mkfs.c

   1 /*
   2  * Copyright (C) 2007 Oracle.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public
   6  * License v2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public
  14  * License along with this program; if not, write to the
  15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  16  * Boston, MA 021110-1307, USA.
  17  */
  18
  19 #define _XOPEN_SOURCE 500
  20 #define _GNU_SOURCE
  21
  22 #ifndef __CHECKER__
  23 #include <sys/ioctl.h>
  24 #include <sys/mount.h>
  25 #include "ioctl.h"
  26 #endif
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <sys/types.h>
  31 #include <sys/stat.h>
  32 #include <sys/dir.h>
  33 #include <fcntl.h>
  34 #include <unistd.h>
  35 #include <getopt.h>
  36 #include <uuid/uuid.h>
  37 #include <linux/fs.h>
  38 #include <ctype.h>
  39 #include <attr/xattr.h>
  40 #include "kerncompat.h"
  41 #include "ctree.h"
  42 #include "disk-io.h"
  43 #include "volumes.h"
  44 #include "transaction.h"
  45 #include "utils.h"
  46 #include "version.h"
  47
  48 static u64 index_cnt = 2;
  49
  50 struct directory_name_entry {
  51         char *dir_name;
  52         char *path;
  53         ino_t inum;
  54         struct list_head list;
  55 };
  56
  57 static u64 parse_size(char *s)
  58 {
  59         int len = strlen(s);
  60         char c;
  61         u64 mult = 1;
  62
  63         if (!isdigit(s[len - 1])) {
  64                 c = tolower(s[len - 1]);
  65                 switch (c) {
  66                 case 'g':
  67                         mult *= 1024;
  68                 case 'm':
  69                         mult *= 1024;
  70                 case 'k':
  71                         mult *= 1024;
  72                 case 'b':
  73                         break;
  74                 default:
  75                         fprintf(stderr, "Unknown size descriptor %c\n", c);
  76                         exit(1);
  77                 }
  78                 s[len - 1] = '\0';
  79         }
  80         return atol(s) * mult;
  81 }
  82
  83 static int make_root_dir(struct btrfs_root *root, int mixed)
  84 {
  85         struct btrfs_trans_handle *trans;
  86         struct btrfs_key location;
  87         u64 bytes_used;
  88         u64 chunk_start = 0;
  89         u64 chunk_size = 0;
  90         int ret;
  91
  92         trans = btrfs_start_transaction(root, 1);
  93         bytes_used = btrfs_super_bytes_used(&root->fs_info->super_copy);
  94
  95         root->fs_info->system_allocs = 1;
  96         ret = btrfs_make_block_group(trans, root, bytes_used,
  97                                      BTRFS_BLOCK_GROUP_SYSTEM,
  98                                      BTRFS_FIRST_CHUNK_TREE_OBJECTID,
  99                                      0, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
 100         BUG_ON(ret);
 101
 102         if (mixed) {
 103                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 104                                         &chunk_start, &chunk_size,
 105                                         BTRFS_BLOCK_GROUP_METADATA |
 106                                         BTRFS_BLOCK_GROUP_DATA);
 107                 BUG_ON(ret);
 108                 ret = btrfs_make_block_group(trans, root, 0,
 109                                              BTRFS_BLOCK_GROUP_METADATA |
 110                                              BTRFS_BLOCK_GROUP_DATA,
 111                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 112                                              chunk_start, chunk_size);
 113                 BUG_ON(ret);
 114                 printf("Created a data/metadata chunk of size %llu\n", chunk_size);
 115         } else {
 116                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 117                                         &chunk_start, &chunk_size,
 118                                         BTRFS_BLOCK_GROUP_METADATA);
 119                 BUG_ON(ret);
 120                 ret = btrfs_make_block_group(trans, root, 0,
 121                                              BTRFS_BLOCK_GROUP_METADATA,
 122                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 123                                              chunk_start, chunk_size);
 124                 BUG_ON(ret);
 125         }
 126
 127         root->fs_info->system_allocs = 0;
 128         btrfs_commit_transaction(trans, root);
 129         trans = btrfs_start_transaction(root, 1);
 130         BUG_ON(!trans);
 131
 132         if (!mixed) {
 133                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 134                                         &chunk_start, &chunk_size,
 135                                         BTRFS_BLOCK_GROUP_DATA);
 136                 BUG_ON(ret);
 137                 ret = btrfs_make_block_group(trans, root, 0,
 138                                              BTRFS_BLOCK_GROUP_DATA,
 139                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 140                                              chunk_start, chunk_size);
 141                 BUG_ON(ret);
 142         }
 143
 144         ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
 145                               BTRFS_ROOT_TREE_DIR_OBJECTID);
 146         if (ret)
 147                 goto err;
 148         ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
 149         if (ret)
 150                 goto err;
 151         memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
 152         location.offset = (u64)-1;
 153         ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
 154                         "default", 7,
 155                         btrfs_super_root_dir(&root->fs_info->super_copy),
 156                         &location, BTRFS_FT_DIR, 0);
 157         if (ret)
 158                 goto err;
 159
 160         ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
 161                              "default", 7, location.objectid,
 162                              BTRFS_ROOT_TREE_DIR_OBJECTID, 0);
 163         if (ret)
 164                 goto err;
 165
 166         btrfs_commit_transaction(trans, root);
 167 err:
 168         return ret;
 169 }
 170
 171 static int recow_roots(struct btrfs_trans_handle *trans,
 172                        struct btrfs_root *root)
 173 {
 174         int ret;
 175         struct extent_buffer *tmp;
 176         struct btrfs_fs_info *info = root->fs_info;
 177
 178         ret = __btrfs_cow_block(trans, info->fs_root, info->fs_root->node,
 179                                 NULL, 0, &tmp, 0, 0);
 180         BUG_ON(ret);
 181         free_extent_buffer(tmp);
 182
 183         ret = __btrfs_cow_block(trans, info->tree_root, info->tree_root->node,
 184                                 NULL, 0, &tmp, 0, 0);
 185         BUG_ON(ret);
 186         free_extent_buffer(tmp);
 187
 188         ret = __btrfs_cow_block(trans, info->extent_root,
 189                                 info->extent_root->node, NULL, 0, &tmp, 0, 0);
 190         BUG_ON(ret);
 191         free_extent_buffer(tmp);
 192
 193         ret = __btrfs_cow_block(trans, info->chunk_root, info->chunk_root->node,
 194                                 NULL, 0, &tmp, 0, 0);
 195         BUG_ON(ret);
 196         free_extent_buffer(tmp);
 197
 198
 199         ret = __btrfs_cow_block(trans, info->dev_root, info->dev_root->node,
 200                                 NULL, 0, &tmp, 0, 0);
 201         BUG_ON(ret);
 202         free_extent_buffer(tmp);
 203
 204         ret = __btrfs_cow_block(trans, info->csum_root, info->csum_root->node,
 205                                 NULL, 0, &tmp, 0, 0);
 206         BUG_ON(ret);
 207         free_extent_buffer(tmp);
 208
 209         return 0;
 210 }
 211
 212 static int create_one_raid_group(struct btrfs_trans_handle *trans,
 213                               struct btrfs_root *root, u64 type)
 214 {
 215         u64 chunk_start;
 216         u64 chunk_size;
 217         int ret;
 218
 219         ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 220                                 &chunk_start, &chunk_size, type);
 221         BUG_ON(ret);
 222         ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
 223                                      type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 224                                      chunk_start, chunk_size);
 225         BUG_ON(ret);
 226         return ret;
 227 }
 228
 229 static int create_raid_groups(struct btrfs_trans_handle *trans,
 230                               struct btrfs_root *root, u64 data_profile,
 231                               u64 metadata_profile, int mixed)
 232 {
 233         u64 num_devices = btrfs_super_num_devices(&root->fs_info->super_copy);
 234         u64 allowed;
 235         int ret;
 236
 237         if (num_devices == 1)
 238                 allowed = BTRFS_BLOCK_GROUP_DUP;
 239         else if (num_devices >= 4) {
 240                 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
 241                         BTRFS_BLOCK_GROUP_RAID10;
 242         } else
 243                 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1;
 244
 245         if (allowed & metadata_profile) {
 246                 u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA;
 247
 248                 ret = create_one_raid_group(trans, root,
 249                                             BTRFS_BLOCK_GROUP_SYSTEM |
 250                                             (allowed & metadata_profile));
 251                 BUG_ON(ret);
 252
 253                 if (mixed)
 254                         meta_flags |= BTRFS_BLOCK_GROUP_DATA;
 255
 256                 ret = create_one_raid_group(trans, root, meta_flags |
 257                                             (allowed & metadata_profile));
 258                 BUG_ON(ret);
 259
 260                 ret = recow_roots(trans, root);
 261                 BUG_ON(ret);
 262         }
 263         if (!mixed && num_devices > 1 && (allowed & data_profile)) {
 264                 ret = create_one_raid_group(trans, root,
 265                                             BTRFS_BLOCK_GROUP_DATA |
 266                                             (allowed & data_profile));
 267                 BUG_ON(ret);
 268         }
 269         return 0;
 270 }
 271
 272 static int create_data_reloc_tree(struct btrfs_trans_handle *trans,
 273                                   struct btrfs_root *root)
 274 {
 275         struct btrfs_key location;
 276         struct btrfs_root_item root_item;
 277         struct extent_buffer *tmp;
 278         u64 objectid = BTRFS_DATA_RELOC_TREE_OBJECTID;
 279         int ret;
 280
 281         ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
 282         BUG_ON(ret);
 283
 284         memcpy(&root_item, &root->root_item, sizeof(root_item));
 285         btrfs_set_root_bytenr(&root_item, tmp->start);
 286         btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
 287         btrfs_set_root_generation(&root_item, trans->transid);
 288         free_extent_buffer(tmp);
 289
 290         location.objectid = objectid;
 291         location.type = BTRFS_ROOT_ITEM_KEY;
 292         location.offset = 0;
 293         ret = btrfs_insert_root(trans, root->fs_info->tree_root,
 294                                 &location, &root_item);
 295         BUG_ON(ret);
 296         return 0;
 297 }
 298
 299 static void print_usage(void)
 300 {
 301         fprintf(stderr, "usage: mkfs.btrfs [options] dev [ dev ... ]\n");
 302         fprintf(stderr, "options:\n");
 303         fprintf(stderr, "\t -A --alloc-start the offset to start the FS\n");
 304         fprintf(stderr, "\t -b --byte-count total number of bytes in the FS\n");
 305         fprintf(stderr, "\t -d --data data profile, raid0, raid1, raid10 or single\n");
 306         fprintf(stderr, "\t -l --leafsize size of btree leaves\n");
 307         fprintf(stderr, "\t -L --label set a label\n");
 308         fprintf(stderr, "\t -m --metadata metadata profile, values like data profile\n");
 309         fprintf(stderr, "\t -M --mixed mix metadata and data together\n");
 310         fprintf(stderr, "\t -n --nodesize size of btree nodes\n");
 311         fprintf(stderr, "\t -s --sectorsize min block allocation\n");
 312         fprintf(stderr, "\t -r --rootdir the source directory\n");
 313         fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
 314         exit(1);
 315 }
 316
 317 static void print_version(void)
 318 {
 319         fprintf(stderr, "mkfs.btrfs, part of %s\n", BTRFS_BUILD_VERSION);
 320         exit(0);
 321 }
 322
 323 static u64 parse_profile(char *s)
 324 {
 325         if (strcmp(s, "raid0") == 0) {
 326                 return BTRFS_BLOCK_GROUP_RAID0;
 327         } else if (strcmp(s, "raid1") == 0) {
 328                 return BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_DUP;
 329         } else if (strcmp(s, "raid10") == 0) {
 330                 return BTRFS_BLOCK_GROUP_RAID10 | BTRFS_BLOCK_GROUP_DUP;
 331         } else if (strcmp(s, "single") == 0) {
 332                 return 0;
 333         } else {
 334                 fprintf(stderr, "Unknown option %s\n", s);
 335                 print_usage();
 336         }
 337         return 0;
 338 }
 339
 340 static char *parse_label(char *input)
 341 {
 342         int i;
 343         int len = strlen(input);
 344
 345         if (len > BTRFS_LABEL_SIZE) {
 346                 fprintf(stderr, "Label %s is too long (max %d)\n", input,
 347                         BTRFS_LABEL_SIZE);
 348                 exit(1);
 349         }
 350         for (i = 0; i < len; i++) {
 351                 if (input[i] == '/' || input[i] == '\\') {
 352                         fprintf(stderr, "invalid label %s\n", input);
 353                         exit(1);
 354                 }
 355         }
 356         return strdup(input);
 357 }
 358
 359 static struct option long_options[] = {
 360         { "alloc-start", 1, NULL, 'A'},
 361         { "byte-count", 1, NULL, 'b' },
 362         { "leafsize", 1, NULL, 'l' },
 363         { "label", 1, NULL, 'L'},
 364         { "metadata", 1, NULL, 'm' },
 365         { "mixed", 0, NULL, 'M' },
 366         { "nodesize", 1, NULL, 'n' },
 367         { "sectorsize", 1, NULL, 's' },
 368         { "data", 1, NULL, 'd' },
 369         { "version", 0, NULL, 'V' },
 370         { "rootdir", 1, NULL, 'r' },
 371         { 0, 0, 0, 0}
 372 };
 373
 374 static int add_directory_items(struct btrfs_trans_handle *trans,
 375                                struct btrfs_root *root, u64 objectid,
 376                                ino_t parent_inum, const char *name,
 377                                struct stat *st, int *dir_index_cnt)
 378 {
 379         int ret;
 380         int name_len;
 381         struct btrfs_key location;
 382         u8 filetype = 0;
 383
 384         name_len = strlen(name);
 385
 386         location.objectid = objectid;
 387         location.offset = 0;
 388         btrfs_set_key_type(&location, BTRFS_INODE_ITEM_KEY);
 389
 390         if (S_ISDIR(st->st_mode))
 391                 filetype = BTRFS_FT_DIR;
 392         if (S_ISREG(st->st_mode))
 393                 filetype = BTRFS_FT_REG_FILE;
 394         if (S_ISLNK(st->st_mode))
 395                 filetype = BTRFS_FT_SYMLINK;
 396
 397         ret = btrfs_insert_dir_item(trans, root, name, name_len,
 398                                     parent_inum, &location,
 399                                     filetype, index_cnt);
 400
 401         *dir_index_cnt = index_cnt;
 402         index_cnt++;
 403
 404         return ret;
 405 }
 406
 407 static int fill_inode_item(struct btrfs_trans_handle *trans,
 408                            struct btrfs_root *root,
 409                            struct btrfs_inode_item *dst, struct stat *src)
 410 {
 411         u64 blocks = 0;
 412         u64 sectorsize = root->sectorsize;
 413
 414         btrfs_set_stack_inode_generation(dst, trans->transid);
 415         btrfs_set_stack_inode_size(dst, src->st_size);
 416         btrfs_set_stack_inode_nbytes(dst, 0);
 417         btrfs_set_stack_inode_block_group(dst, 0);
 418         btrfs_set_stack_inode_nlink(dst, src->st_nlink);
 419         btrfs_set_stack_inode_uid(dst, src->st_uid);
 420         btrfs_set_stack_inode_gid(dst, src->st_gid);
 421         btrfs_set_stack_inode_mode(dst, src->st_mode);
 422         btrfs_set_stack_inode_rdev(dst, 0);
 423         btrfs_set_stack_inode_flags(dst, 0);
 424         btrfs_set_stack_timespec_sec(&dst->atime, src->st_atime);
 425         btrfs_set_stack_timespec_nsec(&dst->atime, 0);
 426         btrfs_set_stack_timespec_sec(&dst->ctime, src->st_ctime);
 427         btrfs_set_stack_timespec_nsec(&dst->ctime, 0);
 428         btrfs_set_stack_timespec_sec(&dst->mtime, src->st_mtime);
 429         btrfs_set_stack_timespec_nsec(&dst->mtime, 0);
 430         btrfs_set_stack_timespec_sec(&dst->otime, 0);
 431         btrfs_set_stack_timespec_nsec(&dst->otime, 0);
 432
 433         if (S_ISDIR(src->st_mode)) {
 434                 btrfs_set_stack_inode_size(dst, 0);
 435                 btrfs_set_stack_inode_nlink(dst, 1);
 436         }
 437         if (S_ISREG(src->st_mode)) {
 438                 btrfs_set_stack_inode_size(dst, (u64)src->st_size);
 439                 if (src->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root))
 440                         btrfs_set_stack_inode_nbytes(dst, src->st_size);
 441                 else {
 442                         blocks = src->st_size / sectorsize;
 443                         if (src->st_size % sectorsize)
 444                                 blocks += 1;
 445                         blocks *= sectorsize;
 446                         btrfs_set_stack_inode_nbytes(dst, blocks);
 447                 }
 448         }
 449         if (S_ISLNK(src->st_mode))
 450                 btrfs_set_stack_inode_nbytes(dst, src->st_size + 1);
 451
 452         return 0;
 453 }
 454
 455 static int directory_select(const struct direct *entry)
 456 {
 457         if ((strncmp(entry->d_name, ".", entry->d_reclen) == 0) ||
 458                 (strncmp(entry->d_name, "..", entry->d_reclen) == 0))
 459                 return 0;
 460         else
 461                 return 1;
 462 }
 463
 464 static u64 calculate_dir_inode_size(char *dirname)
 465 {
 466         int count, i;
 467         struct direct **files, *cur_file;
 468         u64 dir_inode_size = 0;
 469
 470         count = scandir(dirname, &files, directory_select, NULL);
 471
 472         for (i = 0; i < count; i++) {
 473                 cur_file = files[i];
 474                 dir_inode_size += strlen(cur_file->d_name);
 475         }
 476
 477         dir_inode_size *= 2;
 478         return dir_inode_size;
 479 }
 480
 481 static int add_inode_items(struct btrfs_trans_handle *trans,
 482                            struct btrfs_root *root,
 483                            struct stat *st, char *name,
 484                            u64 self_objectid, ino_t parent_inum,
 485                            int dir_index_cnt, struct btrfs_inode_item *inode_ret)
 486 {
 487         int ret;
 488         struct btrfs_key inode_key;
 489         struct btrfs_inode_item btrfs_inode;
 490         u64 objectid;
 491         u64 inode_size = 0;
 492         int name_len;
 493
 494         name_len = strlen(name);
 495         fill_inode_item(trans, root, &btrfs_inode, st);
 496         objectid = self_objectid;
 497
 498         if (S_ISDIR(st->st_mode)) {
 499                 inode_size = calculate_dir_inode_size(name);
 500                 btrfs_set_stack_inode_size(&btrfs_inode, inode_size);
 501         }
 502
 503         inode_key.objectid = objectid;
 504         inode_key.offset = 0;
 505         btrfs_set_key_type(&inode_key, BTRFS_INODE_ITEM_KEY);
 506
 507         ret = btrfs_insert_inode(trans, root, objectid, &btrfs_inode);
 508         if (ret)
 509                 goto fail;
 510
 511         ret = btrfs_insert_inode_ref(trans, root, name, name_len,
 512                                      objectid, parent_inum, dir_index_cnt);
 513         if (ret)
 514                 goto fail;
 515
 516         *inode_ret = btrfs_inode;
 517 fail:
 518         return ret;
 519 }
 520
 521 static int add_xattr_item(struct btrfs_trans_handle *trans,
 522                           struct btrfs_root *root, u64 objectid,
 523                           const char *file_name)
 524 {
 525         int ret;
 526         int cur_name_len;
 527         char xattr_list[XATTR_LIST_MAX];
 528         char *cur_name;
 529         char cur_value[XATTR_SIZE_MAX];
 530         char delimiter = '\0';
 531         char *next_location = xattr_list;
 532
 533         ret = llistxattr(file_name, xattr_list, XATTR_LIST_MAX);
 534         if (ret < 0) {
 535                 fprintf(stderr, "get a list of xattr failed for %s\n",
 536                         file_name);
 537                 return ret;
 538         }
 539         if (ret == 0)
 540                 return ret;
 541
 542         cur_name = strtok(xattr_list, &delimiter);
 543         while (cur_name != NULL) {
 544                 cur_name_len = strlen(cur_name);
 545                 next_location += cur_name_len + 1;
 546
 547                 ret = getxattr(file_name, cur_name, cur_value, XATTR_SIZE_MAX);
 548                 if (ret < 0) {
 549                         fprintf(stderr, "get a xattr value failed for %s\n",
 550                                 cur_name);
 551                 }
 552
 553                 ret = btrfs_insert_xattr_item(trans, root, cur_name,
 554                                               cur_name_len, cur_value,
 555                                               ret, objectid);
 556                 if (ret) {
 557                         fprintf(stderr, "insert a xattr item failed for %s\n",
 558                                 file_name);
 559                 }
 560
 561                 cur_name = strtok(next_location, &delimiter);
 562         }
 563
 564         return ret;
 565 }
 566
 567 static int custom_alloc_extent(struct btrfs_root *root, u64 num_bytes,
 568                                u64 hint_byte, struct btrfs_key *ins)
 569 {
 570         u64 start;
 571         u64 end;
 572         u64 last = hint_byte;
 573         int ret;
 574         int wrapped = 0;
 575         struct btrfs_block_group_cache *cache;
 576
 577         while (1) {
 578                 ret = find_first_extent_bit(&root->fs_info->free_space_cache,
 579                                             last, &start, &end, EXTENT_DIRTY);
 580                 if (ret) {
 581                         if (wrapped++ == 0) {
 582                                 last = 0;
 583                                 continue;
 584                         } else {
 585                                 goto fail;
 586                         }
 587                 }
 588
 589                 start = max(last, start);
 590                 last = end + 1;
 591                 if (last - start < num_bytes)
 592                         continue;
 593
 594                 last = start + num_bytes;
 595                 if (test_range_bit(&root->fs_info->pinned_extents,
 596                                    start, last - 1, EXTENT_DIRTY, 0))
 597                         continue;
 598
 599                 cache = btrfs_lookup_block_group(root->fs_info, start);
 600                 BUG_ON(!cache);
 601                 if (cache->flags & BTRFS_BLOCK_GROUP_SYSTEM ||
 602                     last > cache->key.objectid + cache->key.offset) {
 603                         last = cache->key.objectid + cache->key.offset;
 604                         continue;
 605                 }
 606
 607                 if (cache->flags & (BTRFS_BLOCK_GROUP_SYSTEM |
 608                             BTRFS_BLOCK_GROUP_METADATA)) {
 609                         last = cache->key.objectid + cache->key.offset;
 610                         continue;
 611                 }
 612
 613                 clear_extent_dirty(&root->fs_info->free_space_cache,
 614                                    start, start + num_bytes - 1, 0);
 615
 616                 ins->objectid = start;
 617                 ins->offset = num_bytes;
 618                 ins->type = BTRFS_EXTENT_ITEM_KEY;
 619                 return 0;
 620         }
 621 fail:
 622         fprintf(stderr, "not enough free space\n");
 623         return -ENOSPC;
 624 }
 625
 626 static int record_file_extent(struct btrfs_trans_handle *trans,
 627                               struct btrfs_root *root, u64 objectid,
 628                               struct btrfs_inode_item *inode,
 629                               u64 file_pos, u64 disk_bytenr,
 630                               u64 num_bytes)
 631 {
 632         int ret;
 633         struct btrfs_fs_info *info = root->fs_info;
 634         struct btrfs_root *extent_root = info->extent_root;
 635         struct extent_buffer *leaf;
 636         struct btrfs_file_extent_item *fi;
 637         struct btrfs_key ins_key;
 638         struct btrfs_path path;
 639         struct btrfs_extent_item *ei;
 640
 641         btrfs_init_path(&path);
 642
 643         ins_key.objectid = objectid;
 644         ins_key.offset = 0;
 645         btrfs_set_key_type(&ins_key, BTRFS_EXTENT_DATA_KEY);
 646         ret = btrfs_insert_empty_item(trans, root, &path, &ins_key,
 647                                       sizeof(*fi));
 648         if (ret)
 649                 goto fail;
 650         leaf = path.nodes[0];
 651         fi = btrfs_item_ptr(leaf, path.slots[0],
 652                             struct btrfs_file_extent_item);
 653         btrfs_set_file_extent_generation(leaf, fi, trans->transid);
 654         btrfs_set_file_extent_type(leaf, fi, BTRFS_FILE_EXTENT_REG);
 655         btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
 656         btrfs_set_file_extent_disk_num_bytes(leaf, fi, num_bytes);
 657         btrfs_set_file_extent_offset(leaf, fi, 0);
 658         btrfs_set_file_extent_num_bytes(leaf, fi, num_bytes);
 659         btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes);
 660         btrfs_set_file_extent_compression(leaf, fi, 0);
 661         btrfs_set_file_extent_encryption(leaf, fi, 0);
 662         btrfs_set_file_extent_other_encoding(leaf, fi, 0);
 663         btrfs_mark_buffer_dirty(leaf);
 664
 665         btrfs_release_path(root, &path);
 666
 667         ins_key.objectid = disk_bytenr;
 668         ins_key.offset = num_bytes;
 669         ins_key.type = BTRFS_EXTENT_ITEM_KEY;
 670
 671         ret = btrfs_insert_empty_item(trans, extent_root, &path,
 672                                 &ins_key, sizeof(*ei));
 673         if (ret == 0) {
 674                 leaf = path.nodes[0];
 675                 ei = btrfs_item_ptr(leaf, path.slots[0],
 676                                     struct btrfs_extent_item);
 677
 678                 btrfs_set_extent_refs(leaf, ei, 0);
 679                 btrfs_set_extent_generation(leaf, ei, trans->transid);
 680                 btrfs_set_extent_flags(leaf, ei, BTRFS_EXTENT_FLAG_DATA);
 681
 682                 btrfs_mark_buffer_dirty(leaf);
 683                 ret = btrfs_update_block_group(trans, root, disk_bytenr,
 684                                                num_bytes, 1, 0);
 685                 if (ret)
 686                         goto fail;
 687         } else if (ret != -EEXIST) {
 688                 goto fail;
 689         }
 690
 691         ret = btrfs_inc_extent_ref(trans, root, disk_bytenr, num_bytes, 0,
 692                                    root->root_key.objectid,
 693                                    objectid, 0);
 694 fail:
 695         btrfs_release_path(root, &path);
 696         return ret;
 697 }
 698
 699 static int add_symbolic_link(struct btrfs_trans_handle *trans,
 700                              struct btrfs_root *root,
 701                              u64 objectid, const char *path_name)
 702 {
 703         int ret;
 704         u64 sectorsize = root->sectorsize;
 705         char *buf = malloc(sectorsize);
 706
 707         ret = readlink(path_name, buf, sectorsize);
 708         if (ret <= 0) {
 709                 fprintf(stderr, "readlink failed for %s\n", path_name);
 710                 goto fail;
 711         }
 712         if (ret >= sectorsize) {
 713                 fprintf(stderr, "symlink too long for %s", path_name);
 714                 ret = -1;
 715                 goto fail;
 716         }
 717
 718         buf[ret] = '\0'; /* readlink does not do it for us */
 719         ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
 720                                          buf, ret + 1);
 721 fail:
 722         free(buf);
 723         return ret;
 724 }
 725
 726 static int add_file_items(struct btrfs_trans_handle *trans,
 727                           struct btrfs_root *root,
 728                           struct btrfs_inode_item *btrfs_inode, u64 objectid,
 729                           ino_t parent_inum, struct stat *st,
 730                           const char *path_name, int out_fd)
 731 {
 732         int ret;
 733         ssize_t ret_read;
 734         u64 bytes_read = 0;
 735         char *buffer = NULL;
 736         struct btrfs_key key;
 737         int blocks;
 738         u32 sectorsize = root->sectorsize;
 739         u64 first_block = 0;
 740         u64 num_blocks = 0;
 741         int fd;
 742
 743         fd = open(path_name, O_RDONLY);
 744         if (fd == -1) {
 745                 fprintf(stderr, "%s open failed\n", path_name);
 746                 goto end;
 747         }
 748
 749         blocks = st->st_size / sectorsize;
 750         if (st->st_size % sectorsize)
 751                 blocks += 1;
 752
 753         if (st->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root)) {
 754                 buffer = malloc(st->st_size);
 755                 ret_read = pread64(fd, buffer, st->st_size, bytes_read);
 756                 if (ret_read == -1) {
 757                         fprintf(stderr, "%s read failed\n", path_name);
 758                         goto end;
 759                 }
 760
 761                 ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
 762                                                  buffer, st->st_size);
 763                 goto end;
 764         }
 765
 766         ret = custom_alloc_extent(root, blocks * sectorsize, 0, &key);
 767         if (ret)
 768                 goto end;
 769
 770         first_block = key.objectid;
 771         bytes_read = 0;
 772         buffer = malloc(sectorsize);
 773
 774         do {
 775                 memset(buffer, 0, sectorsize);
 776                 ret_read = pread64(fd, buffer, sectorsize, bytes_read);
 777                 if (ret_read == -1) {
 778                         fprintf(stderr, "%s read failed\n", path_name);
 779                         goto end;
 780                 }
 781
 782                 ret = pwrite64(out_fd, buffer, sectorsize,
 783                                first_block + bytes_read);
 784                 if (ret != sectorsize) {
 785                         fprintf(stderr, "output file write failed\n");
 786                         goto end;
 787                 }
 788
 789                 /* checksum for file data */
 790                 ret = btrfs_csum_file_block(trans, root->fs_info->csum_root,
 791                                 first_block + (blocks * sectorsize),
 792                                 first_block + bytes_read,
 793                                 buffer, sectorsize);
 794                 if (ret) {
 795                         fprintf(stderr, "%s checksum failed\n", path_name);
 796                         goto end;
 797                 }
 798
 799                 bytes_read += ret_read;
 800                 num_blocks++;
 801         } while (ret_read == sectorsize);
 802
 803         if (num_blocks > 0) {
 804                 ret = record_file_extent(trans, root, objectid, btrfs_inode,
 805                                          first_block, first_block,
 806                                          blocks * sectorsize);
 807                 if (ret)
 808                         goto end;
 809         }
 810
 811 end:
 812         if (buffer)
 813                 free(buffer);
 814         close(fd);
 815         return ret;
 816 }
 817
 818 static char *make_path(char *dir, char *name)
 819 {
 820         char *path;
 821
 822         path = malloc(strlen(dir) + strlen(name) + 2);
 823         if (!path)
 824                 return NULL;
 825         strcpy(path, dir);
 826         if (dir[strlen(dir) - 1] != '/')
 827                 strcat(path, "/");
 828         strcat(path, name);
 829         return path;
 830 }
 831
 832 static int traverse_directory(struct btrfs_trans_handle *trans,
 833                               struct btrfs_root *root, char *dir_name,
 834                               struct directory_name_entry *dir_head, int out_fd)
 835 {
 836         int ret = 0;
 837
 838         struct btrfs_inode_item cur_inode;
 839         struct btrfs_inode_item *inode_item;
 840         int count, i, dir_index_cnt;
 841         struct direct **files;
 842         struct stat st;
 843         struct directory_name_entry *dir_entry, *parent_dir_entry;
 844         struct direct *cur_file;
 845         ino_t parent_inum, cur_inum;
 846         ino_t highest_inum = 0;
 847         char *parent_dir_name;
 848         struct btrfs_path path;
 849         struct extent_buffer *leaf;
 850         struct btrfs_key root_dir_key;
 851         u64 root_dir_inode_size = 0;
 852
 853         /* Add list for source directory */
 854         dir_entry = malloc(sizeof(struct directory_name_entry));
 855         dir_entry->dir_name = dir_name;
 856         dir_entry->path = malloc(strlen(dir_name) + 1);
 857         strcpy(dir_entry->path, dir_name);
 858
 859         parent_inum = highest_inum + BTRFS_FIRST_FREE_OBJECTID;
 860         dir_entry->inum = parent_inum;
 861         list_add_tail(&dir_entry->list, &dir_head->list);
 862
 863         btrfs_init_path(&path);
 864
 865         root_dir_key.objectid = btrfs_root_dirid(&root->root_item);
 866         root_dir_key.offset = 0;
 867         btrfs_set_key_type(&root_dir_key, BTRFS_INODE_ITEM_KEY);
 868         ret = btrfs_lookup_inode(trans, root, &path, &root_dir_key, 1);
 869         if (ret) {
 870                 fprintf(stderr, "root dir lookup error\n");
 871                 goto fail;
 872         }
 873
 874         leaf = path.nodes[0];
 875         inode_item = btrfs_item_ptr(leaf, path.slots[0],
 876                                     struct btrfs_inode_item);
 877
 878         root_dir_inode_size = calculate_dir_inode_size(dir_name);
 879         btrfs_set_inode_size(leaf, inode_item, root_dir_inode_size);
 880         btrfs_mark_buffer_dirty(leaf);
 881
 882         btrfs_release_path(root, &path);
 883
 884         do {
 885                 parent_dir_entry = list_entry(dir_head->list.next,
 886                                               struct directory_name_entry,
 887                                               list);
 888                 list_del(&parent_dir_entry->list);
 889
 890                 parent_inum = parent_dir_entry->inum;
 891                 parent_dir_name = parent_dir_entry->dir_name;
 892                 if (chdir(parent_dir_entry->path)) {
 893                         fprintf(stderr, "chdir error for %s\n",
 894                                 parent_dir_name);
 895                         goto fail;
 896                 }
 897
 898                 count = scandir(parent_dir_entry->path, &files,
 899                                 directory_select, NULL);
 900                 if (count == -1)
 901                 {
 902                         fprintf(stderr, "scandir for %s failed: %s\n",
 903                                 parent_dir_name, strerror (errno));
 904                         goto fail;
 905                 }
 906
 907                 for (i = 0; i < count; i++) {
 908                         cur_file = files[i];
 909
 910                         if (lstat(cur_file->d_name, &st) == -1) {
 911                                 fprintf(stderr, "lstat failed for file %s\n",
 912                                         cur_file->d_name);
 913                                 goto fail;
 914                         }
 915
 916                         cur_inum = ++highest_inum + BTRFS_FIRST_FREE_OBJECTID;
 917                         ret = add_directory_items(trans, root,
 918                                                   cur_inum, parent_inum,
 919                                                   cur_file->d_name,
 920                                                   &st, &dir_index_cnt);
 921                         if (ret) {
 922                                 fprintf(stderr, "add_directory_items failed\n");
 923                                 goto fail;
 924                         }
 925
 926                         ret = add_inode_items(trans, root, &st,
 927                                               cur_file->d_name, cur_inum,
 928                                               parent_inum, dir_index_cnt,
 929                                               &cur_inode);
 930                         if (ret) {
 931                                 fprintf(stderr, "add_inode_items failed\n");
 932                                 goto fail;
 933                         }
 934
 935                         ret = add_xattr_item(trans, root,
 936                                              cur_inum, cur_file->d_name);
 937                         if (ret) {
 938                                 fprintf(stderr, "add_xattr_item failed\n");
 939                                 goto fail;
 940                         }
 941
 942                         if (S_ISDIR(st.st_mode)) {
 943                                 dir_entry = malloc(sizeof(struct directory_name_entry));
 944                                 dir_entry->dir_name = cur_file->d_name;
 945                                 dir_entry->path = make_path(parent_dir_entry->path,
 946                                                             cur_file->d_name);
 947                                 dir_entry->inum = cur_inum;
 948                                 list_add_tail(&dir_entry->list, &dir_head->list);
 949                         } else if (S_ISREG(st.st_mode)) {
 950                                 ret = add_file_items(trans, root, &cur_inode,
 951                                                      cur_inum, parent_inum, &st,
 952                                                      cur_file->d_name, out_fd);
 953                                 if (ret) {
 954                                         fprintf(stderr, "add_file_items failed\n");
 955                                         goto fail;
 956                                 }
 957                         } else if (S_ISLNK(st.st_mode)) {
 958                                 ret = add_symbolic_link(trans, root,
 959                                                         cur_inum, cur_file->d_name);
 960                                 if (ret) {
 961                                         fprintf(stderr, "add_symbolic_link failed\n");
 962                                         goto fail;
 963                                 }
 964                         }
 965                 }
 966
 967                 free(parent_dir_entry->path);
 968                 free(parent_dir_entry);
 969
 970                 index_cnt = 2;
 971
 972         } while (!list_empty(&dir_head->list));
 973
 974         return 0;
 975 fail:
 976         free(parent_dir_entry->path);
 977         free(parent_dir_entry);
 978         return -1;
 979 }
 980
 981 static int open_target(char *output_name)
 982 {
 983         int output_fd;
 984         output_fd = open(output_name, O_CREAT | O_RDWR | O_TRUNC,
 985                          S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
 986
 987         return output_fd;
 988 }
 989
 990 static int create_chunks(struct btrfs_trans_handle *trans,
 991                          struct btrfs_root *root, u64 num_of_meta_chunks,
 992                          u64 size_of_data)
 993 {
 994         u64 chunk_start;
 995         u64 chunk_size;
 996         u64 meta_type = BTRFS_BLOCK_GROUP_METADATA;
 997         u64 data_type = BTRFS_BLOCK_GROUP_DATA;
 998         u64 minimum_data_chunk_size = 64 * 1024 * 1024;
 999         u64 i;
1000         int ret;
1001
1002         for (i = 0; i < num_of_meta_chunks; i++) {
1003                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
1004                                         &chunk_start, &chunk_size, meta_type);
1005                 BUG_ON(ret);
1006                 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1007                                              meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1008                                              chunk_start, chunk_size);
1009                 BUG_ON(ret);
1010                 set_extent_dirty(&root->fs_info->free_space_cache,
1011                                  chunk_start, chunk_start + chunk_size - 1, 0);
1012         }
1013
1014         if (size_of_data < minimum_data_chunk_size)
1015                 size_of_data = minimum_data_chunk_size;
1016         ret = btrfs_alloc_data_chunk(trans, root->fs_info->extent_root,
1017                                      &chunk_start, size_of_data, data_type);
1018         BUG_ON(ret);
1019         ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1020                                      data_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1021                                      chunk_start, size_of_data);
1022         BUG_ON(ret);
1023         set_extent_dirty(&root->fs_info->free_space_cache,
1024                          chunk_start, chunk_start + size_of_data - 1, 0);
1025         return ret;
1026 }
1027
1028 static int make_image(char *source_dir, struct btrfs_root *root, int out_fd)
1029 {
1030         int ret;
1031         struct btrfs_trans_handle *trans;
1032
1033         struct stat root_st;
1034         int root_len;
1035
1036         struct directory_name_entry dir_head;
1037
1038         ret = lstat(source_dir, &root_st);
1039         if (ret) {
1040                 fprintf(stderr, "unable to lstat the %s\n", source_dir);
1041                 goto fail;
1042         }
1043
1044         root_len = strlen(source_dir);
1045
1046         INIT_LIST_HEAD(&dir_head.list);
1047
1048         trans = btrfs_start_transaction(root, 1);
1049         ret = traverse_directory(trans, root, source_dir, &dir_head, out_fd);
1050         if (ret) {
1051                 fprintf(stderr, "unable to traverse_directory\n");
1052                 goto fail;
1053         }
1054         btrfs_commit_transaction(trans, root);
1055
1056         printf("Making image is completed.\n");
1057         return 0;
1058 fail:
1059         fprintf(stderr, "Making image is aborted.\n");
1060         return -1;
1061 }
1062
1063 static u64 size_sourcedir(char *dir_name, u64 sectorsize,
1064                           u64 *num_of_meta_chunks_ret, u64 *size_of_data_ret)
1065 {
1066         u64 dir_size = 0;
1067         u64 total_size = 0;
1068         int ret;
1069         char command[1024];
1070         char path[512];
1071         char *file_name = "temp_file";
1072         FILE *file;
1073         u64 minimum_data_size = 256 * 1024 * 1024;      /* 256MB */
1074         u64 default_chunk_size = 8 * 1024 * 1024;       /* 8MB */
1075         u64 allocated_meta_size = 8 * 1024 * 1024;      /* 8MB */
1076         u64 allocated_total_size = 20 * 1024 * 1024;    /* 20MB */
1077         u64 num_of_meta_chunks = 0;
1078         u64 num_of_allocated_meta_chunks =
1079                         allocated_meta_size / default_chunk_size;
1080
1081         ret = sprintf(command, "du -B 4096 -s ");
1082         if (ret < 0) {
1083                 fprintf(stderr, "error executing sprintf for du command\n");
1084                 return -1;
1085         }
1086         strcat(command, dir_name);
1087         strcat(command, " > ");
1088         strcat(command, file_name);
1089         ret = system(command);
1090
1091         file = fopen(file_name, "r");
1092         ret = fscanf(file, "%lld %s\n", &dir_size, path);
1093         fclose(file);
1094         remove(file_name);
1095
1096         dir_size *= sectorsize;
1097         *size_of_data_ret = dir_size;
1098
1099         num_of_meta_chunks = (dir_size / 2) / default_chunk_size;
1100         if (((dir_size / 2) % default_chunk_size) != 0)
1101                 num_of_meta_chunks++;
1102         if (num_of_meta_chunks <= num_of_allocated_meta_chunks)
1103                 num_of_meta_chunks = 0;
1104         else
1105                 num_of_meta_chunks -= num_of_allocated_meta_chunks;
1106
1107         total_size = allocated_total_size + dir_size +
1108                      (num_of_meta_chunks * default_chunk_size);
1109
1110         *num_of_meta_chunks_ret = num_of_meta_chunks;
1111
1112         if (total_size < minimum_data_size)
1113                 total_size = minimum_data_size;
1114
1115         return total_size;
1116 }
1117
1118 static int zero_output_file(int out_fd, u64 size, u32 sectorsize)
1119 {
1120         int len = sectorsize;
1121         int loop_num = size / sectorsize;
1122         u64 location = 0;
1123         char *buf = malloc(len);
1124         int ret = 0, i;
1125         ssize_t written;
1126
1127         if (!buf)
1128                 return -ENOMEM;
1129         memset(buf, 0, len);
1130         for (i = 0; i < loop_num; i++) {
1131                 written = pwrite64(out_fd, buf, len, location);
1132                 if (written != len)
1133                         ret = -EIO;
1134                 location += sectorsize;
1135         }
1136         free(buf);
1137         return ret;
1138 }
1139
1140 int main(int ac, char **av)
1141 {
1142         char *file;
1143         struct btrfs_root *root;
1144         struct btrfs_trans_handle *trans;
1145         char *label = NULL;
1146         char *first_file;
1147         u64 block_count = 0;
1148         u64 dev_block_count = 0;
1149         u64 blocks[7];
1150         u64 alloc_start = 0;
1151         u64 metadata_profile = BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_DUP;
1152         u64 data_profile = BTRFS_BLOCK_GROUP_RAID0;
1153         u32 leafsize = getpagesize();
1154         u32 sectorsize = 4096;
1155         u32 nodesize = leafsize;
1156         u32 stripesize = 4096;
1157         int zero_end = 1;
1158         int option_index = 0;
1159         int fd;
1160         int ret;
1161         int i;
1162         int mixed = 0;
1163         int data_profile_opt = 0;
1164         int metadata_profile_opt = 0;
1165
1166         char *source_dir = NULL;
1167         int source_dir_set = 0;
1168         char *output = "output.img";
1169         u64 num_of_meta_chunks = 0;
1170         u64 size_of_data = 0;
1171
1172         while(1) {
1173                 int c;
1174                 c = getopt_long(ac, av, "A:b:l:n:s:m:d:L:r:VM", long_options,
1175                                 &option_index);
1176                 if (c < 0)
1177                         break;
1178                 switch(c) {
1179                         case 'A':
1180                                 alloc_start = parse_size(optarg);
1181                                 break;
1182                         case 'd':
1183                                 data_profile = parse_profile(optarg);
1184                                 data_profile_opt = 1;
1185                                 break;
1186                         case 'l':
1187                                 leafsize = parse_size(optarg);
1188                                 break;
1189                         case 'L':
1190                                 label = parse_label(optarg);
1191                                 break;
1192                         case 'm':
1193                                 metadata_profile = parse_profile(optarg);
1194                                 metadata_profile_opt = 1;
1195                                 break;
1196                         case 'M':
1197                                 mixed = 1;
1198                                 break;
1199                         case 'n':
1200                                 nodesize = parse_size(optarg);
1201                                 break;
1202                         case 's':
1203                                 sectorsize = parse_size(optarg);
1204                                 break;
1205                         case 'b':
1206                                 block_count = parse_size(optarg);
1207                                 if (block_count <= 1024*1024*1024) {
1208                                         printf("SMALL VOLUME: forcing mixed "
1209                                                "metadata/data groups\n");
1210                                         mixed = 1;
1211                                 }
1212                                 zero_end = 0;
1213                                 break;
1214                         case 'V':
1215                                 print_version();
1216                                 break;
1217                         case 'r':
1218                                 source_dir = optarg;
1219                                 source_dir_set = 1;
1220                                 break;
1221                         default:
1222                                 print_usage();
1223                 }
1224         }
1225         sectorsize = max(sectorsize, (u32)getpagesize());
1226         if (leafsize < sectorsize || (leafsize & (sectorsize - 1))) {
1227                 fprintf(stderr, "Illegal leafsize %u\n", leafsize);
1228                 exit(1);
1229         }
1230         if (nodesize < sectorsize || (nodesize & (sectorsize - 1))) {
1231                 fprintf(stderr, "Illegal nodesize %u\n", nodesize);
1232                 exit(1);
1233         }
1234         if (source_dir_set)
1235                 ac++;
1236         ac = ac - optind;
1237         if (ac == 0)
1238                 print_usage();
1239
1240         printf("\nWARNING! - %s IS EXPERIMENTAL\n", BTRFS_BUILD_VERSION);
1241         printf("WARNING! - see http://btrfs.wiki.kernel.org before using\n\n");
1242
1243         if (source_dir == 0) {
1244                 file = av[optind++];
1245                 ret = check_mounted(file);
1246                 if (ret < 0) {
1247                         fprintf(stderr, "error checking %s mount status\n", file);
1248                         exit(1);
1249                 }
1250                 if (ret == 1) {
1251                         fprintf(stderr, "%s is mounted\n", file);
1252                         exit(1);
1253                 }
1254                 ac--;
1255                 fd = open(file, O_RDWR);
1256                 if (fd < 0) {
1257                         fprintf(stderr, "unable to open %s\n", file);
1258                         exit(1);
1259                 }
1260                 first_file = file;
1261                 ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count, &mixed);
1262                 if (block_count == 0)
1263                         block_count = dev_block_count;
1264         } else {
1265                 ac = 0;
1266                 fd = open_target(output);
1267                 if (fd < 0) {
1268                         fprintf(stderr, "unable to open the %s\n", file);
1269                         exit(1);
1270                 }
1271
1272                 file = output;
1273                 first_file = file;
1274                 block_count = size_sourcedir(source_dir, sectorsize,
1275                                              &num_of_meta_chunks, &size_of_data);
1276                 ret = zero_output_file(fd, block_count, sectorsize);
1277                 if (ret) {
1278                         fprintf(stderr, "unable to zero the output file\n");
1279                         exit(1);
1280                 }
1281         }
1282         if (mixed) {
1283                 if (!metadata_profile_opt)
1284                         metadata_profile = 0;
1285                 if (!data_profile_opt)
1286                         data_profile = 0;
1287
1288                 if (metadata_profile != data_profile) {
1289                         fprintf(stderr, "With mixed block groups data and metadata "
1290                                 "profiles must be the same\n");
1291                         exit(1);
1292                 }
1293         }
1294
1295         blocks[0] = BTRFS_SUPER_INFO_OFFSET;
1296         for (i = 1; i < 7; i++) {
1297                 blocks[i] = BTRFS_SUPER_INFO_OFFSET + 1024 * 1024 +
1298                         leafsize * i;
1299         }
1300
1301         ret = make_btrfs(fd, file, label, blocks, block_count,
1302                          nodesize, leafsize,
1303                          sectorsize, stripesize);
1304         if (ret) {
1305                 fprintf(stderr, "error during mkfs %d\n", ret);
1306                 exit(1);
1307         }
1308         root = open_ctree(file, 0, O_RDWR);
1309         root->fs_info->alloc_start = alloc_start;
1310
1311         ret = make_root_dir(root, mixed);
1312         if (ret) {
1313                 fprintf(stderr, "failed to setup the root directory\n");
1314                 exit(1);
1315         }
1316
1317         trans = btrfs_start_transaction(root, 1);
1318
1319         if (ac == 0)
1320                 goto raid_groups;
1321
1322         btrfs_register_one_device(file);
1323         if (!root) {
1324                 fprintf(stderr, "ctree init failed\n");
1325                 return -1;
1326         }
1327
1328         zero_end = 1;
1329         while(ac-- > 0) {
1330                 int old_mixed = mixed;
1331
1332                 file = av[optind++];
1333                 ret = check_mounted(file);
1334                 if (ret < 0) {
1335                         fprintf(stderr, "error checking %s mount status\n",
1336                                 file);
1337                         exit(1);
1338                 }
1339                 if (ret == 1) {
1340                         fprintf(stderr, "%s is mounted\n", file);
1341                         exit(1);
1342                 }
1343                 fd = open(file, O_RDWR);
1344                 if (fd < 0) {
1345                         fprintf(stderr, "unable to open %s\n", file);
1346                         exit(1);
1347                 }
1348                 ret = btrfs_device_already_in_root(root, fd,
1349                                                    BTRFS_SUPER_INFO_OFFSET);
1350                 if (ret) {
1351                         fprintf(stderr, "skipping duplicate device %s in FS\n",
1352                                 file);
1353                         close(fd);
1354                         continue;
1355                 }
1356                 ret = btrfs_prepare_device(fd, file, zero_end,
1357                                            &dev_block_count, &mixed);
1358                 mixed = old_mixed;
1359                 BUG_ON(ret);
1360
1361                 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
1362                                         sectorsize, sectorsize, sectorsize);
1363                 BUG_ON(ret);
1364                 btrfs_register_one_device(file);
1365         }
1366
1367 raid_groups:
1368         if (!source_dir_set) {
1369                 ret = create_raid_groups(trans, root, data_profile,
1370                                  metadata_profile, mixed);
1371                 BUG_ON(ret);
1372         }
1373
1374         ret = create_data_reloc_tree(trans, root);
1375         BUG_ON(ret);
1376
1377         if (mixed) {
1378                 struct btrfs_super_block *super = &root->fs_info->super_copy;
1379                 u64 flags = btrfs_super_incompat_flags(super);
1380
1381                 flags |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
1382                 btrfs_set_super_incompat_flags(super, flags);
1383         }
1384
1385         printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
1386             "sectorsize %u size %s\n",
1387             label, first_file, nodesize, leafsize, sectorsize,
1388             pretty_sizes(btrfs_super_total_bytes(&root->fs_info->super_copy)));
1389
1390         printf("%s\n", BTRFS_BUILD_VERSION);
1391         btrfs_commit_transaction(trans, root);
1392
1393         if (source_dir_set) {
1394                 trans = btrfs_start_transaction(root, 1);
1395                 ret = create_chunks(trans, root,
1396                                     num_of_meta_chunks, size_of_data);
1397                 BUG_ON(ret);
1398                 btrfs_commit_transaction(trans, root);
1399
1400                 ret = make_image(source_dir, root, fd);
1401                 BUG_ON(ret);
1402         }
1403
1404         ret = close_ctree(root);
1405         BUG_ON(ret);
1406
1407         free(label);
1408         return 0;
1409 }
1410