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 <fcntl.h>
  33 #include <unistd.h>
  34 #include <getopt.h>
  35 #include <uuid/uuid.h>
  36 #include <linux/fs.h>
  37 #include <ctype.h>
  38 #include "kerncompat.h"
  39 #include "ctree.h"
  40 #include "disk-io.h"
  41 #include "volumes.h"
  42 #include "transaction.h"
  43 #include "utils.h"
  44 #include "version.h"
  45
  46 static u64 parse_size(char *s)
  47 {
  48         int len = strlen(s);
  49         char c;
  50         u64 mult = 1;
  51
  52         if (!isdigit(s[len - 1])) {
  53                 c = tolower(s[len - 1]);
  54                 switch (c) {
  55                 case 'g':
  56                         mult *= 1024;
  57                 case 'm':
  58                         mult *= 1024;
  59                 case 'k':
  60                         mult *= 1024;
  61                 case 'b':
  62                         break;
  63                 default:
  64                         fprintf(stderr, "Unknown size descriptor %c\n", c);
  65                         exit(1);
  66                 }
  67                 s[len - 1] = '\0';
  68         }
  69         return atol(s) * mult;
  70 }
  71
  72 static int make_root_dir(int fd, const char *device_name) {
  73         struct btrfs_root *root;
  74         struct btrfs_trans_handle *trans;
  75         struct btrfs_key location;
  76         u64 bytes_used;
  77         u64 chunk_start = 0;
  78         u64 chunk_size = 0;
  79         int ret;
  80
  81         root = open_ctree_fd(fd, device_name, 0, O_RDWR);
  82
  83         if (!root) {
  84                 fprintf(stderr, "ctree init failed\n");
  85                 return -1;
  86         }
  87         trans = btrfs_start_transaction(root, 1);
  88         bytes_used = btrfs_super_bytes_used(&root->fs_info->super_copy);
  89
  90         root->fs_info->system_allocs = 1;
  91         ret = btrfs_make_block_group(trans, root, bytes_used,
  92                                      BTRFS_BLOCK_GROUP_SYSTEM,
  93                                      BTRFS_FIRST_CHUNK_TREE_OBJECTID,
  94                                      0, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
  95         BUG_ON(ret);
  96
  97         ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
  98                                 &chunk_start, &chunk_size,
  99                                 BTRFS_BLOCK_GROUP_METADATA);
 100         BUG_ON(ret);
 101         ret = btrfs_make_block_group(trans, root, 0,
 102                                      BTRFS_BLOCK_GROUP_METADATA,
 103                                      BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 104                                      chunk_start, chunk_size);
 105         BUG_ON(ret);
 106
 107         root->fs_info->system_allocs = 0;
 108         btrfs_commit_transaction(trans, root);
 109         trans = btrfs_start_transaction(root, 1);
 110         BUG_ON(!trans);
 111
 112         ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 113                                 &chunk_start, &chunk_size,
 114                                 BTRFS_BLOCK_GROUP_DATA);
 115         BUG_ON(ret);
 116         ret = btrfs_make_block_group(trans, root, 0,
 117                                      BTRFS_BLOCK_GROUP_DATA,
 118                                      BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 119                                      chunk_start, chunk_size);
 120         BUG_ON(ret);
 121
 122         // ret = btrfs_make_block_group(trans, root, 0, 1);
 123         ret = btrfs_make_root_dir(trans, root->fs_info->tree_root,
 124                               BTRFS_ROOT_TREE_DIR_OBJECTID);
 125         if (ret)
 126                 goto err;
 127         ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
 128         if (ret)
 129                 goto err;
 130         memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location));
 131         location.offset = (u64)-1;
 132         ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
 133                         "default", 7,
 134                         btrfs_super_root_dir(&root->fs_info->super_copy),
 135                         &location, BTRFS_FT_DIR);
 136         if (ret)
 137                 goto err;
 138
 139         ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
 140                              "default", 7, location.objectid,
 141                              BTRFS_ROOT_TREE_DIR_OBJECTID, 0);
 142         if (ret)
 143                 goto err;
 144
 145         btrfs_commit_transaction(trans, root);
 146         ret = close_ctree(root);
 147 err:
 148         return ret;
 149 }
 150
 151 static int recow_roots(struct btrfs_trans_handle *trans,
 152                        struct btrfs_root *root)
 153 {
 154         int ret;
 155         struct extent_buffer *tmp;
 156         struct btrfs_fs_info *info = root->fs_info;
 157
 158         ret = __btrfs_cow_block(trans, info->fs_root, info->fs_root->node,
 159                                 NULL, 0, &tmp, 0, 0);
 160         BUG_ON(ret);
 161         free_extent_buffer(tmp);
 162
 163         ret = __btrfs_cow_block(trans, info->tree_root, info->tree_root->node,
 164                                 NULL, 0, &tmp, 0, 0);
 165         BUG_ON(ret);
 166         free_extent_buffer(tmp);
 167
 168         ret = __btrfs_cow_block(trans, info->extent_root,
 169                                 info->extent_root->node, NULL, 0, &tmp, 0, 0);
 170         BUG_ON(ret);
 171         free_extent_buffer(tmp);
 172
 173         ret = __btrfs_cow_block(trans, info->chunk_root, info->chunk_root->node,
 174                                 NULL, 0, &tmp, 0, 0);
 175         BUG_ON(ret);
 176         free_extent_buffer(tmp);
 177
 178
 179         ret = __btrfs_cow_block(trans, info->dev_root, info->dev_root->node,
 180                                 NULL, 0, &tmp, 0, 0);
 181         BUG_ON(ret);
 182         free_extent_buffer(tmp);
 183
 184         return 0;
 185 }
 186
 187 static int create_one_raid_group(struct btrfs_trans_handle *trans,
 188                               struct btrfs_root *root, u64 type)
 189 {
 190         u64 chunk_start;
 191         u64 chunk_size;
 192         int ret;
 193
 194         ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 195                                 &chunk_start, &chunk_size, type);
 196         BUG_ON(ret);
 197         ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
 198                                      type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 199                                      chunk_start, chunk_size);
 200         BUG_ON(ret);
 201         return ret;
 202 }
 203
 204 static int create_raid_groups(struct btrfs_trans_handle *trans,
 205                               struct btrfs_root *root, u64 data_profile,
 206                               u64 metadata_profile)
 207 {
 208         u64 num_devices = btrfs_super_num_devices(&root->fs_info->super_copy);
 209         u64 allowed;
 210         int ret;
 211
 212         if (num_devices == 1)
 213                 allowed = BTRFS_BLOCK_GROUP_DUP;
 214         else if (num_devices >= 4) {
 215                 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
 216                         BTRFS_BLOCK_GROUP_RAID10;
 217         } else
 218                 allowed = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1;
 219
 220         if (allowed & metadata_profile) {
 221                 ret = create_one_raid_group(trans, root,
 222                                             BTRFS_BLOCK_GROUP_SYSTEM |
 223                                             (allowed & metadata_profile));
 224                 BUG_ON(ret);
 225
 226                 ret = create_one_raid_group(trans, root,
 227                                             BTRFS_BLOCK_GROUP_METADATA |
 228                                             (allowed & metadata_profile));
 229                 BUG_ON(ret);
 230
 231                 ret = recow_roots(trans, root);
 232                 BUG_ON(ret);
 233         }
 234         if (num_devices > 1 && (allowed & data_profile)) {
 235                 ret = create_one_raid_group(trans, root,
 236                                             BTRFS_BLOCK_GROUP_DATA |
 237                                             (allowed & data_profile));
 238                 BUG_ON(ret);
 239         }
 240         return 0;
 241 }
 242
 243 static void print_usage(void)
 244 {
 245         fprintf(stderr, "usage: mkfs.btrfs [options] dev [ dev ... ]\n");
 246         fprintf(stderr, "options:\n");
 247         fprintf(stderr, "\t -b --byte-count total number of bytes in the FS\n");
 248         fprintf(stderr, "\t -l --leafsize size of btree leaves\n");
 249         fprintf(stderr, "\t -n --nodesize size of btree leaves\n");
 250         fprintf(stderr, "\t -s --sectorsize min block allocation\n");
 251         fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
 252         exit(1);
 253 }
 254
 255 static u64 parse_profile(char *s)
 256 {
 257         if (strcmp(s, "raid0") == 0) {
 258                 return BTRFS_BLOCK_GROUP_RAID0;
 259         } else if (strcmp(s, "raid1") == 0) {
 260                 return BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_DUP;
 261         } else if (strcmp(s, "raid10") == 0) {
 262                 return BTRFS_BLOCK_GROUP_RAID10 | BTRFS_BLOCK_GROUP_DUP;
 263         } else if (strcmp(s, "single") == 0) {
 264                 return 0;
 265         } else {
 266                 fprintf(stderr, "Unknown option %s\n", s);
 267                 print_usage();
 268         }
 269         return 0;
 270 }
 271
 272 static char *parse_label(char *input)
 273 {
 274         int i;
 275         int len = strlen(input);
 276
 277         if (len > BTRFS_LABEL_SIZE) {
 278                 fprintf(stderr, "Label %s is too long (max %d)\n", input,
 279                         BTRFS_LABEL_SIZE);
 280                 exit(1);
 281         }
 282         for (i = 0; i < len; i++) {
 283                 if (input[i] == '/' || input[i] == '\\') {
 284                         fprintf(stderr, "invalid label %s\n", input);
 285                         exit(1);
 286                 }
 287         }
 288         return strdup(input);
 289 }
 290
 291 static struct option long_options[] = {
 292         { "alloc-start", 1, NULL, 'A'},
 293         { "byte-count", 1, NULL, 'b' },
 294         { "leafsize", 1, NULL, 'l' },
 295         { "label", 1, NULL, 'L'},
 296         { "metadata", 1, NULL, 'm' },
 297         { "nodesize", 1, NULL, 'n' },
 298         { "sectorsize", 1, NULL, 's' },
 299         { "data", 1, NULL, 'd' },
 300         { 0, 0, 0, 0}
 301 };
 302
 303 int main(int ac, char **av)
 304 {
 305         char *file;
 306         struct btrfs_root *root;
 307         struct btrfs_trans_handle *trans;
 308         char *label = NULL;
 309         char *first_file;
 310         u64 block_count = 0;
 311         u64 dev_block_count = 0;
 312         u64 blocks[6];
 313         u64 alloc_start = 0;
 314         u64 metadata_profile = BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_DUP;
 315         u64 data_profile = BTRFS_BLOCK_GROUP_RAID0;
 316         u32 leafsize = getpagesize();
 317         u32 sectorsize = 4096;
 318         u32 nodesize = leafsize;
 319         u32 stripesize = 4096;
 320         int zero_end = 1;
 321         int option_index = 0;
 322         int fd;
 323         int first_fd;
 324         int ret;
 325         int i;
 326
 327         while(1) {
 328                 int c;
 329                 c = getopt_long(ac, av, "A:b:l:n:s:m:d:L:", long_options,
 330                                 &option_index);
 331                 if (c < 0)
 332                         break;
 333                 switch(c) {
 334                         case 'A':
 335                                 alloc_start = parse_size(optarg);
 336                                 break;
 337                         case 'd':
 338                                 data_profile = parse_profile(optarg);
 339                                 break;
 340                         case 'l':
 341                                 leafsize = parse_size(optarg);
 342                                 break;
 343                         case 'L':
 344                                 label = parse_label(optarg);
 345                                 break;
 346                         case 'm':
 347                                 metadata_profile = parse_profile(optarg);
 348                                 break;
 349                         case 'n':
 350                                 nodesize = parse_size(optarg);
 351                                 break;
 352                         case 's':
 353                                 sectorsize = parse_size(optarg);
 354                                 break;
 355                         case 'b':
 356                                 block_count = parse_size(optarg);
 357                                 zero_end = 0;
 358                                 break;
 359                         default:
 360                                 print_usage();
 361                 }
 362         }
 363         sectorsize = max(sectorsize, (u32)getpagesize());
 364         if (leafsize < sectorsize || (leafsize & (sectorsize - 1))) {
 365                 fprintf(stderr, "Illegal leafsize %u\n", leafsize);
 366                 exit(1);
 367         }
 368         if (nodesize < sectorsize || (nodesize & (sectorsize - 1))) {
 369                 fprintf(stderr, "Illegal nodesize %u\n", nodesize);
 370                 exit(1);
 371         }
 372         ac = ac - optind;
 373         if (ac == 0)
 374                 print_usage();
 375
 376         file = av[optind++];
 377         ret = check_mounted(file);
 378         if (ret < 0) {
 379                 fprintf(stderr, "error checking %s mount status\n", file);
 380                 exit(1);
 381         }
 382         if (ret == 1) {
 383                 fprintf(stderr, "%s is mounted\n", file);
 384                 exit(1);
 385         }
 386         ac--;
 387         fd = open(file, O_RDWR);
 388         if (fd < 0) {
 389                 fprintf(stderr, "unable to open %s\n", file);
 390                 exit(1);
 391         }
 392         first_fd = fd;
 393         first_file = file;
 394         ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count);
 395         if (block_count == 0)
 396                 block_count = dev_block_count;
 397
 398         for (i = 0; i < 6; i++)
 399                 blocks[i] = BTRFS_SUPER_INFO_OFFSET + leafsize * i;
 400
 401         ret = make_btrfs(fd, file, label, blocks, block_count,
 402                          nodesize, leafsize,
 403                          sectorsize, stripesize);
 404         if (ret) {
 405                 fprintf(stderr, "error during mkfs %d\n", ret);
 406                 exit(1);
 407         }
 408         ret = make_root_dir(fd, file);
 409         if (ret) {
 410                 fprintf(stderr, "failed to setup the root directory\n");
 411                 exit(1);
 412         }
 413         root = open_ctree(file, 0, O_RDWR);
 414         root->fs_info->alloc_start = alloc_start;
 415         trans = btrfs_start_transaction(root, 1);
 416
 417         if (ac == 0)
 418                 goto raid_groups;
 419
 420         btrfs_register_one_device(file);
 421         if (!root) {
 422                 fprintf(stderr, "ctree init failed\n");
 423                 return -1;
 424         }
 425
 426         zero_end = 1;
 427         while(ac-- > 0) {
 428                 file = av[optind++];
 429                 ret = check_mounted(file);
 430                 if (ret < 0) {
 431                         fprintf(stderr, "error checking %s mount status\n",
 432                                 file);
 433                         exit(1);
 434                 }
 435                 if (ret == 1) {
 436                         fprintf(stderr, "%s is mounted\n", file);
 437                         exit(1);
 438                 }
 439                 fd = open(file, O_RDWR);
 440                 if (fd < 0) {
 441                         fprintf(stderr, "unable to open %s\n", file);
 442                         exit(1);
 443                 }
 444                 ret = btrfs_device_already_in_root(root, fd,
 445                                                    BTRFS_SUPER_INFO_OFFSET);
 446                 if (ret) {
 447                         fprintf(stderr, "skipping duplicate device %s in FS\n",
 448                                 file);
 449                         close(fd);
 450                         continue;
 451                 }
 452                 ret = btrfs_prepare_device(fd, file, zero_end,
 453                                            &dev_block_count);
 454
 455                 BUG_ON(ret);
 456
 457                 ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
 458                                         sectorsize, sectorsize, sectorsize);
 459                 BUG_ON(ret);
 460                 btrfs_register_one_device(file);
 461         }
 462
 463 raid_groups:
 464         ret = create_raid_groups(trans, root, data_profile,
 465                                  metadata_profile);
 466
 467         printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
 468             "sectorsize %u size %s\n",
 469             label, first_file, nodesize, leafsize, sectorsize,
 470             pretty_sizes(btrfs_super_total_bytes(&root->fs_info->super_copy)));
 471
 472         printf("%s\n", BTRFS_BUILD_VERSION);
 473         btrfs_commit_transaction(trans, root);
 474         ret = close_ctree(root);
 475         BUG_ON(ret);
 476
 477         free(label);
 478         return 0;
 479 }
 480