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 #define _XOPEN_SOURCE 500
22 #include "kerncompat.h"
24 #include <sys/ioctl.h>
25 #include <sys/mount.h>
29 #include <sys/types.h>
35 #include <uuid/uuid.h>
37 #include <attr/xattr.h>
38 #include <blkid/blkid.h>
43 #include "transaction.h"
47 static u64 index_cnt = 2;
49 struct directory_name_entry {
53 struct list_head list;
56 static int make_root_dir(struct btrfs_root *root, int mixed)
58 struct btrfs_trans_handle *trans;
59 struct btrfs_key location;
65 trans = btrfs_start_transaction(root, 1);
66 bytes_used = btrfs_super_bytes_used(root->fs_info->super_copy);
68 root->fs_info->system_allocs = 1;
69 ret = btrfs_make_block_group(trans, root, bytes_used,
70 BTRFS_BLOCK_GROUP_SYSTEM,
71 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
72 0, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
76 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
77 &chunk_start, &chunk_size,
78 BTRFS_BLOCK_GROUP_METADATA |
79 BTRFS_BLOCK_GROUP_DATA);
82 "no space to alloc data/metadata chunk\n");
86 ret = btrfs_make_block_group(trans, root, 0,
87 BTRFS_BLOCK_GROUP_METADATA |
88 BTRFS_BLOCK_GROUP_DATA,
89 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
90 chunk_start, chunk_size);
92 printf("Created a data/metadata chunk of size %llu\n", chunk_size);
94 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
95 &chunk_start, &chunk_size,
96 BTRFS_BLOCK_GROUP_METADATA);
98 fprintf(stderr, "no space to alloc metadata chunk\n");
102 ret = btrfs_make_block_group(trans, root, 0,
103 BTRFS_BLOCK_GROUP_METADATA,
104 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
105 chunk_start, chunk_size);
109 root->fs_info->system_allocs = 0;
110 btrfs_commit_transaction(trans, root);
111 trans = btrfs_start_transaction(root, 1);
115 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
116 &chunk_start, &chunk_size,
117 BTRFS_BLOCK_GROUP_DATA);
118 if (ret == -ENOSPC) {
119 fprintf(stderr, "no space to alloc data chunk\n");
123 ret = btrfs_make_block_group(trans, root, 0,
124 BTRFS_BLOCK_GROUP_DATA,
125 BTRFS_FIRST_CHUNK_TREE_OBJECTID,
126 chunk_start, chunk_size);
130 ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
131 BTRFS_ROOT_TREE_DIR_OBJECTID);
134 ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
137 memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
138 location.offset = (u64)-1;
139 ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
141 btrfs_super_root_dir(root->fs_info->super_copy),
142 &location, BTRFS_FT_DIR, 0);
146 ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
147 "default", 7, location.objectid,
148 BTRFS_ROOT_TREE_DIR_OBJECTID, 0);
152 btrfs_commit_transaction(trans, root);
157 static void __recow_root(struct btrfs_trans_handle *trans,
158 struct btrfs_root *root)
161 struct extent_buffer *tmp;
163 if (trans->transid != btrfs_root_generation(&root->root_item)) {
164 ret = __btrfs_cow_block(trans, root, root->node,
165 NULL, 0, &tmp, 0, 0);
167 free_extent_buffer(tmp);
171 static void recow_roots(struct btrfs_trans_handle *trans,
172 struct btrfs_root *root)
174 struct btrfs_fs_info *info = root->fs_info;
176 __recow_root(trans, info->fs_root);
177 __recow_root(trans, info->tree_root);
178 __recow_root(trans, info->extent_root);
179 __recow_root(trans, info->chunk_root);
180 __recow_root(trans, info->dev_root);
181 __recow_root(trans, info->csum_root);
184 static int create_one_raid_group(struct btrfs_trans_handle *trans,
185 struct btrfs_root *root, u64 type)
191 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
192 &chunk_start, &chunk_size, type);
193 if (ret == -ENOSPC) {
194 fprintf(stderr, "not enough free space\n");
198 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
199 type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
200 chunk_start, chunk_size);
205 static int create_raid_groups(struct btrfs_trans_handle *trans,
206 struct btrfs_root *root, u64 data_profile,
207 int data_profile_opt, u64 metadata_profile,
208 int metadata_profile_opt, int mixed, int ssd)
210 u64 num_devices = btrfs_super_num_devices(root->fs_info->super_copy);
213 if (metadata_profile) {
214 u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA;
216 ret = create_one_raid_group(trans, root,
217 BTRFS_BLOCK_GROUP_SYSTEM |
222 meta_flags |= BTRFS_BLOCK_GROUP_DATA;
224 ret = create_one_raid_group(trans, root, meta_flags |
229 if (!mixed && num_devices > 1 && data_profile) {
230 ret = create_one_raid_group(trans, root,
231 BTRFS_BLOCK_GROUP_DATA |
235 recow_roots(trans, root);
240 static int create_data_reloc_tree(struct btrfs_trans_handle *trans,
241 struct btrfs_root *root)
243 struct btrfs_key location;
244 struct btrfs_root_item root_item;
245 struct extent_buffer *tmp;
246 u64 objectid = BTRFS_DATA_RELOC_TREE_OBJECTID;
249 ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
252 memcpy(&root_item, &root->root_item, sizeof(root_item));
253 btrfs_set_root_bytenr(&root_item, tmp->start);
254 btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
255 btrfs_set_root_generation(&root_item, trans->transid);
256 free_extent_buffer(tmp);
258 location.objectid = objectid;
259 location.type = BTRFS_ROOT_ITEM_KEY;
261 ret = btrfs_insert_root(trans, root->fs_info->tree_root,
262 &location, &root_item);
268 static void print_usage(void) __attribute__((noreturn));
269 static void print_usage(void)
271 fprintf(stderr, "usage: mkfs.btrfs [options] dev [ dev ... ]\n");
272 fprintf(stderr, "options:\n");
273 fprintf(stderr, "\t -A --alloc-start the offset to start the FS\n");
274 fprintf(stderr, "\t -b --byte-count total number of bytes in the FS\n");
275 fprintf(stderr, "\t -d --data data profile, raid0, raid1, raid5, raid6, raid10, dup or single\n");
276 fprintf(stderr, "\t -f --force force overwrite of existing filesystem\n");
277 fprintf(stderr, "\t -l --leafsize size of btree leaves\n");
278 fprintf(stderr, "\t -L --label set a label\n");
279 fprintf(stderr, "\t -m --metadata metadata profile, values like data profile\n");
280 fprintf(stderr, "\t -M --mixed mix metadata and data together\n");
281 fprintf(stderr, "\t -n --nodesize size of btree nodes\n");
282 fprintf(stderr, "\t -s --sectorsize min block allocation (may not mountable by current kernel)\n");
283 fprintf(stderr, "\t -r --rootdir the source directory\n");
284 fprintf(stderr, "\t -K --nodiscard do not perform whole device TRIM\n");
285 fprintf(stderr, "\t -O --features comma separated list of filesystem features\n");
286 fprintf(stderr, "\t -V --version print the mkfs.btrfs version and exit\n");
287 fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
291 static void print_version(void) __attribute__((noreturn));
292 static void print_version(void)
294 fprintf(stderr, "mkfs.btrfs, part of %s\n", BTRFS_BUILD_VERSION);
298 static u64 parse_profile(char *s)
300 if (strcmp(s, "raid0") == 0) {
301 return BTRFS_BLOCK_GROUP_RAID0;
302 } else if (strcmp(s, "raid1") == 0) {
303 return BTRFS_BLOCK_GROUP_RAID1;
304 } else if (strcmp(s, "raid5") == 0) {
305 return BTRFS_BLOCK_GROUP_RAID5;
306 } else if (strcmp(s, "raid6") == 0) {
307 return BTRFS_BLOCK_GROUP_RAID6;
308 } else if (strcmp(s, "raid10") == 0) {
309 return BTRFS_BLOCK_GROUP_RAID10;
310 } else if (strcmp(s, "dup") == 0) {
311 return BTRFS_BLOCK_GROUP_DUP;
312 } else if (strcmp(s, "single") == 0) {
315 fprintf(stderr, "Unknown profile %s\n", s);
322 static char *parse_label(char *input)
324 int len = strlen(input);
326 if (len >= BTRFS_LABEL_SIZE) {
327 fprintf(stderr, "Label %s is too long (max %d)\n", input,
328 BTRFS_LABEL_SIZE - 1);
331 return strdup(input);
334 static struct option long_options[] = {
335 { "alloc-start", 1, NULL, 'A'},
336 { "byte-count", 1, NULL, 'b' },
337 { "force", 0, NULL, 'f' },
338 { "leafsize", 1, NULL, 'l' },
339 { "label", 1, NULL, 'L'},
340 { "metadata", 1, NULL, 'm' },
341 { "mixed", 0, NULL, 'M' },
342 { "nodesize", 1, NULL, 'n' },
343 { "sectorsize", 1, NULL, 's' },
344 { "data", 1, NULL, 'd' },
345 { "version", 0, NULL, 'V' },
346 { "rootdir", 1, NULL, 'r' },
347 { "nodiscard", 0, NULL, 'K' },
348 { "features", 0, NULL, 'O' },
352 static int add_directory_items(struct btrfs_trans_handle *trans,
353 struct btrfs_root *root, u64 objectid,
354 ino_t parent_inum, const char *name,
355 struct stat *st, int *dir_index_cnt)
359 struct btrfs_key location;
362 name_len = strlen(name);
364 location.objectid = objectid;
366 btrfs_set_key_type(&location, BTRFS_INODE_ITEM_KEY);
368 if (S_ISDIR(st->st_mode))
369 filetype = BTRFS_FT_DIR;
370 if (S_ISREG(st->st_mode))
371 filetype = BTRFS_FT_REG_FILE;
372 if (S_ISLNK(st->st_mode))
373 filetype = BTRFS_FT_SYMLINK;
375 ret = btrfs_insert_dir_item(trans, root, name, name_len,
376 parent_inum, &location,
377 filetype, index_cnt);
379 *dir_index_cnt = index_cnt;
385 static int fill_inode_item(struct btrfs_trans_handle *trans,
386 struct btrfs_root *root,
387 struct btrfs_inode_item *dst, struct stat *src)
390 u64 sectorsize = root->sectorsize;
393 * btrfs_inode_item has some reserved fields
394 * and represents on-disk inode entry, so
395 * zero everything to prevent information leak
397 memset(dst, 0, sizeof (*dst));
399 btrfs_set_stack_inode_generation(dst, trans->transid);
400 btrfs_set_stack_inode_size(dst, src->st_size);
401 btrfs_set_stack_inode_nbytes(dst, 0);
402 btrfs_set_stack_inode_block_group(dst, 0);
403 btrfs_set_stack_inode_nlink(dst, src->st_nlink);
404 btrfs_set_stack_inode_uid(dst, src->st_uid);
405 btrfs_set_stack_inode_gid(dst, src->st_gid);
406 btrfs_set_stack_inode_mode(dst, src->st_mode);
407 btrfs_set_stack_inode_rdev(dst, 0);
408 btrfs_set_stack_inode_flags(dst, 0);
409 btrfs_set_stack_timespec_sec(&dst->atime, src->st_atime);
410 btrfs_set_stack_timespec_nsec(&dst->atime, 0);
411 btrfs_set_stack_timespec_sec(&dst->ctime, src->st_ctime);
412 btrfs_set_stack_timespec_nsec(&dst->ctime, 0);
413 btrfs_set_stack_timespec_sec(&dst->mtime, src->st_mtime);
414 btrfs_set_stack_timespec_nsec(&dst->mtime, 0);
415 btrfs_set_stack_timespec_sec(&dst->otime, 0);
416 btrfs_set_stack_timespec_nsec(&dst->otime, 0);
418 if (S_ISDIR(src->st_mode)) {
419 btrfs_set_stack_inode_size(dst, 0);
420 btrfs_set_stack_inode_nlink(dst, 1);
422 if (S_ISREG(src->st_mode)) {
423 btrfs_set_stack_inode_size(dst, (u64)src->st_size);
424 if (src->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root))
425 btrfs_set_stack_inode_nbytes(dst, src->st_size);
427 blocks = src->st_size / sectorsize;
428 if (src->st_size % sectorsize)
430 blocks *= sectorsize;
431 btrfs_set_stack_inode_nbytes(dst, blocks);
434 if (S_ISLNK(src->st_mode))
435 btrfs_set_stack_inode_nbytes(dst, src->st_size + 1);
440 static int directory_select(const struct direct *entry)
442 if ((strncmp(entry->d_name, ".", entry->d_reclen) == 0) ||
443 (strncmp(entry->d_name, "..", entry->d_reclen) == 0))
449 static void free_namelist(struct direct **files, int count)
456 for (i = 0; i < count; ++i)
461 static u64 calculate_dir_inode_size(char *dirname)
464 struct direct **files, *cur_file;
465 u64 dir_inode_size = 0;
467 count = scandir(dirname, &files, directory_select, NULL);
469 for (i = 0; i < count; i++) {
471 dir_inode_size += strlen(cur_file->d_name);
474 free_namelist(files, count);
477 return dir_inode_size;
480 static int add_inode_items(struct btrfs_trans_handle *trans,
481 struct btrfs_root *root,
482 struct stat *st, char *name,
483 u64 self_objectid, ino_t parent_inum,
484 int dir_index_cnt, struct btrfs_inode_item *inode_ret)
487 struct btrfs_key inode_key;
488 struct btrfs_inode_item btrfs_inode;
493 name_len = strlen(name);
494 fill_inode_item(trans, root, &btrfs_inode, st);
495 objectid = self_objectid;
497 if (S_ISDIR(st->st_mode)) {
498 inode_size = calculate_dir_inode_size(name);
499 btrfs_set_stack_inode_size(&btrfs_inode, inode_size);
502 inode_key.objectid = objectid;
503 inode_key.offset = 0;
504 btrfs_set_key_type(&inode_key, BTRFS_INODE_ITEM_KEY);
506 ret = btrfs_insert_inode(trans, root, objectid, &btrfs_inode);
510 ret = btrfs_insert_inode_ref(trans, root, name, name_len,
511 objectid, parent_inum, dir_index_cnt);
515 *inode_ret = btrfs_inode;
520 static int add_xattr_item(struct btrfs_trans_handle *trans,
521 struct btrfs_root *root, u64 objectid,
522 const char *file_name)
526 char xattr_list[XATTR_LIST_MAX];
528 char cur_value[XATTR_SIZE_MAX];
529 char delimiter = '\0';
530 char *next_location = xattr_list;
532 ret = llistxattr(file_name, xattr_list, XATTR_LIST_MAX);
536 fprintf(stderr, "get a list of xattr failed for %s\n",
543 cur_name = strtok(xattr_list, &delimiter);
544 while (cur_name != NULL) {
545 cur_name_len = strlen(cur_name);
546 next_location += cur_name_len + 1;
548 ret = getxattr(file_name, cur_name, cur_value, XATTR_SIZE_MAX);
552 fprintf(stderr, "get a xattr value failed for %s attr %s\n",
553 file_name, cur_name);
557 ret = btrfs_insert_xattr_item(trans, root, cur_name,
558 cur_name_len, cur_value,
561 fprintf(stderr, "insert a xattr item failed for %s\n",
565 cur_name = strtok(next_location, &delimiter);
570 static int custom_alloc_extent(struct btrfs_root *root, u64 num_bytes,
571 u64 hint_byte, struct btrfs_key *ins)
575 u64 last = hint_byte;
578 struct btrfs_block_group_cache *cache;
581 ret = find_first_extent_bit(&root->fs_info->free_space_cache,
582 last, &start, &end, EXTENT_DIRTY);
584 if (wrapped++ == 0) {
592 start = max(last, start);
594 if (last - start < num_bytes)
597 last = start + num_bytes;
598 if (test_range_bit(&root->fs_info->pinned_extents,
599 start, last - 1, EXTENT_DIRTY, 0))
602 cache = btrfs_lookup_block_group(root->fs_info, start);
604 if (cache->flags & BTRFS_BLOCK_GROUP_SYSTEM ||
605 last > cache->key.objectid + cache->key.offset) {
606 last = cache->key.objectid + cache->key.offset;
610 if (cache->flags & (BTRFS_BLOCK_GROUP_SYSTEM |
611 BTRFS_BLOCK_GROUP_METADATA)) {
612 last = cache->key.objectid + cache->key.offset;
616 clear_extent_dirty(&root->fs_info->free_space_cache,
617 start, start + num_bytes - 1, 0);
619 ins->objectid = start;
620 ins->offset = num_bytes;
621 ins->type = BTRFS_EXTENT_ITEM_KEY;
625 fprintf(stderr, "not enough free space\n");
629 static int record_file_extent(struct btrfs_trans_handle *trans,
630 struct btrfs_root *root, u64 objectid,
631 struct btrfs_inode_item *inode,
632 u64 file_pos, u64 disk_bytenr,
636 struct btrfs_fs_info *info = root->fs_info;
637 struct btrfs_root *extent_root = info->extent_root;
638 struct extent_buffer *leaf;
639 struct btrfs_file_extent_item *fi;
640 struct btrfs_key ins_key;
641 struct btrfs_path path;
642 struct btrfs_extent_item *ei;
644 btrfs_init_path(&path);
646 ins_key.objectid = objectid;
648 btrfs_set_key_type(&ins_key, BTRFS_EXTENT_DATA_KEY);
649 ret = btrfs_insert_empty_item(trans, root, &path, &ins_key,
653 leaf = path.nodes[0];
654 fi = btrfs_item_ptr(leaf, path.slots[0],
655 struct btrfs_file_extent_item);
656 btrfs_set_file_extent_generation(leaf, fi, trans->transid);
657 btrfs_set_file_extent_type(leaf, fi, BTRFS_FILE_EXTENT_REG);
658 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
659 btrfs_set_file_extent_disk_num_bytes(leaf, fi, num_bytes);
660 btrfs_set_file_extent_offset(leaf, fi, 0);
661 btrfs_set_file_extent_num_bytes(leaf, fi, num_bytes);
662 btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes);
663 btrfs_set_file_extent_compression(leaf, fi, 0);
664 btrfs_set_file_extent_encryption(leaf, fi, 0);
665 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
666 btrfs_mark_buffer_dirty(leaf);
668 btrfs_release_path(&path);
670 ins_key.objectid = disk_bytenr;
671 ins_key.offset = num_bytes;
672 ins_key.type = BTRFS_EXTENT_ITEM_KEY;
674 ret = btrfs_insert_empty_item(trans, extent_root, &path,
675 &ins_key, sizeof(*ei));
677 leaf = path.nodes[0];
678 ei = btrfs_item_ptr(leaf, path.slots[0],
679 struct btrfs_extent_item);
681 btrfs_set_extent_refs(leaf, ei, 0);
682 btrfs_set_extent_generation(leaf, ei, trans->transid);
683 btrfs_set_extent_flags(leaf, ei, BTRFS_EXTENT_FLAG_DATA);
685 btrfs_mark_buffer_dirty(leaf);
686 ret = btrfs_update_block_group(trans, root, disk_bytenr,
690 } else if (ret != -EEXIST) {
694 ret = btrfs_inc_extent_ref(trans, root, disk_bytenr, num_bytes, 0,
695 root->root_key.objectid,
698 btrfs_release_path(&path);
702 static int add_symbolic_link(struct btrfs_trans_handle *trans,
703 struct btrfs_root *root,
704 u64 objectid, const char *path_name)
707 u64 sectorsize = root->sectorsize;
708 char *buf = malloc(sectorsize);
710 ret = readlink(path_name, buf, sectorsize);
712 fprintf(stderr, "readlink failed for %s\n", path_name);
715 if (ret >= sectorsize) {
716 fprintf(stderr, "symlink too long for %s", path_name);
721 buf[ret] = '\0'; /* readlink does not do it for us */
722 ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
729 static int add_file_items(struct btrfs_trans_handle *trans,
730 struct btrfs_root *root,
731 struct btrfs_inode_item *btrfs_inode, u64 objectid,
732 ino_t parent_inum, struct stat *st,
733 const char *path_name, int out_fd)
739 struct btrfs_key key;
741 u32 sectorsize = root->sectorsize;
746 fd = open(path_name, O_RDONLY);
748 fprintf(stderr, "%s open failed\n", path_name);
752 blocks = st->st_size / sectorsize;
753 if (st->st_size % sectorsize)
756 if (st->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root)) {
757 buffer = malloc(st->st_size);
758 ret_read = pread64(fd, buffer, st->st_size, bytes_read);
759 if (ret_read == -1) {
760 fprintf(stderr, "%s read failed\n", path_name);
764 ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
765 buffer, st->st_size);
769 ret = custom_alloc_extent(root, blocks * sectorsize, 0, &key);
773 first_block = key.objectid;
775 buffer = malloc(sectorsize);
778 memset(buffer, 0, sectorsize);
779 ret_read = pread64(fd, buffer, sectorsize, bytes_read);
780 if (ret_read == -1) {
781 fprintf(stderr, "%s read failed\n", path_name);
785 ret = pwrite64(out_fd, buffer, sectorsize,
786 first_block + bytes_read);
787 if (ret != sectorsize) {
788 fprintf(stderr, "output file write failed\n");
792 /* checksum for file data */
793 ret = btrfs_csum_file_block(trans, root->fs_info->csum_root,
794 first_block + (blocks * sectorsize),
795 first_block + bytes_read,
798 fprintf(stderr, "%s checksum failed\n", path_name);
802 bytes_read += ret_read;
804 } while (ret_read == sectorsize);
806 if (num_blocks > 0) {
807 ret = record_file_extent(trans, root, objectid, btrfs_inode,
808 first_block, first_block,
809 blocks * sectorsize);
821 static char *make_path(char *dir, char *name)
825 path = malloc(strlen(dir) + strlen(name) + 2);
829 if (dir[strlen(dir) - 1] != '/')
835 static int traverse_directory(struct btrfs_trans_handle *trans,
836 struct btrfs_root *root, char *dir_name,
837 struct directory_name_entry *dir_head, int out_fd)
841 struct btrfs_inode_item cur_inode;
842 struct btrfs_inode_item *inode_item;
843 int count, i, dir_index_cnt;
844 struct direct **files;
846 struct directory_name_entry *dir_entry, *parent_dir_entry;
847 struct direct *cur_file;
848 ino_t parent_inum, cur_inum;
849 ino_t highest_inum = 0;
850 char *parent_dir_name;
851 struct btrfs_path path;
852 struct extent_buffer *leaf;
853 struct btrfs_key root_dir_key;
854 u64 root_dir_inode_size = 0;
856 /* Add list for source directory */
857 dir_entry = malloc(sizeof(struct directory_name_entry));
858 dir_entry->dir_name = dir_name;
859 dir_entry->path = strdup(dir_name);
861 parent_inum = highest_inum + BTRFS_FIRST_FREE_OBJECTID;
862 dir_entry->inum = parent_inum;
863 list_add_tail(&dir_entry->list, &dir_head->list);
865 btrfs_init_path(&path);
867 root_dir_key.objectid = btrfs_root_dirid(&root->root_item);
868 root_dir_key.offset = 0;
869 btrfs_set_key_type(&root_dir_key, BTRFS_INODE_ITEM_KEY);
870 ret = btrfs_lookup_inode(trans, root, &path, &root_dir_key, 1);
872 fprintf(stderr, "root dir lookup error\n");
876 leaf = path.nodes[0];
877 inode_item = btrfs_item_ptr(leaf, path.slots[0],
878 struct btrfs_inode_item);
880 root_dir_inode_size = calculate_dir_inode_size(dir_name);
881 btrfs_set_inode_size(leaf, inode_item, root_dir_inode_size);
882 btrfs_mark_buffer_dirty(leaf);
884 btrfs_release_path(&path);
887 parent_dir_entry = list_entry(dir_head->list.next,
888 struct directory_name_entry,
890 list_del(&parent_dir_entry->list);
892 parent_inum = parent_dir_entry->inum;
893 parent_dir_name = parent_dir_entry->dir_name;
894 if (chdir(parent_dir_entry->path)) {
895 fprintf(stderr, "chdir error for %s\n",
900 count = scandir(parent_dir_entry->path, &files,
901 directory_select, NULL);
904 fprintf(stderr, "scandir for %s failed: %s\n",
905 parent_dir_name, strerror (errno));
909 for (i = 0; i < count; i++) {
912 if (lstat(cur_file->d_name, &st) == -1) {
913 fprintf(stderr, "lstat failed for file %s\n",
918 cur_inum = ++highest_inum + BTRFS_FIRST_FREE_OBJECTID;
919 ret = add_directory_items(trans, root,
920 cur_inum, parent_inum,
922 &st, &dir_index_cnt);
924 fprintf(stderr, "add_directory_items failed\n");
928 ret = add_inode_items(trans, root, &st,
929 cur_file->d_name, cur_inum,
930 parent_inum, dir_index_cnt,
933 fprintf(stderr, "add_inode_items failed\n");
937 ret = add_xattr_item(trans, root,
938 cur_inum, cur_file->d_name);
940 fprintf(stderr, "add_xattr_item failed\n");
945 if (S_ISDIR(st.st_mode)) {
946 dir_entry = malloc(sizeof(struct directory_name_entry));
947 dir_entry->dir_name = cur_file->d_name;
948 dir_entry->path = make_path(parent_dir_entry->path,
950 dir_entry->inum = cur_inum;
951 list_add_tail(&dir_entry->list, &dir_head->list);
952 } else if (S_ISREG(st.st_mode)) {
953 ret = add_file_items(trans, root, &cur_inode,
954 cur_inum, parent_inum, &st,
955 cur_file->d_name, out_fd);
957 fprintf(stderr, "add_file_items failed\n");
960 } else if (S_ISLNK(st.st_mode)) {
961 ret = add_symbolic_link(trans, root,
962 cur_inum, cur_file->d_name);
964 fprintf(stderr, "add_symbolic_link failed\n");
970 free_namelist(files, count);
971 free(parent_dir_entry->path);
972 free(parent_dir_entry);
976 } while (!list_empty(&dir_head->list));
980 free_namelist(files, count);
982 free(parent_dir_entry->path);
983 free(parent_dir_entry);
987 static int open_target(char *output_name)
990 output_fd = open(output_name, O_CREAT | O_RDWR | O_TRUNC,
991 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
996 static int create_chunks(struct btrfs_trans_handle *trans,
997 struct btrfs_root *root, u64 num_of_meta_chunks,
1002 u64 meta_type = BTRFS_BLOCK_GROUP_METADATA;
1003 u64 data_type = BTRFS_BLOCK_GROUP_DATA;
1004 u64 minimum_data_chunk_size = 8 * 1024 * 1024;
1008 for (i = 0; i < num_of_meta_chunks; i++) {
1009 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
1010 &chunk_start, &chunk_size, meta_type);
1012 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1013 meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1014 chunk_start, chunk_size);
1016 set_extent_dirty(&root->fs_info->free_space_cache,
1017 chunk_start, chunk_start + chunk_size - 1, 0);
1020 if (size_of_data < minimum_data_chunk_size)
1021 size_of_data = minimum_data_chunk_size;
1022 ret = btrfs_alloc_data_chunk(trans, root->fs_info->extent_root,
1023 &chunk_start, size_of_data, data_type);
1025 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1026 data_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1027 chunk_start, size_of_data);
1029 set_extent_dirty(&root->fs_info->free_space_cache,
1030 chunk_start, chunk_start + size_of_data - 1, 0);
1034 static int make_image(char *source_dir, struct btrfs_root *root, int out_fd)
1037 struct btrfs_trans_handle *trans;
1039 struct stat root_st;
1041 struct directory_name_entry dir_head;
1043 struct directory_name_entry *dir_entry = NULL;
1045 ret = lstat(source_dir, &root_st);
1047 fprintf(stderr, "unable to lstat the %s\n", source_dir);
1051 INIT_LIST_HEAD(&dir_head.list);
1053 trans = btrfs_start_transaction(root, 1);
1054 ret = traverse_directory(trans, root, source_dir, &dir_head, out_fd);
1056 fprintf(stderr, "unable to traverse_directory\n");
1059 btrfs_commit_transaction(trans, root);
1061 printf("Making image is completed.\n");
1064 while (!list_empty(&dir_head.list)) {
1065 dir_entry = list_entry(dir_head.list.next,
1066 struct directory_name_entry, list);
1067 list_del(&dir_entry->list);
1070 fprintf(stderr, "Making image is aborted.\n");
1075 * This ignores symlinks with unreadable targets and subdirs that can't
1076 * be read. It's a best-effort to give a rough estimate of the size of
1077 * a subdir. It doesn't guarantee that prepopulating btrfs from this
1078 * tree won't still run out of space.
1080 * The rounding up to 4096 is questionable. Previous code used du -B 4096.
1082 static u64 global_total_size;
1083 static int ftw_add_entry_size(const char *fpath, const struct stat *st,
1086 if (type == FTW_F || type == FTW_D)
1087 global_total_size += round_up(st->st_size, 4096);
1092 static u64 size_sourcedir(char *dir_name, u64 sectorsize,
1093 u64 *num_of_meta_chunks_ret, u64 *size_of_data_ret)
1098 u64 default_chunk_size = 8 * 1024 * 1024; /* 8MB */
1099 u64 allocated_meta_size = 8 * 1024 * 1024; /* 8MB */
1100 u64 allocated_total_size = 20 * 1024 * 1024; /* 20MB */
1101 u64 num_of_meta_chunks = 0;
1102 u64 num_of_allocated_meta_chunks =
1103 allocated_meta_size / default_chunk_size;
1105 global_total_size = 0;
1106 ret = ftw(dir_name, ftw_add_entry_size, 10);
1107 dir_size = global_total_size;
1109 fprintf(stderr, "ftw subdir walk of '%s' failed: %s\n",
1110 dir_name, strerror(errno));
1114 num_of_meta_chunks = (dir_size / 2) / default_chunk_size;
1115 if (((dir_size / 2) % default_chunk_size) != 0)
1116 num_of_meta_chunks++;
1117 if (num_of_meta_chunks <= num_of_allocated_meta_chunks)
1118 num_of_meta_chunks = 0;
1120 num_of_meta_chunks -= num_of_allocated_meta_chunks;
1122 total_size = allocated_total_size + dir_size +
1123 (num_of_meta_chunks * default_chunk_size);
1125 *num_of_meta_chunks_ret = num_of_meta_chunks;
1130 static int zero_output_file(int out_fd, u64 size, u32 sectorsize)
1132 int len = sectorsize;
1133 int loop_num = size / sectorsize;
1135 char *buf = malloc(len);
1141 memset(buf, 0, len);
1142 for (i = 0; i < loop_num; i++) {
1143 written = pwrite64(out_fd, buf, len, location);
1146 location += sectorsize;
1152 static int check_leaf_or_node_size(u32 size, u32 sectorsize)
1154 if (size < sectorsize) {
1156 "Illegal leafsize (or nodesize) %u (smaller than %u)\n",
1159 } else if (size > BTRFS_MAX_METADATA_BLOCKSIZE) {
1161 "Illegal leafsize (or nodesize) %u (larger than %u)\n",
1162 size, BTRFS_MAX_METADATA_BLOCKSIZE);
1164 } else if (size & (sectorsize - 1)) {
1166 "Illegal leafsize (or nodesize) %u (not align to %u)\n",
1173 static int is_ssd(const char *file)
1177 char sysfs_path[PATH_MAX];
1183 probe = blkid_new_probe_from_filename(file);
1187 /* Device number of this disk (possibly a partition) */
1188 devno = blkid_probe_get_devno(probe);
1190 blkid_free_probe(probe);
1194 /* Get whole disk name (not full path) for this devno */
1195 ret = blkid_devno_to_wholedisk(devno,
1196 wholedisk, sizeof(wholedisk), NULL);
1198 blkid_free_probe(probe);
1202 snprintf(sysfs_path, PATH_MAX, "/sys/block/%s/queue/rotational",
1205 blkid_free_probe(probe);
1207 fd = open(sysfs_path, O_RDONLY);
1212 if (read(fd, &rotational, sizeof(char)) < sizeof(char)) {
1218 return !atoi((const char *)&rotational);
1221 #define BTRFS_FEATURE_LIST_ALL (1ULL << 63)
1223 static const struct btrfs_fs_feature {
1227 } mkfs_features[] = {
1228 { "mixed-bg", BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS,
1229 "mixed data and metadata block groups" },
1230 { "extref", BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF,
1231 "increased hardlink limit per file to 65536" },
1232 { "raid56", BTRFS_FEATURE_INCOMPAT_RAID56,
1233 "raid56 extended format" },
1234 { "skinny-metadata", BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA,
1235 "reduced-size metadata extent refs" },
1236 /* Keep this one last */
1237 { "list-all", BTRFS_FEATURE_LIST_ALL, NULL }
1240 static void list_all_fs_features(void)
1244 fprintf(stderr, "Filesystem features available at mkfs time:\n");
1245 for (i = 0; i < ARRAY_SIZE(mkfs_features) - 1; i++) {
1246 fprintf(stderr, "%-20s- %s (0x%llx)\n",
1247 mkfs_features[i].name,
1248 mkfs_features[i].desc,
1249 mkfs_features[i].flag);
1253 static int parse_one_fs_feature(const char *name, u64 *flags)
1258 for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) {
1259 if (!strcmp(mkfs_features[i].name, name)) {
1260 *flags |= mkfs_features[i].flag;
1268 static void process_fs_features(u64 flags)
1272 for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) {
1273 if (flags & mkfs_features[i].flag) {
1275 "Turning ON incompat feature '%s': %s\n",
1276 mkfs_features[i].name,
1277 mkfs_features[i].desc);
1284 * Return NULL if all features were parsed fine, otherwise return the name of
1285 * the first unparsed.
1287 static char* parse_fs_features(char *namelist, u64 *flags)
1290 char *save_ptr = NULL; /* Satisfy static checkers */
1292 for (this_char = strtok_r(namelist, ",", &save_ptr);
1294 this_char = strtok_r(NULL, ",", &save_ptr)) {
1295 if (parse_one_fs_feature(this_char, flags))
1302 int main(int ac, char **av)
1305 struct btrfs_root *root;
1306 struct btrfs_trans_handle *trans;
1309 u64 block_count = 0;
1310 u64 dev_block_count = 0;
1312 u64 alloc_start = 0;
1313 u64 metadata_profile = 0;
1314 u64 data_profile = 0;
1315 u32 leafsize = sysconf(_SC_PAGESIZE);
1316 u32 sectorsize = 4096;
1317 u32 nodesize = leafsize;
1318 u32 stripesize = 4096;
1320 int option_index = 0;
1325 int data_profile_opt = 0;
1326 int metadata_profile_opt = 0;
1329 int force_overwrite = 0;
1331 char *source_dir = NULL;
1332 int source_dir_set = 0;
1333 u64 num_of_meta_chunks = 0;
1334 u64 size_of_data = 0;
1335 u64 source_dir_size = 0;
1343 c = getopt_long(ac, av, "A:b:fl:n:s:m:d:L:O:r:VMK",
1344 long_options, &option_index);
1349 alloc_start = parse_size(optarg);
1352 force_overwrite = 1;
1355 data_profile = parse_profile(optarg);
1356 data_profile_opt = 1;
1360 nodesize = parse_size(optarg);
1361 leafsize = parse_size(optarg);
1364 label = parse_label(optarg);
1367 metadata_profile = parse_profile(optarg);
1368 metadata_profile_opt = 1;
1374 char *orig = strdup(optarg);
1377 tmp = parse_fs_features(tmp, &features);
1380 "Unrecognized filesystem feature '%s'\n",
1386 if (features & BTRFS_FEATURE_LIST_ALL) {
1387 list_all_fs_features();
1393 sectorsize = parse_size(optarg);
1396 block_count = parse_size(optarg);
1397 if (block_count <= 1024*1024*1024) {
1398 printf("SMALL VOLUME: forcing mixed "
1399 "metadata/data groups\n");
1408 source_dir = optarg;
1418 sectorsize = max(sectorsize, (u32)sysconf(_SC_PAGESIZE));
1419 if (check_leaf_or_node_size(leafsize, sectorsize))
1421 if (check_leaf_or_node_size(nodesize, sectorsize))
1423 saved_optind = optind;
1424 dev_cnt = ac - optind;
1428 if (source_dir_set && dev_cnt > 1) {
1430 "The -r option is limited to a single device\n");
1433 while (dev_cnt-- > 0) {
1434 file = av[optind++];
1435 if (is_block_device(file))
1436 if (test_dev_for_mkfs(file, force_overwrite, estr)) {
1437 fprintf(stderr, "Error: %s", estr);
1442 optind = saved_optind;
1443 dev_cnt = ac - optind;
1445 file = av[optind++];
1448 if (is_vol_small(file)) {
1449 printf("SMALL VOLUME: forcing mixed metadata/data groups\n");
1451 if (metadata_profile != data_profile) {
1452 if (metadata_profile_opt || data_profile_opt) {
1454 "With mixed block groups data and metadata profiles must be the same\n");
1460 * Set default profiles according to number of added devices.
1461 * For mixed groups defaults are single/single.
1464 if (!metadata_profile_opt) {
1465 if (dev_cnt == 1 && ssd)
1466 printf("Detected a SSD, turning off metadata "
1467 "duplication. Mkfs with -m dup if you want to "
1468 "force metadata duplication.\n");
1470 metadata_profile = (dev_cnt > 1) ?
1471 BTRFS_BLOCK_GROUP_RAID1 : (ssd) ?
1472 0: BTRFS_BLOCK_GROUP_DUP;
1474 if (!data_profile_opt) {
1475 data_profile = (dev_cnt > 1) ?
1476 BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */
1479 metadata_profile = 0;
1483 ret = test_num_disk_vs_raid(metadata_profile, data_profile,
1484 dev_cnt, mixed, estr);
1486 fprintf(stderr, "Error: %s\n", estr);
1490 /* if we are here that means all devs are good to btrfsify */
1491 printf("\nWARNING! - %s IS EXPERIMENTAL\n", BTRFS_BUILD_VERSION);
1492 printf("WARNING! - see http://btrfs.wiki.kernel.org before using\n\n");
1496 if (!source_dir_set) {
1498 * open without O_EXCL so that the problem should not
1499 * occur by the following processing.
1500 * (btrfs_register_one_device() fails if O_EXCL is on)
1502 fd = open(file, O_RDWR);
1504 fprintf(stderr, "unable to open %s: %s\n", file,
1509 ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count,
1510 block_count, &mixed, discard);
1511 if (block_count && block_count > dev_block_count) {
1512 fprintf(stderr, "%s is smaller than requested size\n", file);
1516 fd = open_target(file);
1518 fprintf(stderr, "unable to open the %s\n", file);
1523 source_dir_size = size_sourcedir(source_dir, sectorsize,
1524 &num_of_meta_chunks, &size_of_data);
1525 if(block_count < source_dir_size)
1526 block_count = source_dir_size;
1527 ret = zero_output_file(fd, block_count, sectorsize);
1529 fprintf(stderr, "unable to zero the output file\n");
1532 /* our "device" is the new image file */
1533 dev_block_count = block_count;
1536 /* To create the first block group and chunk 0 in make_btrfs */
1537 if (dev_block_count < BTRFS_MKFS_SYSTEM_GROUP_SIZE) {
1538 fprintf(stderr, "device is too small to make filesystem\n");
1542 blocks[0] = BTRFS_SUPER_INFO_OFFSET;
1543 for (i = 1; i < 7; i++) {
1544 blocks[i] = BTRFS_SUPER_INFO_OFFSET + 1024 * 1024 +
1549 * FS features that can be set by other means than -O
1550 * just set the bit here
1553 features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
1555 if ((data_profile | metadata_profile) &
1556 (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
1557 features |= BTRFS_FEATURE_INCOMPAT_RAID56;
1560 process_fs_features(features);
1562 ret = make_btrfs(fd, file, label, blocks, dev_block_count,
1564 sectorsize, stripesize, features);
1566 fprintf(stderr, "error during mkfs: %s\n", strerror(-ret));
1570 root = open_ctree(file, 0, O_RDWR);
1572 fprintf(stderr, "Open ctree failed\n");
1576 root->fs_info->alloc_start = alloc_start;
1578 ret = make_root_dir(root, mixed);
1580 fprintf(stderr, "failed to setup the root directory\n");
1584 trans = btrfs_start_transaction(root, 1);
1589 btrfs_register_one_device(file);
1592 while (dev_cnt-- > 0) {
1593 int old_mixed = mixed;
1595 file = av[optind++];
1598 * open without O_EXCL so that the problem should not
1599 * occur by the following processing.
1600 * (btrfs_register_one_device() fails if O_EXCL is on)
1602 fd = open(file, O_RDWR);
1604 fprintf(stderr, "unable to open %s: %s\n", file,
1608 ret = btrfs_device_already_in_root(root, fd,
1609 BTRFS_SUPER_INFO_OFFSET);
1611 fprintf(stderr, "skipping duplicate device %s in FS\n",
1616 ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count,
1617 block_count, &mixed, discard);
1621 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
1622 sectorsize, sectorsize, sectorsize);
1624 btrfs_register_one_device(file);
1628 if (!source_dir_set) {
1629 ret = create_raid_groups(trans, root, data_profile,
1630 data_profile_opt, metadata_profile,
1631 metadata_profile_opt, mixed, ssd);
1635 ret = create_data_reloc_tree(trans, root);
1638 printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
1639 "sectorsize %u size %s\n",
1640 label, first_file, nodesize, leafsize, sectorsize,
1641 pretty_size(btrfs_super_total_bytes(root->fs_info->super_copy)));
1643 printf("%s\n", BTRFS_BUILD_VERSION);
1644 btrfs_commit_transaction(trans, root);
1646 if (source_dir_set) {
1647 trans = btrfs_start_transaction(root, 1);
1648 ret = create_chunks(trans, root,
1649 num_of_meta_chunks, size_of_data);
1651 btrfs_commit_transaction(trans, root);
1653 ret = make_image(source_dir, root, fd);
1657 ret = close_ctree(root);