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, STDERR_FILENO },
1184                            NULL, 0,
1185                            FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_REARRANGE_STDIO|FORK_LOG|FORK_REOPEN_LOG, &pid);
1186         if (r < 0)
1187                 return r;
1188         if (r == 0) {
1189                 _cleanup_free_ char *joined = NULL;
1190                 const char *homework, *suffix, *unix_path;
1191
1192                 /* Child */
1193
1194                 suffix = getenv("SYSTEMD_HOME_DEBUG_SUFFIX");
1195                 if (suffix) {
1196                         joined = strjoin("/run/systemd/home/notify.", suffix);
1197                         if (!joined)
1198                                 return log_oom();
1199                         unix_path = joined;
1200                 } else
1201                         unix_path = "/run/systemd/home/notify";
1202
1203                 if (setenv("NOTIFY_SOCKET", unix_path, 1) < 0) {
1204                         log_error_errno(errno, "Failed to set $NOTIFY_SOCKET: %m");
1205                         _exit(EXIT_FAILURE);
1206                 }
1207
1208                 /* If we haven't locked the device yet, ask for a lock to be taken and be passed back to us via sd_notify(). */
1209                 if (setenv("SYSTEMD_LUKS_LOCK", one_zero(h->luks_lock_fd < 0), 1) < 0) {
1210                         log_error_errno(errno, "Failed to set $SYSTEMD_LUKS_LOCK: %m");
1211                         _exit(EXIT_FAILURE);
1212                 }
1213
1214                 if (h->manager->default_storage >= 0)
1215                         if (setenv("SYSTEMD_HOME_DEFAULT_STORAGE", user_storage_to_string(h->manager->default_storage), 1) < 0) {
1216                                 log_error_errno(errno, "Failed to set $SYSTEMD_HOME_DEFAULT_STORAGE: %m");
1217                                 _exit(EXIT_FAILURE);
1218                         }
1219
1220                 if (h->manager->default_file_system_type)
1221                         if (setenv("SYSTEMD_HOME_DEFAULT_FILE_SYSTEM_TYPE", h->manager->default_file_system_type, 1) < 0) {
1222                                 log_error_errno(errno, "Failed to set $SYSTEMD_HOME_DEFAULT_FILE_SYSTEM_TYPE: %m");
1223                                 _exit(EXIT_FAILURE);
1224                         }
1225
1226                 r = setenv_systemd_exec_pid(true);
1227                 if (r < 0)
1228                         log_warning_errno(r, "Failed to update $SYSTEMD_EXEC_PID, ignoring: %m");
1229
1230                 /* Allow overriding the homework path via an environment variable, to make debugging
1231                  * easier. */
1232                 homework = getenv("SYSTEMD_HOMEWORK_PATH") ?: SYSTEMD_HOMEWORK_PATH;
1233
1234                 execl(homework, homework, verb, NULL);
1235                 log_error_errno(errno, "Failed to invoke %s: %m", homework);
1236                 _exit(EXIT_FAILURE);
1237         }
1238
1239         r = sd_event_add_child(h->manager->event, &h->worker_event_source, pid, WEXITED, home_on_worker_process, h);
1240         if (r < 0)
1241                 return r;
1242
1243         (void) sd_event_source_set_description(h->worker_event_source, "worker");
1244
1245         r = hashmap_put(h->manager->homes_by_worker_pid, PID_TO_PTR(pid), h);
1246         if (r < 0) {
1247                 h->worker_event_source = sd_event_source_disable_unref(h->worker_event_source);
1248                 return r;
1249         }
1250
1251         h->worker_stdout_fd = TAKE_FD(stdout_fd);
1252         h->worker_pid = pid;
1253         h->worker_error_code = 0;
1254
1255         return 0;
1256 }
1257
1258 static int home_ratelimit(Home *h, sd_bus_error *error) {
1259         int r, ret;
1260
1261         assert(h);
1262
1263         ret = user_record_ratelimit(h->record);
1264         if (ret < 0)
1265                 return ret;
1266
1267         if (h->state != HOME_UNFIXATED) {
1268                 r = home_save_record(h);
1269                 if (r < 0)
1270                         log_warning_errno(r, "Failed to save updated record, ignoring: %m");
1271         }
1272
1273         if (ret == 0) {
1274                 usec_t t, n;
1275
1276                 n = now(CLOCK_REALTIME);
1277                 t = user_record_ratelimit_next_try(h->record);
1278
1279                 if (t != USEC_INFINITY && t > n)
1280                         return sd_bus_error_setf(error, BUS_ERROR_AUTHENTICATION_LIMIT_HIT,
1281                                                  "Too many login attempts, please try again in %s!",
1282                                                  FORMAT_TIMESPAN(t - n, USEC_PER_SEC));
1283
1284                 return sd_bus_error_set(error, BUS_ERROR_AUTHENTICATION_LIMIT_HIT, "Too many login attempts, please try again later.");
1285         }
1286
1287         return 0;
1288 }
1289
1290 static int home_fixate_internal(
1291                 Home *h,
1292                 UserRecord *secret,
1293                 HomeState for_state,
1294                 sd_bus_error *error) {
1295
1296         int r;
1297
1298         assert(h);
1299         assert(IN_SET(for_state, HOME_FIXATING, HOME_FIXATING_FOR_ACTIVATION, HOME_FIXATING_FOR_ACQUIRE));
1300
1301         r = home_start_work(h, "inspect", h->record, secret);
1302         if (r < 0)
1303                 return r;
1304
1305         if (IN_SET(for_state, HOME_FIXATING_FOR_ACTIVATION, HOME_FIXATING_FOR_ACQUIRE)) {
1306                 /* Remember the secret data, since we need it for the activation again, later on. */
1307                 user_record_unref(h->secret);
1308                 h->secret = user_record_ref(secret);
1309         }
1310
1311         home_set_state(h, for_state);
1312         return 0;
1313 }
1314
1315 int home_fixate(Home *h, UserRecord *secret, sd_bus_error *error) {
1316         int r;
1317
1318         assert(h);
1319
1320         switch (home_get_state(h)) {
1321         case HOME_ABSENT:
1322                 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1323         case HOME_INACTIVE:
1324         case HOME_DIRTY:
1325         case HOME_ACTIVE:
1326         case HOME_LINGERING:
1327         case HOME_LOCKED:
1328                 return sd_bus_error_setf(error, BUS_ERROR_HOME_ALREADY_FIXATED, "Home %s is already fixated.", h->user_name);
1329         case HOME_UNFIXATED:
1330                 break;
1331         default:
1332                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1333         }
1334
1335         r = home_ratelimit(h, error);
1336         if (r < 0)
1337                 return r;
1338
1339         return home_fixate_internal(h, secret, HOME_FIXATING, error);
1340 }
1341
1342 static int home_activate_internal(Home *h, UserRecord *secret, HomeState for_state, sd_bus_error *error) {
1343         int r;
1344
1345         assert(h);
1346         assert(IN_SET(for_state, HOME_ACTIVATING, HOME_ACTIVATING_FOR_ACQUIRE));
1347
1348         r = home_start_work(h, "activate", h->record, secret);
1349         if (r < 0)
1350                 return r;
1351
1352         home_set_state(h, for_state);
1353         return 0;
1354 }
1355
1356 int home_activate(Home *h, UserRecord *secret, sd_bus_error *error) {
1357         int r;
1358
1359         assert(h);
1360
1361         switch (home_get_state(h)) {
1362         case HOME_UNFIXATED:
1363                 return home_fixate_internal(h, secret, HOME_FIXATING_FOR_ACTIVATION, error);
1364         case HOME_ABSENT:
1365                 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1366         case HOME_ACTIVE:
1367                 return sd_bus_error_setf(error, BUS_ERROR_HOME_ALREADY_ACTIVE, "Home %s is already active.", h->user_name);
1368         case HOME_LINGERING:
1369                 /* If we are lingering, i.e. active but are supposed to be deactivated, then cancel this
1370                  * timer if the user explicitly asks us to be active */
1371                 h->retry_deactivate_event_source = sd_event_source_disable_unref(h->retry_deactivate_event_source);
1372                 return 0;
1373         case HOME_LOCKED:
1374                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1375         case HOME_INACTIVE:
1376         case HOME_DIRTY:
1377                 break;
1378         default:
1379                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1380         }
1381
1382         r = home_ratelimit(h, error);
1383         if (r < 0)
1384                 return r;
1385
1386         return home_activate_internal(h, secret, HOME_ACTIVATING, error);
1387 }
1388
1389 static int home_authenticate_internal(Home *h, UserRecord *secret, HomeState for_state, sd_bus_error *error) {
1390         int r;
1391
1392         assert(h);
1393         assert(IN_SET(for_state, HOME_AUTHENTICATING, HOME_AUTHENTICATING_WHILE_ACTIVE, HOME_AUTHENTICATING_FOR_ACQUIRE));
1394
1395         r = home_start_work(h, "inspect", h->record, secret);
1396         if (r < 0)
1397                 return r;
1398
1399         home_set_state(h, for_state);
1400         return 0;
1401 }
1402
1403 int home_authenticate(Home *h, UserRecord *secret, sd_bus_error *error) {
1404         HomeState state;
1405         int r;
1406
1407         assert(h);
1408
1409         state = home_get_state(h);
1410         switch (state) {
1411         case HOME_ABSENT:
1412                 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1413         case HOME_LOCKED:
1414                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1415         case HOME_UNFIXATED:
1416         case HOME_INACTIVE:
1417         case HOME_DIRTY:
1418         case HOME_ACTIVE:
1419         case HOME_LINGERING:
1420                 break;
1421         default:
1422                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1423         }
1424
1425         r = home_ratelimit(h, error);
1426         if (r < 0)
1427                 return r;
1428
1429         return home_authenticate_internal(h, secret, HOME_STATE_IS_ACTIVE(state) ? HOME_AUTHENTICATING_WHILE_ACTIVE : HOME_AUTHENTICATING, error);
1430 }
1431
1432 static int home_deactivate_internal(Home *h, bool force, sd_bus_error *error) {
1433         int r;
1434
1435         assert(h);
1436
1437         home_unpin(h); /* unpin so that we can deactivate */
1438
1439         r = home_start_work(h, force ? "deactivate-force" : "deactivate", h->record, NULL);
1440         if (r < 0)
1441                 /* Operation failed before it even started, reacquire pin fd, if state still dictates so */
1442                 home_update_pin_fd(h, _HOME_STATE_INVALID);
1443         else {
1444                 home_set_state(h, HOME_DEACTIVATING);
1445                 r = 0;
1446         }
1447
1448         /* Let's start a timer to retry deactivation in 15. We'll stop the timer once we manage to deactivate
1449          * the home directory again, or we start any other operation. */
1450         home_start_retry_deactivate(h);
1451
1452         return r;
1453 }
1454
1455 int home_deactivate(Home *h, bool force, sd_bus_error *error) {
1456         assert(h);
1457
1458         switch (home_get_state(h)) {
1459         case HOME_UNFIXATED:
1460         case HOME_ABSENT:
1461         case HOME_INACTIVE:
1462         case HOME_DIRTY:
1463                 return sd_bus_error_setf(error, BUS_ERROR_HOME_NOT_ACTIVE, "Home %s not active.", h->user_name);
1464         case HOME_LOCKED:
1465                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1466         case HOME_ACTIVE:
1467         case HOME_LINGERING:
1468                 break;
1469         default:
1470                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1471         }
1472
1473         return home_deactivate_internal(h, force, error);
1474 }
1475
1476 int home_create(Home *h, UserRecord *secret, sd_bus_error *error) {
1477         int r;
1478
1479         assert(h);
1480
1481         switch (home_get_state(h)) {
1482         case HOME_INACTIVE: {
1483                 int t;
1484
1485                 if (h->record->storage < 0)
1486                         break; /* if no storage is defined we don't know what precisely to look for, hence
1487                                 * HOME_INACTIVE is OK in that case too. */
1488
1489                 t = user_record_test_image_path(h->record);
1490                 if (IN_SET(t, USER_TEST_MAYBE, USER_TEST_UNDEFINED))
1491                         break; /* And if the image path test isn't conclusive, let's also go on */
1492
1493                 if (IN_SET(t, -EBADF, -ENOTDIR))
1494                         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);
1495
1496                 return sd_bus_error_setf(error, BUS_ERROR_HOME_EXISTS, "Selected home image of user %s already exists.", h->user_name);
1497         }
1498         case HOME_UNFIXATED:
1499         case HOME_DIRTY:
1500                 return sd_bus_error_setf(error, BUS_ERROR_HOME_EXISTS, "Home of user %s already exists.", h->user_name);
1501         case HOME_ABSENT:
1502                 break;
1503         case HOME_ACTIVE:
1504         case HOME_LINGERING:
1505         case HOME_LOCKED:
1506         default:
1507                 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);
1508         }
1509
1510         if (h->record->enforce_password_policy == false)
1511                 log_debug("Password quality check turned off for account, skipping.");
1512         else {
1513                 r = user_record_quality_check_password(h->record, secret, error);
1514                 if (r < 0)
1515                         return r;
1516         }
1517
1518         r = home_start_work(h, "create", h->record, secret);
1519         if (r < 0)
1520                 return r;
1521
1522         home_set_state(h, HOME_CREATING);
1523         return 0;
1524 }
1525
1526 int home_remove(Home *h, sd_bus_error *error) {
1527         HomeState state;
1528         int r;
1529
1530         assert(h);
1531
1532         state = home_get_state(h);
1533         switch (state) {
1534         case HOME_ABSENT: /* If the home directory is absent, then this is just like unregistering */
1535                 return home_unregister(h, error);
1536         case HOME_LOCKED:
1537                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1538         case HOME_UNFIXATED:
1539         case HOME_INACTIVE:
1540         case HOME_DIRTY:
1541                 break;
1542         case HOME_ACTIVE:
1543         case HOME_LINGERING:
1544         default:
1545                 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);
1546         }
1547
1548         r = home_start_work(h, "remove", h->record, NULL);
1549         if (r < 0)
1550                 return r;
1551
1552         home_set_state(h, HOME_REMOVING);
1553         return 0;
1554 }
1555
1556 static int user_record_extend_with_binding(UserRecord *hr, UserRecord *with_binding, UserRecordLoadFlags flags, UserRecord **ret) {
1557         _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
1558         _cleanup_(user_record_unrefp) UserRecord *nr = NULL;
1559         JsonVariant *binding;
1560         int r;
1561
1562         assert(hr);
1563         assert(with_binding);
1564         assert(ret);
1565
1566         assert_se(v = json_variant_ref(hr->json));
1567
1568         binding = json_variant_by_key(with_binding->json, "binding");
1569         if (binding) {
1570                 r = json_variant_set_field(&v, "binding", binding);
1571                 if (r < 0)
1572                         return r;
1573         }
1574
1575         nr = user_record_new();
1576         if (!nr)
1577                 return -ENOMEM;
1578
1579         r = user_record_load(nr, v, flags);
1580         if (r < 0)
1581                 return r;
1582
1583         *ret = TAKE_PTR(nr);
1584         return 0;
1585 }
1586
1587 static int home_update_internal(
1588                 Home *h,
1589                 const char *verb,
1590                 UserRecord *hr,
1591                 UserRecord *secret,
1592                 sd_bus_error *error) {
1593
1594         _cleanup_(user_record_unrefp) UserRecord *new_hr = NULL, *saved_secret = NULL, *signed_hr = NULL;
1595         int r, c;
1596
1597         assert(h);
1598         assert(verb);
1599         assert(hr);
1600
1601         if (!user_record_compatible(hr, h->record))
1602                 return sd_bus_error_set(error, BUS_ERROR_HOME_RECORD_MISMATCH, "Updated user record is not compatible with existing one.");
1603         c = user_record_compare_last_change(hr, h->record); /* refuse downgrades */
1604         if (c < 0)
1605                 return sd_bus_error_set(error, BUS_ERROR_HOME_RECORD_DOWNGRADE, "Refusing to update to older home record.");
1606
1607         if (!secret && FLAGS_SET(hr->mask, USER_RECORD_SECRET)) {
1608                 r = user_record_clone(hr, USER_RECORD_EXTRACT_SECRET|USER_RECORD_PERMISSIVE, &saved_secret);
1609                 if (r < 0)
1610                         return r;
1611
1612                 secret = saved_secret;
1613         }
1614
1615         r = manager_verify_user_record(h->manager, hr);
1616         switch (r) {
1617
1618         case USER_RECORD_UNSIGNED:
1619                 if (h->signed_locally <= 0) /* If the existing record is not owned by us, don't accept an
1620                                              * unsigned new record. i.e. only implicitly sign new records
1621                                              * that where previously signed by us too. */
1622                         return sd_bus_error_setf(error, BUS_ERROR_HOME_RECORD_SIGNED, "Home %s is signed and cannot be modified locally.", h->user_name);
1623
1624                 /* The updated record is not signed, then do so now */
1625                 r = manager_sign_user_record(h->manager, hr, &signed_hr, error);
1626                 if (r < 0)
1627                         return r;
1628
1629                 hr = signed_hr;
1630                 break;
1631
1632         case USER_RECORD_SIGNED_EXCLUSIVE:
1633         case USER_RECORD_SIGNED:
1634         case USER_RECORD_FOREIGN:
1635                 /* Has already been signed. Great! */
1636                 break;
1637
1638         case -ENOKEY:
1639         default:
1640                 return r;
1641         }
1642
1643         r = user_record_extend_with_binding(hr, h->record, USER_RECORD_LOAD_MASK_SECRET|USER_RECORD_PERMISSIVE, &new_hr);
1644         if (r < 0)
1645                 return r;
1646
1647         if (c == 0) {
1648                 /* different payload but same lastChangeUSec field? That's not cool! */
1649
1650                 r = user_record_masked_equal(new_hr, h->record, USER_RECORD_REGULAR|USER_RECORD_PRIVILEGED|USER_RECORD_PER_MACHINE);
1651                 if (r < 0)
1652                         return r;
1653                 if (r == 0)
1654                         return sd_bus_error_set(error, BUS_ERROR_HOME_RECORD_MISMATCH, "Home record different but timestamp remained the same, refusing.");
1655         }
1656
1657         r = home_start_work(h, verb, new_hr, secret);
1658         if (r < 0)
1659                 return r;
1660
1661         return 0;
1662 }
1663
1664 int home_update(Home *h, UserRecord *hr, sd_bus_error *error) {
1665         HomeState state;
1666         int r;
1667
1668         assert(h);
1669         assert(hr);
1670
1671         state = home_get_state(h);
1672         switch (state) {
1673         case HOME_UNFIXATED:
1674                 return sd_bus_error_setf(error, BUS_ERROR_HOME_UNFIXATED, "Home %s has not been fixated yet.", h->user_name);
1675         case HOME_ABSENT:
1676                 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1677         case HOME_LOCKED:
1678                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1679         case HOME_INACTIVE:
1680         case HOME_DIRTY:
1681         case HOME_ACTIVE:
1682         case HOME_LINGERING:
1683                 break;
1684         default:
1685                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1686         }
1687
1688         r = home_ratelimit(h, error);
1689         if (r < 0)
1690                 return r;
1691
1692         r = home_update_internal(h, "update", hr, NULL, error);
1693         if (r < 0)
1694                 return r;
1695
1696         home_set_state(h, HOME_STATE_IS_ACTIVE(state) ? HOME_UPDATING_WHILE_ACTIVE : HOME_UPDATING);
1697         return 0;
1698 }
1699
1700 int home_resize(Home *h,
1701                 uint64_t disk_size,
1702                 UserRecord *secret,
1703                 bool automatic,
1704                 sd_bus_error *error) {
1705
1706         _cleanup_(user_record_unrefp) UserRecord *c = NULL;
1707         HomeState state;
1708         int r;
1709
1710         assert(h);
1711
1712         state = home_get_state(h);
1713         switch (state) {
1714         case HOME_UNFIXATED:
1715                 return sd_bus_error_setf(error, BUS_ERROR_HOME_UNFIXATED, "Home %s has not been fixated yet.", h->user_name);
1716         case HOME_ABSENT:
1717                 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1718         case HOME_LOCKED:
1719                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1720         case HOME_INACTIVE:
1721         case HOME_DIRTY:
1722         case HOME_ACTIVE:
1723         case HOME_LINGERING:
1724                 break;
1725         default:
1726                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1727         }
1728
1729         r = home_ratelimit(h, error);
1730         if (r < 0)
1731                 return r;
1732
1733         /* If the user didn't specify any size explicitly and rebalancing is on, then the disk size is
1734          * determined by automatic rebalancing and hence not user configured but determined by us and thus
1735          * applied anyway. */
1736         if (disk_size == UINT64_MAX && h->record->rebalance_weight != REBALANCE_WEIGHT_OFF)
1737                 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Disk size is being determined by automatic disk space rebalancing.");
1738
1739         if (disk_size == UINT64_MAX || disk_size == h->record->disk_size) {
1740                 if (h->record->disk_size == UINT64_MAX)
1741                         return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "No disk size to resize to specified.");
1742
1743                 c = user_record_ref(h->record); /* Shortcut if size is unspecified or matches the record */
1744         } else {
1745                 _cleanup_(user_record_unrefp) UserRecord *signed_c = NULL;
1746
1747                 if (h->signed_locally <= 0) /* Don't allow changing of records not signed only by us */
1748                         return sd_bus_error_setf(error, BUS_ERROR_HOME_RECORD_SIGNED, "Home %s is signed and cannot be modified locally.", h->user_name);
1749
1750                 r = user_record_clone(h->record, USER_RECORD_LOAD_REFUSE_SECRET|USER_RECORD_PERMISSIVE, &c);
1751                 if (r < 0)
1752                         return r;
1753
1754                 r = user_record_set_disk_size(c, disk_size);
1755                 if (r == -ERANGE)
1756                         return sd_bus_error_setf(error, BUS_ERROR_BAD_HOME_SIZE, "Requested size for home %s out of acceptable range.", h->user_name);
1757                 if (r < 0)
1758                         return r;
1759
1760                 /* If user picked an explicit size, then turn off rebalancing, so that we don't undo what user chose */
1761                 r = user_record_set_rebalance_weight(c, REBALANCE_WEIGHT_OFF);
1762                 if (r < 0)
1763                         return r;
1764
1765                 r = user_record_update_last_changed(c, false);
1766                 if (r == -ECHRNG)
1767                         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);
1768                 if (r < 0)
1769                         return r;
1770
1771                 r = manager_sign_user_record(h->manager, c, &signed_c, error);
1772                 if (r < 0)
1773                         return r;
1774
1775                 user_record_unref(c);
1776                 c = TAKE_PTR(signed_c);
1777         }
1778
1779         r = home_update_internal(h, automatic ? "resize-auto" : "resize", c, secret, error);
1780         if (r < 0)
1781                 return r;
1782
1783         home_set_state(h, HOME_STATE_IS_ACTIVE(state) ? HOME_RESIZING_WHILE_ACTIVE : HOME_RESIZING);
1784         return 0;
1785 }
1786
1787 static int home_may_change_password(
1788                 Home *h,
1789                 sd_bus_error *error) {
1790
1791         int r;
1792
1793         assert(h);
1794
1795         r = user_record_test_password_change_required(h->record);
1796         if (IN_SET(r, -EKEYREVOKED, -EOWNERDEAD, -EKEYEXPIRED, -ESTALE))
1797                 return 0; /* expired in some form, but changing is allowed */
1798         if (IN_SET(r, -EKEYREJECTED, -EROFS))
1799                 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);
1800         if (r < 0)
1801                 return log_error_errno(r, "Failed to test password expiry: %m");
1802
1803         return 0; /* not expired */
1804 }
1805
1806 int home_passwd(Home *h,
1807                 UserRecord *new_secret,
1808                 UserRecord *old_secret,
1809                 sd_bus_error *error) {
1810
1811         _cleanup_(user_record_unrefp) UserRecord *c = NULL, *merged_secret = NULL, *signed_c = NULL;
1812         HomeState state;
1813         int r;
1814
1815         assert(h);
1816
1817         if (h->signed_locally <= 0) /* Don't allow changing of records not signed only by us */
1818                 return sd_bus_error_setf(error, BUS_ERROR_HOME_RECORD_SIGNED, "Home %s is signed and cannot be modified locally.", h->user_name);
1819
1820         state = home_get_state(h);
1821         switch (state) {
1822         case HOME_UNFIXATED:
1823                 return sd_bus_error_setf(error, BUS_ERROR_HOME_UNFIXATED, "Home %s has not been fixated yet.", h->user_name);
1824         case HOME_ABSENT:
1825                 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1826         case HOME_LOCKED:
1827                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1828         case HOME_INACTIVE:
1829         case HOME_DIRTY:
1830         case HOME_ACTIVE:
1831         case HOME_LINGERING:
1832                 break;
1833         default:
1834                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1835         }
1836
1837         r = home_ratelimit(h, error);
1838         if (r < 0)
1839                 return r;
1840
1841         r = home_may_change_password(h, error);
1842         if (r < 0)
1843                 return r;
1844
1845         r = user_record_clone(h->record, USER_RECORD_LOAD_REFUSE_SECRET|USER_RECORD_PERMISSIVE, &c);
1846         if (r < 0)
1847                 return r;
1848
1849         merged_secret = user_record_new();
1850         if (!merged_secret)
1851                 return -ENOMEM;
1852
1853         r = user_record_merge_secret(merged_secret, old_secret);
1854         if (r < 0)
1855                 return r;
1856
1857         r = user_record_merge_secret(merged_secret, new_secret);
1858         if (r < 0)
1859                 return r;
1860
1861         if (!strv_isempty(new_secret->password)) {
1862                 /* Update the password only if one is specified, otherwise let's just reuse the old password
1863                  * data. This is useful as a way to propagate updated user records into the LUKS backends
1864                  * properly. */
1865
1866                 r = user_record_make_hashed_password(c, new_secret->password, /* extend = */ false);
1867                 if (r < 0)
1868                         return r;
1869
1870                 r = user_record_set_password_change_now(c, -1 /* remove */);
1871                 if (r < 0)
1872                         return r;
1873         }
1874
1875         r = user_record_update_last_changed(c, true);
1876         if (r == -ECHRNG)
1877                 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);
1878         if (r < 0)
1879                 return r;
1880
1881         r = manager_sign_user_record(h->manager, c, &signed_c, error);
1882         if (r < 0)
1883                 return r;
1884
1885         if (c->enforce_password_policy == false)
1886                 log_debug("Password quality check turned off for account, skipping.");
1887         else {
1888                 r = user_record_quality_check_password(c, merged_secret, error);
1889                 if (r < 0)
1890                         return r;
1891         }
1892
1893         r = home_update_internal(h, "passwd", signed_c, merged_secret, error);
1894         if (r < 0)
1895                 return r;
1896
1897         home_set_state(h, HOME_STATE_IS_ACTIVE(state) ? HOME_PASSWD_WHILE_ACTIVE : HOME_PASSWD);
1898         return 0;
1899 }
1900
1901 int home_unregister(Home *h, sd_bus_error *error) {
1902         int r;
1903
1904         assert(h);
1905
1906         switch (home_get_state(h)) {
1907         case HOME_UNFIXATED:
1908                 return sd_bus_error_setf(error, BUS_ERROR_HOME_UNFIXATED, "Home %s is not registered.", h->user_name);
1909         case HOME_LOCKED:
1910                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1911         case HOME_ABSENT:
1912         case HOME_INACTIVE:
1913         case HOME_DIRTY:
1914                 break;
1915         case HOME_ACTIVE:
1916         case HOME_LINGERING:
1917         default:
1918                 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);
1919         }
1920
1921         r = home_unlink_record(h);
1922         if (r < 0)
1923                 return r;
1924
1925         /* And destroy the whole entry. The caller needs to be prepared for that. */
1926         h = home_free(h);
1927         return 1;
1928 }
1929
1930 int home_lock(Home *h, sd_bus_error *error) {
1931         int r;
1932
1933         assert(h);
1934
1935         switch (home_get_state(h)) {
1936         case HOME_UNFIXATED:
1937         case HOME_ABSENT:
1938         case HOME_INACTIVE:
1939         case HOME_DIRTY:
1940                 return sd_bus_error_setf(error, BUS_ERROR_HOME_NOT_ACTIVE, "Home %s is not active.", h->user_name);
1941         case HOME_LOCKED:
1942                 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is already locked.", h->user_name);
1943         case HOME_ACTIVE:
1944         case HOME_LINGERING:
1945                 break;
1946         default:
1947                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1948         }
1949
1950         r = home_start_work(h, "lock", h->record, NULL);
1951         if (r < 0)
1952                 return r;
1953
1954         home_set_state(h, HOME_LOCKING);
1955         return 0;
1956 }
1957
1958 static int home_unlock_internal(Home *h, UserRecord *secret, HomeState for_state, sd_bus_error *error) {
1959         int r;
1960
1961         assert(h);
1962         assert(IN_SET(for_state, HOME_UNLOCKING, HOME_UNLOCKING_FOR_ACQUIRE));
1963
1964         r = home_start_work(h, "unlock", h->record, secret);
1965         if (r < 0)
1966                 return r;
1967
1968         home_set_state(h, for_state);
1969         return 0;
1970 }
1971
1972 int home_unlock(Home *h, UserRecord *secret, sd_bus_error *error) {
1973         int r;
1974         assert(h);
1975
1976         r = home_ratelimit(h, error);
1977         if (r < 0)
1978                 return r;
1979
1980         switch (home_get_state(h)) {
1981         case HOME_UNFIXATED:
1982         case HOME_ABSENT:
1983         case HOME_INACTIVE:
1984         case HOME_ACTIVE:
1985         case HOME_LINGERING:
1986         case HOME_DIRTY:
1987                 return sd_bus_error_setf(error, BUS_ERROR_HOME_NOT_LOCKED, "Home %s is not locked.", h->user_name);
1988         case HOME_LOCKED:
1989                 break;
1990         default:
1991                 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1992         }
1993
1994         return home_unlock_internal(h, secret, HOME_UNLOCKING, error);
1995 }
1996
1997 HomeState home_get_state(Home *h) {
1998         int r;
1999         assert(h);
2000
2001         /* When the state field is initialized, it counts. */
2002         if (h->state >= 0)
2003                 return h->state;
2004
2005         /* Otherwise, let's see if the home directory is mounted. If so, we assume for sure the home
2006          * directory is active */
2007         if (user_record_test_home_directory(h->record) == USER_TEST_MOUNTED)
2008                 return h->retry_deactivate_event_source ? HOME_LINGERING : HOME_ACTIVE;
2009
2010         /* And if we see the image being gone, we report this as absent */
2011         r = user_record_test_image_path(h->record);
2012         if (r == USER_TEST_ABSENT)
2013                 return HOME_ABSENT;
2014         if (r == USER_TEST_DIRTY)
2015                 return HOME_DIRTY;
2016
2017         /* And for all other cases we return "inactive". */
2018         return HOME_INACTIVE;
2019 }
2020
2021 void home_process_notify(Home *h, char **l, int fd) {
2022         _cleanup_close_ int taken_fd = TAKE_FD(fd);
2023         const char *e;
2024         int error;
2025         int r;
2026
2027         assert(h);
2028
2029         e = strv_env_get(l, "SYSTEMD_LUKS_LOCK_FD");
2030         if (e) {
2031                 r = parse_boolean(e);
2032                 if (r < 0)
2033                         return (void) log_debug_errno(r, "Failed to parse SYSTEMD_LUKS_LOCK_FD value: %m");
2034                 if (r > 0) {
2035                         if (taken_fd < 0)
2036                                 return (void) log_debug("Got notify message with SYSTEMD_LUKS_LOCK_FD=1 but no fd passed, ignoring: %m");
2037
2038                         close_and_replace(h->luks_lock_fd, taken_fd);
2039
2040                         log_debug("Successfully acquired LUKS lock fd from worker.");
2041
2042                         /* Immediately check if we actually want to keep it */
2043                         home_maybe_close_luks_lock_fd(h, _HOME_STATE_INVALID);
2044                 } else {
2045                         if (taken_fd >= 0)
2046                                 return (void) log_debug("Got notify message with SYSTEMD_LUKS_LOCK_FD=0 but fd passed, ignoring: %m");
2047
2048                         h->luks_lock_fd = safe_close(h->luks_lock_fd);
2049                 }
2050
2051                 return;
2052         }
2053
2054         e = strv_env_get(l, "ERRNO");
2055         if (!e)
2056                 return (void) log_debug("Got notify message lacking both ERRNO= and SYSTEMD_LUKS_LOCK_FD= field, ignoring.");
2057
2058         r = safe_atoi(e, &error);
2059         if (r < 0)
2060                 return (void) log_debug_errno(r, "Failed to parse received error number, ignoring: %s", e);
2061         if (error <= 0)
2062                 return (void) log_debug("Error number is out of range: %i", error);
2063
2064         h->worker_error_code = error;
2065 }
2066
2067 int home_killall(Home *h) {
2068         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2069         _cleanup_free_ char *unit = NULL;
2070         int r;
2071
2072         assert(h);
2073
2074         if (!uid_is_valid(h->uid))
2075                 return 0;
2076
2077         assert(h->uid > 0); /* We never should be UID 0 */
2078
2079         /* Let's kill everything matching the specified UID */
2080         r = safe_fork("(sd-killer)",
2081                       FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_WAIT|FORK_LOG|FORK_REOPEN_LOG,
2082                       NULL);
2083         if (r < 0)
2084                 return r;
2085         if (r == 0) {
2086                 gid_t gid;
2087
2088                 /* Child */
2089
2090                 gid = user_record_gid(h->record);
2091                 if (setresgid(gid, gid, gid) < 0) {
2092                         log_error_errno(errno, "Failed to change GID to " GID_FMT ": %m", gid);
2093                         _exit(EXIT_FAILURE);
2094                 }
2095
2096                 if (setgroups(0, NULL) < 0) {
2097                         log_error_errno(errno, "Failed to reset auxiliary groups list: %m");
2098                         _exit(EXIT_FAILURE);
2099                 }
2100
2101                 if (setresuid(h->uid, h->uid, h->uid) < 0) {
2102                         log_error_errno(errno, "Failed to change UID to " UID_FMT ": %m", h->uid);
2103                         _exit(EXIT_FAILURE);
2104                 }
2105
2106                 if (kill(-1, SIGKILL) < 0) {
2107                         log_error_errno(errno, "Failed to kill all processes of UID " UID_FMT ": %m", h->uid);
2108                         _exit(EXIT_FAILURE);
2109                 }
2110
2111                 _exit(EXIT_SUCCESS);
2112         }
2113
2114         /* Let's also kill everything in the user's slice */
2115         if (asprintf(&unit, "user-" UID_FMT ".slice", h->uid) < 0)
2116                 return log_oom();
2117
2118         r = sd_bus_call_method(
2119                         h->manager->bus,
2120                         "org.freedesktop.systemd1",
2121                         "/org/freedesktop/systemd1",
2122                         "org.freedesktop.systemd1.Manager",
2123                         "KillUnit",
2124                         &error,
2125                         NULL,
2126                         "ssi", unit, "all", SIGKILL);
2127         if (r < 0)
2128                 log_full_errno(sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ? LOG_DEBUG : LOG_WARNING,
2129                                r, "Failed to kill login processes of user, ignoring: %s", bus_error_message(&error, r));
2130
2131         return 1;
2132 }
2133
2134 static int home_get_disk_status_luks(
2135                 Home *h,
2136                 HomeState state,
2137                 uint64_t *ret_disk_size,
2138                 uint64_t *ret_disk_usage,
2139                 uint64_t *ret_disk_free,
2140                 uint64_t *ret_disk_ceiling,
2141                 uint64_t *ret_disk_floor,
2142                 statfs_f_type_t *ret_fstype,
2143                 mode_t *ret_access_mode) {
2144
2145         uint64_t disk_size = UINT64_MAX, disk_usage = UINT64_MAX, disk_free = UINT64_MAX,
2146                 disk_ceiling = UINT64_MAX, disk_floor = UINT64_MAX,
2147                 stat_used = UINT64_MAX, fs_size = UINT64_MAX, header_size = 0;
2148         mode_t access_mode = MODE_INVALID;
2149         statfs_f_type_t fstype = 0;
2150         struct statfs sfs;
2151         struct stat st;
2152         const char *hd;
2153         int r;
2154
2155         assert(h);
2156
2157         if (state != HOME_ABSENT) {
2158                 const char *ip;
2159
2160                 ip = user_record_image_path(h->record);
2161                 if (ip) {
2162                         if (stat(ip, &st) < 0)
2163                                 log_debug_errno(errno, "Failed to stat() %s, ignoring: %m", ip);
2164                         else if (S_ISREG(st.st_mode)) {
2165                                 _cleanup_free_ char *parent = NULL;
2166
2167                                 disk_size = st.st_size;
2168                                 stat_used = st.st_blocks * 512;
2169
2170                                 r = path_extract_directory(ip, &parent);
2171                                 if (r < 0)
2172                                         return log_error_errno(r, "Failed to extract parent directory from image path '%s': %m", ip);
2173
2174                                 if (statfs(parent, &sfs) < 0)
2175                                         log_debug_errno(errno, "Failed to statfs() %s, ignoring: %m", parent);
2176                                 else
2177                                         disk_ceiling = stat_used + sfs.f_bsize * sfs.f_bavail;
2178
2179                         } else if (S_ISBLK(st.st_mode)) {
2180                                 _cleanup_free_ char *szbuf = NULL;
2181                                 char p[SYS_BLOCK_PATH_MAX("/size")];
2182
2183                                 /* Let's read the size off sysfs, so that we don't have to open the device */
2184                                 xsprintf_sys_block_path(p, "/size", st.st_rdev);
2185                                 r = read_one_line_file(p, &szbuf);
2186                                 if (r < 0)
2187                                         log_debug_errno(r, "Failed to read %s, ignoring: %m", p);
2188                                 else {
2189                                         uint64_t sz;
2190
2191                                         r = safe_atou64(szbuf, &sz);
2192                                         if (r < 0)
2193                                                 log_debug_errno(r, "Failed to parse %s, ignoring: %s", p, szbuf);
2194                                         else
2195                                                 disk_size = sz * 512;
2196                                 }
2197                         } else
2198                                 log_debug("Image path is not a block device or regular file, not able to acquire size.");
2199                 }
2200         }
2201
2202         if (!HOME_STATE_IS_ACTIVE(state))
2203                 goto finish;
2204
2205         hd = user_record_home_directory(h->record);
2206         if (!hd)
2207                 goto finish;
2208
2209         if (stat(hd, &st) < 0) {
2210                 log_debug_errno(errno, "Failed to stat() %s, ignoring: %m", hd);
2211                 goto finish;
2212         }
2213
2214         r = stat_verify_directory(&st);
2215         if (r < 0) {
2216                 log_debug_errno(r, "Home directory %s is not a directory, ignoring: %m", hd);
2217                 goto finish;
2218         }
2219
2220         access_mode = st.st_mode & 07777;
2221
2222         if (statfs(hd, &sfs) < 0) {
2223                 log_debug_errno(errno, "Failed to statfs() %s, ignoring: %m", hd);
2224                 goto finish;
2225         }
2226
2227         fstype = sfs.f_type;
2228
2229         disk_free = sfs.f_bsize * sfs.f_bavail;
2230         fs_size = sfs.f_bsize * sfs.f_blocks;
2231         if (disk_size != UINT64_MAX && disk_size > fs_size)
2232                 header_size = disk_size - fs_size;
2233
2234         /* We take a perspective from the user here (as opposed to from the host): the used disk space is the
2235          * difference from the limit and what's free. This makes a difference if sparse mode is not used: in
2236          * that case the image is pre-allocated and thus appears all used from the host PoV but is not used
2237          * up at all yet from the user's PoV.
2238          *
2239          * That said, we use the stat() reported loopback file size as upper boundary: our footprint can
2240          * never be larger than what we take up on the lowest layers. */
2241
2242         if (disk_size != UINT64_MAX && disk_size > disk_free) {
2243                 disk_usage = disk_size - disk_free;
2244
2245                 if (stat_used != UINT64_MAX && disk_usage > stat_used)
2246                         disk_usage = stat_used;
2247         } else
2248                 disk_usage = stat_used;
2249
2250         /* If we have the magic, determine floor preferably by magic */
2251         disk_floor = minimal_size_by_fs_magic(sfs.f_type) + header_size;
2252
2253 finish:
2254         /* If we don't know the magic, go by file system name */
2255         if (disk_floor == UINT64_MAX)
2256                 disk_floor = minimal_size_by_fs_name(user_record_file_system_type(h->record));
2257
2258         if (ret_disk_size)
2259                 *ret_disk_size = disk_size;
2260         if (ret_disk_usage)
2261                 *ret_disk_usage = disk_usage;
2262         if (ret_disk_free)
2263                 *ret_disk_free = disk_free;
2264         if (ret_disk_ceiling)
2265                 *ret_disk_ceiling = disk_ceiling;
2266         if (ret_disk_floor)
2267                 *ret_disk_floor = disk_floor;
2268         if (ret_fstype)
2269                 *ret_fstype = fstype;
2270         if (ret_access_mode)
2271                 *ret_access_mode = access_mode;
2272
2273         return 0;
2274 }
2275
2276 static int home_get_disk_status_directory(
2277                 Home *h,
2278                 HomeState state,
2279                 uint64_t *ret_disk_size,
2280                 uint64_t *ret_disk_usage,
2281                 uint64_t *ret_disk_free,
2282                 uint64_t *ret_disk_ceiling,
2283                 uint64_t *ret_disk_floor,
2284                 statfs_f_type_t *ret_fstype,
2285                 mode_t *ret_access_mode) {
2286
2287         uint64_t disk_size = UINT64_MAX, disk_usage = UINT64_MAX, disk_free = UINT64_MAX,
2288                 disk_ceiling = UINT64_MAX, disk_floor = UINT64_MAX;
2289         mode_t access_mode = MODE_INVALID;
2290         statfs_f_type_t fstype = 0;
2291         struct statfs sfs;
2292         struct dqblk req;
2293         const char *path = NULL;
2294         int r;
2295
2296         assert(h);
2297
2298         if (HOME_STATE_IS_ACTIVE(state))
2299                 path = user_record_home_directory(h->record);
2300
2301         if (!path) {
2302                 if (state == HOME_ABSENT)
2303                         goto finish;
2304
2305                 path = user_record_image_path(h->record);
2306         }
2307
2308         if (!path)
2309                 goto finish;
2310
2311         if (statfs(path, &sfs) < 0)
2312                 log_debug_errno(errno, "Failed to statfs() %s, ignoring: %m", path);
2313         else {
2314                 disk_free = sfs.f_bsize * sfs.f_bavail;
2315                 disk_size = sfs.f_bsize * sfs.f_blocks;
2316
2317                 /* We don't initialize disk_usage from statfs() data here, since the device is likely not used
2318                  * by us alone, and disk_usage should only reflect our own use. */
2319
2320                 fstype = sfs.f_type;
2321         }
2322
2323         if (IN_SET(h->record->storage, USER_CLASSIC, USER_DIRECTORY, USER_SUBVOLUME)) {
2324
2325                 r = btrfs_is_subvol(path);
2326                 if (r < 0)
2327                         log_debug_errno(r, "Failed to determine whether %s is a btrfs subvolume: %m", path);
2328                 else if (r > 0) {
2329                         BtrfsQuotaInfo qi;
2330
2331                         r = btrfs_subvol_get_subtree_quota(path, 0, &qi);
2332                         if (r < 0)
2333                                 log_debug_errno(r, "Failed to query btrfs subtree quota, ignoring: %m");
2334                         else {
2335                                 disk_usage = qi.referenced;
2336
2337                                 if (disk_free != UINT64_MAX) {
2338                                         disk_ceiling = qi.referenced + disk_free;
2339
2340                                         if (disk_size != UINT64_MAX && disk_ceiling > disk_size)
2341                                                 disk_ceiling = disk_size;
2342                                 }
2343
2344                                 if (qi.referenced_max != UINT64_MAX) {
2345                                         if (disk_size != UINT64_MAX)
2346                                                 disk_size = MIN(qi.referenced_max, disk_size);
2347                                         else
2348                                                 disk_size = qi.referenced_max;
2349                                 }
2350
2351                                 if (disk_size != UINT64_MAX) {
2352                                         if (disk_size > disk_usage)
2353                                                 disk_free = disk_size - disk_usage;
2354                                         else
2355                                                 disk_free = 0;
2356                                 }
2357                         }
2358
2359                         goto finish;
2360                 }
2361         }
2362
2363         if (IN_SET(h->record->storage, USER_CLASSIC, USER_DIRECTORY, USER_FSCRYPT)) {
2364                 r = quotactl_path(QCMD_FIXED(Q_GETQUOTA, USRQUOTA), path, h->uid, &req);
2365                 if (r < 0) {
2366                         if (ERRNO_IS_NOT_SUPPORTED(r)) {
2367                                 log_debug_errno(r, "No UID quota support on %s.", path);
2368                                 goto finish;
2369                         }
2370
2371                         if (r != -ESRCH) {
2372                                 log_debug_errno(r, "Failed to query disk quota for UID " UID_FMT ": %m", h->uid);
2373                                 goto finish;
2374                         }
2375
2376                         disk_usage = 0; /* No record of this user? then nothing was used */
2377                 } else {
2378                         if (FLAGS_SET(req.dqb_valid, QIF_SPACE) && disk_free != UINT64_MAX) {
2379                                 disk_ceiling = req.dqb_curspace + disk_free;
2380
2381                                 if (disk_size != UINT64_MAX && disk_ceiling > disk_size)
2382                                         disk_ceiling = disk_size;
2383                         }
2384
2385                         if (FLAGS_SET(req.dqb_valid, QIF_BLIMITS)) {
2386                                 uint64_t q;
2387
2388                                 /* Take the minimum of the quota and the available disk space here */
2389                                 q = req.dqb_bhardlimit * QIF_DQBLKSIZE;
2390                                 if (disk_size != UINT64_MAX)
2391                                         disk_size = MIN(disk_size, q);
2392                                 else
2393                                         disk_size = q;
2394                         }
2395                         if (FLAGS_SET(req.dqb_valid, QIF_SPACE)) {
2396                                 disk_usage = req.dqb_curspace;
2397
2398                                 if (disk_size != UINT64_MAX) {
2399                                         if (disk_size > disk_usage)
2400                                                 disk_free = disk_size - disk_usage;
2401                                         else
2402                                                 disk_free = 0;
2403                                 }
2404                         }
2405                 }
2406         }
2407
2408 finish:
2409         if (ret_disk_size)
2410                 *ret_disk_size = disk_size;
2411         if (ret_disk_usage)
2412                 *ret_disk_usage = disk_usage;
2413         if (ret_disk_free)
2414                 *ret_disk_free = disk_free;
2415         if (ret_disk_ceiling)
2416                 *ret_disk_ceiling = disk_ceiling;
2417         if (ret_disk_floor)
2418                 *ret_disk_floor = disk_floor;
2419         if (ret_fstype)
2420                 *ret_fstype = fstype;
2421         if (ret_access_mode)
2422                 *ret_access_mode = access_mode;
2423
2424         return 0;
2425 }
2426
2427 static int home_get_disk_status_internal(
2428                 Home *h,
2429                 HomeState state,
2430                 uint64_t *ret_disk_size,
2431                 uint64_t *ret_disk_usage,
2432                 uint64_t *ret_disk_free,
2433                 uint64_t *ret_disk_ceiling,
2434                 uint64_t *ret_disk_floor,
2435                 statfs_f_type_t *ret_fstype,
2436                 mode_t *ret_access_mode) {
2437
2438         assert(h);
2439         assert(h->record);
2440
2441         switch (h->record->storage) {
2442
2443         case USER_LUKS:
2444                 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);
2445
2446         case USER_CLASSIC:
2447         case USER_DIRECTORY:
2448         case USER_SUBVOLUME:
2449         case USER_FSCRYPT:
2450         case USER_CIFS:
2451                 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);
2452
2453         default:
2454                 /* don't know */
2455
2456                 if (ret_disk_size)
2457                         *ret_disk_size = UINT64_MAX;
2458                 if (ret_disk_usage)
2459                         *ret_disk_usage = UINT64_MAX;
2460                 if (ret_disk_free)
2461                         *ret_disk_free = UINT64_MAX;
2462                 if (ret_disk_ceiling)
2463                         *ret_disk_ceiling = UINT64_MAX;
2464                 if (ret_disk_floor)
2465                         *ret_disk_floor = UINT64_MAX;
2466                 if (ret_fstype)
2467                         *ret_fstype = 0;
2468                 if (ret_access_mode)
2469                         *ret_access_mode = MODE_INVALID;
2470
2471                 return 0;
2472         }
2473 }
2474
2475 int home_get_disk_status(
2476                 Home *h,
2477                 uint64_t *ret_disk_size,
2478                 uint64_t *ret_disk_usage,
2479                 uint64_t *ret_disk_free,
2480                 uint64_t *ret_disk_ceiling,
2481                 uint64_t *ret_disk_floor,
2482                 statfs_f_type_t *ret_fstype,
2483                 mode_t *ret_access_mode) {
2484
2485         assert(h);
2486
2487         return home_get_disk_status_internal(
2488                         h,
2489                         home_get_state(h),
2490                         ret_disk_size,
2491                         ret_disk_usage,
2492                         ret_disk_free,
2493                         ret_disk_ceiling,
2494                         ret_disk_floor,
2495                         ret_fstype,
2496                         ret_access_mode);
2497 }
2498
2499 int home_augment_status(
2500                 Home *h,
2501                 UserRecordLoadFlags flags,
2502                 UserRecord **ret) {
2503
2504         uint64_t disk_size = UINT64_MAX, disk_usage = UINT64_MAX, disk_free = UINT64_MAX, disk_ceiling = UINT64_MAX, disk_floor = UINT64_MAX;
2505         _cleanup_(json_variant_unrefp) JsonVariant *j = NULL, *v = NULL, *m = NULL, *status = NULL;
2506         _cleanup_(user_record_unrefp) UserRecord *ur = NULL;
2507         statfs_f_type_t magic;
2508         const char *fstype;
2509         mode_t access_mode;
2510         HomeState state;
2511         sd_id128_t id;
2512         int r;
2513
2514         assert(h);
2515         assert(ret);
2516
2517         /* We are supposed to add this, this can't be on hence. */
2518         assert(!FLAGS_SET(flags, USER_RECORD_STRIP_STATUS));
2519
2520         r = sd_id128_get_machine(&id);
2521         if (r < 0)
2522                 return r;
2523
2524         state = home_get_state(h);
2525
2526         r = home_get_disk_status_internal(
2527                         h, state,
2528                         &disk_size,
2529                         &disk_usage,
2530                         &disk_free,
2531                         &disk_ceiling,
2532                         &disk_floor,
2533                         &magic,
2534                         &access_mode);
2535         if (r < 0)
2536                 return r;
2537
2538         fstype = fs_type_to_string(magic);
2539
2540         if (disk_floor == UINT64_MAX || (disk_usage != UINT64_MAX && disk_floor < disk_usage))
2541                 disk_floor = disk_usage;
2542         if (disk_floor == UINT64_MAX || disk_floor < USER_DISK_SIZE_MIN)
2543                 disk_floor = USER_DISK_SIZE_MIN;
2544         if (disk_ceiling == UINT64_MAX || disk_ceiling > USER_DISK_SIZE_MAX)
2545                 disk_ceiling = USER_DISK_SIZE_MAX;
2546
2547         r = json_build(&status,
2548                        JSON_BUILD_OBJECT(
2549                                        JSON_BUILD_PAIR("state", JSON_BUILD_STRING(home_state_to_string(state))),
2550                                        JSON_BUILD_PAIR("service", JSON_BUILD_CONST_STRING("io.systemd.Home")),
2551                                        JSON_BUILD_PAIR_CONDITION(disk_size != UINT64_MAX, "diskSize", JSON_BUILD_UNSIGNED(disk_size)),
2552                                        JSON_BUILD_PAIR_CONDITION(disk_usage != UINT64_MAX, "diskUsage", JSON_BUILD_UNSIGNED(disk_usage)),
2553                                        JSON_BUILD_PAIR_CONDITION(disk_free != UINT64_MAX, "diskFree", JSON_BUILD_UNSIGNED(disk_free)),
2554                                        JSON_BUILD_PAIR_CONDITION(disk_ceiling != UINT64_MAX, "diskCeiling", JSON_BUILD_UNSIGNED(disk_ceiling)),
2555                                        JSON_BUILD_PAIR_CONDITION(disk_floor != UINT64_MAX, "diskFloor", JSON_BUILD_UNSIGNED(disk_floor)),
2556                                        JSON_BUILD_PAIR_CONDITION(h->signed_locally >= 0, "signedLocally", JSON_BUILD_BOOLEAN(h->signed_locally)),
2557                                        JSON_BUILD_PAIR_CONDITION(fstype, "fileSystemType", JSON_BUILD_STRING(fstype)),
2558                                        JSON_BUILD_PAIR_CONDITION(access_mode != MODE_INVALID, "accessMode", JSON_BUILD_UNSIGNED(access_mode))
2559                        ));
2560         if (r < 0)
2561                 return r;
2562
2563         j = json_variant_ref(h->record->json);
2564         v = json_variant_ref(json_variant_by_key(j, "status"));
2565         m = json_variant_ref(json_variant_by_key(v, SD_ID128_TO_STRING(id)));
2566
2567         r = json_variant_filter(&m, STRV_MAKE("diskSize", "diskUsage", "diskFree", "diskCeiling", "diskFloor", "signedLocally"));
2568         if (r < 0)
2569                 return r;
2570
2571         r = json_variant_merge(&m, status);
2572         if (r < 0)
2573                 return r;
2574
2575         r = json_variant_set_field(&v, SD_ID128_TO_STRING(id), m);
2576         if (r < 0)
2577                 return r;
2578
2579         r = json_variant_set_field(&j, "status", v);
2580         if (r < 0)
2581                 return r;
2582
2583         ur = user_record_new();
2584         if (!ur)
2585                 return -ENOMEM;
2586
2587         r = user_record_load(ur, j, flags);
2588         if (r < 0)
2589                 return r;
2590
2591         ur->incomplete =
2592                 FLAGS_SET(h->record->mask, USER_RECORD_PRIVILEGED) &&
2593                 !FLAGS_SET(ur->mask, USER_RECORD_PRIVILEGED);
2594
2595         *ret = TAKE_PTR(ur);
2596         return 0;
2597 }
2598
2599 static int on_home_ref_eof(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
2600         _cleanup_(operation_unrefp) Operation *o = NULL;
2601         Home *h = ASSERT_PTR(userdata);
2602
2603         assert(s);
2604
2605         if (h->ref_event_source_please_suspend == s)
2606                 h->ref_event_source_please_suspend = sd_event_source_disable_unref(h->ref_event_source_please_suspend);
2607
2608         if (h->ref_event_source_dont_suspend == s)
2609                 h->ref_event_source_dont_suspend = sd_event_source_disable_unref(h->ref_event_source_dont_suspend);
2610
2611         if (h->ref_event_source_dont_suspend || h->ref_event_source_please_suspend)
2612                 return 0;
2613
2614         log_info("Got notification that all sessions of user %s ended, deactivating automatically.", h->user_name);
2615
2616         o = operation_new(OPERATION_PIPE_EOF, NULL);
2617         if (!o) {
2618                 log_oom();
2619                 return 0;
2620         }
2621
2622         home_schedule_operation(h, o, NULL);
2623         return 0;
2624 }
2625
2626 int home_create_fifo(Home *h, bool please_suspend) {
2627         _cleanup_close_ int ret_fd = -EBADF;
2628         sd_event_source **ss;
2629         const char *fn, *suffix;
2630         int r;
2631
2632         assert(h);
2633
2634         if (please_suspend) {
2635                 suffix = ".please-suspend";
2636                 ss = &h->ref_event_source_please_suspend;
2637         } else {
2638                 suffix = ".dont-suspend";
2639                 ss = &h->ref_event_source_dont_suspend;
2640         }
2641
2642         fn = strjoina("/run/systemd/home/", h->user_name, suffix);
2643
2644         if (!*ss) {
2645                 _cleanup_close_ int ref_fd = -EBADF;
2646
2647                 (void) mkdir("/run/systemd/home/", 0755);
2648                 if (mkfifo(fn, 0600) < 0 && errno != EEXIST)
2649                         return log_error_errno(errno, "Failed to create FIFO %s: %m", fn);
2650
2651                 ref_fd = open(fn, O_RDONLY|O_CLOEXEC|O_NONBLOCK);
2652                 if (ref_fd < 0)
2653                         return log_error_errno(errno, "Failed to open FIFO %s for reading: %m", fn);
2654
2655                 r = sd_event_add_io(h->manager->event, ss, ref_fd, 0, on_home_ref_eof, h);
2656                 if (r < 0)
2657                         return log_error_errno(r, "Failed to allocate reference FIFO event source: %m");
2658
2659                 (void) sd_event_source_set_description(*ss, "acquire-ref");
2660
2661                 r = sd_event_source_set_priority(*ss, SD_EVENT_PRIORITY_IDLE-1);
2662                 if (r < 0)
2663                         return r;
2664
2665                 r = sd_event_source_set_io_fd_own(*ss, true);
2666                 if (r < 0)
2667                         return log_error_errno(r, "Failed to pass ownership of FIFO event fd to event source: %m");
2668
2669                 TAKE_FD(ref_fd);
2670         }
2671
2672         ret_fd = open(fn, O_WRONLY|O_CLOEXEC|O_NONBLOCK);
2673         if (ret_fd < 0)
2674                 return log_error_errno(errno, "Failed to open FIFO %s for writing: %m", fn);
2675
2676         return TAKE_FD(ret_fd);
2677 }
2678
2679 static int home_dispatch_acquire(Home *h, Operation *o) {
2680         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2681         int (*call)(Home *h, UserRecord *secret, HomeState for_state, sd_bus_error *error) = NULL;
2682         HomeState for_state;
2683         int r;
2684
2685         assert(h);
2686         assert(o);
2687         assert(o->type == OPERATION_ACQUIRE);
2688
2689         assert(!h->current_operation);
2690
2691         switch (home_get_state(h)) {
2692
2693         case HOME_UNFIXATED:
2694                 for_state = HOME_FIXATING_FOR_ACQUIRE;
2695                 call = home_fixate_internal;
2696                 break;
2697
2698         case HOME_ABSENT:
2699                 r = sd_bus_error_setf(&error, BUS_ERROR_HOME_ABSENT,
2700                                       "Home %s is currently missing or not plugged in.", h->user_name);
2701                 goto check;
2702
2703         case HOME_INACTIVE:
2704         case HOME_DIRTY:
2705                 for_state = HOME_ACTIVATING_FOR_ACQUIRE;
2706                 call = home_activate_internal;
2707                 break;
2708
2709         case HOME_ACTIVE:
2710         case HOME_LINGERING:
2711                 for_state = HOME_AUTHENTICATING_FOR_ACQUIRE;
2712                 call = home_authenticate_internal;
2713                 break;
2714
2715         case HOME_LOCKED:
2716                 for_state = HOME_UNLOCKING_FOR_ACQUIRE;
2717                 call = home_unlock_internal;
2718                 break;
2719
2720         default:
2721                 /* All other cases means we are currently executing an operation, which means the job remains
2722                  * pending. */
2723                 return 0;
2724         }
2725
2726         r = home_ratelimit(h, &error);
2727         if (r >= 0)
2728                 r = call(h, o->secret, for_state, &error);
2729
2730  check:
2731         if (r != 0) /* failure or completed */
2732                 operation_result(o, r, &error);
2733         else /* ongoing */
2734                 h->current_operation = operation_ref(o);
2735
2736         return 1;
2737 }
2738
2739 static int home_dispatch_release(Home *h, Operation *o) {
2740         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2741         int r;
2742
2743         assert(h);
2744         assert(o);
2745         assert(o->type == OPERATION_RELEASE);
2746
2747         if (h->ref_event_source_dont_suspend || h->ref_event_source_please_suspend)
2748                 /* If there's now a reference again, then let's abort the release attempt */
2749                 r = sd_bus_error_setf(&error, BUS_ERROR_HOME_BUSY, "Home %s is currently referenced.", h->user_name);
2750         else {
2751                 switch (home_get_state(h)) {
2752
2753                 case HOME_UNFIXATED:
2754                 case HOME_ABSENT:
2755                 case HOME_INACTIVE:
2756                 case HOME_DIRTY:
2757                         r = 1; /* done */
2758                         break;
2759
2760                 case HOME_LOCKED:
2761                         r = sd_bus_error_setf(&error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
2762                         break;
2763
2764                 case HOME_ACTIVE:
2765                 case HOME_LINGERING:
2766                         r = home_deactivate_internal(h, false, &error);
2767                         break;
2768
2769                 default:
2770                         /* All other cases means we are currently executing an operation, which means the job remains
2771                          * pending. */
2772                         return 0;
2773                 }
2774         }
2775
2776         assert(!h->current_operation);
2777
2778         if (r != 0) /* failure or completed */
2779                 operation_result(o, r, &error);
2780         else /* ongoing */
2781                 h->current_operation = operation_ref(o);
2782
2783         return 1;
2784 }
2785
2786 static int home_dispatch_lock_all(Home *h, Operation *o) {
2787         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2788         int r;
2789
2790         assert(h);
2791         assert(o);
2792         assert(o->type == OPERATION_LOCK_ALL);
2793
2794         switch (home_get_state(h)) {
2795
2796         case HOME_UNFIXATED:
2797         case HOME_ABSENT:
2798         case HOME_INACTIVE:
2799         case HOME_DIRTY:
2800                 log_info("Home %s is not active, no locking necessary.", h->user_name);
2801                 r = 1; /* done */
2802                 break;
2803
2804         case HOME_LOCKED:
2805                 log_info("Home %s is already locked.", h->user_name);
2806                 r = 1; /* done */
2807                 break;
2808
2809         case HOME_ACTIVE:
2810         case HOME_LINGERING:
2811                 log_info("Locking home %s.", h->user_name);
2812                 r = home_lock(h, &error);
2813                 break;
2814
2815         default:
2816                 /* All other cases means we are currently executing an operation, which means the job remains
2817                  * pending. */
2818                 return 0;
2819         }
2820
2821         assert(!h->current_operation);
2822
2823         if (r != 0) /* failure or completed */
2824                 operation_result(o, r, &error);
2825         else /* ongoing */
2826                 h->current_operation = operation_ref(o);
2827
2828         return 1;
2829 }
2830
2831 static int home_dispatch_deactivate_all(Home *h, Operation *o) {
2832         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2833         int r;
2834
2835         assert(h);
2836         assert(o);
2837         assert(o->type == OPERATION_DEACTIVATE_ALL);
2838
2839         switch (home_get_state(h)) {
2840
2841         case HOME_UNFIXATED:
2842         case HOME_ABSENT:
2843         case HOME_INACTIVE:
2844         case HOME_DIRTY:
2845                 log_info("Home %s is already deactivated.", h->user_name);
2846                 r = 1; /* done */
2847                 break;
2848
2849         case HOME_LOCKED:
2850                 log_info("Home %s is currently locked, not deactivating.", h->user_name);
2851                 r = 1; /* done */
2852                 break;
2853
2854         case HOME_ACTIVE:
2855         case HOME_LINGERING:
2856                 log_info("Deactivating home %s.", h->user_name);
2857                 r = home_deactivate_internal(h, false, &error);
2858                 break;
2859
2860         default:
2861                 /* All other cases means we are currently executing an operation, which means the job remains
2862                  * pending. */
2863                 return 0;
2864         }
2865
2866         assert(!h->current_operation);
2867
2868         if (r != 0) /* failure or completed */
2869                 operation_result(o, r, &error);
2870         else /* ongoing */
2871                 h->current_operation = operation_ref(o);
2872
2873         return 1;
2874 }
2875
2876 static int home_dispatch_pipe_eof(Home *h, Operation *o) {
2877         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2878         int r;
2879
2880         assert(h);
2881         assert(o);
2882         assert(o->type == OPERATION_PIPE_EOF);
2883
2884         if (h->ref_event_source_please_suspend || h->ref_event_source_dont_suspend)
2885                 return 1; /* Hmm, there's a reference again, let's cancel this */
2886
2887         switch (home_get_state(h)) {
2888
2889         case HOME_UNFIXATED:
2890         case HOME_ABSENT:
2891         case HOME_INACTIVE:
2892         case HOME_DIRTY:
2893                 log_info("Home %s already deactivated, no automatic deactivation needed.", h->user_name);
2894                 break;
2895
2896         case HOME_DEACTIVATING:
2897                 log_info("Home %s is already being deactivated, automatic deactivated unnecessary.", h->user_name);
2898                 break;
2899
2900         case HOME_ACTIVE:
2901         case HOME_LINGERING:
2902                 r = home_deactivate_internal(h, false, &error);
2903                 if (r < 0)
2904                         log_warning_errno(r, "Failed to deactivate %s, ignoring: %s", h->user_name, bus_error_message(&error, r));
2905                 break;
2906
2907         case HOME_LOCKED:
2908         default:
2909                 /* If the device is locked or any operation is being executed, let's leave this pending */
2910                 return 0;
2911         }
2912
2913         /* Note that we don't call operation_fail() or operation_success() here, because this kind of
2914          * operation has no message associated with it, and thus there's no need to propagate success. */
2915
2916         assert(!o->message);
2917         return 1;
2918 }
2919
2920 static int home_dispatch_deactivate_force(Home *h, Operation *o) {
2921         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2922         int r;
2923
2924         assert(h);
2925         assert(o);
2926         assert(o->type == OPERATION_DEACTIVATE_FORCE);
2927
2928         switch (home_get_state(h)) {
2929
2930         case HOME_UNFIXATED:
2931         case HOME_ABSENT:
2932         case HOME_INACTIVE:
2933         case HOME_DIRTY:
2934                 log_debug("Home %s already deactivated, no forced deactivation due to unplug needed.", h->user_name);
2935                 break;
2936
2937         case HOME_DEACTIVATING:
2938                 log_debug("Home %s is already being deactivated, forced deactivation due to unplug unnecessary.", h->user_name);
2939                 break;
2940
2941         case HOME_ACTIVE:
2942         case HOME_LOCKED:
2943         case HOME_LINGERING:
2944                 r = home_deactivate_internal(h, true, &error);
2945                 if (r < 0)
2946                         log_warning_errno(r, "Failed to forcibly deactivate %s, ignoring: %s", h->user_name, bus_error_message(&error, r));
2947                 break;
2948
2949         default:
2950                 /* If any operation is being executed, let's leave this pending */
2951                 return 0;
2952         }
2953
2954         /* Note that we don't call operation_fail() or operation_success() here, because this kind of
2955          * operation has no message associated with it, and thus there's no need to propagate success. */
2956
2957         assert(!o->message);
2958         return 1;
2959 }
2960
2961 static int on_pending(sd_event_source *s, void *userdata) {
2962         Home *h = ASSERT_PTR(userdata);
2963         Operation *o;
2964         int r;
2965
2966         assert(s);
2967
2968         o = ordered_set_first(h->pending_operations);
2969         if (o) {
2970                 static int (* const operation_table[_OPERATION_MAX])(Home *h, Operation *o) = {
2971                         [OPERATION_ACQUIRE]          = home_dispatch_acquire,
2972                         [OPERATION_RELEASE]          = home_dispatch_release,
2973                         [OPERATION_LOCK_ALL]         = home_dispatch_lock_all,
2974                         [OPERATION_DEACTIVATE_ALL]   = home_dispatch_deactivate_all,
2975                         [OPERATION_PIPE_EOF]         = home_dispatch_pipe_eof,
2976                         [OPERATION_DEACTIVATE_FORCE] = home_dispatch_deactivate_force,
2977                 };
2978
2979                 assert(operation_table[o->type]);
2980                 r = operation_table[o->type](h, o);
2981                 if (r != 0) {
2982                         /* The operation completed, let's remove it from the pending list, and exit while
2983                          * leaving the event source enabled as it is. */
2984                         assert_se(ordered_set_remove(h->pending_operations, o) == o);
2985                         operation_unref(o);
2986                         return 0;
2987                 }
2988         }
2989
2990         /* Nothing to do anymore, let's turn off this event source */
2991         r = sd_event_source_set_enabled(s, SD_EVENT_OFF);
2992         if (r < 0)
2993                 return log_error_errno(r, "Failed to disable event source: %m");
2994
2995         /* No operations pending anymore, maybe this is a good time to trigger a rebalancing */
2996         manager_reschedule_rebalance(h->manager);
2997         return 0;
2998 }
2999
3000 int home_schedule_operation(Home *h, Operation *o, sd_bus_error *error) {
3001         int r;
3002
3003         assert(h);
3004
3005         if (o) {
3006                 if (ordered_set_size(h->pending_operations) >= PENDING_OPERATIONS_MAX)
3007                         return sd_bus_error_set(error, BUS_ERROR_TOO_MANY_OPERATIONS, "Too many client operations requested");
3008
3009                 r = ordered_set_ensure_put(&h->pending_operations, &operation_hash_ops, o);
3010                 if (r < 0)
3011                         return r;
3012
3013                 operation_ref(o);
3014         }
3015
3016         if (!h->pending_event_source) {
3017                 r = sd_event_add_defer(h->manager->event, &h->pending_event_source, on_pending, h);
3018                 if (r < 0)
3019                         return log_error_errno(r, "Failed to allocate pending defer event source: %m");
3020
3021                 (void) sd_event_source_set_description(h->pending_event_source, "pending");
3022
3023                 r = sd_event_source_set_priority(h->pending_event_source, SD_EVENT_PRIORITY_IDLE);
3024                 if (r < 0)
3025                         return r;
3026         }
3027
3028         r = sd_event_source_set_enabled(h->pending_event_source, SD_EVENT_ON);
3029         if (r < 0)
3030                 return log_error_errno(r, "Failed to trigger pending event source: %m");
3031
3032         return 0;
3033 }
3034
3035 static int home_get_image_path_seat(Home *h, char **ret) {
3036         _cleanup_(sd_device_unrefp) sd_device *d = NULL;
3037         _cleanup_free_ char *c = NULL;
3038         const char *ip, *seat;
3039         struct stat st;
3040         int r;
3041
3042         assert(h);
3043
3044         if (user_record_storage(h->record) != USER_LUKS)
3045                 return -ENXIO;
3046
3047         ip = user_record_image_path(h->record);
3048         if (!ip)
3049                 return -ENXIO;
3050
3051         if (!path_startswith(ip, "/dev/"))
3052                 return -ENXIO;
3053
3054         if (stat(ip, &st) < 0)
3055                 return -errno;
3056
3057         if (!S_ISBLK(st.st_mode))
3058                 return -ENOTBLK;
3059
3060         r = sd_device_new_from_stat_rdev(&d, &st);
3061         if (r < 0)
3062                 return r;
3063
3064         r = sd_device_get_property_value(d, "ID_SEAT", &seat);
3065         if (r == -ENOENT) /* no property means seat0 */
3066                 seat = "seat0";
3067         else if (r < 0)
3068                 return r;
3069
3070         c = strdup(seat);
3071         if (!c)
3072                 return -ENOMEM;
3073
3074         *ret = TAKE_PTR(c);
3075         return 0;
3076 }
3077
3078 int home_auto_login(Home *h, char ***ret_seats) {
3079         _cleanup_free_ char *seat = NULL, *seat2 = NULL;
3080
3081         assert(h);
3082         assert(ret_seats);
3083
3084         (void) home_get_image_path_seat(h, &seat);
3085
3086         if (h->record->auto_login > 0 && !streq_ptr(seat, "seat0")) {
3087                 /* For now, when the auto-login boolean is set for a user, let's make it mean
3088                  * "seat0". Eventually we can extend the concept and allow configuration of any kind of seat,
3089                  * but let's keep simple initially, most likely the feature is interesting on single-user
3090                  * systems anyway, only.
3091                  *
3092                  * We filter out users marked for auto-login in we know for sure their home directory is
3093                  * absent. */
3094
3095                 if (user_record_test_image_path(h->record) != USER_TEST_ABSENT) {
3096                         seat2 = strdup("seat0");
3097                         if (!seat2)
3098                                 return -ENOMEM;
3099                 }
3100         }
3101
3102         if (seat || seat2) {
3103                 _cleanup_strv_free_ char **list = NULL;
3104                 size_t i = 0;
3105
3106                 list = new(char*, 3);
3107                 if (!list)
3108                         return -ENOMEM;
3109
3110                 if (seat)
3111                         list[i++] = TAKE_PTR(seat);
3112                 if (seat2)
3113                         list[i++] = TAKE_PTR(seat2);
3114
3115                 list[i] = NULL;
3116                 *ret_seats = TAKE_PTR(list);
3117                 return 1;
3118         }
3119
3120         *ret_seats = NULL;
3121         return 0;
3122 }
3123
3124 int home_set_current_message(Home *h, sd_bus_message *m) {
3125         assert(h);
3126
3127         if (!m)
3128                 return 0;
3129
3130         if (h->current_operation)
3131                 return -EBUSY;
3132
3133         h->current_operation = operation_new(OPERATION_IMMEDIATE, m);
3134         if (!h->current_operation)
3135                 return -ENOMEM;
3136
3137         return 1;
3138 }
3139
3140 int home_wait_for_worker(Home *h) {
3141         int r;
3142
3143         assert(h);
3144
3145         if (h->worker_pid <= 0)
3146                 return 0;
3147
3148         log_info("Worker process for home %s is still running while exiting. Waiting for it to finish.", h->user_name);
3149
3150         r = wait_for_terminate_with_timeout(h->worker_pid, 30 * USEC_PER_SEC);
3151         if (r == -ETIMEDOUT)
3152                 log_warning_errno(r, "Waiting for worker process for home %s timed out. Ignoring.", h->user_name);
3153         else
3154                 log_warning_errno(r, "Failed to wait for worker process for home %s. Ignoring.", h->user_name);
3155
3156         (void) hashmap_remove_value(h->manager->homes_by_worker_pid, PID_TO_PTR(h->worker_pid), h);
3157         h->worker_pid = 0;
3158         return 1;
3159 }
3160
3161 bool home_shall_rebalance(Home *h) {
3162         HomeState state;
3163
3164         assert(h);
3165
3166         /* Determines if the home directory is a candidate for rebalancing */
3167
3168         if (!user_record_shall_rebalance(h->record))
3169                 return false;
3170
3171         state = home_get_state(h);
3172         if (!HOME_STATE_SHALL_REBALANCE(state))
3173                 return false;
3174
3175         return true;
3176 }
3177
3178 bool home_is_busy(Home *h) {
3179         assert(h);
3180
3181         if (h->current_operation)
3182                 return true;
3183
3184         if (!ordered_set_isempty(h->pending_operations))
3185                 return true;
3186
3187         return HOME_STATE_IS_EXECUTING_OPERATION(home_get_state(h));
3188 }
3189
3190 static const char* const home_state_table[_HOME_STATE_MAX] = {
3191         [HOME_UNFIXATED]                   = "unfixated",
3192         [HOME_ABSENT]                      = "absent",
3193         [HOME_INACTIVE]                    = "inactive",
3194         [HOME_DIRTY]                       = "dirty",
3195         [HOME_FIXATING]                    = "fixating",
3196         [HOME_FIXATING_FOR_ACTIVATION]     = "fixating-for-activation",
3197         [HOME_FIXATING_FOR_ACQUIRE]        = "fixating-for-acquire",
3198         [HOME_ACTIVATING]                  = "activating",
3199         [HOME_ACTIVATING_FOR_ACQUIRE]      = "activating-for-acquire",
3200         [HOME_DEACTIVATING]                = "deactivating",
3201         [HOME_ACTIVE]                      = "active",
3202         [HOME_LINGERING]                   = "lingering",
3203         [HOME_LOCKING]                     = "locking",
3204         [HOME_LOCKED]                      = "locked",
3205         [HOME_UNLOCKING]                   = "unlocking",
3206         [HOME_UNLOCKING_FOR_ACQUIRE]       = "unlocking-for-acquire",
3207         [HOME_CREATING]                    = "creating",
3208         [HOME_REMOVING]                    = "removing",
3209         [HOME_UPDATING]                    = "updating",
3210         [HOME_UPDATING_WHILE_ACTIVE]       = "updating-while-active",
3211         [HOME_RESIZING]                    = "resizing",
3212         [HOME_RESIZING_WHILE_ACTIVE]       = "resizing-while-active",
3213         [HOME_PASSWD]                      = "passwd",
3214         [HOME_PASSWD_WHILE_ACTIVE]         = "passwd-while-active",
3215         [HOME_AUTHENTICATING]              = "authenticating",
3216         [HOME_AUTHENTICATING_WHILE_ACTIVE] = "authenticating-while-active",
3217         [HOME_AUTHENTICATING_FOR_ACQUIRE]  = "authenticating-for-acquire",
3218 };
3219
3220 DEFINE_STRING_TABLE_LOOKUP(home_state, HomeState);