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