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_MAINTENANCE] = UNIT_INACTIVE,
55 static void socket_init(Unit *u) {
56 Socket *s = SOCKET(u);
59 assert(u->meta.load_state == UNIT_STUB);
61 s->backlog = SOMAXCONN;
62 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
63 s->directory_mode = 0755;
64 s->socket_mode = 0666;
66 s->max_connections = 64;
68 exec_context_init(&s->exec_context);
70 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
73 static void socket_unwatch_control_pid(Socket *s) {
76 if (s->control_pid <= 0)
79 unit_unwatch_pid(UNIT(s), s->control_pid);
83 static void socket_done(Unit *u) {
84 Socket *s = SOCKET(u);
90 while ((p = s->ports)) {
91 LIST_REMOVE(SocketPort, port, s->ports, p);
94 unit_unwatch_fd(UNIT(s), &p->fd_watch);
95 close_nointr_nofail(p->fd);
102 exec_context_done(&s->exec_context);
103 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
104 s->control_command = NULL;
106 socket_unwatch_control_pid(s);
110 free(s->bind_to_device);
111 s->bind_to_device = NULL;
113 unit_unwatch_timer(u, &s->timer_watch);
115 /* Make sure no service instance refers to us anymore. */
116 LIST_FOREACH(units_per_type, i, u->meta.manager->units_per_type[UNIT_SERVICE]) {
117 Service *service = (Service *) i;
119 if (service->socket == s)
120 service->socket = NULL;
124 static bool have_non_accept_socket(Socket *s) {
132 LIST_FOREACH(port, p, s->ports) {
134 if (p->type != SOCKET_SOCKET)
137 if (!socket_address_can_accept(&p->address))
144 static int socket_verify(Socket *s) {
147 if (s->meta.load_state != UNIT_LOADED)
151 log_error("%s lacks Listen setting. Refusing.", s->meta.id);
155 if (s->accept && s->max_connections <= 0) {
156 log_error("%s's MaxConnection setting too small. Refusing.", s->meta.id);
160 if (s->exec_context.pam_name && s->kill_mode != KILL_CONTROL_GROUP) {
161 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
168 static bool socket_needs_mount(Socket *s, const char *prefix) {
173 LIST_FOREACH(port, p, s->ports) {
175 if (p->type == SOCKET_SOCKET) {
176 if (socket_address_needs_mount(&p->address, prefix))
179 assert(p->type == SOCKET_FIFO);
180 if (path_startswith(p->path, prefix))
188 int socket_add_one_mount_link(Socket *s, Mount *m) {
194 if (s->meta.load_state != UNIT_LOADED ||
195 m->meta.load_state != UNIT_LOADED)
198 if (!socket_needs_mount(s, m->where))
201 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(s), true)) < 0)
204 if ((r = unit_add_dependency(UNIT(s), UNIT_REQUIRES, UNIT(m), true)) < 0)
210 static int socket_add_mount_links(Socket *s) {
216 LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
217 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
223 static int socket_add_device_link(Socket *s) {
229 if (!s->bind_to_device)
232 if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
235 r = unit_add_node_link(UNIT(s), t, false);
241 static int socket_load(Unit *u) {
242 Socket *s = SOCKET(u);
246 assert(u->meta.load_state == UNIT_STUB);
248 if ((r = unit_load_fragment_and_dropin(u)) < 0)
251 /* This is a new unit? Then let's add in some extras */
252 if (u->meta.load_state == UNIT_LOADED) {
254 if (have_non_accept_socket(s)) {
255 if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)))
258 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
262 if ((r = socket_add_mount_links(s)) < 0)
265 if ((r = socket_add_device_link(s)) < 0)
268 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
271 if ((r = unit_add_default_cgroup(u)) < 0)
275 return socket_verify(s);
278 static const char* listen_lookup(int type) {
280 if (type == SOCK_STREAM)
281 return "ListenStream";
282 else if (type == SOCK_DGRAM)
283 return "ListenDatagram";
284 else if (type == SOCK_SEQPACKET)
285 return "ListenSequentialPacket";
287 assert_not_reached("Unknown socket type");
291 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
294 Socket *s = SOCKET(u);
302 p2 = strappend(prefix, "\t");
303 prefix2 = p2 ? p2 : prefix;
306 "%sSocket State: %s\n"
307 "%sBindIPv6Only: %s\n"
310 "%sSocketMode: %04o\n"
311 "%sDirectoryMode: %04o\n",
312 prefix, socket_state_to_string(s->state),
313 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
315 prefix, kill_mode_to_string(s->kill_mode),
316 prefix, s->socket_mode,
317 prefix, s->directory_mode);
319 if (s->control_pid > 0)
321 "%sControl PID: %lu\n",
322 prefix, (unsigned long) s->control_pid);
324 if (s->bind_to_device)
326 "%sBindToDevice: %s\n",
327 prefix, s->bind_to_device);
332 "%sNConnections: %u\n"
333 "%sMaxConnections: %u\n",
334 prefix, s->n_accepted,
335 prefix, s->n_connections,
336 prefix, s->max_connections);
338 LIST_FOREACH(port, p, s->ports) {
340 if (p->type == SOCKET_SOCKET) {
345 if ((r = socket_address_print(&p->address, &k)) < 0)
350 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
353 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
356 exec_context_dump(&s->exec_context, f, prefix);
358 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
359 if (!s->exec_command[c])
362 fprintf(f, "%s-> %s:\n",
363 prefix, socket_exec_command_to_string(c));
365 exec_command_dump_list(s->exec_command[c], f, prefix2);
371 static int instance_from_socket(int fd, unsigned nr, char **instance) {
376 struct sockaddr_un un;
377 struct sockaddr_in in;
378 struct sockaddr_in6 in6;
379 struct sockaddr_storage storage;
386 if (getsockname(fd, &local.sa, &l) < 0)
390 if (getpeername(fd, &remote.sa, &l) < 0)
393 switch (local.sa.sa_family) {
397 a = ntohl(local.in.sin_addr.s_addr),
398 b = ntohl(remote.in.sin_addr.s_addr);
401 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
403 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
404 ntohs(local.in.sin_port),
405 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
406 ntohs(remote.in.sin_port)) < 0)
413 static const char ipv4_prefix[] = {
414 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
417 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
418 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
420 *a = local.in6.sin6_addr.s6_addr+12,
421 *b = remote.in6.sin6_addr.s6_addr+12;
424 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
426 a[0], a[1], a[2], a[3],
427 ntohs(local.in6.sin6_port),
428 b[0], b[1], b[2], b[3],
429 ntohs(remote.in6.sin6_port)) < 0)
432 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
437 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
438 ntohs(local.in6.sin6_port),
439 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
440 ntohs(remote.in6.sin6_port)) < 0)
451 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
457 (unsigned long) ucred.pid,
458 (unsigned long) ucred.uid) < 0)
465 assert_not_reached("Unhandled socket type.");
472 static void socket_close_fds(Socket *s) {
477 LIST_FOREACH(port, p, s->ports) {
481 unit_unwatch_fd(UNIT(s), &p->fd_watch);
482 close_nointr_nofail(p->fd);
484 /* One little note: we should never delete any sockets
485 * in the file system here! After all some other
486 * process we spawned might still have a reference of
487 * this fd and wants to continue to use it. Therefore
488 * we delete sockets in the file system before we
489 * create a new one, not after we stopped using
496 static int socket_open_fds(Socket *s) {
502 LIST_FOREACH(port, p, s->ports) {
507 if (p->type == SOCKET_SOCKET) {
509 if ((r = socket_address_listen(
521 assert(p->type == SOCKET_FIFO);
523 mkdir_parents(p->path, s->directory_mode);
525 if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
530 if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
535 if (fstat(p->fd, &st) < 0) {
540 /* FIXME verify user, access mode */
542 if (!S_ISFIFO(st.st_mode)) {
556 static void socket_unwatch_fds(Socket *s) {
561 LIST_FOREACH(port, p, s->ports) {
565 unit_unwatch_fd(UNIT(s), &p->fd_watch);
569 static int socket_watch_fds(Socket *s) {
575 LIST_FOREACH(port, p, s->ports) {
579 p->fd_watch.socket_accept =
581 p->type == SOCKET_SOCKET &&
582 socket_address_can_accept(&p->address);
584 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
591 socket_unwatch_fds(s);
595 static void socket_set_state(Socket *s, SocketState state) {
596 SocketState old_state;
599 old_state = s->state;
602 if (state != SOCKET_START_PRE &&
603 state != SOCKET_START_POST &&
604 state != SOCKET_STOP_PRE &&
605 state != SOCKET_STOP_PRE_SIGTERM &&
606 state != SOCKET_STOP_PRE_SIGKILL &&
607 state != SOCKET_STOP_POST &&
608 state != SOCKET_FINAL_SIGTERM &&
609 state != SOCKET_FINAL_SIGKILL) {
610 unit_unwatch_timer(UNIT(s), &s->timer_watch);
611 socket_unwatch_control_pid(s);
612 s->control_command = NULL;
613 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
616 if (state != SOCKET_LISTENING)
617 socket_unwatch_fds(s);
619 if (state != SOCKET_START_POST &&
620 state != SOCKET_LISTENING &&
621 state != SOCKET_RUNNING &&
622 state != SOCKET_STOP_PRE &&
623 state != SOCKET_STOP_PRE_SIGTERM &&
624 state != SOCKET_STOP_PRE_SIGKILL)
627 if (state != old_state)
628 log_debug("%s changed %s -> %s",
630 socket_state_to_string(old_state),
631 socket_state_to_string(state));
633 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
636 static int socket_coldplug(Unit *u) {
637 Socket *s = SOCKET(u);
641 assert(s->state == SOCKET_DEAD);
643 if (s->deserialized_state != s->state) {
645 if (s->deserialized_state == SOCKET_START_PRE ||
646 s->deserialized_state == SOCKET_START_POST ||
647 s->deserialized_state == SOCKET_STOP_PRE ||
648 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
649 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
650 s->deserialized_state == SOCKET_STOP_POST ||
651 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
652 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
654 if (s->control_pid <= 0)
657 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
660 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
664 if (s->deserialized_state == SOCKET_START_POST ||
665 s->deserialized_state == SOCKET_LISTENING ||
666 s->deserialized_state == SOCKET_RUNNING ||
667 s->deserialized_state == SOCKET_STOP_PRE ||
668 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
669 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
670 if ((r = socket_open_fds(s)) < 0)
673 if (s->deserialized_state == SOCKET_LISTENING)
674 if ((r = socket_watch_fds(s)) < 0)
677 socket_set_state(s, s->deserialized_state);
683 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
692 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
695 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
704 s->meta.manager->environment,
707 s->meta.manager->confirm_spawn,
708 s->meta.cgroup_bondings,
715 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
716 /* FIXME: we need to do something here */
724 unit_unwatch_timer(UNIT(s), &s->timer_watch);
729 static void socket_enter_dead(Socket *s, bool success) {
735 socket_set_state(s, s->failure ? SOCKET_MAINTENANCE : SOCKET_DEAD);
738 static void socket_enter_signal(Socket *s, SocketState state, bool success);
740 static void socket_enter_stop_post(Socket *s, bool success) {
747 socket_unwatch_control_pid(s);
749 s->control_command_id = SOCKET_EXEC_STOP_POST;
751 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
752 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
755 socket_set_state(s, SOCKET_STOP_POST);
757 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
762 log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
763 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
766 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
775 if (s->kill_mode != KILL_NONE) {
776 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
778 if (s->kill_mode == KILL_CONTROL_GROUP) {
780 if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig)) < 0) {
781 if (r != -EAGAIN && r != -ESRCH)
787 if (!sent && s->control_pid > 0)
788 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
794 if (sent && s->control_pid > 0) {
795 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
798 socket_set_state(s, state);
799 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
800 socket_enter_stop_post(s, true);
802 socket_enter_dead(s, true);
807 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
809 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
810 socket_enter_stop_post(s, false);
812 socket_enter_dead(s, false);
815 static void socket_enter_stop_pre(Socket *s, bool success) {
822 socket_unwatch_control_pid(s);
824 s->control_command_id = SOCKET_EXEC_STOP_PRE;
826 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
827 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
830 socket_set_state(s, SOCKET_STOP_PRE);
832 socket_enter_stop_post(s, true);
837 log_warning("%s failed to run 'stop-pre' task: %s", s->meta.id, strerror(-r));
838 socket_enter_stop_post(s, false);
841 static void socket_enter_listening(Socket *s) {
845 if ((r = socket_watch_fds(s)) < 0) {
846 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
850 socket_set_state(s, SOCKET_LISTENING);
854 socket_enter_stop_pre(s, false);
857 static void socket_enter_start_post(Socket *s) {
861 if ((r = socket_open_fds(s)) < 0) {
862 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
866 socket_unwatch_control_pid(s);
868 s->control_command_id = SOCKET_EXEC_START_POST;
870 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
871 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
872 log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
876 socket_set_state(s, SOCKET_START_POST);
878 socket_enter_listening(s);
883 socket_enter_stop_pre(s, false);
886 static void socket_enter_start_pre(Socket *s) {
890 socket_unwatch_control_pid(s);
892 s->control_command_id = SOCKET_EXEC_START_PRE;
894 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
895 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
898 socket_set_state(s, SOCKET_START_PRE);
900 socket_enter_start_post(s);
905 log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
906 socket_enter_dead(s, false);
909 static void socket_enter_running(Socket *s, int cfd) {
915 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
918 socket_set_state(s, SOCKET_RUNNING);
921 char *prefix, *instance, *name;
923 if (s->n_connections >= s->max_connections) {
924 log_warning("Too many incoming connections (%u)", s->n_connections);
925 close_nointr_nofail(cfd);
929 if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)) < 0)
932 if (!(prefix = unit_name_to_prefix(s->meta.id))) {
938 name = unit_name_build(prefix, instance, ".service");
947 r = manager_load_unit(s->meta.manager, name, NULL, &u);
953 if ((r = service_set_socket_fd(SERVICE(u), cfd, s)) < 0)
960 if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, NULL)) < 0)
967 log_warning("%s failed to queue socket startup job: %s", s->meta.id, strerror(-r));
968 socket_enter_stop_pre(s, false);
971 close_nointr_nofail(cfd);
974 static void socket_run_next(Socket *s, bool success) {
978 assert(s->control_command);
979 assert(s->control_command->command_next);
984 socket_unwatch_control_pid(s);
986 s->control_command = s->control_command->command_next;
988 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
994 log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
996 if (s->state == SOCKET_START_POST)
997 socket_enter_stop_pre(s, false);
998 else if (s->state == SOCKET_STOP_POST)
999 socket_enter_dead(s, false);
1001 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1004 static int socket_start(Unit *u) {
1005 Socket *s = SOCKET(u);
1009 /* We cannot fulfill this request right now, try again later
1011 if (s->state == SOCKET_STOP_PRE ||
1012 s->state == SOCKET_STOP_PRE_SIGKILL ||
1013 s->state == SOCKET_STOP_PRE_SIGTERM ||
1014 s->state == SOCKET_STOP_POST ||
1015 s->state == SOCKET_FINAL_SIGTERM ||
1016 s->state == SOCKET_FINAL_SIGKILL)
1019 if (s->state == SOCKET_START_PRE ||
1020 s->state == SOCKET_START_POST)
1023 /* Cannot run this without the service being around */
1025 if (s->service->meta.load_state != UNIT_LOADED)
1028 /* If the service is alredy actvie we cannot start the
1030 if (s->service->state != SERVICE_DEAD &&
1031 s->service->state != SERVICE_MAINTENANCE &&
1032 s->service->state != SERVICE_AUTO_RESTART)
1036 assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTENANCE);
1039 socket_enter_start_pre(s);
1043 static int socket_stop(Unit *u) {
1044 Socket *s = SOCKET(u);
1048 /* We cannot fulfill this request right now, try again later
1050 if (s->state == SOCKET_START_PRE ||
1051 s->state == SOCKET_START_POST)
1055 if (s->state == SOCKET_STOP_PRE ||
1056 s->state == SOCKET_STOP_PRE_SIGTERM ||
1057 s->state == SOCKET_STOP_PRE_SIGKILL ||
1058 s->state == SOCKET_STOP_POST ||
1059 s->state == SOCKET_FINAL_SIGTERM ||
1060 s->state == SOCKET_FINAL_SIGTERM)
1063 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1065 socket_enter_stop_pre(s, true);
1069 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1070 Socket *s = SOCKET(u);
1078 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1079 unit_serialize_item(u, f, "failure", yes_no(s->failure));
1080 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1082 if (s->control_pid > 0)
1083 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1085 if (s->control_command_id >= 0)
1086 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1088 LIST_FOREACH(port, p, s->ports) {
1094 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1097 if (p->type == SOCKET_SOCKET) {
1100 if ((r = socket_address_print(&p->address, &t)) < 0)
1103 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1106 assert(p->type == SOCKET_FIFO);
1107 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1114 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1115 Socket *s = SOCKET(u);
1123 if (streq(key, "state")) {
1126 if ((state = socket_state_from_string(value)) < 0)
1127 log_debug("Failed to parse state value %s", value);
1129 s->deserialized_state = state;
1130 } else if (streq(key, "failure")) {
1133 if ((b = parse_boolean(value)) < 0)
1134 log_debug("Failed to parse failure value %s", value);
1136 s->failure = b || s->failure;
1138 } else if (streq(key, "n-accepted")) {
1141 if ((r = safe_atou(value, &k)) < 0)
1142 log_debug("Failed to parse n-accepted value %s", value);
1145 } else if (streq(key, "control-pid")) {
1148 if ((r = parse_pid(value, &pid)) < 0)
1149 log_debug("Failed to parse control-pid value %s", value);
1151 s->control_pid = pid;
1152 } else if (streq(key, "control-command")) {
1153 SocketExecCommand id;
1155 if ((id = socket_exec_command_from_string(value)) < 0)
1156 log_debug("Failed to parse exec-command value %s", value);
1158 s->control_command_id = id;
1159 s->control_command = s->exec_command[id];
1161 } else if (streq(key, "fifo")) {
1165 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1166 log_debug("Failed to parse fifo value %s", value);
1169 LIST_FOREACH(port, p, s->ports)
1170 if (streq(p->path, value+skip))
1175 close_nointr_nofail(p->fd);
1176 p->fd = fdset_remove(fds, fd);
1180 } else if (streq(key, "socket")) {
1181 int fd, type, skip = 0;
1184 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1185 log_debug("Failed to parse socket value %s", value);
1188 LIST_FOREACH(port, p, s->ports)
1189 if (socket_address_is(&p->address, value+skip, type))
1194 close_nointr_nofail(p->fd);
1195 p->fd = fdset_remove(fds, fd);
1200 log_debug("Unknown serialization key '%s'", key);
1205 static UnitActiveState socket_active_state(Unit *u) {
1208 return state_translation_table[SOCKET(u)->state];
1211 static const char *socket_sub_state_to_string(Unit *u) {
1214 return socket_state_to_string(SOCKET(u)->state);
1217 static bool socket_check_gc(Unit *u) {
1218 Socket *s = SOCKET(u);
1222 return s->n_connections > 0;
1225 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1226 Socket *s = SOCKET(u);
1232 if (s->state != SOCKET_LISTENING)
1235 log_debug("Incoming traffic on %s", u->meta.id);
1237 if (events != EPOLLIN) {
1238 log_error("Got invalid poll event on socket.");
1242 if (w->socket_accept) {
1245 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1250 log_error("Failed to accept socket: %m");
1258 socket_enter_running(s, cfd);
1262 socket_enter_stop_pre(s, false);
1265 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1266 Socket *s = SOCKET(u);
1272 if (pid != s->control_pid)
1277 success = is_clean_exit(code, status);
1278 s->failure = s->failure || !success;
1280 if (s->control_command)
1281 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1283 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1285 if (s->control_command && s->control_command->command_next && success) {
1286 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1287 socket_run_next(s, success);
1289 s->control_command = NULL;
1290 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1292 /* No further commands for this step, so let's figure
1293 * out what to do next */
1295 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1299 case SOCKET_START_PRE:
1301 socket_enter_start_post(s);
1303 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1306 case SOCKET_START_POST:
1308 socket_enter_listening(s);
1310 socket_enter_stop_pre(s, false);
1313 case SOCKET_STOP_PRE:
1314 case SOCKET_STOP_PRE_SIGTERM:
1315 case SOCKET_STOP_PRE_SIGKILL:
1316 socket_enter_stop_post(s, success);
1319 case SOCKET_STOP_POST:
1320 case SOCKET_FINAL_SIGTERM:
1321 case SOCKET_FINAL_SIGKILL:
1322 socket_enter_dead(s, success);
1326 assert_not_reached("Uh, control process died at wrong time.");
1331 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1332 Socket *s = SOCKET(u);
1335 assert(elapsed == 1);
1336 assert(w == &s->timer_watch);
1340 case SOCKET_START_PRE:
1341 log_warning("%s starting timed out. Terminating.", u->meta.id);
1342 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1344 case SOCKET_START_POST:
1345 log_warning("%s starting timed out. Stopping.", u->meta.id);
1346 socket_enter_stop_pre(s, false);
1349 case SOCKET_STOP_PRE:
1350 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1351 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1354 case SOCKET_STOP_PRE_SIGTERM:
1355 log_warning("%s stopping timed out. Killing.", u->meta.id);
1356 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1359 case SOCKET_STOP_PRE_SIGKILL:
1360 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1361 socket_enter_stop_post(s, false);
1364 case SOCKET_STOP_POST:
1365 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1366 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1369 case SOCKET_FINAL_SIGTERM:
1370 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1371 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1374 case SOCKET_FINAL_SIGKILL:
1375 log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id);
1376 socket_enter_dead(s, false);
1380 assert_not_reached("Timeout at wrong time.");
1384 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1393 /* Called from the service code for requesting our fds */
1396 LIST_FOREACH(port, p, s->ports)
1400 if (!(rfds = new(int, rn_fds)) < 0)
1404 LIST_FOREACH(port, p, s->ports)
1408 assert(k == rn_fds);
1416 void socket_notify_service_dead(Socket *s) {
1419 /* The service is dead. Dang!
1421 * This is strictly for one-instance-for-all-connections
1424 if (s->state == SOCKET_RUNNING) {
1425 log_debug("%s got notified about service death.", s->meta.id);
1426 socket_enter_listening(s);
1430 void socket_connection_unref(Socket *s) {
1433 /* The service is dead. Yay!
1435 * This is strictly for one-onstance-per-connection
1438 assert(s->n_connections > 0);
1441 log_debug("%s: One connection closed, %u left.", s->meta.id, s->n_connections);
1444 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1445 [SOCKET_DEAD] = "dead",
1446 [SOCKET_START_PRE] = "start-pre",
1447 [SOCKET_START_POST] = "start-post",
1448 [SOCKET_LISTENING] = "listening",
1449 [SOCKET_RUNNING] = "running",
1450 [SOCKET_STOP_PRE] = "stop-pre",
1451 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1452 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1453 [SOCKET_STOP_POST] = "stop-post",
1454 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1455 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
1456 [SOCKET_MAINTENANCE] = "maintenance"
1459 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1461 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1462 [SOCKET_EXEC_START_PRE] = "StartPre",
1463 [SOCKET_EXEC_START_POST] = "StartPost",
1464 [SOCKET_EXEC_STOP_PRE] = "StopPre",
1465 [SOCKET_EXEC_STOP_POST] = "StopPost"
1468 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1470 const UnitVTable socket_vtable = {
1471 .suffix = ".socket",
1473 .init = socket_init,
1474 .done = socket_done,
1475 .load = socket_load,
1477 .coldplug = socket_coldplug,
1479 .dump = socket_dump,
1481 .start = socket_start,
1482 .stop = socket_stop,
1484 .serialize = socket_serialize,
1485 .deserialize_item = socket_deserialize_item,
1487 .active_state = socket_active_state,
1488 .sub_state_to_string = socket_sub_state_to_string,
1490 .check_gc = socket_check_gc,
1492 .fd_event = socket_fd_event,
1493 .sigchld_event = socket_sigchld_event,
1494 .timer_event = socket_timer_event,
1496 .bus_message_handler = bus_socket_message_handler