socket.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <sys/types.h>
  23 #include <sys/stat.h>
  24 #include <unistd.h>
  25 #include <errno.h>
  26 #include <fcntl.h>
  27 #include <sys/epoll.h>
  28 #include <signal.h>
  29
  30 #include "unit.h"
  31 #include "socket.h"
  32 #include "log.h"
  33
  34 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
  35         [SOCKET_DEAD] = UNIT_INACTIVE,
  36         [SOCKET_START_PRE] = UNIT_ACTIVATING,
  37         [SOCKET_START_POST] = UNIT_ACTIVATING,
  38         [SOCKET_LISTENING] = UNIT_ACTIVE,
  39         [SOCKET_RUNNING] = UNIT_ACTIVE,
  40         [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
  41         [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
  42         [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
  43         [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
  44         [SOCKET_STOP_POST_SIGTERM] = UNIT_DEACTIVATING,
  45         [SOCKET_STOP_POST_SIGKILL] = UNIT_DEACTIVATING,
  46         [SOCKET_MAINTAINANCE] = UNIT_INACTIVE,
  47 };
  48
  49 static const char* const state_string_table[_SOCKET_STATE_MAX] = {
  50         [SOCKET_DEAD] = "dead",
  51         [SOCKET_START_PRE] = "start-pre",
  52         [SOCKET_START_POST] = "start-post",
  53         [SOCKET_LISTENING] = "listening",
  54         [SOCKET_RUNNING] = "running",
  55         [SOCKET_STOP_PRE] = "stop-pre",
  56         [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
  57         [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
  58         [SOCKET_STOP_POST] = "stop-post",
  59         [SOCKET_STOP_POST_SIGTERM] = "stop-post-sigterm",
  60         [SOCKET_STOP_POST_SIGKILL] = "stop-post-sigkill",
  61         [SOCKET_MAINTAINANCE] = "maintainance"
  62 };
  63
  64 static void socket_done(Unit *u) {
  65         Socket *s = SOCKET(u);
  66         SocketPort *p;
  67
  68         assert(s);
  69
  70         while ((p = s->ports)) {
  71                 LIST_REMOVE(SocketPort, port, s->ports, p);
  72
  73                 if (p->fd >= 0)
  74                         close_nointr(p->fd);
  75                 free(p->path);
  76                 free(p);
  77         }
  78
  79         exec_context_done(&s->exec_context);
  80         exec_command_free_array(s->exec_command, _SOCKET_EXEC_MAX);
  81         s->control_command = NULL;
  82
  83         if (s->control_pid > 0) {
  84                 unit_unwatch_pid(u, s->control_pid);
  85                 s->control_pid = 0;
  86         }
  87
  88         s->service = NULL;
  89
  90         free(s->bind_to_device);
  91
  92         unit_unwatch_timer(u, &s->timer_watch);
  93 }
  94
  95 static int socket_init(Unit *u) {
  96         Socket *s = SOCKET(u);
  97         char *t;
  98         int r;
  99
 100         /* First, reset everything to the defaults, in case this is a
 101          * reload */
 102
 103         s->state = 0;
 104         s->timer_watch.type = WATCH_INVALID;
 105         s->bind_ipv6_only = false;
 106         s->backlog = SOMAXCONN;
 107         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 108         s->directory_mode = 0755;
 109         s->socket_mode = 0666;
 110         exec_context_init(&s->exec_context);
 111
 112         if ((r = unit_load_fragment_and_dropin(u)) <= 0) {
 113                 if (r == 0)
 114                         r = -ENOENT;
 115                 goto fail;
 116         }
 117
 118         if (!(t = unit_name_change_suffix(unit_id(u), ".service"))) {
 119                 r = -ENOMEM;
 120                 goto fail;
 121         }
 122
 123         r = manager_load_unit(u->meta.manager, t, (Unit**) &s->service);
 124         free(t);
 125
 126         if (r < 0)
 127                 goto fail;
 128
 129         if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service))) < 0)
 130                 goto fail;
 131
 132         /* Add default cgroup */
 133         if ((r = unit_add_default_cgroup(u)) < 0)
 134                 goto fail;
 135
 136         return 0;
 137
 138 fail:
 139         socket_done(u);
 140         return r;
 141 }
 142
 143 static const char* listen_lookup(int type) {
 144
 145         if (type == SOCK_STREAM)
 146                 return "ListenStream";
 147         else if (type == SOCK_DGRAM)
 148                 return "ListenDatagram";
 149         else if (type == SOCK_SEQPACKET)
 150                 return "ListenSequentialPacket";
 151
 152         assert_not_reached("Unknown socket type");
 153         return NULL;
 154 }
 155
 156 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
 157
 158         static const char* const command_table[_SOCKET_EXEC_MAX] = {
 159                 [SOCKET_EXEC_START_PRE] = "StartPre",
 160                 [SOCKET_EXEC_START_POST] = "StartPost",
 161                 [SOCKET_EXEC_STOP_PRE] = "StopPre",
 162                 [SOCKET_EXEC_STOP_POST] = "StopPost"
 163         };
 164
 165         SocketExecCommand c;
 166         Socket *s = SOCKET(u);
 167         SocketPort *p;
 168         const char *prefix2;
 169         char *p2;
 170
 171         assert(s);
 172         assert(f);
 173
 174         p2 = strappend(prefix, "\t");
 175         prefix2 = p2 ? p2 : prefix;
 176
 177         fprintf(f,
 178                 "%sSocket State: %s\n"
 179                 "%sBindIPv6Only: %s\n"
 180                 "%sBacklog: %u\n"
 181                 "%sSocketMode: %04o\n"
 182                 "%sDirectoryMode: %04o\n",
 183                 prefix, state_string_table[s->state],
 184                 prefix, yes_no(s->bind_ipv6_only),
 185                 prefix, s->backlog,
 186                 prefix, s->socket_mode,
 187                 prefix, s->directory_mode);
 188
 189         if (s->bind_to_device)
 190                 fprintf(f,
 191                         "%sBindToDevice: %s\n",
 192                         prefix, s->bind_to_device);
 193
 194         LIST_FOREACH(port, p, s->ports) {
 195
 196                 if (p->type == SOCKET_SOCKET) {
 197                         const char *t;
 198                         int r;
 199                         char *k;
 200
 201                         if ((r = socket_address_print(&p->address, &k)) < 0)
 202                                 t = strerror(-r);
 203                         else
 204                                 t = k;
 205
 206                         fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
 207                         free(k);
 208                 } else
 209                         fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
 210         }
 211
 212         exec_context_dump(&s->exec_context, f, prefix);
 213
 214         for (c = 0; c < _SOCKET_EXEC_MAX; c++) {
 215                 if (!s->exec_command[c])
 216                         continue;
 217
 218                 fprintf(f, "%s→ %s:\n",
 219                         prefix, command_table[c]);
 220
 221                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 222         }
 223
 224         free(p2);
 225 }
 226
 227 static void socket_close_fds(Socket *s) {
 228         SocketPort *p;
 229
 230         assert(s);
 231
 232         LIST_FOREACH(port, p, s->ports) {
 233                 if (p->fd < 0)
 234                         continue;
 235
 236                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 237                 assert_se(close_nointr(p->fd) >= 0);
 238
 239                 p->fd = -1;
 240         }
 241 }
 242
 243 static int socket_open_fds(Socket *s) {
 244         SocketPort *p;
 245         int r;
 246
 247         assert(s);
 248
 249         LIST_FOREACH(port, p, s->ports) {
 250
 251                 if (p->fd >= 0)
 252                         continue;
 253
 254                 if (p->type == SOCKET_SOCKET) {
 255
 256                         if ((r = socket_address_listen(
 257                                              &p->address,
 258                                              s->backlog,
 259                                              s->bind_ipv6_only,
 260                                              s->bind_to_device,
 261                                              s->directory_mode,
 262                                              s->socket_mode,
 263                                              &p->fd)) < 0)
 264                                 goto rollback;
 265
 266                 } else {
 267                         struct stat st;
 268                         assert(p->type == SOCKET_FIFO);
 269
 270                         mkdir_parents(p->path, s->directory_mode);
 271
 272                         if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
 273                                 r = -errno;
 274                                 goto rollback;
 275                         }
 276
 277                         if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
 278                                 r = -errno;
 279                                 goto rollback;
 280                         }
 281
 282                         if (fstat(p->fd, &st) < 0) {
 283                                 r = -errno;
 284                                 goto rollback;
 285                         }
 286
 287                         /* FIXME verify user, access mode */
 288
 289                         if (!S_ISFIFO(st.st_mode)) {
 290                                 r = -EEXIST;
 291                                 goto rollback;
 292                         }
 293                 }
 294         }
 295
 296         return 0;
 297
 298 rollback:
 299         socket_close_fds(s);
 300         return r;
 301 }
 302
 303 static void socket_unwatch_fds(Socket *s) {
 304         SocketPort *p;
 305
 306         assert(s);
 307
 308         LIST_FOREACH(port, p, s->ports) {
 309                 if (p->fd < 0)
 310                         continue;
 311
 312                 unit_unwatch_fd(UNIT(s), &p->fd_watch);
 313         }
 314 }
 315
 316 static int socket_watch_fds(Socket *s) {
 317         SocketPort *p;
 318         int r;
 319
 320         assert(s);
 321
 322         LIST_FOREACH(port, p, s->ports) {
 323                 if (p->fd < 0)
 324                         continue;
 325
 326                 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
 327                         goto fail;
 328         }
 329
 330         return 0;
 331
 332 fail:
 333         socket_unwatch_fds(s);
 334         return r;
 335 }
 336
 337 static void socket_set_state(Socket *s, SocketState state) {
 338         SocketState old_state;
 339         assert(s);
 340
 341         old_state = s->state;
 342         s->state = state;
 343
 344         if (state != SOCKET_START_PRE &&
 345             state != SOCKET_START_POST &&
 346             state != SOCKET_STOP_PRE &&
 347             state != SOCKET_STOP_PRE_SIGTERM &&
 348             state != SOCKET_STOP_PRE_SIGKILL &&
 349             state != SOCKET_STOP_POST &&
 350             state != SOCKET_STOP_POST_SIGTERM &&
 351             state != SOCKET_STOP_POST_SIGKILL)
 352                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 353
 354         if (state != SOCKET_START_PRE &&
 355             state != SOCKET_START_POST &&
 356             state != SOCKET_STOP_PRE &&
 357             state != SOCKET_STOP_PRE_SIGTERM &&
 358             state != SOCKET_STOP_PRE_SIGKILL &&
 359             state != SOCKET_STOP_POST &&
 360             state != SOCKET_STOP_POST_SIGTERM &&
 361             state != SOCKET_STOP_POST_SIGKILL)
 362                 if (s->control_pid > 0) {
 363                         unit_unwatch_pid(UNIT(s), s->control_pid);
 364                         s->control_pid = 0;
 365                 }
 366
 367         if (state != SOCKET_START_PRE &&
 368             state != SOCKET_START_POST &&
 369             state != SOCKET_STOP_PRE &&
 370             state != SOCKET_STOP_POST)
 371                 s->control_command = NULL;
 372
 373         if (state != SOCKET_START_POST &&
 374             state != SOCKET_LISTENING &&
 375             state != SOCKET_RUNNING &&
 376             state != SOCKET_STOP_PRE &&
 377             state != SOCKET_STOP_PRE_SIGTERM &&
 378             state != SOCKET_STOP_PRE_SIGKILL)
 379                 socket_close_fds(s);
 380
 381         if (state != SOCKET_LISTENING)
 382                 socket_unwatch_fds(s);
 383
 384         log_debug("%s changed %s → %s", unit_id(UNIT(s)), state_string_table[old_state], state_string_table[state]);
 385
 386         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 387 }
 388
 389 static int socket_spawn(Socket *s, ExecCommand *c, bool timeout, pid_t *_pid) {
 390         pid_t pid;
 391         int r;
 392
 393         assert(s);
 394         assert(c);
 395         assert(_pid);
 396
 397         if (timeout) {
 398                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 399                         goto fail;
 400         } else
 401                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 402
 403         if ((r = exec_spawn(c,
 404                             &s->exec_context,
 405                             NULL, 0,
 406                             true,
 407                             true,
 408                             UNIT(s)->meta.cgroup_bondings,
 409                             &pid)) < 0)
 410                 goto fail;
 411
 412         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
 413                 /* FIXME: we need to do something here */
 414                 goto fail;
 415
 416         *_pid = pid;
 417
 418         return 0;
 419
 420 fail:
 421         if (timeout)
 422                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 423
 424         return r;
 425 }
 426
 427 static void socket_enter_dead(Socket *s, bool success) {
 428         assert(s);
 429
 430         if (!success)
 431                 s->failure = true;
 432
 433         socket_set_state(s, s->failure ? SOCKET_MAINTAINANCE : SOCKET_DEAD);
 434 }
 435
 436 static void socket_enter_stop_post(Socket *s, bool success) {
 437         int r;
 438         assert(s);
 439
 440         if (!success)
 441                 s->failure = true;
 442
 443         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST]))
 444                 if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
 445                         goto fail;
 446
 447         socket_set_state(s, SOCKET_STOP_POST);
 448
 449         if (!s->control_command)
 450                 socket_enter_dead(s, true);
 451
 452         return;
 453
 454 fail:
 455         log_warning("%s failed to run stop-post executable: %s", unit_id(UNIT(s)), strerror(-r));
 456         socket_enter_dead(s, false);
 457 }
 458
 459 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
 460         int r;
 461
 462         assert(s);
 463
 464         if (!success)
 465                 s->failure = true;
 466
 467         if (s->control_pid > 0) {
 468                 int sig;
 469
 470                 sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_POST_SIGTERM) ? SIGTERM : SIGKILL;
 471
 472                 if (kill(s->control_pid, sig) < 0 && errno != ESRCH) {
 473                         r = -errno;
 474                         goto fail;
 475                 }
 476         }
 477
 478         socket_set_state(s, state);
 479
 480         if (s->control_pid <= 0)
 481                 socket_enter_dead(s, true);
 482
 483         return;
 484
 485 fail:
 486         log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
 487
 488         if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
 489                 socket_enter_stop_post(s, false);
 490         else
 491                 socket_enter_dead(s, false);
 492 }
 493
 494 static void socket_enter_stop_pre(Socket *s, bool success) {
 495         int r;
 496         assert(s);
 497
 498         if (!success)
 499                 s->failure = true;
 500
 501         if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE]))
 502                 if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
 503                         goto fail;
 504
 505         socket_set_state(s, SOCKET_STOP_PRE);
 506
 507         if (!s->control_command)
 508                 socket_enter_stop_post(s, true);
 509
 510         return;
 511
 512 fail:
 513         log_warning("%s failed to run stop-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
 514         socket_enter_stop_post(s, false);
 515 }
 516
 517 static void socket_enter_listening(Socket *s) {
 518         int r;
 519         assert(s);
 520
 521         if ((r = socket_watch_fds(s)) < 0) {
 522                 log_warning("%s failed to watch sockets: %s", unit_id(UNIT(s)), strerror(-r));
 523                 goto fail;
 524         }
 525
 526         socket_set_state(s, SOCKET_LISTENING);
 527         return;
 528
 529 fail:
 530         socket_enter_stop_pre(s, false);
 531 }
 532
 533 static void socket_enter_start_post(Socket *s) {
 534         int r;
 535         assert(s);
 536
 537         if ((r = socket_open_fds(s)) < 0) {
 538                 log_warning("%s failed to listen on sockets: %s", unit_id(UNIT(s)), strerror(-r));
 539                 goto fail;
 540         }
 541
 542         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST]))
 543                 if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) {
 544                         log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
 545                         goto fail;
 546                 }
 547
 548         socket_set_state(s, SOCKET_START_POST);
 549
 550         if (!s->control_command)
 551                 socket_enter_listening(s);
 552
 553         return;
 554
 555 fail:
 556         socket_enter_stop_pre(s, false);
 557 }
 558
 559 static void socket_enter_start_pre(Socket *s) {
 560         int r;
 561         assert(s);
 562
 563         if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE]))
 564                 if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
 565                         goto fail;
 566
 567         socket_set_state(s, SOCKET_START_PRE);
 568
 569         if (!s->control_command)
 570                 socket_enter_start_post(s);
 571
 572         return;
 573
 574 fail:
 575         log_warning("%s failed to run start-pre exectuable: %s", unit_id(UNIT(s)), strerror(-r));
 576         socket_enter_dead(s, false);
 577 }
 578
 579 static void socket_enter_running(Socket *s) {
 580         int r;
 581
 582         assert(s);
 583
 584         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
 585                 goto fail;
 586
 587         socket_set_state(s, SOCKET_RUNNING);
 588         return;
 589
 590 fail:
 591         log_warning("%s failed to queue socket startup job: %s", unit_id(UNIT(s)), strerror(-r));
 592         socket_enter_dead(s, false);
 593 }
 594
 595 static void socket_run_next(Socket *s, bool success) {
 596         int r;
 597
 598         assert(s);
 599         assert(s->control_command);
 600         assert(s->control_command->command_next);
 601
 602         if (!success)
 603                 s->failure = true;
 604
 605         s->control_command = s->control_command->command_next;
 606
 607         if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
 608                 goto fail;
 609
 610         return;
 611
 612 fail:
 613         if (s->state == SOCKET_STOP_PRE)
 614                 socket_enter_stop_post(s, false);
 615         else if (s->state == SOCKET_STOP_POST)
 616                 socket_enter_dead(s, false);
 617         else
 618                 socket_enter_stop_pre(s, false);
 619 }
 620
 621 static int socket_start(Unit *u) {
 622         Socket *s = SOCKET(u);
 623
 624         assert(s);
 625
 626         /* We cannot fulfill this request right now, try again later
 627          * please! */
 628         if (s->state == SOCKET_STOP_PRE ||
 629             s->state == SOCKET_STOP_PRE_SIGKILL ||
 630             s->state == SOCKET_STOP_PRE_SIGTERM ||
 631             s->state == SOCKET_STOP_POST ||
 632             s->state == SOCKET_STOP_POST_SIGTERM ||
 633             s->state == SOCKET_STOP_POST_SIGKILL)
 634                 return -EAGAIN;
 635
 636         if (s->state == SOCKET_START_PRE ||
 637             s->state == SOCKET_START_POST)
 638                 return 0;
 639
 640         /* Cannot run this without the service being around */
 641         if (s->service->meta.load_state != UNIT_LOADED)
 642                 return -ENOENT;
 643
 644         assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTAINANCE);
 645
 646         s->failure = false;
 647         socket_enter_start_pre(s);
 648         return 0;
 649 }
 650
 651 static int socket_stop(Unit *u) {
 652         Socket *s = SOCKET(u);
 653
 654         assert(s);
 655
 656         /* We cannot fulfill this request right now, try again later
 657          * please! */
 658         if (s->state == SOCKET_START_PRE ||
 659             s->state == SOCKET_START_POST)
 660                 return -EAGAIN;
 661
 662         assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
 663
 664         socket_enter_stop_pre(s, true);
 665         return 0;
 666 }
 667
 668 static UnitActiveState socket_active_state(Unit *u) {
 669         assert(u);
 670
 671         return state_translation_table[SOCKET(u)->state];
 672 }
 673
 674 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
 675         Socket *s = SOCKET(u);
 676
 677         assert(s);
 678
 679         log_debug("Incoming traffic on %s", unit_id(u));
 680
 681         if (events != EPOLLIN)
 682                 socket_enter_stop_pre(s, false);
 683
 684         socket_enter_running(s);
 685 }
 686
 687 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
 688         Socket *s = SOCKET(u);
 689         bool success;
 690
 691         assert(s);
 692         assert(pid >= 0);
 693
 694         success = code == CLD_EXITED && status == 0;
 695         s->failure = s->failure || !success;
 696
 697         assert(s->control_pid == pid);
 698         assert(s->control_command);
 699
 700         exec_status_fill(&s->control_command->exec_status, pid, code, status);
 701         s->control_pid = 0;
 702
 703         log_debug("%s control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
 704
 705         if (s->control_command->command_next &&
 706             (success || (s->state == SOCKET_STOP_PRE || s->state == SOCKET_STOP_POST))) {
 707                 log_debug("%s running next command for the state %s", unit_id(u), state_string_table[s->state]);
 708                 socket_run_next(s, success);
 709         } else {
 710                 /* No further commands for this step, so let's figure
 711                  * out what to do next */
 712
 713                 log_debug("%s got final SIGCHLD for state %s", unit_id(u), state_string_table[s->state]);
 714
 715                 switch (s->state) {
 716
 717                 case SOCKET_START_PRE:
 718                         if (success)
 719                                 socket_enter_start_post(s);
 720                         else
 721                                 socket_enter_stop_pre(s, false);
 722                         break;
 723
 724                 case SOCKET_START_POST:
 725                         if (success)
 726                                 socket_enter_listening(s);
 727                         else
 728                                 socket_enter_stop_pre(s, false);
 729                         break;
 730
 731                 case SOCKET_STOP_PRE:
 732                 case SOCKET_STOP_PRE_SIGTERM:
 733                 case SOCKET_STOP_PRE_SIGKILL:
 734                         socket_enter_stop_post(s, success);
 735                         break;
 736
 737                 case SOCKET_STOP_POST:
 738                 case SOCKET_STOP_POST_SIGTERM:
 739                 case SOCKET_STOP_POST_SIGKILL:
 740                         socket_enter_dead(s, success);
 741                         break;
 742
 743                 default:
 744                         assert_not_reached("Uh, control process died at wrong time.");
 745                 }
 746         }
 747 }
 748
 749 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
 750         Socket *s = SOCKET(u);
 751
 752         assert(s);
 753         assert(elapsed == 1);
 754
 755         assert(w == &s->timer_watch);
 756
 757         switch (s->state) {
 758
 759         case SOCKET_START_PRE:
 760         case SOCKET_START_POST:
 761                 log_warning("%s operation timed out. Stopping.", unit_id(u));
 762                 socket_enter_stop_pre(s, false);
 763                 break;
 764
 765         case SOCKET_STOP_PRE:
 766                 log_warning("%s stopping timed out. Terminating.", unit_id(u));
 767                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
 768                 break;
 769
 770         case SOCKET_STOP_PRE_SIGTERM:
 771                 log_warning("%s stopping timed out. Killing.", unit_id(u));
 772                 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
 773                 break;
 774
 775         case SOCKET_STOP_PRE_SIGKILL:
 776                 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
 777                 socket_enter_stop_post(s, false);
 778                 break;
 779
 780         case SOCKET_STOP_POST:
 781                 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
 782                 socket_enter_signal(s, SOCKET_STOP_POST_SIGTERM, false);
 783                 break;
 784
 785         case SOCKET_STOP_POST_SIGTERM:
 786                 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
 787                 socket_enter_signal(s, SOCKET_STOP_POST_SIGKILL, false);
 788                 break;
 789
 790         case SOCKET_STOP_POST_SIGKILL:
 791                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
 792                 socket_enter_dead(s, false);
 793                 break;
 794
 795         default:
 796                 assert_not_reached("Timeout at wrong time.");
 797         }
 798 }
 799
 800 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
 801         int *rfds;
 802         unsigned rn_fds, k;
 803         SocketPort *p;
 804
 805         assert(s);
 806         assert(fds);
 807         assert(n_fds);
 808
 809         /* Called from the service code for requesting our fds */
 810
 811         rn_fds = 0;
 812         LIST_FOREACH(port, p, s->ports)
 813                 if (p->fd >= 0)
 814                         rn_fds++;
 815
 816         if (!(rfds = new(int, rn_fds)) < 0)
 817                 return -ENOMEM;
 818
 819         k = 0;
 820         LIST_FOREACH(port, p, s->ports)
 821                 if (p->fd >= 0)
 822                         rfds[k++] = p->fd;
 823
 824         assert(k == rn_fds);
 825
 826         *fds = rfds;
 827         *n_fds = rn_fds;
 828
 829         return 0;
 830 }
 831
 832 void socket_notify_service_dead(Socket *s) {
 833         assert(s);
 834
 835         /* The service is dead. Dang. */
 836
 837         if (s->state == SOCKET_RUNNING) {
 838                 log_debug("%s got notified about service death.", unit_id(UNIT(s)));
 839                 socket_enter_listening(s);
 840         }
 841 }
 842
 843 const UnitVTable socket_vtable = {
 844         .suffix = ".socket",
 845
 846         .init = socket_init,
 847         .done = socket_done,
 848
 849         .dump = socket_dump,
 850
 851         .start = socket_start,
 852         .stop = socket_stop,
 853
 854         .active_state = socket_active_state,
 855
 856         .fd_event = socket_fd_event,
 857         .sigchld_event = socket_sigchld_event,
 858         .timer_event = socket_timer_event
 859 };