src/installer/hw.c

   1 /*#############################################################################
   2 #                                                                             #
   3 # IPFire - An Open Source Firewall Distribution                               #
   4 # Copyright (C) 2014 IPFire development team                                  #
   5 #                                                                             #
   6 # This program is free software: you can redistribute it and/or modify        #
   7 # it under the terms of the GNU General Public License as published by        #
   8 # the Free Software Foundation, either version 3 of the License, or           #
   9 # (at your option) any later version.                                         #
  10 #                                                                             #
  11 # This program is distributed in the hope that it will be useful,             #
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  14 # GNU General Public License for more details.                                #
  15 #                                                                             #
  16 # You should have received a copy of the GNU General Public License           #
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  18 #                                                                             #
  19 #############################################################################*/
  20
  21 #ifndef _GNU_SOURCE
  22 #define _GNU_SOURCE
  23 #endif
  24
  25 #include <assert.h>
  26 #include <blkid/blkid.h>
  27 #include <fcntl.h>
  28 #include <libudev.h>
  29 #include <math.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <sys/ioctl.h>
  34 #include <sys/mount.h>
  35 #include <sys/swap.h>
  36 #include <unistd.h>
  37
  38 #include <linux/fs.h>
  39
  40 #include <libsmooth.h>
  41
  42 #include "hw.h"
  43
  44 const char* other_filesystems[] = {
  45         "/dev",
  46         "/proc",
  47         "/sys",
  48         NULL
  49 };
  50
  51 static int system_chroot(const char* path, const char* cmd) {
  52         char chroot_cmd[STRING_SIZE];
  53
  54         snprintf(chroot_cmd, sizeof(chroot_cmd), "/usr/sbin/chroot %s %s", path, cmd);
  55
  56         return mysystem(chroot_cmd);
  57 }
  58
  59 struct hw* hw_init() {
  60         struct hw* hw = malloc(sizeof(*hw));
  61         assert(hw);
  62
  63         // Initialize libudev
  64         hw->udev = udev_new();
  65         if (!hw->udev) {
  66                 fprintf(stderr, "Could not create udev instance\n");
  67                 exit(1);
  68         }
  69
  70         return hw;
  71 }
  72
  73 void hw_free(struct hw* hw) {
  74         if (hw->udev)
  75                 udev_unref(hw->udev);
  76
  77         free(hw);
  78 }
  79
  80 static int strstartswith(const char* a, const char* b) {
  81         return (strncmp(a, b, strlen(b)) == 0);
  82 }
  83
  84 int hw_mount(const char* source, const char* target, const char* fs, int flags) {
  85         // Create target if it does not exist
  86         if (access(target, X_OK) != 0)
  87                 mkdir(target, S_IRWXU|S_IRWXG|S_IRWXO);
  88
  89         return mount(source, target, fs, flags, NULL);
  90 }
  91
  92 int hw_umount(const char* target) {
  93         return umount2(target, MNT_DETACH);
  94 }
  95
  96 static int hw_test_source_medium(const char* path) {
  97         int ret = hw_mount(path, SOURCE_MOUNT_PATH, "iso9660", MS_RDONLY);
  98
  99         // If the source could not be mounted we
 100         // cannot proceed.
 101         if (ret != 0)
 102                 return ret;
 103
 104         // Check if the test file exists.
 105         ret = access(SOURCE_TEST_FILE, R_OK);
 106
 107         // Umount the test device.
 108         hw_umount(SOURCE_MOUNT_PATH);
 109
 110         return (ret == 0);
 111 }
 112
 113 char* hw_find_source_medium(struct hw* hw) {
 114         char* ret = NULL;
 115
 116         struct udev_enumerate* enumerate = udev_enumerate_new(hw->udev);
 117
 118         udev_enumerate_add_match_subsystem(enumerate, "block");
 119         udev_enumerate_scan_devices(enumerate);
 120
 121         struct udev_list_entry* devices = udev_enumerate_get_list_entry(enumerate);
 122
 123         struct udev_list_entry* dev_list_entry;
 124         udev_list_entry_foreach(dev_list_entry, devices) {
 125                 const char* path = udev_list_entry_get_name(dev_list_entry);
 126                 struct udev_device* dev = udev_device_new_from_syspath(hw->udev, path);
 127
 128                 const char* dev_path = udev_device_get_devnode(dev);
 129
 130                 // Skip everything what we cannot work with
 131                 if (strstartswith(dev_path, "/dev/loop") || strstartswith(dev_path, "/dev/fd") ||
 132                                 strstartswith(dev_path, "/dev/ram") || strstartswith(dev_path, "/dev/md"))
 133                         continue;
 134
 135                 if (hw_test_source_medium(dev_path) == 0) {
 136                         ret = strdup(dev_path);
 137                 }
 138
 139                 udev_device_unref(dev);
 140
 141                 // If a suitable device was found the search will end.
 142                 if (ret)
 143                         break;
 144         }
 145
 146         udev_enumerate_unref(enumerate);
 147
 148         return ret;
 149 }
 150
 151 static struct hw_disk** hw_create_disks() {
 152         struct hw_disk** ret = malloc(sizeof(*ret) * (HW_MAX_DISKS + 1));
 153
 154         return ret;
 155 }
 156
 157 static unsigned long long hw_block_device_get_size(const char* dev) {
 158         int fd = open(dev, O_RDONLY);
 159         if (fd < 0)
 160                 return 0;
 161
 162         unsigned long long size = blkid_get_dev_size(fd);
 163         close(fd);
 164
 165         return size;
 166 }
 167
 168 struct hw_disk** hw_find_disks(struct hw* hw) {
 169         struct hw_disk** ret = hw_create_disks();
 170         struct hw_disk** disks = ret;
 171
 172         struct udev_enumerate* enumerate = udev_enumerate_new(hw->udev);
 173
 174         udev_enumerate_add_match_subsystem(enumerate, "block");
 175         udev_enumerate_scan_devices(enumerate);
 176
 177         struct udev_list_entry* devices = udev_enumerate_get_list_entry(enumerate);
 178
 179         struct udev_list_entry* dev_list_entry;
 180         unsigned int i = HW_MAX_DISKS;
 181         udev_list_entry_foreach(dev_list_entry, devices) {
 182                 const char* path = udev_list_entry_get_name(dev_list_entry);
 183                 struct udev_device* dev = udev_device_new_from_syspath(hw->udev, path);
 184
 185                 const char* dev_path = udev_device_get_devnode(dev);
 186
 187                 // Skip everything what we cannot work with
 188                 if (strstartswith(dev_path, "/dev/loop") || strstartswith(dev_path, "/dev/fd") ||
 189                                 strstartswith(dev_path, "/dev/ram") || strstartswith(dev_path, "/dev/sr") ||
 190                                 strstartswith(dev_path, "/dev/md")) {
 191                         udev_device_unref(dev);
 192                         continue;
 193                 }
 194
 195                 // DEVTYPE must be disk (otherwise we will see all sorts of partitions here)
 196                 const char* devtype = udev_device_get_property_value(dev, "DEVTYPE");
 197                 if (devtype && (strcmp(devtype, "disk") != 0)) {
 198                         udev_device_unref(dev);
 199                         continue;
 200                 }
 201
 202                 // Skip all source mediums
 203                 if (hw_test_source_medium(dev_path) == 0) {
 204                         udev_device_unref(dev);
 205                         continue;
 206                 }
 207
 208                 // Skip devices with a size of zero
 209                 unsigned long long size = hw_block_device_get_size(dev_path);
 210                 if (size == 0) {
 211                         udev_device_unref(dev);
 212                         continue;
 213                 }
 214
 215                 struct hw_disk* disk = malloc(sizeof(*disk));
 216                 if (disk == NULL)
 217                         return NULL;
 218
 219                 disk->ref = 1;
 220
 221                 strncpy(disk->path, dev_path, sizeof(disk->path));
 222
 223                 disk->size = size;
 224
 225                 // Vendor
 226                 const char* vendor = udev_device_get_property_value(dev, "ID_VENDOR");
 227                 if (!vendor)
 228                         vendor = udev_device_get_sysattr_value(dev, "vendor");
 229                 if (!vendor)
 230                         vendor = udev_device_get_sysattr_value(dev, "manufacturer");
 231                 if (!vendor)
 232                         vendor = "N/A";
 233
 234                 strncpy(disk->vendor, vendor, sizeof(disk->vendor));
 235
 236                 // Model
 237                 const char* model = udev_device_get_property_value(dev, "ID_MODEL");
 238                 if (!model)
 239                         model = udev_device_get_sysattr_value(dev, "model");
 240                 if (!model)
 241                         model = udev_device_get_sysattr_value(dev, "product");
 242                 if (!model)
 243                         model = "N/A";
 244
 245                 strncpy(disk->model, model, sizeof(disk->model));
 246
 247                 snprintf(disk->description, sizeof(disk->description),
 248                         "%4.1fGB %s - %s", (double)disk->size / pow(1024, 3),
 249                         disk->vendor, disk->model);
 250
 251                 *disks++ = disk;
 252
 253                 if (--i == 0)
 254                         break;
 255
 256                 udev_device_unref(dev);
 257         }
 258
 259         udev_enumerate_unref(enumerate);
 260
 261         *disks = NULL;
 262
 263         return ret;
 264 }
 265
 266 void hw_free_disks(struct hw_disk** disks) {
 267         struct hw_disk** disk = disks;
 268
 269         while (*disk != NULL) {
 270                 if (--(*disk)->ref == 0)
 271                         free(*disk);
 272
 273                 disk++;
 274         }
 275
 276         free(disks);
 277 }
 278
 279 unsigned int hw_count_disks(struct hw_disk** disks) {
 280         unsigned int ret = 0;
 281
 282         while (*disks++)
 283                 ret++;
 284
 285         return ret;
 286 }
 287
 288 struct hw_disk** hw_select_disks(struct hw_disk** disks, int* selection) {
 289         struct hw_disk** ret = hw_create_disks();
 290         struct hw_disk** selected_disks = ret;
 291
 292         unsigned int num_disks = hw_count_disks(disks);
 293
 294         for (unsigned int i = 0; i < num_disks; i++) {
 295                 if (selection && selection[i]) {
 296                         struct hw_disk *selected_disk = disks[i];
 297                         selected_disk->ref++;
 298
 299                         *selected_disks++ = selected_disk;
 300                 }
 301         }
 302
 303         // Set sentinel
 304         *selected_disks = NULL;
 305
 306         return ret;
 307 }
 308
 309 static unsigned long long hw_swap_size(struct hw_destination* dest) {
 310         unsigned long long memory = hw_memory();
 311
 312         unsigned long long swap_size = memory / 4;
 313
 314         // Min. swap size is 128MB
 315         if (swap_size < MB2BYTES(128))
 316                 swap_size = MB2BYTES(128);
 317
 318         // Cap swap size to 1GB
 319         else if (swap_size > MB2BYTES(1024))
 320                 swap_size = MB2BYTES(1024);
 321
 322         return swap_size;
 323 }
 324
 325 static unsigned long long hw_root_size(struct hw_destination* dest) {
 326         unsigned long long root_size;
 327
 328         if (dest->size < MB2BYTES(2048))
 329                 root_size = MB2BYTES(1024);
 330
 331         else if (dest->size >= MB2BYTES(2048) && dest->size <= MB2BYTES(3072))
 332                 root_size = MB2BYTES(1536);
 333
 334         else
 335                 root_size = MB2BYTES(2048);
 336
 337         return root_size;
 338 }
 339
 340 static unsigned long long hw_boot_size(struct hw_destination* dest) {
 341         return MB2BYTES(64);
 342 }
 343
 344 static int hw_calculate_partition_table(struct hw_destination* dest) {
 345         char path[DEV_SIZE];
 346         int part_idx = 1;
 347
 348         snprintf(path, sizeof(path), "%s%s", dest->path, (dest->is_raid) ? "p" : "");
 349         dest->part_boot_idx = 0;
 350
 351         // Determine the size of the target block device
 352         if (dest->is_raid) {
 353                 dest->size = (dest->disk1->size >= dest->disk2->size) ?
 354                         dest->disk2->size : dest->disk1->size;
 355
 356                 // The RAID will install some metadata at the end of the disk
 357                 // and we will save up some space for that.
 358                 dest->size -= MB2BYTES(2);
 359         } else {
 360                 dest->size = dest->disk1->size;
 361         }
 362
 363         // As we add some extra space before the beginning of the first
 364         // partition, we need to substract that here.
 365         dest->size -= MB2BYTES(1);
 366
 367         // Add some more space for partition tables, etc.
 368         dest->size -= MB2BYTES(1);
 369
 370         // Determine partition table
 371         dest->part_table = HW_PART_TABLE_MSDOS;
 372
 373         // Disks over 2TB need to use GPT
 374         if (dest->size >= MB2BYTES(2047 * 1024))
 375                 dest->part_table = HW_PART_TABLE_GPT;
 376
 377         // We also use GPT on raid disks by default
 378         else if (dest->is_raid)
 379                 dest->part_table = HW_PART_TABLE_GPT;
 380
 381         // When using GPT, GRUB2 needs a little bit of space to put
 382         // itself in.
 383         if (dest->part_table == HW_PART_TABLE_GPT) {
 384                 snprintf(dest->part_bootldr, sizeof(dest->part_bootldr),
 385                         "%s%d", path, part_idx);
 386
 387                 dest->size_bootldr = MB2BYTES(4);
 388
 389                 dest->part_boot_idx = part_idx++;
 390         } else {
 391                 *dest->part_bootldr = '\0';
 392                 dest->size_bootldr = 0;
 393         }
 394
 395         dest->size_boot = hw_boot_size(dest);
 396         dest->size_swap = hw_swap_size(dest);
 397         dest->size_root = hw_root_size(dest);
 398
 399         // Determine the size of the data partition.
 400         unsigned long long used_space = dest->size_bootldr + dest->size_boot
 401                 + dest->size_swap + dest->size_root;
 402
 403         // Disk is way too small
 404         if (used_space >= dest->size)
 405                 return -1;
 406
 407         dest->size_data = dest->size - used_space;
 408
 409         // If it gets too small, we remove the swap space.
 410         if (dest->size_data <= MB2BYTES(256)) {
 411                 dest->size_data += dest->size_swap;
 412                 dest->size_swap = 0;
 413         }
 414
 415         // Set partition names
 416         if (dest->size_boot > 0) {
 417                 if (dest->part_boot_idx == 0)
 418                         dest->part_boot_idx = part_idx;
 419
 420                 snprintf(dest->part_boot, sizeof(dest->part_boot), "%s%d", path, part_idx++);
 421         } else
 422                 *dest->part_boot = '\0';
 423
 424         if (dest->size_swap > 0)
 425                 snprintf(dest->part_swap, sizeof(dest->part_swap), "%s%d", path, part_idx++);
 426         else
 427                 *dest->part_swap = '\0';
 428
 429         // There is always a root partition
 430         if (dest->part_boot_idx == 0)
 431                 dest->part_boot_idx = part_idx;
 432
 433         snprintf(dest->part_root, sizeof(dest->part_root), "%s%d", path, part_idx++);
 434
 435         if (dest->size_data > 0)
 436                 snprintf(dest->part_data, sizeof(dest->part_data), "%s%d", path, part_idx++);
 437         else
 438                 *dest->part_data = '\0';
 439
 440         return 0;
 441 }
 442
 443 struct hw_destination* hw_make_destination(int part_type, struct hw_disk** disks) {
 444         struct hw_destination* dest = malloc(sizeof(*dest));
 445
 446         if (part_type == HW_PART_TYPE_NORMAL) {
 447                 dest->disk1 = *disks;
 448                 dest->disk2 = NULL;
 449
 450                 strncpy(dest->path, dest->disk1->path, sizeof(dest->path));
 451
 452         } else if (part_type == HW_PART_TYPE_RAID1) {
 453                 dest->disk1 = *disks++;
 454                 dest->disk2 = *disks;
 455                 dest->raid_level = 1;
 456
 457                 snprintf(dest->path, sizeof(dest->path), "/dev/md0");
 458         }
 459
 460         // Is this a RAID device?
 461         dest->is_raid = (part_type > HW_PART_TYPE_NORMAL);
 462
 463         int r = hw_calculate_partition_table(dest);
 464         if (r)
 465                 return NULL;
 466
 467         // Set default filesystem
 468         dest->filesystem = HW_FS_DEFAULT;
 469
 470         return dest;
 471 }
 472
 473 unsigned long long hw_memory() {
 474         FILE* handle = NULL;
 475         char line[STRING_SIZE];
 476
 477         unsigned long long memory = 0;
 478
 479         /* Calculate amount of memory in machine */
 480         if ((handle = fopen("/proc/meminfo", "r"))) {
 481                 while (fgets(line, sizeof(line), handle)) {
 482                         if (!sscanf (line, "MemTotal: %llu kB", &memory)) {
 483                                 memory = 0;
 484                         }
 485                 }
 486
 487                 fclose(handle);
 488         }
 489
 490         return memory * 1024;
 491 }
 492
 493 int hw_create_partitions(struct hw_destination* dest) {
 494         char* cmd = NULL;
 495
 496         asprintf(&cmd, "/usr/sbin/parted -s %s -a optimal", dest->path);
 497
 498         // Set partition type
 499         if (dest->part_table == HW_PART_TABLE_MSDOS)
 500                 asprintf(&cmd, "%s mklabel msdos", cmd);
 501         else if (dest->part_table == HW_PART_TABLE_GPT)
 502                 asprintf(&cmd, "%s mklabel gpt", cmd);
 503
 504         unsigned long long part_start = MB2BYTES(1);
 505
 506         if (*dest->part_bootldr) {
 507                 asprintf(&cmd, "%s mkpart %s ext2 %lluB %lluB", cmd,
 508                         (dest->part_table == HW_PART_TABLE_GPT) ? "BOOTLDR" : "primary",
 509                 part_start, part_start + dest->size_bootldr - 1);
 510
 511                 part_start += dest->size_bootldr;
 512         }
 513
 514         if (*dest->part_boot) {
 515                 asprintf(&cmd, "%s mkpart %s ext2 %lluB %lluB", cmd,
 516                         (dest->part_table == HW_PART_TABLE_GPT) ? "BOOT" : "primary",
 517                         part_start, part_start + dest->size_boot - 1);
 518
 519                 part_start += dest->size_boot;
 520         }
 521
 522         if (*dest->part_swap) {
 523                 asprintf(&cmd, "%s mkpart %s linux-swap %lluB %lluB", cmd,
 524                         (dest->part_table == HW_PART_TABLE_GPT) ? "SWAP" : "primary",
 525                         part_start, part_start + dest->size_swap - 1);
 526
 527                 part_start += dest->size_swap;
 528         }
 529
 530         if (*dest->part_root) {
 531                 asprintf(&cmd, "%s mkpart %s ext2 %lluB %lluB", cmd,
 532                         (dest->part_table == HW_PART_TABLE_GPT) ? "ROOT" : "primary",
 533                         part_start, part_start + dest->size_root - 1);
 534
 535                 part_start += dest->size_root;
 536         }
 537
 538         if (*dest->part_data) {
 539                 asprintf(&cmd, "%s mkpart %s ext2 %lluB %lluB", cmd,
 540                         (dest->part_table == HW_PART_TABLE_GPT) ? "DATA" : "primary",
 541                         part_start, part_start + dest->size_data - 1);
 542
 543                 part_start += dest->size_data;
 544         }
 545
 546         if (dest->part_table == HW_PART_TABLE_MSDOS && dest->part_boot_idx > 0) {
 547                 asprintf(&cmd, "%s set %d boot on", cmd, dest->part_boot_idx);
 548
 549         } else if (dest->part_table == HW_PART_TABLE_GPT) {
 550                 if (*dest->part_bootldr) {
 551                         asprintf(&cmd, "%s set %d bios_grub on", cmd, dest->part_boot_idx);
 552                 }
 553                 asprintf(&cmd, "%s disk_set pmbr_boot on", cmd);
 554         }
 555
 556         int r = mysystem(cmd);
 557
 558         // Wait until the system re-read the partition table
 559         if (r == 0) {
 560                 unsigned int counter = 10;
 561
 562                 while (counter-- > 0) {
 563                         sleep(1);
 564
 565                         if (*dest->part_bootldr && (access(dest->part_bootldr, R_OK) != 0))
 566                                 continue;
 567
 568                         if (*dest->part_boot && (access(dest->part_boot, R_OK) != 0))
 569                                 continue;
 570
 571                         if (*dest->part_swap && (access(dest->part_swap, R_OK) != 0))
 572                                 continue;
 573
 574                         if (*dest->part_root && (access(dest->part_root, R_OK) != 0))
 575                                 continue;
 576
 577                         if (*dest->part_data && (access(dest->part_data, R_OK) != 0))
 578                                 continue;
 579
 580                         // All partitions do exist, exiting the loop.
 581                         break;
 582                 }
 583         }
 584
 585         if (cmd)
 586                 free(cmd);
 587
 588         return r;
 589 }
 590
 591 static int hw_format_filesystem(const char* path, int fs) {
 592         char cmd[STRING_SIZE] = "\0";
 593
 594         // Swap
 595         if (fs == HW_FS_SWAP) {
 596                 snprintf(cmd, sizeof(cmd), "/sbin/mkswap -v1 %s &>/dev/null", path);
 597         // ReiserFS
 598         } else if (fs == HW_FS_REISERFS) {
 599                 snprintf(cmd, sizeof(cmd), "/sbin/mkreiserfs -f %s ", path);
 600
 601         // EXT4
 602         } else if (fs == HW_FS_EXT4) {
 603                 snprintf(cmd, sizeof(cmd), "/sbin/mke2fs -T ext4 %s", path);
 604
 605         // EXT4 w/o journal
 606         } else if (fs == HW_FS_EXT4_WO_JOURNAL) {
 607                 snprintf(cmd, sizeof(cmd), "/sbin/mke2fs -T ext4 -O ^has_journal %s", path);
 608
 609         // XFS
 610         } else if (fs == HW_FS_XFS) {
 611                 snprintf(cmd, sizeof(cmd), "/sbin/mkfs.xfs -f %s", path);
 612         }
 613
 614         assert(*cmd);
 615
 616         int r = mysystem(cmd);
 617
 618         return r;
 619 }
 620
 621 int hw_create_filesystems(struct hw_destination* dest) {
 622         int r;
 623
 624         // boot
 625         if (*dest->part_boot) {
 626                 r = hw_format_filesystem(dest->part_boot, dest->filesystem);
 627                 if (r)
 628                         return r;
 629         }
 630
 631         // swap
 632         if (*dest->part_swap) {
 633                 r = hw_format_filesystem(dest->part_swap, HW_FS_SWAP);
 634                 if (r)
 635                         return r;
 636         }
 637
 638         // root
 639         r = hw_format_filesystem(dest->part_root, dest->filesystem);
 640         if (r)
 641                 return r;
 642
 643         // data
 644         if (*dest->part_data) {
 645                 r = hw_format_filesystem(dest->part_data, dest->filesystem);
 646                 if (r)
 647                         return r;
 648         }
 649
 650         return 0;
 651 }
 652
 653 int hw_mount_filesystems(struct hw_destination* dest, const char* prefix) {
 654         char target[STRING_SIZE];
 655
 656         assert(*prefix == '/');
 657
 658         const char* filesystem;
 659         switch (dest->filesystem) {
 660                 case HW_FS_REISERFS:
 661                         filesystem = "reiserfs";
 662                         break;
 663
 664                 case HW_FS_EXT4:
 665                 case HW_FS_EXT4_WO_JOURNAL:
 666                         filesystem = "ext4";
 667                         break;
 668
 669                 case HW_FS_XFS:
 670                         filesystem = "xfs";
 671                         break;
 672
 673                 default:
 674                         assert(0);
 675         }
 676
 677         // root
 678         int r = hw_mount(dest->part_root, prefix, filesystem, 0);
 679         if (r)
 680                 return r;
 681
 682         // boot
 683         if (*dest->part_boot) {
 684                 snprintf(target, sizeof(target), "%s%s", prefix, HW_PATH_BOOT);
 685                 mkdir(target, S_IRWXU|S_IRWXG|S_IRWXO);
 686
 687                 r = hw_mount(dest->part_boot, target, filesystem, 0);
 688                 if (r) {
 689                         hw_umount_filesystems(dest, prefix);
 690
 691                         return r;
 692                 }
 693         }
 694
 695         // data
 696         if (*dest->part_data) {
 697                 snprintf(target, sizeof(target), "%s%s", prefix, HW_PATH_DATA);
 698                 mkdir(target, S_IRWXU|S_IRWXG|S_IRWXO);
 699
 700                 r = hw_mount(dest->part_data, target, filesystem, 0);
 701                 if (r) {
 702                         hw_umount_filesystems(dest, prefix);
 703
 704                         return r;
 705                 }
 706         }
 707
 708         // swap
 709         if (*dest->part_swap) {
 710                 r = swapon(dest->part_swap, 0);
 711                 if (r) {
 712                         hw_umount_filesystems(dest, prefix);
 713
 714                         return r;
 715                 }
 716         }
 717
 718         // bind-mount misc filesystems
 719         char** otherfs = other_filesystems;
 720         while (*otherfs) {
 721                 snprintf(target, sizeof(target), "%s%s", prefix, *otherfs);
 722
 723                 mkdir(target, S_IRWXU|S_IRWXG|S_IRWXO);
 724                 r = hw_mount(*otherfs, target, NULL, MS_BIND);
 725                 if (r) {
 726                         hw_umount_filesystems(dest, prefix);
 727
 728                         return r;
 729                 }
 730
 731                 otherfs++;
 732         }
 733
 734         return 0;
 735 }
 736
 737 int hw_umount_filesystems(struct hw_destination* dest, const char* prefix) {
 738         // boot
 739         if (*dest->part_boot) {
 740                 hw_umount(dest->part_boot);
 741         }
 742
 743         // data
 744         if (*dest->part_data) {
 745                 hw_umount(dest->part_data);
 746         }
 747
 748         // root
 749         hw_umount(dest->part_root);
 750
 751         // swap
 752         if (*dest->part_swap) {
 753                 swapoff(dest->part_swap);
 754         }
 755
 756         // misc filesystems
 757         char target[STRING_SIZE];
 758         char** otherfs = other_filesystems;
 759
 760         while (*otherfs) {
 761                 snprintf(target, sizeof(target), "%s%s", prefix, *otherfs++);
 762                 hw_umount(target);
 763         }
 764
 765         return 0;
 766 }
 767
 768 int hw_setup_raid(struct hw_destination* dest) {
 769         char* cmd = NULL;
 770
 771         assert(dest->is_raid);
 772
 773         asprintf(&cmd, "echo \"y\" | /sbin/mdadm --create --verbose --metadata=1.2 %s", dest->path);
 774
 775         switch (dest->raid_level) {
 776                 case 1:
 777                         asprintf(&cmd, "%s --level=1 --raid-devices=2", cmd);
 778                         break;
 779
 780                 default:
 781                         assert(0);
 782         }
 783
 784         if (dest->disk1) {
 785                 asprintf(&cmd, "%s %s", cmd, dest->disk1->path);
 786         }
 787
 788         if (dest->disk2) {
 789                 asprintf(&cmd, "%s %s", cmd, dest->disk2->path);
 790         }
 791
 792         int r = mysystem(cmd);
 793         free(cmd);
 794
 795         // Wait a moment until the device has been properly brought up
 796         if (r == 0) {
 797                 unsigned int counter = 10;
 798                 while (counter-- > 0) {
 799                         sleep(1);
 800
 801                         // If the raid device has not yet been properly brought up,
 802                         // opening it will fail with the message: Device or resource busy
 803                         // Hence we will wait a bit until it becomes usable.
 804                         FILE* f = fopen(dest->path, "r");
 805                         if (f) {
 806                                 fclose(f);
 807                                 break;
 808                         }
 809                 }
 810         }
 811
 812         return r;
 813 }
 814
 815 int hw_stop_all_raid_arrays() {
 816         return mysystem("/sbin/mdadm --stop --scan");
 817 }
 818
 819 int hw_install_bootloader(struct hw_destination* dest) {
 820         char cmd[STRING_SIZE];
 821         int r;
 822
 823         // Generate configuration file
 824         snprintf(cmd, sizeof(cmd), "/usr/sbin/grub-mkconfig -o /boot/grub/grub.cfg");
 825         r = system_chroot(DESTINATION_MOUNT_PATH, cmd);
 826         if (r)
 827                 return r;
 828
 829         char cmd_grub[STRING_SIZE];
 830         snprintf(cmd_grub, sizeof(cmd_grub), "/usr/sbin/grub-install --no-floppy --recheck");
 831
 832         if (dest->is_raid && (dest->part_table == HW_PART_TABLE_MSDOS)) {
 833                 snprintf(cmd, sizeof(cmd), "%s %s", cmd_grub, dest->disk1->path);
 834                 r = system_chroot(DESTINATION_MOUNT_PATH, cmd);
 835                 if (r)
 836                         return r;
 837
 838                 snprintf(cmd, sizeof(cmd), "%s %s", cmd_grub, dest->disk2->path);
 839                 r = system_chroot(DESTINATION_MOUNT_PATH, cmd);
 840         } else {
 841                 snprintf(cmd, sizeof(cmd), "%s %s", cmd_grub, dest->path);
 842                 r = system_chroot(DESTINATION_MOUNT_PATH, cmd);
 843         }
 844
 845         return r;
 846 }
 847
 848 static char* hw_get_uuid(const char* dev) {
 849         blkid_probe p = blkid_new_probe_from_filename(dev);
 850         const char* buffer = NULL;
 851         char* uuid = NULL;
 852
 853         if (!p)
 854                 return NULL;
 855
 856         blkid_do_probe(p);
 857         blkid_probe_lookup_value(p, "UUID", &buffer, NULL);
 858
 859         if (buffer)
 860                 uuid = strdup(buffer);
 861
 862         blkid_free_probe(p);
 863
 864         return uuid;
 865 }
 866
 867 int hw_write_fstab(struct hw_destination* dest) {
 868         FILE* f = fopen(DESTINATION_MOUNT_PATH "/etc/fstab", "w");
 869         if (!f)
 870                 return -1;
 871
 872         const char* fmt = "UUID=%s %-8s %-4s %-10s %d %d\n";
 873         char* uuid = NULL;
 874
 875         // boot
 876         if (*dest->part_boot) {
 877                 uuid = hw_get_uuid(dest->part_boot);
 878
 879                 if (uuid) {
 880                         fprintf(f, fmt, uuid, "/boot", "auto", "defaults", 1, 2);
 881                         free(uuid);
 882                 }
 883         }
 884
 885         // swap
 886         if (*dest->part_swap) {
 887                 uuid = hw_get_uuid(dest->part_swap);
 888
 889                 if (uuid) {
 890                         fprintf(f, fmt, uuid, "swap", "swap", "defaults,pri=1", 0, 0);
 891                         free(uuid);
 892                 }
 893         }
 894
 895         // root
 896         uuid = hw_get_uuid(dest->part_root);
 897         if (uuid) {
 898                 fprintf(f, fmt, uuid, "/", "auto", "defaults", 1, 1);
 899                 free(uuid);
 900         }
 901
 902         // data
 903         if (*dest->part_data) {
 904                 uuid = hw_get_uuid(dest->part_data);
 905
 906                 if (uuid) {
 907                         fprintf(f, fmt, uuid, "/var", "auto", "defaults", 1, 1);
 908                         free(uuid);
 909                 }
 910         }
 911
 912         fclose(f);
 913
 914         return 0;
 915 }