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 exec_context_init(&s->exec_context);
68 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
71 static void socket_unwatch_control_pid(Socket *s) {
74 if (s->control_pid <= 0)
77 unit_unwatch_pid(UNIT(s), s->control_pid);
81 static void socket_done(Unit *u) {
82 Socket *s = SOCKET(u);
87 while ((p = s->ports)) {
88 LIST_REMOVE(SocketPort, port, s->ports, p);
91 unit_unwatch_fd(UNIT(s), &p->fd_watch);
92 close_nointr_nofail(p->fd);
99 exec_context_done(&s->exec_context);
100 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
101 s->control_command = NULL;
103 socket_unwatch_control_pid(s);
107 free(s->bind_to_device);
108 s->bind_to_device = NULL;
110 unit_unwatch_timer(u, &s->timer_watch);
113 static bool have_non_accept_socket(Socket *s) {
121 LIST_FOREACH(port, p, s->ports) {
123 if (p->type != SOCKET_SOCKET)
126 if (!socket_address_can_accept(&p->address))
133 static int socket_verify(Socket *s) {
136 if (UNIT(s)->meta.load_state != UNIT_LOADED)
140 log_error("%s lacks Listen setting. Refusing.", UNIT(s)->meta.id);
147 static bool socket_needs_mount(Socket *s, const char *prefix) {
152 LIST_FOREACH(port, p, s->ports) {
154 if (p->type == SOCKET_SOCKET) {
155 if (socket_address_needs_mount(&p->address, prefix))
158 assert(p->type == SOCKET_FIFO);
159 if (path_startswith(p->path, prefix))
167 int socket_add_one_mount_link(Socket *s, Mount *m) {
173 if (s->meta.load_state != UNIT_LOADED ||
174 m->meta.load_state != UNIT_LOADED)
177 if (!socket_needs_mount(s, m->where))
180 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(s), true)) < 0)
183 if ((r = unit_add_dependency(UNIT(s), UNIT_REQUIRES, UNIT(m), true)) < 0)
189 static int socket_add_mount_links(Socket *s) {
195 LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
196 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
202 static int socket_add_device_link(Socket *s) {
208 if (!s->bind_to_device)
211 if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
214 r = unit_add_node_link(UNIT(s), t, false);
220 static int socket_load(Unit *u) {
221 Socket *s = SOCKET(u);
225 assert(u->meta.load_state == UNIT_STUB);
227 if ((r = unit_load_fragment_and_dropin(u)) < 0)
230 /* This is a new unit? Then let's add in some extras */
231 if (u->meta.load_state == UNIT_LOADED) {
233 if (have_non_accept_socket(s)) {
234 if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)))
237 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
241 if ((r = socket_add_mount_links(s)) < 0)
244 if ((r = socket_add_device_link(s)) < 0)
247 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
250 if ((r = unit_add_default_cgroup(u)) < 0)
254 return socket_verify(s);
257 static const char* listen_lookup(int type) {
259 if (type == SOCK_STREAM)
260 return "ListenStream";
261 else if (type == SOCK_DGRAM)
262 return "ListenDatagram";
263 else if (type == SOCK_SEQPACKET)
264 return "ListenSequentialPacket";
266 assert_not_reached("Unknown socket type");
270 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
273 Socket *s = SOCKET(u);
281 p2 = strappend(prefix, "\t");
282 prefix2 = p2 ? p2 : prefix;
285 "%sSocket State: %s\n"
286 "%sBindIPv6Only: %s\n"
289 "%sSocketMode: %04o\n"
290 "%sDirectoryMode: %04o\n",
291 prefix, socket_state_to_string(s->state),
292 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
294 prefix, kill_mode_to_string(s->kill_mode),
295 prefix, s->socket_mode,
296 prefix, s->directory_mode);
298 if (s->control_pid > 0)
300 "%sControl PID: %llu\n",
301 prefix, (unsigned long long) s->control_pid);
303 if (s->bind_to_device)
305 "%sBindToDevice: %s\n",
306 prefix, s->bind_to_device);
311 prefix, s->n_accepted);
313 LIST_FOREACH(port, p, s->ports) {
315 if (p->type == SOCKET_SOCKET) {
320 if ((r = socket_address_print(&p->address, &k)) < 0)
325 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
328 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
331 exec_context_dump(&s->exec_context, f, prefix);
333 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
334 if (!s->exec_command[c])
337 fprintf(f, "%s-> %s:\n",
338 prefix, socket_exec_command_to_string(c));
340 exec_command_dump_list(s->exec_command[c], f, prefix2);
346 static int instance_from_socket(int fd, unsigned nr, char **instance) {
351 struct sockaddr_un un;
352 struct sockaddr_in in;
353 struct sockaddr_in6 in6;
354 struct sockaddr_storage storage;
361 if (getsockname(fd, &local.sa, &l) < 0)
365 if (getpeername(fd, &remote.sa, &l) < 0)
368 switch (local.sa.sa_family) {
372 a = ntohl(local.in.sin_addr.s_addr),
373 b = ntohl(remote.in.sin_addr.s_addr);
376 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
378 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
379 ntohs(local.in.sin_port),
380 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
381 ntohs(remote.in.sin_port)) < 0)
388 static const char ipv4_prefix[] = {
389 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
392 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
393 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
395 *a = local.in6.sin6_addr.s6_addr+12,
396 *b = remote.in6.sin6_addr.s6_addr+12;
399 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
401 a[0], a[1], a[2], a[3],
402 ntohs(local.in6.sin6_port),
403 b[0], b[1], b[2], b[3],
404 ntohs(remote.in6.sin6_port)) < 0)
407 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
412 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
413 ntohs(local.in6.sin6_port),
414 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
415 ntohs(remote.in6.sin6_port)) < 0)
426 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
432 (unsigned long long) ucred.pid,
433 (unsigned long long) ucred.uid) < 0)
440 assert_not_reached("Unhandled socket type.");
447 static void socket_close_fds(Socket *s) {
452 LIST_FOREACH(port, p, s->ports) {
456 unit_unwatch_fd(UNIT(s), &p->fd_watch);
457 close_nointr_nofail(p->fd);
459 /* One little note: we should never delete any sockets
460 * in the file system here! After all some other
461 * process we spawned might still have a reference of
462 * this fd and wants to continue to use it. Therefore
463 * we delete sockets in the file system before we
464 * create a new one, not after we stopped using
471 static int socket_open_fds(Socket *s) {
477 LIST_FOREACH(port, p, s->ports) {
482 if (p->type == SOCKET_SOCKET) {
484 if ((r = socket_address_listen(
496 assert(p->type == SOCKET_FIFO);
498 mkdir_parents(p->path, s->directory_mode);
500 if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
505 if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
510 if (fstat(p->fd, &st) < 0) {
515 /* FIXME verify user, access mode */
517 if (!S_ISFIFO(st.st_mode)) {
531 static void socket_unwatch_fds(Socket *s) {
536 LIST_FOREACH(port, p, s->ports) {
540 unit_unwatch_fd(UNIT(s), &p->fd_watch);
544 static int socket_watch_fds(Socket *s) {
550 LIST_FOREACH(port, p, s->ports) {
554 p->fd_watch.socket_accept =
556 p->type == SOCKET_SOCKET &&
557 socket_address_can_accept(&p->address);
559 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
566 socket_unwatch_fds(s);
570 static void socket_set_state(Socket *s, SocketState state) {
571 SocketState old_state;
574 old_state = s->state;
577 if (state != SOCKET_START_PRE &&
578 state != SOCKET_START_POST &&
579 state != SOCKET_STOP_PRE &&
580 state != SOCKET_STOP_PRE_SIGTERM &&
581 state != SOCKET_STOP_PRE_SIGKILL &&
582 state != SOCKET_STOP_POST &&
583 state != SOCKET_FINAL_SIGTERM &&
584 state != SOCKET_FINAL_SIGKILL) {
585 unit_unwatch_timer(UNIT(s), &s->timer_watch);
586 socket_unwatch_control_pid(s);
587 s->control_command = NULL;
588 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
591 if (state != SOCKET_LISTENING)
592 socket_unwatch_fds(s);
594 if (state != SOCKET_START_POST &&
595 state != SOCKET_LISTENING &&
596 state != SOCKET_RUNNING &&
597 state != SOCKET_STOP_PRE &&
598 state != SOCKET_STOP_PRE_SIGTERM &&
599 state != SOCKET_STOP_PRE_SIGKILL)
602 if (state != old_state)
603 log_debug("%s changed %s -> %s",
605 socket_state_to_string(old_state),
606 socket_state_to_string(state));
608 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
611 static int socket_coldplug(Unit *u) {
612 Socket *s = SOCKET(u);
616 assert(s->state == SOCKET_DEAD);
618 if (s->deserialized_state != s->state) {
620 if (s->deserialized_state == SOCKET_START_PRE ||
621 s->deserialized_state == SOCKET_START_POST ||
622 s->deserialized_state == SOCKET_STOP_PRE ||
623 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
624 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
625 s->deserialized_state == SOCKET_STOP_POST ||
626 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
627 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
629 if (s->control_pid <= 0)
632 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
635 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
639 if (s->deserialized_state == SOCKET_START_POST ||
640 s->deserialized_state == SOCKET_LISTENING ||
641 s->deserialized_state == SOCKET_RUNNING ||
642 s->deserialized_state == SOCKET_STOP_PRE ||
643 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
644 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
645 if ((r = socket_open_fds(s)) < 0)
648 if (s->deserialized_state == SOCKET_LISTENING)
649 if ((r = socket_watch_fds(s)) < 0)
652 socket_set_state(s, s->deserialized_state);
658 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
667 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
670 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
679 s->meta.manager->environment,
682 UNIT(s)->meta.manager->confirm_spawn,
683 UNIT(s)->meta.cgroup_bondings,
690 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
691 /* FIXME: we need to do something here */
699 unit_unwatch_timer(UNIT(s), &s->timer_watch);
704 static void socket_enter_dead(Socket *s, bool success) {
710 socket_set_state(s, s->failure ? SOCKET_MAINTENANCE : SOCKET_DEAD);
713 static void socket_enter_signal(Socket *s, SocketState state, bool success);
715 static void socket_enter_stop_post(Socket *s, bool success) {
722 socket_unwatch_control_pid(s);
724 s->control_command_id = SOCKET_EXEC_STOP_POST;
726 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
727 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
730 socket_set_state(s, SOCKET_STOP_POST);
732 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
737 log_warning("%s failed to run stop-post executable: %s", s->meta.id, strerror(-r));
738 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
741 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
750 if (s->kill_mode != KILL_NONE) {
751 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
753 if (s->kill_mode == KILL_CONTROL_GROUP) {
755 if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
756 if (r != -EAGAIN && r != -ESRCH)
762 if (!sent && s->control_pid > 0)
763 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
769 if (sent && s->control_pid > 0) {
770 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
773 socket_set_state(s, state);
774 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
775 socket_enter_stop_post(s, true);
777 socket_enter_dead(s, true);
782 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
784 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
785 socket_enter_stop_post(s, false);
787 socket_enter_dead(s, false);
790 static void socket_enter_stop_pre(Socket *s, bool success) {
797 socket_unwatch_control_pid(s);
799 s->control_command_id = SOCKET_EXEC_STOP_PRE;
801 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
802 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
805 socket_set_state(s, SOCKET_STOP_PRE);
807 socket_enter_stop_post(s, true);
812 log_warning("%s failed to run stop-pre executable: %s", s->meta.id, strerror(-r));
813 socket_enter_stop_post(s, false);
816 static void socket_enter_listening(Socket *s) {
820 if ((r = socket_watch_fds(s)) < 0) {
821 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
825 socket_set_state(s, SOCKET_LISTENING);
829 socket_enter_stop_pre(s, false);
832 static void socket_enter_start_post(Socket *s) {
836 if ((r = socket_open_fds(s)) < 0) {
837 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
841 socket_unwatch_control_pid(s);
843 s->control_command_id = SOCKET_EXEC_START_POST;
845 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
846 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
847 log_warning("%s failed to run start-post executable: %s", s->meta.id, strerror(-r));
851 socket_set_state(s, SOCKET_START_POST);
853 socket_enter_listening(s);
858 socket_enter_stop_pre(s, false);
861 static void socket_enter_start_pre(Socket *s) {
865 socket_unwatch_control_pid(s);
867 s->control_command_id = SOCKET_EXEC_START_PRE;
869 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
870 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
873 socket_set_state(s, SOCKET_START_PRE);
875 socket_enter_start_post(s);
880 log_warning("%s failed to run start-pre exectuable: %s", s->meta.id, strerror(-r));
881 socket_enter_dead(s, false);
884 static void socket_enter_running(Socket *s, int cfd) {
890 if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
893 socket_set_state(s, SOCKET_RUNNING);
896 char *prefix, *instance, *name;
898 if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)) < 0)
901 if (!(prefix = unit_name_to_prefix(UNIT(s)->meta.id))) {
907 name = unit_name_build(prefix, instance, ".service");
916 r = manager_load_unit(UNIT(s)->meta.manager, name, NULL, &u);
922 if ((r = service_set_socket_fd(SERVICE(u), cfd)) < 0)
927 if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, NULL)) < 0)
934 log_warning("%s failed to queue socket startup job: %s", s->meta.id, strerror(-r));
935 socket_enter_stop_pre(s, false);
938 close_nointr_nofail(cfd);
941 static void socket_run_next(Socket *s, bool success) {
945 assert(s->control_command);
946 assert(s->control_command->command_next);
951 socket_unwatch_control_pid(s);
953 s->control_command = s->control_command->command_next;
955 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
961 log_warning("%s failed to run spawn next executable: %s", s->meta.id, strerror(-r));
963 if (s->state == SOCKET_START_POST)
964 socket_enter_stop_pre(s, false);
965 else if (s->state == SOCKET_STOP_POST)
966 socket_enter_dead(s, false);
968 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
971 static int socket_start(Unit *u) {
972 Socket *s = SOCKET(u);
976 /* We cannot fulfill this request right now, try again later
978 if (s->state == SOCKET_STOP_PRE ||
979 s->state == SOCKET_STOP_PRE_SIGKILL ||
980 s->state == SOCKET_STOP_PRE_SIGTERM ||
981 s->state == SOCKET_STOP_POST ||
982 s->state == SOCKET_FINAL_SIGTERM ||
983 s->state == SOCKET_FINAL_SIGKILL)
986 if (s->state == SOCKET_START_PRE ||
987 s->state == SOCKET_START_POST)
990 /* Cannot run this without the service being around */
992 if (s->service->meta.load_state != UNIT_LOADED)
995 /* If the service is alredy actvie we cannot start the
997 if (s->service->state != SERVICE_DEAD &&
998 s->service->state != SERVICE_MAINTENANCE &&
999 s->service->state != SERVICE_AUTO_RESTART)
1003 assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTENANCE);
1006 socket_enter_start_pre(s);
1010 static int socket_stop(Unit *u) {
1011 Socket *s = SOCKET(u);
1015 /* We cannot fulfill this request right now, try again later
1017 if (s->state == SOCKET_START_PRE ||
1018 s->state == SOCKET_START_POST)
1022 if (s->state == SOCKET_STOP_PRE ||
1023 s->state == SOCKET_STOP_PRE_SIGTERM ||
1024 s->state == SOCKET_STOP_PRE_SIGKILL ||
1025 s->state == SOCKET_STOP_POST ||
1026 s->state == SOCKET_FINAL_SIGTERM ||
1027 s->state == SOCKET_FINAL_SIGTERM)
1030 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1032 socket_enter_stop_pre(s, true);
1036 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1037 Socket *s = SOCKET(u);
1045 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1046 unit_serialize_item(u, f, "failure", yes_no(s->failure));
1047 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1049 if (s->control_pid > 0)
1050 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1052 if (s->control_command_id >= 0)
1053 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1055 LIST_FOREACH(port, p, s->ports) {
1061 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1064 if (p->type == SOCKET_SOCKET) {
1067 if ((r = socket_address_print(&p->address, &t)) < 0)
1070 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1073 assert(p->type == SOCKET_FIFO);
1074 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1081 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1082 Socket *s = SOCKET(u);
1090 if (streq(key, "state")) {
1093 if ((state = socket_state_from_string(value)) < 0)
1094 log_debug("Failed to parse state value %s", value);
1096 s->deserialized_state = state;
1097 } else if (streq(key, "failure")) {
1100 if ((b = parse_boolean(value)) < 0)
1101 log_debug("Failed to parse failure value %s", value);
1103 s->failure = b || s->failure;
1105 } else if (streq(key, "n-accepted")) {
1108 if ((r = safe_atou(value, &k)) < 0)
1109 log_debug("Failed to parse n-accepted value %s", value);
1112 } else if (streq(key, "control-pid")) {
1115 if ((r = parse_pid(value, &pid)) < 0)
1116 log_debug("Failed to parse control-pid value %s", value);
1118 s->control_pid = pid;
1119 } else if (streq(key, "control-command")) {
1120 SocketExecCommand id;
1122 if ((id = socket_exec_command_from_string(value)) < 0)
1123 log_debug("Failed to parse exec-command value %s", value);
1125 s->control_command_id = id;
1126 s->control_command = s->exec_command[id];
1128 } else if (streq(key, "fifo")) {
1132 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1133 log_debug("Failed to parse fifo value %s", value);
1136 LIST_FOREACH(port, p, s->ports)
1137 if (streq(p->path, value+skip))
1142 close_nointr_nofail(p->fd);
1143 p->fd = fdset_remove(fds, fd);
1147 } else if (streq(key, "socket")) {
1148 int fd, type, skip = 0;
1151 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1152 log_debug("Failed to parse socket value %s", value);
1155 LIST_FOREACH(port, p, s->ports)
1156 if (socket_address_is(&p->address, value+skip, type))
1161 close_nointr_nofail(p->fd);
1162 p->fd = fdset_remove(fds, fd);
1167 log_debug("Unknown serialization key '%s'", key);
1172 static UnitActiveState socket_active_state(Unit *u) {
1175 return state_translation_table[SOCKET(u)->state];
1178 static const char *socket_sub_state_to_string(Unit *u) {
1181 return socket_state_to_string(SOCKET(u)->state);
1184 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1185 Socket *s = SOCKET(u);
1191 if (s->state != SOCKET_LISTENING)
1194 log_debug("Incoming traffic on %s", u->meta.id);
1196 if (events != EPOLLIN) {
1197 log_error("Got invalid poll event on socket.");
1201 if (w->socket_accept) {
1204 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1209 log_error("Failed to accept socket: %m");
1217 socket_enter_running(s, cfd);
1221 socket_enter_stop_pre(s, false);
1224 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1225 Socket *s = SOCKET(u);
1231 if (pid != s->control_pid)
1236 success = is_clean_exit(code, status);
1237 s->failure = s->failure || !success;
1239 if (s->control_command)
1240 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1242 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1244 if (s->control_command && s->control_command->command_next && success) {
1245 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1246 socket_run_next(s, success);
1248 s->control_command = NULL;
1249 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1251 /* No further commands for this step, so let's figure
1252 * out what to do next */
1254 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1258 case SOCKET_START_PRE:
1260 socket_enter_start_post(s);
1262 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1265 case SOCKET_START_POST:
1267 socket_enter_listening(s);
1269 socket_enter_stop_pre(s, false);
1272 case SOCKET_STOP_PRE:
1273 case SOCKET_STOP_PRE_SIGTERM:
1274 case SOCKET_STOP_PRE_SIGKILL:
1275 socket_enter_stop_post(s, success);
1278 case SOCKET_STOP_POST:
1279 case SOCKET_FINAL_SIGTERM:
1280 case SOCKET_FINAL_SIGKILL:
1281 socket_enter_dead(s, success);
1285 assert_not_reached("Uh, control process died at wrong time.");
1290 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1291 Socket *s = SOCKET(u);
1294 assert(elapsed == 1);
1295 assert(w == &s->timer_watch);
1299 case SOCKET_START_PRE:
1300 log_warning("%s starting timed out. Terminating.", u->meta.id);
1301 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1303 case SOCKET_START_POST:
1304 log_warning("%s starting timed out. Stopping.", u->meta.id);
1305 socket_enter_stop_pre(s, false);
1308 case SOCKET_STOP_PRE:
1309 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1310 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1313 case SOCKET_STOP_PRE_SIGTERM:
1314 log_warning("%s stopping timed out. Killing.", u->meta.id);
1315 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1318 case SOCKET_STOP_PRE_SIGKILL:
1319 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1320 socket_enter_stop_post(s, false);
1323 case SOCKET_STOP_POST:
1324 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1325 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1328 case SOCKET_FINAL_SIGTERM:
1329 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1330 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1333 case SOCKET_FINAL_SIGKILL:
1334 log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id);
1335 socket_enter_dead(s, false);
1339 assert_not_reached("Timeout at wrong time.");
1343 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1352 /* Called from the service code for requesting our fds */
1355 LIST_FOREACH(port, p, s->ports)
1359 if (!(rfds = new(int, rn_fds)) < 0)
1363 LIST_FOREACH(port, p, s->ports)
1367 assert(k == rn_fds);
1375 void socket_notify_service_dead(Socket *s) {
1378 /* The service is dead. Dang. */
1380 if (s->state == SOCKET_RUNNING) {
1381 log_debug("%s got notified about service death.", s->meta.id);
1382 socket_enter_listening(s);
1386 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1387 [SOCKET_DEAD] = "dead",
1388 [SOCKET_START_PRE] = "start-pre",
1389 [SOCKET_START_POST] = "start-post",
1390 [SOCKET_LISTENING] = "listening",
1391 [SOCKET_RUNNING] = "running",
1392 [SOCKET_STOP_PRE] = "stop-pre",
1393 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1394 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1395 [SOCKET_STOP_POST] = "stop-post",
1396 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1397 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
1398 [SOCKET_MAINTENANCE] = "maintenance"
1401 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1403 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1404 [SOCKET_EXEC_START_PRE] = "StartPre",
1405 [SOCKET_EXEC_START_POST] = "StartPost",
1406 [SOCKET_EXEC_STOP_PRE] = "StopPre",
1407 [SOCKET_EXEC_STOP_POST] = "StopPost"
1410 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1412 const UnitVTable socket_vtable = {
1413 .suffix = ".socket",
1415 .init = socket_init,
1416 .done = socket_done,
1417 .load = socket_load,
1419 .coldplug = socket_coldplug,
1421 .dump = socket_dump,
1423 .start = socket_start,
1424 .stop = socket_stop,
1426 .serialize = socket_serialize,
1427 .deserialize_item = socket_deserialize_item,
1429 .active_state = socket_active_state,
1430 .sub_state_to_string = socket_sub_state_to_string,
1432 .fd_event = socket_fd_event,
1433 .sigchld_event = socket_sigchld_event,
1434 .timer_event = socket_timer_event,
1436 .bus_message_handler = bus_socket_message_handler