062 mkfs_cfg.label = label;
1063 memcpy(mkfs_cfg.fs_uuid, fs_uuid, sizeof(mkfs_cfg.fs_uuid));
1064 mkfs_cfg.num_bytes = dev_block_count;
1065 mkfs_cfg.nodesize = nodesize;
1066 mkfs_cfg.sectorsize = sectorsize;
1067 mkfs_cfg.stripesize = stripesize;
1068 mkfs_cfg.features = features;
1070 ret = make_btrfs(fd, &mkfs_cfg);
1072 error("error during mkfs: %s", strerror(-ret));
1076 fs_info = open_ctree_fs_info(file, 0, 0, 0,
1077 OPEN_CTREE_WRITES | OPEN_CTREE_FS_PARTIAL);
1079 error("open ctree failed");
1084 root = fs_info->fs_root;
1085 fs_info->alloc_start = alloc_start;
1087 ret = create_metadata_block_groups(root, mixed, &allocation);
1089 error("failed to create default block groups: %d", ret);
1093 trans = btrfs_start_transaction(root, 1);
1094 if (IS_ERR(trans)) {
1095 error("failed to start transaction");
1099 ret = create_data_block_groups(trans, root, mixed, &allocation);
1101 error("failed to create default data block groups: %d", ret);
1105 ret = make_root_dir(trans, root);
1107 error("failed to setup the root directory: %d", ret);
1111 ret = btrfs_commit_transaction(trans, root);
1113 error("unable to commit transaction: %d", ret);
1117 trans = btrfs_start_transaction(root, 1);
1118 if (IS_ERR(trans)) {
1119 error("failed to start transaction");
1126 while (dev_cnt-- > 0) {
1127 file = argv[optind++];
1130 * open without O_EXCL so that the problem should not
1131 * occur by the following processing.
1132 * (btrfs_register_one_device() fails if O_EXCL is on)
1134 fd = open(file, O_RDWR);
1136 error("unable to open %s: %s", file, strerror(errno));
1139 ret = btrfs_device_already_in_root(root, fd,
1140 BTRFS_SUPER_INFO_OFFSET);
1142 error("skipping duplicate device %s in the filesystem",
1147 ret = btrfs_prepare_device(fd, file, &dev_block_count,
1149 (verbose ? PREP_DEVICE_VERBOSE : 0) |
1150 (zero_end ? PREP_DEVICE_ZERO_END : 0) |
1151 (discard ? PREP_DEVICE_DISCARD : 0));
1156 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
1157 sectorsize, sectorsize, sectorsize);
1159 error("unable to add %s to filesystem: %d", file, ret);
1163 struct btrfs_device *device;
1165 device = container_of(fs_info->fs_devices->devices.next,
1166 struct btrfs_device, dev_list);
1167 printf("adding device %s id %llu\n", file,
1168 (unsigned long long)device->devid);
1173 ret = create_raid_groups(trans, root, data_profile,
1174 metadata_profile, mixed, &allocation);
1176 error("unable to create raid groups: %d", ret);
1180 ret = create_tree(trans, root, BTRFS_DATA_RELOC_TREE_OBJECTID);
1182 error("unable to create data reloc tree: %d", ret);
1186 ret = btrfs_commit_transaction(trans, root);
1188 error("unable to commit transaction: %d", ret);
1192 ret = cleanup_temp_chunks(fs_info, &allocation, data_profile,
1193 metadata_profile, metadata_profile);
1195 error("failed to cleanup temporary chunks: %d", ret);
1199 if (source_dir_set) {
1200 ret = btrfs_mkfs_fill_dir(source_dir, root, verbose);
1202 error("error wihle filling filesystem: %d", ret);
1205 if (shrink_rootdir) {
1206 ret = btrfs_mkfs_shrink_fs(fs_info, &shrink_size,
1209 error("error while shrinking filesystem: %d",
1217 char features_buf[64];
1219 update_chunk_allocation(fs_info, &allocation);
1220 printf("Label: %s\n", label);
1221 printf("UUID: %s\n", mkfs_cfg.fs_uuid);
1222 printf("Node size: %u\n", nodesize);
1223 printf("Sector size: %u\n", sectorsize);
1224 printf("Filesystem size: %s\n",
1225 pretty_size(btrfs_super_total_bytes(fs_info->super_copy)));
1226 printf("Block group profiles:\n");
1227 if (allocation.data)
1228 printf(" Data: %-8s %16s\n",
1229 btrfs_group_profile_str(data_profile),
1230 pretty_size(allocation.data));
1231 if (allocation.metadata)
1232 printf(" Metadata: %-8s %16s\n",
1233 btrfs_group_profile_str(metadata_profile),
1234 pretty_size(allocation.metadata));
1235 if (allocation.mixed)
1236 printf(" Data+Metadata: %-8s %16s\n",
1237 btrfs_group_profile_str(data_profile),
1238 pretty_size(allocation.mixed));
1239 printf(" System: %-8s %16s\n",
1240 btrfs_group_profile_str(metadata_profile),
1241 pretty_size(allocation.system));
1242 printf("SSD detected: %s\n", ssd ? "yes" : "no");
1243 btrfs_parse_features_to_string(features_buf, features);
1244 printf("Incompat features: %s", features_buf);
1247 list_all_devices(root);
1251 * The filesystem is now fully set up, commit the remaining changes and
1252 * fix the signature as the last step before closing the devices.
1254 fs_info->finalize_on_close = 1;
1256 close_ret = close_ctree(root);
1259 optind = saved_optind;
1260 dev_cnt = argc - optind;
1261 while (dev_cnt-- > 0) {
1262 file = argv[optind++];
1263 if (is_block_device(file) == 1)
1264 btrfs_register_one_device(file);
1268 btrfs_close_all_devices();