src/home/homed-home.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #if HAVE_LINUX_MEMFD_H
   4 #include <linux/memfd.h>
   5 #endif
   6
   7 #include <sys/mman.h>
   8 #include <sys/quota.h>
   9 #include <sys/vfs.h>
  10
  11 #include "blockdev-util.h"
  12 #include "btrfs-util.h"
  13 #include "bus-common-errors.h"
  14 #include "data-fd-util.h"
  15 #include "env-util.h"
  16 #include "errno-list.h"
  17 #include "errno-util.h"
  18 #include "fd-util.h"
  19 #include "fileio.h"
  20 #include "filesystems.h"
  21 #include "fs-util.h"
  22 #include "glyph-util.h"
  23 #include "home-util.h"
  24 #include "homed-home-bus.h"
  25 #include "homed-home.h"
  26 #include "missing_magic.h"
  27 #include "missing_syscall.h"
  28 #include "mkdir.h"
  29 #include "path-util.h"
  30 #include "process-util.h"
  31 #include "pwquality-util.h"
  32 #include "quota-util.h"
  33 #include "resize-fs.h"
  34 #include "set.h"
  35 #include "signal-util.h"
  36 #include "stat-util.h"
  37 #include "string-table.h"
  38 #include "strv.h"
  39 #include "uid-alloc-range.h"
  40 #include "user-record-pwquality.h"
  41 #include "user-record-sign.h"
  42 #include "user-record-util.h"
  43 #include "user-record.h"
  44 #include "user-util.h"
  45
  46 /* Retry to deactivate home directories again and again every 15s until it works */
  47 #define RETRY_DEACTIVATE_USEC (15U * USEC_PER_SEC)
  48
  49 #define HOME_USERS_MAX 500
  50 #define PENDING_OPERATIONS_MAX 100
  51
  52 assert_cc(HOME_UID_MIN <= HOME_UID_MAX);
  53 assert_cc(HOME_USERS_MAX <= (HOME_UID_MAX - HOME_UID_MIN + 1));
  54
  55 static int home_start_work(Home *h, const char *verb, UserRecord *hr, UserRecord *secret);
  56
  57 DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(operation_hash_ops, void, trivial_hash_func, trivial_compare_func, Operation, operation_unref);
  58
  59 static int suitable_home_record(UserRecord *hr) {
  60         int r;
  61
  62         assert(hr);
  63
  64         if (!hr->user_name)
  65                 return -EUNATCH;
  66
  67         /* We are a bit more restrictive with what we accept as homed-managed user than what we accept in
  68          * home records in general. Let's enforce the stricter rule here. */
  69         if (!suitable_user_name(hr->user_name))
  70                 return -EINVAL;
  71         if (!uid_is_valid(hr->uid))
  72                 return -EINVAL;
  73
  74         /* Insist we are outside of the dynamic and system range */
  75         if (uid_is_system(hr->uid) || gid_is_system(user_record_gid(hr)) ||
  76             uid_is_dynamic(hr->uid) || gid_is_dynamic(user_record_gid(hr)))
  77                 return -EADDRNOTAVAIL;
  78
  79         /* Insist that GID and UID match */
  80         if (user_record_gid(hr) != (gid_t) hr->uid)
  81                 return -EBADSLT;
  82
  83         /* Similar for the realm */
  84         if (hr->realm) {
  85                 r = suitable_realm(hr->realm);
  86                 if (r < 0)
  87                         return r;
  88                 if (r == 0)
  89                         return -EINVAL;
  90         }
  91
  92         return 0;
  93 }
  94
  95 int home_new(Manager *m, UserRecord *hr, const char *sysfs, Home **ret) {
  96         _cleanup_(home_freep) Home *home = NULL;
  97         _cleanup_free_ char *nm = NULL, *ns = NULL;
  98         int r;
  99
 100         assert(m);
 101         assert(hr);
 102
 103         r = suitable_home_record(hr);
 104         if (r < 0)
 105                 return r;
 106
 107         if (hashmap_contains(m->homes_by_name, hr->user_name))
 108                 return -EBUSY;
 109
 110         if (hashmap_contains(m->homes_by_uid, UID_TO_PTR(hr->uid)))
 111                 return -EBUSY;
 112
 113         if (sysfs && hashmap_contains(m->homes_by_sysfs, sysfs))
 114                 return -EBUSY;
 115
 116         if (hashmap_size(m->homes_by_name) >= HOME_USERS_MAX)
 117                 return -EUSERS;
 118
 119         nm = strdup(hr->user_name);
 120         if (!nm)
 121                 return -ENOMEM;
 122
 123         if (sysfs) {
 124                 ns = strdup(sysfs);
 125                 if (!ns)
 126                         return -ENOMEM;
 127         }
 128
 129         home = new(Home, 1);
 130         if (!home)
 131                 return -ENOMEM;
 132
 133         *home = (Home) {
 134                 .manager = m,
 135                 .user_name = TAKE_PTR(nm),
 136                 .uid = hr->uid,
 137                 .state = _HOME_STATE_INVALID,
 138                 .worker_stdout_fd = -EBADF,
 139                 .sysfs = TAKE_PTR(ns),
 140                 .signed_locally = -1,
 141                 .pin_fd = -EBADF,
 142                 .luks_lock_fd = -EBADF,
 143         };
 144
 145         r = hashmap_put(m->homes_by_name, home->user_name, home);
 146         if (r < 0)
 147                 return r;
 148
 149         r = hashmap_put(m->homes_by_uid, UID_TO_PTR(home->uid), home);
 150         if (r < 0)
 151                 return r;
 152
 153         if (home->sysfs) {
 154                 r = hashmap_put(m->homes_by_sysfs, home->sysfs, home);
 155                 if (r < 0)
 156                         return r;
 157         }
 158
 159         r = user_record_clone(hr, USER_RECORD_LOAD_MASK_SECRET|USER_RECORD_PERMISSIVE, &home->record);
 160         if (r < 0)
 161                 return r;
 162
 163         (void) bus_manager_emit_auto_login_changed(m);
 164         (void) bus_home_emit_change(home);
 165         (void) manager_schedule_rebalance(m, /* immediately= */ false);
 166
 167         if (ret)
 168                 *ret = TAKE_PTR(home);
 169         else
 170                 TAKE_PTR(home);
 171
 172         return 0;
 173 }
 174
 175 Home *home_free(Home *h) {
 176
 177         if (!h)
 178                 return NULL;
 179
 180         if (h->manager) {
 181                 (void) bus_home_emit_remove(h);
 182                 (void) bus_manager_emit_auto_login_changed(h->manager);
 183
 184                 if (h->user_name)
 185                         (void) hashmap_remove_value(h->manager->homes_by_name, h->user_name, h);
 186
 187                 if (uid_is_valid(h->uid))
 188                         (void) hashmap_remove_value(h->manager->homes_by_uid, UID_TO_PTR(h->uid), h);
 189
 190                 if (h->sysfs)
 191                         (void) hashmap_remove_value(h->manager->homes_by_sysfs, h->sysfs, h);
 192
 193                 if (h->worker_pid > 0)
 194                         (void) hashmap_remove_value(h->manager->homes_by_worker_pid, PID_TO_PTR(h->worker_pid), h);
 195
 196                 if (h->manager->gc_focus == h)
 197                         h->manager->gc_focus = NULL;
 198
 199                 (void) manager_schedule_rebalance(h->manager, /* immediately= */ false);
 200         }
 201
 202         user_record_unref(h->record);
 203         user_record_unref(h->secret);
 204
 205         h->worker_event_source = sd_event_source_disable_unref(h->worker_event_source);
 206         safe_close(h->worker_stdout_fd);
 207         free(h->user_name);
 208         free(h->sysfs);
 209
 210         h->ref_event_source_please_suspend = sd_event_source_disable_unref(h->ref_event_source_please_suspend);
 211         h->ref_event_source_dont_suspend = sd_event_source_disable_unref(h->ref_event_source_dont_suspend);
 212
 213         h->pending_operations = ordered_set_free(h->pending_operations);
 214         h->pending_event_source = sd_event_source_disable_unref(h->pending_event_source);
 215         h->deferred_change_event_source = sd_event_source_disable_unref(h->deferred_change_event_source);
 216
 217         h->current_operation = operation_unref(h->current_operation);
 218
 219         safe_close(h->pin_fd);
 220         safe_close(h->luks_lock_fd);
 221
 222         h->retry_deactivate_event_source = sd_event_source_disable_unref(h->retry_deactivate_event_source);
 223
 224         return mfree(h);
 225 }
 226
 227 int home_set_record(Home *h, UserRecord *hr) {
 228         _cleanup_(user_record_unrefp) UserRecord *new_hr = NULL;
 229         Home *other;
 230         int r;
 231
 232         assert(h);
 233         assert(h->user_name);
 234         assert(h->record);
 235         assert(hr);
 236
 237         if (user_record_equal(h->record, hr))
 238                 return 0;
 239
 240         r = suitable_home_record(hr);
 241         if (r < 0)
 242                 return r;
 243
 244         if (!user_record_compatible(h->record, hr))
 245                 return -EREMCHG;
 246
 247         if (!FLAGS_SET(hr->mask, USER_RECORD_REGULAR) ||
 248             FLAGS_SET(hr->mask, USER_RECORD_SECRET))
 249                 return -EINVAL;
 250
 251         if (FLAGS_SET(h->record->mask, USER_RECORD_STATUS)) {
 252                 _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
 253
 254                 /* Hmm, the existing record has status fields? If so, copy them over */
 255
 256                 v = json_variant_ref(hr->json);
 257                 r = json_variant_set_field(&v, "status", json_variant_by_key(h->record->json, "status"));
 258                 if (r < 0)
 259                         return r;
 260
 261                 new_hr = user_record_new();
 262                 if (!new_hr)
 263                         return -ENOMEM;
 264
 265                 r = user_record_load(new_hr, v, USER_RECORD_LOAD_REFUSE_SECRET|USER_RECORD_PERMISSIVE);
 266                 if (r < 0)
 267                         return r;
 268
 269                 hr = new_hr;
 270         }
 271
 272         other = hashmap_get(h->manager->homes_by_uid, UID_TO_PTR(hr->uid));
 273         if (other && other != h)
 274                 return -EBUSY;
 275
 276         if (h->uid != hr->uid) {
 277                 r = hashmap_remove_and_replace(h->manager->homes_by_uid, UID_TO_PTR(h->uid), UID_TO_PTR(hr->uid), h);
 278                 if (r < 0)
 279                         return r;
 280         }
 281
 282         user_record_unref(h->record);
 283         h->record = user_record_ref(hr);
 284         h->uid = h->record->uid;
 285
 286         /* The updated record might have a different autologin setting, trigger a PropertiesChanged event for it */
 287         (void) bus_manager_emit_auto_login_changed(h->manager);
 288         (void) bus_home_emit_change(h);
 289
 290         return 0;
 291 }
 292
 293 int home_save_record(Home *h) {
 294         _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
 295         _cleanup_free_ char *text = NULL;
 296         const char *fn;
 297         int r;
 298
 299         assert(h);
 300
 301         v = json_variant_ref(h->record->json);
 302         r = json_variant_normalize(&v);
 303         if (r < 0)
 304                 log_warning_errno(r, "User record could not be normalized.");
 305
 306         r = json_variant_format(v, JSON_FORMAT_PRETTY|JSON_FORMAT_NEWLINE, &text);
 307         if (r < 0)
 308                 return r;
 309
 310         (void) mkdir("/var/lib/systemd/", 0755);
 311         (void) mkdir(home_record_dir(), 0700);
 312
 313         fn = strjoina(home_record_dir(), "/", h->user_name, ".identity");
 314
 315         r = write_string_file(fn, text, WRITE_STRING_FILE_ATOMIC|WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_MODE_0600|WRITE_STRING_FILE_SYNC);
 316         if (r < 0)
 317                 return r;
 318
 319         return 0;
 320 }
 321
 322 int home_unlink_record(Home *h) {
 323         const char *fn;
 324
 325         assert(h);
 326
 327         fn = strjoina(home_record_dir(), "/", h->user_name, ".identity");
 328         if (unlink(fn) < 0 && errno != ENOENT)
 329                 return -errno;
 330
 331         fn = strjoina("/run/systemd/home/", h->user_name, ".ref");
 332         if (unlink(fn) < 0 && errno != ENOENT)
 333                 return -errno;
 334
 335         return 0;
 336 }
 337
 338 static void home_unpin(Home *h) {
 339         assert(h);
 340
 341         if (h->pin_fd < 0)
 342                 return;
 343
 344         h->pin_fd = safe_close(h->pin_fd);
 345         log_debug("Successfully closed pin fd on home for %s.", h->user_name);
 346 }
 347
 348 static void home_pin(Home *h) {
 349         const char *path;
 350
 351         assert(h);
 352
 353         if (h->pin_fd >= 0) /* Already pinned? */
 354                 return;
 355
 356         path = user_record_home_directory(h->record);
 357         if (!path) {
 358                 log_warning("No home directory path to pin for %s, ignoring.", h->user_name);
 359                 return;
 360         }
 361
 362         h->pin_fd = open(path, O_RDONLY|O_DIRECTORY|O_CLOEXEC);
 363         if (h->pin_fd < 0) {
 364                 log_warning_errno(errno, "Couldn't open home directory '%s' for pinning, ignoring: %m", path);
 365                 return;
 366         }
 367
 368         log_debug("Successfully pinned home directory '%s'.", path);
 369 }
 370
 371 static void home_update_pin_fd(Home *h, HomeState state) {
 372         assert(h);
 373
 374         if (state < 0)
 375                 state = home_get_state(h);
 376
 377         return HOME_STATE_SHALL_PIN(state) ? home_pin(h) : home_unpin(h);
 378 }
 379
 380 static void home_maybe_close_luks_lock_fd(Home *h, HomeState state) {
 381         assert(h);
 382
 383         if (h->luks_lock_fd < 0)
 384                 return;
 385
 386         if (state < 0)
 387                 state = home_get_state(h);
 388
 389         /* Keep the lock as long as the home dir is active or has some operation going */
 390         if (HOME_STATE_IS_EXECUTING_OPERATION(state) || HOME_STATE_IS_ACTIVE(state) || state == HOME_LOCKED)
 391                 return;
 392
 393         h->luks_lock_fd = safe_close(h->luks_lock_fd);
 394         log_debug("Successfully closed LUKS backing file lock for %s.", h->user_name);
 395 }
 396
 397 static void home_maybe_stop_retry_deactivate(Home *h, HomeState state) {
 398         assert(h);
 399
 400         /* Free the deactivation retry event source if we won't need it anymore. Specifically, we'll free the
 401          * event source whenever the home directory is already deactivated (and we thus where successful) or
 402          * if we start executing an operation that indicates that the home directory is going to be used or
 403          * operated on again. Also, if the home is referenced again stop the timer */
 404
 405         if (HOME_STATE_MAY_RETRY_DEACTIVATE(state) &&
 406             !h->ref_event_source_dont_suspend &&
 407             !h->ref_event_source_please_suspend)
 408                 return;
 409
 410         h->retry_deactivate_event_source = sd_event_source_disable_unref(h->retry_deactivate_event_source);
 411 }
 412
 413 static int home_deactivate_internal(Home *h, bool force, sd_bus_error *error);
 414 static void home_start_retry_deactivate(Home *h);
 415
 416 static int home_on_retry_deactivate(sd_event_source *s, uint64_t usec, void *userdata) {
 417         Home *h = ASSERT_PTR(userdata);
 418         HomeState state;
 419
 420         assert(s);
 421
 422         /* 15s after the last attempt to deactivate the home directory passed. Let's try it one more time. */
 423
 424         h->retry_deactivate_event_source = sd_event_source_disable_unref(h->retry_deactivate_event_source);
 425
 426         state = home_get_state(h);
 427         if (!HOME_STATE_MAY_RETRY_DEACTIVATE(state))
 428                 return 0;
 429
 430         if (IN_SET(state, HOME_ACTIVE, HOME_LINGERING)) {
 431                 log_info("Again trying to deactivate home directory.");
 432
 433                 /* If we are not executing any operation, let's start deactivating now. Note that this will
 434                  * restart our timer again, we are gonna be called again if this doesn't work. */
 435                 (void) home_deactivate_internal(h, /* force= */ false, NULL);
 436         } else
 437                 /* if we are executing an operation (specifically, area already running a deactivation
 438                  * operation), then simply reque the timer, so that we retry again. */
 439                 home_start_retry_deactivate(h);
 440
 441         return 0;
 442 }
 443
 444 static void home_start_retry_deactivate(Home *h) {
 445         int r;
 446
 447         assert(h);
 448         assert(h->manager);
 449
 450         /* Already allocated? */
 451         if (h->retry_deactivate_event_source)
 452                 return;
 453
 454         /* If the home directory is being used now don't start the timer */
 455         if (h->ref_event_source_dont_suspend || h->ref_event_source_please_suspend)
 456                 return;
 457
 458         r = sd_event_add_time_relative(
 459                         h->manager->event,
 460                         &h->retry_deactivate_event_source,
 461                         CLOCK_MONOTONIC,
 462                         RETRY_DEACTIVATE_USEC,
 463                         1*USEC_PER_MINUTE,
 464                         home_on_retry_deactivate,
 465                         h);
 466         if (r < 0)
 467                 return (void) log_warning_errno(r, "Failed to install retry-deactivate event source, ignoring: %m");
 468
 469         (void) sd_event_source_set_description(h->retry_deactivate_event_source, "retry-deactivate");
 470 }
 471
 472 static void home_set_state(Home *h, HomeState state) {
 473         HomeState old_state, new_state;
 474
 475         assert(h);
 476
 477         old_state = home_get_state(h);
 478         h->state = state;
 479         new_state = home_get_state(h); /* Query the new state, since the 'state' variable might be set to -1,
 480                                         * in which case we synthesize an high-level state on demand */
 481
 482         log_info("%s: changing state %s %s %s", h->user_name,
 483                  home_state_to_string(old_state),
 484                  special_glyph(SPECIAL_GLYPH_ARROW_RIGHT),
 485                  home_state_to_string(new_state));
 486
 487         home_update_pin_fd(h, new_state);
 488         home_maybe_close_luks_lock_fd(h, new_state);
 489         home_maybe_stop_retry_deactivate(h, new_state);
 490
 491         if (HOME_STATE_IS_EXECUTING_OPERATION(old_state) && !HOME_STATE_IS_EXECUTING_OPERATION(new_state)) {
 492                 /* If we just finished executing some operation, process the queue of pending operations. And
 493                  * enqueue it for GC too. */
 494
 495                 home_schedule_operation(h, NULL, NULL);
 496                 manager_reschedule_rebalance(h->manager);
 497                 manager_enqueue_gc(h->manager, h);
 498         }
 499 }
 500
 501 static int home_parse_worker_stdout(int _fd, UserRecord **ret) {
 502         _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
 503         _cleanup_close_ int fd = _fd; /* take possession, even on failure */
 504         _cleanup_(user_record_unrefp) UserRecord *hr = NULL;
 505         _cleanup_fclose_ FILE *f = NULL;
 506         unsigned line, column;
 507         struct stat st;
 508         int r;
 509
 510         if (fstat(fd, &st) < 0)
 511                 return log_error_errno(errno, "Failed to stat stdout fd: %m");
 512
 513         assert(S_ISREG(st.st_mode));
 514
 515         if (st.st_size == 0) { /* empty record */
 516                 *ret = NULL;
 517                 return 0;
 518         }
 519
 520         if (lseek(fd, SEEK_SET, 0) == (off_t) -1)
 521                 return log_error_errno(errno, "Failed to seek to beginning of memfd: %m");
 522
 523         f = take_fdopen(&fd, "r");
 524         if (!f)
 525                 return log_error_errno(errno, "Failed to reopen memfd: %m");
 526
 527         if (DEBUG_LOGGING) {
 528                 _cleanup_free_ char *text = NULL;
 529
 530                 r = read_full_stream(f, &text, NULL);
 531                 if (r < 0)
 532                         return log_error_errno(r, "Failed to read from client: %m");
 533
 534                 log_debug("Got from worker: %s", text);
 535                 rewind(f);
 536         }
 537
 538         r = json_parse_file(f, "stdout", JSON_PARSE_SENSITIVE, &v, &line, &column);
 539         if (r < 0)
 540                 return log_error_errno(r, "Failed to parse identity at %u:%u: %m", line, column);
 541
 542         hr = user_record_new();
 543         if (!hr)
 544                 return log_oom();
 545
 546         r = user_record_load(hr, v, USER_RECORD_LOAD_REFUSE_SECRET|USER_RECORD_PERMISSIVE);
 547         if (r < 0)
 548                 return log_error_errno(r, "Failed to load home record identity: %m");
 549
 550         *ret = TAKE_PTR(hr);
 551         return 1;
 552 }
 553
 554 static int home_verify_user_record(Home *h, UserRecord *hr, bool *ret_signed_locally, sd_bus_error *ret_error) {
 555         int is_signed;
 556
 557         assert(h);
 558         assert(hr);
 559         assert(ret_signed_locally);
 560
 561         is_signed = manager_verify_user_record(h->manager, hr);
 562         switch (is_signed) {
 563
 564         case USER_RECORD_SIGNED_EXCLUSIVE:
 565                 log_info("Home %s is signed exclusively by our key, accepting.", hr->user_name);
 566                 *ret_signed_locally = true;
 567                 return 0;
 568
 569         case USER_RECORD_SIGNED:
 570                 log_info("Home %s is signed by our key (and others), accepting.", hr->user_name);
 571                 *ret_signed_locally = false;
 572                 return 0;
 573
 574         case USER_RECORD_FOREIGN:
 575                 log_info("Home %s is signed by foreign key we like, accepting.", hr->user_name);
 576                 *ret_signed_locally = false;
 577                 return 0;
 578
 579         case USER_RECORD_UNSIGNED:
 580                 sd_bus_error_setf(ret_error, BUS_ERROR_BAD_SIGNATURE, "User record %s is not signed at all, refusing.", hr->user_name);
 581                 return log_error_errno(SYNTHETIC_ERRNO(EPERM), "Home %s contains user record that is not signed at all, refusing.", hr->user_name);
 582
 583         case -ENOKEY:
 584                 sd_bus_error_setf(ret_error, BUS_ERROR_BAD_SIGNATURE, "User record %s is not signed by any known key, refusing.", hr->user_name);
 585                 return log_error_errno(is_signed, "Home %s contains user record that is not signed by any known key, refusing.", hr->user_name);
 586
 587         default:
 588                 assert(is_signed < 0);
 589                 return log_error_errno(is_signed, "Failed to verify signature on user record for %s, refusing fixation: %m", hr->user_name);
 590         }
 591 }
 592
 593 static int convert_worker_errno(Home *h, int e, sd_bus_error *error) {
 594         /* Converts the error numbers the worker process returned into somewhat sensible dbus errors */
 595
 596         switch (e) {
 597
 598         case -EMSGSIZE:
 599                 return sd_bus_error_set(error, BUS_ERROR_BAD_HOME_SIZE, "File systems of this type cannot be shrunk");
 600         case -ETXTBSY:
 601                 return sd_bus_error_set(error, BUS_ERROR_BAD_HOME_SIZE, "File systems of this type can only be shrunk offline");
 602         case -ERANGE:
 603                 return sd_bus_error_set(error, BUS_ERROR_BAD_HOME_SIZE, "File system size too small");
 604         case -ENOLINK:
 605                 return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "System does not support selected storage backend");
 606         case -EPROTONOSUPPORT:
 607                 return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "System does not support selected file system");
 608         case -ENOTTY:
 609                 return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Operation not supported on storage backend");
 610         case -ESOCKTNOSUPPORT:
 611                 return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Operation not supported on file system");
 612         case -ENOKEY:
 613                 return sd_bus_error_setf(error, BUS_ERROR_BAD_PASSWORD, "Password for home %s is incorrect or not sufficient for authentication.", h->user_name);
 614         case -EBADSLT:
 615                 return sd_bus_error_setf(error, BUS_ERROR_BAD_PASSWORD_AND_NO_TOKEN, "Password for home %s is incorrect or not sufficient, and configured security token not found either.", h->user_name);
 616         case -EREMOTEIO:
 617                 return sd_bus_error_setf(error, BUS_ERROR_BAD_RECOVERY_KEY, "Recovery key for home %s is incorrect or not sufficient for authentication.", h->user_name);
 618         case -ENOANO:
 619                 return sd_bus_error_set(error, BUS_ERROR_TOKEN_PIN_NEEDED, "PIN for security token required.");
 620         case -ERFKILL:
 621                 return sd_bus_error_set(error, BUS_ERROR_TOKEN_PROTECTED_AUTHENTICATION_PATH_NEEDED, "Security token requires protected authentication path.");
 622         case -EMEDIUMTYPE:
 623                 return sd_bus_error_set(error, BUS_ERROR_TOKEN_USER_PRESENCE_NEEDED, "Security token requires presence confirmation.");
 624         case -ENOCSI:
 625                 return sd_bus_error_set(error, BUS_ERROR_TOKEN_USER_VERIFICATION_NEEDED, "Security token requires user verification.");
 626         case -ENOSTR:
 627                 return sd_bus_error_set(error, BUS_ERROR_TOKEN_ACTION_TIMEOUT, "Token action timeout. (User was supposed to verify presence or similar, by interacting with the token, and didn't do that in time.)");
 628         case -EOWNERDEAD:
 629                 return sd_bus_error_set(error, BUS_ERROR_TOKEN_PIN_LOCKED, "PIN of security token locked.");
 630         case -ENOLCK:
 631                 return sd_bus_error_set(error, BUS_ERROR_TOKEN_BAD_PIN, "Bad PIN of security token.");
 632         case -ETOOMANYREFS:
 633                 return sd_bus_error_set(error, BUS_ERROR_TOKEN_BAD_PIN_FEW_TRIES_LEFT, "Bad PIN of security token, and only a few tries left.");
 634         case -EUCLEAN:
 635                 return sd_bus_error_set(error, BUS_ERROR_TOKEN_BAD_PIN_ONE_TRY_LEFT, "Bad PIN of security token, and only one try left.");
 636         case -EBUSY:
 637                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "Home %s is currently being used, or an operation on home %s is currently being executed.", h->user_name, h->user_name);
 638         case -ENOEXEC:
 639                 return sd_bus_error_setf(error, BUS_ERROR_HOME_NOT_ACTIVE, "Home %s is currently not active", h->user_name);
 640         case -ENOSPC:
 641                 return sd_bus_error_setf(error, BUS_ERROR_NO_DISK_SPACE, "Not enough disk space for home %s", h->user_name);
 642         case -EKEYREVOKED:
 643                 return sd_bus_error_setf(error, BUS_ERROR_HOME_CANT_AUTHENTICATE, "Home %s has no password or other authentication mechanism defined.", h->user_name);
 644         case -EADDRINUSE:
 645                 return sd_bus_error_setf(error, BUS_ERROR_HOME_IN_USE, "Home %s is currently being used elsewhere.", h->user_name);
 646         }
 647
 648         return 0;
 649 }
 650
 651 static void home_count_bad_authentication(Home *h, bool save) {
 652         int r;
 653
 654         assert(h);
 655
 656         r = user_record_bad_authentication(h->record);
 657         if (r < 0) {
 658                 log_warning_errno(r, "Failed to increase bad authentication counter, ignoring: %m");
 659                 return;
 660         }
 661
 662         if (save) {
 663                 r = home_save_record(h);
 664                 if (r < 0)
 665                         log_warning_errno(r, "Failed to write home record to disk, ignoring: %m");
 666         }
 667 }
 668
 669 static void home_fixate_finish(Home *h, int ret, UserRecord *hr) {
 670         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 671         _cleanup_(user_record_unrefp) UserRecord *secret = NULL;
 672         bool signed_locally;
 673         int r;
 674
 675         assert(h);
 676         assert(IN_SET(h->state, HOME_FIXATING, HOME_FIXATING_FOR_ACTIVATION, HOME_FIXATING_FOR_ACQUIRE));
 677
 678         secret = TAKE_PTR(h->secret); /* Take possession */
 679
 680         if (ret < 0) {
 681                 if (ret == -ENOKEY)
 682                         (void) home_count_bad_authentication(h, false);
 683
 684                 (void) convert_worker_errno(h, ret, &error);
 685                 r = log_error_errno(ret, "Fixation failed: %m");
 686                 goto fail;
 687         }
 688         if (!hr) {
 689                 r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Did not receive user record from worker process, fixation failed.");
 690                 goto fail;
 691         }
 692
 693         r = home_verify_user_record(h, hr, &signed_locally, &error);
 694         if (r < 0)
 695                 goto fail;
 696
 697         r = home_set_record(h, hr);
 698         if (r < 0) {
 699                 log_error_errno(r, "Failed to update home record: %m");
 700                 goto fail;
 701         }
 702
 703         h->signed_locally = signed_locally;
 704
 705         /* When we finished fixating (and don't follow-up with activation), let's count this as good authentication */
 706         if (h->state == HOME_FIXATING) {
 707                 r = user_record_good_authentication(h->record);
 708                 if (r < 0)
 709                         log_warning_errno(r, "Failed to increase good authentication counter, ignoring: %m");
 710         }
 711
 712         r = home_save_record(h);
 713         if (r < 0)
 714                 log_warning_errno(r, "Failed to write home record to disk, ignoring: %m");
 715
 716         if (IN_SET(h->state, HOME_FIXATING_FOR_ACTIVATION, HOME_FIXATING_FOR_ACQUIRE)) {
 717
 718                 r = home_start_work(h, "activate", h->record, secret);
 719                 if (r < 0) {
 720                         h->current_operation = operation_result_unref(h->current_operation, r, NULL);
 721                         home_set_state(h, _HOME_STATE_INVALID);
 722                 } else
 723                         home_set_state(h, h->state == HOME_FIXATING_FOR_ACTIVATION ? HOME_ACTIVATING : HOME_ACTIVATING_FOR_ACQUIRE);
 724
 725                 return;
 726         }
 727
 728         log_debug("Fixation of %s completed.", h->user_name);
 729
 730         h->current_operation = operation_result_unref(h->current_operation, 0, NULL);
 731
 732         /* Reset the state to "invalid", which makes home_get_state() test if the image exists and returns
 733          * HOME_ABSENT vs. HOME_INACTIVE as necessary. */
 734         home_set_state(h, _HOME_STATE_INVALID);
 735         (void) manager_schedule_rebalance(h->manager, /* immediately= */ false);
 736         return;
 737
 738 fail:
 739         /* If fixation fails, we stay in unfixated state! */
 740         h->current_operation = operation_result_unref(h->current_operation, r, &error);
 741         home_set_state(h, HOME_UNFIXATED);
 742 }
 743
 744 static void home_activate_finish(Home *h, int ret, UserRecord *hr) {
 745         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 746         int r;
 747
 748         assert(h);
 749         assert(IN_SET(h->state, HOME_ACTIVATING, HOME_ACTIVATING_FOR_ACQUIRE));
 750
 751         if (ret < 0) {
 752                 if (ret == -ENOKEY)
 753                         home_count_bad_authentication(h, true);
 754
 755                 (void) convert_worker_errno(h, ret, &error);
 756                 r = log_error_errno(ret, "Activation failed: %m");
 757                 goto finish;
 758         }
 759
 760         if (hr) {
 761                 bool signed_locally;
 762
 763                 r = home_verify_user_record(h, hr, &signed_locally, &error);
 764                 if (r < 0)
 765                         goto finish;
 766
 767                 r = home_set_record(h, hr);
 768                 if (r < 0) {
 769                         log_error_errno(r, "Failed to update home record, ignoring: %m");
 770                         goto finish;
 771                 }
 772
 773                 h->signed_locally = signed_locally;
 774
 775                 r = user_record_good_authentication(h->record);
 776                 if (r < 0)
 777                         log_warning_errno(r, "Failed to increase good authentication counter, ignoring: %m");
 778
 779                 r = home_save_record(h);
 780                 if (r < 0)
 781                         log_warning_errno(r, "Failed to write home record to disk, ignoring: %m");
 782         }
 783
 784         log_debug("Activation of %s completed.", h->user_name);
 785         r = 0;
 786
 787 finish:
 788         h->current_operation = operation_result_unref(h->current_operation, r, &error);
 789         home_set_state(h, _HOME_STATE_INVALID);
 790
 791         if (r >= 0)
 792                 (void) manager_schedule_rebalance(h->manager, /* immediately= */ true);
 793 }
 794
 795 static void home_deactivate_finish(Home *h, int ret, UserRecord *hr) {
 796         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 797         int r;
 798
 799         assert(h);
 800         assert(h->state == HOME_DEACTIVATING);
 801         assert(!hr); /* We don't expect a record on this operation */
 802
 803         if (ret < 0) {
 804                 (void) convert_worker_errno(h, ret, &error);
 805                 r = log_error_errno(ret, "Deactivation of %s failed: %m", h->user_name);
 806                 goto finish;
 807         }
 808
 809         log_debug("Deactivation of %s completed.", h->user_name);
 810         r = 0;
 811
 812 finish:
 813         h->current_operation = operation_result_unref(h->current_operation, r, &error);
 814         home_set_state(h, _HOME_STATE_INVALID);
 815
 816         if (r >= 0)
 817                 (void) manager_schedule_rebalance(h->manager, /* immediately= */ true);
 818 }
 819
 820 static void home_remove_finish(Home *h, int ret, UserRecord *hr) {
 821         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 822         Manager *m;
 823         int r;
 824
 825         assert(h);
 826         assert(h->state == HOME_REMOVING);
 827         assert(!hr); /* We don't expect a record on this operation */
 828
 829         m = h->manager;
 830
 831         if (ret < 0 && ret != -EALREADY) {
 832                 (void) convert_worker_errno(h, ret, &error);
 833                 r = log_error_errno(ret, "Removing %s failed: %m", h->user_name);
 834                 goto fail;
 835         }
 836
 837         /* For a couple of storage types we can't delete the actual data storage when called (such as LUKS on
 838          * partitions like USB sticks, or so). Sometimes these storage locations are among those we normally
 839          * automatically discover in /home or in udev. When such a home is deleted let's hence issue a rescan
 840          * after completion, so that "unfixated" entries are rediscovered.  */
 841         if (!IN_SET(user_record_test_image_path(h->record), USER_TEST_UNDEFINED, USER_TEST_ABSENT))
 842                 manager_enqueue_rescan(m);
 843
 844         /* The image is now removed from disk. Now also remove our stored record */
 845         r = home_unlink_record(h);
 846         if (r < 0) {
 847                 log_error_errno(r, "Removing record file failed: %m");
 848                 goto fail;
 849         }
 850
 851         log_debug("Removal of %s completed.", h->user_name);
 852         h->current_operation = operation_result_unref(h->current_operation, 0, NULL);
 853
 854         /* Unload this record from memory too now. */
 855         h = home_free(h);
 856
 857         (void) manager_schedule_rebalance(m, /* immediately= */ true);
 858         return;
 859
 860 fail:
 861         h->current_operation = operation_result_unref(h->current_operation, r, &error);
 862         home_set_state(h, _HOME_STATE_INVALID);
 863 }
 864
 865 static void home_create_finish(Home *h, int ret, UserRecord *hr) {
 866         int r;
 867
 868         assert(h);
 869         assert(h->state == HOME_CREATING);
 870
 871         if (ret < 0) {
 872                 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 873
 874                 (void) convert_worker_errno(h, ret, &error);
 875                 log_error_errno(ret, "Operation on %s failed: %m", h->user_name);
 876                 h->current_operation = operation_result_unref(h->current_operation, ret, &error);
 877
 878                 if (h->unregister_on_failure) {
 879                         (void) home_unlink_record(h);
 880                         h = home_free(h);
 881                         return;
 882                 }
 883
 884                 home_set_state(h, _HOME_STATE_INVALID);
 885                 return;
 886         }
 887
 888         if (hr) {
 889                 r = home_set_record(h, hr);
 890                 if (r < 0)
 891                         log_warning_errno(r, "Failed to update home record, ignoring: %m");
 892         }
 893
 894         r = home_save_record(h);
 895         if (r < 0)
 896                 log_warning_errno(r, "Failed to save record to disk, ignoring: %m");
 897
 898         log_debug("Creation of %s completed.", h->user_name);
 899
 900         h->current_operation = operation_result_unref(h->current_operation, 0, NULL);
 901         home_set_state(h, _HOME_STATE_INVALID);
 902
 903         (void) manager_schedule_rebalance(h->manager, /* immediately= */ true);
 904 }
 905
 906 static void home_change_finish(Home *h, int ret, UserRecord *hr) {
 907         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 908         int r;
 909
 910         assert(h);
 911
 912         if (ret < 0) {
 913                 if (ret == -ENOKEY)
 914                         (void) home_count_bad_authentication(h, true);
 915
 916                 (void) convert_worker_errno(h, ret, &error);
 917                 r = log_error_errno(ret, "Change operation failed: %m");
 918                 goto finish;
 919         }
 920
 921         if (hr) {
 922                 r = home_set_record(h, hr);
 923                 if (r < 0)
 924                         log_warning_errno(r, "Failed to update home record, ignoring: %m");
 925                 else {
 926                         r = user_record_good_authentication(h->record);
 927                         if (r < 0)
 928                                 log_warning_errno(r, "Failed to increase good authentication counter, ignoring: %m");
 929
 930                         r = home_save_record(h);
 931                         if (r < 0)
 932                                 log_warning_errno(r, "Failed to write home record to disk, ignoring: %m");
 933                 }
 934         }
 935
 936         log_debug("Change operation of %s completed.", h->user_name);
 937         (void) manager_schedule_rebalance(h->manager, /* immediately= */ false);
 938         r = 0;
 939
 940 finish:
 941         h->current_operation = operation_result_unref(h->current_operation, r, &error);
 942         home_set_state(h, _HOME_STATE_INVALID);
 943 }
 944
 945 static void home_locking_finish(Home *h, int ret, UserRecord *hr) {
 946         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 947         int r;
 948
 949         assert(h);
 950         assert(h->state == HOME_LOCKING);
 951
 952         if (ret < 0) {
 953                 (void) convert_worker_errno(h, ret, &error);
 954                 r = log_error_errno(ret, "Locking operation failed: %m");
 955                 goto finish;
 956         }
 957
 958         log_debug("Locking operation of %s completed.", h->user_name);
 959         h->current_operation = operation_result_unref(h->current_operation, 0, NULL);
 960         home_set_state(h, HOME_LOCKED);
 961         return;
 962
 963 finish:
 964         /* If a specific home doesn't know the concept of locking, then that's totally OK, don't propagate
 965          * the error if we are executing a LockAllHomes() operation. */
 966
 967         if (h->current_operation->type == OPERATION_LOCK_ALL && r == -ENOTTY)
 968                 h->current_operation = operation_result_unref(h->current_operation, 0, NULL);
 969         else
 970                 h->current_operation = operation_result_unref(h->current_operation, r, &error);
 971
 972         home_set_state(h, _HOME_STATE_INVALID);
 973 }
 974
 975 static void home_unlocking_finish(Home *h, int ret, UserRecord *hr) {
 976         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 977         int r;
 978
 979         assert(h);
 980         assert(IN_SET(h->state, HOME_UNLOCKING, HOME_UNLOCKING_FOR_ACQUIRE));
 981
 982         if (ret < 0) {
 983                 if (ret == -ENOKEY)
 984                         (void) home_count_bad_authentication(h, true);
 985
 986                 (void) convert_worker_errno(h, ret, &error);
 987                 r = log_error_errno(ret, "Unlocking operation failed: %m");
 988
 989                 /* Revert to locked state */
 990                 home_set_state(h, HOME_LOCKED);
 991                 h->current_operation = operation_result_unref(h->current_operation, r, &error);
 992                 return;
 993         }
 994
 995         r = user_record_good_authentication(h->record);
 996         if (r < 0)
 997                 log_warning_errno(r, "Failed to increase good authentication counter, ignoring: %m");
 998         else {
 999                 r = home_save_record(h);
1000                 if (r < 0)
1001                         log_warning_errno(r, "Failed to write home record to disk, ignoring: %m");
1002         }
1003
1004         log_debug("Unlocking operation of %s completed.", h->user_name);
1005
1006         h->current_operation = operation_result_unref(h->current_operation, r, &error);
1007         home_set_state(h, _HOME_STATE_INVALID);
1008         return;
1009 }
1010
1011 static void home_authenticating_finish(Home *h, int ret, UserRecord *hr) {
1012         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1013         int r;
1014
1015         assert(h);
1016         assert(IN_SET(h->state, HOME_AUTHENTICATING, HOME_AUTHENTICATING_WHILE_ACTIVE, HOME_AUTHENTICATING_FOR_ACQUIRE));
1017
1018         if (ret < 0) {
1019                 if (ret == -ENOKEY)
1020                         (void) home_count_bad_authentication(h, true);
1021
1022                 (void) convert_worker_errno(h, ret, &error);
1023                 r = log_error_errno(ret, "Authentication failed: %m");
1024                 goto finish;
1025         }
1026
1027         if (hr) {
1028                 r = home_set_record(h, hr);
1029                 if (r < 0)
1030                         log_warning_errno(r, "Failed to update home record, ignoring: %m");
1031                 else {
1032                         r = user_record_good_authentication(h->record);
1033                         if (r < 0)
1034                                 log_warning_errno(r, "Failed to increase good authentication counter, ignoring: %m");
1035
1036                         r = home_save_record(h);
1037                         if (r < 0)
1038                                 log_warning_errno(r, "Failed to write home record to disk, ignoring: %m");
1039                 }
1040         }
1041
1042         log_debug("Authentication of %s completed.", h->user_name);
1043         r = 0;
1044
1045 finish:
1046         h->current_operation = operation_result_unref(h->current_operation, r, &error);
1047         home_set_state(h, _HOME_STATE_INVALID);
1048 }
1049
1050 static int home_on_worker_process(sd_event_source *s, const siginfo_t *si, void *userdata) {
1051         _cleanup_(user_record_unrefp) UserRecord *hr = NULL;
1052         Home *h = ASSERT_PTR(userdata);
1053         int ret;
1054
1055         assert(s);
1056         assert(si);
1057
1058         assert(h->worker_pid == si->si_pid);
1059         assert(h->worker_event_source);
1060         assert(h->worker_stdout_fd >= 0);
1061
1062         (void) hashmap_remove_value(h->manager->homes_by_worker_pid, PID_TO_PTR(h->worker_pid), h);
1063
1064         h->worker_pid = 0;
1065         h->worker_event_source = sd_event_source_disable_unref(h->worker_event_source);
1066
1067         if (si->si_code != CLD_EXITED) {
1068                 assert(IN_SET(si->si_code, CLD_KILLED, CLD_DUMPED));
1069                 ret = log_debug_errno(SYNTHETIC_ERRNO(EPROTO), "Worker process died abnormally with signal %s.", signal_to_string(si->si_status));
1070         } else if (si->si_status != EXIT_SUCCESS) {
1071                 /* If we received an error code via sd_notify(), use it */
1072                 if (h->worker_error_code != 0)
1073                         ret = log_debug_errno(h->worker_error_code, "Worker reported error code %s.", errno_to_name(h->worker_error_code));
1074                 else
1075                         ret = log_debug_errno(SYNTHETIC_ERRNO(EPROTO), "Worker exited with exit code %i.", si->si_status);
1076         } else
1077                 ret = home_parse_worker_stdout(TAKE_FD(h->worker_stdout_fd), &hr);
1078
1079         h->worker_stdout_fd = safe_close(h->worker_stdout_fd);
1080
1081         switch (h->state) {
1082
1083         case HOME_FIXATING:
1084         case HOME_FIXATING_FOR_ACTIVATION:
1085         case HOME_FIXATING_FOR_ACQUIRE:
1086                 home_fixate_finish(h, ret, hr);
1087                 break;
1088
1089         case HOME_ACTIVATING:
1090         case HOME_ACTIVATING_FOR_ACQUIRE:
1091                 home_activate_finish(h, ret, hr);
1092                 break;
1093
1094         case HOME_DEACTIVATING:
1095                 home_deactivate_finish(h, ret, hr);
1096                 break;
1097
1098         case HOME_LOCKING:
1099                 home_locking_finish(h, ret, hr);
1100                 break;
1101
1102         case HOME_UNLOCKING:
1103         case HOME_UNLOCKING_FOR_ACQUIRE:
1104                 home_unlocking_finish(h, ret, hr);
1105                 break;
1106
1107         case HOME_CREATING:
1108                 home_create_finish(h, ret, hr);
1109                 break;
1110
1111         case HOME_REMOVING:
1112                 home_remove_finish(h, ret, hr);
1113                 break;
1114
1115         case HOME_UPDATING:
1116         case HOME_UPDATING_WHILE_ACTIVE:
1117         case HOME_RESIZING:
1118         case HOME_RESIZING_WHILE_ACTIVE:
1119         case HOME_PASSWD:
1120         case HOME_PASSWD_WHILE_ACTIVE:
1121                 home_change_finish(h, ret, hr);
1122                 break;
1123
1124         case HOME_AUTHENTICATING:
1125         case HOME_AUTHENTICATING_WHILE_ACTIVE:
1126         case HOME_AUTHENTICATING_FOR_ACQUIRE:
1127                 home_authenticating_finish(h, ret, hr);
1128                 break;
1129
1130         default:
1131                 assert_not_reached();
1132         }
1133
1134         return 0;
1135 }
1136
1137 static int home_start_work(Home *h, const char *verb, UserRecord *hr, UserRecord *secret) {
1138         _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
1139         _cleanup_(erase_and_freep) char *formatted = NULL;
1140         _cleanup_close_ int stdin_fd = -EBADF, stdout_fd = -EBADF;
1141         pid_t pid = 0;
1142         int r;
1143
1144         assert(h);
1145         assert(verb);
1146         assert(hr);
1147
1148         if (h->worker_pid != 0)
1149                 return -EBUSY;
1150
1151         assert(h->worker_stdout_fd < 0);
1152         assert(!h->worker_event_source);
1153
1154         v = json_variant_ref(hr->json);
1155
1156         if (secret) {
1157                 JsonVariant *sub = NULL;
1158
1159                 sub = json_variant_by_key(secret->json, "secret");
1160                 if (!sub)
1161                         return -ENOKEY;
1162
1163                 r = json_variant_set_field(&v, "secret", sub);
1164                 if (r < 0)
1165                         return r;
1166         }
1167
1168         r = json_variant_format(v, 0, &formatted);
1169         if (r < 0)
1170                 return r;
1171
1172         stdin_fd = acquire_data_fd(formatted, strlen(formatted), 0);
1173         if (stdin_fd < 0)
1174                 return stdin_fd;
1175
1176         log_debug("Sending to worker: %s", formatted);
1177
1178         stdout_fd = memfd_create("homework-stdout", MFD_CLOEXEC);
1179         if (stdout_fd < 0)
1180                 return -errno;
1181
1182         r = safe_fork_full("(sd-homework)",
1183                            (int[]) { stdin_fd, stdout_fd }, 2,
1184                            FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_LOG|FORK_REOPEN_LOG, &pid);
1185         if (r < 0)
1186                 return r;
1187         if (r == 0) {
1188                 _cleanup_free_ char *joined = NULL;
1189                 const char *homework, *suffix, *unix_path;
1190
1191                 /* Child */
1192
1193                 suffix = getenv("SYSTEMD_HOME_DEBUG_SUFFIX");
1194                 if (suffix) {
1195                         joined = strjoin("/run/systemd/home/notify.", suffix);
1196                         if (!joined)
1197                                 return log_oom();
1198                         unix_path = joined;
1199                 } else
1200                         unix_path = "/run/systemd/home/notify";
1201
1202                 if (setenv("NOTIFY_SOCKET", unix_path, 1) < 0) {
1203                         log_error_errno(errno, "Failed to set $NOTIFY_SOCKET: %m");
1204                         _exit(EXIT_FAILURE);
1205                 }
1206
1207                 /* If we haven't locked the device yet, ask for a lock to be taken and be passed back to us via sd_notify(). */
1208                 if (setenv("SYSTEMD_LUKS_LOCK", one_zero(h->luks_lock_fd < 0), 1) < 0) {
1209                         log_error_errno(errno, "Failed to set $SYSTEMD_LUKS_LOCK: %m");
1210                         _exit(EXIT_FAILURE);
1211                 }
1212
1213                 if (h->manager->default_storage >= 0)
1214                         if (setenv("SYSTEMD_HOME_DEFAULT_STORAGE", user_storage_to_string(h->manager->default_storage), 1) < 0) {
1215                                 log_error_errno(errno, "Failed to set $SYSTEMD_HOME_DEFAULT_STORAGE: %m");
1216                                 _exit(EXIT_FAILURE);
1217                         }
1218
1219                 if (h->manager->default_file_system_type)
1220                         if (setenv("SYSTEMD_HOME_DEFAULT_FILE_SYSTEM_TYPE", h->manager->default_file_system_type, 1) < 0) {
1221                                 log_error_errno(errno, "Failed to set $SYSTEMD_HOME_DEFAULT_FILE_SYSTEM_TYPE: %m");
1222                                 _exit(EXIT_FAILURE);
1223                         }
1224
1225                 r = setenv_systemd_exec_pid(true);
1226                 if (r < 0)
1227                         log_warning_errno(r, "Failed to update $SYSTEMD_EXEC_PID, ignoring: %m");
1228
1229                 r = rearrange_stdio(TAKE_FD(stdin_fd), TAKE_FD(stdout_fd), STDERR_FILENO); /* fds are invalidated by rearrange_stdio() even on failure */
1230                 if (r < 0) {
1231                         log_error_errno(r, "Failed to rearrange stdin/stdout/stderr: %m");
1232                         _exit(EXIT_FAILURE);
1233                 }
1234
1235
1236                 /* Allow overriding the homework path via an environment variable, to make debugging
1237                  * easier. */
1238                 homework = getenv("SYSTEMD_HOMEWORK_PATH") ?: SYSTEMD_HOMEWORK_PATH;
1239
1240                 execl(homework, homework, verb, NULL);
1241                 log_error_errno(errno, "Failed to invoke %s: %m", homework);
1242                 _exit(EXIT_FAILURE);
1243         }
1244
1245         r = sd_event_add_child(h->manager->event, &h->worker_event_source, pid, WEXITED, home_on_worker_process, h);
1246         if (r < 0)
1247                 return r;
1248
1249         (void) sd_event_source_set_description(h->worker_event_source, "worker");
1250
1251         r = hashmap_put(h->manager->homes_by_worker_pid, PID_TO_PTR(pid), h);
1252         if (r < 0) {
1253                 h->worker_event_source = sd_event_source_disable_unref(h->worker_event_source);
1254                 return r;
1255         }
1256
1257         h->worker_stdout_fd = TAKE_FD(stdout_fd);
1258         h->worker_pid = pid;
1259         h->worker_error_code = 0;
1260
1261         return 0;
1262 }
1263
1264 static int home_ratelimit(Home *h, sd_bus_error *error) {
1265         int r, ret;
1266
1267         assert(h);
1268
1269         ret = user_record_ratelimit(h->record);
1270         if (ret < 0)
1271                 return ret;
1272
1273         if (h->state != HOME_UNFIXATED) {
1274                 r = home_save_record(h);
1275                 if (r < 0)
1276                         log_warning_errno(r, "Failed to save updated record, ignoring: %m");
1277         }
1278
1279         if (ret == 0) {
1280                 usec_t t, n;
1281
1282                 n = now(CLOCK_REALTIME);
1283                 t = user_record_ratelimit_next_try(h->record);
1284
1285                 if (t != USEC_INFINITY && t > n)
1286                         return sd_bus_error_setf(error, BUS_ERROR_AUTHENTICATION_LIMIT_HIT,
1287                                                  "Too many login attempts, please try again in %s!",
1288                                                  FORMAT_TIMESPAN(t - n, USEC_PER_SEC));
1289
1290                 return sd_bus_error_set(error, BUS_ERROR_AUTHENTICATION_LIMIT_HIT, "Too many login attempts, please try again later.");
1291         }
1292
1293         return 0;
1294 }
1295
1296 static int home_fixate_internal(
1297                 Home *h,
1298                 UserRecord *secret,
1299                 HomeState for_state,
1300                 sd_bus_error *error) {
1301
1302         int r;
1303
1304         assert(h);
1305         assert(IN_SET(for_state, HOME_FIXATING, HOME_FIXATING_FOR_ACTIVATION, HOME_FIXATING_FOR_ACQUIRE));
1306
1307         r = home_start_work(h, "inspect", h->record, secret);
1308         if (r < 0)
1309                 return r;
1310
1311         if (IN_SET(for_state, HOME_FIXATING_FOR_ACTIVATION, HOME_FIXATING_FOR_ACQUIRE)) {
1312                 /* Remember the secret data, since we need it for the activation again, later on. */
1313                 user_record_unref(h->secret);
1314                 h->secret = user_record_ref(secret);
1315         }
1316
1317         home_set_state(h, for_state);
1318         return 0;
1319 }
1320
1321 int home_fixate(Home *h, UserRecord *secret, sd_bus_error *error) {
1322         int r;
1323
1324         assert(h);
1325
1326         switch (home_get_state(h)) {
1327         case HOME_ABSENT:
1328                 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1329         case HOME_INACTIVE:
1330         case HOME_DIRTY:
1331         case HOME_ACTIVE:
1332         case HOME_LINGERING:
1333         case HOME_LOCKED:
1334                 return sd_bus_error_setf(error, BUS_ERROR_HOME_ALREADY_FIXATED, "Home %s is already fixated.", h->user_name);
1335         case HOME_UNFIXATED:
1336                 break;
1337         default:
1338                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1339         }
1340
1341         r = home_ratelimit(h, error);
1342         if (r < 0)
1343                 return r;
1344
1345         return home_fixate_internal(h, secret, HOME_FIXATING, error);
1346 }
1347
1348 static int home_activate_internal(Home *h, UserRecord *secret, HomeState for_state, sd_bus_error *error) {
1349         int r;
1350
1351         assert(h);
1352         assert(IN_SET(for_state, HOME_ACTIVATING, HOME_ACTIVATING_FOR_ACQUIRE));
1353
1354         r = home_start_work(h, "activate", h->record, secret);
1355         if (r < 0)
1356                 return r;
1357
1358         home_set_state(h, for_state);
1359         return 0;
1360 }
1361
1362 int home_activate(Home *h, UserRecord *secret, sd_bus_error *error) {
1363         int r;
1364
1365         assert(h);
1366
1367         switch (home_get_state(h)) {
1368         case HOME_UNFIXATED:
1369                 return home_fixate_internal(h, secret, HOME_FIXATING_FOR_ACTIVATION, error);
1370         case HOME_ABSENT:
1371                 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1372         case HOME_ACTIVE:
1373                 return sd_bus_error_setf(error, BUS_ERROR_HOME_ALREADY_ACTIVE, "Home %s is already active.", h->user_name);
1374         case HOME_LINGERING:
1375                 /* If we are lingering, i.e. active but are supposed to be deactivated, then cancel this
1376                  * timer if the user explicitly asks us to be active */
1377                 h->retry_deactivate_event_source = sd_event_source_disable_unref(h->retry_deactivate_event_source);
1378                 return 0;
1379         case HOME_LOCKED:
1380                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1381         case HOME_INACTIVE:
1382         case HOME_DIRTY:
1383                 break;
1384         default:
1385                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1386         }
1387
1388         r = home_ratelimit(h, error);
1389         if (r < 0)
1390                 return r;
1391
1392         return home_activate_internal(h, secret, HOME_ACTIVATING, error);
1393 }
1394
1395 static int home_authenticate_internal(Home *h, UserRecord *secret, HomeState for_state, sd_bus_error *error) {
1396         int r;
1397
1398         assert(h);
1399         assert(IN_SET(for_state, HOME_AUTHENTICATING, HOME_AUTHENTICATING_WHILE_ACTIVE, HOME_AUTHENTICATING_FOR_ACQUIRE));
1400
1401         r = home_start_work(h, "inspect", h->record, secret);
1402         if (r < 0)
1403                 return r;
1404
1405         home_set_state(h, for_state);
1406         return 0;
1407 }
1408
1409 int home_authenticate(Home *h, UserRecord *secret, sd_bus_error *error) {
1410         HomeState state;
1411         int r;
1412
1413         assert(h);
1414
1415         state = home_get_state(h);
1416         switch (state) {
1417         case HOME_ABSENT:
1418                 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1419         case HOME_LOCKED:
1420                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1421         case HOME_UNFIXATED:
1422         case HOME_INACTIVE:
1423         case HOME_DIRTY:
1424         case HOME_ACTIVE:
1425         case HOME_LINGERING:
1426                 break;
1427         default:
1428                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1429         }
1430
1431         r = home_ratelimit(h, error);
1432         if (r < 0)
1433                 return r;
1434
1435         return home_authenticate_internal(h, secret, HOME_STATE_IS_ACTIVE(state) ? HOME_AUTHENTICATING_WHILE_ACTIVE : HOME_AUTHENTICATING, error);
1436 }
1437
1438 static int home_deactivate_internal(Home *h, bool force, sd_bus_error *error) {
1439         int r;
1440
1441         assert(h);
1442
1443         home_unpin(h); /* unpin so that we can deactivate */
1444
1445         r = home_start_work(h, force ? "deactivate-force" : "deactivate", h->record, NULL);
1446         if (r < 0)
1447                 /* Operation failed before it even started, reacquire pin fd, if state still dictates so */
1448                 home_update_pin_fd(h, _HOME_STATE_INVALID);
1449         else {
1450                 home_set_state(h, HOME_DEACTIVATING);
1451                 r = 0;
1452         }
1453
1454         /* Let's start a timer to retry deactivation in 15. We'll stop the timer once we manage to deactivate
1455          * the home directory again, or we start any other operation. */
1456         home_start_retry_deactivate(h);
1457
1458         return r;
1459 }
1460
1461 int home_deactivate(Home *h, bool force, sd_bus_error *error) {
1462         assert(h);
1463
1464         switch (home_get_state(h)) {
1465         case HOME_UNFIXATED:
1466         case HOME_ABSENT:
1467         case HOME_INACTIVE:
1468         case HOME_DIRTY:
1469                 return sd_bus_error_setf(error, BUS_ERROR_HOME_NOT_ACTIVE, "Home %s not active.", h->user_name);
1470         case HOME_LOCKED:
1471                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1472         case HOME_ACTIVE:
1473         case HOME_LINGERING:
1474                 break;
1475         default:
1476                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1477         }
1478
1479         return home_deactivate_internal(h, force, error);
1480 }
1481
1482 int home_create(Home *h, UserRecord *secret, sd_bus_error *error) {
1483         int r;
1484
1485         assert(h);
1486
1487         switch (home_get_state(h)) {
1488         case HOME_INACTIVE: {
1489                 int t;
1490
1491                 if (h->record->storage < 0)
1492                         break; /* if no storage is defined we don't know what precisely to look for, hence
1493                                 * HOME_INACTIVE is OK in that case too. */
1494
1495                 t = user_record_test_image_path(h->record);
1496                 if (IN_SET(t, USER_TEST_MAYBE, USER_TEST_UNDEFINED))
1497                         break; /* And if the image path test isn't conclusive, let's also go on */
1498
1499                 if (IN_SET(t, -EBADF, -ENOTDIR))
1500                         return sd_bus_error_setf(error, BUS_ERROR_HOME_EXISTS, "Selected home image of user %s already exists or has wrong inode type.", h->user_name);
1501
1502                 return sd_bus_error_setf(error, BUS_ERROR_HOME_EXISTS, "Selected home image of user %s already exists.", h->user_name);
1503         }
1504         case HOME_UNFIXATED:
1505         case HOME_DIRTY:
1506                 return sd_bus_error_setf(error, BUS_ERROR_HOME_EXISTS, "Home of user %s already exists.", h->user_name);
1507         case HOME_ABSENT:
1508                 break;
1509         case HOME_ACTIVE:
1510         case HOME_LINGERING:
1511         case HOME_LOCKED:
1512         default:
1513                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "Home %s is currently being used, or an operation on home %s is currently being executed.", h->user_name, h->user_name);
1514         }
1515
1516         if (h->record->enforce_password_policy == false)
1517                 log_debug("Password quality check turned off for account, skipping.");
1518         else {
1519                 r = user_record_quality_check_password(h->record, secret, error);
1520                 if (r < 0)
1521                         return r;
1522         }
1523
1524         r = home_start_work(h, "create", h->record, secret);
1525         if (r < 0)
1526                 return r;
1527
1528         home_set_state(h, HOME_CREATING);
1529         return 0;
1530 }
1531
1532 int home_remove(Home *h, sd_bus_error *error) {
1533         HomeState state;
1534         int r;
1535
1536         assert(h);
1537
1538         state = home_get_state(h);
1539         switch (state) {
1540         case HOME_ABSENT: /* If the home directory is absent, then this is just like unregistering */
1541                 return home_unregister(h, error);
1542         case HOME_LOCKED:
1543                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1544         case HOME_UNFIXATED:
1545         case HOME_INACTIVE:
1546         case HOME_DIRTY:
1547                 break;
1548         case HOME_ACTIVE:
1549         case HOME_LINGERING:
1550         default:
1551                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "Home %s is currently being used, or an operation on home %s is currently being executed.", h->user_name, h->user_name);
1552         }
1553
1554         r = home_start_work(h, "remove", h->record, NULL);
1555         if (r < 0)
1556                 return r;
1557
1558         home_set_state(h, HOME_REMOVING);
1559         return 0;
1560 }
1561
1562 static int user_record_extend_with_binding(UserRecord *hr, UserRecord *with_binding, UserRecordLoadFlags flags, UserRecord **ret) {
1563         _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
1564         _cleanup_(user_record_unrefp) UserRecord *nr = NULL;
1565         JsonVariant *binding;
1566         int r;
1567
1568         assert(hr);
1569         assert(with_binding);
1570         assert(ret);
1571
1572         assert_se(v = json_variant_ref(hr->json));
1573
1574         binding = json_variant_by_key(with_binding->json, "binding");
1575         if (binding) {
1576                 r = json_variant_set_field(&v, "binding", binding);
1577                 if (r < 0)
1578                         return r;
1579         }
1580
1581         nr = user_record_new();
1582         if (!nr)
1583                 return -ENOMEM;
1584
1585         r = user_record_load(nr, v, flags);
1586         if (r < 0)
1587                 return r;
1588
1589         *ret = TAKE_PTR(nr);
1590         return 0;
1591 }
1592
1593 static int home_update_internal(
1594                 Home *h,
1595                 const char *verb,
1596                 UserRecord *hr,
1597                 UserRecord *secret,
1598                 sd_bus_error *error) {
1599
1600         _cleanup_(user_record_unrefp) UserRecord *new_hr = NULL, *saved_secret = NULL, *signed_hr = NULL;
1601         int r, c;
1602
1603         assert(h);
1604         assert(verb);
1605         assert(hr);
1606
1607         if (!user_record_compatible(hr, h->record))
1608                 return sd_bus_error_set(error, BUS_ERROR_HOME_RECORD_MISMATCH, "Updated user record is not compatible with existing one.");
1609         c = user_record_compare_last_change(hr, h->record); /* refuse downgrades */
1610         if (c < 0)
1611                 return sd_bus_error_set(error, BUS_ERROR_HOME_RECORD_DOWNGRADE, "Refusing to update to older home record.");
1612
1613         if (!secret && FLAGS_SET(hr->mask, USER_RECORD_SECRET)) {
1614                 r = user_record_clone(hr, USER_RECORD_EXTRACT_SECRET|USER_RECORD_PERMISSIVE, &saved_secret);
1615                 if (r < 0)
1616                         return r;
1617
1618                 secret = saved_secret;
1619         }
1620
1621         r = manager_verify_user_record(h->manager, hr);
1622         switch (r) {
1623
1624         case USER_RECORD_UNSIGNED:
1625                 if (h->signed_locally <= 0) /* If the existing record is not owned by us, don't accept an
1626                                              * unsigned new record. i.e. only implicitly sign new records
1627                                              * that where previously signed by us too. */
1628                         return sd_bus_error_setf(error, BUS_ERROR_HOME_RECORD_SIGNED, "Home %s is signed and cannot be modified locally.", h->user_name);
1629
1630                 /* The updated record is not signed, then do so now */
1631                 r = manager_sign_user_record(h->manager, hr, &signed_hr, error);
1632                 if (r < 0)
1633                         return r;
1634
1635                 hr = signed_hr;
1636                 break;
1637
1638         case USER_RECORD_SIGNED_EXCLUSIVE:
1639         case USER_RECORD_SIGNED:
1640         case USER_RECORD_FOREIGN:
1641                 /* Has already been signed. Great! */
1642                 break;
1643
1644         case -ENOKEY:
1645         default:
1646                 return r;
1647         }
1648
1649         r = user_record_extend_with_binding(hr, h->record, USER_RECORD_LOAD_MASK_SECRET|USER_RECORD_PERMISSIVE, &new_hr);
1650         if (r < 0)
1651                 return r;
1652
1653         if (c == 0) {
1654                 /* different payload but same lastChangeUSec field? That's not cool! */
1655
1656                 r = user_record_masked_equal(new_hr, h->record, USER_RECORD_REGULAR|USER_RECORD_PRIVILEGED|USER_RECORD_PER_MACHINE);
1657                 if (r < 0)
1658                         return r;
1659                 if (r == 0)
1660                         return sd_bus_error_set(error, BUS_ERROR_HOME_RECORD_MISMATCH, "Home record different but timestamp remained the same, refusing.");
1661         }
1662
1663         r = home_start_work(h, verb, new_hr, secret);
1664         if (r < 0)
1665                 return r;
1666
1667         return 0;
1668 }
1669
1670 int home_update(Home *h, UserRecord *hr, sd_bus_error *error) {
1671         HomeState state;
1672         int r;
1673
1674         assert(h);
1675         assert(hr);
1676
1677         state = home_get_state(h);
1678         switch (state) {
1679         case HOME_UNFIXATED:
1680                 return sd_bus_error_setf(error, BUS_ERROR_HOME_UNFIXATED, "Home %s has not been fixated yet.", h->user_name);
1681         case HOME_ABSENT:
1682                 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1683         case HOME_LOCKED:
1684                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1685         case HOME_INACTIVE:
1686         case HOME_DIRTY:
1687         case HOME_ACTIVE:
1688         case HOME_LINGERING:
1689                 break;
1690         default:
1691                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1692         }
1693
1694         r = home_ratelimit(h, error);
1695         if (r < 0)
1696                 return r;
1697
1698         r = home_update_internal(h, "update", hr, NULL, error);
1699         if (r < 0)
1700                 return r;
1701
1702         home_set_state(h, HOME_STATE_IS_ACTIVE(state) ? HOME_UPDATING_WHILE_ACTIVE : HOME_UPDATING);
1703         return 0;
1704 }
1705
1706 int home_resize(Home *h,
1707                 uint64_t disk_size,
1708                 UserRecord *secret,
1709                 bool automatic,
1710                 sd_bus_error *error) {
1711
1712         _cleanup_(user_record_unrefp) UserRecord *c = NULL;
1713         HomeState state;
1714         int r;
1715
1716         assert(h);
1717
1718         state = home_get_state(h);
1719         switch (state) {
1720         case HOME_UNFIXATED:
1721                 return sd_bus_error_setf(error, BUS_ERROR_HOME_UNFIXATED, "Home %s has not been fixated yet.", h->user_name);
1722         case HOME_ABSENT:
1723                 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1724         case HOME_LOCKED:
1725                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1726         case HOME_INACTIVE:
1727         case HOME_DIRTY:
1728         case HOME_ACTIVE:
1729         case HOME_LINGERING:
1730                 break;
1731         default:
1732                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1733         }
1734
1735         r = home_ratelimit(h, error);
1736         if (r < 0)
1737                 return r;
1738
1739         /* If the user didn't specify any size explicitly and rebalancing is on, then the disk size is
1740          * determined by automatic rebalancing and hence not user configured but determined by us and thus
1741          * applied anyway. */
1742         if (disk_size == UINT64_MAX && h->record->rebalance_weight != REBALANCE_WEIGHT_OFF)
1743                 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Disk size is being determined by automatic disk space rebalancing.");
1744
1745         if (disk_size == UINT64_MAX || disk_size == h->record->disk_size) {
1746                 if (h->record->disk_size == UINT64_MAX)
1747                         return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "No disk size to resize to specified.");
1748
1749                 c = user_record_ref(h->record); /* Shortcut if size is unspecified or matches the record */
1750         } else {
1751                 _cleanup_(user_record_unrefp) UserRecord *signed_c = NULL;
1752
1753                 if (h->signed_locally <= 0) /* Don't allow changing of records not signed only by us */
1754                         return sd_bus_error_setf(error, BUS_ERROR_HOME_RECORD_SIGNED, "Home %s is signed and cannot be modified locally.", h->user_name);
1755
1756                 r = user_record_clone(h->record, USER_RECORD_LOAD_REFUSE_SECRET|USER_RECORD_PERMISSIVE, &c);
1757                 if (r < 0)
1758                         return r;
1759
1760                 r = user_record_set_disk_size(c, disk_size);
1761                 if (r == -ERANGE)
1762                         return sd_bus_error_setf(error, BUS_ERROR_BAD_HOME_SIZE, "Requested size for home %s out of acceptable range.", h->user_name);
1763                 if (r < 0)
1764                         return r;
1765
1766                 /* If user picked an explicit size, then turn off rebalancing, so that we don't undo what user chose */
1767                 r = user_record_set_rebalance_weight(c, REBALANCE_WEIGHT_OFF);
1768                 if (r < 0)
1769                         return r;
1770
1771                 r = user_record_update_last_changed(c, false);
1772                 if (r == -ECHRNG)
1773                         return sd_bus_error_setf(error, BUS_ERROR_HOME_RECORD_MISMATCH, "Record last change time of %s is newer than current time, cannot update.", h->user_name);
1774                 if (r < 0)
1775                         return r;
1776
1777                 r = manager_sign_user_record(h->manager, c, &signed_c, error);
1778                 if (r < 0)
1779                         return r;
1780
1781                 user_record_unref(c);
1782                 c = TAKE_PTR(signed_c);
1783         }
1784
1785         r = home_update_internal(h, automatic ? "resize-auto" : "resize", c, secret, error);
1786         if (r < 0)
1787                 return r;
1788
1789         home_set_state(h, HOME_STATE_IS_ACTIVE(state) ? HOME_RESIZING_WHILE_ACTIVE : HOME_RESIZING);
1790         return 0;
1791 }
1792
1793 static int home_may_change_password(
1794                 Home *h,
1795                 sd_bus_error *error) {
1796
1797         int r;
1798
1799         assert(h);
1800
1801         r = user_record_test_password_change_required(h->record);
1802         if (IN_SET(r, -EKEYREVOKED, -EOWNERDEAD, -EKEYEXPIRED, -ESTALE))
1803                 return 0; /* expired in some form, but changing is allowed */
1804         if (IN_SET(r, -EKEYREJECTED, -EROFS))
1805                 return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Expiration settings of account %s do not allow changing of password.", h->user_name);
1806         if (r < 0)
1807                 return log_error_errno(r, "Failed to test password expiry: %m");
1808
1809         return 0; /* not expired */
1810 }
1811
1812 int home_passwd(Home *h,
1813                 UserRecord *new_secret,
1814                 UserRecord *old_secret,
1815                 sd_bus_error *error) {
1816
1817         _cleanup_(user_record_unrefp) UserRecord *c = NULL, *merged_secret = NULL, *signed_c = NULL;
1818         HomeState state;
1819         int r;
1820
1821         assert(h);
1822
1823         if (h->signed_locally <= 0) /* Don't allow changing of records not signed only by us */
1824                 return sd_bus_error_setf(error, BUS_ERROR_HOME_RECORD_SIGNED, "Home %s is signed and cannot be modified locally.", h->user_name);
1825
1826         state = home_get_state(h);
1827         switch (state) {
1828         case HOME_UNFIXATED:
1829                 return sd_bus_error_setf(error, BUS_ERROR_HOME_UNFIXATED, "Home %s has not been fixated yet.", h->user_name);
1830         case HOME_ABSENT:
1831                 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1832         case HOME_LOCKED:
1833                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1834         case HOME_INACTIVE:
1835         case HOME_DIRTY:
1836         case HOME_ACTIVE:
1837         case HOME_LINGERING:
1838                 break;
1839         default:
1840                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1841         }
1842
1843         r = home_ratelimit(h, error);
1844         if (r < 0)
1845                 return r;
1846
1847         r = home_may_change_password(h, error);
1848         if (r < 0)
1849                 return r;
1850
1851         r = user_record_clone(h->record, USER_RECORD_LOAD_REFUSE_SECRET|USER_RECORD_PERMISSIVE, &c);
1852         if (r < 0)
1853                 return r;
1854
1855         merged_secret = user_record_new();
1856         if (!merged_secret)
1857                 return -ENOMEM;
1858
1859         r = user_record_merge_secret(merged_secret, old_secret);
1860         if (r < 0)
1861                 return r;
1862
1863         r = user_record_merge_secret(merged_secret, new_secret);
1864         if (r < 0)
1865                 return r;
1866
1867         if (!strv_isempty(new_secret->password)) {
1868                 /* Update the password only if one is specified, otherwise let's just reuse the old password
1869                  * data. This is useful as a way to propagate updated user records into the LUKS backends
1870                  * properly. */
1871
1872                 r = user_record_make_hashed_password(c, new_secret->password, /* extend = */ false);
1873                 if (r < 0)
1874                         return r;
1875
1876                 r = user_record_set_password_change_now(c, -1 /* remove */);
1877                 if (r < 0)
1878                         return r;
1879         }
1880
1881         r = user_record_update_last_changed(c, true);
1882         if (r == -ECHRNG)
1883                 return sd_bus_error_setf(error, BUS_ERROR_HOME_RECORD_MISMATCH, "Record last change time of %s is newer than current time, cannot update.", h->user_name);
1884         if (r < 0)
1885                 return r;
1886
1887         r = manager_sign_user_record(h->manager, c, &signed_c, error);
1888         if (r < 0)
1889                 return r;
1890
1891         if (c->enforce_password_policy == false)
1892                 log_debug("Password quality check turned off for account, skipping.");
1893         else {
1894                 r = user_record_quality_check_password(c, merged_secret, error);
1895                 if (r < 0)
1896                         return r;
1897         }
1898
1899         r = home_update_internal(h, "passwd", signed_c, merged_secret, error);
1900         if (r < 0)
1901                 return r;
1902
1903         home_set_state(h, HOME_STATE_IS_ACTIVE(state) ? HOME_PASSWD_WHILE_ACTIVE : HOME_PASSWD);
1904         return 0;
1905 }
1906
1907 int home_unregister(Home *h, sd_bus_error *error) {
1908         int r;
1909
1910         assert(h);
1911
1912         switch (home_get_state(h)) {
1913         case HOME_UNFIXATED:
1914                 return sd_bus_error_setf(error, BUS_ERROR_HOME_UNFIXATED, "Home %s is not registered.", h->user_name);
1915         case HOME_LOCKED:
1916                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1917         case HOME_ABSENT:
1918         case HOME_INACTIVE:
1919         case HOME_DIRTY:
1920                 break;
1921         case HOME_ACTIVE:
1922         case HOME_LINGERING:
1923         default:
1924                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "Home %s is currently being used, or an operation on home %s is currently being executed.", h->user_name, h->user_name);
1925         }
1926
1927         r = home_unlink_record(h);
1928         if (r < 0)
1929                 return r;
1930
1931         /* And destroy the whole entry. The caller needs to be prepared for that. */
1932         h = home_free(h);
1933         return 1;
1934 }
1935
1936 int home_lock(Home *h, sd_bus_error *error) {
1937         int r;
1938
1939         assert(h);
1940
1941         switch (home_get_state(h)) {
1942         case HOME_UNFIXATED:
1943         case HOME_ABSENT:
1944         case HOME_INACTIVE:
1945         case HOME_DIRTY:
1946                 return sd_bus_error_setf(error, BUS_ERROR_HOME_NOT_ACTIVE, "Home %s is not active.", h->user_name);
1947         case HOME_LOCKED:
1948                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is already locked.", h->user_name);
1949         case HOME_ACTIVE:
1950         case HOME_LINGERING:
1951                 break;
1952         default:
1953                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1954         }
1955
1956         r = home_start_work(h, "lock", h->record, NULL);
1957         if (r < 0)
1958                 return r;
1959
1960         home_set_state(h, HOME_LOCKING);
1961         return 0;
1962 }
1963
1964 static int home_unlock_internal(Home *h, UserRecord *secret, HomeState for_state, sd_bus_error *error) {
1965         int r;
1966
1967         assert(h);
1968         assert(IN_SET(for_state, HOME_UNLOCKING, HOME_UNLOCKING_FOR_ACQUIRE));
1969
1970         r = home_start_work(h, "unlock", h->record, secret);
1971         if (r < 0)
1972                 return r;
1973
1974         home_set_state(h, for_state);
1975         return 0;
1976 }
1977
1978 int home_unlock(Home *h, UserRecord *secret, sd_bus_error *error) {
1979         int r;
1980         assert(h);
1981
1982         r = home_ratelimit(h, error);
1983         if (r < 0)
1984                 return r;
1985
1986         switch (home_get_state(h)) {
1987         case HOME_UNFIXATED:
1988         case HOME_ABSENT:
1989         case HOME_INACTIVE:
1990         case HOME_ACTIVE:
1991         case HOME_LINGERING:
1992         case HOME_DIRTY:
1993                 return sd_bus_error_setf(error, BUS_ERROR_HOME_NOT_LOCKED, "Home %s is not locked.", h->user_name);
1994         case HOME_LOCKED:
1995                 break;
1996         default:
1997                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1998         }
1999
2000         return home_unlock_internal(h, secret, HOME_UNLOCKING, error);
2001 }
2002
2003 HomeState home_get_state(Home *h) {
2004         int r;
2005         assert(h);
2006
2007         /* When the state field is initialized, it counts. */
2008         if (h->state >= 0)
2009                 return h->state;
2010
2011         /* Otherwise, let's see if the home directory is mounted. If so, we assume for sure the home
2012          * directory is active */
2013         if (user_record_test_home_directory(h->record) == USER_TEST_MOUNTED)
2014                 return h->retry_deactivate_event_source ? HOME_LINGERING : HOME_ACTIVE;
2015
2016         /* And if we see the image being gone, we report this as absent */
2017         r = user_record_test_image_path(h->record);
2018         if (r == USER_TEST_ABSENT)
2019                 return HOME_ABSENT;
2020         if (r == USER_TEST_DIRTY)
2021                 return HOME_DIRTY;
2022
2023         /* And for all other cases we return "inactive". */
2024         return HOME_INACTIVE;
2025 }
2026
2027 void home_process_notify(Home *h, char **l, int fd) {
2028         _cleanup_close_ int taken_fd = TAKE_FD(fd);
2029         const char *e;
2030         int error;
2031         int r;
2032
2033         assert(h);
2034
2035         e = strv_env_get(l, "SYSTEMD_LUKS_LOCK_FD");
2036         if (e) {
2037                 r = parse_boolean(e);
2038                 if (r < 0)
2039                         return (void) log_debug_errno(r, "Failed to parse SYSTEMD_LUKS_LOCK_FD value: %m");
2040                 if (r > 0) {
2041                         if (taken_fd < 0)
2042                                 return (void) log_debug("Got notify message with SYSTEMD_LUKS_LOCK_FD=1 but no fd passed, ignoring: %m");
2043
2044                         close_and_replace(h->luks_lock_fd, taken_fd);
2045
2046                         log_debug("Successfully acquired LUKS lock fd from worker.");
2047
2048                         /* Immediately check if we actually want to keep it */
2049                         home_maybe_close_luks_lock_fd(h, _HOME_STATE_INVALID);
2050                 } else {
2051                         if (taken_fd >= 0)
2052                                 return (void) log_debug("Got notify message with SYSTEMD_LUKS_LOCK_FD=0 but fd passed, ignoring: %m");
2053
2054                         h->luks_lock_fd = safe_close(h->luks_lock_fd);
2055                 }
2056
2057                 return;
2058         }
2059
2060         e = strv_env_get(l, "ERRNO");
2061         if (!e)
2062                 return (void) log_debug("Got notify message lacking both ERRNO= and SYSTEMD_LUKS_LOCK_FD= field, ignoring.");
2063
2064         r = safe_atoi(e, &error);
2065         if (r < 0)
2066                 return (void) log_debug_errno(r, "Failed to parse received error number, ignoring: %s", e);
2067         if (error <= 0)
2068                 return (void) log_debug("Error number is out of range: %i", error);
2069
2070         h->worker_error_code = error;
2071 }
2072
2073 int home_killall(Home *h) {
2074         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2075         _cleanup_free_ char *unit = NULL;
2076         int r;
2077
2078         assert(h);
2079
2080         if (!uid_is_valid(h->uid))
2081                 return 0;
2082
2083         assert(h->uid > 0); /* We never should be UID 0 */
2084
2085         /* Let's kill everything matching the specified UID */
2086         r = safe_fork("(sd-killer)",
2087                       FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_WAIT|FORK_LOG|FORK_REOPEN_LOG,
2088                       NULL);
2089         if (r < 0)
2090                 return r;
2091         if (r == 0) {
2092                 gid_t gid;
2093
2094                 /* Child */
2095
2096                 gid = user_record_gid(h->record);
2097                 if (setresgid(gid, gid, gid) < 0) {
2098                         log_error_errno(errno, "Failed to change GID to " GID_FMT ": %m", gid);
2099                         _exit(EXIT_FAILURE);
2100                 }
2101
2102                 if (setgroups(0, NULL) < 0) {
2103                         log_error_errno(errno, "Failed to reset auxiliary groups list: %m");
2104                         _exit(EXIT_FAILURE);
2105                 }
2106
2107                 if (setresuid(h->uid, h->uid, h->uid) < 0) {
2108                         log_error_errno(errno, "Failed to change UID to " UID_FMT ": %m", h->uid);
2109                         _exit(EXIT_FAILURE);
2110                 }
2111
2112                 if (kill(-1, SIGKILL) < 0) {
2113                         log_error_errno(errno, "Failed to kill all processes of UID " UID_FMT ": %m", h->uid);
2114                         _exit(EXIT_FAILURE);
2115                 }
2116
2117                 _exit(EXIT_SUCCESS);
2118         }
2119
2120         /* Let's also kill everything in the user's slice */
2121         if (asprintf(&unit, "user-" UID_FMT ".slice", h->uid) < 0)
2122                 return log_oom();
2123
2124         r = sd_bus_call_method(
2125                         h->manager->bus,
2126                         "org.freedesktop.systemd1",
2127                         "/org/freedesktop/systemd1",
2128                         "org.freedesktop.systemd1.Manager",
2129                         "KillUnit",
2130                         &error,
2131                         NULL,
2132                         "ssi", unit, "all", SIGKILL);
2133         if (r < 0)
2134                 log_full_errno(sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ? LOG_DEBUG : LOG_WARNING,
2135                                r, "Failed to kill login processes of user, ignoring: %s", bus_error_message(&error, r));
2136
2137         return 1;
2138 }
2139
2140 static int home_get_disk_status_luks(
2141                 Home *h,
2142                 HomeState state,
2143                 uint64_t *ret_disk_size,
2144                 uint64_t *ret_disk_usage,
2145                 uint64_t *ret_disk_free,
2146                 uint64_t *ret_disk_ceiling,
2147                 uint64_t *ret_disk_floor,
2148                 statfs_f_type_t *ret_fstype,
2149                 mode_t *ret_access_mode) {
2150
2151         uint64_t disk_size = UINT64_MAX, disk_usage = UINT64_MAX, disk_free = UINT64_MAX,
2152                 disk_ceiling = UINT64_MAX, disk_floor = UINT64_MAX,
2153                 stat_used = UINT64_MAX, fs_size = UINT64_MAX, header_size = 0;
2154         mode_t access_mode = MODE_INVALID;
2155         statfs_f_type_t fstype = 0;
2156         struct statfs sfs;
2157         struct stat st;
2158         const char *hd;
2159         int r;
2160
2161         assert(h);
2162
2163         if (state != HOME_ABSENT) {
2164                 const char *ip;
2165
2166                 ip = user_record_image_path(h->record);
2167                 if (ip) {
2168                         if (stat(ip, &st) < 0)
2169                                 log_debug_errno(errno, "Failed to stat() %s, ignoring: %m", ip);
2170                         else if (S_ISREG(st.st_mode)) {
2171                                 _cleanup_free_ char *parent = NULL;
2172
2173                                 disk_size = st.st_size;
2174                                 stat_used = st.st_blocks * 512;
2175
2176                                 r = path_extract_directory(ip, &parent);
2177                                 if (r < 0)
2178                                         return log_error_errno(r, "Failed to extract parent directory from image path '%s': %m", ip);
2179
2180                                 if (statfs(parent, &sfs) < 0)
2181                                         log_debug_errno(errno, "Failed to statfs() %s, ignoring: %m", parent);
2182                                 else
2183                                         disk_ceiling = stat_used + sfs.f_bsize * sfs.f_bavail;
2184
2185                         } else if (S_ISBLK(st.st_mode)) {
2186                                 _cleanup_free_ char *szbuf = NULL;
2187                                 char p[SYS_BLOCK_PATH_MAX("/size")];
2188
2189                                 /* Let's read the size off sysfs, so that we don't have to open the device */
2190                                 xsprintf_sys_block_path(p, "/size", st.st_rdev);
2191                                 r = read_one_line_file(p, &szbuf);
2192                                 if (r < 0)
2193                                         log_debug_errno(r, "Failed to read %s, ignoring: %m", p);
2194                                 else {
2195                                         uint64_t sz;
2196
2197                                         r = safe_atou64(szbuf, &sz);
2198                                         if (r < 0)
2199                                                 log_debug_errno(r, "Failed to parse %s, ignoring: %s", p, szbuf);
2200                                         else
2201                                                 disk_size = sz * 512;
2202                                 }
2203                         } else
2204                                 log_debug("Image path is not a block device or regular file, not able to acquire size.");
2205                 }
2206         }
2207
2208         if (!HOME_STATE_IS_ACTIVE(state))
2209                 goto finish;
2210
2211         hd = user_record_home_directory(h->record);
2212         if (!hd)
2213                 goto finish;
2214
2215         if (stat(hd, &st) < 0) {
2216                 log_debug_errno(errno, "Failed to stat() %s, ignoring: %m", hd);
2217                 goto finish;
2218         }
2219
2220         r = stat_verify_directory(&st);
2221         if (r < 0) {
2222                 log_debug_errno(r, "Home directory %s is not a directory, ignoring: %m", hd);
2223                 goto finish;
2224         }
2225
2226         access_mode = st.st_mode & 07777;
2227
2228         if (statfs(hd, &sfs) < 0) {
2229                 log_debug_errno(errno, "Failed to statfs() %s, ignoring: %m", hd);
2230                 goto finish;
2231         }
2232
2233         fstype = sfs.f_type;
2234
2235         disk_free = sfs.f_bsize * sfs.f_bavail;
2236         fs_size = sfs.f_bsize * sfs.f_blocks;
2237         if (disk_size != UINT64_MAX && disk_size > fs_size)
2238                 header_size = disk_size - fs_size;
2239
2240         /* We take a perspective from the user here (as opposed to from the host): the used disk space is the
2241          * difference from the limit and what's free. This makes a difference if sparse mode is not used: in
2242          * that case the image is pre-allocated and thus appears all used from the host PoV but is not used
2243          * up at all yet from the user's PoV.
2244          *
2245          * That said, we use use the stat() reported loopback file size as upper boundary: our footprint can
2246          * never be larger than what we take up on the lowest layers. */
2247
2248         if (disk_size != UINT64_MAX && disk_size > disk_free) {
2249                 disk_usage = disk_size - disk_free;
2250
2251                 if (stat_used != UINT64_MAX && disk_usage > stat_used)
2252                         disk_usage = stat_used;
2253         } else
2254                 disk_usage = stat_used;
2255
2256         /* If we have the magic, determine floor preferably by magic */
2257         disk_floor = minimal_size_by_fs_magic(sfs.f_type) + header_size;
2258
2259 finish:
2260         /* If we don't know the magic, go by file system name */
2261         if (disk_floor == UINT64_MAX)
2262                 disk_floor = minimal_size_by_fs_name(user_record_file_system_type(h->record));
2263
2264         if (ret_disk_size)
2265                 *ret_disk_size = disk_size;
2266         if (ret_disk_usage)
2267                 *ret_disk_usage = disk_usage;
2268         if (ret_disk_free)
2269                 *ret_disk_free = disk_free;
2270         if (ret_disk_ceiling)
2271                 *ret_disk_ceiling = disk_ceiling;
2272         if (ret_disk_floor)
2273                 *ret_disk_floor = disk_floor;
2274         if (ret_fstype)
2275                 *ret_fstype = fstype;
2276         if (ret_access_mode)
2277                 *ret_access_mode = access_mode;
2278
2279         return 0;
2280 }
2281
2282 static int home_get_disk_status_directory(
2283                 Home *h,
2284                 HomeState state,
2285                 uint64_t *ret_disk_size,
2286                 uint64_t *ret_disk_usage,
2287                 uint64_t *ret_disk_free,
2288                 uint64_t *ret_disk_ceiling,
2289                 uint64_t *ret_disk_floor,
2290                 statfs_f_type_t *ret_fstype,
2291                 mode_t *ret_access_mode) {
2292
2293         uint64_t disk_size = UINT64_MAX, disk_usage = UINT64_MAX, disk_free = UINT64_MAX,
2294                 disk_ceiling = UINT64_MAX, disk_floor = UINT64_MAX;
2295         mode_t access_mode = MODE_INVALID;
2296         statfs_f_type_t fstype = 0;
2297         struct statfs sfs;
2298         struct dqblk req;
2299         const char *path = NULL;
2300         int r;
2301
2302         assert(h);
2303
2304         if (HOME_STATE_IS_ACTIVE(state))
2305                 path = user_record_home_directory(h->record);
2306
2307         if (!path) {
2308                 if (state == HOME_ABSENT)
2309                         goto finish;
2310
2311                 path = user_record_image_path(h->record);
2312         }
2313
2314         if (!path)
2315                 goto finish;
2316
2317         if (statfs(path, &sfs) < 0)
2318                 log_debug_errno(errno, "Failed to statfs() %s, ignoring: %m", path);
2319         else {
2320                 disk_free = sfs.f_bsize * sfs.f_bavail;
2321                 disk_size = sfs.f_bsize * sfs.f_blocks;
2322
2323                 /* We don't initialize disk_usage from statfs() data here, since the device is likely not used
2324                  * by us alone, and disk_usage should only reflect our own use. */
2325
2326                 fstype = sfs.f_type;
2327         }
2328
2329         if (IN_SET(h->record->storage, USER_CLASSIC, USER_DIRECTORY, USER_SUBVOLUME)) {
2330
2331                 r = btrfs_is_subvol(path);
2332                 if (r < 0)
2333                         log_debug_errno(r, "Failed to determine whether %s is a btrfs subvolume: %m", path);
2334                 else if (r > 0) {
2335                         BtrfsQuotaInfo qi;
2336
2337                         r = btrfs_subvol_get_subtree_quota(path, 0, &qi);
2338                         if (r < 0)
2339                                 log_debug_errno(r, "Failed to query btrfs subtree quota, ignoring: %m");
2340                         else {
2341                                 disk_usage = qi.referenced;
2342
2343                                 if (disk_free != UINT64_MAX) {
2344                                         disk_ceiling = qi.referenced + disk_free;
2345
2346                                         if (disk_size != UINT64_MAX && disk_ceiling > disk_size)
2347                                                 disk_ceiling = disk_size;
2348                                 }
2349
2350                                 if (qi.referenced_max != UINT64_MAX) {
2351                                         if (disk_size != UINT64_MAX)
2352                                                 disk_size = MIN(qi.referenced_max, disk_size);
2353                                         else
2354                                                 disk_size = qi.referenced_max;
2355                                 }
2356
2357                                 if (disk_size != UINT64_MAX) {
2358                                         if (disk_size > disk_usage)
2359                                                 disk_free = disk_size - disk_usage;
2360                                         else
2361                                                 disk_free = 0;
2362                                 }
2363                         }
2364
2365                         goto finish;
2366                 }
2367         }
2368
2369         if (IN_SET(h->record->storage, USER_CLASSIC, USER_DIRECTORY, USER_FSCRYPT)) {
2370                 r = quotactl_path(QCMD_FIXED(Q_GETQUOTA, USRQUOTA), path, h->uid, &req);
2371                 if (r < 0) {
2372                         if (ERRNO_IS_NOT_SUPPORTED(r)) {
2373                                 log_debug_errno(r, "No UID quota support on %s.", path);
2374                                 goto finish;
2375                         }
2376
2377                         if (r != -ESRCH) {
2378                                 log_debug_errno(r, "Failed to query disk quota for UID " UID_FMT ": %m", h->uid);
2379                                 goto finish;
2380                         }
2381
2382                         disk_usage = 0; /* No record of this user? then nothing was used */
2383                 } else {
2384                         if (FLAGS_SET(req.dqb_valid, QIF_SPACE) && disk_free != UINT64_MAX) {
2385                                 disk_ceiling = req.dqb_curspace + disk_free;
2386
2387                                 if (disk_size != UINT64_MAX && disk_ceiling > disk_size)
2388                                         disk_ceiling = disk_size;
2389                         }
2390
2391                         if (FLAGS_SET(req.dqb_valid, QIF_BLIMITS)) {
2392                                 uint64_t q;
2393
2394                                 /* Take the minimum of the quota and the available disk space here */
2395                                 q = req.dqb_bhardlimit * QIF_DQBLKSIZE;
2396                                 if (disk_size != UINT64_MAX)
2397                                         disk_size = MIN(disk_size, q);
2398                                 else
2399                                         disk_size = q;
2400                         }
2401                         if (FLAGS_SET(req.dqb_valid, QIF_SPACE)) {
2402                                 disk_usage = req.dqb_curspace;
2403
2404                                 if (disk_size != UINT64_MAX) {
2405                                         if (disk_size > disk_usage)
2406                                                 disk_free = disk_size - disk_usage;
2407                                         else
2408                                                 disk_free = 0;
2409                                 }
2410                         }
2411                 }
2412         }
2413
2414 finish:
2415         if (ret_disk_size)
2416                 *ret_disk_size = disk_size;
2417         if (ret_disk_usage)
2418                 *ret_disk_usage = disk_usage;
2419         if (ret_disk_free)
2420                 *ret_disk_free = disk_free;
2421         if (ret_disk_ceiling)
2422                 *ret_disk_ceiling = disk_ceiling;
2423         if (ret_disk_floor)
2424                 *ret_disk_floor = disk_floor;
2425         if (ret_fstype)
2426                 *ret_fstype = fstype;
2427         if (ret_access_mode)
2428                 *ret_access_mode = access_mode;
2429
2430         return 0;
2431 }
2432
2433 static int home_get_disk_status_internal(
2434                 Home *h,
2435                 HomeState state,
2436                 uint64_t *ret_disk_size,
2437                 uint64_t *ret_disk_usage,
2438                 uint64_t *ret_disk_free,
2439                 uint64_t *ret_disk_ceiling,
2440                 uint64_t *ret_disk_floor,
2441                 statfs_f_type_t *ret_fstype,
2442                 mode_t *ret_access_mode) {
2443
2444         assert(h);
2445         assert(h->record);
2446
2447         switch (h->record->storage) {
2448
2449         case USER_LUKS:
2450                 return home_get_disk_status_luks(h, state, ret_disk_size, ret_disk_usage, ret_disk_free, ret_disk_ceiling, ret_disk_floor, ret_fstype, ret_access_mode);
2451
2452         case USER_CLASSIC:
2453         case USER_DIRECTORY:
2454         case USER_SUBVOLUME:
2455         case USER_FSCRYPT:
2456         case USER_CIFS:
2457                 return home_get_disk_status_directory(h, state, ret_disk_size, ret_disk_usage, ret_disk_free, ret_disk_ceiling, ret_disk_floor, ret_fstype, ret_access_mode);
2458
2459         default:
2460                 /* don't know */
2461
2462                 if (ret_disk_size)
2463                         *ret_disk_size = UINT64_MAX;
2464                 if (ret_disk_usage)
2465                         *ret_disk_usage = UINT64_MAX;
2466                 if (ret_disk_free)
2467                         *ret_disk_free = UINT64_MAX;
2468                 if (ret_disk_ceiling)
2469                         *ret_disk_ceiling = UINT64_MAX;
2470                 if (ret_disk_floor)
2471                         *ret_disk_floor = UINT64_MAX;
2472                 if (ret_fstype)
2473                         *ret_fstype = 0;
2474                 if (ret_access_mode)
2475                         *ret_access_mode = MODE_INVALID;
2476
2477                 return 0;
2478         }
2479 }
2480
2481 int home_get_disk_status(
2482                 Home *h,
2483                 uint64_t *ret_disk_size,
2484                 uint64_t *ret_disk_usage,
2485                 uint64_t *ret_disk_free,
2486                 uint64_t *ret_disk_ceiling,
2487                 uint64_t *ret_disk_floor,
2488                 statfs_f_type_t *ret_fstype,
2489                 mode_t *ret_access_mode) {
2490
2491         assert(h);
2492
2493         return home_get_disk_status_internal(
2494                         h,
2495                         home_get_state(h),
2496                         ret_disk_size,
2497                         ret_disk_usage,
2498                         ret_disk_free,
2499                         ret_disk_ceiling,
2500                         ret_disk_floor,
2501                         ret_fstype,
2502                         ret_access_mode);
2503 }
2504
2505 int home_augment_status(
2506                 Home *h,
2507                 UserRecordLoadFlags flags,
2508                 UserRecord **ret) {
2509
2510         uint64_t disk_size = UINT64_MAX, disk_usage = UINT64_MAX, disk_free = UINT64_MAX, disk_ceiling = UINT64_MAX, disk_floor = UINT64_MAX;
2511         _cleanup_(json_variant_unrefp) JsonVariant *j = NULL, *v = NULL, *m = NULL, *status = NULL;
2512         _cleanup_(user_record_unrefp) UserRecord *ur = NULL;
2513         statfs_f_type_t magic;
2514         const char *fstype;
2515         mode_t access_mode;
2516         HomeState state;
2517         sd_id128_t id;
2518         int r;
2519
2520         assert(h);
2521         assert(ret);
2522
2523         /* We are supposed to add this, this can't be on hence. */
2524         assert(!FLAGS_SET(flags, USER_RECORD_STRIP_STATUS));
2525
2526         r = sd_id128_get_machine(&id);
2527         if (r < 0)
2528                 return r;
2529
2530         state = home_get_state(h);
2531
2532         r = home_get_disk_status_internal(
2533                         h, state,
2534                         &disk_size,
2535                         &disk_usage,
2536                         &disk_free,
2537                         &disk_ceiling,
2538                         &disk_floor,
2539                         &magic,
2540                         &access_mode);
2541         if (r < 0)
2542                 return r;
2543
2544         fstype = fs_type_to_string(magic);
2545
2546         if (disk_floor == UINT64_MAX || (disk_usage != UINT64_MAX && disk_floor < disk_usage))
2547                 disk_floor = disk_usage;
2548         if (disk_floor == UINT64_MAX || disk_floor < USER_DISK_SIZE_MIN)
2549                 disk_floor = USER_DISK_SIZE_MIN;
2550         if (disk_ceiling == UINT64_MAX || disk_ceiling > USER_DISK_SIZE_MAX)
2551                 disk_ceiling = USER_DISK_SIZE_MAX;
2552
2553         r = json_build(&status,
2554                        JSON_BUILD_OBJECT(
2555                                        JSON_BUILD_PAIR("state", JSON_BUILD_STRING(home_state_to_string(state))),
2556                                        JSON_BUILD_PAIR("service", JSON_BUILD_CONST_STRING("io.systemd.Home")),
2557                                        JSON_BUILD_PAIR_CONDITION(disk_size != UINT64_MAX, "diskSize", JSON_BUILD_UNSIGNED(disk_size)),
2558                                        JSON_BUILD_PAIR_CONDITION(disk_usage != UINT64_MAX, "diskUsage", JSON_BUILD_UNSIGNED(disk_usage)),
2559                                        JSON_BUILD_PAIR_CONDITION(disk_free != UINT64_MAX, "diskFree", JSON_BUILD_UNSIGNED(disk_free)),
2560                                        JSON_BUILD_PAIR_CONDITION(disk_ceiling != UINT64_MAX, "diskCeiling", JSON_BUILD_UNSIGNED(disk_ceiling)),
2561                                        JSON_BUILD_PAIR_CONDITION(disk_floor != UINT64_MAX, "diskFloor", JSON_BUILD_UNSIGNED(disk_floor)),
2562                                        JSON_BUILD_PAIR_CONDITION(h->signed_locally >= 0, "signedLocally", JSON_BUILD_BOOLEAN(h->signed_locally)),
2563                                        JSON_BUILD_PAIR_CONDITION(fstype, "fileSystemType", JSON_BUILD_STRING(fstype)),
2564                                        JSON_BUILD_PAIR_CONDITION(access_mode != MODE_INVALID, "accessMode", JSON_BUILD_UNSIGNED(access_mode))
2565                        ));
2566         if (r < 0)
2567                 return r;
2568
2569         j = json_variant_ref(h->record->json);
2570         v = json_variant_ref(json_variant_by_key(j, "status"));
2571         m = json_variant_ref(json_variant_by_key(v, SD_ID128_TO_STRING(id)));
2572
2573         r = json_variant_filter(&m, STRV_MAKE("diskSize", "diskUsage", "diskFree", "diskCeiling", "diskFloor", "signedLocally"));
2574         if (r < 0)
2575                 return r;
2576
2577         r = json_variant_merge(&m, status);
2578         if (r < 0)
2579                 return r;
2580
2581         r = json_variant_set_field(&v, SD_ID128_TO_STRING(id), m);
2582         if (r < 0)
2583                 return r;
2584
2585         r = json_variant_set_field(&j, "status", v);
2586         if (r < 0)
2587                 return r;
2588
2589         ur = user_record_new();
2590         if (!ur)
2591                 return -ENOMEM;
2592
2593         r = user_record_load(ur, j, flags);
2594         if (r < 0)
2595                 return r;
2596
2597         ur->incomplete =
2598                 FLAGS_SET(h->record->mask, USER_RECORD_PRIVILEGED) &&
2599                 !FLAGS_SET(ur->mask, USER_RECORD_PRIVILEGED);
2600
2601         *ret = TAKE_PTR(ur);
2602         return 0;
2603 }
2604
2605 static int on_home_ref_eof(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
2606         _cleanup_(operation_unrefp) Operation *o = NULL;
2607         Home *h = ASSERT_PTR(userdata);
2608
2609         assert(s);
2610
2611         if (h->ref_event_source_please_suspend == s)
2612                 h->ref_event_source_please_suspend = sd_event_source_disable_unref(h->ref_event_source_please_suspend);
2613
2614         if (h->ref_event_source_dont_suspend == s)
2615                 h->ref_event_source_dont_suspend = sd_event_source_disable_unref(h->ref_event_source_dont_suspend);
2616
2617         if (h->ref_event_source_dont_suspend || h->ref_event_source_please_suspend)
2618                 return 0;
2619
2620         log_info("Got notification that all sessions of user %s ended, deactivating automatically.", h->user_name);
2621
2622         o = operation_new(OPERATION_PIPE_EOF, NULL);
2623         if (!o) {
2624                 log_oom();
2625                 return 0;
2626         }
2627
2628         home_schedule_operation(h, o, NULL);
2629         return 0;
2630 }
2631
2632 int home_create_fifo(Home *h, bool please_suspend) {
2633         _cleanup_close_ int ret_fd = -EBADF;
2634         sd_event_source **ss;
2635         const char *fn, *suffix;
2636         int r;
2637
2638         assert(h);
2639
2640         if (please_suspend) {
2641                 suffix = ".please-suspend";
2642                 ss = &h->ref_event_source_please_suspend;
2643         } else {
2644                 suffix = ".dont-suspend";
2645                 ss = &h->ref_event_source_dont_suspend;
2646         }
2647
2648         fn = strjoina("/run/systemd/home/", h->user_name, suffix);
2649
2650         if (!*ss) {
2651                 _cleanup_close_ int ref_fd = -EBADF;
2652
2653                 (void) mkdir("/run/systemd/home/", 0755);
2654                 if (mkfifo(fn, 0600) < 0 && errno != EEXIST)
2655                         return log_error_errno(errno, "Failed to create FIFO %s: %m", fn);
2656
2657                 ref_fd = open(fn, O_RDONLY|O_CLOEXEC|O_NONBLOCK);
2658                 if (ref_fd < 0)
2659                         return log_error_errno(errno, "Failed to open FIFO %s for reading: %m", fn);
2660
2661                 r = sd_event_add_io(h->manager->event, ss, ref_fd, 0, on_home_ref_eof, h);
2662                 if (r < 0)
2663                         return log_error_errno(r, "Failed to allocate reference FIFO event source: %m");
2664
2665                 (void) sd_event_source_set_description(*ss, "acquire-ref");
2666
2667                 r = sd_event_source_set_priority(*ss, SD_EVENT_PRIORITY_IDLE-1);
2668                 if (r < 0)
2669                         return r;
2670
2671                 r = sd_event_source_set_io_fd_own(*ss, true);
2672                 if (r < 0)
2673                         return log_error_errno(r, "Failed to pass ownership of FIFO event fd to event source: %m");
2674
2675                 TAKE_FD(ref_fd);
2676         }
2677
2678         ret_fd = open(fn, O_WRONLY|O_CLOEXEC|O_NONBLOCK);
2679         if (ret_fd < 0)
2680                 return log_error_errno(errno, "Failed to open FIFO %s for writing: %m", fn);
2681
2682         return TAKE_FD(ret_fd);
2683 }
2684
2685 static int home_dispatch_acquire(Home *h, Operation *o) {
2686         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2687         int (*call)(Home *h, UserRecord *secret, HomeState for_state, sd_bus_error *error) = NULL;
2688         HomeState for_state;
2689         int r;
2690
2691         assert(h);
2692         assert(o);
2693         assert(o->type == OPERATION_ACQUIRE);
2694
2695         assert(!h->current_operation);
2696
2697         switch (home_get_state(h)) {
2698
2699         case HOME_UNFIXATED:
2700                 for_state = HOME_FIXATING_FOR_ACQUIRE;
2701                 call = home_fixate_internal;
2702                 break;
2703
2704         case HOME_ABSENT:
2705                 r = sd_bus_error_setf(&error, BUS_ERROR_HOME_ABSENT,
2706                                       "Home %s is currently missing or not plugged in.", h->user_name);
2707                 goto check;
2708
2709         case HOME_INACTIVE:
2710         case HOME_DIRTY:
2711                 for_state = HOME_ACTIVATING_FOR_ACQUIRE;
2712                 call = home_activate_internal;
2713                 break;
2714
2715         case HOME_ACTIVE:
2716         case HOME_LINGERING:
2717                 for_state = HOME_AUTHENTICATING_FOR_ACQUIRE;
2718                 call = home_authenticate_internal;
2719                 break;
2720
2721         case HOME_LOCKED:
2722                 for_state = HOME_UNLOCKING_FOR_ACQUIRE;
2723                 call = home_unlock_internal;
2724                 break;
2725
2726         default:
2727                 /* All other cases means we are currently executing an operation, which means the job remains
2728                  * pending. */
2729                 return 0;
2730         }
2731
2732         r = home_ratelimit(h, &error);
2733         if (r >= 0)
2734                 r = call(h, o->secret, for_state, &error);
2735
2736  check:
2737         if (r != 0) /* failure or completed */
2738                 operation_result(o, r, &error);
2739         else /* ongoing */
2740                 h->current_operation = operation_ref(o);
2741
2742         return 1;
2743 }
2744
2745 static int home_dispatch_release(Home *h, Operation *o) {
2746         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2747         int r;
2748
2749         assert(h);
2750         assert(o);
2751         assert(o->type == OPERATION_RELEASE);
2752
2753         if (h->ref_event_source_dont_suspend || h->ref_event_source_please_suspend)
2754                 /* If there's now a reference again, then let's abort the release attempt */
2755                 r = sd_bus_error_setf(&error, BUS_ERROR_HOME_BUSY, "Home %s is currently referenced.", h->user_name);
2756         else {
2757                 switch (home_get_state(h)) {
2758
2759                 case HOME_UNFIXATED:
2760                 case HOME_ABSENT:
2761                 case HOME_INACTIVE:
2762                 case HOME_DIRTY:
2763                         r = 1; /* done */
2764                         break;
2765
2766                 case HOME_LOCKED:
2767                         r = sd_bus_error_setf(&error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
2768                         break;
2769
2770                 case HOME_ACTIVE:
2771                 case HOME_LINGERING:
2772                         r = home_deactivate_internal(h, false, &error);
2773                         break;
2774
2775                 default:
2776                         /* All other cases means we are currently executing an operation, which means the job remains
2777                          * pending. */
2778                         return 0;
2779                 }
2780         }
2781
2782         assert(!h->current_operation);
2783
2784         if (r != 0) /* failure or completed */
2785                 operation_result(o, r, &error);
2786         else /* ongoing */
2787                 h->current_operation = operation_ref(o);
2788
2789         return 1;
2790 }
2791
2792 static int home_dispatch_lock_all(Home *h, Operation *o) {
2793         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2794         int r;
2795
2796         assert(h);
2797         assert(o);
2798         assert(o->type == OPERATION_LOCK_ALL);
2799
2800         switch (home_get_state(h)) {
2801
2802         case HOME_UNFIXATED:
2803         case HOME_ABSENT:
2804         case HOME_INACTIVE:
2805         case HOME_DIRTY:
2806                 log_info("Home %s is not active, no locking necessary.", h->user_name);
2807                 r = 1; /* done */
2808                 break;
2809
2810         case HOME_LOCKED:
2811                 log_info("Home %s is already locked.", h->user_name);
2812                 r = 1; /* done */
2813                 break;
2814
2815         case HOME_ACTIVE:
2816         case HOME_LINGERING:
2817                 log_info("Locking home %s.", h->user_name);
2818                 r = home_lock(h, &error);
2819                 break;
2820
2821         default:
2822                 /* All other cases means we are currently executing an operation, which means the job remains
2823                  * pending. */
2824                 return 0;
2825         }
2826
2827         assert(!h->current_operation);
2828
2829         if (r != 0) /* failure or completed */
2830                 operation_result(o, r, &error);
2831         else /* ongoing */
2832                 h->current_operation = operation_ref(o);
2833
2834         return 1;
2835 }
2836
2837 static int home_dispatch_deactivate_all(Home *h, Operation *o) {
2838         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2839         int r;
2840
2841         assert(h);
2842         assert(o);
2843         assert(o->type == OPERATION_DEACTIVATE_ALL);
2844
2845         switch (home_get_state(h)) {
2846
2847         case HOME_UNFIXATED:
2848         case HOME_ABSENT:
2849         case HOME_INACTIVE:
2850         case HOME_DIRTY:
2851                 log_info("Home %s is already deactivated.", h->user_name);
2852                 r = 1; /* done */
2853                 break;
2854
2855         case HOME_LOCKED:
2856                 log_info("Home %s is currently locked, not deactivating.", h->user_name);
2857                 r = 1; /* done */
2858                 break;
2859
2860         case HOME_ACTIVE:
2861         case HOME_LINGERING:
2862                 log_info("Deactivating home %s.", h->user_name);
2863                 r = home_deactivate_internal(h, false, &error);
2864                 break;
2865
2866         default:
2867                 /* All other cases means we are currently executing an operation, which means the job remains
2868                  * pending. */
2869                 return 0;
2870         }
2871
2872         assert(!h->current_operation);
2873
2874         if (r != 0) /* failure or completed */
2875                 operation_result(o, r, &error);
2876         else /* ongoing */
2877                 h->current_operation = operation_ref(o);
2878
2879         return 1;
2880 }
2881
2882 static int home_dispatch_pipe_eof(Home *h, Operation *o) {
2883         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2884         int r;
2885
2886         assert(h);
2887         assert(o);
2888         assert(o->type == OPERATION_PIPE_EOF);
2889
2890         if (h->ref_event_source_please_suspend || h->ref_event_source_dont_suspend)
2891                 return 1; /* Hmm, there's a reference again, let's cancel this */
2892
2893         switch (home_get_state(h)) {
2894
2895         case HOME_UNFIXATED:
2896         case HOME_ABSENT:
2897         case HOME_INACTIVE:
2898         case HOME_DIRTY:
2899                 log_info("Home %s already deactivated, no automatic deactivation needed.", h->user_name);
2900                 break;
2901
2902         case HOME_DEACTIVATING:
2903                 log_info("Home %s is already being deactivated, automatic deactivated unnecessary.", h->user_name);
2904                 break;
2905
2906         case HOME_ACTIVE:
2907         case HOME_LINGERING:
2908                 r = home_deactivate_internal(h, false, &error);
2909                 if (r < 0)
2910                         log_warning_errno(r, "Failed to deactivate %s, ignoring: %s", h->user_name, bus_error_message(&error, r));
2911                 break;
2912
2913         case HOME_LOCKED:
2914         default:
2915                 /* If the device is locked or any operation is being executed, let's leave this pending */
2916                 return 0;
2917         }
2918
2919         /* Note that we don't call operation_fail() or operation_success() here, because this kind of
2920          * operation has no message associated with it, and thus there's no need to propagate success. */
2921
2922         assert(!o->message);
2923         return 1;
2924 }
2925
2926 static int home_dispatch_deactivate_force(Home *h, Operation *o) {
2927         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2928         int r;
2929
2930         assert(h);
2931         assert(o);
2932         assert(o->type == OPERATION_DEACTIVATE_FORCE);
2933
2934         switch (home_get_state(h)) {
2935
2936         case HOME_UNFIXATED:
2937         case HOME_ABSENT:
2938         case HOME_INACTIVE:
2939         case HOME_DIRTY:
2940                 log_debug("Home %s already deactivated, no forced deactivation due to unplug needed.", h->user_name);
2941                 break;
2942
2943         case HOME_DEACTIVATING:
2944                 log_debug("Home %s is already being deactivated, forced deactivation due to unplug unnecessary.", h->user_name);
2945                 break;
2946
2947         case HOME_ACTIVE:
2948         case HOME_LOCKED:
2949         case HOME_LINGERING:
2950                 r = home_deactivate_internal(h, true, &error);
2951                 if (r < 0)
2952                         log_warning_errno(r, "Failed to forcibly deactivate %s, ignoring: %s", h->user_name, bus_error_message(&error, r));
2953                 break;
2954
2955         default:
2956                 /* If any operation is being executed, let's leave this pending */
2957                 return 0;
2958         }
2959
2960         /* Note that we don't call operation_fail() or operation_success() here, because this kind of
2961          * operation has no message associated with it, and thus there's no need to propagate success. */
2962
2963         assert(!o->message);
2964         return 1;
2965 }
2966
2967 static int on_pending(sd_event_source *s, void *userdata) {
2968         Home *h = ASSERT_PTR(userdata);
2969         Operation *o;
2970         int r;
2971
2972         assert(s);
2973
2974         o = ordered_set_first(h->pending_operations);
2975         if (o) {
2976                 static int (* const operation_table[_OPERATION_MAX])(Home *h, Operation *o) = {
2977                         [OPERATION_ACQUIRE]          = home_dispatch_acquire,
2978                         [OPERATION_RELEASE]          = home_dispatch_release,
2979                         [OPERATION_LOCK_ALL]         = home_dispatch_lock_all,
2980                         [OPERATION_DEACTIVATE_ALL]   = home_dispatch_deactivate_all,
2981                         [OPERATION_PIPE_EOF]         = home_dispatch_pipe_eof,
2982                         [OPERATION_DEACTIVATE_FORCE] = home_dispatch_deactivate_force,
2983                 };
2984
2985                 assert(operation_table[o->type]);
2986                 r = operation_table[o->type](h, o);
2987                 if (r != 0) {
2988                         /* The operation completed, let's remove it from the pending list, and exit while
2989                          * leaving the event source enabled as it is. */
2990                         assert_se(ordered_set_remove(h->pending_operations, o) == o);
2991                         operation_unref(o);
2992                         return 0;
2993                 }
2994         }
2995
2996         /* Nothing to do anymore, let's turn off this event source */
2997         r = sd_event_source_set_enabled(s, SD_EVENT_OFF);
2998         if (r < 0)
2999                 return log_error_errno(r, "Failed to disable event source: %m");
3000
3001         /* No operations pending anymore, maybe this is a good time to trigger a rebalancing */
3002         manager_reschedule_rebalance(h->manager);
3003         return 0;
3004 }
3005
3006 int home_schedule_operation(Home *h, Operation *o, sd_bus_error *error) {
3007         int r;
3008
3009         assert(h);
3010
3011         if (o) {
3012                 if (ordered_set_size(h->pending_operations) >= PENDING_OPERATIONS_MAX)
3013                         return sd_bus_error_set(error, BUS_ERROR_TOO_MANY_OPERATIONS, "Too many client operations requested");
3014
3015                 r = ordered_set_ensure_put(&h->pending_operations, &operation_hash_ops, o);
3016                 if (r < 0)
3017                         return r;
3018
3019                 operation_ref(o);
3020         }
3021
3022         if (!h->pending_event_source) {
3023                 r = sd_event_add_defer(h->manager->event, &h->pending_event_source, on_pending, h);
3024                 if (r < 0)
3025                         return log_error_errno(r, "Failed to allocate pending defer event source: %m");
3026
3027                 (void) sd_event_source_set_description(h->pending_event_source, "pending");
3028
3029                 r = sd_event_source_set_priority(h->pending_event_source, SD_EVENT_PRIORITY_IDLE);
3030                 if (r < 0)
3031                         return r;
3032         }
3033
3034         r = sd_event_source_set_enabled(h->pending_event_source, SD_EVENT_ON);
3035         if (r < 0)
3036                 return log_error_errno(r, "Failed to trigger pending event source: %m");
3037
3038         return 0;
3039 }
3040
3041 static int home_get_image_path_seat(Home *h, char **ret) {
3042         _cleanup_(sd_device_unrefp) sd_device *d = NULL;
3043         _cleanup_free_ char *c = NULL;
3044         const char *ip, *seat;
3045         struct stat st;
3046         int r;
3047
3048         assert(h);
3049
3050         if (user_record_storage(h->record) != USER_LUKS)
3051                 return -ENXIO;
3052
3053         ip = user_record_image_path(h->record);
3054         if (!ip)
3055                 return -ENXIO;
3056
3057         if (!path_startswith(ip, "/dev/"))
3058                 return -ENXIO;
3059
3060         if (stat(ip, &st) < 0)
3061                 return -errno;
3062
3063         if (!S_ISBLK(st.st_mode))
3064                 return -ENOTBLK;
3065
3066         r = sd_device_new_from_stat_rdev(&d, &st);
3067         if (r < 0)
3068                 return r;
3069
3070         r = sd_device_get_property_value(d, "ID_SEAT", &seat);
3071         if (r == -ENOENT) /* no property means seat0 */
3072                 seat = "seat0";
3073         else if (r < 0)
3074                 return r;
3075
3076         c = strdup(seat);
3077         if (!c)
3078                 return -ENOMEM;
3079
3080         *ret = TAKE_PTR(c);
3081         return 0;
3082 }
3083
3084 int home_auto_login(Home *h, char ***ret_seats) {
3085         _cleanup_free_ char *seat = NULL, *seat2 = NULL;
3086
3087         assert(h);
3088         assert(ret_seats);
3089
3090         (void) home_get_image_path_seat(h, &seat);
3091
3092         if (h->record->auto_login > 0 && !streq_ptr(seat, "seat0")) {
3093                 /* For now, when the auto-login boolean is set for a user, let's make it mean
3094                  * "seat0". Eventually we can extend the concept and allow configuration of any kind of seat,
3095                  * but let's keep simple initially, most likely the feature is interesting on single-user
3096                  * systems anyway, only.
3097                  *
3098                  * We filter out users marked for auto-login in we know for sure their home directory is
3099                  * absent. */
3100
3101                 if (user_record_test_image_path(h->record) != USER_TEST_ABSENT) {
3102                         seat2 = strdup("seat0");
3103                         if (!seat2)
3104                                 return -ENOMEM;
3105                 }
3106         }
3107
3108         if (seat || seat2) {
3109                 _cleanup_strv_free_ char **list = NULL;
3110                 size_t i = 0;
3111
3112                 list = new(char*, 3);
3113                 if (!list)
3114                         return -ENOMEM;
3115
3116                 if (seat)
3117                         list[i++] = TAKE_PTR(seat);
3118                 if (seat2)
3119                         list[i++] = TAKE_PTR(seat2);
3120
3121                 list[i] = NULL;
3122                 *ret_seats = TAKE_PTR(list);
3123                 return 1;
3124         }
3125
3126         *ret_seats = NULL;
3127         return 0;
3128 }
3129
3130 int home_set_current_message(Home *h, sd_bus_message *m) {
3131         assert(h);
3132
3133         if (!m)
3134                 return 0;
3135
3136         if (h->current_operation)
3137                 return -EBUSY;
3138
3139         h->current_operation = operation_new(OPERATION_IMMEDIATE, m);
3140         if (!h->current_operation)
3141                 return -ENOMEM;
3142
3143         return 1;
3144 }
3145
3146 int home_wait_for_worker(Home *h) {
3147         int r;
3148
3149         assert(h);
3150
3151         if (h->worker_pid <= 0)
3152                 return 0;
3153
3154         log_info("Worker process for home %s is still running while exiting. Waiting for it to finish.", h->user_name);
3155
3156         r = wait_for_terminate_with_timeout(h->worker_pid, 30 * USEC_PER_SEC);
3157         if (r == -ETIMEDOUT)
3158                 log_warning_errno(r, "Waiting for worker process for home %s timed out. Ignoring.", h->user_name);
3159         else
3160                 log_warning_errno(r, "Failed to wait for worker process for home %s. Ignoring.", h->user_name);
3161
3162         (void) hashmap_remove_value(h->manager->homes_by_worker_pid, PID_TO_PTR(h->worker_pid), h);
3163         h->worker_pid = 0;
3164         return 1;
3165 }
3166
3167 bool home_shall_rebalance(Home *h) {
3168         HomeState state;
3169
3170         assert(h);
3171
3172         /* Determines if the home directory is a candidate for rebalancing */
3173
3174         if (!user_record_shall_rebalance(h->record))
3175                 return false;
3176
3177         state = home_get_state(h);
3178         if (!HOME_STATE_SHALL_REBALANCE(state))
3179                 return false;
3180
3181         return true;
3182 }
3183
3184 bool home_is_busy(Home *h) {
3185         assert(h);
3186
3187         if (h->current_operation)
3188                 return true;
3189
3190         if (!ordered_set_isempty(h->pending_operations))
3191                 return true;
3192
3193         return HOME_STATE_IS_EXECUTING_OPERATION(home_get_state(h));
3194 }
3195
3196 static const char* const home_state_table[_HOME_STATE_MAX] = {
3197         [HOME_UNFIXATED]                   = "unfixated",
3198         [HOME_ABSENT]                      = "absent",
3199         [HOME_INACTIVE]                    = "inactive",
3200         [HOME_DIRTY]                       = "dirty",
3201         [HOME_FIXATING]                    = "fixating",
3202         [HOME_FIXATING_FOR_ACTIVATION]     = "fixating-for-activation",
3203         [HOME_FIXATING_FOR_ACQUIRE]        = "fixating-for-acquire",
3204         [HOME_ACTIVATING]                  = "activating",
3205         [HOME_ACTIVATING_FOR_ACQUIRE]      = "activating-for-acquire",
3206         [HOME_DEACTIVATING]                = "deactivating",
3207         [HOME_ACTIVE]                      = "active",
3208         [HOME_LINGERING]                   = "lingering",
3209         [HOME_LOCKING]                     = "locking",
3210         [HOME_LOCKED]                      = "locked",
3211         [HOME_UNLOCKING]                   = "unlocking",
3212         [HOME_UNLOCKING_FOR_ACQUIRE]       = "unlocking-for-acquire",
3213         [HOME_CREATING]                    = "creating",
3214         [HOME_REMOVING]                    = "removing",
3215         [HOME_UPDATING]                    = "updating",
3216         [HOME_UPDATING_WHILE_ACTIVE]       = "updating-while-active",
3217         [HOME_RESIZING]                    = "resizing",
3218         [HOME_RESIZING_WHILE_ACTIVE]       = "resizing-while-active",
3219         [HOME_PASSWD]                      = "passwd",
3220         [HOME_PASSWD_WHILE_ACTIVE]         = "passwd-while-active",
3221         [HOME_AUTHENTICATING]              = "authenticating",
3222         [HOME_AUTHENTICATING_WHILE_ACTIVE] = "authenticating-while-active",
3223         [HOME_AUTHENTICATING_FOR_ACQUIRE]  = "authenticating-for-acquire",
3224 };
3225
3226 DEFINE_STRING_TABLE_LOOKUP(home_state, HomeState);