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 <errno.h>
  28 #include <fcntl.h>
  29 #include <libudev.h>
  30 #include <linux/loop.h>
  31 #include <math.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <sys/ioctl.h>
  36 #include <sys/mount.h>
  37 #include <sys/stat.h>
  38 #include <sys/swap.h>
  39 #include <sys/sysinfo.h>
  40 #include <sys/utsname.h>
  41 #include <unistd.h>
  42
  43 #include <linux/fs.h>
  44
  45 #include <libsmooth.h>
  46
  47 #include "hw.h"
  48
  49 const char* other_filesystems[] = {
  50         "/dev",
  51         "/proc",
  52         "/sys",
  53         NULL
  54 };
  55
  56 static int system_chroot(const char* output, const char* path, const char* cmd) {
  57         char chroot_cmd[STRING_SIZE];
  58
  59         snprintf(chroot_cmd, sizeof(chroot_cmd), "/usr/sbin/chroot %s %s", path, cmd);
  60
  61         return mysystem(output, chroot_cmd);
  62 }
  63
  64 struct hw* hw_init() {
  65         struct hw* hw = calloc(1, sizeof(*hw));
  66         assert(hw);
  67
  68         // Initialize libudev
  69         hw->udev = udev_new();
  70         if (!hw->udev) {
  71                 fprintf(stderr, "Could not create udev instance\n");
  72                 exit(1);
  73         }
  74
  75         // What architecture are we running on?
  76         struct utsname uname_data;
  77         int ret = uname(&uname_data);
  78         if (ret == 0)
  79                 snprintf(hw->arch, sizeof(hw->arch), "%s", uname_data.machine);
  80
  81         // Should we install in EFI mode?
  82         if ((strcmp(hw->arch, "x86_64") == 0) || (strcmp(hw->arch, "aarch64") == 0))
  83                 hw->efi = 1;
  84
  85         return hw;
  86 }
  87
  88 void hw_free(struct hw* hw) {
  89         if (hw->udev)
  90                 udev_unref(hw->udev);
  91
  92         free(hw);
  93 }
  94
  95 static int strstartswith(const char* a, const char* b) {
  96         return (strncmp(a, b, strlen(b)) == 0);
  97 }
  98
  99 static char loop_device[STRING_SIZE];
 100
 101 static int setup_loop_device(const char* source, const char* device) {
 102         int file_fd = open(source, O_RDWR);
 103         if (file_fd < 0)
 104                 goto ERROR;
 105
 106         int device_fd = -1;
 107         if ((device_fd = open(device, O_RDWR)) < 0)
 108                 goto ERROR;
 109
 110         if (ioctl(device_fd, LOOP_SET_FD, file_fd) < 0)
 111                 goto ERROR;
 112
 113         close(file_fd);
 114         close(device_fd);
 115
 116         return 0;
 117
 118 ERROR:
 119         if (file_fd >= 0)
 120                 close(file_fd);
 121
 122         if (device_fd >= 0) {
 123                 ioctl(device_fd, LOOP_CLR_FD, 0);
 124                 close(device_fd);
 125         }
 126
 127         return -1;
 128 }
 129
 130 int hw_mount(const char* source, const char* target, const char* fs, int flags) {
 131         const char* loop_device = "/dev/loop0";
 132
 133         // Create target if it does not exist
 134         if (access(target, X_OK) != 0)
 135                 mkdir(target, S_IRWXU|S_IRWXG|S_IRWXO);
 136
 137         struct stat st;
 138         stat(source, &st);
 139
 140         if (S_ISREG(st.st_mode)) {
 141                 int r = setup_loop_device(source, loop_device);
 142                 if (r == 0) {
 143                         source = loop_device;
 144                 } else {
 145                         return -1;
 146                 }
 147         }
 148
 149         return mount(source, target, fs, flags, NULL);
 150 }
 151
 152 int hw_umount(const char* target) {
 153         int r = umount2(target, 0);
 154
 155         if (r && errno == EBUSY) {
 156                 // Give it a moment to settle
 157                 sleep(1);
 158
 159                 r = umount2(target, MNT_FORCE);
 160         }
 161
 162         return r;
 163 }
 164
 165 static int hw_test_source_medium(const char* path) {
 166         int ret = hw_mount(path, SOURCE_MOUNT_PATH, "iso9660", MS_RDONLY);
 167
 168         // If the source could not be mounted we
 169         // cannot proceed.
 170         if (ret != 0)
 171                 return ret;
 172
 173         // Check if the test file exists.
 174         ret = access(SOURCE_TEST_FILE, R_OK);
 175
 176         // Umount the test device.
 177         hw_umount(SOURCE_MOUNT_PATH);
 178
 179         return ret;
 180 }
 181
 182 char* hw_find_source_medium(struct hw* hw) {
 183         char* ret = NULL;
 184
 185         struct udev_enumerate* enumerate = udev_enumerate_new(hw->udev);
 186
 187         udev_enumerate_add_match_subsystem(enumerate, "block");
 188         udev_enumerate_scan_devices(enumerate);
 189
 190         struct udev_list_entry* devices = udev_enumerate_get_list_entry(enumerate);
 191
 192         struct udev_list_entry* dev_list_entry;
 193         udev_list_entry_foreach(dev_list_entry, devices) {
 194                 const char* path = udev_list_entry_get_name(dev_list_entry);
 195                 struct udev_device* dev = udev_device_new_from_syspath(hw->udev, path);
 196
 197                 const char* dev_path = udev_device_get_devnode(dev);
 198
 199                 // Skip everything what we cannot work with
 200                 if (strstartswith(dev_path, "/dev/loop") || strstartswith(dev_path, "/dev/fd") ||
 201                                 strstartswith(dev_path, "/dev/ram") || strstartswith(dev_path, "/dev/md"))
 202                         continue;
 203
 204                 if (hw_test_source_medium(dev_path) == 0) {
 205                         ret = strdup(dev_path);
 206                 }
 207
 208                 udev_device_unref(dev);
 209
 210                 // If a suitable device was found the search will end.
 211                 if (ret)
 212                         break;
 213         }
 214
 215         udev_enumerate_unref(enumerate);
 216
 217         return ret;
 218 }
 219
 220 static struct hw_disk** hw_create_disks() {
 221         struct hw_disk** ret = malloc(sizeof(*ret) * (HW_MAX_DISKS + 1));
 222
 223         return ret;
 224 }
 225
 226 static unsigned long long hw_block_device_get_size(const char* dev) {
 227         int fd = open(dev, O_RDONLY);
 228         if (fd < 0)
 229                 return 0;
 230
 231         unsigned long long size = blkid_get_dev_size(fd);
 232         close(fd);
 233
 234         return size;
 235 }
 236
 237 struct hw_disk** hw_find_disks(struct hw* hw, const char* sourcedrive) {
 238         struct hw_disk** ret = hw_create_disks();
 239         struct hw_disk** disks = ret;
 240
 241         struct udev_enumerate* enumerate = udev_enumerate_new(hw->udev);
 242
 243         udev_enumerate_add_match_subsystem(enumerate, "block");
 244         udev_enumerate_scan_devices(enumerate);
 245
 246         struct udev_list_entry* devices = udev_enumerate_get_list_entry(enumerate);
 247
 248         struct udev_list_entry* dev_list_entry;
 249         unsigned int i = HW_MAX_DISKS;
 250         udev_list_entry_foreach(dev_list_entry, devices) {
 251                 const char* path = udev_list_entry_get_name(dev_list_entry);
 252                 struct udev_device* dev = udev_device_new_from_syspath(hw->udev, path);
 253
 254                 const char* dev_path = udev_device_get_devnode(dev);
 255
 256                 // Skip everything what we cannot work with
 257                 if (strstartswith(dev_path, "/dev/loop") || strstartswith(dev_path, "/dev/fd") ||
 258                                 strstartswith(dev_path, "/dev/ram") || strstartswith(dev_path, "/dev/sr") ||
 259                                 strstartswith(dev_path, "/dev/md")) {
 260                         udev_device_unref(dev);
 261                         continue;
 262                 }
 263
 264                 // Skip sourcedrive if we need to
 265                 if (sourcedrive && (strcmp(dev_path, sourcedrive) == 0)) {
 266                         udev_device_unref(dev);
 267                         continue;
 268                 }
 269
 270                 // DEVTYPE must be disk (otherwise we will see all sorts of partitions here)
 271                 const char* devtype = udev_device_get_property_value(dev, "DEVTYPE");
 272                 if (devtype && (strcmp(devtype, "disk") != 0)) {
 273                         udev_device_unref(dev);
 274                         continue;
 275                 }
 276
 277                 // Skip devices with a size of zero
 278                 unsigned long long size = hw_block_device_get_size(dev_path);
 279                 if (size == 0) {
 280                         udev_device_unref(dev);
 281                         continue;
 282                 }
 283
 284                 struct hw_disk* disk = malloc(sizeof(*disk));
 285                 if (disk == NULL)
 286                         return NULL;
 287
 288                 disk->ref = 1;
 289
 290                 strncpy(disk->path, dev_path, sizeof(disk->path));
 291                 const char* p = disk->path + 5;
 292
 293                 disk->size = size;
 294
 295                 // Vendor
 296                 const char* vendor = udev_device_get_property_value(dev, "ID_VENDOR");
 297                 if (!vendor)
 298                         vendor = udev_device_get_sysattr_value(dev, "vendor");
 299                 if (!vendor)
 300                         vendor = udev_device_get_sysattr_value(dev, "manufacturer");
 301
 302                 if (vendor)
 303                         strncpy(disk->vendor, vendor, sizeof(disk->vendor));
 304                 else
 305                         *disk->vendor = '\0';
 306
 307                 // Model
 308                 const char* model = udev_device_get_property_value(dev, "ID_MODEL");
 309                 if (!model)
 310                         model = udev_device_get_sysattr_value(dev, "model");
 311                 if (!model)
 312                         model = udev_device_get_sysattr_value(dev, "product");
 313
 314                 if (model)
 315                         strncpy(disk->model, model, sizeof(disk->model));
 316                 else
 317                         *disk->model = '\0';
 318
 319                 // Format description
 320                 char size_str[STRING_SIZE];
 321                 snprintf(size_str, sizeof(size_str), "%4.1fGB", (double)disk->size / pow(1024, 3));
 322
 323                 if (*disk->vendor && *disk->model) {
 324                         snprintf(disk->description, sizeof(disk->description),
 325                                 "%s - %s - %s - %s", size_str, p, disk->vendor, disk->model);
 326
 327                 } else if (*disk->vendor || *disk->model) {
 328                         snprintf(disk->description, sizeof(disk->description),
 329                                 "%s - %s - %s", size_str, p, (*disk->vendor) ? disk->vendor : disk->model);
 330
 331                 } else {
 332                         snprintf(disk->description, sizeof(disk->description),
 333                                 "%s - %s", size_str, p);
 334                 }
 335
 336                 // Cut off the description string after 40 characters
 337                 disk->description[41] = '\0';
 338
 339                 *disks++ = disk;
 340
 341                 if (--i == 0)
 342                         break;
 343
 344                 udev_device_unref(dev);
 345         }
 346
 347         udev_enumerate_unref(enumerate);
 348
 349         *disks = NULL;
 350
 351         return ret;
 352 }
 353
 354 void hw_free_disks(struct hw_disk** disks) {
 355         struct hw_disk** disk = disks;
 356
 357         while (*disk != NULL) {
 358                 if (--(*disk)->ref == 0)
 359                         free(*disk);
 360
 361                 disk++;
 362         }
 363
 364         free(disks);
 365 }
 366
 367 unsigned int hw_count_disks(const struct hw_disk** disks) {
 368         unsigned int ret = 0;
 369
 370         while (*disks++)
 371                 ret++;
 372
 373         return ret;
 374 }
 375
 376 struct hw_disk** hw_select_disks(struct hw_disk** disks, int* selection) {
 377         struct hw_disk** ret = hw_create_disks();
 378         struct hw_disk** selected_disks = ret;
 379
 380         unsigned int num_disks = hw_count_disks((const struct hw_disk**)disks);
 381
 382         for (unsigned int i = 0; i < num_disks; i++) {
 383                 if (!selection || selection[i]) {
 384                         struct hw_disk *selected_disk = disks[i];
 385                         selected_disk->ref++;
 386
 387                         *selected_disks++ = selected_disk;
 388                 }
 389         }
 390
 391         // Set sentinel
 392         *selected_disks = NULL;
 393
 394         return ret;
 395 }
 396
 397 struct hw_disk** hw_select_first_disk(const struct hw_disk** disks) {
 398         struct hw_disk** ret = hw_create_disks();
 399         struct hw_disk** selected_disks = ret;
 400
 401         unsigned int num_disks = hw_count_disks(disks);
 402         assert(num_disks > 0);
 403
 404         for (unsigned int i = 0; i < num_disks; i++) {
 405                 struct hw_disk *disk = disks[i];
 406                 disk->ref++;
 407
 408                 *selected_disks++ = disk;
 409                 break;
 410         }
 411
 412         // Set sentinel
 413         *selected_disks = NULL;
 414
 415         return ret;
 416 }
 417
 418 static unsigned long long hw_swap_size(struct hw_destination* dest) {
 419         unsigned long long memory = hw_memory();
 420
 421         unsigned long long swap_size = memory / 4;
 422
 423         // Min. swap size is 128MB
 424         if (swap_size < MB2BYTES(128))
 425                 swap_size = MB2BYTES(128);
 426
 427         // Cap swap size to 1GB
 428         else if (swap_size > MB2BYTES(1024))
 429                 swap_size = MB2BYTES(1024);
 430
 431         return swap_size;
 432 }
 433
 434 static unsigned long long hw_boot_size(struct hw_destination* dest) {
 435         return MB2BYTES(128);
 436 }
 437
 438 static int hw_device_has_p_suffix(const struct hw_destination* dest) {
 439         // All RAID devices have the p suffix.
 440         if (dest->is_raid)
 441                 return 1;
 442
 443         // Devices with a number at the end have the p suffix, too.
 444         // e.g. mmcblk0, cciss0
 445         unsigned int last_char = strlen(dest->path) - 1;
 446         if ((dest->path[last_char] >= '0') && (dest->path[last_char] <= '9'))
 447                 return 1;
 448
 449         return 0;
 450 }
 451
 452 static int hw_calculate_partition_table(struct hw* hw, struct hw_destination* dest, int disable_swap) {
 453         char path[DEV_SIZE];
 454         int part_idx = 1;
 455
 456         snprintf(path, sizeof(path), "%s%s", dest->path,
 457                 hw_device_has_p_suffix(dest) ? "p" : "");
 458         dest->part_boot_idx = 0;
 459
 460         // Determine the size of the target block device
 461         if (dest->is_raid) {
 462                 dest->size = (dest->disk1->size >= dest->disk2->size) ?
 463                         dest->disk2->size : dest->disk1->size;
 464
 465                 // The RAID will install some metadata at the end of the disk
 466                 // and we will save up some space for that.
 467                 dest->size -= MB2BYTES(2);
 468         } else {
 469                 dest->size = dest->disk1->size;
 470         }
 471
 472         // As we add some extra space before the beginning of the first
 473         // partition, we need to substract that here.
 474         dest->size -= MB2BYTES(1);
 475
 476         // Add some more space for partition tables, etc.
 477         dest->size -= MB2BYTES(1);
 478
 479         // The disk has to have at least 2GB
 480         if (dest->size <= MB2BYTES(2048))
 481                 return -1;
 482
 483         // Determine partition table
 484         dest->part_table = HW_PART_TABLE_MSDOS;
 485
 486         // Disks over 2TB need to use GPT
 487         if (dest->size >= MB2BYTES(2047 * 1024))
 488                 dest->part_table = HW_PART_TABLE_GPT;
 489
 490         // We also use GPT on raid disks by default
 491         else if (dest->is_raid)
 492                 dest->part_table = HW_PART_TABLE_GPT;
 493
 494         // When using GPT, GRUB2 needs a little bit of space to put
 495         // itself in.
 496         if (dest->part_table == HW_PART_TABLE_GPT) {
 497                 snprintf(dest->part_bootldr, sizeof(dest->part_bootldr),
 498                         "%s%d", path, part_idx);
 499
 500                 dest->size_bootldr = MB2BYTES(4);
 501
 502                 dest->part_boot_idx = part_idx++;
 503         } else {
 504                 *dest->part_bootldr = '\0';
 505                 dest->size_bootldr = 0;
 506         }
 507
 508         dest->size_boot = hw_boot_size(dest);
 509
 510         // Create an EFI partition when running in EFI mode
 511         if (hw->efi)
 512                 dest->size_boot_efi = MB2BYTES(32);
 513         else
 514                 dest->size_boot_efi = 0;
 515
 516         // Determine the size of the data partition.
 517         unsigned long long space_left = dest->size - \
 518                 (dest->size_bootldr + dest->size_boot + dest->size_boot_efi);
 519
 520         // If we have less than 2GB left, we disable swap
 521         if (space_left <= MB2BYTES(2048))
 522                 disable_swap = 1;
 523
 524         // Should we use swap?
 525         if (disable_swap)
 526                 dest->size_swap = 0;
 527         else
 528                 dest->size_swap = hw_swap_size(dest);
 529
 530         // Subtract swap
 531         space_left -= dest->size_swap;
 532
 533         // Root is getting what ever is left
 534         dest->size_root = space_left;
 535
 536         // Set partition names
 537         if (dest->size_boot > 0) {
 538                 if (dest->part_boot_idx == 0)
 539                         dest->part_boot_idx = part_idx;
 540
 541                 snprintf(dest->part_boot, sizeof(dest->part_boot), "%s%d", path, part_idx++);
 542         } else
 543                 *dest->part_boot = '\0';
 544
 545         if (dest->size_boot_efi > 0) {
 546                 dest->part_boot_efi_idx = part_idx;
 547
 548                 snprintf(dest->part_boot_efi, sizeof(dest->part_boot_efi),
 549                         "%s%d", path, part_idx++);
 550         } else {
 551                 *dest->part_boot_efi = '\0';
 552                 dest->part_boot_efi_idx = 0;
 553         }
 554
 555         if (dest->size_swap > 0)
 556                 snprintf(dest->part_swap, sizeof(dest->part_swap), "%s%d", path, part_idx++);
 557         else
 558                 *dest->part_swap = '\0';
 559
 560         // There is always a root partition
 561         if (dest->part_boot_idx == 0)
 562                 dest->part_boot_idx = part_idx;
 563
 564         snprintf(dest->part_root, sizeof(dest->part_root), "%s%d", path, part_idx++);
 565
 566         return 0;
 567 }
 568
 569 struct hw_destination* hw_make_destination(struct hw* hw, int part_type, struct hw_disk** disks, int disable_swap) {
 570         struct hw_destination* dest = malloc(sizeof(*dest));
 571
 572         if (part_type == HW_PART_TYPE_NORMAL) {
 573                 dest->disk1 = *disks;
 574                 dest->disk2 = NULL;
 575
 576                 strncpy(dest->path, dest->disk1->path, sizeof(dest->path));
 577
 578         } else if (part_type == HW_PART_TYPE_RAID1) {
 579                 dest->disk1 = *disks++;
 580                 dest->disk2 = *disks;
 581                 dest->raid_level = 1;
 582
 583                 snprintf(dest->path, sizeof(dest->path), "/dev/md0");
 584         }
 585
 586         // Is this a RAID device?
 587         dest->is_raid = (part_type > HW_PART_TYPE_NORMAL);
 588
 589         int r = hw_calculate_partition_table(hw, dest, disable_swap);
 590         if (r)
 591                 return NULL;
 592
 593         // Set default filesystem
 594         dest->filesystem = HW_FS_DEFAULT;
 595
 596         return dest;
 597 }
 598
 599 unsigned long long hw_memory() {
 600         struct sysinfo si;
 601
 602         int r = sysinfo(&si);
 603         if (r < 0)
 604                 return 0;
 605
 606         return si.totalram;
 607 }
 608
 609 static int hw_zero_out_device(const char* path, int bytes) {
 610         char block[512];
 611         memset(block, 0, sizeof(block));
 612
 613         int blocks = bytes / sizeof(block);
 614
 615         int fd = open(path, O_WRONLY);
 616         if (fd < 0)
 617                 return -1;
 618
 619         unsigned int bytes_written = 0;
 620         while (blocks-- > 0) {
 621                 bytes_written += write(fd, block, sizeof(block));
 622         }
 623
 624         fsync(fd);
 625         close(fd);
 626
 627         return bytes_written;
 628 }
 629
 630 static int try_open(const char* path) {
 631         FILE* f = fopen(path, "r");
 632         if (f) {
 633                 fclose(f);
 634                 return 0;
 635         }
 636
 637         return -1;
 638 }
 639
 640 int hw_create_partitions(struct hw_destination* dest, const char* output) {
 641         // Before we write a new partition table to the disk, we will erase
 642         // the first couple of megabytes at the beginning of the device to
 643         // get rid of all left other things like bootloaders and partition tables.
 644         // This solves some problems when changing from MBR to GPT partitions or
 645         // the other way around.
 646         int r = hw_zero_out_device(dest->path, MB2BYTES(10));
 647         if (r <= 0)
 648                 return r;
 649
 650         char* cmd = NULL;
 651         asprintf(&cmd, "/usr/sbin/parted -s %s -a optimal", dest->path);
 652
 653         // Set partition type
 654         if (dest->part_table == HW_PART_TABLE_MSDOS)
 655                 asprintf(&cmd, "%s mklabel msdos", cmd);
 656         else if (dest->part_table == HW_PART_TABLE_GPT)
 657                 asprintf(&cmd, "%s mklabel gpt", cmd);
 658
 659         unsigned long long part_start = MB2BYTES(1);
 660
 661         if (*dest->part_bootldr) {
 662                 asprintf(&cmd, "%s mkpart %s ext2 %lluB %lluB", cmd,
 663                         (dest->part_table == HW_PART_TABLE_GPT) ? "BOOTLDR" : "primary",
 664                 part_start, part_start + dest->size_bootldr - 1);
 665
 666                 part_start += dest->size_bootldr;
 667         }
 668
 669         if (*dest->part_boot) {
 670                 asprintf(&cmd, "%s mkpart %s ext2 %lluB %lluB", cmd,
 671                         (dest->part_table == HW_PART_TABLE_GPT) ? "BOOT" : "primary",
 672                         part_start, part_start + dest->size_boot - 1);
 673
 674                 part_start += dest->size_boot;
 675         }
 676
 677         if (*dest->part_boot_efi) {
 678                 asprintf(&cmd, "%s mkpart %s fat32 %lluB %lluB", cmd,
 679                         (dest->part_table == HW_PART_TABLE_GPT) ? "ESP" : "primary",
 680                         part_start, part_start + dest->size_boot_efi - 1);
 681
 682                 part_start += dest->size_boot_efi;
 683         }
 684
 685         if (*dest->part_swap) {
 686                 asprintf(&cmd, "%s mkpart %s linux-swap %lluB %lluB", cmd,
 687                         (dest->part_table == HW_PART_TABLE_GPT) ? "SWAP" : "primary",
 688                         part_start, part_start + dest->size_swap - 1);
 689
 690                 part_start += dest->size_swap;
 691         }
 692
 693         if (*dest->part_root) {
 694                 asprintf(&cmd, "%s mkpart %s ext2 %lluB %lluB", cmd,
 695                         (dest->part_table == HW_PART_TABLE_GPT) ? "ROOT" : "primary",
 696                         part_start, part_start + dest->size_root - 1);
 697
 698                 part_start += dest->size_root;
 699         }
 700
 701         if (dest->part_boot_idx > 0)
 702                 asprintf(&cmd, "%s set %d boot on", cmd, dest->part_boot_idx);
 703
 704         if (dest->part_boot_efi_idx > 0)
 705                 asprintf(&cmd, "%s set %d esp on", cmd, dest->part_boot_efi_idx);
 706
 707         if (dest->part_table == HW_PART_TABLE_GPT) {
 708                 if (*dest->part_bootldr) {
 709                         asprintf(&cmd, "%s set %d bios_grub on", cmd, dest->part_boot_idx);
 710                 }
 711         }
 712
 713         r = mysystem(output, cmd);
 714
 715         // Wait until the system re-read the partition table
 716         if (r == 0) {
 717                 unsigned int counter = 10;
 718
 719                 while (counter-- > 0) {
 720                         sleep(1);
 721
 722                         if (*dest->part_bootldr && (try_open(dest->part_bootldr) != 0))
 723                                 continue;
 724
 725                         if (*dest->part_boot && (try_open(dest->part_boot) != 0))
 726                                 continue;
 727
 728                         if (*dest->part_boot_efi && (try_open(dest->part_boot_efi) != 0))
 729                                 continue;
 730
 731                         if (*dest->part_swap && (try_open(dest->part_swap) != 0))
 732                                 continue;
 733
 734                         if (*dest->part_root && (try_open(dest->part_root) != 0))
 735                                 continue;
 736
 737                         // All partitions do exist, exiting the loop.
 738                         break;
 739                 }
 740         }
 741
 742         if (cmd)
 743                 free(cmd);
 744
 745         return r;
 746 }
 747
 748 static int hw_format_filesystem(const char* path, int fs, const char* output) {
 749         char cmd[STRING_SIZE] = "\0";
 750
 751         // Swap
 752         if (fs == HW_FS_SWAP) {
 753                 snprintf(cmd, sizeof(cmd), "/sbin/mkswap -v1 %s &>/dev/null", path);
 754         // ReiserFS
 755         } else if (fs == HW_FS_REISERFS) {
 756                 snprintf(cmd, sizeof(cmd), "/sbin/mkreiserfs -f %s ", path);
 757
 758         // EXT4
 759         } else if (fs == HW_FS_EXT4) {
 760                 snprintf(cmd, sizeof(cmd), "/sbin/mke2fs -FF -T ext4 %s", path);
 761
 762         // EXT4 w/o journal
 763         } else if (fs == HW_FS_EXT4_WO_JOURNAL) {
 764                 snprintf(cmd, sizeof(cmd), "/sbin/mke2fs -FF -T ext4 -O ^has_journal %s", path);
 765
 766         // XFS
 767         } else if (fs == HW_FS_XFS) {
 768                 snprintf(cmd, sizeof(cmd), "/sbin/mkfs.xfs -f %s", path);
 769
 770         // FAT32
 771         } else if (fs == HW_FS_FAT32) {
 772                 snprintf(cmd, sizeof(cmd), "/sbin/mkfs.vfat %s", path);
 773         }
 774
 775         assert(*cmd);
 776
 777         int r = mysystem(output, cmd);
 778
 779         return r;
 780 }
 781
 782 int hw_create_filesystems(struct hw_destination* dest, const char* output) {
 783         int r;
 784
 785         // boot
 786         if (*dest->part_boot) {
 787                 r = hw_format_filesystem(dest->part_boot, dest->filesystem, output);
 788                 if (r)
 789                         return r;
 790         }
 791
 792         // ESP
 793         if (*dest->part_boot_efi) {
 794                 r = hw_format_filesystem(dest->part_boot_efi, HW_FS_FAT32, output);
 795                 if (r)
 796                         return r;
 797         }
 798
 799         // swap
 800         if (*dest->part_swap) {
 801                 r = hw_format_filesystem(dest->part_swap, HW_FS_SWAP, output);
 802                 if (r)
 803                         return r;
 804         }
 805
 806         // root
 807         r = hw_format_filesystem(dest->part_root, dest->filesystem, output);
 808         if (r)
 809                 return r;
 810
 811         return 0;
 812 }
 813
 814 int hw_mount_filesystems(struct hw_destination* dest, const char* prefix) {
 815         char target[STRING_SIZE];
 816
 817         assert(*prefix == '/');
 818
 819         const char* filesystem;
 820         switch (dest->filesystem) {
 821                 case HW_FS_REISERFS:
 822                         filesystem = "reiserfs";
 823                         break;
 824
 825                 case HW_FS_EXT4:
 826                 case HW_FS_EXT4_WO_JOURNAL:
 827                         filesystem = "ext4";
 828                         break;
 829
 830                 case HW_FS_XFS:
 831                         filesystem = "xfs";
 832                         break;
 833
 834                 case HW_FS_FAT32:
 835                         filesystem = "vfat";
 836                         break;
 837
 838                 default:
 839                         assert(0);
 840         }
 841
 842         // root
 843         int r = hw_mount(dest->part_root, prefix, filesystem, 0);
 844         if (r)
 845                 return r;
 846
 847         // boot
 848         if (*dest->part_boot) {
 849                 snprintf(target, sizeof(target), "%s%s", prefix, HW_PATH_BOOT);
 850                 mkdir(target, S_IRWXU|S_IRWXG|S_IRWXO);
 851
 852                 r = hw_mount(dest->part_boot, target, filesystem, 0);
 853                 if (r) {
 854                         hw_umount_filesystems(dest, prefix);
 855
 856                         return r;
 857                 }
 858         }
 859
 860         // ESP
 861         if (*dest->part_boot_efi) {
 862                 snprintf(target, sizeof(target), "%s%s", prefix, HW_PATH_BOOT_EFI);
 863                 mkdir(target, S_IRWXU|S_IRWXG|S_IRWXO);
 864
 865                 r = hw_mount(dest->part_boot_efi, target, "vfat", 0);
 866                 if (r) {
 867                         hw_umount_filesystems(dest, prefix);
 868
 869                         return r;
 870                 }
 871         }
 872
 873         // swap
 874         if (*dest->part_swap) {
 875                 r = swapon(dest->part_swap, 0);
 876                 if (r) {
 877                         hw_umount_filesystems(dest, prefix);
 878
 879                         return r;
 880                 }
 881         }
 882
 883         // bind-mount misc filesystems
 884         char** otherfs = other_filesystems;
 885         while (*otherfs) {
 886                 snprintf(target, sizeof(target), "%s%s", prefix, *otherfs);
 887
 888                 mkdir(target, S_IRWXU|S_IRWXG|S_IRWXO);
 889                 r = hw_mount(*otherfs, target, NULL, MS_BIND);
 890                 if (r) {
 891                         hw_umount_filesystems(dest, prefix);
 892
 893                         return r;
 894                 }
 895
 896                 otherfs++;
 897         }
 898
 899         return 0;
 900 }
 901
 902 int hw_umount_filesystems(struct hw_destination* dest, const char* prefix) {
 903         int r;
 904         char target[STRING_SIZE];
 905
 906         // Write all buffers to disk before umounting
 907         hw_sync();
 908
 909         // ESP
 910         if (*dest->part_boot_efi) {
 911                 snprintf(target, sizeof(target), "%s%s", prefix, HW_PATH_BOOT_EFI);
 912                 r = hw_umount(target);
 913                 if (r)
 914                         return -1;
 915         }
 916
 917         // boot
 918         if (*dest->part_boot) {
 919                 snprintf(target, sizeof(target), "%s%s", prefix, HW_PATH_BOOT);
 920                 r = hw_umount(target);
 921                 if (r)
 922                         return -1;
 923         }
 924
 925         // swap
 926         if (*dest->part_swap) {
 927                 swapoff(dest->part_swap);
 928         }
 929
 930         // misc filesystems
 931         char** otherfs = other_filesystems;
 932         while (*otherfs) {
 933                 snprintf(target, sizeof(target), "%s%s", prefix, *otherfs++);
 934                 r = hw_umount(target);
 935                 if (r)
 936                         return -1;
 937         }
 938
 939         // root
 940         r = hw_umount(prefix);
 941         if (r)
 942                 return -1;
 943
 944         return 0;
 945 }
 946
 947 int hw_destroy_raid_superblocks(const struct hw_destination* dest, const char* output) {
 948         char cmd[STRING_SIZE];
 949
 950         hw_stop_all_raid_arrays(output);
 951         hw_stop_all_raid_arrays(output);
 952
 953         if (dest->disk1) {
 954                 snprintf(cmd, sizeof(cmd), "/sbin/mdadm --zero-superblock %s", dest->disk1->path);
 955                 mysystem(output, cmd);
 956         }
 957
 958         if (dest->disk2) {
 959                 snprintf(cmd, sizeof(cmd), "/sbin/mdadm --zero-superblock %s", dest->disk2->path);
 960                 mysystem(output, cmd);
 961         }
 962
 963         return 0;
 964 }
 965
 966 int hw_setup_raid(struct hw_destination* dest, const char* output) {
 967         char* cmd = NULL;
 968         int r;
 969
 970         assert(dest->is_raid);
 971
 972         // Stop all RAID arrays that might be around (again).
 973         // It seems that there is some sort of race-condition with udev re-enabling
 974         // the raid arrays and therefore locking the disks.
 975         r = hw_destroy_raid_superblocks(dest, output);
 976
 977         asprintf(&cmd, "echo \"y\" | /sbin/mdadm --create --verbose --metadata=%s --auto=mdp %s",
 978                 RAID_METADATA, dest->path);
 979
 980         switch (dest->raid_level) {
 981                 case 1:
 982                         asprintf(&cmd, "%s --level=1 --raid-devices=2", cmd);
 983                         break;
 984
 985                 default:
 986                         assert(0);
 987         }
 988
 989         if (dest->disk1) {
 990                 asprintf(&cmd, "%s %s", cmd, dest->disk1->path);
 991
 992                 // Clear all data at the beginning
 993                 r = hw_zero_out_device(dest->disk1->path, MB2BYTES(10));
 994                 if (r <= 0)
 995                         return r;
 996         }
 997
 998         if (dest->disk2) {
 999                 asprintf(&cmd, "%s %s", cmd, dest->disk2->path);
1000
1001                 // Clear all data at the beginning
1002                 r = hw_zero_out_device(dest->disk2->path, MB2BYTES(10));
1003                 if (r <= 0)
1004                         return r;
1005         }
1006
1007         r = mysystem(output, cmd);
1008         free(cmd);
1009
1010         // Wait a moment until the device has been properly brought up
1011         if (r == 0) {
1012                 unsigned int counter = 10;
1013                 while (counter-- > 0) {
1014                         sleep(1);
1015
1016                         // If the raid device has not yet been properly brought up,
1017                         // opening it will fail with the message: Device or resource busy
1018                         // Hence we will wait a bit until it becomes usable.
1019                         if (try_open(dest->path) == 0)
1020                                 break;
1021                 }
1022         }
1023
1024         return r;
1025 }
1026
1027 int hw_stop_all_raid_arrays(const char* output) {
1028         return mysystem(output, "/sbin/mdadm --stop --scan --verbose");
1029 }
1030
1031 int hw_install_bootloader(struct hw* hw, struct hw_destination* dest, const char* output) {
1032         char cmd[STRING_SIZE];
1033
1034         snprintf(cmd, sizeof(cmd), "/usr/bin/install-bootloader %s", dest->path);
1035         int r = system_chroot(output, DESTINATION_MOUNT_PATH, cmd);
1036         if (r)
1037                 return r;
1038
1039         hw_sync();
1040
1041         return 0;
1042 }
1043
1044 static char* hw_get_uuid(const char* dev) {
1045         blkid_probe p = blkid_new_probe_from_filename(dev);
1046         const char* buffer = NULL;
1047         char* uuid = NULL;
1048
1049         if (!p)
1050                 return NULL;
1051
1052         blkid_do_probe(p);
1053         blkid_probe_lookup_value(p, "UUID", &buffer, NULL);
1054
1055         if (buffer)
1056                 uuid = strdup(buffer);
1057
1058         blkid_free_probe(p);
1059
1060         return uuid;
1061 }
1062
1063 #define FSTAB_FMT "UUID=%s %-8s %-4s %-10s %d %d\n"
1064
1065 int hw_write_fstab(struct hw_destination* dest) {
1066         FILE* f = fopen(DESTINATION_MOUNT_PATH "/etc/fstab", "w");
1067         if (!f)
1068                 return -1;
1069
1070         char* uuid = NULL;
1071
1072         // boot
1073         if (*dest->part_boot) {
1074                 uuid = hw_get_uuid(dest->part_boot);
1075
1076                 if (uuid) {
1077                         fprintf(f, FSTAB_FMT, uuid, "/boot", "auto", "defaults", 1, 2);
1078                         free(uuid);
1079                 }
1080         }
1081
1082         // ESP
1083         if (*dest->part_boot_efi) {
1084                 uuid = hw_get_uuid(dest->part_boot_efi);
1085
1086                 if (uuid) {
1087                         fprintf(f, FSTAB_FMT, uuid, "/boot/efi", "auto", "defaults", 1, 2);
1088                         free(uuid);
1089                 }
1090         }
1091
1092
1093         // swap
1094         if (*dest->part_swap) {
1095                 uuid = hw_get_uuid(dest->part_swap);
1096
1097                 if (uuid) {
1098                         fprintf(f, FSTAB_FMT, uuid, "swap", "swap", "defaults,pri=1", 0, 0);
1099                         free(uuid);
1100                 }
1101         }
1102
1103         // root
1104         uuid = hw_get_uuid(dest->part_root);
1105         if (uuid) {
1106                 fprintf(f, FSTAB_FMT, uuid, "/", "auto", "defaults", 1, 1);
1107                 free(uuid);
1108         }
1109
1110         fclose(f);
1111
1112         return 0;
1113 }
1114
1115 void hw_sync() {
1116         sync();
1117         sync();
1118         sync();
1119 }
1120
1121 int hw_start_networking(const char* output) {
1122         return mysystem(output, "/usr/bin/start-networking.sh");
1123 }
1124
1125 char* hw_find_backup_file(const char* output, const char* search_path) {
1126         char path[STRING_SIZE];
1127
1128         snprintf(path, sizeof(path), "%s/backup.ipf", search_path);
1129         int r = access(path, R_OK);
1130
1131         if (r == 0)
1132                 return strdup(path);
1133
1134         return NULL;
1135 }
1136
1137 int hw_restore_backup(const char* output, const char* backup_path, const char* destination) {
1138         char command[STRING_SIZE];
1139
1140         snprintf(command, sizeof(command), "/bin/tar xzpf %s -C %s", backup_path, destination);
1141         int rc = mysystem(output, command);
1142
1143         if (rc)
1144                 return -1;
1145
1146         return 0;
1147 }