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* output, 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(output, 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, 0);
  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, const char* sourcedrive) {
 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                 // Skip sourcedrive if we need to
 196                 if (sourcedrive && (strcmp(dev_path, sourcedrive) == 0)) {
 197                         udev_device_unref(dev);
 198                         continue;
 199                 }
 200
 201                 // DEVTYPE must be disk (otherwise we will see all sorts of partitions here)
 202                 const char* devtype = udev_device_get_property_value(dev, "DEVTYPE");
 203                 if (devtype && (strcmp(devtype, "disk") != 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                 const char* p = disk->path + 5;
 223
 224                 disk->size = size;
 225
 226                 // Vendor
 227                 const char* vendor = udev_device_get_property_value(dev, "ID_VENDOR");
 228                 if (!vendor)
 229                         vendor = udev_device_get_sysattr_value(dev, "vendor");
 230                 if (!vendor)
 231                         vendor = udev_device_get_sysattr_value(dev, "manufacturer");
 232
 233                 if (vendor)
 234                         strncpy(disk->vendor, vendor, sizeof(disk->vendor));
 235                 else
 236                         *disk->vendor = '\0';
 237
 238                 // Model
 239                 const char* model = udev_device_get_property_value(dev, "ID_MODEL");
 240                 if (!model)
 241                         model = udev_device_get_sysattr_value(dev, "model");
 242                 if (!model)
 243                         model = udev_device_get_sysattr_value(dev, "product");
 244
 245                 if (model)
 246                         strncpy(disk->model, model, sizeof(disk->model));
 247                 else
 248                         *disk->model = '\0';
 249
 250                 // Format description
 251                 char size_str[STRING_SIZE];
 252                 snprintf(size_str, sizeof(size_str), "%4.1fGB", (double)disk->size / pow(1024, 3));
 253
 254                 if (*disk->vendor && *disk->model) {
 255                         snprintf(disk->description, sizeof(disk->description),
 256                                 "%s - %s - %s - %s", size_str, p, disk->vendor, disk->model);
 257
 258                 } else if (*disk->vendor || *disk->model) {
 259                         snprintf(disk->description, sizeof(disk->description),
 260                                 "%s - %s - %s", size_str, p, (*disk->vendor) ? disk->vendor : disk->model);
 261
 262                 } else {
 263                         snprintf(disk->description, sizeof(disk->description),
 264                                 "%s - %s", size_str, p);
 265                 }
 266
 267                 *disks++ = disk;
 268
 269                 if (--i == 0)
 270                         break;
 271
 272                 udev_device_unref(dev);
 273         }
 274
 275         udev_enumerate_unref(enumerate);
 276
 277         *disks = NULL;
 278
 279         return ret;
 280 }
 281
 282 void hw_free_disks(struct hw_disk** disks) {
 283         struct hw_disk** disk = disks;
 284
 285         while (*disk != NULL) {
 286                 if (--(*disk)->ref == 0)
 287                         free(*disk);
 288
 289                 disk++;
 290         }
 291
 292         free(disks);
 293 }
 294
 295 unsigned int hw_count_disks(struct hw_disk** disks) {
 296         unsigned int ret = 0;
 297
 298         while (*disks++)
 299                 ret++;
 300
 301         return ret;
 302 }
 303
 304 struct hw_disk** hw_select_disks(struct hw_disk** disks, int* selection) {
 305         struct hw_disk** ret = hw_create_disks();
 306         struct hw_disk** selected_disks = ret;
 307
 308         unsigned int num_disks = hw_count_disks(disks);
 309
 310         for (unsigned int i = 0; i < num_disks; i++) {
 311                 if (!selection || selection[i]) {
 312                         struct hw_disk *selected_disk = disks[i];
 313                         selected_disk->ref++;
 314
 315                         *selected_disks++ = selected_disk;
 316                 }
 317         }
 318
 319         // Set sentinel
 320         *selected_disks = NULL;
 321
 322         return ret;
 323 }
 324
 325 static unsigned long long hw_swap_size(struct hw_destination* dest) {
 326         unsigned long long memory = hw_memory();
 327
 328         unsigned long long swap_size = memory / 4;
 329
 330         // Min. swap size is 128MB
 331         if (swap_size < MB2BYTES(128))
 332                 swap_size = MB2BYTES(128);
 333
 334         // Cap swap size to 1GB
 335         else if (swap_size > MB2BYTES(1024))
 336                 swap_size = MB2BYTES(1024);
 337
 338         return swap_size;
 339 }
 340
 341 static unsigned long long hw_root_size(struct hw_destination* dest) {
 342         unsigned long long root_size;
 343
 344         if (dest->size < MB2BYTES(2048))
 345                 root_size = MB2BYTES(1024);
 346
 347         else if (dest->size >= MB2BYTES(2048) && dest->size <= MB2BYTES(3072))
 348                 root_size = MB2BYTES(1536);
 349
 350         else
 351                 root_size = MB2BYTES(2048);
 352
 353         return root_size;
 354 }
 355
 356 static unsigned long long hw_boot_size(struct hw_destination* dest) {
 357         return MB2BYTES(64);
 358 }
 359
 360 static int hw_calculate_partition_table(struct hw_destination* dest) {
 361         char path[DEV_SIZE];
 362         int part_idx = 1;
 363
 364         snprintf(path, sizeof(path), "%s%s", dest->path, (dest->is_raid) ? "p" : "");
 365         dest->part_boot_idx = 0;
 366
 367         // Determine the size of the target block device
 368         if (dest->is_raid) {
 369                 dest->size = (dest->disk1->size >= dest->disk2->size) ?
 370                         dest->disk2->size : dest->disk1->size;
 371
 372                 // The RAID will install some metadata at the end of the disk
 373                 // and we will save up some space for that.
 374                 dest->size -= MB2BYTES(2);
 375         } else {
 376                 dest->size = dest->disk1->size;
 377         }
 378
 379         // As we add some extra space before the beginning of the first
 380         // partition, we need to substract that here.
 381         dest->size -= MB2BYTES(1);
 382
 383         // Add some more space for partition tables, etc.
 384         dest->size -= MB2BYTES(1);
 385
 386         // Determine partition table
 387         dest->part_table = HW_PART_TABLE_MSDOS;
 388
 389         // Disks over 2TB need to use GPT
 390         if (dest->size >= MB2BYTES(2047 * 1024))
 391                 dest->part_table = HW_PART_TABLE_GPT;
 392
 393         // We also use GPT on raid disks by default
 394         else if (dest->is_raid)
 395                 dest->part_table = HW_PART_TABLE_GPT;
 396
 397         // When using GPT, GRUB2 needs a little bit of space to put
 398         // itself in.
 399         if (dest->part_table == HW_PART_TABLE_GPT) {
 400                 snprintf(dest->part_bootldr, sizeof(dest->part_bootldr),
 401                         "%s%d", path, part_idx);
 402
 403                 dest->size_bootldr = MB2BYTES(4);
 404
 405                 dest->part_boot_idx = part_idx++;
 406         } else {
 407                 *dest->part_bootldr = '\0';
 408                 dest->size_bootldr = 0;
 409         }
 410
 411         dest->size_boot = hw_boot_size(dest);
 412         dest->size_swap = hw_swap_size(dest);
 413         dest->size_root = hw_root_size(dest);
 414
 415         // Determine the size of the data partition.
 416         unsigned long long used_space = dest->size_bootldr + dest->size_boot
 417                 + dest->size_swap + dest->size_root;
 418
 419         // Disk is way too small
 420         if (used_space >= dest->size)
 421                 return -1;
 422
 423         dest->size_data = dest->size - used_space;
 424
 425         // If it gets too small, we remove the swap space.
 426         if (dest->size_data <= MB2BYTES(256)) {
 427                 dest->size_data += dest->size_swap;
 428                 dest->size_swap = 0;
 429         }
 430
 431         // Set partition names
 432         if (dest->size_boot > 0) {
 433                 if (dest->part_boot_idx == 0)
 434                         dest->part_boot_idx = part_idx;
 435
 436                 snprintf(dest->part_boot, sizeof(dest->part_boot), "%s%d", path, part_idx++);
 437         } else
 438                 *dest->part_boot = '\0';
 439
 440         if (dest->size_swap > 0)
 441                 snprintf(dest->part_swap, sizeof(dest->part_swap), "%s%d", path, part_idx++);
 442         else
 443                 *dest->part_swap = '\0';
 444
 445         // There is always a root partition
 446         if (dest->part_boot_idx == 0)
 447                 dest->part_boot_idx = part_idx;
 448
 449         snprintf(dest->part_root, sizeof(dest->part_root), "%s%d", path, part_idx++);
 450
 451         if (dest->size_data > 0)
 452                 snprintf(dest->part_data, sizeof(dest->part_data), "%s%d", path, part_idx++);
 453         else
 454                 *dest->part_data = '\0';
 455
 456         return 0;
 457 }
 458
 459 struct hw_destination* hw_make_destination(int part_type, struct hw_disk** disks) {
 460         struct hw_destination* dest = malloc(sizeof(*dest));
 461
 462         if (part_type == HW_PART_TYPE_NORMAL) {
 463                 dest->disk1 = *disks;
 464                 dest->disk2 = NULL;
 465
 466                 strncpy(dest->path, dest->disk1->path, sizeof(dest->path));
 467
 468         } else if (part_type == HW_PART_TYPE_RAID1) {
 469                 dest->disk1 = *disks++;
 470                 dest->disk2 = *disks;
 471                 dest->raid_level = 1;
 472
 473                 snprintf(dest->path, sizeof(dest->path), "/dev/md0");
 474         }
 475
 476         // Is this a RAID device?
 477         dest->is_raid = (part_type > HW_PART_TYPE_NORMAL);
 478
 479         int r = hw_calculate_partition_table(dest);
 480         if (r)
 481                 return NULL;
 482
 483         // Set default filesystem
 484         dest->filesystem = HW_FS_DEFAULT;
 485
 486         return dest;
 487 }
 488
 489 unsigned long long hw_memory() {
 490         FILE* handle = NULL;
 491         char line[STRING_SIZE];
 492
 493         unsigned long long memory = 0;
 494
 495         /* Calculate amount of memory in machine */
 496         if ((handle = fopen("/proc/meminfo", "r"))) {
 497                 while (fgets(line, sizeof(line), handle)) {
 498                         if (!sscanf (line, "MemTotal: %llu kB", &memory)) {
 499                                 memory = 0;
 500                         }
 501                 }
 502
 503                 fclose(handle);
 504         }
 505
 506         return memory * 1024;
 507 }
 508
 509 static int hw_zero_out_device(const char* path, int bytes) {
 510         char block[512];
 511         memset(block, 0, sizeof(block));
 512
 513         int blocks = bytes / sizeof(block);
 514
 515         int fd = open(path, O_WRONLY);
 516         if (fd < 0)
 517                 return -1;
 518
 519         unsigned int bytes_written = 0;
 520         while (blocks-- > 0) {
 521                 bytes_written += write(fd, block, sizeof(block));
 522         }
 523
 524         fsync(fd);
 525         close(fd);
 526
 527         return bytes_written;
 528 }
 529
 530 static int try_open(const char* path) {
 531         FILE* f = fopen(path, "r");
 532         if (f) {
 533                 fclose(f);
 534                 return 0;
 535         }
 536
 537         return -1;
 538 }
 539
 540 int hw_create_partitions(struct hw_destination* dest, const char* output) {
 541         // Before we write a new partition table to the disk, we will erase
 542         // the first couple of megabytes at the beginning of the device to
 543         // get rid of all left other things like bootloaders and partition tables.
 544         // This solves some problems when changing from MBR to GPT partitions or
 545         // the other way around.
 546         int r = hw_zero_out_device(dest->path, MB2BYTES(10));
 547         if (r <= 0)
 548                 return r;
 549
 550         char* cmd = NULL;
 551         asprintf(&cmd, "/usr/sbin/parted -s %s -a optimal", dest->path);
 552
 553         // Set partition type
 554         if (dest->part_table == HW_PART_TABLE_MSDOS)
 555                 asprintf(&cmd, "%s mklabel msdos", cmd);
 556         else if (dest->part_table == HW_PART_TABLE_GPT)
 557                 asprintf(&cmd, "%s mklabel gpt", cmd);
 558
 559         unsigned long long part_start = MB2BYTES(1);
 560
 561         if (*dest->part_bootldr) {
 562                 asprintf(&cmd, "%s mkpart %s ext2 %lluB %lluB", cmd,
 563                         (dest->part_table == HW_PART_TABLE_GPT) ? "BOOTLDR" : "primary",
 564                 part_start, part_start + dest->size_bootldr - 1);
 565
 566                 part_start += dest->size_bootldr;
 567         }
 568
 569         if (*dest->part_boot) {
 570                 asprintf(&cmd, "%s mkpart %s ext2 %lluB %lluB", cmd,
 571                         (dest->part_table == HW_PART_TABLE_GPT) ? "BOOT" : "primary",
 572                         part_start, part_start + dest->size_boot - 1);
 573
 574                 part_start += dest->size_boot;
 575         }
 576
 577         if (*dest->part_swap) {
 578                 asprintf(&cmd, "%s mkpart %s linux-swap %lluB %lluB", cmd,
 579                         (dest->part_table == HW_PART_TABLE_GPT) ? "SWAP" : "primary",
 580                         part_start, part_start + dest->size_swap - 1);
 581
 582                 part_start += dest->size_swap;
 583         }
 584
 585         if (*dest->part_root) {
 586                 asprintf(&cmd, "%s mkpart %s ext2 %lluB %lluB", cmd,
 587                         (dest->part_table == HW_PART_TABLE_GPT) ? "ROOT" : "primary",
 588                         part_start, part_start + dest->size_root - 1);
 589
 590                 part_start += dest->size_root;
 591         }
 592
 593         if (*dest->part_data) {
 594                 asprintf(&cmd, "%s mkpart %s ext2 %lluB %lluB", cmd,
 595                         (dest->part_table == HW_PART_TABLE_GPT) ? "DATA" : "primary",
 596                         part_start, part_start + dest->size_data - 1);
 597
 598                 part_start += dest->size_data;
 599         }
 600
 601         if (dest->part_boot_idx > 0)
 602                 asprintf(&cmd, "%s set %d boot on", cmd, dest->part_boot_idx);
 603
 604         if (dest->part_table == HW_PART_TABLE_GPT) {
 605                 if (*dest->part_bootldr) {
 606                         asprintf(&cmd, "%s set %d bios_grub on", cmd, dest->part_boot_idx);
 607                 }
 608                 asprintf(&cmd, "%s disk_set pmbr_boot on", cmd);
 609         }
 610
 611         r = mysystem(output, cmd);
 612
 613         // Wait until the system re-read the partition table
 614         if (r == 0) {
 615                 unsigned int counter = 10;
 616
 617                 while (counter-- > 0) {
 618                         sleep(1);
 619
 620                         if (*dest->part_bootldr && (try_open(dest->part_bootldr) != 0))
 621                                 continue;
 622
 623                         if (*dest->part_boot && (try_open(dest->part_boot) != 0))
 624                                 continue;
 625
 626                         if (*dest->part_swap && (try_open(dest->part_swap) != 0))
 627                                 continue;
 628
 629                         if (*dest->part_root && (try_open(dest->part_root) != 0))
 630                                 continue;
 631
 632                         if (*dest->part_data && (try_open(dest->part_data) != 0))
 633                                 continue;
 634
 635                         // All partitions do exist, exiting the loop.
 636                         break;
 637                 }
 638         }
 639
 640         if (cmd)
 641                 free(cmd);
 642
 643         return r;
 644 }
 645
 646 static int hw_format_filesystem(const char* path, int fs, const char* output) {
 647         char cmd[STRING_SIZE] = "\0";
 648
 649         // Swap
 650         if (fs == HW_FS_SWAP) {
 651                 snprintf(cmd, sizeof(cmd), "/sbin/mkswap -v1 %s &>/dev/null", path);
 652         // ReiserFS
 653         } else if (fs == HW_FS_REISERFS) {
 654                 snprintf(cmd, sizeof(cmd), "/sbin/mkreiserfs -f %s ", path);
 655
 656         // EXT4
 657         } else if (fs == HW_FS_EXT4) {
 658                 snprintf(cmd, sizeof(cmd), "/sbin/mke2fs -T ext4 %s", path);
 659
 660         // EXT4 w/o journal
 661         } else if (fs == HW_FS_EXT4_WO_JOURNAL) {
 662                 snprintf(cmd, sizeof(cmd), "/sbin/mke2fs -T ext4 -O ^has_journal %s", path);
 663
 664         // XFS
 665         } else if (fs == HW_FS_XFS) {
 666                 snprintf(cmd, sizeof(cmd), "/sbin/mkfs.xfs -f %s", path);
 667         }
 668
 669         assert(*cmd);
 670
 671         int r = mysystem(output, cmd);
 672
 673         return r;
 674 }
 675
 676 int hw_create_filesystems(struct hw_destination* dest, const char* output) {
 677         int r;
 678
 679         // boot
 680         if (*dest->part_boot) {
 681                 r = hw_format_filesystem(dest->part_boot, dest->filesystem, output);
 682                 if (r)
 683                         return r;
 684         }
 685
 686         // swap
 687         if (*dest->part_swap) {
 688                 r = hw_format_filesystem(dest->part_swap, HW_FS_SWAP, output);
 689                 if (r)
 690                         return r;
 691         }
 692
 693         // root
 694         r = hw_format_filesystem(dest->part_root, dest->filesystem, output);
 695         if (r)
 696                 return r;
 697
 698         // data
 699         if (*dest->part_data) {
 700                 r = hw_format_filesystem(dest->part_data, dest->filesystem, output);
 701                 if (r)
 702                         return r;
 703         }
 704
 705         return 0;
 706 }
 707
 708 int hw_mount_filesystems(struct hw_destination* dest, const char* prefix) {
 709         char target[STRING_SIZE];
 710
 711         assert(*prefix == '/');
 712
 713         const char* filesystem;
 714         switch (dest->filesystem) {
 715                 case HW_FS_REISERFS:
 716                         filesystem = "reiserfs";
 717                         break;
 718
 719                 case HW_FS_EXT4:
 720                 case HW_FS_EXT4_WO_JOURNAL:
 721                         filesystem = "ext4";
 722                         break;
 723
 724                 case HW_FS_XFS:
 725                         filesystem = "xfs";
 726                         break;
 727
 728                 default:
 729                         assert(0);
 730         }
 731
 732         // root
 733         int r = hw_mount(dest->part_root, prefix, filesystem, 0);
 734         if (r)
 735                 return r;
 736
 737         // boot
 738         if (*dest->part_boot) {
 739                 snprintf(target, sizeof(target), "%s%s", prefix, HW_PATH_BOOT);
 740                 mkdir(target, S_IRWXU|S_IRWXG|S_IRWXO);
 741
 742                 r = hw_mount(dest->part_boot, target, filesystem, 0);
 743                 if (r) {
 744                         hw_umount_filesystems(dest, prefix);
 745
 746                         return r;
 747                 }
 748         }
 749
 750         // data
 751         if (*dest->part_data) {
 752                 snprintf(target, sizeof(target), "%s%s", prefix, HW_PATH_DATA);
 753                 mkdir(target, S_IRWXU|S_IRWXG|S_IRWXO);
 754
 755                 r = hw_mount(dest->part_data, target, filesystem, 0);
 756                 if (r) {
 757                         hw_umount_filesystems(dest, prefix);
 758
 759                         return r;
 760                 }
 761         }
 762
 763         // swap
 764         if (*dest->part_swap) {
 765                 r = swapon(dest->part_swap, 0);
 766                 if (r) {
 767                         hw_umount_filesystems(dest, prefix);
 768
 769                         return r;
 770                 }
 771         }
 772
 773         // bind-mount misc filesystems
 774         char** otherfs = other_filesystems;
 775         while (*otherfs) {
 776                 snprintf(target, sizeof(target), "%s%s", prefix, *otherfs);
 777
 778                 mkdir(target, S_IRWXU|S_IRWXG|S_IRWXO);
 779                 r = hw_mount(*otherfs, target, NULL, MS_BIND);
 780                 if (r) {
 781                         hw_umount_filesystems(dest, prefix);
 782
 783                         return r;
 784                 }
 785
 786                 otherfs++;
 787         }
 788
 789         return 0;
 790 }
 791
 792 int hw_umount_filesystems(struct hw_destination* dest, const char* prefix) {
 793         // Write all buffers to disk before umounting
 794         hw_sync();
 795
 796         // boot
 797         if (*dest->part_boot) {
 798                 hw_umount(dest->part_boot);
 799         }
 800
 801         // data
 802         if (*dest->part_data) {
 803                 hw_umount(dest->part_data);
 804         }
 805
 806         // root
 807         hw_umount(dest->part_root);
 808
 809         // swap
 810         if (*dest->part_swap) {
 811                 swapoff(dest->part_swap);
 812         }
 813
 814         // misc filesystems
 815         char target[STRING_SIZE];
 816         char** otherfs = other_filesystems;
 817
 818         while (*otherfs) {
 819                 snprintf(target, sizeof(target), "%s%s", prefix, *otherfs++);
 820                 hw_umount(target);
 821         }
 822
 823         return 0;
 824 }
 825
 826 int hw_destroy_raid_superblocks(const struct hw_destination* dest, const char* output) {
 827         char cmd[STRING_SIZE];
 828
 829         hw_stop_all_raid_arrays(output);
 830         hw_stop_all_raid_arrays(output);
 831
 832         if (dest->disk1) {
 833                 snprintf(cmd, sizeof(cmd), "/sbin/mdadm --zero-superblock %s", dest->disk1->path);
 834                 mysystem(output, cmd);
 835         }
 836
 837         if (dest->disk2) {
 838                 snprintf(cmd, sizeof(cmd), "/sbin/mdadm --zero-superblock %s", dest->disk2->path);
 839                 mysystem(output, cmd);
 840         }
 841
 842         return 0;
 843 }
 844
 845 int hw_setup_raid(struct hw_destination* dest, const char* output) {
 846         char* cmd = NULL;
 847         int r;
 848
 849         assert(dest->is_raid);
 850
 851         // Stop all RAID arrays that might be around (again).
 852         // It seems that there is some sort of race-condition with udev re-enabling
 853         // the raid arrays and therefore locking the disks.
 854         r = hw_destroy_raid_superblocks(dest, output);
 855
 856         asprintf(&cmd, "echo \"y\" | /sbin/mdadm --create --verbose --metadata=%s --auto=mdp %s",
 857                 RAID_METADATA, dest->path);
 858
 859         switch (dest->raid_level) {
 860                 case 1:
 861                         asprintf(&cmd, "%s --level=1 --raid-devices=2", cmd);
 862                         break;
 863
 864                 default:
 865                         assert(0);
 866         }
 867
 868         if (dest->disk1) {
 869                 asprintf(&cmd, "%s %s", cmd, dest->disk1->path);
 870
 871                 // Clear all data at the beginning
 872                 r = hw_zero_out_device(dest->disk1->path, MB2BYTES(10));
 873                 if (r <= 0)
 874                         return r;
 875         }
 876
 877         if (dest->disk2) {
 878                 asprintf(&cmd, "%s %s", cmd, dest->disk2->path);
 879
 880                 // Clear all data at the beginning
 881                 r = hw_zero_out_device(dest->disk2->path, MB2BYTES(10));
 882                 if (r <= 0)
 883                         return r;
 884         }
 885
 886         r = mysystem(output, cmd);
 887         free(cmd);
 888
 889         // Wait a moment until the device has been properly brought up
 890         if (r == 0) {
 891                 unsigned int counter = 10;
 892                 while (counter-- > 0) {
 893                         sleep(1);
 894
 895                         // If the raid device has not yet been properly brought up,
 896                         // opening it will fail with the message: Device or resource busy
 897                         // Hence we will wait a bit until it becomes usable.
 898                         if (try_open(dest->path) == 0)
 899                                 break;
 900                 }
 901         }
 902
 903         return r;
 904 }
 905
 906 int hw_stop_all_raid_arrays(const char* output) {
 907         return mysystem(output, "/sbin/mdadm --stop --scan --verbose");
 908 }
 909
 910 int hw_install_bootloader(struct hw_destination* dest, const char* output) {
 911         char cmd[STRING_SIZE];
 912         int r;
 913
 914         // Generate configuration file
 915         snprintf(cmd, sizeof(cmd), "/usr/sbin/grub-mkconfig -o /boot/grub/grub.cfg");
 916         r = system_chroot(output, DESTINATION_MOUNT_PATH, cmd);
 917         if (r)
 918                 return r;
 919
 920         char cmd_grub[STRING_SIZE];
 921         snprintf(cmd_grub, sizeof(cmd_grub), "/usr/sbin/grub-install --no-floppy --recheck");
 922
 923         if (dest->is_raid) {
 924                 snprintf(cmd, sizeof(cmd), "%s %s", cmd_grub, dest->disk1->path);
 925                 r = system_chroot(output, DESTINATION_MOUNT_PATH, cmd);
 926                 if (r)
 927                         return r;
 928
 929                 snprintf(cmd, sizeof(cmd), "%s %s", cmd_grub, dest->disk2->path);
 930                 r = system_chroot(output, DESTINATION_MOUNT_PATH, cmd);
 931         } else {
 932                 snprintf(cmd, sizeof(cmd), "%s %s", cmd_grub, dest->path);
 933                 r = system_chroot(output, DESTINATION_MOUNT_PATH, cmd);
 934         }
 935
 936         return r;
 937 }
 938
 939 static char* hw_get_uuid(const char* dev) {
 940         blkid_probe p = blkid_new_probe_from_filename(dev);
 941         const char* buffer = NULL;
 942         char* uuid = NULL;
 943
 944         if (!p)
 945                 return NULL;
 946
 947         blkid_do_probe(p);
 948         blkid_probe_lookup_value(p, "UUID", &buffer, NULL);
 949
 950         if (buffer)
 951                 uuid = strdup(buffer);
 952
 953         blkid_free_probe(p);
 954
 955         return uuid;
 956 }
 957
 958 int hw_write_fstab(struct hw_destination* dest) {
 959         FILE* f = fopen(DESTINATION_MOUNT_PATH "/etc/fstab", "w");
 960         if (!f)
 961                 return -1;
 962
 963         const char* fmt = "UUID=%s %-8s %-4s %-10s %d %d\n";
 964         char* uuid = NULL;
 965
 966         // boot
 967         if (*dest->part_boot) {
 968                 uuid = hw_get_uuid(dest->part_boot);
 969
 970                 if (uuid) {
 971                         fprintf(f, fmt, uuid, "/boot", "auto", "defaults", 1, 2);
 972                         free(uuid);
 973                 }
 974         }
 975
 976         // swap
 977         if (*dest->part_swap) {
 978                 uuid = hw_get_uuid(dest->part_swap);
 979
 980                 if (uuid) {
 981                         fprintf(f, fmt, uuid, "swap", "swap", "defaults,pri=1", 0, 0);
 982                         free(uuid);
 983                 }
 984         }
 985
 986         // root
 987         uuid = hw_get_uuid(dest->part_root);
 988         if (uuid) {
 989                 fprintf(f, fmt, uuid, "/", "auto", "defaults", 1, 1);
 990                 free(uuid);
 991         }
 992
 993         // data
 994         if (*dest->part_data) {
 995                 uuid = hw_get_uuid(dest->part_data);
 996
 997                 if (uuid) {
 998                         fprintf(f, fmt, uuid, "/var", "auto", "defaults", 1, 1);
 999                         free(uuid);
1000                 }
1001         }
1002
1003         fclose(f);
1004
1005         return 0;
1006 }
1007
1008 void hw_sync() {
1009         sync();
1010         sync();
1011         sync();
1012 }