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