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                               int data_profile_opt, u64 metadata_profile,
 232                               int metadata_profile_opt, int mixed)
 233 {
 234         u64 num_devices = btrfs_super_num_devices(&root->fs_info->super_copy);
 235         u64 allowed;
 236         int ret;
 237
 238         /*
 239          * Set default profiles according to number of added devices.
 240          * For mixed groups defaults are single/single.
 241          */
 242         if (!metadata_profile_opt && !mixed) {
 243                 metadata_profile = (num_devices > 1) ?
 244                         BTRFS_BLOCK_GROUP_RAID1 : BTRFS_BLOCK_GROUP_DUP;
 245         }
 246         if (!data_profile_opt && !mixed) {
 247                 data_profile = (num_devices > 1) ?
 248                         BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */
 249         }
 250
 251         if (num_devices == 1)
 252                 allowed = BTRFS_BLOCK_GROUP_DUP;
 253         else if (num_devices >= 4) {
 254                 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
 255                         BTRFS_BLOCK_GROUP_RAID10;
 256         } else
 257                 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1;
 258
 259         if (metadata_profile & ~allowed) {
 260                 fprintf(stderr, "unable to create FS with metadata "
 261                         "profile %llu (%llu devices)\n", metadata_profile,
 262                         num_devices);
 263                 exit(1);
 264         }
 265         if (data_profile & ~allowed) {
 266                 fprintf(stderr, "unable to create FS with data "
 267                         "profile %llu (%llu devices)\n", data_profile,
 268                         num_devices);
 269                 exit(1);
 270         }
 271
 272         if (allowed & metadata_profile) {
 273                 u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA;
 274
 275                 ret = create_one_raid_group(trans, root,
 276                                             BTRFS_BLOCK_GROUP_SYSTEM |
 277                                             (allowed & metadata_profile));
 278                 BUG_ON(ret);
 279
 280                 if (mixed)
 281                         meta_flags |= BTRFS_BLOCK_GROUP_DATA;
 282
 283                 ret = create_one_raid_group(trans, root, meta_flags |
 284                                             (allowed & metadata_profile));
 285                 BUG_ON(ret);
 286
 287                 ret = recow_roots(trans, root);
 288                 BUG_ON(ret);
 289         }
 290         if (!mixed && num_devices > 1 && (allowed & data_profile)) {
 291                 ret = create_one_raid_group(trans, root,
 292                                             BTRFS_BLOCK_GROUP_DATA |
 293                                             (allowed & data_profile));
 294                 BUG_ON(ret);
 295         }
 296         return 0;
 297 }
 298
 299 static int create_data_reloc_tree(struct btrfs_trans_handle *trans,
 300                                   struct btrfs_root *root)
 301 {
 302         struct btrfs_key location;
 303         struct btrfs_root_item root_item;
 304         struct extent_buffer *tmp;
 305         u64 objectid = BTRFS_DATA_RELOC_TREE_OBJECTID;
 306         int ret;
 307
 308         ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
 309         BUG_ON(ret);
 310
 311         memcpy(&root_item, &root->root_item, sizeof(root_item));
 312         btrfs_set_root_bytenr(&root_item, tmp->start);
 313         btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
 314         btrfs_set_root_generation(&root_item, trans->transid);
 315         free_extent_buffer(tmp);
 316
 317         location.objectid = objectid;
 318         location.type = BTRFS_ROOT_ITEM_KEY;
 319         location.offset = 0;
 320         ret = btrfs_insert_root(trans, root->fs_info->tree_root,
 321                                 &location, &root_item);
 322         BUG_ON(ret);
 323         return 0;
 324 }
 325
 326 static void print_usage(void)
 327 {
 328         fprintf(stderr, "usage: mkfs.btrfs [options] dev [ dev ... ]\n");
 329         fprintf(stderr, "options:\n");
 330         fprintf(stderr, "\t -A --alloc-start the offset to start the FS\n");
 331         fprintf(stderr, "\t -b --byte-count total number of bytes in the FS\n");
 332         fprintf(stderr, "\t -d --data data profile, raid0, raid1, raid10 or single\n");
 333         fprintf(stderr, "\t -l --leafsize size of btree leaves\n");
 334         fprintf(stderr, "\t -L --label set a label\n");
 335         fprintf(stderr, "\t -m --metadata metadata profile, values like data profile\n");
 336         fprintf(stderr, "\t -M --mixed mix metadata and data together\n");
 337         fprintf(stderr, "\t -n --nodesize size of btree nodes\n");
 338         fprintf(stderr, "\t -s --sectorsize min block allocation\n");
 339         fprintf(stderr, "\t -r --rootdir the source directory\n");
 340         fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
 341         exit(1);
 342 }
 343
 344 static void print_version(void)
 345 {
 346         fprintf(stderr, "mkfs.btrfs, part of %s\n", BTRFS_BUILD_VERSION);
 347         exit(0);
 348 }
 349
 350 static u64 parse_profile(char *s)
 351 {
 352         if (strcmp(s, "raid0") == 0) {
 353                 return BTRFS_BLOCK_GROUP_RAID0;
 354         } else if (strcmp(s, "raid1") == 0) {
 355                 return BTRFS_BLOCK_GROUP_RAID1;
 356         } else if (strcmp(s, "raid10") == 0) {
 357                 return BTRFS_BLOCK_GROUP_RAID10;
 358         } else if (strcmp(s, "single") == 0) {
 359                 return 0;
 360         } else {
 361                 fprintf(stderr, "Unknown option %s\n", s);
 362                 print_usage();
 363         }
 364         /* not reached */
 365         return 0;
 366 }
 367
 368 static char *parse_label(char *input)
 369 {
 370         int i;
 371         int len = strlen(input);
 372
 373         if (len >= BTRFS_LABEL_SIZE) {
 374                 fprintf(stderr, "Label %s is too long (max %d)\n", input,
 375                         BTRFS_LABEL_SIZE - 1);
 376                 exit(1);
 377         }
 378         for (i = 0; i < len; i++) {
 379                 if (input[i] == '/' || input[i] == '\\') {
 380                         fprintf(stderr, "invalid label %s\n", input);
 381                         exit(1);
 382                 }
 383         }
 384         return strdup(input);
 385 }
 386
 387 static struct option long_options[] = {
 388         { "alloc-start", 1, NULL, 'A'},
 389         { "byte-count", 1, NULL, 'b' },
 390         { "leafsize", 1, NULL, 'l' },
 391         { "label", 1, NULL, 'L'},
 392         { "metadata", 1, NULL, 'm' },
 393         { "mixed", 0, NULL, 'M' },
 394         { "nodesize", 1, NULL, 'n' },
 395         { "sectorsize", 1, NULL, 's' },
 396         { "data", 1, NULL, 'd' },
 397         { "version", 0, NULL, 'V' },
 398         { "rootdir", 1, NULL, 'r' },
 399         { 0, 0, 0, 0}
 400 };
 401
 402 static int add_directory_items(struct btrfs_trans_handle *trans,
 403                                struct btrfs_root *root, u64 objectid,
 404                                ino_t parent_inum, const char *name,
 405                                struct stat *st, int *dir_index_cnt)
 406 {
 407         int ret;
 408         int name_len;
 409         struct btrfs_key location;
 410         u8 filetype = 0;
 411
 412         name_len = strlen(name);
 413
 414         location.objectid = objectid;
 415         location.offset = 0;
 416         btrfs_set_key_type(&location, BTRFS_INODE_ITEM_KEY);
 417
 418         if (S_ISDIR(st->st_mode))
 419                 filetype = BTRFS_FT_DIR;
 420         if (S_ISREG(st->st_mode))
 421                 filetype = BTRFS_FT_REG_FILE;
 422         if (S_ISLNK(st->st_mode))
 423                 filetype = BTRFS_FT_SYMLINK;
 424
 425         ret = btrfs_insert_dir_item(trans, root, name, name_len,
 426                                     parent_inum, &location,
 427                                     filetype, index_cnt);
 428
 429         *dir_index_cnt = index_cnt;
 430         index_cnt++;
 431
 432         return ret;
 433 }
 434
 435 static int fill_inode_item(struct btrfs_trans_handle *trans,
 436                            struct btrfs_root *root,
 437                            struct btrfs_inode_item *dst, struct stat *src)
 438 {
 439         u64 blocks = 0;
 440         u64 sectorsize = root->sectorsize;
 441
 442         /*
 443          * btrfs_inode_item has some reserved fields
 444          * and represents on-disk inode entry, so
 445          * zero everything to prevent information leak
 446          */
 447         memset(dst, 0, sizeof (*dst));
 448
 449         btrfs_set_stack_inode_generation(dst, trans->transid);
 450         btrfs_set_stack_inode_size(dst, src->st_size);
 451         btrfs_set_stack_inode_nbytes(dst, 0);
 452         btrfs_set_stack_inode_block_group(dst, 0);
 453         btrfs_set_stack_inode_nlink(dst, src->st_nlink);
 454         btrfs_set_stack_inode_uid(dst, src->st_uid);
 455         btrfs_set_stack_inode_gid(dst, src->st_gid);
 456         btrfs_set_stack_inode_mode(dst, src->st_mode);
 457         btrfs_set_stack_inode_rdev(dst, 0);
 458         btrfs_set_stack_inode_flags(dst, 0);
 459         btrfs_set_stack_timespec_sec(&dst->atime, src->st_atime);
 460         btrfs_set_stack_timespec_nsec(&dst->atime, 0);
 461         btrfs_set_stack_timespec_sec(&dst->ctime, src->st_ctime);
 462         btrfs_set_stack_timespec_nsec(&dst->ctime, 0);
 463         btrfs_set_stack_timespec_sec(&dst->mtime, src->st_mtime);
 464         btrfs_set_stack_timespec_nsec(&dst->mtime, 0);
 465         btrfs_set_stack_timespec_sec(&dst->otime, 0);
 466         btrfs_set_stack_timespec_nsec(&dst->otime, 0);
 467
 468         if (S_ISDIR(src->st_mode)) {
 469                 btrfs_set_stack_inode_size(dst, 0);
 470                 btrfs_set_stack_inode_nlink(dst, 1);
 471         }
 472         if (S_ISREG(src->st_mode)) {
 473                 btrfs_set_stack_inode_size(dst, (u64)src->st_size);
 474                 if (src->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root))
 475                         btrfs_set_stack_inode_nbytes(dst, src->st_size);
 476                 else {
 477                         blocks = src->st_size / sectorsize;
 478                         if (src->st_size % sectorsize)
 479                                 blocks += 1;
 480                         blocks *= sectorsize;
 481                         btrfs_set_stack_inode_nbytes(dst, blocks);
 482                 }
 483         }
 484         if (S_ISLNK(src->st_mode))
 485                 btrfs_set_stack_inode_nbytes(dst, src->st_size + 1);
 486
 487         return 0;
 488 }
 489
 490 static int directory_select(const struct direct *entry)
 491 {
 492         if ((strncmp(entry->d_name, ".", entry->d_reclen) == 0) ||
 493                 (strncmp(entry->d_name, "..", entry->d_reclen) == 0))
 494                 return 0;
 495         else
 496                 return 1;
 497 }
 498
 499 static void free_namelist(struct direct **files, int count)
 500 {
 501         int i;
 502
 503         if (count < 0)
 504                 return;
 505
 506         for (i = 0; i < count; ++i)
 507                 free(files[i]);
 508         free(files);
 509 }
 510
 511 static u64 calculate_dir_inode_size(char *dirname)
 512 {
 513         int count, i;
 514         struct direct **files, *cur_file;
 515         u64 dir_inode_size = 0;
 516
 517         count = scandir(dirname, &files, directory_select, NULL);
 518
 519         for (i = 0; i < count; i++) {
 520                 cur_file = files[i];
 521                 dir_inode_size += strlen(cur_file->d_name);
 522         }
 523
 524         free_namelist(files, count);
 525
 526         dir_inode_size *= 2;
 527         return dir_inode_size;
 528 }
 529
 530 static int add_inode_items(struct btrfs_trans_handle *trans,
 531                            struct btrfs_root *root,
 532                            struct stat *st, char *name,
 533                            u64 self_objectid, ino_t parent_inum,
 534                            int dir_index_cnt, struct btrfs_inode_item *inode_ret)
 535 {
 536         int ret;
 537         struct btrfs_key inode_key;
 538         struct btrfs_inode_item btrfs_inode;
 539         u64 objectid;
 540         u64 inode_size = 0;
 541         int name_len;
 542
 543         name_len = strlen(name);
 544         fill_inode_item(trans, root, &btrfs_inode, st);
 545         objectid = self_objectid;
 546
 547         if (S_ISDIR(st->st_mode)) {
 548                 inode_size = calculate_dir_inode_size(name);
 549                 btrfs_set_stack_inode_size(&btrfs_inode, inode_size);
 550         }
 551
 552         inode_key.objectid = objectid;
 553         inode_key.offset = 0;
 554         btrfs_set_key_type(&inode_key, BTRFS_INODE_ITEM_KEY);
 555
 556         ret = btrfs_insert_inode(trans, root, objectid, &btrfs_inode);
 557         if (ret)
 558                 goto fail;
 559
 560         ret = btrfs_insert_inode_ref(trans, root, name, name_len,
 561                                      objectid, parent_inum, dir_index_cnt);
 562         if (ret)
 563                 goto fail;
 564
 565         *inode_ret = btrfs_inode;
 566 fail:
 567         return ret;
 568 }
 569
 570 static int add_xattr_item(struct btrfs_trans_handle *trans,
 571                           struct btrfs_root *root, u64 objectid,
 572                           const char *file_name)
 573 {
 574         int ret;
 575         int cur_name_len;
 576         char xattr_list[XATTR_LIST_MAX];
 577         char *cur_name;
 578         char cur_value[XATTR_SIZE_MAX];
 579         char delimiter = '\0';
 580         char *next_location = xattr_list;
 581
 582         ret = llistxattr(file_name, xattr_list, XATTR_LIST_MAX);
 583         if (ret < 0) {
 584                 if(errno == ENOTSUP)
 585                         return 0;
 586                 fprintf(stderr, "get a list of xattr failed for %s\n",
 587                         file_name);
 588                 return ret;
 589         }
 590         if (ret == 0)
 591                 return ret;
 592
 593         cur_name = strtok(xattr_list, &delimiter);
 594         while (cur_name != NULL) {
 595                 cur_name_len = strlen(cur_name);
 596                 next_location += cur_name_len + 1;
 597
 598                 ret = getxattr(file_name, cur_name, cur_value, XATTR_SIZE_MAX);
 599                 if (ret < 0) {
 600                         if(errno == ENOTSUP)
 601                                 return 0;
 602                         fprintf(stderr, "get a xattr value failed for %s attr %s\n",
 603                                 file_name, cur_name);
 604                         return ret;
 605                 }
 606
 607                 ret = btrfs_insert_xattr_item(trans, root, cur_name,
 608                                               cur_name_len, cur_value,
 609                                               ret, objectid);
 610                 if (ret) {
 611                         fprintf(stderr, "insert a xattr item failed for %s\n",
 612                                 file_name);
 613                 }
 614
 615                 cur_name = strtok(next_location, &delimiter);
 616         }
 617
 618         return ret;
 619 }
 620 static int custom_alloc_extent(struct btrfs_root *root, u64 num_bytes,
 621                                u64 hint_byte, struct btrfs_key *ins)
 622 {
 623         u64 start;
 624         u64 end;
 625         u64 last = hint_byte;
 626         int ret;
 627         int wrapped = 0;
 628         struct btrfs_block_group_cache *cache;
 629
 630         while (1) {
 631                 ret = find_first_extent_bit(&root->fs_info->free_space_cache,
 632                                             last, &start, &end, EXTENT_DIRTY);
 633                 if (ret) {
 634                         if (wrapped++ == 0) {
 635                                 last = 0;
 636                                 continue;
 637                         } else {
 638                                 goto fail;
 639                         }
 640                 }
 641
 642                 start = max(last, start);
 643                 last = end + 1;
 644                 if (last - start < num_bytes)
 645                         continue;
 646
 647                 last = start + num_bytes;
 648                 if (test_range_bit(&root->fs_info->pinned_extents,
 649                                    start, last - 1, EXTENT_DIRTY, 0))
 650                         continue;
 651
 652                 cache = btrfs_lookup_block_group(root->fs_info, start);
 653                 BUG_ON(!cache);
 654                 if (cache->flags & BTRFS_BLOCK_GROUP_SYSTEM ||
 655                     last > cache->key.objectid + cache->key.offset) {
 656                         last = cache->key.objectid + cache->key.offset;
 657                         continue;
 658                 }
 659
 660                 if (cache->flags & (BTRFS_BLOCK_GROUP_SYSTEM |
 661                             BTRFS_BLOCK_GROUP_METADATA)) {
 662                         last = cache->key.objectid + cache->key.offset;
 663                         continue;
 664                 }
 665
 666                 clear_extent_dirty(&root->fs_info->free_space_cache,
 667                                    start, start + num_bytes - 1, 0);
 668
 669                 ins->objectid = start;
 670                 ins->offset = num_bytes;
 671                 ins->type = BTRFS_EXTENT_ITEM_KEY;
 672                 return 0;
 673         }
 674 fail:
 675         fprintf(stderr, "not enough free space\n");
 676         return -ENOSPC;
 677 }
 678
 679 static int record_file_extent(struct btrfs_trans_handle *trans,
 680                               struct btrfs_root *root, u64 objectid,
 681                               struct btrfs_inode_item *inode,
 682                               u64 file_pos, u64 disk_bytenr,
 683                               u64 num_bytes)
 684 {
 685         int ret;
 686         struct btrfs_fs_info *info = root->fs_info;
 687         struct btrfs_root *extent_root = info->extent_root;
 688         struct extent_buffer *leaf;
 689         struct btrfs_file_extent_item *fi;
 690         struct btrfs_key ins_key;
 691         struct btrfs_path path;
 692         struct btrfs_extent_item *ei;
 693
 694         btrfs_init_path(&path);
 695
 696         ins_key.objectid = objectid;
 697         ins_key.offset = 0;
 698         btrfs_set_key_type(&ins_key, BTRFS_EXTENT_DATA_KEY);
 699         ret = btrfs_insert_empty_item(trans, root, &path, &ins_key,
 700                                       sizeof(*fi));
 701         if (ret)
 702                 goto fail;
 703         leaf = path.nodes[0];
 704         fi = btrfs_item_ptr(leaf, path.slots[0],
 705                             struct btrfs_file_extent_item);
 706         btrfs_set_file_extent_generation(leaf, fi, trans->transid);
 707         btrfs_set_file_extent_type(leaf, fi, BTRFS_FILE_EXTENT_REG);
 708         btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
 709         btrfs_set_file_extent_disk_num_bytes(leaf, fi, num_bytes);
 710         btrfs_set_file_extent_offset(leaf, fi, 0);
 711         btrfs_set_file_extent_num_bytes(leaf, fi, num_bytes);
 712         btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes);
 713         btrfs_set_file_extent_compression(leaf, fi, 0);
 714         btrfs_set_file_extent_encryption(leaf, fi, 0);
 715         btrfs_set_file_extent_other_encoding(leaf, fi, 0);
 716         btrfs_mark_buffer_dirty(leaf);
 717
 718         btrfs_release_path(root, &path);
 719
 720         ins_key.objectid = disk_bytenr;
 721         ins_key.offset = num_bytes;
 722         ins_key.type = BTRFS_EXTENT_ITEM_KEY;
 723
 724         ret = btrfs_insert_empty_item(trans, extent_root, &path,
 725                                 &ins_key, sizeof(*ei));
 726         if (ret == 0) {
 727                 leaf = path.nodes[0];
 728                 ei = btrfs_item_ptr(leaf, path.slots[0],
 729                                     struct btrfs_extent_item);
 730
 731                 btrfs_set_extent_refs(leaf, ei, 0);
 732                 btrfs_set_extent_generation(leaf, ei, trans->transid);
 733                 btrfs_set_extent_flags(leaf, ei, BTRFS_EXTENT_FLAG_DATA);
 734
 735                 btrfs_mark_buffer_dirty(leaf);
 736                 ret = btrfs_update_block_group(trans, root, disk_bytenr,
 737                                                num_bytes, 1, 0);
 738                 if (ret)
 739                         goto fail;
 740         } else if (ret != -EEXIST) {
 741                 goto fail;
 742         }
 743
 744         ret = btrfs_inc_extent_ref(trans, root, disk_bytenr, num_bytes, 0,
 745                                    root->root_key.objectid,
 746                                    objectid, 0);
 747 fail:
 748         btrfs_release_path(root, &path);
 749         return ret;
 750 }
 751
 752 static int add_symbolic_link(struct btrfs_trans_handle *trans,
 753                              struct btrfs_root *root,
 754                              u64 objectid, const char *path_name)
 755 {
 756         int ret;
 757         u64 sectorsize = root->sectorsize;
 758         char *buf = malloc(sectorsize);
 759
 760         ret = readlink(path_name, buf, sectorsize);
 761         if (ret <= 0) {
 762                 fprintf(stderr, "readlink failed for %s\n", path_name);
 763                 goto fail;
 764         }
 765         if (ret >= sectorsize) {
 766                 fprintf(stderr, "symlink too long for %s", path_name);
 767                 ret = -1;
 768                 goto fail;
 769         }
 770
 771         buf[ret] = '\0'; /* readlink does not do it for us */
 772         ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
 773                                          buf, ret + 1);
 774 fail:
 775         free(buf);
 776         return ret;
 777 }
 778
 779 static int add_file_items(struct btrfs_trans_handle *trans,
 780                           struct btrfs_root *root,
 781                           struct btrfs_inode_item *btrfs_inode, u64 objectid,
 782                           ino_t parent_inum, struct stat *st,
 783                           const char *path_name, int out_fd)
 784 {
 785         int ret = -1;
 786         ssize_t ret_read;
 787         u64 bytes_read = 0;
 788         char *buffer = NULL;
 789         struct btrfs_key key;
 790         int blocks;
 791         u32 sectorsize = root->sectorsize;
 792         u64 first_block = 0;
 793         u64 num_blocks = 0;
 794         int fd;
 795
 796         fd = open(path_name, O_RDONLY);
 797         if (fd == -1) {
 798                 fprintf(stderr, "%s open failed\n", path_name);
 799                 goto end;
 800         }
 801
 802         blocks = st->st_size / sectorsize;
 803         if (st->st_size % sectorsize)
 804                 blocks += 1;
 805
 806         if (st->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root)) {
 807                 buffer = malloc(st->st_size);
 808                 ret_read = pread64(fd, buffer, st->st_size, bytes_read);
 809                 if (ret_read == -1) {
 810                         fprintf(stderr, "%s read failed\n", path_name);
 811                         goto end;
 812                 }
 813
 814                 ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
 815                                                  buffer, st->st_size);
 816                 goto end;
 817         }
 818
 819         ret = custom_alloc_extent(root, blocks * sectorsize, 0, &key);
 820         if (ret)
 821                 goto end;
 822
 823         first_block = key.objectid;
 824         bytes_read = 0;
 825         buffer = malloc(sectorsize);
 826
 827         do {
 828                 memset(buffer, 0, sectorsize);
 829                 ret_read = pread64(fd, buffer, sectorsize, bytes_read);
 830                 if (ret_read == -1) {
 831                         fprintf(stderr, "%s read failed\n", path_name);
 832                         goto end;
 833                 }
 834
 835                 ret = pwrite64(out_fd, buffer, sectorsize,
 836                                first_block + bytes_read);
 837                 if (ret != sectorsize) {
 838                         fprintf(stderr, "output file write failed\n");
 839                         goto end;
 840                 }
 841
 842                 /* checksum for file data */
 843                 ret = btrfs_csum_file_block(trans, root->fs_info->csum_root,
 844                                 first_block + (blocks * sectorsize),
 845                                 first_block + bytes_read,
 846                                 buffer, sectorsize);
 847                 if (ret) {
 848                         fprintf(stderr, "%s checksum failed\n", path_name);
 849                         goto end;
 850                 }
 851
 852                 bytes_read += ret_read;
 853                 num_blocks++;
 854         } while (ret_read == sectorsize);
 855
 856         if (num_blocks > 0) {
 857                 ret = record_file_extent(trans, root, objectid, btrfs_inode,
 858                                          first_block, first_block,
 859                                          blocks * sectorsize);
 860                 if (ret)
 861                         goto end;
 862         }
 863
 864 end:
 865         if (buffer)
 866                 free(buffer);
 867         close(fd);
 868         return ret;
 869 }
 870
 871 static char *make_path(char *dir, char *name)
 872 {
 873         char *path;
 874
 875         path = malloc(strlen(dir) + strlen(name) + 2);
 876         if (!path)
 877                 return NULL;
 878         strcpy(path, dir);
 879         if (dir[strlen(dir) - 1] != '/')
 880                 strcat(path, "/");
 881         strcat(path, name);
 882         return path;
 883 }
 884
 885 static int traverse_directory(struct btrfs_trans_handle *trans,
 886                               struct btrfs_root *root, char *dir_name,
 887                               struct directory_name_entry *dir_head, int out_fd)
 888 {
 889         int ret = 0;
 890
 891         struct btrfs_inode_item cur_inode;
 892         struct btrfs_inode_item *inode_item;
 893         int count, i, dir_index_cnt;
 894         struct direct **files;
 895         struct stat st;
 896         struct directory_name_entry *dir_entry, *parent_dir_entry;
 897         struct direct *cur_file;
 898         ino_t parent_inum, cur_inum;
 899         ino_t highest_inum = 0;
 900         char *parent_dir_name;
 901         struct btrfs_path path;
 902         struct extent_buffer *leaf;
 903         struct btrfs_key root_dir_key;
 904         u64 root_dir_inode_size = 0;
 905
 906         /* Add list for source directory */
 907         dir_entry = malloc(sizeof(struct directory_name_entry));
 908         dir_entry->dir_name = dir_name;
 909         dir_entry->path = malloc(strlen(dir_name) + 1);
 910         strcpy(dir_entry->path, dir_name);
 911
 912         parent_inum = highest_inum + BTRFS_FIRST_FREE_OBJECTID;
 913         dir_entry->inum = parent_inum;
 914         list_add_tail(&dir_entry->list, &dir_head->list);
 915
 916         btrfs_init_path(&path);
 917
 918         root_dir_key.objectid = btrfs_root_dirid(&root->root_item);
 919         root_dir_key.offset = 0;
 920         btrfs_set_key_type(&root_dir_key, BTRFS_INODE_ITEM_KEY);
 921         ret = btrfs_lookup_inode(trans, root, &path, &root_dir_key, 1);
 922         if (ret) {
 923                 fprintf(stderr, "root dir lookup error\n");
 924                 return -1;
 925         }
 926
 927         leaf = path.nodes[0];
 928         inode_item = btrfs_item_ptr(leaf, path.slots[0],
 929                                     struct btrfs_inode_item);
 930
 931         root_dir_inode_size = calculate_dir_inode_size(dir_name);
 932         btrfs_set_inode_size(leaf, inode_item, root_dir_inode_size);
 933         btrfs_mark_buffer_dirty(leaf);
 934
 935         btrfs_release_path(root, &path);
 936
 937         do {
 938                 parent_dir_entry = list_entry(dir_head->list.next,
 939                                               struct directory_name_entry,
 940                                               list);
 941                 list_del(&parent_dir_entry->list);
 942
 943                 parent_inum = parent_dir_entry->inum;
 944                 parent_dir_name = parent_dir_entry->dir_name;
 945                 if (chdir(parent_dir_entry->path)) {
 946                         fprintf(stderr, "chdir error for %s\n",
 947                                 parent_dir_name);
 948                         goto fail_no_files;
 949                 }
 950
 951                 count = scandir(parent_dir_entry->path, &files,
 952                                 directory_select, NULL);
 953                 if (count == -1)
 954                 {
 955                         fprintf(stderr, "scandir for %s failed: %s\n",
 956                                 parent_dir_name, strerror (errno));
 957                         goto fail;
 958                 }
 959
 960                 for (i = 0; i < count; i++) {
 961                         cur_file = files[i];
 962
 963                         if (lstat(cur_file->d_name, &st) == -1) {
 964                                 fprintf(stderr, "lstat failed for file %s\n",
 965                                         cur_file->d_name);
 966                                 goto fail;
 967                         }
 968
 969                         cur_inum = ++highest_inum + BTRFS_FIRST_FREE_OBJECTID;
 970                         ret = add_directory_items(trans, root,
 971                                                   cur_inum, parent_inum,
 972                                                   cur_file->d_name,
 973                                                   &st, &dir_index_cnt);
 974                         if (ret) {
 975                                 fprintf(stderr, "add_directory_items failed\n");
 976                                 goto fail;
 977                         }
 978
 979                         ret = add_inode_items(trans, root, &st,
 980                                               cur_file->d_name, cur_inum,
 981                                               parent_inum, dir_index_cnt,
 982                                               &cur_inode);
 983                         if (ret) {
 984                                 fprintf(stderr, "add_inode_items failed\n");
 985                                 goto fail;
 986                         }
 987
 988                         ret = add_xattr_item(trans, root,
 989                                              cur_inum, cur_file->d_name);
 990                         if (ret) {
 991                                 fprintf(stderr, "add_xattr_item failed\n");
 992                                 if(ret != -ENOTSUP)
 993                                         goto fail;
 994                         }
 995
 996                         if (S_ISDIR(st.st_mode)) {
 997                                 dir_entry = malloc(sizeof(struct directory_name_entry));
 998                                 dir_entry->dir_name = cur_file->d_name;
 999                                 dir_entry->path = make_path(parent_dir_entry->path,
1000                                                             cur_file->d_name);
1001                                 dir_entry->inum = cur_inum;
1002                                 list_add_tail(&dir_entry->list, &dir_head->list);
1003                         } else if (S_ISREG(st.st_mode)) {
1004                                 ret = add_file_items(trans, root, &cur_inode,
1005                                                      cur_inum, parent_inum, &st,
1006                                                      cur_file->d_name, out_fd);
1007                                 if (ret) {
1008                                         fprintf(stderr, "add_file_items failed\n");
1009                                         goto fail;
1010                                 }
1011                         } else if (S_ISLNK(st.st_mode)) {
1012                                 ret = add_symbolic_link(trans, root,
1013                                                         cur_inum, cur_file->d_name);
1014                                 if (ret) {
1015                                         fprintf(stderr, "add_symbolic_link failed\n");
1016                                         goto fail;
1017                                 }
1018                         }
1019                 }
1020
1021                 free_namelist(files, count);
1022                 free(parent_dir_entry->path);
1023                 free(parent_dir_entry);
1024
1025                 index_cnt = 2;
1026
1027         } while (!list_empty(&dir_head->list));
1028
1029         return 0;
1030 fail:
1031         free_namelist(files, count);
1032 fail_no_files:
1033         free(parent_dir_entry->path);
1034         free(parent_dir_entry);
1035         return -1;
1036 }
1037
1038 static int open_target(char *output_name)
1039 {
1040         int output_fd;
1041         output_fd = open(output_name, O_CREAT | O_RDWR | O_TRUNC,
1042                          S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
1043
1044         return output_fd;
1045 }
1046
1047 static int create_chunks(struct btrfs_trans_handle *trans,
1048                          struct btrfs_root *root, u64 num_of_meta_chunks,
1049                          u64 size_of_data)
1050 {
1051         u64 chunk_start;
1052         u64 chunk_size;
1053         u64 meta_type = BTRFS_BLOCK_GROUP_METADATA;
1054         u64 data_type = BTRFS_BLOCK_GROUP_DATA;
1055         u64 minimum_data_chunk_size = 8 * 1024 * 1024;
1056         u64 i;
1057         int ret;
1058
1059         for (i = 0; i < num_of_meta_chunks; i++) {
1060                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
1061                                         &chunk_start, &chunk_size, meta_type);
1062                 BUG_ON(ret);
1063                 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1064                                              meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1065                                              chunk_start, chunk_size);
1066                 BUG_ON(ret);
1067                 set_extent_dirty(&root->fs_info->free_space_cache,
1068                                  chunk_start, chunk_start + chunk_size - 1, 0);
1069         }
1070
1071         if (size_of_data < minimum_data_chunk_size)
1072                 size_of_data = minimum_data_chunk_size;
1073         ret = btrfs_alloc_data_chunk(trans, root->fs_info->extent_root,
1074                                      &chunk_start, size_of_data, data_type);
1075         BUG_ON(ret);
1076         ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1077                                      data_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1078                                      chunk_start, size_of_data);
1079         BUG_ON(ret);
1080         set_extent_dirty(&root->fs_info->free_space_cache,
1081                          chunk_start, chunk_start + size_of_data - 1, 0);
1082         return ret;
1083 }
1084
1085 static int make_image(char *source_dir, struct btrfs_root *root, int out_fd)
1086 {
1087         int ret;
1088         struct btrfs_trans_handle *trans;
1089
1090         struct stat root_st;
1091
1092         struct directory_name_entry dir_head;
1093
1094         ret = lstat(source_dir, &root_st);
1095         if (ret) {
1096                 fprintf(stderr, "unable to lstat the %s\n", source_dir);
1097                 goto fail;
1098         }
1099
1100         INIT_LIST_HEAD(&dir_head.list);
1101
1102         trans = btrfs_start_transaction(root, 1);
1103         ret = traverse_directory(trans, root, source_dir, &dir_head, out_fd);
1104         if (ret) {
1105                 fprintf(stderr, "unable to traverse_directory\n");
1106                 goto fail;
1107         }
1108         btrfs_commit_transaction(trans, root);
1109
1110         printf("Making image is completed.\n");
1111         return 0;
1112 fail:
1113         fprintf(stderr, "Making image is aborted.\n");
1114         return -1;
1115 }
1116
1117 static u64 size_sourcedir(char *dir_name, u64 sectorsize,
1118                           u64 *num_of_meta_chunks_ret, u64 *size_of_data_ret)
1119 {
1120         u64 dir_size = 0;
1121         u64 total_size = 0;
1122         int ret;
1123         char command[1024];
1124         char path[512];
1125         char *file_name = "temp_file";
1126         FILE *file;
1127         u64 default_chunk_size = 8 * 1024 * 1024;       /* 8MB */
1128         u64 allocated_meta_size = 8 * 1024 * 1024;      /* 8MB */
1129         u64 allocated_total_size = 20 * 1024 * 1024;    /* 20MB */
1130         u64 num_of_meta_chunks = 0;
1131         u64 num_of_allocated_meta_chunks =
1132                         allocated_meta_size / default_chunk_size;
1133
1134         ret = sprintf(command, "du -B 4096 -s ");
1135         if (ret < 0) {
1136                 fprintf(stderr, "error executing sprintf for du command\n");
1137                 return -1;
1138         }
1139         strcat(command, dir_name);
1140         strcat(command, " > ");
1141         strcat(command, file_name);
1142         ret = system(command);
1143
1144         file = fopen(file_name, "r");
1145         ret = fscanf(file, "%lld %s\n", &dir_size, path);
1146         fclose(file);
1147         remove(file_name);
1148
1149         dir_size *= sectorsize;
1150         *size_of_data_ret = dir_size;
1151
1152         num_of_meta_chunks = (dir_size / 2) / default_chunk_size;
1153         if (((dir_size / 2) % default_chunk_size) != 0)
1154                 num_of_meta_chunks++;
1155         if (num_of_meta_chunks <= num_of_allocated_meta_chunks)
1156                 num_of_meta_chunks = 0;
1157         else
1158                 num_of_meta_chunks -= num_of_allocated_meta_chunks;
1159
1160         total_size = allocated_total_size + dir_size +
1161                      (num_of_meta_chunks * default_chunk_size);
1162
1163         *num_of_meta_chunks_ret = num_of_meta_chunks;
1164
1165         return total_size;
1166 }
1167
1168 static int zero_output_file(int out_fd, u64 size, u32 sectorsize)
1169 {
1170         int len = sectorsize;
1171         int loop_num = size / sectorsize;
1172         u64 location = 0;
1173         char *buf = malloc(len);
1174         int ret = 0, i;
1175         ssize_t written;
1176
1177         if (!buf)
1178                 return -ENOMEM;
1179         memset(buf, 0, len);
1180         for (i = 0; i < loop_num; i++) {
1181                 written = pwrite64(out_fd, buf, len, location);
1182                 if (written != len)
1183                         ret = -EIO;
1184                 location += sectorsize;
1185         }
1186         free(buf);
1187         return ret;
1188 }
1189
1190 int main(int ac, char **av)
1191 {
1192         char *file;
1193         struct btrfs_root *root;
1194         struct btrfs_trans_handle *trans;
1195         char *label = NULL;
1196         char *first_file;
1197         u64 block_count = 0;
1198         u64 dev_block_count = 0;
1199         u64 blocks[7];
1200         u64 alloc_start = 0;
1201         u64 metadata_profile = 0;
1202         u64 data_profile = 0;
1203         u32 leafsize = getpagesize();
1204         u32 sectorsize = 4096;
1205         u32 nodesize = leafsize;
1206         u32 stripesize = 4096;
1207         int zero_end = 1;
1208         int option_index = 0;
1209         int fd;
1210         int ret;
1211         int i;
1212         int mixed = 0;
1213         int data_profile_opt = 0;
1214         int metadata_profile_opt = 0;
1215
1216         char *source_dir = NULL;
1217         int source_dir_set = 0;
1218         u64 num_of_meta_chunks = 0;
1219         u64 size_of_data = 0;
1220         u64 source_dir_size = 0;
1221         char *pretty_buf;
1222
1223         while(1) {
1224                 int c;
1225                 c = getopt_long(ac, av, "A:b:l:n:s:m:d:L:r:VM", long_options,
1226                                 &option_index);
1227                 if (c < 0)
1228                         break;
1229                 switch(c) {
1230                         case 'A':
1231                                 alloc_start = parse_size(optarg);
1232                                 break;
1233                         case 'd':
1234                                 data_profile = parse_profile(optarg);
1235                                 data_profile_opt = 1;
1236                                 break;
1237                         case 'l':
1238                                 leafsize = parse_size(optarg);
1239                                 break;
1240                         case 'L':
1241                                 label = parse_label(optarg);
1242                                 break;
1243                         case 'm':
1244                                 metadata_profile = parse_profile(optarg);
1245                                 metadata_profile_opt = 1;
1246                                 break;
1247                         case 'M':
1248                                 mixed = 1;
1249                                 break;
1250                         case 'n':
1251                                 nodesize = parse_size(optarg);
1252                                 break;
1253                         case 's':
1254                                 sectorsize = parse_size(optarg);
1255                                 break;
1256                         case 'b':
1257                                 block_count = parse_size(optarg);
1258                                 if (block_count <= 1024*1024*1024) {
1259                                         printf("SMALL VOLUME: forcing mixed "
1260                                                "metadata/data groups\n");
1261                                         mixed = 1;
1262                                 }
1263                                 zero_end = 0;
1264                                 break;
1265                         case 'V':
1266                                 print_version();
1267                                 break;
1268                         case 'r':
1269                                 source_dir = optarg;
1270                                 source_dir_set = 1;
1271                                 break;
1272                         default:
1273                                 print_usage();
1274                 }
1275         }
1276         sectorsize = max(sectorsize, (u32)getpagesize());
1277         if (leafsize < sectorsize || (leafsize & (sectorsize - 1))) {
1278                 fprintf(stderr, "Illegal leafsize %u\n", leafsize);
1279                 exit(1);
1280         }
1281         if (nodesize < sectorsize || (nodesize & (sectorsize - 1))) {
1282                 fprintf(stderr, "Illegal nodesize %u\n", nodesize);
1283                 exit(1);
1284         }
1285         ac = ac - optind;
1286         if (ac == 0)
1287                 print_usage();
1288
1289         printf("\nWARNING! - %s IS EXPERIMENTAL\n", BTRFS_BUILD_VERSION);
1290         printf("WARNING! - see http://btrfs.wiki.kernel.org before using\n\n");
1291
1292         if (source_dir == 0) {
1293                 file = av[optind++];
1294                 ret = check_mounted(file);
1295                 if (ret < 0) {
1296                         fprintf(stderr, "error checking %s mount status\n", file);
1297                         exit(1);
1298                 }
1299                 if (ret == 1) {
1300                         fprintf(stderr, "%s is mounted\n", file);
1301                         exit(1);
1302                 }
1303                 ac--;
1304                 fd = open(file, O_RDWR);
1305                 if (fd < 0) {
1306                         fprintf(stderr, "unable to open %s\n", file);
1307                         exit(1);
1308                 }
1309                 first_file = file;
1310                 ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count, &mixed);
1311                 if (block_count == 0)
1312                         block_count = dev_block_count;
1313         } else {
1314                 ac = 0;
1315                 file = av[optind++];
1316                 fd = open_target(file);
1317                 if (fd < 0) {
1318                         fprintf(stderr, "unable to open the %s\n", file);
1319                         exit(1);
1320                 }
1321
1322                 first_file = file;
1323                 source_dir_size = size_sourcedir(source_dir, sectorsize,
1324                                              &num_of_meta_chunks, &size_of_data);
1325                 if(block_count < source_dir_size)
1326                         block_count = source_dir_size;
1327                 ret = zero_output_file(fd, block_count, sectorsize);
1328                 if (ret) {
1329                         fprintf(stderr, "unable to zero the output file\n");
1330                         exit(1);
1331                 }
1332         }
1333         if (mixed) {
1334                 if (metadata_profile != data_profile) {
1335                         fprintf(stderr, "With mixed block groups data and metadata "
1336                                 "profiles must be the same\n");
1337                         exit(1);
1338                 }
1339         }
1340
1341         blocks[0] = BTRFS_SUPER_INFO_OFFSET;
1342         for (i = 1; i < 7; i++) {
1343                 blocks[i] = BTRFS_SUPER_INFO_OFFSET + 1024 * 1024 +
1344                         leafsize * i;
1345         }
1346
1347         ret = make_btrfs(fd, file, label, blocks, block_count,
1348                          nodesize, leafsize,
1349                          sectorsize, stripesize);
1350         if (ret) {
1351                 fprintf(stderr, "error during mkfs %d\n", ret);
1352                 exit(1);
1353         }
1354
1355         root = open_ctree(file, 0, O_RDWR);
1356         if (!root) {
1357                 fprintf(stderr, "ctree init failed\n");
1358                 exit(1);
1359         }
1360         root->fs_info->alloc_start = alloc_start;
1361
1362         ret = make_root_dir(root, mixed);
1363         if (ret) {
1364                 fprintf(stderr, "failed to setup the root directory\n");
1365                 exit(1);
1366         }
1367
1368         trans = btrfs_start_transaction(root, 1);
1369
1370         if (ac == 0)
1371                 goto raid_groups;
1372
1373         btrfs_register_one_device(file);
1374
1375         zero_end = 1;
1376         while(ac-- > 0) {
1377                 int old_mixed = mixed;
1378
1379                 file = av[optind++];
1380                 ret = check_mounted(file);
1381                 if (ret < 0) {
1382                         fprintf(stderr, "error checking %s mount status\n",
1383                                 file);
1384                         exit(1);
1385                 }
1386                 if (ret == 1) {
1387                         fprintf(stderr, "%s is mounted\n", file);
1388                         exit(1);
1389                 }
1390                 fd = open(file, O_RDWR);
1391                 if (fd < 0) {
1392                         fprintf(stderr, "unable to open %s\n", file);
1393                         exit(1);
1394                 }
1395                 ret = btrfs_device_already_in_root(root, fd,
1396                                                    BTRFS_SUPER_INFO_OFFSET);
1397                 if (ret) {
1398                         fprintf(stderr, "skipping duplicate device %s in FS\n",
1399                                 file);
1400                         close(fd);
1401                         continue;
1402                 }
1403                 ret = btrfs_prepare_device(fd, file, zero_end,
1404                                            &dev_block_count, &mixed);
1405                 mixed = old_mixed;
1406                 BUG_ON(ret);
1407
1408                 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
1409                                         sectorsize, sectorsize, sectorsize);
1410                 BUG_ON(ret);
1411                 btrfs_register_one_device(file);
1412         }
1413
1414 raid_groups:
1415         if (!source_dir_set) {
1416                 ret = create_raid_groups(trans, root, data_profile,
1417                                  data_profile_opt, metadata_profile,
1418                                  metadata_profile_opt, mixed);
1419                 BUG_ON(ret);
1420         }
1421
1422         ret = create_data_reloc_tree(trans, root);
1423         BUG_ON(ret);
1424
1425         if (mixed) {
1426                 struct btrfs_super_block *super = &root->fs_info->super_copy;
1427                 u64 flags = btrfs_super_incompat_flags(super);
1428
1429                 flags |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
1430                 btrfs_set_super_incompat_flags(super, flags);
1431         }
1432
1433         printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
1434             "sectorsize %u size %s\n",
1435             label, first_file, nodesize, leafsize, sectorsize,
1436             pretty_buf = pretty_sizes(btrfs_super_total_bytes(&root->fs_info->super_copy)));
1437         free(pretty_buf);
1438
1439         printf("%s\n", BTRFS_BUILD_VERSION);
1440         btrfs_commit_transaction(trans, root);
1441
1442         if (source_dir_set) {
1443                 trans = btrfs_start_transaction(root, 1);
1444                 ret = create_chunks(trans, root,
1445                                     num_of_meta_chunks, size_of_data);
1446                 BUG_ON(ret);
1447                 btrfs_commit_transaction(trans, root);
1448
1449                 ret = make_image(source_dir, root, fd);
1450                 BUG_ON(ret);
1451         }
1452
1453         ret = close_ctree(root);
1454         BUG_ON(ret);
1455
1456         free(label);
1457         return 0;
1458 }
1459