1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
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.
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.
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/>.
22 #include <sys/types.h>
27 #include <sys/epoll.h>
29 #include <arpa/inet.h>
34 #include "netinet/tcp.h"
36 #include "load-dropin.h"
37 #include "load-fragment.h"
39 #include "unit-name.h"
40 #include "dbus-socket.h"
43 #include "bus-errors.h"
45 #include "exit-status.h"
48 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
49 [SOCKET_DEAD] = UNIT_INACTIVE,
50 [SOCKET_START_PRE] = UNIT_ACTIVATING,
51 [SOCKET_START_POST] = UNIT_ACTIVATING,
52 [SOCKET_LISTENING] = UNIT_ACTIVE,
53 [SOCKET_RUNNING] = UNIT_ACTIVE,
54 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
55 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
56 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
57 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
58 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
59 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
60 [SOCKET_FAILED] = UNIT_FAILED
63 static void socket_init(Unit *u) {
64 Socket *s = SOCKET(u);
67 assert(u->meta.load_state == UNIT_STUB);
69 s->backlog = SOMAXCONN;
70 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
71 s->directory_mode = 0755;
72 s->socket_mode = 0666;
74 s->max_connections = 64;
81 exec_context_init(&s->exec_context);
82 s->exec_context.std_output = u->meta.manager->default_std_output;
83 s->exec_context.std_error = u->meta.manager->default_std_error;
85 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
88 static void socket_unwatch_control_pid(Socket *s) {
91 if (s->control_pid <= 0)
94 unit_unwatch_pid(UNIT(s), s->control_pid);
98 static void socket_done(Unit *u) {
99 Socket *s = SOCKET(u);
105 while ((p = s->ports)) {
106 LIST_REMOVE(SocketPort, port, s->ports, p);
109 unit_unwatch_fd(UNIT(s), &p->fd_watch);
110 close_nointr_nofail(p->fd);
117 exec_context_done(&s->exec_context);
118 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
119 s->control_command = NULL;
121 socket_unwatch_control_pid(s);
125 free(s->tcp_congestion);
126 s->tcp_congestion = NULL;
128 free(s->bind_to_device);
129 s->bind_to_device = NULL;
131 unit_unwatch_timer(u, &s->timer_watch);
133 /* Make sure no service instance refers to us anymore. */
134 LIST_FOREACH(units_per_type, i, u->meta.manager->units_per_type[UNIT_SERVICE]) {
135 Service *service = (Service *) i;
137 if (service->accept_socket == s)
138 service->accept_socket = NULL;
140 set_remove(service->configured_sockets, s);
144 static int socket_instantiate_service(Socket *s) {
151 /* This fills in s->service if it isn't filled in yet. For
152 * Accept=yes sockets we create the next connection service
153 * here. For Accept=no this is mostly a NOP since the service
154 * is figured out at load time anyway. */
161 if (!(prefix = unit_name_to_prefix(s->meta.id)))
164 r = asprintf(&name, "%s@%u.service", prefix, s->n_accepted);
170 r = manager_load_unit(s->meta.manager, name, NULL, NULL, &u);
176 #ifdef HAVE_SYSV_COMPAT
177 if (SERVICE(u)->sysv_path) {
178 log_error("Using SysV services for socket activation is not supported. Refusing.");
183 u->meta.no_gc = true;
184 s->service = SERVICE(u);
188 static bool have_non_accept_socket(Socket *s) {
196 LIST_FOREACH(port, p, s->ports) {
198 if (p->type != SOCKET_SOCKET)
201 if (!socket_address_can_accept(&p->address))
208 static int socket_verify(Socket *s) {
211 if (s->meta.load_state != UNIT_LOADED)
215 log_error("%s lacks Listen setting. Refusing.", s->meta.id);
219 if (s->accept && have_non_accept_socket(s)) {
220 log_error("%s configured for accepting sockets, but sockets are non-accepting. Refusing.", s->meta.id);
224 if (s->accept && s->max_connections <= 0) {
225 log_error("%s's MaxConnection setting too small. Refusing.", s->meta.id);
229 if (s->accept && s->service) {
230 log_error("Explicit service configuration for accepting sockets not supported on %s. Refusing.", s->meta.id);
234 if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
235 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
242 static bool socket_needs_mount(Socket *s, const char *prefix) {
247 LIST_FOREACH(port, p, s->ports) {
249 if (p->type == SOCKET_SOCKET) {
250 if (socket_address_needs_mount(&p->address, prefix))
252 } else if (p->type == SOCKET_FIFO || p->type == SOCKET_SPECIAL) {
253 if (path_startswith(p->path, prefix))
261 int socket_add_one_mount_link(Socket *s, Mount *m) {
267 if (s->meta.load_state != UNIT_LOADED ||
268 m->meta.load_state != UNIT_LOADED)
271 if (!socket_needs_mount(s, m->where))
274 if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0)
280 static int socket_add_mount_links(Socket *s) {
286 LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
287 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
293 static int socket_add_device_link(Socket *s) {
299 if (!s->bind_to_device)
302 if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
305 r = unit_add_node_link(UNIT(s), t, false);
311 static int socket_add_default_dependencies(Socket *s) {
315 if (s->meta.manager->running_as == MANAGER_SYSTEM) {
316 if ((r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
319 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
323 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
326 static int socket_load(Unit *u) {
327 Socket *s = SOCKET(u);
331 assert(u->meta.load_state == UNIT_STUB);
333 if ((r = unit_load_fragment_and_dropin(u)) < 0)
336 /* This is a new unit? Then let's add in some extras */
337 if (u->meta.load_state == UNIT_LOADED) {
339 if (have_non_accept_socket(s)) {
342 if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)) < 0)
345 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
349 if ((r = socket_add_mount_links(s)) < 0)
352 if ((r = socket_add_device_link(s)) < 0)
355 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
358 if ((r = unit_add_default_cgroups(u)) < 0)
361 if (s->meta.default_dependencies)
362 if ((r = socket_add_default_dependencies(s)) < 0)
366 return socket_verify(s);
369 static const char* listen_lookup(int family, int type) {
371 if (family == AF_NETLINK)
372 return "ListenNetlink";
374 if (type == SOCK_STREAM)
375 return "ListenStream";
376 else if (type == SOCK_DGRAM)
377 return "ListenDatagram";
378 else if (type == SOCK_SEQPACKET)
379 return "ListenSequentialPacket";
381 assert_not_reached("Unknown socket type");
385 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
388 Socket *s = SOCKET(u);
396 p2 = strappend(prefix, "\t");
397 prefix2 = p2 ? p2 : prefix;
400 "%sSocket State: %s\n"
401 "%sBindIPv6Only: %s\n"
403 "%sSocketMode: %04o\n"
404 "%sDirectoryMode: %04o\n"
407 "%sTCPCongestion: %s\n",
408 prefix, socket_state_to_string(s->state),
409 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
411 prefix, s->socket_mode,
412 prefix, s->directory_mode,
413 prefix, yes_no(s->keep_alive),
414 prefix, yes_no(s->free_bind),
415 prefix, strna(s->tcp_congestion));
417 if (s->control_pid > 0)
419 "%sControl PID: %lu\n",
420 prefix, (unsigned long) s->control_pid);
422 if (s->bind_to_device)
424 "%sBindToDevice: %s\n",
425 prefix, s->bind_to_device);
430 "%sNConnections: %u\n"
431 "%sMaxConnections: %u\n",
432 prefix, s->n_accepted,
433 prefix, s->n_connections,
434 prefix, s->max_connections);
436 if (s->priority >= 0)
439 prefix, s->priority);
441 if (s->receive_buffer > 0)
443 "%sReceiveBuffer: %zu\n",
444 prefix, s->receive_buffer);
446 if (s->send_buffer > 0)
448 "%sSendBuffer: %zu\n",
449 prefix, s->send_buffer);
461 if (s->pipe_size > 0)
464 prefix, s->pipe_size);
471 if (s->mq_maxmsg > 0)
473 "%sMessageQueueMaxMessages: %li\n",
474 prefix, s->mq_maxmsg);
476 if (s->mq_msgsize > 0)
478 "%sMessageQueueMessageSize: %li\n",
479 prefix, s->mq_msgsize);
481 LIST_FOREACH(port, p, s->ports) {
483 if (p->type == SOCKET_SOCKET) {
488 if ((r = socket_address_print(&p->address, &k)) < 0)
493 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t);
495 } else if (p->type == SOCKET_SPECIAL)
496 fprintf(f, "%sListenSpecial: %s\n", prefix, p->path);
497 else if (p->type == SOCKET_MQUEUE)
498 fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path);
500 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
503 exec_context_dump(&s->exec_context, f, prefix);
505 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
506 if (!s->exec_command[c])
509 fprintf(f, "%s-> %s:\n",
510 prefix, socket_exec_command_to_string(c));
512 exec_command_dump_list(s->exec_command[c], f, prefix2);
518 static int instance_from_socket(int fd, unsigned nr, char **instance) {
523 struct sockaddr_un un;
524 struct sockaddr_in in;
525 struct sockaddr_in6 in6;
526 struct sockaddr_storage storage;
533 if (getsockname(fd, &local.sa, &l) < 0)
537 if (getpeername(fd, &remote.sa, &l) < 0)
540 switch (local.sa.sa_family) {
544 a = ntohl(local.in.sin_addr.s_addr),
545 b = ntohl(remote.in.sin_addr.s_addr);
548 "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
549 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
550 ntohs(local.in.sin_port),
551 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
552 ntohs(remote.in.sin_port)) < 0)
559 static const char ipv4_prefix[] = {
560 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
563 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
564 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
566 *a = local.in6.sin6_addr.s6_addr+12,
567 *b = remote.in6.sin6_addr.s6_addr+12;
570 "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
571 a[0], a[1], a[2], a[3],
572 ntohs(local.in6.sin6_port),
573 b[0], b[1], b[2], b[3],
574 ntohs(remote.in6.sin6_port)) < 0)
577 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
581 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
582 ntohs(local.in6.sin6_port),
583 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
584 ntohs(remote.in6.sin6_port)) < 0)
595 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
601 (unsigned long) ucred.pid,
602 (unsigned long) ucred.uid) < 0)
609 assert_not_reached("Unhandled socket type.");
616 static void socket_close_fds(Socket *s) {
621 LIST_FOREACH(port, p, s->ports) {
625 unit_unwatch_fd(UNIT(s), &p->fd_watch);
626 close_nointr_nofail(p->fd);
628 /* One little note: we should never delete any sockets
629 * in the file system here! After all some other
630 * process we spawned might still have a reference of
631 * this fd and wants to continue to use it. Therefore
632 * we delete sockets in the file system before we
633 * create a new one, not after we stopped using
640 static void socket_apply_socket_options(Socket *s, int fd) {
645 int b = s->keep_alive;
646 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
647 log_warning("SO_KEEPALIVE failed: %m");
650 if (s->priority >= 0)
651 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
652 log_warning("SO_PRIORITY failed: %m");
654 if (s->receive_buffer > 0) {
655 int value = (int) s->receive_buffer;
656 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
657 log_warning("SO_RCVBUF failed: %m");
660 if (s->send_buffer > 0) {
661 int value = (int) s->send_buffer;
662 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
663 log_warning("SO_SNDBUF failed: %m");
667 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
668 log_warning("SO_MARK failed: %m");
671 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
672 log_warning("IP_TOS failed: %m");
674 if (s->ip_ttl >= 0) {
677 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
679 if (socket_ipv6_is_supported())
680 x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
683 errno = EAFNOSUPPORT;
687 log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
690 if (s->tcp_congestion)
691 if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0)
692 log_warning("TCP_CONGESTION failed: %m");
695 static void socket_apply_fifo_options(Socket *s, int fd) {
699 if (s->pipe_size > 0)
700 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
701 log_warning("F_SETPIPE_SZ: %m");
704 static int fifo_address_create(
706 mode_t directory_mode,
717 mkdir_parents(path, directory_mode);
719 if ((r = label_fifofile_set(path)) < 0)
722 /* Enforce the right access mode for the fifo */
723 old_mask = umask(~ socket_mode);
725 /* Include the original umask in our mask */
726 umask(~socket_mode | old_mask);
728 r = mkfifo(path, socket_mode);
731 if (r < 0 && errno != EEXIST) {
736 if ((fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
743 if (fstat(fd, &st) < 0) {
748 if (!S_ISFIFO(st.st_mode) ||
749 (st.st_mode & 0777) != (socket_mode & ~old_mask) ||
750 st.st_uid != getuid() ||
751 st.st_gid != getgid()) {
764 close_nointr_nofail(fd);
769 static int special_address_create(
779 if ((fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
784 if (fstat(fd, &st) < 0) {
789 /* Check whether this is a /proc, /sys or /dev file or char device */
790 if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) {
800 close_nointr_nofail(fd);
805 static int mq_address_create(
815 struct mq_attr _attr, *attr = NULL;
820 if (maxmsg > 0 && msgsize > 0) {
822 _attr.mq_flags = O_NONBLOCK;
823 _attr.mq_maxmsg = maxmsg;
824 _attr.mq_msgsize = msgsize;
828 /* Enforce the right access mode for the mq */
829 old_mask = umask(~ mq_mode);
831 /* Include the original umask in our mask */
832 umask(~mq_mode | old_mask);
834 fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr);
837 if (fd < 0 && errno != EEXIST) {
842 if (fstat(fd, &st) < 0) {
847 if ((st.st_mode & 0777) != (mq_mode & ~old_mask) ||
848 st.st_uid != getuid() ||
849 st.st_gid != getgid()) {
860 close_nointr_nofail(fd);
865 static int socket_open_fds(Socket *s) {
869 bool know_label = false;
873 LIST_FOREACH(port, p, s->ports) {
878 if (p->type == SOCKET_SOCKET) {
882 if ((r = socket_instantiate_service(s)) < 0)
885 if (s->service && s->service->exec_command[SERVICE_EXEC_START])
886 if ((r = label_get_socket_label_from_exe(s->service->exec_command[SERVICE_EXEC_START]->path, &label)) < 0) {
894 if ((r = socket_address_listen(
906 socket_apply_socket_options(s, p->fd);
908 } else if (p->type == SOCKET_SPECIAL) {
910 if ((r = special_address_create(
915 } else if (p->type == SOCKET_FIFO) {
917 if ((r = fifo_address_create(
924 socket_apply_fifo_options(s, p->fd);
925 } else if (p->type == SOCKET_MQUEUE) {
927 if ((r = mq_address_create(
935 assert_not_reached("Unknown port type");
947 static void socket_unwatch_fds(Socket *s) {
952 LIST_FOREACH(port, p, s->ports) {
956 unit_unwatch_fd(UNIT(s), &p->fd_watch);
960 static int socket_watch_fds(Socket *s) {
966 LIST_FOREACH(port, p, s->ports) {
970 p->fd_watch.socket_accept =
972 p->type == SOCKET_SOCKET &&
973 socket_address_can_accept(&p->address);
975 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
982 socket_unwatch_fds(s);
986 static void socket_set_state(Socket *s, SocketState state) {
987 SocketState old_state;
990 old_state = s->state;
993 if (state != SOCKET_START_PRE &&
994 state != SOCKET_START_POST &&
995 state != SOCKET_STOP_PRE &&
996 state != SOCKET_STOP_PRE_SIGTERM &&
997 state != SOCKET_STOP_PRE_SIGKILL &&
998 state != SOCKET_STOP_POST &&
999 state != SOCKET_FINAL_SIGTERM &&
1000 state != SOCKET_FINAL_SIGKILL) {
1001 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1002 socket_unwatch_control_pid(s);
1003 s->control_command = NULL;
1004 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1007 if (state != SOCKET_LISTENING)
1008 socket_unwatch_fds(s);
1010 if (state != SOCKET_START_POST &&
1011 state != SOCKET_LISTENING &&
1012 state != SOCKET_RUNNING &&
1013 state != SOCKET_STOP_PRE &&
1014 state != SOCKET_STOP_PRE_SIGTERM &&
1015 state != SOCKET_STOP_PRE_SIGKILL)
1016 socket_close_fds(s);
1018 if (state != old_state)
1019 log_debug("%s changed %s -> %s",
1021 socket_state_to_string(old_state),
1022 socket_state_to_string(state));
1024 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
1027 static int socket_coldplug(Unit *u) {
1028 Socket *s = SOCKET(u);
1032 assert(s->state == SOCKET_DEAD);
1034 if (s->deserialized_state != s->state) {
1036 if (s->deserialized_state == SOCKET_START_PRE ||
1037 s->deserialized_state == SOCKET_START_POST ||
1038 s->deserialized_state == SOCKET_STOP_PRE ||
1039 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1040 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
1041 s->deserialized_state == SOCKET_STOP_POST ||
1042 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
1043 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
1045 if (s->control_pid <= 0)
1048 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1051 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1055 if (s->deserialized_state == SOCKET_START_POST ||
1056 s->deserialized_state == SOCKET_LISTENING ||
1057 s->deserialized_state == SOCKET_RUNNING ||
1058 s->deserialized_state == SOCKET_STOP_PRE ||
1059 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1060 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
1061 if ((r = socket_open_fds(s)) < 0)
1064 if (s->deserialized_state == SOCKET_LISTENING)
1065 if ((r = socket_watch_fds(s)) < 0)
1068 socket_set_state(s, s->deserialized_state);
1074 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
1083 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1086 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1095 s->meta.manager->environment,
1099 s->meta.manager->confirm_spawn,
1100 s->meta.cgroup_bondings,
1107 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1108 /* FIXME: we need to do something here */
1116 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1121 static void socket_enter_dead(Socket *s, bool success) {
1127 socket_set_state(s, s->failure ? SOCKET_FAILED : SOCKET_DEAD);
1130 static void socket_enter_signal(Socket *s, SocketState state, bool success);
1132 static void socket_enter_stop_post(Socket *s, bool success) {
1139 socket_unwatch_control_pid(s);
1141 s->control_command_id = SOCKET_EXEC_STOP_POST;
1143 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
1144 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1147 socket_set_state(s, SOCKET_STOP_POST);
1149 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
1154 log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1155 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1158 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
1160 Set *pid_set = NULL;
1161 bool wait_for_exit = false;
1168 if (s->exec_context.kill_mode != KILL_NONE) {
1169 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1171 if (s->control_pid > 0) {
1172 if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
1174 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1176 wait_for_exit = true;
1179 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1181 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1186 /* Exclude the control pid from being killed via the cgroup */
1187 if (s->control_pid > 0)
1188 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1191 if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
1192 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1193 log_warning("Failed to kill control group: %s", strerror(-r));
1195 wait_for_exit = true;
1202 if (wait_for_exit) {
1203 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1206 socket_set_state(s, state);
1207 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1208 socket_enter_stop_post(s, true);
1210 socket_enter_dead(s, true);
1215 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1217 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1218 socket_enter_stop_post(s, false);
1220 socket_enter_dead(s, false);
1226 static void socket_enter_stop_pre(Socket *s, bool success) {
1233 socket_unwatch_control_pid(s);
1235 s->control_command_id = SOCKET_EXEC_STOP_PRE;
1237 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
1238 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1241 socket_set_state(s, SOCKET_STOP_PRE);
1243 socket_enter_stop_post(s, true);
1248 log_warning("%s failed to run 'stop-pre' task: %s", s->meta.id, strerror(-r));
1249 socket_enter_stop_post(s, false);
1252 static void socket_enter_listening(Socket *s) {
1256 if ((r = socket_watch_fds(s)) < 0) {
1257 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
1261 socket_set_state(s, SOCKET_LISTENING);
1265 socket_enter_stop_pre(s, false);
1268 static void socket_enter_start_post(Socket *s) {
1272 if ((r = socket_open_fds(s)) < 0) {
1273 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
1277 socket_unwatch_control_pid(s);
1279 s->control_command_id = SOCKET_EXEC_START_POST;
1281 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
1282 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
1283 log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1287 socket_set_state(s, SOCKET_START_POST);
1289 socket_enter_listening(s);
1294 socket_enter_stop_pre(s, false);
1297 static void socket_enter_start_pre(Socket *s) {
1301 socket_unwatch_control_pid(s);
1303 s->control_command_id = SOCKET_EXEC_START_PRE;
1305 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
1306 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1309 socket_set_state(s, SOCKET_START_PRE);
1311 socket_enter_start_post(s);
1316 log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
1317 socket_enter_dead(s, false);
1320 static void socket_enter_running(Socket *s, int cfd) {
1325 dbus_error_init(&error);
1327 /* We don't take connections anymore if we are supposed to
1328 * shut down anyway */
1329 if (unit_pending_inactive(UNIT(s))) {
1330 log_debug("Suppressing connection request on %s since unit stop is scheduled.", s->meta.id);
1333 close_nointr_nofail(cfd);
1335 /* Flush all sockets by closing and reopening them */
1336 socket_close_fds(s);
1338 if ((r = socket_watch_fds(s)) < 0) {
1339 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
1340 socket_enter_stop_pre(s, false);
1348 bool pending = false;
1351 /* If there's already a start pending don't bother to
1353 LIST_FOREACH(units_per_type, i, s->meta.manager->units_per_type[UNIT_SERVICE]) {
1354 Service *service = (Service *) i;
1356 if (!set_get(service->configured_sockets, s))
1359 if (!unit_pending_active(UNIT(service)))
1367 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, &error, NULL)) < 0)
1370 socket_set_state(s, SOCKET_RUNNING);
1372 char *prefix, *instance = NULL, *name;
1375 if (s->n_connections >= s->max_connections) {
1376 log_warning("Too many incoming connections (%u)", s->n_connections);
1377 close_nointr_nofail(cfd);
1381 if ((r = socket_instantiate_service(s)) < 0)
1384 if ((r = instance_from_socket(cfd, s->n_accepted, &instance)) < 0)
1387 if (!(prefix = unit_name_to_prefix(s->meta.id))) {
1393 name = unit_name_build(prefix, instance, ".service");
1402 if ((r = unit_add_name(UNIT(s->service), name)) < 0) {
1407 service = s->service;
1411 service->meta.no_gc = false;
1413 unit_choose_id(UNIT(service), name);
1416 if ((r = service_set_socket_fd(service, cfd, s)) < 0)
1420 s->n_connections ++;
1422 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(service), JOB_REPLACE, true, &error, NULL)) < 0)
1425 /* Notify clients about changed counters */
1426 unit_add_to_dbus_queue(UNIT(s));
1432 log_warning("%s failed to queue socket startup job: %s", s->meta.id, bus_error(&error, r));
1433 socket_enter_stop_pre(s, false);
1436 close_nointr_nofail(cfd);
1438 dbus_error_free(&error);
1441 static void socket_run_next(Socket *s, bool success) {
1445 assert(s->control_command);
1446 assert(s->control_command->command_next);
1451 socket_unwatch_control_pid(s);
1453 s->control_command = s->control_command->command_next;
1455 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1461 log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
1463 if (s->state == SOCKET_START_POST)
1464 socket_enter_stop_pre(s, false);
1465 else if (s->state == SOCKET_STOP_POST)
1466 socket_enter_dead(s, false);
1468 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1471 static int socket_start(Unit *u) {
1472 Socket *s = SOCKET(u);
1476 /* We cannot fulfill this request right now, try again later
1478 if (s->state == SOCKET_STOP_PRE ||
1479 s->state == SOCKET_STOP_PRE_SIGKILL ||
1480 s->state == SOCKET_STOP_PRE_SIGTERM ||
1481 s->state == SOCKET_STOP_POST ||
1482 s->state == SOCKET_FINAL_SIGTERM ||
1483 s->state == SOCKET_FINAL_SIGKILL)
1486 if (s->state == SOCKET_START_PRE ||
1487 s->state == SOCKET_START_POST)
1490 /* Cannot run this without the service being around */
1492 if (s->service->meta.load_state != UNIT_LOADED) {
1493 log_error("Socket service %s not loaded, refusing.", s->service->meta.id);
1497 /* If the service is already active we cannot start the
1499 if (s->service->state != SERVICE_DEAD &&
1500 s->service->state != SERVICE_FAILED &&
1501 s->service->state != SERVICE_AUTO_RESTART) {
1502 log_error("Socket service %s already active, refusing.", s->service->meta.id);
1506 #ifdef HAVE_SYSV_COMPAT
1507 if (s->service->sysv_path) {
1508 log_error("Using SysV services for socket activation is not supported. Refusing.");
1514 assert(s->state == SOCKET_DEAD || s->state == SOCKET_FAILED);
1517 socket_enter_start_pre(s);
1521 static int socket_stop(Unit *u) {
1522 Socket *s = SOCKET(u);
1527 if (s->state == SOCKET_STOP_PRE ||
1528 s->state == SOCKET_STOP_PRE_SIGTERM ||
1529 s->state == SOCKET_STOP_PRE_SIGKILL ||
1530 s->state == SOCKET_STOP_POST ||
1531 s->state == SOCKET_FINAL_SIGTERM ||
1532 s->state == SOCKET_FINAL_SIGKILL)
1535 /* If there's already something running we go directly into
1537 if (s->state == SOCKET_START_PRE ||
1538 s->state == SOCKET_START_POST) {
1539 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, true);
1543 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1545 socket_enter_stop_pre(s, true);
1549 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1550 Socket *s = SOCKET(u);
1558 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1559 unit_serialize_item(u, f, "failure", yes_no(s->failure));
1560 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1562 if (s->control_pid > 0)
1563 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1565 if (s->control_command_id >= 0)
1566 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1568 LIST_FOREACH(port, p, s->ports) {
1574 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1577 if (p->type == SOCKET_SOCKET) {
1580 if ((r = socket_address_print(&p->address, &t)) < 0)
1583 if (socket_address_family(&p->address) == AF_NETLINK)
1584 unit_serialize_item_format(u, f, "netlink", "%i %s", copy, t);
1586 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1588 } else if (p->type == SOCKET_SPECIAL)
1589 unit_serialize_item_format(u, f, "special", "%i %s", copy, p->path);
1591 assert(p->type == SOCKET_FIFO);
1592 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1599 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1600 Socket *s = SOCKET(u);
1607 if (streq(key, "state")) {
1610 if ((state = socket_state_from_string(value)) < 0)
1611 log_debug("Failed to parse state value %s", value);
1613 s->deserialized_state = state;
1614 } else if (streq(key, "failure")) {
1617 if ((b = parse_boolean(value)) < 0)
1618 log_debug("Failed to parse failure value %s", value);
1620 s->failure = b || s->failure;
1622 } else if (streq(key, "n-accepted")) {
1625 if (safe_atou(value, &k) < 0)
1626 log_debug("Failed to parse n-accepted value %s", value);
1629 } else if (streq(key, "control-pid")) {
1632 if (parse_pid(value, &pid) < 0)
1633 log_debug("Failed to parse control-pid value %s", value);
1635 s->control_pid = pid;
1636 } else if (streq(key, "control-command")) {
1637 SocketExecCommand id;
1639 if ((id = socket_exec_command_from_string(value)) < 0)
1640 log_debug("Failed to parse exec-command value %s", value);
1642 s->control_command_id = id;
1643 s->control_command = s->exec_command[id];
1645 } else if (streq(key, "fifo")) {
1649 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1650 log_debug("Failed to parse fifo value %s", value);
1653 LIST_FOREACH(port, p, s->ports)
1654 if (p->type == SOCKET_FIFO &&
1655 streq_ptr(p->path, value+skip))
1660 close_nointr_nofail(p->fd);
1661 p->fd = fdset_remove(fds, fd);
1665 } else if (streq(key, "special")) {
1669 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1670 log_debug("Failed to parse special value %s", value);
1673 LIST_FOREACH(port, p, s->ports)
1674 if (p->type == SOCKET_SPECIAL &&
1675 streq_ptr(p->path, value+skip))
1680 close_nointr_nofail(p->fd);
1681 p->fd = fdset_remove(fds, fd);
1685 } else if (streq(key, "socket")) {
1686 int fd, type, skip = 0;
1689 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1690 log_debug("Failed to parse socket value %s", value);
1693 LIST_FOREACH(port, p, s->ports)
1694 if (socket_address_is(&p->address, value+skip, type))
1699 close_nointr_nofail(p->fd);
1700 p->fd = fdset_remove(fds, fd);
1704 } else if (streq(key, "netlink")) {
1708 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1709 log_debug("Failed to parse socket value %s", value);
1712 LIST_FOREACH(port, p, s->ports)
1713 if (socket_address_is_netlink(&p->address, value+skip))
1718 close_nointr_nofail(p->fd);
1719 p->fd = fdset_remove(fds, fd);
1724 log_debug("Unknown serialization key '%s'", key);
1729 static UnitActiveState socket_active_state(Unit *u) {
1732 return state_translation_table[SOCKET(u)->state];
1735 static const char *socket_sub_state_to_string(Unit *u) {
1738 return socket_state_to_string(SOCKET(u)->state);
1741 static bool socket_check_gc(Unit *u) {
1742 Socket *s = SOCKET(u);
1746 return s->n_connections > 0;
1749 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1750 Socket *s = SOCKET(u);
1756 if (s->state != SOCKET_LISTENING)
1759 log_debug("Incoming traffic on %s", u->meta.id);
1761 if (events != EPOLLIN) {
1763 if (events & EPOLLHUP)
1764 log_error("%s: Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that.", u->meta.id);
1766 log_error("%s: Got unexpected poll event (0x%x) on socket.", u->meta.id, events);
1771 if (w->socket_accept) {
1774 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1779 log_error("Failed to accept socket: %m");
1786 socket_apply_socket_options(s, cfd);
1789 socket_enter_running(s, cfd);
1793 socket_enter_stop_pre(s, false);
1796 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1797 Socket *s = SOCKET(u);
1803 if (pid != s->control_pid)
1808 success = is_clean_exit(code, status);
1810 if (s->control_command) {
1811 exec_status_exit(&s->control_command->exec_status, pid, code, status, s->exec_context.utmp_id);
1813 if (s->control_command->ignore)
1817 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1818 "%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1819 s->failure = s->failure || !success;
1821 if (s->control_command && s->control_command->command_next && success) {
1822 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1823 socket_run_next(s, success);
1825 s->control_command = NULL;
1826 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1828 /* No further commands for this step, so let's figure
1829 * out what to do next */
1831 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1835 case SOCKET_START_PRE:
1837 socket_enter_start_post(s);
1839 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1842 case SOCKET_START_POST:
1844 socket_enter_listening(s);
1846 socket_enter_stop_pre(s, false);
1849 case SOCKET_STOP_PRE:
1850 case SOCKET_STOP_PRE_SIGTERM:
1851 case SOCKET_STOP_PRE_SIGKILL:
1852 socket_enter_stop_post(s, success);
1855 case SOCKET_STOP_POST:
1856 case SOCKET_FINAL_SIGTERM:
1857 case SOCKET_FINAL_SIGKILL:
1858 socket_enter_dead(s, success);
1862 assert_not_reached("Uh, control process died at wrong time.");
1866 /* Notify clients about changed exit status */
1867 unit_add_to_dbus_queue(u);
1870 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1871 Socket *s = SOCKET(u);
1874 assert(elapsed == 1);
1875 assert(w == &s->timer_watch);
1879 case SOCKET_START_PRE:
1880 log_warning("%s starting timed out. Terminating.", u->meta.id);
1881 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1884 case SOCKET_START_POST:
1885 log_warning("%s starting timed out. Stopping.", u->meta.id);
1886 socket_enter_stop_pre(s, false);
1889 case SOCKET_STOP_PRE:
1890 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1891 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1894 case SOCKET_STOP_PRE_SIGTERM:
1895 if (s->exec_context.send_sigkill) {
1896 log_warning("%s stopping timed out. Killing.", u->meta.id);
1897 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1899 log_warning("%s stopping timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1900 socket_enter_stop_post(s, false);
1904 case SOCKET_STOP_PRE_SIGKILL:
1905 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1906 socket_enter_stop_post(s, false);
1909 case SOCKET_STOP_POST:
1910 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1911 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1914 case SOCKET_FINAL_SIGTERM:
1915 if (s->exec_context.send_sigkill) {
1916 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1917 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1919 log_warning("%s stopping timed out (2). Skipping SIGKILL. Ignoring.", u->meta.id);
1920 socket_enter_dead(s, false);
1924 case SOCKET_FINAL_SIGKILL:
1925 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
1926 socket_enter_dead(s, false);
1930 assert_not_reached("Timeout at wrong time.");
1934 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1943 /* Called from the service code for requesting our fds */
1946 LIST_FOREACH(port, p, s->ports)
1950 if (!(rfds = new(int, rn_fds)))
1954 LIST_FOREACH(port, p, s->ports)
1958 assert(k == rn_fds);
1966 void socket_notify_service_dead(Socket *s) {
1969 /* The service is dead. Dang!
1971 * This is strictly for one-instance-for-all-connections
1974 if (s->state == SOCKET_RUNNING) {
1975 log_debug("%s got notified about service death.", s->meta.id);
1976 socket_enter_listening(s);
1980 void socket_connection_unref(Socket *s) {
1983 /* The service is dead. Yay!
1985 * This is strictly for one-instance-per-connection
1988 assert(s->n_connections > 0);
1991 log_debug("%s: One connection closed, %u left.", s->meta.id, s->n_connections);
1994 static void socket_reset_failed(Unit *u) {
1995 Socket *s = SOCKET(u);
1999 if (s->state == SOCKET_FAILED)
2000 socket_set_state(s, SOCKET_DEAD);
2005 static int socket_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
2006 Socket *s = SOCKET(u);
2008 Set *pid_set = NULL;
2012 if (who == KILL_MAIN) {
2013 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Socket units have no main processes");
2017 if (s->control_pid <= 0 && who == KILL_CONTROL) {
2018 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
2022 if (s->control_pid > 0)
2023 if (kill(s->control_pid, signo) < 0)
2026 if (mode == KILL_CONTROL_GROUP) {
2029 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
2032 /* Exclude the control pid from being killed via the cgroup */
2033 if (s->control_pid > 0)
2034 if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
2039 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, false, pid_set)) < 0)
2040 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
2051 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
2052 [SOCKET_DEAD] = "dead",
2053 [SOCKET_START_PRE] = "start-pre",
2054 [SOCKET_START_POST] = "start-post",
2055 [SOCKET_LISTENING] = "listening",
2056 [SOCKET_RUNNING] = "running",
2057 [SOCKET_STOP_PRE] = "stop-pre",
2058 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
2059 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
2060 [SOCKET_STOP_POST] = "stop-post",
2061 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
2062 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
2063 [SOCKET_FAILED] = "failed"
2066 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
2068 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
2069 [SOCKET_EXEC_START_PRE] = "StartPre",
2070 [SOCKET_EXEC_START_POST] = "StartPost",
2071 [SOCKET_EXEC_STOP_PRE] = "StopPre",
2072 [SOCKET_EXEC_STOP_POST] = "StopPost"
2075 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
2077 const UnitVTable socket_vtable = {
2078 .suffix = ".socket",
2080 .init = socket_init,
2081 .done = socket_done,
2082 .load = socket_load,
2084 .kill = socket_kill,
2086 .coldplug = socket_coldplug,
2088 .dump = socket_dump,
2090 .start = socket_start,
2091 .stop = socket_stop,
2093 .serialize = socket_serialize,
2094 .deserialize_item = socket_deserialize_item,
2096 .active_state = socket_active_state,
2097 .sub_state_to_string = socket_sub_state_to_string,
2099 .check_gc = socket_check_gc,
2101 .fd_event = socket_fd_event,
2102 .sigchld_event = socket_sigchld_event,
2103 .timer_event = socket_timer_event,
2105 .reset_failed = socket_reset_failed,
2107 .bus_interface = "org.freedesktop.systemd1.Socket",
2108 .bus_message_handler = bus_socket_message_handler,
2109 .bus_invalidating_properties = bus_socket_invalidating_properties