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 const char *arg_runtime_directory = NULL;
  42 static bool arg_allow_list = false;
  43 static Hashmap *arg_disks = NULL;
  44 static char *arg_default_options = NULL;
  45 static char *arg_default_keyfile = NULL;
  46
  47 STATIC_DESTRUCTOR_REGISTER(arg_disks, hashmap_freep);
  48 STATIC_DESTRUCTOR_REGISTER(arg_default_options, freep);
  49 STATIC_DESTRUCTOR_REGISTER(arg_default_keyfile, freep);
  50
  51 static int split_keyspec(const char *keyspec, char **ret_keyfile, char **ret_keydev) {
  52         _cleanup_free_ char *keyfile = NULL, *keydev = NULL;
  53         const char *c;
  54
  55         assert(ret_keyfile);
  56         assert(ret_keydev);
  57
  58         if (!keyspec) {
  59                 *ret_keyfile = *ret_keydev = NULL;
  60                 return 0;
  61         }
  62
  63         c = strrchr(keyspec, ':');
  64         if (c) {
  65                 /* The keydev part has to be either an absolute path to device node (/dev/something,
  66                  * /dev/foo/something, or even possibly /dev/foo/something:part), or a fstab device
  67                  * specification starting with LABEL= or similar. The keyfile part has the same syntax.
  68                  *
  69                  * Let's try to guess if the second part looks like a keydev specification, or just part of a
  70                  * filename with a colon. fstab_node_to_udev_node() will convert the fstab device syntax to
  71                  * an absolute path. If we didn't get an absolute path, assume that it is just part of the
  72                  * first keyfile argument. */
  73
  74                 keydev = fstab_node_to_udev_node(c + 1);
  75                 if (!keydev)
  76                         return log_oom();
  77
  78                 if (path_is_absolute(keydev))
  79                         keyfile = strndup(keyspec, c-keyspec);
  80                 else {
  81                         log_debug("Keyspec argument contains a colon, but \"%s\" doesn't look like a device specification.\n"
  82                                   "Assuming that \"%s\" is a single device specification.",
  83                                   c + 1, keyspec);
  84                         keydev = mfree(keydev);
  85                         c = NULL;
  86                 }
  87         }
  88
  89         if (!c)
  90                 /* No keydev specified */
  91                 keyfile = strdup(keyspec);
  92
  93         if (!keyfile)
  94                 return log_oom();
  95
  96         *ret_keyfile = TAKE_PTR(keyfile);
  97         *ret_keydev = TAKE_PTR(keydev);
  98
  99         return 0;
 100 }
 101
 102 static int generate_keydev_mount(
 103                 const char *name,
 104                 const char *keydev,
 105                 const char *keydev_timeout,
 106                 bool canfail,
 107                 char **unit,
 108                 char **mount) {
 109
 110         _cleanup_free_ char *u = NULL, *where = NULL, *name_escaped = NULL, *device_unit = NULL;
 111         _cleanup_fclose_ FILE *f = NULL;
 112         int r;
 113         usec_t timeout_us;
 114
 115         assert(name);
 116         assert(keydev);
 117         assert(unit);
 118         assert(mount);
 119
 120         r = mkdir_parents(arg_runtime_directory, 0755);
 121         if (r < 0)
 122                 return r;
 123
 124         r = mkdir(arg_runtime_directory, 0700);
 125         if (r < 0 && errno != EEXIST)
 126                 return -errno;
 127
 128         name_escaped = cescape(name);
 129         if (!name_escaped)
 130                 return -ENOMEM;
 131
 132         where = strjoin(arg_runtime_directory, "/keydev-", name_escaped);
 133         if (!where)
 134                 return -ENOMEM;
 135
 136         r = mkdir(where, 0700);
 137         if (r < 0 && errno != EEXIST)
 138                 return -errno;
 139
 140         r = unit_name_from_path(where, ".mount", &u);
 141         if (r < 0)
 142                 return r;
 143
 144         r = generator_open_unit_file(arg_dest, NULL, u, &f);
 145         if (r < 0)
 146                 return r;
 147
 148         fprintf(f,
 149                 "[Unit]\n"
 150                 "DefaultDependencies=no\n\n"
 151                 "[Mount]\n"
 152                 "What=%s\n"
 153                 "Where=%s\n"
 154                 "Options=ro%s\n", keydev, where, canfail ? ",nofail" : "");
 155
 156         if (keydev_timeout) {
 157                 r = parse_sec_fix_0(keydev_timeout, &timeout_us);
 158                 if (r >= 0) {
 159                         r = unit_name_from_path(keydev, ".device", &device_unit);
 160                         if (r < 0)
 161                                 return log_error_errno(r, "Failed to generate unit name: %m");
 162
 163                         r = write_drop_in_format(arg_dest, device_unit, 90, "device-timeout",
 164                                 "# Automatically generated by systemd-cryptsetup-generator \n\n"
 165                                 "[Unit]\nJobRunningTimeoutSec=%s", keydev_timeout);
 166                         if (r < 0)
 167                                 return log_error_errno(r, "Failed to write device drop-in: %m");
 168
 169                 } else
 170                         log_warning_errno(r, "Failed to parse %s, ignoring: %m", keydev_timeout);
 171
 172         }
 173
 174         r = fflush_and_check(f);
 175         if (r < 0)
 176                 return r;
 177
 178         *unit = TAKE_PTR(u);
 179         *mount = TAKE_PTR(where);
 180
 181         return 0;
 182 }
 183
 184 static int generate_keydev_umount(const char *name,
 185                                   const char *keydev_mount,
 186                                   char **ret_umount_unit) {
 187         _cleanup_fclose_ FILE *f = NULL;
 188         _cleanup_free_ char *u = NULL, *name_escaped = NULL, *mount = NULL;
 189         int r;
 190
 191         assert(name);
 192         assert(ret_umount_unit);
 193
 194         name_escaped = cescape(name);
 195         if (!name_escaped)
 196                 return -ENOMEM;
 197
 198         u = strjoin("keydev-", name_escaped, "-umount.service");
 199         if (!u)
 200                 return -ENOMEM;
 201
 202         r = unit_name_from_path(keydev_mount, ".mount", &mount);
 203         if (r < 0)
 204                 return r;
 205
 206         r = generator_open_unit_file(arg_dest, NULL, u, &f);
 207         if (r < 0)
 208                 return r;
 209
 210         fprintf(f,
 211                 "[Unit]\n"
 212                 "DefaultDependencies=no\n"
 213                 "After=%s\n\n"
 214                 "[Service]\n"
 215                 "ExecStart=-" UMOUNT_PATH " %s\n\n", mount, keydev_mount);
 216
 217         r = fflush_and_check(f);
 218         if (r < 0)
 219                 return r;
 220
 221         *ret_umount_unit = TAKE_PTR(u);
 222         return 0;
 223 }
 224
 225 static int print_dependencies(FILE *f, const char* device_path) {
 226         int r;
 227
 228         if (STR_IN_SET(device_path, "-", "none"))
 229                 /* None, nothing to do */
 230                 return 0;
 231
 232         if (PATH_IN_SET(device_path,
 233                         "/dev/urandom",
 234                         "/dev/random",
 235                         "/dev/hw_random",
 236                         "/dev/hwrng")) {
 237                 /* RNG device, add random dep */
 238                 fputs("After=systemd-random-seed.service\n", f);
 239                 return 0;
 240         }
 241
 242         _cleanup_free_ char *udev_node = fstab_node_to_udev_node(device_path);
 243         if (!udev_node)
 244                 return log_oom();
 245
 246         if (path_equal(udev_node, "/dev/null"))
 247                 return 0;
 248
 249         if (path_startswith(udev_node, "/dev/")) {
 250                 /* We are dealing with a block device, add dependency for corresponding unit */
 251                 _cleanup_free_ char *unit = NULL;
 252
 253                 r = unit_name_from_path(udev_node, ".device", &unit);
 254                 if (r < 0)
 255                         return log_error_errno(r, "Failed to generate unit name: %m");
 256
 257                 fprintf(f,
 258                         "After=%1$s\n"
 259                         "Requires=%1$s\n", unit);
 260         } else {
 261                 /* Regular file, add mount dependency */
 262                 _cleanup_free_ char *escaped_path = specifier_escape(device_path);
 263                 if (!escaped_path)
 264                         return log_oom();
 265
 266                 fprintf(f, "RequiresMountsFor=%s\n", escaped_path);
 267         }
 268
 269         return 0;
 270 }
 271
 272 static int create_disk(
 273                 const char *name,
 274                 const char *device,
 275                 const char *password,
 276                 const char *keydev,
 277                 const char *options,
 278                 const char *source) {
 279
 280         _cleanup_free_ char *n = NULL, *d = NULL, *u = NULL, *e = NULL,
 281                 *keydev_mount = NULL, *keyfile_timeout_value = NULL,
 282                 *filtered = NULL, *u_escaped = NULL, *name_escaped = NULL, *header_path = NULL, *password_buffer = NULL,
 283                 *tmp_fstype = NULL;
 284         _cleanup_fclose_ FILE *f = NULL;
 285         const char *dmname;
 286         bool noauto, nofail, swap, netdev, attach_in_initrd;
 287         int r, detached_header, keyfile_can_timeout, tmp;
 288
 289         assert(name);
 290         assert(device);
 291
 292         noauto = fstab_test_yes_no_option(options, "noauto\0" "auto\0");
 293         nofail = fstab_test_yes_no_option(options, "nofail\0" "fail\0");
 294         swap = fstab_test_option(options, "swap\0");
 295         netdev = fstab_test_option(options, "_netdev\0");
 296         attach_in_initrd = fstab_test_option(options, "x-initrd.attach\0");
 297
 298         keyfile_can_timeout = fstab_filter_options(options, "keyfile-timeout\0", NULL, &keyfile_timeout_value, NULL);
 299         if (keyfile_can_timeout < 0)
 300                 return log_error_errno(keyfile_can_timeout, "Failed to parse keyfile-timeout= option value: %m");
 301
 302         detached_header = fstab_filter_options(options, "header\0", NULL, &header_path, NULL);
 303         if (detached_header < 0)
 304                 return log_error_errno(detached_header, "Failed to parse header= option value: %m");
 305
 306         tmp = fstab_filter_options(options, "tmp\0", NULL, &tmp_fstype, NULL);
 307         if (tmp < 0)
 308                 return log_error_errno(tmp, "Failed to parse tmp= option value: %m");
 309
 310         if (tmp && swap)
 311                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 312                                        "Device '%s' cannot be both 'tmp' and 'swap'. Ignoring.",
 313                                        name);
 314
 315         name_escaped = specifier_escape(name);
 316         if (!name_escaped)
 317                 return log_oom();
 318
 319         e = unit_name_escape(name);
 320         if (!e)
 321                 return log_oom();
 322
 323         u = fstab_node_to_udev_node(device);
 324         if (!u)
 325                 return log_oom();
 326
 327         r = unit_name_build("systemd-cryptsetup", e, ".service", &n);
 328         if (r < 0)
 329                 return log_error_errno(r, "Failed to generate unit name: %m");
 330
 331         u_escaped = specifier_escape(u);
 332         if (!u_escaped)
 333                 return log_oom();
 334
 335         r = unit_name_from_path(u, ".device", &d);
 336         if (r < 0)
 337                 return log_error_errno(r, "Failed to generate unit name: %m");
 338
 339         if (keydev && !password)
 340                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 341                                        "Key device is specified, but path to the password file is missing.");
 342
 343         r = generator_open_unit_file(arg_dest, NULL, n, &f);
 344         if (r < 0)
 345                 return r;
 346
 347         r = generator_write_cryptsetup_unit_section(f, source);
 348         if (r < 0)
 349                 return r;
 350
 351         if (netdev)
 352                 fprintf(f, "After=remote-fs-pre.target\n");
 353
 354         /* If initrd takes care of attaching the disk then it should also detach it during shutdown. */
 355         if (!attach_in_initrd)
 356                 fprintf(f, "Conflicts=umount.target\n");
 357
 358         if (keydev) {
 359                 _cleanup_free_ char *unit = NULL, *umount_unit = NULL;
 360
 361                 r = generate_keydev_mount(name, keydev, keyfile_timeout_value, keyfile_can_timeout > 0, &unit, &keydev_mount);
 362                 if (r < 0)
 363                         return log_error_errno(r, "Failed to generate keydev mount unit: %m");
 364
 365                 r = generate_keydev_umount(name, keydev_mount, &umount_unit);
 366                 if (r < 0)
 367                         return log_error_errno(r, "Failed to generate keydev umount unit: %m");
 368
 369                 password_buffer = path_join(keydev_mount, password);
 370                 if (!password_buffer)
 371                         return log_oom();
 372
 373                 password = password_buffer;
 374
 375                 fprintf(f, "After=%s\n", unit);
 376                 if (keyfile_can_timeout > 0)
 377                         fprintf(f, "Wants=%s\n", unit);
 378                 else
 379                         fprintf(f, "Requires=%s\n", unit);
 380
 381                 if (umount_unit)
 382                         fprintf(f,
 383                                 "Wants=%s\n"
 384                                 "Before=%s\n",
 385                                 umount_unit,
 386                                 umount_unit
 387                         );
 388         }
 389
 390         if (!nofail)
 391                 fprintf(f,
 392                         "Before=%s\n",
 393                         netdev ? "remote-cryptsetup.target" : "cryptsetup.target");
 394
 395         if (password && !keydev) {
 396                 r = print_dependencies(f, password);
 397                 if (r < 0)
 398                         return r;
 399         }
 400
 401         /* Check if a header option was specified */
 402         if (detached_header > 0) {
 403                 r = print_dependencies(f, header_path);
 404                 if (r < 0)
 405                         return r;
 406         }
 407
 408         if (path_startswith(u, "/dev/"))
 409                 fprintf(f,
 410                         "BindsTo=%s\n"
 411                         "After=%s\n"
 412                         "Before=umount.target\n",
 413                         d, d);
 414         else
 415                 /* For loopback devices, add systemd-tmpfiles-setup-dev.service
 416                    dependency to ensure that loopback support is available in
 417                    the kernel (/dev/loop-control needs to exist) */
 418                 fprintf(f,
 419                         "RequiresMountsFor=%s\n"
 420                         "Requires=systemd-tmpfiles-setup-dev.service\n"
 421                         "After=systemd-tmpfiles-setup-dev.service\n",
 422                         u_escaped);
 423
 424         r = generator_write_timeouts(arg_dest, device, name, options, &filtered);
 425         if (r < 0)
 426                 log_warning_errno(r, "Failed to write device timeout drop-in: %m");
 427
 428         r = generator_write_cryptsetup_service_section(f, name, u, password, filtered);
 429         if (r < 0)
 430                 return r;
 431
 432         if (tmp) {
 433                 _cleanup_free_ char *tmp_fstype_escaped = NULL;
 434
 435                 if (tmp_fstype) {
 436                         tmp_fstype_escaped = specifier_escape(tmp_fstype);
 437                         if (!tmp_fstype_escaped)
 438                                 return log_oom();
 439                 }
 440
 441                 fprintf(f,
 442                         "ExecStartPost=" ROOTLIBEXECDIR "/systemd-makefs '%s' '/dev/mapper/%s'\n",
 443                         tmp_fstype_escaped ?: "ext4", name_escaped);
 444         }
 445
 446         if (swap)
 447                 fprintf(f,
 448                         "ExecStartPost=" ROOTLIBEXECDIR "/systemd-makefs swap '/dev/mapper/%s'\n",
 449                         name_escaped);
 450
 451         r = fflush_and_check(f);
 452         if (r < 0)
 453                 return log_error_errno(r, "Failed to write unit file %s: %m", n);
 454
 455         if (!noauto) {
 456                 r = generator_add_symlink(arg_dest,
 457                                           netdev ? "remote-cryptsetup.target" : "cryptsetup.target",
 458                                           nofail ? "wants" : "requires", n);
 459                 if (r < 0)
 460                         return r;
 461         }
 462
 463         dmname = strjoina("dev-mapper-", e, ".device");
 464         r = generator_add_symlink(arg_dest, dmname, "requires", n);
 465         if (r < 0)
 466                 return r;
 467
 468         if (!noauto && !nofail) {
 469                 r = write_drop_in(arg_dest, dmname, 40, "device-timeout",
 470                                   "# Automatically generated by systemd-cryptsetup-generator\n\n"
 471                                   "[Unit]\nJobTimeoutSec=0");
 472                 if (r < 0)
 473                         log_warning_errno(r, "Failed to write device timeout drop-in: %m");
 474         }
 475
 476         return 0;
 477 }
 478
 479 static crypto_device* crypt_device_free(crypto_device *d) {
 480         if (!d)
 481                 return NULL;
 482
 483         free(d->uuid);
 484         free(d->keyfile);
 485         free(d->keydev);
 486         free(d->name);
 487         free(d->options);
 488         return mfree(d);
 489 }
 490
 491 static crypto_device *get_crypto_device(const char *uuid) {
 492         int r;
 493         crypto_device *d;
 494
 495         assert(uuid);
 496
 497         d = hashmap_get(arg_disks, uuid);
 498         if (!d) {
 499                 d = new0(struct crypto_device, 1);
 500                 if (!d)
 501                         return NULL;
 502
 503                 d->uuid = strdup(uuid);
 504                 if (!d->uuid)
 505                         return mfree(d);
 506
 507                 r = hashmap_put(arg_disks, d->uuid, d);
 508                 if (r < 0) {
 509                         free(d->uuid);
 510                         return mfree(d);
 511                 }
 512         }
 513
 514         return d;
 515 }
 516
 517 static int parse_proc_cmdline_item(const char *key, const char *value, void *data) {
 518         _cleanup_free_ char *uuid = NULL, *uuid_value = NULL;
 519         crypto_device *d;
 520         int r;
 521
 522         if (streq(key, "luks")) {
 523
 524                 r = value ? parse_boolean(value) : 1;
 525                 if (r < 0)
 526                         log_warning("Failed to parse luks= kernel command line switch %s. Ignoring.", value);
 527                 else
 528                         arg_enabled = r;
 529
 530         } else if (streq(key, "luks.crypttab")) {
 531
 532                 r = value ? parse_boolean(value) : 1;
 533                 if (r < 0)
 534                         log_warning("Failed to parse luks.crypttab= kernel command line switch %s. Ignoring.", value);
 535                 else
 536                         arg_read_crypttab = r;
 537
 538         } else if (streq(key, "luks.uuid")) {
 539
 540                 if (proc_cmdline_value_missing(key, value))
 541                         return 0;
 542
 543                 d = get_crypto_device(startswith(value, "luks-") ?: value);
 544                 if (!d)
 545                         return log_oom();
 546
 547                 d->create = arg_allow_list = true;
 548
 549         } else if (streq(key, "luks.options")) {
 550
 551                 if (proc_cmdline_value_missing(key, value))
 552                         return 0;
 553
 554                 r = sscanf(value, "%m[0-9a-fA-F-]=%ms", &uuid, &uuid_value);
 555                 if (r == 2) {
 556                         d = get_crypto_device(uuid);
 557                         if (!d)
 558                                 return log_oom();
 559
 560                         free_and_replace(d->options, uuid_value);
 561                 } else if (free_and_strdup(&arg_default_options, value) < 0)
 562                         return log_oom();
 563
 564         } else if (streq(key, "luks.key")) {
 565                 size_t n;
 566                 _cleanup_free_ char *keyfile = NULL, *keydev = NULL;
 567                 const char *keyspec;
 568
 569                 if (proc_cmdline_value_missing(key, value))
 570                         return 0;
 571
 572                 n = strspn(value, LETTERS DIGITS "-");
 573                 if (value[n] != '=') {
 574                         if (free_and_strdup(&arg_default_keyfile, value) < 0)
 575                                  return log_oom();
 576                         return 0;
 577                 }
 578
 579                 uuid = strndup(value, n);
 580                 if (!uuid)
 581                         return log_oom();
 582
 583                 if (!id128_is_valid(uuid)) {
 584                         log_warning("Failed to parse luks.key= kernel command line switch. UUID is invalid, ignoring.");
 585                         return 0;
 586                 }
 587
 588                 d = get_crypto_device(uuid);
 589                 if (!d)
 590                         return log_oom();
 591
 592                 keyspec = value + n + 1;
 593                 r = split_keyspec(keyspec, &keyfile, &keydev);
 594                 if (r < 0)
 595                         return r;
 596
 597                 free_and_replace(d->keyfile, keyfile);
 598                 free_and_replace(d->keydev, keydev);
 599
 600         } else if (streq(key, "luks.name")) {
 601
 602                 if (proc_cmdline_value_missing(key, value))
 603                         return 0;
 604
 605                 r = sscanf(value, "%m[0-9a-fA-F-]=%ms", &uuid, &uuid_value);
 606                 if (r == 2) {
 607                         d = get_crypto_device(uuid);
 608                         if (!d)
 609                                 return log_oom();
 610
 611                         d->create = arg_allow_list = true;
 612
 613                         free_and_replace(d->name, uuid_value);
 614                 } else
 615                         log_warning("Failed to parse luks name switch %s. Ignoring.", value);
 616         }
 617
 618         return 0;
 619 }
 620
 621 static int add_crypttab_devices(void) {
 622         _cleanup_fclose_ FILE *f = NULL;
 623         unsigned crypttab_line = 0;
 624         int r;
 625
 626         if (!arg_read_crypttab)
 627                 return 0;
 628
 629         r = fopen_unlocked(arg_crypttab, "re", &f);
 630         if (r < 0) {
 631                 if (errno != ENOENT)
 632                         log_error_errno(errno, "Failed to open %s: %m", arg_crypttab);
 633                 return 0;
 634         }
 635
 636         for (;;) {
 637                 _cleanup_free_ char *line = NULL, *name = NULL, *device = NULL, *keyspec = NULL, *options = NULL, *keyfile = NULL, *keydev = NULL;
 638                 crypto_device *d = NULL;
 639                 char *l, *uuid;
 640                 int k;
 641
 642                 r = read_line(f, LONG_LINE_MAX, &line);
 643                 if (r < 0)
 644                         return log_error_errno(r, "Failed to read %s: %m", arg_crypttab);
 645                 if (r == 0)
 646                         break;
 647
 648                 crypttab_line++;
 649
 650                 l = strstrip(line);
 651                 if (IN_SET(l[0], 0, '#'))
 652                         continue;
 653
 654                 k = sscanf(l, "%ms %ms %ms %ms", &name, &device, &keyspec, &options);
 655                 if (k < 2 || k > 4) {
 656                         log_error("Failed to parse %s:%u, ignoring.", arg_crypttab, crypttab_line);
 657                         continue;
 658                 }
 659
 660                 uuid = startswith(device, "UUID=");
 661                 if (!uuid)
 662                         uuid = path_startswith(device, "/dev/disk/by-uuid/");
 663                 if (!uuid)
 664                         uuid = startswith(name, "luks-");
 665                 if (uuid)
 666                         d = hashmap_get(arg_disks, uuid);
 667
 668                 if (arg_allow_list && !d) {
 669                         log_info("Not creating device '%s' because it was not specified on the kernel command line.", name);
 670                         continue;
 671                 }
 672
 673                 r = split_keyspec(keyspec, &keyfile, &keydev);
 674                 if (r < 0)
 675                         return r;
 676
 677                 r = create_disk(name, device, keyfile, keydev, (d && d->options) ? d->options : options, arg_crypttab);
 678                 if (r < 0)
 679                         return r;
 680
 681                 if (d)
 682                         d->create = false;
 683         }
 684
 685         return 0;
 686 }
 687
 688 static int add_proc_cmdline_devices(void) {
 689         int r;
 690         crypto_device *d;
 691
 692         HASHMAP_FOREACH(d, arg_disks) {
 693                 _cleanup_free_ char *device = NULL;
 694
 695                 if (!d->create)
 696                         continue;
 697
 698                 if (!d->name) {
 699                         d->name = strjoin("luks-", d->uuid);
 700                         if (!d->name)
 701                                 return log_oom();
 702                 }
 703
 704                 device = strjoin("UUID=", d->uuid);
 705                 if (!device)
 706                         return log_oom();
 707
 708                 r = create_disk(d->name,
 709                                 device,
 710                                 d->keyfile ?: arg_default_keyfile,
 711                                 d->keydev,
 712                                 d->options ?: arg_default_options,
 713                                 "/proc/cmdline");
 714                 if (r < 0)
 715                         return r;
 716         }
 717
 718         return 0;
 719 }
 720
 721 DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(crypt_device_hash_ops, char, string_hash_func, string_compare_func,
 722                                               crypto_device, crypt_device_free);
 723
 724 static int run(const char *dest, const char *dest_early, const char *dest_late) {
 725         int r;
 726
 727         assert_se(arg_dest = dest);
 728
 729         arg_crypttab = getenv("SYSTEMD_CRYPTTAB") ?: "/etc/crypttab";
 730         arg_runtime_directory = getenv("RUNTIME_DIRECTORY") ?: "/run/systemd/cryptsetup";
 731
 732         arg_disks = hashmap_new(&crypt_device_hash_ops);
 733         if (!arg_disks)
 734                 return log_oom();
 735
 736         r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX);
 737         if (r < 0)
 738                 return log_warning_errno(r, "Failed to parse kernel command line: %m");
 739
 740         if (!arg_enabled)
 741                 return 0;
 742
 743         r = add_crypttab_devices();
 744         if (r < 0)
 745                 return r;
 746
 747         r = add_proc_cmdline_devices();
 748         if (r < 0)
 749                 return r;
 750
 751         return 0;
 752 }
 753
 754 DEFINE_MAIN_GENERATOR_FUNCTION(run);