1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include <sys/types.h>
27 #include <sys/epoll.h>
29 #include <arpa/inet.h>
34 #include "load-dropin.h"
35 #include "load-fragment.h"
37 #include "unit-name.h"
38 #include "dbus-socket.h"
40 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
41 [SOCKET_DEAD] = UNIT_INACTIVE,
42 [SOCKET_START_PRE] = UNIT_ACTIVATING,
43 [SOCKET_START_POST] = UNIT_ACTIVATING,
44 [SOCKET_LISTENING] = UNIT_ACTIVE,
45 [SOCKET_RUNNING] = UNIT_ACTIVE,
46 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
47 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
48 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
49 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
50 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
51 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
52 [SOCKET_MAINTAINANCE] = UNIT_INACTIVE,
55 static void socket_init(Unit *u) {
56 Socket *s = SOCKET(u);
59 assert(u->meta.load_state == UNIT_STUB);
61 s->timer_watch.type = WATCH_INVALID;
62 s->backlog = SOMAXCONN;
63 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
64 s->directory_mode = 0755;
65 s->socket_mode = 0666;
67 exec_context_init(&s->exec_context);
69 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
72 static void socket_unwatch_control_pid(Socket *s) {
75 if (s->control_pid <= 0)
78 unit_unwatch_pid(UNIT(s), s->control_pid);
82 static void socket_done(Unit *u) {
83 Socket *s = SOCKET(u);
88 while ((p = s->ports)) {
89 LIST_REMOVE(SocketPort, port, s->ports, p);
92 unit_unwatch_fd(UNIT(s), &p->fd_watch);
93 close_nointr_nofail(p->fd);
100 exec_context_done(&s->exec_context);
101 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
102 s->control_command = NULL;
104 socket_unwatch_control_pid(s);
108 free(s->bind_to_device);
109 s->bind_to_device = NULL;
111 unit_unwatch_timer(u, &s->timer_watch);
114 static bool have_non_accept_socket(Socket *s) {
122 LIST_FOREACH(port, p, s->ports) {
124 if (p->type != SOCKET_SOCKET)
127 if (!socket_address_can_accept(&p->address))
134 static int socket_verify(Socket *s) {
137 if (UNIT(s)->meta.load_state != UNIT_LOADED)
141 log_error("%s lacks Listen setting. Refusing.", UNIT(s)->meta.id);
148 static bool socket_needs_mount(Socket *s, const char *prefix) {
153 LIST_FOREACH(port, p, s->ports) {
155 if (p->type == SOCKET_SOCKET) {
156 if (socket_address_needs_mount(&p->address, prefix))
159 assert(p->type == SOCKET_FIFO);
160 if (path_startswith(p->path, prefix))
168 int socket_add_one_mount_link(Socket *s, Mount *m) {
174 if (s->meta.load_state != UNIT_LOADED ||
175 m->meta.load_state != UNIT_LOADED)
178 if (!socket_needs_mount(s, m->where))
181 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(s), true)) < 0)
184 if ((r = unit_add_dependency(UNIT(s), UNIT_REQUIRES, UNIT(m), true)) < 0)
190 static int socket_add_mount_links(Socket *s) {
196 LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
197 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
203 static int socket_add_device_link(Socket *s) {
209 if (!s->bind_to_device)
212 if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
215 r = unit_add_node_link(UNIT(s), t, false);
221 static int socket_load(Unit *u) {
222 Socket *s = SOCKET(u);
226 assert(u->meta.load_state == UNIT_STUB);
228 if ((r = unit_load_fragment_and_dropin(u)) < 0)
231 /* This is a new unit? Then let's add in some extras */
232 if (u->meta.load_state == UNIT_LOADED) {
234 if (have_non_accept_socket(s)) {
235 if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)))
238 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
242 if ((r = socket_add_mount_links(s)) < 0)
245 if ((r = socket_add_device_link(s)) < 0)
248 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
251 if ((r = unit_add_default_cgroup(u)) < 0)
255 return socket_verify(s);
258 static const char* listen_lookup(int type) {
260 if (type == SOCK_STREAM)
261 return "ListenStream";
262 else if (type == SOCK_DGRAM)
263 return "ListenDatagram";
264 else if (type == SOCK_SEQPACKET)
265 return "ListenSequentialPacket";
267 assert_not_reached("Unknown socket type");
271 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
274 Socket *s = SOCKET(u);
282 p2 = strappend(prefix, "\t");
283 prefix2 = p2 ? p2 : prefix;
286 "%sSocket State: %s\n"
287 "%sBindIPv6Only: %s\n"
290 "%sSocketMode: %04o\n"
291 "%sDirectoryMode: %04o\n",
292 prefix, socket_state_to_string(s->state),
293 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
295 prefix, kill_mode_to_string(s->kill_mode),
296 prefix, s->socket_mode,
297 prefix, s->directory_mode);
299 if (s->control_pid > 0)
301 "%sControl PID: %llu\n",
302 prefix, (unsigned long long) s->control_pid);
304 if (s->bind_to_device)
306 "%sBindToDevice: %s\n",
307 prefix, s->bind_to_device);
312 prefix, s->n_accepted);
314 LIST_FOREACH(port, p, s->ports) {
316 if (p->type == SOCKET_SOCKET) {
321 if ((r = socket_address_print(&p->address, &k)) < 0)
326 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
329 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
332 exec_context_dump(&s->exec_context, f, prefix);
334 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
335 if (!s->exec_command[c])
338 fprintf(f, "%s-> %s:\n",
339 prefix, socket_exec_command_to_string(c));
341 exec_command_dump_list(s->exec_command[c], f, prefix2);
347 static int instance_from_socket(int fd, unsigned nr, char **instance) {
352 struct sockaddr_un un;
353 struct sockaddr_in in;
354 struct sockaddr_in6 in6;
355 struct sockaddr_storage storage;
362 if (getsockname(fd, &local.sa, &l) < 0)
366 if (getpeername(fd, &remote.sa, &l) < 0)
369 switch (local.sa.sa_family) {
373 a = ntohl(local.in.sin_addr.s_addr),
374 b = ntohl(remote.in.sin_addr.s_addr);
377 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
379 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
380 ntohs(local.in.sin_port),
381 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
382 ntohs(remote.in.sin_port)) < 0)
389 static const char ipv4_prefix[] = {
390 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
393 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
394 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
396 *a = local.in6.sin6_addr.s6_addr+12,
397 *b = remote.in6.sin6_addr.s6_addr+12;
400 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
402 a[0], a[1], a[2], a[3],
403 ntohs(local.in6.sin6_port),
404 b[0], b[1], b[2], b[3],
405 ntohs(remote.in6.sin6_port)) < 0)
408 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
413 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
414 ntohs(local.in6.sin6_port),
415 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
416 ntohs(remote.in6.sin6_port)) < 0)
427 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
433 (unsigned long long) ucred.pid,
434 (unsigned long long) ucred.uid) < 0)
441 assert_not_reached("Unhandled socket type.");
448 static void socket_close_fds(Socket *s) {
453 LIST_FOREACH(port, p, s->ports) {
457 unit_unwatch_fd(UNIT(s), &p->fd_watch);
458 close_nointr_nofail(p->fd);
460 /* One little note: we should never delete any sockets
461 * in the file system here! After all some other
462 * process we spawned might still have a reference of
463 * this fd and wants to continue to use it. Therefore
464 * we delete sockets in the file system before we
465 * create a new one, not after we stopped using
472 static int socket_open_fds(Socket *s) {
478 LIST_FOREACH(port, p, s->ports) {
483 if (p->type == SOCKET_SOCKET) {
485 if ((r = socket_address_listen(
497 assert(p->type == SOCKET_FIFO);
499 mkdir_parents(p->path, s->directory_mode);
501 if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
506 if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
511 if (fstat(p->fd, &st) < 0) {
516 /* FIXME verify user, access mode */
518 if (!S_ISFIFO(st.st_mode)) {
532 static void socket_unwatch_fds(Socket *s) {
537 LIST_FOREACH(port, p, s->ports) {
541 unit_unwatch_fd(UNIT(s), &p->fd_watch);
545 static int socket_watch_fds(Socket *s) {
551 LIST_FOREACH(port, p, s->ports) {
555 p->fd_watch.socket_accept =
557 p->type == SOCKET_SOCKET &&
558 socket_address_can_accept(&p->address);
560 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
567 socket_unwatch_fds(s);
571 static void socket_set_state(Socket *s, SocketState state) {
572 SocketState old_state;
575 old_state = s->state;
578 if (state != SOCKET_START_PRE &&
579 state != SOCKET_START_POST &&
580 state != SOCKET_STOP_PRE &&
581 state != SOCKET_STOP_PRE_SIGTERM &&
582 state != SOCKET_STOP_PRE_SIGKILL &&
583 state != SOCKET_STOP_POST &&
584 state != SOCKET_FINAL_SIGTERM &&
585 state != SOCKET_FINAL_SIGKILL) {
586 unit_unwatch_timer(UNIT(s), &s->timer_watch);
587 socket_unwatch_control_pid(s);
588 s->control_command = NULL;
589 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
592 if (state != SOCKET_LISTENING)
593 socket_unwatch_fds(s);
595 if (state != SOCKET_START_POST &&
596 state != SOCKET_LISTENING &&
597 state != SOCKET_RUNNING &&
598 state != SOCKET_STOP_PRE &&
599 state != SOCKET_STOP_PRE_SIGTERM &&
600 state != SOCKET_STOP_PRE_SIGKILL)
603 if (state != old_state)
604 log_debug("%s changed %s -> %s",
606 socket_state_to_string(old_state),
607 socket_state_to_string(state));
609 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
612 static int socket_coldplug(Unit *u) {
613 Socket *s = SOCKET(u);
617 assert(s->state == SOCKET_DEAD);
619 if (s->deserialized_state != s->state) {
621 if (s->deserialized_state == SOCKET_START_PRE ||
622 s->deserialized_state == SOCKET_START_POST ||
623 s->deserialized_state == SOCKET_STOP_PRE ||
624 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
625 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
626 s->deserialized_state == SOCKET_STOP_POST ||
627 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
628 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
630 if (s->control_pid <= 0)
633 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
636 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
640 if (s->deserialized_state == SOCKET_START_POST ||
641 s->deserialized_state == SOCKET_LISTENING ||
642 s->deserialized_state == SOCKET_RUNNING ||
643 s->deserialized_state == SOCKET_STOP_PRE ||
644 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
645 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
646 if ((r = socket_open_fds(s)) < 0)
649 if (s->deserialized_state == SOCKET_LISTENING)
650 if ((r = socket_watch_fds(s)) < 0)
653 socket_set_state(s, s->deserialized_state);
659 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
668 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
671 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
680 s->meta.manager->environment,
683 UNIT(s)->meta.manager->confirm_spawn,
684 UNIT(s)->meta.cgroup_bondings,
691 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
692 /* FIXME: we need to do something here */
700 unit_unwatch_timer(UNIT(s), &s->timer_watch);
705 static void socket_enter_dead(Socket *s, bool success) {
711 socket_set_state(s, s->failure ? SOCKET_MAINTAINANCE : SOCKET_DEAD);
714 static void socket_enter_signal(Socket *s, SocketState state, bool success);
716 static void socket_enter_stop_post(Socket *s, bool success) {
723 socket_unwatch_control_pid(s);
725 s->control_command_id = SOCKET_EXEC_STOP_POST;
727 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
728 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
731 socket_set_state(s, SOCKET_STOP_POST);
733 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
738 log_warning("%s failed to run stop-post executable: %s", s->meta.id, strerror(-r));
739 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
742 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
751 if (s->kill_mode != KILL_NONE) {
752 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
754 if (s->kill_mode == KILL_CONTROL_GROUP) {
756 if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
757 if (r != -EAGAIN && r != -ESRCH)
763 if (!sent && s->control_pid > 0)
764 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
770 if (sent && s->control_pid > 0) {
771 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
774 socket_set_state(s, state);
775 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
776 socket_enter_stop_post(s, true);
778 socket_enter_dead(s, true);
783 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
785 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
786 socket_enter_stop_post(s, false);
788 socket_enter_dead(s, false);
791 static void socket_enter_stop_pre(Socket *s, bool success) {
798 socket_unwatch_control_pid(s);
800 s->control_command_id = SOCKET_EXEC_STOP_PRE;
802 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
803 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
806 socket_set_state(s, SOCKET_STOP_PRE);
808 socket_enter_stop_post(s, true);
813 log_warning("%s failed to run stop-pre executable: %s", s->meta.id, strerror(-r));
814 socket_enter_stop_post(s, false);
817 static void socket_enter_listening(Socket *s) {
821 if ((r = socket_watch_fds(s)) < 0) {
822 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
826 socket_set_state(s, SOCKET_LISTENING);
830 socket_enter_stop_pre(s, false);
833 static void socket_enter_start_post(Socket *s) {
837 if ((r = socket_open_fds(s)) < 0) {
838 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
842 socket_unwatch_control_pid(s);
844 s->control_command_id = SOCKET_EXEC_START_POST;
846 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
847 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
848 log_warning("%s failed to run start-post executable: %s", s->meta.id, strerror(-r));
852 socket_set_state(s, SOCKET_START_POST);
854 socket_enter_listening(s);
859 socket_enter_stop_pre(s, false);
862 static void socket_enter_start_pre(Socket *s) {
866 socket_unwatch_control_pid(s);
868 s->control_command_id = SOCKET_EXEC_START_PRE;
870 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
871 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
874 socket_set_state(s, SOCKET_START_PRE);
876 socket_enter_start_post(s);
881 log_warning("%s failed to run start-pre exectuable: %s", s->meta.id, strerror(-r));
882 socket_enter_dead(s, false);
885 static void socket_enter_running(Socket *s, int cfd) {
891 if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
894 socket_set_state(s, SOCKET_RUNNING);
897 char *prefix, *instance, *name;
899 if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)) < 0)
902 if (!(prefix = unit_name_to_prefix(UNIT(s)->meta.id))) {
908 name = unit_name_build(prefix, instance, ".service");
917 r = manager_load_unit(UNIT(s)->meta.manager, name, NULL, &u);
923 if ((r = service_set_socket_fd(SERVICE(u), cfd)) < 0)
928 if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, NULL)) < 0)
935 log_warning("%s failed to queue socket startup job: %s", s->meta.id, strerror(-r));
936 socket_enter_stop_pre(s, false);
939 close_nointr_nofail(cfd);
942 static void socket_run_next(Socket *s, bool success) {
946 assert(s->control_command);
947 assert(s->control_command->command_next);
952 socket_unwatch_control_pid(s);
954 s->control_command = s->control_command->command_next;
956 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
962 log_warning("%s failed to run spawn next executable: %s", s->meta.id, strerror(-r));
964 if (s->state == SOCKET_START_POST)
965 socket_enter_stop_pre(s, false);
966 else if (s->state == SOCKET_STOP_POST)
967 socket_enter_dead(s, false);
969 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
972 static int socket_start(Unit *u) {
973 Socket *s = SOCKET(u);
977 /* We cannot fulfill this request right now, try again later
979 if (s->state == SOCKET_STOP_PRE ||
980 s->state == SOCKET_STOP_PRE_SIGKILL ||
981 s->state == SOCKET_STOP_PRE_SIGTERM ||
982 s->state == SOCKET_STOP_POST ||
983 s->state == SOCKET_FINAL_SIGTERM ||
984 s->state == SOCKET_FINAL_SIGKILL)
987 if (s->state == SOCKET_START_PRE ||
988 s->state == SOCKET_START_POST)
991 /* Cannot run this without the service being around */
993 if (s->service->meta.load_state != UNIT_LOADED)
996 /* If the service is alredy actvie we cannot start the
998 if (s->service->state != SERVICE_DEAD &&
999 s->service->state != SERVICE_MAINTAINANCE &&
1000 s->service->state != SERVICE_AUTO_RESTART)
1004 assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTAINANCE);
1007 socket_enter_start_pre(s);
1011 static int socket_stop(Unit *u) {
1012 Socket *s = SOCKET(u);
1016 /* We cannot fulfill this request right now, try again later
1018 if (s->state == SOCKET_START_PRE ||
1019 s->state == SOCKET_START_POST)
1023 if (s->state == SOCKET_STOP_PRE ||
1024 s->state == SOCKET_STOP_PRE_SIGTERM ||
1025 s->state == SOCKET_STOP_PRE_SIGKILL ||
1026 s->state == SOCKET_STOP_POST ||
1027 s->state == SOCKET_FINAL_SIGTERM ||
1028 s->state == SOCKET_FINAL_SIGTERM)
1031 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1033 socket_enter_stop_pre(s, true);
1037 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1038 Socket *s = SOCKET(u);
1046 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1047 unit_serialize_item(u, f, "failure", yes_no(s->failure));
1048 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1050 if (s->control_pid > 0)
1051 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) s->control_pid);
1053 if (s->control_command_id >= 0)
1054 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1056 LIST_FOREACH(port, p, s->ports) {
1062 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1065 if (p->type == SOCKET_SOCKET) {
1068 if ((r = socket_address_print(&p->address, &t)) < 0)
1071 unit_serialize_item_format(u, f, "socket", "%i %s", copy, t);
1074 assert(p->type == SOCKET_FIFO);
1075 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1082 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1083 Socket *s = SOCKET(u);
1091 if (streq(key, "state")) {
1094 if ((state = socket_state_from_string(value)) < 0)
1095 log_debug("Failed to parse state value %s", value);
1097 s->deserialized_state = state;
1098 } else if (streq(key, "failure")) {
1101 if ((b = parse_boolean(value)) < 0)
1102 log_debug("Failed to parse failure value %s", value);
1104 s->failure = b || s->failure;
1106 } else if (streq(key, "n-accepted")) {
1109 if ((r = safe_atou(value, &k)) < 0)
1110 log_debug("Failed to parse n-accepted value %s", value);
1113 } else if (streq(key, "control-pid")) {
1116 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1117 log_debug("Failed to parse control-pid value %s", value);
1119 s->control_pid = (pid_t) pid;
1120 } else if (streq(key, "control-command")) {
1121 SocketExecCommand id;
1123 if ((id = socket_exec_command_from_string(value)) < 0)
1124 log_debug("Failed to parse exec-command value %s", value);
1126 s->control_command_id = id;
1127 s->control_command = s->exec_command[id];
1129 } else if (streq(key, "fifo")) {
1133 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1134 log_debug("Failed to parse fifo value %s", value);
1137 LIST_FOREACH(port, p, s->ports)
1138 if (streq(p->path, value+skip))
1143 close_nointr_nofail(p->fd);
1144 p->fd = fdset_remove(fds, fd);
1148 } else if (streq(key, "socket")) {
1152 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1153 log_debug("Failed to parse socket value %s", value);
1156 LIST_FOREACH(port, p, s->ports)
1157 if (socket_address_is(&p->address, value+skip))
1162 close_nointr_nofail(p->fd);
1163 p->fd = fdset_remove(fds, fd);
1168 log_debug("Unknown serialization key '%s'", key);
1173 static UnitActiveState socket_active_state(Unit *u) {
1176 return state_translation_table[SOCKET(u)->state];
1179 static const char *socket_sub_state_to_string(Unit *u) {
1182 return socket_state_to_string(SOCKET(u)->state);
1185 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1186 Socket *s = SOCKET(u);
1192 log_debug("Incoming traffic on %s", u->meta.id);
1194 if (events != EPOLLIN) {
1195 log_error("Got invalid poll event on socket.");
1199 if (w->socket_accept) {
1202 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1207 log_error("Failed to accept socket: %m");
1215 socket_enter_running(s, cfd);
1219 socket_enter_stop_pre(s, false);
1222 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1223 Socket *s = SOCKET(u);
1229 success = is_clean_exit(code, status);
1230 s->failure = s->failure || !success;
1232 assert(s->control_pid == pid);
1235 if (s->control_command)
1236 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1238 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1240 if (s->control_command && s->control_command->command_next && success) {
1241 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1242 socket_run_next(s, success);
1244 s->control_command = NULL;
1245 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1247 /* No further commands for this step, so let's figure
1248 * out what to do next */
1250 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1254 case SOCKET_START_PRE:
1256 socket_enter_start_post(s);
1258 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1261 case SOCKET_START_POST:
1263 socket_enter_listening(s);
1265 socket_enter_stop_pre(s, false);
1268 case SOCKET_STOP_PRE:
1269 case SOCKET_STOP_PRE_SIGTERM:
1270 case SOCKET_STOP_PRE_SIGKILL:
1271 socket_enter_stop_post(s, success);
1274 case SOCKET_STOP_POST:
1275 case SOCKET_FINAL_SIGTERM:
1276 case SOCKET_FINAL_SIGKILL:
1277 socket_enter_dead(s, success);
1281 assert_not_reached("Uh, control process died at wrong time.");
1286 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1287 Socket *s = SOCKET(u);
1290 assert(elapsed == 1);
1291 assert(w == &s->timer_watch);
1295 case SOCKET_START_PRE:
1296 log_warning("%s starting timed out. Terminating.", u->meta.id);
1297 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1299 case SOCKET_START_POST:
1300 log_warning("%s starting timed out. Stopping.", u->meta.id);
1301 socket_enter_stop_pre(s, false);
1304 case SOCKET_STOP_PRE:
1305 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1306 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1309 case SOCKET_STOP_PRE_SIGTERM:
1310 log_warning("%s stopping timed out. Killing.", u->meta.id);
1311 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1314 case SOCKET_STOP_PRE_SIGKILL:
1315 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1316 socket_enter_stop_post(s, false);
1319 case SOCKET_STOP_POST:
1320 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1321 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1324 case SOCKET_FINAL_SIGTERM:
1325 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1326 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1329 case SOCKET_FINAL_SIGKILL:
1330 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u->meta.id);
1331 socket_enter_dead(s, false);
1335 assert_not_reached("Timeout at wrong time.");
1339 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1348 /* Called from the service code for requesting our fds */
1351 LIST_FOREACH(port, p, s->ports)
1355 if (!(rfds = new(int, rn_fds)) < 0)
1359 LIST_FOREACH(port, p, s->ports)
1363 assert(k == rn_fds);
1371 void socket_notify_service_dead(Socket *s) {
1374 /* The service is dead. Dang. */
1376 if (s->state == SOCKET_RUNNING) {
1377 log_debug("%s got notified about service death.", s->meta.id);
1378 socket_enter_listening(s);
1382 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1383 [SOCKET_DEAD] = "dead",
1384 [SOCKET_START_PRE] = "start-pre",
1385 [SOCKET_START_POST] = "start-post",
1386 [SOCKET_LISTENING] = "listening",
1387 [SOCKET_RUNNING] = "running",
1388 [SOCKET_STOP_PRE] = "stop-pre",
1389 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1390 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1391 [SOCKET_STOP_POST] = "stop-post",
1392 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1393 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
1394 [SOCKET_MAINTAINANCE] = "maintainance"
1397 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1399 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1400 [SOCKET_EXEC_START_PRE] = "StartPre",
1401 [SOCKET_EXEC_START_POST] = "StartPost",
1402 [SOCKET_EXEC_STOP_PRE] = "StopPre",
1403 [SOCKET_EXEC_STOP_POST] = "StopPost"
1406 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1408 const UnitVTable socket_vtable = {
1409 .suffix = ".socket",
1411 .init = socket_init,
1412 .done = socket_done,
1413 .load = socket_load,
1415 .coldplug = socket_coldplug,
1417 .dump = socket_dump,
1419 .start = socket_start,
1420 .stop = socket_stop,
1422 .serialize = socket_serialize,
1423 .deserialize_item = socket_deserialize_item,
1425 .active_state = socket_active_state,
1426 .sub_state_to_string = socket_sub_state_to_string,
1428 .fd_event = socket_fd_event,
1429 .sigchld_event = socket_sigchld_event,
1430 .timer_event = socket_timer_event,
1432 .bus_message_handler = bus_socket_message_handler