1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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 "netinet/tcp.h"
36 #include "load-dropin.h"
37 #include "load-fragment.h"
39 #include "unit-name.h"
40 #include "dbus-socket.h"
43 #include "bus-errors.h"
45 #include "exit-status.h"
48 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
49 [SOCKET_DEAD] = UNIT_INACTIVE,
50 [SOCKET_START_PRE] = UNIT_ACTIVATING,
51 [SOCKET_START_POST] = UNIT_ACTIVATING,
52 [SOCKET_LISTENING] = UNIT_ACTIVE,
53 [SOCKET_RUNNING] = UNIT_ACTIVE,
54 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
55 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
56 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
57 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
58 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
59 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
60 [SOCKET_FAILED] = UNIT_FAILED
63 static void socket_init(Unit *u) {
64 Socket *s = SOCKET(u);
67 assert(u->load_state == UNIT_STUB);
69 s->backlog = SOMAXCONN;
70 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
71 s->directory_mode = 0755;
72 s->socket_mode = 0666;
74 s->max_connections = 64;
81 exec_context_init(&s->exec_context);
82 s->exec_context.std_output = u->manager->default_std_output;
83 s->exec_context.std_error = u->manager->default_std_error;
85 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
88 static void socket_unwatch_control_pid(Socket *s) {
91 if (s->control_pid <= 0)
94 unit_unwatch_pid(UNIT(s), s->control_pid);
98 static void socket_done(Unit *u) {
99 Socket *s = SOCKET(u);
104 while ((p = s->ports)) {
105 LIST_REMOVE(SocketPort, port, s->ports, p);
108 unit_unwatch_fd(UNIT(s), &p->fd_watch);
109 close_nointr_nofail(p->fd);
116 exec_context_done(&s->exec_context);
117 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
118 s->control_command = NULL;
120 socket_unwatch_control_pid(s);
122 unit_ref_unset(&s->service);
124 free(s->tcp_congestion);
125 s->tcp_congestion = NULL;
127 free(s->bind_to_device);
128 s->bind_to_device = NULL;
130 unit_unwatch_timer(u, &s->timer_watch);
133 static int socket_instantiate_service(Socket *s) {
140 /* This fills in s->service if it isn't filled in yet. For
141 * Accept=yes sockets we create the next connection service
142 * here. For Accept=no this is mostly a NOP since the service
143 * is figured out at load time anyway. */
145 if (UNIT_DEREF(s->service))
150 if (!(prefix = unit_name_to_prefix(UNIT(s)->id)))
153 r = asprintf(&name, "%s@%u.service", prefix, s->n_accepted);
159 r = manager_load_unit(UNIT(s)->manager, name, NULL, NULL, &u);
165 #ifdef HAVE_SYSV_COMPAT
166 if (SERVICE(u)->sysv_path) {
167 log_error("Using SysV services for socket activation is not supported. Refusing.");
173 unit_ref_set(&s->service, u);
175 return unit_add_two_dependencies(UNIT(s), UNIT_BEFORE, UNIT_TRIGGERS, u, false);
178 static bool have_non_accept_socket(Socket *s) {
186 LIST_FOREACH(port, p, s->ports) {
188 if (p->type != SOCKET_SOCKET)
191 if (!socket_address_can_accept(&p->address))
198 static int socket_verify(Socket *s) {
201 if (UNIT(s)->load_state != UNIT_LOADED)
205 log_error("%s lacks Listen setting. Refusing.", UNIT(s)->id);
209 if (s->accept && have_non_accept_socket(s)) {
210 log_error("%s configured for accepting sockets, but sockets are non-accepting. Refusing.", UNIT(s)->id);
214 if (s->accept && s->max_connections <= 0) {
215 log_error("%s's MaxConnection setting too small. Refusing.", UNIT(s)->id);
219 if (s->accept && UNIT_DEREF(s->service)) {
220 log_error("Explicit service configuration for accepting sockets not supported on %s. Refusing.", UNIT(s)->id);
224 if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
225 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id);
232 static bool socket_needs_mount(Socket *s, const char *prefix) {
237 LIST_FOREACH(port, p, s->ports) {
239 if (p->type == SOCKET_SOCKET) {
240 if (socket_address_needs_mount(&p->address, prefix))
242 } else if (p->type == SOCKET_FIFO || p->type == SOCKET_SPECIAL) {
243 if (path_startswith(p->path, prefix))
251 int socket_add_one_mount_link(Socket *s, Mount *m) {
257 if (UNIT(s)->load_state != UNIT_LOADED ||
258 UNIT(m)->load_state != UNIT_LOADED)
261 if (!socket_needs_mount(s, m->where))
264 if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0)
270 static int socket_add_mount_links(Socket *s) {
276 LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_MOUNT])
277 if ((r = socket_add_one_mount_link(s, MOUNT(other))) < 0)
283 static int socket_add_device_link(Socket *s) {
289 if (!s->bind_to_device)
292 if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
295 r = unit_add_node_link(UNIT(s), t, false);
301 static int socket_add_default_dependencies(Socket *s) {
305 if (UNIT(s)->manager->running_as == MANAGER_SYSTEM) {
306 if ((r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
309 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
313 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
316 static bool socket_has_exec(Socket *s) {
320 for (i = 0; i < _SOCKET_EXEC_COMMAND_MAX; i++)
321 if (s->exec_command[i])
327 static int socket_load(Unit *u) {
328 Socket *s = SOCKET(u);
332 assert(u->load_state == UNIT_STUB);
334 if ((r = unit_load_fragment_and_dropin(u)) < 0)
337 /* This is a new unit? Then let's add in some extras */
338 if (u->load_state == UNIT_LOADED) {
340 if (have_non_accept_socket(s)) {
342 if (!UNIT_DEREF(s->service)) {
345 r = unit_load_related_unit(u, ".service", &x);
349 unit_ref_set(&s->service, x);
352 r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true);
357 if ((r = socket_add_mount_links(s)) < 0)
360 if ((r = socket_add_device_link(s)) < 0)
363 if (socket_has_exec(s))
364 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
367 if ((r = unit_add_default_cgroups(u)) < 0)
370 if (UNIT(s)->default_dependencies)
371 if ((r = socket_add_default_dependencies(s)) < 0)
375 return socket_verify(s);
378 static const char* listen_lookup(int family, int type) {
380 if (family == AF_NETLINK)
381 return "ListenNetlink";
383 if (type == SOCK_STREAM)
384 return "ListenStream";
385 else if (type == SOCK_DGRAM)
386 return "ListenDatagram";
387 else if (type == SOCK_SEQPACKET)
388 return "ListenSequentialPacket";
390 assert_not_reached("Unknown socket type");
394 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
397 Socket *s = SOCKET(u);
405 p2 = strappend(prefix, "\t");
406 prefix2 = p2 ? p2 : prefix;
409 "%sSocket State: %s\n"
410 "%sBindIPv6Only: %s\n"
412 "%sSocketMode: %04o\n"
413 "%sDirectoryMode: %04o\n"
416 "%sTransparent: %s\n"
418 "%sPassCredentials: %s\n"
419 "%sTCPCongestion: %s\n",
420 prefix, socket_state_to_string(s->state),
421 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
423 prefix, s->socket_mode,
424 prefix, s->directory_mode,
425 prefix, yes_no(s->keep_alive),
426 prefix, yes_no(s->free_bind),
427 prefix, yes_no(s->transparent),
428 prefix, yes_no(s->broadcast),
429 prefix, yes_no(s->pass_cred),
430 prefix, strna(s->tcp_congestion));
432 if (s->control_pid > 0)
434 "%sControl PID: %lu\n",
435 prefix, (unsigned long) s->control_pid);
437 if (s->bind_to_device)
439 "%sBindToDevice: %s\n",
440 prefix, s->bind_to_device);
445 "%sNConnections: %u\n"
446 "%sMaxConnections: %u\n",
447 prefix, s->n_accepted,
448 prefix, s->n_connections,
449 prefix, s->max_connections);
451 if (s->priority >= 0)
454 prefix, s->priority);
456 if (s->receive_buffer > 0)
458 "%sReceiveBuffer: %zu\n",
459 prefix, s->receive_buffer);
461 if (s->send_buffer > 0)
463 "%sSendBuffer: %zu\n",
464 prefix, s->send_buffer);
476 if (s->pipe_size > 0)
479 prefix, s->pipe_size);
486 if (s->mq_maxmsg > 0)
488 "%sMessageQueueMaxMessages: %li\n",
489 prefix, s->mq_maxmsg);
491 if (s->mq_msgsize > 0)
493 "%sMessageQueueMessageSize: %li\n",
494 prefix, s->mq_msgsize);
496 LIST_FOREACH(port, p, s->ports) {
498 if (p->type == SOCKET_SOCKET) {
503 if ((r = socket_address_print(&p->address, &k)) < 0)
508 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t);
510 } else if (p->type == SOCKET_SPECIAL)
511 fprintf(f, "%sListenSpecial: %s\n", prefix, p->path);
512 else if (p->type == SOCKET_MQUEUE)
513 fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path);
515 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
518 exec_context_dump(&s->exec_context, f, prefix);
520 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
521 if (!s->exec_command[c])
524 fprintf(f, "%s-> %s:\n",
525 prefix, socket_exec_command_to_string(c));
527 exec_command_dump_list(s->exec_command[c], f, prefix2);
533 static int instance_from_socket(int fd, unsigned nr, char **instance) {
538 struct sockaddr_un un;
539 struct sockaddr_in in;
540 struct sockaddr_in6 in6;
541 struct sockaddr_storage storage;
548 if (getsockname(fd, &local.sa, &l) < 0)
552 if (getpeername(fd, &remote.sa, &l) < 0)
555 switch (local.sa.sa_family) {
559 a = ntohl(local.in.sin_addr.s_addr),
560 b = ntohl(remote.in.sin_addr.s_addr);
563 "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
564 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
565 ntohs(local.in.sin_port),
566 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
567 ntohs(remote.in.sin_port)) < 0)
574 static const char ipv4_prefix[] = {
575 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
578 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
579 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
581 *a = local.in6.sin6_addr.s6_addr+12,
582 *b = remote.in6.sin6_addr.s6_addr+12;
585 "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
586 a[0], a[1], a[2], a[3],
587 ntohs(local.in6.sin6_port),
588 b[0], b[1], b[2], b[3],
589 ntohs(remote.in6.sin6_port)) < 0)
592 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
596 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
597 ntohs(local.in6.sin6_port),
598 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
599 ntohs(remote.in6.sin6_port)) < 0)
610 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
616 (unsigned long) ucred.pid,
617 (unsigned long) ucred.uid) < 0)
624 assert_not_reached("Unhandled socket type.");
631 static void socket_close_fds(Socket *s) {
636 LIST_FOREACH(port, p, s->ports) {
640 unit_unwatch_fd(UNIT(s), &p->fd_watch);
641 close_nointr_nofail(p->fd);
643 /* One little note: we should never delete any sockets
644 * in the file system here! After all some other
645 * process we spawned might still have a reference of
646 * this fd and wants to continue to use it. Therefore
647 * we delete sockets in the file system before we
648 * create a new one, not after we stopped using
655 static void socket_apply_socket_options(Socket *s, int fd) {
660 int b = s->keep_alive;
661 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
662 log_warning("SO_KEEPALIVE failed: %m");
667 if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0)
668 log_warning("SO_BROADCAST failed: %m");
673 if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0)
674 log_warning("SO_PASSCRED failed: %m");
677 if (s->priority >= 0)
678 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
679 log_warning("SO_PRIORITY failed: %m");
681 if (s->receive_buffer > 0) {
682 int value = (int) s->receive_buffer;
684 /* We first try with SO_RCVBUFFORCE, in case we have the perms for that */
686 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0)
687 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
688 log_warning("SO_RCVBUF failed: %m");
691 if (s->send_buffer > 0) {
692 int value = (int) s->send_buffer;
693 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0)
694 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
695 log_warning("SO_SNDBUF failed: %m");
699 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
700 log_warning("SO_MARK failed: %m");
703 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
704 log_warning("IP_TOS failed: %m");
706 if (s->ip_ttl >= 0) {
709 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
711 if (socket_ipv6_is_supported())
712 x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
715 errno = EAFNOSUPPORT;
719 log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
722 if (s->tcp_congestion)
723 if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0)
724 log_warning("TCP_CONGESTION failed: %m");
727 static void socket_apply_fifo_options(Socket *s, int fd) {
731 if (s->pipe_size > 0)
732 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
733 log_warning("F_SETPIPE_SZ: %m");
736 static int fifo_address_create(
738 mode_t directory_mode,
749 mkdir_parents(path, directory_mode);
751 if ((r = label_fifofile_set(path)) < 0)
754 /* Enforce the right access mode for the fifo */
755 old_mask = umask(~ socket_mode);
757 /* Include the original umask in our mask */
758 umask(~socket_mode | old_mask);
760 r = mkfifo(path, socket_mode);
763 if (r < 0 && errno != EEXIST) {
768 if ((fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
775 if (fstat(fd, &st) < 0) {
780 if (!S_ISFIFO(st.st_mode) ||
781 (st.st_mode & 0777) != (socket_mode & ~old_mask) ||
782 st.st_uid != getuid() ||
783 st.st_gid != getgid()) {
796 close_nointr_nofail(fd);
801 static int special_address_create(
811 if ((fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
816 if (fstat(fd, &st) < 0) {
821 /* Check whether this is a /proc, /sys or /dev file or char device */
822 if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) {
832 close_nointr_nofail(fd);
837 static int mq_address_create(
847 struct mq_attr _attr, *attr = NULL;
852 if (maxmsg > 0 && msgsize > 0) {
854 _attr.mq_flags = O_NONBLOCK;
855 _attr.mq_maxmsg = maxmsg;
856 _attr.mq_msgsize = msgsize;
860 /* Enforce the right access mode for the mq */
861 old_mask = umask(~ mq_mode);
863 /* Include the original umask in our mask */
864 umask(~mq_mode | old_mask);
866 fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr);
874 if (fstat(fd, &st) < 0) {
879 if ((st.st_mode & 0777) != (mq_mode & ~old_mask) ||
880 st.st_uid != getuid() ||
881 st.st_gid != getgid()) {
892 close_nointr_nofail(fd);
897 static int socket_open_fds(Socket *s) {
901 bool know_label = false;
905 LIST_FOREACH(port, p, s->ports) {
910 if (p->type == SOCKET_SOCKET) {
914 if ((r = socket_instantiate_service(s)) < 0)
917 if (UNIT_DEREF(s->service) &&
918 SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]) {
919 r = label_get_create_label_from_exe(SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]->path, &label);
930 if ((r = socket_address_listen(
943 socket_apply_socket_options(s, p->fd);
945 } else if (p->type == SOCKET_SPECIAL) {
947 if ((r = special_address_create(
952 } else if (p->type == SOCKET_FIFO) {
954 if ((r = fifo_address_create(
961 socket_apply_fifo_options(s, p->fd);
962 } else if (p->type == SOCKET_MQUEUE) {
964 if ((r = mq_address_create(
972 assert_not_reached("Unknown port type");
984 static void socket_unwatch_fds(Socket *s) {
989 LIST_FOREACH(port, p, s->ports) {
993 unit_unwatch_fd(UNIT(s), &p->fd_watch);
997 static int socket_watch_fds(Socket *s) {
1003 LIST_FOREACH(port, p, s->ports) {
1007 p->fd_watch.socket_accept =
1009 p->type == SOCKET_SOCKET &&
1010 socket_address_can_accept(&p->address);
1012 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
1019 socket_unwatch_fds(s);
1023 static void socket_set_state(Socket *s, SocketState state) {
1024 SocketState old_state;
1027 old_state = s->state;
1030 if (state != SOCKET_START_PRE &&
1031 state != SOCKET_START_POST &&
1032 state != SOCKET_STOP_PRE &&
1033 state != SOCKET_STOP_PRE_SIGTERM &&
1034 state != SOCKET_STOP_PRE_SIGKILL &&
1035 state != SOCKET_STOP_POST &&
1036 state != SOCKET_FINAL_SIGTERM &&
1037 state != SOCKET_FINAL_SIGKILL) {
1038 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1039 socket_unwatch_control_pid(s);
1040 s->control_command = NULL;
1041 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1044 if (state != SOCKET_LISTENING)
1045 socket_unwatch_fds(s);
1047 if (state != SOCKET_START_POST &&
1048 state != SOCKET_LISTENING &&
1049 state != SOCKET_RUNNING &&
1050 state != SOCKET_STOP_PRE &&
1051 state != SOCKET_STOP_PRE_SIGTERM &&
1052 state != SOCKET_STOP_PRE_SIGKILL)
1053 socket_close_fds(s);
1055 if (state != old_state)
1056 log_debug("%s changed %s -> %s",
1058 socket_state_to_string(old_state),
1059 socket_state_to_string(state));
1061 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
1064 static int socket_coldplug(Unit *u) {
1065 Socket *s = SOCKET(u);
1069 assert(s->state == SOCKET_DEAD);
1071 if (s->deserialized_state != s->state) {
1073 if (s->deserialized_state == SOCKET_START_PRE ||
1074 s->deserialized_state == SOCKET_START_POST ||
1075 s->deserialized_state == SOCKET_STOP_PRE ||
1076 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1077 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
1078 s->deserialized_state == SOCKET_STOP_POST ||
1079 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
1080 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
1082 if (s->control_pid <= 0)
1085 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1088 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1092 if (s->deserialized_state == SOCKET_START_POST ||
1093 s->deserialized_state == SOCKET_LISTENING ||
1094 s->deserialized_state == SOCKET_RUNNING ||
1095 s->deserialized_state == SOCKET_STOP_PRE ||
1096 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1097 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
1098 if ((r = socket_open_fds(s)) < 0)
1101 if (s->deserialized_state == SOCKET_LISTENING)
1102 if ((r = socket_watch_fds(s)) < 0)
1105 socket_set_state(s, s->deserialized_state);
1111 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
1120 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1123 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1132 UNIT(s)->manager->environment,
1136 UNIT(s)->manager->confirm_spawn,
1137 UNIT(s)->cgroup_bondings,
1138 UNIT(s)->cgroup_attributes,
1145 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1146 /* FIXME: we need to do something here */
1154 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1159 static void socket_enter_dead(Socket *s, SocketResult f) {
1162 if (f != SOCKET_SUCCESS)
1165 socket_set_state(s, s->result != SOCKET_SUCCESS ? SOCKET_FAILED : SOCKET_DEAD);
1168 static void socket_enter_signal(Socket *s, SocketState state, SocketResult f);
1170 static void socket_enter_stop_post(Socket *s, SocketResult f) {
1174 if (f != SOCKET_SUCCESS)
1177 socket_unwatch_control_pid(s);
1179 s->control_command_id = SOCKET_EXEC_STOP_POST;
1181 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
1182 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1185 socket_set_state(s, SOCKET_STOP_POST);
1187 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_SUCCESS);
1192 log_warning("%s failed to run 'stop-post' task: %s", UNIT(s)->id, strerror(-r));
1193 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES);
1196 static void socket_enter_signal(Socket *s, SocketState state, SocketResult f) {
1198 Set *pid_set = NULL;
1199 bool wait_for_exit = false;
1203 if (f != SOCKET_SUCCESS)
1206 if (s->exec_context.kill_mode != KILL_NONE) {
1207 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1209 if (s->control_pid > 0) {
1210 if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
1212 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1214 wait_for_exit = true;
1217 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1219 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1224 /* Exclude the control pid from being killed via the cgroup */
1225 if (s->control_pid > 0)
1226 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1229 if ((r = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, sig, true, pid_set)) < 0) {
1230 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1231 log_warning("Failed to kill control group: %s", strerror(-r));
1233 wait_for_exit = true;
1240 if (wait_for_exit) {
1241 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1244 socket_set_state(s, state);
1245 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1246 socket_enter_stop_post(s, SOCKET_SUCCESS);
1248 socket_enter_dead(s, SOCKET_SUCCESS);
1253 log_warning("%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
1255 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1256 socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES);
1258 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
1264 static void socket_enter_stop_pre(Socket *s, SocketResult f) {
1268 if (f != SOCKET_SUCCESS)
1271 socket_unwatch_control_pid(s);
1273 s->control_command_id = SOCKET_EXEC_STOP_PRE;
1275 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
1276 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1279 socket_set_state(s, SOCKET_STOP_PRE);
1281 socket_enter_stop_post(s, SOCKET_SUCCESS);
1286 log_warning("%s failed to run 'stop-pre' task: %s", UNIT(s)->id, strerror(-r));
1287 socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES);
1290 static void socket_enter_listening(Socket *s) {
1294 r = socket_watch_fds(s);
1296 log_warning("%s failed to watch sockets: %s", UNIT(s)->id, strerror(-r));
1300 socket_set_state(s, SOCKET_LISTENING);
1304 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1307 static void socket_enter_start_post(Socket *s) {
1311 r = socket_open_fds(s);
1313 log_warning("%s failed to listen on sockets: %s", UNIT(s)->id, strerror(-r));
1317 socket_unwatch_control_pid(s);
1319 s->control_command_id = SOCKET_EXEC_START_POST;
1321 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
1322 r = socket_spawn(s, s->control_command, &s->control_pid);
1324 log_warning("%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
1328 socket_set_state(s, SOCKET_START_POST);
1330 socket_enter_listening(s);
1335 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1338 static void socket_enter_start_pre(Socket *s) {
1342 socket_unwatch_control_pid(s);
1344 s->control_command_id = SOCKET_EXEC_START_PRE;
1346 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
1347 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1350 socket_set_state(s, SOCKET_START_PRE);
1352 socket_enter_start_post(s);
1357 log_warning("%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
1358 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
1361 static void socket_enter_running(Socket *s, int cfd) {
1366 dbus_error_init(&error);
1368 /* We don't take connections anymore if we are supposed to
1369 * shut down anyway */
1370 if (unit_pending_inactive(UNIT(s))) {
1371 log_debug("Suppressing connection request on %s since unit stop is scheduled.", UNIT(s)->id);
1374 close_nointr_nofail(cfd);
1376 /* Flush all sockets by closing and reopening them */
1377 socket_close_fds(s);
1379 r = socket_watch_fds(s);
1381 log_warning("%s failed to watch sockets: %s", UNIT(s)->id, strerror(-r));
1382 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1392 bool pending = false;
1394 /* If there's already a start pending don't bother to
1396 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERS], i)
1397 if (unit_pending_active(u)) {
1403 r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT_DEREF(s->service), JOB_REPLACE, true, &error, NULL);
1408 socket_set_state(s, SOCKET_RUNNING);
1410 char *prefix, *instance = NULL, *name;
1413 if (s->n_connections >= s->max_connections) {
1414 log_warning("Too many incoming connections (%u)", s->n_connections);
1415 close_nointr_nofail(cfd);
1419 r = socket_instantiate_service(s);
1423 r = instance_from_socket(cfd, s->n_accepted, &instance);
1428 /* ENOTCONN is legitimate if TCP RST was received.
1429 * This connection is over, but the socket unit lives on. */
1430 close_nointr_nofail(cfd);
1434 prefix = unit_name_to_prefix(UNIT(s)->id);
1441 name = unit_name_build(prefix, instance, ".service");
1450 r = unit_add_name(UNIT_DEREF(s->service), name);
1456 service = SERVICE(UNIT_DEREF(s->service));
1457 unit_ref_unset(&s->service);
1460 UNIT(service)->no_gc = false;
1462 unit_choose_id(UNIT(service), name);
1465 r = service_set_socket_fd(service, cfd, s);
1470 s->n_connections ++;
1472 r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT(service), JOB_REPLACE, true, &error, NULL);
1476 /* Notify clients about changed counters */
1477 unit_add_to_dbus_queue(UNIT(s));
1483 log_warning("%s failed to queue socket startup job: %s", UNIT(s)->id, bus_error(&error, r));
1484 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1487 close_nointr_nofail(cfd);
1489 dbus_error_free(&error);
1492 static void socket_run_next(Socket *s) {
1496 assert(s->control_command);
1497 assert(s->control_command->command_next);
1499 socket_unwatch_control_pid(s);
1501 s->control_command = s->control_command->command_next;
1503 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1509 log_warning("%s failed to run next task: %s", UNIT(s)->id, strerror(-r));
1511 if (s->state == SOCKET_START_POST)
1512 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1513 else if (s->state == SOCKET_STOP_POST)
1514 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
1516 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES);
1519 static int socket_start(Unit *u) {
1520 Socket *s = SOCKET(u);
1524 /* We cannot fulfill this request right now, try again later
1526 if (s->state == SOCKET_STOP_PRE ||
1527 s->state == SOCKET_STOP_PRE_SIGKILL ||
1528 s->state == SOCKET_STOP_PRE_SIGTERM ||
1529 s->state == SOCKET_STOP_POST ||
1530 s->state == SOCKET_FINAL_SIGTERM ||
1531 s->state == SOCKET_FINAL_SIGKILL)
1534 if (s->state == SOCKET_START_PRE ||
1535 s->state == SOCKET_START_POST)
1538 /* Cannot run this without the service being around */
1539 if (UNIT_DEREF(s->service)) {
1542 service = SERVICE(UNIT_DEREF(s->service));
1544 if (UNIT(service)->load_state != UNIT_LOADED) {
1545 log_error("Socket service %s not loaded, refusing.", UNIT(service)->id);
1549 /* If the service is already active we cannot start the
1551 if (service->state != SERVICE_DEAD &&
1552 service->state != SERVICE_FAILED &&
1553 service->state != SERVICE_AUTO_RESTART) {
1554 log_error("Socket service %s already active, refusing.", UNIT(service)->id);
1558 #ifdef HAVE_SYSV_COMPAT
1559 if (service->sysv_path) {
1560 log_error("Using SysV services for socket activation is not supported. Refusing.");
1566 assert(s->state == SOCKET_DEAD || s->state == SOCKET_FAILED);
1568 s->result = SOCKET_SUCCESS;
1569 socket_enter_start_pre(s);
1573 static int socket_stop(Unit *u) {
1574 Socket *s = SOCKET(u);
1579 if (s->state == SOCKET_STOP_PRE ||
1580 s->state == SOCKET_STOP_PRE_SIGTERM ||
1581 s->state == SOCKET_STOP_PRE_SIGKILL ||
1582 s->state == SOCKET_STOP_POST ||
1583 s->state == SOCKET_FINAL_SIGTERM ||
1584 s->state == SOCKET_FINAL_SIGKILL)
1587 /* If there's already something running we go directly into
1589 if (s->state == SOCKET_START_PRE ||
1590 s->state == SOCKET_START_POST) {
1591 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_SUCCESS);
1595 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1597 socket_enter_stop_pre(s, SOCKET_SUCCESS);
1601 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1602 Socket *s = SOCKET(u);
1610 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1611 unit_serialize_item(u, f, "result", socket_result_to_string(s->result));
1612 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1614 if (s->control_pid > 0)
1615 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1617 if (s->control_command_id >= 0)
1618 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1620 LIST_FOREACH(port, p, s->ports) {
1626 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1629 if (p->type == SOCKET_SOCKET) {
1632 if ((r = socket_address_print(&p->address, &t)) < 0)
1635 if (socket_address_family(&p->address) == AF_NETLINK)
1636 unit_serialize_item_format(u, f, "netlink", "%i %s", copy, t);
1638 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1640 } else if (p->type == SOCKET_SPECIAL)
1641 unit_serialize_item_format(u, f, "special", "%i %s", copy, p->path);
1643 assert(p->type == SOCKET_FIFO);
1644 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1651 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1652 Socket *s = SOCKET(u);
1659 if (streq(key, "state")) {
1662 if ((state = socket_state_from_string(value)) < 0)
1663 log_debug("Failed to parse state value %s", value);
1665 s->deserialized_state = state;
1666 } else if (streq(key, "result")) {
1669 f = socket_result_from_string(value);
1671 log_debug("Failed to parse result value %s", value);
1672 else if (f != SOCKET_SUCCESS)
1675 } else if (streq(key, "n-accepted")) {
1678 if (safe_atou(value, &k) < 0)
1679 log_debug("Failed to parse n-accepted value %s", value);
1682 } else if (streq(key, "control-pid")) {
1685 if (parse_pid(value, &pid) < 0)
1686 log_debug("Failed to parse control-pid value %s", value);
1688 s->control_pid = pid;
1689 } else if (streq(key, "control-command")) {
1690 SocketExecCommand id;
1692 if ((id = socket_exec_command_from_string(value)) < 0)
1693 log_debug("Failed to parse exec-command value %s", value);
1695 s->control_command_id = id;
1696 s->control_command = s->exec_command[id];
1698 } else if (streq(key, "fifo")) {
1702 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1703 log_debug("Failed to parse fifo value %s", value);
1706 LIST_FOREACH(port, p, s->ports)
1707 if (p->type == SOCKET_FIFO &&
1708 streq_ptr(p->path, value+skip))
1713 close_nointr_nofail(p->fd);
1714 p->fd = fdset_remove(fds, fd);
1718 } else if (streq(key, "special")) {
1722 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1723 log_debug("Failed to parse special value %s", value);
1726 LIST_FOREACH(port, p, s->ports)
1727 if (p->type == SOCKET_SPECIAL &&
1728 streq_ptr(p->path, value+skip))
1733 close_nointr_nofail(p->fd);
1734 p->fd = fdset_remove(fds, fd);
1738 } else if (streq(key, "socket")) {
1739 int fd, type, skip = 0;
1742 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1743 log_debug("Failed to parse socket value %s", value);
1746 LIST_FOREACH(port, p, s->ports)
1747 if (socket_address_is(&p->address, value+skip, type))
1752 close_nointr_nofail(p->fd);
1753 p->fd = fdset_remove(fds, fd);
1757 } else if (streq(key, "netlink")) {
1761 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1762 log_debug("Failed to parse socket value %s", value);
1765 LIST_FOREACH(port, p, s->ports)
1766 if (socket_address_is_netlink(&p->address, value+skip))
1771 close_nointr_nofail(p->fd);
1772 p->fd = fdset_remove(fds, fd);
1777 log_debug("Unknown serialization key '%s'", key);
1782 static UnitActiveState socket_active_state(Unit *u) {
1785 return state_translation_table[SOCKET(u)->state];
1788 static const char *socket_sub_state_to_string(Unit *u) {
1791 return socket_state_to_string(SOCKET(u)->state);
1794 static bool socket_check_gc(Unit *u) {
1795 Socket *s = SOCKET(u);
1799 return s->n_connections > 0;
1802 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1803 Socket *s = SOCKET(u);
1809 if (s->state != SOCKET_LISTENING)
1812 log_debug("Incoming traffic on %s", u->id);
1814 if (events != EPOLLIN) {
1816 if (events & EPOLLHUP)
1817 log_error("%s: Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that.", u->id);
1819 log_error("%s: Got unexpected poll event (0x%x) on socket.", u->id, events);
1824 if (w->socket_accept) {
1827 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1832 log_error("Failed to accept socket: %m");
1839 socket_apply_socket_options(s, cfd);
1842 socket_enter_running(s, cfd);
1846 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1849 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1850 Socket *s = SOCKET(u);
1856 if (pid != s->control_pid)
1861 if (is_clean_exit(code, status))
1863 else if (code == CLD_EXITED)
1864 f = SOCKET_FAILURE_EXIT_CODE;
1865 else if (code == CLD_KILLED)
1866 f = SOCKET_FAILURE_SIGNAL;
1867 else if (code == CLD_DUMPED)
1868 f = SOCKET_FAILURE_CORE_DUMP;
1870 assert_not_reached("Unknown code");
1872 if (s->control_command) {
1873 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
1875 if (s->control_command->ignore)
1879 log_full(f == SOCKET_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
1880 "%s control process exited, code=%s status=%i", u->id, sigchld_code_to_string(code), status);
1882 if (f != SOCKET_SUCCESS)
1885 if (s->control_command &&
1886 s->control_command->command_next &&
1887 f == SOCKET_SUCCESS) {
1889 log_debug("%s running next command for state %s", u->id, socket_state_to_string(s->state));
1892 s->control_command = NULL;
1893 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1895 /* No further commands for this step, so let's figure
1896 * out what to do next */
1898 log_debug("%s got final SIGCHLD for state %s", u->id, socket_state_to_string(s->state));
1902 case SOCKET_START_PRE:
1903 if (f == SOCKET_SUCCESS)
1904 socket_enter_start_post(s);
1906 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, f);
1909 case SOCKET_START_POST:
1910 if (f == SOCKET_SUCCESS)
1911 socket_enter_listening(s);
1913 socket_enter_stop_pre(s, f);
1916 case SOCKET_STOP_PRE:
1917 case SOCKET_STOP_PRE_SIGTERM:
1918 case SOCKET_STOP_PRE_SIGKILL:
1919 socket_enter_stop_post(s, f);
1922 case SOCKET_STOP_POST:
1923 case SOCKET_FINAL_SIGTERM:
1924 case SOCKET_FINAL_SIGKILL:
1925 socket_enter_dead(s, f);
1929 assert_not_reached("Uh, control process died at wrong time.");
1933 /* Notify clients about changed exit status */
1934 unit_add_to_dbus_queue(u);
1937 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1938 Socket *s = SOCKET(u);
1941 assert(elapsed == 1);
1942 assert(w == &s->timer_watch);
1946 case SOCKET_START_PRE:
1947 log_warning("%s starting timed out. Terminating.", u->id);
1948 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT);
1951 case SOCKET_START_POST:
1952 log_warning("%s starting timed out. Stopping.", u->id);
1953 socket_enter_stop_pre(s, SOCKET_FAILURE_TIMEOUT);
1956 case SOCKET_STOP_PRE:
1957 log_warning("%s stopping timed out. Terminating.", u->id);
1958 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_FAILURE_TIMEOUT);
1961 case SOCKET_STOP_PRE_SIGTERM:
1962 if (s->exec_context.send_sigkill) {
1963 log_warning("%s stopping timed out. Killing.", u->id);
1964 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_FAILURE_TIMEOUT);
1966 log_warning("%s stopping timed out. Skipping SIGKILL. Ignoring.", u->id);
1967 socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT);
1971 case SOCKET_STOP_PRE_SIGKILL:
1972 log_warning("%s still around after SIGKILL. Ignoring.", u->id);
1973 socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT);
1976 case SOCKET_STOP_POST:
1977 log_warning("%s stopping timed out (2). Terminating.", u->id);
1978 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT);
1981 case SOCKET_FINAL_SIGTERM:
1982 if (s->exec_context.send_sigkill) {
1983 log_warning("%s stopping timed out (2). Killing.", u->id);
1984 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_FAILURE_TIMEOUT);
1986 log_warning("%s stopping timed out (2). Skipping SIGKILL. Ignoring.", u->id);
1987 socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT);
1991 case SOCKET_FINAL_SIGKILL:
1992 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->id);
1993 socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT);
1997 assert_not_reached("Timeout at wrong time.");
2001 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
2010 /* Called from the service code for requesting our fds */
2013 LIST_FOREACH(port, p, s->ports)
2023 if (!(rfds = new(int, rn_fds)))
2027 LIST_FOREACH(port, p, s->ports)
2031 assert(k == rn_fds);
2039 void socket_notify_service_dead(Socket *s) {
2042 /* The service is dead. Dang!
2044 * This is strictly for one-instance-for-all-connections
2047 if (s->state == SOCKET_RUNNING) {
2048 log_debug("%s got notified about service death.", UNIT(s)->id);
2049 socket_enter_listening(s);
2053 void socket_connection_unref(Socket *s) {
2056 /* The service is dead. Yay!
2058 * This is strictly for one-instance-per-connection
2061 assert(s->n_connections > 0);
2064 log_debug("%s: One connection closed, %u left.", UNIT(s)->id, s->n_connections);
2067 static void socket_reset_failed(Unit *u) {
2068 Socket *s = SOCKET(u);
2072 if (s->state == SOCKET_FAILED)
2073 socket_set_state(s, SOCKET_DEAD);
2075 s->result = SOCKET_SUCCESS;
2078 static int socket_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
2079 Socket *s = SOCKET(u);
2081 Set *pid_set = NULL;
2085 if (who == KILL_MAIN) {
2086 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Socket units have no main processes");
2090 if (s->control_pid <= 0 && who == KILL_CONTROL) {
2091 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
2095 if (who == KILL_CONTROL || who == KILL_ALL)
2096 if (s->control_pid > 0)
2097 if (kill(s->control_pid, signo) < 0)
2100 if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
2103 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
2106 /* Exclude the control pid from being killed via the cgroup */
2107 if (s->control_pid > 0)
2108 if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
2113 if ((q = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, signo, false, pid_set)) < 0)
2114 if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
2125 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
2126 [SOCKET_DEAD] = "dead",
2127 [SOCKET_START_PRE] = "start-pre",
2128 [SOCKET_START_POST] = "start-post",
2129 [SOCKET_LISTENING] = "listening",
2130 [SOCKET_RUNNING] = "running",
2131 [SOCKET_STOP_PRE] = "stop-pre",
2132 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
2133 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
2134 [SOCKET_STOP_POST] = "stop-post",
2135 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
2136 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
2137 [SOCKET_FAILED] = "failed"
2140 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
2142 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
2143 [SOCKET_EXEC_START_PRE] = "StartPre",
2144 [SOCKET_EXEC_START_POST] = "StartPost",
2145 [SOCKET_EXEC_STOP_PRE] = "StopPre",
2146 [SOCKET_EXEC_STOP_POST] = "StopPost"
2149 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
2151 static const char* const socket_result_table[_SOCKET_RESULT_MAX] = {
2152 [SOCKET_SUCCESS] = "success",
2153 [SOCKET_FAILURE_RESOURCES] = "resources",
2154 [SOCKET_FAILURE_TIMEOUT] = "timeout",
2155 [SOCKET_FAILURE_EXIT_CODE] = "exit-code",
2156 [SOCKET_FAILURE_SIGNAL] = "signal",
2157 [SOCKET_FAILURE_CORE_DUMP] = "core-dump"
2160 DEFINE_STRING_TABLE_LOOKUP(socket_result, SocketResult);
2162 const UnitVTable socket_vtable = {
2163 .suffix = ".socket",
2164 .object_size = sizeof(Socket),
2170 .init = socket_init,
2171 .done = socket_done,
2172 .load = socket_load,
2174 .kill = socket_kill,
2176 .coldplug = socket_coldplug,
2178 .dump = socket_dump,
2180 .start = socket_start,
2181 .stop = socket_stop,
2183 .serialize = socket_serialize,
2184 .deserialize_item = socket_deserialize_item,
2186 .active_state = socket_active_state,
2187 .sub_state_to_string = socket_sub_state_to_string,
2189 .check_gc = socket_check_gc,
2191 .fd_event = socket_fd_event,
2192 .sigchld_event = socket_sigchld_event,
2193 .timer_event = socket_timer_event,
2195 .reset_failed = socket_reset_failed,
2197 .bus_interface = "org.freedesktop.systemd1.Socket",
2198 .bus_message_handler = bus_socket_message_handler,
2199 .bus_invalidating_properties = bus_socket_invalidating_properties