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"
41 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
42 [SOCKET_DEAD] = UNIT_INACTIVE,
43 [SOCKET_START_PRE] = UNIT_ACTIVATING,
44 [SOCKET_START_POST] = UNIT_ACTIVATING,
45 [SOCKET_LISTENING] = UNIT_ACTIVE,
46 [SOCKET_RUNNING] = UNIT_ACTIVE,
47 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
48 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
49 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
50 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
51 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
52 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
53 [SOCKET_MAINTENANCE] = UNIT_MAINTENANCE
56 static void socket_init(Unit *u) {
57 Socket *s = SOCKET(u);
60 assert(u->meta.load_state == UNIT_STUB);
62 s->backlog = SOMAXCONN;
63 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
64 s->directory_mode = 0755;
65 s->socket_mode = 0666;
67 s->max_connections = 64;
74 exec_context_init(&s->exec_context);
76 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
79 static void socket_unwatch_control_pid(Socket *s) {
82 if (s->control_pid <= 0)
85 unit_unwatch_pid(UNIT(s), s->control_pid);
89 static void socket_done(Unit *u) {
90 Socket *s = SOCKET(u);
96 while ((p = s->ports)) {
97 LIST_REMOVE(SocketPort, port, s->ports, p);
100 unit_unwatch_fd(UNIT(s), &p->fd_watch);
101 close_nointr_nofail(p->fd);
108 exec_context_done(&s->exec_context);
109 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
110 s->control_command = NULL;
112 socket_unwatch_control_pid(s);
116 free(s->bind_to_device);
117 s->bind_to_device = NULL;
119 unit_unwatch_timer(u, &s->timer_watch);
121 /* Make sure no service instance refers to us anymore. */
122 LIST_FOREACH(units_per_type, i, u->meta.manager->units_per_type[UNIT_SERVICE]) {
123 Service *service = (Service *) i;
125 if (service->socket == s)
126 service->socket = NULL;
130 static bool have_non_accept_socket(Socket *s) {
138 LIST_FOREACH(port, p, s->ports) {
140 if (p->type != SOCKET_SOCKET)
143 if (!socket_address_can_accept(&p->address))
150 static int socket_verify(Socket *s) {
153 if (s->meta.load_state != UNIT_LOADED)
157 log_error("%s lacks Listen setting. Refusing.", s->meta.id);
161 if (s->accept && s->max_connections <= 0) {
162 log_error("%s's MaxConnection setting too small. Refusing.", s->meta.id);
166 if (s->exec_context.pam_name && s->kill_mode != KILL_CONTROL_GROUP) {
167 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
174 static bool socket_needs_mount(Socket *s, const char *prefix) {
179 LIST_FOREACH(port, p, s->ports) {
181 if (p->type == SOCKET_SOCKET) {
182 if (socket_address_needs_mount(&p->address, prefix))
185 assert(p->type == SOCKET_FIFO);
186 if (path_startswith(p->path, prefix))
194 int socket_add_one_mount_link(Socket *s, Mount *m) {
200 if (s->meta.load_state != UNIT_LOADED ||
201 m->meta.load_state != UNIT_LOADED)
204 if (!socket_needs_mount(s, m->where))
207 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(s), true)) < 0)
210 if ((r = unit_add_dependency(UNIT(s), UNIT_REQUIRES, UNIT(m), true)) < 0)
216 static int socket_add_mount_links(Socket *s) {
222 LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
223 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
229 static int socket_add_device_link(Socket *s) {
235 if (!s->bind_to_device)
238 if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
241 r = unit_add_node_link(UNIT(s), t, false);
247 static int socket_load(Unit *u) {
248 Socket *s = SOCKET(u);
252 assert(u->meta.load_state == UNIT_STUB);
254 if ((r = unit_load_fragment_and_dropin(u)) < 0)
257 /* This is a new unit? Then let's add in some extras */
258 if (u->meta.load_state == UNIT_LOADED) {
260 if (have_non_accept_socket(s)) {
261 if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)))
264 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
268 if ((r = socket_add_mount_links(s)) < 0)
271 if ((r = socket_add_device_link(s)) < 0)
274 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
277 if ((r = unit_add_default_cgroup(u)) < 0)
281 return socket_verify(s);
284 static const char* listen_lookup(int type) {
286 if (type == SOCK_STREAM)
287 return "ListenStream";
288 else if (type == SOCK_DGRAM)
289 return "ListenDatagram";
290 else if (type == SOCK_SEQPACKET)
291 return "ListenSequentialPacket";
293 assert_not_reached("Unknown socket type");
297 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
300 Socket *s = SOCKET(u);
308 p2 = strappend(prefix, "\t");
309 prefix2 = p2 ? p2 : prefix;
312 "%sSocket State: %s\n"
313 "%sBindIPv6Only: %s\n"
316 "%sSocketMode: %04o\n"
317 "%sDirectoryMode: %04o\n"
320 prefix, socket_state_to_string(s->state),
321 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
323 prefix, kill_mode_to_string(s->kill_mode),
324 prefix, s->socket_mode,
325 prefix, s->directory_mode,
326 prefix, yes_no(s->keep_alive),
327 prefix, yes_no(s->free_bind));
329 if (s->control_pid > 0)
331 "%sControl PID: %lu\n",
332 prefix, (unsigned long) s->control_pid);
334 if (s->bind_to_device)
336 "%sBindToDevice: %s\n",
337 prefix, s->bind_to_device);
342 "%sNConnections: %u\n"
343 "%sMaxConnections: %u\n",
344 prefix, s->n_accepted,
345 prefix, s->n_connections,
346 prefix, s->max_connections);
348 if (s->priority >= 0)
351 prefix, s->priority);
353 if (s->receive_buffer > 0)
355 "%sReceiveBuffer: %zu\n",
356 prefix, s->receive_buffer);
358 if (s->send_buffer > 0)
360 "%sSendBuffer: %zu\n",
361 prefix, s->send_buffer);
373 if (s->pipe_size > 0)
376 prefix, s->pipe_size);
383 LIST_FOREACH(port, p, s->ports) {
385 if (p->type == SOCKET_SOCKET) {
390 if ((r = socket_address_print(&p->address, &k)) < 0)
395 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
398 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
401 exec_context_dump(&s->exec_context, f, prefix);
403 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
404 if (!s->exec_command[c])
407 fprintf(f, "%s-> %s:\n",
408 prefix, socket_exec_command_to_string(c));
410 exec_command_dump_list(s->exec_command[c], f, prefix2);
416 static int instance_from_socket(int fd, unsigned nr, char **instance) {
421 struct sockaddr_un un;
422 struct sockaddr_in in;
423 struct sockaddr_in6 in6;
424 struct sockaddr_storage storage;
431 if (getsockname(fd, &local.sa, &l) < 0)
435 if (getpeername(fd, &remote.sa, &l) < 0)
438 switch (local.sa.sa_family) {
442 a = ntohl(local.in.sin_addr.s_addr),
443 b = ntohl(remote.in.sin_addr.s_addr);
446 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
448 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
449 ntohs(local.in.sin_port),
450 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
451 ntohs(remote.in.sin_port)) < 0)
458 static const char ipv4_prefix[] = {
459 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
462 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
463 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
465 *a = local.in6.sin6_addr.s6_addr+12,
466 *b = remote.in6.sin6_addr.s6_addr+12;
469 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
471 a[0], a[1], a[2], a[3],
472 ntohs(local.in6.sin6_port),
473 b[0], b[1], b[2], b[3],
474 ntohs(remote.in6.sin6_port)) < 0)
477 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
482 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
483 ntohs(local.in6.sin6_port),
484 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
485 ntohs(remote.in6.sin6_port)) < 0)
496 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
502 (unsigned long) ucred.pid,
503 (unsigned long) ucred.uid) < 0)
510 assert_not_reached("Unhandled socket type.");
517 static void socket_close_fds(Socket *s) {
522 LIST_FOREACH(port, p, s->ports) {
526 unit_unwatch_fd(UNIT(s), &p->fd_watch);
527 close_nointr_nofail(p->fd);
529 /* One little note: we should never delete any sockets
530 * in the file system here! After all some other
531 * process we spawned might still have a reference of
532 * this fd and wants to continue to use it. Therefore
533 * we delete sockets in the file system before we
534 * create a new one, not after we stopped using
541 static void socket_apply_socket_options(Socket *s, int fd) {
546 int b = s->keep_alive;
547 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
548 log_warning("SO_KEEPALIVE failed: %m");
551 if (s->priority >= 0)
552 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
553 log_warning("SO_PRIORITY failed: %m");
555 if (s->receive_buffer > 0) {
556 int value = (int) s->receive_buffer;
557 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
558 log_warning("SO_RCVBUF failed: %m");
561 if (s->send_buffer > 0) {
562 int value = (int) s->send_buffer;
563 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
564 log_warning("SO_SNDBUF failed: %m");
568 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
569 log_warning("SO_MARK failed: %m");
572 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
573 log_warning("IP_TOS failed: %m");
575 if (s->ip_ttl >= 0) {
578 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
579 x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
582 log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
586 static void socket_apply_pipe_options(Socket *s, int fd) {
590 if (s->pipe_size > 0)
591 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
592 log_warning("F_SETPIPE_SZ: %m");
595 static int socket_open_fds(Socket *s) {
601 LIST_FOREACH(port, p, s->ports) {
606 if (p->type == SOCKET_SOCKET) {
608 if ((r = socket_address_listen(
619 socket_apply_socket_options(s, p->fd);
623 assert(p->type == SOCKET_FIFO);
625 mkdir_parents(p->path, s->directory_mode);
627 if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
632 if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
637 if (fstat(p->fd, &st) < 0) {
642 /* FIXME verify user, access mode */
644 if (!S_ISFIFO(st.st_mode)) {
649 socket_apply_pipe_options(s, p->fd);
660 static void socket_unwatch_fds(Socket *s) {
665 LIST_FOREACH(port, p, s->ports) {
669 unit_unwatch_fd(UNIT(s), &p->fd_watch);
673 static int socket_watch_fds(Socket *s) {
679 LIST_FOREACH(port, p, s->ports) {
683 p->fd_watch.socket_accept =
685 p->type == SOCKET_SOCKET &&
686 socket_address_can_accept(&p->address);
688 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
695 socket_unwatch_fds(s);
699 static void socket_set_state(Socket *s, SocketState state) {
700 SocketState old_state;
703 old_state = s->state;
706 if (state != SOCKET_START_PRE &&
707 state != SOCKET_START_POST &&
708 state != SOCKET_STOP_PRE &&
709 state != SOCKET_STOP_PRE_SIGTERM &&
710 state != SOCKET_STOP_PRE_SIGKILL &&
711 state != SOCKET_STOP_POST &&
712 state != SOCKET_FINAL_SIGTERM &&
713 state != SOCKET_FINAL_SIGKILL) {
714 unit_unwatch_timer(UNIT(s), &s->timer_watch);
715 socket_unwatch_control_pid(s);
716 s->control_command = NULL;
717 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
720 if (state != SOCKET_LISTENING)
721 socket_unwatch_fds(s);
723 if (state != SOCKET_START_POST &&
724 state != SOCKET_LISTENING &&
725 state != SOCKET_RUNNING &&
726 state != SOCKET_STOP_PRE &&
727 state != SOCKET_STOP_PRE_SIGTERM &&
728 state != SOCKET_STOP_PRE_SIGKILL)
731 if (state != old_state)
732 log_debug("%s changed %s -> %s",
734 socket_state_to_string(old_state),
735 socket_state_to_string(state));
737 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
740 static int socket_coldplug(Unit *u) {
741 Socket *s = SOCKET(u);
745 assert(s->state == SOCKET_DEAD);
747 if (s->deserialized_state != s->state) {
749 if (s->deserialized_state == SOCKET_START_PRE ||
750 s->deserialized_state == SOCKET_START_POST ||
751 s->deserialized_state == SOCKET_STOP_PRE ||
752 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
753 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
754 s->deserialized_state == SOCKET_STOP_POST ||
755 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
756 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
758 if (s->control_pid <= 0)
761 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
764 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
768 if (s->deserialized_state == SOCKET_START_POST ||
769 s->deserialized_state == SOCKET_LISTENING ||
770 s->deserialized_state == SOCKET_RUNNING ||
771 s->deserialized_state == SOCKET_STOP_PRE ||
772 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
773 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
774 if ((r = socket_open_fds(s)) < 0)
777 if (s->deserialized_state == SOCKET_LISTENING)
778 if ((r = socket_watch_fds(s)) < 0)
781 socket_set_state(s, s->deserialized_state);
787 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
796 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
799 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
808 s->meta.manager->environment,
811 s->meta.manager->confirm_spawn,
812 s->meta.cgroup_bondings,
819 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
820 /* FIXME: we need to do something here */
828 unit_unwatch_timer(UNIT(s), &s->timer_watch);
833 static void socket_enter_dead(Socket *s, bool success) {
839 socket_set_state(s, s->failure ? SOCKET_MAINTENANCE : SOCKET_DEAD);
842 static void socket_enter_signal(Socket *s, SocketState state, bool success);
844 static void socket_enter_stop_post(Socket *s, bool success) {
851 socket_unwatch_control_pid(s);
853 s->control_command_id = SOCKET_EXEC_STOP_POST;
855 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
856 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
859 socket_set_state(s, SOCKET_STOP_POST);
861 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
866 log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
867 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
870 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
879 if (s->kill_mode != KILL_NONE) {
880 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
882 if (s->kill_mode == KILL_CONTROL_GROUP) {
884 if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig)) < 0) {
885 if (r != -EAGAIN && r != -ESRCH)
891 if (!sent && s->control_pid > 0)
892 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
898 if (sent && s->control_pid > 0) {
899 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
902 socket_set_state(s, state);
903 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
904 socket_enter_stop_post(s, true);
906 socket_enter_dead(s, true);
911 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
913 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
914 socket_enter_stop_post(s, false);
916 socket_enter_dead(s, false);
919 static void socket_enter_stop_pre(Socket *s, bool success) {
926 socket_unwatch_control_pid(s);
928 s->control_command_id = SOCKET_EXEC_STOP_PRE;
930 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
931 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
934 socket_set_state(s, SOCKET_STOP_PRE);
936 socket_enter_stop_post(s, true);
941 log_warning("%s failed to run 'stop-pre' task: %s", s->meta.id, strerror(-r));
942 socket_enter_stop_post(s, false);
945 static void socket_enter_listening(Socket *s) {
949 if ((r = socket_watch_fds(s)) < 0) {
950 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
954 socket_set_state(s, SOCKET_LISTENING);
958 socket_enter_stop_pre(s, false);
961 static void socket_enter_start_post(Socket *s) {
965 if ((r = socket_open_fds(s)) < 0) {
966 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
970 socket_unwatch_control_pid(s);
972 s->control_command_id = SOCKET_EXEC_START_POST;
974 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
975 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
976 log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
980 socket_set_state(s, SOCKET_START_POST);
982 socket_enter_listening(s);
987 socket_enter_stop_pre(s, false);
990 static void socket_enter_start_pre(Socket *s) {
994 socket_unwatch_control_pid(s);
996 s->control_command_id = SOCKET_EXEC_START_PRE;
998 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
999 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1002 socket_set_state(s, SOCKET_START_PRE);
1004 socket_enter_start_post(s);
1009 log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
1010 socket_enter_dead(s, false);
1013 static void socket_enter_running(Socket *s, int cfd) {
1019 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
1022 socket_set_state(s, SOCKET_RUNNING);
1025 char *prefix, *instance, *name;
1027 if (s->n_connections >= s->max_connections) {
1028 log_warning("Too many incoming connections (%u)", s->n_connections);
1029 close_nointr_nofail(cfd);
1033 if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)) < 0)
1036 if (!(prefix = unit_name_to_prefix(s->meta.id))) {
1042 name = unit_name_build(prefix, instance, ".service");
1051 r = manager_load_unit(s->meta.manager, name, NULL, &u);
1057 if ((r = service_set_socket_fd(SERVICE(u), cfd, s)) < 0)
1062 s->n_connections ++;
1064 if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, NULL)) < 0)
1071 log_warning("%s failed to queue socket startup job: %s", s->meta.id, strerror(-r));
1072 socket_enter_stop_pre(s, false);
1075 close_nointr_nofail(cfd);
1078 static void socket_run_next(Socket *s, bool success) {
1082 assert(s->control_command);
1083 assert(s->control_command->command_next);
1088 socket_unwatch_control_pid(s);
1090 s->control_command = s->control_command->command_next;
1092 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1098 log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
1100 if (s->state == SOCKET_START_POST)
1101 socket_enter_stop_pre(s, false);
1102 else if (s->state == SOCKET_STOP_POST)
1103 socket_enter_dead(s, false);
1105 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1108 static int socket_start(Unit *u) {
1109 Socket *s = SOCKET(u);
1113 /* We cannot fulfill this request right now, try again later
1115 if (s->state == SOCKET_STOP_PRE ||
1116 s->state == SOCKET_STOP_PRE_SIGKILL ||
1117 s->state == SOCKET_STOP_PRE_SIGTERM ||
1118 s->state == SOCKET_STOP_POST ||
1119 s->state == SOCKET_FINAL_SIGTERM ||
1120 s->state == SOCKET_FINAL_SIGKILL)
1123 if (s->state == SOCKET_START_PRE ||
1124 s->state == SOCKET_START_POST)
1127 /* Cannot run this without the service being around */
1129 if (s->service->meta.load_state != UNIT_LOADED)
1132 /* If the service is alredy actvie we cannot start the
1134 if (s->service->state != SERVICE_DEAD &&
1135 s->service->state != SERVICE_MAINTENANCE &&
1136 s->service->state != SERVICE_AUTO_RESTART)
1140 assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTENANCE);
1143 socket_enter_start_pre(s);
1147 static int socket_stop(Unit *u) {
1148 Socket *s = SOCKET(u);
1152 /* We cannot fulfill this request right now, try again later
1154 if (s->state == SOCKET_START_PRE ||
1155 s->state == SOCKET_START_POST)
1159 if (s->state == SOCKET_STOP_PRE ||
1160 s->state == SOCKET_STOP_PRE_SIGTERM ||
1161 s->state == SOCKET_STOP_PRE_SIGKILL ||
1162 s->state == SOCKET_STOP_POST ||
1163 s->state == SOCKET_FINAL_SIGTERM ||
1164 s->state == SOCKET_FINAL_SIGTERM)
1167 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1169 socket_enter_stop_pre(s, true);
1173 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1174 Socket *s = SOCKET(u);
1182 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1183 unit_serialize_item(u, f, "failure", yes_no(s->failure));
1184 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1186 if (s->control_pid > 0)
1187 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1189 if (s->control_command_id >= 0)
1190 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1192 LIST_FOREACH(port, p, s->ports) {
1198 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1201 if (p->type == SOCKET_SOCKET) {
1204 if ((r = socket_address_print(&p->address, &t)) < 0)
1207 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1210 assert(p->type == SOCKET_FIFO);
1211 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1218 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1219 Socket *s = SOCKET(u);
1227 if (streq(key, "state")) {
1230 if ((state = socket_state_from_string(value)) < 0)
1231 log_debug("Failed to parse state value %s", value);
1233 s->deserialized_state = state;
1234 } else if (streq(key, "failure")) {
1237 if ((b = parse_boolean(value)) < 0)
1238 log_debug("Failed to parse failure value %s", value);
1240 s->failure = b || s->failure;
1242 } else if (streq(key, "n-accepted")) {
1245 if ((r = safe_atou(value, &k)) < 0)
1246 log_debug("Failed to parse n-accepted value %s", value);
1249 } else if (streq(key, "control-pid")) {
1252 if ((r = parse_pid(value, &pid)) < 0)
1253 log_debug("Failed to parse control-pid value %s", value);
1255 s->control_pid = pid;
1256 } else if (streq(key, "control-command")) {
1257 SocketExecCommand id;
1259 if ((id = socket_exec_command_from_string(value)) < 0)
1260 log_debug("Failed to parse exec-command value %s", value);
1262 s->control_command_id = id;
1263 s->control_command = s->exec_command[id];
1265 } else if (streq(key, "fifo")) {
1269 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1270 log_debug("Failed to parse fifo value %s", value);
1273 LIST_FOREACH(port, p, s->ports)
1274 if (streq(p->path, value+skip))
1279 close_nointr_nofail(p->fd);
1280 p->fd = fdset_remove(fds, fd);
1284 } else if (streq(key, "socket")) {
1285 int fd, type, skip = 0;
1288 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1289 log_debug("Failed to parse socket value %s", value);
1292 LIST_FOREACH(port, p, s->ports)
1293 if (socket_address_is(&p->address, value+skip, type))
1298 close_nointr_nofail(p->fd);
1299 p->fd = fdset_remove(fds, fd);
1304 log_debug("Unknown serialization key '%s'", key);
1309 static UnitActiveState socket_active_state(Unit *u) {
1312 return state_translation_table[SOCKET(u)->state];
1315 static const char *socket_sub_state_to_string(Unit *u) {
1318 return socket_state_to_string(SOCKET(u)->state);
1321 static bool socket_check_gc(Unit *u) {
1322 Socket *s = SOCKET(u);
1326 return s->n_connections > 0;
1329 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1330 Socket *s = SOCKET(u);
1336 if (s->state != SOCKET_LISTENING)
1339 log_debug("Incoming traffic on %s", u->meta.id);
1341 if (events != EPOLLIN) {
1342 log_error("Got invalid poll event on socket.");
1346 if (w->socket_accept) {
1349 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1354 log_error("Failed to accept socket: %m");
1361 socket_apply_socket_options(s, cfd);
1364 socket_enter_running(s, cfd);
1368 socket_enter_stop_pre(s, false);
1371 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1372 Socket *s = SOCKET(u);
1378 if (pid != s->control_pid)
1383 success = is_clean_exit(code, status);
1384 s->failure = s->failure || !success;
1386 if (s->control_command)
1387 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1389 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1391 if (s->control_command && s->control_command->command_next && success) {
1392 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1393 socket_run_next(s, success);
1395 s->control_command = NULL;
1396 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1398 /* No further commands for this step, so let's figure
1399 * out what to do next */
1401 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1405 case SOCKET_START_PRE:
1407 socket_enter_start_post(s);
1409 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1412 case SOCKET_START_POST:
1414 socket_enter_listening(s);
1416 socket_enter_stop_pre(s, false);
1419 case SOCKET_STOP_PRE:
1420 case SOCKET_STOP_PRE_SIGTERM:
1421 case SOCKET_STOP_PRE_SIGKILL:
1422 socket_enter_stop_post(s, success);
1425 case SOCKET_STOP_POST:
1426 case SOCKET_FINAL_SIGTERM:
1427 case SOCKET_FINAL_SIGKILL:
1428 socket_enter_dead(s, success);
1432 assert_not_reached("Uh, control process died at wrong time.");
1437 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1438 Socket *s = SOCKET(u);
1441 assert(elapsed == 1);
1442 assert(w == &s->timer_watch);
1446 case SOCKET_START_PRE:
1447 log_warning("%s starting timed out. Terminating.", u->meta.id);
1448 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1450 case SOCKET_START_POST:
1451 log_warning("%s starting timed out. Stopping.", u->meta.id);
1452 socket_enter_stop_pre(s, false);
1455 case SOCKET_STOP_PRE:
1456 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1457 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1460 case SOCKET_STOP_PRE_SIGTERM:
1461 log_warning("%s stopping timed out. Killing.", u->meta.id);
1462 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1465 case SOCKET_STOP_PRE_SIGKILL:
1466 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1467 socket_enter_stop_post(s, false);
1470 case SOCKET_STOP_POST:
1471 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1472 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1475 case SOCKET_FINAL_SIGTERM:
1476 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1477 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1480 case SOCKET_FINAL_SIGKILL:
1481 log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id);
1482 socket_enter_dead(s, false);
1486 assert_not_reached("Timeout at wrong time.");
1490 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1499 /* Called from the service code for requesting our fds */
1502 LIST_FOREACH(port, p, s->ports)
1506 if (!(rfds = new(int, rn_fds)) < 0)
1510 LIST_FOREACH(port, p, s->ports)
1514 assert(k == rn_fds);
1522 void socket_notify_service_dead(Socket *s) {
1525 /* The service is dead. Dang!
1527 * This is strictly for one-instance-for-all-connections
1530 if (s->state == SOCKET_RUNNING) {
1531 log_debug("%s got notified about service death.", s->meta.id);
1532 socket_enter_listening(s);
1536 void socket_connection_unref(Socket *s) {
1539 /* The service is dead. Yay!
1541 * This is strictly for one-onstance-per-connection
1544 assert(s->n_connections > 0);
1547 log_debug("%s: One connection closed, %u left.", s->meta.id, s->n_connections);
1550 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1551 [SOCKET_DEAD] = "dead",
1552 [SOCKET_START_PRE] = "start-pre",
1553 [SOCKET_START_POST] = "start-post",
1554 [SOCKET_LISTENING] = "listening",
1555 [SOCKET_RUNNING] = "running",
1556 [SOCKET_STOP_PRE] = "stop-pre",
1557 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1558 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1559 [SOCKET_STOP_POST] = "stop-post",
1560 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1561 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
1562 [SOCKET_MAINTENANCE] = "maintenance"
1565 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1567 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1568 [SOCKET_EXEC_START_PRE] = "StartPre",
1569 [SOCKET_EXEC_START_POST] = "StartPost",
1570 [SOCKET_EXEC_STOP_PRE] = "StopPre",
1571 [SOCKET_EXEC_STOP_POST] = "StopPost"
1574 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1576 const UnitVTable socket_vtable = {
1577 .suffix = ".socket",
1579 .init = socket_init,
1580 .done = socket_done,
1581 .load = socket_load,
1583 .coldplug = socket_coldplug,
1585 .dump = socket_dump,
1587 .start = socket_start,
1588 .stop = socket_stop,
1590 .serialize = socket_serialize,
1591 .deserialize_item = socket_deserialize_item,
1593 .active_state = socket_active_state,
1594 .sub_state_to_string = socket_sub_state_to_string,
1596 .check_gc = socket_check_gc,
1598 .fd_event = socket_fd_event,
1599 .sigchld_event = socket_sigchld_event,
1600 .timer_event = socket_timer_event,
1602 .bus_message_handler = bus_socket_message_handler