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 #include "kerncompat.h"
  20
  21 #include <sys/ioctl.h>
  22 #include <sys/mount.h>
  23 #include "ioctl.h"
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <sys/types.h>
  27 #include <sys/stat.h>
  28 #include <sys/dir.h>
  29 #include <fcntl.h>
  30 #include <unistd.h>
  31 #include <getopt.h>
  32 #include <uuid/uuid.h>
  33 #include <ctype.h>
  34 #include <sys/xattr.h>
  35 #include <limits.h>
  36 #include <linux/limits.h>
  37 #include <blkid/blkid.h>
  38 #include <ftw.h>
  39 #include "ctree.h"
  40 #include "disk-io.h"
  41 #include "volumes.h"
  42 #include "transaction.h"
  43 #include "utils.h"
  44
  45 static u64 index_cnt = 2;
  46
  47 #define DEFAULT_MKFS_FEATURES   (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF \
  48                 | BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
  49
  50 #define DEFAULT_MKFS_LEAF_SIZE 16384
  51
  52 struct directory_name_entry {
  53         char *dir_name;
  54         char *path;
  55         ino_t inum;
  56         struct list_head list;
  57 };
  58
  59 static int make_root_dir(struct btrfs_root *root, int mixed)
  60 {
  61         struct btrfs_trans_handle *trans;
  62         struct btrfs_key location;
  63         u64 bytes_used;
  64         u64 chunk_start = 0;
  65         u64 chunk_size = 0;
  66         int ret;
  67
  68         trans = btrfs_start_transaction(root, 1);
  69         bytes_used = btrfs_super_bytes_used(root->fs_info->super_copy);
  70
  71         root->fs_info->system_allocs = 1;
  72         ret = btrfs_make_block_group(trans, root, bytes_used,
  73                                      BTRFS_BLOCK_GROUP_SYSTEM,
  74                                      BTRFS_FIRST_CHUNK_TREE_OBJECTID,
  75                                      0, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
  76         BUG_ON(ret);
  77
  78         if (mixed) {
  79                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
  80                                         &chunk_start, &chunk_size,
  81                                         BTRFS_BLOCK_GROUP_METADATA |
  82                                         BTRFS_BLOCK_GROUP_DATA);
  83                 if (ret == -ENOSPC) {
  84                         fprintf(stderr,
  85                                 "no space to alloc data/metadata chunk\n");
  86                         goto err;
  87                 }
  88                 BUG_ON(ret);
  89                 ret = btrfs_make_block_group(trans, root, 0,
  90                                              BTRFS_BLOCK_GROUP_METADATA |
  91                                              BTRFS_BLOCK_GROUP_DATA,
  92                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
  93                                              chunk_start, chunk_size);
  94                 BUG_ON(ret);
  95                 printf("Created a data/metadata chunk of size %llu\n", chunk_size);
  96         } else {
  97                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
  98                                         &chunk_start, &chunk_size,
  99                                         BTRFS_BLOCK_GROUP_METADATA);
 100                 if (ret == -ENOSPC) {
 101                         fprintf(stderr, "no space to alloc metadata chunk\n");
 102                         goto err;
 103                 }
 104                 BUG_ON(ret);
 105                 ret = btrfs_make_block_group(trans, root, 0,
 106                                              BTRFS_BLOCK_GROUP_METADATA,
 107                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 108                                              chunk_start, chunk_size);
 109                 BUG_ON(ret);
 110         }
 111
 112         root->fs_info->system_allocs = 0;
 113         btrfs_commit_transaction(trans, root);
 114         trans = btrfs_start_transaction(root, 1);
 115         BUG_ON(!trans);
 116
 117         if (!mixed) {
 118                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 119                                         &chunk_start, &chunk_size,
 120                                         BTRFS_BLOCK_GROUP_DATA);
 121                 if (ret == -ENOSPC) {
 122                         fprintf(stderr, "no space to alloc data chunk\n");
 123                         goto err;
 124                 }
 125                 BUG_ON(ret);
 126                 ret = btrfs_make_block_group(trans, root, 0,
 127                                              BTRFS_BLOCK_GROUP_DATA,
 128                                              BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 129                                              chunk_start, chunk_size);
 130                 BUG_ON(ret);
 131         }
 132
 133         ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
 134                               BTRFS_ROOT_TREE_DIR_OBJECTID);
 135         if (ret)
 136                 goto err;
 137         ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
 138         if (ret)
 139                 goto err;
 140         memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
 141         location.offset = (u64)-1;
 142         ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
 143                         "default", 7,
 144                         btrfs_super_root_dir(root->fs_info->super_copy),
 145                         &location, BTRFS_FT_DIR, 0);
 146         if (ret)
 147                 goto err;
 148
 149         ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
 150                              "default", 7, location.objectid,
 151                              BTRFS_ROOT_TREE_DIR_OBJECTID, 0);
 152         if (ret)
 153                 goto err;
 154
 155         btrfs_commit_transaction(trans, root);
 156 err:
 157         return ret;
 158 }
 159
 160 static void __recow_root(struct btrfs_trans_handle *trans,
 161                          struct btrfs_root *root)
 162 {
 163         int ret;
 164         struct extent_buffer *tmp;
 165
 166         if (trans->transid != btrfs_root_generation(&root->root_item)) {
 167                 extent_buffer_get(root->node);
 168                 ret = __btrfs_cow_block(trans, root, root->node,
 169                                         NULL, 0, &tmp, 0, 0);
 170                 BUG_ON(ret);
 171                 free_extent_buffer(tmp);
 172         }
 173 }
 174
 175 static void recow_roots(struct btrfs_trans_handle *trans,
 176                        struct btrfs_root *root)
 177 {
 178         struct btrfs_fs_info *info = root->fs_info;
 179
 180         __recow_root(trans, info->fs_root);
 181         __recow_root(trans, info->tree_root);
 182         __recow_root(trans, info->extent_root);
 183         __recow_root(trans, info->chunk_root);
 184         __recow_root(trans, info->dev_root);
 185         __recow_root(trans, info->csum_root);
 186 }
 187
 188 static int create_one_raid_group(struct btrfs_trans_handle *trans,
 189                               struct btrfs_root *root, u64 type)
 190 {
 191         u64 chunk_start;
 192         u64 chunk_size;
 193         int ret;
 194
 195         ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 196                                 &chunk_start, &chunk_size, type);
 197         if (ret == -ENOSPC) {
 198                 fprintf(stderr, "not enough free space\n");
 199                 exit(1);
 200         }
 201         BUG_ON(ret);
 202         ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
 203                                      type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 204                                      chunk_start, chunk_size);
 205         BUG_ON(ret);
 206         return ret;
 207 }
 208
 209 static int create_raid_groups(struct btrfs_trans_handle *trans,
 210                               struct btrfs_root *root, u64 data_profile,
 211                               int data_profile_opt, u64 metadata_profile,
 212                               int mixed)
 213 {
 214         u64 num_devices = btrfs_super_num_devices(root->fs_info->super_copy);
 215         int ret;
 216
 217         if (metadata_profile) {
 218                 u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA;
 219
 220                 ret = create_one_raid_group(trans, root,
 221                                             BTRFS_BLOCK_GROUP_SYSTEM |
 222                                             metadata_profile);
 223                 BUG_ON(ret);
 224
 225                 if (mixed)
 226                         meta_flags |= BTRFS_BLOCK_GROUP_DATA;
 227
 228                 ret = create_one_raid_group(trans, root, meta_flags |
 229                                             metadata_profile);
 230                 BUG_ON(ret);
 231
 232         }
 233         if (!mixed && num_devices > 1 && data_profile) {
 234                 ret = create_one_raid_group(trans, root,
 235                                             BTRFS_BLOCK_GROUP_DATA |
 236                                             data_profile);
 237                 BUG_ON(ret);
 238         }
 239         recow_roots(trans, root);
 240
 241         return 0;
 242 }
 243
 244 static int create_data_reloc_tree(struct btrfs_trans_handle *trans,
 245                                   struct btrfs_root *root)
 246 {
 247         struct btrfs_key location;
 248         struct btrfs_root_item root_item;
 249         struct extent_buffer *tmp;
 250         u64 objectid = BTRFS_DATA_RELOC_TREE_OBJECTID;
 251         int ret;
 252
 253         ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
 254         BUG_ON(ret);
 255
 256         memcpy(&root_item, &root->root_item, sizeof(root_item));
 257         btrfs_set_root_bytenr(&root_item, tmp->start);
 258         btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
 259         btrfs_set_root_generation(&root_item, trans->transid);
 260         free_extent_buffer(tmp);
 261
 262         location.objectid = objectid;
 263         location.type = BTRFS_ROOT_ITEM_KEY;
 264         location.offset = 0;
 265         ret = btrfs_insert_root(trans, root->fs_info->tree_root,
 266                                 &location, &root_item);
 267         BUG_ON(ret);
 268         return 0;
 269 }
 270
 271
 272 static void print_usage(void) __attribute__((noreturn));
 273 static void print_usage(void)
 274 {
 275         fprintf(stderr, "usage: mkfs.btrfs [options] dev [ dev ... ]\n");
 276         fprintf(stderr, "options:\n");
 277         fprintf(stderr, "\t -A --alloc-start the offset to start the FS\n");
 278         fprintf(stderr, "\t -b --byte-count total number of bytes in the FS\n");
 279         fprintf(stderr, "\t -d --data data profile, raid0, raid1, raid5, raid6, raid10, dup or single\n");
 280         fprintf(stderr, "\t -f --force force overwrite of existing filesystem\n");
 281         fprintf(stderr, "\t -l --leafsize size of btree leaves\n");
 282         fprintf(stderr, "\t -L --label set a label\n");
 283         fprintf(stderr, "\t -m --metadata metadata profile, values like data profile\n");
 284         fprintf(stderr, "\t -M --mixed mix metadata and data together\n");
 285         fprintf(stderr, "\t -n --nodesize size of btree nodes\n");
 286         fprintf(stderr, "\t -s --sectorsize min block allocation (may not mountable by current kernel)\n");
 287         fprintf(stderr, "\t -r --rootdir the source directory\n");
 288         fprintf(stderr, "\t -K --nodiscard do not perform whole device TRIM\n");
 289         fprintf(stderr, "\t -O --features comma separated list of filesystem features\n");
 290         fprintf(stderr, "\t -U --uuid specify the filesystem UUID\n");
 291         fprintf(stderr, "\t -V --version print the mkfs.btrfs version and exit\n");
 292         fprintf(stderr, "%s\n", PACKAGE_STRING);
 293         exit(1);
 294 }
 295
 296 static void print_version(void) __attribute__((noreturn));
 297 static void print_version(void)
 298 {
 299         fprintf(stderr, "mkfs.btrfs, part of %s\n", PACKAGE_STRING);
 300         exit(0);
 301 }
 302
 303 static u64 parse_profile(char *s)
 304 {
 305         if (strcmp(s, "raid0") == 0) {
 306                 return BTRFS_BLOCK_GROUP_RAID0;
 307         } else if (strcmp(s, "raid1") == 0) {
 308                 return BTRFS_BLOCK_GROUP_RAID1;
 309         } else if (strcmp(s, "raid5") == 0) {
 310                 return BTRFS_BLOCK_GROUP_RAID5;
 311         } else if (strcmp(s, "raid6") == 0) {
 312                 return BTRFS_BLOCK_GROUP_RAID6;
 313         } else if (strcmp(s, "raid10") == 0) {
 314                 return BTRFS_BLOCK_GROUP_RAID10;
 315         } else if (strcmp(s, "dup") == 0) {
 316                 return BTRFS_BLOCK_GROUP_DUP;
 317         } else if (strcmp(s, "single") == 0) {
 318                 return 0;
 319         } else {
 320                 fprintf(stderr, "Unknown profile %s\n", s);
 321                 print_usage();
 322         }
 323         /* not reached */
 324         return 0;
 325 }
 326
 327 static char *parse_label(char *input)
 328 {
 329         int len = strlen(input);
 330
 331         if (len >= BTRFS_LABEL_SIZE) {
 332                 fprintf(stderr, "Label %s is too long (max %d)\n", input,
 333                         BTRFS_LABEL_SIZE - 1);
 334                 exit(1);
 335         }
 336         return strdup(input);
 337 }
 338
 339 static int add_directory_items(struct btrfs_trans_handle *trans,
 340                                struct btrfs_root *root, u64 objectid,
 341                                ino_t parent_inum, const char *name,
 342                                struct stat *st, int *dir_index_cnt)
 343 {
 344         int ret;
 345         int name_len;
 346         struct btrfs_key location;
 347         u8 filetype = 0;
 348
 349         name_len = strlen(name);
 350
 351         location.objectid = objectid;
 352         location.offset = 0;
 353         btrfs_set_key_type(&location, BTRFS_INODE_ITEM_KEY);
 354
 355         if (S_ISDIR(st->st_mode))
 356                 filetype = BTRFS_FT_DIR;
 357         if (S_ISREG(st->st_mode))
 358                 filetype = BTRFS_FT_REG_FILE;
 359         if (S_ISLNK(st->st_mode))
 360                 filetype = BTRFS_FT_SYMLINK;
 361
 362         ret = btrfs_insert_dir_item(trans, root, name, name_len,
 363                                     parent_inum, &location,
 364                                     filetype, index_cnt);
 365         if (ret)
 366                 return ret;
 367         ret = btrfs_insert_inode_ref(trans, root, name, name_len,
 368                                      objectid, parent_inum, index_cnt);
 369         *dir_index_cnt = index_cnt;
 370         index_cnt++;
 371
 372         return ret;
 373 }
 374
 375 static int fill_inode_item(struct btrfs_trans_handle *trans,
 376                            struct btrfs_root *root,
 377                            struct btrfs_inode_item *dst, struct stat *src)
 378 {
 379         u64 blocks = 0;
 380         u64 sectorsize = root->sectorsize;
 381
 382         /*
 383          * btrfs_inode_item has some reserved fields
 384          * and represents on-disk inode entry, so
 385          * zero everything to prevent information leak
 386          */
 387         memset(dst, 0, sizeof (*dst));
 388
 389         btrfs_set_stack_inode_generation(dst, trans->transid);
 390         btrfs_set_stack_inode_size(dst, src->st_size);
 391         btrfs_set_stack_inode_nbytes(dst, 0);
 392         btrfs_set_stack_inode_block_group(dst, 0);
 393         btrfs_set_stack_inode_nlink(dst, src->st_nlink);
 394         btrfs_set_stack_inode_uid(dst, src->st_uid);
 395         btrfs_set_stack_inode_gid(dst, src->st_gid);
 396         btrfs_set_stack_inode_mode(dst, src->st_mode);
 397         btrfs_set_stack_inode_rdev(dst, 0);
 398         btrfs_set_stack_inode_flags(dst, 0);
 399         btrfs_set_stack_timespec_sec(&dst->atime, src->st_atime);
 400         btrfs_set_stack_timespec_nsec(&dst->atime, 0);
 401         btrfs_set_stack_timespec_sec(&dst->ctime, src->st_ctime);
 402         btrfs_set_stack_timespec_nsec(&dst->ctime, 0);
 403         btrfs_set_stack_timespec_sec(&dst->mtime, src->st_mtime);
 404         btrfs_set_stack_timespec_nsec(&dst->mtime, 0);
 405         btrfs_set_stack_timespec_sec(&dst->otime, 0);
 406         btrfs_set_stack_timespec_nsec(&dst->otime, 0);
 407
 408         if (S_ISDIR(src->st_mode)) {
 409                 btrfs_set_stack_inode_size(dst, 0);
 410                 btrfs_set_stack_inode_nlink(dst, 1);
 411         }
 412         if (S_ISREG(src->st_mode)) {
 413                 btrfs_set_stack_inode_size(dst, (u64)src->st_size);
 414                 if (src->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root))
 415                         btrfs_set_stack_inode_nbytes(dst, src->st_size);
 416                 else {
 417                         blocks = src->st_size / sectorsize;
 418                         if (src->st_size % sectorsize)
 419                                 blocks += 1;
 420                         blocks *= sectorsize;
 421                         btrfs_set_stack_inode_nbytes(dst, blocks);
 422                 }
 423         }
 424         if (S_ISLNK(src->st_mode))
 425                 btrfs_set_stack_inode_nbytes(dst, src->st_size + 1);
 426
 427         return 0;
 428 }
 429
 430 static int directory_select(const struct direct *entry)
 431 {
 432         if ((strncmp(entry->d_name, ".", entry->d_reclen) == 0) ||
 433                 (strncmp(entry->d_name, "..", entry->d_reclen) == 0))
 434                 return 0;
 435         else
 436                 return 1;
 437 }
 438
 439 static void free_namelist(struct direct **files, int count)
 440 {
 441         int i;
 442
 443         if (count < 0)
 444                 return;
 445
 446         for (i = 0; i < count; ++i)
 447                 free(files[i]);
 448         free(files);
 449 }
 450
 451 static u64 calculate_dir_inode_size(char *dirname)
 452 {
 453         int count, i;
 454         struct direct **files, *cur_file;
 455         u64 dir_inode_size = 0;
 456
 457         count = scandir(dirname, &files, directory_select, NULL);
 458
 459         for (i = 0; i < count; i++) {
 460                 cur_file = files[i];
 461                 dir_inode_size += strlen(cur_file->d_name);
 462         }
 463
 464         free_namelist(files, count);
 465
 466         dir_inode_size *= 2;
 467         return dir_inode_size;
 468 }
 469
 470 static int add_inode_items(struct btrfs_trans_handle *trans,
 471                            struct btrfs_root *root,
 472                            struct stat *st, char *name,
 473                            u64 self_objectid, ino_t parent_inum,
 474                            int dir_index_cnt, struct btrfs_inode_item *inode_ret)
 475 {
 476         int ret;
 477         struct btrfs_key inode_key;
 478         struct btrfs_inode_item btrfs_inode;
 479         u64 objectid;
 480         u64 inode_size = 0;
 481
 482         fill_inode_item(trans, root, &btrfs_inode, st);
 483         objectid = self_objectid;
 484
 485         if (S_ISDIR(st->st_mode)) {
 486                 inode_size = calculate_dir_inode_size(name);
 487                 btrfs_set_stack_inode_size(&btrfs_inode, inode_size);
 488         }
 489
 490         inode_key.objectid = objectid;
 491         inode_key.offset = 0;
 492         btrfs_set_key_type(&inode_key, BTRFS_INODE_ITEM_KEY);
 493
 494         ret = btrfs_insert_inode(trans, root, objectid, &btrfs_inode);
 495
 496         *inode_ret = btrfs_inode;
 497         return ret;
 498 }
 499
 500 static int add_xattr_item(struct btrfs_trans_handle *trans,
 501                           struct btrfs_root *root, u64 objectid,
 502                           const char *file_name)
 503 {
 504         int ret;
 505         int cur_name_len;
 506         char xattr_list[XATTR_LIST_MAX];
 507         char *cur_name;
 508         char cur_value[XATTR_SIZE_MAX];
 509         char delimiter = '\0';
 510         char *next_location = xattr_list;
 511
 512         ret = llistxattr(file_name, xattr_list, XATTR_LIST_MAX);
 513         if (ret < 0) {
 514                 if(errno == ENOTSUP)
 515                         return 0;
 516                 fprintf(stderr, "get a list of xattr failed for %s\n",
 517                         file_name);
 518                 return ret;
 519         }
 520         if (ret == 0)
 521                 return ret;
 522
 523         cur_name = strtok(xattr_list, &delimiter);
 524         while (cur_name != NULL) {
 525                 cur_name_len = strlen(cur_name);
 526                 next_location += cur_name_len + 1;
 527
 528                 ret = getxattr(file_name, cur_name, cur_value, XATTR_SIZE_MAX);
 529                 if (ret < 0) {
 530                         if(errno == ENOTSUP)
 531                                 return 0;
 532                         fprintf(stderr, "get a xattr value failed for %s attr %s\n",
 533                                 file_name, cur_name);
 534                         return ret;
 535                 }
 536
 537                 ret = btrfs_insert_xattr_item(trans, root, cur_name,
 538                                               cur_name_len, cur_value,
 539                                               ret, objectid);
 540                 if (ret) {
 541                         fprintf(stderr, "insert a xattr item failed for %s\n",
 542                                 file_name);
 543                 }
 544
 545                 cur_name = strtok(next_location, &delimiter);
 546         }
 547
 548         return ret;
 549 }
 550
 551 static int add_symbolic_link(struct btrfs_trans_handle *trans,
 552                              struct btrfs_root *root,
 553                              u64 objectid, const char *path_name)
 554 {
 555         int ret;
 556         u64 sectorsize = root->sectorsize;
 557         char *buf = malloc(sectorsize);
 558
 559         ret = readlink(path_name, buf, sectorsize);
 560         if (ret <= 0) {
 561                 fprintf(stderr, "readlink failed for %s\n", path_name);
 562                 goto fail;
 563         }
 564         if (ret >= sectorsize) {
 565                 fprintf(stderr, "symlink too long for %s", path_name);
 566                 ret = -1;
 567                 goto fail;
 568         }
 569
 570         buf[ret] = '\0'; /* readlink does not do it for us */
 571         ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
 572                                          buf, ret + 1);
 573 fail:
 574         free(buf);
 575         return ret;
 576 }
 577
 578 static int add_file_items(struct btrfs_trans_handle *trans,
 579                           struct btrfs_root *root,
 580                           struct btrfs_inode_item *btrfs_inode, u64 objectid,
 581                           ino_t parent_inum, struct stat *st,
 582                           const char *path_name, int out_fd)
 583 {
 584         int ret = -1;
 585         ssize_t ret_read;
 586         u64 bytes_read = 0;
 587         struct btrfs_key key;
 588         int blocks;
 589         u32 sectorsize = root->sectorsize;
 590         u64 first_block = 0;
 591         u64 file_pos = 0;
 592         u64 cur_bytes;
 593         u64 total_bytes;
 594         struct extent_buffer *eb = NULL;
 595         int fd;
 596
 597         if (st->st_size == 0)
 598                 return 0;
 599
 600         fd = open(path_name, O_RDONLY);
 601         if (fd == -1) {
 602                 fprintf(stderr, "%s open failed\n", path_name);
 603                 return ret;
 604         }
 605
 606         blocks = st->st_size / sectorsize;
 607         if (st->st_size % sectorsize)
 608                 blocks += 1;
 609
 610         if (st->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root)) {
 611                 char *buffer = malloc(st->st_size);
 612                 ret_read = pread64(fd, buffer, st->st_size, bytes_read);
 613                 if (ret_read == -1) {
 614                         fprintf(stderr, "%s read failed\n", path_name);
 615                         free(buffer);
 616                         goto end;
 617                 }
 618
 619                 ret = btrfs_insert_inline_extent(trans, root, objectid, 0,
 620                                                  buffer, st->st_size);
 621                 free(buffer);
 622                 goto end;
 623         }
 624
 625         /* round up our st_size to the FS blocksize */
 626         total_bytes = (u64)blocks * sectorsize;
 627
 628         /*
 629          * do our IO in extent buffers so it can work
 630          * against any raid type
 631          */
 632         eb = malloc(sizeof(*eb) + sectorsize);
 633         if (!eb) {
 634                 ret = -ENOMEM;
 635                 goto end;
 636         }
 637         memset(eb, 0, sizeof(*eb) + sectorsize);
 638
 639 again:
 640
 641         /*
 642          * keep our extent size at 1MB max, this makes it easier to work inside
 643          * the tiny block groups created during mkfs
 644          */
 645         cur_bytes = min(total_bytes, 1024ULL * 1024);
 646         ret = btrfs_reserve_extent(trans, root, cur_bytes, 0, 0, (u64)-1,
 647                                    &key, 1);
 648         if (ret)
 649                 goto end;
 650
 651         first_block = key.objectid;
 652         bytes_read = 0;
 653
 654         while (bytes_read < cur_bytes) {
 655
 656                 memset(eb->data, 0, sectorsize);
 657
 658                 ret_read = pread64(fd, eb->data, sectorsize, file_pos + bytes_read);
 659                 if (ret_read == -1) {
 660                         fprintf(stderr, "%s read failed\n", path_name);
 661                         goto end;
 662                 }
 663
 664                 eb->start = first_block + bytes_read;
 665                 eb->len = sectorsize;
 666
 667                 /*
 668                  * we're doing the csum before we record the extent, but
 669                  * that's ok
 670                  */
 671                 ret = btrfs_csum_file_block(trans, root->fs_info->csum_root,
 672                                             first_block + bytes_read + sectorsize,
 673                                             first_block + bytes_read,
 674                                             eb->data, sectorsize);
 675                 if (ret)
 676                         goto end;
 677
 678                 ret = write_and_map_eb(trans, root, eb);
 679                 if (ret) {
 680                         fprintf(stderr, "output file write failed\n");
 681                         goto end;
 682                 }
 683
 684                 bytes_read += sectorsize;
 685         }
 686
 687         if (bytes_read) {
 688                 ret = btrfs_record_file_extent(trans, root, objectid, btrfs_inode,
 689                                                file_pos, first_block, cur_bytes);
 690                 if (ret)
 691                         goto end;
 692
 693         }
 694
 695         file_pos += cur_bytes;
 696         total_bytes -= cur_bytes;
 697
 698         if (total_bytes)
 699                 goto again;
 700
 701 end:
 702         free(eb);
 703         close(fd);
 704         return ret;
 705 }
 706
 707 static char *make_path(char *dir, char *name)
 708 {
 709         char *path;
 710
 711         path = malloc(strlen(dir) + strlen(name) + 2);
 712         if (!path)
 713                 return NULL;
 714         strcpy(path, dir);
 715         if (dir[strlen(dir) - 1] != '/')
 716                 strcat(path, "/");
 717         strcat(path, name);
 718         return path;
 719 }
 720
 721 static int traverse_directory(struct btrfs_trans_handle *trans,
 722                               struct btrfs_root *root, char *dir_name,
 723                               struct directory_name_entry *dir_head, int out_fd)
 724 {
 725         int ret = 0;
 726
 727         struct btrfs_inode_item cur_inode;
 728         struct btrfs_inode_item *inode_item;
 729         int count, i, dir_index_cnt;
 730         struct direct **files;
 731         struct stat st;
 732         struct directory_name_entry *dir_entry, *parent_dir_entry;
 733         struct direct *cur_file;
 734         ino_t parent_inum, cur_inum;
 735         ino_t highest_inum = 0;
 736         char *parent_dir_name;
 737         char real_path[PATH_MAX];
 738         struct btrfs_path path;
 739         struct extent_buffer *leaf;
 740         struct btrfs_key root_dir_key;
 741         u64 root_dir_inode_size = 0;
 742
 743         /* Add list for source directory */
 744         dir_entry = malloc(sizeof(struct directory_name_entry));
 745         dir_entry->dir_name = dir_name;
 746         dir_entry->path = realpath(dir_name, real_path);
 747         if (!dir_entry->path) {
 748                 fprintf(stderr, "get directory real path error\n");
 749                 ret = -1;
 750                 goto fail_no_dir;
 751         }
 752
 753         parent_inum = highest_inum + BTRFS_FIRST_FREE_OBJECTID;
 754         dir_entry->inum = parent_inum;
 755         list_add_tail(&dir_entry->list, &dir_head->list);
 756
 757         btrfs_init_path(&path);
 758
 759         root_dir_key.objectid = btrfs_root_dirid(&root->root_item);
 760         root_dir_key.offset = 0;
 761         btrfs_set_key_type(&root_dir_key, BTRFS_INODE_ITEM_KEY);
 762         ret = btrfs_lookup_inode(trans, root, &path, &root_dir_key, 1);
 763         if (ret) {
 764                 fprintf(stderr, "root dir lookup error\n");
 765                 goto fail_no_dir;
 766         }
 767
 768         leaf = path.nodes[0];
 769         inode_item = btrfs_item_ptr(leaf, path.slots[0],
 770                                     struct btrfs_inode_item);
 771
 772         root_dir_inode_size = calculate_dir_inode_size(dir_name);
 773         btrfs_set_inode_size(leaf, inode_item, root_dir_inode_size);
 774         btrfs_mark_buffer_dirty(leaf);
 775
 776         btrfs_release_path(&path);
 777
 778         do {
 779                 parent_dir_entry = list_entry(dir_head->list.next,
 780                                               struct directory_name_entry,
 781                                               list);
 782                 list_del(&parent_dir_entry->list);
 783
 784                 parent_inum = parent_dir_entry->inum;
 785                 parent_dir_name = parent_dir_entry->dir_name;
 786                 if (chdir(parent_dir_entry->path)) {
 787                         fprintf(stderr, "chdir error for %s\n",
 788                                 parent_dir_name);
 789                         ret = -1;
 790                         goto fail_no_files;
 791                 }
 792
 793                 count = scandir(parent_dir_entry->path, &files,
 794                                 directory_select, NULL);
 795                 if (count == -1)
 796                 {
 797                         fprintf(stderr, "scandir for %s failed: %s\n",
 798                                 parent_dir_name, strerror (errno));
 799                         ret = -1;
 800                         goto fail;
 801                 }
 802
 803                 for (i = 0; i < count; i++) {
 804                         cur_file = files[i];
 805
 806                         if (lstat(cur_file->d_name, &st) == -1) {
 807                                 fprintf(stderr, "lstat failed for file %s\n",
 808                                         cur_file->d_name);
 809                                 ret = -1;
 810                                 goto fail;
 811                         }
 812
 813                         cur_inum = st.st_ino;
 814                         ret = add_directory_items(trans, root,
 815                                                   cur_inum, parent_inum,
 816                                                   cur_file->d_name,
 817                                                   &st, &dir_index_cnt);
 818                         if (ret) {
 819                                 fprintf(stderr, "add_directory_items failed\n");
 820                                 goto fail;
 821                         }
 822
 823                         ret = add_inode_items(trans, root, &st,
 824                                               cur_file->d_name, cur_inum,
 825                                               parent_inum, dir_index_cnt,
 826                                               &cur_inode);
 827                         if (ret == -EEXIST) {
 828                                 BUG_ON(st.st_nlink <= 1);
 829                                 continue;
 830                         }
 831                         if (ret) {
 832                                 fprintf(stderr, "add_inode_items failed\n");
 833                                 goto fail;
 834                         }
 835
 836                         ret = add_xattr_item(trans, root,
 837                                              cur_inum, cur_file->d_name);
 838                         if (ret) {
 839                                 fprintf(stderr, "add_xattr_item failed\n");
 840                                 if(ret != -ENOTSUP)
 841                                         goto fail;
 842                         }
 843
 844                         if (S_ISDIR(st.st_mode)) {
 845                                 dir_entry = malloc(sizeof(struct directory_name_entry));
 846                                 dir_entry->dir_name = cur_file->d_name;
 847                                 dir_entry->path = make_path(parent_dir_entry->path,
 848                                                             cur_file->d_name);
 849                                 dir_entry->inum = cur_inum;
 850                                 list_add_tail(&dir_entry->list, &dir_head->list);
 851                         } else if (S_ISREG(st.st_mode)) {
 852                                 ret = add_file_items(trans, root, &cur_inode,
 853                                                      cur_inum, parent_inum, &st,
 854                                                      cur_file->d_name, out_fd);
 855                                 if (ret) {
 856                                         fprintf(stderr, "add_file_items failed\n");
 857                                         goto fail;
 858                                 }
 859                         } else if (S_ISLNK(st.st_mode)) {
 860                                 ret = add_symbolic_link(trans, root,
 861                                                         cur_inum, cur_file->d_name);
 862                                 if (ret) {
 863                                         fprintf(stderr, "add_symbolic_link failed\n");
 864                                         goto fail;
 865                                 }
 866                         }
 867                 }
 868
 869                 free_namelist(files, count);
 870                 free(parent_dir_entry);
 871
 872                 index_cnt = 2;
 873
 874         } while (!list_empty(&dir_head->list));
 875
 876 out:
 877         return !!ret;
 878 fail:
 879         free_namelist(files, count);
 880 fail_no_files:
 881         free(parent_dir_entry);
 882         goto out;
 883 fail_no_dir:
 884         free(dir_entry);
 885         goto out;
 886 }
 887
 888 static int open_target(char *output_name)
 889 {
 890         int output_fd;
 891         output_fd = open(output_name, O_CREAT | O_RDWR | O_TRUNC,
 892                          S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
 893
 894         return output_fd;
 895 }
 896
 897 static int create_chunks(struct btrfs_trans_handle *trans,
 898                          struct btrfs_root *root, u64 num_of_meta_chunks,
 899                          u64 size_of_data)
 900 {
 901         u64 chunk_start;
 902         u64 chunk_size;
 903         u64 meta_type = BTRFS_BLOCK_GROUP_METADATA;
 904         u64 data_type = BTRFS_BLOCK_GROUP_DATA;
 905         u64 minimum_data_chunk_size = 8 * 1024 * 1024;
 906         u64 i;
 907         int ret;
 908
 909         for (i = 0; i < num_of_meta_chunks; i++) {
 910                 ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 911                                         &chunk_start, &chunk_size, meta_type);
 912                 BUG_ON(ret);
 913                 ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
 914                                              meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 915                                              chunk_start, chunk_size);
 916                 BUG_ON(ret);
 917                 set_extent_dirty(&root->fs_info->free_space_cache,
 918                                  chunk_start, chunk_start + chunk_size - 1, 0);
 919         }
 920
 921         if (size_of_data < minimum_data_chunk_size)
 922                 size_of_data = minimum_data_chunk_size;
 923
 924         ret = btrfs_alloc_data_chunk(trans, root->fs_info->extent_root,
 925                                      &chunk_start, size_of_data, data_type);
 926         BUG_ON(ret);
 927         ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
 928                                      data_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 929                                      chunk_start, size_of_data);
 930         BUG_ON(ret);
 931         set_extent_dirty(&root->fs_info->free_space_cache,
 932                          chunk_start, chunk_start + size_of_data - 1, 0);
 933         return ret;
 934 }
 935
 936 static int make_image(char *source_dir, struct btrfs_root *root, int out_fd)
 937 {
 938         int ret;
 939         struct btrfs_trans_handle *trans;
 940
 941         struct stat root_st;
 942
 943         struct directory_name_entry dir_head;
 944
 945         struct directory_name_entry *dir_entry = NULL;
 946
 947         ret = lstat(source_dir, &root_st);
 948         if (ret) {
 949                 fprintf(stderr, "unable to lstat the %s\n", source_dir);
 950                 goto out;
 951         }
 952
 953         INIT_LIST_HEAD(&dir_head.list);
 954
 955         trans = btrfs_start_transaction(root, 1);
 956         ret = traverse_directory(trans, root, source_dir, &dir_head, out_fd);
 957         if (ret) {
 958                 fprintf(stderr, "unable to traverse_directory\n");
 959                 goto fail;
 960         }
 961         btrfs_commit_transaction(trans, root);
 962
 963         printf("Making image is completed.\n");
 964         return 0;
 965 fail:
 966         while (!list_empty(&dir_head.list)) {
 967                 dir_entry = list_entry(dir_head.list.next,
 968                                        struct directory_name_entry, list);
 969                 list_del(&dir_entry->list);
 970                 free(dir_entry);
 971         }
 972 out:
 973         fprintf(stderr, "Making image is aborted.\n");
 974         return -1;
 975 }
 976
 977 /*
 978  * This ignores symlinks with unreadable targets and subdirs that can't
 979  * be read.  It's a best-effort to give a rough estimate of the size of
 980  * a subdir.  It doesn't guarantee that prepopulating btrfs from this
 981  * tree won't still run out of space.
 982  *
 983  * The rounding up to 4096 is questionable.  Previous code used du -B 4096.
 984  */
 985 static u64 global_total_size;
 986 static int ftw_add_entry_size(const char *fpath, const struct stat *st,
 987                               int type)
 988 {
 989         if (type == FTW_F || type == FTW_D)
 990                 global_total_size += round_up(st->st_size, 4096);
 991
 992         return 0;
 993 }
 994
 995 static u64 size_sourcedir(char *dir_name, u64 sectorsize,
 996                           u64 *num_of_meta_chunks_ret, u64 *size_of_data_ret)
 997 {
 998         u64 dir_size = 0;
 999         u64 total_size = 0;
1000         int ret;
1001         u64 default_chunk_size = 8 * 1024 * 1024;       /* 8MB */
1002         u64 allocated_meta_size = 8 * 1024 * 1024;      /* 8MB */
1003         u64 allocated_total_size = 20 * 1024 * 1024;    /* 20MB */
1004         u64 num_of_meta_chunks = 0;
1005         u64 num_of_data_chunks = 0;
1006         u64 num_of_allocated_meta_chunks =
1007                         allocated_meta_size / default_chunk_size;
1008
1009         global_total_size = 0;
1010         ret = ftw(dir_name, ftw_add_entry_size, 10);
1011         dir_size = global_total_size;
1012         if (ret < 0) {
1013                 fprintf(stderr, "ftw subdir walk of '%s' failed: %s\n",
1014                         dir_name, strerror(errno));
1015                 exit(1);
1016         }
1017
1018         num_of_data_chunks = (dir_size + default_chunk_size - 1) /
1019                 default_chunk_size;
1020
1021         num_of_meta_chunks = (dir_size / 2) / default_chunk_size;
1022         if (((dir_size / 2) % default_chunk_size) != 0)
1023                 num_of_meta_chunks++;
1024         if (num_of_meta_chunks <= num_of_allocated_meta_chunks)
1025                 num_of_meta_chunks = 0;
1026         else
1027                 num_of_meta_chunks -= num_of_allocated_meta_chunks;
1028
1029         total_size = allocated_total_size +
1030                      (num_of_data_chunks * default_chunk_size) +
1031                      (num_of_meta_chunks * default_chunk_size);
1032
1033         *num_of_meta_chunks_ret = num_of_meta_chunks;
1034         *size_of_data_ret = num_of_data_chunks * default_chunk_size;
1035         return total_size;
1036 }
1037
1038 static int zero_output_file(int out_fd, u64 size, u32 sectorsize)
1039 {
1040         int len = sectorsize;
1041         int loop_num = size / sectorsize;
1042         u64 location = 0;
1043         char *buf = malloc(len);
1044         int ret = 0, i;
1045         ssize_t written;
1046
1047         if (!buf)
1048                 return -ENOMEM;
1049         memset(buf, 0, len);
1050         for (i = 0; i < loop_num; i++) {
1051                 written = pwrite64(out_fd, buf, len, location);
1052                 if (written != len)
1053                         ret = -EIO;
1054                 location += sectorsize;
1055         }
1056         free(buf);
1057         return ret;
1058 }
1059
1060 static int check_leaf_or_node_size(u32 size, u32 sectorsize)
1061 {
1062         if (size < sectorsize) {
1063                 fprintf(stderr,
1064                         "Illegal leafsize (or nodesize) %u (smaller than %u)\n",
1065                         size, sectorsize);
1066                 return -1;
1067         } else if (size > BTRFS_MAX_METADATA_BLOCKSIZE) {
1068                 fprintf(stderr,
1069                         "Illegal leafsize (or nodesize) %u (larger than %u)\n",
1070                         size, BTRFS_MAX_METADATA_BLOCKSIZE);
1071                 return -1;
1072         } else if (size & (sectorsize - 1)) {
1073                 fprintf(stderr,
1074                         "Illegal leafsize (or nodesize) %u (not align to %u)\n",
1075                         size, sectorsize);
1076                 return -1;
1077         }
1078         return 0;
1079 }
1080
1081 static int is_ssd(const char *file)
1082 {
1083         blkid_probe probe;
1084         char wholedisk[32];
1085         char sysfs_path[PATH_MAX];
1086         dev_t devno;
1087         int fd;
1088         char rotational;
1089         int ret;
1090
1091         probe = blkid_new_probe_from_filename(file);
1092         if (!probe)
1093                 return 0;
1094
1095         /* Device number of this disk (possibly a partition) */
1096         devno = blkid_probe_get_devno(probe);
1097         if (!devno) {
1098                 blkid_free_probe(probe);
1099                 return 0;
1100         }
1101
1102         /* Get whole disk name (not full path) for this devno */
1103         ret = blkid_devno_to_wholedisk(devno,
1104                         wholedisk, sizeof(wholedisk), NULL);
1105         if (ret) {
1106                 blkid_free_probe(probe);
1107                 return 0;
1108         }
1109
1110         snprintf(sysfs_path, PATH_MAX, "/sys/block/%s/queue/rotational",
1111                  wholedisk);
1112
1113         blkid_free_probe(probe);
1114
1115         fd = open(sysfs_path, O_RDONLY);
1116         if (fd < 0) {
1117                 return 0;
1118         }
1119
1120         if (read(fd, &rotational, sizeof(char)) < sizeof(char)) {
1121                 close(fd);
1122                 return 0;
1123         }
1124         close(fd);
1125
1126         return !atoi((const char *)&rotational);
1127 }
1128
1129 #define BTRFS_FEATURE_LIST_ALL          (1ULL << 63)
1130
1131 static const struct btrfs_fs_feature {
1132         const char *name;
1133         u64 flag;
1134         const char *desc;
1135 } mkfs_features[] = {
1136         { "mixed-bg", BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS,
1137                 "mixed data and metadata block groups" },
1138         { "extref", BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF,
1139                 "increased hardlink limit per file to 65536" },
1140         { "raid56", BTRFS_FEATURE_INCOMPAT_RAID56,
1141                 "raid56 extended format" },
1142         { "skinny-metadata", BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA,
1143                 "reduced-size metadata extent refs" },
1144         { "no-holes", BTRFS_FEATURE_INCOMPAT_NO_HOLES,
1145                 "no explicit hole extents for files" },
1146         /* Keep this one last */
1147         { "list-all", BTRFS_FEATURE_LIST_ALL, NULL }
1148 };
1149
1150 static void list_all_fs_features(void)
1151 {
1152         int i;
1153
1154         fprintf(stderr, "Filesystem features available at mkfs time:\n");
1155         for (i = 0; i < ARRAY_SIZE(mkfs_features) - 1; i++) {
1156                 char *is_default = "";
1157
1158                 if (mkfs_features[i].flag & DEFAULT_MKFS_FEATURES)
1159                         is_default = ", default";
1160                 fprintf(stderr, "%-20s- %s (0x%llx%s)\n",
1161                                 mkfs_features[i].name,
1162                                 mkfs_features[i].desc,
1163                                 mkfs_features[i].flag,
1164                                 is_default);
1165         }
1166 }
1167
1168 static int parse_one_fs_feature(const char *name, u64 *flags)
1169 {
1170         int i;
1171         int found = 0;
1172
1173         for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) {
1174                 if (name[0] == '^' &&
1175                         !strcmp(mkfs_features[i].name, name + 1)) {
1176                         *flags &= ~ mkfs_features[i].flag;
1177                         found = 1;
1178                 } else if (!strcmp(mkfs_features[i].name, name)) {
1179                         *flags |= mkfs_features[i].flag;
1180                         found = 1;
1181                 }
1182         }
1183
1184         return !found;
1185 }
1186
1187 static void process_fs_features(u64 flags)
1188 {
1189         int i;
1190
1191         for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) {
1192                 if (flags & mkfs_features[i].flag) {
1193                         printf("Turning ON incompat feature '%s': %s\n",
1194                                 mkfs_features[i].name,
1195                                 mkfs_features[i].desc);
1196                 }
1197         }
1198 }
1199
1200
1201 /*
1202  * Return NULL if all features were parsed fine, otherwise return the name of
1203  * the first unparsed.
1204  */
1205 static char* parse_fs_features(char *namelist, u64 *flags)
1206 {
1207         char *this_char;
1208         char *save_ptr = NULL; /* Satisfy static checkers */
1209
1210         for (this_char = strtok_r(namelist, ",", &save_ptr);
1211              this_char != NULL;
1212              this_char = strtok_r(NULL, ",", &save_ptr)) {
1213                 if (parse_one_fs_feature(this_char, flags))
1214                         return this_char;
1215         }
1216
1217         return NULL;
1218 }
1219
1220 int main(int ac, char **av)
1221 {
1222         char *file;
1223         struct btrfs_root *root;
1224         struct btrfs_trans_handle *trans;
1225         char *label = NULL;
1226         char *first_file;
1227         u64 block_count = 0;
1228         u64 dev_block_count = 0;
1229         u64 blocks[7];
1230         u64 alloc_start = 0;
1231         u64 metadata_profile = 0;
1232         u64 data_profile = 0;
1233         u32 leafsize = max_t(u32, sysconf(_SC_PAGESIZE), DEFAULT_MKFS_LEAF_SIZE);
1234         u32 sectorsize = 4096;
1235         u32 nodesize = leafsize;
1236         u32 stripesize = 4096;
1237         int zero_end = 1;
1238         int fd;
1239         int ret;
1240         int i;
1241         int mixed = 0;
1242         int leaf_forced = 0;
1243         int data_profile_opt = 0;
1244         int metadata_profile_opt = 0;
1245         int discard = 1;
1246         int ssd = 0;
1247         int force_overwrite = 0;
1248
1249         char *source_dir = NULL;
1250         int source_dir_set = 0;
1251         u64 num_of_meta_chunks = 0;
1252         u64 size_of_data = 0;
1253         u64 source_dir_size = 0;
1254         int dev_cnt = 0;
1255         int saved_optind;
1256         char estr[100];
1257         char *fs_uuid = NULL;
1258         u64 features = DEFAULT_MKFS_FEATURES;
1259
1260         while(1) {
1261                 int c;
1262                 int option_index = 0;
1263                 static const struct option long_options[] = {
1264                         { "alloc-start", 1, NULL, 'A'},
1265                         { "byte-count", 1, NULL, 'b' },
1266                         { "force", 0, NULL, 'f' },
1267                         { "leafsize", 1, NULL, 'l' },
1268                         { "label", 1, NULL, 'L'},
1269                         { "metadata", 1, NULL, 'm' },
1270                         { "mixed", 0, NULL, 'M' },
1271                         { "nodesize", 1, NULL, 'n' },
1272                         { "sectorsize", 1, NULL, 's' },
1273                         { "data", 1, NULL, 'd' },
1274                         { "version", 0, NULL, 'V' },
1275                         { "rootdir", 1, NULL, 'r' },
1276                         { "nodiscard", 0, NULL, 'K' },
1277                         { "features", 1, NULL, 'O' },
1278                         { "uuid", required_argument, NULL, 'U' },
1279                         { NULL, 0, NULL, 0}
1280                 };
1281
1282                 c = getopt_long(ac, av, "A:b:fl:n:s:m:d:L:O:r:U:VMK",
1283                                 long_options, &option_index);
1284                 if (c < 0)
1285                         break;
1286                 switch(c) {
1287                         case 'A':
1288                                 alloc_start = parse_size(optarg);
1289                                 break;
1290                         case 'f':
1291                                 force_overwrite = 1;
1292                                 break;
1293                         case 'd':
1294                                 data_profile = parse_profile(optarg);
1295                                 data_profile_opt = 1;
1296                                 break;
1297                         case 'l':
1298                         case 'n':
1299                                 nodesize = parse_size(optarg);
1300                                 leafsize = parse_size(optarg);
1301                                 leaf_forced = 1;
1302                                 break;
1303                         case 'L':
1304                                 label = parse_label(optarg);
1305                                 break;
1306                         case 'm':
1307                                 metadata_profile = parse_profile(optarg);
1308                                 metadata_profile_opt = 1;
1309                                 break;
1310                         case 'M':
1311                                 mixed = 1;
1312                                 break;
1313                         case 'O': {
1314                                 char *orig = strdup(optarg);
1315                                 char *tmp = orig;
1316
1317                                 tmp = parse_fs_features(tmp, &features);
1318                                 if (tmp) {
1319                                         fprintf(stderr,
1320                                                 "Unrecognized filesystem feature '%s'\n",
1321                                                         tmp);
1322                                         free(orig);
1323                                         exit(1);
1324                                 }
1325                                 free(orig);
1326                                 if (features & BTRFS_FEATURE_LIST_ALL) {
1327                                         list_all_fs_features();
1328                                         exit(0);
1329                                 }
1330                                 break;
1331                                 }
1332                         case 's':
1333                                 sectorsize = parse_size(optarg);
1334                                 break;
1335                         case 'b':
1336                                 block_count = parse_size(optarg);
1337                                 if (block_count <= BTRFS_MKFS_SMALL_VOLUME_SIZE) {
1338                                         fprintf(stdout,
1339                                 "SMALL VOLUME: forcing mixed metadata/data groups\n");
1340                                         mixed = 1;
1341                                 }
1342                                 zero_end = 0;
1343                                 break;
1344                         case 'V':
1345                                 print_version();
1346                                 break;
1347                         case 'r':
1348                                 source_dir = optarg;
1349                                 source_dir_set = 1;
1350                                 break;
1351                         case 'U':
1352                                 fs_uuid = optarg;
1353                                 break;
1354                         case 'K':
1355                                 discard = 0;
1356                                 break;
1357                         default:
1358                                 print_usage();
1359                 }
1360         }
1361         sectorsize = max(sectorsize, (u32)sysconf(_SC_PAGESIZE));
1362         if (check_leaf_or_node_size(leafsize, sectorsize))
1363                 exit(1);
1364         if (check_leaf_or_node_size(nodesize, sectorsize))
1365                 exit(1);
1366         saved_optind = optind;
1367         dev_cnt = ac - optind;
1368         if (dev_cnt == 0)
1369                 print_usage();
1370
1371         if (source_dir_set && dev_cnt > 1) {
1372                 fprintf(stderr,
1373                         "The -r option is limited to a single device\n");
1374                 exit(1);
1375         }
1376
1377         if (fs_uuid) {
1378                 uuid_t dummy_uuid;
1379
1380                 if (uuid_parse(fs_uuid, dummy_uuid) != 0) {
1381                         fprintf(stderr, "could not parse UUID: %s\n", fs_uuid);
1382                         exit(1);
1383                 }
1384                 if (!test_uuid_unique(fs_uuid)) {
1385                         fprintf(stderr, "non-unique UUID: %s\n", fs_uuid);
1386                         exit(1);
1387                 }
1388         }
1389
1390         while (dev_cnt-- > 0) {
1391                 file = av[optind++];
1392                 if (is_block_device(file))
1393                         if (test_dev_for_mkfs(file, force_overwrite, estr)) {
1394                                 fprintf(stderr, "Error: %s", estr);
1395                                 exit(1);
1396                         }
1397         }
1398
1399         optind = saved_optind;
1400         dev_cnt = ac - optind;
1401
1402         file = av[optind++];
1403         ssd = is_ssd(file);
1404
1405         if (is_vol_small(file)) {
1406                 printf("SMALL VOLUME: forcing mixed metadata/data groups\n");
1407                 mixed = 1;
1408         }
1409
1410         /*
1411         * Set default profiles according to number of added devices.
1412         * For mixed groups defaults are single/single.
1413         */
1414         if (!mixed) {
1415                 if (!metadata_profile_opt) {
1416                         if (dev_cnt == 1 && ssd)
1417                                 printf("Detected a SSD, turning off metadata "
1418                                 "duplication.  Mkfs with -m dup if you want to "
1419                                 "force metadata duplication.\n");
1420
1421                         metadata_profile = (dev_cnt > 1) ?
1422                                         BTRFS_BLOCK_GROUP_RAID1 : (ssd) ?
1423                                         0: BTRFS_BLOCK_GROUP_DUP;
1424                 }
1425                 if (!data_profile_opt) {
1426                         data_profile = (dev_cnt > 1) ?
1427                                 BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */
1428                 }
1429         } else {
1430                 u32 best_leafsize = max_t(u32, sysconf(_SC_PAGESIZE), sectorsize);
1431
1432                 if (metadata_profile_opt || data_profile_opt) {
1433                         if (metadata_profile != data_profile) {
1434                                 fprintf(stderr,
1435         "ERROR: With mixed block groups data and metadata profiles must be the same\n");
1436                                 exit(1);
1437                         }
1438                 }
1439
1440                 if (!leaf_forced) {
1441                         leafsize = best_leafsize;
1442                         nodesize = best_leafsize;
1443                         if (check_leaf_or_node_size(leafsize, sectorsize))
1444                                 exit(1);
1445                 }
1446                 if (leafsize != sectorsize) {
1447                         fprintf(stderr, "Error: mixed metadata/data block groups "
1448                                 "require metadata blocksizes equal to the sectorsize\n");
1449                         exit(1);
1450                 }
1451         }
1452
1453         /* Check device/block_count after the leafsize is determined */
1454         if (block_count && block_count < btrfs_min_dev_size(leafsize)) {
1455                 fprintf(stderr,
1456                         "Size '%llu' is too small to make a usable filesystem\n",
1457                         block_count);
1458                 fprintf(stderr,
1459                         "Minimum size for btrfs filesystem is %llu\n",
1460                         btrfs_min_dev_size(leafsize));
1461                 exit(1);
1462         }
1463         for (i = saved_optind; i < saved_optind + dev_cnt; i++) {
1464                 char *path;
1465
1466                 path = av[i];
1467                 ret = test_minimum_size(path, leafsize);
1468                 if (ret < 0) {
1469                         fprintf(stderr, "Failed to check size for '%s': %s\n",
1470                                 path, strerror(-ret));
1471                         exit (1);
1472                 }
1473                 if (ret > 0) {
1474                         fprintf(stderr,
1475                                 "'%s' is too small to make a usable filesystem\n",
1476                                 path);
1477                         fprintf(stderr,
1478                                 "Minimum size for each btrfs device is %llu.\n",
1479                                 btrfs_min_dev_size(leafsize));
1480                         exit(1);
1481                 }
1482         }
1483         ret = test_num_disk_vs_raid(metadata_profile, data_profile,
1484                         dev_cnt, mixed, estr);
1485         if (ret) {
1486                 fprintf(stderr, "Error: %s\n", estr);
1487                 exit(1);
1488         }
1489
1490         /* if we are here that means all devs are good to btrfsify */
1491         printf("%s\n", PACKAGE_STRING);
1492         printf("See %s for more information.\n\n", PACKAGE_URL);
1493
1494         dev_cnt--;
1495
1496         if (!source_dir_set) {
1497                 /*
1498                  * open without O_EXCL so that the problem should not
1499                  * occur by the following processing.
1500                  * (btrfs_register_one_device() fails if O_EXCL is on)
1501                  */
1502                 fd = open(file, O_RDWR);
1503                 if (fd < 0) {
1504                         fprintf(stderr, "unable to open %s: %s\n", file,
1505                                 strerror(errno));
1506                         exit(1);
1507                 }
1508                 first_file = file;
1509                 ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count,
1510                                            block_count, &mixed, discard);
1511                 if (ret) {
1512                         close(fd);
1513                         exit(1);
1514                 }
1515                 if (block_count && block_count > dev_block_count) {
1516                         fprintf(stderr, "%s is smaller than requested size\n", file);
1517                         exit(1);
1518                 }
1519         } else {
1520                 fd = open_target(file);
1521                 if (fd < 0) {
1522                         fprintf(stderr, "unable to open the %s\n", file);
1523                         exit(1);
1524                 }
1525
1526                 first_file = file;
1527                 source_dir_size = size_sourcedir(source_dir, sectorsize,
1528                                              &num_of_meta_chunks, &size_of_data);
1529                 if(block_count < source_dir_size)
1530                         block_count = source_dir_size;
1531                 ret = zero_output_file(fd, block_count, sectorsize);
1532                 if (ret) {
1533                         fprintf(stderr, "unable to zero the output file\n");
1534                         exit(1);
1535                 }
1536                 /* our "device" is the new image file */
1537                 dev_block_count = block_count;
1538         }
1539
1540         /* To create the first block group and chunk 0 in make_btrfs */
1541         if (dev_block_count < BTRFS_MKFS_SYSTEM_GROUP_SIZE) {
1542                 fprintf(stderr, "device is too small to make filesystem\n");
1543                 exit(1);
1544         }
1545
1546         blocks[0] = BTRFS_SUPER_INFO_OFFSET;
1547         for (i = 1; i < 7; i++) {
1548                 blocks[i] = BTRFS_SUPER_INFO_OFFSET + 1024 * 1024 +
1549                         leafsize * i;
1550         }
1551
1552         /*
1553          * FS features that can be set by other means than -O
1554          * just set the bit here
1555          */
1556         if (mixed)
1557                 features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
1558
1559         if ((data_profile | metadata_profile) &
1560             (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
1561                 features |= BTRFS_FEATURE_INCOMPAT_RAID56;
1562         }
1563
1564         process_fs_features(features);
1565
1566         ret = make_btrfs(fd, file, label, fs_uuid, blocks, dev_block_count,
1567                          nodesize, leafsize,
1568                          sectorsize, stripesize, features);
1569         if (ret) {
1570                 fprintf(stderr, "error during mkfs: %s\n", strerror(-ret));
1571                 exit(1);
1572         }
1573
1574         root = open_ctree(file, 0, OPEN_CTREE_WRITES);
1575         if (!root) {
1576                 fprintf(stderr, "Open ctree failed\n");
1577                 close(fd);
1578                 exit(1);
1579         }
1580         root->fs_info->alloc_start = alloc_start;
1581
1582         ret = make_root_dir(root, mixed);
1583         if (ret) {
1584                 fprintf(stderr, "failed to setup the root directory\n");
1585                 exit(1);
1586         }
1587
1588         trans = btrfs_start_transaction(root, 1);
1589
1590         btrfs_register_one_device(file);
1591
1592         if (dev_cnt == 0)
1593                 goto raid_groups;
1594
1595         while (dev_cnt-- > 0) {
1596                 int old_mixed = mixed;
1597
1598                 file = av[optind++];
1599
1600                 /*
1601                  * open without O_EXCL so that the problem should not
1602                  * occur by the following processing.
1603                  * (btrfs_register_one_device() fails if O_EXCL is on)
1604                  */
1605                 fd = open(file, O_RDWR);
1606                 if (fd < 0) {
1607                         fprintf(stderr, "unable to open %s: %s\n", file,
1608                                 strerror(errno));
1609                         exit(1);
1610                 }
1611                 ret = btrfs_device_already_in_root(root, fd,
1612                                                    BTRFS_SUPER_INFO_OFFSET);
1613                 if (ret) {
1614                         fprintf(stderr, "skipping duplicate device %s in FS\n",
1615                                 file);
1616                         close(fd);
1617                         continue;
1618                 }
1619                 ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count,
1620                                            block_count, &mixed, discard);
1621                 if (ret) {
1622                         close(fd);
1623                         exit(1);
1624                 }
1625                 mixed = old_mixed;
1626
1627                 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
1628                                         sectorsize, sectorsize, sectorsize);
1629                 BUG_ON(ret);
1630                 btrfs_register_one_device(file);
1631         }
1632
1633 raid_groups:
1634         if (!source_dir_set) {
1635                 ret = create_raid_groups(trans, root, data_profile,
1636                                  data_profile_opt, metadata_profile,
1637                                  mixed);
1638                 BUG_ON(ret);
1639         }
1640
1641         ret = create_data_reloc_tree(trans, root);
1642         BUG_ON(ret);
1643
1644         printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
1645             "sectorsize %u size %s\n",
1646             label, first_file, nodesize, leafsize, sectorsize,
1647             pretty_size(btrfs_super_total_bytes(root->fs_info->super_copy)));
1648
1649         btrfs_commit_transaction(trans, root);
1650
1651         if (source_dir_set) {
1652                 trans = btrfs_start_transaction(root, 1);
1653                 ret = create_chunks(trans, root,
1654                                     num_of_meta_chunks, size_of_data);
1655                 BUG_ON(ret);
1656                 btrfs_commit_transaction(trans, root);
1657
1658                 ret = make_image(source_dir, root, fd);
1659                 BUG_ON(ret);
1660         }
1661
1662         ret = close_ctree(root);
1663         BUG_ON(ret);
1664         free(label);
1665         return 0;
1666 }