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) {
124 if (p->type != SOCKET_SOCKET)
127 if (!socket_address_can_accept(&p->address))
134 static int socket_verify(Socket *s) {
137 if (UNIT(s)->meta.load_state != UNIT_LOADED)
141 log_error("%s lacks Listen setting. Refusing.", UNIT(s)->meta.id);
148 static int socket_load(Unit *u) {
149 Socket *s = SOCKET(u);
153 assert(u->meta.load_state == UNIT_STUB);
155 if ((r = unit_load_fragment_and_dropin(u)) < 0)
158 /* This is a new unit? Then let's add in some extras */
159 if (u->meta.load_state == UNIT_LOADED) {
161 if (have_non_accept_socket(s)) {
162 if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)))
165 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
169 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
172 if ((r = unit_add_default_cgroup(u)) < 0)
176 return socket_verify(s);
179 static const char* listen_lookup(int type) {
181 if (type == SOCK_STREAM)
182 return "ListenStream";
183 else if (type == SOCK_DGRAM)
184 return "ListenDatagram";
185 else if (type == SOCK_SEQPACKET)
186 return "ListenSequentialPacket";
188 assert_not_reached("Unknown socket type");
192 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
195 Socket *s = SOCKET(u);
203 p2 = strappend(prefix, "\t");
204 prefix2 = p2 ? p2 : prefix;
207 "%sSocket State: %s\n"
208 "%sBindIPv6Only: %s\n"
211 "%sSocketMode: %04o\n"
212 "%sDirectoryMode: %04o\n",
213 prefix, socket_state_to_string(s->state),
214 prefix, yes_no(s->bind_ipv6_only),
216 prefix, kill_mode_to_string(s->kill_mode),
217 prefix, s->socket_mode,
218 prefix, s->directory_mode);
220 if (s->control_pid > 0)
222 "%sControl PID: %llu\n",
223 prefix, (unsigned long long) s->control_pid);
225 if (s->bind_to_device)
227 "%sBindToDevice: %s\n",
228 prefix, s->bind_to_device);
233 prefix, s->n_accepted);
235 LIST_FOREACH(port, p, s->ports) {
237 if (p->type == SOCKET_SOCKET) {
242 if ((r = socket_address_print(&p->address, &k)) < 0)
247 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
250 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
253 exec_context_dump(&s->exec_context, f, prefix);
255 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
256 if (!s->exec_command[c])
259 fprintf(f, "%s-> %s:\n",
260 prefix, socket_exec_command_to_string(c));
262 exec_command_dump_list(s->exec_command[c], f, prefix2);
268 static int instance_from_socket(int fd, unsigned nr, char **instance) {
273 struct sockaddr_un un;
274 struct sockaddr_in in;
275 struct sockaddr_in6 in6;
276 struct sockaddr_storage storage;
283 if (getsockname(fd, &local.sa, &l) < 0)
287 if (getpeername(fd, &remote.sa, &l) < 0)
290 switch (local.sa.sa_family) {
294 a = ntohl(local.in.sin_addr.s_addr),
295 b = ntohl(remote.in.sin_addr.s_addr);
298 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
300 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
301 ntohs(local.in.sin_port),
302 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
303 ntohs(remote.in.sin_port)) < 0)
310 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
315 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
316 ntohs(local.in6.sin6_port),
317 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
318 ntohs(remote.in6.sin6_port)) < 0)
328 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
334 (unsigned long long) ucred.pid,
335 (unsigned long long) ucred.uid) < 0)
342 assert_not_reached("Unhandled socket type.");
349 static void socket_close_fds(Socket *s) {
354 LIST_FOREACH(port, p, s->ports) {
358 unit_unwatch_fd(UNIT(s), &p->fd_watch);
359 close_nointr_nofail(p->fd);
361 /* One little note: we should never delete any sockets
362 * in the file system here! After all some other
363 * process we spawned might still have a reference of
364 * this fd and wants to continue to use it. Therefore
365 * we delete sockets in the file system before we
366 * create a new one, not after we stopped using
373 static int socket_open_fds(Socket *s) {
379 LIST_FOREACH(port, p, s->ports) {
384 if (p->type == SOCKET_SOCKET) {
386 if ((r = socket_address_listen(
398 assert(p->type == SOCKET_FIFO);
400 mkdir_parents(p->path, s->directory_mode);
402 if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
407 if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
412 if (fstat(p->fd, &st) < 0) {
417 /* FIXME verify user, access mode */
419 if (!S_ISFIFO(st.st_mode)) {
433 static void socket_unwatch_fds(Socket *s) {
438 LIST_FOREACH(port, p, s->ports) {
442 unit_unwatch_fd(UNIT(s), &p->fd_watch);
446 static int socket_watch_fds(Socket *s) {
452 LIST_FOREACH(port, p, s->ports) {
456 p->fd_watch.socket_accept =
458 p->type == SOCKET_SOCKET &&
459 socket_address_can_accept(&p->address);
461 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
468 socket_unwatch_fds(s);
472 static void socket_set_state(Socket *s, SocketState state) {
473 SocketState old_state;
476 old_state = s->state;
479 if (state != SOCKET_START_PRE &&
480 state != SOCKET_START_POST &&
481 state != SOCKET_STOP_PRE &&
482 state != SOCKET_STOP_PRE_SIGTERM &&
483 state != SOCKET_STOP_PRE_SIGKILL &&
484 state != SOCKET_STOP_POST &&
485 state != SOCKET_FINAL_SIGTERM &&
486 state != SOCKET_FINAL_SIGKILL) {
487 unit_unwatch_timer(UNIT(s), &s->timer_watch);
488 socket_unwatch_control_pid(s);
489 s->control_command = NULL;
490 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
493 if (state != SOCKET_LISTENING)
494 socket_unwatch_fds(s);
496 if (state != SOCKET_START_POST &&
497 state != SOCKET_LISTENING &&
498 state != SOCKET_RUNNING &&
499 state != SOCKET_STOP_PRE &&
500 state != SOCKET_STOP_PRE_SIGTERM &&
501 state != SOCKET_STOP_PRE_SIGKILL)
504 if (state != old_state)
505 log_debug("%s changed %s -> %s",
507 socket_state_to_string(old_state),
508 socket_state_to_string(state));
510 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
513 static int socket_coldplug(Unit *u) {
514 Socket *s = SOCKET(u);
518 assert(s->state == SOCKET_DEAD);
520 if (s->deserialized_state != s->state) {
522 if (s->deserialized_state == SOCKET_START_PRE ||
523 s->deserialized_state == SOCKET_START_POST ||
524 s->deserialized_state == SOCKET_STOP_PRE ||
525 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
526 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
527 s->deserialized_state == SOCKET_STOP_POST ||
528 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
529 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
531 if (s->control_pid <= 0)
534 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
537 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
541 if (s->deserialized_state == SOCKET_START_POST ||
542 s->deserialized_state == SOCKET_LISTENING ||
543 s->deserialized_state == SOCKET_RUNNING ||
544 s->deserialized_state == SOCKET_STOP_PRE ||
545 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
546 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
547 if ((r = socket_open_fds(s)) < 0)
550 if (s->deserialized_state == SOCKET_LISTENING)
551 if ((r = socket_watch_fds(s)) < 0)
554 socket_set_state(s, s->deserialized_state);
560 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
569 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
572 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
583 UNIT(s)->meta.manager->confirm_spawn,
584 UNIT(s)->meta.cgroup_bondings,
591 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
592 /* FIXME: we need to do something here */
600 unit_unwatch_timer(UNIT(s), &s->timer_watch);
605 static void socket_enter_dead(Socket *s, bool success) {
611 socket_set_state(s, s->failure ? SOCKET_MAINTAINANCE : SOCKET_DEAD);
614 static void socket_enter_signal(Socket *s, SocketState state, bool success);
616 static void socket_enter_stop_post(Socket *s, bool success) {
623 socket_unwatch_control_pid(s);
625 s->control_command_id = SOCKET_EXEC_STOP_POST;
627 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
628 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
631 socket_set_state(s, SOCKET_STOP_POST);
633 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
638 log_warning("%s failed to run stop-post executable: %s", s->meta.id, strerror(-r));
639 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
642 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
651 if (s->kill_mode != KILL_NONE) {
652 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
654 if (s->kill_mode == KILL_CONTROL_GROUP) {
656 if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
657 if (r != -EAGAIN && r != -ESRCH)
663 if (!sent && s->control_pid > 0)
664 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
670 if (sent && s->control_pid > 0) {
671 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
674 socket_set_state(s, state);
675 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
676 socket_enter_stop_post(s, true);
678 socket_enter_dead(s, true);
683 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
685 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
686 socket_enter_stop_post(s, false);
688 socket_enter_dead(s, false);
691 static void socket_enter_stop_pre(Socket *s, bool success) {
698 socket_unwatch_control_pid(s);
700 s->control_command_id = SOCKET_EXEC_STOP_PRE;
702 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
703 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
706 socket_set_state(s, SOCKET_STOP_PRE);
708 socket_enter_stop_post(s, true);
713 log_warning("%s failed to run stop-pre executable: %s", s->meta.id, strerror(-r));
714 socket_enter_stop_post(s, false);
717 static void socket_enter_listening(Socket *s) {
721 if ((r = socket_watch_fds(s)) < 0) {
722 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
726 socket_set_state(s, SOCKET_LISTENING);
730 socket_enter_stop_pre(s, false);
733 static void socket_enter_start_post(Socket *s) {
737 if ((r = socket_open_fds(s)) < 0) {
738 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
742 socket_unwatch_control_pid(s);
744 s->control_command_id = SOCKET_EXEC_START_POST;
746 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
747 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
748 log_warning("%s failed to run start-post executable: %s", s->meta.id, strerror(-r));
752 socket_set_state(s, SOCKET_START_POST);
754 socket_enter_listening(s);
759 socket_enter_stop_pre(s, false);
762 static void socket_enter_start_pre(Socket *s) {
766 socket_unwatch_control_pid(s);
768 s->control_command_id = SOCKET_EXEC_START_PRE;
770 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
771 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
774 socket_set_state(s, SOCKET_START_PRE);
776 socket_enter_start_post(s);
781 log_warning("%s failed to run start-pre exectuable: %s", s->meta.id, strerror(-r));
782 socket_enter_dead(s, false);
785 static void socket_enter_running(Socket *s, int cfd) {
791 if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
794 socket_set_state(s, SOCKET_RUNNING);
797 char *prefix, *instance, *name;
799 if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)))
802 if (!(prefix = unit_name_to_prefix(UNIT(s)->meta.id))) {
808 name = unit_name_build(prefix, instance, ".service");
815 r = manager_load_unit(UNIT(s)->meta.manager, name, NULL, &u);
821 if ((r = service_set_socket_fd(SERVICE(u), cfd) < 0))
826 if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, NULL)) < 0)
833 log_warning("%s failed to queue socket startup job: %s", s->meta.id, strerror(-r));
834 socket_enter_stop_pre(s, false);
837 close_nointr_nofail(cfd);
840 static void socket_run_next(Socket *s, bool success) {
844 assert(s->control_command);
845 assert(s->control_command->command_next);
850 socket_unwatch_control_pid(s);
852 s->control_command = s->control_command->command_next;
854 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
860 log_warning("%s failed to run spawn next executable: %s", s->meta.id, strerror(-r));
862 if (s->state == SOCKET_START_POST)
863 socket_enter_stop_pre(s, false);
864 else if (s->state == SOCKET_STOP_POST)
865 socket_enter_dead(s, false);
867 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
870 static int socket_start(Unit *u) {
871 Socket *s = SOCKET(u);
875 /* We cannot fulfill this request right now, try again later
877 if (s->state == SOCKET_STOP_PRE ||
878 s->state == SOCKET_STOP_PRE_SIGKILL ||
879 s->state == SOCKET_STOP_PRE_SIGTERM ||
880 s->state == SOCKET_STOP_POST ||
881 s->state == SOCKET_FINAL_SIGTERM ||
882 s->state == SOCKET_FINAL_SIGKILL)
885 if (s->state == SOCKET_START_PRE ||
886 s->state == SOCKET_START_POST)
889 /* Cannot run this without the service being around */
891 if (s->service->meta.load_state != UNIT_LOADED)
894 /* If the service is alredy actvie we cannot start the
896 if (s->service->state != SERVICE_DEAD &&
897 s->service->state != SERVICE_MAINTAINANCE &&
898 s->service->state != SERVICE_AUTO_RESTART)
902 assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTAINANCE);
905 socket_enter_start_pre(s);
909 static int socket_stop(Unit *u) {
910 Socket *s = SOCKET(u);
914 /* We cannot fulfill this request right now, try again later
916 if (s->state == SOCKET_START_PRE ||
917 s->state == SOCKET_START_POST)
921 if (s->state == SOCKET_STOP_PRE ||
922 s->state == SOCKET_STOP_PRE_SIGTERM ||
923 s->state == SOCKET_STOP_PRE_SIGKILL ||
924 s->state == SOCKET_STOP_POST ||
925 s->state == SOCKET_FINAL_SIGTERM ||
926 s->state == SOCKET_FINAL_SIGTERM)
929 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
931 socket_enter_stop_pre(s, true);
935 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
936 Socket *s = SOCKET(u);
944 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
945 unit_serialize_item(u, f, "failure", yes_no(s->failure));
946 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
948 if (s->control_pid > 0)
949 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) s->control_pid);
951 if (s->control_command_id >= 0)
952 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
954 LIST_FOREACH(port, p, s->ports) {
960 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
963 if (p->type == SOCKET_SOCKET) {
966 if ((r = socket_address_print(&p->address, &t)) < 0)
969 unit_serialize_item_format(u, f, "socket", "%i %s", copy, t);
972 assert(p->type == SOCKET_FIFO);
973 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
980 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
981 Socket *s = SOCKET(u);
989 if (streq(key, "state")) {
992 if ((state = socket_state_from_string(value)) < 0)
993 log_debug("Failed to parse state value %s", value);
995 s->deserialized_state = state;
996 } else if (streq(key, "failure")) {
999 if ((b = parse_boolean(value)) < 0)
1000 log_debug("Failed to parse failure value %s", value);
1002 s->failure = b || s->failure;
1004 } else if (streq(key, "n-accepted")) {
1007 if ((r = safe_atou(value, &k)) < 0)
1008 log_debug("Failed to parse n-accepted value %s", value);
1011 } else if (streq(key, "control-pid")) {
1014 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1015 log_debug("Failed to parse control-pid value %s", value);
1017 s->control_pid = (pid_t) pid;
1018 } else if (streq(key, "control-command")) {
1019 SocketExecCommand id;
1021 if ((id = socket_exec_command_from_string(value)) < 0)
1022 log_debug("Failed to parse exec-command value %s", value);
1024 s->control_command_id = id;
1025 s->control_command = s->exec_command[id];
1027 } else if (streq(key, "fifo")) {
1031 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1032 log_debug("Failed to parse fifo value %s", value);
1035 LIST_FOREACH(port, p, s->ports)
1036 if (streq(p->path, value+skip))
1041 close_nointr_nofail(p->fd);
1042 p->fd = fdset_remove(fds, fd);
1046 } else if (streq(key, "socket")) {
1050 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1051 log_debug("Failed to parse socket value %s", value);
1054 LIST_FOREACH(port, p, s->ports)
1055 if (socket_address_is(&p->address, value+skip))
1060 close_nointr_nofail(p->fd);
1061 p->fd = fdset_remove(fds, fd);
1066 log_debug("Unknown serialization key '%s'", key);
1071 static UnitActiveState socket_active_state(Unit *u) {
1074 return state_translation_table[SOCKET(u)->state];
1077 static const char *socket_sub_state_to_string(Unit *u) {
1080 return socket_state_to_string(SOCKET(u)->state);
1083 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1084 Socket *s = SOCKET(u);
1090 log_debug("Incoming traffic on %s", u->meta.id);
1092 if (events != EPOLLIN) {
1093 log_error("Got invalid poll event on socket.");
1097 if (w->socket_accept) {
1100 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1105 log_error("Failed to accept socket: %m");
1113 socket_enter_running(s, cfd);
1117 socket_enter_stop_pre(s, false);
1120 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1121 Socket *s = SOCKET(u);
1127 success = code == CLD_EXITED && status == 0;
1128 s->failure = s->failure || !success;
1130 assert(s->control_pid == pid);
1133 if (s->control_command)
1134 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1136 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1138 if (s->control_command && s->control_command->command_next && success) {
1139 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1140 socket_run_next(s, success);
1142 s->control_command = NULL;
1143 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1145 /* No further commands for this step, so let's figure
1146 * out what to do next */
1148 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1152 case SOCKET_START_PRE:
1154 socket_enter_start_post(s);
1156 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1159 case SOCKET_START_POST:
1161 socket_enter_listening(s);
1163 socket_enter_stop_pre(s, false);
1166 case SOCKET_STOP_PRE:
1167 case SOCKET_STOP_PRE_SIGTERM:
1168 case SOCKET_STOP_PRE_SIGKILL:
1169 socket_enter_stop_post(s, success);
1172 case SOCKET_STOP_POST:
1173 case SOCKET_FINAL_SIGTERM:
1174 case SOCKET_FINAL_SIGKILL:
1175 socket_enter_dead(s, success);
1179 assert_not_reached("Uh, control process died at wrong time.");
1184 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1185 Socket *s = SOCKET(u);
1188 assert(elapsed == 1);
1189 assert(w == &s->timer_watch);
1193 case SOCKET_START_PRE:
1194 log_warning("%s starting timed out. Terminating.", u->meta.id);
1195 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1197 case SOCKET_START_POST:
1198 log_warning("%s starting timed out. Stopping.", u->meta.id);
1199 socket_enter_stop_pre(s, false);
1202 case SOCKET_STOP_PRE:
1203 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1204 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1207 case SOCKET_STOP_PRE_SIGTERM:
1208 log_warning("%s stopping timed out. Killing.", u->meta.id);
1209 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1212 case SOCKET_STOP_PRE_SIGKILL:
1213 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1214 socket_enter_stop_post(s, false);
1217 case SOCKET_STOP_POST:
1218 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1219 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1222 case SOCKET_FINAL_SIGTERM:
1223 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1224 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1227 case SOCKET_FINAL_SIGKILL:
1228 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u->meta.id);
1229 socket_enter_dead(s, false);
1233 assert_not_reached("Timeout at wrong time.");
1237 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1246 /* Called from the service code for requesting our fds */
1249 LIST_FOREACH(port, p, s->ports)
1253 if (!(rfds = new(int, rn_fds)) < 0)
1257 LIST_FOREACH(port, p, s->ports)
1261 assert(k == rn_fds);
1269 void socket_notify_service_dead(Socket *s) {
1272 /* The service is dead. Dang. */
1274 if (s->state == SOCKET_RUNNING) {
1275 log_debug("%s got notified about service death.", s->meta.id);
1276 socket_enter_listening(s);
1280 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1281 [SOCKET_DEAD] = "dead",
1282 [SOCKET_START_PRE] = "start-pre",
1283 [SOCKET_START_POST] = "start-post",
1284 [SOCKET_LISTENING] = "listening",
1285 [SOCKET_RUNNING] = "running",
1286 [SOCKET_STOP_PRE] = "stop-pre",
1287 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1288 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1289 [SOCKET_STOP_POST] = "stop-post",
1290 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1291 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
1292 [SOCKET_MAINTAINANCE] = "maintainance"
1295 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1297 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1298 [SOCKET_EXEC_START_PRE] = "StartPre",
1299 [SOCKET_EXEC_START_POST] = "StartPost",
1300 [SOCKET_EXEC_STOP_PRE] = "StopPre",
1301 [SOCKET_EXEC_STOP_POST] = "StopPost"
1304 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1306 const UnitVTable socket_vtable = {
1307 .suffix = ".socket",
1309 .init = socket_init,
1310 .done = socket_done,
1311 .load = socket_load,
1313 .coldplug = socket_coldplug,
1315 .dump = socket_dump,
1317 .start = socket_start,
1318 .stop = socket_stop,
1320 .serialize = socket_serialize,
1321 .deserialize_item = socket_deserialize_item,
1323 .active_state = socket_active_state,
1324 .sub_state_to_string = socket_sub_state_to_string,
1326 .fd_event = socket_fd_event,
1327 .sigchld_event = socket_sigchld_event,
1328 .timer_event = socket_timer_event,
1330 .bus_message_handler = bus_socket_message_handler