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[thirdparty/systemd.git] / src / core / 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>
916abb21 30#include <mqueue.h>
83c60c9f 31
87f0e418 32#include "unit.h"
5cb5a6ff 33#include "socket.h"
cebf8b20 34#include "netinet/tcp.h"
83c60c9f 35#include "log.h"
23a177ef
LP		 36#include "load-dropin.h"
37#include "load-fragment.h"
9e2f7c11 38#include "strv.h"
49e942b2 39#include "mkdir.h"
4f2d528d 40#include "unit-name.h"
4139c1b2 41#include "dbus-socket.h"
4fd5948e 42#include "missing.h"
a40eb732 43#include "special.h"
398ef8ba 44#include "bus-errors.h"
e51bc1a2 45#include "label.h"
9a57c629 46#include "exit-status.h"
f6a6225e 47#include "def.h"
83c60c9f 48
acbb0225 49static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
87f0e418
LP		 50 [SOCKET_DEAD] = UNIT_INACTIVE,
51 [SOCKET_START_PRE] = UNIT_ACTIVATING,
52 [SOCKET_START_POST] = UNIT_ACTIVATING,
53 [SOCKET_LISTENING] = UNIT_ACTIVE,
54 [SOCKET_RUNNING] = UNIT_ACTIVE,
55 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
56 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
57 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
58 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
80876c20
LP		 59 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
60 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
fdf20a31 61 [SOCKET_FAILED] = UNIT_FAILED
83c60c9f 62};
5cb5a6ff 63
a16e1123
LP		 64static void socket_init(Unit *u) {
65 Socket *s = SOCKET(u);
66
67 assert(u);
ac155bb8 68 assert(u->load_state == UNIT_STUB);
a16e1123 69
a16e1123
LP		 70 s->backlog = SOMAXCONN;
71 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
72 s->directory_mode = 0755;
9131f660 73 s->socket_mode = 0666;
a16e1123 74
6cf6bbc2
LP		 75 s->max_connections = 64;
76
4fd5948e 77 s->priority = -1;
4fd5948e
LP		 78 s->ip_tos = -1;
79 s->ip_ttl = -1;
4fd5948e 80 s->mark = -1;
4fd5948e 81
a16e1123 82 exec_context_init(&s->exec_context);
ac155bb8
MS		 83 s->exec_context.std_output = u->manager->default_std_output;
84 s->exec_context.std_error = u->manager->default_std_error;
a16e1123
LP		 85
86 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
87}
acbb0225 88
5e94833f
LP		 89static void socket_unwatch_control_pid(Socket *s) {
90 assert(s);
91
92 if (s->control_pid <= 0)
93 return;
94
95 unit_unwatch_pid(UNIT(s), s->control_pid);
96 s->control_pid = 0;
97}
98
87f0e418
LP		 99static void socket_done(Unit *u) {
100 Socket *s = SOCKET(u);
034c6ed7
LP		 101 SocketPort *p;
102
103 assert(s);
104
105 while ((p = s->ports)) {
106 LIST_REMOVE(SocketPort, port, s->ports, p);
107
a16e1123
LP		 108 if (p->fd >= 0) {
109 unit_unwatch_fd(UNIT(s), &p->fd_watch);
110 close_nointr_nofail(p->fd);
111 }
112
034c6ed7
LP		 113 free(p->path);
114 free(p);
115 }
116
117 exec_context_done(&s->exec_context);
e537352b 118 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
034c6ed7
LP		 119 s->control_command = NULL;
120
5e94833f 121 socket_unwatch_control_pid(s);
034c6ed7 122
57020a3a 123 unit_ref_unset(&s->service);
034c6ed7 124
cebf8b20
TT		 125 free(s->tcp_congestion);
126 s->tcp_congestion = NULL;
127
acbb0225 128 free(s->bind_to_device);
e537352b 129 s->bind_to_device = NULL;
acbb0225
LP		 130
131 unit_unwatch_timer(u, &s->timer_watch);
5cb5a6ff
LP		 132}
133
b15bdda8
LP		 134static int socket_instantiate_service(Socket *s) {
135 char *prefix, *name;
136 int r;
137 Unit *u;
138
139 assert(s);
140
141 /* This fills in s->service if it isn't filled in yet. For
142 * Accept=yes sockets we create the next connection service
143 * here. For Accept=no this is mostly a NOP since the service
144 * is figured out at load time anyway. */
145
57020a3a 146 if (UNIT_DEREF(s->service))
b15bdda8
LP		 147 return 0;
148
149 assert(s->accept);
150
1124fe6f 151 if (!(prefix = unit_name_to_prefix(UNIT(s)->id)))
b15bdda8
LP		 152 return -ENOMEM;
153
154 r = asprintf(&name, "%s@%u.service", prefix, s->n_accepted);
155 free(prefix);
156
157 if (r < 0)
158 return -ENOMEM;
159
1124fe6f 160 r = manager_load_unit(UNIT(s)->manager, name, NULL, NULL, &u);
b15bdda8
LP		 161 free(name);
162
163 if (r < 0)
164 return r;
165
7b4bf06b
LP		 166#ifdef HAVE_SYSV_COMPAT
167 if (SERVICE(u)->sysv_path) {
168 log_error("Using SysV services for socket activation is not supported. Refusing.");
169 return -ENOENT;
170 }
171#endif
172
ac155bb8 173 u->no_gc = true;
57020a3a
LP		 174 unit_ref_set(&s->service, u);
175
176 return unit_add_two_dependencies(UNIT(s), UNIT_BEFORE, UNIT_TRIGGERS, u, false);
b15bdda8
LP		 177}
178
4f2d528d
LP		 179static bool have_non_accept_socket(Socket *s) {
180 SocketPort *p;
181
182 assert(s);
183
184 if (!s->accept)
185 return true;
186
dd5ad9d4
LP		 187 LIST_FOREACH(port, p, s->ports) {
188
189 if (p->type != SOCKET_SOCKET)
190 return true;
191
4f2d528d
LP		 192 if (!socket_address_can_accept(&p->address))
193 return true;
dd5ad9d4 194 }
4f2d528d
LP		 195
196 return false;
197}
198
199static int socket_verify(Socket *s) {
200 assert(s);
201
1124fe6f 202 if (UNIT(s)->load_state != UNIT_LOADED)
4f2d528d
LP		 203 return 0;
204
205 if (!s->ports) {
1124fe6f 206 log_error("%s lacks Listen setting. Refusing.", UNIT(s)->id);
4f2d528d
LP		 207 return -EINVAL;
208 }
209
0009d2a6 210 if (s->accept && have_non_accept_socket(s)) {
1124fe6f 211 log_error("%s configured for accepting sockets, but sockets are non-accepting. Refusing.", UNIT(s)->id);
0009d2a6
LP		 212 return -EINVAL;
213 }
214
6cf6bbc2 215 if (s->accept && s->max_connections <= 0) {
1124fe6f 216 log_error("%s's MaxConnection setting too small. Refusing.", UNIT(s)->id);
4d0e5dbd
LP		 217 return -EINVAL;
218 }
219
57020a3a 220 if (s->accept && UNIT_DEREF(s->service)) {
1124fe6f 221 log_error("Explicit service configuration for accepting sockets not supported on %s. Refusing.", UNIT(s)->id);
d9ff321a
LP		 222 return -EINVAL;
223 }
224
2e22afe9 225 if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
1124fe6f 226 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id);
6cf6bbc2
LP		 227 return -EINVAL;
228 }
229
4f2d528d
LP		 230 return 0;
231}
232
6e2ef85b
LP		 233static bool socket_needs_mount(Socket *s, const char *prefix) {
234 SocketPort *p;
235
236 assert(s);
237
238 LIST_FOREACH(port, p, s->ports) {
239
240 if (p->type == SOCKET_SOCKET) {
241 if (socket_address_needs_mount(&p->address, prefix))
242 return true;
916abb21 243 } else if (p->type == SOCKET_FIFO || p->type == SOCKET_SPECIAL) {
6e2ef85b
LP		 244 if (path_startswith(p->path, prefix))
245 return true;
246 }
247 }
248
249 return false;
250}
251
252int socket_add_one_mount_link(Socket *s, Mount *m) {
253 int r;
254
255 assert(s);
256 assert(m);
257
1124fe6f
MS		 258 if (UNIT(s)->load_state != UNIT_LOADED ||
259 UNIT(m)->load_state != UNIT_LOADED)
6e2ef85b
LP		 260 return 0;
261
262 if (!socket_needs_mount(s, m->where))
263 return 0;
264
2c966c03 265 if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0)
6e2ef85b
LP		 266 return r;
267
268 return 0;
269}
270
271static int socket_add_mount_links(Socket *s) {
ac155bb8 272 Unit *other;
6e2ef85b
LP		 273 int r;
274
275 assert(s);
276
1124fe6f 277 LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_MOUNT])
595ed347 278 if ((r = socket_add_one_mount_link(s, MOUNT(other))) < 0)
6e2ef85b
LP		 279 return r;
280
281 return 0;
282}
283
284static int socket_add_device_link(Socket *s) {
285 char *t;
286 int r;
287
288 assert(s);
289
290 if (!s->bind_to_device)
291 return 0;
292
293 if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
294 return -ENOMEM;
295
296 r = unit_add_node_link(UNIT(s), t, false);
297 free(t);
298
299 return r;
300}
301
a40eb732
LP		 302static int socket_add_default_dependencies(Socket *s) {
303 int r;
304 assert(s);
305
1124fe6f 306 if (UNIT(s)->manager->running_as == MANAGER_SYSTEM) {
2a77d31d
LP		 307 if ((r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
308 return r;
309
a40eb732
LP		 310 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
311 return r;
2a77d31d 312 }
a40eb732 313
ead8e478 314 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
a40eb732
LP		 315}
316
4cfc6dbe
LP		 317static bool socket_has_exec(Socket *s) {
318 unsigned i;
319 assert(s);
320
321 for (i = 0; i < _SOCKET_EXEC_COMMAND_MAX; i++)
322 if (s->exec_command[i])
323 return true;
324
325 return false;
326}
327
e537352b
LP		 328static int socket_load(Unit *u) {
329 Socket *s = SOCKET(u);
330 int r;
44d8db9e 331
e537352b 332 assert(u);
ac155bb8 333 assert(u->load_state == UNIT_STUB);
44d8db9e 334
e537352b 335 if ((r = unit_load_fragment_and_dropin(u)) < 0)
23a177ef 336 return r;
44d8db9e 337
23a177ef 338 /* This is a new unit? Then let's add in some extras */
ac155bb8 339 if (u->load_state == UNIT_LOADED) {
44d8db9e 340
4f2d528d 341 if (have_non_accept_socket(s)) {
d9ff321a 342
57020a3a
LP		 343 if (!UNIT_DEREF(s->service)) {
344 Unit *x;
345
346 r = unit_load_related_unit(u, ".service", &x);
347 if (r < 0)
d9ff321a 348 return r;
23a177ef 349
57020a3a
LP		 350 unit_ref_set(&s->service, x);
351 }
352
353 r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true);
354 if (r < 0)
4f2d528d
LP		 355 return r;
356 }
44d8db9e 357
6e2ef85b
LP		 358 if ((r = socket_add_mount_links(s)) < 0)
359 return r;
360
361 if ((r = socket_add_device_link(s)) < 0)
362 return r;
363
4cfc6dbe
LP		 364 if (socket_has_exec(s))
365 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
366 return r;
23a177ef 367
d686d8a9 368 if ((r = unit_add_default_cgroups(u)) < 0)
23a177ef 369 return r;
a40eb732 370
1124fe6f 371 if (UNIT(s)->default_dependencies)
a40eb732
LP		 372 if ((r = socket_add_default_dependencies(s)) < 0)
373 return r;
23a177ef
LP		 374 }
375
4f2d528d 376 return socket_verify(s);
44d8db9e
LP		 377}
378
7a22745a
LP		 379static const char* listen_lookup(int family, int type) {
380
381 if (family == AF_NETLINK)
382 return "ListenNetlink";
542563ba
LP		 383
384 if (type == SOCK_STREAM)
385 return "ListenStream";
386 else if (type == SOCK_DGRAM)
387 return "ListenDatagram";
388 else if (type == SOCK_SEQPACKET)
389 return "ListenSequentialPacket";
390
034c6ed7 391 assert_not_reached("Unknown socket type");
542563ba
LP		 392 return NULL;
393}
394
87f0e418 395static void socket_dump(Unit *u, FILE *f, const char *prefix) {
5cb5a6ff 396
5cb5a6ff 397 SocketExecCommand c;
87f0e418 398 Socket *s = SOCKET(u);
542563ba 399 SocketPort *p;
82ba9f08
LP		 400 const char *prefix2;
401 char *p2;
5cb5a6ff
LP		 402
403 assert(s);
fa068367 404 assert(f);
5cb5a6ff 405
82ba9f08
LP		 406 p2 = strappend(prefix, "\t");
407 prefix2 = p2 ? p2 : prefix;
c43d20a0 408
5cb5a6ff
LP		 409 fprintf(f,
410 "%sSocket State: %s\n"
81a5c6d0 411 "%sResult: %s\n"
542563ba 412 "%sBindIPv6Only: %s\n"
b5a0699f
LP		 413 "%sBacklog: %u\n"
414 "%sSocketMode: %04o\n"
4fd5948e
LP		 415 "%sDirectoryMode: %04o\n"
416 "%sKeepAlive: %s\n"
cebf8b20 417 "%sFreeBind: %s\n"
6b6d2dee 418 "%sTransparent: %s\n"
ec6370a2 419 "%sBroadcast: %s\n"
ede3deb4 420 "%sPassCredentials: %s\n"
54ecda32 421 "%sPassSecurity: %s\n"
cebf8b20 422 "%sTCPCongestion: %s\n",
a16e1123 423 prefix, socket_state_to_string(s->state),
81a5c6d0 424 prefix, socket_result_to_string(s->result),
c0120d99 425 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
b5a0699f
LP		 426 prefix, s->backlog,
427 prefix, s->socket_mode,
4fd5948e
LP		 428 prefix, s->directory_mode,
429 prefix, yes_no(s->keep_alive),
cebf8b20 430 prefix, yes_no(s->free_bind),
6b6d2dee 431 prefix, yes_no(s->transparent),
ec6370a2 432 prefix, yes_no(s->broadcast),
d68af586 433 prefix, yes_no(s->pass_cred),
54ecda32 434 prefix, yes_no(s->pass_sec),
83a95334 435 prefix, strna(s->tcp_congestion));
542563ba 436
70123e68
LP		 437 if (s->control_pid > 0)
438 fprintf(f,
bb00e604
LP		 439 "%sControl PID: %lu\n",
440 prefix, (unsigned long) s->control_pid);
70123e68 441
acbb0225
LP		 442 if (s->bind_to_device)
443 fprintf(f,
444 "%sBindToDevice: %s\n",
445 prefix, s->bind_to_device);
446
4f2d528d
LP		 447 if (s->accept)
448 fprintf(f,
6cf6bbc2
LP		 449 "%sAccepted: %u\n"
450 "%sNConnections: %u\n"
451 "%sMaxConnections: %u\n",
452 prefix, s->n_accepted,
453 prefix, s->n_connections,
454 prefix, s->max_connections);
4f2d528d 455
4fd5948e
LP		 456 if (s->priority >= 0)
457 fprintf(f,
458 "%sPriority: %i\n",
459 prefix, s->priority);
460
461 if (s->receive_buffer > 0)
462 fprintf(f,
463 "%sReceiveBuffer: %zu\n",
464 prefix, s->receive_buffer);
465
466 if (s->send_buffer > 0)
467 fprintf(f,
468 "%sSendBuffer: %zu\n",
469 prefix, s->send_buffer);
470
471 if (s->ip_tos >= 0)
472 fprintf(f,
473 "%sIPTOS: %i\n",
474 prefix, s->ip_tos);
475
476 if (s->ip_ttl >= 0)
477 fprintf(f,
478 "%sIPTTL: %i\n",
479 prefix, s->ip_ttl);
480
481 if (s->pipe_size > 0)
482 fprintf(f,
483 "%sPipeSize: %zu\n",
484 prefix, s->pipe_size);
485
486 if (s->mark >= 0)
487 fprintf(f,
488 "%sMark: %i\n",
489 prefix, s->mark);
490
916abb21
LP		 491 if (s->mq_maxmsg > 0)
492 fprintf(f,
493 "%sMessageQueueMaxMessages: %li\n",
494 prefix, s->mq_maxmsg);
495
496 if (s->mq_msgsize > 0)
497 fprintf(f,
498 "%sMessageQueueMessageSize: %li\n",
499 prefix, s->mq_msgsize);
500
034c6ed7 501 LIST_FOREACH(port, p, s->ports) {
5cb5a6ff 502
542563ba
LP		 503 if (p->type == SOCKET_SOCKET) {
504 const char *t;
505 int r;
e364ad06 506 char *k = NULL;
542563ba
LP		 507
508 if ((r = socket_address_print(&p->address, &k)) < 0)
509 t = strerror(-r);
510 else
511 t = k;
512
7a22745a 513 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t);
542563ba 514 free(k);
b0a3f2bc
LP		 515 } else if (p->type == SOCKET_SPECIAL)
516 fprintf(f, "%sListenSpecial: %s\n", prefix, p->path);
916abb21
LP		 517 else if (p->type == SOCKET_MQUEUE)
518 fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path);
b0a3f2bc 519 else
542563ba
LP		 520 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
521 }
5cb5a6ff
LP		 522
523 exec_context_dump(&s->exec_context, f, prefix);
524
e537352b 525 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
c43d20a0
LP		 526 if (!s->exec_command[c])
527 continue;
5cb5a6ff 528
40d50879 529 fprintf(f, "%s-> %s:\n",
a16e1123 530 prefix, socket_exec_command_to_string(c));
c43d20a0
LP		 531
532 exec_command_dump_list(s->exec_command[c], f, prefix2);
5cb5a6ff 533 }
c43d20a0 534
82ba9f08 535 free(p2);
5cb5a6ff
LP		 536}
537
4f2d528d
LP		 538static int instance_from_socket(int fd, unsigned nr, char **instance) {
539 socklen_t l;
540 char *r;
541 union {
542 struct sockaddr sa;
543 struct sockaddr_un un;
544 struct sockaddr_in in;
545 struct sockaddr_in6 in6;
546 struct sockaddr_storage storage;
547 } local, remote;
548
549 assert(fd >= 0);
550 assert(instance);
551
552 l = sizeof(local);
553 if (getsockname(fd, &local.sa, &l) < 0)
554 return -errno;
555
556 l = sizeof(remote);
557 if (getpeername(fd, &remote.sa, &l) < 0)
558 return -errno;
559
560 switch (local.sa.sa_family) {
561
562 case AF_INET: {
563 uint32_t
564 a = ntohl(local.in.sin_addr.s_addr),
565 b = ntohl(remote.in.sin_addr.s_addr);
566
567 if (asprintf(&r,
77b088c2
LP		 568 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
569 nr,
4f2d528d
LP		 570 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
571 ntohs(local.in.sin_port),
572 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
573 ntohs(remote.in.sin_port)) < 0)
574 return -ENOMEM;
575
576 break;
577 }
578
579 case AF_INET6: {
2b061f5a
LP		 580 static const char ipv4_prefix[] = {
581 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
582 };
583
584 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
585 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
586 const uint8_t
587 *a = local.in6.sin6_addr.s6_addr+12,
588 *b = remote.in6.sin6_addr.s6_addr+12;
589
590 if (asprintf(&r,
77b088c2
LP		 591 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
592 nr,
2b061f5a
LP		 593 a[0], a[1], a[2], a[3],
594 ntohs(local.in6.sin6_port),
595 b[0], b[1], b[2], b[3],
596 ntohs(remote.in6.sin6_port)) < 0)
597 return -ENOMEM;
598 } else {
599 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
600
601 if (asprintf(&r,
77b088c2
LP		 602 "%u-%s:%u-%s:%u",
603 nr,
2b061f5a
LP		 604 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
605 ntohs(local.in6.sin6_port),
606 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
607 ntohs(remote.in6.sin6_port)) < 0)
608 return -ENOMEM;
609 }
4f2d528d
LP		 610
611 break;
612 }
613
614 case AF_UNIX: {
615 struct ucred ucred;
616
617 l = sizeof(ucred);
618 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
619 return -errno;
620
621 if (asprintf(&r,
bb00e604 622 "%u-%lu-%lu",
4f2d528d 623 nr,
bb00e604
LP		 624 (unsigned long) ucred.pid,
625 (unsigned long) ucred.uid) < 0)
4f2d528d
LP		 626 return -ENOMEM;
627
628 break;
629 }
630
631 default:
632 assert_not_reached("Unhandled socket type.");
633 }
634
635 *instance = r;
636 return 0;
637}
638
034c6ed7 639static void socket_close_fds(Socket *s) {
83c60c9f
LP		 640 SocketPort *p;
641
642 assert(s);
643
034c6ed7 644 LIST_FOREACH(port, p, s->ports) {
83c60c9f
LP		 645 if (p->fd < 0)
646 continue;
647
acbb0225 648 unit_unwatch_fd(UNIT(s), &p->fd_watch);
a16e1123
LP		 649 close_nointr_nofail(p->fd);
650
651 /* One little note: we should never delete any sockets
652 * in the file system here! After all some other
653 * process we spawned might still have a reference of
654 * this fd and wants to continue to use it. Therefore
655 * we delete sockets in the file system before we
656 * create a new one, not after we stopped using
657 * one! */
9152c765 658
83c60c9f
LP		 659 p->fd = -1;
660 }
661}
662
4fd5948e
LP		 663static void socket_apply_socket_options(Socket *s, int fd) {
664 assert(s);
665 assert(fd >= 0);
666
667 if (s->keep_alive) {
668 int b = s->keep_alive;
669 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
670 log_warning("SO_KEEPALIVE failed: %m");
671 }
672
ec6370a2
LP		 673 if (s->broadcast) {
674 int one = 1;
675 if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0)
676 log_warning("SO_BROADCAST failed: %m");
677 }
678
d68af586
MS		 679 if (s->pass_cred) {
680 int one = 1;
681 if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0)
682 log_warning("SO_PASSCRED failed: %m");
683 }
684
54ecda32
LP		 685 if (s->pass_sec) {
686 int one = 1;
687 if (setsockopt(fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one)) < 0)
688 log_warning("SO_PASSSEC failed: %m");
689 }
690
4fd5948e
LP		 691 if (s->priority >= 0)
692 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
693 log_warning("SO_PRIORITY failed: %m");
694
695 if (s->receive_buffer > 0) {
696 int value = (int) s->receive_buffer;
7d9eaa84
LP		 697
698 /* We first try with SO_RCVBUFFORCE, in case we have the perms for that */
699
b8cef44e 700 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0)
7d9eaa84
LP		 701 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
702 log_warning("SO_RCVBUF failed: %m");
4fd5948e
LP		 703 }
704
705 if (s->send_buffer > 0) {
706 int value = (int) s->send_buffer;
b8cef44e 707 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0)
7d9eaa84
LP		 708 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
709 log_warning("SO_SNDBUF failed: %m");
4fd5948e
LP		 710 }
711
712 if (s->mark >= 0)
713 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
714 log_warning("SO_MARK failed: %m");
715
716 if (s->ip_tos >= 0)
717 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
718 log_warning("IP_TOS failed: %m");
719
46925ac5
LP		 720 if (s->ip_ttl >= 0) {
721 int r, x;
722
723 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
5bfcc1c6
FF		 724
725 if (socket_ipv6_is_supported())
726 x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
727 else {
728 x = -1;
729 errno = EAFNOSUPPORT;
730 }
46925ac5
LP		 731
732 if (r < 0 && x < 0)
733 log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
734 }
cebf8b20
TT		 735
736 if (s->tcp_congestion)
737 if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0)
738 log_warning("TCP_CONGESTION failed: %m");
4fd5948e
LP		 739}
740
b15bdda8 741static void socket_apply_fifo_options(Socket *s, int fd) {
4fd5948e
LP		 742 assert(s);
743 assert(fd >= 0);
744
745 if (s->pipe_size > 0)
746 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
747 log_warning("F_SETPIPE_SZ: %m");
748}
749
b15bdda8
LP		 750static int fifo_address_create(
751 const char *path,
752 mode_t directory_mode,
753 mode_t socket_mode,
b15bdda8
LP		 754 int *_fd) {
755
7a58bfa4 756 int fd = -1, r = 0;
b15bdda8
LP		 757 struct stat st;
758 mode_t old_mask;
759
760 assert(path);
761 assert(_fd);
762
763 mkdir_parents(path, directory_mode);
764
c4e2ceae 765 if ((r = label_fifofile_set(path)) < 0)
56cf987f 766 goto fail;
b15bdda8
LP		 767
768 /* Enforce the right access mode for the fifo */
769 old_mask = umask(~ socket_mode);
770
771 /* Include the original umask in our mask */
772 umask(~socket_mode | old_mask);
773
774 r = mkfifo(path, socket_mode);
775 umask(old_mask);
776
94bc2731 777 if (r < 0 && errno != EEXIST) {
b15bdda8
LP		 778 r = -errno;
779 goto fail;
780 }
781
782 if ((fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
783 r = -errno;
784 goto fail;
785 }
786
56cf987f 787 label_file_clear();
7a58bfa4 788
b15bdda8
LP		 789 if (fstat(fd, &st) < 0) {
790 r = -errno;
791 goto fail;
792 }
793
794 if (!S_ISFIFO(st.st_mode) ||
de0200fc 795 (st.st_mode & 0777) != (socket_mode & ~old_mask) ||
b15bdda8
LP		 796 st.st_uid != getuid() ||
797 st.st_gid != getgid()) {
798
799 r = -EEXIST;
800 goto fail;
801 }
802
803 *_fd = fd;
804 return 0;
805
806fail:
56cf987f
DW		 807 label_file_clear();
808
b15bdda8
LP		 809 if (fd >= 0)
810 close_nointr_nofail(fd);
811
812 return r;
813}
814
b0a3f2bc
LP		 815static int special_address_create(
816 const char *path,
817 int *_fd) {
818
819 int fd = -1, r = 0;
820 struct stat st;
821
822 assert(path);
823 assert(_fd);
824
825 if ((fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
826 r = -errno;
827 goto fail;
828 }
829
830 if (fstat(fd, &st) < 0) {
831 r = -errno;
832 goto fail;
833 }
834
835 /* Check whether this is a /proc, /sys or /dev file or char device */
836 if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) {
837 r = -EEXIST;
838 goto fail;
839 }
840
841 *_fd = fd;
842 return 0;
843
844fail:
845 if (fd >= 0)
846 close_nointr_nofail(fd);
847
848 return r;
849}
850
916abb21
LP		 851static int mq_address_create(
852 const char *path,
853 mode_t mq_mode,
854 long maxmsg,
855 long msgsize,
856 int *_fd) {
857
858 int fd = -1, r = 0;
859 struct stat st;
860 mode_t old_mask;
861 struct mq_attr _attr, *attr = NULL;
862
863 assert(path);
864 assert(_fd);
865
866 if (maxmsg > 0 && msgsize > 0) {
867 zero(_attr);
868 _attr.mq_flags = O_NONBLOCK;
869 _attr.mq_maxmsg = maxmsg;
870 _attr.mq_msgsize = msgsize;
871 attr = &_attr;
872 }
873
874 /* Enforce the right access mode for the mq */
875 old_mask = umask(~ mq_mode);
876
877 /* Include the original umask in our mask */
878 umask(~mq_mode | old_mask);
879
880 fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr);
881 umask(old_mask);
882
8ea913b2 883 if (fd < 0) {
916abb21
LP		 884 r = -errno;
885 goto fail;
886 }
887
888 if (fstat(fd, &st) < 0) {
889 r = -errno;
890 goto fail;
891 }
892
893 if ((st.st_mode & 0777) != (mq_mode & ~old_mask) ||
894 st.st_uid != getuid() ||
895 st.st_gid != getgid()) {
896
897 r = -EEXIST;
898 goto fail;
899 }
900
901 *_fd = fd;
902 return 0;
903
904fail:
905 if (fd >= 0)
906 close_nointr_nofail(fd);
907
908 return r;
909}
910
034c6ed7 911static int socket_open_fds(Socket *s) {
83c60c9f
LP		 912 SocketPort *p;
913 int r;
56cf987f 914 char *label = NULL;
049f8642 915 bool know_label = false;
83c60c9f
LP		 916
917 assert(s);
918
034c6ed7 919 LIST_FOREACH(port, p, s->ports) {
83c60c9f 920
034c6ed7
LP		 921 if (p->fd >= 0)
922 continue;
83c60c9f
LP		 923
924 if (p->type == SOCKET_SOCKET) {
925
049f8642
LP		 926 if (!know_label) {
927
928 if ((r = socket_instantiate_service(s)) < 0)
929 return r;
930
57020a3a
LP		 931 if (UNIT_DEREF(s->service) &&
932 SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]) {
933 r = label_get_create_label_from_exe(SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]->path, &label);
189583d7
LP		 934
935 if (r < 0) {
a7444eda
LP		 936 if (r != -EPERM)
937 return r;
938 }
189583d7 939 }
049f8642
LP		 940
941 know_label = true;
942 }
943
b5a0699f
LP		 944 if ((r = socket_address_listen(
945 &p->address,
946 s->backlog,
947 s->bind_ipv6_only,
948 s->bind_to_device,
4fd5948e 949 s->free_bind,
6b6d2dee 950 s->transparent,
b5a0699f
LP		 951 s->directory_mode,
952 s->socket_mode,
56cf987f 953 label,
b5a0699f 954 &p->fd)) < 0)
83c60c9f
LP		 955 goto rollback;
956
4fd5948e
LP		 957 socket_apply_socket_options(s, p->fd);
958
b0a3f2bc
LP		 959 } else if (p->type == SOCKET_SPECIAL) {
960
961 if ((r = special_address_create(
962 p->path,
963 &p->fd)) < 0)
964 goto rollback;
965
b15bdda8 966 } else if (p->type == SOCKET_FIFO) {
83c60c9f 967
b15bdda8
LP		 968 if ((r = fifo_address_create(
969 p->path,
970 s->directory_mode,
971 s->socket_mode,
b15bdda8 972 &p->fd)) < 0)
83c60c9f 973 goto rollback;
83c60c9f 974
b15bdda8 975 socket_apply_fifo_options(s, p->fd);
916abb21 976 } else if (p->type == SOCKET_MQUEUE) {
83c60c9f 977
916abb21
LP		 978 if ((r = mq_address_create(
979 p->path,
980 s->socket_mode,
981 s->mq_maxmsg,
982 s->mq_msgsize,
983 &p->fd)) < 0)
984 goto rollback;
b15bdda8
LP		 985 } else
986 assert_not_reached("Unknown port type");
034c6ed7
LP		 987 }
988
56cf987f 989 label_free(label);
034c6ed7
LP		 990 return 0;
991
992rollback:
993 socket_close_fds(s);
56cf987f 994 label_free(label);
034c6ed7
LP		 995 return r;
996}
997
998static void socket_unwatch_fds(Socket *s) {
999 SocketPort *p;
9152c765 1000
034c6ed7
LP		 1001 assert(s);
1002
1003 LIST_FOREACH(port, p, s->ports) {
1004 if (p->fd < 0)
1005 continue;
1006
acbb0225 1007 unit_unwatch_fd(UNIT(s), &p->fd_watch);
83c60c9f 1008 }
034c6ed7
LP		 1009}
1010
1011static int socket_watch_fds(Socket *s) {
1012 SocketPort *p;
1013 int r;
1014
1015 assert(s);
83c60c9f 1016
034c6ed7
LP		 1017 LIST_FOREACH(port, p, s->ports) {
1018 if (p->fd < 0)
1019 continue;
1020
cabab516 1021 p->fd_watch.socket_accept =
4f2d528d 1022 s->accept &&
dd5ad9d4 1023 p->type == SOCKET_SOCKET &&
4f2d528d
LP		 1024 socket_address_can_accept(&p->address);
1025
f94ea366 1026 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
034c6ed7
LP		 1027 goto fail;
1028 }
83c60c9f 1029
542563ba 1030 return 0;
83c60c9f 1031
034c6ed7
LP		 1032fail:
1033 socket_unwatch_fds(s);
1034 return r;
1035}
1036
1037static void socket_set_state(Socket *s, SocketState state) {
1038 SocketState old_state;
1039 assert(s);
1040
1041 old_state = s->state;
1042 s->state = state;
1043
1044 if (state != SOCKET_START_PRE &&
1045 state != SOCKET_START_POST &&
1046 state != SOCKET_STOP_PRE &&
1047 state != SOCKET_STOP_PRE_SIGTERM &&
1048 state != SOCKET_STOP_PRE_SIGKILL &&
1049 state != SOCKET_STOP_POST &&
80876c20
LP		 1050 state != SOCKET_FINAL_SIGTERM &&
1051 state != SOCKET_FINAL_SIGKILL) {
acbb0225 1052 unit_unwatch_timer(UNIT(s), &s->timer_watch);
5e94833f 1053 socket_unwatch_control_pid(s);
034c6ed7 1054 s->control_command = NULL;
a16e1123 1055 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
e537352b 1056 }
034c6ed7 1057
a16e1123
LP		 1058 if (state != SOCKET_LISTENING)
1059 socket_unwatch_fds(s);
1060
034c6ed7
LP		 1061 if (state != SOCKET_START_POST &&
1062 state != SOCKET_LISTENING &&
1063 state != SOCKET_RUNNING &&
1064 state != SOCKET_STOP_PRE &&
1065 state != SOCKET_STOP_PRE_SIGTERM &&
1066 state != SOCKET_STOP_PRE_SIGKILL)
1067 socket_close_fds(s);
1068
e537352b 1069 if (state != old_state)
40d50879 1070 log_debug("%s changed %s -> %s",
1124fe6f 1071 UNIT(s)->id,
a16e1123
LP		 1072 socket_state_to_string(old_state),
1073 socket_state_to_string(state));
acbb0225 1074
e2f3b44c 1075 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
034c6ed7
LP		 1076}
1077
a16e1123
LP		 1078static int socket_coldplug(Unit *u) {
1079 Socket *s = SOCKET(u);
1080 int r;
1081
1082 assert(s);
1083 assert(s->state == SOCKET_DEAD);
1084
1085 if (s->deserialized_state != s->state) {
1086
1087 if (s->deserialized_state == SOCKET_START_PRE ||
1088 s->deserialized_state == SOCKET_START_POST ||
1089 s->deserialized_state == SOCKET_STOP_PRE ||
1090 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1091 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
1092 s->deserialized_state == SOCKET_STOP_POST ||
1093 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
1094 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
1095
1096 if (s->control_pid <= 0)
1097 return -EBADMSG;
1098
1099 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1100 return r;
1101
1102 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1103 return r;
1104 }
1105
1106 if (s->deserialized_state == SOCKET_START_POST ||
1107 s->deserialized_state == SOCKET_LISTENING ||
1108 s->deserialized_state == SOCKET_RUNNING ||
1109 s->deserialized_state == SOCKET_STOP_PRE ||
1110 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1111 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
1112 if ((r = socket_open_fds(s)) < 0)
1113 return r;
1114
1115 if (s->deserialized_state == SOCKET_LISTENING)
1116 if ((r = socket_watch_fds(s)) < 0)
1117 return r;
1118
1119 socket_set_state(s, s->deserialized_state);
1120 }
1121
1122 return 0;
1123}
1124
e537352b 1125static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
034c6ed7
LP		 1126 pid_t pid;
1127 int r;
9e2f7c11 1128 char **argv;
034c6ed7
LP		 1129
1130 assert(s);
1131 assert(c);
1132 assert(_pid);
1133
e537352b
LP		 1134 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1135 goto fail;
034c6ed7 1136
9e2f7c11
LP		 1137 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1138 r = -ENOMEM;
1139 goto fail;
1140 }
1141
1142 r = exec_spawn(c,
1143 argv,
1144 &s->exec_context,
1145 NULL, 0,
1124fe6f 1146 UNIT(s)->manager->environment,
9e2f7c11
LP		 1147 true,
1148 true,
1e3ad081 1149 true,
1124fe6f
MS		 1150 UNIT(s)->manager->confirm_spawn,
1151 UNIT(s)->cgroup_bondings,
1152 UNIT(s)->cgroup_attributes,
9e2f7c11
LP		 1153 &pid);
1154
1155 strv_free(argv);
1156 if (r < 0)
034c6ed7
LP		 1157 goto fail;
1158
87f0e418 1159 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
034c6ed7
LP		 1160 /* FIXME: we need to do something here */
1161 goto fail;
83c60c9f 1162
034c6ed7
LP		 1163 *_pid = pid;
1164
1165 return 0;
1166
1167fail:
e537352b 1168 unit_unwatch_timer(UNIT(s), &s->timer_watch);
83c60c9f
LP		 1169
1170 return r;
542563ba
LP		 1171}
1172
cfc4eb4c 1173static void socket_enter_dead(Socket *s, SocketResult f) {
034c6ed7
LP		 1174 assert(s);
1175
cfc4eb4c
LP		 1176 if (f != SOCKET_SUCCESS)
1177 s->result = f;
034c6ed7 1178
cfc4eb4c 1179 socket_set_state(s, s->result != SOCKET_SUCCESS ? SOCKET_FAILED : SOCKET_DEAD);
034c6ed7
LP		 1180}
1181
cfc4eb4c 1182static void socket_enter_signal(Socket *s, SocketState state, SocketResult f);
80876c20 1183
cfc4eb4c 1184static void socket_enter_stop_post(Socket *s, SocketResult f) {
034c6ed7
LP		 1185 int r;
1186 assert(s);
1187
cfc4eb4c
LP		 1188 if (f != SOCKET_SUCCESS)
1189 s->result = f;
034c6ed7 1190
5e94833f
LP		 1191 socket_unwatch_control_pid(s);
1192
a16e1123
LP		 1193 s->control_command_id = SOCKET_EXEC_STOP_POST;
1194
80876c20 1195 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
e537352b 1196 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1197 goto fail;
1198
80876c20
LP		 1199 socket_set_state(s, SOCKET_STOP_POST);
1200 } else
cfc4eb4c 1201 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_SUCCESS);
034c6ed7
LP		 1202
1203 return;
1204
1205fail:
1124fe6f 1206 log_warning("%s failed to run 'stop-post' task: %s", UNIT(s)->id, strerror(-r));
cfc4eb4c 1207 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES);
034c6ed7
LP		 1208}
1209
cfc4eb4c 1210static void socket_enter_signal(Socket *s, SocketState state, SocketResult f) {
034c6ed7 1211 int r;
ca949c9d
LP		 1212 Set *pid_set = NULL;
1213 bool wait_for_exit = false;
034c6ed7
LP		 1214
1215 assert(s);
1216
cfc4eb4c
LP		 1217 if (f != SOCKET_SUCCESS)
1218 s->result = f;
034c6ed7 1219
2e22afe9
LP		 1220 if (s->exec_context.kill_mode != KILL_NONE) {
1221 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
034c6ed7 1222
ca949c9d 1223 if (s->control_pid > 0) {
cd25cce9 1224 if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
50159e6a 1225
ca949c9d
LP		 1226 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1227 else
1228 wait_for_exit = true;
034c6ed7 1229 }
50159e6a 1230
ca949c9d
LP		 1231 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1232
1233 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1234 r = -ENOMEM;
50159e6a
LP		 1235 goto fail;
1236 }
ca949c9d
LP		 1237
1238 /* Exclude the control pid from being killed via the cgroup */
1239 if (s->control_pid > 0)
1240 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1241 goto fail;
1242
1124fe6f 1243 if ((r = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, sig, true, pid_set)) < 0) {
ca949c9d
LP		 1244 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1245 log_warning("Failed to kill control group: %s", strerror(-r));
1246 } else if (r > 0)
1247 wait_for_exit = true;
1248
1249 set_free(pid_set);
da19d5c1 1250 pid_set = NULL;
ca949c9d 1251 }
d6ea93e3 1252 }
034c6ed7 1253
ca949c9d 1254 if (wait_for_exit) {
80876c20
LP		 1255 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1256 goto fail;
d6ea93e3 1257
80876c20
LP		 1258 socket_set_state(s, state);
1259 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
cfc4eb4c 1260 socket_enter_stop_post(s, SOCKET_SUCCESS);
80876c20 1261 else
cfc4eb4c 1262 socket_enter_dead(s, SOCKET_SUCCESS);
034c6ed7
LP		 1263
1264 return;
1265
1266fail:
1124fe6f 1267 log_warning("%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
034c6ed7
LP		 1268
1269 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
cfc4eb4c 1270 socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES);
034c6ed7 1271 else
cfc4eb4c 1272 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
ca949c9d
LP		 1273
1274 if (pid_set)
1275 set_free(pid_set);
034c6ed7
LP		 1276}
1277
cfc4eb4c 1278static void socket_enter_stop_pre(Socket *s, SocketResult f) {
034c6ed7
LP		 1279 int r;
1280 assert(s);
1281
cfc4eb4c
LP		 1282 if (f != SOCKET_SUCCESS)
1283 s->result = f;
034c6ed7 1284
5e94833f
LP		 1285 socket_unwatch_control_pid(s);
1286
a16e1123
LP		 1287 s->control_command_id = SOCKET_EXEC_STOP_PRE;
1288
80876c20 1289 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
e537352b 1290 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1291 goto fail;
1292
80876c20
LP		 1293 socket_set_state(s, SOCKET_STOP_PRE);
1294 } else
cfc4eb4c 1295 socket_enter_stop_post(s, SOCKET_SUCCESS);
034c6ed7
LP		 1296
1297 return;
1298
1299fail:
1124fe6f 1300 log_warning("%s failed to run 'stop-pre' task: %s", UNIT(s)->id, strerror(-r));
cfc4eb4c 1301 socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES);
034c6ed7
LP		 1302}
1303
e9af15c3
LP		 1304static void socket_enter_listening(Socket *s) {
1305 int r;
1306 assert(s);
1307
cfc4eb4c
LP		 1308 r = socket_watch_fds(s);
1309 if (r < 0) {
1124fe6f 1310 log_warning("%s failed to watch sockets: %s", UNIT(s)->id, strerror(-r));
e9af15c3
LP		 1311 goto fail;
1312 }
1313
1314 socket_set_state(s, SOCKET_LISTENING);
1315 return;
1316
1317fail:
cfc4eb4c 1318 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
e9af15c3
LP		 1319}
1320
034c6ed7
LP		 1321static void socket_enter_start_post(Socket *s) {
1322 int r;
1323 assert(s);
1324
cfc4eb4c
LP		 1325 r = socket_open_fds(s);
1326 if (r < 0) {
1124fe6f 1327 log_warning("%s failed to listen on sockets: %s", UNIT(s)->id, strerror(-r));
034c6ed7
LP		 1328 goto fail;
1329 }
1330
5e94833f
LP		 1331 socket_unwatch_control_pid(s);
1332
a16e1123
LP		 1333 s->control_command_id = SOCKET_EXEC_START_POST;
1334
80876c20 1335 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
cfc4eb4c
LP		 1336 r = socket_spawn(s, s->control_command, &s->control_pid);
1337 if (r < 0) {
1124fe6f 1338 log_warning("%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
034c6ed7
LP		 1339 goto fail;
1340 }
1341
80876c20
LP		 1342 socket_set_state(s, SOCKET_START_POST);
1343 } else
e9af15c3 1344 socket_enter_listening(s);
034c6ed7
LP		 1345
1346 return;
1347
1348fail:
cfc4eb4c 1349 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
034c6ed7
LP		 1350}
1351
1352static void socket_enter_start_pre(Socket *s) {
1353 int r;
1354 assert(s);
1355
5e94833f
LP		 1356 socket_unwatch_control_pid(s);
1357
a16e1123
LP		 1358 s->control_command_id = SOCKET_EXEC_START_PRE;
1359
80876c20 1360 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
e537352b 1361 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1362 goto fail;
1363
80876c20
LP		 1364 socket_set_state(s, SOCKET_START_PRE);
1365 } else
034c6ed7
LP		 1366 socket_enter_start_post(s);
1367
1368 return;
1369
1370fail:
1124fe6f 1371 log_warning("%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
cfc4eb4c 1372 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
034c6ed7
LP		 1373}
1374
4f2d528d 1375static void socket_enter_running(Socket *s, int cfd) {
034c6ed7 1376 int r;
398ef8ba 1377 DBusError error;
034c6ed7
LP		 1378
1379 assert(s);
398ef8ba 1380 dbus_error_init(&error);
034c6ed7 1381
ba3e67a7
LP		 1382 /* We don't take connections anymore if we are supposed to
1383 * shut down anyway */
18ffdfda 1384 if (unit_pending_inactive(UNIT(s))) {
1124fe6f 1385 log_debug("Suppressing connection request on %s since unit stop is scheduled.", UNIT(s)->id);
5d909e3e 1386
7c610628
LP		 1387 if (cfd >= 0)
1388 close_nointr_nofail(cfd);
1389 else {
1390 /* Flush all sockets by closing and reopening them */
1391 socket_close_fds(s);
1392
1a710b43
MS		 1393 r = socket_watch_fds(s);
1394 if (r < 0) {
1124fe6f 1395 log_warning("%s failed to watch sockets: %s", UNIT(s)->id, strerror(-r));
cfc4eb4c 1396 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
7c610628
LP		 1397 }
1398 }
1399
ba3e67a7
LP		 1400 return;
1401 }
1402
4f2d528d 1403 if (cfd < 0) {
57020a3a
LP		 1404 Iterator i;
1405 Unit *u;
f976f3f6 1406 bool pending = false;
f976f3f6
LP		 1407
1408 /* If there's already a start pending don't bother to
1409 * do anything */
1124fe6f 1410 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERS], i)
57020a3a
LP		 1411 if (unit_pending_active(u)) {
1412 pending = true;
1413 break;
1414 }
f976f3f6 1415
1a710b43
MS		 1416 if (!pending) {
1417 r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT_DEREF(s->service), JOB_REPLACE, true, &error, NULL);
1418 if (r < 0)
f976f3f6 1419 goto fail;
1a710b43 1420 }
4f2d528d
LP		 1421
1422 socket_set_state(s, SOCKET_RUNNING);
1423 } else {
b4f10a5e 1424 char *prefix, *instance = NULL, *name;
b15bdda8 1425 Service *service;
4f2d528d 1426
6cf6bbc2
LP		 1427 if (s->n_connections >= s->max_connections) {
1428 log_warning("Too many incoming connections (%u)", s->n_connections);
1429 close_nointr_nofail(cfd);
1430 return;
1431 }
1432
1a710b43
MS		 1433 r = socket_instantiate_service(s);
1434 if (r < 0)
b15bdda8
LP		 1435 goto fail;
1436
1a710b43
MS		 1437 r = instance_from_socket(cfd, s->n_accepted, &instance);
1438 if (r < 0) {
1439 if (r != -ENOTCONN)
1440 goto fail;
1441
1442 /* ENOTCONN is legitimate if TCP RST was received.
1443 * This connection is over, but the socket unit lives on. */
1444 close_nointr_nofail(cfd);
1445 return;
1446 }
4f2d528d 1447
1a710b43
MS		 1448 prefix = unit_name_to_prefix(UNIT(s)->id);
1449 if (!prefix) {
4f2d528d
LP		 1450 free(instance);
1451 r = -ENOMEM;
1452 goto fail;
1453 }
1454
1455 name = unit_name_build(prefix, instance, ".service");
1456 free(prefix);
1457 free(instance);
1458
b6dbbe1c 1459 if (!name) {
4f2d528d 1460 r = -ENOMEM;
b6dbbe1c
LP		 1461 goto fail;
1462 }
4f2d528d 1463
1a710b43
MS		 1464 r = unit_add_name(UNIT_DEREF(s->service), name);
1465 if (r < 0) {
b15bdda8 1466 free(name);
4f2d528d 1467 goto fail;
b15bdda8
LP		 1468 }
1469
57020a3a
LP		 1470 service = SERVICE(UNIT_DEREF(s->service));
1471 unit_ref_unset(&s->service);
b15bdda8 1472 s->n_accepted ++;
4f2d528d 1473
1124fe6f 1474 UNIT(service)->no_gc = false;
6c073082 1475
b15bdda8
LP		 1476 unit_choose_id(UNIT(service), name);
1477 free(name);
1478
1a710b43
MS		 1479 r = service_set_socket_fd(service, cfd, s);
1480 if (r < 0)
4f2d528d
LP		 1481 goto fail;
1482
1483 cfd = -1;
6cf6bbc2
LP		 1484 s->n_connections ++;
1485
1a710b43
MS		 1486 r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT(service), JOB_REPLACE, true, &error, NULL);
1487 if (r < 0)
4f2d528d 1488 goto fail;
c4e2ceae
LP		 1489
1490 /* Notify clients about changed counters */
1491 unit_add_to_dbus_queue(UNIT(s));
4f2d528d 1492 }
034c6ed7 1493
034c6ed7
LP		 1494 return;
1495
1496fail:
1124fe6f 1497 log_warning("%s failed to queue socket startup job: %s", UNIT(s)->id, bus_error(&error, r));
60089004 1498 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
4f2d528d
LP		 1499
1500 if (cfd >= 0)
1501 close_nointr_nofail(cfd);
398ef8ba
LP		 1502
1503 dbus_error_free(&error);
034c6ed7
LP		 1504}
1505
cfc4eb4c 1506static void socket_run_next(Socket *s) {
034c6ed7
LP		 1507 int r;
1508
1509 assert(s);
1510 assert(s->control_command);
1511 assert(s->control_command->command_next);
1512
5e94833f
LP		 1513 socket_unwatch_control_pid(s);
1514
034c6ed7
LP		 1515 s->control_command = s->control_command->command_next;
1516
e537352b 1517 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
034c6ed7
LP		 1518 goto fail;
1519
1520 return;
1521
1522fail:
1124fe6f 1523 log_warning("%s failed to run next task: %s", UNIT(s)->id, strerror(-r));
80876c20
LP		 1524
1525 if (s->state == SOCKET_START_POST)
cfc4eb4c 1526 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
034c6ed7 1527 else if (s->state == SOCKET_STOP_POST)
cfc4eb4c 1528 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
034c6ed7 1529 else
cfc4eb4c 1530 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES);
034c6ed7
LP		 1531}
1532
87f0e418
LP		 1533static int socket_start(Unit *u) {
1534 Socket *s = SOCKET(u);
83c60c9f
LP		 1535
1536 assert(s);
1537
034c6ed7
LP		 1538 /* We cannot fulfill this request right now, try again later
1539 * please! */
1540 if (s->state == SOCKET_STOP_PRE ||
1541 s->state == SOCKET_STOP_PRE_SIGKILL ||
1542 s->state == SOCKET_STOP_PRE_SIGTERM ||
1543 s->state == SOCKET_STOP_POST ||
80876c20
LP		 1544 s->state == SOCKET_FINAL_SIGTERM ||
1545 s->state == SOCKET_FINAL_SIGKILL)
034c6ed7
LP		 1546 return -EAGAIN;
1547
83c60c9f
LP		 1548 if (s->state == SOCKET_START_PRE ||
1549 s->state == SOCKET_START_POST)
034c6ed7 1550 return 0;
83c60c9f 1551
034c6ed7 1552 /* Cannot run this without the service being around */
57020a3a
LP		 1553 if (UNIT_DEREF(s->service)) {
1554 Service *service;
1555
1556 service = SERVICE(UNIT_DEREF(s->service));
1557
1124fe6f
MS		 1558 if (UNIT(service)->load_state != UNIT_LOADED) {
1559 log_error("Socket service %s not loaded, refusing.", UNIT(service)->id);
4f2d528d 1560 return -ENOENT;
4ac9236f 1561 }
4f2d528d 1562
35b8ca3a 1563 /* If the service is already active we cannot start the
4f2d528d 1564 * socket */
57020a3a
LP		 1565 if (service->state != SERVICE_DEAD &&
1566 service->state != SERVICE_FAILED &&
1567 service->state != SERVICE_AUTO_RESTART) {
1124fe6f 1568 log_error("Socket service %s already active, refusing.", UNIT(service)->id);
4f2d528d 1569 return -EBUSY;
4ac9236f 1570 }
7b4bf06b
LP		 1571
1572#ifdef HAVE_SYSV_COMPAT
57020a3a 1573 if (service->sysv_path) {
7b4bf06b
LP		 1574 log_error("Using SysV services for socket activation is not supported. Refusing.");
1575 return -ENOENT;
1576 }
1577#endif
4f2d528d 1578 }
e537352b 1579
fdf20a31 1580 assert(s->state == SOCKET_DEAD || s->state == SOCKET_FAILED);
83c60c9f 1581
cfc4eb4c 1582 s->result = SOCKET_SUCCESS;
034c6ed7
LP		 1583 socket_enter_start_pre(s);
1584 return 0;
1585}
83c60c9f 1586
87f0e418
LP		 1587static int socket_stop(Unit *u) {
1588 Socket *s = SOCKET(u);
034c6ed7
LP		 1589
1590 assert(s);
1591
e537352b
LP		 1592 /* Already on it */
1593 if (s->state == SOCKET_STOP_PRE ||
1594 s->state == SOCKET_STOP_PRE_SIGTERM ||
1595 s->state == SOCKET_STOP_PRE_SIGKILL ||
1596 s->state == SOCKET_STOP_POST ||
80876c20 1597 s->state == SOCKET_FINAL_SIGTERM ||
3f6c78dc 1598 s->state == SOCKET_FINAL_SIGKILL)
e537352b
LP		 1599 return 0;
1600
3f6c78dc
LP		 1601 /* If there's already something running we go directly into
1602 * kill mode. */
1603 if (s->state == SOCKET_START_PRE ||
1604 s->state == SOCKET_START_POST) {
cfc4eb4c 1605 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_SUCCESS);
3f6c78dc
LP		 1606 return -EAGAIN;
1607 }
1608
034c6ed7 1609 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
83c60c9f 1610
cfc4eb4c 1611 socket_enter_stop_pre(s, SOCKET_SUCCESS);
542563ba
LP		 1612 return 0;
1613}
1614
a16e1123
LP		 1615static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1616 Socket *s = SOCKET(u);
1617 SocketPort *p;
1618 int r;
1619
1620 assert(u);
1621 assert(f);
1622 assert(fds);
1623
1624 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
cfc4eb4c 1625 unit_serialize_item(u, f, "result", socket_result_to_string(s->result));
a16e1123
LP		 1626 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1627
1628 if (s->control_pid > 0)
5925dd3c 1629 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
a16e1123
LP		 1630
1631 if (s->control_command_id >= 0)
1632 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1633
1634 LIST_FOREACH(port, p, s->ports) {
1635 int copy;
1636
1637 if (p->fd < 0)
1638 continue;
1639
1640 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1641 return copy;
1642
1643 if (p->type == SOCKET_SOCKET) {
1644 char *t;
1645
1646 if ((r = socket_address_print(&p->address, &t)) < 0)
1647 return r;
1648
7a22745a
LP		 1649 if (socket_address_family(&p->address) == AF_NETLINK)
1650 unit_serialize_item_format(u, f, "netlink", "%i %s", copy, t);
1651 else
1652 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
a16e1123 1653 free(t);
b0a3f2bc
LP		 1654 } else if (p->type == SOCKET_SPECIAL)
1655 unit_serialize_item_format(u, f, "special", "%i %s", copy, p->path);
1656 else {
a16e1123
LP		 1657 assert(p->type == SOCKET_FIFO);
1658 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1659 }
1660 }
1661
1662 return 0;
1663}
1664
1665static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1666 Socket *s = SOCKET(u);
a16e1123
LP		 1667
1668 assert(u);
1669 assert(key);
1670 assert(value);
1671 assert(fds);
1672
1673 if (streq(key, "state")) {
1674 SocketState state;
1675
1676 if ((state = socket_state_from_string(value)) < 0)
1677 log_debug("Failed to parse state value %s", value);
1678 else
1679 s->deserialized_state = state;
cfc4eb4c
LP		 1680 } else if (streq(key, "result")) {
1681 SocketResult f;
a16e1123 1682
cfc4eb4c
LP		 1683 f = socket_result_from_string(value);
1684 if (f < 0)
1685 log_debug("Failed to parse result value %s", value);
1686 else if (f != SOCKET_SUCCESS)
1687 s->result = f;
a16e1123
LP		 1688
1689 } else if (streq(key, "n-accepted")) {
1690 unsigned k;
1691
e364ad06 1692 if (safe_atou(value, &k) < 0)
a16e1123
LP		 1693 log_debug("Failed to parse n-accepted value %s", value);
1694 else
1695 s->n_accepted += k;
1696 } else if (streq(key, "control-pid")) {
5925dd3c 1697 pid_t pid;
a16e1123 1698
e364ad06 1699 if (parse_pid(value, &pid) < 0)
a16e1123
LP		 1700 log_debug("Failed to parse control-pid value %s", value);
1701 else
5925dd3c 1702 s->control_pid = pid;
a16e1123
LP		 1703 } else if (streq(key, "control-command")) {
1704 SocketExecCommand id;
1705
1706 if ((id = socket_exec_command_from_string(value)) < 0)
1707 log_debug("Failed to parse exec-command value %s", value);
1708 else {
1709 s->control_command_id = id;
1710 s->control_command = s->exec_command[id];
1711 }
1712 } else if (streq(key, "fifo")) {
1713 int fd, skip = 0;
1714 SocketPort *p;
1715
1716 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1717 log_debug("Failed to parse fifo value %s", value);
1718 else {
1719
1720 LIST_FOREACH(port, p, s->ports)
b0a3f2bc
LP		 1721 if (p->type == SOCKET_FIFO &&
1722 streq_ptr(p->path, value+skip))
1723 break;
1724
1725 if (p) {
1726 if (p->fd >= 0)
1727 close_nointr_nofail(p->fd);
1728 p->fd = fdset_remove(fds, fd);
1729 }
1730 }
1731
1732 } else if (streq(key, "special")) {
1733 int fd, skip = 0;
1734 SocketPort *p;
1735
1736 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1737 log_debug("Failed to parse special value %s", value);
1738 else {
1739
1740 LIST_FOREACH(port, p, s->ports)
1741 if (p->type == SOCKET_SPECIAL &&
1742 streq_ptr(p->path, value+skip))
a16e1123
LP		 1743 break;
1744
1745 if (p) {
1746 if (p->fd >= 0)
1747 close_nointr_nofail(p->fd);
1748 p->fd = fdset_remove(fds, fd);
1749 }
1750 }
1751
1752 } else if (streq(key, "socket")) {
27ca8d7a 1753 int fd, type, skip = 0;
a16e1123
LP		 1754 SocketPort *p;
1755
27ca8d7a 1756 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
a16e1123
LP		 1757 log_debug("Failed to parse socket value %s", value);
1758 else {
1759
1760 LIST_FOREACH(port, p, s->ports)
27ca8d7a 1761 if (socket_address_is(&p->address, value+skip, type))
a16e1123
LP		 1762 break;
1763
1764 if (p) {
1765 if (p->fd >= 0)
1766 close_nointr_nofail(p->fd);
1767 p->fd = fdset_remove(fds, fd);
1768 }
1769 }
1770
7a22745a
LP		 1771 } else if (streq(key, "netlink")) {
1772 int fd, skip = 0;
1773 SocketPort *p;
1774
1775 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1776 log_debug("Failed to parse socket value %s", value);
1777 else {
1778
1779 LIST_FOREACH(port, p, s->ports)
1780 if (socket_address_is_netlink(&p->address, value+skip))
1781 break;
1782
1783 if (p) {
1784 if (p->fd >= 0)
1785 close_nointr_nofail(p->fd);
1786 p->fd = fdset_remove(fds, fd);
1787 }
1788 }
1789
a16e1123
LP		 1790 } else
1791 log_debug("Unknown serialization key '%s'", key);
1792
1793 return 0;
1794}
1795
87f0e418
LP		 1796static UnitActiveState socket_active_state(Unit *u) {
1797 assert(u);
5cb5a6ff 1798
acbb0225 1799 return state_translation_table[SOCKET(u)->state];
5cb5a6ff
LP		 1800}
1801
10a94420
LP		 1802static const char *socket_sub_state_to_string(Unit *u) {
1803 assert(u);
1804
a16e1123 1805 return socket_state_to_string(SOCKET(u)->state);
10a94420
LP		 1806}
1807
6cf6bbc2
LP		 1808static bool socket_check_gc(Unit *u) {
1809 Socket *s = SOCKET(u);
1810
1811 assert(u);
1812
1813 return s->n_connections > 0;
1814}
1815
acbb0225 1816static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
87f0e418 1817 Socket *s = SOCKET(u);
4f2d528d 1818 int cfd = -1;
9152c765 1819
034c6ed7 1820 assert(s);
8d567588 1821 assert(fd >= 0);
9152c765 1822
871d7de4
LP		 1823 if (s->state != SOCKET_LISTENING)
1824 return;
1825
ac155bb8 1826 log_debug("Incoming traffic on %s", u->id);
9152c765 1827
4f2d528d 1828 if (events != EPOLLIN) {
641e01dc
LP		 1829
1830 if (events & EPOLLHUP)
ac155bb8 1831 log_error("%s: Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that.", u->id);
641e01dc 1832 else
ac155bb8 1833 log_error("%s: Got unexpected poll event (0x%x) on socket.", u->id, events);
641e01dc 1834
8d567588 1835 goto fail;
4f2d528d
LP		 1836 }
1837
cabab516 1838 if (w->socket_accept) {
4f2d528d
LP		 1839 for (;;) {
1840
1841 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1842
1843 if (errno == EINTR)
1844 continue;
1845
1846 log_error("Failed to accept socket: %m");
8d567588 1847 goto fail;
4f2d528d
LP		 1848 }
1849
1850 break;
1851 }
4fd5948e
LP		 1852
1853 socket_apply_socket_options(s, cfd);
4f2d528d 1854 }
9152c765 1855
4f2d528d 1856 socket_enter_running(s, cfd);
8d567588
LP		 1857 return;
1858
1859fail:
cfc4eb4c 1860 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
9152c765
LP		 1861}
1862
87f0e418
LP		 1863static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1864 Socket *s = SOCKET(u);
cfc4eb4c 1865 SocketResult f;
5cb5a6ff
LP		 1866
1867 assert(s);
034c6ed7 1868 assert(pid >= 0);
5cb5a6ff 1869
8c47c732
LP		 1870 if (pid != s->control_pid)
1871 return;
542563ba 1872
034c6ed7
LP		 1873 s->control_pid = 0;
1874
cfc4eb4c
LP		 1875 if (is_clean_exit(code, status))
1876 f = SOCKET_SUCCESS;
1877 else if (code == CLD_EXITED)
1878 f = SOCKET_FAILURE_EXIT_CODE;
1879 else if (code == CLD_KILLED)
1880 f = SOCKET_FAILURE_SIGNAL;
1881 else if (code == CLD_DUMPED)
1882 f = SOCKET_FAILURE_CORE_DUMP;
1883 else
1884 assert_not_reached("Unknown code");
8c47c732 1885
b708e7ce 1886 if (s->control_command) {
6ea832a2 1887 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
a16e1123 1888
b708e7ce 1889 if (s->control_command->ignore)
cfc4eb4c 1890 f = SOCKET_SUCCESS;
b708e7ce
LP		 1891 }
1892
cfc4eb4c 1893 log_full(f == SOCKET_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
ac155bb8 1894 "%s control process exited, code=%s status=%i", u->id, sigchld_code_to_string(code), status);
034c6ed7 1895
cfc4eb4c
LP		 1896 if (f != SOCKET_SUCCESS)
1897 s->result = f;
1898
1899 if (s->control_command &&
1900 s->control_command->command_next &&
1901 f == SOCKET_SUCCESS) {
1902
ac155bb8 1903 log_debug("%s running next command for state %s", u->id, socket_state_to_string(s->state));
cfc4eb4c 1904 socket_run_next(s);
acbb0225 1905 } else {
a16e1123
LP		 1906 s->control_command = NULL;
1907 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1908
034c6ed7
LP		 1909 /* No further commands for this step, so let's figure
1910 * out what to do next */
5cb5a6ff 1911
ac155bb8 1912 log_debug("%s got final SIGCHLD for state %s", u->id, socket_state_to_string(s->state));
acbb0225 1913
034c6ed7
LP		 1914 switch (s->state) {
1915
1916 case SOCKET_START_PRE:
cfc4eb4c 1917 if (f == SOCKET_SUCCESS)
acbb0225 1918 socket_enter_start_post(s);
034c6ed7 1919 else
cfc4eb4c 1920 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, f);
034c6ed7
LP		 1921 break;
1922
1923 case SOCKET_START_POST:
cfc4eb4c 1924 if (f == SOCKET_SUCCESS)
e9af15c3 1925 socket_enter_listening(s);
034c6ed7 1926 else
cfc4eb4c 1927 socket_enter_stop_pre(s, f);
034c6ed7
LP		 1928 break;
1929
1930 case SOCKET_STOP_PRE:
1931 case SOCKET_STOP_PRE_SIGTERM:
1932 case SOCKET_STOP_PRE_SIGKILL:
cfc4eb4c 1933 socket_enter_stop_post(s, f);
034c6ed7
LP		 1934 break;
1935
1936 case SOCKET_STOP_POST:
80876c20
LP		 1937 case SOCKET_FINAL_SIGTERM:
1938 case SOCKET_FINAL_SIGKILL:
cfc4eb4c 1939 socket_enter_dead(s, f);
034c6ed7
LP		 1940 break;
1941
1942 default:
1943 assert_not_reached("Uh, control process died at wrong time.");
1944 }
1945 }
c4e2ceae
LP		 1946
1947 /* Notify clients about changed exit status */
1948 unit_add_to_dbus_queue(u);
034c6ed7 1949}
5cb5a6ff 1950
acbb0225 1951static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
87f0e418 1952 Socket *s = SOCKET(u);
5cb5a6ff 1953
034c6ed7
LP		 1954 assert(s);
1955 assert(elapsed == 1);
acbb0225 1956 assert(w == &s->timer_watch);
034c6ed7
LP		 1957
1958 switch (s->state) {
1959
1960 case SOCKET_START_PRE:
ac155bb8 1961 log_warning("%s starting timed out. Terminating.", u->id);
cfc4eb4c 1962 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT);
da19d5c1 1963 break;
80876c20 1964
034c6ed7 1965 case SOCKET_START_POST:
ac155bb8 1966 log_warning("%s starting timed out. Stopping.", u->id);
cfc4eb4c 1967 socket_enter_stop_pre(s, SOCKET_FAILURE_TIMEOUT);
034c6ed7
LP		 1968 break;
1969
1970 case SOCKET_STOP_PRE:
ac155bb8 1971 log_warning("%s stopping timed out. Terminating.", u->id);
cfc4eb4c 1972 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_FAILURE_TIMEOUT);
034c6ed7
LP		 1973 break;
1974
1975 case SOCKET_STOP_PRE_SIGTERM:
ba035df2 1976 if (s->exec_context.send_sigkill) {
ac155bb8 1977 log_warning("%s stopping timed out. Killing.", u->id);
cfc4eb4c 1978 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_FAILURE_TIMEOUT);
ba035df2 1979 } else {
ac155bb8 1980 log_warning("%s stopping timed out. Skipping SIGKILL. Ignoring.", u->id);
cfc4eb4c 1981 socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT);
ba035df2 1982 }
034c6ed7
LP		 1983 break;
1984
1985 case SOCKET_STOP_PRE_SIGKILL:
ac155bb8 1986 log_warning("%s still around after SIGKILL. Ignoring.", u->id);
cfc4eb4c 1987 socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT);
034c6ed7
LP		 1988 break;
1989
1990 case SOCKET_STOP_POST:
ac155bb8 1991 log_warning("%s stopping timed out (2). Terminating.", u->id);
cfc4eb4c 1992 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT);
034c6ed7
LP		 1993 break;
1994
80876c20 1995 case SOCKET_FINAL_SIGTERM:
ba035df2 1996 if (s->exec_context.send_sigkill) {
ac155bb8 1997 log_warning("%s stopping timed out (2). Killing.", u->id);
cfc4eb4c 1998 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_FAILURE_TIMEOUT);
ba035df2 1999 } else {
ac155bb8 2000 log_warning("%s stopping timed out (2). Skipping SIGKILL. Ignoring.", u->id);
cfc4eb4c 2001 socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT);
ba035df2 2002 }
034c6ed7
LP		 2003 break;
2004
80876c20 2005 case SOCKET_FINAL_SIGKILL:
ac155bb8 2006 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->id);
cfc4eb4c 2007 socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT);
034c6ed7
LP		 2008 break;
2009
2010 default:
2011 assert_not_reached("Timeout at wrong time.");
2012 }
5cb5a6ff
LP		 2013}
2014
44d8db9e
LP		 2015int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
2016 int *rfds;
2017 unsigned rn_fds, k;
2018 SocketPort *p;
2019
2020 assert(s);
2021 assert(fds);
2022 assert(n_fds);
2023
2024 /* Called from the service code for requesting our fds */
2025
2026 rn_fds = 0;
2027 LIST_FOREACH(port, p, s->ports)
2028 if (p->fd >= 0)
2029 rn_fds++;
2030
de3756ab
LP		 2031 if (rn_fds <= 0) {
2032 *fds = NULL;
2033 *n_fds = 0;
2034 return 0;
2035 }
2036
e364ad06 2037 if (!(rfds = new(int, rn_fds)))
44d8db9e
LP		 2038 return -ENOMEM;
2039
2040 k = 0;
2041 LIST_FOREACH(port, p, s->ports)
2042 if (p->fd >= 0)
2043 rfds[k++] = p->fd;
2044
2045 assert(k == rn_fds);
2046
2047 *fds = rfds;
2048 *n_fds = rn_fds;
2049
2050 return 0;
2051}
2052
6bda96a0 2053void socket_notify_service_dead(Socket *s, bool failed_permanent) {
ceee3d82
LP		 2054 assert(s);
2055
6cf6bbc2
LP		 2056 /* The service is dead. Dang!
2057 *
2058 * This is strictly for one-instance-for-all-connections
2059 * services. */
ceee3d82
LP		 2060
2061 if (s->state == SOCKET_RUNNING) {
6bda96a0
LP		 2062 log_debug("%s got notified about service death (failed permanently: %s)", UNIT(s)->id, yes_no(failed_permanent));
2063 if (failed_permanent)
2064 socket_enter_stop_pre(s, SOCKET_FAILURE_SERVICE_FAILED_PERMANENT);
c2f34808
MS		 2065 else
2066 socket_enter_listening(s);
ceee3d82
LP		 2067 }
2068}
2069
6cf6bbc2
LP		 2070void socket_connection_unref(Socket *s) {
2071 assert(s);
2072
2073 /* The service is dead. Yay!
2074 *
35b8ca3a 2075 * This is strictly for one-instance-per-connection
6cf6bbc2
LP		 2076 * services. */
2077
2078 assert(s->n_connections > 0);
2079 s->n_connections--;
2080
1124fe6f 2081 log_debug("%s: One connection closed, %u left.", UNIT(s)->id, s->n_connections);
6cf6bbc2
LP		 2082}
2083
fdf20a31 2084static void socket_reset_failed(Unit *u) {
5632e374
LP		 2085 Socket *s = SOCKET(u);
2086
2087 assert(s);
2088
fdf20a31 2089 if (s->state == SOCKET_FAILED)
5632e374
LP		 2090 socket_set_state(s, SOCKET_DEAD);
2091
cfc4eb4c 2092 s->result = SOCKET_SUCCESS;
5632e374
LP		 2093}
2094
8a0867d6
LP		 2095static int socket_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
2096 Socket *s = SOCKET(u);
2097 int r = 0;
2098 Set *pid_set = NULL;
2099
2100 assert(s);
2101
2102 if (who == KILL_MAIN) {
2103 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Socket units have no main processes");
a17204af 2104 return -ESRCH;
8a0867d6
LP		 2105 }
2106
2107 if (s->control_pid <= 0 && who == KILL_CONTROL) {
2108 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
a17204af 2109 return -ESRCH;
8a0867d6
LP		 2110 }
2111
3611581e
LP		 2112 if (who == KILL_CONTROL || who == KILL_ALL)
2113 if (s->control_pid > 0)
2114 if (kill(s->control_pid, signo) < 0)
2115 r = -errno;
8a0867d6 2116
3611581e 2117 if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
8a0867d6
LP		 2118 int q;
2119
2120 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
2121 return -ENOMEM;
2122
2123 /* Exclude the control pid from being killed via the cgroup */
2124 if (s->control_pid > 0)
2125 if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
2126 r = q;
2127 goto finish;
2128 }
2129
1124fe6f 2130 if ((q = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, signo, false, pid_set)) < 0)
3611581e 2131 if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
8a0867d6
LP		 2132 r = q;
2133 }
2134
2135finish:
2136 if (pid_set)
2137 set_free(pid_set);
2138
2139 return r;
2140}
2141
a16e1123
LP		 2142static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
2143 [SOCKET_DEAD] = "dead",
2144 [SOCKET_START_PRE] = "start-pre",
2145 [SOCKET_START_POST] = "start-post",
2146 [SOCKET_LISTENING] = "listening",
2147 [SOCKET_RUNNING] = "running",
2148 [SOCKET_STOP_PRE] = "stop-pre",
2149 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
2150 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
2151 [SOCKET_STOP_POST] = "stop-post",
2152 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
2153 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
fdf20a31 2154 [SOCKET_FAILED] = "failed"
a16e1123
LP		 2155};
2156
2157DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
2158
2159static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
2160 [SOCKET_EXEC_START_PRE] = "StartPre",
2161 [SOCKET_EXEC_START_POST] = "StartPost",
2162 [SOCKET_EXEC_STOP_PRE] = "StopPre",
2163 [SOCKET_EXEC_STOP_POST] = "StopPost"
2164};
2165
2166DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
2167
cfc4eb4c
LP		 2168static const char* const socket_result_table[_SOCKET_RESULT_MAX] = {
2169 [SOCKET_SUCCESS] = "success",
2170 [SOCKET_FAILURE_RESOURCES] = "resources",
2171 [SOCKET_FAILURE_TIMEOUT] = "timeout",
2172 [SOCKET_FAILURE_EXIT_CODE] = "exit-code",
2173 [SOCKET_FAILURE_SIGNAL] = "signal",
c2f34808 2174 [SOCKET_FAILURE_CORE_DUMP] = "core-dump",
6bda96a0 2175 [SOCKET_FAILURE_SERVICE_FAILED_PERMANENT] = "service-failed-permanent"
cfc4eb4c
LP		 2176};
2177
2178DEFINE_STRING_TABLE_LOOKUP(socket_result, SocketResult);
2179
87f0e418 2180const UnitVTable socket_vtable = {
5cb5a6ff 2181 .suffix = ".socket",
7d17cfbc 2182 .object_size = sizeof(Socket),
f975e971
LP		 2183 .sections =
2184 "Unit\0"
2185 "Socket\0"
2186 "Install\0",
5cb5a6ff 2187
034c6ed7
LP		 2188 .init = socket_init,
2189 .done = socket_done,
a16e1123
LP		 2190 .load = socket_load,
2191
8a0867d6
LP		 2192 .kill = socket_kill,
2193
a16e1123 2194 .coldplug = socket_coldplug,
034c6ed7 2195
5cb5a6ff
LP		 2196 .dump = socket_dump,
2197
542563ba
LP		 2198 .start = socket_start,
2199 .stop = socket_stop,
5cb5a6ff 2200
a16e1123
LP		 2201 .serialize = socket_serialize,
2202 .deserialize_item = socket_deserialize_item,
2203
5cb5a6ff 2204 .active_state = socket_active_state,
10a94420 2205 .sub_state_to_string = socket_sub_state_to_string,
5cb5a6ff 2206
6cf6bbc2
LP		 2207 .check_gc = socket_check_gc,
2208
9152c765 2209 .fd_event = socket_fd_event,
034c6ed7 2210 .sigchld_event = socket_sigchld_event,
4139c1b2
LP		 2211 .timer_event = socket_timer_event,
2212
fdf20a31 2213 .reset_failed = socket_reset_failed,
5632e374 2214
c4e2ceae
LP		 2215 .bus_interface = "org.freedesktop.systemd1.Socket",
2216 .bus_message_handler = bus_socket_message_handler,
2217 .bus_invalidating_properties = bus_socket_invalidating_properties
5cb5a6ff 2218};
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