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/types.h>
  28 #include <sys/stat.h>
  29 /* #include <sys/dir.h> included via androidcompat.h */
  30 #include <fcntl.h>
  31 #include <unistd.h>
  32 #include <getopt.h>
  33 #include <uuid/uuid.h>
  34 #include <ctype.h>
  35 #include <sys/xattr.h>
  36 #include <limits.h>
  37 #include <linux/limits.h>
  38 #include <blkid/blkid.h>
  39 #include <ftw.h>
  40 #include "ctree.h"
  41 #include "disk-io.h"
  42 #include "volumes.h"
  43 #include "transaction.h"
  44 #include "utils.h"
  45 #include "list_sort.h"
  46 #include "help.h"
  47 #include "mkfs/common.h"
  48 #include "fsfeatures.h"
  49
  50 static u64 index_cnt = 2;
  51 static int verbose = 1;
  52
  53 struct directory_name_entry {
  54         const char *dir_name;
  55         const char *path;
  56         ino_t inum;
  57         struct list_head list;
  58 };
  59
  60 struct mkfs_allocation {
  61         u64 data;
  62         u64 metadata;
  63         u64 mixed;
  64         u64 system;
  65 };
  66
  67 static int create_metadata_block_groups(struct btrfs_root *root, int mixed,
  68                                 struct mkfs_allocation *allocation)
  69 {
  70         struct btrfs_fs_info *fs_info = root->fs_info;
  71         struct btrfs_trans_handle *trans;
  72         u64 bytes_used;
  73         u64 chunk_start = 0;
  74         u64 chunk_size = 0;
  75         int ret;
  76
  77         trans = btrfs_start_transaction(root, 1);
  78         bytes_used = btrfs_super_bytes_used(fs_info->super_copy);
  79
  80         root->fs_info->system_allocs = 1;
  81         ret = btrfs_make_block_group(trans, fs_info, bytes_used,
  82                                      BTRFS_BLOCK_GROUP_SYSTEM,
  83                                      BTRFS_FIRST_CHUNK_TREE_OBJECTID,
  84                                      0, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
  85         allocation->system += BTRFS_MKFS_SYSTEM_GROUP_SIZE;
  86         if (ret)
  87                 return ret;
  88
  89         if (mixed) {
  90                 ret = btrfs_alloc_chunk(trans, fs_info,
  91                                         &chunk_start, &chunk_size,
  92                                         BTRFS_BLOCK_GROUP_METADATA |
  93                                         BTRFS_BLOCK_GROUP_DATA);
  94                 if (ret == -ENOSPC) {
  95                         error("no space to allocate data/metadata chunk");
  96                         goto err;
  97                 }
  98                 if (ret)
  99                         return ret;
 100                 ret = btrfs_make_block_group(trans, fs_info, 0,
 101                                              BTRFS_BLOCK_GROUP_METADATA |
 102                                              BTRFS_BLOCK_GROUP_DATA,
 103                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 104                                              chunk_start, chunk_size);
 105                 if (ret)
 106                         return ret;
 107                 allocation->mixed += chunk_size;
 108         } else {
 109                 ret = btrfs_alloc_chunk(trans, fs_info,
 110                                         &chunk_start, &chunk_size,
 111                                         BTRFS_BLOCK_GROUP_METADATA);
 112                 if (ret == -ENOSPC) {
 113                         error("no space to allocate metadata chunk");
 114                         goto err;
 115                 }
 116                 if (ret)
 117                         return ret;
 118                 ret = btrfs_make_block_group(trans, fs_info, 0,
 119                                              BTRFS_BLOCK_GROUP_METADATA,
 120                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 121                                              chunk_start, chunk_size);
 122                 allocation->metadata += chunk_size;
 123                 if (ret)
 124                         return ret;
 125         }
 126
 127         root->fs_info->system_allocs = 0;
 128         ret = btrfs_commit_transaction(trans, root);
 129
 130 err:
 131         return ret;
 132 }
 133
 134 static int create_data_block_groups(struct btrfs_trans_handle *trans,
 135                 struct btrfs_root *root, int mixed,
 136                 struct mkfs_allocation *allocation)
 137 {
 138         struct btrfs_fs_info *fs_info = root->fs_info;
 139         u64 chunk_start = 0;
 140         u64 chunk_size = 0;
 141         int ret = 0;
 142
 143         if (!mixed) {
 144                 ret = btrfs_alloc_chunk(trans, fs_info,
 145                                         &chunk_start, &chunk_size,
 146                                         BTRFS_BLOCK_GROUP_DATA);
 147                 if (ret == -ENOSPC) {
 148                         error("no space to allocate data chunk");
 149                         goto err;
 150                 }
 151                 if (ret)
 152                         return ret;
 153                 ret = btrfs_make_block_group(trans, fs_info, 0,
 154                                              BTRFS_BLOCK_GROUP_DATA,
 155                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 156                                              chunk_start, chunk_size);
 157                 allocation->data += chunk_size;
 158                 if (ret)
 159                         return ret;
 160         }
 161
 162 err:
 163         return ret;
 164 }
 165
 166 static int make_root_dir(struct btrfs_trans_handle *trans,
 167                 struct btrfs_root *root)
 168 {
 169         struct btrfs_key location;
 170         int ret;
 171
 172         ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
 173                               BTRFS_ROOT_TREE_DIR_OBJECTID);
 174         if (ret)
 175                 goto err;
 176         ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
 177         if (ret)
 178                 goto err;
 179         memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
 180         location.offset = (u64)-1;
 181         ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
 182                         "default", 7,
 183                         btrfs_super_root_dir(root->fs_info->super_copy),
 184                         &location, BTRFS_FT_DIR, 0);
 185         if (ret)
 186                 goto err;
 187
 188         ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
 189                              "default", 7, location.objectid,
 190                              BTRFS_ROOT_TREE_DIR_OBJECTID, 0);
 191         if (ret)
 192                 goto err;
 193
 194 err:
 195         return ret;
 196 }
 197
 198 static int __recow_root(struct btrfs_trans_handle *trans,
 199                          struct btrfs_root *root)
 200 {
 201         struct extent_buffer *tmp;
 202         int ret;
 203
 204         if (trans->transid != btrfs_root_generation(&root->root_item)) {
 205                 extent_buffer_get(root->node);
 206                 ret = __btrfs_cow_block(trans, root, root->node,
 207                                         NULL, 0, &tmp, 0, 0);
 208                 if (ret)
 209                         return ret;
 210                 free_extent_buffer(tmp);
 211         }
 212
 213         return 0;
 214 }
 215
 216 static int recow_roots(struct btrfs_trans_handle *trans,
 217                        struct btrfs_root *root)
 218 {
 219         struct btrfs_fs_info *info = root->fs_info;
 220         int ret;
 221
 222         ret = __recow_root(trans, info->fs_root);
 223         if (ret)
 224                 return ret;
 225         ret = __recow_root(trans, info->tree_root);
 226         if (ret)
 227                 return ret;
 228         ret = __recow_root(trans, info->extent_root);
 229         if (ret)
 230                 return ret;
 231         ret = __recow_root(trans, info->chunk_root);
 232         if (ret)
 233                 return ret;
 234         ret = __recow_root(trans, info->dev_root);
 235         if (ret)
 236                 return ret;
 237         ret = __recow_root(trans, info->csum_root);
 238         if (ret)
 239                 return ret;
 240
 241         return 0;
 242 }
 243
 244 static int create_one_raid_group(struct btrfs_trans_handle *trans,
 245                               struct btrfs_root *root, u64 type,
 246                               struct mkfs_allocation *allocation)
 247
 248 {
 249         struct btrfs_fs_info *fs_info = root->fs_info;
 250         u64 chunk_start;
 251         u64 chunk_size;
 252         int ret;
 253
 254         ret = btrfs_alloc_chunk(trans, fs_info,
 255                                 &chunk_start, &chunk_size, type);
 256         if (ret == -ENOSPC) {
 257                 error("not enough free space to allocate chunk");
 258                 exit(1);
 259         }
 260         if (ret)
 261                 return ret;
 262
 263         ret = btrfs_make_block_group(trans, fs_info, 0,
 264                                      type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 265                                      chunk_start, chunk_size);
 266
 267         type &= BTRFS_BLOCK_GROUP_TYPE_MASK;
 268         if (type == BTRFS_BLOCK_GROUP_DATA) {
 269                 allocation->data += chunk_size;
 270         } else if (type == BTRFS_BLOCK_GROUP_METADATA) {
 271                 allocation->metadata += chunk_size;
 272         } else if (type == BTRFS_BLOCK_GROUP_SYSTEM) {
 273                 allocation->system += chunk_size;
 274         } else if (type ==
 275                         (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA)) {
 276                 allocation->mixed += chunk_size;
 277         } else {
 278                 error("unrecognized profile type: 0x%llx",
 279                                 (unsigned long long)type);
 280                 ret = -EINVAL;
 281         }
 282
 283         return ret;
 284 }
 285
 286 static int create_raid_groups(struct btrfs_trans_handle *trans,
 287                               struct btrfs_root *root, u64 data_profile,
 288                               u64 metadata_profile, int mixed,
 289                               struct mkfs_allocation *allocation)
 290 {
 291         int ret;
 292
 293         if (metadata_profile) {
 294                 u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA;
 295
 296                 ret = create_one_raid_group(trans, root,
 297                                             BTRFS_BLOCK_GROUP_SYSTEM |
 298                                             metadata_profile, allocation);
 299                 if (ret)
 300                         return ret;
 301
 302                 if (mixed)
 303                         meta_flags |= BTRFS_BLOCK_GROUP_DATA;
 304
 305                 ret = create_one_raid_group(trans, root, meta_flags |
 306                                             metadata_profile, allocation);
 307                 if (ret)
 308                         return ret;
 309
 310         }
 311         if (!mixed && data_profile) {
 312                 ret = create_one_raid_group(trans, root,
 313                                             BTRFS_BLOCK_GROUP_DATA |
 314                                             data_profile, allocation);
 315                 if (ret)
 316                         return ret;
 317         }
 318         ret = recow_roots(trans, root);
 319
 320         return ret;
 321 }
 322
 323 static int create_data_reloc_tree(struct btrfs_trans_handle *trans,
 324                                   struct btrfs_root *root)
 325 {
 326         struct btrfs_key location;
 327         struct btrfs_root_item root_item;
 328         struct extent_buffer *tmp;
 329         u64 objectid = BTRFS_DATA_RELOC_TREE_OBJECTID;
 330         int ret;
 331
 332         ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
 333         if (ret)
 334                 return ret;
 335
 336         memcpy(&root_item, &root->root_item, sizeof(root_item));
 337         btrfs_set_root_bytenr(&root_item, tmp->start);
 338         btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
 339         btrfs_set_root_generation(&root_item, trans->transid);
 340         free_extent_buffer(tmp);
 341
 342         location.objectid = objectid;
 343         location.type = BTRFS_ROOT_ITEM_KEY;
 344         location.offset = 0;
 345         ret = btrfs_insert_root(trans, root->fs_info->tree_root,
 346                                 &location, &root_item);
 347
 348         return ret;
 349 }
 350
 351 static void print_usage(int ret)
 352 {
 353         printf("Usage: mkfs.btrfs [options] dev [ dev ... ]\n");
 354         printf("Options:\n");
 355         printf("  allocation profiles:\n");
 356         printf("\t-d|--data PROFILE       data profile, raid0, raid1, raid5, raid6, raid10, dup or single\n");
 357         printf("\t-m|--metadata PROFILE   metadata profile, values like for data profile\n");
 358         printf("\t-M|--mixed              mix metadata and data together\n");
 359         printf("  features:\n");
 360         printf("\t-n|--nodesize SIZE      size of btree nodes\n");
 361         printf("\t-s|--sectorsize SIZE    data block size (may not be mountable by current kernel)\n");
 362         printf("\t-O|--features LIST      comma separated list of filesystem features (use '-O list-all' to list features)\n");
 363         printf("\t-L|--label LABEL        set the filesystem label\n");
 364         printf("\t-U|--uuid UUID          specify the filesystem UUID (must be unique)\n");
 365         printf("  creation:\n");
 366         printf("\t-b|--byte-count SIZE    set filesystem size to SIZE (on the first device)\n");
 367         printf("\t-r|--rootdir DIR        copy files from DIR to the image root directory\n");
 368         printf("\t-K|--nodiscard          do not perform whole device TRIM\n");
 369         printf("\t-f|--force              force overwrite of existing filesystem\n");
 370         printf("  general:\n");
 371         printf("\t-q|--quiet              no messages except errors\n");
 372         printf("\t-V|--version            print the mkfs.btrfs version and exit\n");
 373         printf("\t--help                  print this help and exit\n");
 374         printf("  deprecated:\n");
 375         printf("\t-A|--alloc-start START  the offset to start the filesystem\n");
 376         printf("\t-l|--leafsize SIZE      deprecated, alias for nodesize\n");
 377         exit(ret);
 378 }
 379
 380 static u64 parse_profile(const char *s)
 381 {
 382         if (strcasecmp(s, "raid0") == 0) {
 383                 return BTRFS_BLOCK_GROUP_RAID0;
 384         } else if (strcasecmp(s, "raid1") == 0) {
 385                 return BTRFS_BLOCK_GROUP_RAID1;
 386         } else if (strcasecmp(s, "raid5") == 0) {
 387                 return BTRFS_BLOCK_GROUP_RAID5;
 388         } else if (strcasecmp(s, "raid6") == 0) {
 389                 return BTRFS_BLOCK_GROUP_RAID6;
 390         } else if (strcasecmp(s, "raid10") == 0) {
 391                 return BTRFS_BLOCK_GROUP_RAID10;
 392         } else if (strcasecmp(s, "dup") == 0) {
 393                 return BTRFS_BLOCK_GROUP_DUP;
 394         } else if (strcasecmp(s, "single") == 0) {
 395                 return 0;
 396         } else {
 397                 error("unknown profile %s", s);
 398                 exit(1);
 399         }
 400         /* not reached */
 401         return 0;
 402 }
 403
 404 static char *parse_label(const char *input)
 405 {
 406         int len = strlen(input);
 407
 408         if (len >= BTRFS_LABEL_SIZE) {
 409                 error("label %s is too long (max %d)", input,
 410                         BTRFS_LABEL_SIZE - 1);
 411                 exit(1);
 412         }
 413         return strdup(input);
 414 }
 415
 416 static int add_directory_items(struct btrfs_trans_handle *trans,
 417                                struct btrfs_root *root, u64 objectid,
 418                                ino_t parent_inum, const char *name,
 419                                struct stat *st, int *dir_index_cnt)
 420 {
 421         int ret;
 422         int name_len;
 423         struct btrfs_key location;
 424         u8 filetype = 0;
 425
 426         name_len = strlen(name);
 427
 428         location.objectid = objectid;
 429         location.offset = 0;
 430         location.type = BTRFS_INODE_ITEM_KEY;
 431
 432         if (S_ISDIR(st->st_mode))
 433                 filetype = BTRFS_FT_DIR;
 434         if (S_ISREG(st->st_mode))
 435                 filetype = BTRFS_FT_REG_FILE;
 436         if (S_ISLNK(st->st_mode))
 437                 filetype = BTRFS_FT_SYMLINK;
 438
 439         ret = btrfs_insert_dir_item(trans, root, name, name_len,
 440                                     parent_inum, &location,
 441                                     filetype, index_cnt);
 442         if (ret)
 443                 return ret;
 444         ret = btrfs_insert_inode_ref(trans, root, name, name_len,
 445                                      objectid, parent_inum, index_cnt);
 446         *dir_index_cnt = index_cnt;
 447         index_cnt++;
 448
 449         return ret;
 450 }
 451
 452 static int fill_inode_item(struct btrfs_trans_handle *trans,
 453                            struct btrfs_root *root,
 454                            struct btrfs_inode_item *dst, struct stat *src)
 455 {
 456         u64 blocks = 0;
 457         u64 sectorsize = root->fs_info->sectorsize;
 458
 459         /*
 460          * btrfs_inode_item has some reserved fields
 461          * and represents on-disk inode entry, so
 462          * zero everything to prevent information leak
 463          */
 464         memset(dst, 0, sizeof (*dst));
 465
 466         btrfs_set_stack_inode_generation(dst, trans->transid);
 467         btrfs_set_stack_inode_size(dst, src->st_size);
 468         btrfs_set_stack_inode_nbytes(dst, 0);
 469         btrfs_set_stack_inode_block_group(dst, 0);
 470         btrfs_set_stack_inode_nlink(dst, src->st_nlink);
 471         btrfs_set_stack_inode_uid(dst, src->st_uid);
 472         btrfs_set_stack_inode_gid(dst, src->st_gid);
 473         btrfs_set_stack_inode_mode(dst, src->st_mode);
 474         btrfs_set_stack_inode_rdev(dst, 0);
 475         btrfs_set_stack_inode_flags(dst, 0);
 476         btrfs_set_stack_timespec_sec(&dst->atime, src->st_atime);
 477         btrfs_set_stack_timespec_nsec(&dst->atime, 0);
 478         btrfs_set_stack_timespec_sec(&dst->ctime, src->st_ctime);
 479         btrfs_set_stack_timespec_nsec(&dst->ctime, 0);
 480         btrfs_set_stack_timespec_sec(&dst->mtime, src->st_mtime);
 481         btrfs_set_stack_timespec_nsec(&dst->mtime, 0);
 482         btrfs_set_stack_timespec_sec(&dst->otime, 0);
 483         btrfs_set_stack_timespec_nsec(&dst->otime, 0);
 484
 485         if (S_ISDIR(src->st_mode)) {
 486                 btrfs_set_stack_inode_size(dst, 0);
 487                 btrfs_set_stack_inode_nlink(dst, 1);
 488         }
 489         if (S_ISREG(src->st_mode)) {
 490                 btrfs_set_stack_inode_size(dst, (u64)src->st_size);
 491                 if (src->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root))
 492                         btrfs_set_stack_inode_nbytes(dst, src->st_size);
 493                 else {
 494                         blocks = src->st_size / sectorsize;
 495                         if (src->st_size % sectorsize)
 496                                 blocks += 1;
 497                         blocks *= sectorsize;
 498                         btrfs_set_stack_inode_nbytes(dst, blocks);
 499                 }
 500         }
 501         if (S_ISLNK(src->st_mode))
 502                 btrfs_set_stack_inode_nbytes(dst, src->st_size + 1);
 503
 504         return 0;
 505 }
 506
 507 static int directory_select(const struct direct *entry)
 508 {
 509         if (entry->d_name[0] == '.' &&
 510                 (entry->d_name[1] == 0 ||
 511                  (entry->d_name[1] == '.' && entry->d_name[2] == 0)))
 512                 return 0;
 513         return 1;
 514 }
 515
 516 static void free_namelist(struct direct **files, int count)
 517 {
 518         int i;
 519
 520         if (count < 0)
 521                 return;
 522
 523         for (i = 0; i < count; ++i)
 524                 free(files[i]);
 525         free(files);
 526 }
 527
 528 static u64 calculate_dir_inode_size(const char *dirname)
 529 {
 530         int count, i;
 531         struct direct **files, *cur_file;
 532         u64 dir_inode_size = 0;
 533
 534         count = scandir(dirname, &files, directory_select, NULL);
 535
 536         for (i = 0; i < count; i++) {
 537                 cur_file = files[i];
 538                 dir_inode_size += strlen(cur_file->d_name);
 539         }
 540
 541         free_namelist(files, count);
 542
 543         dir_inode_size *= 2;
 544         return dir_inode_size;
 545 }
 546
 547 static int add_inode_items(struct btrfs_trans_handle *trans,
 548                            struct btrfs_root *root,
 549                            struct stat *st, const char *name,
 550                            u64 self_objectid,
 551                            struct btrfs_inode_item *inode_ret)
 552 {
 553         int ret;
 554         struct btrfs_inode_item btrfs_inode;
 555         u64 objectid;
 556         u64 inode_size = 0;
 557
 558         fill_inode_item(trans, root, &btrfs_inode, st);
 559         objectid = self_objectid;
 560
 561         if (S_ISDIR(st->st_mode)) {
 562                 inode_size = calculate_dir_inode_size(name);
 563                 btrfs_set_stack_inode_size(&btrfs_inode, inode_size);
 564         }
 565
 566         ret = btrfs_insert_inode(trans, root, objectid, &btrfs_inode);
 567
 568         *inode_ret = btrfs_inode;
 569         return ret;
 570 }
 571
 572 static int add_xattr_item(struct btrfs_trans_handle *trans,
 573                           struct btrfs_root *root, u64 objectid,
 574                           const char *file_name)
 575 {
 576         int ret;
 577         int cur_name_len;
 578         char xattr_list[XATTR_LIST_MAX];
 579         char *cur_name;
 580         char cur_value[XATTR_SIZE_MAX];
 581         char delimiter = '\0';
 582         char *next_location = xattr_list;
 583
 584         ret = llistxattr(file_name, xattr_list, XATTR_LIST_MAX);
 585         if (ret < 0) {
 586                 if(errno == ENOTSUP)
 587                         return 0;
 588                 error("getting a list of xattr failed for %s: %s", file_name,
 589                                 strerror(errno));
 590                 return ret;
 591         }
 592         if (ret == 0)
 593                 return ret;
 594
 595         cur_name = strtok(xattr_list, &delimiter);
 596         while (cur_name != NULL) {
 597                 cur_name_len = strlen(cur_name);
 598                 next_location += cur_name_len + 1;
 599
 600                 ret = getxattr(file_name, cur_name, cur_value, XATTR_SIZE_MAX);
 601                 if (ret < 0) {
 602                         if(errno == ENOTSUP)
 603                                 return 0;
 604                         error("gettig a xattr value failed for %s attr %s: %s",
 605                                 file_name, cur_name, strerror(errno));
 606                         return ret;
 607                 }
 608
 609                 ret = btrfs_insert_xattr_item(trans, root, cur_name,
 610                                               cur_name_len, cur_value,
 611                                               ret, objectid);
 612                 if (ret) {
 613                         error("inserting a xattr item failed for %s: %s",
 614                                         file_name, strerror(-ret));
 615                 }
 616
 617                 cur_name = strtok(next_location, &delimiter);
 618         }
 619
 620         return ret;
 621 }
 622
 623 static int add_symbolic_link(struct btrfs_trans_handle *trans,
 624                              struct btrfs_root *root,
 625                              u64 objectid, const char *path_name)
 626 {
 627         int ret;
 628         char buf[PATH_MAX];
 629
 630         ret = readlink(path_name, buf, sizeof(buf));
 631         if (ret <= 0) {
 632                 error("readlink failed for %s: %s", path_name, strerror(errno));
 633                 goto fail;
 634         }
 635         if (ret >= sizeof(buf)) {
 636                 error("symlink too long for %s", path_name);
 637                 ret = -1;
 638                 goto fail;
 639         }
 640
 641         buf[ret] = '\0'; /* readlink does not do it for us */
 642         ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
 643                                          buf, ret + 1);
 644 fail:
 645         return ret;
 646 }
 647
 648 static int add_file_items(struct btrfs_trans_handle *trans,
 649                           struct btrfs_root *root,
 650                           struct btrfs_inode_item *btrfs_inode, u64 objectid,
 651                           struct stat *st, const char *path_name)
 652 {
 653         int ret = -1;
 654         ssize_t ret_read;
 655         u64 bytes_read = 0;
 656         struct btrfs_key key;
 657         int blocks;
 658         u32 sectorsize = root->fs_info->sectorsize;
 659         u64 first_block = 0;
 660         u64 file_pos = 0;
 661         u64 cur_bytes;
 662         u64 total_bytes;
 663         struct extent_buffer *eb = NULL;
 664         int fd;
 665
 666         if (st->st_size == 0)
 667                 return 0;
 668
 669         fd = open(path_name, O_RDONLY);
 670         if (fd == -1) {
 671                 error("cannot open %s: %s", path_name, strerror(errno));
 672                 return ret;
 673         }
 674
 675         blocks = st->st_size / sectorsize;
 676         if (st->st_size % sectorsize)
 677                 blocks += 1;
 678
 679         if (st->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root)) {
 680                 char *buffer = malloc(st->st_size);
 681
 682                 if (!buffer) {
 683                         ret = -ENOMEM;
 684                         goto end;
 685                 }
 686
 687                 ret_read = pread64(fd, buffer, st->st_size, bytes_read);
 688                 if (ret_read == -1) {
 689                         error("cannot read %s at offset %llu length %llu: %s",
 690                                 path_name, (unsigned long long)bytes_read,
 691                                 (unsigned long long)st->st_size,
 692                                 strerror(errno));
 693                         free(buffer);
 694                         goto end;
 695                 }
 696
 697                 ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
 698                                                  buffer, st->st_size);
 699                 free(buffer);
 700                 goto end;
 701         }
 702
 703         /* round up our st_size to the FS blocksize */
 704         total_bytes = (u64)blocks * sectorsize;
 705
 706         /*
 707          * do our IO in extent buffers so it can work
 708          * against any raid type
 709          */
 710         eb = calloc(1, sizeof(*eb) + sectorsize);
 711         if (!eb) {
 712                 ret = -ENOMEM;
 713                 goto end;
 714         }
 715
 716 again:
 717
 718         /*
 719          * keep our extent size at 1MB max, this makes it easier to work inside
 720          * the tiny block groups created during mkfs
 721          */
 722         cur_bytes = min(total_bytes, 1024ULL * 1024);
 723         ret = btrfs_reserve_extent(trans, root, cur_bytes, 0, 0, (u64)-1,
 724                                    &key, 1);
 725         if (ret)
 726                 goto end;
 727
 728         first_block = key.objectid;
 729         bytes_read = 0;
 730
 731         while (bytes_read < cur_bytes) {
 732
 733                 memset(eb->data, 0, sectorsize);
 734
 735                 ret_read = pread64(fd, eb->data, sectorsize, file_pos + bytes_read);
 736                 if (ret_read == -1) {
 737                         error("cannot read %s at offset %llu length %llu: %s",
 738                                 path_name,
 739                                 (unsigned long long)file_pos + bytes_read,
 740                                 (unsigned long long)sectorsize,
 741                                 strerror(errno));
 742                         goto end;
 743                 }
 744
 745                 eb->start = first_block + bytes_read;
 746                 eb->len = sectorsize;
 747
 748                 /*
 749                  * we're doing the csum before we record the extent, but
 750                  * that's ok
 751                  */
 752                 ret = btrfs_csum_file_block(trans, root->fs_info->csum_root,
 753                                             first_block + bytes_read + sectorsize,
 754                                             first_block + bytes_read,
 755                                             eb->data, sectorsize);
 756                 if (ret)
 757                         goto end;
 758
 759                 ret = write_and_map_eb(root->fs_info, eb);
 760                 if (ret) {
 761                         error("failed to write %s", path_name);
 762                         goto end;
 763                 }
 764
 765                 bytes_read += sectorsize;
 766         }
 767
 768         if (bytes_read) {
 769                 ret = btrfs_record_file_extent(trans, root, objectid, btrfs_inode,
 770                                                file_pos, first_block, cur_bytes);
 771                 if (ret)
 772                         goto end;
 773
 774         }
 775
 776         file_pos += cur_bytes;
 777         total_bytes -= cur_bytes;
 778
 779         if (total_bytes)
 780                 goto again;
 781
 782 end:
 783         free(eb);
 784         close(fd);
 785         return ret;
 786 }
 787
 788 static char *make_path(const char *dir, const char *name)
 789 {
 790         char *path;
 791
 792         path = malloc(strlen(dir) + strlen(name) + 2);
 793         if (!path)
 794                 return NULL;
 795         strcpy(path, dir);
 796         if (dir[strlen(dir) - 1] != '/')
 797                 strcat(path, "/");
 798         strcat(path, name);
 799         return path;
 800 }
 801
 802 static int traverse_directory(struct btrfs_trans_handle *trans,
 803                               struct btrfs_root *root, const char *dir_name,
 804                               struct directory_name_entry *dir_head, int out_fd)
 805 {
 806         int ret = 0;
 807
 808         struct btrfs_inode_item cur_inode;
 809         struct btrfs_inode_item *inode_item;
 810         int count, i, dir_index_cnt;
 811         struct direct **files;
 812         struct stat st;
 813         struct directory_name_entry *dir_entry, *parent_dir_entry;
 814         struct direct *cur_file;
 815         ino_t parent_inum, cur_inum;
 816         ino_t highest_inum = 0;
 817         const char *parent_dir_name;
 818         char real_path[PATH_MAX];
 819         struct btrfs_path path;
 820         struct extent_buffer *leaf;
 821         struct btrfs_key root_dir_key;
 822         u64 root_dir_inode_size = 0;
 823
 824         /* Add list for source directory */
 825         dir_entry = malloc(sizeof(struct directory_name_entry));
 826         if (!dir_entry)
 827                 return -ENOMEM;
 828         dir_entry->dir_name = dir_name;
 829         dir_entry->path = realpath(dir_name, real_path);
 830         if (!dir_entry->path) {
 831                 error("realpath  failed for %s: %s", dir_name, strerror(errno));
 832                 ret = -1;
 833                 goto fail_no_dir;
 834         }
 835
 836         parent_inum = highest_inum + BTRFS_FIRST_FREE_OBJECTID;
 837         dir_entry->inum = parent_inum;
 838         list_add_tail(&dir_entry->list, &dir_head->list);
 839
 840         btrfs_init_path(&path);
 841
 842         root_dir_key.objectid = btrfs_root_dirid(&root->root_item);
 843         root_dir_key.offset = 0;
 844         root_dir_key.type = BTRFS_INODE_ITEM_KEY;
 845         ret = btrfs_lookup_inode(trans, root, &path, &root_dir_key, 1);
 846         if (ret) {
 847                 error("failed to lookup root dir: %d", ret);
 848                 goto fail_no_dir;
 849         }
 850
 851         leaf = path.nodes[0];
 852         inode_item = btrfs_item_ptr(leaf, path.slots[0],
 853                                     struct btrfs_inode_item);
 854
 855         root_dir_inode_size = calculate_dir_inode_size(dir_name);
 856         btrfs_set_inode_size(leaf, inode_item, root_dir_inode_size);
 857         btrfs_mark_buffer_dirty(leaf);
 858
 859         btrfs_release_path(&path);
 860
 861         do {
 862                 parent_dir_entry = list_entry(dir_head->list.next,
 863                                               struct directory_name_entry,
 864                                               list);
 865                 list_del(&parent_dir_entry->list);
 866
 867                 parent_inum = parent_dir_entry->inum;
 868                 parent_dir_name = parent_dir_entry->dir_name;
 869                 if (chdir(parent_dir_entry->path)) {
 870                         error("chdir failed for %s: %s",
 871                                 parent_dir_name, strerror(errno));
 872                         ret = -1;
 873                         goto fail_no_files;
 874                 }
 875
 876                 count = scandir(parent_dir_entry->path, &files,
 877                                 directory_select, NULL);
 878                 if (count == -1)
 879                 {
 880                         error("scandir failed for %s: %s",
 881                                 parent_dir_name, strerror (errno));
 882                         ret = -1;
 883                         goto fail;
 884                 }
 885
 886                 for (i = 0; i < count; i++) {
 887                         cur_file = files[i];
 888
 889                         if (lstat(cur_file->d_name, &st) == -1) {
 890                                 error("lstat failed for %s: %s",
 891                                         cur_file->d_name, strerror(errno));
 892                                 ret = -1;
 893                                 goto fail;
 894                         }
 895
 896                         cur_inum = st.st_ino;
 897                         ret = add_directory_items(trans, root,
 898                                                   cur_inum, parent_inum,
 899                                                   cur_file->d_name,
 900                                                   &st, &dir_index_cnt);
 901                         if (ret) {
 902                                 error("unable to add directory items for %s: %d",
 903                                         cur_file->d_name, ret);
 904                                 goto fail;
 905                         }
 906
 907                         ret = add_inode_items(trans, root, &st,
 908                                               cur_file->d_name, cur_inum,
 909                                               &cur_inode);
 910                         if (ret == -EEXIST) {
 911                                 if (st.st_nlink <= 1) {
 912                                         error(
 913                         "item %s already exists but has wrong st_nlink %lu <= 1",
 914                                                 cur_file->d_name,
 915                                                 (unsigned long)st.st_nlink);
 916                                         goto fail;
 917                                 }
 918                                 continue;
 919                         }
 920                         if (ret) {
 921                                 error("unable to add inode items for %s: %d",
 922                                         cur_file->d_name, ret);
 923                                 goto fail;
 924                         }
 925
 926                         ret = add_xattr_item(trans, root,
 927                                              cur_inum, cur_file->d_name);
 928                         if (ret) {
 929                                 error("unable to add xattr items for %s: %d",
 930                                         cur_file->d_name, ret);
 931                                 if(ret != -ENOTSUP)
 932                                         goto fail;
 933                         }
 934
 935                         if (S_ISDIR(st.st_mode)) {
 936                                 dir_entry = malloc(sizeof(struct directory_name_entry));
 937                                 if (!dir_entry) {
 938                                         ret = -ENOMEM;
 939                                         goto fail;
 940                                 }
 941                                 dir_entry->dir_name = cur_file->d_name;
 942                                 dir_entry->path = make_path(parent_dir_entry->path,
 943                                                             cur_file->d_name);
 944                                 dir_entry->inum = cur_inum;
 945                                 list_add_tail(&dir_entry->list, &dir_head->list);
 946                         } else if (S_ISREG(st.st_mode)) {
 947                                 ret = add_file_items(trans, root, &cur_inode,
 948                                                      cur_inum, &st,
 949                                                      cur_file->d_name);
 950                                 if (ret) {
 951                                         error("unable to add file items for %s: %d",
 952                                                 cur_file->d_name, ret);
 953                                         goto fail;
 954                                 }
 955                         } else if (S_ISLNK(st.st_mode)) {
 956                                 ret = add_symbolic_link(trans, root,
 957                                                         cur_inum, cur_file->d_name);
 958                                 if (ret) {
 959                                         error("unable to add symlink for %s: %d",
 960                                                 cur_file->d_name, ret);
 961                                         goto fail;
 962                                 }
 963                         }
 964                 }
 965
 966                 free_namelist(files, count);
 967                 free(parent_dir_entry);
 968
 969                 index_cnt = 2;
 970
 971         } while (!list_empty(&dir_head->list));
 972
 973 out:
 974         return !!ret;
 975 fail:
 976         free_namelist(files, count);
 977 fail_no_files:
 978         free(parent_dir_entry);
 979         goto out;
 980 fail_no_dir:
 981         free(dir_entry);
 982         goto out;
 983 }
 984
 985 static int create_chunks(struct btrfs_trans_handle *trans,
 986                          struct btrfs_root *root, u64 num_of_meta_chunks,
 987                          u64 size_of_data,
 988                          struct mkfs_allocation *allocation)
 989 {
 990         struct btrfs_fs_info *fs_info = root->fs_info;
 991         u64 chunk_start;
 992         u64 chunk_size;
 993         u64 meta_type = BTRFS_BLOCK_GROUP_METADATA;
 994         u64 data_type = BTRFS_BLOCK_GROUP_DATA;
 995         u64 minimum_data_chunk_size = 8 * 1024 * 1024;
 996         u64 i;
 997         int ret;
 998
 999         for (i = 0; i < num_of_meta_chunks; i++) {
1000                 ret = btrfs_alloc_chunk(trans, fs_info,
1001                                         &chunk_start, &chunk_size, meta_type);
1002                 if (ret)
1003                         return ret;
1004                 ret = btrfs_make_block_group(trans, fs_info, 0,
1005                                              meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1006                                              chunk_start, chunk_size);
1007                 allocation->metadata += chunk_size;
1008                 if (ret)
1009                         return ret;
1010                 set_extent_dirty(&root->fs_info->free_space_cache,
1011                                  chunk_start, chunk_start + chunk_size - 1);
1012         }
1013
1014         if (size_of_data < minimum_data_chunk_size)
1015                 size_of_data = minimum_data_chunk_size;
1016
1017         ret = btrfs_alloc_data_chunk(trans, fs_info,
1018                                      &chunk_start, size_of_data, data_type, 0);
1019         if (ret)
1020                 return ret;
1021         ret = btrfs_make_block_group(trans, fs_info, 0,
1022                                      data_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1023                                      chunk_start, size_of_data);
1024         allocation->data += size_of_data;
1025         if (ret)
1026                 return ret;
1027         set_extent_dirty(&root->fs_info->free_space_cache,
1028                          chunk_start, chunk_start + size_of_data - 1);
1029         return ret;
1030 }
1031
1032 static int make_image(const char *source_dir, struct btrfs_root *root,
1033                 int out_fd)
1034 {
1035         int ret;
1036         struct btrfs_trans_handle *trans;
1037         struct stat root_st;
1038         struct directory_name_entry dir_head;
1039         struct directory_name_entry *dir_entry = NULL;
1040
1041         ret = lstat(source_dir, &root_st);
1042         if (ret) {
1043                 error("unable to lstat %s: %s", source_dir, strerror(errno));
1044                 ret = -errno;
1045                 goto out;
1046         }
1047
1048         INIT_LIST_HEAD(&dir_head.list);
1049
1050         trans = btrfs_start_transaction(root, 1);
1051         ret = traverse_directory(trans, root, source_dir, &dir_head, out_fd);
1052         if (ret) {
1053                 error("unable to traverse directory %s: %d", source_dir, ret);
1054                 goto fail;
1055         }
1056         ret = btrfs_commit_transaction(trans, root);
1057         if (ret) {
1058                 error("transaction commit failed: %d", ret);
1059                 goto out;
1060         }
1061
1062         if (verbose)
1063                 printf("Making image is completed.\n");
1064         return 0;
1065 fail:
1066         while (!list_empty(&dir_head.list)) {
1067                 dir_entry = list_entry(dir_head.list.next,
1068                                        struct directory_name_entry, list);
1069                 list_del(&dir_entry->list);
1070                 free(dir_entry);
1071         }
1072 out:
1073         return ret;
1074 }
1075
1076 /*
1077  * This ignores symlinks with unreadable targets and subdirs that can't
1078  * be read.  It's a best-effort to give a rough estimate of the size of
1079  * a subdir.  It doesn't guarantee that prepopulating btrfs from this
1080  * tree won't still run out of space.
1081  */
1082 static u64 global_total_size;
1083 static u64 fs_block_size;
1084 static int ftw_add_entry_size(const char *fpath, const struct stat *st,
1085                               int type)
1086 {
1087         if (type == FTW_F || type == FTW_D)
1088                 global_total_size += round_up(st->st_size, fs_block_size);
1089
1090         return 0;
1091 }
1092
1093 static u64 size_sourcedir(const char *dir_name, u64 sectorsize,
1094                           u64 *num_of_meta_chunks_ret, u64 *size_of_data_ret)
1095 {
1096         u64 dir_size = 0;
1097         u64 total_size = 0;
1098         int ret;
1099         u64 default_chunk_size = 8 * 1024 * 1024;       /* 8MB */
1100         u64 allocated_meta_size = 8 * 1024 * 1024;      /* 8MB */
1101         u64 allocated_total_size = 20 * 1024 * 1024;    /* 20MB */
1102         u64 num_of_meta_chunks = 0;
1103         u64 num_of_data_chunks = 0;
1104         u64 num_of_allocated_meta_chunks =
1105                         allocated_meta_size / default_chunk_size;
1106
1107         global_total_size = 0;
1108         fs_block_size = sectorsize;
1109         ret = ftw(dir_name, ftw_add_entry_size, 10);
1110         dir_size = global_total_size;
1111         if (ret < 0) {
1112                 error("ftw subdir walk of %s failed: %s", dir_name,
1113                         strerror(errno));
1114                 exit(1);
1115         }
1116
1117         num_of_data_chunks = (dir_size + default_chunk_size - 1) /
1118                 default_chunk_size;
1119
1120         num_of_meta_chunks = (dir_size / 2) / default_chunk_size;
1121         if (((dir_size / 2) % default_chunk_size) != 0)
1122                 num_of_meta_chunks++;
1123         if (num_of_meta_chunks <= num_of_allocated_meta_chunks)
1124                 num_of_meta_chunks = 0;
1125         else
1126                 num_of_meta_chunks -= num_of_allocated_meta_chunks;
1127
1128         total_size = allocated_total_size +
1129                      (num_of_data_chunks * default_chunk_size) +
1130                      (num_of_meta_chunks * default_chunk_size);
1131
1132         *num_of_meta_chunks_ret = num_of_meta_chunks;
1133         *size_of_data_ret = num_of_data_chunks * default_chunk_size;
1134         return total_size;
1135 }
1136
1137 static int zero_output_file(int out_fd, u64 size)
1138 {
1139         int loop_num;
1140         u64 location = 0;
1141         char buf[4096];
1142         int ret = 0, i;
1143         ssize_t written;
1144
1145         memset(buf, 0, 4096);
1146         loop_num = size / 4096;
1147         for (i = 0; i < loop_num; i++) {
1148                 written = pwrite64(out_fd, buf, 4096, location);
1149                 if (written != 4096)
1150                         ret = -EIO;
1151                 location += 4096;
1152         }
1153         return ret;
1154 }
1155
1156 static int is_ssd(const char *file)
1157 {
1158         blkid_probe probe;
1159         char wholedisk[PATH_MAX];
1160         char sysfs_path[PATH_MAX];
1161         dev_t devno;
1162         int fd;
1163         char rotational;
1164         int ret;
1165
1166         probe = blkid_new_probe_from_filename(file);
1167         if (!probe)
1168                 return 0;
1169
1170         /* Device number of this disk (possibly a partition) */
1171         devno = blkid_probe_get_devno(probe);
1172         if (!devno) {
1173                 blkid_free_probe(probe);
1174                 return 0;
1175         }
1176
1177         /* Get whole disk name (not full path) for this devno */
1178         ret = blkid_devno_to_wholedisk(devno,
1179                         wholedisk, sizeof(wholedisk), NULL);
1180         if (ret) {
1181                 blkid_free_probe(probe);
1182                 return 0;
1183         }
1184
1185         snprintf(sysfs_path, PATH_MAX, "/sys/block/%s/queue/rotational",
1186                  wholedisk);
1187
1188         blkid_free_probe(probe);
1189
1190         fd = open(sysfs_path, O_RDONLY);
1191         if (fd < 0) {
1192                 return 0;
1193         }
1194
1195         if (read(fd, &rotational, 1) < 1) {
1196                 close(fd);
1197                 return 0;
1198         }
1199         close(fd);
1200
1201         return rotational == '0';
1202 }
1203
1204 static int _cmp_device_by_id(void *priv, struct list_head *a,
1205                              struct list_head *b)
1206 {
1207         return list_entry(a, struct btrfs_device, dev_list)->devid -
1208                list_entry(b, struct btrfs_device, dev_list)->devid;
1209 }
1210
1211 static void list_all_devices(struct btrfs_root *root)
1212 {
1213         struct btrfs_fs_devices *fs_devices;
1214         struct btrfs_device *device;
1215         int number_of_devices = 0;
1216         u64 total_block_count = 0;
1217
1218         fs_devices = root->fs_info->fs_devices;
1219
1220         list_for_each_entry(device, &fs_devices->devices, dev_list)
1221                 number_of_devices++;
1222
1223         list_sort(NULL, &fs_devices->devices, _cmp_device_by_id);
1224
1225         printf("Number of devices:  %d\n", number_of_devices);
1226         /* printf("Total devices size: %10s\n", */
1227                 /* pretty_size(total_block_count)); */
1228         printf("Devices:\n");
1229         printf("   ID        SIZE  PATH\n");
1230         list_for_each_entry(device, &fs_devices->devices, dev_list) {
1231                 printf("  %3llu  %10s  %s\n",
1232                         device->devid,
1233                         pretty_size(device->total_bytes),
1234                         device->name);
1235                 total_block_count += device->total_bytes;
1236         }
1237
1238         printf("\n");
1239 }
1240
1241 static int is_temp_block_group(struct extent_buffer *node,
1242                                struct btrfs_block_group_item *bgi,
1243                                u64 data_profile, u64 meta_profile,
1244                                u64 sys_profile)
1245 {
1246         u64 flag = btrfs_disk_block_group_flags(node, bgi);
1247         u64 flag_type = flag & BTRFS_BLOCK_GROUP_TYPE_MASK;
1248         u64 flag_profile = flag & BTRFS_BLOCK_GROUP_PROFILE_MASK;
1249         u64 used = btrfs_disk_block_group_used(node, bgi);
1250
1251         /*
1252          * Chunks meets all the following conditions is a temp chunk
1253          * 1) Empty chunk
1254          * Temp chunk is always empty.
1255          *
1256          * 2) profile mismatch with mkfs profile.
1257          * Temp chunk is always in SINGLE
1258          *
1259          * 3) Size differs with mkfs_alloc
1260          * Special case for SINGLE/SINGLE btrfs.
1261          * In that case, temp data chunk and real data chunk are always empty.
1262          * So we need to use mkfs_alloc to be sure which chunk is the newly
1263          * allocated.
1264          *
1265          * Normally, new chunk size is equal to mkfs one (One chunk)
1266          * If it has multiple chunks, we just refuse to delete any one.
1267          * As they are all single, so no real problem will happen.
1268          * So only use condition 1) and 2) to judge them.
1269          */
1270         if (used != 0)
1271                 return 0;
1272         switch (flag_type) {
1273         case BTRFS_BLOCK_GROUP_DATA:
1274         case BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA:
1275                 data_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
1276                 if (flag_profile != data_profile)
1277                         return 1;
1278                 break;
1279         case BTRFS_BLOCK_GROUP_METADATA:
1280                 meta_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
1281                 if (flag_profile != meta_profile)
1282                         return 1;
1283                 break;
1284         case BTRFS_BLOCK_GROUP_SYSTEM:
1285                 sys_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
1286                 if (flag_profile != sys_profile)
1287                         return 1;
1288                 break;
1289         }
1290         return 0;
1291 }
1292
1293 /* Note: if current is a block group, it will skip it anyway */
1294 static int next_block_group(struct btrfs_root *root,
1295                             struct btrfs_path *path)
1296 {
1297         struct btrfs_key key;
1298         int ret = 0;
1299
1300         while (1) {
1301                 ret = btrfs_next_item(root, path);
1302                 if (ret)
1303                         goto out;
1304
1305                 btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
1306                 if (key.type == BTRFS_BLOCK_GROUP_ITEM_KEY)
1307                         goto out;
1308         }
1309 out:
1310         return ret;
1311 }
1312
1313 /* This function will cleanup  */
1314 static int cleanup_temp_chunks(struct btrfs_fs_info *fs_info,
1315                                struct mkfs_allocation *alloc,
1316                                u64 data_profile, u64 meta_profile,
1317                                u64 sys_profile)
1318 {
1319         struct btrfs_trans_handle *trans = NULL;
1320         struct btrfs_block_group_item *bgi;
1321         struct btrfs_root *root = fs_info->extent_root;
1322         struct btrfs_key key;
1323         struct btrfs_key found_key;
1324         struct btrfs_path path;
1325         int ret = 0;
1326
1327         btrfs_init_path(&path);
1328         trans = btrfs_start_transaction(root, 1);
1329
1330         key.objectid = 0;
1331         key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
1332         key.offset = 0;
1333
1334         while (1) {
1335                 /*
1336                  * as the rest of the loop may modify the tree, we need to
1337                  * start a new search each time.
1338                  */
1339                 ret = btrfs_search_slot(trans, root, &key, &path, 0, 0);
1340                 if (ret < 0)
1341                         goto out;
1342
1343                 btrfs_item_key_to_cpu(path.nodes[0], &found_key,
1344                                       path.slots[0]);
1345                 if (found_key.objectid < key.objectid)
1346                         goto out;
1347                 if (found_key.type != BTRFS_BLOCK_GROUP_ITEM_KEY) {
1348                         ret = next_block_group(root, &path);
1349                         if (ret < 0)
1350                                 goto out;
1351                         if (ret > 0) {
1352                                 ret = 0;
1353                                 goto out;
1354                         }
1355                         btrfs_item_key_to_cpu(path.nodes[0], &found_key,
1356                                               path.slots[0]);
1357                 }
1358
1359                 bgi = btrfs_item_ptr(path.nodes[0], path.slots[0],
1360                                      struct btrfs_block_group_item);
1361                 if (is_temp_block_group(path.nodes[0], bgi,
1362                                         data_profile, meta_profile,
1363                                         sys_profile)) {
1364                         u64 flags = btrfs_disk_block_group_flags(path.nodes[0],
1365                                                              bgi);
1366
1367                         ret = btrfs_free_block_group(trans, fs_info,
1368                                         found_key.objectid, found_key.offset);
1369                         if (ret < 0)
1370                                 goto out;
1371
1372                         if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
1373                             BTRFS_BLOCK_GROUP_DATA)
1374                                 alloc->data -= found_key.offset;
1375                         else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
1376                                  BTRFS_BLOCK_GROUP_METADATA)
1377                                 alloc->metadata -= found_key.offset;
1378                         else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
1379                                  BTRFS_BLOCK_GROUP_SYSTEM)
1380                                 alloc->system -= found_key.offset;
1381                         else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
1382                                  (BTRFS_BLOCK_GROUP_METADATA |
1383                                   BTRFS_BLOCK_GROUP_DATA))
1384                                 alloc->mixed -= found_key.offset;
1385                 }
1386                 btrfs_release_path(&path);
1387                 key.objectid = found_key.objectid + found_key.offset;
1388         }
1389 out:
1390         if (trans)
1391                 btrfs_commit_transaction(trans, root);
1392         btrfs_release_path(&path);
1393         return ret;
1394 }
1395
1396 int main(int argc, char **argv)
1397 {
1398         char *file;
1399         struct btrfs_root *root;
1400         struct btrfs_fs_info *fs_info;
1401         struct btrfs_trans_handle *trans;
1402         char *label = NULL;
1403         u64 block_count = 0;
1404         u64 dev_block_count = 0;
1405         u64 alloc_start = 0;
1406         u64 metadata_profile = 0;
1407         u64 data_profile = 0;
1408         u32 nodesize = max_t(u32, sysconf(_SC_PAGESIZE),
1409                         BTRFS_MKFS_DEFAULT_NODE_SIZE);
1410         u32 sectorsize = 4096;
1411         u32 stripesize = 4096;
1412         int zero_end = 1;
1413         int fd;
1414         int ret;
1415         int i;
1416         int mixed = 0;
1417         int nodesize_forced = 0;
1418         int data_profile_opt = 0;
1419         int metadata_profile_opt = 0;
1420         int discard = 1;
1421         int ssd = 0;
1422         int force_overwrite = 0;
1423         char *source_dir = NULL;
1424         int source_dir_set = 0;
1425         u64 num_of_meta_chunks = 0;
1426         u64 size_of_data = 0;
1427         u64 source_dir_size = 0;
1428         int dev_cnt = 0;
1429         int saved_optind;
1430         char fs_uuid[BTRFS_UUID_UNPARSED_SIZE] = { 0 };
1431         u64 features = BTRFS_MKFS_DEFAULT_FEATURES;
1432         struct mkfs_allocation allocation = { 0 };
1433         struct btrfs_mkfs_config mkfs_cfg;
1434
1435         while(1) {
1436                 int c;
1437                 static const struct option long_options[] = {
1438                         { "alloc-start", required_argument, NULL, 'A'},
1439                         { "byte-count", required_argument, NULL, 'b' },
1440                         { "force", no_argument, NULL, 'f' },
1441                         { "leafsize", required_argument, NULL, 'l' },
1442                         { "label", required_argument, NULL, 'L'},
1443                         { "metadata", required_argument, NULL, 'm' },
1444                         { "mixed", no_argument, NULL, 'M' },
1445                         { "nodesize", required_argument, NULL, 'n' },
1446                         { "sectorsize", required_argument, NULL, 's' },
1447                         { "data", required_argument, NULL, 'd' },
1448                         { "version", no_argument, NULL, 'V' },
1449                         { "rootdir", required_argument, NULL, 'r' },
1450                         { "nodiscard", no_argument, NULL, 'K' },
1451                         { "features", required_argument, NULL, 'O' },
1452                         { "uuid", required_argument, NULL, 'U' },
1453                         { "quiet", 0, NULL, 'q' },
1454                         { "help", no_argument, NULL, GETOPT_VAL_HELP },
1455                         { NULL, 0, NULL, 0}
1456                 };
1457
1458                 c = getopt_long(argc, argv, "A:b:fl:n:s:m:d:L:O:r:U:VMKq",
1459                                 long_options, NULL);
1460                 if (c < 0)
1461                         break;
1462                 switch(c) {
1463                         case 'A':
1464                                 alloc_start = parse_size(optarg);
1465                                 break;
1466                         case 'f':
1467                                 force_overwrite = 1;
1468                                 break;
1469                         case 'd':
1470                                 data_profile = parse_profile(optarg);
1471                                 data_profile_opt = 1;
1472                                 break;
1473                         case 'l':
1474                                 warning("--leafsize is deprecated, use --nodesize");
1475                                 /* fall through */
1476                         case 'n':
1477                                 nodesize = parse_size(optarg);
1478                                 nodesize_forced = 1;
1479                                 break;
1480                         case 'L':
1481                                 label = parse_label(optarg);
1482                                 break;
1483                         case 'm':
1484                                 metadata_profile = parse_profile(optarg);
1485                                 metadata_profile_opt = 1;
1486                                 break;
1487                         case 'M':
1488                                 mixed = 1;
1489                                 break;
1490                         case 'O': {
1491                                 char *orig = strdup(optarg);
1492                                 char *tmp = orig;
1493
1494                                 tmp = btrfs_parse_fs_features(tmp, &features);
1495                                 if (tmp) {
1496                                         error("unrecognized filesystem feature '%s'",
1497                                                         tmp);
1498                                         free(orig);
1499                                         exit(1);
1500                                 }
1501                                 free(orig);
1502                                 if (features & BTRFS_FEATURE_LIST_ALL) {
1503                                         btrfs_list_all_fs_features(0);
1504                                         exit(0);
1505                                 }
1506                                 break;
1507                                 }
1508                         case 's':
1509                                 sectorsize = parse_size(optarg);
1510                                 break;
1511                         case 'b':
1512                                 block_count = parse_size(optarg);
1513                                 zero_end = 0;
1514                                 break;
1515                         case 'V':
1516                                 printf("mkfs.btrfs, part of %s\n",
1517                                                 PACKAGE_STRING);
1518                                 exit(0);
1519                                 break;
1520                         case 'r':
1521                                 source_dir = optarg;
1522                                 source_dir_set = 1;
1523                                 break;
1524                         case 'U':
1525                                 strncpy(fs_uuid, optarg,
1526                                         BTRFS_UUID_UNPARSED_SIZE - 1);
1527                                 break;
1528                         case 'K':
1529                                 discard = 0;
1530                                 break;
1531                         case 'q':
1532                                 verbose = 0;
1533                                 break;
1534                         case GETOPT_VAL_HELP:
1535                         default:
1536                                 print_usage(c != GETOPT_VAL_HELP);
1537                 }
1538         }
1539
1540         if (verbose) {
1541                 printf("%s\n", PACKAGE_STRING);
1542                 printf("See %s for more information.\n\n", PACKAGE_URL);
1543         }
1544
1545         sectorsize = max(sectorsize, (u32)sysconf(_SC_PAGESIZE));
1546         stripesize = sectorsize;
1547         saved_optind = optind;
1548         dev_cnt = argc - optind;
1549         if (dev_cnt == 0)
1550                 print_usage(1);
1551
1552         if (source_dir_set && dev_cnt > 1) {
1553                 error("the option -r is limited to a single device");
1554                 exit(1);
1555         }
1556
1557         if (*fs_uuid) {
1558                 uuid_t dummy_uuid;
1559
1560                 if (uuid_parse(fs_uuid, dummy_uuid) != 0) {
1561                         error("could not parse UUID: %s", fs_uuid);
1562                         exit(1);
1563                 }
1564                 if (!test_uuid_unique(fs_uuid)) {
1565                         error("non-unique UUID: %s", fs_uuid);
1566                         exit(1);
1567                 }
1568         }
1569
1570         while (dev_cnt-- > 0) {
1571                 file = argv[optind++];
1572                 if (is_block_device(file) == 1)
1573                         if (test_dev_for_mkfs(file, force_overwrite))
1574                                 exit(1);
1575         }
1576
1577         optind = saved_optind;
1578         dev_cnt = argc - optind;
1579
1580         file = argv[optind++];
1581         ssd = is_ssd(file);
1582
1583         /*
1584         * Set default profiles according to number of added devices.
1585         * For mixed groups defaults are single/single.
1586         */
1587         if (!mixed) {
1588                 if (!metadata_profile_opt) {
1589                         if (dev_cnt == 1 && ssd && verbose)
1590                                 printf("Detected a SSD, turning off metadata "
1591                                 "duplication.  Mkfs with -m dup if you want to "
1592                                 "force metadata duplication.\n");
1593
1594                         metadata_profile = (dev_cnt > 1) ?
1595                                         BTRFS_BLOCK_GROUP_RAID1 : (ssd) ?
1596                                         0: BTRFS_BLOCK_GROUP_DUP;
1597                 }
1598                 if (!data_profile_opt) {
1599                         data_profile = (dev_cnt > 1) ?
1600                                 BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */
1601                 }
1602         } else {
1603                 u32 best_nodesize = max_t(u32, sysconf(_SC_PAGESIZE), sectorsize);
1604
1605                 if (metadata_profile_opt || data_profile_opt) {
1606                         if (metadata_profile != data_profile) {
1607                                 error(
1608         "with mixed block groups data and metadata profiles must be the same");
1609                                 exit(1);
1610                         }
1611                 }
1612
1613                 if (!nodesize_forced)
1614                         nodesize = best_nodesize;
1615         }
1616
1617         /*
1618          * FS features that can be set by other means than -O
1619          * just set the bit here
1620          */
1621         if (mixed)
1622                 features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
1623
1624         if ((data_profile | metadata_profile) &
1625             (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
1626                 features |= BTRFS_FEATURE_INCOMPAT_RAID56;
1627         }
1628
1629         if (btrfs_check_nodesize(nodesize, sectorsize,
1630                                  features))
1631                 exit(1);
1632
1633         if (sectorsize < sizeof(struct btrfs_super_block)) {
1634                 error("sectorsize smaller than superblock: %u < %zu",
1635                                 sectorsize, sizeof(struct btrfs_super_block));
1636                 exit(1);
1637         }
1638
1639         /* Check device/block_count after the nodesize is determined */
1640         if (block_count && block_count < btrfs_min_dev_size(nodesize)) {
1641                 error("size %llu is too small to make a usable filesystem",
1642                         block_count);
1643                 error("minimum size for btrfs filesystem is %llu",
1644                         btrfs_min_dev_size(nodesize));
1645                 exit(1);
1646         }
1647         for (i = saved_optind; i < saved_optind + dev_cnt; i++) {
1648                 char *path;
1649
1650                 path = argv[i];
1651                 ret = test_minimum_size(path, nodesize);
1652                 if (ret < 0) {
1653                         error("failed to check size for %s: %s",
1654                                 path, strerror(-ret));
1655                         exit (1);
1656                 }
1657                 if (ret > 0) {
1658                         error("'%s' is too small to make a usable filesystem",
1659                                 path);
1660                         error("minimum size for each btrfs device is %llu",
1661                                 btrfs_min_dev_size(nodesize));
1662                         exit(1);
1663                 }
1664         }
1665         ret = test_num_disk_vs_raid(metadata_profile, data_profile,
1666                         dev_cnt, mixed, ssd);
1667         if (ret)
1668                 exit(1);
1669
1670         dev_cnt--;
1671
1672         if (!source_dir_set) {
1673                 /*
1674                  * open without O_EXCL so that the problem should not
1675                  * occur by the following processing.
1676                  * (btrfs_register_one_device() fails if O_EXCL is on)
1677                  */
1678                 fd = open(file, O_RDWR);
1679                 if (fd < 0) {
1680                         error("unable to open %s: %s", file, strerror(errno));
1681                         exit(1);
1682                 }
1683                 ret = btrfs_prepare_device(fd, file, &dev_block_count,
1684                                 block_count,
1685                                 (zero_end ? PREP_DEVICE_ZERO_END : 0) |
1686                                 (discard ? PREP_DEVICE_DISCARD : 0) |
1687                                 (verbose ? PREP_DEVICE_VERBOSE : 0));
1688                 if (ret) {
1689                         close(fd);
1690                         exit(1);
1691                 }
1692                 if (block_count && block_count > dev_block_count) {
1693                         error("%s is smaller than requested size, expected %llu, found %llu",
1694                                         file,
1695                                         (unsigned long long)block_count,
1696                                         (unsigned long long)dev_block_count);
1697                         exit(1);
1698                 }
1699         } else {
1700                 fd = open(file, O_CREAT | O_RDWR,
1701                                 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
1702                 if (fd < 0) {
1703                         error("unable to open %s: %s", file, strerror(errno));
1704                         exit(1);
1705                 }
1706
1707                 source_dir_size = size_sourcedir(source_dir, sectorsize,
1708                                              &num_of_meta_chunks, &size_of_data);
1709                 if(block_count < source_dir_size)
1710                         block_count = source_dir_size;
1711                 ret = zero_output_file(fd, block_count);
1712                 if (ret) {
1713                         error("unable to zero the output file");
1714                         exit(1);
1715                 }
1716                 /* our "device" is the new image file */
1717                 dev_block_count = block_count;
1718         }
1719
1720         /* To create the first block group and chunk 0 in make_btrfs */
1721         if (dev_block_count < BTRFS_MKFS_SYSTEM_GROUP_SIZE) {
1722                 error("device is too small to make filesystem, must be at least %llu",
1723                                 (unsigned long long)BTRFS_MKFS_SYSTEM_GROUP_SIZE);
1724                 exit(1);
1725         }
1726
1727         if (group_profile_max_safe_loss(metadata_profile) <
1728                 group_profile_max_safe_loss(data_profile)){
1729                 warning("metadata has lower redundancy than data!\n");
1730         }
1731
1732         mkfs_cfg.label = label;
1733         memcpy(mkfs_cfg.fs_uuid, fs_uuid, sizeof(mkfs_cfg.fs_uuid));
1734         mkfs_cfg.num_bytes = dev_block_count;
1735         mkfs_cfg.nodesize = nodesize;
1736         mkfs_cfg.sectorsize = sectorsize;
1737         mkfs_cfg.stripesize = stripesize;
1738         mkfs_cfg.features = features;
1739
1740         ret = make_btrfs(fd, &mkfs_cfg);
1741         if (ret) {
1742                 error("error during mkfs: %s", strerror(-ret));
1743                 exit(1);
1744         }
1745
1746         fs_info = open_ctree_fs_info(file, 0, 0, 0,
1747                         OPEN_CTREE_WRITES | OPEN_CTREE_FS_PARTIAL);
1748         if (!fs_info) {
1749                 error("open ctree failed");
1750                 close(fd);
1751                 exit(1);
1752         }
1753         root = fs_info->fs_root;
1754         fs_info->alloc_start = alloc_start;
1755
1756         ret = create_metadata_block_groups(root, mixed, &allocation);
1757         if (ret) {
1758                 error("failed to create default block groups: %d", ret);
1759                 exit(1);
1760         }
1761
1762         trans = btrfs_start_transaction(root, 1);
1763         if (!trans) {
1764                 error("failed to start transaction");
1765                 exit(1);
1766         }
1767
1768         ret = create_data_block_groups(trans, root, mixed, &allocation);
1769         if (ret) {
1770                 error("failed to create default data block groups: %d", ret);
1771                 exit(1);
1772         }
1773
1774         ret = make_root_dir(trans, root);
1775         if (ret) {
1776                 error("failed to setup the root directory: %d", ret);
1777                 exit(1);
1778         }
1779
1780         ret = btrfs_commit_transaction(trans, root);
1781         if (ret) {
1782                 error("unable to commit transaction: %d", ret);
1783                 goto out;
1784         }
1785
1786         trans = btrfs_start_transaction(root, 1);
1787         if (!trans) {
1788                 error("failed to start transaction");
1789                 exit(1);
1790         }
1791
1792         if (dev_cnt == 0)
1793                 goto raid_groups;
1794
1795         while (dev_cnt-- > 0) {
1796                 file = argv[optind++];
1797
1798                 /*
1799                  * open without O_EXCL so that the problem should not
1800                  * occur by the following processing.
1801                  * (btrfs_register_one_device() fails if O_EXCL is on)
1802                  */
1803                 fd = open(file, O_RDWR);
1804                 if (fd < 0) {
1805                         error("unable to open %s: %s", file, strerror(errno));
1806                         exit(1);
1807                 }
1808                 ret = btrfs_device_already_in_root(root, fd,
1809                                                    BTRFS_SUPER_INFO_OFFSET);
1810                 if (ret) {
1811                         error("skipping duplicate device %s in the filesystem",
1812                                 file);
1813                         close(fd);
1814                         continue;
1815                 }
1816                 ret = btrfs_prepare_device(fd, file, &dev_block_count,
1817                                 block_count,
1818                                 (verbose ? PREP_DEVICE_VERBOSE : 0) |
1819                                 (zero_end ? PREP_DEVICE_ZERO_END : 0) |
1820                                 (discard ? PREP_DEVICE_DISCARD : 0));
1821                 if (ret) {
1822                         close(fd);
1823                         exit(1);
1824                 }
1825
1826                 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
1827                                         sectorsize, sectorsize, sectorsize);
1828                 if (ret) {
1829                         error("unable to add %s to filesystem: %d", file, ret);
1830                         goto out;
1831                 }
1832                 if (verbose >= 2) {
1833                         struct btrfs_device *device;
1834
1835                         device = container_of(fs_info->fs_devices->devices.next,
1836                                         struct btrfs_device, dev_list);
1837                         printf("adding device %s id %llu\n", file,
1838                                 (unsigned long long)device->devid);
1839                 }
1840         }
1841
1842 raid_groups:
1843         if (!source_dir_set) {
1844                 ret = create_raid_groups(trans, root, data_profile,
1845                                  metadata_profile, mixed, &allocation);
1846                 if (ret) {
1847                         error("unable to create raid groups: %d", ret);
1848                         goto out;
1849                 }
1850         }
1851
1852         ret = create_data_reloc_tree(trans, root);
1853         if (ret) {
1854                 error("unable to create data reloc tree: %d", ret);
1855                 goto out;
1856         }
1857
1858         ret = btrfs_commit_transaction(trans, root);
1859         if (ret) {
1860                 error("unable to commit transaction: %d", ret);
1861                 goto out;
1862         }
1863
1864         if (source_dir_set) {
1865                 trans = btrfs_start_transaction(root, 1);
1866                 ret = create_chunks(trans, root,
1867                                     num_of_meta_chunks, size_of_data,
1868                                     &allocation);
1869                 if (ret) {
1870                         error("unable to create chunks: %d", ret);
1871                         goto out;
1872                 }
1873                 ret = btrfs_commit_transaction(trans, root);
1874                 if (ret) {
1875                         error("transaction commit failed: %d", ret);
1876                         goto out;
1877                 }
1878
1879                 ret = make_image(source_dir, root, fd);
1880                 if (ret) {
1881                         error("error wihle filling filesystem: %d", ret);
1882                         goto out;
1883                 }
1884         }
1885         ret = cleanup_temp_chunks(fs_info, &allocation, data_profile,
1886                                   metadata_profile, metadata_profile);
1887         if (ret < 0) {
1888                 error("failed to cleanup temporary chunks: %d", ret);
1889                 goto out;
1890         }
1891
1892         if (verbose) {
1893                 char features_buf[64];
1894
1895                 printf("Label:              %s\n", label);
1896                 printf("UUID:               %s\n", mkfs_cfg.fs_uuid);
1897                 printf("Node size:          %u\n", nodesize);
1898                 printf("Sector size:        %u\n", sectorsize);
1899                 printf("Filesystem size:    %s\n",
1900                         pretty_size(btrfs_super_total_bytes(fs_info->super_copy)));
1901                 printf("Block group profiles:\n");
1902                 if (allocation.data)
1903                         printf("  Data:             %-8s %16s\n",
1904                                 btrfs_group_profile_str(data_profile),
1905                                 pretty_size(allocation.data));
1906                 if (allocation.metadata)
1907                         printf("  Metadata:         %-8s %16s\n",
1908                                 btrfs_group_profile_str(metadata_profile),
1909                                 pretty_size(allocation.metadata));
1910                 if (allocation.mixed)
1911                         printf("  Data+Metadata:    %-8s %16s\n",
1912                                 btrfs_group_profile_str(data_profile),
1913                                 pretty_size(allocation.mixed));
1914                 printf("  System:           %-8s %16s\n",
1915                         btrfs_group_profile_str(metadata_profile),
1916                         pretty_size(allocation.system));
1917                 printf("SSD detected:       %s\n", ssd ? "yes" : "no");
1918                 btrfs_parse_features_to_string(features_buf, features);
1919                 printf("Incompat features:  %s", features_buf);
1920                 printf("\n");
1921
1922                 list_all_devices(root);
1923         }
1924
1925         /*
1926          * The filesystem is now fully set up, commit the remaining changes and
1927          * fix the signature as the last step before closing the devices.
1928          */
1929         fs_info->finalize_on_close = 1;
1930 out:
1931         ret = close_ctree(root);
1932
1933         if (!ret) {
1934                 optind = saved_optind;
1935                 dev_cnt = argc - optind;
1936                 while (dev_cnt-- > 0) {
1937                         file = argv[optind++];
1938                         if (is_block_device(file) == 1)
1939                                 btrfs_register_one_device(file);
1940                 }
1941         }
1942
1943         btrfs_close_all_devices();
1944         free(label);
1945
1946         return !!ret;
1947 }