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 <limits.h>
  30 #include <unistd.h>
  31 #include <getopt.h>
  32 #include <uuid/uuid.h>
  33 #include <ctype.h>
  34 #include <blkid/blkid.h>
  35 #include "ctree.h"
  36 #include "disk-io.h"
  37 #include "volumes.h"
  38 #include "transaction.h"
  39 #include "utils.h"
  40 #include "list_sort.h"
  41 #include "help.h"
  42 #include "mkfs/common.h"
  43 #include "mkfs/rootdir.h"
  44 #include "fsfeatures.h"
  45
  46 static int verbose = 1;
  47
  48 struct mkfs_allocation {
  49         u64 data;
  50         u64 metadata;
  51         u64 mixed;
  52         u64 system;
  53 };
  54
  55 static int create_metadata_block_groups(struct btrfs_root *root, int mixed,
  56                                 struct mkfs_allocation *allocation)
  57 {
  58         struct btrfs_fs_info *fs_info = root->fs_info;
  59         struct btrfs_trans_handle *trans;
  60         u64 bytes_used;
  61         u64 chunk_start = 0;
  62         u64 chunk_size = 0;
  63         int ret;
  64
  65         trans = btrfs_start_transaction(root, 1);
  66         BUG_ON(IS_ERR(trans));
  67         bytes_used = btrfs_super_bytes_used(fs_info->super_copy);
  68
  69         root->fs_info->system_allocs = 1;
  70         /*
  71          * First temporary system chunk must match the chunk layout
  72          * created in make_btrfs().
  73          */
  74         ret = btrfs_make_block_group(trans, fs_info, bytes_used,
  75                                      BTRFS_BLOCK_GROUP_SYSTEM,
  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                                              chunk_start, chunk_size);
  97                 if (ret)
  98                         return ret;
  99                 allocation->mixed += chunk_size;
 100         } else {
 101                 ret = btrfs_alloc_chunk(trans, fs_info,
 102                                         &chunk_start, &chunk_size,
 103                                         BTRFS_BLOCK_GROUP_METADATA);
 104                 if (ret == -ENOSPC) {
 105                         error("no space to allocate metadata chunk");
 106                         goto err;
 107                 }
 108                 if (ret)
 109                         return ret;
 110                 ret = btrfs_make_block_group(trans, fs_info, 0,
 111                                              BTRFS_BLOCK_GROUP_METADATA,
 112                                              chunk_start, chunk_size);
 113                 allocation->metadata += chunk_size;
 114                 if (ret)
 115                         return ret;
 116         }
 117
 118         root->fs_info->system_allocs = 0;
 119         ret = btrfs_commit_transaction(trans, root);
 120
 121 err:
 122         return ret;
 123 }
 124
 125 static int create_data_block_groups(struct btrfs_trans_handle *trans,
 126                 struct btrfs_root *root, int mixed,
 127                 struct mkfs_allocation *allocation)
 128 {
 129         struct btrfs_fs_info *fs_info = root->fs_info;
 130         u64 chunk_start = 0;
 131         u64 chunk_size = 0;
 132         int ret = 0;
 133
 134         if (!mixed) {
 135                 ret = btrfs_alloc_chunk(trans, fs_info,
 136                                         &chunk_start, &chunk_size,
 137                                         BTRFS_BLOCK_GROUP_DATA);
 138                 if (ret == -ENOSPC) {
 139                         error("no space to allocate data chunk");
 140                         goto err;
 141                 }
 142                 if (ret)
 143                         return ret;
 144                 ret = btrfs_make_block_group(trans, fs_info, 0,
 145                                              BTRFS_BLOCK_GROUP_DATA,
 146                                              chunk_start, chunk_size);
 147                 allocation->data += chunk_size;
 148                 if (ret)
 149                         return ret;
 150         }
 151
 152 err:
 153         return ret;
 154 }
 155
 156 static int make_root_dir(struct btrfs_trans_handle *trans,
 157                 struct btrfs_root *root)
 158 {
 159         struct btrfs_key location;
 160         int ret;
 161
 162         ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
 163                               BTRFS_ROOT_TREE_DIR_OBJECTID);
 164         if (ret)
 165                 goto err;
 166         ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
 167         if (ret)
 168                 goto err;
 169         memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
 170         location.offset = (u64)-1;
 171         ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
 172                         "default", 7,
 173                         btrfs_super_root_dir(root->fs_info->super_copy),
 174                         &location, BTRFS_FT_DIR, 0);
 175         if (ret)
 176                 goto err;
 177
 178         ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
 179                              "default", 7, location.objectid,
 180                              BTRFS_ROOT_TREE_DIR_OBJECTID, 0);
 181         if (ret)
 182                 goto err;
 183
 184 err:
 185         return ret;
 186 }
 187
 188 static int __recow_root(struct btrfs_trans_handle *trans,
 189                          struct btrfs_root *root)
 190 {
 191         struct extent_buffer *tmp;
 192         int ret;
 193
 194         if (trans->transid != btrfs_root_generation(&root->root_item)) {
 195                 extent_buffer_get(root->node);
 196                 ret = __btrfs_cow_block(trans, root, root->node,
 197                                         NULL, 0, &tmp, 0, 0);
 198                 if (ret)
 199                         return ret;
 200                 free_extent_buffer(tmp);
 201         }
 202
 203         return 0;
 204 }
 205
 206 static int recow_roots(struct btrfs_trans_handle *trans,
 207                        struct btrfs_root *root)
 208 {
 209         struct btrfs_fs_info *info = root->fs_info;
 210         int ret;
 211
 212         ret = __recow_root(trans, info->fs_root);
 213         if (ret)
 214                 return ret;
 215         ret = __recow_root(trans, info->tree_root);
 216         if (ret)
 217                 return ret;
 218         ret = __recow_root(trans, info->extent_root);
 219         if (ret)
 220                 return ret;
 221         ret = __recow_root(trans, info->chunk_root);
 222         if (ret)
 223                 return ret;
 224         ret = __recow_root(trans, info->dev_root);
 225         if (ret)
 226                 return ret;
 227         ret = __recow_root(trans, info->csum_root);
 228         if (ret)
 229                 return ret;
 230
 231         return 0;
 232 }
 233
 234 static int create_one_raid_group(struct btrfs_trans_handle *trans,
 235                               struct btrfs_root *root, u64 type,
 236                               struct mkfs_allocation *allocation)
 237
 238 {
 239         struct btrfs_fs_info *fs_info = root->fs_info;
 240         u64 chunk_start;
 241         u64 chunk_size;
 242         int ret;
 243
 244         ret = btrfs_alloc_chunk(trans, fs_info,
 245                                 &chunk_start, &chunk_size, type);
 246         if (ret == -ENOSPC) {
 247                 error("not enough free space to allocate chunk");
 248                 exit(1);
 249         }
 250         if (ret)
 251                 return ret;
 252
 253         ret = btrfs_make_block_group(trans, fs_info, 0,
 254                                      type, chunk_start, chunk_size);
 255
 256         type &= BTRFS_BLOCK_GROUP_TYPE_MASK;
 257         if (type == BTRFS_BLOCK_GROUP_DATA) {
 258                 allocation->data += chunk_size;
 259         } else if (type == BTRFS_BLOCK_GROUP_METADATA) {
 260                 allocation->metadata += chunk_size;
 261         } else if (type == BTRFS_BLOCK_GROUP_SYSTEM) {
 262                 allocation->system += chunk_size;
 263         } else if (type ==
 264                         (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA)) {
 265                 allocation->mixed += chunk_size;
 266         } else {
 267                 error("unrecognized profile type: 0x%llx",
 268                                 (unsigned long long)type);
 269                 ret = -EINVAL;
 270         }
 271
 272         return ret;
 273 }
 274
 275 static int create_raid_groups(struct btrfs_trans_handle *trans,
 276                               struct btrfs_root *root, u64 data_profile,
 277                               u64 metadata_profile, int mixed,
 278                               struct mkfs_allocation *allocation)
 279 {
 280         int ret;
 281
 282         if (metadata_profile) {
 283                 u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA;
 284
 285                 ret = create_one_raid_group(trans, root,
 286                                             BTRFS_BLOCK_GROUP_SYSTEM |
 287                                             metadata_profile, allocation);
 288                 if (ret)
 289                         return ret;
 290
 291                 if (mixed)
 292                         meta_flags |= BTRFS_BLOCK_GROUP_DATA;
 293
 294                 ret = create_one_raid_group(trans, root, meta_flags |
 295                                             metadata_profile, allocation);
 296                 if (ret)
 297                         return ret;
 298
 299         }
 300         if (!mixed && data_profile) {
 301                 ret = create_one_raid_group(trans, root,
 302                                             BTRFS_BLOCK_GROUP_DATA |
 303                                             data_profile, allocation);
 304                 if (ret)
 305                         return ret;
 306         }
 307         ret = recow_roots(trans, root);
 308
 309         return ret;
 310 }
 311
 312 static int create_tree(struct btrfs_trans_handle *trans,
 313                         struct btrfs_root *root, u64 objectid)
 314 {
 315         struct btrfs_key location;
 316         struct btrfs_root_item root_item;
 317         struct extent_buffer *tmp;
 318         u8 uuid[BTRFS_UUID_SIZE] = {0};
 319         int ret;
 320
 321         ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
 322         if (ret)
 323                 return ret;
 324
 325         memcpy(&root_item, &root->root_item, sizeof(root_item));
 326         btrfs_set_root_bytenr(&root_item, tmp->start);
 327         btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
 328         btrfs_set_root_generation(&root_item, trans->transid);
 329         /* clear uuid and o/ctime of source tree */
 330         memcpy(root_item.uuid, uuid, BTRFS_UUID_SIZE);
 331         btrfs_set_stack_timespec_sec(&root_item.otime, 0);
 332         btrfs_set_stack_timespec_sec(&root_item.ctime, 0);
 333         free_extent_buffer(tmp);
 334
 335         location.objectid = objectid;
 336         location.type = BTRFS_ROOT_ITEM_KEY;
 337         location.offset = 0;
 338         ret = btrfs_insert_root(trans, root->fs_info->tree_root,
 339                                 &location, &root_item);
 340
 341         return ret;
 342 }
 343
 344 static void print_usage(int ret)
 345 {
 346         printf("Usage: mkfs.btrfs [options] dev [ dev ... ]\n");
 347         printf("Options:\n");
 348         printf("  allocation profiles:\n");
 349         printf("\t-d|--data PROFILE       data profile, raid0, raid1, raid5, raid6, raid10, dup or single\n");
 350         printf("\t-m|--metadata PROFILE   metadata profile, values like for data profile\n");
 351         printf("\t-M|--mixed              mix metadata and data together\n");
 352         printf("  features:\n");
 353         printf("\t-n|--nodesize SIZE      size of btree nodes\n");
 354         printf("\t-s|--sectorsize SIZE    data block size (may not be mountable by current kernel)\n");
 355         printf("\t-O|--features LIST      comma separated list of filesystem features (use '-O list-all' to list features)\n");
 356         printf("\t-L|--label LABEL        set the filesystem label\n");
 357         printf("\t-U|--uuid UUID          specify the filesystem UUID (must be unique)\n");
 358         printf("  creation:\n");
 359         printf("\t-b|--byte-count SIZE    set filesystem size to SIZE (on the first device)\n");
 360         printf("\t-r|--rootdir DIR        copy files from DIR to the image root directory\n");
 361         printf("\t--shrink                (with --rootdir) shrink the filled filesystem to minimal size\n");
 362         printf("\t-K|--nodiscard          do not perform whole device TRIM\n");
 363         printf("\t-f|--force              force overwrite of existing filesystem\n");
 364         printf("  general:\n");
 365         printf("\t-q|--quiet              no messages except errors\n");
 366         printf("\t-V|--version            print the mkfs.btrfs version and exit\n");
 367         printf("\t--help                  print this help and exit\n");
 368         printf("  deprecated:\n");
 369         printf("\t-A|--alloc-start START  the offset to start the filesystem\n");
 370         printf("\t-l|--leafsize SIZE      deprecated, alias for nodesize\n");
 371         exit(ret);
 372 }
 373
 374 static u64 parse_profile(const char *s)
 375 {
 376         if (strcasecmp(s, "raid0") == 0) {
 377                 return BTRFS_BLOCK_GROUP_RAID0;
 378         } else if (strcasecmp(s, "raid1") == 0) {
 379                 return BTRFS_BLOCK_GROUP_RAID1;
 380         } else if (strcasecmp(s, "raid5") == 0) {
 381                 return BTRFS_BLOCK_GROUP_RAID5;
 382         } else if (strcasecmp(s, "raid6") == 0) {
 383                 return BTRFS_BLOCK_GROUP_RAID6;
 384         } else if (strcasecmp(s, "raid10") == 0) {
 385                 return BTRFS_BLOCK_GROUP_RAID10;
 386         } else if (strcasecmp(s, "dup") == 0) {
 387                 return BTRFS_BLOCK_GROUP_DUP;
 388         } else if (strcasecmp(s, "single") == 0) {
 389                 return 0;
 390         } else {
 391                 error("unknown profile %s", s);
 392                 exit(1);
 393         }
 394         /* not reached */
 395         return 0;
 396 }
 397
 398 static char *parse_label(const char *input)
 399 {
 400         int len = strlen(input);
 401
 402         if (len >= BTRFS_LABEL_SIZE) {
 403                 error("label %s is too long (max %d)", input,
 404                         BTRFS_LABEL_SIZE - 1);
 405                 exit(1);
 406         }
 407         return strdup(input);
 408 }
 409
 410 static int zero_output_file(int out_fd, u64 size)
 411 {
 412         int loop_num;
 413         u64 location = 0;
 414         char buf[SZ_4K];
 415         int ret = 0, i;
 416         ssize_t written;
 417
 418         memset(buf, 0, SZ_4K);
 419
 420         /* Only zero out the first 1M */
 421         loop_num = SZ_1M / SZ_4K;
 422         for (i = 0; i < loop_num; i++) {
 423                 written = pwrite64(out_fd, buf, SZ_4K, location);
 424                 if (written != SZ_4K)
 425                         ret = -EIO;
 426                 location += SZ_4K;
 427         }
 428
 429         /* Then enlarge the file to size */
 430         written = pwrite64(out_fd, buf, 1, size - 1);
 431         if (written < 1)
 432                 ret = -EIO;
 433         return ret;
 434 }
 435
 436 static int is_ssd(const char *file)
 437 {
 438         blkid_probe probe;
 439         char wholedisk[PATH_MAX];
 440         char sysfs_path[PATH_MAX];
 441         dev_t devno;
 442         int fd;
 443         char rotational;
 444         int ret;
 445
 446         probe = blkid_new_probe_from_filename(file);
 447         if (!probe)
 448                 return 0;
 449
 450         /* Device number of this disk (possibly a partition) */
 451         devno = blkid_probe_get_devno(probe);
 452         if (!devno) {
 453                 blkid_free_probe(probe);
 454                 return 0;
 455         }
 456
 457         /* Get whole disk name (not full path) for this devno */
 458         ret = blkid_devno_to_wholedisk(devno,
 459                         wholedisk, sizeof(wholedisk), NULL);
 460         if (ret) {
 461                 blkid_free_probe(probe);
 462                 return 0;
 463         }
 464
 465         snprintf(sysfs_path, PATH_MAX, "/sys/block/%s/queue/rotational",
 466                  wholedisk);
 467
 468         blkid_free_probe(probe);
 469
 470         fd = open(sysfs_path, O_RDONLY);
 471         if (fd < 0) {
 472                 return 0;
 473         }
 474
 475         if (read(fd, &rotational, 1) < 1) {
 476                 close(fd);
 477                 return 0;
 478         }
 479         close(fd);
 480
 481         return rotational == '0';
 482 }
 483
 484 static int _cmp_device_by_id(void *priv, struct list_head *a,
 485                              struct list_head *b)
 486 {
 487         return list_entry(a, struct btrfs_device, dev_list)->devid -
 488                list_entry(b, struct btrfs_device, dev_list)->devid;
 489 }
 490
 491 static void list_all_devices(struct btrfs_root *root)
 492 {
 493         struct btrfs_fs_devices *fs_devices;
 494         struct btrfs_device *device;
 495         int number_of_devices = 0;
 496         u64 total_block_count = 0;
 497
 498         fs_devices = root->fs_info->fs_devices;
 499
 500         list_for_each_entry(device, &fs_devices->devices, dev_list)
 501                 number_of_devices++;
 502
 503         list_sort(NULL, &fs_devices->devices, _cmp_device_by_id);
 504
 505         printf("Number of devices:  %d\n", number_of_devices);
 506         /* printf("Total devices size: %10s\n", */
 507                 /* pretty_size(total_block_count)); */
 508         printf("Devices:\n");
 509         printf("   ID        SIZE  PATH\n");
 510         list_for_each_entry(device, &fs_devices->devices, dev_list) {
 511                 printf("  %3llu  %10s  %s\n",
 512                         device->devid,
 513                         pretty_size(device->total_bytes),
 514                         device->name);
 515                 total_block_count += device->total_bytes;
 516         }
 517
 518         printf("\n");
 519 }
 520
 521 static int is_temp_block_group(struct extent_buffer *node,
 522                                struct btrfs_block_group_item *bgi,
 523                                u64 data_profile, u64 meta_profile,
 524                                u64 sys_profile)
 525 {
 526         u64 flag = btrfs_disk_block_group_flags(node, bgi);
 527         u64 flag_type = flag & BTRFS_BLOCK_GROUP_TYPE_MASK;
 528         u64 flag_profile = flag & BTRFS_BLOCK_GROUP_PROFILE_MASK;
 529         u64 used = btrfs_disk_block_group_used(node, bgi);
 530
 531         /*
 532          * Chunks meets all the following conditions is a temp chunk
 533          * 1) Empty chunk
 534          * Temp chunk is always empty.
 535          *
 536          * 2) profile mismatch with mkfs profile.
 537          * Temp chunk is always in SINGLE
 538          *
 539          * 3) Size differs with mkfs_alloc
 540          * Special case for SINGLE/SINGLE btrfs.
 541          * In that case, temp data chunk and real data chunk are always empty.
 542          * So we need to use mkfs_alloc to be sure which chunk is the newly
 543          * allocated.
 544          *
 545          * Normally, new chunk size is equal to mkfs one (One chunk)
 546          * If it has multiple chunks, we just refuse to delete any one.
 547          * As they are all single, so no real problem will happen.
 548          * So only use condition 1) and 2) to judge them.
 549          */
 550         if (used != 0)
 551                 return 0;
 552         switch (flag_type) {
 553         case BTRFS_BLOCK_GROUP_DATA:
 554         case BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA:
 555                 data_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
 556                 if (flag_profile != data_profile)
 557                         return 1;
 558                 break;
 559         case BTRFS_BLOCK_GROUP_METADATA:
 560                 meta_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
 561                 if (flag_profile != meta_profile)
 562                         return 1;
 563                 break;
 564         case BTRFS_BLOCK_GROUP_SYSTEM:
 565                 sys_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
 566                 if (flag_profile != sys_profile)
 567                         return 1;
 568                 break;
 569         }
 570         return 0;
 571 }
 572
 573 /* Note: if current is a block group, it will skip it anyway */
 574 static int next_block_group(struct btrfs_root *root,
 575                             struct btrfs_path *path)
 576 {
 577         struct btrfs_key key;
 578         int ret = 0;
 579
 580         while (1) {
 581                 ret = btrfs_next_item(root, path);
 582                 if (ret)
 583                         goto out;
 584
 585                 btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
 586                 if (key.type == BTRFS_BLOCK_GROUP_ITEM_KEY)
 587                         goto out;
 588         }
 589 out:
 590         return ret;
 591 }
 592
 593 /* This function will cleanup  */
 594 static int cleanup_temp_chunks(struct btrfs_fs_info *fs_info,
 595                                struct mkfs_allocation *alloc,
 596                                u64 data_profile, u64 meta_profile,
 597                                u64 sys_profile)
 598 {
 599         struct btrfs_trans_handle *trans = NULL;
 600         struct btrfs_block_group_item *bgi;
 601         struct btrfs_root *root = fs_info->extent_root;
 602         struct btrfs_key key;
 603         struct btrfs_key found_key;
 604         struct btrfs_path path;
 605         int ret = 0;
 606
 607         btrfs_init_path(&path);
 608         trans = btrfs_start_transaction(root, 1);
 609         BUG_ON(IS_ERR(trans));
 610
 611         key.objectid = 0;
 612         key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
 613         key.offset = 0;
 614
 615         while (1) {
 616                 /*
 617                  * as the rest of the loop may modify the tree, we need to
 618                  * start a new search each time.
 619                  */
 620                 ret = btrfs_search_slot(trans, root, &key, &path, 0, 0);
 621                 if (ret < 0)
 622                         goto out;
 623                 /* Don't pollute ret for >0 case */
 624                 if (ret > 0)
 625                         ret = 0;
 626
 627                 btrfs_item_key_to_cpu(path.nodes[0], &found_key,
 628                                       path.slots[0]);
 629                 if (found_key.objectid < key.objectid)
 630                         goto out;
 631                 if (found_key.type != BTRFS_BLOCK_GROUP_ITEM_KEY) {
 632                         ret = next_block_group(root, &path);
 633                         if (ret < 0)
 634                                 goto out;
 635                         if (ret > 0) {
 636                                 ret = 0;
 637                                 goto out;
 638                         }
 639                         btrfs_item_key_to_cpu(path.nodes[0], &found_key,
 640                                               path.slots[0]);
 641                 }
 642
 643                 bgi = btrfs_item_ptr(path.nodes[0], path.slots[0],
 644                                      struct btrfs_block_group_item);
 645                 if (is_temp_block_group(path.nodes[0], bgi,
 646                                         data_profile, meta_profile,
 647                                         sys_profile)) {
 648                         u64 flags = btrfs_disk_block_group_flags(path.nodes[0],
 649                                                              bgi);
 650
 651                         ret = btrfs_free_block_group(trans, fs_info,
 652                                         found_key.objectid, found_key.offset);
 653                         if (ret < 0)
 654                                 goto out;
 655
 656                         if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
 657                             BTRFS_BLOCK_GROUP_DATA)
 658                                 alloc->data -= found_key.offset;
 659                         else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
 660                                  BTRFS_BLOCK_GROUP_METADATA)
 661                                 alloc->metadata -= found_key.offset;
 662                         else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
 663                                  BTRFS_BLOCK_GROUP_SYSTEM)
 664                                 alloc->system -= found_key.offset;
 665                         else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
 666                                  (BTRFS_BLOCK_GROUP_METADATA |
 667                                   BTRFS_BLOCK_GROUP_DATA))
 668                                 alloc->mixed -= found_key.offset;
 669                 }
 670                 btrfs_release_path(&path);
 671                 key.objectid = found_key.objectid + found_key.offset;
 672         }
 673 out:
 674         if (trans)
 675                 btrfs_commit_transaction(trans, root);
 676         btrfs_release_path(&path);
 677         return ret;
 678 }
 679
 680 /*
 681  * Just update chunk allocation info, since --rootdir may allocate new
 682  * chunks which is not updated in @allocation structure.
 683  */
 684 static void update_chunk_allocation(struct btrfs_fs_info *fs_info,
 685                                     struct mkfs_allocation *allocation)
 686 {
 687         struct btrfs_block_group_cache *bg_cache;
 688         const u64 mixed_flag = BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA;
 689         u64 search_start = 0;
 690
 691         allocation->mixed = 0;
 692         allocation->data = 0;
 693         allocation->metadata = 0;
 694         allocation->system = 0;
 695         while (1) {
 696                 bg_cache = btrfs_lookup_first_block_group(fs_info,
 697                                                           search_start);
 698                 if (!bg_cache)
 699                         break;
 700                 if ((bg_cache->flags & mixed_flag) == mixed_flag)
 701                         allocation->mixed += bg_cache->key.offset;
 702                 else if (bg_cache->flags & BTRFS_BLOCK_GROUP_DATA)
 703                         allocation->data += bg_cache->key.offset;
 704                 else if (bg_cache->flags & BTRFS_BLOCK_GROUP_METADATA)
 705                         allocation->metadata += bg_cache->key.offset;
 706                 else
 707                         allocation->system += bg_cache->key.offset;
 708                 search_start = bg_cache->key.objectid + bg_cache->key.offset;
 709         }
 710 }
 711
 712 int main(int argc, char **argv)
 713 {
 714         char *file;
 715         struct btrfs_root *root;
 716         struct btrfs_fs_info *fs_info;
 717         struct btrfs_trans_handle *trans;
 718         char *label = NULL;
 719         u64 block_count = 0;
 720         u64 dev_block_count = 0;
 721         u64 alloc_start = 0;
 722         u64 metadata_profile = 0;
 723         u64 data_profile = 0;
 724         u32 nodesize = max_t(u32, sysconf(_SC_PAGESIZE),
 725                         BTRFS_MKFS_DEFAULT_NODE_SIZE);
 726         u32 sectorsize = 4096;
 727         u32 stripesize = 4096;
 728         int zero_end = 1;
 729         int fd = -1;
 730         int ret = 0;
 731         int close_ret;
 732         int i;
 733         int mixed = 0;
 734         int nodesize_forced = 0;
 735         int data_profile_opt = 0;
 736         int metadata_profile_opt = 0;
 737         int discard = 1;
 738         int ssd = 0;
 739         int force_overwrite = 0;
 740         char *source_dir = NULL;
 741         bool source_dir_set = false;
 742         bool shrink_rootdir = false;
 743         u64 source_dir_size = 0;
 744         u64 min_dev_size;
 745         u64 shrink_size;
 746         int dev_cnt = 0;
 747         int saved_optind;
 748         char fs_uuid[BTRFS_UUID_UNPARSED_SIZE] = { 0 };
 749         u64 features = BTRFS_MKFS_DEFAULT_FEATURES;
 750         struct mkfs_allocation allocation = { 0 };
 751         struct btrfs_mkfs_config mkfs_cfg;
 752
 753         while(1) {
 754                 int c;
 755                 enum { GETOPT_VAL_SHRINK = 257 };
 756                 static const struct option long_options[] = {
 757                         { "alloc-start", required_argument, NULL, 'A'},
 758                         { "byte-count", required_argument, NULL, 'b' },
 759                         { "force", no_argument, NULL, 'f' },
 760                         { "leafsize", required_argument, NULL, 'l' },
 761                         { "label", required_argument, NULL, 'L'},
 762                         { "metadata", required_argument, NULL, 'm' },
 763                         { "mixed", no_argument, NULL, 'M' },
 764                         { "nodesize", required_argument, NULL, 'n' },
 765                         { "sectorsize", required_argument, NULL, 's' },
 766                         { "data", required_argument, NULL, 'd' },
 767                         { "version", no_argument, NULL, 'V' },
 768                         { "rootdir", required_argument, NULL, 'r' },
 769                         { "nodiscard", no_argument, NULL, 'K' },
 770                         { "features", required_argument, NULL, 'O' },
 771                         { "uuid", required_argument, NULL, 'U' },
 772                         { "quiet", 0, NULL, 'q' },
 773                         { "shrink", no_argument, NULL, GETOPT_VAL_SHRINK },
 774                         { "help", no_argument, NULL, GETOPT_VAL_HELP },
 775                         { NULL, 0, NULL, 0}
 776                 };
 777
 778                 c = getopt_long(argc, argv, "A:b:fl:n:s:m:d:L:O:r:U:VMKq",
 779                                 long_options, NULL);
 780                 if (c < 0)
 781                         break;
 782                 switch(c) {
 783                         case 'A':
 784                                 alloc_start = parse_size(optarg);
 785                                 break;
 786                         case 'f':
 787                                 force_overwrite = 1;
 788                                 break;
 789                         case 'd':
 790                                 data_profile = parse_profile(optarg);
 791                                 data_profile_opt = 1;
 792                                 break;
 793                         case 'l':
 794                                 warning("--leafsize is deprecated, use --nodesize");
 795                                 /* fall through */
 796                         case 'n':
 797                                 nodesize = parse_size(optarg);
 798                                 nodesize_forced = 1;
 799                                 break;
 800                         case 'L':
 801                                 label = parse_label(optarg);
 802                                 break;
 803                         case 'm':
 804                                 metadata_profile = parse_profile(optarg);
 805                                 metadata_profile_opt = 1;
 806                                 break;
 807                         case 'M':
 808                                 mixed = 1;
 809                                 break;
 810                         case 'O': {
 811                                 char *orig = strdup(optarg);
 812                                 char *tmp = orig;
 813
 814                                 tmp = btrfs_parse_fs_features(tmp, &features);
 815                                 if (tmp) {
 816                                         error("unrecognized filesystem feature '%s'",
 817                                                         tmp);
 818                                         free(orig);
 819                                         goto error;
 820                                 }
 821                                 free(orig);
 822                                 if (features & BTRFS_FEATURE_LIST_ALL) {
 823                                         btrfs_list_all_fs_features(0);
 824                                         goto success;
 825                                 }
 826                                 break;
 827                                 }
 828                         case 's':
 829                                 sectorsize = parse_size(optarg);
 830                                 break;
 831                         case 'b':
 832                                 block_count = parse_size(optarg);
 833                                 zero_end = 0;
 834                                 break;
 835                         case 'V':
 836                                 printf("mkfs.btrfs, part of %s\n",
 837                                                 PACKAGE_STRING);
 838                                 goto success;
 839                         case 'r':
 840                                 source_dir = optarg;
 841                                 source_dir_set = true;
 842                                 break;
 843                         case 'U':
 844                                 strncpy(fs_uuid, optarg,
 845                                         BTRFS_UUID_UNPARSED_SIZE - 1);
 846                                 break;
 847                         case 'K':
 848                                 discard = 0;
 849                                 break;
 850                         case 'q':
 851                                 verbose = 0;
 852                                 break;
 853                         case GETOPT_VAL_SHRINK:
 854                                 shrink_rootdir = true;
 855                                 break;
 856                         case GETOPT_VAL_HELP:
 857                         default:
 858                                 print_usage(c != GETOPT_VAL_HELP);
 859                 }
 860         }
 861
 862         if (verbose) {
 863                 printf("%s\n", PACKAGE_STRING);
 864                 printf("See %s for more information.\n\n", PACKAGE_URL);
 865         }
 866
 867         sectorsize = max(sectorsize, (u32)sysconf(_SC_PAGESIZE));
 868         stripesize = sectorsize;
 869         saved_optind = optind;
 870         dev_cnt = argc - optind;
 871         if (dev_cnt == 0)
 872                 print_usage(1);
 873
 874         if (source_dir_set && dev_cnt > 1) {
 875                 error("the option -r is limited to a single device");
 876                 goto error;
 877         }
 878         if (shrink_rootdir && !source_dir_set) {
 879                 error("the option --shrink must be used with --rootdir");
 880                 goto error;
 881         }
 882
 883         if (*fs_uuid) {
 884                 uuid_t dummy_uuid;
 885
 886                 if (uuid_parse(fs_uuid, dummy_uuid) != 0) {
 887                         error("could not parse UUID: %s", fs_uuid);
 888                         goto error;
 889                 }
 890                 if (!test_uuid_unique(fs_uuid)) {
 891                         error("non-unique UUID: %s", fs_uuid);
 892                         goto error;
 893                 }
 894         }
 895
 896         while (dev_cnt-- > 0) {
 897                 file = argv[optind++];
 898                 if (source_dir_set && is_path_exist(file) == 0)
 899                         ret = 0;
 900                 else if (is_block_device(file) == 1)
 901                         ret = test_dev_for_mkfs(file, force_overwrite);
 902                 else
 903                         ret = test_status_for_mkfs(file, force_overwrite);
 904
 905                 if (ret)
 906                         goto error;
 907         }
 908
 909         optind = saved_optind;
 910         dev_cnt = argc - optind;
 911
 912         file = argv[optind++];
 913         ssd = is_ssd(file);
 914
 915         /*
 916         * Set default profiles according to number of added devices.
 917         * For mixed groups defaults are single/single.
 918         */
 919         if (!mixed) {
 920                 if (!metadata_profile_opt) {
 921                         if (dev_cnt == 1 && ssd && verbose)
 922                                 printf("Detected a SSD, turning off metadata "
 923                                 "duplication.  Mkfs with -m dup if you want to "
 924                                 "force metadata duplication.\n");
 925
 926                         metadata_profile = (dev_cnt > 1) ?
 927                                         BTRFS_BLOCK_GROUP_RAID1 : (ssd) ?
 928                                         0: BTRFS_BLOCK_GROUP_DUP;
 929                 }
 930                 if (!data_profile_opt) {
 931                         data_profile = (dev_cnt > 1) ?
 932                                 BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */
 933                 }
 934         } else {
 935                 u32 best_nodesize = max_t(u32, sysconf(_SC_PAGESIZE), sectorsize);
 936
 937                 if (metadata_profile_opt || data_profile_opt) {
 938                         if (metadata_profile != data_profile) {
 939                                 error(
 940         "with mixed block groups data and metadata profiles must be the same");
 941                                 goto error;
 942                         }
 943                 }
 944
 945                 if (!nodesize_forced)
 946                         nodesize = best_nodesize;
 947         }
 948
 949         /*
 950          * FS features that can be set by other means than -O
 951          * just set the bit here
 952          */
 953         if (mixed)
 954                 features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
 955
 956         if ((data_profile | metadata_profile) &
 957             (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
 958                 features |= BTRFS_FEATURE_INCOMPAT_RAID56;
 959         }
 960
 961         if (btrfs_check_nodesize(nodesize, sectorsize,
 962                                  features))
 963                 goto error;
 964
 965         if (sectorsize < sizeof(struct btrfs_super_block)) {
 966                 error("sectorsize smaller than superblock: %u < %zu",
 967                                 sectorsize, sizeof(struct btrfs_super_block));
 968                 goto error;
 969         }
 970
 971         min_dev_size = btrfs_min_dev_size(nodesize, mixed, metadata_profile,
 972                                           data_profile);
 973         /*
 974          * Enlarge the destination file or create a new one, using the size
 975          * calculated from source dir.
 976          *
 977          * This must be done before minimal device size checks.
 978          */
 979         if (source_dir_set) {
 980                 int oflags = O_RDWR;
 981                 struct stat statbuf;
 982
 983                 if (is_path_exist(file) == 0)
 984                         oflags |= O_CREAT;
 985
 986                 fd = open(file, oflags, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP |
 987                                          S_IROTH);
 988                 if (fd < 0) {
 989                         error("unable to open %s: %m", file);
 990                         goto error;
 991                 }
 992
 993                 ret = fstat(fd, &statbuf);
 994                 if (ret < 0) {
 995                         error("unable to stat %s: %m", file);
 996                         ret = -errno;
 997                         goto error;
 998                 }
 999
1000                 /*
1001                  * Block_count not specified, use file/device size first.
1002                  * Or we will always use source_dir_size calculated for mkfs.
1003                  */
1004                 if (!block_count)
1005                         block_count = btrfs_device_size(fd, &statbuf);
1006                 source_dir_size = btrfs_mkfs_size_dir(source_dir, sectorsize,
1007                                 min_dev_size, metadata_profile, data_profile);
1008                 if (block_count < source_dir_size)
1009                         block_count = source_dir_size;
1010                 ret = zero_output_file(fd, block_count);
1011                 if (ret) {
1012                         error("unable to zero the output file");
1013                         close(fd);
1014                         goto error;
1015                 }
1016                 /* our "device" is the new image file */
1017                 dev_block_count = block_count;
1018                 close(fd);
1019         }
1020         /* Check device/block_count after the nodesize is determined */
1021         if (block_count && block_count < min_dev_size) {
1022                 error("size %llu is too small to make a usable filesystem",
1023                         block_count);
1024                 error("minimum size for btrfs filesystem is %llu",
1025                         min_dev_size);
1026                 goto error;
1027         }
1028         for (i = saved_optind; i < saved_optind + dev_cnt; i++) {
1029                 char *path;
1030
1031                 path = argv[i];
1032                 ret = test_minimum_size(path, min_dev_size);
1033                 if (ret < 0) {
1034                         error("failed to check size for %s: %m", path);
1035                         goto error;
1036                 }
1037                 if (ret > 0) {
1038                         error("'%s' is too small to make a usable filesystem",
1039                                 path);
1040                         error("minimum size for each btrfs device is %llu",
1041                                 min_dev_size);
1042                         goto error;
1043                 }
1044         }
1045         ret = test_num_disk_vs_raid(metadata_profile, data_profile,
1046                         dev_cnt, mixed, ssd);
1047         if (ret)
1048                 goto error;
1049
1050         dev_cnt--;
1051
1052         /*
1053          * Open without O_EXCL so that the problem should not occur by the
1054          * following operation in kernel:
1055          * (btrfs_register_one_device() fails if O_EXCL is on)
1056          */
1057         fd = open(file, O_RDWR);
1058         if (fd < 0) {
1059                 error("unable to open %s: %m", file);
1060                 goto error;
1061         }
1062         ret = btrfs_prepare_device(fd, file, &dev_block_count, block_count,
1063                         (zero_end ? PREP_DEVICE_ZERO_END : 0) |
1064                         (discard ? PREP_DEVICE_DISCARD : 0) |
1065                         (verbose ? PREP_DEVICE_VERBOSE : 0));
1066         if (ret)
1067                 goto error;
1068         if (block_count && block_count > dev_block_count) {
1069                 error("%s is smaller than requested size, expected %llu, found %llu",
1070                       file, (unsigned long long)block_count,
1071                       (unsigned long long)dev_block_count);
1072                 goto error;
1073         }
1074
1075         /* To create the first block group and chunk 0 in make_btrfs */
1076         if (dev_block_count < BTRFS_MKFS_SYSTEM_GROUP_SIZE) {
1077                 error("device is too small to make filesystem, must be at least %llu",
1078                                 (unsigned long long)BTRFS_MKFS_SYSTEM_GROUP_SIZE);
1079                 goto error;
1080         }
1081
1082         if (group_profile_max_safe_loss(metadata_profile) <
1083                 group_profile_max_safe_loss(data_profile)){
1084                 warning("metadata has lower redundancy than data!\n");
1085         }
1086
1087         mkfs_cfg.label = label;
1088         memcpy(mkfs_cfg.fs_uuid, fs_uuid, sizeof(mkfs_cfg.fs_uuid));
1089         mkfs_cfg.num_bytes = dev_block_count;
1090         mkfs_cfg.nodesize = nodesize;
1091         mkfs_cfg.sectorsize = sectorsize;
1092         mkfs_cfg.stripesize = stripesize;
1093         mkfs_cfg.features = features;
1094
1095         ret = make_btrfs(fd, &mkfs_cfg);
1096         if (ret) {
1097                 error("error during mkfs: %s", strerror(-ret));
1098                 goto error;
1099         }
1100
1101         fs_info = open_ctree_fs_info(file, 0, 0, 0,
1102                         OPEN_CTREE_WRITES | OPEN_CTREE_TEMPORARY_SUPER);
1103         if (!fs_info) {
1104                 error("open ctree failed");
1105                 goto error;
1106         }
1107         close(fd);
1108         fd = -1;
1109         root = fs_info->fs_root;
1110         fs_info->alloc_start = alloc_start;
1111
1112         ret = create_metadata_block_groups(root, mixed, &allocation);
1113         if (ret) {
1114                 error("failed to create default block groups: %d", ret);
1115                 goto error;
1116         }
1117
1118         trans = btrfs_start_transaction(root, 1);
1119         if (IS_ERR(trans)) {
1120                 error("failed to start transaction");
1121                 goto error;
1122         }
1123
1124         ret = create_data_block_groups(trans, root, mixed, &allocation);
1125         if (ret) {
1126                 error("failed to create default data block groups: %d", ret);
1127                 goto error;
1128         }
1129
1130         ret = make_root_dir(trans, root);
1131         if (ret) {
1132                 error("failed to setup the root directory: %d", ret);
1133                 goto error;
1134         }
1135
1136         ret = btrfs_commit_transaction(trans, root);
1137         if (ret) {
1138                 error("unable to commit transaction: %d", ret);
1139                 goto out;
1140         }
1141
1142         trans = btrfs_start_transaction(root, 1);
1143         if (IS_ERR(trans)) {
1144                 error("failed to start transaction");
1145                 goto error;
1146         }
1147
1148         if (dev_cnt == 0)
1149                 goto raid_groups;
1150
1151         while (dev_cnt-- > 0) {
1152                 file = argv[optind++];
1153
1154                 /*
1155                  * open without O_EXCL so that the problem should not
1156                  * occur by the following processing.
1157                  * (btrfs_register_one_device() fails if O_EXCL is on)
1158                  */
1159                 fd = open(file, O_RDWR);
1160                 if (fd < 0) {
1161                         error("unable to open %s: %m", file);
1162                         goto error;
1163                 }
1164                 ret = btrfs_device_already_in_root(root, fd,
1165                                                    BTRFS_SUPER_INFO_OFFSET);
1166                 if (ret) {
1167                         error("skipping duplicate device %s in the filesystem",
1168                                 file);
1169                         close(fd);
1170                         continue;
1171                 }
1172                 ret = btrfs_prepare_device(fd, file, &dev_block_count,
1173                                 block_count,
1174                                 (verbose ? PREP_DEVICE_VERBOSE : 0) |
1175                                 (zero_end ? PREP_DEVICE_ZERO_END : 0) |
1176                                 (discard ? PREP_DEVICE_DISCARD : 0));
1177                 if (ret) {
1178                         goto error;
1179                 }
1180
1181                 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
1182                                         sectorsize, sectorsize, sectorsize);
1183                 if (ret) {
1184                         error("unable to add %s to filesystem: %d", file, ret);
1185                         goto out;
1186                 }
1187                 if (verbose >= 2) {
1188                         struct btrfs_device *device;
1189
1190                         device = container_of(fs_info->fs_devices->devices.next,
1191                                         struct btrfs_device, dev_list);
1192                         printf("adding device %s id %llu\n", file,
1193                                 (unsigned long long)device->devid);
1194                 }
1195         }
1196
1197 raid_groups:
1198         ret = create_raid_groups(trans, root, data_profile,
1199                          metadata_profile, mixed, &allocation);
1200         if (ret) {
1201                 error("unable to create raid groups: %d", ret);
1202                 goto out;
1203         }
1204
1205         ret = create_tree(trans, root, BTRFS_DATA_RELOC_TREE_OBJECTID);
1206         if (ret) {
1207                 error("unable to create data reloc tree: %d", ret);
1208                 goto out;
1209         }
1210
1211         ret = create_tree(trans, root, BTRFS_UUID_TREE_OBJECTID);
1212         if (ret)
1213                 warning(
1214         "unable to create uuid tree, will be created after mount: %d", ret);
1215
1216         ret = btrfs_commit_transaction(trans, root);
1217         if (ret) {
1218                 error("unable to commit transaction: %d", ret);
1219                 goto out;
1220         }
1221
1222         ret = cleanup_temp_chunks(fs_info, &allocation, data_profile,
1223                                   metadata_profile, metadata_profile);
1224         if (ret < 0) {
1225                 error("failed to cleanup temporary chunks: %d", ret);
1226                 goto out;
1227         }
1228
1229         if (source_dir_set) {
1230                 ret = btrfs_mkfs_fill_dir(source_dir, root, verbose);
1231                 if (ret) {
1232                         error("error wihle filling filesystem: %d", ret);
1233                         goto out;
1234                 }
1235                 if (shrink_rootdir) {
1236                         ret = btrfs_mkfs_shrink_fs(fs_info, &shrink_size,
1237                                                    shrink_rootdir);
1238                         if (ret < 0) {
1239                                 error("error while shrinking filesystem: %d",
1240                                         ret);
1241                                 goto out;
1242                         }
1243                 }
1244         }
1245
1246         if (verbose) {
1247                 char features_buf[64];
1248
1249                 update_chunk_allocation(fs_info, &allocation);
1250                 printf("Label:              %s\n", label);
1251                 printf("UUID:               %s\n", mkfs_cfg.fs_uuid);
1252                 printf("Node size:          %u\n", nodesize);
1253                 printf("Sector size:        %u\n", sectorsize);
1254                 printf("Filesystem size:    %s\n",
1255                         pretty_size(btrfs_super_total_bytes(fs_info->super_copy)));
1256                 printf("Block group profiles:\n");
1257                 if (allocation.data)
1258                         printf("  Data:             %-8s %16s\n",
1259                                 btrfs_group_profile_str(data_profile),
1260                                 pretty_size(allocation.data));
1261                 if (allocation.metadata)
1262                         printf("  Metadata:         %-8s %16s\n",
1263                                 btrfs_group_profile_str(metadata_profile),
1264                                 pretty_size(allocation.metadata));
1265                 if (allocation.mixed)
1266                         printf("  Data+Metadata:    %-8s %16s\n",
1267                                 btrfs_group_profile_str(data_profile),
1268                                 pretty_size(allocation.mixed));
1269                 printf("  System:           %-8s %16s\n",
1270                         btrfs_group_profile_str(metadata_profile),
1271                         pretty_size(allocation.system));
1272                 printf("SSD detected:       %s\n", ssd ? "yes" : "no");
1273                 btrfs_parse_features_to_string(features_buf, features);
1274                 printf("Incompat features:  %s", features_buf);
1275                 printf("\n");
1276
1277                 list_all_devices(root);
1278         }
1279
1280         /*
1281          * The filesystem is now fully set up, commit the remaining changes and
1282          * fix the signature as the last step before closing the devices.
1283          */
1284         fs_info->finalize_on_close = 1;
1285 out:
1286         close_ret = close_ctree(root);
1287
1288         if (!close_ret) {
1289                 optind = saved_optind;
1290                 dev_cnt = argc - optind;
1291                 while (dev_cnt-- > 0) {
1292                         file = argv[optind++];
1293                         if (is_block_device(file) == 1)
1294                                 btrfs_register_one_device(file);
1295                 }
1296         }
1297
1298         if (!ret && close_ret) {
1299                 ret = close_ret;
1300                 error("failed to close ctree, the filesystem may be inconsistent: %d",
1301                       ret);
1302         }
1303
1304         btrfs_close_all_devices();
1305         free(label);
1306
1307         return !!ret;
1308 error:
1309         if (fd > 0)
1310                 close(fd);
1311
1312         free(label);
1313         exit(1);
1314 success:
1315         exit(0);
1316 }