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);
720 int main(int argc, char **argv)
723 struct btrfs_root *root;
724 struct btrfs_fs_info *fs_info;
725 struct btrfs_trans_handle *trans;
728 u64 dev_block_count = 0;
730 u64 metadata_profile = 0;
731 u64 data_profile = 0;
732 u32 nodesize = max_t(u32, sysconf(_SC_PAGESIZE),
733 BTRFS_MKFS_DEFAULT_NODE_SIZE);
734 u32 sectorsize = 4096;
735 u32 stripesize = 4096;
742 int nodesize_forced = 0;
743 int data_profile_opt = 0;
744 int metadata_profile_opt = 0;
747 int force_overwrite = 0;
748 char *source_dir = NULL;
749 int source_dir_set = 0;
750 u64 num_of_meta_chunks = 0;
751 u64 size_of_data = 0;
752 u64 source_dir_size = 0;
756 char fs_uuid[BTRFS_UUID_UNPARSED_SIZE] = { 0 };
757 u64 features = BTRFS_MKFS_DEFAULT_FEATURES;
758 struct mkfs_allocation allocation = { 0 };
759 struct btrfs_mkfs_config mkfs_cfg;
763 static const struct option long_options[] = {
764 { "alloc-start", required_argument, NULL, 'A'},
765 { "byte-count", required_argument, NULL, 'b' },
766 { "force", no_argument, NULL, 'f' },
767 { "leafsize", required_argument, NULL, 'l' },
768 { "label", required_argument, NULL, 'L'},
769 { "metadata", required_argument, NULL, 'm' },
770 { "mixed", no_argument, NULL, 'M' },
771 { "nodesize", required_argument, NULL, 'n' },
772 { "sectorsize", required_argument, NULL, 's' },
773 { "data", required_argument, NULL, 'd' },
774 { "version", no_argument, NULL, 'V' },
775 { "rootdir", required_argument, NULL, 'r' },
776 { "nodiscard", no_argument, NULL, 'K' },
777 { "features", required_argument, NULL, 'O' },
778 { "uuid", required_argument, NULL, 'U' },
779 { "quiet", 0, NULL, 'q' },
780 { "help", no_argument, NULL, GETOPT_VAL_HELP },
784 c = getopt_long(argc, argv, "A:b:fl:n:s:m:d:L:O:r:U:VMKq",
790 alloc_start = parse_size(optarg);
796 data_profile = parse_profile(optarg);
797 data_profile_opt = 1;
800 warning("--leafsize is deprecated, use --nodesize");
803 nodesize = parse_size(optarg);
807 label = parse_label(optarg);
810 metadata_profile = parse_profile(optarg);
811 metadata_profile_opt = 1;
817 char *orig = strdup(optarg);
820 tmp = btrfs_parse_fs_features(tmp, &features);
822 error("unrecognized filesystem feature '%s'",
828 if (features & BTRFS_FEATURE_LIST_ALL) {
829 btrfs_list_all_fs_features(0);
835 sectorsize = parse_size(optarg);
838 block_count = parse_size(optarg);
842 printf("mkfs.btrfs, part of %s\n",
850 strncpy(fs_uuid, optarg,
851 BTRFS_UUID_UNPARSED_SIZE - 1);
859 case GETOPT_VAL_HELP:
861 print_usage(c != GETOPT_VAL_HELP);
866 printf("%s\n", PACKAGE_STRING);
867 printf("See %s for more information.\n\n", PACKAGE_URL);
870 sectorsize = max(sectorsize, (u32)sysconf(_SC_PAGESIZE));
871 stripesize = sectorsize;
872 saved_optind = optind;
873 dev_cnt = argc - optind;
877 if (source_dir_set && dev_cnt > 1) {
878 error("the option -r is limited to a single device");
885 if (uuid_parse(fs_uuid, dummy_uuid) != 0) {
886 error("could not parse UUID: %s", fs_uuid);
889 if (!test_uuid_unique(fs_uuid)) {
890 error("non-unique UUID: %s", fs_uuid);
895 while (dev_cnt-- > 0) {
896 file = argv[optind++];
897 if (is_block_device(file) == 1)
898 ret = test_dev_for_mkfs(file, force_overwrite);
900 ret = test_status_for_mkfs(file, force_overwrite);
906 optind = saved_optind;
907 dev_cnt = argc - optind;
909 file = argv[optind++];
913 * Set default profiles according to number of added devices.
914 * For mixed groups defaults are single/single.
917 if (!metadata_profile_opt) {
918 if (dev_cnt == 1 && ssd && verbose)
919 printf("Detected a SSD, turning off metadata "
920 "duplication. Mkfs with -m dup if you want to "
921 "force metadata duplication.\n");
923 metadata_profile = (dev_cnt > 1) ?
924 BTRFS_BLOCK_GROUP_RAID1 : (ssd) ?
925 0: BTRFS_BLOCK_GROUP_DUP;
927 if (!data_profile_opt) {
928 data_profile = (dev_cnt > 1) ?
929 BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */
932 u32 best_nodesize = max_t(u32, sysconf(_SC_PAGESIZE), sectorsize);
934 if (metadata_profile_opt || data_profile_opt) {
935 if (metadata_profile != data_profile) {
937 "with mixed block groups data and metadata profiles must be the same");
942 if (!nodesize_forced)
943 nodesize = best_nodesize;
947 * FS features that can be set by other means than -O
948 * just set the bit here
951 features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
953 if ((data_profile | metadata_profile) &
954 (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
955 features |= BTRFS_FEATURE_INCOMPAT_RAID56;
958 if (btrfs_check_nodesize(nodesize, sectorsize,
962 if (sectorsize < sizeof(struct btrfs_super_block)) {
963 error("sectorsize smaller than superblock: %u < %zu",
964 sectorsize, sizeof(struct btrfs_super_block));
968 min_dev_size = btrfs_min_dev_size(nodesize, mixed, metadata_profile,
970 /* Check device/block_count after the nodesize is determined */
971 if (block_count && block_count < min_dev_size) {
972 error("size %llu is too small to make a usable filesystem",
974 error("minimum size for btrfs filesystem is %llu",
978 for (i = saved_optind; i < saved_optind + dev_cnt; i++) {
982 ret = test_minimum_size(path, min_dev_size);
984 error("failed to check size for %s: %s",
985 path, strerror(-ret));
989 error("'%s' is too small to make a usable filesystem",
991 error("minimum size for each btrfs device is %llu",
996 ret = test_num_disk_vs_raid(metadata_profile, data_profile,
997 dev_cnt, mixed, ssd);
1003 if (!source_dir_set) {
1005 * open without O_EXCL so that the problem should not
1006 * occur by the following processing.
1007 * (btrfs_register_one_device() fails if O_EXCL is on)
1009 fd = open(file, O_RDWR);
1011 error("unable to open %s: %s", file, strerror(errno));
1014 ret = btrfs_prepare_device(fd, file, &dev_block_count,
1016 (zero_end ? PREP_DEVICE_ZERO_END : 0) |
1017 (discard ? PREP_DEVICE_DISCARD : 0) |
1018 (verbose ? PREP_DEVICE_VERBOSE : 0));
1022 if (block_count && block_count > dev_block_count) {
1023 error("%s is smaller than requested size, expected %llu, found %llu",
1025 (unsigned long long)block_count,
1026 (unsigned long long)dev_block_count);
1030 fd = open(file, O_CREAT | O_RDWR,
1031 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
1033 error("unable to open %s: %s", file, strerror(errno));
1037 source_dir_size = btrfs_mkfs_size_dir(source_dir, sectorsize,
1038 &num_of_meta_chunks, &size_of_data);
1039 if(block_count < source_dir_size)
1040 block_count = source_dir_size;
1041 ret = zero_output_file(fd, block_count);
1043 error("unable to zero the output file");
1046 /* our "device" is the new image file */
1047 dev_block_count = 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 if (!source_dir_set) {
1174 ret = create_raid_groups(trans, root, data_profile,
1175 metadata_profile, mixed, &allocation);
1177 error("unable to create raid groups: %d", ret);
1182 ret = create_tree(trans, root, BTRFS_DATA_RELOC_TREE_OBJECTID);
1184 error("unable to create data reloc tree: %d", ret);
1188 ret = btrfs_commit_transaction(trans, root);
1190 error("unable to commit transaction: %d", ret);
1194 if (source_dir_set) {
1195 trans = btrfs_start_transaction(root, 1);
1196 BUG_ON(IS_ERR(trans));
1197 ret = create_chunks(trans, root,
1198 num_of_meta_chunks, size_of_data,
1201 error("unable to create chunks: %d", ret);
1204 ret = btrfs_commit_transaction(trans, root);
1206 error("transaction commit failed: %d", ret);
1210 ret = btrfs_mkfs_fill_dir(source_dir, root, verbose);
1212 error("error wihle filling filesystem: %d", ret);
1216 ret = cleanup_temp_chunks(fs_info, &allocation, data_profile,
1217 metadata_profile, metadata_profile);
1219 error("failed to cleanup temporary chunks: %d", ret);
1224 char features_buf[64];
1226 printf("Label: %s\n", label);
1227 printf("UUID: %s\n", mkfs_cfg.fs_uuid);
1228 printf("Node size: %u\n", nodesize);
1229 printf("Sector size: %u\n", sectorsize);
1230 printf("Filesystem size: %s\n",
1231 pretty_size(btrfs_super_total_bytes(fs_info->super_copy)));
1232 printf("Block group profiles:\n");
1233 if (allocation.data)
1234 printf(" Data: %-8s %16s\n",
1235 btrfs_group_profile_str(data_profile),
1236 pretty_size(allocation.data));
1237 if (allocation.metadata)
1238 printf(" Metadata: %-8s %16s\n",
1239 btrfs_group_profile_str(metadata_profile),
1240 pretty_size(allocation.metadata));
1241 if (allocation.mixed)
1242 printf(" Data+Metadata: %-8s %16s\n",
1243 btrfs_group_profile_str(data_profile),
1244 pretty_size(allocation.mixed));
1245 printf(" System: %-8s %16s\n",
1246 btrfs_group_profile_str(metadata_profile),
1247 pretty_size(allocation.system));
1248 printf("SSD detected: %s\n", ssd ? "yes" : "no");
1249 btrfs_parse_features_to_string(features_buf, features);
1250 printf("Incompat features: %s", features_buf);
1253 list_all_devices(root);
1257 * The filesystem is now fully set up, commit the remaining changes and
1258 * fix the signature as the last step before closing the devices.
1260 fs_info->finalize_on_close = 1;
1262 close_ret = close_ctree(root);
1265 optind = saved_optind;
1266 dev_cnt = argc - optind;
1267 while (dev_cnt-- > 0) {
1268 file = argv[optind++];
1269 if (is_block_device(file) == 1)
1270 btrfs_register_one_device(file);
1274 btrfs_close_all_devices();