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_INACTIVE_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;
69 s->keep_alive = false;
71 s->receive_buffer = 0;
79 exec_context_init(&s->exec_context);
81 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
84 static void socket_unwatch_control_pid(Socket *s) {
87 if (s->control_pid <= 0)
90 unit_unwatch_pid(UNIT(s), s->control_pid);
94 static void socket_done(Unit *u) {
95 Socket *s = SOCKET(u);
101 while ((p = s->ports)) {
102 LIST_REMOVE(SocketPort, port, s->ports, p);
105 unit_unwatch_fd(UNIT(s), &p->fd_watch);
106 close_nointr_nofail(p->fd);
113 exec_context_done(&s->exec_context);
114 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
115 s->control_command = NULL;
117 socket_unwatch_control_pid(s);
121 free(s->bind_to_device);
122 s->bind_to_device = NULL;
124 unit_unwatch_timer(u, &s->timer_watch);
126 /* Make sure no service instance refers to us anymore. */
127 LIST_FOREACH(units_per_type, i, u->meta.manager->units_per_type[UNIT_SERVICE]) {
128 Service *service = (Service *) i;
130 if (service->socket == s)
131 service->socket = NULL;
135 static bool have_non_accept_socket(Socket *s) {
143 LIST_FOREACH(port, p, s->ports) {
145 if (p->type != SOCKET_SOCKET)
148 if (!socket_address_can_accept(&p->address))
155 static int socket_verify(Socket *s) {
158 if (s->meta.load_state != UNIT_LOADED)
162 log_error("%s lacks Listen setting. Refusing.", s->meta.id);
166 if (s->accept && s->max_connections <= 0) {
167 log_error("%s's MaxConnection setting too small. Refusing.", s->meta.id);
171 if (s->exec_context.pam_name && s->kill_mode != KILL_CONTROL_GROUP) {
172 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
179 static bool socket_needs_mount(Socket *s, const char *prefix) {
184 LIST_FOREACH(port, p, s->ports) {
186 if (p->type == SOCKET_SOCKET) {
187 if (socket_address_needs_mount(&p->address, prefix))
190 assert(p->type == SOCKET_FIFO);
191 if (path_startswith(p->path, prefix))
199 int socket_add_one_mount_link(Socket *s, Mount *m) {
205 if (s->meta.load_state != UNIT_LOADED ||
206 m->meta.load_state != UNIT_LOADED)
209 if (!socket_needs_mount(s, m->where))
212 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(s), true)) < 0)
215 if ((r = unit_add_dependency(UNIT(s), UNIT_REQUIRES, UNIT(m), true)) < 0)
221 static int socket_add_mount_links(Socket *s) {
227 LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
228 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
234 static int socket_add_device_link(Socket *s) {
240 if (!s->bind_to_device)
243 if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
246 r = unit_add_node_link(UNIT(s), t, false);
252 static int socket_load(Unit *u) {
253 Socket *s = SOCKET(u);
257 assert(u->meta.load_state == UNIT_STUB);
259 if ((r = unit_load_fragment_and_dropin(u)) < 0)
262 /* This is a new unit? Then let's add in some extras */
263 if (u->meta.load_state == UNIT_LOADED) {
265 if (have_non_accept_socket(s)) {
266 if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)))
269 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
273 if ((r = socket_add_mount_links(s)) < 0)
276 if ((r = socket_add_device_link(s)) < 0)
279 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
282 if ((r = unit_add_default_cgroup(u)) < 0)
286 return socket_verify(s);
289 static const char* listen_lookup(int type) {
291 if (type == SOCK_STREAM)
292 return "ListenStream";
293 else if (type == SOCK_DGRAM)
294 return "ListenDatagram";
295 else if (type == SOCK_SEQPACKET)
296 return "ListenSequentialPacket";
298 assert_not_reached("Unknown socket type");
302 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
305 Socket *s = SOCKET(u);
313 p2 = strappend(prefix, "\t");
314 prefix2 = p2 ? p2 : prefix;
317 "%sSocket State: %s\n"
318 "%sBindIPv6Only: %s\n"
321 "%sSocketMode: %04o\n"
322 "%sDirectoryMode: %04o\n"
325 prefix, socket_state_to_string(s->state),
326 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
328 prefix, kill_mode_to_string(s->kill_mode),
329 prefix, s->socket_mode,
330 prefix, s->directory_mode,
331 prefix, yes_no(s->keep_alive),
332 prefix, yes_no(s->free_bind));
334 if (s->control_pid > 0)
336 "%sControl PID: %lu\n",
337 prefix, (unsigned long) s->control_pid);
339 if (s->bind_to_device)
341 "%sBindToDevice: %s\n",
342 prefix, s->bind_to_device);
347 "%sNConnections: %u\n"
348 "%sMaxConnections: %u\n",
349 prefix, s->n_accepted,
350 prefix, s->n_connections,
351 prefix, s->max_connections);
353 if (s->priority >= 0)
356 prefix, s->priority);
358 if (s->receive_buffer > 0)
360 "%sReceiveBuffer: %zu\n",
361 prefix, s->receive_buffer);
363 if (s->send_buffer > 0)
365 "%sSendBuffer: %zu\n",
366 prefix, s->send_buffer);
378 if (s->pipe_size > 0)
381 prefix, s->pipe_size);
388 LIST_FOREACH(port, p, s->ports) {
390 if (p->type == SOCKET_SOCKET) {
395 if ((r = socket_address_print(&p->address, &k)) < 0)
400 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
403 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
406 exec_context_dump(&s->exec_context, f, prefix);
408 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
409 if (!s->exec_command[c])
412 fprintf(f, "%s-> %s:\n",
413 prefix, socket_exec_command_to_string(c));
415 exec_command_dump_list(s->exec_command[c], f, prefix2);
421 static int instance_from_socket(int fd, unsigned nr, char **instance) {
426 struct sockaddr_un un;
427 struct sockaddr_in in;
428 struct sockaddr_in6 in6;
429 struct sockaddr_storage storage;
436 if (getsockname(fd, &local.sa, &l) < 0)
440 if (getpeername(fd, &remote.sa, &l) < 0)
443 switch (local.sa.sa_family) {
447 a = ntohl(local.in.sin_addr.s_addr),
448 b = ntohl(remote.in.sin_addr.s_addr);
451 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
453 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
454 ntohs(local.in.sin_port),
455 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
456 ntohs(remote.in.sin_port)) < 0)
463 static const char ipv4_prefix[] = {
464 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
467 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
468 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
470 *a = local.in6.sin6_addr.s6_addr+12,
471 *b = remote.in6.sin6_addr.s6_addr+12;
474 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
476 a[0], a[1], a[2], a[3],
477 ntohs(local.in6.sin6_port),
478 b[0], b[1], b[2], b[3],
479 ntohs(remote.in6.sin6_port)) < 0)
482 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
487 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
488 ntohs(local.in6.sin6_port),
489 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
490 ntohs(remote.in6.sin6_port)) < 0)
501 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
507 (unsigned long) ucred.pid,
508 (unsigned long) ucred.uid) < 0)
515 assert_not_reached("Unhandled socket type.");
522 static void socket_close_fds(Socket *s) {
527 LIST_FOREACH(port, p, s->ports) {
531 unit_unwatch_fd(UNIT(s), &p->fd_watch);
532 close_nointr_nofail(p->fd);
534 /* One little note: we should never delete any sockets
535 * in the file system here! After all some other
536 * process we spawned might still have a reference of
537 * this fd and wants to continue to use it. Therefore
538 * we delete sockets in the file system before we
539 * create a new one, not after we stopped using
546 static void socket_apply_socket_options(Socket *s, int fd) {
551 int b = s->keep_alive;
552 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
553 log_warning("SO_KEEPALIVE failed: %m");
556 if (s->priority >= 0)
557 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
558 log_warning("SO_PRIORITY failed: %m");
560 if (s->receive_buffer > 0) {
561 int value = (int) s->receive_buffer;
562 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
563 log_warning("SO_RCVBUF failed: %m");
566 if (s->send_buffer > 0) {
567 int value = (int) s->send_buffer;
568 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
569 log_warning("SO_SNDBUF failed: %m");
573 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
574 log_warning("SO_MARK failed: %m");
577 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
578 log_warning("IP_TOS failed: %m");
581 if (setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl)) < 0)
582 log_warning("IP_TTL failed: %m");
585 static void socket_apply_pipe_options(Socket *s, int fd) {
589 if (s->pipe_size > 0)
590 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
591 log_warning("F_SETPIPE_SZ: %m");
594 static int socket_open_fds(Socket *s) {
600 LIST_FOREACH(port, p, s->ports) {
605 if (p->type == SOCKET_SOCKET) {
607 if ((r = socket_address_listen(
618 socket_apply_socket_options(s, p->fd);
622 assert(p->type == SOCKET_FIFO);
624 mkdir_parents(p->path, s->directory_mode);
626 if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
631 if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
636 if (fstat(p->fd, &st) < 0) {
641 /* FIXME verify user, access mode */
643 if (!S_ISFIFO(st.st_mode)) {
648 socket_apply_pipe_options(s, p->fd);
659 static void socket_unwatch_fds(Socket *s) {
664 LIST_FOREACH(port, p, s->ports) {
668 unit_unwatch_fd(UNIT(s), &p->fd_watch);
672 static int socket_watch_fds(Socket *s) {
678 LIST_FOREACH(port, p, s->ports) {
682 p->fd_watch.socket_accept =
684 p->type == SOCKET_SOCKET &&
685 socket_address_can_accept(&p->address);
687 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
694 socket_unwatch_fds(s);
698 static void socket_set_state(Socket *s, SocketState state) {
699 SocketState old_state;
702 old_state = s->state;
705 if (state != SOCKET_START_PRE &&
706 state != SOCKET_START_POST &&
707 state != SOCKET_STOP_PRE &&
708 state != SOCKET_STOP_PRE_SIGTERM &&
709 state != SOCKET_STOP_PRE_SIGKILL &&
710 state != SOCKET_STOP_POST &&
711 state != SOCKET_FINAL_SIGTERM &&
712 state != SOCKET_FINAL_SIGKILL) {
713 unit_unwatch_timer(UNIT(s), &s->timer_watch);
714 socket_unwatch_control_pid(s);
715 s->control_command = NULL;
716 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
719 if (state != SOCKET_LISTENING)
720 socket_unwatch_fds(s);
722 if (state != SOCKET_START_POST &&
723 state != SOCKET_LISTENING &&
724 state != SOCKET_RUNNING &&
725 state != SOCKET_STOP_PRE &&
726 state != SOCKET_STOP_PRE_SIGTERM &&
727 state != SOCKET_STOP_PRE_SIGKILL)
730 if (state != old_state)
731 log_debug("%s changed %s -> %s",
733 socket_state_to_string(old_state),
734 socket_state_to_string(state));
736 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
739 static int socket_coldplug(Unit *u) {
740 Socket *s = SOCKET(u);
744 assert(s->state == SOCKET_DEAD);
746 if (s->deserialized_state != s->state) {
748 if (s->deserialized_state == SOCKET_START_PRE ||
749 s->deserialized_state == SOCKET_START_POST ||
750 s->deserialized_state == SOCKET_STOP_PRE ||
751 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
752 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
753 s->deserialized_state == SOCKET_STOP_POST ||
754 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
755 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
757 if (s->control_pid <= 0)
760 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
763 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
767 if (s->deserialized_state == SOCKET_START_POST ||
768 s->deserialized_state == SOCKET_LISTENING ||
769 s->deserialized_state == SOCKET_RUNNING ||
770 s->deserialized_state == SOCKET_STOP_PRE ||
771 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
772 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
773 if ((r = socket_open_fds(s)) < 0)
776 if (s->deserialized_state == SOCKET_LISTENING)
777 if ((r = socket_watch_fds(s)) < 0)
780 socket_set_state(s, s->deserialized_state);
786 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
795 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
798 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
807 s->meta.manager->environment,
810 s->meta.manager->confirm_spawn,
811 s->meta.cgroup_bondings,
818 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
819 /* FIXME: we need to do something here */
827 unit_unwatch_timer(UNIT(s), &s->timer_watch);
832 static void socket_enter_dead(Socket *s, bool success) {
838 socket_set_state(s, s->failure ? SOCKET_MAINTENANCE : SOCKET_DEAD);
841 static void socket_enter_signal(Socket *s, SocketState state, bool success);
843 static void socket_enter_stop_post(Socket *s, bool success) {
850 socket_unwatch_control_pid(s);
852 s->control_command_id = SOCKET_EXEC_STOP_POST;
854 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
855 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
858 socket_set_state(s, SOCKET_STOP_POST);
860 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
865 log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
866 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
869 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
878 if (s->kill_mode != KILL_NONE) {
879 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
881 if (s->kill_mode == KILL_CONTROL_GROUP) {
883 if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig)) < 0) {
884 if (r != -EAGAIN && r != -ESRCH)
890 if (!sent && s->control_pid > 0)
891 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
897 if (sent && s->control_pid > 0) {
898 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
901 socket_set_state(s, state);
902 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
903 socket_enter_stop_post(s, true);
905 socket_enter_dead(s, true);
910 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
912 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
913 socket_enter_stop_post(s, false);
915 socket_enter_dead(s, false);
918 static void socket_enter_stop_pre(Socket *s, bool success) {
925 socket_unwatch_control_pid(s);
927 s->control_command_id = SOCKET_EXEC_STOP_PRE;
929 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
930 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
933 socket_set_state(s, SOCKET_STOP_PRE);
935 socket_enter_stop_post(s, true);
940 log_warning("%s failed to run 'stop-pre' task: %s", s->meta.id, strerror(-r));
941 socket_enter_stop_post(s, false);
944 static void socket_enter_listening(Socket *s) {
948 if ((r = socket_watch_fds(s)) < 0) {
949 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
953 socket_set_state(s, SOCKET_LISTENING);
957 socket_enter_stop_pre(s, false);
960 static void socket_enter_start_post(Socket *s) {
964 if ((r = socket_open_fds(s)) < 0) {
965 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
969 socket_unwatch_control_pid(s);
971 s->control_command_id = SOCKET_EXEC_START_POST;
973 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
974 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
975 log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
979 socket_set_state(s, SOCKET_START_POST);
981 socket_enter_listening(s);
986 socket_enter_stop_pre(s, false);
989 static void socket_enter_start_pre(Socket *s) {
993 socket_unwatch_control_pid(s);
995 s->control_command_id = SOCKET_EXEC_START_PRE;
997 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
998 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1001 socket_set_state(s, SOCKET_START_PRE);
1003 socket_enter_start_post(s);
1008 log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
1009 socket_enter_dead(s, false);
1012 static void socket_enter_running(Socket *s, int cfd) {
1018 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
1021 socket_set_state(s, SOCKET_RUNNING);
1024 char *prefix, *instance, *name;
1026 if (s->n_connections >= s->max_connections) {
1027 log_warning("Too many incoming connections (%u)", s->n_connections);
1028 close_nointr_nofail(cfd);
1032 if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)) < 0)
1035 if (!(prefix = unit_name_to_prefix(s->meta.id))) {
1041 name = unit_name_build(prefix, instance, ".service");
1050 r = manager_load_unit(s->meta.manager, name, NULL, &u);
1056 if ((r = service_set_socket_fd(SERVICE(u), cfd, s)) < 0)
1061 s->n_connections ++;
1063 if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, NULL)) < 0)
1070 log_warning("%s failed to queue socket startup job: %s", s->meta.id, strerror(-r));
1071 socket_enter_stop_pre(s, false);
1074 close_nointr_nofail(cfd);
1077 static void socket_run_next(Socket *s, bool success) {
1081 assert(s->control_command);
1082 assert(s->control_command->command_next);
1087 socket_unwatch_control_pid(s);
1089 s->control_command = s->control_command->command_next;
1091 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1097 log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
1099 if (s->state == SOCKET_START_POST)
1100 socket_enter_stop_pre(s, false);
1101 else if (s->state == SOCKET_STOP_POST)
1102 socket_enter_dead(s, false);
1104 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1107 static int socket_start(Unit *u) {
1108 Socket *s = SOCKET(u);
1112 /* We cannot fulfill this request right now, try again later
1114 if (s->state == SOCKET_STOP_PRE ||
1115 s->state == SOCKET_STOP_PRE_SIGKILL ||
1116 s->state == SOCKET_STOP_PRE_SIGTERM ||
1117 s->state == SOCKET_STOP_POST ||
1118 s->state == SOCKET_FINAL_SIGTERM ||
1119 s->state == SOCKET_FINAL_SIGKILL)
1122 if (s->state == SOCKET_START_PRE ||
1123 s->state == SOCKET_START_POST)
1126 /* Cannot run this without the service being around */
1128 if (s->service->meta.load_state != UNIT_LOADED)
1131 /* If the service is alredy actvie we cannot start the
1133 if (s->service->state != SERVICE_DEAD &&
1134 s->service->state != SERVICE_MAINTENANCE &&
1135 s->service->state != SERVICE_AUTO_RESTART)
1139 assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTENANCE);
1142 socket_enter_start_pre(s);
1146 static int socket_stop(Unit *u) {
1147 Socket *s = SOCKET(u);
1151 /* We cannot fulfill this request right now, try again later
1153 if (s->state == SOCKET_START_PRE ||
1154 s->state == SOCKET_START_POST)
1158 if (s->state == SOCKET_STOP_PRE ||
1159 s->state == SOCKET_STOP_PRE_SIGTERM ||
1160 s->state == SOCKET_STOP_PRE_SIGKILL ||
1161 s->state == SOCKET_STOP_POST ||
1162 s->state == SOCKET_FINAL_SIGTERM ||
1163 s->state == SOCKET_FINAL_SIGTERM)
1166 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1168 socket_enter_stop_pre(s, true);
1172 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1173 Socket *s = SOCKET(u);
1181 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1182 unit_serialize_item(u, f, "failure", yes_no(s->failure));
1183 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1185 if (s->control_pid > 0)
1186 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1188 if (s->control_command_id >= 0)
1189 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1191 LIST_FOREACH(port, p, s->ports) {
1197 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1200 if (p->type == SOCKET_SOCKET) {
1203 if ((r = socket_address_print(&p->address, &t)) < 0)
1206 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1209 assert(p->type == SOCKET_FIFO);
1210 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1217 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1218 Socket *s = SOCKET(u);
1226 if (streq(key, "state")) {
1229 if ((state = socket_state_from_string(value)) < 0)
1230 log_debug("Failed to parse state value %s", value);
1232 s->deserialized_state = state;
1233 } else if (streq(key, "failure")) {
1236 if ((b = parse_boolean(value)) < 0)
1237 log_debug("Failed to parse failure value %s", value);
1239 s->failure = b || s->failure;
1241 } else if (streq(key, "n-accepted")) {
1244 if ((r = safe_atou(value, &k)) < 0)
1245 log_debug("Failed to parse n-accepted value %s", value);
1248 } else if (streq(key, "control-pid")) {
1251 if ((r = parse_pid(value, &pid)) < 0)
1252 log_debug("Failed to parse control-pid value %s", value);
1254 s->control_pid = pid;
1255 } else if (streq(key, "control-command")) {
1256 SocketExecCommand id;
1258 if ((id = socket_exec_command_from_string(value)) < 0)
1259 log_debug("Failed to parse exec-command value %s", value);
1261 s->control_command_id = id;
1262 s->control_command = s->exec_command[id];
1264 } else if (streq(key, "fifo")) {
1268 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1269 log_debug("Failed to parse fifo value %s", value);
1272 LIST_FOREACH(port, p, s->ports)
1273 if (streq(p->path, value+skip))
1278 close_nointr_nofail(p->fd);
1279 p->fd = fdset_remove(fds, fd);
1283 } else if (streq(key, "socket")) {
1284 int fd, type, skip = 0;
1287 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1288 log_debug("Failed to parse socket value %s", value);
1291 LIST_FOREACH(port, p, s->ports)
1292 if (socket_address_is(&p->address, value+skip, type))
1297 close_nointr_nofail(p->fd);
1298 p->fd = fdset_remove(fds, fd);
1303 log_debug("Unknown serialization key '%s'", key);
1308 static UnitActiveState socket_active_state(Unit *u) {
1311 return state_translation_table[SOCKET(u)->state];
1314 static const char *socket_sub_state_to_string(Unit *u) {
1317 return socket_state_to_string(SOCKET(u)->state);
1320 static bool socket_check_gc(Unit *u) {
1321 Socket *s = SOCKET(u);
1325 return s->n_connections > 0;
1328 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1329 Socket *s = SOCKET(u);
1335 if (s->state != SOCKET_LISTENING)
1338 log_debug("Incoming traffic on %s", u->meta.id);
1340 if (events != EPOLLIN) {
1341 log_error("Got invalid poll event on socket.");
1345 if (w->socket_accept) {
1348 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1353 log_error("Failed to accept socket: %m");
1360 socket_apply_socket_options(s, cfd);
1363 socket_enter_running(s, cfd);
1367 socket_enter_stop_pre(s, false);
1370 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1371 Socket *s = SOCKET(u);
1377 if (pid != s->control_pid)
1382 success = is_clean_exit(code, status);
1383 s->failure = s->failure || !success;
1385 if (s->control_command)
1386 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1388 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1390 if (s->control_command && s->control_command->command_next && success) {
1391 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1392 socket_run_next(s, success);
1394 s->control_command = NULL;
1395 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1397 /* No further commands for this step, so let's figure
1398 * out what to do next */
1400 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1404 case SOCKET_START_PRE:
1406 socket_enter_start_post(s);
1408 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1411 case SOCKET_START_POST:
1413 socket_enter_listening(s);
1415 socket_enter_stop_pre(s, false);
1418 case SOCKET_STOP_PRE:
1419 case SOCKET_STOP_PRE_SIGTERM:
1420 case SOCKET_STOP_PRE_SIGKILL:
1421 socket_enter_stop_post(s, success);
1424 case SOCKET_STOP_POST:
1425 case SOCKET_FINAL_SIGTERM:
1426 case SOCKET_FINAL_SIGKILL:
1427 socket_enter_dead(s, success);
1431 assert_not_reached("Uh, control process died at wrong time.");
1436 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1437 Socket *s = SOCKET(u);
1440 assert(elapsed == 1);
1441 assert(w == &s->timer_watch);
1445 case SOCKET_START_PRE:
1446 log_warning("%s starting timed out. Terminating.", u->meta.id);
1447 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1449 case SOCKET_START_POST:
1450 log_warning("%s starting timed out. Stopping.", u->meta.id);
1451 socket_enter_stop_pre(s, false);
1454 case SOCKET_STOP_PRE:
1455 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1456 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1459 case SOCKET_STOP_PRE_SIGTERM:
1460 log_warning("%s stopping timed out. Killing.", u->meta.id);
1461 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1464 case SOCKET_STOP_PRE_SIGKILL:
1465 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1466 socket_enter_stop_post(s, false);
1469 case SOCKET_STOP_POST:
1470 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1471 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1474 case SOCKET_FINAL_SIGTERM:
1475 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1476 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1479 case SOCKET_FINAL_SIGKILL:
1480 log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id);
1481 socket_enter_dead(s, false);
1485 assert_not_reached("Timeout at wrong time.");
1489 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1498 /* Called from the service code for requesting our fds */
1501 LIST_FOREACH(port, p, s->ports)
1505 if (!(rfds = new(int, rn_fds)) < 0)
1509 LIST_FOREACH(port, p, s->ports)
1513 assert(k == rn_fds);
1521 void socket_notify_service_dead(Socket *s) {
1524 /* The service is dead. Dang!
1526 * This is strictly for one-instance-for-all-connections
1529 if (s->state == SOCKET_RUNNING) {
1530 log_debug("%s got notified about service death.", s->meta.id);
1531 socket_enter_listening(s);
1535 void socket_connection_unref(Socket *s) {
1538 /* The service is dead. Yay!
1540 * This is strictly for one-onstance-per-connection
1543 assert(s->n_connections > 0);
1546 log_debug("%s: One connection closed, %u left.", s->meta.id, s->n_connections);
1549 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1550 [SOCKET_DEAD] = "dead",
1551 [SOCKET_START_PRE] = "start-pre",
1552 [SOCKET_START_POST] = "start-post",
1553 [SOCKET_LISTENING] = "listening",
1554 [SOCKET_RUNNING] = "running",
1555 [SOCKET_STOP_PRE] = "stop-pre",
1556 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1557 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1558 [SOCKET_STOP_POST] = "stop-post",
1559 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1560 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
1561 [SOCKET_MAINTENANCE] = "maintenance"
1564 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1566 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1567 [SOCKET_EXEC_START_PRE] = "StartPre",
1568 [SOCKET_EXEC_START_POST] = "StartPost",
1569 [SOCKET_EXEC_STOP_PRE] = "StopPre",
1570 [SOCKET_EXEC_STOP_POST] = "StopPost"
1573 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1575 const UnitVTable socket_vtable = {
1576 .suffix = ".socket",
1578 .init = socket_init,
1579 .done = socket_done,
1580 .load = socket_load,
1582 .coldplug = socket_coldplug,
1584 .dump = socket_dump,
1586 .start = socket_start,
1587 .stop = socket_stop,
1589 .serialize = socket_serialize,
1590 .deserialize_item = socket_deserialize_item,
1592 .active_state = socket_active_state,
1593 .sub_state_to_string = socket_sub_state_to_string,
1595 .check_gc = socket_check_gc,
1597 .fd_event = socket_fd_event,
1598 .sigchld_event = socket_sigchld_event,
1599 .timer_event = socket_timer_event,
1601 .bus_message_handler = bus_socket_message_handler