mkfs.c

   1 /*
   2  * Copyright (C) 2007 Oracle.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public
   6  * License v2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public
  14  * License along with this program; if not, write to the
  15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  16  * Boston, MA 021110-1307, USA.
  17  */
  18
  19 #define _XOPEN_SOURCE 500
  20 #define _GNU_SOURCE
  21
  22 #include "kerncompat.h"
  23
  24 #include <sys/ioctl.h>
  25 #include <sys/mount.h>
  26 #include "ioctl.h"
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <sys/types.h>
  30 #include <sys/stat.h>
  31 #include <sys/dir.h>
  32 #include <fcntl.h>
  33 #include <unistd.h>
  34 #include <getopt.h>
  35 #include <uuid/uuid.h>
  36 #include <ctype.h>
  37 #include <sys/xattr.h>
  38 #include <limits.h>
  39 #include <linux/limits.h>
  40 #include <blkid/blkid.h>
  41 #include <ftw.h>
  42 #include "ctree.h"
  43 #include "disk-io.h"
  44 #include "volumes.h"
  45 #include "transaction.h"
  46 #include "utils.h"
  47 #include "version.h"
  48
  49 static u64 index_cnt = 2;
  50
  51 #define DEFAULT_MKFS_FEATURES   (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF \
  52                 | BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
  53
  54 #define DEFAULT_MKFS_LEAF_SIZE 16384
  55
  56 struct directory_name_entry {
  57         char *dir_name;
  58         char *path;
  59         ino_t inum;
  60         struct list_head list;
  61 };
  62
  63 static int make_root_dir(struct btrfs_root *root, int mixed)
  64 {
  65         struct btrfs_trans_handle *trans;
  66         struct btrfs_key location;
  67         u64 bytes_used;
  68         u64 chunk_start = 0;
  69         u64 chunk_size = 0;
  70         int ret;
  71
  72         trans = btrfs_start_transaction(root, 1);
  73         bytes_used = btrfs_super_bytes_used(root->fs_info->super_copy);
  74
  75         root->fs_info->system_allocs = 1;
  76         ret = btrfs_make_block_group(trans, root, bytes_used,
  77                                      BTRFS_BLOCK_GROUP_SYSTEM,
  78                                      BTRFS_FIRST_CHUNK_TREE_OBJECTID,
  79                                      0, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
  80         BUG_ON(ret);
  81
  82         if (mixed) {
  83                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
  84                                         &chunk_start, &chunk_size,
  85                                         BTRFS_BLOCK_GROUP_METADATA |
  86                                         BTRFS_BLOCK_GROUP_DATA);
  87                 if (ret == -ENOSPC) {
  88                         fprintf(stderr,
  89                                 "no space to alloc data/metadata chunk\n");
  90                         goto err;
  91                 }
  92                 BUG_ON(ret);
  93                 ret = btrfs_make_block_group(trans, root, 0,
  94                                              BTRFS_BLOCK_GROUP_METADATA |
  95                                              BTRFS_BLOCK_GROUP_DATA,
  96                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
  97                                              chunk_start, chunk_size);
  98                 BUG_ON(ret);
  99                 printf("Created a data/metadata chunk of size %llu\n", chunk_size);
 100         } else {
 101                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 102                                         &chunk_start, &chunk_size,
 103                                         BTRFS_BLOCK_GROUP_METADATA);
 104                 if (ret == -ENOSPC) {
 105                         fprintf(stderr, "no space to alloc metadata chunk\n");
 106                         goto err;
 107                 }
 108                 BUG_ON(ret);
 109                 ret = btrfs_make_block_group(trans, root, 0,
 110                                              BTRFS_BLOCK_GROUP_METADATA,
 111                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 112                                              chunk_start, chunk_size);
 113                 BUG_ON(ret);
 114         }
 115
 116         root->fs_info->system_allocs = 0;
 117         btrfs_commit_transaction(trans, root);
 118         trans = btrfs_start_transaction(root, 1);
 119         BUG_ON(!trans);
 120
 121         if (!mixed) {
 122                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 123                                         &chunk_start, &chunk_size,
 124                                         BTRFS_BLOCK_GROUP_DATA);
 125                 if (ret == -ENOSPC) {
 126                         fprintf(stderr, "no space to alloc data chunk\n");
 127                         goto err;
 128                 }
 129                 BUG_ON(ret);
 130                 ret = btrfs_make_block_group(trans, root, 0,
 131                                              BTRFS_BLOCK_GROUP_DATA,
 132                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 133                                              chunk_start, chunk_size);
 134                 BUG_ON(ret);
 135         }
 136
 137         ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
 138                               BTRFS_ROOT_TREE_DIR_OBJECTID);
 139         if (ret)
 140                 goto err;
 141         ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
 142         if (ret)
 143                 goto err;
 144         memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
 145         location.offset = (u64)-1;
 146         ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
 147                         "default", 7,
 148                         btrfs_super_root_dir(root->fs_info->super_copy),
 149                         &location, BTRFS_FT_DIR, 0);
 150         if (ret)
 151                 goto err;
 152
 153         ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
 154                              "default", 7, location.objectid,
 155                              BTRFS_ROOT_TREE_DIR_OBJECTID, 0);
 156         if (ret)
 157                 goto err;
 158
 159         btrfs_commit_transaction(trans, root);
 160 err:
 161         return ret;
 162 }
 163
 164 static void __recow_root(struct btrfs_trans_handle *trans,
 165                          struct btrfs_root *root)
 166 {
 167         int ret;
 168         struct extent_buffer *tmp;
 169
 170         if (trans->transid != btrfs_root_generation(&root->root_item)) {
 171                 extent_buffer_get(root->node);
 172                 ret = __btrfs_cow_block(trans, root, root->node,
 173                                         NULL, 0, &tmp, 0, 0);
 174                 BUG_ON(ret);
 175                 free_extent_buffer(tmp);
 176         }
 177 }
 178
 179 static void recow_roots(struct btrfs_trans_handle *trans,
 180                        struct btrfs_root *root)
 181 {
 182         struct btrfs_fs_info *info = root->fs_info;
 183
 184         __recow_root(trans, info->fs_root);
 185         __recow_root(trans, info->tree_root);
 186         __recow_root(trans, info->extent_root);
 187         __recow_root(trans, info->chunk_root);
 188         __recow_root(trans, info->dev_root);
 189         __recow_root(trans, info->csum_root);
 190 }
 191
 192 static int create_one_raid_group(struct btrfs_trans_handle *trans,
 193                               struct btrfs_root *root, u64 type)
 194 {
 195         u64 chunk_start;
 196         u64 chunk_size;
 197         int ret;
 198
 199         ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 200                                 &chunk_start, &chunk_size, type);
 201         if (ret == -ENOSPC) {
 202                 fprintf(stderr, "not enough free space\n");
 203                 exit(1);
 204         }
 205         BUG_ON(ret);
 206         ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
 207                                      type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 208                                      chunk_start, chunk_size);
 209         BUG_ON(ret);
 210         return ret;
 211 }
 212
 213 static int create_raid_groups(struct btrfs_trans_handle *trans,
 214                               struct btrfs_root *root, u64 data_profile,
 215                               int data_profile_opt, u64 metadata_profile,
 216                               int mixed)
 217 {
 218         u64 num_devices = btrfs_super_num_devices(root->fs_info->super_copy);
 219         int ret;
 220
 221         if (metadata_profile) {
 222                 u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA;
 223
 224                 ret = create_one_raid_group(trans, root,
 225                                             BTRFS_BLOCK_GROUP_SYSTEM |
 226                                             metadata_profile);
 227                 BUG_ON(ret);
 228
 229                 if (mixed)
 230                         meta_flags |= BTRFS_BLOCK_GROUP_DATA;
 231
 232                 ret = create_one_raid_group(trans, root, meta_flags |
 233                                             metadata_profile);
 234                 BUG_ON(ret);
 235
 236         }
 237         if (!mixed && num_devices > 1 && data_profile) {
 238                 ret = create_one_raid_group(trans, root,
 239                                             BTRFS_BLOCK_GROUP_DATA |
 240                                             data_profile);
 241                 BUG_ON(ret);
 242         }
 243         recow_roots(trans, root);
 244
 245         return 0;
 246 }
 247
 248 static int create_data_reloc_tree(struct btrfs_trans_handle *trans,
 249                                   struct btrfs_root *root)
 250 {
 251         struct btrfs_key location;
 252         struct btrfs_root_item root_item;
 253         struct extent_buffer *tmp;
 254         u64 objectid = BTRFS_DATA_RELOC_TREE_OBJECTID;
 255         int ret;
 256
 257         ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
 258         BUG_ON(ret);
 259
 260         memcpy(&root_item, &root->root_item, sizeof(root_item));
 261         btrfs_set_root_bytenr(&root_item, tmp->start);
 262         btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
 263         btrfs_set_root_generation(&root_item, trans->transid);
 264         free_extent_buffer(tmp);
 265
 266         location.objectid = objectid;
 267         location.type = BTRFS_ROOT_ITEM_KEY;
 268         location.offset = 0;
 269         ret = btrfs_insert_root(trans, root->fs_info->tree_root,
 270                                 &location, &root_item);
 271         BUG_ON(ret);
 272         return 0;
 273 }
 274
 275
 276 static void print_usage(void) __attribute__((noreturn));
 277 static void print_usage(void)
 278 {
 279         fprintf(stderr, "usage: mkfs.btrfs [options] dev [ dev ... ]\n");
 280         fprintf(stderr, "options:\n");
 281         fprintf(stderr, "\t -A --alloc-start the offset to start the FS\n");
 282         fprintf(stderr, "\t -b --byte-count total number of bytes in the FS\n");
 283         fprintf(stderr, "\t -d --data data profile, raid0, raid1, raid5, raid6, raid10, dup or single\n");
 284         fprintf(stderr, "\t -f --force force overwrite of existing filesystem\n");
 285         fprintf(stderr, "\t -l --leafsize size of btree leaves\n");
 286         fprintf(stderr, "\t -L --label set a label\n");
 287         fprintf(stderr, "\t -m --metadata metadata profile, values like data profile\n");
 288         fprintf(stderr, "\t -M --mixed mix metadata and data together\n");
 289         fprintf(stderr, "\t -n --nodesize size of btree nodes\n");
 290         fprintf(stderr, "\t -s --sectorsize min block allocation (may not mountable by current kernel)\n");
 291         fprintf(stderr, "\t -r --rootdir the source directory\n");
 292         fprintf(stderr, "\t -K --nodiscard do not perform whole device TRIM\n");
 293         fprintf(stderr, "\t -O --features comma separated list of filesystem features\n");
 294         fprintf(stderr, "\t -U --uuid specify the filesystem UUID\n");
 295         fprintf(stderr, "\t -V --version print the mkfs.btrfs version and exit\n");
 296         fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
 297         exit(1);
 298 }
 299
 300 static void print_version(void) __attribute__((noreturn));
 301 static void print_version(void)
 302 {
 303         fprintf(stderr, "mkfs.btrfs, part of %s\n", BTRFS_BUILD_VERSION);
 304         exit(0);
 305 }
 306
 307 static u64 parse_profile(char *s)
 308 {
 309         if (strcmp(s, "raid0") == 0) {
 310                 return BTRFS_BLOCK_GROUP_RAID0;
 311         } else if (strcmp(s, "raid1") == 0) {
 312                 return BTRFS_BLOCK_GROUP_RAID1;
 313         } else if (strcmp(s, "raid5") == 0) {
 314                 return BTRFS_BLOCK_GROUP_RAID5;
 315         } else if (strcmp(s, "raid6") == 0) {
 316                 return BTRFS_BLOCK_GROUP_RAID6;
 317         } else if (strcmp(s, "raid10") == 0) {
 318                 return BTRFS_BLOCK_GROUP_RAID10;
 319         } else if (strcmp(s, "dup") == 0) {
 320                 return BTRFS_BLOCK_GROUP_DUP;
 321         } else if (strcmp(s, "single") == 0) {
 322                 return 0;
 323         } else {
 324                 fprintf(stderr, "Unknown profile %s\n", s);
 325                 print_usage();
 326         }
 327         /* not reached */
 328         return 0;
 329 }
 330
 331 static char *parse_label(char *input)
 332 {
 333         int len = strlen(input);
 334
 335         if (len >= BTRFS_LABEL_SIZE) {
 336                 fprintf(stderr, "Label %s is too long (max %d)\n", input,
 337                         BTRFS_LABEL_SIZE - 1);
 338                 exit(1);
 339         }
 340         return strdup(input);
 341 }
 342
 343 static struct option long_options[] = {
 344         { "alloc-start", 1, NULL, 'A'},
 345         { "byte-count", 1, NULL, 'b' },
 346         { "force", 0, NULL, 'f' },
 347         { "leafsize", 1, NULL, 'l' },
 348         { "label", 1, NULL, 'L'},
 349         { "metadata", 1, NULL, 'm' },
 350         { "mixed", 0, NULL, 'M' },
 351         { "nodesize", 1, NULL, 'n' },
 352         { "sectorsize", 1, NULL, 's' },
 353         { "data", 1, NULL, 'd' },
 354         { "version", 0, NULL, 'V' },
 355         { "rootdir", 1, NULL, 'r' },
 356         { "nodiscard", 0, NULL, 'K' },
 357         { "features", 1, NULL, 'O' },
 358         { "uuid", required_argument, NULL, 'U' },
 359         { NULL, 0, NULL, 0}
 360 };
 361
 362 static int add_directory_items(struct btrfs_trans_handle *trans,
 363                                struct btrfs_root *root, u64 objectid,
 364                                ino_t parent_inum, const char *name,
 365                                struct stat *st, int *dir_index_cnt)
 366 {
 367         int ret;
 368         int name_len;
 369         struct btrfs_key location;
 370         u8 filetype = 0;
 371
 372         name_len = strlen(name);
 373
 374         location.objectid = objectid;
 375         location.offset = 0;
 376         btrfs_set_key_type(&location, BTRFS_INODE_ITEM_KEY);
 377
 378         if (S_ISDIR(st->st_mode))
 379                 filetype = BTRFS_FT_DIR;
 380         if (S_ISREG(st->st_mode))
 381                 filetype = BTRFS_FT_REG_FILE;
 382         if (S_ISLNK(st->st_mode))
 383                 filetype = BTRFS_FT_SYMLINK;
 384
 385         ret = btrfs_insert_dir_item(trans, root, name, name_len,
 386                                     parent_inum, &location,
 387                                     filetype, index_cnt);
 388         if (ret)
 389                 return ret;
 390         ret = btrfs_insert_inode_ref(trans, root, name, name_len,
 391                                      objectid, parent_inum, index_cnt);
 392         *dir_index_cnt = index_cnt;
 393         index_cnt++;
 394
 395         return ret;
 396 }
 397
 398 static int fill_inode_item(struct btrfs_trans_handle *trans,
 399                            struct btrfs_root *root,
 400                            struct btrfs_inode_item *dst, struct stat *src)
 401 {
 402         u64 blocks = 0;
 403         u64 sectorsize = root->sectorsize;
 404
 405         /*
 406          * btrfs_inode_item has some reserved fields
 407          * and represents on-disk inode entry, so
 408          * zero everything to prevent information leak
 409          */
 410         memset(dst, 0, sizeof (*dst));
 411
 412         btrfs_set_stack_inode_generation(dst, trans->transid);
 413         btrfs_set_stack_inode_size(dst, src->st_size);
 414         btrfs_set_stack_inode_nbytes(dst, 0);
 415         btrfs_set_stack_inode_block_group(dst, 0);
 416         btrfs_set_stack_inode_nlink(dst, src->st_nlink);
 417         btrfs_set_stack_inode_uid(dst, src->st_uid);
 418         btrfs_set_stack_inode_gid(dst, src->st_gid);
 419         btrfs_set_stack_inode_mode(dst, src->st_mode);
 420         btrfs_set_stack_inode_rdev(dst, 0);
 421         btrfs_set_stack_inode_flags(dst, 0);
 422         btrfs_set_stack_timespec_sec(&dst->atime, src->st_atime);
 423         btrfs_set_stack_timespec_nsec(&dst->atime, 0);
 424         btrfs_set_stack_timespec_sec(&dst->ctime, src->st_ctime);
 425         btrfs_set_stack_timespec_nsec(&dst->ctime, 0);
 426         btrfs_set_stack_timespec_sec(&dst->mtime, src->st_mtime);
 427         btrfs_set_stack_timespec_nsec(&dst->mtime, 0);
 428         btrfs_set_stack_timespec_sec(&dst->otime, 0);
 429         btrfs_set_stack_timespec_nsec(&dst->otime, 0);
 430
 431         if (S_ISDIR(src->st_mode)) {
 432                 btrfs_set_stack_inode_size(dst, 0);
 433                 btrfs_set_stack_inode_nlink(dst, 1);
 434         }
 435         if (S_ISREG(src->st_mode)) {
 436                 btrfs_set_stack_inode_size(dst, (u64)src->st_size);
 437                 if (src->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root))
 438                         btrfs_set_stack_inode_nbytes(dst, src->st_size);
 439                 else {
 440                         blocks = src->st_size / sectorsize;
 441                         if (src->st_size % sectorsize)
 442                                 blocks += 1;
 443                         blocks *= sectorsize;
 444                         btrfs_set_stack_inode_nbytes(dst, blocks);
 445                 }
 446         }
 447         if (S_ISLNK(src->st_mode))
 448                 btrfs_set_stack_inode_nbytes(dst, src->st_size + 1);
 449
 450         return 0;
 451 }
 452
 453 static int directory_select(const struct direct *entry)
 454 {
 455         if ((strncmp(entry->d_name, ".", entry->d_reclen) == 0) ||
 456                 (strncmp(entry->d_name, "..", entry->d_reclen) == 0))
 457                 return 0;
 458         else
 459                 return 1;
 460 }
 461
 462 static void free_namelist(struct direct **files, int count)
 463 {
 464         int i;
 465
 466         if (count < 0)
 467                 return;
 468
 469         for (i = 0; i < count; ++i)
 470                 free(files[i]);
 471         free(files);
 472 }
 473
 474 static u64 calculate_dir_inode_size(char *dirname)
 475 {
 476         int count, i;
 477         struct direct **files, *cur_file;
 478         u64 dir_inode_size = 0;
 479
 480         count = scandir(dirname, &files, directory_select, NULL);
 481
 482         for (i = 0; i < count; i++) {
 483                 cur_file = files[i];
 484                 dir_inode_size += strlen(cur_file->d_name);
 485         }
 486
 487         free_namelist(files, count);
 488
 489         dir_inode_size *= 2;
 490         return dir_inode_size;
 491 }
 492
 493 static int add_inode_items(struct btrfs_trans_handle *trans,
 494                            struct btrfs_root *root,
 495                            struct stat *st, char *name,
 496                            u64 self_objectid, ino_t parent_inum,
 497                            int dir_index_cnt, struct btrfs_inode_item *inode_ret)
 498 {
 499         int ret;
 500         struct btrfs_key inode_key;
 501         struct btrfs_inode_item btrfs_inode;
 502         u64 objectid;
 503         u64 inode_size = 0;
 504
 505         fill_inode_item(trans, root, &btrfs_inode, st);
 506         objectid = self_objectid;
 507
 508         if (S_ISDIR(st->st_mode)) {
 509                 inode_size = calculate_dir_inode_size(name);
 510                 btrfs_set_stack_inode_size(&btrfs_inode, inode_size);
 511         }
 512
 513         inode_key.objectid = objectid;
 514         inode_key.offset = 0;
 515         btrfs_set_key_type(&inode_key, BTRFS_INODE_ITEM_KEY);
 516
 517         ret = btrfs_insert_inode(trans, root, objectid, &btrfs_inode);
 518
 519         *inode_ret = btrfs_inode;
 520         return ret;
 521 }
 522
 523 static int add_xattr_item(struct btrfs_trans_handle *trans,
 524                           struct btrfs_root *root, u64 objectid,
 525                           const char *file_name)
 526 {
 527         int ret;
 528         int cur_name_len;
 529         char xattr_list[XATTR_LIST_MAX];
 530         char *cur_name;
 531         char cur_value[XATTR_SIZE_MAX];
 532         char delimiter = '\0';
 533         char *next_location = xattr_list;
 534
 535         ret = llistxattr(file_name, xattr_list, XATTR_LIST_MAX);
 536         if (ret < 0) {
 537                 if(errno == ENOTSUP)
 538                         return 0;
 539                 fprintf(stderr, "get a list of xattr failed for %s\n",
 540                         file_name);
 541                 return ret;
 542         }
 543         if (ret == 0)
 544                 return ret;
 545
 546         cur_name = strtok(xattr_list, &delimiter);
 547         while (cur_name != NULL) {
 548                 cur_name_len = strlen(cur_name);
 549                 next_location += cur_name_len + 1;
 550
 551                 ret = getxattr(file_name, cur_name, cur_value, XATTR_SIZE_MAX);
 552                 if (ret < 0) {
 553                         if(errno == ENOTSUP)
 554                                 return 0;
 555                         fprintf(stderr, "get a xattr value failed for %s attr %s\n",
 556                                 file_name, cur_name);
 557                         return ret;
 558                 }
 559
 560                 ret = btrfs_insert_xattr_item(trans, root, cur_name,
 561                                               cur_name_len, cur_value,
 562                                               ret, objectid);
 563                 if (ret) {
 564                         fprintf(stderr, "insert a xattr item failed for %s\n",
 565                                 file_name);
 566                 }
 567
 568                 cur_name = strtok(next_location, &delimiter);
 569         }
 570
 571         return ret;
 572 }
 573
 574 static int add_symbolic_link(struct btrfs_trans_handle *trans,
 575                              struct btrfs_root *root,
 576                              u64 objectid, const char *path_name)
 577 {
 578         int ret;
 579         u64 sectorsize = root->sectorsize;
 580         char *buf = malloc(sectorsize);
 581
 582         ret = readlink(path_name, buf, sectorsize);
 583         if (ret <= 0) {
 584                 fprintf(stderr, "readlink failed for %s\n", path_name);
 585                 goto fail;
 586         }
 587         if (ret >= sectorsize) {
 588                 fprintf(stderr, "symlink too long for %s", path_name);
 589                 ret = -1;
 590                 goto fail;
 591         }
 592
 593         buf[ret] = '\0'; /* readlink does not do it for us */
 594         ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
 595                                          buf, ret + 1);
 596 fail:
 597         free(buf);
 598         return ret;
 599 }
 600
 601 static int add_file_items(struct btrfs_trans_handle *trans,
 602                           struct btrfs_root *root,
 603                           struct btrfs_inode_item *btrfs_inode, u64 objectid,
 604                           ino_t parent_inum, struct stat *st,
 605                           const char *path_name, int out_fd)
 606 {
 607         int ret = -1;
 608         ssize_t ret_read;
 609         u64 bytes_read = 0;
 610         struct btrfs_key key;
 611         int blocks;
 612         u32 sectorsize = root->sectorsize;
 613         u64 first_block = 0;
 614         u64 file_pos = 0;
 615         u64 cur_bytes;
 616         u64 total_bytes;
 617         struct extent_buffer *eb = NULL;
 618         int fd;
 619
 620         if (st->st_size == 0)
 621                 return 0;
 622
 623         fd = open(path_name, O_RDONLY);
 624         if (fd == -1) {
 625                 fprintf(stderr, "%s open failed\n", path_name);
 626                 return ret;
 627         }
 628
 629         blocks = st->st_size / sectorsize;
 630         if (st->st_size % sectorsize)
 631                 blocks += 1;
 632
 633         if (st->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root)) {
 634                 char *buffer = malloc(st->st_size);
 635                 ret_read = pread64(fd, buffer, st->st_size, bytes_read);
 636                 if (ret_read == -1) {
 637                         fprintf(stderr, "%s read failed\n", path_name);
 638                         free(buffer);
 639                         goto end;
 640                 }
 641
 642                 ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
 643                                                  buffer, st->st_size);
 644                 free(buffer);
 645                 goto end;
 646         }
 647
 648         /* round up our st_size to the FS blocksize */
 649         total_bytes = (u64)blocks * sectorsize;
 650
 651         /*
 652          * do our IO in extent buffers so it can work
 653          * against any raid type
 654          */
 655         eb = malloc(sizeof(*eb) + sectorsize);
 656         if (!eb) {
 657                 ret = -ENOMEM;
 658                 goto end;
 659         }
 660         memset(eb, 0, sizeof(*eb) + sectorsize);
 661
 662 again:
 663
 664         /*
 665          * keep our extent size at 1MB max, this makes it easier to work inside
 666          * the tiny block groups created during mkfs
 667          */
 668         cur_bytes = min(total_bytes, 1024ULL * 1024);
 669         ret = btrfs_reserve_extent(trans, root, cur_bytes, 0, 0, (u64)-1,
 670                                    &key, 1);
 671         if (ret)
 672                 goto end;
 673
 674         first_block = key.objectid;
 675         bytes_read = 0;
 676
 677         while (bytes_read < cur_bytes) {
 678
 679                 memset(eb->data, 0, sectorsize);
 680
 681                 ret_read = pread64(fd, eb->data, sectorsize, file_pos + bytes_read);
 682                 if (ret_read == -1) {
 683                         fprintf(stderr, "%s read failed\n", path_name);
 684                         goto end;
 685                 }
 686
 687                 eb->start = first_block + bytes_read;
 688                 eb->len = sectorsize;
 689
 690                 /*
 691                  * we're doing the csum before we record the extent, but
 692                  * that's ok
 693                  */
 694                 ret = btrfs_csum_file_block(trans, root->fs_info->csum_root,
 695                                             first_block + bytes_read + sectorsize,
 696                                             first_block + bytes_read,
 697                                             eb->data, sectorsize);
 698                 if (ret)
 699                         goto end;
 700
 701                 ret = write_and_map_eb(trans, root, eb);
 702                 if (ret) {
 703                         fprintf(stderr, "output file write failed\n");
 704                         goto end;
 705                 }
 706
 707                 bytes_read += sectorsize;
 708         }
 709
 710         if (bytes_read) {
 711                 ret = btrfs_record_file_extent(trans, root, objectid, btrfs_inode,
 712                                                file_pos, first_block, cur_bytes);
 713                 if (ret)
 714                         goto end;
 715
 716         }
 717
 718         file_pos += cur_bytes;
 719         total_bytes -= cur_bytes;
 720
 721         if (total_bytes)
 722                 goto again;
 723
 724 end:
 725         free(eb);
 726         close(fd);
 727         return ret;
 728 }
 729
 730 static char *make_path(char *dir, char *name)
 731 {
 732         char *path;
 733
 734         path = malloc(strlen(dir) + strlen(name) + 2);
 735         if (!path)
 736                 return NULL;
 737         strcpy(path, dir);
 738         if (dir[strlen(dir) - 1] != '/')
 739                 strcat(path, "/");
 740         strcat(path, name);
 741         return path;
 742 }
 743
 744 static int traverse_directory(struct btrfs_trans_handle *trans,
 745                               struct btrfs_root *root, char *dir_name,
 746                               struct directory_name_entry *dir_head, int out_fd)
 747 {
 748         int ret = 0;
 749
 750         struct btrfs_inode_item cur_inode;
 751         struct btrfs_inode_item *inode_item;
 752         int count, i, dir_index_cnt;
 753         struct direct **files;
 754         struct stat st;
 755         struct directory_name_entry *dir_entry, *parent_dir_entry;
 756         struct direct *cur_file;
 757         ino_t parent_inum, cur_inum;
 758         ino_t highest_inum = 0;
 759         char *parent_dir_name;
 760         char real_path[PATH_MAX];
 761         struct btrfs_path path;
 762         struct extent_buffer *leaf;
 763         struct btrfs_key root_dir_key;
 764         u64 root_dir_inode_size = 0;
 765
 766         /* Add list for source directory */
 767         dir_entry = malloc(sizeof(struct directory_name_entry));
 768         dir_entry->dir_name = dir_name;
 769         dir_entry->path = realpath(dir_name, real_path);
 770         if (!dir_entry->path) {
 771                 fprintf(stderr, "get directory real path error\n");
 772                 ret = -1;
 773                 goto fail_no_dir;
 774         }
 775
 776         parent_inum = highest_inum + BTRFS_FIRST_FREE_OBJECTID;
 777         dir_entry->inum = parent_inum;
 778         list_add_tail(&dir_entry->list, &dir_head->list);
 779
 780         btrfs_init_path(&path);
 781
 782         root_dir_key.objectid = btrfs_root_dirid(&root->root_item);
 783         root_dir_key.offset = 0;
 784         btrfs_set_key_type(&root_dir_key, BTRFS_INODE_ITEM_KEY);
 785         ret = btrfs_lookup_inode(trans, root, &path, &root_dir_key, 1);
 786         if (ret) {
 787                 fprintf(stderr, "root dir lookup error\n");
 788                 goto fail_no_dir;
 789         }
 790
 791         leaf = path.nodes[0];
 792         inode_item = btrfs_item_ptr(leaf, path.slots[0],
 793                                     struct btrfs_inode_item);
 794
 795         root_dir_inode_size = calculate_dir_inode_size(dir_name);
 796         btrfs_set_inode_size(leaf, inode_item, root_dir_inode_size);
 797         btrfs_mark_buffer_dirty(leaf);
 798
 799         btrfs_release_path(&path);
 800
 801         do {
 802                 parent_dir_entry = list_entry(dir_head->list.next,
 803                                               struct directory_name_entry,
 804                                               list);
 805                 list_del(&parent_dir_entry->list);
 806
 807                 parent_inum = parent_dir_entry->inum;
 808                 parent_dir_name = parent_dir_entry->dir_name;
 809                 if (chdir(parent_dir_entry->path)) {
 810                         fprintf(stderr, "chdir error for %s\n",
 811                                 parent_dir_name);
 812                         ret = -1;
 813                         goto fail_no_files;
 814                 }
 815
 816                 count = scandir(parent_dir_entry->path, &files,
 817                                 directory_select, NULL);
 818                 if (count == -1)
 819                 {
 820                         fprintf(stderr, "scandir for %s failed: %s\n",
 821                                 parent_dir_name, strerror (errno));
 822                         ret = -1;
 823                         goto fail;
 824                 }
 825
 826                 for (i = 0; i < count; i++) {
 827                         cur_file = files[i];
 828
 829                         if (lstat(cur_file->d_name, &st) == -1) {
 830                                 fprintf(stderr, "lstat failed for file %s\n",
 831                                         cur_file->d_name);
 832                                 ret = -1;
 833                                 goto fail;
 834                         }
 835
 836                         cur_inum = st.st_ino;
 837                         ret = add_directory_items(trans, root,
 838                                                   cur_inum, parent_inum,
 839                                                   cur_file->d_name,
 840                                                   &st, &dir_index_cnt);
 841                         if (ret) {
 842                                 fprintf(stderr, "add_directory_items failed\n");
 843                                 goto fail;
 844                         }
 845
 846                         ret = add_inode_items(trans, root, &st,
 847                                               cur_file->d_name, cur_inum,
 848                                               parent_inum, dir_index_cnt,
 849                                               &cur_inode);
 850                         if (ret == -EEXIST) {
 851                                 BUG_ON(st.st_nlink <= 1);
 852                                 continue;
 853                         }
 854                         if (ret) {
 855                                 fprintf(stderr, "add_inode_items failed\n");
 856                                 goto fail;
 857                         }
 858
 859                         ret = add_xattr_item(trans, root,
 860                                              cur_inum, cur_file->d_name);
 861                         if (ret) {
 862                                 fprintf(stderr, "add_xattr_item failed\n");
 863                                 if(ret != -ENOTSUP)
 864                                         goto fail;
 865                         }
 866
 867                         if (S_ISDIR(st.st_mode)) {
 868                                 dir_entry = malloc(sizeof(struct directory_name_entry));
 869                                 dir_entry->dir_name = cur_file->d_name;
 870                                 dir_entry->path = make_path(parent_dir_entry->path,
 871                                                             cur_file->d_name);
 872                                 dir_entry->inum = cur_inum;
 873                                 list_add_tail(&dir_entry->list, &dir_head->list);
 874                         } else if (S_ISREG(st.st_mode)) {
 875                                 ret = add_file_items(trans, root, &cur_inode,
 876                                                      cur_inum, parent_inum, &st,
 877                                                      cur_file->d_name, out_fd);
 878                                 if (ret) {
 879                                         fprintf(stderr, "add_file_items failed\n");
 880                                         goto fail;
 881                                 }
 882                         } else if (S_ISLNK(st.st_mode)) {
 883                                 ret = add_symbolic_link(trans, root,
 884                                                         cur_inum, cur_file->d_name);
 885                                 if (ret) {
 886                                         fprintf(stderr, "add_symbolic_link failed\n");
 887                                         goto fail;
 888                                 }
 889                         }
 890                 }
 891
 892                 free_namelist(files, count);
 893                 free(parent_dir_entry);
 894
 895                 index_cnt = 2;
 896
 897         } while (!list_empty(&dir_head->list));
 898
 899 out:
 900         return !!ret;
 901 fail:
 902         free_namelist(files, count);
 903 fail_no_files:
 904         free(parent_dir_entry);
 905         goto out;
 906 fail_no_dir:
 907         free(dir_entry);
 908         goto out;
 909 }
 910
 911 static int open_target(char *output_name)
 912 {
 913         int output_fd;
 914         output_fd = open(output_name, O_CREAT | O_RDWR | O_TRUNC,
 915                          S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
 916
 917         return output_fd;
 918 }
 919
 920 static int create_chunks(struct btrfs_trans_handle *trans,
 921                          struct btrfs_root *root, u64 num_of_meta_chunks,
 922                          u64 size_of_data)
 923 {
 924         u64 chunk_start;
 925         u64 chunk_size;
 926         u64 meta_type = BTRFS_BLOCK_GROUP_METADATA;
 927         u64 data_type = BTRFS_BLOCK_GROUP_DATA;
 928         u64 minimum_data_chunk_size = 8 * 1024 * 1024;
 929         u64 i;
 930         int ret;
 931
 932         for (i = 0; i < num_of_meta_chunks; i++) {
 933                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 934                                         &chunk_start, &chunk_size, meta_type);
 935                 BUG_ON(ret);
 936                 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
 937                                              meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 938                                              chunk_start, chunk_size);
 939                 BUG_ON(ret);
 940                 set_extent_dirty(&root->fs_info->free_space_cache,
 941                                  chunk_start, chunk_start + chunk_size - 1, 0);
 942         }
 943
 944         if (size_of_data < minimum_data_chunk_size)
 945                 size_of_data = minimum_data_chunk_size;
 946
 947         ret = btrfs_alloc_data_chunk(trans, root->fs_info->extent_root,
 948                                      &chunk_start, size_of_data, data_type);
 949         BUG_ON(ret);
 950         ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
 951                                      data_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 952                                      chunk_start, size_of_data);
 953         BUG_ON(ret);
 954         set_extent_dirty(&root->fs_info->free_space_cache,
 955                          chunk_start, chunk_start + size_of_data - 1, 0);
 956         return ret;
 957 }
 958
 959 static int make_image(char *source_dir, struct btrfs_root *root, int out_fd)
 960 {
 961         int ret;
 962         struct btrfs_trans_handle *trans;
 963
 964         struct stat root_st;
 965
 966         struct directory_name_entry dir_head;
 967
 968         struct directory_name_entry *dir_entry = NULL;
 969
 970         ret = lstat(source_dir, &root_st);
 971         if (ret) {
 972                 fprintf(stderr, "unable to lstat the %s\n", source_dir);
 973                 goto out;
 974         }
 975
 976         INIT_LIST_HEAD(&dir_head.list);
 977
 978         trans = btrfs_start_transaction(root, 1);
 979         ret = traverse_directory(trans, root, source_dir, &dir_head, out_fd);
 980         if (ret) {
 981                 fprintf(stderr, "unable to traverse_directory\n");
 982                 goto fail;
 983         }
 984         btrfs_commit_transaction(trans, root);
 985
 986         printf("Making image is completed.\n");
 987         return 0;
 988 fail:
 989         while (!list_empty(&dir_head.list)) {
 990                 dir_entry = list_entry(dir_head.list.next,
 991                                        struct directory_name_entry, list);
 992                 list_del(&dir_entry->list);
 993                 free(dir_entry);
 994         }
 995 out:
 996         fprintf(stderr, "Making image is aborted.\n");
 997         return -1;
 998 }
 999
1000 /*
1001  * This ignores symlinks with unreadable targets and subdirs that can't
1002  * be read.  It's a best-effort to give a rough estimate of the size of
1003  * a subdir.  It doesn't guarantee that prepopulating btrfs from this
1004  * tree won't still run out of space.
1005  *
1006  * The rounding up to 4096 is questionable.  Previous code used du -B 4096.
1007  */
1008 static u64 global_total_size;
1009 static int ftw_add_entry_size(const char *fpath, const struct stat *st,
1010                               int type)
1011 {
1012         if (type == FTW_F || type == FTW_D)
1013                 global_total_size += round_up(st->st_size, 4096);
1014
1015         return 0;
1016 }
1017
1018 static u64 size_sourcedir(char *dir_name, u64 sectorsize,
1019                           u64 *num_of_meta_chunks_ret, u64 *size_of_data_ret)
1020 {
1021         u64 dir_size = 0;
1022         u64 total_size = 0;
1023         int ret;
1024         u64 default_chunk_size = 8 * 1024 * 1024;       /* 8MB */
1025         u64 allocated_meta_size = 8 * 1024 * 1024;      /* 8MB */
1026         u64 allocated_total_size = 20 * 1024 * 1024;    /* 20MB */
1027         u64 num_of_meta_chunks = 0;
1028         u64 num_of_data_chunks = 0;
1029         u64 num_of_allocated_meta_chunks =
1030                         allocated_meta_size / default_chunk_size;
1031
1032         global_total_size = 0;
1033         ret = ftw(dir_name, ftw_add_entry_size, 10);
1034         dir_size = global_total_size;
1035         if (ret < 0) {
1036                 fprintf(stderr, "ftw subdir walk of '%s' failed: %s\n",
1037                         dir_name, strerror(errno));
1038                 exit(1);
1039         }
1040
1041         num_of_data_chunks = (dir_size + default_chunk_size - 1) /
1042                 default_chunk_size;
1043
1044         num_of_meta_chunks = (dir_size / 2) / default_chunk_size;
1045         if (((dir_size / 2) % default_chunk_size) != 0)
1046                 num_of_meta_chunks++;
1047         if (num_of_meta_chunks <= num_of_allocated_meta_chunks)
1048                 num_of_meta_chunks = 0;
1049         else
1050                 num_of_meta_chunks -= num_of_allocated_meta_chunks;
1051
1052         total_size = allocated_total_size +
1053                      (num_of_data_chunks * default_chunk_size) +
1054                      (num_of_meta_chunks * default_chunk_size);
1055
1056         *num_of_meta_chunks_ret = num_of_meta_chunks;
1057         *size_of_data_ret = num_of_data_chunks * default_chunk_size;
1058         return total_size;
1059 }
1060
1061 static int zero_output_file(int out_fd, u64 size, u32 sectorsize)
1062 {
1063         int len = sectorsize;
1064         int loop_num = size / sectorsize;
1065         u64 location = 0;
1066         char *buf = malloc(len);
1067         int ret = 0, i;
1068         ssize_t written;
1069
1070         if (!buf)
1071                 return -ENOMEM;
1072         memset(buf, 0, len);
1073         for (i = 0; i < loop_num; i++) {
1074                 written = pwrite64(out_fd, buf, len, location);
1075                 if (written != len)
1076                         ret = -EIO;
1077                 location += sectorsize;
1078         }
1079         free(buf);
1080         return ret;
1081 }
1082
1083 static int check_leaf_or_node_size(u32 size, u32 sectorsize)
1084 {
1085         if (size < sectorsize) {
1086                 fprintf(stderr,
1087                         "Illegal leafsize (or nodesize) %u (smaller than %u)\n",
1088                         size, sectorsize);
1089                 return -1;
1090         } else if (size > BTRFS_MAX_METADATA_BLOCKSIZE) {
1091                 fprintf(stderr,
1092                         "Illegal leafsize (or nodesize) %u (larger than %u)\n",
1093                         size, BTRFS_MAX_METADATA_BLOCKSIZE);
1094                 return -1;
1095         } else if (size & (sectorsize - 1)) {
1096                 fprintf(stderr,
1097                         "Illegal leafsize (or nodesize) %u (not align to %u)\n",
1098                         size, sectorsize);
1099                 return -1;
1100         }
1101         return 0;
1102 }
1103
1104 static int is_ssd(const char *file)
1105 {
1106         blkid_probe probe;
1107         char wholedisk[32];
1108         char sysfs_path[PATH_MAX];
1109         dev_t devno;
1110         int fd;
1111         char rotational;
1112         int ret;
1113
1114         probe = blkid_new_probe_from_filename(file);
1115         if (!probe)
1116                 return 0;
1117
1118         /* Device number of this disk (possibly a partition) */
1119         devno = blkid_probe_get_devno(probe);
1120         if (!devno) {
1121                 blkid_free_probe(probe);
1122                 return 0;
1123         }
1124
1125         /* Get whole disk name (not full path) for this devno */
1126         ret = blkid_devno_to_wholedisk(devno,
1127                         wholedisk, sizeof(wholedisk), NULL);
1128         if (ret) {
1129                 blkid_free_probe(probe);
1130                 return 0;
1131         }
1132
1133         snprintf(sysfs_path, PATH_MAX, "/sys/block/%s/queue/rotational",
1134                  wholedisk);
1135
1136         blkid_free_probe(probe);
1137
1138         fd = open(sysfs_path, O_RDONLY);
1139         if (fd < 0) {
1140                 return 0;
1141         }
1142
1143         if (read(fd, &rotational, sizeof(char)) < sizeof(char)) {
1144                 close(fd);
1145                 return 0;
1146         }
1147         close(fd);
1148
1149         return !atoi((const char *)&rotational);
1150 }
1151
1152 #define BTRFS_FEATURE_LIST_ALL          (1ULL << 63)
1153
1154 static const struct btrfs_fs_feature {
1155         const char *name;
1156         u64 flag;
1157         const char *desc;
1158 } mkfs_features[] = {
1159         { "mixed-bg", BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS,
1160                 "mixed data and metadata block groups" },
1161         { "extref", BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF,
1162                 "increased hardlink limit per file to 65536" },
1163         { "raid56", BTRFS_FEATURE_INCOMPAT_RAID56,
1164                 "raid56 extended format" },
1165         { "skinny-metadata", BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA,
1166                 "reduced-size metadata extent refs" },
1167         { "no-holes", BTRFS_FEATURE_INCOMPAT_NO_HOLES,
1168                 "no explicit hole extents for files" },
1169         /* Keep this one last */
1170         { "list-all", BTRFS_FEATURE_LIST_ALL, NULL }
1171 };
1172
1173 static void list_all_fs_features(void)
1174 {
1175         int i;
1176
1177         fprintf(stderr, "Filesystem features available at mkfs time:\n");
1178         for (i = 0; i < ARRAY_SIZE(mkfs_features) - 1; i++) {
1179                 char *is_default = "";
1180
1181                 if (mkfs_features[i].flag & DEFAULT_MKFS_FEATURES)
1182                         is_default = ", default";
1183                 fprintf(stderr, "%-20s- %s (0x%llx%s)\n",
1184                                 mkfs_features[i].name,
1185                                 mkfs_features[i].desc,
1186                                 mkfs_features[i].flag,
1187                                 is_default);
1188         }
1189 }
1190
1191 static int parse_one_fs_feature(const char *name, u64 *flags)
1192 {
1193         int i;
1194         int found = 0;
1195
1196         for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) {
1197                 if (name[0] == '^' &&
1198                         !strcmp(mkfs_features[i].name, name + 1)) {
1199                         *flags &= ~ mkfs_features[i].flag;
1200                         found = 1;
1201                 } else if (!strcmp(mkfs_features[i].name, name)) {
1202                         *flags |= mkfs_features[i].flag;
1203                         found = 1;
1204                 }
1205         }
1206
1207         return !found;
1208 }
1209
1210 static void process_fs_features(u64 flags)
1211 {
1212         int i;
1213
1214         for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) {
1215                 if (flags & mkfs_features[i].flag) {
1216                         printf("Turning ON incompat feature '%s': %s\n",
1217                                 mkfs_features[i].name,
1218                                 mkfs_features[i].desc);
1219                 }
1220         }
1221 }
1222
1223
1224 /*
1225  * Return NULL if all features were parsed fine, otherwise return the name of
1226  * the first unparsed.
1227  */
1228 static char* parse_fs_features(char *namelist, u64 *flags)
1229 {
1230         char *this_char;
1231         char *save_ptr = NULL; /* Satisfy static checkers */
1232
1233         for (this_char = strtok_r(namelist, ",", &save_ptr);
1234              this_char != NULL;
1235              this_char = strtok_r(NULL, ",", &save_ptr)) {
1236                 if (parse_one_fs_feature(this_char, flags))
1237                         return this_char;
1238         }
1239
1240         return NULL;
1241 }
1242
1243 int main(int ac, char **av)
1244 {
1245         char *file;
1246         struct btrfs_root *root;
1247         struct btrfs_trans_handle *trans;
1248         char *label = NULL;
1249         char *first_file;
1250         u64 block_count = 0;
1251         u64 dev_block_count = 0;
1252         u64 blocks[7];
1253         u64 alloc_start = 0;
1254         u64 metadata_profile = 0;
1255         u64 data_profile = 0;
1256         u32 leafsize = max_t(u32, sysconf(_SC_PAGESIZE), DEFAULT_MKFS_LEAF_SIZE);
1257         u32 sectorsize = 4096;
1258         u32 nodesize = leafsize;
1259         u32 stripesize = 4096;
1260         int zero_end = 1;
1261         int option_index = 0;
1262         int fd;
1263         int ret;
1264         int i;
1265         int mixed = 0;
1266         int leaf_forced = 0;
1267         int data_profile_opt = 0;
1268         int metadata_profile_opt = 0;
1269         int discard = 1;
1270         int ssd = 0;
1271         int force_overwrite = 0;
1272
1273         char *source_dir = NULL;
1274         int source_dir_set = 0;
1275         u64 num_of_meta_chunks = 0;
1276         u64 size_of_data = 0;
1277         u64 source_dir_size = 0;
1278         int dev_cnt = 0;
1279         int saved_optind;
1280         char estr[100];
1281         char *fs_uuid = NULL;
1282         u64 features = DEFAULT_MKFS_FEATURES;
1283
1284         while(1) {
1285                 int c;
1286                 c = getopt_long(ac, av, "A:b:fl:n:s:m:d:L:O:r:U:VMK",
1287                                 long_options, &option_index);
1288                 if (c < 0)
1289                         break;
1290                 switch(c) {
1291                         case 'A':
1292                                 alloc_start = parse_size(optarg);
1293                                 break;
1294                         case 'f':
1295                                 force_overwrite = 1;
1296                                 break;
1297                         case 'd':
1298                                 data_profile = parse_profile(optarg);
1299                                 data_profile_opt = 1;
1300                                 break;
1301                         case 'l':
1302                         case 'n':
1303                                 nodesize = parse_size(optarg);
1304                                 leafsize = parse_size(optarg);
1305                                 leaf_forced = 1;
1306                                 break;
1307                         case 'L':
1308                                 label = parse_label(optarg);
1309                                 break;
1310                         case 'm':
1311                                 metadata_profile = parse_profile(optarg);
1312                                 metadata_profile_opt = 1;
1313                                 break;
1314                         case 'M':
1315                                 mixed = 1;
1316                                 break;
1317                         case 'O': {
1318                                 char *orig = strdup(optarg);
1319                                 char *tmp = orig;
1320
1321                                 tmp = parse_fs_features(tmp, &features);
1322                                 if (tmp) {
1323                                         fprintf(stderr,
1324                                                 "Unrecognized filesystem feature '%s'\n",
1325                                                         tmp);
1326                                         free(orig);
1327                                         exit(1);
1328                                 }
1329                                 free(orig);
1330                                 if (features & BTRFS_FEATURE_LIST_ALL) {
1331                                         list_all_fs_features();
1332                                         exit(0);
1333                                 }
1334                                 break;
1335                                 }
1336                         case 's':
1337                                 sectorsize = parse_size(optarg);
1338                                 break;
1339                         case 'b':
1340                                 block_count = parse_size(optarg);
1341                                 if (block_count <= BTRFS_MKFS_SMALL_VOLUME_SIZE) {
1342                                         fprintf(stdout,
1343                                 "SMALL VOLUME: forcing mixed metadata/data groups\n");
1344                                         mixed = 1;
1345                                 }
1346                                 zero_end = 0;
1347                                 break;
1348                         case 'V':
1349                                 print_version();
1350                                 break;
1351                         case 'r':
1352                                 source_dir = optarg;
1353                                 source_dir_set = 1;
1354                                 break;
1355                         case 'U':
1356                                 fs_uuid = optarg;
1357                                 break;
1358                         case 'K':
1359                                 discard = 0;
1360                                 break;
1361                         default:
1362                                 print_usage();
1363                 }
1364         }
1365         sectorsize = max(sectorsize, (u32)sysconf(_SC_PAGESIZE));
1366         if (check_leaf_or_node_size(leafsize, sectorsize))
1367                 exit(1);
1368         if (check_leaf_or_node_size(nodesize, sectorsize))
1369                 exit(1);
1370         saved_optind = optind;
1371         dev_cnt = ac - optind;
1372         if (dev_cnt == 0)
1373                 print_usage();
1374
1375         if (source_dir_set && dev_cnt > 1) {
1376                 fprintf(stderr,
1377                         "The -r option is limited to a single device\n");
1378                 exit(1);
1379         }
1380
1381         if (fs_uuid) {
1382                 uuid_t dummy_uuid;
1383
1384                 if (uuid_parse(fs_uuid, dummy_uuid) != 0) {
1385                         fprintf(stderr, "could not parse UUID: %s\n", fs_uuid);
1386                         exit(1);
1387                 }
1388                 if (!test_uuid_unique(fs_uuid)) {
1389                         fprintf(stderr, "non-unique UUID: %s\n", fs_uuid);
1390                         exit(1);
1391                 }
1392         }
1393
1394         while (dev_cnt-- > 0) {
1395                 file = av[optind++];
1396                 if (is_block_device(file))
1397                         if (test_dev_for_mkfs(file, force_overwrite, estr)) {
1398                                 fprintf(stderr, "Error: %s", estr);
1399                                 exit(1);
1400                         }
1401         }
1402
1403         optind = saved_optind;
1404         dev_cnt = ac - optind;
1405
1406         file = av[optind++];
1407         ssd = is_ssd(file);
1408
1409         if (is_vol_small(file)) {
1410                 printf("SMALL VOLUME: forcing mixed metadata/data groups\n");
1411                 mixed = 1;
1412         }
1413
1414         /*
1415         * Set default profiles according to number of added devices.
1416         * For mixed groups defaults are single/single.
1417         */
1418         if (!mixed) {
1419                 if (!metadata_profile_opt) {
1420                         if (dev_cnt == 1 && ssd)
1421                                 printf("Detected a SSD, turning off metadata "
1422                                 "duplication.  Mkfs with -m dup if you want to "
1423                                 "force metadata duplication.\n");
1424
1425                         metadata_profile = (dev_cnt > 1) ?
1426                                         BTRFS_BLOCK_GROUP_RAID1 : (ssd) ?
1427                                         0: BTRFS_BLOCK_GROUP_DUP;
1428                 }
1429                 if (!data_profile_opt) {
1430                         data_profile = (dev_cnt > 1) ?
1431                                 BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */
1432                 }
1433         } else {
1434                 u32 best_leafsize = max_t(u32, sysconf(_SC_PAGESIZE), sectorsize);
1435
1436                 if (metadata_profile_opt || data_profile_opt) {
1437                         if (metadata_profile != data_profile) {
1438                                 fprintf(stderr,
1439         "ERROR: With mixed block groups data and metadata profiles must be the same\n");
1440                                 exit(1);
1441                         }
1442                 }
1443
1444                 if (!leaf_forced) {
1445                         leafsize = best_leafsize;
1446                         nodesize = best_leafsize;
1447                         if (check_leaf_or_node_size(leafsize, sectorsize))
1448                                 exit(1);
1449                 }
1450                 if (leafsize != sectorsize) {
1451                         fprintf(stderr, "Error: mixed metadata/data block groups "
1452                                 "require metadata blocksizes equal to the sectorsize\n");
1453                         exit(1);
1454                 }
1455         }
1456
1457         /* Check device/block_count after the leafsize is determined */
1458         if (block_count && block_count < btrfs_min_dev_size(leafsize)) {
1459                 fprintf(stderr,
1460                         "Size '%llu' is too small to make a usable filesystem\n",
1461                         block_count);
1462                 fprintf(stderr,
1463                         "Minimum size for btrfs filesystem is %llu\n",
1464                         btrfs_min_dev_size(leafsize));
1465                 exit(1);
1466         }
1467         for (i = saved_optind; i < saved_optind + dev_cnt; i++) {
1468                 char *path;
1469
1470                 path = av[i];
1471                 ret = test_minimum_size(path, leafsize);
1472                 if (ret < 0) {
1473                         fprintf(stderr, "Failed to check size for '%s': %s\n",
1474                                 path, strerror(-ret));
1475                         exit (1);
1476                 }
1477                 if (ret > 0) {
1478                         fprintf(stderr,
1479                                 "'%s' is too small to make a usable filesystem\n",
1480                                 path);
1481                         fprintf(stderr,
1482                                 "Minimum size for each btrfs device is %llu.\n",
1483                                 btrfs_min_dev_size(leafsize));
1484                         exit(1);
1485                 }
1486         }
1487         ret = test_num_disk_vs_raid(metadata_profile, data_profile,
1488                         dev_cnt, mixed, estr);
1489         if (ret) {
1490                 fprintf(stderr, "Error: %s\n", estr);
1491                 exit(1);
1492         }
1493
1494         /* if we are here that means all devs are good to btrfsify */
1495         printf("%s\n", BTRFS_BUILD_VERSION);
1496         printf("See http://btrfs.wiki.kernel.org for more information.\n\n");
1497
1498         dev_cnt--;
1499
1500         if (!source_dir_set) {
1501                 /*
1502                  * open without O_EXCL so that the problem should not
1503                  * occur by the following processing.
1504                  * (btrfs_register_one_device() fails if O_EXCL is on)
1505                  */
1506                 fd = open(file, O_RDWR);
1507                 if (fd < 0) {
1508                         fprintf(stderr, "unable to open %s: %s\n", file,
1509                                 strerror(errno));
1510                         exit(1);
1511                 }
1512                 first_file = file;
1513                 ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count,
1514                                            block_count, &mixed, discard);
1515                 if (ret) {
1516                         close(fd);
1517                         exit(1);
1518                 }
1519                 if (block_count && block_count > dev_block_count) {
1520                         fprintf(stderr, "%s is smaller than requested size\n", file);
1521                         exit(1);
1522                 }
1523         } else {
1524                 fd = open_target(file);
1525                 if (fd < 0) {
1526                         fprintf(stderr, "unable to open the %s\n", file);
1527                         exit(1);
1528                 }
1529
1530                 first_file = file;
1531                 source_dir_size = size_sourcedir(source_dir, sectorsize,
1532                                              &num_of_meta_chunks, &size_of_data);
1533                 if(block_count < source_dir_size)
1534                         block_count = source_dir_size;
1535                 ret = zero_output_file(fd, block_count, sectorsize);
1536                 if (ret) {
1537                         fprintf(stderr, "unable to zero the output file\n");
1538                         exit(1);
1539                 }
1540                 /* our "device" is the new image file */
1541                 dev_block_count = block_count;
1542         }
1543
1544         /* To create the first block group and chunk 0 in make_btrfs */
1545         if (dev_block_count < BTRFS_MKFS_SYSTEM_GROUP_SIZE) {
1546                 fprintf(stderr, "device is too small to make filesystem\n");
1547                 exit(1);
1548         }
1549
1550         blocks[0] = BTRFS_SUPER_INFO_OFFSET;
1551         for (i = 1; i < 7; i++) {
1552                 blocks[i] = BTRFS_SUPER_INFO_OFFSET + 1024 * 1024 +
1553                         leafsize * i;
1554         }
1555
1556         /*
1557          * FS features that can be set by other means than -O
1558          * just set the bit here
1559          */
1560         if (mixed)
1561                 features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
1562
1563         if ((data_profile | metadata_profile) &
1564             (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
1565                 features |= BTRFS_FEATURE_INCOMPAT_RAID56;
1566         }
1567
1568         process_fs_features(features);
1569
1570         ret = make_btrfs(fd, file, label, fs_uuid, blocks, dev_block_count,
1571                          nodesize, leafsize,
1572                          sectorsize, stripesize, features);
1573         if (ret) {
1574                 fprintf(stderr, "error during mkfs: %s\n", strerror(-ret));
1575                 exit(1);
1576         }
1577
1578         root = open_ctree(file, 0, OPEN_CTREE_WRITES);
1579         if (!root) {
1580                 fprintf(stderr, "Open ctree failed\n");
1581                 close(fd);
1582                 exit(1);
1583         }
1584         root->fs_info->alloc_start = alloc_start;
1585
1586         ret = make_root_dir(root, mixed);
1587         if (ret) {
1588                 fprintf(stderr, "failed to setup the root directory\n");
1589                 exit(1);
1590         }
1591
1592         trans = btrfs_start_transaction(root, 1);
1593
1594         btrfs_register_one_device(file);
1595
1596         if (dev_cnt == 0)
1597                 goto raid_groups;
1598
1599         while (dev_cnt-- > 0) {
1600                 int old_mixed = mixed;
1601
1602                 file = av[optind++];
1603
1604                 /*
1605                  * open without O_EXCL so that the problem should not
1606                  * occur by the following processing.
1607                  * (btrfs_register_one_device() fails if O_EXCL is on)
1608                  */
1609                 fd = open(file, O_RDWR);
1610                 if (fd < 0) {
1611                         fprintf(stderr, "unable to open %s: %s\n", file,
1612                                 strerror(errno));
1613                         exit(1);
1614                 }
1615                 ret = btrfs_device_already_in_root(root, fd,
1616                                                    BTRFS_SUPER_INFO_OFFSET);
1617                 if (ret) {
1618                         fprintf(stderr, "skipping duplicate device %s in FS\n",
1619                                 file);
1620                         close(fd);
1621                         continue;
1622                 }
1623                 ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count,
1624                                            block_count, &mixed, discard);
1625                 if (ret) {
1626                         close(fd);
1627                         exit(1);
1628                 }
1629                 mixed = old_mixed;
1630
1631                 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
1632                                         sectorsize, sectorsize, sectorsize);
1633                 BUG_ON(ret);
1634                 btrfs_register_one_device(file);
1635         }
1636
1637 raid_groups:
1638         if (!source_dir_set) {
1639                 ret = create_raid_groups(trans, root, data_profile,
1640                                  data_profile_opt, metadata_profile,
1641                                  mixed);
1642                 BUG_ON(ret);
1643         }
1644
1645         ret = create_data_reloc_tree(trans, root);
1646         BUG_ON(ret);
1647
1648         printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
1649             "sectorsize %u size %s\n",
1650             label, first_file, nodesize, leafsize, sectorsize,
1651             pretty_size(btrfs_super_total_bytes(root->fs_info->super_copy)));
1652
1653         btrfs_commit_transaction(trans, root);
1654
1655         if (source_dir_set) {
1656                 trans = btrfs_start_transaction(root, 1);
1657                 ret = create_chunks(trans, root,
1658                                     num_of_meta_chunks, size_of_data);
1659                 BUG_ON(ret);
1660                 btrfs_commit_transaction(trans, root);
1661
1662                 ret = make_image(source_dir, root, fd);
1663                 BUG_ON(ret);
1664         }
1665
1666         ret = close_ctree(root);
1667         BUG_ON(ret);
1668         free(label);
1669         return 0;
1670 }