mkfs.c

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