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         u64 ret;
  63
  64         s = strdup(s);
  65
  66         if (len && !isdigit(s[len - 1])) {
  67                 c = tolower(s[len - 1]);
  68                 switch (c) {
  69                 case 'g':
  70                         mult *= 1024;
  71                 case 'm':
  72                         mult *= 1024;
  73                 case 'k':
  74                         mult *= 1024;
  75                 case 'b':
  76                         break;
  77                 default:
  78                         fprintf(stderr, "Unknown size descriptor %c\n", c);
  79                         exit(1);
  80                 }
  81                 s[len - 1] = '\0';
  82         }
  83         ret = atol(s) * mult;
  84         free(s);
  85         return ret;
  86 }
  87
  88 static int make_root_dir(struct btrfs_root *root, int mixed)
  89 {
  90         struct btrfs_trans_handle *trans;
  91         struct btrfs_key location;
  92         u64 bytes_used;
  93         u64 chunk_start = 0;
  94         u64 chunk_size = 0;
  95         int ret;
  96
  97         trans = btrfs_start_transaction(root, 1);
  98         bytes_used = btrfs_super_bytes_used(&root->fs_info->super_copy);
  99
 100         root->fs_info->system_allocs = 1;
 101         ret = btrfs_make_block_group(trans, root, bytes_used,
 102                                      BTRFS_BLOCK_GROUP_SYSTEM,
 103                                      BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 104                                      0, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
 105         BUG_ON(ret);
 106
 107         if (mixed) {
 108                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 109                                         &chunk_start, &chunk_size,
 110                                         BTRFS_BLOCK_GROUP_METADATA |
 111                                         BTRFS_BLOCK_GROUP_DATA);
 112                 BUG_ON(ret);
 113                 ret = btrfs_make_block_group(trans, root, 0,
 114                                              BTRFS_BLOCK_GROUP_METADATA |
 115                                              BTRFS_BLOCK_GROUP_DATA,
 116                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 117                                              chunk_start, chunk_size);
 118                 BUG_ON(ret);
 119                 printf("Created a data/metadata chunk of size %llu\n", chunk_size);
 120         } else {
 121                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 122                                         &chunk_start, &chunk_size,
 123                                         BTRFS_BLOCK_GROUP_METADATA);
 124                 BUG_ON(ret);
 125                 ret = btrfs_make_block_group(trans, root, 0,
 126                                              BTRFS_BLOCK_GROUP_METADATA,
 127                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 128                                              chunk_start, chunk_size);
 129                 BUG_ON(ret);
 130         }
 131
 132         root->fs_info->system_allocs = 0;
 133         btrfs_commit_transaction(trans, root);
 134         trans = btrfs_start_transaction(root, 1);
 135         BUG_ON(!trans);
 136
 137         if (!mixed) {
 138                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 139                                         &chunk_start, &chunk_size,
 140                                         BTRFS_BLOCK_GROUP_DATA);
 141                 BUG_ON(ret);
 142                 ret = btrfs_make_block_group(trans, root, 0,
 143                                              BTRFS_BLOCK_GROUP_DATA,
 144                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 145                                              chunk_start, chunk_size);
 146                 BUG_ON(ret);
 147         }
 148
 149         ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
 150                               BTRFS_ROOT_TREE_DIR_OBJECTID);
 151         if (ret)
 152                 goto err;
 153         ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
 154         if (ret)
 155                 goto err;
 156         memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
 157         location.offset = (u64)-1;
 158         ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
 159                         "default", 7,
 160                         btrfs_super_root_dir(&root->fs_info->super_copy),
 161                         &location, BTRFS_FT_DIR, 0);
 162         if (ret)
 163                 goto err;
 164
 165         ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
 166                              "default", 7, location.objectid,
 167                              BTRFS_ROOT_TREE_DIR_OBJECTID, 0);
 168         if (ret)
 169                 goto err;
 170
 171         btrfs_commit_transaction(trans, root);
 172 err:
 173         return ret;
 174 }
 175
 176 static int recow_roots(struct btrfs_trans_handle *trans,
 177                        struct btrfs_root *root)
 178 {
 179         int ret;
 180         struct extent_buffer *tmp;
 181         struct btrfs_fs_info *info = root->fs_info;
 182
 183         ret = __btrfs_cow_block(trans, info->fs_root, info->fs_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->tree_root, info->tree_root->node,
 189                                 NULL, 0, &tmp, 0, 0);
 190         BUG_ON(ret);
 191         free_extent_buffer(tmp);
 192
 193         ret = __btrfs_cow_block(trans, info->extent_root,
 194                                 info->extent_root->node, NULL, 0, &tmp, 0, 0);
 195         BUG_ON(ret);
 196         free_extent_buffer(tmp);
 197
 198         ret = __btrfs_cow_block(trans, info->chunk_root, info->chunk_root->node,
 199                                 NULL, 0, &tmp, 0, 0);
 200         BUG_ON(ret);
 201         free_extent_buffer(tmp);
 202
 203
 204         ret = __btrfs_cow_block(trans, info->dev_root, info->dev_root->node,
 205                                 NULL, 0, &tmp, 0, 0);
 206         BUG_ON(ret);
 207         free_extent_buffer(tmp);
 208
 209         ret = __btrfs_cow_block(trans, info->csum_root, info->csum_root->node,
 210                                 NULL, 0, &tmp, 0, 0);
 211         BUG_ON(ret);
 212         free_extent_buffer(tmp);
 213
 214         return 0;
 215 }
 216
 217 static int create_one_raid_group(struct btrfs_trans_handle *trans,
 218                               struct btrfs_root *root, u64 type)
 219 {
 220         u64 chunk_start;
 221         u64 chunk_size;
 222         int ret;
 223
 224         ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 225                                 &chunk_start, &chunk_size, type);
 226         BUG_ON(ret);
 227         ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
 228                                      type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 229                                      chunk_start, chunk_size);
 230         BUG_ON(ret);
 231         return ret;
 232 }
 233
 234 static int create_raid_groups(struct btrfs_trans_handle *trans,
 235                               struct btrfs_root *root, u64 data_profile,
 236                               int data_profile_opt, u64 metadata_profile,
 237                               int metadata_profile_opt, int mixed)
 238 {
 239         u64 num_devices = btrfs_super_num_devices(&root->fs_info->super_copy);
 240         u64 allowed;
 241         int ret;
 242
 243         /*
 244          * Set default profiles according to number of added devices.
 245          * For mixed groups defaults are single/single.
 246          */
 247         if (!metadata_profile_opt && !mixed) {
 248                 metadata_profile = (num_devices > 1) ?
 249                         BTRFS_BLOCK_GROUP_RAID1 : BTRFS_BLOCK_GROUP_DUP;
 250         }
 251         if (!data_profile_opt && !mixed) {
 252                 data_profile = (num_devices > 1) ?
 253                         BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */
 254         }
 255
 256         if (num_devices == 1)
 257                 allowed = BTRFS_BLOCK_GROUP_DUP;
 258         else if (num_devices >= 4) {
 259                 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
 260                         BTRFS_BLOCK_GROUP_RAID10;
 261         } else
 262                 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1;
 263
 264         if (metadata_profile & ~allowed) {
 265                 fprintf(stderr, "unable to create FS with metadata "
 266                         "profile %llu (have %llu devices)\n", metadata_profile,
 267                         num_devices);
 268                 exit(1);
 269         }
 270         if (data_profile & ~allowed) {
 271                 fprintf(stderr, "unable to create FS with data "
 272                         "profile %llu (have %llu devices)\n", data_profile,
 273                         num_devices);
 274                 exit(1);
 275         }
 276
 277         /* allow dup'ed data chunks only in mixed mode */
 278         if (!mixed && (data_profile & BTRFS_BLOCK_GROUP_DUP)) {
 279                 fprintf(stderr, "dup for data is allowed only in mixed mode\n");
 280                 exit(1);
 281         }
 282
 283         if (allowed & metadata_profile) {
 284                 u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA;
 285
 286                 ret = create_one_raid_group(trans, root,
 287                                             BTRFS_BLOCK_GROUP_SYSTEM |
 288                                             (allowed & metadata_profile));
 289                 BUG_ON(ret);
 290
 291                 if (mixed)
 292                         meta_flags |= BTRFS_BLOCK_GROUP_DATA;
 293
 294                 ret = create_one_raid_group(trans, root, meta_flags |
 295                                             (allowed & metadata_profile));
 296                 BUG_ON(ret);
 297
 298                 ret = recow_roots(trans, root);
 299                 BUG_ON(ret);
 300         }
 301         if (!mixed && num_devices > 1 && (allowed & data_profile)) {
 302                 ret = create_one_raid_group(trans, root,
 303                                             BTRFS_BLOCK_GROUP_DATA |
 304                                             (allowed & data_profile));
 305                 BUG_ON(ret);
 306         }
 307         return 0;
 308 }
 309
 310 static int create_data_reloc_tree(struct btrfs_trans_handle *trans,
 311                                   struct btrfs_root *root)
 312 {
 313         struct btrfs_key location;
 314         struct btrfs_root_item root_item;
 315         struct extent_buffer *tmp;
 316         u64 objectid = BTRFS_DATA_RELOC_TREE_OBJECTID;
 317         int ret;
 318
 319         ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
 320         BUG_ON(ret);
 321
 322         memcpy(&root_item, &root->root_item, sizeof(root_item));
 323         btrfs_set_root_bytenr(&root_item, tmp->start);
 324         btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
 325         btrfs_set_root_generation(&root_item, trans->transid);
 326         free_extent_buffer(tmp);
 327
 328         location.objectid = objectid;
 329         location.type = BTRFS_ROOT_ITEM_KEY;
 330         location.offset = 0;
 331         ret = btrfs_insert_root(trans, root->fs_info->tree_root,
 332                                 &location, &root_item);
 333         BUG_ON(ret);
 334         return 0;
 335 }
 336
 337 static void print_usage(void)
 338 {
 339         fprintf(stderr, "usage: mkfs.btrfs [options] dev [ dev ... ]\n");
 340         fprintf(stderr, "options:\n");
 341         fprintf(stderr, "\t -A --alloc-start the offset to start the FS\n");
 342         fprintf(stderr, "\t -b --byte-count total number of bytes in the FS\n");
 343         fprintf(stderr, "\t -d --data data profile, raid0, raid1, raid10, dup or single\n");
 344         fprintf(stderr, "\t -l --leafsize size of btree leaves\n");
 345         fprintf(stderr, "\t -L --label set a label\n");
 346         fprintf(stderr, "\t -m --metadata metadata profile, values like data profile\n");
 347         fprintf(stderr, "\t -M --mixed mix metadata and data together\n");
 348         fprintf(stderr, "\t -n --nodesize size of btree nodes\n");
 349         fprintf(stderr, "\t -s --sectorsize min block allocation\n");
 350         fprintf(stderr, "\t -r --rootdir the source directory\n");
 351         fprintf(stderr, "\t -K --nodiscard do not perform whole device TRIM\n");
 352         fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
 353         exit(1);
 354 }
 355
 356 static void print_version(void)
 357 {
 358         fprintf(stderr, "mkfs.btrfs, part of %s\n", BTRFS_BUILD_VERSION);
 359         exit(0);
 360 }
 361
 362 static u64 parse_profile(char *s)
 363 {
 364         if (strcmp(s, "raid0") == 0) {
 365                 return BTRFS_BLOCK_GROUP_RAID0;
 366         } else if (strcmp(s, "raid1") == 0) {
 367                 return BTRFS_BLOCK_GROUP_RAID1;
 368         } else if (strcmp(s, "raid10") == 0) {
 369                 return BTRFS_BLOCK_GROUP_RAID10;
 370         } else if (strcmp(s, "dup") == 0) {
 371                 return BTRFS_BLOCK_GROUP_DUP;
 372         } else if (strcmp(s, "single") == 0) {
 373                 return 0;
 374         } else {
 375                 fprintf(stderr, "Unknown profile %s\n", s);
 376                 print_usage();
 377         }
 378         /* not reached */
 379         return 0;
 380 }
 381
 382 static char *parse_label(char *input)
 383 {
 384         int i;
 385         int len = strlen(input);
 386
 387         if (len >= BTRFS_LABEL_SIZE) {
 388                 fprintf(stderr, "Label %s is too long (max %d)\n", input,
 389                         BTRFS_LABEL_SIZE - 1);
 390                 exit(1);
 391         }
 392         for (i = 0; i < len; i++) {
 393                 if (input[i] == '/' || input[i] == '\\') {
 394                         fprintf(stderr, "invalid label %s\n", input);
 395                         exit(1);
 396                 }
 397         }
 398         return strdup(input);
 399 }
 400
 401 static struct option long_options[] = {
 402         { "alloc-start", 1, NULL, 'A'},
 403         { "byte-count", 1, NULL, 'b' },
 404         { "leafsize", 1, NULL, 'l' },
 405         { "label", 1, NULL, 'L'},
 406         { "metadata", 1, NULL, 'm' },
 407         { "mixed", 0, NULL, 'M' },
 408         { "nodesize", 1, NULL, 'n' },
 409         { "sectorsize", 1, NULL, 's' },
 410         { "data", 1, NULL, 'd' },
 411         { "version", 0, NULL, 'V' },
 412         { "rootdir", 1, NULL, 'r' },
 413         { "nodiscard", 0, NULL, 'K' },
 414         { 0, 0, 0, 0}
 415 };
 416
 417 static int add_directory_items(struct btrfs_trans_handle *trans,
 418                                struct btrfs_root *root, u64 objectid,
 419                                ino_t parent_inum, const char *name,
 420                                struct stat *st, int *dir_index_cnt)
 421 {
 422         int ret;
 423         int name_len;
 424         struct btrfs_key location;
 425         u8 filetype = 0;
 426
 427         name_len = strlen(name);
 428
 429         location.objectid = objectid;
 430         location.offset = 0;
 431         btrfs_set_key_type(&location, BTRFS_INODE_ITEM_KEY);
 432
 433         if (S_ISDIR(st->st_mode))
 434                 filetype = BTRFS_FT_DIR;
 435         if (S_ISREG(st->st_mode))
 436                 filetype = BTRFS_FT_REG_FILE;
 437         if (S_ISLNK(st->st_mode))
 438                 filetype = BTRFS_FT_SYMLINK;
 439
 440         ret = btrfs_insert_dir_item(trans, root, name, name_len,
 441                                     parent_inum, &location,
 442                                     filetype, index_cnt);
 443
 444         *dir_index_cnt = index_cnt;
 445         index_cnt++;
 446
 447         return ret;
 448 }
 449
 450 static int fill_inode_item(struct btrfs_trans_handle *trans,
 451                            struct btrfs_root *root,
 452                            struct btrfs_inode_item *dst, struct stat *src)
 453 {
 454         u64 blocks = 0;
 455         u64 sectorsize = root->sectorsize;
 456
 457         /*
 458          * btrfs_inode_item has some reserved fields
 459          * and represents on-disk inode entry, so
 460          * zero everything to prevent information leak
 461          */
 462         memset(dst, 0, sizeof (*dst));
 463
 464         btrfs_set_stack_inode_generation(dst, trans->transid);
 465         btrfs_set_stack_inode_size(dst, src->st_size);
 466         btrfs_set_stack_inode_nbytes(dst, 0);
 467         btrfs_set_stack_inode_block_group(dst, 0);
 468         btrfs_set_stack_inode_nlink(dst, src->st_nlink);
 469         btrfs_set_stack_inode_uid(dst, src->st_uid);
 470         btrfs_set_stack_inode_gid(dst, src->st_gid);
 471         btrfs_set_stack_inode_mode(dst, src->st_mode);
 472         btrfs_set_stack_inode_rdev(dst, 0);
 473         btrfs_set_stack_inode_flags(dst, 0);
 474         btrfs_set_stack_timespec_sec(&dst->atime, src->st_atime);
 475         btrfs_set_stack_timespec_nsec(&dst->atime, 0);
 476         btrfs_set_stack_timespec_sec(&dst->ctime, src->st_ctime);
 477         btrfs_set_stack_timespec_nsec(&dst->ctime, 0);
 478         btrfs_set_stack_timespec_sec(&dst->mtime, src->st_mtime);
 479         btrfs_set_stack_timespec_nsec(&dst->mtime, 0);
 480         btrfs_set_stack_timespec_sec(&dst->otime, 0);
 481         btrfs_set_stack_timespec_nsec(&dst->otime, 0);
 482
 483         if (S_ISDIR(src->st_mode)) {
 484                 btrfs_set_stack_inode_size(dst, 0);
 485                 btrfs_set_stack_inode_nlink(dst, 1);
 486         }
 487         if (S_ISREG(src->st_mode)) {
 488                 btrfs_set_stack_inode_size(dst, (u64)src->st_size);
 489                 if (src->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root))
 490                         btrfs_set_stack_inode_nbytes(dst, src->st_size);
 491                 else {
 492                         blocks = src->st_size / sectorsize;
 493                         if (src->st_size % sectorsize)
 494                                 blocks += 1;
 495                         blocks *= sectorsize;
 496                         btrfs_set_stack_inode_nbytes(dst, blocks);
 497                 }
 498         }
 499         if (S_ISLNK(src->st_mode))
 500                 btrfs_set_stack_inode_nbytes(dst, src->st_size + 1);
 501
 502         return 0;
 503 }
 504
 505 static int directory_select(const struct direct *entry)
 506 {
 507         if ((strncmp(entry->d_name, ".", entry->d_reclen) == 0) ||
 508                 (strncmp(entry->d_name, "..", entry->d_reclen) == 0))
 509                 return 0;
 510         else
 511                 return 1;
 512 }
 513
 514 static void free_namelist(struct direct **files, int count)
 515 {
 516         int i;
 517
 518         if (count < 0)
 519                 return;
 520
 521         for (i = 0; i < count; ++i)
 522                 free(files[i]);
 523         free(files);
 524 }
 525
 526 static u64 calculate_dir_inode_size(char *dirname)
 527 {
 528         int count, i;
 529         struct direct **files, *cur_file;
 530         u64 dir_inode_size = 0;
 531
 532         count = scandir(dirname, &files, directory_select, NULL);
 533
 534         for (i = 0; i < count; i++) {
 535                 cur_file = files[i];
 536                 dir_inode_size += strlen(cur_file->d_name);
 537         }
 538
 539         free_namelist(files, count);
 540
 541         dir_inode_size *= 2;
 542         return dir_inode_size;
 543 }
 544
 545 static int add_inode_items(struct btrfs_trans_handle *trans,
 546                            struct btrfs_root *root,
 547                            struct stat *st, char *name,
 548                            u64 self_objectid, ino_t parent_inum,
 549                            int dir_index_cnt, struct btrfs_inode_item *inode_ret)
 550 {
 551         int ret;
 552         struct btrfs_key inode_key;
 553         struct btrfs_inode_item btrfs_inode;
 554         u64 objectid;
 555         u64 inode_size = 0;
 556         int name_len;
 557
 558         name_len = strlen(name);
 559         fill_inode_item(trans, root, &btrfs_inode, st);
 560         objectid = self_objectid;
 561
 562         if (S_ISDIR(st->st_mode)) {
 563                 inode_size = calculate_dir_inode_size(name);
 564                 btrfs_set_stack_inode_size(&btrfs_inode, inode_size);
 565         }
 566
 567         inode_key.objectid = objectid;
 568         inode_key.offset = 0;
 569         btrfs_set_key_type(&inode_key, BTRFS_INODE_ITEM_KEY);
 570
 571         ret = btrfs_insert_inode(trans, root, objectid, &btrfs_inode);
 572         if (ret)
 573                 goto fail;
 574
 575         ret = btrfs_insert_inode_ref(trans, root, name, name_len,
 576                                      objectid, parent_inum, dir_index_cnt);
 577         if (ret)
 578                 goto fail;
 579
 580         *inode_ret = btrfs_inode;
 581 fail:
 582         return ret;
 583 }
 584
 585 static int add_xattr_item(struct btrfs_trans_handle *trans,
 586                           struct btrfs_root *root, u64 objectid,
 587                           const char *file_name)
 588 {
 589         int ret;
 590         int cur_name_len;
 591         char xattr_list[XATTR_LIST_MAX];
 592         char *cur_name;
 593         char cur_value[XATTR_SIZE_MAX];
 594         char delimiter = '\0';
 595         char *next_location = xattr_list;
 596
 597         ret = llistxattr(file_name, xattr_list, XATTR_LIST_MAX);
 598         if (ret < 0) {
 599                 if(errno == ENOTSUP)
 600                         return 0;
 601                 fprintf(stderr, "get a list of xattr failed for %s\n",
 602                         file_name);
 603                 return ret;
 604         }
 605         if (ret == 0)
 606                 return ret;
 607
 608         cur_name = strtok(xattr_list, &delimiter);
 609         while (cur_name != NULL) {
 610                 cur_name_len = strlen(cur_name);
 611                 next_location += cur_name_len + 1;
 612
 613                 ret = getxattr(file_name, cur_name, cur_value, XATTR_SIZE_MAX);
 614                 if (ret < 0) {
 615                         if(errno == ENOTSUP)
 616                                 return 0;
 617                         fprintf(stderr, "get a xattr value failed for %s attr %s\n",
 618                                 file_name, cur_name);
 619                         return ret;
 620                 }
 621
 622                 ret = btrfs_insert_xattr_item(trans, root, cur_name,
 623                                               cur_name_len, cur_value,
 624                                               ret, objectid);
 625                 if (ret) {
 626                         fprintf(stderr, "insert a xattr item failed for %s\n",
 627                                 file_name);
 628                 }
 629
 630                 cur_name = strtok(next_location, &delimiter);
 631         }
 632
 633         return ret;
 634 }
 635 static int custom_alloc_extent(struct btrfs_root *root, u64 num_bytes,
 636                                u64 hint_byte, struct btrfs_key *ins)
 637 {
 638         u64 start;
 639         u64 end;
 640         u64 last = hint_byte;
 641         int ret;
 642         int wrapped = 0;
 643         struct btrfs_block_group_cache *cache;
 644
 645         while (1) {
 646                 ret = find_first_extent_bit(&root->fs_info->free_space_cache,
 647                                             last, &start, &end, EXTENT_DIRTY);
 648                 if (ret) {
 649                         if (wrapped++ == 0) {
 650                                 last = 0;
 651                                 continue;
 652                         } else {
 653                                 goto fail;
 654                         }
 655                 }
 656
 657                 start = max(last, start);
 658                 last = end + 1;
 659                 if (last - start < num_bytes)
 660                         continue;
 661
 662                 last = start + num_bytes;
 663                 if (test_range_bit(&root->fs_info->pinned_extents,
 664                                    start, last - 1, EXTENT_DIRTY, 0))
 665                         continue;
 666
 667                 cache = btrfs_lookup_block_group(root->fs_info, start);
 668                 BUG_ON(!cache);
 669                 if (cache->flags & BTRFS_BLOCK_GROUP_SYSTEM ||
 670                     last > cache->key.objectid + cache->key.offset) {
 671                         last = cache->key.objectid + cache->key.offset;
 672                         continue;
 673                 }
 674
 675                 if (cache->flags & (BTRFS_BLOCK_GROUP_SYSTEM |
 676                             BTRFS_BLOCK_GROUP_METADATA)) {
 677                         last = cache->key.objectid + cache->key.offset;
 678                         continue;
 679                 }
 680
 681                 clear_extent_dirty(&root->fs_info->free_space_cache,
 682                                    start, start + num_bytes - 1, 0);
 683
 684                 ins->objectid = start;
 685                 ins->offset = num_bytes;
 686                 ins->type = BTRFS_EXTENT_ITEM_KEY;
 687                 return 0;
 688         }
 689 fail:
 690         fprintf(stderr, "not enough free space\n");
 691         return -ENOSPC;
 692 }
 693
 694 static int record_file_extent(struct btrfs_trans_handle *trans,
 695                               struct btrfs_root *root, u64 objectid,
 696                               struct btrfs_inode_item *inode,
 697                               u64 file_pos, u64 disk_bytenr,
 698                               u64 num_bytes)
 699 {
 700         int ret;
 701         struct btrfs_fs_info *info = root->fs_info;
 702         struct btrfs_root *extent_root = info->extent_root;
 703         struct extent_buffer *leaf;
 704         struct btrfs_file_extent_item *fi;
 705         struct btrfs_key ins_key;
 706         struct btrfs_path path;
 707         struct btrfs_extent_item *ei;
 708
 709         btrfs_init_path(&path);
 710
 711         ins_key.objectid = objectid;
 712         ins_key.offset = 0;
 713         btrfs_set_key_type(&ins_key, BTRFS_EXTENT_DATA_KEY);
 714         ret = btrfs_insert_empty_item(trans, root, &path, &ins_key,
 715                                       sizeof(*fi));
 716         if (ret)
 717                 goto fail;
 718         leaf = path.nodes[0];
 719         fi = btrfs_item_ptr(leaf, path.slots[0],
 720                             struct btrfs_file_extent_item);
 721         btrfs_set_file_extent_generation(leaf, fi, trans->transid);
 722         btrfs_set_file_extent_type(leaf, fi, BTRFS_FILE_EXTENT_REG);
 723         btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
 724         btrfs_set_file_extent_disk_num_bytes(leaf, fi, num_bytes);
 725         btrfs_set_file_extent_offset(leaf, fi, 0);
 726         btrfs_set_file_extent_num_bytes(leaf, fi, num_bytes);
 727         btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes);
 728         btrfs_set_file_extent_compression(leaf, fi, 0);
 729         btrfs_set_file_extent_encryption(leaf, fi, 0);
 730         btrfs_set_file_extent_other_encoding(leaf, fi, 0);
 731         btrfs_mark_buffer_dirty(leaf);
 732
 733         btrfs_release_path(root, &path);
 734
 735         ins_key.objectid = disk_bytenr;
 736         ins_key.offset = num_bytes;
 737         ins_key.type = BTRFS_EXTENT_ITEM_KEY;
 738
 739         ret = btrfs_insert_empty_item(trans, extent_root, &path,
 740                                 &ins_key, sizeof(*ei));
 741         if (ret == 0) {
 742                 leaf = path.nodes[0];
 743                 ei = btrfs_item_ptr(leaf, path.slots[0],
 744                                     struct btrfs_extent_item);
 745
 746                 btrfs_set_extent_refs(leaf, ei, 0);
 747                 btrfs_set_extent_generation(leaf, ei, trans->transid);
 748                 btrfs_set_extent_flags(leaf, ei, BTRFS_EXTENT_FLAG_DATA);
 749
 750                 btrfs_mark_buffer_dirty(leaf);
 751                 ret = btrfs_update_block_group(trans, root, disk_bytenr,
 752                                                num_bytes, 1, 0);
 753                 if (ret)
 754                         goto fail;
 755         } else if (ret != -EEXIST) {
 756                 goto fail;
 757         }
 758
 759         ret = btrfs_inc_extent_ref(trans, root, disk_bytenr, num_bytes, 0,
 760                                    root->root_key.objectid,
 761                                    objectid, 0);
 762 fail:
 763         btrfs_release_path(root, &path);
 764         return ret;
 765 }
 766
 767 static int add_symbolic_link(struct btrfs_trans_handle *trans,
 768                              struct btrfs_root *root,
 769                              u64 objectid, const char *path_name)
 770 {
 771         int ret;
 772         u64 sectorsize = root->sectorsize;
 773         char *buf = malloc(sectorsize);
 774
 775         ret = readlink(path_name, buf, sectorsize);
 776         if (ret <= 0) {
 777                 fprintf(stderr, "readlink failed for %s\n", path_name);
 778                 goto fail;
 779         }
 780         if (ret >= sectorsize) {
 781                 fprintf(stderr, "symlink too long for %s", path_name);
 782                 ret = -1;
 783                 goto fail;
 784         }
 785
 786         buf[ret] = '\0'; /* readlink does not do it for us */
 787         ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
 788                                          buf, ret + 1);
 789 fail:
 790         free(buf);
 791         return ret;
 792 }
 793
 794 static int add_file_items(struct btrfs_trans_handle *trans,
 795                           struct btrfs_root *root,
 796                           struct btrfs_inode_item *btrfs_inode, u64 objectid,
 797                           ino_t parent_inum, struct stat *st,
 798                           const char *path_name, int out_fd)
 799 {
 800         int ret = -1;
 801         ssize_t ret_read;
 802         u64 bytes_read = 0;
 803         char *buffer = NULL;
 804         struct btrfs_key key;
 805         int blocks;
 806         u32 sectorsize = root->sectorsize;
 807         u64 first_block = 0;
 808         u64 num_blocks = 0;
 809         int fd;
 810
 811         fd = open(path_name, O_RDONLY);
 812         if (fd == -1) {
 813                 fprintf(stderr, "%s open failed\n", path_name);
 814                 goto end;
 815         }
 816
 817         blocks = st->st_size / sectorsize;
 818         if (st->st_size % sectorsize)
 819                 blocks += 1;
 820
 821         if (st->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root)) {
 822                 buffer = malloc(st->st_size);
 823                 ret_read = pread64(fd, buffer, st->st_size, bytes_read);
 824                 if (ret_read == -1) {
 825                         fprintf(stderr, "%s read failed\n", path_name);
 826                         goto end;
 827                 }
 828
 829                 ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
 830                                                  buffer, st->st_size);
 831                 goto end;
 832         }
 833
 834         ret = custom_alloc_extent(root, blocks * sectorsize, 0, &key);
 835         if (ret)
 836                 goto end;
 837
 838         first_block = key.objectid;
 839         bytes_read = 0;
 840         buffer = malloc(sectorsize);
 841
 842         do {
 843                 memset(buffer, 0, sectorsize);
 844                 ret_read = pread64(fd, buffer, sectorsize, bytes_read);
 845                 if (ret_read == -1) {
 846                         fprintf(stderr, "%s read failed\n", path_name);
 847                         goto end;
 848                 }
 849
 850                 ret = pwrite64(out_fd, buffer, sectorsize,
 851                                first_block + bytes_read);
 852                 if (ret != sectorsize) {
 853                         fprintf(stderr, "output file write failed\n");
 854                         goto end;
 855                 }
 856
 857                 /* checksum for file data */
 858                 ret = btrfs_csum_file_block(trans, root->fs_info->csum_root,
 859                                 first_block + (blocks * sectorsize),
 860                                 first_block + bytes_read,
 861                                 buffer, sectorsize);
 862                 if (ret) {
 863                         fprintf(stderr, "%s checksum failed\n", path_name);
 864                         goto end;
 865                 }
 866
 867                 bytes_read += ret_read;
 868                 num_blocks++;
 869         } while (ret_read == sectorsize);
 870
 871         if (num_blocks > 0) {
 872                 ret = record_file_extent(trans, root, objectid, btrfs_inode,
 873                                          first_block, first_block,
 874                                          blocks * sectorsize);
 875                 if (ret)
 876                         goto end;
 877         }
 878
 879 end:
 880         if (buffer)
 881                 free(buffer);
 882         close(fd);
 883         return ret;
 884 }
 885
 886 static char *make_path(char *dir, char *name)
 887 {
 888         char *path;
 889
 890         path = malloc(strlen(dir) + strlen(name) + 2);
 891         if (!path)
 892                 return NULL;
 893         strcpy(path, dir);
 894         if (dir[strlen(dir) - 1] != '/')
 895                 strcat(path, "/");
 896         strcat(path, name);
 897         return path;
 898 }
 899
 900 static int traverse_directory(struct btrfs_trans_handle *trans,
 901                               struct btrfs_root *root, char *dir_name,
 902                               struct directory_name_entry *dir_head, int out_fd)
 903 {
 904         int ret = 0;
 905
 906         struct btrfs_inode_item cur_inode;
 907         struct btrfs_inode_item *inode_item;
 908         int count, i, dir_index_cnt;
 909         struct direct **files;
 910         struct stat st;
 911         struct directory_name_entry *dir_entry, *parent_dir_entry;
 912         struct direct *cur_file;
 913         ino_t parent_inum, cur_inum;
 914         ino_t highest_inum = 0;
 915         char *parent_dir_name;
 916         struct btrfs_path path;
 917         struct extent_buffer *leaf;
 918         struct btrfs_key root_dir_key;
 919         u64 root_dir_inode_size = 0;
 920
 921         /* Add list for source directory */
 922         dir_entry = malloc(sizeof(struct directory_name_entry));
 923         dir_entry->dir_name = dir_name;
 924         dir_entry->path = strdup(dir_name);
 925
 926         parent_inum = highest_inum + BTRFS_FIRST_FREE_OBJECTID;
 927         dir_entry->inum = parent_inum;
 928         list_add_tail(&dir_entry->list, &dir_head->list);
 929
 930         btrfs_init_path(&path);
 931
 932         root_dir_key.objectid = btrfs_root_dirid(&root->root_item);
 933         root_dir_key.offset = 0;
 934         btrfs_set_key_type(&root_dir_key, BTRFS_INODE_ITEM_KEY);
 935         ret = btrfs_lookup_inode(trans, root, &path, &root_dir_key, 1);
 936         if (ret) {
 937                 fprintf(stderr, "root dir lookup error\n");
 938                 return -1;
 939         }
 940
 941         leaf = path.nodes[0];
 942         inode_item = btrfs_item_ptr(leaf, path.slots[0],
 943                                     struct btrfs_inode_item);
 944
 945         root_dir_inode_size = calculate_dir_inode_size(dir_name);
 946         btrfs_set_inode_size(leaf, inode_item, root_dir_inode_size);
 947         btrfs_mark_buffer_dirty(leaf);
 948
 949         btrfs_release_path(root, &path);
 950
 951         do {
 952                 parent_dir_entry = list_entry(dir_head->list.next,
 953                                               struct directory_name_entry,
 954                                               list);
 955                 list_del(&parent_dir_entry->list);
 956
 957                 parent_inum = parent_dir_entry->inum;
 958                 parent_dir_name = parent_dir_entry->dir_name;
 959                 if (chdir(parent_dir_entry->path)) {
 960                         fprintf(stderr, "chdir error for %s\n",
 961                                 parent_dir_name);
 962                         goto fail_no_files;
 963                 }
 964
 965                 count = scandir(parent_dir_entry->path, &files,
 966                                 directory_select, NULL);
 967                 if (count == -1)
 968                 {
 969                         fprintf(stderr, "scandir for %s failed: %s\n",
 970                                 parent_dir_name, strerror (errno));
 971                         goto fail;
 972                 }
 973
 974                 for (i = 0; i < count; i++) {
 975                         cur_file = files[i];
 976
 977                         if (lstat(cur_file->d_name, &st) == -1) {
 978                                 fprintf(stderr, "lstat failed for file %s\n",
 979                                         cur_file->d_name);
 980                                 goto fail;
 981                         }
 982
 983                         cur_inum = ++highest_inum + BTRFS_FIRST_FREE_OBJECTID;
 984                         ret = add_directory_items(trans, root,
 985                                                   cur_inum, parent_inum,
 986                                                   cur_file->d_name,
 987                                                   &st, &dir_index_cnt);
 988                         if (ret) {
 989                                 fprintf(stderr, "add_directory_items failed\n");
 990                                 goto fail;
 991                         }
 992
 993                         ret = add_inode_items(trans, root, &st,
 994                                               cur_file->d_name, cur_inum,
 995                                               parent_inum, dir_index_cnt,
 996                                               &cur_inode);
 997                         if (ret) {
 998                                 fprintf(stderr, "add_inode_items failed\n");
 999                                 goto fail;
1000                         }
1001
1002                         ret = add_xattr_item(trans, root,
1003                                              cur_inum, cur_file->d_name);
1004                         if (ret) {
1005                                 fprintf(stderr, "add_xattr_item failed\n");
1006                                 if(ret != -ENOTSUP)
1007                                         goto fail;
1008                         }
1009
1010                         if (S_ISDIR(st.st_mode)) {
1011                                 dir_entry = malloc(sizeof(struct directory_name_entry));
1012                                 dir_entry->dir_name = cur_file->d_name;
1013                                 dir_entry->path = make_path(parent_dir_entry->path,
1014                                                             cur_file->d_name);
1015                                 dir_entry->inum = cur_inum;
1016                                 list_add_tail(&dir_entry->list, &dir_head->list);
1017                         } else if (S_ISREG(st.st_mode)) {
1018                                 ret = add_file_items(trans, root, &cur_inode,
1019                                                      cur_inum, parent_inum, &st,
1020                                                      cur_file->d_name, out_fd);
1021                                 if (ret) {
1022                                         fprintf(stderr, "add_file_items failed\n");
1023                                         goto fail;
1024                                 }
1025                         } else if (S_ISLNK(st.st_mode)) {
1026                                 ret = add_symbolic_link(trans, root,
1027                                                         cur_inum, cur_file->d_name);
1028                                 if (ret) {
1029                                         fprintf(stderr, "add_symbolic_link failed\n");
1030                                         goto fail;
1031                                 }
1032                         }
1033                 }
1034
1035                 free_namelist(files, count);
1036                 free(parent_dir_entry->path);
1037                 free(parent_dir_entry);
1038
1039                 index_cnt = 2;
1040
1041         } while (!list_empty(&dir_head->list));
1042
1043         return 0;
1044 fail:
1045         free_namelist(files, count);
1046 fail_no_files:
1047         free(parent_dir_entry->path);
1048         free(parent_dir_entry);
1049         return -1;
1050 }
1051
1052 static int open_target(char *output_name)
1053 {
1054         int output_fd;
1055         output_fd = open(output_name, O_CREAT | O_RDWR | O_TRUNC,
1056                          S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
1057
1058         return output_fd;
1059 }
1060
1061 static int create_chunks(struct btrfs_trans_handle *trans,
1062                          struct btrfs_root *root, u64 num_of_meta_chunks,
1063                          u64 size_of_data)
1064 {
1065         u64 chunk_start;
1066         u64 chunk_size;
1067         u64 meta_type = BTRFS_BLOCK_GROUP_METADATA;
1068         u64 data_type = BTRFS_BLOCK_GROUP_DATA;
1069         u64 minimum_data_chunk_size = 8 * 1024 * 1024;
1070         u64 i;
1071         int ret;
1072
1073         for (i = 0; i < num_of_meta_chunks; i++) {
1074                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
1075                                         &chunk_start, &chunk_size, meta_type);
1076                 BUG_ON(ret);
1077                 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1078                                              meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1079                                              chunk_start, chunk_size);
1080                 BUG_ON(ret);
1081                 set_extent_dirty(&root->fs_info->free_space_cache,
1082                                  chunk_start, chunk_start + chunk_size - 1, 0);
1083         }
1084
1085         if (size_of_data < minimum_data_chunk_size)
1086                 size_of_data = minimum_data_chunk_size;
1087         ret = btrfs_alloc_data_chunk(trans, root->fs_info->extent_root,
1088                                      &chunk_start, size_of_data, data_type);
1089         BUG_ON(ret);
1090         ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1091                                      data_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1092                                      chunk_start, size_of_data);
1093         BUG_ON(ret);
1094         set_extent_dirty(&root->fs_info->free_space_cache,
1095                          chunk_start, chunk_start + size_of_data - 1, 0);
1096         return ret;
1097 }
1098
1099 static int make_image(char *source_dir, struct btrfs_root *root, int out_fd)
1100 {
1101         int ret;
1102         struct btrfs_trans_handle *trans;
1103
1104         struct stat root_st;
1105
1106         struct directory_name_entry dir_head;
1107
1108         ret = lstat(source_dir, &root_st);
1109         if (ret) {
1110                 fprintf(stderr, "unable to lstat the %s\n", source_dir);
1111                 goto fail;
1112         }
1113
1114         INIT_LIST_HEAD(&dir_head.list);
1115
1116         trans = btrfs_start_transaction(root, 1);
1117         ret = traverse_directory(trans, root, source_dir, &dir_head, out_fd);
1118         if (ret) {
1119                 fprintf(stderr, "unable to traverse_directory\n");
1120                 goto fail;
1121         }
1122         btrfs_commit_transaction(trans, root);
1123
1124         printf("Making image is completed.\n");
1125         return 0;
1126 fail:
1127         fprintf(stderr, "Making image is aborted.\n");
1128         return -1;
1129 }
1130
1131 static u64 size_sourcedir(char *dir_name, u64 sectorsize,
1132                           u64 *num_of_meta_chunks_ret, u64 *size_of_data_ret)
1133 {
1134         u64 dir_size = 0;
1135         u64 total_size = 0;
1136         int ret;
1137         char command[1024];
1138         char path[512];
1139         char *file_name = "temp_file";
1140         FILE *file;
1141         u64 default_chunk_size = 8 * 1024 * 1024;       /* 8MB */
1142         u64 allocated_meta_size = 8 * 1024 * 1024;      /* 8MB */
1143         u64 allocated_total_size = 20 * 1024 * 1024;    /* 20MB */
1144         u64 num_of_meta_chunks = 0;
1145         u64 num_of_allocated_meta_chunks =
1146                         allocated_meta_size / default_chunk_size;
1147
1148         ret = sprintf(command, "du -B 4096 -s ");
1149         if (ret < 0) {
1150                 fprintf(stderr, "error executing sprintf for du command\n");
1151                 return -1;
1152         }
1153         strcat(command, dir_name);
1154         strcat(command, " > ");
1155         strcat(command, file_name);
1156         ret = system(command);
1157
1158         file = fopen(file_name, "r");
1159         ret = fscanf(file, "%lld %s\n", &dir_size, path);
1160         fclose(file);
1161         remove(file_name);
1162
1163         dir_size *= sectorsize;
1164         *size_of_data_ret = dir_size;
1165
1166         num_of_meta_chunks = (dir_size / 2) / default_chunk_size;
1167         if (((dir_size / 2) % default_chunk_size) != 0)
1168                 num_of_meta_chunks++;
1169         if (num_of_meta_chunks <= num_of_allocated_meta_chunks)
1170                 num_of_meta_chunks = 0;
1171         else
1172                 num_of_meta_chunks -= num_of_allocated_meta_chunks;
1173
1174         total_size = allocated_total_size + dir_size +
1175                      (num_of_meta_chunks * default_chunk_size);
1176
1177         *num_of_meta_chunks_ret = num_of_meta_chunks;
1178
1179         return total_size;
1180 }
1181
1182 static int zero_output_file(int out_fd, u64 size, u32 sectorsize)
1183 {
1184         int len = sectorsize;
1185         int loop_num = size / sectorsize;
1186         u64 location = 0;
1187         char *buf = malloc(len);
1188         int ret = 0, i;
1189         ssize_t written;
1190
1191         if (!buf)
1192                 return -ENOMEM;
1193         memset(buf, 0, len);
1194         for (i = 0; i < loop_num; i++) {
1195                 written = pwrite64(out_fd, buf, len, location);
1196                 if (written != len)
1197                         ret = -EIO;
1198                 location += sectorsize;
1199         }
1200         free(buf);
1201         return ret;
1202 }
1203
1204 int main(int ac, char **av)
1205 {
1206         char *file;
1207         struct btrfs_root *root;
1208         struct btrfs_trans_handle *trans;
1209         char *label = NULL;
1210         char *first_file;
1211         u64 block_count = 0;
1212         u64 dev_block_count = 0;
1213         u64 blocks[7];
1214         u64 alloc_start = 0;
1215         u64 metadata_profile = 0;
1216         u64 data_profile = 0;
1217         u32 leafsize = getpagesize();
1218         u32 sectorsize = 4096;
1219         u32 nodesize = leafsize;
1220         u32 stripesize = 4096;
1221         int zero_end = 1;
1222         int option_index = 0;
1223         int fd;
1224         int ret;
1225         int i;
1226         int mixed = 0;
1227         int data_profile_opt = 0;
1228         int metadata_profile_opt = 0;
1229         int nodiscard = 0;
1230
1231         char *source_dir = NULL;
1232         int source_dir_set = 0;
1233         u64 num_of_meta_chunks = 0;
1234         u64 size_of_data = 0;
1235         u64 source_dir_size = 0;
1236         char *pretty_buf;
1237
1238         while(1) {
1239                 int c;
1240                 c = getopt_long(ac, av, "A:b:l:n:s:m:d:L:r:VMK", long_options,
1241                                 &option_index);
1242                 if (c < 0)
1243                         break;
1244                 switch(c) {
1245                         case 'A':
1246                                 alloc_start = parse_size(optarg);
1247                                 break;
1248                         case 'd':
1249                                 data_profile = parse_profile(optarg);
1250                                 data_profile_opt = 1;
1251                                 break;
1252                         case 'l':
1253                         case 'n':
1254                                 nodesize = parse_size(optarg);
1255                                 leafsize = parse_size(optarg);
1256                                 break;
1257                         case 'L':
1258                                 label = parse_label(optarg);
1259                                 break;
1260                         case 'm':
1261                                 metadata_profile = parse_profile(optarg);
1262                                 metadata_profile_opt = 1;
1263                                 break;
1264                         case 'M':
1265                                 mixed = 1;
1266                                 break;
1267                         case 's':
1268                                 sectorsize = parse_size(optarg);
1269                                 break;
1270                         case 'b':
1271                                 block_count = parse_size(optarg);
1272                                 if (block_count <= 1024*1024*1024) {
1273                                         printf("SMALL VOLUME: forcing mixed "
1274                                                "metadata/data groups\n");
1275                                         mixed = 1;
1276                                 }
1277                                 zero_end = 0;
1278                                 break;
1279                         case 'V':
1280                                 print_version();
1281                                 break;
1282                         case 'r':
1283                                 source_dir = optarg;
1284                                 source_dir_set = 1;
1285                                 break;
1286                         case 'K':
1287                                 nodiscard=1;
1288                                 break;
1289                         default:
1290                                 print_usage();
1291                 }
1292         }
1293         sectorsize = max(sectorsize, (u32)getpagesize());
1294         if (leafsize < sectorsize || (leafsize & (sectorsize - 1))) {
1295                 fprintf(stderr, "Illegal leafsize %u\n", leafsize);
1296                 exit(1);
1297         }
1298         if (nodesize < sectorsize || (nodesize & (sectorsize - 1))) {
1299                 fprintf(stderr, "Illegal nodesize %u\n", nodesize);
1300                 exit(1);
1301         }
1302         ac = ac - optind;
1303         if (ac == 0)
1304                 print_usage();
1305
1306         printf("\nWARNING! - %s IS EXPERIMENTAL\n", BTRFS_BUILD_VERSION);
1307         printf("WARNING! - see http://btrfs.wiki.kernel.org before using\n\n");
1308
1309         if (source_dir == 0) {
1310                 file = av[optind++];
1311                 ret = check_mounted(file);
1312                 if (ret < 0) {
1313                         fprintf(stderr, "error checking %s mount status\n", file);
1314                         exit(1);
1315                 }
1316                 if (ret == 1) {
1317                         fprintf(stderr, "%s is mounted\n", file);
1318                         exit(1);
1319                 }
1320                 ac--;
1321                 fd = open(file, O_RDWR);
1322                 if (fd < 0) {
1323                         fprintf(stderr, "unable to open %s\n", file);
1324                         exit(1);
1325                 }
1326                 first_file = file;
1327                 ret = __btrfs_prepare_device(fd, file, zero_end,
1328                                 &dev_block_count, &mixed, nodiscard);
1329                 if (block_count == 0)
1330                         block_count = dev_block_count;
1331                 else if (block_count > dev_block_count) {
1332                         fprintf(stderr, "%s is smaller than requested size\n", file);
1333                         exit(1);
1334                 }
1335         } else {
1336                 ac = 0;
1337                 file = av[optind++];
1338                 fd = open_target(file);
1339                 if (fd < 0) {
1340                         fprintf(stderr, "unable to open the %s\n", file);
1341                         exit(1);
1342                 }
1343
1344                 first_file = file;
1345                 source_dir_size = size_sourcedir(source_dir, sectorsize,
1346                                              &num_of_meta_chunks, &size_of_data);
1347                 if(block_count < source_dir_size)
1348                         block_count = source_dir_size;
1349                 ret = zero_output_file(fd, block_count, sectorsize);
1350                 if (ret) {
1351                         fprintf(stderr, "unable to zero the output file\n");
1352                         exit(1);
1353                 }
1354         }
1355         if (mixed) {
1356                 if (metadata_profile != data_profile) {
1357                         fprintf(stderr, "With mixed block groups data and metadata "
1358                                 "profiles must be the same\n");
1359                         exit(1);
1360                 }
1361         }
1362
1363         blocks[0] = BTRFS_SUPER_INFO_OFFSET;
1364         for (i = 1; i < 7; i++) {
1365                 blocks[i] = BTRFS_SUPER_INFO_OFFSET + 1024 * 1024 +
1366                         leafsize * i;
1367         }
1368
1369         ret = make_btrfs(fd, file, label, blocks, block_count,
1370                          nodesize, leafsize,
1371                          sectorsize, stripesize);
1372         if (ret) {
1373                 fprintf(stderr, "error during mkfs %d\n", ret);
1374                 exit(1);
1375         }
1376
1377         root = open_ctree(file, 0, O_RDWR);
1378         if (!root) {
1379                 fprintf(stderr, "ctree init failed\n");
1380                 exit(1);
1381         }
1382         root->fs_info->alloc_start = alloc_start;
1383
1384         ret = make_root_dir(root, mixed);
1385         if (ret) {
1386                 fprintf(stderr, "failed to setup the root directory\n");
1387                 exit(1);
1388         }
1389
1390         trans = btrfs_start_transaction(root, 1);
1391
1392         if (ac == 0)
1393                 goto raid_groups;
1394
1395         btrfs_register_one_device(file);
1396
1397         zero_end = 1;
1398         while(ac-- > 0) {
1399                 int old_mixed = mixed;
1400
1401                 file = av[optind++];
1402                 ret = check_mounted(file);
1403                 if (ret < 0) {
1404                         fprintf(stderr, "error checking %s mount status\n",
1405                                 file);
1406                         exit(1);
1407                 }
1408                 if (ret == 1) {
1409                         fprintf(stderr, "%s is mounted\n", file);
1410                         exit(1);
1411                 }
1412                 fd = open(file, O_RDWR);
1413                 if (fd < 0) {
1414                         fprintf(stderr, "unable to open %s\n", file);
1415                         exit(1);
1416                 }
1417                 ret = btrfs_device_already_in_root(root, fd,
1418                                                    BTRFS_SUPER_INFO_OFFSET);
1419                 if (ret) {
1420                         fprintf(stderr, "skipping duplicate device %s in FS\n",
1421                                 file);
1422                         close(fd);
1423                         continue;
1424                 }
1425                 dev_block_count = block_count;
1426                 ret = __btrfs_prepare_device(fd, file, zero_end,
1427                                            &dev_block_count, &mixed, nodiscard);
1428                 mixed = old_mixed;
1429                 BUG_ON(ret);
1430
1431                 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
1432                                         sectorsize, sectorsize, sectorsize);
1433                 BUG_ON(ret);
1434                 btrfs_register_one_device(file);
1435         }
1436
1437 raid_groups:
1438         if (!source_dir_set) {
1439                 ret = create_raid_groups(trans, root, data_profile,
1440                                  data_profile_opt, metadata_profile,
1441                                  metadata_profile_opt, mixed);
1442                 BUG_ON(ret);
1443         }
1444
1445         ret = create_data_reloc_tree(trans, root);
1446         BUG_ON(ret);
1447
1448         if (mixed) {
1449                 struct btrfs_super_block *super = &root->fs_info->super_copy;
1450                 u64 flags = btrfs_super_incompat_flags(super);
1451
1452                 flags |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
1453                 btrfs_set_super_incompat_flags(super, flags);
1454         }
1455
1456         printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
1457             "sectorsize %u size %s\n",
1458             label, first_file, nodesize, leafsize, sectorsize,
1459             pretty_buf = pretty_sizes(btrfs_super_total_bytes(&root->fs_info->super_copy)));
1460         free(pretty_buf);
1461
1462         printf("%s\n", BTRFS_BUILD_VERSION);
1463         btrfs_commit_transaction(trans, root);
1464
1465         if (source_dir_set) {
1466                 trans = btrfs_start_transaction(root, 1);
1467                 ret = create_chunks(trans, root,
1468                                     num_of_meta_chunks, size_of_data);
1469                 BUG_ON(ret);
1470                 btrfs_commit_transaction(trans, root);
1471
1472                 ret = make_image(source_dir, root, fd);
1473                 BUG_ON(ret);
1474         }
1475
1476         ret = close_ctree(root);
1477         BUG_ON(ret);
1478
1479         free(label);
1480         return 0;
1481 }
1482