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 #ifndef __CHECKER__
  23 #include <sys/ioctl.h>
  24 #include <sys/mount.h>
  25 #include "ioctl.h"
  26 #endif
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <sys/types.h>
  31 #include <sys/stat.h>
  32 #include <sys/dir.h>
  33 #include <fcntl.h>
  34 #include <unistd.h>
  35 #include <getopt.h>
  36 #include <uuid/uuid.h>
  37 #include <linux/fs.h>
  38 #include <ctype.h>
  39 #include <attr/xattr.h>
  40 #include "kerncompat.h"
  41 #include "ctree.h"
  42 #include "disk-io.h"
  43 #include "volumes.h"
  44 #include "transaction.h"
  45 #include "utils.h"
  46 #include "version.h"
  47
  48 static u64 index_cnt = 2;
  49
  50 struct directory_name_entry {
  51         char *dir_name;
  52         char *path;
  53         ino_t inum;
  54         struct list_head list;
  55 };
  56
  57 static u64 parse_size(char *s)
  58 {
  59         int len = strlen(s);
  60         char c;
  61         u64 mult = 1;
  62
  63         if (!isdigit(s[len - 1])) {
  64                 c = tolower(s[len - 1]);
  65                 switch (c) {
  66                 case 'g':
  67                         mult *= 1024;
  68                 case 'm':
  69                         mult *= 1024;
  70                 case 'k':
  71                         mult *= 1024;
  72                 case 'b':
  73                         break;
  74                 default:
  75                         fprintf(stderr, "Unknown size descriptor %c\n", c);
  76                         exit(1);
  77                 }
  78                 s[len - 1] = '\0';
  79         }
  80         return atol(s) * mult;
  81 }
  82
  83 static int make_root_dir(struct btrfs_root *root, int mixed)
  84 {
  85         struct btrfs_trans_handle *trans;
  86         struct btrfs_key location;
  87         u64 bytes_used;
  88         u64 chunk_start = 0;
  89         u64 chunk_size = 0;
  90         int ret;
  91
  92         trans = btrfs_start_transaction(root, 1);
  93         bytes_used = btrfs_super_bytes_used(&root->fs_info->super_copy);
  94
  95         root->fs_info->system_allocs = 1;
  96         ret = btrfs_make_block_group(trans, root, bytes_used,
  97                                      BTRFS_BLOCK_GROUP_SYSTEM,
  98                                      BTRFS_FIRST_CHUNK_TREE_OBJECTID,
  99                                      0, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
 100         BUG_ON(ret);
 101
 102         if (mixed) {
 103                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 104                                         &chunk_start, &chunk_size,
 105                                         BTRFS_BLOCK_GROUP_METADATA |
 106                                         BTRFS_BLOCK_GROUP_DATA);
 107                 BUG_ON(ret);
 108                 ret = btrfs_make_block_group(trans, root, 0,
 109                                              BTRFS_BLOCK_GROUP_METADATA |
 110                                              BTRFS_BLOCK_GROUP_DATA,
 111                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 112                                              chunk_start, chunk_size);
 113                 BUG_ON(ret);
 114                 printf("Created a data/metadata chunk of size %llu\n", chunk_size);
 115         } else {
 116                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 117                                         &chunk_start, &chunk_size,
 118                                         BTRFS_BLOCK_GROUP_METADATA);
 119                 BUG_ON(ret);
 120                 ret = btrfs_make_block_group(trans, root, 0,
 121                                              BTRFS_BLOCK_GROUP_METADATA,
 122                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 123                                              chunk_start, chunk_size);
 124                 BUG_ON(ret);
 125         }
 126
 127         root->fs_info->system_allocs = 0;
 128         btrfs_commit_transaction(trans, root);
 129         trans = btrfs_start_transaction(root, 1);
 130         BUG_ON(!trans);
 131
 132         if (!mixed) {
 133                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 134                                         &chunk_start, &chunk_size,
 135                                         BTRFS_BLOCK_GROUP_DATA);
 136                 BUG_ON(ret);
 137                 ret = btrfs_make_block_group(trans, root, 0,
 138                                              BTRFS_BLOCK_GROUP_DATA,
 139                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 140                                              chunk_start, chunk_size);
 141                 BUG_ON(ret);
 142         }
 143
 144         ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
 145                               BTRFS_ROOT_TREE_DIR_OBJECTID);
 146         if (ret)
 147                 goto err;
 148         ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
 149         if (ret)
 150                 goto err;
 151         memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
 152         location.offset = (u64)-1;
 153         ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
 154                         "default", 7,
 155                         btrfs_super_root_dir(&root->fs_info->super_copy),
 156                         &location, BTRFS_FT_DIR, 0);
 157         if (ret)
 158                 goto err;
 159
 160         ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
 161                              "default", 7, location.objectid,
 162                              BTRFS_ROOT_TREE_DIR_OBJECTID, 0);
 163         if (ret)
 164                 goto err;
 165
 166         btrfs_commit_transaction(trans, root);
 167 err:
 168         return ret;
 169 }
 170
 171 static int recow_roots(struct btrfs_trans_handle *trans,
 172                        struct btrfs_root *root)
 173 {
 174         int ret;
 175         struct extent_buffer *tmp;
 176         struct btrfs_fs_info *info = root->fs_info;
 177
 178         ret = __btrfs_cow_block(trans, info->fs_root, info->fs_root->node,
 179                                 NULL, 0, &tmp, 0, 0);
 180         BUG_ON(ret);
 181         free_extent_buffer(tmp);
 182
 183         ret = __btrfs_cow_block(trans, info->tree_root, info->tree_root->node,
 184                                 NULL, 0, &tmp, 0, 0);
 185         BUG_ON(ret);
 186         free_extent_buffer(tmp);
 187
 188         ret = __btrfs_cow_block(trans, info->extent_root,
 189                                 info->extent_root->node, NULL, 0, &tmp, 0, 0);
 190         BUG_ON(ret);
 191         free_extent_buffer(tmp);
 192
 193         ret = __btrfs_cow_block(trans, info->chunk_root, info->chunk_root->node,
 194                                 NULL, 0, &tmp, 0, 0);
 195         BUG_ON(ret);
 196         free_extent_buffer(tmp);
 197
 198
 199         ret = __btrfs_cow_block(trans, info->dev_root, info->dev_root->node,
 200                                 NULL, 0, &tmp, 0, 0);
 201         BUG_ON(ret);
 202         free_extent_buffer(tmp);
 203
 204         ret = __btrfs_cow_block(trans, info->csum_root, info->csum_root->node,
 205                                 NULL, 0, &tmp, 0, 0);
 206         BUG_ON(ret);
 207         free_extent_buffer(tmp);
 208
 209         return 0;
 210 }
 211
 212 static int create_one_raid_group(struct btrfs_trans_handle *trans,
 213                               struct btrfs_root *root, u64 type)
 214 {
 215         u64 chunk_start;
 216         u64 chunk_size;
 217         int ret;
 218
 219         ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 220                                 &chunk_start, &chunk_size, type);
 221         BUG_ON(ret);
 222         ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
 223                                      type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 224                                      chunk_start, chunk_size);
 225         BUG_ON(ret);
 226         return ret;
 227 }
 228
 229 static int create_raid_groups(struct btrfs_trans_handle *trans,
 230                               struct btrfs_root *root, u64 data_profile,
 231                               u64 metadata_profile, int mixed)
 232 {
 233         u64 num_devices = btrfs_super_num_devices(&root->fs_info->super_copy);
 234         u64 allowed;
 235         int ret;
 236
 237         if (num_devices == 1)
 238                 allowed = BTRFS_BLOCK_GROUP_DUP;
 239         else if (num_devices >= 4) {
 240                 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
 241                         BTRFS_BLOCK_GROUP_RAID10;
 242         } else
 243                 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1;
 244
 245         if (allowed & metadata_profile) {
 246                 u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA;
 247
 248                 ret = create_one_raid_group(trans, root,
 249                                             BTRFS_BLOCK_GROUP_SYSTEM |
 250                                             (allowed & metadata_profile));
 251                 BUG_ON(ret);
 252
 253                 if (mixed)
 254                         meta_flags |= BTRFS_BLOCK_GROUP_DATA;
 255
 256                 ret = create_one_raid_group(trans, root, meta_flags |
 257                                             (allowed & metadata_profile));
 258                 BUG_ON(ret);
 259
 260                 ret = recow_roots(trans, root);
 261                 BUG_ON(ret);
 262         }
 263         if (!mixed && num_devices > 1 && (allowed & data_profile)) {
 264                 ret = create_one_raid_group(trans, root,
 265                                             BTRFS_BLOCK_GROUP_DATA |
 266                                             (allowed & data_profile));
 267                 BUG_ON(ret);
 268         }
 269         return 0;
 270 }
 271
 272 static int create_data_reloc_tree(struct btrfs_trans_handle *trans,
 273                                   struct btrfs_root *root)
 274 {
 275         struct btrfs_key location;
 276         struct btrfs_root_item root_item;
 277         struct extent_buffer *tmp;
 278         u64 objectid = BTRFS_DATA_RELOC_TREE_OBJECTID;
 279         int ret;
 280
 281         ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
 282         BUG_ON(ret);
 283
 284         memcpy(&root_item, &root->root_item, sizeof(root_item));
 285         btrfs_set_root_bytenr(&root_item, tmp->start);
 286         btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
 287         btrfs_set_root_generation(&root_item, trans->transid);
 288         free_extent_buffer(tmp);
 289
 290         location.objectid = objectid;
 291         location.type = BTRFS_ROOT_ITEM_KEY;
 292         location.offset = 0;
 293         ret = btrfs_insert_root(trans, root->fs_info->tree_root,
 294                                 &location, &root_item);
 295         BUG_ON(ret);
 296         return 0;
 297 }
 298
 299 static void print_usage(void)
 300 {
 301         fprintf(stderr, "usage: mkfs.btrfs [options] dev [ dev ... ]\n");
 302         fprintf(stderr, "options:\n");
 303         fprintf(stderr, "\t -A --alloc-start the offset to start the FS\n");
 304         fprintf(stderr, "\t -b --byte-count total number of bytes in the FS\n");
 305         fprintf(stderr, "\t -d --data data profile, raid0, raid1, raid10 or single\n");
 306         fprintf(stderr, "\t -l --leafsize size of btree leaves\n");
 307         fprintf(stderr, "\t -L --label set a label\n");
 308         fprintf(stderr, "\t -m --metadata metadata profile, values like data profile\n");
 309         fprintf(stderr, "\t -M --mixed mix metadata and data together\n");
 310         fprintf(stderr, "\t -n --nodesize size of btree nodes\n");
 311         fprintf(stderr, "\t -s --sectorsize min block allocation\n");
 312         fprintf(stderr, "\t -r --rootdir the source directory\n");
 313         fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
 314         exit(1);
 315 }
 316
 317 static void print_version(void)
 318 {
 319         fprintf(stderr, "mkfs.btrfs, part of %s\n", BTRFS_BUILD_VERSION);
 320         exit(0);
 321 }
 322
 323 static u64 parse_profile(char *s)
 324 {
 325         if (strcmp(s, "raid0") == 0) {
 326                 return BTRFS_BLOCK_GROUP_RAID0;
 327         } else if (strcmp(s, "raid1") == 0) {
 328                 return BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_DUP;
 329         } else if (strcmp(s, "raid10") == 0) {
 330                 return BTRFS_BLOCK_GROUP_RAID10 | BTRFS_BLOCK_GROUP_DUP;
 331         } else if (strcmp(s, "single") == 0) {
 332                 return 0;
 333         } else {
 334                 fprintf(stderr, "Unknown option %s\n", s);
 335                 print_usage();
 336         }
 337         return 0;
 338 }
 339
 340 static char *parse_label(char *input)
 341 {
 342         int i;
 343         int len = strlen(input);
 344
 345         if (len >= BTRFS_LABEL_SIZE) {
 346                 fprintf(stderr, "Label %s is too long (max %d)\n", input,
 347                         BTRFS_LABEL_SIZE - 1);
 348                 exit(1);
 349         }
 350         for (i = 0; i < len; i++) {
 351                 if (input[i] == '/' || input[i] == '\\') {
 352                         fprintf(stderr, "invalid label %s\n", input);
 353                         exit(1);
 354                 }
 355         }
 356         return strdup(input);
 357 }
 358
 359 static struct option long_options[] = {
 360         { "alloc-start", 1, NULL, 'A'},
 361         { "byte-count", 1, NULL, 'b' },
 362         { "leafsize", 1, NULL, 'l' },
 363         { "label", 1, NULL, 'L'},
 364         { "metadata", 1, NULL, 'm' },
 365         { "mixed", 0, NULL, 'M' },
 366         { "nodesize", 1, NULL, 'n' },
 367         { "sectorsize", 1, NULL, 's' },
 368         { "data", 1, NULL, 'd' },
 369         { "version", 0, NULL, 'V' },
 370         { "rootdir", 1, NULL, 'r' },
 371         { 0, 0, 0, 0}
 372 };
 373
 374 static int add_directory_items(struct btrfs_trans_handle *trans,
 375                                struct btrfs_root *root, u64 objectid,
 376                                ino_t parent_inum, const char *name,
 377                                struct stat *st, int *dir_index_cnt)
 378 {
 379         int ret;
 380         int name_len;
 381         struct btrfs_key location;
 382         u8 filetype = 0;
 383
 384         name_len = strlen(name);
 385
 386         location.objectid = objectid;
 387         location.offset = 0;
 388         btrfs_set_key_type(&location, BTRFS_INODE_ITEM_KEY);
 389
 390         if (S_ISDIR(st->st_mode))
 391                 filetype = BTRFS_FT_DIR;
 392         if (S_ISREG(st->st_mode))
 393                 filetype = BTRFS_FT_REG_FILE;
 394         if (S_ISLNK(st->st_mode))
 395                 filetype = BTRFS_FT_SYMLINK;
 396
 397         ret = btrfs_insert_dir_item(trans, root, name, name_len,
 398                                     parent_inum, &location,
 399                                     filetype, index_cnt);
 400
 401         *dir_index_cnt = index_cnt;
 402         index_cnt++;
 403
 404         return ret;
 405 }
 406
 407 static int fill_inode_item(struct btrfs_trans_handle *trans,
 408                            struct btrfs_root *root,
 409                            struct btrfs_inode_item *dst, struct stat *src)
 410 {
 411         u64 blocks = 0;
 412         u64 sectorsize = root->sectorsize;
 413
 414         /*
 415          * btrfs_inode_item has some reserved fields
 416          * and represents on-disk inode entry, so
 417          * zero everything to prevent information leak
 418          */
 419         memset(dst, 0, sizeof (*dst));
 420
 421         btrfs_set_stack_inode_generation(dst, trans->transid);
 422         btrfs_set_stack_inode_size(dst, src->st_size);
 423         btrfs_set_stack_inode_nbytes(dst, 0);
 424         btrfs_set_stack_inode_block_group(dst, 0);
 425         btrfs_set_stack_inode_nlink(dst, src->st_nlink);
 426         btrfs_set_stack_inode_uid(dst, src->st_uid);
 427         btrfs_set_stack_inode_gid(dst, src->st_gid);
 428         btrfs_set_stack_inode_mode(dst, src->st_mode);
 429         btrfs_set_stack_inode_rdev(dst, 0);
 430         btrfs_set_stack_inode_flags(dst, 0);
 431         btrfs_set_stack_timespec_sec(&dst->atime, src->st_atime);
 432         btrfs_set_stack_timespec_nsec(&dst->atime, 0);
 433         btrfs_set_stack_timespec_sec(&dst->ctime, src->st_ctime);
 434         btrfs_set_stack_timespec_nsec(&dst->ctime, 0);
 435         btrfs_set_stack_timespec_sec(&dst->mtime, src->st_mtime);
 436         btrfs_set_stack_timespec_nsec(&dst->mtime, 0);
 437         btrfs_set_stack_timespec_sec(&dst->otime, 0);
 438         btrfs_set_stack_timespec_nsec(&dst->otime, 0);
 439
 440         if (S_ISDIR(src->st_mode)) {
 441                 btrfs_set_stack_inode_size(dst, 0);
 442                 btrfs_set_stack_inode_nlink(dst, 1);
 443         }
 444         if (S_ISREG(src->st_mode)) {
 445                 btrfs_set_stack_inode_size(dst, (u64)src->st_size);
 446                 if (src->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root))
 447                         btrfs_set_stack_inode_nbytes(dst, src->st_size);
 448                 else {
 449                         blocks = src->st_size / sectorsize;
 450                         if (src->st_size % sectorsize)
 451                                 blocks += 1;
 452                         blocks *= sectorsize;
 453                         btrfs_set_stack_inode_nbytes(dst, blocks);
 454                 }
 455         }
 456         if (S_ISLNK(src->st_mode))
 457                 btrfs_set_stack_inode_nbytes(dst, src->st_size + 1);
 458
 459         return 0;
 460 }
 461
 462 static int directory_select(const struct direct *entry)
 463 {
 464         if ((strncmp(entry->d_name, ".", entry->d_reclen) == 0) ||
 465                 (strncmp(entry->d_name, "..", entry->d_reclen) == 0))
 466                 return 0;
 467         else
 468                 return 1;
 469 }
 470
 471 static void free_namelist(struct direct **files, int count)
 472 {
 473         int i;
 474
 475         if (count < 0)
 476                 return;
 477
 478         for (i = 0; i < count; ++i)
 479                 free(files[i]);
 480         free(files);
 481 }
 482
 483 static u64 calculate_dir_inode_size(char *dirname)
 484 {
 485         int count, i;
 486         struct direct **files, *cur_file;
 487         u64 dir_inode_size = 0;
 488
 489         count = scandir(dirname, &files, directory_select, NULL);
 490
 491         for (i = 0; i < count; i++) {
 492                 cur_file = files[i];
 493                 dir_inode_size += strlen(cur_file->d_name);
 494         }
 495
 496         free_namelist(files, count);
 497
 498         dir_inode_size *= 2;
 499         return dir_inode_size;
 500 }
 501
 502 static int add_inode_items(struct btrfs_trans_handle *trans,
 503                            struct btrfs_root *root,
 504                            struct stat *st, char *name,
 505                            u64 self_objectid, ino_t parent_inum,
 506                            int dir_index_cnt, struct btrfs_inode_item *inode_ret)
 507 {
 508         int ret;
 509         struct btrfs_key inode_key;
 510         struct btrfs_inode_item btrfs_inode;
 511         u64 objectid;
 512         u64 inode_size = 0;
 513         int name_len;
 514
 515         name_len = strlen(name);
 516         fill_inode_item(trans, root, &btrfs_inode, st);
 517         objectid = self_objectid;
 518
 519         if (S_ISDIR(st->st_mode)) {
 520                 inode_size = calculate_dir_inode_size(name);
 521                 btrfs_set_stack_inode_size(&btrfs_inode, inode_size);
 522         }
 523
 524         inode_key.objectid = objectid;
 525         inode_key.offset = 0;
 526         btrfs_set_key_type(&inode_key, BTRFS_INODE_ITEM_KEY);
 527
 528         ret = btrfs_insert_inode(trans, root, objectid, &btrfs_inode);
 529         if (ret)
 530                 goto fail;
 531
 532         ret = btrfs_insert_inode_ref(trans, root, name, name_len,
 533                                      objectid, parent_inum, dir_index_cnt);
 534         if (ret)
 535                 goto fail;
 536
 537         *inode_ret = btrfs_inode;
 538 fail:
 539         return ret;
 540 }
 541
 542 static int add_xattr_item(struct btrfs_trans_handle *trans,
 543                           struct btrfs_root *root, u64 objectid,
 544                           const char *file_name)
 545 {
 546         int ret;
 547         int cur_name_len;
 548         char xattr_list[XATTR_LIST_MAX];
 549         char *cur_name;
 550         char cur_value[XATTR_SIZE_MAX];
 551         char delimiter = '\0';
 552         char *next_location = xattr_list;
 553
 554         ret = llistxattr(file_name, xattr_list, XATTR_LIST_MAX);
 555         if (ret < 0) {
 556                 if(errno == ENOTSUP)
 557                         return 0;
 558                 fprintf(stderr, "get a list of xattr failed for %s\n",
 559                         file_name);
 560                 return ret;
 561         }
 562         if (ret == 0)
 563                 return ret;
 564
 565         cur_name = strtok(xattr_list, &delimiter);
 566         while (cur_name != NULL) {
 567                 cur_name_len = strlen(cur_name);
 568                 next_location += cur_name_len + 1;
 569
 570                 ret = getxattr(file_name, cur_name, cur_value, XATTR_SIZE_MAX);
 571                 if (ret < 0) {
 572                         if(errno == ENOTSUP)
 573                                 return 0;
 574                         fprintf(stderr, "get a xattr value failed for %s attr %s\n",
 575                                 file_name, cur_name);
 576                         return ret;
 577                 }
 578
 579                 ret = btrfs_insert_xattr_item(trans, root, cur_name,
 580                                               cur_name_len, cur_value,
 581                                               ret, objectid);
 582                 if (ret) {
 583                         fprintf(stderr, "insert a xattr item failed for %s\n",
 584                                 file_name);
 585                 }
 586
 587                 cur_name = strtok(next_location, &delimiter);
 588         }
 589
 590         return ret;
 591 }
 592 static int custom_alloc_extent(struct btrfs_root *root, u64 num_bytes,
 593                                u64 hint_byte, struct btrfs_key *ins)
 594 {
 595         u64 start;
 596         u64 end;
 597         u64 last = hint_byte;
 598         int ret;
 599         int wrapped = 0;
 600         struct btrfs_block_group_cache *cache;
 601
 602         while (1) {
 603                 ret = find_first_extent_bit(&root->fs_info->free_space_cache,
 604                                             last, &start, &end, EXTENT_DIRTY);
 605                 if (ret) {
 606                         if (wrapped++ == 0) {
 607                                 last = 0;
 608                                 continue;
 609                         } else {
 610                                 goto fail;
 611                         }
 612                 }
 613
 614                 start = max(last, start);
 615                 last = end + 1;
 616                 if (last - start < num_bytes)
 617                         continue;
 618
 619                 last = start + num_bytes;
 620                 if (test_range_bit(&root->fs_info->pinned_extents,
 621                                    start, last - 1, EXTENT_DIRTY, 0))
 622                         continue;
 623
 624                 cache = btrfs_lookup_block_group(root->fs_info, start);
 625                 BUG_ON(!cache);
 626                 if (cache->flags & BTRFS_BLOCK_GROUP_SYSTEM ||
 627                     last > cache->key.objectid + cache->key.offset) {
 628                         last = cache->key.objectid + cache->key.offset;
 629                         continue;
 630                 }
 631
 632                 if (cache->flags & (BTRFS_BLOCK_GROUP_SYSTEM |
 633                             BTRFS_BLOCK_GROUP_METADATA)) {
 634                         last = cache->key.objectid + cache->key.offset;
 635                         continue;
 636                 }
 637
 638                 clear_extent_dirty(&root->fs_info->free_space_cache,
 639                                    start, start + num_bytes - 1, 0);
 640
 641                 ins->objectid = start;
 642                 ins->offset = num_bytes;
 643                 ins->type = BTRFS_EXTENT_ITEM_KEY;
 644                 return 0;
 645         }
 646 fail:
 647         fprintf(stderr, "not enough free space\n");
 648         return -ENOSPC;
 649 }
 650
 651 static int record_file_extent(struct btrfs_trans_handle *trans,
 652                               struct btrfs_root *root, u64 objectid,
 653                               struct btrfs_inode_item *inode,
 654                               u64 file_pos, u64 disk_bytenr,
 655                               u64 num_bytes)
 656 {
 657         int ret;
 658         struct btrfs_fs_info *info = root->fs_info;
 659         struct btrfs_root *extent_root = info->extent_root;
 660         struct extent_buffer *leaf;
 661         struct btrfs_file_extent_item *fi;
 662         struct btrfs_key ins_key;
 663         struct btrfs_path path;
 664         struct btrfs_extent_item *ei;
 665
 666         btrfs_init_path(&path);
 667
 668         ins_key.objectid = objectid;
 669         ins_key.offset = 0;
 670         btrfs_set_key_type(&ins_key, BTRFS_EXTENT_DATA_KEY);
 671         ret = btrfs_insert_empty_item(trans, root, &path, &ins_key,
 672                                       sizeof(*fi));
 673         if (ret)
 674                 goto fail;
 675         leaf = path.nodes[0];
 676         fi = btrfs_item_ptr(leaf, path.slots[0],
 677                             struct btrfs_file_extent_item);
 678         btrfs_set_file_extent_generation(leaf, fi, trans->transid);
 679         btrfs_set_file_extent_type(leaf, fi, BTRFS_FILE_EXTENT_REG);
 680         btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
 681         btrfs_set_file_extent_disk_num_bytes(leaf, fi, num_bytes);
 682         btrfs_set_file_extent_offset(leaf, fi, 0);
 683         btrfs_set_file_extent_num_bytes(leaf, fi, num_bytes);
 684         btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes);
 685         btrfs_set_file_extent_compression(leaf, fi, 0);
 686         btrfs_set_file_extent_encryption(leaf, fi, 0);
 687         btrfs_set_file_extent_other_encoding(leaf, fi, 0);
 688         btrfs_mark_buffer_dirty(leaf);
 689
 690         btrfs_release_path(root, &path);
 691
 692         ins_key.objectid = disk_bytenr;
 693         ins_key.offset = num_bytes;
 694         ins_key.type = BTRFS_EXTENT_ITEM_KEY;
 695
 696         ret = btrfs_insert_empty_item(trans, extent_root, &path,
 697                                 &ins_key, sizeof(*ei));
 698         if (ret == 0) {
 699                 leaf = path.nodes[0];
 700                 ei = btrfs_item_ptr(leaf, path.slots[0],
 701                                     struct btrfs_extent_item);
 702
 703                 btrfs_set_extent_refs(leaf, ei, 0);
 704                 btrfs_set_extent_generation(leaf, ei, trans->transid);
 705                 btrfs_set_extent_flags(leaf, ei, BTRFS_EXTENT_FLAG_DATA);
 706
 707                 btrfs_mark_buffer_dirty(leaf);
 708                 ret = btrfs_update_block_group(trans, root, disk_bytenr,
 709                                                num_bytes, 1, 0);
 710                 if (ret)
 711                         goto fail;
 712         } else if (ret != -EEXIST) {
 713                 goto fail;
 714         }
 715
 716         ret = btrfs_inc_extent_ref(trans, root, disk_bytenr, num_bytes, 0,
 717                                    root->root_key.objectid,
 718                                    objectid, 0);
 719 fail:
 720         btrfs_release_path(root, &path);
 721         return ret;
 722 }
 723
 724 static int add_symbolic_link(struct btrfs_trans_handle *trans,
 725                              struct btrfs_root *root,
 726                              u64 objectid, const char *path_name)
 727 {
 728         int ret;
 729         u64 sectorsize = root->sectorsize;
 730         char *buf = malloc(sectorsize);
 731
 732         ret = readlink(path_name, buf, sectorsize);
 733         if (ret <= 0) {
 734                 fprintf(stderr, "readlink failed for %s\n", path_name);
 735                 goto fail;
 736         }
 737         if (ret >= sectorsize) {
 738                 fprintf(stderr, "symlink too long for %s", path_name);
 739                 ret = -1;
 740                 goto fail;
 741         }
 742
 743         buf[ret] = '\0'; /* readlink does not do it for us */
 744         ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
 745                                          buf, ret + 1);
 746 fail:
 747         free(buf);
 748         return ret;
 749 }
 750
 751 static int add_file_items(struct btrfs_trans_handle *trans,
 752                           struct btrfs_root *root,
 753                           struct btrfs_inode_item *btrfs_inode, u64 objectid,
 754                           ino_t parent_inum, struct stat *st,
 755                           const char *path_name, int out_fd)
 756 {
 757         int ret = -1;
 758         ssize_t ret_read;
 759         u64 bytes_read = 0;
 760         char *buffer = NULL;
 761         struct btrfs_key key;
 762         int blocks;
 763         u32 sectorsize = root->sectorsize;
 764         u64 first_block = 0;
 765         u64 num_blocks = 0;
 766         int fd;
 767
 768         fd = open(path_name, O_RDONLY);
 769         if (fd == -1) {
 770                 fprintf(stderr, "%s open failed\n", path_name);
 771                 goto end;
 772         }
 773
 774         blocks = st->st_size / sectorsize;
 775         if (st->st_size % sectorsize)
 776                 blocks += 1;
 777
 778         if (st->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root)) {
 779                 buffer = malloc(st->st_size);
 780                 ret_read = pread64(fd, buffer, st->st_size, bytes_read);
 781                 if (ret_read == -1) {
 782                         fprintf(stderr, "%s read failed\n", path_name);
 783                         goto end;
 784                 }
 785
 786                 ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
 787                                                  buffer, st->st_size);
 788                 goto end;
 789         }
 790
 791         ret = custom_alloc_extent(root, blocks * sectorsize, 0, &key);
 792         if (ret)
 793                 goto end;
 794
 795         first_block = key.objectid;
 796         bytes_read = 0;
 797         buffer = malloc(sectorsize);
 798
 799         do {
 800                 memset(buffer, 0, sectorsize);
 801                 ret_read = pread64(fd, buffer, sectorsize, bytes_read);
 802                 if (ret_read == -1) {
 803                         fprintf(stderr, "%s read failed\n", path_name);
 804                         goto end;
 805                 }
 806
 807                 ret = pwrite64(out_fd, buffer, sectorsize,
 808                                first_block + bytes_read);
 809                 if (ret != sectorsize) {
 810                         fprintf(stderr, "output file write failed\n");
 811                         goto end;
 812                 }
 813
 814                 /* checksum for file data */
 815                 ret = btrfs_csum_file_block(trans, root->fs_info->csum_root,
 816                                 first_block + (blocks * sectorsize),
 817                                 first_block + bytes_read,
 818                                 buffer, sectorsize);
 819                 if (ret) {
 820                         fprintf(stderr, "%s checksum failed\n", path_name);
 821                         goto end;
 822                 }
 823
 824                 bytes_read += ret_read;
 825                 num_blocks++;
 826         } while (ret_read == sectorsize);
 827
 828         if (num_blocks > 0) {
 829                 ret = record_file_extent(trans, root, objectid, btrfs_inode,
 830                                          first_block, first_block,
 831                                          blocks * sectorsize);
 832                 if (ret)
 833                         goto end;
 834         }
 835
 836 end:
 837         if (buffer)
 838                 free(buffer);
 839         close(fd);
 840         return ret;
 841 }
 842
 843 static char *make_path(char *dir, char *name)
 844 {
 845         char *path;
 846
 847         path = malloc(strlen(dir) + strlen(name) + 2);
 848         if (!path)
 849                 return NULL;
 850         strcpy(path, dir);
 851         if (dir[strlen(dir) - 1] != '/')
 852                 strcat(path, "/");
 853         strcat(path, name);
 854         return path;
 855 }
 856
 857 static int traverse_directory(struct btrfs_trans_handle *trans,
 858                               struct btrfs_root *root, char *dir_name,
 859                               struct directory_name_entry *dir_head, int out_fd)
 860 {
 861         int ret = 0;
 862
 863         struct btrfs_inode_item cur_inode;
 864         struct btrfs_inode_item *inode_item;
 865         int count, i, dir_index_cnt;
 866         struct direct **files;
 867         struct stat st;
 868         struct directory_name_entry *dir_entry, *parent_dir_entry;
 869         struct direct *cur_file;
 870         ino_t parent_inum, cur_inum;
 871         ino_t highest_inum = 0;
 872         char *parent_dir_name;
 873         struct btrfs_path path;
 874         struct extent_buffer *leaf;
 875         struct btrfs_key root_dir_key;
 876         u64 root_dir_inode_size = 0;
 877
 878         /* Add list for source directory */
 879         dir_entry = malloc(sizeof(struct directory_name_entry));
 880         dir_entry->dir_name = dir_name;
 881         dir_entry->path = malloc(strlen(dir_name) + 1);
 882         strcpy(dir_entry->path, dir_name);
 883
 884         parent_inum = highest_inum + BTRFS_FIRST_FREE_OBJECTID;
 885         dir_entry->inum = parent_inum;
 886         list_add_tail(&dir_entry->list, &dir_head->list);
 887
 888         btrfs_init_path(&path);
 889
 890         root_dir_key.objectid = btrfs_root_dirid(&root->root_item);
 891         root_dir_key.offset = 0;
 892         btrfs_set_key_type(&root_dir_key, BTRFS_INODE_ITEM_KEY);
 893         ret = btrfs_lookup_inode(trans, root, &path, &root_dir_key, 1);
 894         if (ret) {
 895                 fprintf(stderr, "root dir lookup error\n");
 896                 return -1;
 897         }
 898
 899         leaf = path.nodes[0];
 900         inode_item = btrfs_item_ptr(leaf, path.slots[0],
 901                                     struct btrfs_inode_item);
 902
 903         root_dir_inode_size = calculate_dir_inode_size(dir_name);
 904         btrfs_set_inode_size(leaf, inode_item, root_dir_inode_size);
 905         btrfs_mark_buffer_dirty(leaf);
 906
 907         btrfs_release_path(root, &path);
 908
 909         do {
 910                 parent_dir_entry = list_entry(dir_head->list.next,
 911                                               struct directory_name_entry,
 912                                               list);
 913                 list_del(&parent_dir_entry->list);
 914
 915                 parent_inum = parent_dir_entry->inum;
 916                 parent_dir_name = parent_dir_entry->dir_name;
 917                 if (chdir(parent_dir_entry->path)) {
 918                         fprintf(stderr, "chdir error for %s\n",
 919                                 parent_dir_name);
 920                         goto fail_no_files;
 921                 }
 922
 923                 count = scandir(parent_dir_entry->path, &files,
 924                                 directory_select, NULL);
 925                 if (count == -1)
 926                 {
 927                         fprintf(stderr, "scandir for %s failed: %s\n",
 928                                 parent_dir_name, strerror (errno));
 929                         goto fail;
 930                 }
 931
 932                 for (i = 0; i < count; i++) {
 933                         cur_file = files[i];
 934
 935                         if (lstat(cur_file->d_name, &st) == -1) {
 936                                 fprintf(stderr, "lstat failed for file %s\n",
 937                                         cur_file->d_name);
 938                                 goto fail;
 939                         }
 940
 941                         cur_inum = ++highest_inum + BTRFS_FIRST_FREE_OBJECTID;
 942                         ret = add_directory_items(trans, root,
 943                                                   cur_inum, parent_inum,
 944                                                   cur_file->d_name,
 945                                                   &st, &dir_index_cnt);
 946                         if (ret) {
 947                                 fprintf(stderr, "add_directory_items failed\n");
 948                                 goto fail;
 949                         }
 950
 951                         ret = add_inode_items(trans, root, &st,
 952                                               cur_file->d_name, cur_inum,
 953                                               parent_inum, dir_index_cnt,
 954                                               &cur_inode);
 955                         if (ret) {
 956                                 fprintf(stderr, "add_inode_items failed\n");
 957                                 goto fail;
 958                         }
 959
 960                         ret = add_xattr_item(trans, root,
 961                                              cur_inum, cur_file->d_name);
 962                         if (ret) {
 963                                 fprintf(stderr, "add_xattr_item failed\n");
 964                                 if(ret != -ENOTSUP)
 965                                         goto fail;
 966                         }
 967
 968                         if (S_ISDIR(st.st_mode)) {
 969                                 dir_entry = malloc(sizeof(struct directory_name_entry));
 970                                 dir_entry->dir_name = cur_file->d_name;
 971                                 dir_entry->path = make_path(parent_dir_entry->path,
 972                                                             cur_file->d_name);
 973                                 dir_entry->inum = cur_inum;
 974                                 list_add_tail(&dir_entry->list, &dir_head->list);
 975                         } else if (S_ISREG(st.st_mode)) {
 976                                 ret = add_file_items(trans, root, &cur_inode,
 977                                                      cur_inum, parent_inum, &st,
 978                                                      cur_file->d_name, out_fd);
 979                                 if (ret) {
 980                                         fprintf(stderr, "add_file_items failed\n");
 981                                         goto fail;
 982                                 }
 983                         } else if (S_ISLNK(st.st_mode)) {
 984                                 ret = add_symbolic_link(trans, root,
 985                                                         cur_inum, cur_file->d_name);
 986                                 if (ret) {
 987                                         fprintf(stderr, "add_symbolic_link failed\n");
 988                                         goto fail;
 989                                 }
 990                         }
 991                 }
 992
 993                 free_namelist(files, count);
 994                 free(parent_dir_entry->path);
 995                 free(parent_dir_entry);
 996
 997                 index_cnt = 2;
 998
 999         } while (!list_empty(&dir_head->list));
1000
1001         return 0;
1002 fail:
1003         free_namelist(files, count);
1004 fail_no_files:
1005         free(parent_dir_entry->path);
1006         free(parent_dir_entry);
1007         return -1;
1008 }
1009
1010 static int open_target(char *output_name)
1011 {
1012         int output_fd;
1013         output_fd = open(output_name, O_CREAT | O_RDWR | O_TRUNC,
1014                          S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
1015
1016         return output_fd;
1017 }
1018
1019 static int create_chunks(struct btrfs_trans_handle *trans,
1020                          struct btrfs_root *root, u64 num_of_meta_chunks,
1021                          u64 size_of_data)
1022 {
1023         u64 chunk_start;
1024         u64 chunk_size;
1025         u64 meta_type = BTRFS_BLOCK_GROUP_METADATA;
1026         u64 data_type = BTRFS_BLOCK_GROUP_DATA;
1027         u64 minimum_data_chunk_size = 8 * 1024 * 1024;
1028         u64 i;
1029         int ret;
1030
1031         for (i = 0; i < num_of_meta_chunks; i++) {
1032                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
1033                                         &chunk_start, &chunk_size, meta_type);
1034                 BUG_ON(ret);
1035                 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1036                                              meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1037                                              chunk_start, chunk_size);
1038                 BUG_ON(ret);
1039                 set_extent_dirty(&root->fs_info->free_space_cache,
1040                                  chunk_start, chunk_start + chunk_size - 1, 0);
1041         }
1042
1043         if (size_of_data < minimum_data_chunk_size)
1044                 size_of_data = minimum_data_chunk_size;
1045         ret = btrfs_alloc_data_chunk(trans, root->fs_info->extent_root,
1046                                      &chunk_start, size_of_data, data_type);
1047         BUG_ON(ret);
1048         ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
1049                                      data_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
1050                                      chunk_start, size_of_data);
1051         BUG_ON(ret);
1052         set_extent_dirty(&root->fs_info->free_space_cache,
1053                          chunk_start, chunk_start + size_of_data - 1, 0);
1054         return ret;
1055 }
1056
1057 static int make_image(char *source_dir, struct btrfs_root *root, int out_fd)
1058 {
1059         int ret;
1060         struct btrfs_trans_handle *trans;
1061
1062         struct stat root_st;
1063
1064         struct directory_name_entry dir_head;
1065
1066         ret = lstat(source_dir, &root_st);
1067         if (ret) {
1068                 fprintf(stderr, "unable to lstat the %s\n", source_dir);
1069                 goto fail;
1070         }
1071
1072         INIT_LIST_HEAD(&dir_head.list);
1073
1074         trans = btrfs_start_transaction(root, 1);
1075         ret = traverse_directory(trans, root, source_dir, &dir_head, out_fd);
1076         if (ret) {
1077                 fprintf(stderr, "unable to traverse_directory\n");
1078                 goto fail;
1079         }
1080         btrfs_commit_transaction(trans, root);
1081
1082         printf("Making image is completed.\n");
1083         return 0;
1084 fail:
1085         fprintf(stderr, "Making image is aborted.\n");
1086         return -1;
1087 }
1088
1089 static u64 size_sourcedir(char *dir_name, u64 sectorsize,
1090                           u64 *num_of_meta_chunks_ret, u64 *size_of_data_ret)
1091 {
1092         u64 dir_size = 0;
1093         u64 total_size = 0;
1094         int ret;
1095         char command[1024];
1096         char path[512];
1097         char *file_name = "temp_file";
1098         FILE *file;
1099         u64 default_chunk_size = 8 * 1024 * 1024;       /* 8MB */
1100         u64 allocated_meta_size = 8 * 1024 * 1024;      /* 8MB */
1101         u64 allocated_total_size = 20 * 1024 * 1024;    /* 20MB */
1102         u64 num_of_meta_chunks = 0;
1103         u64 num_of_allocated_meta_chunks =
1104                         allocated_meta_size / default_chunk_size;
1105
1106         ret = sprintf(command, "du -B 4096 -s ");
1107         if (ret < 0) {
1108                 fprintf(stderr, "error executing sprintf for du command\n");
1109                 return -1;
1110         }
1111         strcat(command, dir_name);
1112         strcat(command, " > ");
1113         strcat(command, file_name);
1114         ret = system(command);
1115
1116         file = fopen(file_name, "r");
1117         ret = fscanf(file, "%lld %s\n", &dir_size, path);
1118         fclose(file);
1119         remove(file_name);
1120
1121         dir_size *= sectorsize;
1122         *size_of_data_ret = dir_size;
1123
1124         num_of_meta_chunks = (dir_size / 2) / default_chunk_size;
1125         if (((dir_size / 2) % default_chunk_size) != 0)
1126                 num_of_meta_chunks++;
1127         if (num_of_meta_chunks <= num_of_allocated_meta_chunks)
1128                 num_of_meta_chunks = 0;
1129         else
1130                 num_of_meta_chunks -= num_of_allocated_meta_chunks;
1131
1132         total_size = allocated_total_size + dir_size +
1133                      (num_of_meta_chunks * default_chunk_size);
1134
1135         *num_of_meta_chunks_ret = num_of_meta_chunks;
1136
1137         return total_size;
1138 }
1139
1140 static int zero_output_file(int out_fd, u64 size, u32 sectorsize)
1141 {
1142         int len = sectorsize;
1143         int loop_num = size / sectorsize;
1144         u64 location = 0;
1145         char *buf = malloc(len);
1146         int ret = 0, i;
1147         ssize_t written;
1148
1149         if (!buf)
1150                 return -ENOMEM;
1151         memset(buf, 0, len);
1152         for (i = 0; i < loop_num; i++) {
1153                 written = pwrite64(out_fd, buf, len, location);
1154                 if (written != len)
1155                         ret = -EIO;
1156                 location += sectorsize;
1157         }
1158         free(buf);
1159         return ret;
1160 }
1161
1162 int main(int ac, char **av)
1163 {
1164         char *file;
1165         struct btrfs_root *root;
1166         struct btrfs_trans_handle *trans;
1167         char *label = NULL;
1168         char *first_file;
1169         u64 block_count = 0;
1170         u64 dev_block_count = 0;
1171         u64 blocks[7];
1172         u64 alloc_start = 0;
1173         u64 metadata_profile = BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_DUP;
1174         u64 data_profile = BTRFS_BLOCK_GROUP_RAID0;
1175         u32 leafsize = getpagesize();
1176         u32 sectorsize = 4096;
1177         u32 nodesize = leafsize;
1178         u32 stripesize = 4096;
1179         int zero_end = 1;
1180         int option_index = 0;
1181         int fd;
1182         int ret;
1183         int i;
1184         int mixed = 0;
1185         int data_profile_opt = 0;
1186         int metadata_profile_opt = 0;
1187
1188         char *source_dir = NULL;
1189         int source_dir_set = 0;
1190         u64 num_of_meta_chunks = 0;
1191         u64 size_of_data = 0;
1192         u64 source_dir_size = 0;
1193         char *pretty_buf;
1194
1195         while(1) {
1196                 int c;
1197                 c = getopt_long(ac, av, "A:b:l:n:s:m:d:L:r:VM", long_options,
1198                                 &option_index);
1199                 if (c < 0)
1200                         break;
1201                 switch(c) {
1202                         case 'A':
1203                                 alloc_start = parse_size(optarg);
1204                                 break;
1205                         case 'd':
1206                                 data_profile = parse_profile(optarg);
1207                                 data_profile_opt = 1;
1208                                 break;
1209                         case 'l':
1210                                 leafsize = parse_size(optarg);
1211                                 break;
1212                         case 'L':
1213                                 label = parse_label(optarg);
1214                                 break;
1215                         case 'm':
1216                                 metadata_profile = parse_profile(optarg);
1217                                 metadata_profile_opt = 1;
1218                                 break;
1219                         case 'M':
1220                                 mixed = 1;
1221                                 break;
1222                         case 'n':
1223                                 nodesize = parse_size(optarg);
1224                                 break;
1225                         case 's':
1226                                 sectorsize = parse_size(optarg);
1227                                 break;
1228                         case 'b':
1229                                 block_count = parse_size(optarg);
1230                                 if (block_count <= 1024*1024*1024) {
1231                                         printf("SMALL VOLUME: forcing mixed "
1232                                                "metadata/data groups\n");
1233                                         mixed = 1;
1234                                 }
1235                                 zero_end = 0;
1236                                 break;
1237                         case 'V':
1238                                 print_version();
1239                                 break;
1240                         case 'r':
1241                                 source_dir = optarg;
1242                                 source_dir_set = 1;
1243                                 break;
1244                         default:
1245                                 print_usage();
1246                 }
1247         }
1248         sectorsize = max(sectorsize, (u32)getpagesize());
1249         if (leafsize < sectorsize || (leafsize & (sectorsize - 1))) {
1250                 fprintf(stderr, "Illegal leafsize %u\n", leafsize);
1251                 exit(1);
1252         }
1253         if (nodesize < sectorsize || (nodesize & (sectorsize - 1))) {
1254                 fprintf(stderr, "Illegal nodesize %u\n", nodesize);
1255                 exit(1);
1256         }
1257         ac = ac - optind;
1258         if (ac == 0)
1259                 print_usage();
1260
1261         printf("\nWARNING! - %s IS EXPERIMENTAL\n", BTRFS_BUILD_VERSION);
1262         printf("WARNING! - see http://btrfs.wiki.kernel.org before using\n\n");
1263
1264         if (source_dir == 0) {
1265                 file = av[optind++];
1266                 ret = check_mounted(file);
1267                 if (ret < 0) {
1268                         fprintf(stderr, "error checking %s mount status\n", file);
1269                         exit(1);
1270                 }
1271                 if (ret == 1) {
1272                         fprintf(stderr, "%s is mounted\n", file);
1273                         exit(1);
1274                 }
1275                 ac--;
1276                 fd = open(file, O_RDWR);
1277                 if (fd < 0) {
1278                         fprintf(stderr, "unable to open %s\n", file);
1279                         exit(1);
1280                 }
1281                 first_file = file;
1282                 ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count, &mixed);
1283                 if (block_count == 0)
1284                         block_count = dev_block_count;
1285         } else {
1286                 ac = 0;
1287                 file = av[optind++];
1288                 fd = open_target(file);
1289                 if (fd < 0) {
1290                         fprintf(stderr, "unable to open the %s\n", file);
1291                         exit(1);
1292                 }
1293
1294                 first_file = file;
1295                 source_dir_size = size_sourcedir(source_dir, sectorsize,
1296                                              &num_of_meta_chunks, &size_of_data);
1297                 if(block_count < source_dir_size)
1298                         block_count = source_dir_size;
1299                 ret = zero_output_file(fd, block_count, sectorsize);
1300                 if (ret) {
1301                         fprintf(stderr, "unable to zero the output file\n");
1302                         exit(1);
1303                 }
1304         }
1305         if (mixed) {
1306                 if (!metadata_profile_opt)
1307                         metadata_profile = 0;
1308                 if (!data_profile_opt)
1309                         data_profile = 0;
1310
1311                 if (metadata_profile != data_profile) {
1312                         fprintf(stderr, "With mixed block groups data and metadata "
1313                                 "profiles must be the same\n");
1314                         exit(1);
1315                 }
1316         }
1317
1318         blocks[0] = BTRFS_SUPER_INFO_OFFSET;
1319         for (i = 1; i < 7; i++) {
1320                 blocks[i] = BTRFS_SUPER_INFO_OFFSET + 1024 * 1024 +
1321                         leafsize * i;
1322         }
1323
1324         ret = make_btrfs(fd, file, label, blocks, block_count,
1325                          nodesize, leafsize,
1326                          sectorsize, stripesize);
1327         if (ret) {
1328                 fprintf(stderr, "error during mkfs %d\n", ret);
1329                 exit(1);
1330         }
1331         root = open_ctree(file, 0, O_RDWR);
1332         root->fs_info->alloc_start = alloc_start;
1333
1334         ret = make_root_dir(root, mixed);
1335         if (ret) {
1336                 fprintf(stderr, "failed to setup the root directory\n");
1337                 exit(1);
1338         }
1339
1340         trans = btrfs_start_transaction(root, 1);
1341
1342         if (ac == 0)
1343                 goto raid_groups;
1344
1345         btrfs_register_one_device(file);
1346         if (!root) {
1347                 fprintf(stderr, "ctree init failed\n");
1348                 return -1;
1349         }
1350
1351         zero_end = 1;
1352         while(ac-- > 0) {
1353                 int old_mixed = mixed;
1354
1355                 file = av[optind++];
1356                 ret = check_mounted(file);
1357                 if (ret < 0) {
1358                         fprintf(stderr, "error checking %s mount status\n",
1359                                 file);
1360                         exit(1);
1361                 }
1362                 if (ret == 1) {
1363                         fprintf(stderr, "%s is mounted\n", file);
1364                         exit(1);
1365                 }
1366                 fd = open(file, O_RDWR);
1367                 if (fd < 0) {
1368                         fprintf(stderr, "unable to open %s\n", file);
1369                         exit(1);
1370                 }
1371                 ret = btrfs_device_already_in_root(root, fd,
1372                                                    BTRFS_SUPER_INFO_OFFSET);
1373                 if (ret) {
1374                         fprintf(stderr, "skipping duplicate device %s in FS\n",
1375                                 file);
1376                         close(fd);
1377                         continue;
1378                 }
1379                 ret = btrfs_prepare_device(fd, file, zero_end,
1380                                            &dev_block_count, &mixed);
1381                 mixed = old_mixed;
1382                 BUG_ON(ret);
1383
1384                 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
1385                                         sectorsize, sectorsize, sectorsize);
1386                 BUG_ON(ret);
1387                 btrfs_register_one_device(file);
1388         }
1389
1390 raid_groups:
1391         if (!source_dir_set) {
1392                 ret = create_raid_groups(trans, root, data_profile,
1393                                  metadata_profile, mixed);
1394                 BUG_ON(ret);
1395         }
1396
1397         ret = create_data_reloc_tree(trans, root);
1398         BUG_ON(ret);
1399
1400         if (mixed) {
1401                 struct btrfs_super_block *super = &root->fs_info->super_copy;
1402                 u64 flags = btrfs_super_incompat_flags(super);
1403
1404                 flags |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
1405                 btrfs_set_super_incompat_flags(super, flags);
1406         }
1407
1408         printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
1409             "sectorsize %u size %s\n",
1410             label, first_file, nodesize, leafsize, sectorsize,
1411             pretty_buf = pretty_sizes(btrfs_super_total_bytes(&root->fs_info->super_copy)));
1412         free(pretty_buf);
1413
1414         printf("%s\n", BTRFS_BUILD_VERSION);
1415         btrfs_commit_transaction(trans, root);
1416
1417         if (source_dir_set) {
1418                 trans = btrfs_start_transaction(root, 1);
1419                 ret = create_chunks(trans, root,
1420                                     num_of_meta_chunks, size_of_data);
1421                 BUG_ON(ret);
1422                 btrfs_commit_transaction(trans, root);
1423
1424                 ret = make_image(source_dir, root, fd);
1425                 BUG_ON(ret);
1426         }
1427
1428         ret = close_ctree(root);
1429         BUG_ON(ret);
1430
1431         free(label);
1432         return 0;
1433 }
1434