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 #ifndef __CHECKER__
  25 #include <sys/ioctl.h>
  26 #include <sys/mount.h>
  27 #include "ioctl.h"
  28 #endif
  29
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34 #include <sys/dir.h>
  35 #include <fcntl.h>
  36 #include <unistd.h>
  37 #include <getopt.h>
  38 #include <uuid/uuid.h>
  39 #include <linux/fs.h>
  40 #include <ctype.h>
  41 #include <attr/xattr.h>
  42 #include <blkid/blkid.h>
  43 #include <ftw.h>
  44 #include "kerncompat.h"
  45 #include "ctree.h"
  46 #include "disk-io.h"
  47 #include "volumes.h"
  48 #include "transaction.h"
  49 #include "utils.h"
  50 #include "version.h"
  51
  52 static u64 index_cnt = 2;
  53
  54 struct directory_name_entry {
  55         char *dir_name;
  56         char *path;
  57         ino_t inum;
  58         struct list_head list;
  59 };
  60
  61 static int make_root_dir(struct btrfs_root *root, int mixed)
  62 {
  63         struct btrfs_trans_handle *trans;
  64         struct btrfs_key location;
  65         u64 bytes_used;
  66         u64 chunk_start = 0;
  67         u64 chunk_size = 0;
  68         int ret;
  69
  70         trans = btrfs_start_transaction(root, 1);
  71         bytes_used = btrfs_super_bytes_used(&root->fs_info->super_copy);
  72
  73         root->fs_info->system_allocs = 1;
  74         ret = btrfs_make_block_group(trans, root, bytes_used,
  75                                      BTRFS_BLOCK_GROUP_SYSTEM,
  76                                      BTRFS_FIRST_CHUNK_TREE_OBJECTID,
  77                                      0, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
  78         BUG_ON(ret);
  79
  80         if (mixed) {
  81                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
  82                                         &chunk_start, &chunk_size,
  83                                         BTRFS_BLOCK_GROUP_METADATA |
  84                                         BTRFS_BLOCK_GROUP_DATA);
  85                 BUG_ON(ret);
  86                 ret = btrfs_make_block_group(trans, root, 0,
  87                                              BTRFS_BLOCK_GROUP_METADATA |
  88                                              BTRFS_BLOCK_GROUP_DATA,
  89                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
  90                                              chunk_start, chunk_size);
  91                 BUG_ON(ret);
  92                 printf("Created a data/metadata chunk of size %llu\n", chunk_size);
  93         } else {
  94                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
  95                                         &chunk_start, &chunk_size,
  96                                         BTRFS_BLOCK_GROUP_METADATA);
  97                 BUG_ON(ret);
  98                 ret = btrfs_make_block_group(trans, root, 0,
  99                                              BTRFS_BLOCK_GROUP_METADATA,
 100                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 101                                              chunk_start, chunk_size);
 102                 BUG_ON(ret);
 103         }
 104
 105         root->fs_info->system_allocs = 0;
 106         btrfs_commit_transaction(trans, root);
 107         trans = btrfs_start_transaction(root, 1);
 108         BUG_ON(!trans);
 109
 110         if (!mixed) {
 111                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 112                                         &chunk_start, &chunk_size,
 113                                         BTRFS_BLOCK_GROUP_DATA);
 114                 BUG_ON(ret);
 115                 ret = btrfs_make_block_group(trans, root, 0,
 116                                              BTRFS_BLOCK_GROUP_DATA,
 117                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 118                                              chunk_start, chunk_size);
 119                 BUG_ON(ret);
 120         }
 121
 122         ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
 123                               BTRFS_ROOT_TREE_DIR_OBJECTID);
 124         if (ret)
 125                 goto err;
 126         ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
 127         if (ret)
 128                 goto err;
 129         memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
 130         location.offset = (u64)-1;
 131         ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
 132                         "default", 7,
 133                         btrfs_super_root_dir(&root->fs_info->super_copy),
 134                         &location, BTRFS_FT_DIR, 0);
 135         if (ret)
 136                 goto err;
 137
 138         ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
 139                              "default", 7, location.objectid,
 140                              BTRFS_ROOT_TREE_DIR_OBJECTID, 0);
 141         if (ret)
 142                 goto err;
 143
 144         btrfs_commit_transaction(trans, root);
 145 err:
 146         return ret;
 147 }
 148
 149 static int recow_roots(struct btrfs_trans_handle *trans,
 150                        struct btrfs_root *root)
 151 {
 152         int ret;
 153         struct extent_buffer *tmp;
 154         struct btrfs_fs_info *info = root->fs_info;
 155
 156         ret = __btrfs_cow_block(trans, info->fs_root, info->fs_root->node,
 157                                 NULL, 0, &tmp, 0, 0);
 158         BUG_ON(ret);
 159         free_extent_buffer(tmp);
 160
 161         ret = __btrfs_cow_block(trans, info->tree_root, info->tree_root->node,
 162                                 NULL, 0, &tmp, 0, 0);
 163         BUG_ON(ret);
 164         free_extent_buffer(tmp);
 165
 166         ret = __btrfs_cow_block(trans, info->extent_root,
 167                                 info->extent_root->node, NULL, 0, &tmp, 0, 0);
 168         BUG_ON(ret);
 169         free_extent_buffer(tmp);
 170
 171         ret = __btrfs_cow_block(trans, info->chunk_root, info->chunk_root->node,
 172                                 NULL, 0, &tmp, 0, 0);
 173         BUG_ON(ret);
 174         free_extent_buffer(tmp);
 175
 176
 177         ret = __btrfs_cow_block(trans, info->dev_root, info->dev_root->node,
 178                                 NULL, 0, &tmp, 0, 0);
 179         BUG_ON(ret);
 180         free_extent_buffer(tmp);
 181
 182         ret = __btrfs_cow_block(trans, info->csum_root, info->csum_root->node,
 183                                 NULL, 0, &tmp, 0, 0);
 184         BUG_ON(ret);
 185         free_extent_buffer(tmp);
 186
 187         return 0;
 188 }
 189
 190 static int create_one_raid_group(struct btrfs_trans_handle *trans,
 191                               struct btrfs_root *root, u64 type)
 192 {
 193         u64 chunk_start;
 194         u64 chunk_size;
 195         int ret;
 196
 197         ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 198                                 &chunk_start, &chunk_size, type);
 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         u64 allowed;
 214         int ret;
 215
 216         /*
 217          * Set default profiles according to number of added devices.
 218          * For mixed groups defaults are single/single.
 219          */
 220         if (!metadata_profile_opt && !mixed) {
 221                 if (num_devices == 1 && ssd)
 222                         printf("Detected a SSD, turning off metadata "
 223                                "duplication.  Mkfs with -m dup if you want to "
 224                                "force metadata duplication.\n");
 225                 metadata_profile = (num_devices > 1) ?
 226                         BTRFS_BLOCK_GROUP_RAID1 : (ssd) ? 0: BTRFS_BLOCK_GROUP_DUP;
 227         }
 228         if (!data_profile_opt && !mixed) {
 229                 data_profile = (num_devices > 1) ?
 230                         BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */
 231         }
 232
 233         if (num_devices == 1)
 234                 allowed = BTRFS_BLOCK_GROUP_DUP;
 235         else if (num_devices >= 4) {
 236                 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
 237                         BTRFS_BLOCK_GROUP_RAID10;
 238         } else
 239                 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1;
 240
 241         if (metadata_profile & ~allowed) {
 242                 fprintf(stderr, "unable to create FS with metadata "
 243                         "profile %llu (have %llu devices)\n", metadata_profile,
 244                         num_devices);
 245                 exit(1);
 246         }
 247         if (data_profile & ~allowed) {
 248                 fprintf(stderr, "unable to create FS with data "
 249                         "profile %llu (have %llu devices)\n", data_profile,
 250                         num_devices);
 251                 exit(1);
 252         }
 253
 254         /* allow dup'ed data chunks only in mixed mode */
 255         if (!mixed && (data_profile & BTRFS_BLOCK_GROUP_DUP)) {
 256                 fprintf(stderr, "dup for data is allowed only in mixed mode\n");
 257                 exit(1);
 258         }
 259
 260         if (allowed & metadata_profile) {
 261                 u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA;
 262
 263                 ret = create_one_raid_group(trans, root,
 264                                             BTRFS_BLOCK_GROUP_SYSTEM |
 265                                             (allowed & metadata_profile));
 266                 BUG_ON(ret);
 267
 268                 if (mixed)
 269                         meta_flags |= BTRFS_BLOCK_GROUP_DATA;
 270
 271                 ret = create_one_raid_group(trans, root, meta_flags |
 272                                             (allowed & metadata_profile));
 273                 BUG_ON(ret);
 274
 275                 ret = recow_roots(trans, root);
 276                 BUG_ON(ret);
 277         }
 278         if (!mixed && num_devices > 1 && (allowed & data_profile)) {
 279                 ret = create_one_raid_group(trans, root,
 280                                             BTRFS_BLOCK_GROUP_DATA |
 281                                             (allowed & data_profile));
 282                 BUG_ON(ret);
 283         }
 284         return 0;
 285 }
 286
 287 static int create_data_reloc_tree(struct btrfs_trans_handle *trans,
 288                                   struct btrfs_root *root)
 289 {
 290         struct btrfs_key location;
 291         struct btrfs_root_item root_item;
 292         struct extent_buffer *tmp;
 293         u64 objectid = BTRFS_DATA_RELOC_TREE_OBJECTID;
 294         int ret;
 295
 296         ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
 297         BUG_ON(ret);
 298
 299         memcpy(&root_item, &root->root_item, sizeof(root_item));
 300         btrfs_set_root_bytenr(&root_item, tmp->start);
 301         btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
 302         btrfs_set_root_generation(&root_item, trans->transid);
 303         free_extent_buffer(tmp);
 304
 305         location.objectid = objectid;
 306         location.type = BTRFS_ROOT_ITEM_KEY;
 307         location.offset = 0;
 308         ret = btrfs_insert_root(trans, root->fs_info->tree_root,
 309                                 &location, &root_item);
 310         BUG_ON(ret);
 311         return 0;
 312 }
 313
 314 static void print_usage(void)
 315 {
 316         fprintf(stderr, "usage: mkfs.btrfs [options] dev [ dev ... ]\n");
 317         fprintf(stderr, "options:\n");
 318         fprintf(stderr, "\t -A --alloc-start the offset to start the FS\n");
 319         fprintf(stderr, "\t -b --byte-count total number of bytes in the FS\n");
 320         fprintf(stderr, "\t -d --data data profile, raid0, raid1, raid10, dup or single\n");
 321         fprintf(stderr, "\t -l --leafsize size of btree leaves\n");
 322         fprintf(stderr, "\t -L --label set a label\n");
 323         fprintf(stderr, "\t -m --metadata metadata profile, values like data profile\n");
 324         fprintf(stderr, "\t -M --mixed mix metadata and data together\n");
 325         fprintf(stderr, "\t -n --nodesize size of btree nodes\n");
 326         fprintf(stderr, "\t -s --sectorsize min block allocation\n");
 327         fprintf(stderr, "\t -r --rootdir the source directory\n");
 328         fprintf(stderr, "\t -K --nodiscard do not perform whole device TRIM\n");
 329         fprintf(stderr, "\t -V --version print the mkfs.btrfs version and exit\n");
 330         fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
 331         exit(1);
 332 }
 333
 334 static void print_version(void)
 335 {
 336         fprintf(stderr, "mkfs.btrfs, part of %s\n", BTRFS_BUILD_VERSION);
 337         exit(0);
 338 }
 339
 340 static u64 parse_profile(char *s)
 341 {
 342         if (strcmp(s, "raid0") == 0) {
 343                 return BTRFS_BLOCK_GROUP_RAID0;
 344         } else if (strcmp(s, "raid1") == 0) {
 345                 return BTRFS_BLOCK_GROUP_RAID1;
 346         } else if (strcmp(s, "raid10") == 0) {
 347                 return BTRFS_BLOCK_GROUP_RAID10;
 348         } else if (strcmp(s, "dup") == 0) {
 349                 return BTRFS_BLOCK_GROUP_DUP;
 350         } else if (strcmp(s, "single") == 0) {
 351                 return 0;
 352         } else {
 353                 fprintf(stderr, "Unknown profile %s\n", s);
 354                 print_usage();
 355         }
 356         /* not reached */
 357         return 0;
 358 }
 359
 360 static char *parse_label(char *input)
 361 {
 362         int len = strlen(input);
 363
 364         if (len >= BTRFS_LABEL_SIZE) {
 365                 fprintf(stderr, "Label %s is too long (max %d)\n", input,
 366                         BTRFS_LABEL_SIZE - 1);
 367                 exit(1);
 368         }
 369         return strdup(input);
 370 }
 371
 372 static struct option long_options[] = {
 373         { "alloc-start", 1, NULL, 'A'},
 374         { "byte-count", 1, NULL, 'b' },
 375         { "leafsize", 1, NULL, 'l' },
 376         { "label", 1, NULL, 'L'},
 377         { "metadata", 1, NULL, 'm' },
 378         { "mixed", 0, NULL, 'M' },
 379         { "nodesize", 1, NULL, 'n' },
 380         { "sectorsize", 1, NULL, 's' },
 381         { "data", 1, NULL, 'd' },
 382         { "version", 0, NULL, 'V' },
 383         { "rootdir", 1, NULL, 'r' },
 384         { "nodiscard", 0, NULL, 'K' },
 385         { 0, 0, 0, 0}
 386 };
 387
 388 static int add_directory_items(struct btrfs_trans_handle *trans,
 389                                struct btrfs_root *root, u64 objectid,
 390                                ino_t parent_inum, const char *name,
 391                                struct stat *st, int *dir_index_cnt)
 392 {
 393         int ret;
 394         int name_len;
 395         struct btrfs_key location;
 396         u8 filetype = 0;
 397
 398         name_len = strlen(name);
 399
 400         location.objectid = objectid;
 401         location.offset = 0;
 402         btrfs_set_key_type(&location, BTRFS_INODE_ITEM_KEY);
 403
 404         if (S_ISDIR(st->st_mode))
 405                 filetype = BTRFS_FT_DIR;
 406         if (S_ISREG(st->st_mode))
 407                 filetype = BTRFS_FT_REG_FILE;
 408         if (S_ISLNK(st->st_mode))
 409                 filetype = BTRFS_FT_SYMLINK;
 410
 411         ret = btrfs_insert_dir_item(trans, root, name, name_len,
 412                                     parent_inum, &location,
 413                                     filetype, index_cnt);
 414
 415         *dir_index_cnt = index_cnt;
 416         index_cnt++;
 417
 418         return ret;
 419 }
 420
 421 static int fill_inode_item(struct btrfs_trans_handle *trans,
 422                            struct btrfs_root *root,
 423                            struct btrfs_inode_item *dst, struct stat *src)
 424 {
 425         u64 blocks = 0;
 426         u64 sectorsize = root->sectorsize;
 427
 428         /*
 429          * btrfs_inode_item has some reserved fields
 430          * and represents on-disk inode entry, so
 431          * zero everything to prevent information leak
 432          */
 433         memset(dst, 0, sizeof (*dst));
 434
 435         btrfs_set_stack_inode_generation(dst, trans->transid);
 436         btrfs_set_stack_inode_size(dst, src->st_size);
 437         btrfs_set_stack_inode_nbytes(dst, 0);
 438         btrfs_set_stack_inode_block_group(dst, 0);
 439         btrfs_set_stack_inode_nlink(dst, src->st_nlink);
 440         btrfs_set_stack_inode_uid(dst, src->st_uid);
 441         btrfs_set_stack_inode_gid(dst, src->st_gid);
 442         btrfs_set_stack_inode_mode(dst, src->st_mode);
 443         btrfs_set_stack_inode_rdev(dst, 0);
 444         btrfs_set_stack_inode_flags(dst, 0);
 445         btrfs_set_stack_timespec_sec(&dst->atime, src->st_atime);
 446         btrfs_set_stack_timespec_nsec(&dst->atime, 0);
 447         btrfs_set_stack_timespec_sec(&dst->ctime, src->st_ctime);
 448         btrfs_set_stack_timespec_nsec(&dst->ctime, 0);
 449         btrfs_set_stack_timespec_sec(&dst->mtime, src->st_mtime);
 450         btrfs_set_stack_timespec_nsec(&dst->mtime, 0);
 451         btrfs_set_stack_timespec_sec(&dst->otime, 0);
 452         btrfs_set_stack_timespec_nsec(&dst->otime, 0);
 453
 454         if (S_ISDIR(src->st_mode)) {
 455                 btrfs_set_stack_inode_size(dst, 0);
 456                 btrfs_set_stack_inode_nlink(dst, 1);
 457         }
 458         if (S_ISREG(src->st_mode)) {
 459                 btrfs_set_stack_inode_size(dst, (u64)src->st_size);
 460                 if (src->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root))
 461                         btrfs_set_stack_inode_nbytes(dst, src->st_size);
 462                 else {
 463                         blocks = src->st_size / sectorsize;
 464                         if (src->st_size % sectorsize)
 465                                 blocks += 1;
 466                         blocks *= sectorsize;
 467                         btrfs_set_stack_inode_nbytes(dst, blocks);
 468                 }
 469         }
 470         if (S_ISLNK(src->st_mode))
 471                 btrfs_set_stack_inode_nbytes(dst, src->st_size + 1);
 472
 473         return 0;
 474 }
 475
 476 static int directory_select(const struct direct *entry)
 477 {
 478         if ((strncmp(entry->d_name, ".", entry->d_reclen) == 0) ||
 479                 (strncmp(entry->d_name, "..", entry->d_reclen) == 0))
 480                 return 0;
 481         else
 482                 return 1;
 483 }
 484
 485 static void free_namelist(struct direct **files, int count)
 486 {
 487         int i;
 488
 489         if (count < 0)
 490                 return;
 491
 492         for (i = 0; i < count; ++i)
 493                 free(files[i]);
 494         free(files);
 495 }
 496
 497 static u64 calculate_dir_inode_size(char *dirname)
 498 {
 499         int count, i;
 500         struct direct **files, *cur_file;
 501         u64 dir_inode_size = 0;
 502
 503         count = scandir(dirname, &files, directory_select, NULL);
 504
 505         for (i = 0; i < count; i++) {
 506                 cur_file = files[i];
 507                 dir_inode_size += strlen(cur_file->d_name);
 508         }
 509
 510         free_namelist(files, count);
 511
 512         dir_inode_size *= 2;
 513         return dir_inode_size;
 514 }
 515
 516 static int add_inode_items(struct btrfs_trans_handle *trans,
 517                            struct btrfs_root *root,
 518                            struct stat *st, char *name,
 519                            u64 self_objectid, ino_t parent_inum,
 520                            int dir_index_cnt, struct btrfs_inode_item *inode_ret)
 521 {
 522         int ret;
 523         struct btrfs_key inode_key;
 524         struct btrfs_inode_item btrfs_inode;
 525         u64 objectid;
 526         u64 inode_size = 0;
 527         int name_len;
 528
 529         name_len = strlen(name);
 530         fill_inode_item(trans, root, &btrfs_inode, st);
 531         objectid = self_objectid;
 532
 533         if (S_ISDIR(st->st_mode)) {
 534                 inode_size = calculate_dir_inode_size(name);
 535                 btrfs_set_stack_inode_size(&btrfs_inode, inode_size);
 536         }
 537
 538         inode_key.objectid = objectid;
 539         inode_key.offset = 0;
 540         btrfs_set_key_type(&inode_key, BTRFS_INODE_ITEM_KEY);
 541
 542         ret = btrfs_insert_inode(trans, root, objectid, &btrfs_inode);
 543         if (ret)
 544                 goto fail;
 545
 546         ret = btrfs_insert_inode_ref(trans, root, name, name_len,
 547                                      objectid, parent_inum, dir_index_cnt);
 548         if (ret)
 549                 goto fail;
 550
 551         *inode_ret = btrfs_inode;
 552 fail:
 553         return ret;
 554 }
 555
 556 static int add_xattr_item(struct btrfs_trans_handle *trans,
 557                           struct btrfs_root *root, u64 objectid,
 558                           const char *file_name)
 559 {
 560         int ret;
 561         int cur_name_len;
 562         char xattr_list[XATTR_LIST_MAX];
 563         char *cur_name;
 564         char cur_value[XATTR_SIZE_MAX];
 565         char delimiter = '\0';
 566         char *next_location = xattr_list;
 567
 568         ret = llistxattr(file_name, xattr_list, XATTR_LIST_MAX);
 569         if (ret < 0) {
 570                 if(errno == ENOTSUP)
 571                         return 0;
 572                 fprintf(stderr, "get a list of xattr failed for %s\n",
 573                         file_name);
 574                 return ret;
 575         }
 576         if (ret == 0)
 577                 return ret;
 578
 579         cur_name = strtok(xattr_list, &delimiter);
 580         while (cur_name != NULL) {
 581                 cur_name_len = strlen(cur_name);
 582                 next_location += cur_name_len + 1;
 583
 584                 ret = getxattr(file_name, cur_name, cur_value, XATTR_SIZE_MAX);
 585                 if (ret < 0) {
 586                         if(errno == ENOTSUP)
 587                                 return 0;
 588                         fprintf(stderr, "get a xattr value failed for %s attr %s\n",
 589                                 file_name, cur_name);
 590                         return ret;
 591                 }
 592
 593                 ret = btrfs_insert_xattr_item(trans, root, cur_name,
 594                                               cur_name_len, cur_value,
 595                                               ret, objectid);
 596                 if (ret) {
 597                         fprintf(stderr, "insert a xattr item failed for %s\n",
 598                                 file_name);
 599                 }
 600
 601                 cur_name = strtok(next_location, &delimiter);
 602         }
 603
 604         return ret;
 605 }
 606 static int custom_alloc_extent(struct btrfs_root *root, u64 num_bytes,
 607                                u64 hint_byte, struct btrfs_key *ins)
 608 {
 609         u64 start;
 610         u64 end;
 611         u64 last = hint_byte;
 612         int ret;
 613         int wrapped = 0;
 614         struct btrfs_block_group_cache *cache;
 615
 616         while (1) {
 617                 ret = find_first_extent_bit(&root->fs_info->free_space_cache,
 618                                             last, &start, &end, EXTENT_DIRTY);
 619                 if (ret) {
 620                         if (wrapped++ == 0) {
 621                                 last = 0;
 622                                 continue;
 623                         } else {
 624                                 goto fail;
 625                         }
 626                 }
 627
 628                 start = max(last, start);
 629                 last = end + 1;
 630                 if (last - start < num_bytes)
 631                         continue;
 632
 633                 last = start + num_bytes;
 634                 if (test_range_bit(&root->fs_info->pinned_extents,
 635                                    start, last - 1, EXTENT_DIRTY, 0))
 636                         continue;
 637
 638                 cache = btrfs_lookup_block_group(root->fs_info, start);
 639                 BUG_ON(!cache);
 640                 if (cache->flags & BTRFS_BLOCK_GROUP_SYSTEM ||
 641                     last > cache->key.objectid + cache->key.offset) {
 642                         last = cache->key.objectid + cache->key.offset;
 643                         continue;
 644                 }
 645
 646                 if (cache->flags & (BTRFS_BLOCK_GROUP_SYSTEM |
 647                             BTRFS_BLOCK_GROUP_METADATA)) {
 648                         last = cache->key.objectid + cache->key.offset;
 649                         continue;
 650                 }
 651
 652                 clear_extent_dirty(&root->fs_info->free_space_cache,
 653                                    start, start + num_bytes - 1, 0);
 654
 655                 ins->objectid = start;
 656                 ins->offset = num_bytes;
 657                 ins->type = BTRFS_EXTENT_ITEM_KEY;
 658                 return 0;
 659         }
 660 fail:
 661         fprintf(stderr, "not enough free space\n");
 662         return -ENOSPC;
 663 }
 664
 665 static int record_file_extent(struct btrfs_trans_handle *trans,
 666                               struct btrfs_root *root, u64 objectid,
 667                               struct btrfs_inode_item *inode,
 668                               u64 file_pos, u64 disk_bytenr,
 669                               u64 num_bytes)
 670 {
 671         int ret;
 672         struct btrfs_fs_info *info = root->fs_info;
 673         struct btrfs_root *extent_root = info->extent_root;
 674         struct extent_buffer *leaf;
 675         struct btrfs_file_extent_item *fi;
 676         struct btrfs_key ins_key;
 677         struct btrfs_path path;
 678         struct btrfs_extent_item *ei;
 679
 680         btrfs_init_path(&path);
 681
 682         ins_key.objectid = objectid;
 683         ins_key.offset = 0;
 684         btrfs_set_key_type(&ins_key, BTRFS_EXTENT_DATA_KEY);
 685         ret = btrfs_insert_empty_item(trans, root, &path, &ins_key,
 686                                       sizeof(*fi));
 687         if (ret)
 688                 goto fail;
 689         leaf = path.nodes[0];
 690         fi = btrfs_item_ptr(leaf, path.slots[0],
 691                             struct btrfs_file_extent_item);
 692         btrfs_set_file_extent_generation(leaf, fi, trans->transid);
 693         btrfs_set_file_extent_type(leaf, fi, BTRFS_FILE_EXTENT_REG);
 694         btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
 695         btrfs_set_file_extent_disk_num_bytes(leaf, fi, num_bytes);
 696         btrfs_set_file_extent_offset(leaf, fi, 0);
 697         btrfs_set_file_extent_num_bytes(leaf, fi, num_bytes);
 698         btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes);
 699         btrfs_set_file_extent_compression(leaf, fi, 0);
 700         btrfs_set_file_extent_encryption(leaf, fi, 0);
 701         btrfs_set_file_extent_other_encoding(leaf, fi, 0);
 702         btrfs_mark_buffer_dirty(leaf);
 703
 704         btrfs_release_path(root, &path);
 705
 706         ins_key.objectid = disk_bytenr;
 707         ins_key.offset = num_bytes;
 708         ins_key.type = BTRFS_EXTENT_ITEM_KEY;
 709
 710         ret = btrfs_insert_empty_item(trans, extent_root, &path,
 711                                 &ins_key, sizeof(*ei));
 712         if (ret == 0) {
 713                 leaf = path.nodes[0];
 714                 ei = btrfs_item_ptr(leaf, path.slots[0],
 715                                     struct btrfs_extent_item);
 716
 717                 btrfs_set_extent_refs(leaf, ei, 0);
 718                 btrfs_set_extent_generation(leaf, ei, trans->transid);
 719                 btrfs_set_extent_flags(leaf, ei, BTRFS_EXTENT_FLAG_DATA);
 720
 721                 btrfs_mark_buffer_dirty(leaf);
 722                 ret = btrfs_update_block_group(trans, root, disk_bytenr,
 723                                                num_bytes, 1, 0);
 724                 if (ret)
 725                         goto fail;
 726         } else if (ret != -EEXIST) {
 727                 goto fail;
 728         }
 729
 730         ret = btrfs_inc_extent_ref(trans, root, disk_bytenr, num_bytes, 0,
 731                                    root->root_key.objectid,
 732                                    objectid, 0);
 733 fail:
 734         btrfs_release_path(root, &path);
 735         return ret;
 736 }
 737
 738 static int add_symbolic_link(struct btrfs_trans_handle *trans,
 739                              struct btrfs_root *root,
 740                              u64 objectid, const char *path_name)
 741 {
 742         int ret;
 743         u64 sectorsize = root->sectorsize;
 744         char *buf = malloc(sectorsize);
 745
 746         ret = readlink(path_name, buf, sectorsize);
 747         if (ret <= 0) {
 748                 fprintf(stderr, "readlink failed for %s\n", path_name);
 749                 goto fail;
 750         }
 751         if (ret >= sectorsize) {
 752                 fprintf(stderr, "symlink too long for %s", path_name);
 753                 ret = -1;
 754                 goto fail;
 755         }
 756
 757         buf[ret] = '\0'; /* readlink does not do it for us */
 758         ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
 759                                          buf, ret + 1);
 760 fail:
 761         free(buf);
 762         return ret;
 763 }
 764
 765 static int add_file_items(struct btrfs_trans_handle *trans,
 766                           struct btrfs_root *root,
 767                           struct btrfs_inode_item *btrfs_inode, u64 objectid,
 768                           ino_t parent_inum, struct stat *st,
 769                           const char *path_name, int out_fd)
 770 {
 771         int ret = -1;
 772         ssize_t ret_read;
 773         u64 bytes_read = 0;
 774         char *buffer = NULL;
 775         struct btrfs_key key;
 776         int blocks;
 777         u32 sectorsize = root->sectorsize;
 778         u64 first_block = 0;
 779         u64 num_blocks = 0;
 780         int fd;
 781
 782         fd = open(path_name, O_RDONLY);
 783         if (fd == -1) {
 784                 fprintf(stderr, "%s open failed\n", path_name);
 785                 return ret;
 786         }
 787
 788         blocks = st->st_size / sectorsize;
 789         if (st->st_size % sectorsize)
 790                 blocks += 1;
 791
 792         if (st->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root)) {
 793                 buffer = malloc(st->st_size);
 794                 ret_read = pread64(fd, buffer, st->st_size, bytes_read);
 795                 if (ret_read == -1) {
 796                         fprintf(stderr, "%s read failed\n", path_name);
 797                         goto end;
 798                 }
 799
 800                 ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
 801                                                  buffer, st->st_size);
 802                 goto end;
 803         }
 804
 805         ret = custom_alloc_extent(root, blocks * sectorsize, 0, &key);
 806         if (ret)
 807                 goto end;
 808
 809         first_block = key.objectid;
 810         bytes_read = 0;
 811         buffer = malloc(sectorsize);
 812
 813         do {
 814                 memset(buffer, 0, sectorsize);
 815                 ret_read = pread64(fd, buffer, sectorsize, bytes_read);
 816                 if (ret_read == -1) {
 817                         fprintf(stderr, "%s read failed\n", path_name);
 818                         goto end;
 819                 }
 820
 821                 ret = pwrite64(out_fd, buffer, sectorsize,
 822                                first_block + bytes_read);
 823                 if (ret != sectorsize) {
 824                         fprintf(stderr, "output file write failed\n");
 825                         goto end;
 826                 }
 827
 828                 /* checksum for file data */
 829                 ret = btrfs_csum_file_block(trans, root->fs_info->csum_root,
 830                                 first_block + (blocks * sectorsize),
 831                                 first_block + bytes_read,
 832                                 buffer, sectorsize);
 833                 if (ret) {
 834                         fprintf(stderr, "%s checksum failed\n", path_name);
 835                         goto end;
 836                 }
 837
 838                 bytes_read += ret_read;
 839                 num_blocks++;
 840         } while (ret_read == sectorsize);
 841
 842         if (num_blocks > 0) {
 843                 ret = record_file_extent(trans, root, objectid, btrfs_inode,
 844                                          first_block, first_block,
 845                                          blocks * sectorsize);
 846                 if (ret)
 847                         goto end;
 848         }
 849
 850 end:
 851         if (buffer)
 852                 free(buffer);
 853         close(fd);
 854         return ret;
 855 }
 856
 857 static char *make_path(char *dir, char *name)
 858 {
 859         char *path;
 860
 861         path = malloc(strlen(dir) + strlen(name) + 2);
 862         if (!path)
 863                 return NULL;
 864         strcpy(path, dir);
 865         if (dir[strlen(dir) - 1] != '/')
 866                 strcat(path, "/");
 867         strcat(path, name);
 868         return path;
 869 }
 870
 871 static int traverse_directory(struct btrfs_trans_handle *trans,
 872                               struct btrfs_root *root, char *dir_name,
 873                               struct directory_name_entry *dir_head, int out_fd)
 874 {
 875         int ret = 0;
 876
 877         struct btrfs_inode_item cur_inode;
 878         struct btrfs_inode_item *inode_item;
 879         int count, i, dir_index_cnt;
 880         struct direct **files;
 881         struct stat st;
 882         struct directory_name_entry *dir_entry, *parent_dir_entry;
 883         struct direct *cur_file;
 884         ino_t parent_inum, cur_inum;
 885         ino_t highest_inum = 0;
 886         char *parent_dir_name;
 887         struct btrfs_path path;
 888         struct extent_buffer *leaf;
 889         struct btrfs_key root_dir_key;
 890         u64 root_dir_inode_size = 0;
 891
 892         /* Add list for source directory */
 893         dir_entry = malloc(sizeof(struct directory_name_entry));
 894         dir_entry->dir_name = dir_name;
 895         dir_entry->path = strdup(dir_name);
 896
 897         parent_inum = highest_inum + BTRFS_FIRST_FREE_OBJECTID;
 898         dir_entry->inum = parent_inum;
 899         list_add_tail(&dir_entry->list, &dir_head->list);
 900
 901         btrfs_init_path(&path);
 902
 903         root_dir_key.objectid = btrfs_root_dirid(&root->root_item);
 904         root_dir_key.offset = 0;
 905         btrfs_set_key_type(&root_dir_key, BTRFS_INODE_ITEM_KEY);
 906         ret = btrfs_lookup_inode(trans, root, &path, &root_dir_key, 1);
 907         if (ret) {
 908                 fprintf(stderr, "root dir lookup error\n");
 909                 return -1;
 910         }
 911
 912         leaf = path.nodes[0];
 913         inode_item = btrfs_item_ptr(leaf, path.slots[0],
 914                                     struct btrfs_inode_item);
 915
 916         root_dir_inode_size = calculate_dir_inode_size(dir_name);
 917         btrfs_set_inode_size(leaf, inode_item, root_dir_inode_size);
 918         btrfs_mark_buffer_dirty(leaf);
 919
 920         btrfs_release_path(root, &path);
 921
 922         do {
 923                 parent_dir_entry = list_entry(dir_head->list.next,
 924                                               struct directory_name_entry,
 925                                               list);
 926                 list_del(&parent_dir_entry->list);
 927
 928                 parent_inum = parent_dir_entry->inum;
 929                 parent_dir_name = parent_dir_entry->dir_name;
 930                 if (chdir(parent_dir_entry->path)) {
 931                         fprintf(stderr, "chdir error for %s\n",
 932                                 parent_dir_name);
 933                         goto fail_no_files;
 934                 }
 935
 936                 count = scandir(parent_dir_entry->path, &files,
 937                                 directory_select, NULL);
 938                 if (count == -1)
 939                 {
 940                         fprintf(stderr, "scandir for %s failed: %s\n",
 941                                 parent_dir_name, strerror (errno));
 942                         goto fail;
 943                 }
 944
 945                 for (i = 0; i < count; i++) {
 946                         cur_file = files[i];
 947
 948                         if (lstat(cur_file->d_name, &st) == -1) {
 949                                 fprintf(stderr, "lstat failed for file %s\n",
 950                                         cur_file->d_name);
 951                                 goto fail;
 952                         }
 953
 954                         cur_inum = ++highest_inum + BTRFS_FIRST_FREE_OBJECTID;
 955                         ret = add_directory_items(trans, root,
 956                                                   cur_inum, parent_inum,
 957                                                   cur_file->d_name,
 958                                                   &st, &dir_index_cnt);
 959                         if (ret) {
 960                                 fprintf(stderr, "add_directory_items failed\n");
 961                                 goto fail;
 962                         }
 963
 964                         ret = add_inode_items(trans, root, &st,
 965                                               cur_file->d_name, cur_inum,
 966                                               parent_inum, dir_index_cnt,
 967                                               &cur_inode);
 968                         if (ret) {
 969                                 fprintf(stderr, "add_inode_items failed\n");
 970                                 goto fail;
 971                         }
 972
 973                         ret = add_xattr_item(trans, root,
 974                                              cur_inum, cur_file->d_name);
 975                         if (ret) {
 976                                 fprintf(stderr, "add_xattr_item failed\n");
 977                                 if(ret != -ENOTSUP)
 978                                         goto fail;
 979                         }
 980
 981                         if (S_ISDIR(st.st_mode)) {
 982                                 dir_entry = malloc(sizeof(struct directory_name_entry));
 983                                 dir_entry->dir_name = cur_file->d_name;
 984                                 dir_entry->path = make_path(parent_dir_entry->path,
 985                                                             cur_file->d_name);
 986                                 dir_entry->inum = cur_inum;
 987                                 list_add_tail(&dir_entry->list, &dir_head->list);
 988                         } else if (S_ISREG(st.st_mode)) {
 989                                 ret = add_file_items(trans, root, &cur_inode,
 990                                                      cur_inum, parent_inum, &st,
 991                                                      cur_file->d_name, out_fd);
 992                                 if (ret) {
 993                                         fprintf(stderr, "add_file_items failed\n");
 994                                         goto fail;
 995                                 }
 996                         } else if (S_ISLNK(st.st_mode)) {
 997                                 ret = add_symbolic_link(trans, root,
 998                                                         cur_inum, cur_file->d_name);
 999                                 if (ret) {
1000                                         fprintf(stderr, "add_symbolic_link failed\n");
1001                                         goto fail;
1002                                 }
1003                         }
1004                 }
1005
1006                 free_namelist(files, count);
1007                 free(parent_dir_entry->path);
1008                 free(parent_dir_entry);
1009
1010                 index_cnt = 2;
1011
1012         } while (!list_empty(&dir_head->list));
1013
1014         return 0;
1015 fail:
1016         free_namelist(files, count);
1017 fail_no_files:
1018         free(parent_dir_entry->path);
1019         free(parent_dir_entry);
1020         return -1;
1021 }
1022
1023 static int open_target(char *output_name)
1024 {
1025         int output_fd;
1026         output_fd = open(output_name, O_CREAT | O_RDWR | O_TRUNC,
1027                          S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
1028
1029         return output_fd;
1030 }
1031
1032 static int create_chunks(struct btrfs_trans_handle *trans,
1033                          struct btrfs_root *root, u64 num_of_meta_chunks,
1034                          u64 size_of_data)
1035 {
1036         u64 chunk_start;
1037         u64 chunk_size;
1038         u64 meta_type = BTRFS_BLOCK_GROUP_METADATA;
1039         u64 data_type = BTRFS_BLOCK_GROUP_DATA;
1040         u64 minimum_data_chunk_size = 8 * 1024 * 1024;
1041         u64 i;
1042         int ret;
1043
1044         for (i = 0; i < num_of_meta_chunks; i++) {
1045                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
1046                                         &chunk_start, &chunk_size, meta_type);
1047                 BUG_ON(ret);
1048                 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1049                                              meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1050                                              chunk_start, chunk_size);
1051                 BUG_ON(ret);
1052                 set_extent_dirty(&root->fs_info->free_space_cache,
1053                                  chunk_start, chunk_start + chunk_size - 1, 0);
1054         }
1055
1056         if (size_of_data < minimum_data_chunk_size)
1057                 size_of_data = minimum_data_chunk_size;
1058         ret = btrfs_alloc_data_chunk(trans, root->fs_info->extent_root,
1059                                      &chunk_start, size_of_data, data_type);
1060         BUG_ON(ret);
1061         ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1062                                      data_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1063                                      chunk_start, size_of_data);
1064         BUG_ON(ret);
1065         set_extent_dirty(&root->fs_info->free_space_cache,
1066                          chunk_start, chunk_start + size_of_data - 1, 0);
1067         return ret;
1068 }
1069
1070 static int make_image(char *source_dir, struct btrfs_root *root, int out_fd)
1071 {
1072         int ret;
1073         struct btrfs_trans_handle *trans;
1074
1075         struct stat root_st;
1076
1077         struct directory_name_entry dir_head;
1078
1079         ret = lstat(source_dir, &root_st);
1080         if (ret) {
1081                 fprintf(stderr, "unable to lstat the %s\n", source_dir);
1082                 goto fail;
1083         }
1084
1085         INIT_LIST_HEAD(&dir_head.list);
1086
1087         trans = btrfs_start_transaction(root, 1);
1088         ret = traverse_directory(trans, root, source_dir, &dir_head, out_fd);
1089         if (ret) {
1090                 fprintf(stderr, "unable to traverse_directory\n");
1091                 goto fail;
1092         }
1093         btrfs_commit_transaction(trans, root);
1094
1095         printf("Making image is completed.\n");
1096         return 0;
1097 fail:
1098         fprintf(stderr, "Making image is aborted.\n");
1099         return -1;
1100 }
1101
1102 /*
1103  * This ignores symlinks with unreadable targets and subdirs that can't
1104  * be read.  It's a best-effort to give a rough estimate of the size of
1105  * a subdir.  It doesn't guarantee that prepopulating btrfs from this
1106  * tree won't still run out of space.
1107  *
1108  * The rounding up to 4096 is questionable.  Previous code used du -B 4096.
1109  */
1110 static u64 global_total_size;
1111 static int ftw_add_entry_size(const char *fpath, const struct stat *st,
1112                               int type)
1113 {
1114         if (type == FTW_F || type == FTW_D)
1115                 global_total_size += round_up(st->st_size, 4096);
1116
1117         return 0;
1118 }
1119
1120 static u64 size_sourcedir(char *dir_name, u64 sectorsize,
1121                           u64 *num_of_meta_chunks_ret, u64 *size_of_data_ret)
1122 {
1123         u64 dir_size = 0;
1124         u64 total_size = 0;
1125         int ret;
1126         u64 default_chunk_size = 8 * 1024 * 1024;       /* 8MB */
1127         u64 allocated_meta_size = 8 * 1024 * 1024;      /* 8MB */
1128         u64 allocated_total_size = 20 * 1024 * 1024;    /* 20MB */
1129         u64 num_of_meta_chunks = 0;
1130         u64 num_of_allocated_meta_chunks =
1131                         allocated_meta_size / default_chunk_size;
1132
1133         global_total_size = 0;
1134         ret = ftw(dir_name, ftw_add_entry_size, 10);
1135         dir_size = global_total_size;
1136         if (ret < 0) {
1137                 fprintf(stderr, "ftw subdir walk of '%s' failed: %s\n",
1138                         dir_name, strerror(errno));
1139                 exit(1);
1140         }
1141
1142         num_of_meta_chunks = (dir_size / 2) / default_chunk_size;
1143         if (((dir_size / 2) % default_chunk_size) != 0)
1144                 num_of_meta_chunks++;
1145         if (num_of_meta_chunks <= num_of_allocated_meta_chunks)
1146                 num_of_meta_chunks = 0;
1147         else
1148                 num_of_meta_chunks -= num_of_allocated_meta_chunks;
1149
1150         total_size = allocated_total_size + dir_size +
1151                      (num_of_meta_chunks * default_chunk_size);
1152
1153         *num_of_meta_chunks_ret = num_of_meta_chunks;
1154
1155         return total_size;
1156 }
1157
1158 static int zero_output_file(int out_fd, u64 size, u32 sectorsize)
1159 {
1160         int len = sectorsize;
1161         int loop_num = size / sectorsize;
1162         u64 location = 0;
1163         char *buf = malloc(len);
1164         int ret = 0, i;
1165         ssize_t written;
1166
1167         if (!buf)
1168                 return -ENOMEM;
1169         memset(buf, 0, len);
1170         for (i = 0; i < loop_num; i++) {
1171                 written = pwrite64(out_fd, buf, len, location);
1172                 if (written != len)
1173                         ret = -EIO;
1174                 location += sectorsize;
1175         }
1176         free(buf);
1177         return ret;
1178 }
1179
1180 static int check_leaf_or_node_size(u32 size, u32 sectorsize)
1181 {
1182         if (size < sectorsize) {
1183                 fprintf(stderr,
1184                         "Illegal leafsize (or nodesize) %u (smaller than %u)\n",
1185                         size, sectorsize);
1186                 return -1;
1187         } else if (size > BTRFS_MAX_METADATA_BLOCKSIZE) {
1188                 fprintf(stderr,
1189                         "Illegal leafsize (or nodesize) %u (larger than %u)\n",
1190                         size, BTRFS_MAX_METADATA_BLOCKSIZE);
1191                 return -1;
1192         } else if (size & (sectorsize - 1)) {
1193                 fprintf(stderr,
1194                         "Illegal leafsize (or nodesize) %u (not align to %u)\n",
1195                         size, sectorsize);
1196                 return -1;
1197         }
1198         return 0;
1199 }
1200
1201 static int is_ssd(const char *file)
1202 {
1203         char *devname;
1204         blkid_probe probe;
1205         char *dev;
1206         char path[PATH_MAX];
1207         dev_t disk;
1208         int fd;
1209         char rotational;
1210
1211         probe = blkid_new_probe_from_filename(file);
1212         if (!probe)
1213                 return 0;
1214
1215         /*
1216          * We want to use blkid_devno_to_wholedisk() but it's broken for some
1217          * reason on F17 at least so we'll do this trickery
1218          */
1219         disk = blkid_probe_get_wholedisk_devno(probe);
1220         if (!disk)
1221                 return 0;
1222
1223         devname = blkid_devno_to_devname(disk);
1224         if (!devname)
1225                 return 0;
1226
1227         dev = strrchr(devname, '/');
1228         dev++;
1229
1230         snprintf(path, PATH_MAX, "/sys/block/%s/queue/rotational", dev);
1231
1232         free(devname);
1233         blkid_free_probe(probe);
1234
1235         fd = open(path, O_RDONLY);
1236         if (fd < 0) {
1237                 return 0;
1238         }
1239
1240         if (read(fd, &rotational, sizeof(char)) < sizeof(char)) {
1241                 close(fd);
1242                 return 0;
1243         }
1244         close(fd);
1245
1246         return !atoi((const char *)&rotational);
1247 }
1248
1249 int main(int ac, char **av)
1250 {
1251         char *file;
1252         struct btrfs_root *root;
1253         struct btrfs_trans_handle *trans;
1254         char *label = NULL;
1255         char *first_file;
1256         u64 block_count = 0;
1257         u64 dev_block_count = 0;
1258         u64 blocks[7];
1259         u64 alloc_start = 0;
1260         u64 metadata_profile = 0;
1261         u64 data_profile = 0;
1262         u32 leafsize = sysconf(_SC_PAGESIZE);
1263         u32 sectorsize = 4096;
1264         u32 nodesize = leafsize;
1265         u32 stripesize = 4096;
1266         int zero_end = 1;
1267         int option_index = 0;
1268         int fd;
1269         int ret;
1270         int i;
1271         int mixed = 0;
1272         int data_profile_opt = 0;
1273         int metadata_profile_opt = 0;
1274         int nodiscard = 0;
1275         int ssd = 0;
1276
1277         char *source_dir = NULL;
1278         int source_dir_set = 0;
1279         u64 num_of_meta_chunks = 0;
1280         u64 size_of_data = 0;
1281         u64 source_dir_size = 0;
1282         char *pretty_buf;
1283         struct btrfs_super_block *super;
1284         u64 flags;
1285
1286         while(1) {
1287                 int c;
1288                 c = getopt_long(ac, av, "A:b:l:n:s:m:d:L:r:VMK", long_options,
1289                                 &option_index);
1290                 if (c < 0)
1291                         break;
1292                 switch(c) {
1293                         case 'A':
1294                                 alloc_start = parse_size(optarg);
1295                                 break;
1296                         case 'd':
1297                                 data_profile = parse_profile(optarg);
1298                                 data_profile_opt = 1;
1299                                 break;
1300                         case 'l':
1301                         case 'n':
1302                                 nodesize = parse_size(optarg);
1303                                 leafsize = parse_size(optarg);
1304                                 break;
1305                         case 'L':
1306                                 label = parse_label(optarg);
1307                                 break;
1308                         case 'm':
1309                                 metadata_profile = parse_profile(optarg);
1310                                 metadata_profile_opt = 1;
1311                                 break;
1312                         case 'M':
1313                                 mixed = 1;
1314                                 break;
1315                         case 's':
1316                                 sectorsize = parse_size(optarg);
1317                                 break;
1318                         case 'b':
1319                                 block_count = parse_size(optarg);
1320                                 if (block_count <= 1024*1024*1024) {
1321                                         printf("SMALL VOLUME: forcing mixed "
1322                                                "metadata/data groups\n");
1323                                         mixed = 1;
1324                                 }
1325                                 zero_end = 0;
1326                                 break;
1327                         case 'V':
1328                                 print_version();
1329                                 break;
1330                         case 'r':
1331                                 source_dir = optarg;
1332                                 source_dir_set = 1;
1333                                 break;
1334                         case 'K':
1335                                 nodiscard=1;
1336                                 break;
1337                         default:
1338                                 print_usage();
1339                 }
1340         }
1341         sectorsize = max(sectorsize, (u32)sysconf(_SC_PAGESIZE));
1342         if (check_leaf_or_node_size(leafsize, sectorsize))
1343                 exit(1);
1344         if (check_leaf_or_node_size(nodesize, sectorsize))
1345                 exit(1);
1346         ac = ac - optind;
1347         if (ac == 0)
1348                 print_usage();
1349
1350         printf("\nWARNING! - %s IS EXPERIMENTAL\n", BTRFS_BUILD_VERSION);
1351         printf("WARNING! - see http://btrfs.wiki.kernel.org before using\n\n");
1352
1353         if (source_dir == 0) {
1354                 file = av[optind++];
1355                 ret = check_mounted(file);
1356                 if (ret < 0) {
1357                         fprintf(stderr, "error checking %s mount status\n", file);
1358                         exit(1);
1359                 }
1360                 if (ret == 1) {
1361                         fprintf(stderr, "%s is mounted\n", file);
1362                         exit(1);
1363                 }
1364                 ac--;
1365                 fd = open(file, O_RDWR);
1366                 if (fd < 0) {
1367                         fprintf(stderr, "unable to open %s\n", file);
1368                         exit(1);
1369                 }
1370                 first_file = file;
1371                 ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count,
1372                                            block_count, &mixed, nodiscard);
1373                 if (block_count && block_count > dev_block_count) {
1374                         fprintf(stderr, "%s is smaller than requested size\n", file);
1375                         exit(1);
1376                 }
1377         } else {
1378                 ac = 0;
1379                 file = av[optind++];
1380                 fd = open_target(file);
1381                 if (fd < 0) {
1382                         fprintf(stderr, "unable to open the %s\n", file);
1383                         exit(1);
1384                 }
1385
1386                 first_file = file;
1387                 source_dir_size = size_sourcedir(source_dir, sectorsize,
1388                                              &num_of_meta_chunks, &size_of_data);
1389                 if(block_count < source_dir_size)
1390                         block_count = source_dir_size;
1391                 ret = zero_output_file(fd, block_count, sectorsize);
1392                 if (ret) {
1393                         fprintf(stderr, "unable to zero the output file\n");
1394                         exit(1);
1395                 }
1396                 /* our "device" is the new image file */
1397                 dev_block_count = block_count;
1398         }
1399
1400         ssd = is_ssd(file);
1401
1402         if (mixed) {
1403                 if (metadata_profile != data_profile) {
1404                         fprintf(stderr, "With mixed block groups data and metadata "
1405                                 "profiles must be the same\n");
1406                         exit(1);
1407                 }
1408         }
1409
1410         blocks[0] = BTRFS_SUPER_INFO_OFFSET;
1411         for (i = 1; i < 7; i++) {
1412                 blocks[i] = BTRFS_SUPER_INFO_OFFSET + 1024 * 1024 +
1413                         leafsize * i;
1414         }
1415
1416         ret = make_btrfs(fd, file, label, blocks, dev_block_count,
1417                          nodesize, leafsize,
1418                          sectorsize, stripesize);
1419         if (ret) {
1420                 fprintf(stderr, "error during mkfs %d\n", ret);
1421                 exit(1);
1422         }
1423
1424         root = open_ctree(file, 0, O_RDWR);
1425         if (!root) {
1426                 fprintf(stderr, "Open ctree failed\n");
1427                 close(fd);
1428                 exit(1);
1429         }
1430         root->fs_info->alloc_start = alloc_start;
1431
1432         ret = make_root_dir(root, mixed);
1433         if (ret) {
1434                 fprintf(stderr, "failed to setup the root directory\n");
1435                 exit(1);
1436         }
1437
1438         trans = btrfs_start_transaction(root, 1);
1439
1440         if (ac == 0)
1441                 goto raid_groups;
1442
1443         btrfs_register_one_device(file);
1444
1445         zero_end = 1;
1446         while(ac-- > 0) {
1447                 int old_mixed = mixed;
1448
1449                 file = av[optind++];
1450                 ret = check_mounted(file);
1451                 if (ret < 0) {
1452                         fprintf(stderr, "error checking %s mount status\n",
1453                                 file);
1454                         exit(1);
1455                 }
1456                 if (ret == 1) {
1457                         fprintf(stderr, "%s is mounted\n", file);
1458                         exit(1);
1459                 }
1460                 fd = open(file, O_RDWR);
1461                 if (fd < 0) {
1462                         fprintf(stderr, "unable to open %s\n", file);
1463                         exit(1);
1464                 }
1465                 ret = btrfs_device_already_in_root(root, fd,
1466                                                    BTRFS_SUPER_INFO_OFFSET);
1467                 if (ret) {
1468                         fprintf(stderr, "skipping duplicate device %s in FS\n",
1469                                 file);
1470                         close(fd);
1471                         continue;
1472                 }
1473                 ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count,
1474                                            block_count, &mixed, nodiscard);
1475                 mixed = old_mixed;
1476                 BUG_ON(ret);
1477
1478                 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
1479                                         sectorsize, sectorsize, sectorsize);
1480                 BUG_ON(ret);
1481                 btrfs_register_one_device(file);
1482         }
1483
1484 raid_groups:
1485         if (!source_dir_set) {
1486                 ret = create_raid_groups(trans, root, data_profile,
1487                                  data_profile_opt, metadata_profile,
1488                                  metadata_profile_opt, mixed, ssd);
1489                 BUG_ON(ret);
1490         }
1491
1492         ret = create_data_reloc_tree(trans, root);
1493         BUG_ON(ret);
1494
1495         super = &root->fs_info->super_copy;
1496         flags = btrfs_super_incompat_flags(super);
1497         flags |= BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF;
1498
1499         if (mixed)
1500                 flags |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
1501
1502         btrfs_set_super_incompat_flags(super, flags);
1503
1504         printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
1505             "sectorsize %u size %s\n",
1506             label, first_file, nodesize, leafsize, sectorsize,
1507             pretty_buf = pretty_sizes(btrfs_super_total_bytes(&root->fs_info->super_copy)));
1508         free(pretty_buf);
1509
1510         printf("%s\n", BTRFS_BUILD_VERSION);
1511         btrfs_commit_transaction(trans, root);
1512
1513         if (source_dir_set) {
1514                 trans = btrfs_start_transaction(root, 1);
1515                 ret = create_chunks(trans, root,
1516                                     num_of_meta_chunks, size_of_data);
1517                 BUG_ON(ret);
1518                 btrfs_commit_transaction(trans, root);
1519
1520                 ret = make_image(source_dir, root, fd);
1521                 BUG_ON(ret);
1522         }
1523
1524         ret = close_ctree(root);
1525         BUG_ON(ret);
1526
1527         free(label);
1528         return 0;
1529 }
1530