src/machine/machined-dbus.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4 #include <string.h>
   5 #include <unistd.h>
   6
   7 #include "sd-id128.h"
   8
   9 #include "alloc-util.h"
  10 #include "btrfs-util.h"
  11 #include "bus-common-errors.h"
  12 #include "bus-util.h"
  13 #include "cgroup-util.h"
  14 #include "fd-util.h"
  15 #include "fileio.h"
  16 #include "format-util.h"
  17 #include "hostname-util.h"
  18 #include "image-dbus.h"
  19 #include "io-util.h"
  20 #include "machine-dbus.h"
  21 #include "machine-image.h"
  22 #include "machine-pool.h"
  23 #include "machined.h"
  24 #include "missing_capability.h"
  25 #include "path-util.h"
  26 #include "process-util.h"
  27 #include "stdio-util.h"
  28 #include "strv.h"
  29 #include "tmpfile-util.h"
  30 #include "unit-name.h"
  31 #include "user-util.h"
  32
  33 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_pool_path, "s", "/var/lib/machines");
  34
  35 static int property_get_pool_usage(
  36                 sd_bus *bus,
  37                 const char *path,
  38                 const char *interface,
  39                 const char *property,
  40                 sd_bus_message *reply,
  41                 void *userdata,
  42                 sd_bus_error *error) {
  43
  44         _cleanup_close_ int fd = -1;
  45         uint64_t usage = (uint64_t) -1;
  46
  47         assert(bus);
  48         assert(reply);
  49
  50         fd = open("/var/lib/machines", O_RDONLY|O_CLOEXEC|O_DIRECTORY);
  51         if (fd >= 0) {
  52                 BtrfsQuotaInfo q;
  53
  54                 if (btrfs_subvol_get_subtree_quota_fd(fd, 0, &q) >= 0)
  55                         usage = q.referenced;
  56         }
  57
  58         return sd_bus_message_append(reply, "t", usage);
  59 }
  60
  61 static int property_get_pool_limit(
  62                 sd_bus *bus,
  63                 const char *path,
  64                 const char *interface,
  65                 const char *property,
  66                 sd_bus_message *reply,
  67                 void *userdata,
  68                 sd_bus_error *error) {
  69
  70         _cleanup_close_ int fd = -1;
  71         uint64_t size = (uint64_t) -1;
  72
  73         assert(bus);
  74         assert(reply);
  75
  76         fd = open("/var/lib/machines", O_RDONLY|O_CLOEXEC|O_DIRECTORY);
  77         if (fd >= 0) {
  78                 BtrfsQuotaInfo q;
  79
  80                 if (btrfs_subvol_get_subtree_quota_fd(fd, 0, &q) >= 0)
  81                         size = q.referenced_max;
  82         }
  83
  84         return sd_bus_message_append(reply, "t", size);
  85 }
  86
  87 static int method_get_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) {
  88         _cleanup_free_ char *p = NULL;
  89         Manager *m = userdata;
  90         Machine *machine;
  91         const char *name;
  92         int r;
  93
  94         assert(message);
  95         assert(m);
  96
  97         r = sd_bus_message_read(message, "s", &name);
  98         if (r < 0)
  99                 return r;
 100
 101         machine = hashmap_get(m->machines, name);
 102         if (!machine)
 103                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_MACHINE, "No machine '%s' known", name);
 104
 105         p = machine_bus_path(machine);
 106         if (!p)
 107                 return -ENOMEM;
 108
 109         return sd_bus_reply_method_return(message, "o", p);
 110 }
 111
 112 static int method_get_image(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 113         _cleanup_free_ char *p = NULL;
 114         Manager *m = userdata;
 115         const char *name;
 116         int r;
 117
 118         assert(message);
 119         assert(m);
 120
 121         r = sd_bus_message_read(message, "s", &name);
 122         if (r < 0)
 123                 return r;
 124
 125         r = image_find(IMAGE_MACHINE, name, NULL);
 126         if (r == -ENOENT)
 127                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_IMAGE, "No image '%s' known", name);
 128         if (r < 0)
 129                 return r;
 130
 131         p = image_bus_path(name);
 132         if (!p)
 133                 return -ENOMEM;
 134
 135         return sd_bus_reply_method_return(message, "o", p);
 136 }
 137
 138 static int method_get_machine_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 139         _cleanup_free_ char *p = NULL;
 140         Manager *m = userdata;
 141         Machine *machine = NULL;
 142         pid_t pid;
 143         int r;
 144
 145         assert(message);
 146         assert(m);
 147
 148         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 149
 150         r = sd_bus_message_read(message, "u", &pid);
 151         if (r < 0)
 152                 return r;
 153
 154         if (pid < 0)
 155                 return -EINVAL;
 156
 157         if (pid == 0) {
 158                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 159
 160                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 161                 if (r < 0)
 162                         return r;
 163
 164                 r = sd_bus_creds_get_pid(creds, &pid);
 165                 if (r < 0)
 166                         return r;
 167         }
 168
 169         r = manager_get_machine_by_pid(m, pid, &machine);
 170         if (r < 0)
 171                 return r;
 172         if (!machine)
 173                 return sd_bus_error_setf(error, BUS_ERROR_NO_MACHINE_FOR_PID, "PID "PID_FMT" does not belong to any known machine", pid);
 174
 175         p = machine_bus_path(machine);
 176         if (!p)
 177                 return -ENOMEM;
 178
 179         return sd_bus_reply_method_return(message, "o", p);
 180 }
 181
 182 static int method_list_machines(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 183         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 184         Manager *m = userdata;
 185         Machine *machine;
 186         Iterator i;
 187         int r;
 188
 189         assert(message);
 190         assert(m);
 191
 192         r = sd_bus_message_new_method_return(message, &reply);
 193         if (r < 0)
 194                 return sd_bus_error_set_errno(error, r);
 195
 196         r = sd_bus_message_open_container(reply, 'a', "(ssso)");
 197         if (r < 0)
 198                 return sd_bus_error_set_errno(error, r);
 199
 200         HASHMAP_FOREACH(machine, m->machines, i) {
 201                 _cleanup_free_ char *p = NULL;
 202
 203                 p = machine_bus_path(machine);
 204                 if (!p)
 205                         return -ENOMEM;
 206
 207                 r = sd_bus_message_append(reply, "(ssso)",
 208                                           machine->name,
 209                                           strempty(machine_class_to_string(machine->class)),
 210                                           machine->service,
 211                                           p);
 212                 if (r < 0)
 213                         return sd_bus_error_set_errno(error, r);
 214         }
 215
 216         r = sd_bus_message_close_container(reply);
 217         if (r < 0)
 218                 return sd_bus_error_set_errno(error, r);
 219
 220         return sd_bus_send(NULL, reply, NULL);
 221 }
 222
 223 static int method_create_or_register_machine(Manager *manager, sd_bus_message *message, bool read_network, Machine **_m, sd_bus_error *error) {
 224         const char *name, *service, *class, *root_directory;
 225         const int32_t *netif = NULL;
 226         MachineClass c;
 227         uint32_t leader;
 228         sd_id128_t id;
 229         const void *v;
 230         Machine *m;
 231         size_t n, n_netif = 0;
 232         int r;
 233
 234         assert(manager);
 235         assert(message);
 236         assert(_m);
 237
 238         r = sd_bus_message_read(message, "s", &name);
 239         if (r < 0)
 240                 return r;
 241         if (!machine_name_is_valid(name))
 242                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid machine name");
 243
 244         r = sd_bus_message_read_array(message, 'y', &v, &n);
 245         if (r < 0)
 246                 return r;
 247         if (n == 0)
 248                 id = SD_ID128_NULL;
 249         else if (n == 16)
 250                 memcpy(&id, v, n);
 251         else
 252                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid machine ID parameter");
 253
 254         r = sd_bus_message_read(message, "ssus", &service, &class, &leader, &root_directory);
 255         if (r < 0)
 256                 return r;
 257
 258         if (read_network) {
 259                 size_t i;
 260
 261                 r = sd_bus_message_read_array(message, 'i', (const void**) &netif, &n_netif);
 262                 if (r < 0)
 263                         return r;
 264
 265                 n_netif /= sizeof(int32_t);
 266
 267                 for (i = 0; i < n_netif; i++) {
 268                         if (netif[i] <= 0)
 269                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid network interface index %i", netif[i]);
 270                 }
 271         }
 272
 273         if (isempty(class))
 274                 c = _MACHINE_CLASS_INVALID;
 275         else {
 276                 c = machine_class_from_string(class);
 277                 if (c < 0)
 278                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid machine class parameter");
 279         }
 280
 281         if (leader == 1)
 282                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 283
 284         if (!isempty(root_directory) && !path_is_absolute(root_directory))
 285                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Root directory must be empty or an absolute path");
 286
 287         if (leader == 0) {
 288                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 289
 290                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 291                 if (r < 0)
 292                         return r;
 293
 294                 assert_cc(sizeof(uint32_t) == sizeof(pid_t));
 295
 296                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 297                 if (r < 0)
 298                         return r;
 299         }
 300
 301         if (hashmap_get(manager->machines, name))
 302                 return sd_bus_error_setf(error, BUS_ERROR_MACHINE_EXISTS, "Machine '%s' already exists", name);
 303
 304         r = manager_add_machine(manager, name, &m);
 305         if (r < 0)
 306                 return r;
 307
 308         m->leader = leader;
 309         m->class = c;
 310         m->id = id;
 311
 312         if (!isempty(service)) {
 313                 m->service = strdup(service);
 314                 if (!m->service) {
 315                         r = -ENOMEM;
 316                         goto fail;
 317                 }
 318         }
 319
 320         if (!isempty(root_directory)) {
 321                 m->root_directory = strdup(root_directory);
 322                 if (!m->root_directory) {
 323                         r = -ENOMEM;
 324                         goto fail;
 325                 }
 326         }
 327
 328         if (n_netif > 0) {
 329                 assert_cc(sizeof(int32_t) == sizeof(int));
 330                 m->netif = memdup(netif, sizeof(int32_t) * n_netif);
 331                 if (!m->netif) {
 332                         r = -ENOMEM;
 333                         goto fail;
 334                 }
 335
 336                 m->n_netif = n_netif;
 337         }
 338
 339         *_m = m;
 340
 341         return 1;
 342
 343 fail:
 344         machine_add_to_gc_queue(m);
 345         return r;
 346 }
 347
 348 static int method_create_machine_internal(sd_bus_message *message, bool read_network, void *userdata, sd_bus_error *error) {
 349         Manager *manager = userdata;
 350         Machine *m = NULL;
 351         int r;
 352
 353         assert(message);
 354         assert(manager);
 355
 356         r = method_create_or_register_machine(manager, message, read_network, &m, error);
 357         if (r < 0)
 358                 return r;
 359
 360         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 361         if (r < 0)
 362                 goto fail;
 363
 364         r = machine_start(m, message, error);
 365         if (r < 0)
 366                 goto fail;
 367
 368         m->create_message = sd_bus_message_ref(message);
 369         return 1;
 370
 371 fail:
 372         machine_add_to_gc_queue(m);
 373         return r;
 374 }
 375
 376 static int method_create_machine_with_network(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 377         return method_create_machine_internal(message, true, userdata, error);
 378 }
 379
 380 static int method_create_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 381         return method_create_machine_internal(message, false, userdata, error);
 382 }
 383
 384 static int method_register_machine_internal(sd_bus_message *message, bool read_network, void *userdata, sd_bus_error *error) {
 385         Manager *manager = userdata;
 386         _cleanup_free_ char *p = NULL;
 387         Machine *m = NULL;
 388         int r;
 389
 390         assert(message);
 391         assert(manager);
 392
 393         r = method_create_or_register_machine(manager, message, read_network, &m, error);
 394         if (r < 0)
 395                 return r;
 396
 397         r = cg_pid_get_unit(m->leader, &m->unit);
 398         if (r < 0) {
 399                 r = sd_bus_error_set_errnof(error, r,
 400                                             "Failed to determine unit of process "PID_FMT" : %m",
 401                                             m->leader);
 402                 goto fail;
 403         }
 404
 405         r = machine_start(m, NULL, error);
 406         if (r < 0)
 407                 goto fail;
 408
 409         p = machine_bus_path(m);
 410         if (!p) {
 411                 r = -ENOMEM;
 412                 goto fail;
 413         }
 414
 415         return sd_bus_reply_method_return(message, "o", p);
 416
 417 fail:
 418         machine_add_to_gc_queue(m);
 419         return r;
 420 }
 421
 422 static int method_register_machine_with_network(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 423         return method_register_machine_internal(message, true, userdata, error);
 424 }
 425
 426 static int method_register_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 427         return method_register_machine_internal(message, false, userdata, error);
 428 }
 429
 430 static int redirect_method_to_machine(sd_bus_message *message, Manager *m, sd_bus_error *error, sd_bus_message_handler_t method) {
 431         Machine *machine;
 432         const char *name;
 433         int r;
 434
 435         assert(message);
 436         assert(m);
 437         assert(method);
 438
 439         r = sd_bus_message_read(message, "s", &name);
 440         if (r < 0)
 441                 return sd_bus_error_set_errno(error, r);
 442
 443         machine = hashmap_get(m->machines, name);
 444         if (!machine)
 445                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_MACHINE, "No machine '%s' known", name);
 446
 447         return method(message, machine, error);
 448 }
 449
 450 static int method_terminate_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 451         return redirect_method_to_machine(message, userdata, error, bus_machine_method_terminate);
 452 }
 453
 454 static int method_kill_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 455         return redirect_method_to_machine(message, userdata, error, bus_machine_method_kill);
 456 }
 457
 458 static int method_get_machine_addresses(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 459         return redirect_method_to_machine(message, userdata, error, bus_machine_method_get_addresses);
 460 }
 461
 462 static int method_get_machine_os_release(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 463         return redirect_method_to_machine(message, userdata, error, bus_machine_method_get_os_release);
 464 }
 465
 466 static int method_list_images(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 467         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 468         _cleanup_hashmap_free_ Hashmap *images = NULL;
 469         Manager *m = userdata;
 470         Image *image;
 471         Iterator i;
 472         int r;
 473
 474         assert(message);
 475         assert(m);
 476
 477         images = hashmap_new(&image_hash_ops);
 478         if (!images)
 479                 return -ENOMEM;
 480
 481         r = image_discover(IMAGE_MACHINE, images);
 482         if (r < 0)
 483                 return r;
 484
 485         r = sd_bus_message_new_method_return(message, &reply);
 486         if (r < 0)
 487                 return r;
 488
 489         r = sd_bus_message_open_container(reply, 'a', "(ssbttto)");
 490         if (r < 0)
 491                 return r;
 492
 493         HASHMAP_FOREACH(image, images, i) {
 494                 _cleanup_free_ char *p = NULL;
 495
 496                 p = image_bus_path(image->name);
 497                 if (!p)
 498                         return -ENOMEM;
 499
 500                 r = sd_bus_message_append(reply, "(ssbttto)",
 501                                           image->name,
 502                                           image_type_to_string(image->type),
 503                                           image->read_only,
 504                                           image->crtime,
 505                                           image->mtime,
 506                                           image->usage,
 507                                           p);
 508                 if (r < 0)
 509                         return r;
 510         }
 511
 512         r = sd_bus_message_close_container(reply);
 513         if (r < 0)
 514                 return r;
 515
 516         return sd_bus_send(NULL, reply, NULL);
 517 }
 518
 519 static int method_open_machine_pty(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 520         return redirect_method_to_machine(message, userdata, error, bus_machine_method_open_pty);
 521 }
 522
 523 static int method_open_machine_login(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 524         return redirect_method_to_machine(message, userdata, error, bus_machine_method_open_login);
 525 }
 526
 527 static int method_open_machine_shell(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 528         return redirect_method_to_machine(message, userdata, error, bus_machine_method_open_shell);
 529 }
 530
 531 static int method_bind_mount_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 532         return redirect_method_to_machine(message, userdata, error, bus_machine_method_bind_mount);
 533 }
 534
 535 static int method_copy_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 536         return redirect_method_to_machine(message, userdata, error, bus_machine_method_copy);
 537 }
 538
 539 static int method_open_machine_root_directory(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 540         return redirect_method_to_machine(message, userdata, error, bus_machine_method_open_root_directory);
 541 }
 542
 543 static int method_get_machine_uid_shift(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 544         return redirect_method_to_machine(message, userdata, error, bus_machine_method_get_uid_shift);
 545 }
 546
 547 static int redirect_method_to_image(sd_bus_message *message, Manager *m, sd_bus_error *error, sd_bus_message_handler_t method) {
 548         _cleanup_(image_unrefp) Image* i = NULL;
 549         const char *name;
 550         int r;
 551
 552         assert(message);
 553         assert(m);
 554         assert(method);
 555
 556         r = sd_bus_message_read(message, "s", &name);
 557         if (r < 0)
 558                 return r;
 559
 560         if (!image_name_is_valid(name))
 561                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Image name '%s' is invalid.", name);
 562
 563         r = image_find(IMAGE_MACHINE, name, &i);
 564         if (r == -ENOENT)
 565                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_IMAGE, "No image '%s' known", name);
 566         if (r < 0)
 567                 return r;
 568
 569         i->userdata = m;
 570         return method(message, i, error);
 571 }
 572
 573 static int method_remove_image(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 574         return redirect_method_to_image(message, userdata, error, bus_image_method_remove);
 575 }
 576
 577 static int method_rename_image(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 578         return redirect_method_to_image(message, userdata, error, bus_image_method_rename);
 579 }
 580
 581 static int method_clone_image(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 582         return redirect_method_to_image(message, userdata, error, bus_image_method_clone);
 583 }
 584
 585 static int method_mark_image_read_only(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 586         return redirect_method_to_image(message, userdata, error, bus_image_method_mark_read_only);
 587 }
 588
 589 static int method_get_image_hostname(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 590         return redirect_method_to_image(message, userdata, error, bus_image_method_get_hostname);
 591 }
 592
 593 static int method_get_image_machine_id(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 594         return redirect_method_to_image(message, userdata, error, bus_image_method_get_machine_id);
 595 }
 596
 597 static int method_get_image_machine_info(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 598         return redirect_method_to_image(message, userdata, error, bus_image_method_get_machine_info);
 599 }
 600
 601 static int method_get_image_os_release(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 602         return redirect_method_to_image(message, userdata, error, bus_image_method_get_os_release);
 603 }
 604
 605 static int clean_pool_done(Operation *operation, int ret, sd_bus_error *error) {
 606         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 607         _cleanup_fclose_ FILE *f = NULL;
 608         bool success;
 609         size_t n;
 610         int r;
 611
 612         assert(operation);
 613         assert(operation->extra_fd >= 0);
 614
 615         if (lseek(operation->extra_fd, 0, SEEK_SET) == (off_t) -1)
 616                 return -errno;
 617
 618         f = fdopen(operation->extra_fd, "r");
 619         if (!f)
 620                 return -errno;
 621
 622         operation->extra_fd = -1;
 623
 624         /* The resulting temporary file starts with a boolean value that indicates success or not. */
 625         errno = 0;
 626         n = fread(&success, 1, sizeof(success), f);
 627         if (n != sizeof(success))
 628                 return ret < 0 ? ret : (errno != 0 ? -errno : -EIO);
 629
 630         if (ret < 0) {
 631                 _cleanup_free_ char *name = NULL;
 632
 633                 /* The clean-up operation failed. In this case the resulting temporary file should contain a boolean
 634                  * set to false followed by the name of the failed image. Let's try to read this and use it for the
 635                  * error message. If we can't read it, don't mind, and return the naked error. */
 636
 637                 if (success) /* The resulting temporary file could not be updated, ignore it. */
 638                         return ret;
 639
 640                 r = read_nul_string(f, &name);
 641                 if (r < 0 || isempty(name)) /* Same here... */
 642                         return ret;
 643
 644                 return sd_bus_error_set_errnof(error, ret, "Failed to remove image %s: %m", name);
 645         }
 646
 647         assert(success);
 648
 649         r = sd_bus_message_new_method_return(operation->message, &reply);
 650         if (r < 0)
 651                 return r;
 652
 653         r = sd_bus_message_open_container(reply, 'a', "(st)");
 654         if (r < 0)
 655                 return r;
 656
 657         /* On success the resulting temporary file will contain a list of image names that were removed followed by
 658          * their size on disk. Let's read that and turn it into a bus message. */
 659         for (;;) {
 660                 _cleanup_free_ char *name = NULL;
 661                 uint64_t size;
 662
 663                 r = read_nul_string(f, &name);
 664                 if (r < 0)
 665                         return r;
 666                 if (isempty(name)) /* reached the end */
 667                         break;
 668
 669                 errno = 0;
 670                 n = fread(&size, 1, sizeof(size), f);
 671                 if (n != sizeof(size))
 672                         return errno != 0 ? -errno : -EIO;
 673
 674                 r = sd_bus_message_append(reply, "(st)", name, size);
 675                 if (r < 0)
 676                         return r;
 677         }
 678
 679         r = sd_bus_message_close_container(reply);
 680         if (r < 0)
 681                 return r;
 682
 683         return sd_bus_send(NULL, reply, NULL);
 684 }
 685
 686 static int method_clean_pool(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 687         enum {
 688                 REMOVE_ALL,
 689                 REMOVE_HIDDEN,
 690         } mode;
 691
 692         _cleanup_close_pair_ int errno_pipe_fd[2] = { -1, -1 };
 693         _cleanup_close_ int result_fd = -1;
 694         Manager *m = userdata;
 695         Operation *operation;
 696         const char *mm;
 697         pid_t child;
 698         int r;
 699
 700         assert(message);
 701
 702         if (m->n_operations >= OPERATIONS_MAX)
 703                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Too many ongoing operations.");
 704
 705         r = sd_bus_message_read(message, "s", &mm);
 706         if (r < 0)
 707                 return r;
 708
 709         if (streq(mm, "all"))
 710                 mode = REMOVE_ALL;
 711         else if (streq(mm, "hidden"))
 712                 mode = REMOVE_HIDDEN;
 713         else
 714                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown mode '%s'.", mm);
 715
 716         r = bus_verify_polkit_async(
 717                         message,
 718                         CAP_SYS_ADMIN,
 719                         "org.freedesktop.machine1.manage-machines",
 720                         NULL,
 721                         false,
 722                         UID_INVALID,
 723                         &m->polkit_registry,
 724                         error);
 725         if (r < 0)
 726                 return r;
 727         if (r == 0)
 728                 return 1; /* Will call us back */
 729
 730         if (pipe2(errno_pipe_fd, O_CLOEXEC|O_NONBLOCK) < 0)
 731                 return sd_bus_error_set_errnof(error, errno, "Failed to create pipe: %m");
 732
 733         /* Create a temporary file we can dump information about deleted images into. We use a temporary file for this
 734          * instead of a pipe or so, since this might grow quit large in theory and we don't want to process this
 735          * continuously */
 736         result_fd = open_tmpfile_unlinkable(NULL, O_RDWR|O_CLOEXEC);
 737         if (result_fd < 0)
 738                 return -errno;
 739
 740         /* This might be a slow operation, run it asynchronously in a background process */
 741         r = safe_fork("(sd-clean)", FORK_RESET_SIGNALS, &child);
 742         if (r < 0)
 743                 return sd_bus_error_set_errnof(error, r, "Failed to fork(): %m");
 744         if (r == 0) {
 745                 _cleanup_hashmap_free_ Hashmap *images = NULL;
 746                 bool success = true;
 747                 Image *image;
 748                 Iterator i;
 749                 ssize_t l;
 750
 751                 errno_pipe_fd[0] = safe_close(errno_pipe_fd[0]);
 752
 753                 images = hashmap_new(&image_hash_ops);
 754                 if (!images) {
 755                         r = -ENOMEM;
 756                         goto child_fail;
 757                 }
 758
 759                 r = image_discover(IMAGE_MACHINE, images);
 760                 if (r < 0)
 761                         goto child_fail;
 762
 763                 l = write(result_fd, &success, sizeof(success));
 764                 if (l < 0) {
 765                         r = -errno;
 766                         goto child_fail;
 767                 }
 768
 769                 HASHMAP_FOREACH(image, images, i) {
 770
 771                         /* We can't remove vendor images (i.e. those in /usr) */
 772                         if (IMAGE_IS_VENDOR(image))
 773                                 continue;
 774
 775                         if (IMAGE_IS_HOST(image))
 776                                 continue;
 777
 778                         if (mode == REMOVE_HIDDEN && !IMAGE_IS_HIDDEN(image))
 779                                 continue;
 780
 781                         r = image_remove(image);
 782                         if (r == -EBUSY) /* keep images that are currently being used. */
 783                                 continue;
 784                         if (r < 0) {
 785                                 /* If the operation failed, let's override everything we wrote, and instead write there at which image we failed. */
 786                                 success = false;
 787                                 (void) ftruncate(result_fd, 0);
 788                                 (void) lseek(result_fd, 0, SEEK_SET);
 789                                 (void) write(result_fd, &success, sizeof(success));
 790                                 (void) write(result_fd, image->name, strlen(image->name)+1);
 791                                 goto child_fail;
 792                         }
 793
 794                         l = write(result_fd, image->name, strlen(image->name)+1);
 795                         if (l < 0) {
 796                                 r = -errno;
 797                                 goto child_fail;
 798                         }
 799
 800                         l = write(result_fd, &image->usage_exclusive, sizeof(image->usage_exclusive));
 801                         if (l < 0) {
 802                                 r = -errno;
 803                                 goto child_fail;
 804                         }
 805                 }
 806
 807                 result_fd = safe_close(result_fd);
 808                 _exit(EXIT_SUCCESS);
 809
 810         child_fail:
 811                 (void) write(errno_pipe_fd[1], &r, sizeof(r));
 812                 _exit(EXIT_FAILURE);
 813         }
 814
 815         errno_pipe_fd[1] = safe_close(errno_pipe_fd[1]);
 816
 817         /* The clean-up might take a while, hence install a watch on the child and return */
 818
 819         r = operation_new(m, NULL, child, message, errno_pipe_fd[0], &operation);
 820         if (r < 0) {
 821                 (void) sigkill_wait(child);
 822                 return r;
 823         }
 824
 825         operation->extra_fd = result_fd;
 826         operation->done = clean_pool_done;
 827
 828         result_fd = -1;
 829         errno_pipe_fd[0] = -1;
 830
 831         return 1;
 832 }
 833
 834 static int method_set_pool_limit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 835         Manager *m = userdata;
 836         uint64_t limit;
 837         int r;
 838
 839         assert(message);
 840
 841         r = sd_bus_message_read(message, "t", &limit);
 842         if (r < 0)
 843                 return r;
 844         if (!FILE_SIZE_VALID_OR_INFINITY(limit))
 845                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "New limit out of range");
 846
 847         r = bus_verify_polkit_async(
 848                         message,
 849                         CAP_SYS_ADMIN,
 850                         "org.freedesktop.machine1.manage-machines",
 851                         NULL,
 852                         false,
 853                         UID_INVALID,
 854                         &m->polkit_registry,
 855                         error);
 856         if (r < 0)
 857                 return r;
 858         if (r == 0)
 859                 return 1; /* Will call us back */
 860
 861         /* Set up the machine directory if necessary */
 862         r = setup_machine_directory(error);
 863         if (r < 0)
 864                 return r;
 865
 866         (void) btrfs_qgroup_set_limit("/var/lib/machines", 0, limit);
 867
 868         r = btrfs_subvol_set_subtree_quota_limit("/var/lib/machines", 0, limit);
 869         if (r == -ENOTTY)
 870                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Quota is only supported on btrfs.");
 871         if (r < 0)
 872                 return sd_bus_error_set_errnof(error, r, "Failed to adjust quota limit: %m");
 873
 874         return sd_bus_reply_method_return(message, NULL);
 875 }
 876
 877 static int method_set_image_limit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 878         return redirect_method_to_image(message, userdata, error, bus_image_method_set_limit);
 879 }
 880
 881 static int method_map_from_machine_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 882         _cleanup_fclose_ FILE *f = NULL;
 883         Manager *m = userdata;
 884         const char *name, *p;
 885         Machine *machine;
 886         uint32_t uid;
 887         int r;
 888
 889         r = sd_bus_message_read(message, "su", &name, &uid);
 890         if (r < 0)
 891                 return r;
 892
 893         if (!uid_is_valid(uid))
 894                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid user ID " UID_FMT, uid);
 895
 896         machine = hashmap_get(m->machines, name);
 897         if (!machine)
 898                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_MACHINE, "No machine '%s' known", name);
 899
 900         if (machine->class != MACHINE_CONTAINER)
 901                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Not supported for non-container machines.");
 902
 903         p = procfs_file_alloca(machine->leader, "uid_map");
 904         f = fopen(p, "re");
 905         if (!f)
 906                 return -errno;
 907
 908         for (;;) {
 909                 uid_t uid_base, uid_shift, uid_range, converted;
 910                 int k;
 911
 912                 errno = 0;
 913                 k = fscanf(f, UID_FMT " " UID_FMT " " UID_FMT, &uid_base, &uid_shift, &uid_range);
 914                 if (k < 0 && feof(f))
 915                         break;
 916                 if (k != 3) {
 917                         if (ferror(f) && errno > 0)
 918                                 return -errno;
 919
 920                         return -EIO;
 921                 }
 922
 923                 if (uid < uid_base || uid >= uid_base + uid_range)
 924                         continue;
 925
 926                 converted = uid - uid_base + uid_shift;
 927                 if (!uid_is_valid(converted))
 928                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid user ID " UID_FMT, uid);
 929
 930                 return sd_bus_reply_method_return(message, "u", (uint32_t) converted);
 931         }
 932
 933         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER_MAPPING, "Machine '%s' has no matching user mappings.", name);
 934 }
 935
 936 static int method_map_to_machine_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 937         Manager *m = userdata;
 938         Machine *machine;
 939         uid_t uid;
 940         Iterator i;
 941         int r;
 942
 943         r = sd_bus_message_read(message, "u", &uid);
 944         if (r < 0)
 945                 return r;
 946         if (!uid_is_valid(uid))
 947                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid user ID " UID_FMT, uid);
 948         if (uid < 0x10000)
 949                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER_MAPPING, "User " UID_FMT " belongs to host UID range", uid);
 950
 951         HASHMAP_FOREACH(machine, m->machines, i) {
 952                 _cleanup_fclose_ FILE *f = NULL;
 953                 char p[STRLEN("/proc//uid_map") + DECIMAL_STR_MAX(pid_t) + 1];
 954
 955                 if (machine->class != MACHINE_CONTAINER)
 956                         continue;
 957
 958                 xsprintf(p, "/proc/" UID_FMT "/uid_map", machine->leader);
 959                 f = fopen(p, "re");
 960                 if (!f) {
 961                         log_warning_errno(errno, "Failed to open %s, ignoring,", p);
 962                         continue;
 963                 }
 964
 965                 for (;;) {
 966                         _cleanup_free_ char *o = NULL;
 967                         uid_t uid_base, uid_shift, uid_range, converted;
 968                         int k;
 969
 970                         errno = 0;
 971                         k = fscanf(f, UID_FMT " " UID_FMT " " UID_FMT, &uid_base, &uid_shift, &uid_range);
 972                         if (k < 0 && feof(f))
 973                                 break;
 974                         if (k != 3) {
 975                                 if (ferror(f) && errno > 0)
 976                                         return -errno;
 977
 978                                 return -EIO;
 979                         }
 980
 981                         /* The private user namespace is disabled, ignoring. */
 982                         if (uid_shift == 0)
 983                                 continue;
 984
 985                         if (uid < uid_shift || uid >= uid_shift + uid_range)
 986                                 continue;
 987
 988                         converted = (uid - uid_shift + uid_base);
 989                         if (!uid_is_valid(converted))
 990                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid user ID " UID_FMT, uid);
 991
 992                         o = machine_bus_path(machine);
 993                         if (!o)
 994                                 return -ENOMEM;
 995
 996                         return sd_bus_reply_method_return(message, "sou", machine->name, o, (uint32_t) converted);
 997                 }
 998         }
 999
1000         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER_MAPPING, "No matching user mapping for " UID_FMT ".", uid);
1001 }
1002
1003 static int method_map_from_machine_group(sd_bus_message *message, void *groupdata, sd_bus_error *error) {
1004         _cleanup_fclose_ FILE *f = NULL;
1005         Manager *m = groupdata;
1006         const char *name, *p;
1007         Machine *machine;
1008         uint32_t gid;
1009         int r;
1010
1011         r = sd_bus_message_read(message, "su", &name, &gid);
1012         if (r < 0)
1013                 return r;
1014
1015         if (!gid_is_valid(gid))
1016                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid group ID " GID_FMT, gid);
1017
1018         machine = hashmap_get(m->machines, name);
1019         if (!machine)
1020                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_MACHINE, "No machine '%s' known", name);
1021
1022         if (machine->class != MACHINE_CONTAINER)
1023                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Not supported for non-container machines.");
1024
1025         p = procfs_file_alloca(machine->leader, "gid_map");
1026         f = fopen(p, "re");
1027         if (!f)
1028                 return -errno;
1029
1030         for (;;) {
1031                 gid_t gid_base, gid_shift, gid_range, converted;
1032                 int k;
1033
1034                 errno = 0;
1035                 k = fscanf(f, GID_FMT " " GID_FMT " " GID_FMT, &gid_base, &gid_shift, &gid_range);
1036                 if (k < 0 && feof(f))
1037                         break;
1038                 if (k != 3) {
1039                         if (ferror(f) && errno > 0)
1040                                 return -errno;
1041
1042                         return -EIO;
1043                 }
1044
1045                 if (gid < gid_base || gid >= gid_base + gid_range)
1046                         continue;
1047
1048                 converted = gid - gid_base + gid_shift;
1049                 if (!gid_is_valid(converted))
1050                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid group ID " GID_FMT, gid);
1051
1052                 return sd_bus_reply_method_return(message, "u", (uint32_t) converted);
1053         }
1054
1055         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_GROUP_MAPPING, "Machine '%s' has no matching group mappings.", name);
1056 }
1057
1058 static int method_map_to_machine_group(sd_bus_message *message, void *groupdata, sd_bus_error *error) {
1059         Manager *m = groupdata;
1060         Machine *machine;
1061         gid_t gid;
1062         Iterator i;
1063         int r;
1064
1065         r = sd_bus_message_read(message, "u", &gid);
1066         if (r < 0)
1067                 return r;
1068         if (!gid_is_valid(gid))
1069                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid group ID " GID_FMT, gid);
1070         if (gid < 0x10000)
1071                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_GROUP_MAPPING, "Group " GID_FMT " belongs to host GID range", gid);
1072
1073         HASHMAP_FOREACH(machine, m->machines, i) {
1074                 _cleanup_fclose_ FILE *f = NULL;
1075                 char p[STRLEN("/proc//gid_map") + DECIMAL_STR_MAX(pid_t) + 1];
1076
1077                 if (machine->class != MACHINE_CONTAINER)
1078                         continue;
1079
1080                 xsprintf(p, "/proc/" GID_FMT "/gid_map", machine->leader);
1081                 f = fopen(p, "re");
1082                 if (!f) {
1083                         log_warning_errno(errno, "Failed to open %s, ignoring,", p);
1084                         continue;
1085                 }
1086
1087                 for (;;) {
1088                         _cleanup_free_ char *o = NULL;
1089                         gid_t gid_base, gid_shift, gid_range, converted;
1090                         int k;
1091
1092                         errno = 0;
1093                         k = fscanf(f, GID_FMT " " GID_FMT " " GID_FMT, &gid_base, &gid_shift, &gid_range);
1094                         if (k < 0 && feof(f))
1095                                 break;
1096                         if (k != 3) {
1097                                 if (ferror(f) && errno > 0)
1098                                         return -errno;
1099
1100                                 return -EIO;
1101                         }
1102
1103                         /* The private user namespace is disabled, ignoring. */
1104                         if (gid_shift == 0)
1105                                 continue;
1106
1107                         if (gid < gid_shift || gid >= gid_shift + gid_range)
1108                                 continue;
1109
1110                         converted = (gid - gid_shift + gid_base);
1111                         if (!gid_is_valid(converted))
1112                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid group ID " GID_FMT, gid);
1113
1114                         o = machine_bus_path(machine);
1115                         if (!o)
1116                                 return -ENOMEM;
1117
1118                         return sd_bus_reply_method_return(message, "sou", machine->name, o, (uint32_t) converted);
1119                 }
1120         }
1121
1122         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_GROUP_MAPPING, "No matching group mapping for " GID_FMT ".", gid);
1123 }
1124
1125 const sd_bus_vtable manager_vtable[] = {
1126         SD_BUS_VTABLE_START(0),
1127         SD_BUS_PROPERTY("PoolPath", "s", property_get_pool_path, 0, 0),
1128         SD_BUS_PROPERTY("PoolUsage", "t", property_get_pool_usage, 0, 0),
1129         SD_BUS_PROPERTY("PoolLimit", "t", property_get_pool_limit, 0, 0),
1130         SD_BUS_METHOD("GetMachine", "s", "o", method_get_machine, SD_BUS_VTABLE_UNPRIVILEGED),
1131         SD_BUS_METHOD("GetImage", "s", "o", method_get_image, SD_BUS_VTABLE_UNPRIVILEGED),
1132         SD_BUS_METHOD("GetMachineByPID", "u", "o", method_get_machine_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
1133         SD_BUS_METHOD("ListMachines", NULL, "a(ssso)", method_list_machines, SD_BUS_VTABLE_UNPRIVILEGED),
1134         SD_BUS_METHOD("ListImages", NULL, "a(ssbttto)", method_list_images, SD_BUS_VTABLE_UNPRIVILEGED),
1135         SD_BUS_METHOD("CreateMachine", "sayssusa(sv)", "o", method_create_machine, 0),
1136         SD_BUS_METHOD("CreateMachineWithNetwork", "sayssusaia(sv)", "o", method_create_machine_with_network, 0),
1137         SD_BUS_METHOD("RegisterMachine", "sayssus", "o", method_register_machine, 0),
1138         SD_BUS_METHOD("RegisterMachineWithNetwork", "sayssusai", "o", method_register_machine_with_network, 0),
1139         SD_BUS_METHOD("TerminateMachine", "s", NULL, method_terminate_machine, SD_BUS_VTABLE_UNPRIVILEGED),
1140         SD_BUS_METHOD("KillMachine", "ssi", NULL, method_kill_machine, SD_BUS_VTABLE_UNPRIVILEGED),
1141         SD_BUS_METHOD("GetMachineAddresses", "s", "a(iay)", method_get_machine_addresses, SD_BUS_VTABLE_UNPRIVILEGED),
1142         SD_BUS_METHOD("GetMachineOSRelease", "s", "a{ss}", method_get_machine_os_release, SD_BUS_VTABLE_UNPRIVILEGED),
1143         SD_BUS_METHOD("OpenMachinePTY", "s", "hs", method_open_machine_pty, 0),
1144         SD_BUS_METHOD("OpenMachineLogin", "s", "hs", method_open_machine_login, SD_BUS_VTABLE_UNPRIVILEGED),
1145         SD_BUS_METHOD("OpenMachineShell", "sssasas", "hs", method_open_machine_shell, SD_BUS_VTABLE_UNPRIVILEGED),
1146         SD_BUS_METHOD("BindMountMachine", "sssbb", NULL, method_bind_mount_machine, SD_BUS_VTABLE_UNPRIVILEGED),
1147         SD_BUS_METHOD("CopyFromMachine", "sss", NULL, method_copy_machine, SD_BUS_VTABLE_UNPRIVILEGED),
1148         SD_BUS_METHOD("CopyToMachine", "sss", NULL, method_copy_machine, SD_BUS_VTABLE_UNPRIVILEGED),
1149         SD_BUS_METHOD("OpenMachineRootDirectory", "s", "h", method_open_machine_root_directory, SD_BUS_VTABLE_UNPRIVILEGED),
1150         SD_BUS_METHOD("GetMachineUIDShift", "s", "u", method_get_machine_uid_shift, SD_BUS_VTABLE_UNPRIVILEGED),
1151         SD_BUS_METHOD("RemoveImage", "s", NULL, method_remove_image, SD_BUS_VTABLE_UNPRIVILEGED),
1152         SD_BUS_METHOD("RenameImage", "ss", NULL, method_rename_image, SD_BUS_VTABLE_UNPRIVILEGED),
1153         SD_BUS_METHOD("CloneImage", "ssb", NULL, method_clone_image, SD_BUS_VTABLE_UNPRIVILEGED),
1154         SD_BUS_METHOD("MarkImageReadOnly", "sb", NULL, method_mark_image_read_only, SD_BUS_VTABLE_UNPRIVILEGED),
1155         SD_BUS_METHOD("GetImageHostname", "s", "s", method_get_image_hostname, SD_BUS_VTABLE_UNPRIVILEGED),
1156         SD_BUS_METHOD("GetImageMachineID", "s", "ay", method_get_image_machine_id, SD_BUS_VTABLE_UNPRIVILEGED),
1157         SD_BUS_METHOD("GetImageMachineInfo", "s", "a{ss}", method_get_image_machine_info, SD_BUS_VTABLE_UNPRIVILEGED),
1158         SD_BUS_METHOD("GetImageOSRelease", "s", "a{ss}", method_get_image_os_release, SD_BUS_VTABLE_UNPRIVILEGED),
1159         SD_BUS_METHOD("SetPoolLimit", "t", NULL, method_set_pool_limit, SD_BUS_VTABLE_UNPRIVILEGED),
1160         SD_BUS_METHOD("SetImageLimit", "st", NULL, method_set_image_limit, SD_BUS_VTABLE_UNPRIVILEGED),
1161         SD_BUS_METHOD("CleanPool", "s", "a(st)", method_clean_pool, SD_BUS_VTABLE_UNPRIVILEGED),
1162         SD_BUS_METHOD("MapFromMachineUser", "su", "u", method_map_from_machine_user, SD_BUS_VTABLE_UNPRIVILEGED),
1163         SD_BUS_METHOD("MapToMachineUser", "u", "sou", method_map_to_machine_user, SD_BUS_VTABLE_UNPRIVILEGED),
1164         SD_BUS_METHOD("MapFromMachineGroup", "su", "u", method_map_from_machine_group, SD_BUS_VTABLE_UNPRIVILEGED),
1165         SD_BUS_METHOD("MapToMachineGroup", "u", "sou", method_map_to_machine_group, SD_BUS_VTABLE_UNPRIVILEGED),
1166         SD_BUS_SIGNAL("MachineNew", "so", 0),
1167         SD_BUS_SIGNAL("MachineRemoved", "so", 0),
1168         SD_BUS_VTABLE_END
1169 };
1170
1171 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1172         const char *path, *result, *unit;
1173         Manager *m = userdata;
1174         Machine *machine;
1175         uint32_t id;
1176         int r;
1177
1178         assert(message);
1179         assert(m);
1180
1181         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
1182         if (r < 0) {
1183                 bus_log_parse_error(r);
1184                 return 0;
1185         }
1186
1187         machine = hashmap_get(m->machine_units, unit);
1188         if (!machine)
1189                 return 0;
1190
1191         if (streq_ptr(path, machine->scope_job)) {
1192                 machine->scope_job = mfree(machine->scope_job);
1193
1194                 if (machine->started) {
1195                         if (streq(result, "done"))
1196                                 machine_send_create_reply(machine, NULL);
1197                         else {
1198                                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
1199
1200                                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
1201
1202                                 machine_send_create_reply(machine, &e);
1203                         }
1204                 }
1205
1206                 machine_save(machine);
1207         }
1208
1209         machine_add_to_gc_queue(machine);
1210         return 0;
1211 }
1212
1213 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1214         _cleanup_free_ char *unit = NULL;
1215         const char *path;
1216         Manager *m = userdata;
1217         Machine *machine;
1218         int r;
1219
1220         assert(message);
1221         assert(m);
1222
1223         path = sd_bus_message_get_path(message);
1224         if (!path)
1225                 return 0;
1226
1227         r = unit_name_from_dbus_path(path, &unit);
1228         if (r == -EINVAL) /* not for a unit */
1229                 return 0;
1230         if (r < 0) {
1231                 log_oom();
1232                 return 0;
1233         }
1234
1235         machine = hashmap_get(m->machine_units, unit);
1236         if (!machine)
1237                 return 0;
1238
1239         machine_add_to_gc_queue(machine);
1240         return 0;
1241 }
1242
1243 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1244         const char *path, *unit;
1245         Manager *m = userdata;
1246         Machine *machine;
1247         int r;
1248
1249         assert(message);
1250         assert(m);
1251
1252         r = sd_bus_message_read(message, "so", &unit, &path);
1253         if (r < 0) {
1254                 bus_log_parse_error(r);
1255                 return 0;
1256         }
1257
1258         machine = hashmap_get(m->machine_units, unit);
1259         if (!machine)
1260                 return 0;
1261
1262         machine_add_to_gc_queue(machine);
1263         return 0;
1264 }
1265
1266 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1267         Manager *m = userdata;
1268         Machine *machine;
1269         Iterator i;
1270         int b, r;
1271
1272         assert(message);
1273         assert(m);
1274
1275         r = sd_bus_message_read(message, "b", &b);
1276         if (r < 0) {
1277                 bus_log_parse_error(r);
1278                 return 0;
1279         }
1280         if (b)
1281                 return 0;
1282
1283         /* systemd finished reloading, let's recheck all our machines */
1284         log_debug("System manager has been reloaded, rechecking machines...");
1285
1286         HASHMAP_FOREACH(machine, m->machines, i)
1287                 machine_add_to_gc_queue(machine);
1288
1289         return 0;
1290 }
1291
1292 int manager_start_scope(
1293                 Manager *manager,
1294                 const char *scope,
1295                 pid_t pid,
1296                 const char *slice,
1297                 const char *description,
1298                 sd_bus_message *more_properties,
1299                 sd_bus_error *error,
1300                 char **job) {
1301
1302         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
1303         int r;
1304
1305         assert(manager);
1306         assert(scope);
1307         assert(pid > 1);
1308
1309         r = sd_bus_message_new_method_call(
1310                         manager->bus,
1311                         &m,
1312                         "org.freedesktop.systemd1",
1313                         "/org/freedesktop/systemd1",
1314                         "org.freedesktop.systemd1.Manager",
1315                         "StartTransientUnit");
1316         if (r < 0)
1317                 return r;
1318
1319         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
1320         if (r < 0)
1321                 return r;
1322
1323         r = sd_bus_message_open_container(m, 'a', "(sv)");
1324         if (r < 0)
1325                 return r;
1326
1327         if (!isempty(slice)) {
1328                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
1329                 if (r < 0)
1330                         return r;
1331         }
1332
1333         if (!isempty(description)) {
1334                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
1335                 if (r < 0)
1336                         return r;
1337         }
1338
1339         r = sd_bus_message_append(m, "(sv)(sv)(sv)(sv)(sv)",
1340                                   "PIDs", "au", 1, pid,
1341                                   "Delegate", "b", 1,
1342                                   "CollectMode", "s", "inactive-or-failed",
1343                                   "AddRef", "b", 1,
1344                                   "TasksMax", "t", UINT64_C(16384));
1345         if (r < 0)
1346                 return r;
1347
1348         if (more_properties) {
1349                 r = sd_bus_message_copy(m, more_properties, true);
1350                 if (r < 0)
1351                         return r;
1352         }
1353
1354         r = sd_bus_message_close_container(m);
1355         if (r < 0)
1356                 return r;
1357
1358         r = sd_bus_message_append(m, "a(sa(sv))", 0);
1359         if (r < 0)
1360                 return r;
1361
1362         r = sd_bus_call(manager->bus, m, 0, error, &reply);
1363         if (r < 0)
1364                 return r;
1365
1366         if (job) {
1367                 const char *j;
1368                 char *copy;
1369
1370                 r = sd_bus_message_read(reply, "o", &j);
1371                 if (r < 0)
1372                         return r;
1373
1374                 copy = strdup(j);
1375                 if (!copy)
1376                         return -ENOMEM;
1377
1378                 *job = copy;
1379         }
1380
1381         return 1;
1382 }
1383
1384 int manager_unref_unit(
1385                 Manager *m,
1386                 const char *unit,
1387                 sd_bus_error *error) {
1388
1389         assert(m);
1390         assert(unit);
1391
1392         return sd_bus_call_method(
1393                         m->bus,
1394                         "org.freedesktop.systemd1",
1395                         "/org/freedesktop/systemd1",
1396                         "org.freedesktop.systemd1.Manager",
1397                         "UnrefUnit",
1398                         error,
1399                         NULL,
1400                         "s",
1401                         unit);
1402 }
1403
1404 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
1405         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1406         int r;
1407
1408         assert(manager);
1409         assert(unit);
1410
1411         r = sd_bus_call_method(
1412                         manager->bus,
1413                         "org.freedesktop.systemd1",
1414                         "/org/freedesktop/systemd1",
1415                         "org.freedesktop.systemd1.Manager",
1416                         "StopUnit",
1417                         error,
1418                         &reply,
1419                         "ss", unit, "fail");
1420         if (r < 0) {
1421                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
1422                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
1423
1424                         if (job)
1425                                 *job = NULL;
1426
1427                         sd_bus_error_free(error);
1428                         return 0;
1429                 }
1430
1431                 return r;
1432         }
1433
1434         if (job) {
1435                 const char *j;
1436                 char *copy;
1437
1438                 r = sd_bus_message_read(reply, "o", &j);
1439                 if (r < 0)
1440                         return r;
1441
1442                 copy = strdup(j);
1443                 if (!copy)
1444                         return -ENOMEM;
1445
1446                 *job = copy;
1447         }
1448
1449         return 1;
1450 }
1451
1452 int manager_kill_unit(Manager *manager, const char *unit, int signo, sd_bus_error *error) {
1453         assert(manager);
1454         assert(unit);
1455
1456         return sd_bus_call_method(
1457                         manager->bus,
1458                         "org.freedesktop.systemd1",
1459                         "/org/freedesktop/systemd1",
1460                         "org.freedesktop.systemd1.Manager",
1461                         "KillUnit",
1462                         error,
1463                         NULL,
1464                         "ssi", unit, "all", signo);
1465 }
1466
1467 int manager_unit_is_active(Manager *manager, const char *unit) {
1468         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1469         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1470         _cleanup_free_ char *path = NULL;
1471         const char *state;
1472         int r;
1473
1474         assert(manager);
1475         assert(unit);
1476
1477         path = unit_dbus_path_from_name(unit);
1478         if (!path)
1479                 return -ENOMEM;
1480
1481         r = sd_bus_get_property(
1482                         manager->bus,
1483                         "org.freedesktop.systemd1",
1484                         path,
1485                         "org.freedesktop.systemd1.Unit",
1486                         "ActiveState",
1487                         &error,
1488                         &reply,
1489                         "s");
1490         if (r < 0) {
1491                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
1492                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
1493                         return true;
1494
1495                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
1496                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
1497                         return false;
1498
1499                 return r;
1500         }
1501
1502         r = sd_bus_message_read(reply, "s", &state);
1503         if (r < 0)
1504                 return -EINVAL;
1505
1506         return !STR_IN_SET(state, "inactive", "failed");
1507 }
1508
1509 int manager_job_is_active(Manager *manager, const char *path) {
1510         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1511         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1512         int r;
1513
1514         assert(manager);
1515         assert(path);
1516
1517         r = sd_bus_get_property(
1518                         manager->bus,
1519                         "org.freedesktop.systemd1",
1520                         path,
1521                         "org.freedesktop.systemd1.Job",
1522                         "State",
1523                         &error,
1524                         &reply,
1525                         "s");
1526         if (r < 0) {
1527                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
1528                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
1529                         return true;
1530
1531                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
1532                         return false;
1533
1534                 return r;
1535         }
1536
1537         /* We don't actually care about the state really. The fact
1538          * that we could read the job state is enough for us */
1539
1540         return true;
1541 }
1542
1543 int manager_get_machine_by_pid(Manager *m, pid_t pid, Machine **machine) {
1544         Machine *mm;
1545         int r;
1546
1547         assert(m);
1548         assert(pid >= 1);
1549         assert(machine);
1550
1551         mm = hashmap_get(m->machine_leaders, PID_TO_PTR(pid));
1552         if (!mm) {
1553                 _cleanup_free_ char *unit = NULL;
1554
1555                 r = cg_pid_get_unit(pid, &unit);
1556                 if (r >= 0)
1557                         mm = hashmap_get(m->machine_units, unit);
1558         }
1559         if (!mm)
1560                 return 0;
1561
1562         *machine = mm;
1563         return 1;
1564 }
1565
1566 int manager_add_machine(Manager *m, const char *name, Machine **_machine) {
1567         Machine *machine;
1568
1569         assert(m);
1570         assert(name);
1571
1572         machine = hashmap_get(m->machines, name);
1573         if (!machine) {
1574                 machine = machine_new(m, _MACHINE_CLASS_INVALID, name);
1575                 if (!machine)
1576                         return -ENOMEM;
1577         }
1578
1579         if (_machine)
1580                 *_machine = machine;
1581
1582         return 0;
1583 }