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