src/cryptsetup/cryptsetup-generator.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4 #include <fcntl.h>
   5 #include <sys/stat.h>
   6 #include <sys/types.h>
   7
   8 #include "alloc-util.h"
   9 #include "dropin.h"
  10 #include "escape.h"
  11 #include "fd-util.h"
  12 #include "fileio.h"
  13 #include "fstab-util.h"
  14 #include "generator.h"
  15 #include "hashmap.h"
  16 #include "id128-util.h"
  17 #include "log.h"
  18 #include "mkdir.h"
  19 #include "parse-util.h"
  20 #include "path-util.h"
  21 #include "proc-cmdline.h"
  22 #include "specifier.h"
  23 #include "string-util.h"
  24 #include "strv.h"
  25 #include "unit-name.h"
  26 #include "util.h"
  27
  28 typedef struct crypto_device {
  29         char *uuid;
  30         char *keyfile;
  31         char *keydev;
  32         char *name;
  33         char *options;
  34         bool create;
  35 } crypto_device;
  36
  37 static const char *arg_dest = NULL;
  38 static bool arg_enabled = true;
  39 static bool arg_read_crypttab = true;
  40 static const char *arg_crypttab = NULL;
  41 static bool arg_whitelist = false;
  42 static Hashmap *arg_disks = NULL;
  43 static char *arg_default_options = NULL;
  44 static char *arg_default_keyfile = NULL;
  45
  46 STATIC_DESTRUCTOR_REGISTER(arg_disks, hashmap_freep);
  47 STATIC_DESTRUCTOR_REGISTER(arg_default_options, freep);
  48 STATIC_DESTRUCTOR_REGISTER(arg_default_keyfile, freep);
  49
  50 static int split_keyspec(const char *keyspec, char **ret_keyfile, char **ret_keydev) {
  51         _cleanup_free_ char *keyfile = NULL, *keydev = NULL;
  52         const char *c;
  53
  54         assert(ret_keyfile);
  55         assert(ret_keydev);
  56
  57         if (!keyspec) {
  58                 *ret_keyfile = *ret_keydev = NULL;
  59                 return 0;
  60         }
  61
  62         c = strrchr(keyspec, ':');
  63         if (c) {
  64                 keyfile = strndup(keyspec, c-keyspec);
  65                 keydev = strdup(c + 1);
  66                 if (!keyfile || !keydev)
  67                         return log_oom();
  68         } else {
  69                 /* No keydev specified */
  70                 keyfile = strdup(keyspec);
  71                 keydev = NULL;
  72                 if (!keyfile)
  73                         return log_oom();
  74         }
  75
  76         *ret_keyfile = TAKE_PTR(keyfile);
  77         *ret_keydev = TAKE_PTR(keydev);
  78
  79         return 0;
  80 }
  81
  82 static int generate_keydev_mount(const char *name, const char *keydev, const char *keydev_timeout, bool canfail, char **unit, char **mount) {
  83         _cleanup_free_ char *u = NULL, *what = NULL, *where = NULL, *name_escaped = NULL, *device_unit = NULL;
  84         _cleanup_fclose_ FILE *f = NULL;
  85         int r;
  86         usec_t timeout_us;
  87
  88         assert(name);
  89         assert(keydev);
  90         assert(unit);
  91         assert(mount);
  92
  93         r = mkdir_parents("/run/systemd/cryptsetup", 0755);
  94         if (r < 0)
  95                 return r;
  96
  97         r = mkdir("/run/systemd/cryptsetup", 0700);
  98         if (r < 0 && errno != EEXIST)
  99                 return -errno;
 100
 101         name_escaped = cescape(name);
 102         if (!name_escaped)
 103                 return -ENOMEM;
 104
 105         where = strjoin("/run/systemd/cryptsetup/keydev-", name_escaped);
 106         if (!where)
 107                 return -ENOMEM;
 108
 109         r = mkdir(where, 0700);
 110         if (r < 0 && errno != EEXIST)
 111                 return -errno;
 112
 113         r = unit_name_from_path(where, ".mount", &u);
 114         if (r < 0)
 115                 return r;
 116
 117         r = generator_open_unit_file(arg_dest, NULL, u, &f);
 118         if (r < 0)
 119                 return r;
 120
 121         what = fstab_node_to_udev_node(keydev);
 122         if (!what)
 123                 return -ENOMEM;
 124
 125         fprintf(f,
 126                 "[Unit]\n"
 127                 "DefaultDependencies=no\n\n"
 128                 "[Mount]\n"
 129                 "What=%s\n"
 130                 "Where=%s\n"
 131                 "Options=ro%s\n", what, where, canfail ? ",nofail" : "");
 132
 133         if (keydev_timeout) {
 134                 r = parse_sec_fix_0(keydev_timeout, &timeout_us);
 135                 if (r >= 0) {
 136                         r = unit_name_from_path(what, ".device", &device_unit);
 137                         if (r < 0)
 138                                 return log_error_errno(r, "Failed to generate unit name: %m");
 139
 140                         r = write_drop_in_format(arg_dest, device_unit, 90, "device-timeout",
 141                                 "# Automatically generated by systemd-cryptsetup-generator \n\n"
 142                                 "[Unit]\nJobRunningTimeoutSec=%s", keydev_timeout);
 143                         if (r < 0)
 144                                 return log_error_errno(r, "Failed to write device drop-in: %m");
 145
 146                 } else
 147                         log_warning_errno(r, "Failed to parse %s, ignoring: %m", keydev_timeout);
 148
 149         }
 150
 151         r = fflush_and_check(f);
 152         if (r < 0)
 153                 return r;
 154
 155         *unit = TAKE_PTR(u);
 156         *mount = TAKE_PTR(where);
 157
 158         return 0;
 159 }
 160
 161 static int print_dependencies(FILE *f, const char* device_path) {
 162         int r;
 163
 164         if (STR_IN_SET(device_path, "-", "none"))
 165                 /* None, nothing to do */
 166                 return 0;
 167
 168         if (PATH_IN_SET(device_path, "/dev/urandom", "/dev/random", "/dev/hw_random")) {
 169                 /* RNG device, add random dep */
 170                 fputs("After=systemd-random-seed.service\n", f);
 171                 return 0;
 172         }
 173
 174         _cleanup_free_ char *udev_node = fstab_node_to_udev_node(device_path);
 175         if (!udev_node)
 176                 return log_oom();
 177
 178         if (path_equal(udev_node, "/dev/null"))
 179                 return 0;
 180
 181         if (path_startswith(udev_node, "/dev/")) {
 182                 /* We are dealing with a block device, add dependency for correspoding unit */
 183                 _cleanup_free_ char *unit = NULL;
 184
 185                 r = unit_name_from_path(udev_node, ".device", &unit);
 186                 if (r < 0)
 187                         return log_error_errno(r, "Failed to generate unit name: %m");
 188
 189                 fprintf(f, "After=%1$s\nRequires=%1$s\n", unit);
 190         } else {
 191                 /* Regular file, add mount dependency */
 192                 _cleanup_free_ char *escaped_path = specifier_escape(device_path);
 193                 if (!escaped_path)
 194                         return log_oom();
 195
 196                 fprintf(f, "RequiresMountsFor=%s\n", escaped_path);
 197         }
 198
 199         return 0;
 200 }
 201
 202 static int create_disk(
 203                 const char *name,
 204                 const char *device,
 205                 const char *password,
 206                 const char *keydev,
 207                 const char *options) {
 208
 209         _cleanup_free_ char *n = NULL, *d = NULL, *u = NULL, *e = NULL,
 210                 *keydev_mount = NULL, *keyfile_timeout_value = NULL, *password_escaped = NULL,
 211                 *filtered = NULL, *u_escaped = NULL, *filtered_escaped = NULL, *name_escaped = NULL, *header_path = NULL;
 212         _cleanup_fclose_ FILE *f = NULL;
 213         const char *dmname;
 214         bool noauto, nofail, tmp, swap, netdev;
 215         int r, detached_header, keyfile_can_timeout;
 216
 217         assert(name);
 218         assert(device);
 219
 220         noauto = fstab_test_yes_no_option(options, "noauto\0" "auto\0");
 221         nofail = fstab_test_yes_no_option(options, "nofail\0" "fail\0");
 222         tmp = fstab_test_option(options, "tmp\0");
 223         swap = fstab_test_option(options, "swap\0");
 224         netdev = fstab_test_option(options, "_netdev\0");
 225
 226         keyfile_can_timeout = fstab_filter_options(options, "keyfile-timeout\0", NULL, &keyfile_timeout_value, NULL);
 227         if (keyfile_can_timeout < 0)
 228                 return log_error_errno(keyfile_can_timeout, "Failed to parse keyfile-timeout= option value: %m");
 229
 230         detached_header = fstab_filter_options(options, "header\0", NULL, &header_path, NULL);
 231         if (detached_header < 0)
 232                 return log_error_errno(detached_header, "Failed to parse header= option value: %m");
 233
 234         if (tmp && swap)
 235                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 236                                        "Device '%s' cannot be both 'tmp' and 'swap'. Ignoring.",
 237                                        name);
 238
 239         name_escaped = specifier_escape(name);
 240         if (!name_escaped)
 241                 return log_oom();
 242
 243         e = unit_name_escape(name);
 244         if (!e)
 245                 return log_oom();
 246
 247         u = fstab_node_to_udev_node(device);
 248         if (!u)
 249                 return log_oom();
 250
 251         r = unit_name_build("systemd-cryptsetup", e, ".service", &n);
 252         if (r < 0)
 253                 return log_error_errno(r, "Failed to generate unit name: %m");
 254
 255         u_escaped = specifier_escape(u);
 256         if (!u_escaped)
 257                 return log_oom();
 258
 259         r = unit_name_from_path(u, ".device", &d);
 260         if (r < 0)
 261                 return log_error_errno(r, "Failed to generate unit name: %m");
 262
 263         if (keydev && !password)
 264                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 265                                        "Key device is specified, but path to the password file is missing.");
 266
 267         r = generator_open_unit_file(arg_dest, NULL, n, &f);
 268         if (r < 0)
 269                 return r;
 270
 271         fprintf(f,
 272                 "[Unit]\n"
 273                 "Description=Cryptography Setup for %%I\n"
 274                 "Documentation=man:crypttab(5) man:systemd-cryptsetup-generator(8) man:systemd-cryptsetup@.service(8)\n"
 275                 "SourcePath=%s\n"
 276                 "DefaultDependencies=no\n"
 277                 "Conflicts=umount.target\n"
 278                 "IgnoreOnIsolate=true\n"
 279                 "After=%s\n",
 280                 arg_crypttab,
 281                 netdev ? "remote-fs-pre.target" : "cryptsetup-pre.target");
 282
 283         if (password) {
 284                 password_escaped = specifier_escape(password);
 285                 if (!password_escaped)
 286                         return log_oom();
 287         }
 288
 289         if (keydev) {
 290                 _cleanup_free_ char *unit = NULL, *p = NULL;
 291
 292                 r = generate_keydev_mount(name, keydev, keyfile_timeout_value, keyfile_can_timeout > 0, &unit, &keydev_mount);
 293                 if (r < 0)
 294                         return log_error_errno(r, "Failed to generate keydev mount unit: %m");
 295
 296                 p = path_join(keydev_mount, password_escaped);
 297                 if (!p)
 298                         return log_oom();
 299
 300                 free_and_replace(password_escaped, p);
 301
 302                 fprintf(f, "After=%s\n", unit);
 303                 if (keyfile_can_timeout > 0)
 304                         fprintf(f, "Wants=%s\n", unit);
 305                 else
 306                         fprintf(f, "Requires=%s\n", unit);
 307         }
 308
 309         if (!nofail)
 310                 fprintf(f,
 311                         "Before=%s\n",
 312                         netdev ? "remote-cryptsetup.target" : "cryptsetup.target");
 313
 314         if (password && !keydev) {
 315                 r = print_dependencies(f, password);
 316                 if (r < 0)
 317                         return r;
 318         }
 319
 320         /* Check if a header option was specified */
 321         if (detached_header > 0) {
 322                 r = print_dependencies(f, header_path);
 323                 if (r < 0)
 324                         return r;
 325         }
 326
 327         if (path_startswith(u, "/dev/")) {
 328                 fprintf(f,
 329                         "BindsTo=%s\n"
 330                         "After=%s\n"
 331                         "Before=umount.target\n",
 332                         d, d);
 333
 334                 if (swap)
 335                         fputs("Before=dev-mapper-%i.swap\n",
 336                               f);
 337         } else
 338                 /* For loopback devices, add systemd-tmpfiles-setup-dev.service
 339                    dependency to ensure that loopback support is available in
 340                    the kernel (/dev/loop-control needs to exist) */
 341                 fprintf(f,
 342                         "RequiresMountsFor=%s\n"
 343                         "Requires=systemd-tmpfiles-setup-dev.service\n"
 344                         "After=systemd-tmpfiles-setup-dev.service\n",
 345                         u_escaped);
 346
 347         r = generator_write_timeouts(arg_dest, device, name, options, &filtered);
 348         if (r < 0)
 349                 return r;
 350
 351         if (filtered) {
 352                 filtered_escaped = specifier_escape(filtered);
 353                 if (!filtered_escaped)
 354                         return log_oom();
 355         }
 356
 357         fprintf(f,
 358                 "\n[Service]\n"
 359                 "Type=oneshot\n"
 360                 "RemainAfterExit=yes\n"
 361                 "TimeoutSec=0\n" /* the binary handles timeouts anyway */
 362                 "KeyringMode=shared\n" /* make sure we can share cached keys among instances */
 363                 "OOMScoreAdjust=500\n" /* unlocking can allocate a lot of memory if Argon2 is used */
 364                 "ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '%s' '%s'\n"
 365                 "ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n",
 366                 name_escaped, u_escaped, strempty(password_escaped), strempty(filtered_escaped),
 367                 name_escaped);
 368
 369         if (tmp)
 370                 fprintf(f,
 371                         "ExecStartPost=/sbin/mke2fs '/dev/mapper/%s'\n",
 372                         name_escaped);
 373
 374         if (swap)
 375                 fprintf(f,
 376                         "ExecStartPost=/sbin/mkswap '/dev/mapper/%s'\n",
 377                         name_escaped);
 378
 379         if (keydev)
 380                 fprintf(f,
 381                         "ExecStartPost=-" UMOUNT_PATH " %s\n\n",
 382                         keydev_mount);
 383
 384         r = fflush_and_check(f);
 385         if (r < 0)
 386                 return log_error_errno(r, "Failed to write unit file %s: %m", n);
 387
 388         if (!noauto) {
 389                 r = generator_add_symlink(arg_dest,
 390                                           netdev ? "remote-cryptsetup.target" : "cryptsetup.target",
 391                                           nofail ? "wants" : "requires", n);
 392                 if (r < 0)
 393                         return r;
 394         }
 395
 396         dmname = strjoina("dev-mapper-", e, ".device");
 397         r = generator_add_symlink(arg_dest, dmname, "requires", n);
 398         if (r < 0)
 399                 return r;
 400
 401         if (!noauto && !nofail) {
 402                 r = write_drop_in(arg_dest, dmname, 90, "device-timeout",
 403                                   "# Automatically generated by systemd-cryptsetup-generator \n\n"
 404                                   "[Unit]\nJobTimeoutSec=0");
 405                 if (r < 0)
 406                         return log_error_errno(r, "Failed to write device drop-in: %m");
 407         }
 408
 409         return 0;
 410 }
 411
 412 static crypto_device* crypt_device_free(crypto_device *d) {
 413         if (!d)
 414                 return NULL;
 415
 416         free(d->uuid);
 417         free(d->keyfile);
 418         free(d->keydev);
 419         free(d->name);
 420         free(d->options);
 421         return mfree(d);
 422 }
 423
 424 static crypto_device *get_crypto_device(const char *uuid) {
 425         int r;
 426         crypto_device *d;
 427
 428         assert(uuid);
 429
 430         d = hashmap_get(arg_disks, uuid);
 431         if (!d) {
 432                 d = new0(struct crypto_device, 1);
 433                 if (!d)
 434                         return NULL;
 435
 436                 d->uuid = strdup(uuid);
 437                 if (!d->uuid)
 438                         return mfree(d);
 439
 440                 r = hashmap_put(arg_disks, d->uuid, d);
 441                 if (r < 0) {
 442                         free(d->uuid);
 443                         return mfree(d);
 444                 }
 445         }
 446
 447         return d;
 448 }
 449
 450 static int parse_proc_cmdline_item(const char *key, const char *value, void *data) {
 451         _cleanup_free_ char *uuid = NULL, *uuid_value = NULL;
 452         crypto_device *d;
 453         int r;
 454
 455         if (streq(key, "luks")) {
 456
 457                 r = value ? parse_boolean(value) : 1;
 458                 if (r < 0)
 459                         log_warning("Failed to parse luks= kernel command line switch %s. Ignoring.", value);
 460                 else
 461                         arg_enabled = r;
 462
 463         } else if (streq(key, "luks.crypttab")) {
 464
 465                 r = value ? parse_boolean(value) : 1;
 466                 if (r < 0)
 467                         log_warning("Failed to parse luks.crypttab= kernel command line switch %s. Ignoring.", value);
 468                 else
 469                         arg_read_crypttab = r;
 470
 471         } else if (streq(key, "luks.uuid")) {
 472
 473                 if (proc_cmdline_value_missing(key, value))
 474                         return 0;
 475
 476                 d = get_crypto_device(startswith(value, "luks-") ? value+5 : value);
 477                 if (!d)
 478                         return log_oom();
 479
 480                 d->create = arg_whitelist = true;
 481
 482         } else if (streq(key, "luks.options")) {
 483
 484                 if (proc_cmdline_value_missing(key, value))
 485                         return 0;
 486
 487                 r = sscanf(value, "%m[0-9a-fA-F-]=%ms", &uuid, &uuid_value);
 488                 if (r == 2) {
 489                         d = get_crypto_device(uuid);
 490                         if (!d)
 491                                 return log_oom();
 492
 493                         free_and_replace(d->options, uuid_value);
 494                 } else if (free_and_strdup(&arg_default_options, value) < 0)
 495                         return log_oom();
 496
 497         } else if (streq(key, "luks.key")) {
 498                 size_t n;
 499                 _cleanup_free_ char *keyfile = NULL, *keydev = NULL;
 500                 const char *keyspec;
 501
 502                 if (proc_cmdline_value_missing(key, value))
 503                         return 0;
 504
 505                 n = strspn(value, LETTERS DIGITS "-");
 506                 if (value[n] != '=') {
 507                         if (free_and_strdup(&arg_default_keyfile, value) < 0)
 508                                  return log_oom();
 509                         return 0;
 510                 }
 511
 512                 uuid = strndup(value, n);
 513                 if (!uuid)
 514                         return log_oom();
 515
 516                 if (!id128_is_valid(uuid)) {
 517                         log_warning("Failed to parse luks.key= kernel command line switch. UUID is invalid, ignoring.");
 518                         return 0;
 519                 }
 520
 521                 d = get_crypto_device(uuid);
 522                 if (!d)
 523                         return log_oom();
 524
 525                 keyspec = value + n + 1;
 526                 r = split_keyspec(keyspec, &keyfile, &keydev);
 527                 if (r < 0)
 528                         return r;
 529
 530                 free_and_replace(d->keyfile, keyfile);
 531                 free_and_replace(d->keydev, keydev);
 532
 533         } else if (streq(key, "luks.name")) {
 534
 535                 if (proc_cmdline_value_missing(key, value))
 536                         return 0;
 537
 538                 r = sscanf(value, "%m[0-9a-fA-F-]=%ms", &uuid, &uuid_value);
 539                 if (r == 2) {
 540                         d = get_crypto_device(uuid);
 541                         if (!d)
 542                                 return log_oom();
 543
 544                         d->create = arg_whitelist = true;
 545
 546                         free_and_replace(d->name, uuid_value);
 547                 } else
 548                         log_warning("Failed to parse luks name switch %s. Ignoring.", value);
 549         }
 550
 551         return 0;
 552 }
 553
 554 static int add_crypttab_devices(void) {
 555         _cleanup_fclose_ FILE *f = NULL;
 556         unsigned crypttab_line = 0;
 557         struct stat st;
 558         int r;
 559
 560         if (!arg_read_crypttab)
 561                 return 0;
 562
 563         r = fopen_unlocked(arg_crypttab, "re", &f);
 564         if (r < 0) {
 565                 if (errno != ENOENT)
 566                         log_error_errno(errno, "Failed to open %s: %m", arg_crypttab);
 567                 return 0;
 568         }
 569
 570         if (fstat(fileno(f), &st) < 0) {
 571                 log_error_errno(errno, "Failed to stat %s: %m", arg_crypttab);
 572                 return 0;
 573         }
 574
 575         for (;;) {
 576                 _cleanup_free_ char *line = NULL, *name = NULL, *device = NULL, *keyspec = NULL, *options = NULL, *keyfile = NULL, *keydev = NULL;
 577                 crypto_device *d = NULL;
 578                 char *l, *uuid;
 579                 int k;
 580
 581                 r = read_line(f, LONG_LINE_MAX, &line);
 582                 if (r < 0)
 583                         return log_error_errno(r, "Failed to read %s: %m", arg_crypttab);
 584                 if (r == 0)
 585                         break;
 586
 587                 crypttab_line++;
 588
 589                 l = strstrip(line);
 590                 if (IN_SET(l[0], 0, '#'))
 591                         continue;
 592
 593                 k = sscanf(l, "%ms %ms %ms %ms", &name, &device, &keyspec, &options);
 594                 if (k < 2 || k > 4) {
 595                         log_error("Failed to parse %s:%u, ignoring.", arg_crypttab, crypttab_line);
 596                         continue;
 597                 }
 598
 599                 uuid = startswith(device, "UUID=");
 600                 if (!uuid)
 601                         uuid = path_startswith(device, "/dev/disk/by-uuid/");
 602                 if (!uuid)
 603                         uuid = startswith(name, "luks-");
 604                 if (uuid)
 605                         d = hashmap_get(arg_disks, uuid);
 606
 607                 if (arg_whitelist && !d) {
 608                         log_info("Not creating device '%s' because it was not specified on the kernel command line.", name);
 609                         continue;
 610                 }
 611
 612                 r = split_keyspec(keyspec, &keyfile, &keydev);
 613                 if (r < 0)
 614                         return r;
 615
 616                 r = create_disk(name, device, keyfile, keydev, (d && d->options) ? d->options : options);
 617                 if (r < 0)
 618                         return r;
 619
 620                 if (d)
 621                         d->create = false;
 622         }
 623
 624         return 0;
 625 }
 626
 627 static int add_proc_cmdline_devices(void) {
 628         int r;
 629         Iterator i;
 630         crypto_device *d;
 631
 632         HASHMAP_FOREACH(d, arg_disks, i) {
 633                 const char *options;
 634                 _cleanup_free_ char *device = NULL;
 635
 636                 if (!d->create)
 637                         continue;
 638
 639                 if (!d->name) {
 640                         d->name = strjoin("luks-", d->uuid);
 641                         if (!d->name)
 642                                 return log_oom();
 643                 }
 644
 645                 device = strjoin("UUID=", d->uuid);
 646                 if (!device)
 647                         return log_oom();
 648
 649                 if (d->options)
 650                         options = d->options;
 651                 else if (arg_default_options)
 652                         options = arg_default_options;
 653                 else
 654                         options = "timeout=0";
 655
 656                 r = create_disk(d->name, device, d->keyfile ?: arg_default_keyfile, d->keydev, options);
 657                 if (r < 0)
 658                         return r;
 659         }
 660
 661         return 0;
 662 }
 663
 664 DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(crypt_device_hash_ops, char, string_hash_func, string_compare_func,
 665                                               crypto_device, crypt_device_free);
 666
 667 static int run(const char *dest, const char *dest_early, const char *dest_late) {
 668         int r;
 669
 670         assert_se(arg_dest = dest);
 671
 672         arg_crypttab = getenv("SYSTEMD_CRYPTTAB") ?: "/etc/crypttab";
 673
 674         arg_disks = hashmap_new(&crypt_device_hash_ops);
 675         if (!arg_disks)
 676                 return log_oom();
 677
 678         r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX);
 679         if (r < 0)
 680                 return log_warning_errno(r, "Failed to parse kernel command line: %m");
 681
 682         if (!arg_enabled)
 683                 return 0;
 684
 685         r = add_crypttab_devices();
 686         if (r < 0)
 687                 return r;
 688
 689         r = add_proc_cmdline_devices();
 690         if (r < 0)
 691                 return r;
 692
 693         return 0;
 694 }
 695
 696 DEFINE_MAIN_GENERATOR_FUNCTION(run);