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strv: Fix gcc unitialized variable warning
[thirdparty/systemd.git] / src / socket.c
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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>
83c60c9f 30
87f0e418 31#include "unit.h"
5cb5a6ff 32#include "socket.h"
cebf8b20 33#include "netinet/tcp.h"
83c60c9f 34#include "log.h"
23a177ef
LP		 35#include "load-dropin.h"
36#include "load-fragment.h"
9e2f7c11 37#include "strv.h"
4f2d528d 38#include "unit-name.h"
4139c1b2 39#include "dbus-socket.h"
4fd5948e 40#include "missing.h"
a40eb732 41#include "special.h"
398ef8ba 42#include "bus-errors.h"
e51bc1a2 43#include "label.h"
9a57c629 44#include "exit-status.h"
f6a6225e 45#include "def.h"
83c60c9f 46
acbb0225 47static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
87f0e418
LP		 48 [SOCKET_DEAD] = UNIT_INACTIVE,
49 [SOCKET_START_PRE] = UNIT_ACTIVATING,
50 [SOCKET_START_POST] = UNIT_ACTIVATING,
51 [SOCKET_LISTENING] = UNIT_ACTIVE,
52 [SOCKET_RUNNING] = UNIT_ACTIVE,
53 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
54 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
55 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
56 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
80876c20
LP		 57 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
58 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
fdf20a31 59 [SOCKET_FAILED] = UNIT_FAILED
83c60c9f 60};
5cb5a6ff 61
a16e1123
LP		 62static void socket_init(Unit *u) {
63 Socket *s = SOCKET(u);
64
65 assert(u);
66 assert(u->meta.load_state == UNIT_STUB);
67
a16e1123
LP		 68 s->backlog = SOMAXCONN;
69 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
70 s->directory_mode = 0755;
973bcd30 71 s->socket_mode = 0777;
a16e1123 72
6cf6bbc2
LP		 73 s->max_connections = 64;
74
4fd5948e 75 s->priority = -1;
4fd5948e
LP		 76 s->ip_tos = -1;
77 s->ip_ttl = -1;
4fd5948e 78 s->mark = -1;
4fd5948e 79
a16e1123 80 exec_context_init(&s->exec_context);
0a494f1f
LP		 81 s->exec_context.std_output = u->meta.manager->default_std_output;
82 s->exec_context.std_error = u->meta.manager->default_std_error;
a16e1123
LP		 83
84 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
85}
acbb0225 86
5e94833f
LP		 87static void socket_unwatch_control_pid(Socket *s) {
88 assert(s);
89
90 if (s->control_pid <= 0)
91 return;
92
93 unit_unwatch_pid(UNIT(s), s->control_pid);
94 s->control_pid = 0;
95}
96
87f0e418
LP		 97static void socket_done(Unit *u) {
98 Socket *s = SOCKET(u);
034c6ed7 99 SocketPort *p;
6cf6bbc2 100 Meta *i;
034c6ed7
LP		 101
102 assert(s);
103
104 while ((p = s->ports)) {
105 LIST_REMOVE(SocketPort, port, s->ports, p);
106
a16e1123
LP		 107 if (p->fd >= 0) {
108 unit_unwatch_fd(UNIT(s), &p->fd_watch);
109 close_nointr_nofail(p->fd);
110 }
111
034c6ed7
LP		 112 free(p->path);
113 free(p);
114 }
115
116 exec_context_done(&s->exec_context);
e537352b 117 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
034c6ed7
LP		 118 s->control_command = NULL;
119
5e94833f 120 socket_unwatch_control_pid(s);
034c6ed7
LP		 121
122 s->service = NULL;
123
cebf8b20
TT		 124 free(s->tcp_congestion);
125 s->tcp_congestion = NULL;
126
acbb0225 127 free(s->bind_to_device);
e537352b 128 s->bind_to_device = NULL;
acbb0225
LP		 129
130 unit_unwatch_timer(u, &s->timer_watch);
6cf6bbc2
LP		 131
132 /* Make sure no service instance refers to us anymore. */
133 LIST_FOREACH(units_per_type, i, u->meta.manager->units_per_type[UNIT_SERVICE]) {
134 Service *service = (Service *) i;
135
f976f3f6
LP		 136 if (service->accept_socket == s)
137 service->accept_socket = NULL;
138
139 set_remove(service->configured_sockets, s);
6cf6bbc2 140 }
5cb5a6ff
LP		 141}
142
b15bdda8
LP		 143static int socket_instantiate_service(Socket *s) {
144 char *prefix, *name;
145 int r;
146 Unit *u;
147
148 assert(s);
149
150 /* This fills in s->service if it isn't filled in yet. For
151 * Accept=yes sockets we create the next connection service
152 * here. For Accept=no this is mostly a NOP since the service
153 * is figured out at load time anyway. */
154
155 if (s->service)
156 return 0;
157
158 assert(s->accept);
159
160 if (!(prefix = unit_name_to_prefix(s->meta.id)))
161 return -ENOMEM;
162
163 r = asprintf(&name, "%s@%u.service", prefix, s->n_accepted);
164 free(prefix);
165
166 if (r < 0)
167 return -ENOMEM;
168
169 r = manager_load_unit(s->meta.manager, name, NULL, NULL, &u);
170 free(name);
171
172 if (r < 0)
173 return r;
174
7b4bf06b
LP		 175#ifdef HAVE_SYSV_COMPAT
176 if (SERVICE(u)->sysv_path) {
177 log_error("Using SysV services for socket activation is not supported. Refusing.");
178 return -ENOENT;
179 }
180#endif
181
6c073082 182 u->meta.no_gc = true;
b15bdda8
LP		 183 s->service = SERVICE(u);
184 return 0;
185}
186
4f2d528d
LP		 187static bool have_non_accept_socket(Socket *s) {
188 SocketPort *p;
189
190 assert(s);
191
192 if (!s->accept)
193 return true;
194
dd5ad9d4
LP		 195 LIST_FOREACH(port, p, s->ports) {
196
197 if (p->type != SOCKET_SOCKET)
198 return true;
199
4f2d528d
LP		 200 if (!socket_address_can_accept(&p->address))
201 return true;
dd5ad9d4 202 }
4f2d528d
LP		 203
204 return false;
205}
206
207static int socket_verify(Socket *s) {
208 assert(s);
209
4cd1fbcc 210 if (s->meta.load_state != UNIT_LOADED)
4f2d528d
LP		 211 return 0;
212
213 if (!s->ports) {
4cd1fbcc 214 log_error("%s lacks Listen setting. Refusing.", s->meta.id);
4f2d528d
LP		 215 return -EINVAL;
216 }
217
0009d2a6
LP		 218 if (s->accept && have_non_accept_socket(s)) {
219 log_error("%s configured for accepting sockets, but sockets are non-accepting. Refusing.", s->meta.id);
220 return -EINVAL;
221 }
222
6cf6bbc2 223 if (s->accept && s->max_connections <= 0) {
4d0e5dbd
LP		 224 log_error("%s's MaxConnection setting too small. Refusing.", s->meta.id);
225 return -EINVAL;
226 }
227
d9ff321a
LP		 228 if (s->accept && s->service) {
229 log_error("Explicit service configuration for accepting sockets not supported on %s. Refusing.", s->meta.id);
230 return -EINVAL;
231 }
232
2e22afe9 233 if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
4d0e5dbd 234 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
6cf6bbc2
LP		 235 return -EINVAL;
236 }
237
4f2d528d
LP		 238 return 0;
239}
240
6e2ef85b
LP		 241static bool socket_needs_mount(Socket *s, const char *prefix) {
242 SocketPort *p;
243
244 assert(s);
245
246 LIST_FOREACH(port, p, s->ports) {
247
248 if (p->type == SOCKET_SOCKET) {
249 if (socket_address_needs_mount(&p->address, prefix))
250 return true;
251 } else {
b0a3f2bc 252 assert(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
286 LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
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
TT		 406 "%sFreeBind: %s\n"
407 "%sTCPCongestion: %s\n",
a16e1123 408 prefix, socket_state_to_string(s->state),
c0120d99 409 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
b5a0699f
LP		 410 prefix, s->backlog,
411 prefix, s->socket_mode,
4fd5948e
LP		 412 prefix, s->directory_mode,
413 prefix, yes_no(s->keep_alive),
cebf8b20 414 prefix, yes_no(s->free_bind),
83a95334 415 prefix, strna(s->tcp_congestion));
542563ba 416
70123e68
LP		 417 if (s->control_pid > 0)
418 fprintf(f,
bb00e604
LP		 419 "%sControl PID: %lu\n",
420 prefix, (unsigned long) s->control_pid);
70123e68 421
acbb0225
LP		 422 if (s->bind_to_device)
423 fprintf(f,
424 "%sBindToDevice: %s\n",
425 prefix, s->bind_to_device);
426
4f2d528d
LP		 427 if (s->accept)
428 fprintf(f,
6cf6bbc2
LP		 429 "%sAccepted: %u\n"
430 "%sNConnections: %u\n"
431 "%sMaxConnections: %u\n",
432 prefix, s->n_accepted,
433 prefix, s->n_connections,
434 prefix, s->max_connections);
4f2d528d 435
4fd5948e
LP		 436 if (s->priority >= 0)
437 fprintf(f,
438 "%sPriority: %i\n",
439 prefix, s->priority);
440
441 if (s->receive_buffer > 0)
442 fprintf(f,
443 "%sReceiveBuffer: %zu\n",
444 prefix, s->receive_buffer);
445
446 if (s->send_buffer > 0)
447 fprintf(f,
448 "%sSendBuffer: %zu\n",
449 prefix, s->send_buffer);
450
451 if (s->ip_tos >= 0)
452 fprintf(f,
453 "%sIPTOS: %i\n",
454 prefix, s->ip_tos);
455
456 if (s->ip_ttl >= 0)
457 fprintf(f,
458 "%sIPTTL: %i\n",
459 prefix, s->ip_ttl);
460
461 if (s->pipe_size > 0)
462 fprintf(f,
463 "%sPipeSize: %zu\n",
464 prefix, s->pipe_size);
465
466 if (s->mark >= 0)
467 fprintf(f,
468 "%sMark: %i\n",
469 prefix, s->mark);
470
034c6ed7 471 LIST_FOREACH(port, p, s->ports) {
5cb5a6ff 472
542563ba
LP		 473 if (p->type == SOCKET_SOCKET) {
474 const char *t;
475 int r;
e364ad06 476 char *k = NULL;
542563ba
LP		 477
478 if ((r = socket_address_print(&p->address, &k)) < 0)
479 t = strerror(-r);
480 else
481 t = k;
482
7a22745a 483 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t);
542563ba 484 free(k);
b0a3f2bc
LP		 485 } else if (p->type == SOCKET_SPECIAL)
486 fprintf(f, "%sListenSpecial: %s\n", prefix, p->path);
487 else
542563ba
LP		 488 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
489 }
5cb5a6ff
LP		 490
491 exec_context_dump(&s->exec_context, f, prefix);
492
e537352b 493 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
c43d20a0
LP		 494 if (!s->exec_command[c])
495 continue;
5cb5a6ff 496
40d50879 497 fprintf(f, "%s-> %s:\n",
a16e1123 498 prefix, socket_exec_command_to_string(c));
c43d20a0
LP		 499
500 exec_command_dump_list(s->exec_command[c], f, prefix2);
5cb5a6ff 501 }
c43d20a0 502
82ba9f08 503 free(p2);
5cb5a6ff
LP		 504}
505
4f2d528d
LP		 506static int instance_from_socket(int fd, unsigned nr, char **instance) {
507 socklen_t l;
508 char *r;
509 union {
510 struct sockaddr sa;
511 struct sockaddr_un un;
512 struct sockaddr_in in;
513 struct sockaddr_in6 in6;
514 struct sockaddr_storage storage;
515 } local, remote;
516
517 assert(fd >= 0);
518 assert(instance);
519
520 l = sizeof(local);
521 if (getsockname(fd, &local.sa, &l) < 0)
522 return -errno;
523
524 l = sizeof(remote);
525 if (getpeername(fd, &remote.sa, &l) < 0)
526 return -errno;
527
528 switch (local.sa.sa_family) {
529
530 case AF_INET: {
531 uint32_t
532 a = ntohl(local.in.sin_addr.s_addr),
533 b = ntohl(remote.in.sin_addr.s_addr);
534
535 if (asprintf(&r,
b15bdda8 536 "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
4f2d528d
LP		 537 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
538 ntohs(local.in.sin_port),
539 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
540 ntohs(remote.in.sin_port)) < 0)
541 return -ENOMEM;
542
543 break;
544 }
545
546 case AF_INET6: {
2b061f5a
LP		 547 static const char ipv4_prefix[] = {
548 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
549 };
550
551 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
552 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
553 const uint8_t
554 *a = local.in6.sin6_addr.s6_addr+12,
555 *b = remote.in6.sin6_addr.s6_addr+12;
556
557 if (asprintf(&r,
b15bdda8 558 "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
2b061f5a
LP		 559 a[0], a[1], a[2], a[3],
560 ntohs(local.in6.sin6_port),
561 b[0], b[1], b[2], b[3],
562 ntohs(remote.in6.sin6_port)) < 0)
563 return -ENOMEM;
564 } else {
565 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
566
567 if (asprintf(&r,
b15bdda8 568 "%s:%u-%s:%u",
2b061f5a
LP		 569 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
570 ntohs(local.in6.sin6_port),
571 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
572 ntohs(remote.in6.sin6_port)) < 0)
573 return -ENOMEM;
574 }
4f2d528d
LP		 575
576 break;
577 }
578
579 case AF_UNIX: {
580 struct ucred ucred;
581
582 l = sizeof(ucred);
583 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
584 return -errno;
585
586 if (asprintf(&r,
bb00e604 587 "%u-%lu-%lu",
4f2d528d 588 nr,
bb00e604
LP		 589 (unsigned long) ucred.pid,
590 (unsigned long) ucred.uid) < 0)
4f2d528d
LP		 591 return -ENOMEM;
592
593 break;
594 }
595
596 default:
597 assert_not_reached("Unhandled socket type.");
598 }
599
600 *instance = r;
601 return 0;
602}
603
034c6ed7 604static void socket_close_fds(Socket *s) {
83c60c9f
LP		 605 SocketPort *p;
606
607 assert(s);
608
034c6ed7 609 LIST_FOREACH(port, p, s->ports) {
83c60c9f
LP		 610 if (p->fd < 0)
611 continue;
612
acbb0225 613 unit_unwatch_fd(UNIT(s), &p->fd_watch);
a16e1123
LP		 614 close_nointr_nofail(p->fd);
615
616 /* One little note: we should never delete any sockets
617 * in the file system here! After all some other
618 * process we spawned might still have a reference of
619 * this fd and wants to continue to use it. Therefore
620 * we delete sockets in the file system before we
621 * create a new one, not after we stopped using
622 * one! */
9152c765 623
83c60c9f
LP		 624 p->fd = -1;
625 }
626}
627
4fd5948e
LP		 628static void socket_apply_socket_options(Socket *s, int fd) {
629 assert(s);
630 assert(fd >= 0);
631
632 if (s->keep_alive) {
633 int b = s->keep_alive;
634 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
635 log_warning("SO_KEEPALIVE failed: %m");
636 }
637
638 if (s->priority >= 0)
639 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
640 log_warning("SO_PRIORITY failed: %m");
641
642 if (s->receive_buffer > 0) {
643 int value = (int) s->receive_buffer;
644 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
645 log_warning("SO_RCVBUF failed: %m");
646 }
647
648 if (s->send_buffer > 0) {
649 int value = (int) s->send_buffer;
650 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
651 log_warning("SO_SNDBUF failed: %m");
652 }
653
654 if (s->mark >= 0)
655 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
656 log_warning("SO_MARK failed: %m");
657
658 if (s->ip_tos >= 0)
659 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
660 log_warning("IP_TOS failed: %m");
661
46925ac5
LP		 662 if (s->ip_ttl >= 0) {
663 int r, x;
664
665 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
5bfcc1c6
FF		 666
667 if (socket_ipv6_is_supported())
668 x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
669 else {
670 x = -1;
671 errno = EAFNOSUPPORT;
672 }
46925ac5
LP		 673
674 if (r < 0 && x < 0)
675 log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
676 }
cebf8b20
TT		 677
678 if (s->tcp_congestion)
679 if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0)
680 log_warning("TCP_CONGESTION failed: %m");
4fd5948e
LP		 681}
682
b15bdda8 683static void socket_apply_fifo_options(Socket *s, int fd) {
4fd5948e
LP		 684 assert(s);
685 assert(fd >= 0);
686
687 if (s->pipe_size > 0)
688 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
689 log_warning("F_SETPIPE_SZ: %m");
690}
691
b15bdda8
LP		 692static int fifo_address_create(
693 const char *path,
694 mode_t directory_mode,
695 mode_t socket_mode,
b15bdda8
LP		 696 int *_fd) {
697
7a58bfa4 698 int fd = -1, r = 0;
b15bdda8
LP		 699 struct stat st;
700 mode_t old_mask;
701
702 assert(path);
703 assert(_fd);
704
705 mkdir_parents(path, directory_mode);
706
c4e2ceae 707 if ((r = label_fifofile_set(path)) < 0)
56cf987f 708 goto fail;
b15bdda8
LP		 709
710 /* Enforce the right access mode for the fifo */
711 old_mask = umask(~ socket_mode);
712
713 /* Include the original umask in our mask */
714 umask(~socket_mode | old_mask);
715
716 r = mkfifo(path, socket_mode);
717 umask(old_mask);
718
94bc2731 719 if (r < 0 && errno != EEXIST) {
b15bdda8
LP		 720 r = -errno;
721 goto fail;
722 }
723
724 if ((fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
725 r = -errno;
726 goto fail;
727 }
728
56cf987f 729 label_file_clear();
7a58bfa4 730
b15bdda8
LP		 731 if (fstat(fd, &st) < 0) {
732 r = -errno;
733 goto fail;
734 }
735
736 if (!S_ISFIFO(st.st_mode) ||
de0200fc 737 (st.st_mode & 0777) != (socket_mode & ~old_mask) ||
b15bdda8
LP		 738 st.st_uid != getuid() ||
739 st.st_gid != getgid()) {
740
741 r = -EEXIST;
742 goto fail;
743 }
744
745 *_fd = fd;
746 return 0;
747
748fail:
56cf987f
DW		 749 label_file_clear();
750
b15bdda8
LP		 751 if (fd >= 0)
752 close_nointr_nofail(fd);
753
754 return r;
755}
756
b0a3f2bc
LP		 757static int special_address_create(
758 const char *path,
759 int *_fd) {
760
761 int fd = -1, r = 0;
762 struct stat st;
763
764 assert(path);
765 assert(_fd);
766
767 if ((fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
768 r = -errno;
769 goto fail;
770 }
771
772 if (fstat(fd, &st) < 0) {
773 r = -errno;
774 goto fail;
775 }
776
777 /* Check whether this is a /proc, /sys or /dev file or char device */
778 if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) {
779 r = -EEXIST;
780 goto fail;
781 }
782
783 *_fd = fd;
784 return 0;
785
786fail:
787 if (fd >= 0)
788 close_nointr_nofail(fd);
789
790 return r;
791}
792
034c6ed7 793static int socket_open_fds(Socket *s) {
83c60c9f
LP		 794 SocketPort *p;
795 int r;
56cf987f 796 char *label = NULL;
049f8642 797 bool know_label = false;
83c60c9f
LP		 798
799 assert(s);
800
034c6ed7 801 LIST_FOREACH(port, p, s->ports) {
83c60c9f 802
034c6ed7
LP		 803 if (p->fd >= 0)
804 continue;
83c60c9f
LP		 805
806 if (p->type == SOCKET_SOCKET) {
807
049f8642
LP		 808 if (!know_label) {
809
810 if ((r = socket_instantiate_service(s)) < 0)
811 return r;
812
cae18e21 813 if (s->service && s->service->exec_command[SERVICE_EXEC_START])
a7444eda
LP		 814 if ((r = label_get_socket_label_from_exe(s->service->exec_command[SERVICE_EXEC_START]->path, &label)) < 0) {
815 if (r != -EPERM)
816 return r;
817 }
049f8642
LP		 818
819 know_label = true;
820 }
821
b5a0699f
LP		 822 if ((r = socket_address_listen(
823 &p->address,
824 s->backlog,
825 s->bind_ipv6_only,
826 s->bind_to_device,
4fd5948e 827 s->free_bind,
b5a0699f
LP		 828 s->directory_mode,
829 s->socket_mode,
56cf987f 830 label,
b5a0699f 831 &p->fd)) < 0)
83c60c9f
LP		 832 goto rollback;
833
4fd5948e
LP		 834 socket_apply_socket_options(s, p->fd);
835
b0a3f2bc
LP		 836 } else if (p->type == SOCKET_SPECIAL) {
837
838 if ((r = special_address_create(
839 p->path,
840 &p->fd)) < 0)
841 goto rollback;
842
b15bdda8 843 } else if (p->type == SOCKET_FIFO) {
83c60c9f 844
b15bdda8
LP		 845 if ((r = fifo_address_create(
846 p->path,
847 s->directory_mode,
848 s->socket_mode,
b15bdda8 849 &p->fd)) < 0)
83c60c9f 850 goto rollback;
83c60c9f 851
b15bdda8 852 socket_apply_fifo_options(s, p->fd);
83c60c9f 853
b15bdda8
LP		 854 } else
855 assert_not_reached("Unknown port type");
034c6ed7
LP		 856 }
857
56cf987f 858 label_free(label);
034c6ed7
LP		 859 return 0;
860
861rollback:
862 socket_close_fds(s);
56cf987f 863 label_free(label);
034c6ed7
LP		 864 return r;
865}
866
867static void socket_unwatch_fds(Socket *s) {
868 SocketPort *p;
9152c765 869
034c6ed7
LP		 870 assert(s);
871
872 LIST_FOREACH(port, p, s->ports) {
873 if (p->fd < 0)
874 continue;
875
acbb0225 876 unit_unwatch_fd(UNIT(s), &p->fd_watch);
83c60c9f 877 }
034c6ed7
LP		 878}
879
880static int socket_watch_fds(Socket *s) {
881 SocketPort *p;
882 int r;
883
884 assert(s);
83c60c9f 885
034c6ed7
LP		 886 LIST_FOREACH(port, p, s->ports) {
887 if (p->fd < 0)
888 continue;
889
cabab516 890 p->fd_watch.socket_accept =
4f2d528d 891 s->accept &&
dd5ad9d4 892 p->type == SOCKET_SOCKET &&
4f2d528d
LP		 893 socket_address_can_accept(&p->address);
894
f94ea366 895 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
034c6ed7
LP		 896 goto fail;
897 }
83c60c9f 898
542563ba 899 return 0;
83c60c9f 900
034c6ed7
LP		 901fail:
902 socket_unwatch_fds(s);
903 return r;
904}
905
906static void socket_set_state(Socket *s, SocketState state) {
907 SocketState old_state;
908 assert(s);
909
910 old_state = s->state;
911 s->state = state;
912
913 if (state != SOCKET_START_PRE &&
914 state != SOCKET_START_POST &&
915 state != SOCKET_STOP_PRE &&
916 state != SOCKET_STOP_PRE_SIGTERM &&
917 state != SOCKET_STOP_PRE_SIGKILL &&
918 state != SOCKET_STOP_POST &&
80876c20
LP		 919 state != SOCKET_FINAL_SIGTERM &&
920 state != SOCKET_FINAL_SIGKILL) {
acbb0225 921 unit_unwatch_timer(UNIT(s), &s->timer_watch);
5e94833f 922 socket_unwatch_control_pid(s);
034c6ed7 923 s->control_command = NULL;
a16e1123 924 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
e537352b 925 }
034c6ed7 926
a16e1123
LP		 927 if (state != SOCKET_LISTENING)
928 socket_unwatch_fds(s);
929
034c6ed7
LP		 930 if (state != SOCKET_START_POST &&
931 state != SOCKET_LISTENING &&
932 state != SOCKET_RUNNING &&
933 state != SOCKET_STOP_PRE &&
934 state != SOCKET_STOP_PRE_SIGTERM &&
935 state != SOCKET_STOP_PRE_SIGKILL)
936 socket_close_fds(s);
937
e537352b 938 if (state != old_state)
40d50879 939 log_debug("%s changed %s -> %s",
a16e1123
LP		 940 s->meta.id,
941 socket_state_to_string(old_state),
942 socket_state_to_string(state));
acbb0225 943
e2f3b44c 944 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
034c6ed7
LP		 945}
946
a16e1123
LP		 947static int socket_coldplug(Unit *u) {
948 Socket *s = SOCKET(u);
949 int r;
950
951 assert(s);
952 assert(s->state == SOCKET_DEAD);
953
954 if (s->deserialized_state != s->state) {
955
956 if (s->deserialized_state == SOCKET_START_PRE ||
957 s->deserialized_state == SOCKET_START_POST ||
958 s->deserialized_state == SOCKET_STOP_PRE ||
959 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
960 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
961 s->deserialized_state == SOCKET_STOP_POST ||
962 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
963 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
964
965 if (s->control_pid <= 0)
966 return -EBADMSG;
967
968 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
969 return r;
970
971 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
972 return r;
973 }
974
975 if (s->deserialized_state == SOCKET_START_POST ||
976 s->deserialized_state == SOCKET_LISTENING ||
977 s->deserialized_state == SOCKET_RUNNING ||
978 s->deserialized_state == SOCKET_STOP_PRE ||
979 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
980 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
981 if ((r = socket_open_fds(s)) < 0)
982 return r;
983
984 if (s->deserialized_state == SOCKET_LISTENING)
985 if ((r = socket_watch_fds(s)) < 0)
986 return r;
987
988 socket_set_state(s, s->deserialized_state);
989 }
990
991 return 0;
992}
993
e537352b 994static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
034c6ed7
LP		 995 pid_t pid;
996 int r;
9e2f7c11 997 char **argv;
034c6ed7
LP		 998
999 assert(s);
1000 assert(c);
1001 assert(_pid);
1002
e537352b
LP		 1003 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1004 goto fail;
034c6ed7 1005
9e2f7c11
LP		 1006 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1007 r = -ENOMEM;
1008 goto fail;
1009 }
1010
1011 r = exec_spawn(c,
1012 argv,
1013 &s->exec_context,
1014 NULL, 0,
1137a57c 1015 s->meta.manager->environment,
9e2f7c11
LP		 1016 true,
1017 true,
1e3ad081 1018 true,
4cd1fbcc
LP		 1019 s->meta.manager->confirm_spawn,
1020 s->meta.cgroup_bondings,
9e2f7c11
LP		 1021 &pid);
1022
1023 strv_free(argv);
1024 if (r < 0)
034c6ed7
LP		 1025 goto fail;
1026
87f0e418 1027 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
034c6ed7
LP		 1028 /* FIXME: we need to do something here */
1029 goto fail;
83c60c9f 1030
034c6ed7
LP		 1031 *_pid = pid;
1032
1033 return 0;
1034
1035fail:
e537352b 1036 unit_unwatch_timer(UNIT(s), &s->timer_watch);
83c60c9f
LP		 1037
1038 return r;
542563ba
LP		 1039}
1040
034c6ed7
LP		 1041static void socket_enter_dead(Socket *s, bool success) {
1042 assert(s);
1043
1044 if (!success)
1045 s->failure = true;
1046
fdf20a31 1047 socket_set_state(s, s->failure ? SOCKET_FAILED : SOCKET_DEAD);
034c6ed7
LP		 1048}
1049
80876c20
LP		 1050static void socket_enter_signal(Socket *s, SocketState state, bool success);
1051
034c6ed7
LP		 1052static void socket_enter_stop_post(Socket *s, bool success) {
1053 int r;
1054 assert(s);
1055
1056 if (!success)
1057 s->failure = true;
1058
5e94833f
LP		 1059 socket_unwatch_control_pid(s);
1060
a16e1123
LP		 1061 s->control_command_id = SOCKET_EXEC_STOP_POST;
1062
80876c20 1063 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
e537352b 1064 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1065 goto fail;
1066
80876c20
LP		 1067 socket_set_state(s, SOCKET_STOP_POST);
1068 } else
1069 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
034c6ed7
LP		 1070
1071 return;
1072
1073fail:
6cf6bbc2 1074 log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
80876c20 1075 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
034c6ed7
LP		 1076}
1077
1078static void socket_enter_signal(Socket *s, SocketState state, bool success) {
1079 int r;
ca949c9d
LP		 1080 Set *pid_set = NULL;
1081 bool wait_for_exit = false;
034c6ed7
LP		 1082
1083 assert(s);
1084
1085 if (!success)
1086 s->failure = true;
1087
2e22afe9
LP		 1088 if (s->exec_context.kill_mode != KILL_NONE) {
1089 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
034c6ed7 1090
ca949c9d 1091 if (s->control_pid > 0) {
cd25cce9 1092 if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
50159e6a 1093
ca949c9d
LP		 1094 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1095 else
1096 wait_for_exit = true;
034c6ed7 1097 }
50159e6a 1098
ca949c9d
LP		 1099 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1100
1101 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1102 r = -ENOMEM;
50159e6a
LP		 1103 goto fail;
1104 }
ca949c9d
LP		 1105
1106 /* Exclude the control pid from being killed via the cgroup */
1107 if (s->control_pid > 0)
1108 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1109 goto fail;
1110
430c18ed 1111 if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
ca949c9d
LP		 1112 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1113 log_warning("Failed to kill control group: %s", strerror(-r));
1114 } else if (r > 0)
1115 wait_for_exit = true;
1116
1117 set_free(pid_set);
da19d5c1 1118 pid_set = NULL;
ca949c9d 1119 }
d6ea93e3 1120 }
034c6ed7 1121
ca949c9d 1122 if (wait_for_exit) {
80876c20
LP		 1123 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1124 goto fail;
d6ea93e3 1125
80876c20
LP		 1126 socket_set_state(s, state);
1127 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1128 socket_enter_stop_post(s, true);
1129 else
034c6ed7
LP		 1130 socket_enter_dead(s, true);
1131
1132 return;
1133
1134fail:
9e2f7c11 1135 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1136
1137 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1138 socket_enter_stop_post(s, false);
1139 else
1140 socket_enter_dead(s, false);
ca949c9d
LP		 1141
1142 if (pid_set)
1143 set_free(pid_set);
034c6ed7
LP		 1144}
1145
1146static void socket_enter_stop_pre(Socket *s, bool success) {
1147 int r;
1148 assert(s);
1149
1150 if (!success)
1151 s->failure = true;
1152
5e94833f
LP		 1153 socket_unwatch_control_pid(s);
1154
a16e1123
LP		 1155 s->control_command_id = SOCKET_EXEC_STOP_PRE;
1156
80876c20 1157 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
e537352b 1158 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1159 goto fail;
1160
80876c20
LP		 1161 socket_set_state(s, SOCKET_STOP_PRE);
1162 } else
034c6ed7
LP		 1163 socket_enter_stop_post(s, true);
1164
1165 return;
1166
1167fail:
6cf6bbc2 1168 log_warning("%s failed to run 'stop-pre' task: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1169 socket_enter_stop_post(s, false);
1170}
1171
e9af15c3
LP		 1172static void socket_enter_listening(Socket *s) {
1173 int r;
1174 assert(s);
1175
1176 if ((r = socket_watch_fds(s)) < 0) {
9e2f7c11 1177 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
e9af15c3
LP		 1178 goto fail;
1179 }
1180
1181 socket_set_state(s, SOCKET_LISTENING);
1182 return;
1183
1184fail:
1185 socket_enter_stop_pre(s, false);
1186}
1187
034c6ed7
LP		 1188static void socket_enter_start_post(Socket *s) {
1189 int r;
1190 assert(s);
1191
e9af15c3 1192 if ((r = socket_open_fds(s)) < 0) {
9e2f7c11 1193 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1194 goto fail;
1195 }
1196
5e94833f
LP		 1197 socket_unwatch_control_pid(s);
1198
a16e1123
LP		 1199 s->control_command_id = SOCKET_EXEC_START_POST;
1200
80876c20 1201 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
e537352b 1202 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
6cf6bbc2 1203 log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1204 goto fail;
1205 }
1206
80876c20
LP		 1207 socket_set_state(s, SOCKET_START_POST);
1208 } else
e9af15c3 1209 socket_enter_listening(s);
034c6ed7
LP		 1210
1211 return;
1212
1213fail:
1214 socket_enter_stop_pre(s, false);
1215}
1216
1217static void socket_enter_start_pre(Socket *s) {
1218 int r;
1219 assert(s);
1220
5e94833f
LP		 1221 socket_unwatch_control_pid(s);
1222
a16e1123
LP		 1223 s->control_command_id = SOCKET_EXEC_START_PRE;
1224
80876c20 1225 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
e537352b 1226 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1227 goto fail;
1228
80876c20
LP		 1229 socket_set_state(s, SOCKET_START_PRE);
1230 } else
034c6ed7
LP		 1231 socket_enter_start_post(s);
1232
1233 return;
1234
1235fail:
6cf6bbc2 1236 log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1237 socket_enter_dead(s, false);
1238}
1239
4f2d528d 1240static void socket_enter_running(Socket *s, int cfd) {
034c6ed7 1241 int r;
398ef8ba 1242 DBusError error;
034c6ed7
LP		 1243
1244 assert(s);
398ef8ba 1245 dbus_error_init(&error);
034c6ed7 1246
ba3e67a7
LP		 1247 /* We don't take connections anymore if we are supposed to
1248 * shut down anyway */
18ffdfda 1249 if (unit_pending_inactive(UNIT(s))) {
5d909e3e
LP		 1250 log_debug("Suppressing connection request on %s since unit stop is scheduled.", s->meta.id);
1251
7c610628
LP		 1252 if (cfd >= 0)
1253 close_nointr_nofail(cfd);
1254 else {
1255 /* Flush all sockets by closing and reopening them */
1256 socket_close_fds(s);
1257
1258 if ((r = socket_watch_fds(s)) < 0) {
1259 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
1260 socket_enter_stop_pre(s, false);
1261 }
1262 }
1263
ba3e67a7
LP		 1264 return;
1265 }
1266
4f2d528d 1267 if (cfd < 0) {
f976f3f6
LP		 1268 bool pending = false;
1269 Meta *i;
1270
1271 /* If there's already a start pending don't bother to
1272 * do anything */
1273 LIST_FOREACH(units_per_type, i, s->meta.manager->units_per_type[UNIT_SERVICE]) {
1274 Service *service = (Service *) i;
1275
1276 if (!set_get(service->configured_sockets, s))
1277 continue;
1278
1279 if (!unit_pending_active(UNIT(service)))
1280 continue;
1281
1282 pending = true;
1283 break;
1284 }
1285
1286 if (!pending)
1287 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, &error, NULL)) < 0)
1288 goto fail;
4f2d528d
LP		 1289
1290 socket_set_state(s, SOCKET_RUNNING);
1291 } else {
b4f10a5e 1292 char *prefix, *instance = NULL, *name;
b15bdda8 1293 Service *service;
4f2d528d 1294
6cf6bbc2
LP		 1295 if (s->n_connections >= s->max_connections) {
1296 log_warning("Too many incoming connections (%u)", s->n_connections);
1297 close_nointr_nofail(cfd);
1298 return;
1299 }
1300
b15bdda8
LP		 1301 if ((r = socket_instantiate_service(s)) < 0)
1302 goto fail;
1303
1304 if ((r = instance_from_socket(cfd, s->n_accepted, &instance)) < 0)
4f2d528d
LP		 1305 goto fail;
1306
4cd1fbcc 1307 if (!(prefix = unit_name_to_prefix(s->meta.id))) {
4f2d528d
LP		 1308 free(instance);
1309 r = -ENOMEM;
1310 goto fail;
1311 }
1312
1313 name = unit_name_build(prefix, instance, ".service");
1314 free(prefix);
1315 free(instance);
1316
b6dbbe1c 1317 if (!name) {
4f2d528d 1318 r = -ENOMEM;
b6dbbe1c
LP		 1319 goto fail;
1320 }
4f2d528d 1321
b15bdda8
LP		 1322 if ((r = unit_add_name(UNIT(s->service), name)) < 0) {
1323 free(name);
4f2d528d 1324 goto fail;
b15bdda8
LP		 1325 }
1326
1327 service = s->service;
1328 s->service = NULL;
1329 s->n_accepted ++;
4f2d528d 1330
6c073082
LP		 1331 service->meta.no_gc = false;
1332
b15bdda8
LP		 1333 unit_choose_id(UNIT(service), name);
1334 free(name);
1335
1336 if ((r = service_set_socket_fd(service, cfd, s)) < 0)
4f2d528d
LP		 1337 goto fail;
1338
1339 cfd = -1;
6cf6bbc2
LP		 1340 s->n_connections ++;
1341
b15bdda8 1342 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(service), JOB_REPLACE, true, &error, NULL)) < 0)
4f2d528d 1343 goto fail;
c4e2ceae
LP		 1344
1345 /* Notify clients about changed counters */
1346 unit_add_to_dbus_queue(UNIT(s));
4f2d528d 1347 }
034c6ed7 1348
034c6ed7
LP		 1349 return;
1350
1351fail:
398ef8ba 1352 log_warning("%s failed to queue socket startup job: %s", s->meta.id, bus_error(&error, r));
80876c20 1353 socket_enter_stop_pre(s, false);
4f2d528d
LP		 1354
1355 if (cfd >= 0)
1356 close_nointr_nofail(cfd);
398ef8ba
LP		 1357
1358 dbus_error_free(&error);
034c6ed7
LP		 1359}
1360
1361static void socket_run_next(Socket *s, bool success) {
1362 int r;
1363
1364 assert(s);
1365 assert(s->control_command);
1366 assert(s->control_command->command_next);
1367
1368 if (!success)
1369 s->failure = true;
1370
5e94833f
LP		 1371 socket_unwatch_control_pid(s);
1372
034c6ed7
LP		 1373 s->control_command = s->control_command->command_next;
1374
e537352b 1375 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1376 goto fail;
1377
1378 return;
1379
1380fail:
6cf6bbc2 1381 log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
80876c20
LP		 1382
1383 if (s->state == SOCKET_START_POST)
1384 socket_enter_stop_pre(s, false);
034c6ed7
LP		 1385 else if (s->state == SOCKET_STOP_POST)
1386 socket_enter_dead(s, false);
1387 else
80876c20 1388 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
034c6ed7
LP		 1389}
1390
87f0e418
LP		 1391static int socket_start(Unit *u) {
1392 Socket *s = SOCKET(u);
83c60c9f
LP		 1393
1394 assert(s);
1395
034c6ed7
LP		 1396 /* We cannot fulfill this request right now, try again later
1397 * please! */
1398 if (s->state == SOCKET_STOP_PRE ||
1399 s->state == SOCKET_STOP_PRE_SIGKILL ||
1400 s->state == SOCKET_STOP_PRE_SIGTERM ||
1401 s->state == SOCKET_STOP_POST ||
80876c20
LP		 1402 s->state == SOCKET_FINAL_SIGTERM ||
1403 s->state == SOCKET_FINAL_SIGKILL)
034c6ed7
LP		 1404 return -EAGAIN;
1405
83c60c9f
LP		 1406 if (s->state == SOCKET_START_PRE ||
1407 s->state == SOCKET_START_POST)
034c6ed7 1408 return 0;
83c60c9f 1409
034c6ed7 1410 /* Cannot run this without the service being around */
4f2d528d 1411 if (s->service) {
4ac9236f
LP		 1412 if (s->service->meta.load_state != UNIT_LOADED) {
1413 log_error("Socket service %s not loaded, refusing.", s->service->meta.id);
4f2d528d 1414 return -ENOENT;
4ac9236f 1415 }
4f2d528d 1416
35b8ca3a 1417 /* If the service is already active we cannot start the
4f2d528d
LP		 1418 * socket */
1419 if (s->service->state != SERVICE_DEAD &&
fdf20a31 1420 s->service->state != SERVICE_FAILED &&
4ac9236f
LP		 1421 s->service->state != SERVICE_AUTO_RESTART) {
1422 log_error("Socket service %s already active, refusing.", s->service->meta.id);
4f2d528d 1423 return -EBUSY;
4ac9236f 1424 }
7b4bf06b
LP		 1425
1426#ifdef HAVE_SYSV_COMPAT
1427 if (s->service->sysv_path) {
1428 log_error("Using SysV services for socket activation is not supported. Refusing.");
1429 return -ENOENT;
1430 }
1431#endif
4f2d528d 1432 }
e537352b 1433
fdf20a31 1434 assert(s->state == SOCKET_DEAD || s->state == SOCKET_FAILED);
83c60c9f 1435
034c6ed7
LP		 1436 s->failure = false;
1437 socket_enter_start_pre(s);
1438 return 0;
1439}
83c60c9f 1440
87f0e418
LP		 1441static int socket_stop(Unit *u) {
1442 Socket *s = SOCKET(u);
034c6ed7
LP		 1443
1444 assert(s);
1445
e537352b
LP		 1446 /* Already on it */
1447 if (s->state == SOCKET_STOP_PRE ||
1448 s->state == SOCKET_STOP_PRE_SIGTERM ||
1449 s->state == SOCKET_STOP_PRE_SIGKILL ||
1450 s->state == SOCKET_STOP_POST ||
80876c20 1451 s->state == SOCKET_FINAL_SIGTERM ||
3f6c78dc 1452 s->state == SOCKET_FINAL_SIGKILL)
e537352b
LP		 1453 return 0;
1454
3f6c78dc
LP		 1455 /* If there's already something running we go directly into
1456 * kill mode. */
1457 if (s->state == SOCKET_START_PRE ||
1458 s->state == SOCKET_START_POST) {
1459 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, true);
1460 return -EAGAIN;
1461 }
1462
034c6ed7 1463 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
83c60c9f 1464
034c6ed7 1465 socket_enter_stop_pre(s, true);
542563ba
LP		 1466 return 0;
1467}
1468
a16e1123
LP		 1469static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1470 Socket *s = SOCKET(u);
1471 SocketPort *p;
1472 int r;
1473
1474 assert(u);
1475 assert(f);
1476 assert(fds);
1477
1478 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1479 unit_serialize_item(u, f, "failure", yes_no(s->failure));
1480 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1481
1482 if (s->control_pid > 0)
5925dd3c 1483 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
a16e1123
LP		 1484
1485 if (s->control_command_id >= 0)
1486 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1487
1488 LIST_FOREACH(port, p, s->ports) {
1489 int copy;
1490
1491 if (p->fd < 0)
1492 continue;
1493
1494 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1495 return copy;
1496
1497 if (p->type == SOCKET_SOCKET) {
1498 char *t;
1499
1500 if ((r = socket_address_print(&p->address, &t)) < 0)
1501 return r;
1502
7a22745a
LP		 1503 if (socket_address_family(&p->address) == AF_NETLINK)
1504 unit_serialize_item_format(u, f, "netlink", "%i %s", copy, t);
1505 else
1506 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
a16e1123 1507 free(t);
b0a3f2bc
LP		 1508 } else if (p->type == SOCKET_SPECIAL)
1509 unit_serialize_item_format(u, f, "special", "%i %s", copy, p->path);
1510 else {
a16e1123
LP		 1511 assert(p->type == SOCKET_FIFO);
1512 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1513 }
1514 }
1515
1516 return 0;
1517}
1518
1519static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1520 Socket *s = SOCKET(u);
a16e1123
LP		 1521
1522 assert(u);
1523 assert(key);
1524 assert(value);
1525 assert(fds);
1526
1527 if (streq(key, "state")) {
1528 SocketState state;
1529
1530 if ((state = socket_state_from_string(value)) < 0)
1531 log_debug("Failed to parse state value %s", value);
1532 else
1533 s->deserialized_state = state;
1534 } else if (streq(key, "failure")) {
1535 int b;
1536
1537 if ((b = parse_boolean(value)) < 0)
1538 log_debug("Failed to parse failure value %s", value);
1539 else
1540 s->failure = b || s->failure;
1541
1542 } else if (streq(key, "n-accepted")) {
1543 unsigned k;
1544
e364ad06 1545 if (safe_atou(value, &k) < 0)
a16e1123
LP		 1546 log_debug("Failed to parse n-accepted value %s", value);
1547 else
1548 s->n_accepted += k;
1549 } else if (streq(key, "control-pid")) {
5925dd3c 1550 pid_t pid;
a16e1123 1551
e364ad06 1552 if (parse_pid(value, &pid) < 0)
a16e1123
LP		 1553 log_debug("Failed to parse control-pid value %s", value);
1554 else
5925dd3c 1555 s->control_pid = pid;
a16e1123
LP		 1556 } else if (streq(key, "control-command")) {
1557 SocketExecCommand id;
1558
1559 if ((id = socket_exec_command_from_string(value)) < 0)
1560 log_debug("Failed to parse exec-command value %s", value);
1561 else {
1562 s->control_command_id = id;
1563 s->control_command = s->exec_command[id];
1564 }
1565 } else if (streq(key, "fifo")) {
1566 int fd, skip = 0;
1567 SocketPort *p;
1568
1569 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1570 log_debug("Failed to parse fifo value %s", value);
1571 else {
1572
1573 LIST_FOREACH(port, p, s->ports)
b0a3f2bc
LP		 1574 if (p->type == SOCKET_FIFO &&
1575 streq_ptr(p->path, value+skip))
1576 break;
1577
1578 if (p) {
1579 if (p->fd >= 0)
1580 close_nointr_nofail(p->fd);
1581 p->fd = fdset_remove(fds, fd);
1582 }
1583 }
1584
1585 } else if (streq(key, "special")) {
1586 int fd, skip = 0;
1587 SocketPort *p;
1588
1589 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1590 log_debug("Failed to parse special value %s", value);
1591 else {
1592
1593 LIST_FOREACH(port, p, s->ports)
1594 if (p->type == SOCKET_SPECIAL &&
1595 streq_ptr(p->path, value+skip))
a16e1123
LP		 1596 break;
1597
1598 if (p) {
1599 if (p->fd >= 0)
1600 close_nointr_nofail(p->fd);
1601 p->fd = fdset_remove(fds, fd);
1602 }
1603 }
1604
1605 } else if (streq(key, "socket")) {
27ca8d7a 1606 int fd, type, skip = 0;
a16e1123
LP		 1607 SocketPort *p;
1608
27ca8d7a 1609 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
a16e1123
LP		 1610 log_debug("Failed to parse socket value %s", value);
1611 else {
1612
1613 LIST_FOREACH(port, p, s->ports)
27ca8d7a 1614 if (socket_address_is(&p->address, value+skip, type))
a16e1123
LP		 1615 break;
1616
1617 if (p) {
1618 if (p->fd >= 0)
1619 close_nointr_nofail(p->fd);
1620 p->fd = fdset_remove(fds, fd);
1621 }
1622 }
1623
7a22745a
LP		 1624 } else if (streq(key, "netlink")) {
1625 int fd, skip = 0;
1626 SocketPort *p;
1627
1628 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1629 log_debug("Failed to parse socket value %s", value);
1630 else {
1631
1632 LIST_FOREACH(port, p, s->ports)
1633 if (socket_address_is_netlink(&p->address, value+skip))
1634 break;
1635
1636 if (p) {
1637 if (p->fd >= 0)
1638 close_nointr_nofail(p->fd);
1639 p->fd = fdset_remove(fds, fd);
1640 }
1641 }
1642
a16e1123
LP		 1643 } else
1644 log_debug("Unknown serialization key '%s'", key);
1645
1646 return 0;
1647}
1648
87f0e418
LP		 1649static UnitActiveState socket_active_state(Unit *u) {
1650 assert(u);
5cb5a6ff 1651
acbb0225 1652 return state_translation_table[SOCKET(u)->state];
5cb5a6ff
LP		 1653}
1654
10a94420
LP		 1655static const char *socket_sub_state_to_string(Unit *u) {
1656 assert(u);
1657
a16e1123 1658 return socket_state_to_string(SOCKET(u)->state);
10a94420
LP		 1659}
1660
6cf6bbc2
LP		 1661static bool socket_check_gc(Unit *u) {
1662 Socket *s = SOCKET(u);
1663
1664 assert(u);
1665
1666 return s->n_connections > 0;
1667}
1668
acbb0225 1669static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
87f0e418 1670 Socket *s = SOCKET(u);
4f2d528d 1671 int cfd = -1;
9152c765 1672
034c6ed7 1673 assert(s);
8d567588 1674 assert(fd >= 0);
9152c765 1675
871d7de4
LP		 1676 if (s->state != SOCKET_LISTENING)
1677 return;
1678
9e2f7c11 1679 log_debug("Incoming traffic on %s", u->meta.id);
9152c765 1680
4f2d528d 1681 if (events != EPOLLIN) {
ec8b1194 1682 log_error("%s: Got invalid poll event (0x%x) on socket.", u->meta.id, events);
8d567588 1683 goto fail;
4f2d528d
LP		 1684 }
1685
cabab516 1686 if (w->socket_accept) {
4f2d528d
LP		 1687 for (;;) {
1688
1689 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1690
1691 if (errno == EINTR)
1692 continue;
1693
1694 log_error("Failed to accept socket: %m");
8d567588 1695 goto fail;
4f2d528d
LP		 1696 }
1697
1698 break;
1699 }
4fd5948e
LP		 1700
1701 socket_apply_socket_options(s, cfd);
4f2d528d 1702 }
9152c765 1703
4f2d528d 1704 socket_enter_running(s, cfd);
8d567588
LP		 1705 return;
1706
1707fail:
1708 socket_enter_stop_pre(s, false);
9152c765
LP		 1709}
1710
87f0e418
LP		 1711static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1712 Socket *s = SOCKET(u);
034c6ed7 1713 bool success;
5cb5a6ff
LP		 1714
1715 assert(s);
034c6ed7 1716 assert(pid >= 0);
5cb5a6ff 1717
8c47c732
LP		 1718 if (pid != s->control_pid)
1719 return;
542563ba 1720
034c6ed7
LP		 1721 s->control_pid = 0;
1722
8c47c732 1723 success = is_clean_exit(code, status);
8c47c732 1724
b708e7ce 1725 if (s->control_command) {
169c1bda 1726 exec_status_exit(&s->control_command->exec_status, pid, code, status, s->exec_context.utmp_id);
a16e1123 1727
b708e7ce
LP		 1728 if (s->control_command->ignore)
1729 success = true;
1730 }
1731
92abbefb
LP		 1732 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1733 "%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
b708e7ce 1734 s->failure = s->failure || !success;
034c6ed7 1735
a16e1123
LP		 1736 if (s->control_command && s->control_command->command_next && success) {
1737 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
034c6ed7 1738 socket_run_next(s, success);
acbb0225 1739 } else {
a16e1123
LP		 1740 s->control_command = NULL;
1741 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1742
034c6ed7
LP		 1743 /* No further commands for this step, so let's figure
1744 * out what to do next */
5cb5a6ff 1745
a16e1123 1746 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
acbb0225 1747
034c6ed7
LP		 1748 switch (s->state) {
1749
1750 case SOCKET_START_PRE:
1751 if (success)
acbb0225 1752 socket_enter_start_post(s);
034c6ed7 1753 else
80876c20 1754 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
034c6ed7
LP		 1755 break;
1756
1757 case SOCKET_START_POST:
1758 if (success)
e9af15c3 1759 socket_enter_listening(s);
034c6ed7
LP		 1760 else
1761 socket_enter_stop_pre(s, false);
1762 break;
1763
1764 case SOCKET_STOP_PRE:
1765 case SOCKET_STOP_PRE_SIGTERM:
1766 case SOCKET_STOP_PRE_SIGKILL:
1767 socket_enter_stop_post(s, success);
1768 break;
1769
1770 case SOCKET_STOP_POST:
80876c20
LP		 1771 case SOCKET_FINAL_SIGTERM:
1772 case SOCKET_FINAL_SIGKILL:
034c6ed7
LP		 1773 socket_enter_dead(s, success);
1774 break;
1775
1776 default:
1777 assert_not_reached("Uh, control process died at wrong time.");
1778 }
1779 }
c4e2ceae
LP		 1780
1781 /* Notify clients about changed exit status */
1782 unit_add_to_dbus_queue(u);
034c6ed7 1783}
5cb5a6ff 1784
acbb0225 1785static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
87f0e418 1786 Socket *s = SOCKET(u);
5cb5a6ff 1787
034c6ed7
LP		 1788 assert(s);
1789 assert(elapsed == 1);
acbb0225 1790 assert(w == &s->timer_watch);
034c6ed7
LP		 1791
1792 switch (s->state) {
1793
1794 case SOCKET_START_PRE:
9e2f7c11 1795 log_warning("%s starting timed out. Terminating.", u->meta.id);
80876c20 1796 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
da19d5c1 1797 break;
80876c20 1798
034c6ed7 1799 case SOCKET_START_POST:
9e2f7c11 1800 log_warning("%s starting timed out. Stopping.", u->meta.id);
034c6ed7
LP		 1801 socket_enter_stop_pre(s, false);
1802 break;
1803
1804 case SOCKET_STOP_PRE:
9e2f7c11 1805 log_warning("%s stopping timed out. Terminating.", u->meta.id);
034c6ed7
LP		 1806 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1807 break;
1808
1809 case SOCKET_STOP_PRE_SIGTERM:
ba035df2
LP		 1810 if (s->exec_context.send_sigkill) {
1811 log_warning("%s stopping timed out. Killing.", u->meta.id);
1812 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1813 } else {
1814 log_warning("%s stopping timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1815 socket_enter_stop_post(s, false);
1816 }
034c6ed7
LP		 1817 break;
1818
1819 case SOCKET_STOP_PRE_SIGKILL:
9e2f7c11 1820 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
034c6ed7
LP		 1821 socket_enter_stop_post(s, false);
1822 break;
1823
1824 case SOCKET_STOP_POST:
9e2f7c11 1825 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
80876c20 1826 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
034c6ed7
LP		 1827 break;
1828
80876c20 1829 case SOCKET_FINAL_SIGTERM:
ba035df2
LP		 1830 if (s->exec_context.send_sigkill) {
1831 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1832 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1833 } else {
1834 log_warning("%s stopping timed out (2). Skipping SIGKILL. Ignoring.", u->meta.id);
1835 socket_enter_dead(s, false);
1836 }
034c6ed7
LP		 1837 break;
1838
80876c20 1839 case SOCKET_FINAL_SIGKILL:
fdf20a31 1840 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
034c6ed7
LP		 1841 socket_enter_dead(s, false);
1842 break;
1843
1844 default:
1845 assert_not_reached("Timeout at wrong time.");
1846 }
5cb5a6ff
LP		 1847}
1848
44d8db9e
LP		 1849int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1850 int *rfds;
1851 unsigned rn_fds, k;
1852 SocketPort *p;
1853
1854 assert(s);
1855 assert(fds);
1856 assert(n_fds);
1857
1858 /* Called from the service code for requesting our fds */
1859
1860 rn_fds = 0;
1861 LIST_FOREACH(port, p, s->ports)
1862 if (p->fd >= 0)
1863 rn_fds++;
1864
e364ad06 1865 if (!(rfds = new(int, rn_fds)))
44d8db9e
LP		 1866 return -ENOMEM;
1867
1868 k = 0;
1869 LIST_FOREACH(port, p, s->ports)
1870 if (p->fd >= 0)
1871 rfds[k++] = p->fd;
1872
1873 assert(k == rn_fds);
1874
1875 *fds = rfds;
1876 *n_fds = rn_fds;
1877
1878 return 0;
1879}
1880
ceee3d82
LP		 1881void socket_notify_service_dead(Socket *s) {
1882 assert(s);
1883
6cf6bbc2
LP		 1884 /* The service is dead. Dang!
1885 *
1886 * This is strictly for one-instance-for-all-connections
1887 * services. */
ceee3d82
LP		 1888
1889 if (s->state == SOCKET_RUNNING) {
9e2f7c11 1890 log_debug("%s got notified about service death.", s->meta.id);
ceee3d82
LP		 1891 socket_enter_listening(s);
1892 }
1893}
1894
6cf6bbc2
LP		 1895void socket_connection_unref(Socket *s) {
1896 assert(s);
1897
1898 /* The service is dead. Yay!
1899 *
35b8ca3a 1900 * This is strictly for one-instance-per-connection
6cf6bbc2
LP		 1901 * services. */
1902
1903 assert(s->n_connections > 0);
1904 s->n_connections--;
1905
1906 log_debug("%s: One connection closed, %u left.", s->meta.id, s->n_connections);
1907}
1908
fdf20a31 1909static void socket_reset_failed(Unit *u) {
5632e374
LP		 1910 Socket *s = SOCKET(u);
1911
1912 assert(s);
1913
fdf20a31 1914 if (s->state == SOCKET_FAILED)
5632e374
LP		 1915 socket_set_state(s, SOCKET_DEAD);
1916
1917 s->failure = false;
1918}
1919
8a0867d6
LP		 1920static int socket_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1921 Socket *s = SOCKET(u);
1922 int r = 0;
1923 Set *pid_set = NULL;
1924
1925 assert(s);
1926
1927 if (who == KILL_MAIN) {
1928 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Socket units have no main processes");
1929 return -EINVAL;
1930 }
1931
1932 if (s->control_pid <= 0 && who == KILL_CONTROL) {
1933 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1934 return -ENOENT;
1935 }
1936
1937 if (s->control_pid > 0)
cd25cce9 1938 if (kill(s->control_pid, signo) < 0)
8a0867d6
LP		 1939 r = -errno;
1940
1941 if (mode == KILL_CONTROL_GROUP) {
1942 int q;
1943
1944 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1945 return -ENOMEM;
1946
1947 /* Exclude the control pid from being killed via the cgroup */
1948 if (s->control_pid > 0)
1949 if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
1950 r = q;
1951 goto finish;
1952 }
1953
430c18ed 1954 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, false, pid_set)) < 0)
8a0867d6
LP		 1955 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1956 r = q;
1957 }
1958
1959finish:
1960 if (pid_set)
1961 set_free(pid_set);
1962
1963 return r;
1964}
1965
a16e1123
LP		 1966static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1967 [SOCKET_DEAD] = "dead",
1968 [SOCKET_START_PRE] = "start-pre",
1969 [SOCKET_START_POST] = "start-post",
1970 [SOCKET_LISTENING] = "listening",
1971 [SOCKET_RUNNING] = "running",
1972 [SOCKET_STOP_PRE] = "stop-pre",
1973 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1974 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1975 [SOCKET_STOP_POST] = "stop-post",
1976 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1977 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
fdf20a31 1978 [SOCKET_FAILED] = "failed"
a16e1123
LP		 1979};
1980
1981DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1982
1983static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1984 [SOCKET_EXEC_START_PRE] = "StartPre",
1985 [SOCKET_EXEC_START_POST] = "StartPost",
1986 [SOCKET_EXEC_STOP_PRE] = "StopPre",
1987 [SOCKET_EXEC_STOP_POST] = "StopPost"
1988};
1989
1990DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1991
87f0e418 1992const UnitVTable socket_vtable = {
5cb5a6ff
LP		 1993 .suffix = ".socket",
1994
034c6ed7
LP		 1995 .init = socket_init,
1996 .done = socket_done,
a16e1123
LP		 1997 .load = socket_load,
1998
8a0867d6
LP		 1999 .kill = socket_kill,
2000
a16e1123 2001 .coldplug = socket_coldplug,
034c6ed7 2002
5cb5a6ff
LP		 2003 .dump = socket_dump,
2004
542563ba
LP		 2005 .start = socket_start,
2006 .stop = socket_stop,
5cb5a6ff 2007
a16e1123
LP		 2008 .serialize = socket_serialize,
2009 .deserialize_item = socket_deserialize_item,
2010
5cb5a6ff 2011 .active_state = socket_active_state,
10a94420 2012 .sub_state_to_string = socket_sub_state_to_string,
5cb5a6ff 2013
6cf6bbc2
LP		 2014 .check_gc = socket_check_gc,
2015
9152c765 2016 .fd_event = socket_fd_event,
034c6ed7 2017 .sigchld_event = socket_sigchld_event,
4139c1b2
LP		 2018 .timer_event = socket_timer_event,
2019
fdf20a31 2020 .reset_failed = socket_reset_failed,
5632e374 2021
c4e2ceae
LP		 2022 .bus_interface = "org.freedesktop.systemd1.Socket",
2023 .bus_message_handler = bus_socket_message_handler,
2024 .bus_invalidating_properties = bus_socket_invalidating_properties
5cb5a6ff 2025};
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