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"
40 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
41 [SOCKET_DEAD] = UNIT_INACTIVE,
42 [SOCKET_START_PRE] = UNIT_ACTIVATING,
43 [SOCKET_START_POST] = UNIT_ACTIVATING,
44 [SOCKET_LISTENING] = UNIT_ACTIVE,
45 [SOCKET_RUNNING] = UNIT_ACTIVE,
46 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
47 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
48 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
49 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
50 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
51 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
52 [SOCKET_MAINTAINANCE] = UNIT_INACTIVE,
55 static void socket_init(Unit *u) {
56 Socket *s = SOCKET(u);
59 assert(u->meta.load_state == UNIT_STUB);
61 s->timer_watch.type = WATCH_INVALID;
62 s->backlog = SOMAXCONN;
63 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
64 s->directory_mode = 0755;
65 s->socket_mode = 0666;
67 exec_context_init(&s->exec_context);
69 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
72 static void socket_unwatch_control_pid(Socket *s) {
75 if (s->control_pid <= 0)
78 unit_unwatch_pid(UNIT(s), s->control_pid);
82 static void socket_done(Unit *u) {
83 Socket *s = SOCKET(u);
88 while ((p = s->ports)) {
89 LIST_REMOVE(SocketPort, port, s->ports, p);
92 unit_unwatch_fd(UNIT(s), &p->fd_watch);
93 close_nointr_nofail(p->fd);
100 exec_context_done(&s->exec_context);
101 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
102 s->control_command = NULL;
104 socket_unwatch_control_pid(s);
108 free(s->bind_to_device);
109 s->bind_to_device = NULL;
111 unit_unwatch_timer(u, &s->timer_watch);
114 static bool have_non_accept_socket(Socket *s) {
122 LIST_FOREACH(port, p, s->ports)
123 if (!socket_address_can_accept(&p->address))
129 static int socket_verify(Socket *s) {
132 if (UNIT(s)->meta.load_state != UNIT_LOADED)
136 log_error("%s lacks Listen setting. Refusing.", UNIT(s)->meta.id);
143 static int socket_load(Unit *u) {
144 Socket *s = SOCKET(u);
148 assert(u->meta.load_state == UNIT_STUB);
150 if ((r = unit_load_fragment_and_dropin(u)) < 0)
153 /* This is a new unit? Then let's add in some extras */
154 if (u->meta.load_state == UNIT_LOADED) {
156 if (have_non_accept_socket(s)) {
157 if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)))
160 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
164 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
167 if ((r = unit_add_default_cgroup(u)) < 0)
171 return socket_verify(s);
174 static const char* listen_lookup(int type) {
176 if (type == SOCK_STREAM)
177 return "ListenStream";
178 else if (type == SOCK_DGRAM)
179 return "ListenDatagram";
180 else if (type == SOCK_SEQPACKET)
181 return "ListenSequentialPacket";
183 assert_not_reached("Unknown socket type");
187 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
190 Socket *s = SOCKET(u);
198 p2 = strappend(prefix, "\t");
199 prefix2 = p2 ? p2 : prefix;
202 "%sSocket State: %s\n"
203 "%sBindIPv6Only: %s\n"
206 "%sSocketMode: %04o\n"
207 "%sDirectoryMode: %04o\n",
208 prefix, socket_state_to_string(s->state),
209 prefix, yes_no(s->bind_ipv6_only),
211 prefix, kill_mode_to_string(s->kill_mode),
212 prefix, s->socket_mode,
213 prefix, s->directory_mode);
215 if (s->control_pid > 0)
217 "%sControl PID: %llu\n",
218 prefix, (unsigned long long) s->control_pid);
220 if (s->bind_to_device)
222 "%sBindToDevice: %s\n",
223 prefix, s->bind_to_device);
228 prefix, s->n_accepted);
230 LIST_FOREACH(port, p, s->ports) {
232 if (p->type == SOCKET_SOCKET) {
237 if ((r = socket_address_print(&p->address, &k)) < 0)
242 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
245 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
248 exec_context_dump(&s->exec_context, f, prefix);
250 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
251 if (!s->exec_command[c])
254 fprintf(f, "%s-> %s:\n",
255 prefix, socket_exec_command_to_string(c));
257 exec_command_dump_list(s->exec_command[c], f, prefix2);
263 static int instance_from_socket(int fd, unsigned nr, char **instance) {
268 struct sockaddr_un un;
269 struct sockaddr_in in;
270 struct sockaddr_in6 in6;
271 struct sockaddr_storage storage;
278 if (getsockname(fd, &local.sa, &l) < 0)
282 if (getpeername(fd, &remote.sa, &l) < 0)
285 switch (local.sa.sa_family) {
289 a = ntohl(local.in.sin_addr.s_addr),
290 b = ntohl(remote.in.sin_addr.s_addr);
293 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
295 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
296 ntohs(local.in.sin_port),
297 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
298 ntohs(remote.in.sin_port)) < 0)
305 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
310 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
311 ntohs(local.in6.sin6_port),
312 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
313 ntohs(remote.in6.sin6_port)) < 0)
323 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
329 (unsigned long long) ucred.pid,
330 (unsigned long long) ucred.uid) < 0)
337 assert_not_reached("Unhandled socket type.");
344 static void socket_close_fds(Socket *s) {
349 LIST_FOREACH(port, p, s->ports) {
353 unit_unwatch_fd(UNIT(s), &p->fd_watch);
354 close_nointr_nofail(p->fd);
356 /* One little note: we should never delete any sockets
357 * in the file system here! After all some other
358 * process we spawned might still have a reference of
359 * this fd and wants to continue to use it. Therefore
360 * we delete sockets in the file system before we
361 * create a new one, not after we stopped using
368 static int socket_open_fds(Socket *s) {
374 LIST_FOREACH(port, p, s->ports) {
379 if (p->type == SOCKET_SOCKET) {
381 if ((r = socket_address_listen(
393 assert(p->type == SOCKET_FIFO);
395 mkdir_parents(p->path, s->directory_mode);
397 if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
402 if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
407 if (fstat(p->fd, &st) < 0) {
412 /* FIXME verify user, access mode */
414 if (!S_ISFIFO(st.st_mode)) {
428 static void socket_unwatch_fds(Socket *s) {
433 LIST_FOREACH(port, p, s->ports) {
437 unit_unwatch_fd(UNIT(s), &p->fd_watch);
441 static int socket_watch_fds(Socket *s) {
447 LIST_FOREACH(port, p, s->ports) {
451 p->fd_watch.data.socket_accept =
453 socket_address_can_accept(&p->address);
455 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
462 socket_unwatch_fds(s);
466 static void socket_set_state(Socket *s, SocketState state) {
467 SocketState old_state;
470 old_state = s->state;
473 if (state != SOCKET_START_PRE &&
474 state != SOCKET_START_POST &&
475 state != SOCKET_STOP_PRE &&
476 state != SOCKET_STOP_PRE_SIGTERM &&
477 state != SOCKET_STOP_PRE_SIGKILL &&
478 state != SOCKET_STOP_POST &&
479 state != SOCKET_FINAL_SIGTERM &&
480 state != SOCKET_FINAL_SIGKILL) {
481 unit_unwatch_timer(UNIT(s), &s->timer_watch);
482 socket_unwatch_control_pid(s);
483 s->control_command = NULL;
484 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
487 if (state != SOCKET_LISTENING)
488 socket_unwatch_fds(s);
490 if (state != SOCKET_START_POST &&
491 state != SOCKET_LISTENING &&
492 state != SOCKET_RUNNING &&
493 state != SOCKET_STOP_PRE &&
494 state != SOCKET_STOP_PRE_SIGTERM &&
495 state != SOCKET_STOP_PRE_SIGKILL)
498 if (state != old_state)
499 log_debug("%s changed %s -> %s",
501 socket_state_to_string(old_state),
502 socket_state_to_string(state));
504 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
507 static int socket_coldplug(Unit *u) {
508 Socket *s = SOCKET(u);
512 assert(s->state == SOCKET_DEAD);
514 if (s->deserialized_state != s->state) {
516 if (s->deserialized_state == SOCKET_START_PRE ||
517 s->deserialized_state == SOCKET_START_POST ||
518 s->deserialized_state == SOCKET_STOP_PRE ||
519 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
520 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
521 s->deserialized_state == SOCKET_STOP_POST ||
522 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
523 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
525 if (s->control_pid <= 0)
528 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
531 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
535 if (s->deserialized_state == SOCKET_START_POST ||
536 s->deserialized_state == SOCKET_LISTENING ||
537 s->deserialized_state == SOCKET_RUNNING ||
538 s->deserialized_state == SOCKET_STOP_PRE ||
539 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
540 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
541 if ((r = socket_open_fds(s)) < 0)
544 if (s->deserialized_state == SOCKET_LISTENING)
545 if ((r = socket_watch_fds(s)) < 0)
548 socket_set_state(s, s->deserialized_state);
554 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
563 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
566 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
577 UNIT(s)->meta.manager->confirm_spawn,
578 UNIT(s)->meta.cgroup_bondings,
585 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
586 /* FIXME: we need to do something here */
594 unit_unwatch_timer(UNIT(s), &s->timer_watch);
599 static void socket_enter_dead(Socket *s, bool success) {
605 socket_set_state(s, s->failure ? SOCKET_MAINTAINANCE : SOCKET_DEAD);
608 static void socket_enter_signal(Socket *s, SocketState state, bool success);
610 static void socket_enter_stop_post(Socket *s, bool success) {
617 socket_unwatch_control_pid(s);
619 s->control_command_id = SOCKET_EXEC_STOP_POST;
621 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
622 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
625 socket_set_state(s, SOCKET_STOP_POST);
627 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
632 log_warning("%s failed to run stop-post executable: %s", s->meta.id, strerror(-r));
633 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
636 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
645 if (s->kill_mode != KILL_NONE) {
646 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
648 if (s->kill_mode == KILL_CONTROL_GROUP) {
650 if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
651 if (r != -EAGAIN && r != -ESRCH)
657 if (!sent && s->control_pid > 0)
658 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
665 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
668 socket_set_state(s, state);
669 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
670 socket_enter_stop_post(s, true);
672 socket_enter_dead(s, true);
677 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
679 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
680 socket_enter_stop_post(s, false);
682 socket_enter_dead(s, false);
685 static void socket_enter_stop_pre(Socket *s, bool success) {
692 socket_unwatch_control_pid(s);
694 s->control_command_id = SOCKET_EXEC_STOP_PRE;
696 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
697 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
700 socket_set_state(s, SOCKET_STOP_PRE);
702 socket_enter_stop_post(s, true);
707 log_warning("%s failed to run stop-pre executable: %s", s->meta.id, strerror(-r));
708 socket_enter_stop_post(s, false);
711 static void socket_enter_listening(Socket *s) {
715 if ((r = socket_watch_fds(s)) < 0) {
716 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
720 socket_set_state(s, SOCKET_LISTENING);
724 socket_enter_stop_pre(s, false);
727 static void socket_enter_start_post(Socket *s) {
731 if ((r = socket_open_fds(s)) < 0) {
732 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
736 socket_unwatch_control_pid(s);
738 s->control_command_id = SOCKET_EXEC_START_POST;
740 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
741 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
742 log_warning("%s failed to run start-post executable: %s", s->meta.id, strerror(-r));
746 socket_set_state(s, SOCKET_START_POST);
748 socket_enter_listening(s);
753 socket_enter_stop_pre(s, false);
756 static void socket_enter_start_pre(Socket *s) {
760 socket_unwatch_control_pid(s);
762 s->control_command_id = SOCKET_EXEC_START_PRE;
764 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
765 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
768 socket_set_state(s, SOCKET_START_PRE);
770 socket_enter_start_post(s);
775 log_warning("%s failed to run start-pre exectuable: %s", s->meta.id, strerror(-r));
776 socket_enter_dead(s, false);
779 static void socket_enter_running(Socket *s, int cfd) {
785 if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
788 socket_set_state(s, SOCKET_RUNNING);
791 char *prefix, *instance, *name;
793 if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)))
796 if (!(prefix = unit_name_to_prefix(UNIT(s)->meta.id))) {
802 name = unit_name_build(prefix, instance, ".service");
809 r = manager_load_unit(UNIT(s)->meta.manager, name, NULL, &u);
815 if ((r = service_set_socket_fd(SERVICE(u), cfd) < 0))
820 if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, NULL)) < 0)
827 log_warning("%s failed to queue socket startup job: %s", s->meta.id, strerror(-r));
828 socket_enter_stop_pre(s, false);
831 close_nointr_nofail(cfd);
834 static void socket_run_next(Socket *s, bool success) {
838 assert(s->control_command);
839 assert(s->control_command->command_next);
844 socket_unwatch_control_pid(s);
846 s->control_command = s->control_command->command_next;
848 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
854 log_warning("%s failed to run spawn next executable: %s", s->meta.id, strerror(-r));
856 if (s->state == SOCKET_START_POST)
857 socket_enter_stop_pre(s, false);
858 else if (s->state == SOCKET_STOP_POST)
859 socket_enter_dead(s, false);
861 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
864 static int socket_start(Unit *u) {
865 Socket *s = SOCKET(u);
869 /* We cannot fulfill this request right now, try again later
871 if (s->state == SOCKET_STOP_PRE ||
872 s->state == SOCKET_STOP_PRE_SIGKILL ||
873 s->state == SOCKET_STOP_PRE_SIGTERM ||
874 s->state == SOCKET_STOP_POST ||
875 s->state == SOCKET_FINAL_SIGTERM ||
876 s->state == SOCKET_FINAL_SIGKILL)
879 if (s->state == SOCKET_START_PRE ||
880 s->state == SOCKET_START_POST)
883 /* Cannot run this without the service being around */
885 if (s->service->meta.load_state != UNIT_LOADED)
888 /* If the service is alredy actvie we cannot start the
890 if (s->service->state != SERVICE_DEAD &&
891 s->service->state != SERVICE_MAINTAINANCE &&
892 s->service->state != SERVICE_AUTO_RESTART)
896 assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTAINANCE);
899 socket_enter_start_pre(s);
903 static int socket_stop(Unit *u) {
904 Socket *s = SOCKET(u);
908 /* We cannot fulfill this request right now, try again later
910 if (s->state == SOCKET_START_PRE ||
911 s->state == SOCKET_START_POST)
915 if (s->state == SOCKET_STOP_PRE ||
916 s->state == SOCKET_STOP_PRE_SIGTERM ||
917 s->state == SOCKET_STOP_PRE_SIGKILL ||
918 s->state == SOCKET_STOP_POST ||
919 s->state == SOCKET_FINAL_SIGTERM ||
920 s->state == SOCKET_FINAL_SIGTERM)
923 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
925 socket_enter_stop_pre(s, true);
929 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
930 Socket *s = SOCKET(u);
938 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
939 unit_serialize_item(u, f, "failure", yes_no(s->failure));
940 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
942 if (s->control_pid > 0)
943 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) s->control_pid);
945 if (s->control_command_id >= 0)
946 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
948 LIST_FOREACH(port, p, s->ports) {
954 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
957 if (p->type == SOCKET_SOCKET) {
960 if ((r = socket_address_print(&p->address, &t)) < 0)
963 unit_serialize_item_format(u, f, "socket", "%i %s", copy, t);
966 assert(p->type == SOCKET_FIFO);
967 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
974 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
975 Socket *s = SOCKET(u);
983 if (streq(key, "state")) {
986 if ((state = socket_state_from_string(value)) < 0)
987 log_debug("Failed to parse state value %s", value);
989 s->deserialized_state = state;
990 } else if (streq(key, "failure")) {
993 if ((b = parse_boolean(value)) < 0)
994 log_debug("Failed to parse failure value %s", value);
996 s->failure = b || s->failure;
998 } else if (streq(key, "n-accepted")) {
1001 if ((r = safe_atou(value, &k)) < 0)
1002 log_debug("Failed to parse n-accepted value %s", value);
1005 } else if (streq(key, "control-pid")) {
1008 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1009 log_debug("Failed to parse control-pid value %s", value);
1011 s->control_pid = (pid_t) pid;
1012 } else if (streq(key, "control-command")) {
1013 SocketExecCommand id;
1015 if ((id = socket_exec_command_from_string(value)) < 0)
1016 log_debug("Failed to parse exec-command value %s", value);
1018 s->control_command_id = id;
1019 s->control_command = s->exec_command[id];
1021 } else if (streq(key, "fifo")) {
1025 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1026 log_debug("Failed to parse fifo value %s", value);
1029 LIST_FOREACH(port, p, s->ports)
1030 if (streq(p->path, value+skip))
1035 close_nointr_nofail(p->fd);
1036 p->fd = fdset_remove(fds, fd);
1040 } else if (streq(key, "socket")) {
1044 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1045 log_debug("Failed to parse socket value %s", value);
1048 LIST_FOREACH(port, p, s->ports)
1049 if (socket_address_is(&p->address, value+skip))
1054 close_nointr_nofail(p->fd);
1055 p->fd = fdset_remove(fds, fd);
1060 log_debug("Unknown serialization key '%s'", key);
1065 static UnitActiveState socket_active_state(Unit *u) {
1068 return state_translation_table[SOCKET(u)->state];
1071 static const char *socket_sub_state_to_string(Unit *u) {
1074 return socket_state_to_string(SOCKET(u)->state);
1077 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1078 Socket *s = SOCKET(u);
1084 log_debug("Incoming traffic on %s", u->meta.id);
1086 if (events != EPOLLIN) {
1087 log_error("Got invalid poll event on socket.");
1091 if (w->data.socket_accept) {
1094 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1099 log_error("Failed to accept socket: %m");
1107 log_debug("cfd=%i", cfd);
1108 socket_enter_running(s, cfd);
1112 socket_enter_stop_pre(s, false);
1115 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1116 Socket *s = SOCKET(u);
1122 success = code == CLD_EXITED && status == 0;
1123 s->failure = s->failure || !success;
1125 assert(s->control_pid == pid);
1128 if (s->control_command)
1129 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1131 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1133 if (s->control_command && s->control_command->command_next && success) {
1134 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1135 socket_run_next(s, success);
1137 s->control_command = NULL;
1138 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1140 /* No further commands for this step, so let's figure
1141 * out what to do next */
1143 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1147 case SOCKET_START_PRE:
1149 socket_enter_start_post(s);
1151 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1154 case SOCKET_START_POST:
1156 socket_enter_listening(s);
1158 socket_enter_stop_pre(s, false);
1161 case SOCKET_STOP_PRE:
1162 case SOCKET_STOP_PRE_SIGTERM:
1163 case SOCKET_STOP_PRE_SIGKILL:
1164 socket_enter_stop_post(s, success);
1167 case SOCKET_STOP_POST:
1168 case SOCKET_FINAL_SIGTERM:
1169 case SOCKET_FINAL_SIGKILL:
1170 socket_enter_dead(s, success);
1174 assert_not_reached("Uh, control process died at wrong time.");
1179 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1180 Socket *s = SOCKET(u);
1183 assert(elapsed == 1);
1184 assert(w == &s->timer_watch);
1188 case SOCKET_START_PRE:
1189 log_warning("%s starting timed out. Terminating.", u->meta.id);
1190 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1192 case SOCKET_START_POST:
1193 log_warning("%s starting timed out. Stopping.", u->meta.id);
1194 socket_enter_stop_pre(s, false);
1197 case SOCKET_STOP_PRE:
1198 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1199 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1202 case SOCKET_STOP_PRE_SIGTERM:
1203 log_warning("%s stopping timed out. Killing.", u->meta.id);
1204 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1207 case SOCKET_STOP_PRE_SIGKILL:
1208 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1209 socket_enter_stop_post(s, false);
1212 case SOCKET_STOP_POST:
1213 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1214 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1217 case SOCKET_FINAL_SIGTERM:
1218 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1219 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1222 case SOCKET_FINAL_SIGKILL:
1223 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u->meta.id);
1224 socket_enter_dead(s, false);
1228 assert_not_reached("Timeout at wrong time.");
1232 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1241 /* Called from the service code for requesting our fds */
1244 LIST_FOREACH(port, p, s->ports)
1248 if (!(rfds = new(int, rn_fds)) < 0)
1252 LIST_FOREACH(port, p, s->ports)
1256 assert(k == rn_fds);
1264 void socket_notify_service_dead(Socket *s) {
1267 /* The service is dead. Dang. */
1269 if (s->state == SOCKET_RUNNING) {
1270 log_debug("%s got notified about service death.", s->meta.id);
1271 socket_enter_listening(s);
1275 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1276 [SOCKET_DEAD] = "dead",
1277 [SOCKET_START_PRE] = "start-pre",
1278 [SOCKET_START_POST] = "start-post",
1279 [SOCKET_LISTENING] = "listening",
1280 [SOCKET_RUNNING] = "running",
1281 [SOCKET_STOP_PRE] = "stop-pre",
1282 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1283 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1284 [SOCKET_STOP_POST] = "stop-post",
1285 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1286 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
1287 [SOCKET_MAINTAINANCE] = "maintainance"
1290 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1292 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1293 [SOCKET_EXEC_START_PRE] = "StartPre",
1294 [SOCKET_EXEC_START_POST] = "StartPost",
1295 [SOCKET_EXEC_STOP_PRE] = "StopPre",
1296 [SOCKET_EXEC_STOP_POST] = "StopPost"
1299 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1301 const UnitVTable socket_vtable = {
1302 .suffix = ".socket",
1304 .init = socket_init,
1305 .done = socket_done,
1306 .load = socket_load,
1308 .coldplug = socket_coldplug,
1310 .dump = socket_dump,
1312 .start = socket_start,
1313 .stop = socket_stop,
1315 .serialize = socket_serialize,
1316 .deserialize_item = socket_deserialize_item,
1318 .active_state = socket_active_state,
1319 .sub_state_to_string = socket_sub_state_to_string,
1321 .fd_event = socket_fd_event,
1322 .sigchld_event = socket_sigchld_event,
1323 .timer_event = socket_timer_event,
1325 .bus_message_handler = bus_socket_message_handler