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 #include "bus-errors.h"
43 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
44 [SOCKET_DEAD] = UNIT_INACTIVE,
45 [SOCKET_START_PRE] = UNIT_ACTIVATING,
46 [SOCKET_START_POST] = UNIT_ACTIVATING,
47 [SOCKET_LISTENING] = UNIT_ACTIVE,
48 [SOCKET_RUNNING] = UNIT_ACTIVE,
49 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
50 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
51 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
52 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
53 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
54 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
55 [SOCKET_MAINTENANCE] = UNIT_MAINTENANCE
58 static void socket_init(Unit *u) {
59 Socket *s = SOCKET(u);
62 assert(u->meta.load_state == UNIT_STUB);
64 s->backlog = SOMAXCONN;
65 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
66 s->directory_mode = 0755;
67 s->socket_mode = 0666;
69 s->max_connections = 64;
76 exec_context_init(&s->exec_context);
78 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
81 static void socket_unwatch_control_pid(Socket *s) {
84 if (s->control_pid <= 0)
87 unit_unwatch_pid(UNIT(s), s->control_pid);
91 static void socket_done(Unit *u) {
92 Socket *s = SOCKET(u);
98 while ((p = s->ports)) {
99 LIST_REMOVE(SocketPort, port, s->ports, p);
102 unit_unwatch_fd(UNIT(s), &p->fd_watch);
103 close_nointr_nofail(p->fd);
110 exec_context_done(&s->exec_context);
111 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
112 s->control_command = NULL;
114 socket_unwatch_control_pid(s);
118 free(s->bind_to_device);
119 s->bind_to_device = NULL;
121 unit_unwatch_timer(u, &s->timer_watch);
123 /* Make sure no service instance refers to us anymore. */
124 LIST_FOREACH(units_per_type, i, u->meta.manager->units_per_type[UNIT_SERVICE]) {
125 Service *service = (Service *) i;
127 if (service->socket == s)
128 service->socket = NULL;
132 static bool have_non_accept_socket(Socket *s) {
140 LIST_FOREACH(port, p, s->ports) {
142 if (p->type != SOCKET_SOCKET)
145 if (!socket_address_can_accept(&p->address))
152 static int socket_verify(Socket *s) {
155 if (s->meta.load_state != UNIT_LOADED)
159 log_error("%s lacks Listen setting. Refusing.", s->meta.id);
163 if (s->accept && s->max_connections <= 0) {
164 log_error("%s's MaxConnection setting too small. Refusing.", s->meta.id);
168 if (s->exec_context.pam_name && s->kill_mode != KILL_CONTROL_GROUP) {
169 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
176 static bool socket_needs_mount(Socket *s, const char *prefix) {
181 LIST_FOREACH(port, p, s->ports) {
183 if (p->type == SOCKET_SOCKET) {
184 if (socket_address_needs_mount(&p->address, prefix))
187 assert(p->type == SOCKET_FIFO);
188 if (path_startswith(p->path, prefix))
196 int socket_add_one_mount_link(Socket *s, Mount *m) {
202 if (s->meta.load_state != UNIT_LOADED ||
203 m->meta.load_state != UNIT_LOADED)
206 if (!socket_needs_mount(s, m->where))
209 if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0)
215 static int socket_add_mount_links(Socket *s) {
221 LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
222 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
228 static int socket_add_device_link(Socket *s) {
234 if (!s->bind_to_device)
237 if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
240 r = unit_add_node_link(UNIT(s), t, false);
246 static int socket_add_default_dependencies(Socket *s) {
250 if (s->meta.manager->running_as == MANAGER_SYSTEM)
251 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
254 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
257 static int socket_load(Unit *u) {
258 Socket *s = SOCKET(u);
262 assert(u->meta.load_state == UNIT_STUB);
264 if ((r = unit_load_fragment_and_dropin(u)) < 0)
267 /* This is a new unit? Then let's add in some extras */
268 if (u->meta.load_state == UNIT_LOADED) {
270 if (have_non_accept_socket(s)) {
271 if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)))
274 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
278 if ((r = socket_add_mount_links(s)) < 0)
281 if ((r = socket_add_device_link(s)) < 0)
284 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
287 if ((r = unit_add_default_cgroup(u)) < 0)
290 if (s->meta.default_dependencies)
291 if ((r = socket_add_default_dependencies(s)) < 0)
295 return socket_verify(s);
298 static const char* listen_lookup(int type) {
300 if (type == SOCK_STREAM)
301 return "ListenStream";
302 else if (type == SOCK_DGRAM)
303 return "ListenDatagram";
304 else if (type == SOCK_SEQPACKET)
305 return "ListenSequentialPacket";
307 assert_not_reached("Unknown socket type");
311 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
314 Socket *s = SOCKET(u);
322 p2 = strappend(prefix, "\t");
323 prefix2 = p2 ? p2 : prefix;
326 "%sSocket State: %s\n"
327 "%sBindIPv6Only: %s\n"
330 "%sSocketMode: %04o\n"
331 "%sDirectoryMode: %04o\n"
334 prefix, socket_state_to_string(s->state),
335 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
337 prefix, kill_mode_to_string(s->kill_mode),
338 prefix, s->socket_mode,
339 prefix, s->directory_mode,
340 prefix, yes_no(s->keep_alive),
341 prefix, yes_no(s->free_bind));
343 if (s->control_pid > 0)
345 "%sControl PID: %lu\n",
346 prefix, (unsigned long) s->control_pid);
348 if (s->bind_to_device)
350 "%sBindToDevice: %s\n",
351 prefix, s->bind_to_device);
356 "%sNConnections: %u\n"
357 "%sMaxConnections: %u\n",
358 prefix, s->n_accepted,
359 prefix, s->n_connections,
360 prefix, s->max_connections);
362 if (s->priority >= 0)
365 prefix, s->priority);
367 if (s->receive_buffer > 0)
369 "%sReceiveBuffer: %zu\n",
370 prefix, s->receive_buffer);
372 if (s->send_buffer > 0)
374 "%sSendBuffer: %zu\n",
375 prefix, s->send_buffer);
387 if (s->pipe_size > 0)
390 prefix, s->pipe_size);
397 LIST_FOREACH(port, p, s->ports) {
399 if (p->type == SOCKET_SOCKET) {
404 if ((r = socket_address_print(&p->address, &k)) < 0)
409 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
412 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
415 exec_context_dump(&s->exec_context, f, prefix);
417 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
418 if (!s->exec_command[c])
421 fprintf(f, "%s-> %s:\n",
422 prefix, socket_exec_command_to_string(c));
424 exec_command_dump_list(s->exec_command[c], f, prefix2);
430 static int instance_from_socket(int fd, unsigned nr, char **instance) {
435 struct sockaddr_un un;
436 struct sockaddr_in in;
437 struct sockaddr_in6 in6;
438 struct sockaddr_storage storage;
445 if (getsockname(fd, &local.sa, &l) < 0)
449 if (getpeername(fd, &remote.sa, &l) < 0)
452 switch (local.sa.sa_family) {
456 a = ntohl(local.in.sin_addr.s_addr),
457 b = ntohl(remote.in.sin_addr.s_addr);
460 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
462 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
463 ntohs(local.in.sin_port),
464 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
465 ntohs(remote.in.sin_port)) < 0)
472 static const char ipv4_prefix[] = {
473 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
476 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
477 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
479 *a = local.in6.sin6_addr.s6_addr+12,
480 *b = remote.in6.sin6_addr.s6_addr+12;
483 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
485 a[0], a[1], a[2], a[3],
486 ntohs(local.in6.sin6_port),
487 b[0], b[1], b[2], b[3],
488 ntohs(remote.in6.sin6_port)) < 0)
491 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
496 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
497 ntohs(local.in6.sin6_port),
498 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
499 ntohs(remote.in6.sin6_port)) < 0)
510 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
516 (unsigned long) ucred.pid,
517 (unsigned long) ucred.uid) < 0)
524 assert_not_reached("Unhandled socket type.");
531 static void socket_close_fds(Socket *s) {
536 LIST_FOREACH(port, p, s->ports) {
540 unit_unwatch_fd(UNIT(s), &p->fd_watch);
541 close_nointr_nofail(p->fd);
543 /* One little note: we should never delete any sockets
544 * in the file system here! After all some other
545 * process we spawned might still have a reference of
546 * this fd and wants to continue to use it. Therefore
547 * we delete sockets in the file system before we
548 * create a new one, not after we stopped using
555 static void socket_apply_socket_options(Socket *s, int fd) {
560 int b = s->keep_alive;
561 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
562 log_warning("SO_KEEPALIVE failed: %m");
565 if (s->priority >= 0)
566 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
567 log_warning("SO_PRIORITY failed: %m");
569 if (s->receive_buffer > 0) {
570 int value = (int) s->receive_buffer;
571 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
572 log_warning("SO_RCVBUF failed: %m");
575 if (s->send_buffer > 0) {
576 int value = (int) s->send_buffer;
577 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
578 log_warning("SO_SNDBUF failed: %m");
582 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
583 log_warning("SO_MARK failed: %m");
586 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
587 log_warning("IP_TOS failed: %m");
589 if (s->ip_ttl >= 0) {
592 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
593 x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
596 log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
600 static void socket_apply_pipe_options(Socket *s, int fd) {
604 if (s->pipe_size > 0)
605 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
606 log_warning("F_SETPIPE_SZ: %m");
609 static int socket_open_fds(Socket *s) {
615 LIST_FOREACH(port, p, s->ports) {
620 if (p->type == SOCKET_SOCKET) {
622 if ((r = socket_address_listen(
633 socket_apply_socket_options(s, p->fd);
637 assert(p->type == SOCKET_FIFO);
639 mkdir_parents(p->path, s->directory_mode);
641 if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
646 if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
651 if (fstat(p->fd, &st) < 0) {
656 /* FIXME verify user, access mode */
658 if (!S_ISFIFO(st.st_mode)) {
663 socket_apply_pipe_options(s, p->fd);
674 static void socket_unwatch_fds(Socket *s) {
679 LIST_FOREACH(port, p, s->ports) {
683 unit_unwatch_fd(UNIT(s), &p->fd_watch);
687 static int socket_watch_fds(Socket *s) {
693 LIST_FOREACH(port, p, s->ports) {
697 p->fd_watch.socket_accept =
699 p->type == SOCKET_SOCKET &&
700 socket_address_can_accept(&p->address);
702 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
709 socket_unwatch_fds(s);
713 static void socket_set_state(Socket *s, SocketState state) {
714 SocketState old_state;
717 old_state = s->state;
720 if (state != SOCKET_START_PRE &&
721 state != SOCKET_START_POST &&
722 state != SOCKET_STOP_PRE &&
723 state != SOCKET_STOP_PRE_SIGTERM &&
724 state != SOCKET_STOP_PRE_SIGKILL &&
725 state != SOCKET_STOP_POST &&
726 state != SOCKET_FINAL_SIGTERM &&
727 state != SOCKET_FINAL_SIGKILL) {
728 unit_unwatch_timer(UNIT(s), &s->timer_watch);
729 socket_unwatch_control_pid(s);
730 s->control_command = NULL;
731 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
734 if (state != SOCKET_LISTENING)
735 socket_unwatch_fds(s);
737 if (state != SOCKET_START_POST &&
738 state != SOCKET_LISTENING &&
739 state != SOCKET_RUNNING &&
740 state != SOCKET_STOP_PRE &&
741 state != SOCKET_STOP_PRE_SIGTERM &&
742 state != SOCKET_STOP_PRE_SIGKILL)
745 if (state != old_state)
746 log_debug("%s changed %s -> %s",
748 socket_state_to_string(old_state),
749 socket_state_to_string(state));
751 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
754 static int socket_coldplug(Unit *u) {
755 Socket *s = SOCKET(u);
759 assert(s->state == SOCKET_DEAD);
761 if (s->deserialized_state != s->state) {
763 if (s->deserialized_state == SOCKET_START_PRE ||
764 s->deserialized_state == SOCKET_START_POST ||
765 s->deserialized_state == SOCKET_STOP_PRE ||
766 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
767 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
768 s->deserialized_state == SOCKET_STOP_POST ||
769 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
770 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
772 if (s->control_pid <= 0)
775 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
778 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
782 if (s->deserialized_state == SOCKET_START_POST ||
783 s->deserialized_state == SOCKET_LISTENING ||
784 s->deserialized_state == SOCKET_RUNNING ||
785 s->deserialized_state == SOCKET_STOP_PRE ||
786 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
787 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
788 if ((r = socket_open_fds(s)) < 0)
791 if (s->deserialized_state == SOCKET_LISTENING)
792 if ((r = socket_watch_fds(s)) < 0)
795 socket_set_state(s, s->deserialized_state);
801 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
810 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
813 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
822 s->meta.manager->environment,
826 s->meta.manager->confirm_spawn,
827 s->meta.cgroup_bondings,
834 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
835 /* FIXME: we need to do something here */
843 unit_unwatch_timer(UNIT(s), &s->timer_watch);
848 static void socket_enter_dead(Socket *s, bool success) {
854 socket_set_state(s, s->failure ? SOCKET_MAINTENANCE : SOCKET_DEAD);
857 static void socket_enter_signal(Socket *s, SocketState state, bool success);
859 static void socket_enter_stop_post(Socket *s, bool success) {
866 socket_unwatch_control_pid(s);
868 s->control_command_id = SOCKET_EXEC_STOP_POST;
870 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
871 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
874 socket_set_state(s, SOCKET_STOP_POST);
876 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
881 log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
882 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
885 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
894 if (s->kill_mode != KILL_NONE) {
895 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
897 if (s->kill_mode == KILL_CONTROL_GROUP) {
899 if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig)) < 0) {
900 if (r != -EAGAIN && r != -ESRCH)
906 if (!sent && s->control_pid > 0)
907 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
913 if (sent && s->control_pid > 0) {
914 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
917 socket_set_state(s, state);
918 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
919 socket_enter_stop_post(s, true);
921 socket_enter_dead(s, true);
926 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
928 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
929 socket_enter_stop_post(s, false);
931 socket_enter_dead(s, false);
934 static void socket_enter_stop_pre(Socket *s, bool success) {
941 socket_unwatch_control_pid(s);
943 s->control_command_id = SOCKET_EXEC_STOP_PRE;
945 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
946 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
949 socket_set_state(s, SOCKET_STOP_PRE);
951 socket_enter_stop_post(s, true);
956 log_warning("%s failed to run 'stop-pre' task: %s", s->meta.id, strerror(-r));
957 socket_enter_stop_post(s, false);
960 static void socket_enter_listening(Socket *s) {
964 if ((r = socket_watch_fds(s)) < 0) {
965 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
969 socket_set_state(s, SOCKET_LISTENING);
973 socket_enter_stop_pre(s, false);
976 static void socket_enter_start_post(Socket *s) {
980 if ((r = socket_open_fds(s)) < 0) {
981 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
985 socket_unwatch_control_pid(s);
987 s->control_command_id = SOCKET_EXEC_START_POST;
989 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
990 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
991 log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
995 socket_set_state(s, SOCKET_START_POST);
997 socket_enter_listening(s);
1002 socket_enter_stop_pre(s, false);
1005 static void socket_enter_start_pre(Socket *s) {
1009 socket_unwatch_control_pid(s);
1011 s->control_command_id = SOCKET_EXEC_START_PRE;
1013 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
1014 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1017 socket_set_state(s, SOCKET_START_PRE);
1019 socket_enter_start_post(s);
1024 log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
1025 socket_enter_dead(s, false);
1028 static void socket_enter_running(Socket *s, int cfd) {
1033 dbus_error_init(&error);
1036 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, &error, NULL)) < 0)
1039 socket_set_state(s, SOCKET_RUNNING);
1042 char *prefix, *instance = NULL, *name;
1044 if (s->n_connections >= s->max_connections) {
1045 log_warning("Too many incoming connections (%u)", s->n_connections);
1046 close_nointr_nofail(cfd);
1050 if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)) < 0)
1053 if (!(prefix = unit_name_to_prefix(s->meta.id))) {
1059 name = unit_name_build(prefix, instance, ".service");
1068 r = manager_load_unit(s->meta.manager, name, NULL, NULL, &u);
1074 if ((r = service_set_socket_fd(SERVICE(u), cfd, s)) < 0)
1079 s->n_connections ++;
1081 if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, &error, NULL)) < 0)
1088 log_warning("%s failed to queue socket startup job: %s", s->meta.id, bus_error(&error, r));
1089 socket_enter_stop_pre(s, false);
1092 close_nointr_nofail(cfd);
1094 dbus_error_free(&error);
1097 static void socket_run_next(Socket *s, bool success) {
1101 assert(s->control_command);
1102 assert(s->control_command->command_next);
1107 socket_unwatch_control_pid(s);
1109 s->control_command = s->control_command->command_next;
1111 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1117 log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
1119 if (s->state == SOCKET_START_POST)
1120 socket_enter_stop_pre(s, false);
1121 else if (s->state == SOCKET_STOP_POST)
1122 socket_enter_dead(s, false);
1124 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1127 static int socket_start(Unit *u) {
1128 Socket *s = SOCKET(u);
1132 /* We cannot fulfill this request right now, try again later
1134 if (s->state == SOCKET_STOP_PRE ||
1135 s->state == SOCKET_STOP_PRE_SIGKILL ||
1136 s->state == SOCKET_STOP_PRE_SIGTERM ||
1137 s->state == SOCKET_STOP_POST ||
1138 s->state == SOCKET_FINAL_SIGTERM ||
1139 s->state == SOCKET_FINAL_SIGKILL)
1142 if (s->state == SOCKET_START_PRE ||
1143 s->state == SOCKET_START_POST)
1146 /* Cannot run this without the service being around */
1148 if (s->service->meta.load_state != UNIT_LOADED)
1151 /* If the service is alredy actvie we cannot start the
1153 if (s->service->state != SERVICE_DEAD &&
1154 s->service->state != SERVICE_MAINTENANCE &&
1155 s->service->state != SERVICE_AUTO_RESTART)
1159 assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTENANCE);
1162 socket_enter_start_pre(s);
1166 static int socket_stop(Unit *u) {
1167 Socket *s = SOCKET(u);
1171 /* We cannot fulfill this request right now, try again later
1173 if (s->state == SOCKET_START_PRE ||
1174 s->state == SOCKET_START_POST)
1178 if (s->state == SOCKET_STOP_PRE ||
1179 s->state == SOCKET_STOP_PRE_SIGTERM ||
1180 s->state == SOCKET_STOP_PRE_SIGKILL ||
1181 s->state == SOCKET_STOP_POST ||
1182 s->state == SOCKET_FINAL_SIGTERM ||
1183 s->state == SOCKET_FINAL_SIGTERM)
1186 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1188 socket_enter_stop_pre(s, true);
1192 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1193 Socket *s = SOCKET(u);
1201 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1202 unit_serialize_item(u, f, "failure", yes_no(s->failure));
1203 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1205 if (s->control_pid > 0)
1206 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1208 if (s->control_command_id >= 0)
1209 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1211 LIST_FOREACH(port, p, s->ports) {
1217 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1220 if (p->type == SOCKET_SOCKET) {
1223 if ((r = socket_address_print(&p->address, &t)) < 0)
1226 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1229 assert(p->type == SOCKET_FIFO);
1230 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1237 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1238 Socket *s = SOCKET(u);
1246 if (streq(key, "state")) {
1249 if ((state = socket_state_from_string(value)) < 0)
1250 log_debug("Failed to parse state value %s", value);
1252 s->deserialized_state = state;
1253 } else if (streq(key, "failure")) {
1256 if ((b = parse_boolean(value)) < 0)
1257 log_debug("Failed to parse failure value %s", value);
1259 s->failure = b || s->failure;
1261 } else if (streq(key, "n-accepted")) {
1264 if ((r = safe_atou(value, &k)) < 0)
1265 log_debug("Failed to parse n-accepted value %s", value);
1268 } else if (streq(key, "control-pid")) {
1271 if ((r = parse_pid(value, &pid)) < 0)
1272 log_debug("Failed to parse control-pid value %s", value);
1274 s->control_pid = pid;
1275 } else if (streq(key, "control-command")) {
1276 SocketExecCommand id;
1278 if ((id = socket_exec_command_from_string(value)) < 0)
1279 log_debug("Failed to parse exec-command value %s", value);
1281 s->control_command_id = id;
1282 s->control_command = s->exec_command[id];
1284 } else if (streq(key, "fifo")) {
1288 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1289 log_debug("Failed to parse fifo value %s", value);
1292 LIST_FOREACH(port, p, s->ports)
1293 if (streq(p->path, value+skip))
1298 close_nointr_nofail(p->fd);
1299 p->fd = fdset_remove(fds, fd);
1303 } else if (streq(key, "socket")) {
1304 int fd, type, skip = 0;
1307 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1308 log_debug("Failed to parse socket value %s", value);
1311 LIST_FOREACH(port, p, s->ports)
1312 if (socket_address_is(&p->address, value+skip, type))
1317 close_nointr_nofail(p->fd);
1318 p->fd = fdset_remove(fds, fd);
1323 log_debug("Unknown serialization key '%s'", key);
1328 static UnitActiveState socket_active_state(Unit *u) {
1331 return state_translation_table[SOCKET(u)->state];
1334 static const char *socket_sub_state_to_string(Unit *u) {
1337 return socket_state_to_string(SOCKET(u)->state);
1340 static bool socket_check_gc(Unit *u) {
1341 Socket *s = SOCKET(u);
1345 return s->n_connections > 0;
1348 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1349 Socket *s = SOCKET(u);
1355 if (s->state != SOCKET_LISTENING)
1358 log_debug("Incoming traffic on %s", u->meta.id);
1360 if (events != EPOLLIN) {
1361 log_error("Got invalid poll event on socket.");
1365 if (w->socket_accept) {
1368 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1373 log_error("Failed to accept socket: %m");
1380 socket_apply_socket_options(s, cfd);
1383 socket_enter_running(s, cfd);
1387 socket_enter_stop_pre(s, false);
1390 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1391 Socket *s = SOCKET(u);
1397 if (pid != s->control_pid)
1402 success = is_clean_exit(code, status);
1403 s->failure = s->failure || !success;
1405 if (s->control_command)
1406 exec_status_exit(&s->control_command->exec_status, pid, code, status);
1408 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1410 if (s->control_command && s->control_command->command_next && success) {
1411 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1412 socket_run_next(s, success);
1414 s->control_command = NULL;
1415 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1417 /* No further commands for this step, so let's figure
1418 * out what to do next */
1420 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1424 case SOCKET_START_PRE:
1426 socket_enter_start_post(s);
1428 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1431 case SOCKET_START_POST:
1433 socket_enter_listening(s);
1435 socket_enter_stop_pre(s, false);
1438 case SOCKET_STOP_PRE:
1439 case SOCKET_STOP_PRE_SIGTERM:
1440 case SOCKET_STOP_PRE_SIGKILL:
1441 socket_enter_stop_post(s, success);
1444 case SOCKET_STOP_POST:
1445 case SOCKET_FINAL_SIGTERM:
1446 case SOCKET_FINAL_SIGKILL:
1447 socket_enter_dead(s, success);
1451 assert_not_reached("Uh, control process died at wrong time.");
1456 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1457 Socket *s = SOCKET(u);
1460 assert(elapsed == 1);
1461 assert(w == &s->timer_watch);
1465 case SOCKET_START_PRE:
1466 log_warning("%s starting timed out. Terminating.", u->meta.id);
1467 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1469 case SOCKET_START_POST:
1470 log_warning("%s starting timed out. Stopping.", u->meta.id);
1471 socket_enter_stop_pre(s, false);
1474 case SOCKET_STOP_PRE:
1475 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1476 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1479 case SOCKET_STOP_PRE_SIGTERM:
1480 log_warning("%s stopping timed out. Killing.", u->meta.id);
1481 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1484 case SOCKET_STOP_PRE_SIGKILL:
1485 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1486 socket_enter_stop_post(s, false);
1489 case SOCKET_STOP_POST:
1490 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1491 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1494 case SOCKET_FINAL_SIGTERM:
1495 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1496 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1499 case SOCKET_FINAL_SIGKILL:
1500 log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id);
1501 socket_enter_dead(s, false);
1505 assert_not_reached("Timeout at wrong time.");
1509 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1518 /* Called from the service code for requesting our fds */
1521 LIST_FOREACH(port, p, s->ports)
1525 if (!(rfds = new(int, rn_fds)) < 0)
1529 LIST_FOREACH(port, p, s->ports)
1533 assert(k == rn_fds);
1541 void socket_notify_service_dead(Socket *s) {
1544 /* The service is dead. Dang!
1546 * This is strictly for one-instance-for-all-connections
1549 if (s->state == SOCKET_RUNNING) {
1550 log_debug("%s got notified about service death.", s->meta.id);
1551 socket_enter_listening(s);
1555 void socket_connection_unref(Socket *s) {
1558 /* The service is dead. Yay!
1560 * This is strictly for one-onstance-per-connection
1563 assert(s->n_connections > 0);
1566 log_debug("%s: One connection closed, %u left.", s->meta.id, s->n_connections);
1569 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1570 [SOCKET_DEAD] = "dead",
1571 [SOCKET_START_PRE] = "start-pre",
1572 [SOCKET_START_POST] = "start-post",
1573 [SOCKET_LISTENING] = "listening",
1574 [SOCKET_RUNNING] = "running",
1575 [SOCKET_STOP_PRE] = "stop-pre",
1576 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1577 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1578 [SOCKET_STOP_POST] = "stop-post",
1579 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1580 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
1581 [SOCKET_MAINTENANCE] = "maintenance"
1584 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1586 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1587 [SOCKET_EXEC_START_PRE] = "StartPre",
1588 [SOCKET_EXEC_START_POST] = "StartPost",
1589 [SOCKET_EXEC_STOP_PRE] = "StopPre",
1590 [SOCKET_EXEC_STOP_POST] = "StopPost"
1593 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1595 const UnitVTable socket_vtable = {
1596 .suffix = ".socket",
1598 .init = socket_init,
1599 .done = socket_done,
1600 .load = socket_load,
1602 .coldplug = socket_coldplug,
1604 .dump = socket_dump,
1606 .start = socket_start,
1607 .stop = socket_stop,
1609 .serialize = socket_serialize,
1610 .deserialize_item = socket_deserialize_item,
1612 .active_state = socket_active_state,
1613 .sub_state_to_string = socket_sub_state_to_string,
1615 .check_gc = socket_check_gc,
1617 .fd_event = socket_fd_event,
1618 .sigchld_event = socket_sigchld_event,
1619 .timer_event = socket_timer_event,
1621 .bus_message_handler = bus_socket_message_handler