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service/systemctl: don't consider LSB exit codes 5 and 6 as failure, and decode exit...
[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"
83c60c9f 44
acbb0225 45static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
87f0e418
LP		 46 [SOCKET_DEAD] = UNIT_INACTIVE,
47 [SOCKET_START_PRE] = UNIT_ACTIVATING,
48 [SOCKET_START_POST] = UNIT_ACTIVATING,
49 [SOCKET_LISTENING] = UNIT_ACTIVE,
50 [SOCKET_RUNNING] = UNIT_ACTIVE,
51 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
52 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
53 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
54 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
80876c20
LP		 55 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
56 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
032ff4af 57 [SOCKET_MAINTENANCE] = UNIT_MAINTENANCE
83c60c9f 58};
5cb5a6ff 59
a16e1123
LP		 60static void socket_init(Unit *u) {
61 Socket *s = SOCKET(u);
62
63 assert(u);
64 assert(u->meta.load_state == UNIT_STUB);
65
a16e1123
LP		 66 s->backlog = SOMAXCONN;
67 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
68 s->directory_mode = 0755;
69 s->socket_mode = 0666;
70
6cf6bbc2
LP		 71 s->max_connections = 64;
72
4fd5948e 73 s->priority = -1;
4fd5948e
LP		 74 s->ip_tos = -1;
75 s->ip_ttl = -1;
4fd5948e 76 s->mark = -1;
4fd5948e 77
a16e1123
LP		 78 exec_context_init(&s->exec_context);
79
80 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
81}
acbb0225 82
5e94833f
LP		 83static void socket_unwatch_control_pid(Socket *s) {
84 assert(s);
85
86 if (s->control_pid <= 0)
87 return;
88
89 unit_unwatch_pid(UNIT(s), s->control_pid);
90 s->control_pid = 0;
91}
92
87f0e418
LP		 93static void socket_done(Unit *u) {
94 Socket *s = SOCKET(u);
034c6ed7 95 SocketPort *p;
6cf6bbc2 96 Meta *i;
034c6ed7
LP		 97
98 assert(s);
99
100 while ((p = s->ports)) {
101 LIST_REMOVE(SocketPort, port, s->ports, p);
102
a16e1123
LP		 103 if (p->fd >= 0) {
104 unit_unwatch_fd(UNIT(s), &p->fd_watch);
105 close_nointr_nofail(p->fd);
106 }
107
034c6ed7
LP		 108 free(p->path);
109 free(p);
110 }
111
112 exec_context_done(&s->exec_context);
e537352b 113 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
034c6ed7
LP		 114 s->control_command = NULL;
115
5e94833f 116 socket_unwatch_control_pid(s);
034c6ed7
LP		 117
118 s->service = NULL;
119
cebf8b20
TT		 120 free(s->tcp_congestion);
121 s->tcp_congestion = NULL;
122
acbb0225 123 free(s->bind_to_device);
e537352b 124 s->bind_to_device = NULL;
acbb0225
LP		 125
126 unit_unwatch_timer(u, &s->timer_watch);
6cf6bbc2
LP		 127
128 /* Make sure no service instance refers to us anymore. */
129 LIST_FOREACH(units_per_type, i, u->meta.manager->units_per_type[UNIT_SERVICE]) {
130 Service *service = (Service *) i;
131
132 if (service->socket == s)
133 service->socket = NULL;
134 }
5cb5a6ff
LP		 135}
136
b15bdda8
LP		 137static int socket_instantiate_service(Socket *s) {
138 char *prefix, *name;
139 int r;
140 Unit *u;
141
142 assert(s);
143
144 /* This fills in s->service if it isn't filled in yet. For
145 * Accept=yes sockets we create the next connection service
146 * here. For Accept=no this is mostly a NOP since the service
147 * is figured out at load time anyway. */
148
149 if (s->service)
150 return 0;
151
152 assert(s->accept);
153
154 if (!(prefix = unit_name_to_prefix(s->meta.id)))
155 return -ENOMEM;
156
157 r = asprintf(&name, "%s@%u.service", prefix, s->n_accepted);
158 free(prefix);
159
160 if (r < 0)
161 return -ENOMEM;
162
163 r = manager_load_unit(s->meta.manager, name, NULL, NULL, &u);
164 free(name);
165
166 if (r < 0)
167 return r;
168
6c073082 169 u->meta.no_gc = true;
b15bdda8
LP		 170 s->service = SERVICE(u);
171 return 0;
172}
173
4f2d528d
LP		 174static bool have_non_accept_socket(Socket *s) {
175 SocketPort *p;
176
177 assert(s);
178
179 if (!s->accept)
180 return true;
181
dd5ad9d4
LP		 182 LIST_FOREACH(port, p, s->ports) {
183
184 if (p->type != SOCKET_SOCKET)
185 return true;
186
4f2d528d
LP		 187 if (!socket_address_can_accept(&p->address))
188 return true;
dd5ad9d4 189 }
4f2d528d
LP		 190
191 return false;
192}
193
194static int socket_verify(Socket *s) {
195 assert(s);
196
4cd1fbcc 197 if (s->meta.load_state != UNIT_LOADED)
4f2d528d
LP		 198 return 0;
199
200 if (!s->ports) {
4cd1fbcc 201 log_error("%s lacks Listen setting. Refusing.", s->meta.id);
4f2d528d
LP		 202 return -EINVAL;
203 }
204
0009d2a6
LP		 205 if (s->accept && have_non_accept_socket(s)) {
206 log_error("%s configured for accepting sockets, but sockets are non-accepting. Refusing.", s->meta.id);
207 return -EINVAL;
208 }
209
6cf6bbc2 210 if (s->accept && s->max_connections <= 0) {
4d0e5dbd
LP		 211 log_error("%s's MaxConnection setting too small. Refusing.", s->meta.id);
212 return -EINVAL;
213 }
214
2e22afe9 215 if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
4d0e5dbd 216 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
6cf6bbc2
LP		 217 return -EINVAL;
218 }
219
4f2d528d
LP		 220 return 0;
221}
222
6e2ef85b
LP		 223static bool socket_needs_mount(Socket *s, const char *prefix) {
224 SocketPort *p;
225
226 assert(s);
227
228 LIST_FOREACH(port, p, s->ports) {
229
230 if (p->type == SOCKET_SOCKET) {
231 if (socket_address_needs_mount(&p->address, prefix))
232 return true;
233 } else {
234 assert(p->type == SOCKET_FIFO);
235 if (path_startswith(p->path, prefix))
236 return true;
237 }
238 }
239
240 return false;
241}
242
243int socket_add_one_mount_link(Socket *s, Mount *m) {
244 int r;
245
246 assert(s);
247 assert(m);
248
249 if (s->meta.load_state != UNIT_LOADED ||
250 m->meta.load_state != UNIT_LOADED)
251 return 0;
252
253 if (!socket_needs_mount(s, m->where))
254 return 0;
255
2c966c03 256 if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0)
6e2ef85b
LP		 257 return r;
258
259 return 0;
260}
261
262static int socket_add_mount_links(Socket *s) {
263 Meta *other;
264 int r;
265
266 assert(s);
267
268 LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
269 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
270 return r;
271
272 return 0;
273}
274
275static int socket_add_device_link(Socket *s) {
276 char *t;
277 int r;
278
279 assert(s);
280
281 if (!s->bind_to_device)
282 return 0;
283
284 if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
285 return -ENOMEM;
286
287 r = unit_add_node_link(UNIT(s), t, false);
288 free(t);
289
290 return r;
291}
292
a40eb732
LP		 293static int socket_add_default_dependencies(Socket *s) {
294 int r;
295 assert(s);
296
297 if (s->meta.manager->running_as == MANAGER_SYSTEM)
298 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
299 return r;
300
69dd2852 301 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_SHUTDOWN_TARGET, NULL, true);
a40eb732
LP		 302}
303
e537352b
LP		 304static int socket_load(Unit *u) {
305 Socket *s = SOCKET(u);
306 int r;
44d8db9e 307
e537352b
LP		 308 assert(u);
309 assert(u->meta.load_state == UNIT_STUB);
44d8db9e 310
e537352b 311 if ((r = unit_load_fragment_and_dropin(u)) < 0)
23a177ef 312 return r;
44d8db9e 313
23a177ef 314 /* This is a new unit? Then let's add in some extras */
e537352b 315 if (u->meta.load_state == UNIT_LOADED) {
44d8db9e 316
4f2d528d 317 if (have_non_accept_socket(s)) {
25366e09 318 if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)) < 0)
4f2d528d 319 return r;
23a177ef 320
701cc384 321 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
4f2d528d
LP		 322 return r;
323 }
44d8db9e 324
6e2ef85b
LP		 325 if ((r = socket_add_mount_links(s)) < 0)
326 return r;
327
328 if ((r = socket_add_device_link(s)) < 0)
329 return r;
330
23a177ef
LP		 331 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
332 return r;
333
334 if ((r = unit_add_default_cgroup(u)) < 0)
335 return r;
a40eb732
LP		 336
337 if (s->meta.default_dependencies)
338 if ((r = socket_add_default_dependencies(s)) < 0)
339 return r;
23a177ef
LP		 340 }
341
4f2d528d 342 return socket_verify(s);
44d8db9e
LP		 343}
344
542563ba
LP		 345static const char* listen_lookup(int type) {
346
347 if (type == SOCK_STREAM)
348 return "ListenStream";
349 else if (type == SOCK_DGRAM)
350 return "ListenDatagram";
351 else if (type == SOCK_SEQPACKET)
352 return "ListenSequentialPacket";
353
034c6ed7 354 assert_not_reached("Unknown socket type");
542563ba
LP		 355 return NULL;
356}
357
87f0e418 358static void socket_dump(Unit *u, FILE *f, const char *prefix) {
5cb5a6ff 359
5cb5a6ff 360 SocketExecCommand c;
87f0e418 361 Socket *s = SOCKET(u);
542563ba 362 SocketPort *p;
82ba9f08
LP		 363 const char *prefix2;
364 char *p2;
5cb5a6ff
LP		 365
366 assert(s);
fa068367 367 assert(f);
5cb5a6ff 368
82ba9f08
LP		 369 p2 = strappend(prefix, "\t");
370 prefix2 = p2 ? p2 : prefix;
c43d20a0 371
5cb5a6ff
LP		 372 fprintf(f,
373 "%sSocket State: %s\n"
542563ba 374 "%sBindIPv6Only: %s\n"
b5a0699f
LP		 375 "%sBacklog: %u\n"
376 "%sSocketMode: %04o\n"
4fd5948e
LP		 377 "%sDirectoryMode: %04o\n"
378 "%sKeepAlive: %s\n"
cebf8b20
TT		 379 "%sFreeBind: %s\n"
380 "%sTCPCongestion: %s\n",
a16e1123 381 prefix, socket_state_to_string(s->state),
c0120d99 382 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
b5a0699f
LP		 383 prefix, s->backlog,
384 prefix, s->socket_mode,
4fd5948e
LP		 385 prefix, s->directory_mode,
386 prefix, yes_no(s->keep_alive),
cebf8b20
TT		 387 prefix, yes_no(s->free_bind),
388 prefix, s->tcp_congestion);
542563ba 389
70123e68
LP		 390 if (s->control_pid > 0)
391 fprintf(f,
bb00e604
LP		 392 "%sControl PID: %lu\n",
393 prefix, (unsigned long) s->control_pid);
70123e68 394
acbb0225
LP		 395 if (s->bind_to_device)
396 fprintf(f,
397 "%sBindToDevice: %s\n",
398 prefix, s->bind_to_device);
399
4f2d528d
LP		 400 if (s->accept)
401 fprintf(f,
6cf6bbc2
LP		 402 "%sAccepted: %u\n"
403 "%sNConnections: %u\n"
404 "%sMaxConnections: %u\n",
405 prefix, s->n_accepted,
406 prefix, s->n_connections,
407 prefix, s->max_connections);
4f2d528d 408
4fd5948e
LP		 409 if (s->priority >= 0)
410 fprintf(f,
411 "%sPriority: %i\n",
412 prefix, s->priority);
413
414 if (s->receive_buffer > 0)
415 fprintf(f,
416 "%sReceiveBuffer: %zu\n",
417 prefix, s->receive_buffer);
418
419 if (s->send_buffer > 0)
420 fprintf(f,
421 "%sSendBuffer: %zu\n",
422 prefix, s->send_buffer);
423
424 if (s->ip_tos >= 0)
425 fprintf(f,
426 "%sIPTOS: %i\n",
427 prefix, s->ip_tos);
428
429 if (s->ip_ttl >= 0)
430 fprintf(f,
431 "%sIPTTL: %i\n",
432 prefix, s->ip_ttl);
433
434 if (s->pipe_size > 0)
435 fprintf(f,
436 "%sPipeSize: %zu\n",
437 prefix, s->pipe_size);
438
439 if (s->mark >= 0)
440 fprintf(f,
441 "%sMark: %i\n",
442 prefix, s->mark);
443
034c6ed7 444 LIST_FOREACH(port, p, s->ports) {
5cb5a6ff 445
542563ba
LP		 446 if (p->type == SOCKET_SOCKET) {
447 const char *t;
448 int r;
e364ad06 449 char *k = NULL;
542563ba
LP		 450
451 if ((r = socket_address_print(&p->address, &k)) < 0)
452 t = strerror(-r);
453 else
454 t = k;
455
e364ad06 456 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), t);
542563ba
LP		 457 free(k);
458 } else
459 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
460 }
5cb5a6ff
LP		 461
462 exec_context_dump(&s->exec_context, f, prefix);
463
e537352b 464 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
c43d20a0
LP		 465 if (!s->exec_command[c])
466 continue;
5cb5a6ff 467
40d50879 468 fprintf(f, "%s-> %s:\n",
a16e1123 469 prefix, socket_exec_command_to_string(c));
c43d20a0
LP		 470
471 exec_command_dump_list(s->exec_command[c], f, prefix2);
5cb5a6ff 472 }
c43d20a0 473
82ba9f08 474 free(p2);
5cb5a6ff
LP		 475}
476
4f2d528d
LP		 477static int instance_from_socket(int fd, unsigned nr, char **instance) {
478 socklen_t l;
479 char *r;
480 union {
481 struct sockaddr sa;
482 struct sockaddr_un un;
483 struct sockaddr_in in;
484 struct sockaddr_in6 in6;
485 struct sockaddr_storage storage;
486 } local, remote;
487
488 assert(fd >= 0);
489 assert(instance);
490
491 l = sizeof(local);
492 if (getsockname(fd, &local.sa, &l) < 0)
493 return -errno;
494
495 l = sizeof(remote);
496 if (getpeername(fd, &remote.sa, &l) < 0)
497 return -errno;
498
499 switch (local.sa.sa_family) {
500
501 case AF_INET: {
502 uint32_t
503 a = ntohl(local.in.sin_addr.s_addr),
504 b = ntohl(remote.in.sin_addr.s_addr);
505
506 if (asprintf(&r,
b15bdda8 507 "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
4f2d528d
LP		 508 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
509 ntohs(local.in.sin_port),
510 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
511 ntohs(remote.in.sin_port)) < 0)
512 return -ENOMEM;
513
514 break;
515 }
516
517 case AF_INET6: {
2b061f5a
LP		 518 static const char ipv4_prefix[] = {
519 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
520 };
521
522 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
523 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
524 const uint8_t
525 *a = local.in6.sin6_addr.s6_addr+12,
526 *b = remote.in6.sin6_addr.s6_addr+12;
527
528 if (asprintf(&r,
b15bdda8 529 "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
2b061f5a
LP		 530 a[0], a[1], a[2], a[3],
531 ntohs(local.in6.sin6_port),
532 b[0], b[1], b[2], b[3],
533 ntohs(remote.in6.sin6_port)) < 0)
534 return -ENOMEM;
535 } else {
536 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
537
538 if (asprintf(&r,
b15bdda8 539 "%s:%u-%s:%u",
2b061f5a
LP		 540 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
541 ntohs(local.in6.sin6_port),
542 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
543 ntohs(remote.in6.sin6_port)) < 0)
544 return -ENOMEM;
545 }
4f2d528d
LP		 546
547 break;
548 }
549
550 case AF_UNIX: {
551 struct ucred ucred;
552
553 l = sizeof(ucred);
554 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
555 return -errno;
556
557 if (asprintf(&r,
bb00e604 558 "%u-%lu-%lu",
4f2d528d 559 nr,
bb00e604
LP		 560 (unsigned long) ucred.pid,
561 (unsigned long) ucred.uid) < 0)
4f2d528d
LP		 562 return -ENOMEM;
563
564 break;
565 }
566
567 default:
568 assert_not_reached("Unhandled socket type.");
569 }
570
571 *instance = r;
572 return 0;
573}
574
034c6ed7 575static void socket_close_fds(Socket *s) {
83c60c9f
LP		 576 SocketPort *p;
577
578 assert(s);
579
034c6ed7 580 LIST_FOREACH(port, p, s->ports) {
83c60c9f
LP		 581 if (p->fd < 0)
582 continue;
583
acbb0225 584 unit_unwatch_fd(UNIT(s), &p->fd_watch);
a16e1123
LP		 585 close_nointr_nofail(p->fd);
586
587 /* One little note: we should never delete any sockets
588 * in the file system here! After all some other
589 * process we spawned might still have a reference of
590 * this fd and wants to continue to use it. Therefore
591 * we delete sockets in the file system before we
592 * create a new one, not after we stopped using
593 * one! */
9152c765 594
83c60c9f
LP		 595 p->fd = -1;
596 }
597}
598
4fd5948e
LP		 599static void socket_apply_socket_options(Socket *s, int fd) {
600 assert(s);
601 assert(fd >= 0);
602
603 if (s->keep_alive) {
604 int b = s->keep_alive;
605 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
606 log_warning("SO_KEEPALIVE failed: %m");
607 }
608
609 if (s->priority >= 0)
610 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
611 log_warning("SO_PRIORITY failed: %m");
612
613 if (s->receive_buffer > 0) {
614 int value = (int) s->receive_buffer;
615 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
616 log_warning("SO_RCVBUF failed: %m");
617 }
618
619 if (s->send_buffer > 0) {
620 int value = (int) s->send_buffer;
621 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
622 log_warning("SO_SNDBUF failed: %m");
623 }
624
625 if (s->mark >= 0)
626 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
627 log_warning("SO_MARK failed: %m");
628
629 if (s->ip_tos >= 0)
630 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
631 log_warning("IP_TOS failed: %m");
632
46925ac5
LP		 633 if (s->ip_ttl >= 0) {
634 int r, x;
635
636 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
637 x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
638
639 if (r < 0 && x < 0)
640 log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
641 }
cebf8b20
TT		 642
643 if (s->tcp_congestion)
644 if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0)
645 log_warning("TCP_CONGESTION failed: %m");
4fd5948e
LP		 646}
647
b15bdda8 648static void socket_apply_fifo_options(Socket *s, int fd) {
4fd5948e
LP		 649 assert(s);
650 assert(fd >= 0);
651
652 if (s->pipe_size > 0)
653 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
654 log_warning("F_SETPIPE_SZ: %m");
655}
656
7a58bfa4 657
b15bdda8
LP		 658static int fifo_address_create(
659 const char *path,
660 mode_t directory_mode,
661 mode_t socket_mode,
56cf987f 662 const char *label,
b15bdda8
LP		 663 int *_fd) {
664
7a58bfa4 665 int fd = -1, r = 0;
b15bdda8
LP		 666 struct stat st;
667 mode_t old_mask;
668
669 assert(path);
670 assert(_fd);
671
672 mkdir_parents(path, directory_mode);
673
56cf987f
DW		 674 if ((r = label_fifofile_set(label, path)) < 0)
675 goto fail;
b15bdda8
LP		 676
677 /* Enforce the right access mode for the fifo */
678 old_mask = umask(~ socket_mode);
679
680 /* Include the original umask in our mask */
681 umask(~socket_mode | old_mask);
682
683 r = mkfifo(path, socket_mode);
684 umask(old_mask);
685
686 if (r < 0) {
687 r = -errno;
688 goto fail;
689 }
690
691 if ((fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
692 r = -errno;
693 goto fail;
694 }
695
56cf987f 696 label_file_clear();
7a58bfa4 697
b15bdda8
LP		 698 if (fstat(fd, &st) < 0) {
699 r = -errno;
700 goto fail;
701 }
702
703 if (!S_ISFIFO(st.st_mode) ||
de0200fc 704 (st.st_mode & 0777) != (socket_mode & ~old_mask) ||
b15bdda8
LP		 705 st.st_uid != getuid() ||
706 st.st_gid != getgid()) {
707
708 r = -EEXIST;
709 goto fail;
710 }
711
712 *_fd = fd;
713 return 0;
714
715fail:
56cf987f
DW		 716 label_file_clear();
717
b15bdda8
LP		 718 if (fd >= 0)
719 close_nointr_nofail(fd);
720
721 return r;
722}
723
034c6ed7 724static int socket_open_fds(Socket *s) {
83c60c9f
LP		 725 SocketPort *p;
726 int r;
56cf987f 727 char *label = NULL;
83c60c9f
LP		 728
729 assert(s);
730
b15bdda8
LP		 731 if ((r = socket_instantiate_service(s)) < 0)
732 return r;
733
56cf987f
DW		 734 if ((r = label_get_socket_label_from_exe(s->service->exec_command[SERVICE_EXEC_START]->path, &label)) < 0)
735 return r;
b15bdda8 736
034c6ed7 737 LIST_FOREACH(port, p, s->ports) {
83c60c9f 738
034c6ed7
LP		 739 if (p->fd >= 0)
740 continue;
83c60c9f
LP		 741
742 if (p->type == SOCKET_SOCKET) {
743
b5a0699f
LP		 744 if ((r = socket_address_listen(
745 &p->address,
746 s->backlog,
747 s->bind_ipv6_only,
748 s->bind_to_device,
4fd5948e 749 s->free_bind,
b5a0699f
LP		 750 s->directory_mode,
751 s->socket_mode,
56cf987f 752 label,
b5a0699f 753 &p->fd)) < 0)
83c60c9f
LP		 754 goto rollback;
755
4fd5948e
LP		 756 socket_apply_socket_options(s, p->fd);
757
b15bdda8 758 } else if (p->type == SOCKET_FIFO) {
83c60c9f 759
b15bdda8
LP		 760 if ((r = fifo_address_create(
761 p->path,
762 s->directory_mode,
763 s->socket_mode,
56cf987f 764 label,
b15bdda8 765 &p->fd)) < 0)
83c60c9f 766 goto rollback;
83c60c9f 767
b15bdda8 768 socket_apply_fifo_options(s, p->fd);
83c60c9f 769
b15bdda8
LP		 770 } else
771 assert_not_reached("Unknown port type");
034c6ed7
LP		 772 }
773
56cf987f 774 label_free(label);
034c6ed7
LP		 775 return 0;
776
777rollback:
778 socket_close_fds(s);
56cf987f 779 label_free(label);
034c6ed7
LP		 780 return r;
781}
782
783static void socket_unwatch_fds(Socket *s) {
784 SocketPort *p;
9152c765 785
034c6ed7
LP		 786 assert(s);
787
788 LIST_FOREACH(port, p, s->ports) {
789 if (p->fd < 0)
790 continue;
791
acbb0225 792 unit_unwatch_fd(UNIT(s), &p->fd_watch);
83c60c9f 793 }
034c6ed7
LP		 794}
795
796static int socket_watch_fds(Socket *s) {
797 SocketPort *p;
798 int r;
799
800 assert(s);
83c60c9f 801
034c6ed7
LP		 802 LIST_FOREACH(port, p, s->ports) {
803 if (p->fd < 0)
804 continue;
805
cabab516 806 p->fd_watch.socket_accept =
4f2d528d 807 s->accept &&
dd5ad9d4 808 p->type == SOCKET_SOCKET &&
4f2d528d
LP		 809 socket_address_can_accept(&p->address);
810
f94ea366 811 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
034c6ed7
LP		 812 goto fail;
813 }
83c60c9f 814
542563ba 815 return 0;
83c60c9f 816
034c6ed7
LP		 817fail:
818 socket_unwatch_fds(s);
819 return r;
820}
821
822static void socket_set_state(Socket *s, SocketState state) {
823 SocketState old_state;
824 assert(s);
825
826 old_state = s->state;
827 s->state = state;
828
829 if (state != SOCKET_START_PRE &&
830 state != SOCKET_START_POST &&
831 state != SOCKET_STOP_PRE &&
832 state != SOCKET_STOP_PRE_SIGTERM &&
833 state != SOCKET_STOP_PRE_SIGKILL &&
834 state != SOCKET_STOP_POST &&
80876c20
LP		 835 state != SOCKET_FINAL_SIGTERM &&
836 state != SOCKET_FINAL_SIGKILL) {
acbb0225 837 unit_unwatch_timer(UNIT(s), &s->timer_watch);
5e94833f 838 socket_unwatch_control_pid(s);
034c6ed7 839 s->control_command = NULL;
a16e1123 840 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
e537352b 841 }
034c6ed7 842
a16e1123
LP		 843 if (state != SOCKET_LISTENING)
844 socket_unwatch_fds(s);
845
034c6ed7
LP		 846 if (state != SOCKET_START_POST &&
847 state != SOCKET_LISTENING &&
848 state != SOCKET_RUNNING &&
849 state != SOCKET_STOP_PRE &&
850 state != SOCKET_STOP_PRE_SIGTERM &&
851 state != SOCKET_STOP_PRE_SIGKILL)
852 socket_close_fds(s);
853
e537352b 854 if (state != old_state)
40d50879 855 log_debug("%s changed %s -> %s",
a16e1123
LP		 856 s->meta.id,
857 socket_state_to_string(old_state),
858 socket_state_to_string(state));
acbb0225
LP		 859
860 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
034c6ed7
LP		 861}
862
a16e1123
LP		 863static int socket_coldplug(Unit *u) {
864 Socket *s = SOCKET(u);
865 int r;
866
867 assert(s);
868 assert(s->state == SOCKET_DEAD);
869
870 if (s->deserialized_state != s->state) {
871
872 if (s->deserialized_state == SOCKET_START_PRE ||
873 s->deserialized_state == SOCKET_START_POST ||
874 s->deserialized_state == SOCKET_STOP_PRE ||
875 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
876 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
877 s->deserialized_state == SOCKET_STOP_POST ||
878 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
879 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
880
881 if (s->control_pid <= 0)
882 return -EBADMSG;
883
884 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
885 return r;
886
887 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
888 return r;
889 }
890
891 if (s->deserialized_state == SOCKET_START_POST ||
892 s->deserialized_state == SOCKET_LISTENING ||
893 s->deserialized_state == SOCKET_RUNNING ||
894 s->deserialized_state == SOCKET_STOP_PRE ||
895 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
896 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
897 if ((r = socket_open_fds(s)) < 0)
898 return r;
899
900 if (s->deserialized_state == SOCKET_LISTENING)
901 if ((r = socket_watch_fds(s)) < 0)
902 return r;
903
904 socket_set_state(s, s->deserialized_state);
905 }
906
907 return 0;
908}
909
e537352b 910static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
034c6ed7
LP		 911 pid_t pid;
912 int r;
9e2f7c11 913 char **argv;
034c6ed7
LP		 914
915 assert(s);
916 assert(c);
917 assert(_pid);
918
e537352b
LP		 919 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
920 goto fail;
034c6ed7 921
9e2f7c11
LP		 922 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
923 r = -ENOMEM;
924 goto fail;
925 }
926
927 r = exec_spawn(c,
928 argv,
929 &s->exec_context,
930 NULL, 0,
1137a57c 931 s->meta.manager->environment,
9e2f7c11
LP		 932 true,
933 true,
1e3ad081 934 true,
4cd1fbcc
LP		 935 s->meta.manager->confirm_spawn,
936 s->meta.cgroup_bondings,
9e2f7c11
LP		 937 &pid);
938
939 strv_free(argv);
940 if (r < 0)
034c6ed7
LP		 941 goto fail;
942
87f0e418 943 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
034c6ed7
LP		 944 /* FIXME: we need to do something here */
945 goto fail;
83c60c9f 946
034c6ed7
LP		 947 *_pid = pid;
948
949 return 0;
950
951fail:
e537352b 952 unit_unwatch_timer(UNIT(s), &s->timer_watch);
83c60c9f
LP		 953
954 return r;
542563ba
LP		 955}
956
034c6ed7
LP		 957static void socket_enter_dead(Socket *s, bool success) {
958 assert(s);
959
960 if (!success)
961 s->failure = true;
962
18c78fb1 963 socket_set_state(s, s->failure ? SOCKET_MAINTENANCE : SOCKET_DEAD);
034c6ed7
LP		 964}
965
80876c20
LP		 966static void socket_enter_signal(Socket *s, SocketState state, bool success);
967
034c6ed7
LP		 968static void socket_enter_stop_post(Socket *s, bool success) {
969 int r;
970 assert(s);
971
972 if (!success)
973 s->failure = true;
974
5e94833f
LP		 975 socket_unwatch_control_pid(s);
976
a16e1123
LP		 977 s->control_command_id = SOCKET_EXEC_STOP_POST;
978
80876c20 979 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
e537352b 980 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 981 goto fail;
982
80876c20
LP		 983 socket_set_state(s, SOCKET_STOP_POST);
984 } else
985 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
034c6ed7
LP		 986
987 return;
988
989fail:
6cf6bbc2 990 log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
80876c20 991 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
034c6ed7
LP		 992}
993
994static void socket_enter_signal(Socket *s, SocketState state, bool success) {
995 int r;
80876c20 996 bool sent = false;
034c6ed7
LP		 997
998 assert(s);
999
1000 if (!success)
1001 s->failure = true;
1002
2e22afe9
LP		 1003 if (s->exec_context.kill_mode != KILL_NONE) {
1004 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
034c6ed7 1005
2e22afe9 1006 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
50159e6a 1007
4cd1fbcc 1008 if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig)) < 0) {
50159e6a
LP		 1009 if (r != -EAGAIN && r != -ESRCH)
1010 goto fail;
1011 } else
1012 sent = true;
034c6ed7 1013 }
50159e6a 1014
80876c20 1015 if (!sent && s->control_pid > 0)
2e22afe9 1016 if (kill(s->exec_context.kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
50159e6a
LP		 1017 r = -errno;
1018 goto fail;
1019 }
d6ea93e3 1020 }
034c6ed7 1021
e93bc5a6 1022 if (sent && s->control_pid > 0) {
80876c20
LP		 1023 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1024 goto fail;
d6ea93e3 1025
80876c20
LP		 1026 socket_set_state(s, state);
1027 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1028 socket_enter_stop_post(s, true);
1029 else
034c6ed7
LP		 1030 socket_enter_dead(s, true);
1031
1032 return;
1033
1034fail:
9e2f7c11 1035 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1036
1037 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1038 socket_enter_stop_post(s, false);
1039 else
1040 socket_enter_dead(s, false);
1041}
1042
1043static void socket_enter_stop_pre(Socket *s, bool success) {
1044 int r;
1045 assert(s);
1046
1047 if (!success)
1048 s->failure = true;
1049
5e94833f
LP		 1050 socket_unwatch_control_pid(s);
1051
a16e1123
LP		 1052 s->control_command_id = SOCKET_EXEC_STOP_PRE;
1053
80876c20 1054 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
e537352b 1055 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1056 goto fail;
1057
80876c20
LP		 1058 socket_set_state(s, SOCKET_STOP_PRE);
1059 } else
034c6ed7
LP		 1060 socket_enter_stop_post(s, true);
1061
1062 return;
1063
1064fail:
6cf6bbc2 1065 log_warning("%s failed to run 'stop-pre' task: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1066 socket_enter_stop_post(s, false);
1067}
1068
e9af15c3
LP		 1069static void socket_enter_listening(Socket *s) {
1070 int r;
1071 assert(s);
1072
1073 if ((r = socket_watch_fds(s)) < 0) {
9e2f7c11 1074 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
e9af15c3
LP		 1075 goto fail;
1076 }
1077
1078 socket_set_state(s, SOCKET_LISTENING);
1079 return;
1080
1081fail:
1082 socket_enter_stop_pre(s, false);
1083}
1084
034c6ed7
LP		 1085static void socket_enter_start_post(Socket *s) {
1086 int r;
1087 assert(s);
1088
e9af15c3 1089 if ((r = socket_open_fds(s)) < 0) {
9e2f7c11 1090 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1091 goto fail;
1092 }
1093
5e94833f
LP		 1094 socket_unwatch_control_pid(s);
1095
a16e1123
LP		 1096 s->control_command_id = SOCKET_EXEC_START_POST;
1097
80876c20 1098 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
e537352b 1099 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
6cf6bbc2 1100 log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1101 goto fail;
1102 }
1103
80876c20
LP		 1104 socket_set_state(s, SOCKET_START_POST);
1105 } else
e9af15c3 1106 socket_enter_listening(s);
034c6ed7
LP		 1107
1108 return;
1109
1110fail:
1111 socket_enter_stop_pre(s, false);
1112}
1113
1114static void socket_enter_start_pre(Socket *s) {
1115 int r;
1116 assert(s);
1117
5e94833f
LP		 1118 socket_unwatch_control_pid(s);
1119
a16e1123
LP		 1120 s->control_command_id = SOCKET_EXEC_START_PRE;
1121
80876c20 1122 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
e537352b 1123 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1124 goto fail;
1125
80876c20
LP		 1126 socket_set_state(s, SOCKET_START_PRE);
1127 } else
034c6ed7
LP		 1128 socket_enter_start_post(s);
1129
1130 return;
1131
1132fail:
6cf6bbc2 1133 log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
034c6ed7
LP		 1134 socket_enter_dead(s, false);
1135}
1136
4f2d528d 1137static void socket_enter_running(Socket *s, int cfd) {
034c6ed7 1138 int r;
398ef8ba 1139 DBusError error;
034c6ed7
LP		 1140
1141 assert(s);
398ef8ba 1142 dbus_error_init(&error);
034c6ed7 1143
ba3e67a7
LP		 1144 /* We don't take connections anymore if we are supposed to
1145 * shut down anyway */
1146 if (s->meta.job && s->meta.job->type == JOB_STOP) {
7c610628
LP		 1147 if (cfd >= 0)
1148 close_nointr_nofail(cfd);
1149 else {
1150 /* Flush all sockets by closing and reopening them */
1151 socket_close_fds(s);
1152
1153 if ((r = socket_watch_fds(s)) < 0) {
1154 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
1155 socket_enter_stop_pre(s, false);
1156 }
1157 }
1158
ba3e67a7
LP		 1159 return;
1160 }
1161
4f2d528d 1162 if (cfd < 0) {
398ef8ba 1163 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, &error, NULL)) < 0)
4f2d528d
LP		 1164 goto fail;
1165
1166 socket_set_state(s, SOCKET_RUNNING);
1167 } else {
b4f10a5e 1168 char *prefix, *instance = NULL, *name;
b15bdda8 1169 Service *service;
4f2d528d 1170
6cf6bbc2
LP		 1171 if (s->n_connections >= s->max_connections) {
1172 log_warning("Too many incoming connections (%u)", s->n_connections);
1173 close_nointr_nofail(cfd);
1174 return;
1175 }
1176
b15bdda8
LP		 1177 if ((r = socket_instantiate_service(s)) < 0)
1178 goto fail;
1179
1180 if ((r = instance_from_socket(cfd, s->n_accepted, &instance)) < 0)
4f2d528d
LP		 1181 goto fail;
1182
4cd1fbcc 1183 if (!(prefix = unit_name_to_prefix(s->meta.id))) {
4f2d528d
LP		 1184 free(instance);
1185 r = -ENOMEM;
1186 goto fail;
1187 }
1188
1189 name = unit_name_build(prefix, instance, ".service");
1190 free(prefix);
1191 free(instance);
1192
b6dbbe1c 1193 if (!name) {
4f2d528d 1194 r = -ENOMEM;
b6dbbe1c
LP		 1195 goto fail;
1196 }
4f2d528d 1197
b15bdda8
LP		 1198 if ((r = unit_add_name(UNIT(s->service), name)) < 0) {
1199 free(name);
4f2d528d 1200 goto fail;
b15bdda8
LP		 1201 }
1202
1203 service = s->service;
1204 s->service = NULL;
1205 s->n_accepted ++;
4f2d528d 1206
6c073082
LP		 1207 service->meta.no_gc = false;
1208
b15bdda8
LP		 1209 unit_choose_id(UNIT(service), name);
1210 free(name);
1211
1212 if ((r = service_set_socket_fd(service, cfd, s)) < 0)
4f2d528d
LP		 1213 goto fail;
1214
1215 cfd = -1;
6cf6bbc2
LP		 1216 s->n_connections ++;
1217
b15bdda8 1218 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(service), JOB_REPLACE, true, &error, NULL)) < 0)
4f2d528d
LP		 1219 goto fail;
1220 }
034c6ed7 1221
034c6ed7
LP		 1222 return;
1223
1224fail:
398ef8ba 1225 log_warning("%s failed to queue socket startup job: %s", s->meta.id, bus_error(&error, r));
80876c20 1226 socket_enter_stop_pre(s, false);
4f2d528d
LP		 1227
1228 if (cfd >= 0)
1229 close_nointr_nofail(cfd);
398ef8ba
LP		 1230
1231 dbus_error_free(&error);
034c6ed7
LP		 1232}
1233
1234static void socket_run_next(Socket *s, bool success) {
1235 int r;
1236
1237 assert(s);
1238 assert(s->control_command);
1239 assert(s->control_command->command_next);
1240
1241 if (!success)
1242 s->failure = true;
1243
5e94833f
LP		 1244 socket_unwatch_control_pid(s);
1245
034c6ed7
LP		 1246 s->control_command = s->control_command->command_next;
1247
e537352b 1248 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1249 goto fail;
1250
1251 return;
1252
1253fail:
6cf6bbc2 1254 log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
80876c20
LP		 1255
1256 if (s->state == SOCKET_START_POST)
1257 socket_enter_stop_pre(s, false);
034c6ed7
LP		 1258 else if (s->state == SOCKET_STOP_POST)
1259 socket_enter_dead(s, false);
1260 else
80876c20 1261 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
034c6ed7
LP		 1262}
1263
87f0e418
LP		 1264static int socket_start(Unit *u) {
1265 Socket *s = SOCKET(u);
83c60c9f
LP		 1266
1267 assert(s);
1268
034c6ed7
LP		 1269 /* We cannot fulfill this request right now, try again later
1270 * please! */
1271 if (s->state == SOCKET_STOP_PRE ||
1272 s->state == SOCKET_STOP_PRE_SIGKILL ||
1273 s->state == SOCKET_STOP_PRE_SIGTERM ||
1274 s->state == SOCKET_STOP_POST ||
80876c20
LP		 1275 s->state == SOCKET_FINAL_SIGTERM ||
1276 s->state == SOCKET_FINAL_SIGKILL)
034c6ed7
LP		 1277 return -EAGAIN;
1278
83c60c9f
LP		 1279 if (s->state == SOCKET_START_PRE ||
1280 s->state == SOCKET_START_POST)
034c6ed7 1281 return 0;
83c60c9f 1282
034c6ed7 1283 /* Cannot run this without the service being around */
4f2d528d
LP		 1284 if (s->service) {
1285 if (s->service->meta.load_state != UNIT_LOADED)
1286 return -ENOENT;
1287
1288 /* If the service is alredy actvie we cannot start the
1289 * socket */
1290 if (s->service->state != SERVICE_DEAD &&
18c78fb1 1291 s->service->state != SERVICE_MAINTENANCE &&
4f2d528d
LP		 1292 s->service->state != SERVICE_AUTO_RESTART)
1293 return -EBUSY;
1294 }
e537352b 1295
18c78fb1 1296 assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTENANCE);
83c60c9f 1297
034c6ed7
LP		 1298 s->failure = false;
1299 socket_enter_start_pre(s);
1300 return 0;
1301}
83c60c9f 1302
87f0e418
LP		 1303static int socket_stop(Unit *u) {
1304 Socket *s = SOCKET(u);
034c6ed7
LP		 1305
1306 assert(s);
1307
e537352b
LP		 1308 /* Already on it */
1309 if (s->state == SOCKET_STOP_PRE ||
1310 s->state == SOCKET_STOP_PRE_SIGTERM ||
1311 s->state == SOCKET_STOP_PRE_SIGKILL ||
1312 s->state == SOCKET_STOP_POST ||
80876c20 1313 s->state == SOCKET_FINAL_SIGTERM ||
3f6c78dc 1314 s->state == SOCKET_FINAL_SIGKILL)
e537352b
LP		 1315 return 0;
1316
3f6c78dc
LP		 1317 /* If there's already something running we go directly into
1318 * kill mode. */
1319 if (s->state == SOCKET_START_PRE ||
1320 s->state == SOCKET_START_POST) {
1321 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, true);
1322 return -EAGAIN;
1323 }
1324
034c6ed7 1325 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
83c60c9f 1326
034c6ed7 1327 socket_enter_stop_pre(s, true);
542563ba
LP		 1328 return 0;
1329}
1330
a16e1123
LP		 1331static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1332 Socket *s = SOCKET(u);
1333 SocketPort *p;
1334 int r;
1335
1336 assert(u);
1337 assert(f);
1338 assert(fds);
1339
1340 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1341 unit_serialize_item(u, f, "failure", yes_no(s->failure));
1342 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1343
1344 if (s->control_pid > 0)
5925dd3c 1345 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
a16e1123
LP		 1346
1347 if (s->control_command_id >= 0)
1348 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1349
1350 LIST_FOREACH(port, p, s->ports) {
1351 int copy;
1352
1353 if (p->fd < 0)
1354 continue;
1355
1356 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1357 return copy;
1358
1359 if (p->type == SOCKET_SOCKET) {
1360 char *t;
1361
1362 if ((r = socket_address_print(&p->address, &t)) < 0)
1363 return r;
1364
27ca8d7a 1365 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
a16e1123
LP		 1366 free(t);
1367 } else {
1368 assert(p->type == SOCKET_FIFO);
1369 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1370 }
1371 }
1372
1373 return 0;
1374}
1375
1376static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1377 Socket *s = SOCKET(u);
a16e1123
LP		 1378
1379 assert(u);
1380 assert(key);
1381 assert(value);
1382 assert(fds);
1383
1384 if (streq(key, "state")) {
1385 SocketState state;
1386
1387 if ((state = socket_state_from_string(value)) < 0)
1388 log_debug("Failed to parse state value %s", value);
1389 else
1390 s->deserialized_state = state;
1391 } else if (streq(key, "failure")) {
1392 int b;
1393
1394 if ((b = parse_boolean(value)) < 0)
1395 log_debug("Failed to parse failure value %s", value);
1396 else
1397 s->failure = b || s->failure;
1398
1399 } else if (streq(key, "n-accepted")) {
1400 unsigned k;
1401
e364ad06 1402 if (safe_atou(value, &k) < 0)
a16e1123
LP		 1403 log_debug("Failed to parse n-accepted value %s", value);
1404 else
1405 s->n_accepted += k;
1406 } else if (streq(key, "control-pid")) {
5925dd3c 1407 pid_t pid;
a16e1123 1408
e364ad06 1409 if (parse_pid(value, &pid) < 0)
a16e1123
LP		 1410 log_debug("Failed to parse control-pid value %s", value);
1411 else
5925dd3c 1412 s->control_pid = pid;
a16e1123
LP		 1413 } else if (streq(key, "control-command")) {
1414 SocketExecCommand id;
1415
1416 if ((id = socket_exec_command_from_string(value)) < 0)
1417 log_debug("Failed to parse exec-command value %s", value);
1418 else {
1419 s->control_command_id = id;
1420 s->control_command = s->exec_command[id];
1421 }
1422 } else if (streq(key, "fifo")) {
1423 int fd, skip = 0;
1424 SocketPort *p;
1425
1426 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1427 log_debug("Failed to parse fifo value %s", value);
1428 else {
1429
1430 LIST_FOREACH(port, p, s->ports)
1431 if (streq(p->path, value+skip))
1432 break;
1433
1434 if (p) {
1435 if (p->fd >= 0)
1436 close_nointr_nofail(p->fd);
1437 p->fd = fdset_remove(fds, fd);
1438 }
1439 }
1440
1441 } else if (streq(key, "socket")) {
27ca8d7a 1442 int fd, type, skip = 0;
a16e1123
LP		 1443 SocketPort *p;
1444
27ca8d7a 1445 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
a16e1123
LP		 1446 log_debug("Failed to parse socket value %s", value);
1447 else {
1448
1449 LIST_FOREACH(port, p, s->ports)
27ca8d7a 1450 if (socket_address_is(&p->address, value+skip, type))
a16e1123
LP		 1451 break;
1452
1453 if (p) {
1454 if (p->fd >= 0)
1455 close_nointr_nofail(p->fd);
1456 p->fd = fdset_remove(fds, fd);
1457 }
1458 }
1459
1460 } else
1461 log_debug("Unknown serialization key '%s'", key);
1462
1463 return 0;
1464}
1465
87f0e418
LP		 1466static UnitActiveState socket_active_state(Unit *u) {
1467 assert(u);
5cb5a6ff 1468
acbb0225 1469 return state_translation_table[SOCKET(u)->state];
5cb5a6ff
LP		 1470}
1471
10a94420
LP		 1472static const char *socket_sub_state_to_string(Unit *u) {
1473 assert(u);
1474
a16e1123 1475 return socket_state_to_string(SOCKET(u)->state);
10a94420
LP		 1476}
1477
6cf6bbc2
LP		 1478static bool socket_check_gc(Unit *u) {
1479 Socket *s = SOCKET(u);
1480
1481 assert(u);
1482
1483 return s->n_connections > 0;
1484}
1485
acbb0225 1486static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
87f0e418 1487 Socket *s = SOCKET(u);
4f2d528d 1488 int cfd = -1;
9152c765 1489
034c6ed7 1490 assert(s);
8d567588 1491 assert(fd >= 0);
9152c765 1492
871d7de4
LP		 1493 if (s->state != SOCKET_LISTENING)
1494 return;
1495
9e2f7c11 1496 log_debug("Incoming traffic on %s", u->meta.id);
9152c765 1497
4f2d528d
LP		 1498 if (events != EPOLLIN) {
1499 log_error("Got invalid poll event on socket.");
8d567588 1500 goto fail;
4f2d528d
LP		 1501 }
1502
cabab516 1503 if (w->socket_accept) {
4f2d528d
LP		 1504 for (;;) {
1505
1506 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1507
1508 if (errno == EINTR)
1509 continue;
1510
1511 log_error("Failed to accept socket: %m");
8d567588 1512 goto fail;
4f2d528d
LP		 1513 }
1514
1515 break;
1516 }
4fd5948e
LP		 1517
1518 socket_apply_socket_options(s, cfd);
4f2d528d 1519 }
9152c765 1520
4f2d528d 1521 socket_enter_running(s, cfd);
8d567588
LP		 1522 return;
1523
1524fail:
1525 socket_enter_stop_pre(s, false);
9152c765
LP		 1526}
1527
87f0e418
LP		 1528static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1529 Socket *s = SOCKET(u);
034c6ed7 1530 bool success;
5cb5a6ff
LP		 1531
1532 assert(s);
034c6ed7 1533 assert(pid >= 0);
5cb5a6ff 1534
8c47c732
LP		 1535 if (pid != s->control_pid)
1536 return;
542563ba 1537
034c6ed7
LP		 1538 s->control_pid = 0;
1539
8c47c732 1540 success = is_clean_exit(code, status);
8c47c732 1541
b708e7ce 1542 if (s->control_command) {
b58b4116 1543 exec_status_exit(&s->control_command->exec_status, pid, code, status);
a16e1123 1544
b708e7ce
LP		 1545 if (s->control_command->ignore)
1546 success = true;
1547 }
1548
92abbefb
LP		 1549 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1550 "%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
b708e7ce 1551 s->failure = s->failure || !success;
034c6ed7 1552
a16e1123
LP		 1553 if (s->control_command && s->control_command->command_next && success) {
1554 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
034c6ed7 1555 socket_run_next(s, success);
acbb0225 1556 } else {
a16e1123
LP		 1557 s->control_command = NULL;
1558 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1559
034c6ed7
LP		 1560 /* No further commands for this step, so let's figure
1561 * out what to do next */
5cb5a6ff 1562
a16e1123 1563 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
acbb0225 1564
034c6ed7
LP		 1565 switch (s->state) {
1566
1567 case SOCKET_START_PRE:
1568 if (success)
acbb0225 1569 socket_enter_start_post(s);
034c6ed7 1570 else
80876c20 1571 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
034c6ed7
LP		 1572 break;
1573
1574 case SOCKET_START_POST:
1575 if (success)
e9af15c3 1576 socket_enter_listening(s);
034c6ed7
LP		 1577 else
1578 socket_enter_stop_pre(s, false);
1579 break;
1580
1581 case SOCKET_STOP_PRE:
1582 case SOCKET_STOP_PRE_SIGTERM:
1583 case SOCKET_STOP_PRE_SIGKILL:
1584 socket_enter_stop_post(s, success);
1585 break;
1586
1587 case SOCKET_STOP_POST:
80876c20
LP		 1588 case SOCKET_FINAL_SIGTERM:
1589 case SOCKET_FINAL_SIGKILL:
034c6ed7
LP		 1590 socket_enter_dead(s, success);
1591 break;
1592
1593 default:
1594 assert_not_reached("Uh, control process died at wrong time.");
1595 }
1596 }
1597}
5cb5a6ff 1598
acbb0225 1599static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
87f0e418 1600 Socket *s = SOCKET(u);
5cb5a6ff 1601
034c6ed7
LP		 1602 assert(s);
1603 assert(elapsed == 1);
acbb0225 1604 assert(w == &s->timer_watch);
034c6ed7
LP		 1605
1606 switch (s->state) {
1607
1608 case SOCKET_START_PRE:
9e2f7c11 1609 log_warning("%s starting timed out. Terminating.", u->meta.id);
80876c20
LP		 1610 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1611
034c6ed7 1612 case SOCKET_START_POST:
9e2f7c11 1613 log_warning("%s starting timed out. Stopping.", u->meta.id);
034c6ed7
LP		 1614 socket_enter_stop_pre(s, false);
1615 break;
1616
1617 case SOCKET_STOP_PRE:
9e2f7c11 1618 log_warning("%s stopping timed out. Terminating.", u->meta.id);
034c6ed7
LP		 1619 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1620 break;
1621
1622 case SOCKET_STOP_PRE_SIGTERM:
9e2f7c11 1623 log_warning("%s stopping timed out. Killing.", u->meta.id);
034c6ed7
LP		 1624 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1625 break;
1626
1627 case SOCKET_STOP_PRE_SIGKILL:
9e2f7c11 1628 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
034c6ed7
LP		 1629 socket_enter_stop_post(s, false);
1630 break;
1631
1632 case SOCKET_STOP_POST:
9e2f7c11 1633 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
80876c20 1634 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
034c6ed7
LP		 1635 break;
1636
80876c20 1637 case SOCKET_FINAL_SIGTERM:
9e2f7c11 1638 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
80876c20 1639 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
034c6ed7
LP		 1640 break;
1641
80876c20 1642 case SOCKET_FINAL_SIGKILL:
18c78fb1 1643 log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id);
034c6ed7
LP		 1644 socket_enter_dead(s, false);
1645 break;
1646
1647 default:
1648 assert_not_reached("Timeout at wrong time.");
1649 }
5cb5a6ff
LP		 1650}
1651
44d8db9e
LP		 1652int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1653 int *rfds;
1654 unsigned rn_fds, k;
1655 SocketPort *p;
1656
1657 assert(s);
1658 assert(fds);
1659 assert(n_fds);
1660
1661 /* Called from the service code for requesting our fds */
1662
1663 rn_fds = 0;
1664 LIST_FOREACH(port, p, s->ports)
1665 if (p->fd >= 0)
1666 rn_fds++;
1667
e364ad06 1668 if (!(rfds = new(int, rn_fds)))
44d8db9e
LP		 1669 return -ENOMEM;
1670
1671 k = 0;
1672 LIST_FOREACH(port, p, s->ports)
1673 if (p->fd >= 0)
1674 rfds[k++] = p->fd;
1675
1676 assert(k == rn_fds);
1677
1678 *fds = rfds;
1679 *n_fds = rn_fds;
1680
1681 return 0;
1682}
1683
ceee3d82
LP		 1684void socket_notify_service_dead(Socket *s) {
1685 assert(s);
1686
6cf6bbc2
LP		 1687 /* The service is dead. Dang!
1688 *
1689 * This is strictly for one-instance-for-all-connections
1690 * services. */
ceee3d82
LP		 1691
1692 if (s->state == SOCKET_RUNNING) {
9e2f7c11 1693 log_debug("%s got notified about service death.", s->meta.id);
ceee3d82
LP		 1694 socket_enter_listening(s);
1695 }
1696}
1697
6cf6bbc2
LP		 1698void socket_connection_unref(Socket *s) {
1699 assert(s);
1700
1701 /* The service is dead. Yay!
1702 *
1703 * This is strictly for one-onstance-per-connection
1704 * services. */
1705
1706 assert(s->n_connections > 0);
1707 s->n_connections--;
1708
1709 log_debug("%s: One connection closed, %u left.", s->meta.id, s->n_connections);
1710}
1711
5632e374
LP		 1712static void socket_reset_maintenance(Unit *u) {
1713 Socket *s = SOCKET(u);
1714
1715 assert(s);
1716
1717 if (s->state == SOCKET_MAINTENANCE)
1718 socket_set_state(s, SOCKET_DEAD);
1719
1720 s->failure = false;
1721}
1722
a16e1123
LP		 1723static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1724 [SOCKET_DEAD] = "dead",
1725 [SOCKET_START_PRE] = "start-pre",
1726 [SOCKET_START_POST] = "start-post",
1727 [SOCKET_LISTENING] = "listening",
1728 [SOCKET_RUNNING] = "running",
1729 [SOCKET_STOP_PRE] = "stop-pre",
1730 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1731 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1732 [SOCKET_STOP_POST] = "stop-post",
1733 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1734 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
18c78fb1 1735 [SOCKET_MAINTENANCE] = "maintenance"
a16e1123
LP		 1736};
1737
1738DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1739
1740static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1741 [SOCKET_EXEC_START_PRE] = "StartPre",
1742 [SOCKET_EXEC_START_POST] = "StartPost",
1743 [SOCKET_EXEC_STOP_PRE] = "StopPre",
1744 [SOCKET_EXEC_STOP_POST] = "StopPost"
1745};
1746
1747DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1748
87f0e418 1749const UnitVTable socket_vtable = {
5cb5a6ff
LP		 1750 .suffix = ".socket",
1751
034c6ed7
LP		 1752 .init = socket_init,
1753 .done = socket_done,
a16e1123
LP		 1754 .load = socket_load,
1755
1756 .coldplug = socket_coldplug,
034c6ed7 1757
5cb5a6ff
LP		 1758 .dump = socket_dump,
1759
542563ba
LP		 1760 .start = socket_start,
1761 .stop = socket_stop,
5cb5a6ff 1762
a16e1123
LP		 1763 .serialize = socket_serialize,
1764 .deserialize_item = socket_deserialize_item,
1765
5cb5a6ff 1766 .active_state = socket_active_state,
10a94420 1767 .sub_state_to_string = socket_sub_state_to_string,
5cb5a6ff 1768
6cf6bbc2
LP		 1769 .check_gc = socket_check_gc,
1770
9152c765 1771 .fd_event = socket_fd_event,
034c6ed7 1772 .sigchld_event = socket_sigchld_event,
4139c1b2
LP		 1773 .timer_event = socket_timer_event,
1774
5632e374
LP		 1775 .reset_maintenance = socket_reset_maintenance,
1776
4139c1b2 1777 .bus_message_handler = bus_socket_message_handler
5cb5a6ff 1778};
Unnamed repository; edit this file 'description' to name the repository.