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units: fix rescue.service race with plymouth
[thirdparty/systemd.git] / src / socket.c
CommitLineData
d6c9574f 1/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
5cb5a6ff 2
a7334b09
LP		 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
83c60c9f
LP		 22#include <sys/types.h>
23#include <sys/stat.h>
24#include <unistd.h>
25#include <errno.h>
26#include <fcntl.h>
f94ea366 27#include <sys/epoll.h>
034c6ed7 28#include <signal.h>
4f2d528d 29#include <arpa/inet.h>
916abb21 30#include <mqueue.h>
83c60c9f 31
87f0e418 32#include "unit.h"
5cb5a6ff 33#include "socket.h"
cebf8b20 34#include "netinet/tcp.h"
83c60c9f 35#include "log.h"
23a177ef
LP		 36#include "load-dropin.h"
37#include "load-fragment.h"
9e2f7c11 38#include "strv.h"
4f2d528d 39#include "unit-name.h"
4139c1b2 40#include "dbus-socket.h"
4fd5948e 41#include "missing.h"
a40eb732 42#include "special.h"
398ef8ba 43#include "bus-errors.h"
e51bc1a2 44#include "label.h"
9a57c629 45#include "exit-status.h"
f6a6225e 46#include "def.h"
83c60c9f 47
acbb0225 48static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
87f0e418
LP		 49 [SOCKET_DEAD] = UNIT_INACTIVE,
50 [SOCKET_START_PRE] = UNIT_ACTIVATING,
51 [SOCKET_START_POST] = UNIT_ACTIVATING,
52 [SOCKET_LISTENING] = UNIT_ACTIVE,
53 [SOCKET_RUNNING] = UNIT_ACTIVE,
54 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
55 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
56 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
57 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
80876c20
LP		 58 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
59 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
fdf20a31 60 [SOCKET_FAILED] = UNIT_FAILED
83c60c9f 61};
5cb5a6ff 62
a16e1123
LP		 63static void socket_init(Unit *u) {
64 Socket *s = SOCKET(u);
65
66 assert(u);
67 assert(u->meta.load_state == UNIT_STUB);
68
a16e1123
LP		 69 s->backlog = SOMAXCONN;
70 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
71 s->directory_mode = 0755;
9131f660 72 s->socket_mode = 0666;
a16e1123 73
6cf6bbc2
LP		 74 s->max_connections = 64;
75
4fd5948e 76 s->priority = -1;
4fd5948e
LP		 77 s->ip_tos = -1;
78 s->ip_ttl = -1;
4fd5948e 79 s->mark = -1;
4fd5948e 80
a16e1123 81 exec_context_init(&s->exec_context);
0a494f1f
LP		 82 s->exec_context.std_output = u->meta.manager->default_std_output;
83 s->exec_context.std_error = u->meta.manager->default_std_error;
a16e1123
LP		 84
85 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
86}
acbb0225 87
5e94833f
LP		 88static void socket_unwatch_control_pid(Socket *s) {
89 assert(s);
90
91 if (s->control_pid <= 0)
92 return;
93
94 unit_unwatch_pid(UNIT(s), s->control_pid);
95 s->control_pid = 0;
96}
97
87f0e418
LP		 98static void socket_done(Unit *u) {
99 Socket *s = SOCKET(u);
034c6ed7 100 SocketPort *p;
6cf6bbc2 101 Meta *i;
034c6ed7
LP		 102
103 assert(s);
104
105 while ((p = s->ports)) {
106 LIST_REMOVE(SocketPort, port, s->ports, p);
107
a16e1123
LP		 108 if (p->fd >= 0) {
109 unit_unwatch_fd(UNIT(s), &p->fd_watch);
110 close_nointr_nofail(p->fd);
111 }
112
034c6ed7
LP		 113 free(p->path);
114 free(p);
115 }
116
117 exec_context_done(&s->exec_context);
e537352b 118 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
034c6ed7
LP		 119 s->control_command = NULL;
120
5e94833f 121 socket_unwatch_control_pid(s);
034c6ed7
LP		 122
123 s->service = NULL;
124
cebf8b20
TT		 125 free(s->tcp_congestion);
126 s->tcp_congestion = NULL;
127
acbb0225 128 free(s->bind_to_device);
e537352b 129 s->bind_to_device = NULL;
acbb0225
LP		 130
131 unit_unwatch_timer(u, &s->timer_watch);
6cf6bbc2
LP		 132
133 /* Make sure no service instance refers to us anymore. */
ab5c3e3f 134 LIST_FOREACH(units_by_type, i, u->meta.manager->units_by_type[UNIT_SERVICE]) {
6cf6bbc2
LP		 135 Service *service = (Service *) i;
136
f976f3f6
LP		 137 if (service->accept_socket == s)
138 service->accept_socket = NULL;
139
140 set_remove(service->configured_sockets, s);
6cf6bbc2 141 }
5cb5a6ff
LP		 142}
143
b15bdda8
LP		 144static int socket_instantiate_service(Socket *s) {
145 char *prefix, *name;
146 int r;
147 Unit *u;
148
149 assert(s);
150
151 /* This fills in s->service if it isn't filled in yet. For
152 * Accept=yes sockets we create the next connection service
153 * here. For Accept=no this is mostly a NOP since the service
154 * is figured out at load time anyway. */
155
156 if (s->service)
157 return 0;
158
159 assert(s->accept);
160
161 if (!(prefix = unit_name_to_prefix(s->meta.id)))
162 return -ENOMEM;
163
164 r = asprintf(&name, "%s@%u.service", prefix, s->n_accepted);
165 free(prefix);
166
167 if (r < 0)
168 return -ENOMEM;
169
170 r = manager_load_unit(s->meta.manager, name, NULL, NULL, &u);
171 free(name);
172
173 if (r < 0)
174 return r;
175
7b4bf06b
LP		 176#ifdef HAVE_SYSV_COMPAT
177 if (SERVICE(u)->sysv_path) {
178 log_error("Using SysV services for socket activation is not supported. Refusing.");
179 return -ENOENT;
180 }
181#endif
182
6c073082 183 u->meta.no_gc = true;
b15bdda8
LP		 184 s->service = SERVICE(u);
185 return 0;
186}
187
4f2d528d
LP		 188static bool have_non_accept_socket(Socket *s) {
189 SocketPort *p;
190
191 assert(s);
192
193 if (!s->accept)
194 return true;
195
dd5ad9d4
LP		 196 LIST_FOREACH(port, p, s->ports) {
197
198 if (p->type != SOCKET_SOCKET)
199 return true;
200
4f2d528d
LP		 201 if (!socket_address_can_accept(&p->address))
202 return true;
dd5ad9d4 203 }
4f2d528d
LP		 204
205 return false;
206}
207
208static int socket_verify(Socket *s) {
209 assert(s);
210
4cd1fbcc 211 if (s->meta.load_state != UNIT_LOADED)
4f2d528d
LP		 212 return 0;
213
214 if (!s->ports) {
4cd1fbcc 215 log_error("%s lacks Listen setting. Refusing.", s->meta.id);
4f2d528d
LP		 216 return -EINVAL;
217 }
218
0009d2a6
LP		 219 if (s->accept && have_non_accept_socket(s)) {
220 log_error("%s configured for accepting sockets, but sockets are non-accepting. Refusing.", s->meta.id);
221 return -EINVAL;
222 }
223
6cf6bbc2 224 if (s->accept && s->max_connections <= 0) {
4d0e5dbd
LP		 225 log_error("%s's MaxConnection setting too small. Refusing.", s->meta.id);
226 return -EINVAL;
227 }
228
d9ff321a
LP		 229 if (s->accept && s->service) {
230 log_error("Explicit service configuration for accepting sockets not supported on %s. Refusing.", s->meta.id);
231 return -EINVAL;
232 }
233
2e22afe9 234 if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
4d0e5dbd 235 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
6cf6bbc2
LP		 236 return -EINVAL;
237 }
238
4f2d528d
LP		 239 return 0;
240}
241
6e2ef85b
LP		 242static bool socket_needs_mount(Socket *s, const char *prefix) {
243 SocketPort *p;
244
245 assert(s);
246
247 LIST_FOREACH(port, p, s->ports) {
248
249 if (p->type == SOCKET_SOCKET) {
250 if (socket_address_needs_mount(&p->address, prefix))
251 return true;
916abb21 252 } else if (p->type == SOCKET_FIFO || p->type == SOCKET_SPECIAL) {
6e2ef85b
LP		 253 if (path_startswith(p->path, prefix))
254 return true;
255 }
256 }
257
258 return false;
259}
260
261int socket_add_one_mount_link(Socket *s, Mount *m) {
262 int r;
263
264 assert(s);
265 assert(m);
266
267 if (s->meta.load_state != UNIT_LOADED ||
268 m->meta.load_state != UNIT_LOADED)
269 return 0;
270
271 if (!socket_needs_mount(s, m->where))
272 return 0;
273
2c966c03 274 if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0)
6e2ef85b
LP		 275 return r;
276
277 return 0;
278}
279
280static int socket_add_mount_links(Socket *s) {
281 Meta *other;
282 int r;
283
284 assert(s);
285
ab5c3e3f 286 LIST_FOREACH(units_by_type, other, s->meta.manager->units_by_type[UNIT_MOUNT])
6e2ef85b
LP		 287 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
288 return r;
289
290 return 0;
291}
292
293static int socket_add_device_link(Socket *s) {
294 char *t;
295 int r;
296
297 assert(s);
298
299 if (!s->bind_to_device)
300 return 0;
301
302 if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
303 return -ENOMEM;
304
305 r = unit_add_node_link(UNIT(s), t, false);
306 free(t);
307
308 return r;
309}
310
a40eb732
LP		 311static int socket_add_default_dependencies(Socket *s) {
312 int r;
313 assert(s);
314
2a77d31d
LP		 315 if (s->meta.manager->running_as == MANAGER_SYSTEM) {
316 if ((r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
317 return r;
318
a40eb732
LP		 319 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
320 return r;
2a77d31d 321 }
a40eb732 322
ead8e478 323 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
a40eb732
LP		 324}
325
e537352b
LP		 326static int socket_load(Unit *u) {
327 Socket *s = SOCKET(u);
328 int r;
44d8db9e 329
e537352b
LP		 330 assert(u);
331 assert(u->meta.load_state == UNIT_STUB);
44d8db9e 332
e537352b 333 if ((r = unit_load_fragment_and_dropin(u)) < 0)
23a177ef 334 return r;
44d8db9e 335
23a177ef 336 /* This is a new unit? Then let's add in some extras */
e537352b 337 if (u->meta.load_state == UNIT_LOADED) {
44d8db9e 338
4f2d528d 339 if (have_non_accept_socket(s)) {
d9ff321a
LP		 340
341 if (!s->service)
342 if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)) < 0)
343 return r;
23a177ef 344
701cc384 345 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
4f2d528d
LP		 346 return r;
347 }
44d8db9e 348
6e2ef85b
LP		 349 if ((r = socket_add_mount_links(s)) < 0)
350 return r;
351
352 if ((r = socket_add_device_link(s)) < 0)
353 return r;
354
23a177ef
LP		 355 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
356 return r;
357
d686d8a9 358 if ((r = unit_add_default_cgroups(u)) < 0)
23a177ef 359 return r;
a40eb732
LP		 360
361 if (s->meta.default_dependencies)
362 if ((r = socket_add_default_dependencies(s)) < 0)
363 return r;
23a177ef
LP		 364 }
365
4f2d528d 366 return socket_verify(s);
44d8db9e
LP		 367}
368
7a22745a
LP		 369static const char* listen_lookup(int family, int type) {
370
371 if (family == AF_NETLINK)
372 return "ListenNetlink";
542563ba
LP		 373
374 if (type == SOCK_STREAM)
375 return "ListenStream";
376 else if (type == SOCK_DGRAM)
377 return "ListenDatagram";
378 else if (type == SOCK_SEQPACKET)
379 return "ListenSequentialPacket";
380
034c6ed7 381 assert_not_reached("Unknown socket type");
542563ba
LP		 382 return NULL;
383}
384
87f0e418 385static void socket_dump(Unit *u, FILE *f, const char *prefix) {
5cb5a6ff 386
5cb5a6ff 387 SocketExecCommand c;
87f0e418 388 Socket *s = SOCKET(u);
542563ba 389 SocketPort *p;
82ba9f08
LP		 390 const char *prefix2;
391 char *p2;
5cb5a6ff
LP		 392
393 assert(s);
fa068367 394 assert(f);
5cb5a6ff 395
82ba9f08
LP		 396 p2 = strappend(prefix, "\t");
397 prefix2 = p2 ? p2 : prefix;
c43d20a0 398
5cb5a6ff
LP		 399 fprintf(f,
400 "%sSocket State: %s\n"
542563ba 401 "%sBindIPv6Only: %s\n"
b5a0699f
LP		 402 "%sBacklog: %u\n"
403 "%sSocketMode: %04o\n"
4fd5948e
LP		 404 "%sDirectoryMode: %04o\n"
405 "%sKeepAlive: %s\n"
cebf8b20 406 "%sFreeBind: %s\n"
6b6d2dee 407 "%sTransparent: %s\n"
ec6370a2 408 "%sBroadcast: %s\n"
cebf8b20 409 "%sTCPCongestion: %s\n",
a16e1123 410 prefix, socket_state_to_string(s->state),
c0120d99 411 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
b5a0699f
LP		 412 prefix, s->backlog,
413 prefix, s->socket_mode,
4fd5948e
LP		 414 prefix, s->directory_mode,
415 prefix, yes_no(s->keep_alive),
cebf8b20 416 prefix, yes_no(s->free_bind),
6b6d2dee 417 prefix, yes_no(s->transparent),
ec6370a2 418 prefix, yes_no(s->broadcast),
83a95334 419 prefix, strna(s->tcp_congestion));
542563ba 420
70123e68
LP		 421 if (s->control_pid > 0)
422 fprintf(f,
bb00e604
LP		 423 "%sControl PID: %lu\n",
424 prefix, (unsigned long) s->control_pid);
70123e68 425
acbb0225
LP		 426 if (s->bind_to_device)
427 fprintf(f,
428 "%sBindToDevice: %s\n",
429 prefix, s->bind_to_device);
430
4f2d528d
LP		 431 if (s->accept)
432 fprintf(f,
6cf6bbc2
LP		 433 "%sAccepted: %u\n"
434 "%sNConnections: %u\n"
435 "%sMaxConnections: %u\n",
436 prefix, s->n_accepted,
437 prefix, s->n_connections,
438 prefix, s->max_connections);
4f2d528d 439
4fd5948e
LP		 440 if (s->priority >= 0)
441 fprintf(f,
442 "%sPriority: %i\n",
443 prefix, s->priority);
444
445 if (s->receive_buffer > 0)
446 fprintf(f,
447 "%sReceiveBuffer: %zu\n",
448 prefix, s->receive_buffer);
449
450 if (s->send_buffer > 0)
451 fprintf(f,
452 "%sSendBuffer: %zu\n",
453 prefix, s->send_buffer);
454
455 if (s->ip_tos >= 0)
456 fprintf(f,
457 "%sIPTOS: %i\n",
458 prefix, s->ip_tos);
459
460 if (s->ip_ttl >= 0)
461 fprintf(f,
462 "%sIPTTL: %i\n",
463 prefix, s->ip_ttl);
464
465 if (s->pipe_size > 0)
466 fprintf(f,
467 "%sPipeSize: %zu\n",
468 prefix, s->pipe_size);
469
470 if (s->mark >= 0)
471 fprintf(f,
472 "%sMark: %i\n",
473 prefix, s->mark);
474
916abb21
LP		 475 if (s->mq_maxmsg > 0)
476 fprintf(f,
477 "%sMessageQueueMaxMessages: %li\n",
478 prefix, s->mq_maxmsg);
479
480 if (s->mq_msgsize > 0)
481 fprintf(f,
482 "%sMessageQueueMessageSize: %li\n",
483 prefix, s->mq_msgsize);
484
034c6ed7 485 LIST_FOREACH(port, p, s->ports) {
5cb5a6ff 486
542563ba
LP		 487 if (p->type == SOCKET_SOCKET) {
488 const char *t;
489 int r;
e364ad06 490 char *k = NULL;
542563ba
LP		 491
492 if ((r = socket_address_print(&p->address, &k)) < 0)
493 t = strerror(-r);
494 else
495 t = k;
496
7a22745a 497 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t);
542563ba 498 free(k);
b0a3f2bc
LP		 499 } else if (p->type == SOCKET_SPECIAL)
500 fprintf(f, "%sListenSpecial: %s\n", prefix, p->path);
916abb21
LP		 501 else if (p->type == SOCKET_MQUEUE)
502 fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path);
b0a3f2bc 503 else
542563ba
LP		 504 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
505 }
5cb5a6ff
LP		 506
507 exec_context_dump(&s->exec_context, f, prefix);
508
e537352b 509 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
c43d20a0
LP		 510 if (!s->exec_command[c])
511 continue;
5cb5a6ff 512
40d50879 513 fprintf(f, "%s-> %s:\n",
a16e1123 514 prefix, socket_exec_command_to_string(c));
c43d20a0
LP		 515
516 exec_command_dump_list(s->exec_command[c], f, prefix2);
5cb5a6ff 517 }
c43d20a0 518
82ba9f08 519 free(p2);
5cb5a6ff
LP		 520}
521
4f2d528d
LP		 522static int instance_from_socket(int fd, unsigned nr, char **instance) {
523 socklen_t l;
524 char *r;
525 union {
526 struct sockaddr sa;
527 struct sockaddr_un un;
528 struct sockaddr_in in;
529 struct sockaddr_in6 in6;
530 struct sockaddr_storage storage;
531 } local, remote;
532
533 assert(fd >= 0);
534 assert(instance);
535
536 l = sizeof(local);
537 if (getsockname(fd, &local.sa, &l) < 0)
538 return -errno;
539
540 l = sizeof(remote);
541 if (getpeername(fd, &remote.sa, &l) < 0)
542 return -errno;
543
544 switch (local.sa.sa_family) {
545
546 case AF_INET: {
547 uint32_t
548 a = ntohl(local.in.sin_addr.s_addr),
549 b = ntohl(remote.in.sin_addr.s_addr);
550
551 if (asprintf(&r,
b15bdda8 552 "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
4f2d528d
LP		 553 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
554 ntohs(local.in.sin_port),
555 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
556 ntohs(remote.in.sin_port)) < 0)
557 return -ENOMEM;
558
559 break;
560 }
561
562 case AF_INET6: {
2b061f5a
LP		 563 static const char ipv4_prefix[] = {
564 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
565 };
566
567 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
568 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
569 const uint8_t
570 *a = local.in6.sin6_addr.s6_addr+12,
571 *b = remote.in6.sin6_addr.s6_addr+12;
572
573 if (asprintf(&r,
b15bdda8 574 "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
2b061f5a
LP		 575 a[0], a[1], a[2], a[3],
576 ntohs(local.in6.sin6_port),
577 b[0], b[1], b[2], b[3],
578 ntohs(remote.in6.sin6_port)) < 0)
579 return -ENOMEM;
580 } else {
581 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
582
583 if (asprintf(&r,
b15bdda8 584 "%s:%u-%s:%u",
2b061f5a
LP		 585 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
586 ntohs(local.in6.sin6_port),
587 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
588 ntohs(remote.in6.sin6_port)) < 0)
589 return -ENOMEM;
590 }
4f2d528d
LP		 591
592 break;
593 }
594
595 case AF_UNIX: {
596 struct ucred ucred;
597
598 l = sizeof(ucred);
599 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
600 return -errno;
601
602 if (asprintf(&r,
bb00e604 603 "%u-%lu-%lu",
4f2d528d 604 nr,
bb00e604
LP		 605 (unsigned long) ucred.pid,
606 (unsigned long) ucred.uid) < 0)
4f2d528d
LP		 607 return -ENOMEM;
608
609 break;
610 }
611
612 default:
613 assert_not_reached("Unhandled socket type.");
614 }
615
616 *instance = r;
617 return 0;
618}
619
034c6ed7 620static void socket_close_fds(Socket *s) {
83c60c9f
LP		 621 SocketPort *p;
622
623 assert(s);
624
034c6ed7 625 LIST_FOREACH(port, p, s->ports) {
83c60c9f
LP		 626 if (p->fd < 0)
627 continue;
628
acbb0225 629 unit_unwatch_fd(UNIT(s), &p->fd_watch);
a16e1123
LP		 630 close_nointr_nofail(p->fd);
631
632 /* One little note: we should never delete any sockets
633 * in the file system here! After all some other
634 * process we spawned might still have a reference of
635 * this fd and wants to continue to use it. Therefore
636 * we delete sockets in the file system before we
637 * create a new one, not after we stopped using
638 * one! */
9152c765 639
83c60c9f
LP		 640 p->fd = -1;
641 }
642}
643
4fd5948e
LP		 644static void socket_apply_socket_options(Socket *s, int fd) {
645 assert(s);
646 assert(fd >= 0);
647
648 if (s->keep_alive) {
649 int b = s->keep_alive;
650 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
651 log_warning("SO_KEEPALIVE failed: %m");
652 }
653
ec6370a2
LP		 654 if (s->broadcast) {
655 int one = 1;
656 if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0)
657 log_warning("SO_BROADCAST failed: %m");
658 }
659
4fd5948e
LP		 660 if (s->priority >= 0)
661 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
662 log_warning("SO_PRIORITY failed: %m");
663
664 if (s->receive_buffer > 0) {
665 int value = (int) s->receive_buffer;
b8cef44e
KS		 666 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0)
667 log_warning("SO_RCVBUFFORCE failed: %m");
4fd5948e
LP		 668 }
669
670 if (s->send_buffer > 0) {
671 int value = (int) s->send_buffer;
b8cef44e
KS		 672 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0)
673 log_warning("SO_SNDBUFFORCE failed: %m");
4fd5948e
LP		 674 }
675
676 if (s->mark >= 0)
677 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
678 log_warning("SO_MARK failed: %m");
679
680 if (s->ip_tos >= 0)
681 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
682 log_warning("IP_TOS failed: %m");
683
46925ac5
LP		 684 if (s->ip_ttl >= 0) {
685 int r, x;
686
687 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
5bfcc1c6
FF		 688
689 if (socket_ipv6_is_supported())
690 x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
691 else {
692 x = -1;
693 errno = EAFNOSUPPORT;
694 }
46925ac5
LP		 695
696 if (r < 0 && x < 0)
697 log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
698 }
cebf8b20
TT		 699
700 if (s->tcp_congestion)
701 if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0)
702 log_warning("TCP_CONGESTION failed: %m");
4fd5948e
LP		 703}
704
b15bdda8 705static void socket_apply_fifo_options(Socket *s, int fd) {
4fd5948e
LP		 706 assert(s);
707 assert(fd >= 0);
708
709 if (s->pipe_size > 0)
710 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
711 log_warning("F_SETPIPE_SZ: %m");
712}
713
b15bdda8
LP		 714static int fifo_address_create(
715 const char *path,
716 mode_t directory_mode,
717 mode_t socket_mode,
b15bdda8
LP		 718 int *_fd) {
719
7a58bfa4 720 int fd = -1, r = 0;
b15bdda8
LP		 721 struct stat st;
722 mode_t old_mask;
723
724 assert(path);
725 assert(_fd);
726
727 mkdir_parents(path, directory_mode);
728
c4e2ceae 729 if ((r = label_fifofile_set(path)) < 0)
56cf987f 730 goto fail;
b15bdda8
LP		 731
732 /* Enforce the right access mode for the fifo */
733 old_mask = umask(~ socket_mode);
734
735 /* Include the original umask in our mask */
736 umask(~socket_mode | old_mask);
737
738 r = mkfifo(path, socket_mode);
739 umask(old_mask);
740
94bc2731 741 if (r < 0 && errno != EEXIST) {
b15bdda8
LP		 742 r = -errno;
743 goto fail;
744 }
745
746 if ((fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
747 r = -errno;
748 goto fail;
749 }
750
56cf987f 751 label_file_clear();
7a58bfa4 752
b15bdda8
LP		 753 if (fstat(fd, &st) < 0) {
754 r = -errno;
755 goto fail;
756 }
757
758 if (!S_ISFIFO(st.st_mode) ||
de0200fc 759 (st.st_mode & 0777) != (socket_mode & ~old_mask) ||
b15bdda8
LP		 760 st.st_uid != getuid() ||
761 st.st_gid != getgid()) {
762
763 r = -EEXIST;
764 goto fail;
765 }
766
767 *_fd = fd;
768 return 0;
769
770fail:
56cf987f
DW		 771 label_file_clear();
772
b15bdda8
LP		 773 if (fd >= 0)
774 close_nointr_nofail(fd);
775
776 return r;
777}
778
b0a3f2bc
LP		 779static int special_address_create(
780 const char *path,
781 int *_fd) {
782
783 int fd = -1, r = 0;
784 struct stat st;
785
786 assert(path);
787 assert(_fd);
788
789 if ((fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
790 r = -errno;
791 goto fail;
792 }
793
794 if (fstat(fd, &st) < 0) {
795 r = -errno;
796 goto fail;
797 }
798
799 /* Check whether this is a /proc, /sys or /dev file or char device */
800 if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) {
801 r = -EEXIST;
802 goto fail;
803 }
804
805 *_fd = fd;
806 return 0;
807
808fail:
809 if (fd >= 0)
810 close_nointr_nofail(fd);
811
812 return r;
813}
814
916abb21
LP		 815static int mq_address_create(
816 const char *path,
817 mode_t mq_mode,
818 long maxmsg,
819 long msgsize,
820 int *_fd) {
821
822 int fd = -1, r = 0;
823 struct stat st;
824 mode_t old_mask;
825 struct mq_attr _attr, *attr = NULL;
826
827 assert(path);
828 assert(_fd);
829
830 if (maxmsg > 0 && msgsize > 0) {
831 zero(_attr);
832 _attr.mq_flags = O_NONBLOCK;
833 _attr.mq_maxmsg = maxmsg;
834 _attr.mq_msgsize = msgsize;
835 attr = &_attr;
836 }
837
838 /* Enforce the right access mode for the mq */
839 old_mask = umask(~ mq_mode);
840
841 /* Include the original umask in our mask */
842 umask(~mq_mode | old_mask);
843
844 fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr);
845 umask(old_mask);
846
847 if (fd < 0 && errno != EEXIST) {
848 r = -errno;
849 goto fail;
850 }
851
852 if (fstat(fd, &st) < 0) {
853 r = -errno;
854 goto fail;
855 }
856
857 if ((st.st_mode & 0777) != (mq_mode & ~old_mask) ||
858 st.st_uid != getuid() ||
859 st.st_gid != getgid()) {
860
861 r = -EEXIST;
862 goto fail;
863 }
864
865 *_fd = fd;
866 return 0;
867
868fail:
869 if (fd >= 0)
870 close_nointr_nofail(fd);
871
872 return r;
873}
874
034c6ed7 875static int socket_open_fds(Socket *s) {
83c60c9f
LP		 876 SocketPort *p;
877 int r;
56cf987f 878 char *label = NULL;
049f8642 879 bool know_label = false;
83c60c9f
LP		 880
881 assert(s);
882
034c6ed7 883 LIST_FOREACH(port, p, s->ports) {
83c60c9f 884
034c6ed7
LP		 885 if (p->fd >= 0)
886 continue;
83c60c9f
LP		 887
888 if (p->type == SOCKET_SOCKET) {
889
049f8642
LP		 890 if (!know_label) {
891
892 if ((r = socket_instantiate_service(s)) < 0)
893 return r;
894
189583d7
LP		 895 if (s->service && s->service->exec_command[SERVICE_EXEC_START]) {
896 r = label_get_create_label_from_exe(s->service->exec_command[SERVICE_EXEC_START]->path, &label);
897
898 if (r < 0) {
a7444eda
LP		 899 if (r != -EPERM)
900 return r;
901 }
189583d7 902 }
049f8642
LP		 903
904 know_label = true;
905 }
906
b5a0699f
LP		 907 if ((r = socket_address_listen(
908 &p->address,
909 s->backlog,
910 s->bind_ipv6_only,
911 s->bind_to_device,
4fd5948e 912 s->free_bind,
6b6d2dee 913 s->transparent,
b5a0699f
LP		 914 s->directory_mode,
915 s->socket_mode,
56cf987f 916 label,
b5a0699f 917 &p->fd)) < 0)
83c60c9f
LP		 918 goto rollback;
919
4fd5948e
LP		 920 socket_apply_socket_options(s, p->fd);
921
b0a3f2bc
LP		 922 } else if (p->type == SOCKET_SPECIAL) {
923
924 if ((r = special_address_create(
925 p->path,
926 &p->fd)) < 0)
927 goto rollback;
928
b15bdda8 929 } else if (p->type == SOCKET_FIFO) {
83c60c9f 930
b15bdda8
LP		 931 if ((r = fifo_address_create(
932 p->path,
933 s->directory_mode,
934 s->socket_mode,
b15bdda8 935 &p->fd)) < 0)
83c60c9f 936 goto rollback;
83c60c9f 937
b15bdda8 938 socket_apply_fifo_options(s, p->fd);
916abb21 939 } else if (p->type == SOCKET_MQUEUE) {
83c60c9f 940
916abb21
LP		 941 if ((r = mq_address_create(
942 p->path,
943 s->socket_mode,
944 s->mq_maxmsg,
945 s->mq_msgsize,
946 &p->fd)) < 0)
947 goto rollback;
b15bdda8
LP		 948 } else
949 assert_not_reached("Unknown port type");
034c6ed7
LP		 950 }
951
56cf987f 952 label_free(label);
034c6ed7
LP		 953 return 0;
954
955rollback:
956 socket_close_fds(s);
56cf987f 957 label_free(label);
034c6ed7
LP		 958 return r;
959}
960
961static void socket_unwatch_fds(Socket *s) {
962 SocketPort *p;
9152c765 963
034c6ed7
LP		 964 assert(s);
965
966 LIST_FOREACH(port, p, s->ports) {
967 if (p->fd < 0)
968 continue;
969
acbb0225 970 unit_unwatch_fd(UNIT(s), &p->fd_watch);
83c60c9f 971 }
034c6ed7
LP		 972}
973
974static int socket_watch_fds(Socket *s) {
975 SocketPort *p;
976 int r;
977
978 assert(s);
83c60c9f 979
034c6ed7
LP		 980 LIST_FOREACH(port, p, s->ports) {
981 if (p->fd < 0)
982 continue;
983
cabab516 984 p->fd_watch.socket_accept =
4f2d528d 985 s->accept &&
dd5ad9d4 986 p->type == SOCKET_SOCKET &&
4f2d528d
LP		 987 socket_address_can_accept(&p->address);
988
f94ea366 989 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
034c6ed7
LP		 990 goto fail;
991 }
83c60c9f 992
542563ba 993 return 0;
83c60c9f 994
034c6ed7
LP		 995fail:
996 socket_unwatch_fds(s);
997 return r;
998}
999
1000static void socket_set_state(Socket *s, SocketState state) {
1001 SocketState old_state;
1002 assert(s);
1003
1004 old_state = s->state;
1005 s->state = state;
1006
1007 if (state != SOCKET_START_PRE &&
1008 state != SOCKET_START_POST &&
1009 state != SOCKET_STOP_PRE &&
1010 state != SOCKET_STOP_PRE_SIGTERM &&
1011 state != SOCKET_STOP_PRE_SIGKILL &&
1012 state != SOCKET_STOP_POST &&
80876c20
LP		 1013 state != SOCKET_FINAL_SIGTERM &&
1014 state != SOCKET_FINAL_SIGKILL) {
acbb0225 1015 unit_unwatch_timer(UNIT(s), &s->timer_watch);
5e94833f 1016 socket_unwatch_control_pid(s);
034c6ed7 1017 s->control_command = NULL;
a16e1123 1018 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
e537352b 1019 }
034c6ed7 1020
a16e1123
LP		 1021 if (state != SOCKET_LISTENING)
1022 socket_unwatch_fds(s);
1023
034c6ed7
LP		 1024 if (state != SOCKET_START_POST &&
1025 state != SOCKET_LISTENING &&
1026 state != SOCKET_RUNNING &&
1027 state != SOCKET_STOP_PRE &&
1028 state != SOCKET_STOP_PRE_SIGTERM &&
1029 state != SOCKET_STOP_PRE_SIGKILL)
1030 socket_close_fds(s);
1031
e537352b 1032 if (state != old_state)
40d50879 1033 log_debug("%s changed %s -> %s",
a16e1123
LP		 1034 s->meta.id,
1035 socket_state_to_string(old_state),
1036 socket_state_to_string(state));
acbb0225 1037
e2f3b44c 1038 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
034c6ed7
LP		 1039}
1040
a16e1123
LP		 1041static int socket_coldplug(Unit *u) {
1042 Socket *s = SOCKET(u);
1043 int r;
1044
1045 assert(s);
1046 assert(s->state == SOCKET_DEAD);
1047
1048 if (s->deserialized_state != s->state) {
1049
1050 if (s->deserialized_state == SOCKET_START_PRE ||
1051 s->deserialized_state == SOCKET_START_POST ||
1052 s->deserialized_state == SOCKET_STOP_PRE ||
1053 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1054 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
1055 s->deserialized_state == SOCKET_STOP_POST ||
1056 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
1057 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
1058
1059 if (s->control_pid <= 0)
1060 return -EBADMSG;
1061
1062 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1063 return r;
1064
1065 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1066 return r;
1067 }
1068
1069 if (s->deserialized_state == SOCKET_START_POST ||
1070 s->deserialized_state == SOCKET_LISTENING ||
1071 s->deserialized_state == SOCKET_RUNNING ||
1072 s->deserialized_state == SOCKET_STOP_PRE ||
1073 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1074 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
1075 if ((r = socket_open_fds(s)) < 0)
1076 return r;
1077
1078 if (s->deserialized_state == SOCKET_LISTENING)
1079 if ((r = socket_watch_fds(s)) < 0)
1080 return r;
1081
1082 socket_set_state(s, s->deserialized_state);
1083 }
1084
1085 return 0;
1086}
1087
e537352b 1088static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
034c6ed7
LP		 1089 pid_t pid;
1090 int r;
9e2f7c11 1091 char **argv;
034c6ed7
LP		 1092
1093 assert(s);
1094 assert(c);
1095 assert(_pid);
1096
e537352b
LP		 1097 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1098 goto fail;
034c6ed7 1099
9e2f7c11
LP		 1100 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1101 r = -ENOMEM;
1102 goto fail;
1103 }
1104
1105 r = exec_spawn(c,
1106 argv,
1107 &s->exec_context,
1108 NULL, 0,
1137a57c 1109 s->meta.manager->environment,
9e2f7c11
LP		 1110 true,
1111 true,
1e3ad081 1112 true,
4cd1fbcc
LP		 1113 s->meta.manager->confirm_spawn,
1114 s->meta.cgroup_bondings,
ab1f0633 1115 s->meta.cgroup_attributes,
9e2f7c11
LP		 1116 &pid);
1117
1118 strv_free(argv);
1119 if (r < 0)
034c6ed7
LP		 1120 goto fail;
1121
87f0e418 1122 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
034c6ed7
LP		 1123 /* FIXME: we need to do something here */
1124 goto fail;
83c60c9f 1125
034c6ed7
LP		 1126 *_pid = pid;
1127
1128 return 0;
1129
1130fail:
e537352b 1131 unit_unwatch_timer(UNIT(s), &s->timer_watch);
83c60c9f
LP		 1132
1133 return r;
542563ba
LP		 1134}
1135
034c6ed7
LP		 1136static void socket_enter_dead(Socket *s, bool success) {
1137 assert(s);
1138
1139 if (!success)
1140 s->failure = true;
1141
fdf20a31 1142 socket_set_state(s, s->failure ? SOCKET_FAILED : SOCKET_DEAD);
034c6ed7
LP		 1143}
1144
80876c20
LP		 1145static void socket_enter_signal(Socket *s, SocketState state, bool success);
1146
034c6ed7
LP		 1147static void socket_enter_stop_post(Socket *s, bool success) {
1148 int r;
1149 assert(s);
1150
1151 if (!success)
1152 s->failure = true;
1153
5e94833f
LP		 1154 socket_unwatch_control_pid(s);
1155
a16e1123
LP		 1156 s->control_command_id = SOCKET_EXEC_STOP_POST;
1157
80876c20 1158 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
e537352b 1159 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1160 goto fail;
1161
80876c20
LP		 1162 socket_set_state(s, SOCKET_STOP_POST);
1163 } else
1164 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
034c6ed7
LP		 1165
1166 return;
1167
1168fail:
6cf6bbc2 1169 log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
80876c20 1170 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
034c6ed7
LP		 1171}
1172
1173static void socket_enter_signal(Socket *s, SocketState state, bool success) {
1174 int r;
ca949c9d
LP		 1175 Set *pid_set = NULL;
1176 bool wait_for_exit = false;
034c6ed7
LP		 1177
1178 assert(s);
1179
1180 if (!success)
1181 s->failure = true;
1182
2e22afe9
LP		 1183 if (s->exec_context.kill_mode != KILL_NONE) {
1184 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
034c6ed7 1185
ca949c9d 1186 if (s->control_pid > 0) {
cd25cce9 1187 if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
50159e6a 1188
ca949c9d
LP		 1189 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1190 else
1191 wait_for_exit = true;
034c6ed7 1192 }
50159e6a 1193
ca949c9d
LP		 1194 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1195
1196 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1197 r = -ENOMEM;
50159e6a
LP		 1198 goto fail;
1199 }
ca949c9d
LP		 1200
1201 /* Exclude the control pid from being killed via the cgroup */
1202 if (s->control_pid > 0)
1203 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1204 goto fail;
1205
430c18ed 1206 if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
ca949c9d
LP		 1207 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1208 log_warning("Failed to kill control group: %s", strerror(-r));
1209 } else if (r > 0)
1210 wait_for_exit = true;
1211
1212 set_free(pid_set);
da19d5c1 1213 pid_set = NULL;
ca949c9d 1214 }
d6ea93e3 1215 }
034c6ed7 1216
ca949c9d 1217 if (wait_for_exit) {
80876c20
LP		 1218 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1219 goto fail;
d6ea93e3 1220
80876c20
LP		 1221 socket_set_state(s, state);
1222 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1223 socket_enter_stop_post(s, true);
1224 else
034c6ed7
LP		 1225 socket_enter_dead(s, true);
1226
1227 return;
1228
1229fail:
9e2f7c11 1230 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1231
1232 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1233 socket_enter_stop_post(s, false);
1234 else
1235 socket_enter_dead(s, false);
ca949c9d
LP		 1236
1237 if (pid_set)
1238 set_free(pid_set);
034c6ed7
LP		 1239}
1240
1241static void socket_enter_stop_pre(Socket *s, bool success) {
1242 int r;
1243 assert(s);
1244
1245 if (!success)
1246 s->failure = true;
1247
5e94833f
LP		 1248 socket_unwatch_control_pid(s);
1249
a16e1123
LP		 1250 s->control_command_id = SOCKET_EXEC_STOP_PRE;
1251
80876c20 1252 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
e537352b 1253 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1254 goto fail;
1255
80876c20
LP		 1256 socket_set_state(s, SOCKET_STOP_PRE);
1257 } else
034c6ed7
LP		 1258 socket_enter_stop_post(s, true);
1259
1260 return;
1261
1262fail:
6cf6bbc2 1263 log_warning("%s failed to run 'stop-pre' task: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1264 socket_enter_stop_post(s, false);
1265}
1266
e9af15c3
LP		 1267static void socket_enter_listening(Socket *s) {
1268 int r;
1269 assert(s);
1270
1271 if ((r = socket_watch_fds(s)) < 0) {
9e2f7c11 1272 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
e9af15c3
LP		 1273 goto fail;
1274 }
1275
1276 socket_set_state(s, SOCKET_LISTENING);
1277 return;
1278
1279fail:
1280 socket_enter_stop_pre(s, false);
1281}
1282
034c6ed7
LP		 1283static void socket_enter_start_post(Socket *s) {
1284 int r;
1285 assert(s);
1286
e9af15c3 1287 if ((r = socket_open_fds(s)) < 0) {
9e2f7c11 1288 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1289 goto fail;
1290 }
1291
5e94833f
LP		 1292 socket_unwatch_control_pid(s);
1293
a16e1123
LP		 1294 s->control_command_id = SOCKET_EXEC_START_POST;
1295
80876c20 1296 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
e537352b 1297 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
6cf6bbc2 1298 log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1299 goto fail;
1300 }
1301
80876c20
LP		 1302 socket_set_state(s, SOCKET_START_POST);
1303 } else
e9af15c3 1304 socket_enter_listening(s);
034c6ed7
LP		 1305
1306 return;
1307
1308fail:
1309 socket_enter_stop_pre(s, false);
1310}
1311
1312static void socket_enter_start_pre(Socket *s) {
1313 int r;
1314 assert(s);
1315
5e94833f
LP		 1316 socket_unwatch_control_pid(s);
1317
a16e1123
LP		 1318 s->control_command_id = SOCKET_EXEC_START_PRE;
1319
80876c20 1320 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
e537352b 1321 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1322 goto fail;
1323
80876c20
LP		 1324 socket_set_state(s, SOCKET_START_PRE);
1325 } else
034c6ed7
LP		 1326 socket_enter_start_post(s);
1327
1328 return;
1329
1330fail:
6cf6bbc2 1331 log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1332 socket_enter_dead(s, false);
1333}
1334
4f2d528d 1335static void socket_enter_running(Socket *s, int cfd) {
034c6ed7 1336 int r;
398ef8ba 1337 DBusError error;
034c6ed7
LP		 1338
1339 assert(s);
398ef8ba 1340 dbus_error_init(&error);
034c6ed7 1341
ba3e67a7
LP		 1342 /* We don't take connections anymore if we are supposed to
1343 * shut down anyway */
18ffdfda 1344 if (unit_pending_inactive(UNIT(s))) {
5d909e3e
LP		 1345 log_debug("Suppressing connection request on %s since unit stop is scheduled.", s->meta.id);
1346
7c610628
LP		 1347 if (cfd >= 0)
1348 close_nointr_nofail(cfd);
1349 else {
1350 /* Flush all sockets by closing and reopening them */
1351 socket_close_fds(s);
1352
1353 if ((r = socket_watch_fds(s)) < 0) {
1354 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
1355 socket_enter_stop_pre(s, false);
1356 }
1357 }
1358
ba3e67a7
LP		 1359 return;
1360 }
1361
4f2d528d 1362 if (cfd < 0) {
f976f3f6
LP		 1363 bool pending = false;
1364 Meta *i;
1365
1366 /* If there's already a start pending don't bother to
1367 * do anything */
ab5c3e3f 1368 LIST_FOREACH(units_by_type, i, s->meta.manager->units_by_type[UNIT_SERVICE]) {
f976f3f6
LP		 1369 Service *service = (Service *) i;
1370
1371 if (!set_get(service->configured_sockets, s))
1372 continue;
1373
1374 if (!unit_pending_active(UNIT(service)))
1375 continue;
1376
1377 pending = true;
1378 break;
1379 }
1380
1381 if (!pending)
1382 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, &error, NULL)) < 0)
1383 goto fail;
4f2d528d
LP		 1384
1385 socket_set_state(s, SOCKET_RUNNING);
1386 } else {
b4f10a5e 1387 char *prefix, *instance = NULL, *name;
b15bdda8 1388 Service *service;
4f2d528d 1389
6cf6bbc2
LP		 1390 if (s->n_connections >= s->max_connections) {
1391 log_warning("Too many incoming connections (%u)", s->n_connections);
1392 close_nointr_nofail(cfd);
1393 return;
1394 }
1395
b15bdda8
LP		 1396 if ((r = socket_instantiate_service(s)) < 0)
1397 goto fail;
1398
1399 if ((r = instance_from_socket(cfd, s->n_accepted, &instance)) < 0)
4f2d528d
LP		 1400 goto fail;
1401
4cd1fbcc 1402 if (!(prefix = unit_name_to_prefix(s->meta.id))) {
4f2d528d
LP		 1403 free(instance);
1404 r = -ENOMEM;
1405 goto fail;
1406 }
1407
1408 name = unit_name_build(prefix, instance, ".service");
1409 free(prefix);
1410 free(instance);
1411
b6dbbe1c 1412 if (!name) {
4f2d528d 1413 r = -ENOMEM;
b6dbbe1c
LP		 1414 goto fail;
1415 }
4f2d528d 1416
b15bdda8
LP		 1417 if ((r = unit_add_name(UNIT(s->service), name)) < 0) {
1418 free(name);
4f2d528d 1419 goto fail;
b15bdda8
LP		 1420 }
1421
1422 service = s->service;
1423 s->service = NULL;
1424 s->n_accepted ++;
4f2d528d 1425
6c073082
LP		 1426 service->meta.no_gc = false;
1427
b15bdda8
LP		 1428 unit_choose_id(UNIT(service), name);
1429 free(name);
1430
1431 if ((r = service_set_socket_fd(service, cfd, s)) < 0)
4f2d528d
LP		 1432 goto fail;
1433
1434 cfd = -1;
6cf6bbc2
LP		 1435 s->n_connections ++;
1436
b15bdda8 1437 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(service), JOB_REPLACE, true, &error, NULL)) < 0)
4f2d528d 1438 goto fail;
c4e2ceae
LP		 1439
1440 /* Notify clients about changed counters */
1441 unit_add_to_dbus_queue(UNIT(s));
4f2d528d 1442 }
034c6ed7 1443
034c6ed7
LP		 1444 return;
1445
1446fail:
398ef8ba 1447 log_warning("%s failed to queue socket startup job: %s", s->meta.id, bus_error(&error, r));
80876c20 1448 socket_enter_stop_pre(s, false);
4f2d528d
LP		 1449
1450 if (cfd >= 0)
1451 close_nointr_nofail(cfd);
398ef8ba
LP		 1452
1453 dbus_error_free(&error);
034c6ed7
LP		 1454}
1455
1456static void socket_run_next(Socket *s, bool success) {
1457 int r;
1458
1459 assert(s);
1460 assert(s->control_command);
1461 assert(s->control_command->command_next);
1462
1463 if (!success)
1464 s->failure = true;
1465
5e94833f
LP		 1466 socket_unwatch_control_pid(s);
1467
034c6ed7
LP		 1468 s->control_command = s->control_command->command_next;
1469
e537352b 1470 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1471 goto fail;
1472
1473 return;
1474
1475fail:
6cf6bbc2 1476 log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
80876c20
LP		 1477
1478 if (s->state == SOCKET_START_POST)
1479 socket_enter_stop_pre(s, false);
034c6ed7
LP		 1480 else if (s->state == SOCKET_STOP_POST)
1481 socket_enter_dead(s, false);
1482 else
80876c20 1483 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
034c6ed7
LP		 1484}
1485
87f0e418
LP		 1486static int socket_start(Unit *u) {
1487 Socket *s = SOCKET(u);
83c60c9f
LP		 1488
1489 assert(s);
1490
034c6ed7
LP		 1491 /* We cannot fulfill this request right now, try again later
1492 * please! */
1493 if (s->state == SOCKET_STOP_PRE ||
1494 s->state == SOCKET_STOP_PRE_SIGKILL ||
1495 s->state == SOCKET_STOP_PRE_SIGTERM ||
1496 s->state == SOCKET_STOP_POST ||
80876c20
LP		 1497 s->state == SOCKET_FINAL_SIGTERM ||
1498 s->state == SOCKET_FINAL_SIGKILL)
034c6ed7
LP		 1499 return -EAGAIN;
1500
83c60c9f
LP		 1501 if (s->state == SOCKET_START_PRE ||
1502 s->state == SOCKET_START_POST)
034c6ed7 1503 return 0;
83c60c9f 1504
034c6ed7 1505 /* Cannot run this without the service being around */
4f2d528d 1506 if (s->service) {
4ac9236f
LP		 1507 if (s->service->meta.load_state != UNIT_LOADED) {
1508 log_error("Socket service %s not loaded, refusing.", s->service->meta.id);
4f2d528d 1509 return -ENOENT;
4ac9236f 1510 }
4f2d528d 1511
35b8ca3a 1512 /* If the service is already active we cannot start the
4f2d528d
LP		 1513 * socket */
1514 if (s->service->state != SERVICE_DEAD &&
fdf20a31 1515 s->service->state != SERVICE_FAILED &&
4ac9236f
LP		 1516 s->service->state != SERVICE_AUTO_RESTART) {
1517 log_error("Socket service %s already active, refusing.", s->service->meta.id);
4f2d528d 1518 return -EBUSY;
4ac9236f 1519 }
7b4bf06b
LP		 1520
1521#ifdef HAVE_SYSV_COMPAT
1522 if (s->service->sysv_path) {
1523 log_error("Using SysV services for socket activation is not supported. Refusing.");
1524 return -ENOENT;
1525 }
1526#endif
4f2d528d 1527 }
e537352b 1528
fdf20a31 1529 assert(s->state == SOCKET_DEAD || s->state == SOCKET_FAILED);
83c60c9f 1530
034c6ed7
LP		 1531 s->failure = false;
1532 socket_enter_start_pre(s);
1533 return 0;
1534}
83c60c9f 1535
87f0e418
LP		 1536static int socket_stop(Unit *u) {
1537 Socket *s = SOCKET(u);
034c6ed7
LP		 1538
1539 assert(s);
1540
e537352b
LP		 1541 /* Already on it */
1542 if (s->state == SOCKET_STOP_PRE ||
1543 s->state == SOCKET_STOP_PRE_SIGTERM ||
1544 s->state == SOCKET_STOP_PRE_SIGKILL ||
1545 s->state == SOCKET_STOP_POST ||
80876c20 1546 s->state == SOCKET_FINAL_SIGTERM ||
3f6c78dc 1547 s->state == SOCKET_FINAL_SIGKILL)
e537352b
LP		 1548 return 0;
1549
3f6c78dc
LP		 1550 /* If there's already something running we go directly into
1551 * kill mode. */
1552 if (s->state == SOCKET_START_PRE ||
1553 s->state == SOCKET_START_POST) {
1554 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, true);
1555 return -EAGAIN;
1556 }
1557
034c6ed7 1558 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
83c60c9f 1559
034c6ed7 1560 socket_enter_stop_pre(s, true);
542563ba
LP		 1561 return 0;
1562}
1563
a16e1123
LP		 1564static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1565 Socket *s = SOCKET(u);
1566 SocketPort *p;
1567 int r;
1568
1569 assert(u);
1570 assert(f);
1571 assert(fds);
1572
1573 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1574 unit_serialize_item(u, f, "failure", yes_no(s->failure));
1575 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1576
1577 if (s->control_pid > 0)
5925dd3c 1578 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
a16e1123
LP		 1579
1580 if (s->control_command_id >= 0)
1581 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1582
1583 LIST_FOREACH(port, p, s->ports) {
1584 int copy;
1585
1586 if (p->fd < 0)
1587 continue;
1588
1589 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1590 return copy;
1591
1592 if (p->type == SOCKET_SOCKET) {
1593 char *t;
1594
1595 if ((r = socket_address_print(&p->address, &t)) < 0)
1596 return r;
1597
7a22745a
LP		 1598 if (socket_address_family(&p->address) == AF_NETLINK)
1599 unit_serialize_item_format(u, f, "netlink", "%i %s", copy, t);
1600 else
1601 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
a16e1123 1602 free(t);
b0a3f2bc
LP		 1603 } else if (p->type == SOCKET_SPECIAL)
1604 unit_serialize_item_format(u, f, "special", "%i %s", copy, p->path);
1605 else {
a16e1123
LP		 1606 assert(p->type == SOCKET_FIFO);
1607 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1608 }
1609 }
1610
1611 return 0;
1612}
1613
1614static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1615 Socket *s = SOCKET(u);
a16e1123
LP		 1616
1617 assert(u);
1618 assert(key);
1619 assert(value);
1620 assert(fds);
1621
1622 if (streq(key, "state")) {
1623 SocketState state;
1624
1625 if ((state = socket_state_from_string(value)) < 0)
1626 log_debug("Failed to parse state value %s", value);
1627 else
1628 s->deserialized_state = state;
1629 } else if (streq(key, "failure")) {
1630 int b;
1631
1632 if ((b = parse_boolean(value)) < 0)
1633 log_debug("Failed to parse failure value %s", value);
1634 else
1635 s->failure = b || s->failure;
1636
1637 } else if (streq(key, "n-accepted")) {
1638 unsigned k;
1639
e364ad06 1640 if (safe_atou(value, &k) < 0)
a16e1123
LP		 1641 log_debug("Failed to parse n-accepted value %s", value);
1642 else
1643 s->n_accepted += k;
1644 } else if (streq(key, "control-pid")) {
5925dd3c 1645 pid_t pid;
a16e1123 1646
e364ad06 1647 if (parse_pid(value, &pid) < 0)
a16e1123
LP		 1648 log_debug("Failed to parse control-pid value %s", value);
1649 else
5925dd3c 1650 s->control_pid = pid;
a16e1123
LP		 1651 } else if (streq(key, "control-command")) {
1652 SocketExecCommand id;
1653
1654 if ((id = socket_exec_command_from_string(value)) < 0)
1655 log_debug("Failed to parse exec-command value %s", value);
1656 else {
1657 s->control_command_id = id;
1658 s->control_command = s->exec_command[id];
1659 }
1660 } else if (streq(key, "fifo")) {
1661 int fd, skip = 0;
1662 SocketPort *p;
1663
1664 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1665 log_debug("Failed to parse fifo value %s", value);
1666 else {
1667
1668 LIST_FOREACH(port, p, s->ports)
b0a3f2bc
LP		 1669 if (p->type == SOCKET_FIFO &&
1670 streq_ptr(p->path, value+skip))
1671 break;
1672
1673 if (p) {
1674 if (p->fd >= 0)
1675 close_nointr_nofail(p->fd);
1676 p->fd = fdset_remove(fds, fd);
1677 }
1678 }
1679
1680 } else if (streq(key, "special")) {
1681 int fd, skip = 0;
1682 SocketPort *p;
1683
1684 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1685 log_debug("Failed to parse special value %s", value);
1686 else {
1687
1688 LIST_FOREACH(port, p, s->ports)
1689 if (p->type == SOCKET_SPECIAL &&
1690 streq_ptr(p->path, value+skip))
a16e1123
LP		 1691 break;
1692
1693 if (p) {
1694 if (p->fd >= 0)
1695 close_nointr_nofail(p->fd);
1696 p->fd = fdset_remove(fds, fd);
1697 }
1698 }
1699
1700 } else if (streq(key, "socket")) {
27ca8d7a 1701 int fd, type, skip = 0;
a16e1123
LP		 1702 SocketPort *p;
1703
27ca8d7a 1704 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
a16e1123
LP		 1705 log_debug("Failed to parse socket value %s", value);
1706 else {
1707
1708 LIST_FOREACH(port, p, s->ports)
27ca8d7a 1709 if (socket_address_is(&p->address, value+skip, type))
a16e1123
LP		 1710 break;
1711
1712 if (p) {
1713 if (p->fd >= 0)
1714 close_nointr_nofail(p->fd);
1715 p->fd = fdset_remove(fds, fd);
1716 }
1717 }
1718
7a22745a
LP		 1719 } else if (streq(key, "netlink")) {
1720 int fd, skip = 0;
1721 SocketPort *p;
1722
1723 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1724 log_debug("Failed to parse socket value %s", value);
1725 else {
1726
1727 LIST_FOREACH(port, p, s->ports)
1728 if (socket_address_is_netlink(&p->address, value+skip))
1729 break;
1730
1731 if (p) {
1732 if (p->fd >= 0)
1733 close_nointr_nofail(p->fd);
1734 p->fd = fdset_remove(fds, fd);
1735 }
1736 }
1737
a16e1123
LP		 1738 } else
1739 log_debug("Unknown serialization key '%s'", key);
1740
1741 return 0;
1742}
1743
87f0e418
LP		 1744static UnitActiveState socket_active_state(Unit *u) {
1745 assert(u);
5cb5a6ff 1746
acbb0225 1747 return state_translation_table[SOCKET(u)->state];
5cb5a6ff
LP		 1748}
1749
10a94420
LP		 1750static const char *socket_sub_state_to_string(Unit *u) {
1751 assert(u);
1752
a16e1123 1753 return socket_state_to_string(SOCKET(u)->state);
10a94420
LP		 1754}
1755
6cf6bbc2
LP		 1756static bool socket_check_gc(Unit *u) {
1757 Socket *s = SOCKET(u);
1758
1759 assert(u);
1760
1761 return s->n_connections > 0;
1762}
1763
acbb0225 1764static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
87f0e418 1765 Socket *s = SOCKET(u);
4f2d528d 1766 int cfd = -1;
9152c765 1767
034c6ed7 1768 assert(s);
8d567588 1769 assert(fd >= 0);
9152c765 1770
871d7de4
LP		 1771 if (s->state != SOCKET_LISTENING)
1772 return;
1773
9e2f7c11 1774 log_debug("Incoming traffic on %s", u->meta.id);
9152c765 1775
4f2d528d 1776 if (events != EPOLLIN) {
641e01dc
LP		 1777
1778 if (events & EPOLLHUP)
1779 log_error("%s: Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that.", u->meta.id);
1780 else
1781 log_error("%s: Got unexpected poll event (0x%x) on socket.", u->meta.id, events);
1782
8d567588 1783 goto fail;
4f2d528d
LP		 1784 }
1785
cabab516 1786 if (w->socket_accept) {
4f2d528d
LP		 1787 for (;;) {
1788
1789 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1790
1791 if (errno == EINTR)
1792 continue;
1793
1794 log_error("Failed to accept socket: %m");
8d567588 1795 goto fail;
4f2d528d
LP		 1796 }
1797
1798 break;
1799 }
4fd5948e
LP		 1800
1801 socket_apply_socket_options(s, cfd);
4f2d528d 1802 }
9152c765 1803
4f2d528d 1804 socket_enter_running(s, cfd);
8d567588
LP		 1805 return;
1806
1807fail:
1808 socket_enter_stop_pre(s, false);
9152c765
LP		 1809}
1810
87f0e418
LP		 1811static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1812 Socket *s = SOCKET(u);
034c6ed7 1813 bool success;
5cb5a6ff
LP		 1814
1815 assert(s);
034c6ed7 1816 assert(pid >= 0);
5cb5a6ff 1817
8c47c732
LP		 1818 if (pid != s->control_pid)
1819 return;
542563ba 1820
034c6ed7
LP		 1821 s->control_pid = 0;
1822
8c47c732 1823 success = is_clean_exit(code, status);
8c47c732 1824
b708e7ce 1825 if (s->control_command) {
6ea832a2 1826 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
a16e1123 1827
b708e7ce
LP		 1828 if (s->control_command->ignore)
1829 success = true;
1830 }
1831
92abbefb
LP		 1832 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1833 "%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
b708e7ce 1834 s->failure = s->failure || !success;
034c6ed7 1835
a16e1123
LP		 1836 if (s->control_command && s->control_command->command_next && success) {
1837 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
034c6ed7 1838 socket_run_next(s, success);
acbb0225 1839 } else {
a16e1123
LP		 1840 s->control_command = NULL;
1841 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1842
034c6ed7
LP		 1843 /* No further commands for this step, so let's figure
1844 * out what to do next */
5cb5a6ff 1845
a16e1123 1846 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
acbb0225 1847
034c6ed7
LP		 1848 switch (s->state) {
1849
1850 case SOCKET_START_PRE:
1851 if (success)
acbb0225 1852 socket_enter_start_post(s);
034c6ed7 1853 else
80876c20 1854 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
034c6ed7
LP		 1855 break;
1856
1857 case SOCKET_START_POST:
1858 if (success)
e9af15c3 1859 socket_enter_listening(s);
034c6ed7
LP		 1860 else
1861 socket_enter_stop_pre(s, false);
1862 break;
1863
1864 case SOCKET_STOP_PRE:
1865 case SOCKET_STOP_PRE_SIGTERM:
1866 case SOCKET_STOP_PRE_SIGKILL:
1867 socket_enter_stop_post(s, success);
1868 break;
1869
1870 case SOCKET_STOP_POST:
80876c20
LP		 1871 case SOCKET_FINAL_SIGTERM:
1872 case SOCKET_FINAL_SIGKILL:
034c6ed7
LP		 1873 socket_enter_dead(s, success);
1874 break;
1875
1876 default:
1877 assert_not_reached("Uh, control process died at wrong time.");
1878 }
1879 }
c4e2ceae
LP		 1880
1881 /* Notify clients about changed exit status */
1882 unit_add_to_dbus_queue(u);
034c6ed7 1883}
5cb5a6ff 1884
acbb0225 1885static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
87f0e418 1886 Socket *s = SOCKET(u);
5cb5a6ff 1887
034c6ed7
LP		 1888 assert(s);
1889 assert(elapsed == 1);
acbb0225 1890 assert(w == &s->timer_watch);
034c6ed7
LP		 1891
1892 switch (s->state) {
1893
1894 case SOCKET_START_PRE:
9e2f7c11 1895 log_warning("%s starting timed out. Terminating.", u->meta.id);
80876c20 1896 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
da19d5c1 1897 break;
80876c20 1898
034c6ed7 1899 case SOCKET_START_POST:
9e2f7c11 1900 log_warning("%s starting timed out. Stopping.", u->meta.id);
034c6ed7
LP		 1901 socket_enter_stop_pre(s, false);
1902 break;
1903
1904 case SOCKET_STOP_PRE:
9e2f7c11 1905 log_warning("%s stopping timed out. Terminating.", u->meta.id);
034c6ed7
LP		 1906 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1907 break;
1908
1909 case SOCKET_STOP_PRE_SIGTERM:
ba035df2
LP		 1910 if (s->exec_context.send_sigkill) {
1911 log_warning("%s stopping timed out. Killing.", u->meta.id);
1912 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1913 } else {
1914 log_warning("%s stopping timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1915 socket_enter_stop_post(s, false);
1916 }
034c6ed7
LP		 1917 break;
1918
1919 case SOCKET_STOP_PRE_SIGKILL:
9e2f7c11 1920 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
034c6ed7
LP		 1921 socket_enter_stop_post(s, false);
1922 break;
1923
1924 case SOCKET_STOP_POST:
9e2f7c11 1925 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
80876c20 1926 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
034c6ed7
LP		 1927 break;
1928
80876c20 1929 case SOCKET_FINAL_SIGTERM:
ba035df2
LP		 1930 if (s->exec_context.send_sigkill) {
1931 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1932 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1933 } else {
1934 log_warning("%s stopping timed out (2). Skipping SIGKILL. Ignoring.", u->meta.id);
1935 socket_enter_dead(s, false);
1936 }
034c6ed7
LP		 1937 break;
1938
80876c20 1939 case SOCKET_FINAL_SIGKILL:
fdf20a31 1940 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
034c6ed7
LP		 1941 socket_enter_dead(s, false);
1942 break;
1943
1944 default:
1945 assert_not_reached("Timeout at wrong time.");
1946 }
5cb5a6ff
LP		 1947}
1948
44d8db9e
LP		 1949int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1950 int *rfds;
1951 unsigned rn_fds, k;
1952 SocketPort *p;
1953
1954 assert(s);
1955 assert(fds);
1956 assert(n_fds);
1957
1958 /* Called from the service code for requesting our fds */
1959
1960 rn_fds = 0;
1961 LIST_FOREACH(port, p, s->ports)
1962 if (p->fd >= 0)
1963 rn_fds++;
1964
e364ad06 1965 if (!(rfds = new(int, rn_fds)))
44d8db9e
LP		 1966 return -ENOMEM;
1967
1968 k = 0;
1969 LIST_FOREACH(port, p, s->ports)
1970 if (p->fd >= 0)
1971 rfds[k++] = p->fd;
1972
1973 assert(k == rn_fds);
1974
1975 *fds = rfds;
1976 *n_fds = rn_fds;
1977
1978 return 0;
1979}
1980
ceee3d82
LP		 1981void socket_notify_service_dead(Socket *s) {
1982 assert(s);
1983
6cf6bbc2
LP		 1984 /* The service is dead. Dang!
1985 *
1986 * This is strictly for one-instance-for-all-connections
1987 * services. */
ceee3d82
LP		 1988
1989 if (s->state == SOCKET_RUNNING) {
9e2f7c11 1990 log_debug("%s got notified about service death.", s->meta.id);
ceee3d82
LP		 1991 socket_enter_listening(s);
1992 }
1993}
1994
6cf6bbc2
LP		 1995void socket_connection_unref(Socket *s) {
1996 assert(s);
1997
1998 /* The service is dead. Yay!
1999 *
35b8ca3a 2000 * This is strictly for one-instance-per-connection
6cf6bbc2
LP		 2001 * services. */
2002
2003 assert(s->n_connections > 0);
2004 s->n_connections--;
2005
2006 log_debug("%s: One connection closed, %u left.", s->meta.id, s->n_connections);
2007}
2008
fdf20a31 2009static void socket_reset_failed(Unit *u) {
5632e374
LP		 2010 Socket *s = SOCKET(u);
2011
2012 assert(s);
2013
fdf20a31 2014 if (s->state == SOCKET_FAILED)
5632e374
LP		 2015 socket_set_state(s, SOCKET_DEAD);
2016
2017 s->failure = false;
2018}
2019
8a0867d6
LP		 2020static int socket_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
2021 Socket *s = SOCKET(u);
2022 int r = 0;
2023 Set *pid_set = NULL;
2024
2025 assert(s);
2026
2027 if (who == KILL_MAIN) {
2028 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Socket units have no main processes");
a17204af 2029 return -ESRCH;
8a0867d6
LP		 2030 }
2031
2032 if (s->control_pid <= 0 && who == KILL_CONTROL) {
2033 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
a17204af 2034 return -ESRCH;
8a0867d6
LP		 2035 }
2036
3611581e
LP		 2037 if (who == KILL_CONTROL || who == KILL_ALL)
2038 if (s->control_pid > 0)
2039 if (kill(s->control_pid, signo) < 0)
2040 r = -errno;
8a0867d6 2041
3611581e 2042 if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
8a0867d6
LP		 2043 int q;
2044
2045 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
2046 return -ENOMEM;
2047
2048 /* Exclude the control pid from being killed via the cgroup */
2049 if (s->control_pid > 0)
2050 if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
2051 r = q;
2052 goto finish;
2053 }
2054
430c18ed 2055 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, false, pid_set)) < 0)
3611581e 2056 if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
8a0867d6
LP		 2057 r = q;
2058 }
2059
2060finish:
2061 if (pid_set)
2062 set_free(pid_set);
2063
2064 return r;
2065}
2066
a16e1123
LP		 2067static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
2068 [SOCKET_DEAD] = "dead",
2069 [SOCKET_START_PRE] = "start-pre",
2070 [SOCKET_START_POST] = "start-post",
2071 [SOCKET_LISTENING] = "listening",
2072 [SOCKET_RUNNING] = "running",
2073 [SOCKET_STOP_PRE] = "stop-pre",
2074 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
2075 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
2076 [SOCKET_STOP_POST] = "stop-post",
2077 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
2078 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
fdf20a31 2079 [SOCKET_FAILED] = "failed"
a16e1123
LP		 2080};
2081
2082DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
2083
2084static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
2085 [SOCKET_EXEC_START_PRE] = "StartPre",
2086 [SOCKET_EXEC_START_POST] = "StartPost",
2087 [SOCKET_EXEC_STOP_PRE] = "StopPre",
2088 [SOCKET_EXEC_STOP_POST] = "StopPost"
2089};
2090
2091DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
2092
87f0e418 2093const UnitVTable socket_vtable = {
5cb5a6ff 2094 .suffix = ".socket",
f975e971
LP		 2095 .sections =
2096 "Unit\0"
2097 "Socket\0"
2098 "Install\0",
5cb5a6ff 2099
034c6ed7
LP		 2100 .init = socket_init,
2101 .done = socket_done,
a16e1123
LP		 2102 .load = socket_load,
2103
8a0867d6
LP		 2104 .kill = socket_kill,
2105
a16e1123 2106 .coldplug = socket_coldplug,
034c6ed7 2107
5cb5a6ff
LP		 2108 .dump = socket_dump,
2109
542563ba
LP		 2110 .start = socket_start,
2111 .stop = socket_stop,
5cb5a6ff 2112
a16e1123
LP		 2113 .serialize = socket_serialize,
2114 .deserialize_item = socket_deserialize_item,
2115
5cb5a6ff 2116 .active_state = socket_active_state,
10a94420 2117 .sub_state_to_string = socket_sub_state_to_string,
5cb5a6ff 2118
6cf6bbc2
LP		 2119 .check_gc = socket_check_gc,
2120
9152c765 2121 .fd_event = socket_fd_event,
034c6ed7 2122 .sigchld_event = socket_sigchld_event,
4139c1b2
LP		 2123 .timer_event = socket_timer_event,
2124
fdf20a31 2125 .reset_failed = socket_reset_failed,
5632e374 2126
c4e2ceae
LP		 2127 .bus_interface = "org.freedesktop.systemd1.Socket",
2128 .bus_message_handler = bus_socket_message_handler,
2129 .bus_invalidating_properties = bus_socket_invalidating_properties
5cb5a6ff 2130};
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