mkfs/main.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 #include "kerncompat.h"
  20 #include "androidcompat.h"
  21
  22 #include <sys/ioctl.h>
  23 #include <sys/mount.h>
  24 #include "ioctl.h"
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 /* #include <sys/dir.h> included via androidcompat.h */
  28 #include <fcntl.h>
  29 #include <unistd.h>
  30 #include <getopt.h>
  31 #include <uuid/uuid.h>
  32 #include <ctype.h>
  33 #include <blkid/blkid.h>
  34 #include "ctree.h"
  35 #include "disk-io.h"
  36 #include "volumes.h"
  37 #include "transaction.h"
  38 #include "utils.h"
  39 #include "list_sort.h"
  40 #include "help.h"
  41 #include "mkfs/common.h"
  42 #include "mkfs/rootdir.h"
  43 #include "fsfeatures.h"
  44
  45 static int verbose = 1;
  46
  47 struct mkfs_allocation {
  48         u64 data;
  49         u64 metadata;
  50         u64 mixed;
  51         u64 system;
  52 };
  53
  54 static int create_metadata_block_groups(struct btrfs_root *root, int mixed,
  55                                 struct mkfs_allocation *allocation)
  56 {
  57         struct btrfs_fs_info *fs_info = root->fs_info;
  58         struct btrfs_trans_handle *trans;
  59         u64 bytes_used;
  60         u64 chunk_start = 0;
  61         u64 chunk_size = 0;
  62         int ret;
  63
  64         trans = btrfs_start_transaction(root, 1);
  65         BUG_ON(IS_ERR(trans));
  66         bytes_used = btrfs_super_bytes_used(fs_info->super_copy);
  67
  68         root->fs_info->system_allocs = 1;
  69         /*
  70          * First temporary system chunk must match the chunk layout
  71          * created in make_btrfs().
  72          */
  73         ret = btrfs_make_block_group(trans, fs_info, bytes_used,
  74                                      BTRFS_BLOCK_GROUP_SYSTEM,
  75                                      BTRFS_FIRST_CHUNK_TREE_OBJECTID,
  76                                      BTRFS_BLOCK_RESERVED_1M_FOR_SUPER,
  77                                      BTRFS_MKFS_SYSTEM_GROUP_SIZE);
  78         allocation->system += BTRFS_MKFS_SYSTEM_GROUP_SIZE;
  79         if (ret)
  80                 return ret;
  81
  82         if (mixed) {
  83                 ret = btrfs_alloc_chunk(trans, fs_info,
  84                                         &chunk_start, &chunk_size,
  85                                         BTRFS_BLOCK_GROUP_METADATA |
  86                                         BTRFS_BLOCK_GROUP_DATA);
  87                 if (ret == -ENOSPC) {
  88                         error("no space to allocate data/metadata chunk");
  89                         goto err;
  90                 }
  91                 if (ret)
  92                         return ret;
  93                 ret = btrfs_make_block_group(trans, fs_info, 0,
  94                                              BTRFS_BLOCK_GROUP_METADATA |
  95                                              BTRFS_BLOCK_GROUP_DATA,
  96                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
  97                                              chunk_start, chunk_size);
  98                 if (ret)
  99                         return ret;
 100                 allocation->mixed += chunk_size;
 101         } else {
 102                 ret = btrfs_alloc_chunk(trans, fs_info,
 103                                         &chunk_start, &chunk_size,
 104                                         BTRFS_BLOCK_GROUP_METADATA);
 105                 if (ret == -ENOSPC) {
 106                         error("no space to allocate metadata chunk");
 107                         goto err;
 108                 }
 109                 if (ret)
 110                         return ret;
 111                 ret = btrfs_make_block_group(trans, fs_info, 0,
 112                                              BTRFS_BLOCK_GROUP_METADATA,
 113                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 114                                              chunk_start, chunk_size);
 115                 allocation->metadata += chunk_size;
 116                 if (ret)
 117                         return ret;
 118         }
 119
 120         root->fs_info->system_allocs = 0;
 121         ret = btrfs_commit_transaction(trans, root);
 122
 123 err:
 124         return ret;
 125 }
 126
 127 static int create_data_block_groups(struct btrfs_trans_handle *trans,
 128                 struct btrfs_root *root, int mixed,
 129                 struct mkfs_allocation *allocation)
 130 {
 131         struct btrfs_fs_info *fs_info = root->fs_info;
 132         u64 chunk_start = 0;
 133         u64 chunk_size = 0;
 134         int ret = 0;
 135
 136         if (!mixed) {
 137                 ret = btrfs_alloc_chunk(trans, fs_info,
 138                                         &chunk_start, &chunk_size,
 139                                         BTRFS_BLOCK_GROUP_DATA);
 140                 if (ret == -ENOSPC) {
 141                         error("no space to allocate data chunk");
 142                         goto err;
 143                 }
 144                 if (ret)
 145                         return ret;
 146                 ret = btrfs_make_block_group(trans, fs_info, 0,
 147                                              BTRFS_BLOCK_GROUP_DATA,
 148                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 149                                              chunk_start, chunk_size);
 150                 allocation->data += chunk_size;
 151                 if (ret)
 152                         return ret;
 153         }
 154
 155 err:
 156         return ret;
 157 }
 158
 159 static int make_root_dir(struct btrfs_trans_handle *trans,
 160                 struct btrfs_root *root)
 161 {
 162         struct btrfs_key location;
 163         int ret;
 164
 165         ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
 166                               BTRFS_ROOT_TREE_DIR_OBJECTID);
 167         if (ret)
 168                 goto err;
 169         ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
 170         if (ret)
 171                 goto err;
 172         memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
 173         location.offset = (u64)-1;
 174         ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
 175                         "default", 7,
 176                         btrfs_super_root_dir(root->fs_info->super_copy),
 177                         &location, BTRFS_FT_DIR, 0);
 178         if (ret)
 179                 goto err;
 180
 181         ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
 182                              "default", 7, location.objectid,
 183                              BTRFS_ROOT_TREE_DIR_OBJECTID, 0);
 184         if (ret)
 185                 goto err;
 186
 187 err:
 188         return ret;
 189 }
 190
 191 static int __recow_root(struct btrfs_trans_handle *trans,
 192                          struct btrfs_root *root)
 193 {
 194         struct extent_buffer *tmp;
 195         int ret;
 196
 197         if (trans->transid != btrfs_root_generation(&root->root_item)) {
 198                 extent_buffer_get(root->node);
 199                 ret = __btrfs_cow_block(trans, root, root->node,
 200                                         NULL, 0, &tmp, 0, 0);
 201                 if (ret)
 202                         return ret;
 203                 free_extent_buffer(tmp);
 204         }
 205
 206         return 0;
 207 }
 208
 209 static int recow_roots(struct btrfs_trans_handle *trans,
 210                        struct btrfs_root *root)
 211 {
 212         struct btrfs_fs_info *info = root->fs_info;
 213         int ret;
 214
 215         ret = __recow_root(trans, info->fs_root);
 216         if (ret)
 217                 return ret;
 218         ret = __recow_root(trans, info->tree_root);
 219         if (ret)
 220                 return ret;
 221         ret = __recow_root(trans, info->extent_root);
 222         if (ret)
 223                 return ret;
 224         ret = __recow_root(trans, info->chunk_root);
 225         if (ret)
 226                 return ret;
 227         ret = __recow_root(trans, info->dev_root);
 228         if (ret)
 229                 return ret;
 230         ret = __recow_root(trans, info->csum_root);
 231         if (ret)
 232                 return ret;
 233
 234         return 0;
 235 }
 236
 237 static int create_one_raid_group(struct btrfs_trans_handle *trans,
 238                               struct btrfs_root *root, u64 type,
 239                               struct mkfs_allocation *allocation)
 240
 241 {
 242         struct btrfs_fs_info *fs_info = root->fs_info;
 243         u64 chunk_start;
 244         u64 chunk_size;
 245         int ret;
 246
 247         ret = btrfs_alloc_chunk(trans, fs_info,
 248                                 &chunk_start, &chunk_size, type);
 249         if (ret == -ENOSPC) {
 250                 error("not enough free space to allocate chunk");
 251                 exit(1);
 252         }
 253         if (ret)
 254                 return ret;
 255
 256         ret = btrfs_make_block_group(trans, fs_info, 0,
 257                                      type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 258                                      chunk_start, chunk_size);
 259
 260         type &= BTRFS_BLOCK_GROUP_TYPE_MASK;
 261         if (type == BTRFS_BLOCK_GROUP_DATA) {
 262                 allocation->data += chunk_size;
 263         } else if (type == BTRFS_BLOCK_GROUP_METADATA) {
 264                 allocation->metadata += chunk_size;
 265         } else if (type == BTRFS_BLOCK_GROUP_SYSTEM) {
 266                 allocation->system += chunk_size;
 267         } else if (type ==
 268                         (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA)) {
 269                 allocation->mixed += chunk_size;
 270         } else {
 271                 error("unrecognized profile type: 0x%llx",
 272                                 (unsigned long long)type);
 273                 ret = -EINVAL;
 274         }
 275
 276         return ret;
 277 }
 278
 279 static int create_raid_groups(struct btrfs_trans_handle *trans,
 280                               struct btrfs_root *root, u64 data_profile,
 281                               u64 metadata_profile, int mixed,
 282                               struct mkfs_allocation *allocation)
 283 {
 284         int ret;
 285
 286         if (metadata_profile) {
 287                 u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA;
 288
 289                 ret = create_one_raid_group(trans, root,
 290                                             BTRFS_BLOCK_GROUP_SYSTEM |
 291                                             metadata_profile, allocation);
 292                 if (ret)
 293                         return ret;
 294
 295                 if (mixed)
 296                         meta_flags |= BTRFS_BLOCK_GROUP_DATA;
 297
 298                 ret = create_one_raid_group(trans, root, meta_flags |
 299                                             metadata_profile, allocation);
 300                 if (ret)
 301                         return ret;
 302
 303         }
 304         if (!mixed && data_profile) {
 305                 ret = create_one_raid_group(trans, root,
 306                                             BTRFS_BLOCK_GROUP_DATA |
 307                                             data_profile, allocation);
 308                 if (ret)
 309                         return ret;
 310         }
 311         ret = recow_roots(trans, root);
 312
 313         return ret;
 314 }
 315
 316 static int create_tree(struct btrfs_trans_handle *trans,
 317                         struct btrfs_root *root, u64 objectid)
 318 {
 319         struct btrfs_key location;
 320         struct btrfs_root_item root_item;
 321         struct extent_buffer *tmp;
 322         int ret;
 323
 324         ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
 325         if (ret)
 326                 return ret;
 327
 328         memcpy(&root_item, &root->root_item, sizeof(root_item));
 329         btrfs_set_root_bytenr(&root_item, tmp->start);
 330         btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
 331         btrfs_set_root_generation(&root_item, trans->transid);
 332         free_extent_buffer(tmp);
 333
 334         location.objectid = objectid;
 335         location.type = BTRFS_ROOT_ITEM_KEY;
 336         location.offset = 0;
 337         ret = btrfs_insert_root(trans, root->fs_info->tree_root,
 338                                 &location, &root_item);
 339
 340         return ret;
 341 }
 342
 343 static void print_usage(int ret)
 344 {
 345         printf("Usage: mkfs.btrfs [options] dev [ dev ... ]\n");
 346         printf("Options:\n");
 347         printf("  allocation profiles:\n");
 348         printf("\t-d|--data PROFILE       data profile, raid0, raid1, raid5, raid6, raid10, dup or single\n");
 349         printf("\t-m|--metadata PROFILE   metadata profile, values like for data profile\n");
 350         printf("\t-M|--mixed              mix metadata and data together\n");
 351         printf("  features:\n");
 352         printf("\t-n|--nodesize SIZE      size of btree nodes\n");
 353         printf("\t-s|--sectorsize SIZE    data block size (may not be mountable by current kernel)\n");
 354         printf("\t-O|--features LIST      comma separated list of filesystem features (use '-O list-all' to list features)\n");
 355         printf("\t-L|--label LABEL        set the filesystem label\n");
 356         printf("\t-U|--uuid UUID          specify the filesystem UUID (must be unique)\n");
 357         printf("  creation:\n");
 358         printf("\t-b|--byte-count SIZE    set filesystem size to SIZE (on the first device)\n");
 359         printf("\t-r|--rootdir DIR        copy files from DIR to the image root directory\n");
 360         printf("\t--shrink                (with --rootdir) shrink the filled filesystem to minimal size\n");
 361         printf("\t-K|--nodiscard          do not perform whole device TRIM\n");
 362         printf("\t-f|--force              force overwrite of existing filesystem\n");
 363         printf("  general:\n");
 364         printf("\t-q|--quiet              no messages except errors\n");
 365         printf("\t-V|--version            print the mkfs.btrfs version and exit\n");
 366         printf("\t--help                  print this help and exit\n");
 367         printf("  deprecated:\n");
 368         printf("\t-A|--alloc-start START  the offset to start the filesystem\n");
 369         printf("\t-l|--leafsize SIZE      deprecated, alias for nodesize\n");
 370         exit(ret);
 371 }
 372
 373 static u64 parse_profile(const char *s)
 374 {
 375         if (strcasecmp(s, "raid0") == 0) {
 376                 return BTRFS_BLOCK_GROUP_RAID0;
 377         } else if (strcasecmp(s, "raid1") == 0) {
 378                 return BTRFS_BLOCK_GROUP_RAID1;
 379         } else if (strcasecmp(s, "raid5") == 0) {
 380                 return BTRFS_BLOCK_GROUP_RAID5;
 381         } else if (strcasecmp(s, "raid6") == 0) {
 382                 return BTRFS_BLOCK_GROUP_RAID6;
 383         } else if (strcasecmp(s, "raid10") == 0) {
 384                 return BTRFS_BLOCK_GROUP_RAID10;
 385         } else if (strcasecmp(s, "dup") == 0) {
 386                 return BTRFS_BLOCK_GROUP_DUP;
 387         } else if (strcasecmp(s, "single") == 0) {
 388                 return 0;
 389         } else {
 390                 error("unknown profile %s", s);
 391                 exit(1);
 392         }
 393         /* not reached */
 394         return 0;
 395 }
 396
 397 static char *parse_label(const char *input)
 398 {
 399         int len = strlen(input);
 400
 401         if (len >= BTRFS_LABEL_SIZE) {
 402                 error("label %s is too long (max %d)", input,
 403                         BTRFS_LABEL_SIZE - 1);
 404                 exit(1);
 405         }
 406         return strdup(input);
 407 }
 408
 409 static int zero_output_file(int out_fd, u64 size)
 410 {
 411         int loop_num;
 412         u64 location = 0;
 413         char buf[SZ_4K];
 414         int ret = 0, i;
 415         ssize_t written;
 416
 417         memset(buf, 0, SZ_4K);
 418
 419         /* Only zero out the first 1M */
 420         loop_num = SZ_1M / SZ_4K;
 421         for (i = 0; i < loop_num; i++) {
 422                 written = pwrite64(out_fd, buf, SZ_4K, location);
 423                 if (written != SZ_4K)
 424                         ret = -EIO;
 425                 location += SZ_4K;
 426         }
 427
 428         /* Then enlarge the file to size */
 429         written = pwrite64(out_fd, buf, 1, size - 1);
 430         if (written < 1)
 431                 ret = -EIO;
 432         return ret;
 433 }
 434
 435 static int is_ssd(const char *file)
 436 {
 437         blkid_probe probe;
 438         char wholedisk[PATH_MAX];
 439         char sysfs_path[PATH_MAX];
 440         dev_t devno;
 441         int fd;
 442         char rotational;
 443         int ret;
 444
 445         probe = blkid_new_probe_from_filename(file);
 446         if (!probe)
 447                 return 0;
 448
 449         /* Device number of this disk (possibly a partition) */
 450         devno = blkid_probe_get_devno(probe);
 451         if (!devno) {
 452                 blkid_free_probe(probe);
 453                 return 0;
 454         }
 455
 456         /* Get whole disk name (not full path) for this devno */
 457         ret = blkid_devno_to_wholedisk(devno,
 458                         wholedisk, sizeof(wholedisk), NULL);
 459         if (ret) {
 460                 blkid_free_probe(probe);
 461                 return 0;
 462         }
 463
 464         snprintf(sysfs_path, PATH_MAX, "/sys/block/%s/queue/rotational",
 465                  wholedisk);
 466
 467         blkid_free_probe(probe);
 468
 469         fd = open(sysfs_path, O_RDONLY);
 470         if (fd < 0) {
 471                 return 0;
 472         }
 473
 474         if (read(fd, &rotational, 1) < 1) {
 475                 close(fd);
 476                 return 0;
 477         }
 478         close(fd);
 479
 480         return rotational == '0';
 481 }
 482
 483 static int _cmp_device_by_id(void *priv, struct list_head *a,
 484                              struct list_head *b)
 485 {
 486         return list_entry(a, struct btrfs_device, dev_list)->devid -
 487                list_entry(b, struct btrfs_device, dev_list)->devid;
 488 }
 489
 490 static void list_all_devices(struct btrfs_root *root)
 491 {
 492         struct btrfs_fs_devices *fs_devices;
 493         struct btrfs_device *device;
 494         int number_of_devices = 0;
 495         u64 total_block_count = 0;
 496
 497         fs_devices = root->fs_info->fs_devices;
 498
 499         list_for_each_entry(device, &fs_devices->devices, dev_list)
 500                 number_of_devices++;
 501
 502         list_sort(NULL, &fs_devices->devices, _cmp_device_by_id);
 503
 504         printf("Number of devices:  %d\n", number_of_devices);
 505         /* printf("Total devices size: %10s\n", */
 506                 /* pretty_size(total_block_count)); */
 507         printf("Devices:\n");
 508         printf("   ID        SIZE  PATH\n");
 509         list_for_each_entry(device, &fs_devices->devices, dev_list) {
 510                 printf("  %3llu  %10s  %s\n",
 511                         device->devid,
 512                         pretty_size(device->total_bytes),
 513                         device->name);
 514                 total_block_count += device->total_bytes;
 515         }
 516
 517         printf("\n");
 518 }
 519
 520 static int is_temp_block_group(struct extent_buffer *node,
 521                                struct btrfs_block_group_item *bgi,
 522                                u64 data_profile, u64 meta_profile,
 523                                u64 sys_profile)
 524 {
 525         u64 flag = btrfs_disk_block_group_flags(node, bgi);
 526         u64 flag_type = flag & BTRFS_BLOCK_GROUP_TYPE_MASK;
 527         u64 flag_profile = flag & BTRFS_BLOCK_GROUP_PROFILE_MASK;
 528         u64 used = btrfs_disk_block_group_used(node, bgi);
 529
 530         /*
 531          * Chunks meets all the following conditions is a temp chunk
 532          * 1) Empty chunk
 533          * Temp chunk is always empty.
 534          *
 535          * 2) profile mismatch with mkfs profile.
 536          * Temp chunk is always in SINGLE
 537          *
 538          * 3) Size differs with mkfs_alloc
 539          * Special case for SINGLE/SINGLE btrfs.
 540          * In that case, temp data chunk and real data chunk are always empty.
 541          * So we need to use mkfs_alloc to be sure which chunk is the newly
 542          * allocated.
 543          *
 544          * Normally, new chunk size is equal to mkfs one (One chunk)
 545          * If it has multiple chunks, we just refuse to delete any one.
 546          * As they are all single, so no real problem will happen.
 547          * So only use condition 1) and 2) to judge them.
 548          */
 549         if (used != 0)
 550                 return 0;
 551         switch (flag_type) {
 552         case BTRFS_BLOCK_GROUP_DATA:
 553         case BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA:
 554                 data_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
 555                 if (flag_profile != data_profile)
 556                         return 1;
 557                 break;
 558         case BTRFS_BLOCK_GROUP_METADATA:
 559                 meta_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
 560                 if (flag_profile != meta_profile)
 561                         return 1;
 562                 break;
 563         case BTRFS_BLOCK_GROUP_SYSTEM:
 564                 sys_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
 565                 if (flag_profile != sys_profile)
 566                         return 1;
 567                 break;
 568         }
 569         return 0;
 570 }
 571
 572 /* Note: if current is a block group, it will skip it anyway */
 573 static int next_block_group(struct btrfs_root *root,
 574                             struct btrfs_path *path)
 575 {
 576         struct btrfs_key key;
 577         int ret = 0;
 578
 579         while (1) {
 580                 ret = btrfs_next_item(root, path);
 581                 if (ret)
 582                         goto out;
 583
 584                 btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
 585                 if (key.type == BTRFS_BLOCK_GROUP_ITEM_KEY)
 586                         goto out;
 587         }
 588 out:
 589         return ret;
 590 }
 591
 592 /* This function will cleanup  */
 593 static int cleanup_temp_chunks(struct btrfs_fs_info *fs_info,
 594                                struct mkfs_allocation *alloc,
 595                                u64 data_profile, u64 meta_profile,
 596                                u64 sys_profile)
 597 {
 598         struct btrfs_trans_handle *trans = NULL;
 599         struct btrfs_block_group_item *bgi;
 600         struct btrfs_root *root = fs_info->extent_root;
 601         struct btrfs_key key;
 602         struct btrfs_key found_key;
 603         struct btrfs_path path;
 604         int ret = 0;
 605
 606         btrfs_init_path(&path);
 607         trans = btrfs_start_transaction(root, 1);
 608         BUG_ON(IS_ERR(trans));
 609
 610         key.objectid = 0;
 611         key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
 612         key.offset = 0;
 613
 614         while (1) {
 615                 /*
 616                  * as the rest of the loop may modify the tree, we need to
 617                  * start a new search each time.
 618                  */
 619                 ret = btrfs_search_slot(trans, root, &key, &path, 0, 0);
 620                 if (ret < 0)
 621                         goto out;
 622                 /* Don't pollute ret for >0 case */
 623                 if (ret > 0)
 624                         ret = 0;
 625
 626                 btrfs_item_key_to_cpu(path.nodes[0], &found_key,
 627                                       path.slots[0]);
 628                 if (found_key.objectid < key.objectid)
 629                         goto out;
 630                 if (found_key.type != BTRFS_BLOCK_GROUP_ITEM_KEY) {
 631                         ret = next_block_group(root, &path);
 632                         if (ret < 0)
 633                                 goto out;
 634                         if (ret > 0) {
 635                                 ret = 0;
 636                                 goto out;
 637                         }
 638                         btrfs_item_key_to_cpu(path.nodes[0], &found_key,
 639                                               path.slots[0]);
 640                 }
 641
 642                 bgi = btrfs_item_ptr(path.nodes[0], path.slots[0],
 643                                      struct btrfs_block_group_item);
 644                 if (is_temp_block_group(path.nodes[0], bgi,
 645                                         data_profile, meta_profile,
 646                                         sys_profile)) {
 647                         u64 flags = btrfs_disk_block_group_flags(path.nodes[0],
 648                                                              bgi);
 649
 650                         ret = btrfs_free_block_group(trans, fs_info,
 651                                         found_key.objectid, found_key.offset);
 652                         if (ret < 0)
 653                                 goto out;
 654
 655                         if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
 656                             BTRFS_BLOCK_GROUP_DATA)
 657                                 alloc->data -= found_key.offset;
 658                         else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
 659                                  BTRFS_BLOCK_GROUP_METADATA)
 660                                 alloc->metadata -= found_key.offset;
 661                         else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
 662                                  BTRFS_BLOCK_GROUP_SYSTEM)
 663                                 alloc->system -= found_key.offset;
 664                         else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
 665                                  (BTRFS_BLOCK_GROUP_METADATA |
 666                                   BTRFS_BLOCK_GROUP_DATA))
 667                                 alloc->mixed -= found_key.offset;
 668                 }
 669                 btrfs_release_path(&path);
 670                 key.objectid = found_key.objectid + found_key.offset;
 671         }
 672 out:
 673         if (trans)
 674                 btrfs_commit_transaction(trans, root);
 675         btrfs_release_path(&path);
 676         return ret;
 677 }
 678
 679 /*
 680  * Just update chunk allocation info, since --rootdir may allocate new
 681  * chunks which is not updated in @allocation structure.
 682  */
 683 static void update_chunk_allocation(struct btrfs_fs_info *fs_info,
 684                                     struct mkfs_allocation *allocation)
 685 {
 686         struct btrfs_block_group_cache *bg_cache;
 687         const u64 mixed_flag = BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA;
 688         u64 search_start = 0;
 689
 690         allocation->mixed = 0;
 691         allocation->data = 0;
 692         allocation->metadata = 0;
 693         allocation->system = 0;
 694         while (1) {
 695                 bg_cache = btrfs_lookup_first_block_group(fs_info,
 696                                                           search_start);
 697                 if (!bg_cache)
 698                         break;
 699                 if ((bg_cache->flags & mixed_flag) == mixed_flag)
 700                         allocation->mixed += bg_cache->key.offset;
 701                 else if (bg_cache->flags & BTRFS_BLOCK_GROUP_DATA)
 702                         allocation->data += bg_cache->key.offset;
 703                 else if (bg_cache->flags & BTRFS_BLOCK_GROUP_METADATA)
 704                         allocation->metadata += bg_cache->key.offset;
 705                 else
 706                         allocation->system += bg_cache->key.offset;
 707                 search_start = bg_cache->key.objectid + bg_cache->key.offset;
 708         }
 709 }
 710
 711 int main(int argc, char **argv)
 712 {
 713         char *file;
 714         struct btrfs_root *root;
 715         struct btrfs_fs_info *fs_info;
 716         struct btrfs_trans_handle *trans;
 717         char *label = NULL;
 718         u64 block_count = 0;
 719         u64 dev_block_count = 0;
 720         u64 alloc_start = 0;
 721         u64 metadata_profile = 0;
 722         u64 data_profile = 0;
 723         u32 nodesize = max_t(u32, sysconf(_SC_PAGESIZE),
 724                         BTRFS_MKFS_DEFAULT_NODE_SIZE);
 725         u32 sectorsize = 4096;
 726         u32 stripesize = 4096;
 727         int zero_end = 1;
 728         int fd = -1;
 729         int ret = 0;
 730         int close_ret;
 731         int i;
 732         int mixed = 0;
 733         int nodesize_forced = 0;
 734         int data_profile_opt = 0;
 735         int metadata_profile_opt = 0;
 736         int discard = 1;
 737         int ssd = 0;
 738         int force_overwrite = 0;
 739         char *source_dir = NULL;
 740         bool source_dir_set = false;
 741         bool shrink_rootdir = false;
 742         u64 source_dir_size = 0;
 743         u64 min_dev_size;
 744         u64 shrink_size;
 745         int dev_cnt = 0;
 746         int saved_optind;
 747         char fs_uuid[BTRFS_UUID_UNPARSED_SIZE] = { 0 };
 748         u64 features = BTRFS_MKFS_DEFAULT_FEATURES;
 749         struct mkfs_allocation allocation = { 0 };
 750         struct btrfs_mkfs_config mkfs_cfg;
 751
 752         while(1) {
 753                 int c;
 754                 enum { GETOPT_VAL_SHRINK = 257 };
 755                 static const struct option long_options[] = {
 756                         { "alloc-start", required_argument, NULL, 'A'},
 757                         { "byte-count", required_argument, NULL, 'b' },
 758                         { "force", no_argument, NULL, 'f' },
 759                         { "leafsize", required_argument, NULL, 'l' },
 760                         { "label", required_argument, NULL, 'L'},
 761                         { "metadata", required_argument, NULL, 'm' },
 762                         { "mixed", no_argument, NULL, 'M' },
 763                         { "nodesize", required_argument, NULL, 'n' },
 764                         { "sectorsize", required_argument, NULL, 's' },
 765                         { "data", required_argument, NULL, 'd' },
 766                         { "version", no_argument, NULL, 'V' },
 767                         { "rootdir", required_argument, NULL, 'r' },
 768                         { "nodiscard", no_argument, NULL, 'K' },
 769                         { "features", required_argument, NULL, 'O' },
 770                         { "uuid", required_argument, NULL, 'U' },
 771                         { "quiet", 0, NULL, 'q' },
 772                         { "shrink", no_argument, NULL, GETOPT_VAL_SHRINK },
 773                         { "help", no_argument, NULL, GETOPT_VAL_HELP },
 774                         { NULL, 0, NULL, 0}
 775                 };
 776
 777                 c = getopt_long(argc, argv, "A:b:fl:n:s:m:d:L:O:r:U:VMKq",
 778                                 long_options, NULL);
 779                 if (c < 0)
 780                         break;
 781                 switch(c) {
 782                         case 'A':
 783                                 alloc_start = parse_size(optarg);
 784                                 break;
 785                         case 'f':
 786                                 force_overwrite = 1;
 787                                 break;
 788                         case 'd':
 789                                 data_profile = parse_profile(optarg);
 790                                 data_profile_opt = 1;
 791                                 break;
 792                         case 'l':
 793                                 warning("--leafsize is deprecated, use --nodesize");
 794                                 /* fall through */
 795                         case 'n':
 796                                 nodesize = parse_size(optarg);
 797                                 nodesize_forced = 1;
 798                                 break;
 799                         case 'L':
 800                                 label = parse_label(optarg);
 801                                 break;
 802                         case 'm':
 803                                 metadata_profile = parse_profile(optarg);
 804                                 metadata_profile_opt = 1;
 805                                 break;
 806                         case 'M':
 807                                 mixed = 1;
 808                                 break;
 809                         case 'O': {
 810                                 char *orig = strdup(optarg);
 811                                 char *tmp = orig;
 812
 813                                 tmp = btrfs_parse_fs_features(tmp, &features);
 814                                 if (tmp) {
 815                                         error("unrecognized filesystem feature '%s'",
 816                                                         tmp);
 817                                         free(orig);
 818                                         goto error;
 819                                 }
 820                                 free(orig);
 821                                 if (features & BTRFS_FEATURE_LIST_ALL) {
 822                                         btrfs_list_all_fs_features(0);
 823                                         goto success;
 824                                 }
 825                                 break;
 826                                 }
 827                         case 's':
 828                                 sectorsize = parse_size(optarg);
 829                                 break;
 830                         case 'b':
 831                                 block_count = parse_size(optarg);
 832                                 zero_end = 0;
 833                                 break;
 834                         case 'V':
 835                                 printf("mkfs.btrfs, part of %s\n",
 836                                                 PACKAGE_STRING);
 837                                 goto success;
 838                         case 'r':
 839                                 source_dir = optarg;
 840                                 source_dir_set = true;
 841                                 break;
 842                         case 'U':
 843                                 strncpy(fs_uuid, optarg,
 844                                         BTRFS_UUID_UNPARSED_SIZE - 1);
 845                                 break;
 846                         case 'K':
 847                                 discard = 0;
 848                                 break;
 849                         case 'q':
 850                                 verbose = 0;
 851                                 break;
 852                         case GETOPT_VAL_SHRINK:
 853                                 shrink_rootdir = true;
 854                                 break;
 855                         case GETOPT_VAL_HELP:
 856                         default:
 857                                 print_usage(c != GETOPT_VAL_HELP);
 858                 }
 859         }
 860
 861         if (verbose) {
 862                 printf("%s\n", PACKAGE_STRING);
 863                 printf("See %s for more information.\n\n", PACKAGE_URL);
 864         }
 865
 866         sectorsize = max(sectorsize, (u32)sysconf(_SC_PAGESIZE));
 867         stripesize = sectorsize;
 868         saved_optind = optind;
 869         dev_cnt = argc - optind;
 870         if (dev_cnt == 0)
 871                 print_usage(1);
 872
 873         if (source_dir_set && dev_cnt > 1) {
 874                 error("the option -r is limited to a single device");
 875                 goto error;
 876         }
 877         if (shrink_rootdir && !source_dir_set) {
 878                 error("the option --shrink must be used with --rootdir");
 879                 goto error;
 880         }
 881
 882         if (*fs_uuid) {
 883                 uuid_t dummy_uuid;
 884
 885                 if (uuid_parse(fs_uuid, dummy_uuid) != 0) {
 886                         error("could not parse UUID: %s", fs_uuid);
 887                         goto error;
 888                 }
 889                 if (!test_uuid_unique(fs_uuid)) {
 890                         error("non-unique UUID: %s", fs_uuid);
 891                         goto error;
 892                 }
 893         }
 894
 895         while (dev_cnt-- > 0) {
 896                 file = argv[optind++];
 897                 if (source_dir_set && is_path_exist(file) == 0)
 898                         ret = 0;
 899                 else if (is_block_device(file) == 1)
 900                         ret = test_dev_for_mkfs(file, force_overwrite);
 901                 else
 902                         ret = test_status_for_mkfs(file, force_overwrite);
 903
 904                 if (ret)
 905                         goto error;
 906         }
 907
 908         optind = saved_optind;
 909         dev_cnt = argc - optind;
 910
 911         file = argv[optind++];
 912         ssd = is_ssd(file);
 913
 914         /*
 915         * Set default profiles according to number of added devices.
 916         * For mixed groups defaults are single/single.
 917         */
 918         if (!mixed) {
 919                 if (!metadata_profile_opt) {
 920                         if (dev_cnt == 1 && ssd && verbose)
 921                                 printf("Detected a SSD, turning off metadata "
 922                                 "duplication.  Mkfs with -m dup if you want to "
 923                                 "force metadata duplication.\n");
 924
 925                         metadata_profile = (dev_cnt > 1) ?
 926                                         BTRFS_BLOCK_GROUP_RAID1 : (ssd) ?
 927                                         0: BTRFS_BLOCK_GROUP_DUP;
 928                 }
 929                 if (!data_profile_opt) {
 930                         data_profile = (dev_cnt > 1) ?
 931                                 BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */
 932                 }
 933         } else {
 934                 u32 best_nodesize = max_t(u32, sysconf(_SC_PAGESIZE), sectorsize);
 935
 936                 if (metadata_profile_opt || data_profile_opt) {
 937                         if (metadata_profile != data_profile) {
 938                                 error(
 939         "with mixed block groups data and metadata profiles must be the same");
 940                                 goto error;
 941                         }
 942                 }
 943
 944                 if (!nodesize_forced)
 945                         nodesize = best_nodesize;
 946         }
 947
 948         /*
 949          * FS features that can be set by other means than -O
 950          * just set the bit here
 951          */
 952         if (mixed)
 953                 features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
 954
 955         if ((data_profile | metadata_profile) &
 956             (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
 957                 features |= BTRFS_FEATURE_INCOMPAT_RAID56;
 958         }
 959
 960         if (btrfs_check_nodesize(nodesize, sectorsize,
 961                                  features))
 962                 goto error;
 963
 964         if (sectorsize < sizeof(struct btrfs_super_block)) {
 965                 error("sectorsize smaller than superblock: %u < %zu",
 966                                 sectorsize, sizeof(struct btrfs_super_block));
 967                 goto error;
 968         }
 969
 970         min_dev_size = btrfs_min_dev_size(nodesize, mixed, metadata_profile,
 971                                           data_profile);
 972         /*
 973          * Enlarge the destination file or create a new one, using the size
 974          * calculated from source dir.
 975          *
 976          * This must be done before minimal device size checks.
 977          */
 978         if (source_dir_set) {
 979                 int oflags = O_RDWR;
 980                 struct stat statbuf;
 981
 982                 if (is_path_exist(file) == 0)
 983                         oflags |= O_CREAT;
 984
 985                 fd = open(file, oflags, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP |
 986                                          S_IROTH);
 987                 if (fd < 0) {
 988                         error("unable to open %s: %s", file, strerror(errno));
 989                         goto error;
 990                 }
 991                 ret = fstat(fd, &statbuf);
 992                 if (ret < 0) {
 993                         error("unable to stat %s: %s", file, strerror(errno));
 994                         ret = -errno;
 995                         goto error;
 996                 }
 997
 998                 /*
 999                  * Block_count not specified, use file/device size first.
1000                  * Or we will always use source_dir_size calculated for mkfs.
1001                  */
1002                 if (!block_count)
1003                         block_count = btrfs_device_size(fd, &statbuf);
1004                 source_dir_size = btrfs_mkfs_size_dir(source_dir, sectorsize,
1005                                 min_dev_size, metadata_profile, data_profile);
1006                 if (block_count < source_dir_size)
1007                         block_count = source_dir_size;
1008                 ret = zero_output_file(fd, block_count);
1009                 if (ret) {
1010                         error("unable to zero the output file");
1011                         close(fd);
1012                         goto error;
1013                 }
1014                 /* our "device" is the new image file */
1015                 dev_block_count = block_count;
1016                 close(fd);
1017         }
1018         /* Check device/block_count after the nodesize is determined */
1019         if (block_count && block_count < min_dev_size) {
1020                 error("size %llu is too small to make a usable filesystem",
1021                         block_count);
1022                 error("minimum size for btrfs filesystem is %llu",
1023                         min_dev_size);
1024                 goto error;
1025         }
1026         for (i = saved_optind; i < saved_optind + dev_cnt; i++) {
1027                 char *path;
1028
1029                 path = argv[i];
1030                 ret = test_minimum_size(path, min_dev_size);
1031                 if (ret < 0) {
1032                         error("failed to check size for %s: %s",
1033                                 path, strerror(-ret));
1034                         goto error;
1035                 }
1036                 if (ret > 0) {
1037                         error("'%s' is too small to make a usable filesystem",
1038                                 path);
1039                         error("minimum size for each btrfs device is %llu",
1040                                 min_dev_size);
1041                         goto error;
1042                 }
1043         }
1044         ret = test_num_disk_vs_raid(metadata_profile, data_profile,
1045                         dev_cnt, mixed, ssd);
1046         if (ret)
1047                 goto error;
1048
1049         dev_cnt--;
1050
1051         /*
1052          * Open without O_EXCL so that the problem should not occur by the
1053          * following operation in kernel:
1054          * (btrfs_register_one_device() fails if O_EXCL is on)
1055          */
1056         fd = open(file, O_RDWR);
1057         if (fd < 0) {
1058                 error("unable to open %s: %s", file, strerror(errno));
1059                 goto error;
1060         }
1061         ret = btrfs_prepare_device(fd, file, &dev_block_count, block_count,
1062                         (zero_end ? PREP_DEVICE_ZERO_END : 0) |
1063                         (discard ? PREP_DEVICE_DISCARD : 0) |
1064                         (verbose ? PREP_DEVICE_VERBOSE : 0));
1065         if (ret)
1066                 goto error;
1067         if (block_count && block_count > dev_block_count) {
1068                 error("%s is smaller than requested size, expected %llu, found %llu",
1069                       file, (unsigned long long)block_count,
1070                       (unsigned long long)dev_block_count);
1071                 goto error;
1072         }
1073
1074         /* To create the first block group and chunk 0 in make_btrfs */
1075         if (dev_block_count < BTRFS_MKFS_SYSTEM_GROUP_SIZE) {
1076                 error("device is too small to make filesystem, must be at least %llu",
1077                                 (unsigned long long)BTRFS_MKFS_SYSTEM_GROUP_SIZE);
1078                 goto error;
1079         }
1080
1081         if (group_profile_max_safe_loss(metadata_profile) <
1082                 group_profile_max_safe_loss(data_profile)){
1083                 warning("metadata has lower redundancy than data!\n");
1084         }
1085
1086         mkfs_cfg.label = label;
1087         memcpy(mkfs_cfg.fs_uuid, fs_uuid, sizeof(mkfs_cfg.fs_uuid));
1088         mkfs_cfg.num_bytes = dev_block_count;
1089         mkfs_cfg.nodesize = nodesize;
1090         mkfs_cfg.sectorsize = sectorsize;
1091         mkfs_cfg.stripesize = stripesize;
1092         mkfs_cfg.features = features;
1093
1094         ret = make_btrfs(fd, &mkfs_cfg);
1095         if (ret) {
1096                 error("error during mkfs: %s", strerror(-ret));
1097                 goto error;
1098         }
1099
1100         fs_info = open_ctree_fs_info(file, 0, 0, 0,
1101                         OPEN_CTREE_WRITES | OPEN_CTREE_FS_PARTIAL);
1102         if (!fs_info) {
1103                 error("open ctree failed");
1104                 goto error;
1105         }
1106         close(fd);
1107         fd = -1;
1108         root = fs_info->fs_root;
1109         fs_info->alloc_start = alloc_start;
1110
1111         ret = create_metadata_block_groups(root, mixed, &allocation);
1112         if (ret) {
1113                 error("failed to create default block groups: %d", ret);
1114                 goto error;
1115         }
1116
1117         trans = btrfs_start_transaction(root, 1);
1118         if (IS_ERR(trans)) {
1119                 error("failed to start transaction");
1120                 goto error;
1121         }
1122
1123         ret = create_data_block_groups(trans, root, mixed, &allocation);
1124         if (ret) {
1125                 error("failed to create default data block groups: %d", ret);
1126                 goto error;
1127         }
1128
1129         ret = make_root_dir(trans, root);
1130         if (ret) {
1131                 error("failed to setup the root directory: %d", ret);
1132                 goto error;
1133         }
1134
1135         ret = btrfs_commit_transaction(trans, root);
1136         if (ret) {
1137                 error("unable to commit transaction: %d", ret);
1138                 goto out;
1139         }
1140
1141         trans = btrfs_start_transaction(root, 1);
1142         if (IS_ERR(trans)) {
1143                 error("failed to start transaction");
1144                 goto error;
1145         }
1146
1147         if (dev_cnt == 0)
1148                 goto raid_groups;
1149
1150         while (dev_cnt-- > 0) {
1151                 file = argv[optind++];
1152
1153                 /*
1154                  * open without O_EXCL so that the problem should not
1155                  * occur by the following processing.
1156                  * (btrfs_register_one_device() fails if O_EXCL is on)
1157                  */
1158                 fd = open(file, O_RDWR);
1159                 if (fd < 0) {
1160                         error("unable to open %s: %s", file, strerror(errno));
1161                         goto error;
1162                 }
1163                 ret = btrfs_device_already_in_root(root, fd,
1164                                                    BTRFS_SUPER_INFO_OFFSET);
1165                 if (ret) {
1166                         error("skipping duplicate device %s in the filesystem",
1167                                 file);
1168                         close(fd);
1169                         continue;
1170                 }
1171                 ret = btrfs_prepare_device(fd, file, &dev_block_count,
1172                                 block_count,
1173                                 (verbose ? PREP_DEVICE_VERBOSE : 0) |
1174                                 (zero_end ? PREP_DEVICE_ZERO_END : 0) |
1175                                 (discard ? PREP_DEVICE_DISCARD : 0));
1176                 if (ret) {
1177                         goto error;
1178                 }
1179
1180                 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
1181                                         sectorsize, sectorsize, sectorsize);
1182                 if (ret) {
1183                         error("unable to add %s to filesystem: %d", file, ret);
1184                         goto out;
1185                 }
1186                 if (verbose >= 2) {
1187                         struct btrfs_device *device;
1188
1189                         device = container_of(fs_info->fs_devices->devices.next,
1190                                         struct btrfs_device, dev_list);
1191                         printf("adding device %s id %llu\n", file,
1192                                 (unsigned long long)device->devid);
1193                 }
1194         }
1195
1196 raid_groups:
1197         ret = create_raid_groups(trans, root, data_profile,
1198                          metadata_profile, mixed, &allocation);
1199         if (ret) {
1200                 error("unable to create raid groups: %d", ret);
1201                 goto out;
1202         }
1203
1204         ret = create_tree(trans, root, BTRFS_DATA_RELOC_TREE_OBJECTID);
1205         if (ret) {
1206                 error("unable to create data reloc tree: %d", ret);
1207                 goto out;
1208         }
1209
1210         ret = btrfs_commit_transaction(trans, root);
1211         if (ret) {
1212                 error("unable to commit transaction: %d", ret);
1213                 goto out;
1214         }
1215
1216         ret = cleanup_temp_chunks(fs_info, &allocation, data_profile,
1217                                   metadata_profile, metadata_profile);
1218         if (ret < 0) {
1219                 error("failed to cleanup temporary chunks: %d", ret);
1220                 goto out;
1221         }
1222
1223         if (source_dir_set) {
1224                 ret = btrfs_mkfs_fill_dir(source_dir, root, verbose);
1225                 if (ret) {
1226                         error("error wihle filling filesystem: %d", ret);
1227                         goto out;
1228                 }
1229                 if (shrink_rootdir) {
1230                         ret = btrfs_mkfs_shrink_fs(fs_info, &shrink_size,
1231                                                    shrink_rootdir);
1232                         if (ret < 0) {
1233                                 error("error while shrinking filesystem: %d",
1234                                         ret);
1235                                 goto out;
1236                         }
1237                 }
1238         }
1239
1240         if (verbose) {
1241                 char features_buf[64];
1242
1243                 update_chunk_allocation(fs_info, &allocation);
1244                 printf("Label:              %s\n", label);
1245                 printf("UUID:               %s\n", mkfs_cfg.fs_uuid);
1246                 printf("Node size:          %u\n", nodesize);
1247                 printf("Sector size:        %u\n", sectorsize);
1248                 printf("Filesystem size:    %s\n",
1249                         pretty_size(btrfs_super_total_bytes(fs_info->super_copy)));
1250                 printf("Block group profiles:\n");
1251                 if (allocation.data)
1252                         printf("  Data:             %-8s %16s\n",
1253                                 btrfs_group_profile_str(data_profile),
1254                                 pretty_size(allocation.data));
1255                 if (allocation.metadata)
1256                         printf("  Metadata:         %-8s %16s\n",
1257                                 btrfs_group_profile_str(metadata_profile),
1258                                 pretty_size(allocation.metadata));
1259                 if (allocation.mixed)
1260                         printf("  Data+Metadata:    %-8s %16s\n",
1261                                 btrfs_group_profile_str(data_profile),
1262                                 pretty_size(allocation.mixed));
1263                 printf("  System:           %-8s %16s\n",
1264                         btrfs_group_profile_str(metadata_profile),
1265                         pretty_size(allocation.system));
1266                 printf("SSD detected:       %s\n", ssd ? "yes" : "no");
1267                 btrfs_parse_features_to_string(features_buf, features);
1268                 printf("Incompat features:  %s", features_buf);
1269                 printf("\n");
1270
1271                 list_all_devices(root);
1272         }
1273
1274         /*
1275          * The filesystem is now fully set up, commit the remaining changes and
1276          * fix the signature as the last step before closing the devices.
1277          */
1278         fs_info->finalize_on_close = 1;
1279 out:
1280         close_ret = close_ctree(root);
1281
1282         if (!close_ret) {
1283                 optind = saved_optind;
1284                 dev_cnt = argc - optind;
1285                 while (dev_cnt-- > 0) {
1286                         file = argv[optind++];
1287                         if (is_block_device(file) == 1)
1288                                 btrfs_register_one_device(file);
1289                 }
1290         }
1291
1292         btrfs_close_all_devices();
1293         free(label);
1294
1295         return !!ret;
1296 error:
1297         if (fd > 0)
1298                 close(fd);
1299
1300         free(label);
1301         exit(1);
1302 success:
1303         exit(0);
1304 }