1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
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 "load-dropin.h"
35 #include "load-fragment.h"
37 #include "unit-name.h"
38 #include "dbus-socket.h"
42 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
43 [SOCKET_DEAD] = UNIT_INACTIVE,
44 [SOCKET_START_PRE] = UNIT_ACTIVATING,
45 [SOCKET_START_POST] = UNIT_ACTIVATING,
46 [SOCKET_LISTENING] = UNIT_ACTIVE,
47 [SOCKET_RUNNING] = UNIT_ACTIVE,
48 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
49 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
50 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
51 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
52 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
53 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
54 [SOCKET_MAINTENANCE] = UNIT_MAINTENANCE
57 static void socket_init(Unit *u) {
58 Socket *s = SOCKET(u);
61 assert(u->meta.load_state == UNIT_STUB);
63 s->backlog = SOMAXCONN;
64 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
65 s->directory_mode = 0755;
66 s->socket_mode = 0666;
68 s->max_connections = 64;
75 exec_context_init(&s->exec_context);
77 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
80 static void socket_unwatch_control_pid(Socket *s) {
83 if (s->control_pid <= 0)
86 unit_unwatch_pid(UNIT(s), s->control_pid);
90 static void socket_done(Unit *u) {
91 Socket *s = SOCKET(u);
97 while ((p = s->ports)) {
98 LIST_REMOVE(SocketPort, port, s->ports, p);
101 unit_unwatch_fd(UNIT(s), &p->fd_watch);
102 close_nointr_nofail(p->fd);
109 exec_context_done(&s->exec_context);
110 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
111 s->control_command = NULL;
113 socket_unwatch_control_pid(s);
117 free(s->bind_to_device);
118 s->bind_to_device = NULL;
120 unit_unwatch_timer(u, &s->timer_watch);
122 /* Make sure no service instance refers to us anymore. */
123 LIST_FOREACH(units_per_type, i, u->meta.manager->units_per_type[UNIT_SERVICE]) {
124 Service *service = (Service *) i;
126 if (service->socket == s)
127 service->socket = NULL;
131 static bool have_non_accept_socket(Socket *s) {
139 LIST_FOREACH(port, p, s->ports) {
141 if (p->type != SOCKET_SOCKET)
144 if (!socket_address_can_accept(&p->address))
151 static int socket_verify(Socket *s) {
154 if (s->meta.load_state != UNIT_LOADED)
158 log_error("%s lacks Listen setting. Refusing.", s->meta.id);
162 if (s->accept && s->max_connections <= 0) {
163 log_error("%s's MaxConnection setting too small. Refusing.", s->meta.id);
167 if (s->exec_context.pam_name && s->kill_mode != KILL_CONTROL_GROUP) {
168 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
175 static bool socket_needs_mount(Socket *s, const char *prefix) {
180 LIST_FOREACH(port, p, s->ports) {
182 if (p->type == SOCKET_SOCKET) {
183 if (socket_address_needs_mount(&p->address, prefix))
186 assert(p->type == SOCKET_FIFO);
187 if (path_startswith(p->path, prefix))
195 int socket_add_one_mount_link(Socket *s, Mount *m) {
201 if (s->meta.load_state != UNIT_LOADED ||
202 m->meta.load_state != UNIT_LOADED)
205 if (!socket_needs_mount(s, m->where))
208 if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0)
214 static int socket_add_mount_links(Socket *s) {
220 LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
221 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
227 static int socket_add_device_link(Socket *s) {
233 if (!s->bind_to_device)
236 if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
239 r = unit_add_node_link(UNIT(s), t, false);
245 static int socket_add_default_dependencies(Socket *s) {
249 if (s->meta.manager->running_as == MANAGER_SYSTEM)
250 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
253 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
256 static int socket_load(Unit *u) {
257 Socket *s = SOCKET(u);
261 assert(u->meta.load_state == UNIT_STUB);
263 if ((r = unit_load_fragment_and_dropin(u)) < 0)
266 /* This is a new unit? Then let's add in some extras */
267 if (u->meta.load_state == UNIT_LOADED) {
269 if (have_non_accept_socket(s)) {
270 if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)))
273 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
277 if ((r = socket_add_mount_links(s)) < 0)
280 if ((r = socket_add_device_link(s)) < 0)
283 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
286 if ((r = unit_add_default_cgroup(u)) < 0)
289 if (s->meta.default_dependencies)
290 if ((r = socket_add_default_dependencies(s)) < 0)
294 return socket_verify(s);
297 static const char* listen_lookup(int type) {
299 if (type == SOCK_STREAM)
300 return "ListenStream";
301 else if (type == SOCK_DGRAM)
302 return "ListenDatagram";
303 else if (type == SOCK_SEQPACKET)
304 return "ListenSequentialPacket";
306 assert_not_reached("Unknown socket type");
310 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
313 Socket *s = SOCKET(u);
321 p2 = strappend(prefix, "\t");
322 prefix2 = p2 ? p2 : prefix;
325 "%sSocket State: %s\n"
326 "%sBindIPv6Only: %s\n"
329 "%sSocketMode: %04o\n"
330 "%sDirectoryMode: %04o\n"
333 prefix, socket_state_to_string(s->state),
334 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
336 prefix, kill_mode_to_string(s->kill_mode),
337 prefix, s->socket_mode,
338 prefix, s->directory_mode,
339 prefix, yes_no(s->keep_alive),
340 prefix, yes_no(s->free_bind));
342 if (s->control_pid > 0)
344 "%sControl PID: %lu\n",
345 prefix, (unsigned long) s->control_pid);
347 if (s->bind_to_device)
349 "%sBindToDevice: %s\n",
350 prefix, s->bind_to_device);
355 "%sNConnections: %u\n"
356 "%sMaxConnections: %u\n",
357 prefix, s->n_accepted,
358 prefix, s->n_connections,
359 prefix, s->max_connections);
361 if (s->priority >= 0)
364 prefix, s->priority);
366 if (s->receive_buffer > 0)
368 "%sReceiveBuffer: %zu\n",
369 prefix, s->receive_buffer);
371 if (s->send_buffer > 0)
373 "%sSendBuffer: %zu\n",
374 prefix, s->send_buffer);
386 if (s->pipe_size > 0)
389 prefix, s->pipe_size);
396 LIST_FOREACH(port, p, s->ports) {
398 if (p->type == SOCKET_SOCKET) {
403 if ((r = socket_address_print(&p->address, &k)) < 0)
408 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
411 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
414 exec_context_dump(&s->exec_context, f, prefix);
416 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
417 if (!s->exec_command[c])
420 fprintf(f, "%s-> %s:\n",
421 prefix, socket_exec_command_to_string(c));
423 exec_command_dump_list(s->exec_command[c], f, prefix2);
429 static int instance_from_socket(int fd, unsigned nr, char **instance) {
434 struct sockaddr_un un;
435 struct sockaddr_in in;
436 struct sockaddr_in6 in6;
437 struct sockaddr_storage storage;
444 if (getsockname(fd, &local.sa, &l) < 0)
448 if (getpeername(fd, &remote.sa, &l) < 0)
451 switch (local.sa.sa_family) {
455 a = ntohl(local.in.sin_addr.s_addr),
456 b = ntohl(remote.in.sin_addr.s_addr);
459 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
461 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
462 ntohs(local.in.sin_port),
463 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
464 ntohs(remote.in.sin_port)) < 0)
471 static const char ipv4_prefix[] = {
472 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
475 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
476 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
478 *a = local.in6.sin6_addr.s6_addr+12,
479 *b = remote.in6.sin6_addr.s6_addr+12;
482 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
484 a[0], a[1], a[2], a[3],
485 ntohs(local.in6.sin6_port),
486 b[0], b[1], b[2], b[3],
487 ntohs(remote.in6.sin6_port)) < 0)
490 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
495 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
496 ntohs(local.in6.sin6_port),
497 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
498 ntohs(remote.in6.sin6_port)) < 0)
509 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
515 (unsigned long) ucred.pid,
516 (unsigned long) ucred.uid) < 0)
523 assert_not_reached("Unhandled socket type.");
530 static void socket_close_fds(Socket *s) {
535 LIST_FOREACH(port, p, s->ports) {
539 unit_unwatch_fd(UNIT(s), &p->fd_watch);
540 close_nointr_nofail(p->fd);
542 /* One little note: we should never delete any sockets
543 * in the file system here! After all some other
544 * process we spawned might still have a reference of
545 * this fd and wants to continue to use it. Therefore
546 * we delete sockets in the file system before we
547 * create a new one, not after we stopped using
554 static void socket_apply_socket_options(Socket *s, int fd) {
559 int b = s->keep_alive;
560 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
561 log_warning("SO_KEEPALIVE failed: %m");
564 if (s->priority >= 0)
565 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
566 log_warning("SO_PRIORITY failed: %m");
568 if (s->receive_buffer > 0) {
569 int value = (int) s->receive_buffer;
570 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
571 log_warning("SO_RCVBUF failed: %m");
574 if (s->send_buffer > 0) {
575 int value = (int) s->send_buffer;
576 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
577 log_warning("SO_SNDBUF failed: %m");
581 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
582 log_warning("SO_MARK failed: %m");
585 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
586 log_warning("IP_TOS failed: %m");
588 if (s->ip_ttl >= 0) {
591 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
592 x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
595 log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
599 static void socket_apply_pipe_options(Socket *s, int fd) {
603 if (s->pipe_size > 0)
604 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
605 log_warning("F_SETPIPE_SZ: %m");
608 static int socket_open_fds(Socket *s) {
614 LIST_FOREACH(port, p, s->ports) {
619 if (p->type == SOCKET_SOCKET) {
621 if ((r = socket_address_listen(
632 socket_apply_socket_options(s, p->fd);
636 assert(p->type == SOCKET_FIFO);
638 mkdir_parents(p->path, s->directory_mode);
640 if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
645 if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
650 if (fstat(p->fd, &st) < 0) {
655 /* FIXME verify user, access mode */
657 if (!S_ISFIFO(st.st_mode)) {
662 socket_apply_pipe_options(s, p->fd);
673 static void socket_unwatch_fds(Socket *s) {
678 LIST_FOREACH(port, p, s->ports) {
682 unit_unwatch_fd(UNIT(s), &p->fd_watch);
686 static int socket_watch_fds(Socket *s) {
692 LIST_FOREACH(port, p, s->ports) {
696 p->fd_watch.socket_accept =
698 p->type == SOCKET_SOCKET &&
699 socket_address_can_accept(&p->address);
701 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
708 socket_unwatch_fds(s);
712 static void socket_set_state(Socket *s, SocketState state) {
713 SocketState old_state;
716 old_state = s->state;
719 if (state != SOCKET_START_PRE &&
720 state != SOCKET_START_POST &&
721 state != SOCKET_STOP_PRE &&
722 state != SOCKET_STOP_PRE_SIGTERM &&
723 state != SOCKET_STOP_PRE_SIGKILL &&
724 state != SOCKET_STOP_POST &&
725 state != SOCKET_FINAL_SIGTERM &&
726 state != SOCKET_FINAL_SIGKILL) {
727 unit_unwatch_timer(UNIT(s), &s->timer_watch);
728 socket_unwatch_control_pid(s);
729 s->control_command = NULL;
730 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
733 if (state != SOCKET_LISTENING)
734 socket_unwatch_fds(s);
736 if (state != SOCKET_START_POST &&
737 state != SOCKET_LISTENING &&
738 state != SOCKET_RUNNING &&
739 state != SOCKET_STOP_PRE &&
740 state != SOCKET_STOP_PRE_SIGTERM &&
741 state != SOCKET_STOP_PRE_SIGKILL)
744 if (state != old_state)
745 log_debug("%s changed %s -> %s",
747 socket_state_to_string(old_state),
748 socket_state_to_string(state));
750 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
753 static int socket_coldplug(Unit *u) {
754 Socket *s = SOCKET(u);
758 assert(s->state == SOCKET_DEAD);
760 if (s->deserialized_state != s->state) {
762 if (s->deserialized_state == SOCKET_START_PRE ||
763 s->deserialized_state == SOCKET_START_POST ||
764 s->deserialized_state == SOCKET_STOP_PRE ||
765 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
766 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
767 s->deserialized_state == SOCKET_STOP_POST ||
768 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
769 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
771 if (s->control_pid <= 0)
774 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
777 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
781 if (s->deserialized_state == SOCKET_START_POST ||
782 s->deserialized_state == SOCKET_LISTENING ||
783 s->deserialized_state == SOCKET_RUNNING ||
784 s->deserialized_state == SOCKET_STOP_PRE ||
785 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
786 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
787 if ((r = socket_open_fds(s)) < 0)
790 if (s->deserialized_state == SOCKET_LISTENING)
791 if ((r = socket_watch_fds(s)) < 0)
794 socket_set_state(s, s->deserialized_state);
800 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
809 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
812 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
821 s->meta.manager->environment,
824 s->meta.manager->confirm_spawn,
825 s->meta.cgroup_bondings,
832 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
833 /* FIXME: we need to do something here */
841 unit_unwatch_timer(UNIT(s), &s->timer_watch);
846 static void socket_enter_dead(Socket *s, bool success) {
852 socket_set_state(s, s->failure ? SOCKET_MAINTENANCE : SOCKET_DEAD);
855 static void socket_enter_signal(Socket *s, SocketState state, bool success);
857 static void socket_enter_stop_post(Socket *s, bool success) {
864 socket_unwatch_control_pid(s);
866 s->control_command_id = SOCKET_EXEC_STOP_POST;
868 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
869 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
872 socket_set_state(s, SOCKET_STOP_POST);
874 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
879 log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
880 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
883 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
892 if (s->kill_mode != KILL_NONE) {
893 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
895 if (s->kill_mode == KILL_CONTROL_GROUP) {
897 if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig)) < 0) {
898 if (r != -EAGAIN && r != -ESRCH)
904 if (!sent && s->control_pid > 0)
905 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
911 if (sent && s->control_pid > 0) {
912 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
915 socket_set_state(s, state);
916 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
917 socket_enter_stop_post(s, true);
919 socket_enter_dead(s, true);
924 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
926 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
927 socket_enter_stop_post(s, false);
929 socket_enter_dead(s, false);
932 static void socket_enter_stop_pre(Socket *s, bool success) {
939 socket_unwatch_control_pid(s);
941 s->control_command_id = SOCKET_EXEC_STOP_PRE;
943 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
944 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
947 socket_set_state(s, SOCKET_STOP_PRE);
949 socket_enter_stop_post(s, true);
954 log_warning("%s failed to run 'stop-pre' task: %s", s->meta.id, strerror(-r));
955 socket_enter_stop_post(s, false);
958 static void socket_enter_listening(Socket *s) {
962 if ((r = socket_watch_fds(s)) < 0) {
963 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
967 socket_set_state(s, SOCKET_LISTENING);
971 socket_enter_stop_pre(s, false);
974 static void socket_enter_start_post(Socket *s) {
978 if ((r = socket_open_fds(s)) < 0) {
979 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
983 socket_unwatch_control_pid(s);
985 s->control_command_id = SOCKET_EXEC_START_POST;
987 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
988 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
989 log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
993 socket_set_state(s, SOCKET_START_POST);
995 socket_enter_listening(s);
1000 socket_enter_stop_pre(s, false);
1003 static void socket_enter_start_pre(Socket *s) {
1007 socket_unwatch_control_pid(s);
1009 s->control_command_id = SOCKET_EXEC_START_PRE;
1011 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
1012 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1015 socket_set_state(s, SOCKET_START_PRE);
1017 socket_enter_start_post(s);
1022 log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
1023 socket_enter_dead(s, false);
1026 static void socket_enter_running(Socket *s, int cfd) {
1032 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
1035 socket_set_state(s, SOCKET_RUNNING);
1038 char *prefix, *instance, *name;
1040 if (s->n_connections >= s->max_connections) {
1041 log_warning("Too many incoming connections (%u)", s->n_connections);
1042 close_nointr_nofail(cfd);
1046 if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)) < 0)
1049 if (!(prefix = unit_name_to_prefix(s->meta.id))) {
1055 name = unit_name_build(prefix, instance, ".service");
1064 r = manager_load_unit(s->meta.manager, name, NULL, &u);
1070 if ((r = service_set_socket_fd(SERVICE(u), cfd, s)) < 0)
1075 s->n_connections ++;
1077 if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, NULL)) < 0)
1084 log_warning("%s failed to queue socket startup job: %s", s->meta.id, strerror(-r));
1085 socket_enter_stop_pre(s, false);
1088 close_nointr_nofail(cfd);
1091 static void socket_run_next(Socket *s, bool success) {
1095 assert(s->control_command);
1096 assert(s->control_command->command_next);
1101 socket_unwatch_control_pid(s);
1103 s->control_command = s->control_command->command_next;
1105 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1111 log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
1113 if (s->state == SOCKET_START_POST)
1114 socket_enter_stop_pre(s, false);
1115 else if (s->state == SOCKET_STOP_POST)
1116 socket_enter_dead(s, false);
1118 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1121 static int socket_start(Unit *u) {
1122 Socket *s = SOCKET(u);
1126 /* We cannot fulfill this request right now, try again later
1128 if (s->state == SOCKET_STOP_PRE ||
1129 s->state == SOCKET_STOP_PRE_SIGKILL ||
1130 s->state == SOCKET_STOP_PRE_SIGTERM ||
1131 s->state == SOCKET_STOP_POST ||
1132 s->state == SOCKET_FINAL_SIGTERM ||
1133 s->state == SOCKET_FINAL_SIGKILL)
1136 if (s->state == SOCKET_START_PRE ||
1137 s->state == SOCKET_START_POST)
1140 /* Cannot run this without the service being around */
1142 if (s->service->meta.load_state != UNIT_LOADED)
1145 /* If the service is alredy actvie we cannot start the
1147 if (s->service->state != SERVICE_DEAD &&
1148 s->service->state != SERVICE_MAINTENANCE &&
1149 s->service->state != SERVICE_AUTO_RESTART)
1153 assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTENANCE);
1156 socket_enter_start_pre(s);
1160 static int socket_stop(Unit *u) {
1161 Socket *s = SOCKET(u);
1165 /* We cannot fulfill this request right now, try again later
1167 if (s->state == SOCKET_START_PRE ||
1168 s->state == SOCKET_START_POST)
1172 if (s->state == SOCKET_STOP_PRE ||
1173 s->state == SOCKET_STOP_PRE_SIGTERM ||
1174 s->state == SOCKET_STOP_PRE_SIGKILL ||
1175 s->state == SOCKET_STOP_POST ||
1176 s->state == SOCKET_FINAL_SIGTERM ||
1177 s->state == SOCKET_FINAL_SIGTERM)
1180 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1182 socket_enter_stop_pre(s, true);
1186 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1187 Socket *s = SOCKET(u);
1195 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1196 unit_serialize_item(u, f, "failure", yes_no(s->failure));
1197 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1199 if (s->control_pid > 0)
1200 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1202 if (s->control_command_id >= 0)
1203 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1205 LIST_FOREACH(port, p, s->ports) {
1211 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1214 if (p->type == SOCKET_SOCKET) {
1217 if ((r = socket_address_print(&p->address, &t)) < 0)
1220 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1223 assert(p->type == SOCKET_FIFO);
1224 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1231 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1232 Socket *s = SOCKET(u);
1240 if (streq(key, "state")) {
1243 if ((state = socket_state_from_string(value)) < 0)
1244 log_debug("Failed to parse state value %s", value);
1246 s->deserialized_state = state;
1247 } else if (streq(key, "failure")) {
1250 if ((b = parse_boolean(value)) < 0)
1251 log_debug("Failed to parse failure value %s", value);
1253 s->failure = b || s->failure;
1255 } else if (streq(key, "n-accepted")) {
1258 if ((r = safe_atou(value, &k)) < 0)
1259 log_debug("Failed to parse n-accepted value %s", value);
1262 } else if (streq(key, "control-pid")) {
1265 if ((r = parse_pid(value, &pid)) < 0)
1266 log_debug("Failed to parse control-pid value %s", value);
1268 s->control_pid = pid;
1269 } else if (streq(key, "control-command")) {
1270 SocketExecCommand id;
1272 if ((id = socket_exec_command_from_string(value)) < 0)
1273 log_debug("Failed to parse exec-command value %s", value);
1275 s->control_command_id = id;
1276 s->control_command = s->exec_command[id];
1278 } else if (streq(key, "fifo")) {
1282 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1283 log_debug("Failed to parse fifo value %s", value);
1286 LIST_FOREACH(port, p, s->ports)
1287 if (streq(p->path, value+skip))
1292 close_nointr_nofail(p->fd);
1293 p->fd = fdset_remove(fds, fd);
1297 } else if (streq(key, "socket")) {
1298 int fd, type, skip = 0;
1301 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1302 log_debug("Failed to parse socket value %s", value);
1305 LIST_FOREACH(port, p, s->ports)
1306 if (socket_address_is(&p->address, value+skip, type))
1311 close_nointr_nofail(p->fd);
1312 p->fd = fdset_remove(fds, fd);
1317 log_debug("Unknown serialization key '%s'", key);
1322 static UnitActiveState socket_active_state(Unit *u) {
1325 return state_translation_table[SOCKET(u)->state];
1328 static const char *socket_sub_state_to_string(Unit *u) {
1331 return socket_state_to_string(SOCKET(u)->state);
1334 static bool socket_check_gc(Unit *u) {
1335 Socket *s = SOCKET(u);
1339 return s->n_connections > 0;
1342 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1343 Socket *s = SOCKET(u);
1349 if (s->state != SOCKET_LISTENING)
1352 log_debug("Incoming traffic on %s", u->meta.id);
1354 if (events != EPOLLIN) {
1355 log_error("Got invalid poll event on socket.");
1359 if (w->socket_accept) {
1362 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1367 log_error("Failed to accept socket: %m");
1374 socket_apply_socket_options(s, cfd);
1377 socket_enter_running(s, cfd);
1381 socket_enter_stop_pre(s, false);
1384 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1385 Socket *s = SOCKET(u);
1391 if (pid != s->control_pid)
1396 success = is_clean_exit(code, status);
1397 s->failure = s->failure || !success;
1399 if (s->control_command)
1400 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1402 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1404 if (s->control_command && s->control_command->command_next && success) {
1405 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1406 socket_run_next(s, success);
1408 s->control_command = NULL;
1409 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1411 /* No further commands for this step, so let's figure
1412 * out what to do next */
1414 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1418 case SOCKET_START_PRE:
1420 socket_enter_start_post(s);
1422 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1425 case SOCKET_START_POST:
1427 socket_enter_listening(s);
1429 socket_enter_stop_pre(s, false);
1432 case SOCKET_STOP_PRE:
1433 case SOCKET_STOP_PRE_SIGTERM:
1434 case SOCKET_STOP_PRE_SIGKILL:
1435 socket_enter_stop_post(s, success);
1438 case SOCKET_STOP_POST:
1439 case SOCKET_FINAL_SIGTERM:
1440 case SOCKET_FINAL_SIGKILL:
1441 socket_enter_dead(s, success);
1445 assert_not_reached("Uh, control process died at wrong time.");
1450 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1451 Socket *s = SOCKET(u);
1454 assert(elapsed == 1);
1455 assert(w == &s->timer_watch);
1459 case SOCKET_START_PRE:
1460 log_warning("%s starting timed out. Terminating.", u->meta.id);
1461 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1463 case SOCKET_START_POST:
1464 log_warning("%s starting timed out. Stopping.", u->meta.id);
1465 socket_enter_stop_pre(s, false);
1468 case SOCKET_STOP_PRE:
1469 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1470 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1473 case SOCKET_STOP_PRE_SIGTERM:
1474 log_warning("%s stopping timed out. Killing.", u->meta.id);
1475 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1478 case SOCKET_STOP_PRE_SIGKILL:
1479 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1480 socket_enter_stop_post(s, false);
1483 case SOCKET_STOP_POST:
1484 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1485 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1488 case SOCKET_FINAL_SIGTERM:
1489 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1490 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1493 case SOCKET_FINAL_SIGKILL:
1494 log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id);
1495 socket_enter_dead(s, false);
1499 assert_not_reached("Timeout at wrong time.");
1503 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1512 /* Called from the service code for requesting our fds */
1515 LIST_FOREACH(port, p, s->ports)
1519 if (!(rfds = new(int, rn_fds)) < 0)
1523 LIST_FOREACH(port, p, s->ports)
1527 assert(k == rn_fds);
1535 void socket_notify_service_dead(Socket *s) {
1538 /* The service is dead. Dang!
1540 * This is strictly for one-instance-for-all-connections
1543 if (s->state == SOCKET_RUNNING) {
1544 log_debug("%s got notified about service death.", s->meta.id);
1545 socket_enter_listening(s);
1549 void socket_connection_unref(Socket *s) {
1552 /* The service is dead. Yay!
1554 * This is strictly for one-onstance-per-connection
1557 assert(s->n_connections > 0);
1560 log_debug("%s: One connection closed, %u left.", s->meta.id, s->n_connections);
1563 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1564 [SOCKET_DEAD] = "dead",
1565 [SOCKET_START_PRE] = "start-pre",
1566 [SOCKET_START_POST] = "start-post",
1567 [SOCKET_LISTENING] = "listening",
1568 [SOCKET_RUNNING] = "running",
1569 [SOCKET_STOP_PRE] = "stop-pre",
1570 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1571 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1572 [SOCKET_STOP_POST] = "stop-post",
1573 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1574 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
1575 [SOCKET_MAINTENANCE] = "maintenance"
1578 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1580 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1581 [SOCKET_EXEC_START_PRE] = "StartPre",
1582 [SOCKET_EXEC_START_POST] = "StartPost",
1583 [SOCKET_EXEC_STOP_PRE] = "StopPre",
1584 [SOCKET_EXEC_STOP_POST] = "StopPost"
1587 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1589 const UnitVTable socket_vtable = {
1590 .suffix = ".socket",
1592 .init = socket_init,
1593 .done = socket_done,
1594 .load = socket_load,
1596 .coldplug = socket_coldplug,
1598 .dump = socket_dump,
1600 .start = socket_start,
1601 .stop = socket_stop,
1603 .serialize = socket_serialize,
1604 .deserialize_item = socket_deserialize_item,
1606 .active_state = socket_active_state,
1607 .sub_state_to_string = socket_sub_state_to_string,
1609 .check_gc = socket_check_gc,
1611 .fd_event = socket_fd_event,
1612 .sigchld_event = socket_sigchld_event,
1613 .timer_event = socket_timer_event,
1615 .bus_message_handler = bus_socket_message_handler