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 Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser 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>
31 #ifdef HAVE_ATTR_XATTR_H
32 #include <attr/xattr.h>
37 #include "netinet/tcp.h"
39 #include "load-dropin.h"
40 #include "load-fragment.h"
43 #include "path-util.h"
44 #include "unit-name.h"
45 #include "unit-printf.h"
46 #include "dbus-socket.h"
49 #include "bus-errors.h"
51 #include "exit-status.h"
54 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
55 [SOCKET_DEAD] = UNIT_INACTIVE,
56 [SOCKET_START_PRE] = UNIT_ACTIVATING,
57 [SOCKET_START_POST] = UNIT_ACTIVATING,
58 [SOCKET_LISTENING] = UNIT_ACTIVE,
59 [SOCKET_RUNNING] = UNIT_ACTIVE,
60 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
61 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
62 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
63 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
64 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
65 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
66 [SOCKET_FAILED] = UNIT_FAILED
69 static void socket_init(Unit *u) {
70 Socket *s = SOCKET(u);
73 assert(u->load_state == UNIT_STUB);
75 s->backlog = SOMAXCONN;
76 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
77 s->directory_mode = 0755;
78 s->socket_mode = 0666;
80 s->max_connections = 64;
87 exec_context_init(&s->exec_context);
88 s->exec_context.std_output = u->manager->default_std_output;
89 s->exec_context.std_error = u->manager->default_std_error;
90 kill_context_init(&s->kill_context);
92 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
95 static void socket_unwatch_control_pid(Socket *s) {
98 if (s->control_pid <= 0)
101 unit_unwatch_pid(UNIT(s), s->control_pid);
105 void socket_free_ports(Socket *s) {
110 while ((p = s->ports)) {
111 LIST_REMOVE(SocketPort, port, s->ports, p);
114 unit_unwatch_fd(UNIT(s), &p->fd_watch);
115 close_nointr_nofail(p->fd);
123 static void socket_done(Unit *u) {
124 Socket *s = SOCKET(u);
128 socket_free_ports(s);
130 exec_context_done(&s->exec_context, manager_is_reloading_or_reexecuting(u->manager));
131 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
132 s->control_command = NULL;
134 socket_unwatch_control_pid(s);
136 unit_ref_unset(&s->service);
138 free(s->tcp_congestion);
139 s->tcp_congestion = NULL;
141 free(s->bind_to_device);
142 s->bind_to_device = NULL;
145 free(s->smack_ip_in);
146 free(s->smack_ip_out);
148 unit_unwatch_timer(u, &s->timer_watch);
151 static int socket_instantiate_service(Socket *s) {
158 /* This fills in s->service if it isn't filled in yet. For
159 * Accept=yes sockets we create the next connection service
160 * here. For Accept=no this is mostly a NOP since the service
161 * is figured out at load time anyway. */
163 if (UNIT_DEREF(s->service))
168 if (!(prefix = unit_name_to_prefix(UNIT(s)->id)))
171 r = asprintf(&name, "%s@%u.service", prefix, s->n_accepted);
177 r = manager_load_unit(UNIT(s)->manager, name, NULL, NULL, &u);
183 #ifdef HAVE_SYSV_COMPAT
184 if (SERVICE(u)->is_sysv) {
185 log_error("Using SysV services for socket activation is not supported. Refusing.");
191 unit_ref_set(&s->service, u);
193 return unit_add_two_dependencies(UNIT(s), UNIT_BEFORE, UNIT_TRIGGERS, u, false);
196 static bool have_non_accept_socket(Socket *s) {
204 LIST_FOREACH(port, p, s->ports) {
206 if (p->type != SOCKET_SOCKET)
209 if (!socket_address_can_accept(&p->address))
216 static int socket_verify(Socket *s) {
219 if (UNIT(s)->load_state != UNIT_LOADED)
223 log_error_unit(UNIT(s)->id,
224 "%s lacks Listen setting. Refusing.", UNIT(s)->id);
228 if (s->accept && have_non_accept_socket(s)) {
229 log_error_unit(UNIT(s)->id,
230 "%s configured for accepting sockets, but sockets are non-accepting. Refusing.",
235 if (s->accept && s->max_connections <= 0) {
236 log_error_unit(UNIT(s)->id,
237 "%s's MaxConnection setting too small. Refusing.", UNIT(s)->id);
241 if (s->accept && UNIT_DEREF(s->service)) {
242 log_error_unit(UNIT(s)->id,
243 "Explicit service configuration for accepting sockets not supported on %s. Refusing.",
248 if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) {
249 log_error_unit(UNIT(s)->id,
250 "%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.",
258 static bool socket_needs_mount(Socket *s, const char *prefix) {
263 LIST_FOREACH(port, p, s->ports) {
265 if (p->type == SOCKET_SOCKET) {
266 if (socket_address_needs_mount(&p->address, prefix))
268 } else if (p->type == SOCKET_FIFO || p->type == SOCKET_SPECIAL) {
269 if (path_startswith(p->path, prefix))
277 int socket_add_one_mount_link(Socket *s, Mount *m) {
283 if (UNIT(s)->load_state != UNIT_LOADED ||
284 UNIT(m)->load_state != UNIT_LOADED)
287 if (!socket_needs_mount(s, m->where))
290 r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true);
297 static int socket_add_mount_links(Socket *s) {
303 LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_MOUNT]) {
304 r = socket_add_one_mount_link(s, MOUNT(other));
312 static int socket_add_device_link(Socket *s) {
318 if (!s->bind_to_device || streq(s->bind_to_device, "lo"))
321 if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
324 r = unit_add_node_link(UNIT(s), t, false);
330 static int socket_add_default_dependencies(Socket *s) {
334 if (UNIT(s)->manager->running_as == SYSTEMD_SYSTEM) {
335 if ((r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
338 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
342 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
345 static bool socket_has_exec(Socket *s) {
349 for (i = 0; i < _SOCKET_EXEC_COMMAND_MAX; i++)
350 if (s->exec_command[i])
356 static int socket_load(Unit *u) {
357 Socket *s = SOCKET(u);
361 assert(u->load_state == UNIT_STUB);
363 if ((r = unit_load_fragment_and_dropin(u)) < 0)
366 /* This is a new unit? Then let's add in some extras */
367 if (u->load_state == UNIT_LOADED) {
369 if (have_non_accept_socket(s)) {
371 if (!UNIT_DEREF(s->service)) {
374 r = unit_load_related_unit(u, ".service", &x);
378 unit_ref_set(&s->service, x);
381 r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true);
386 if ((r = socket_add_mount_links(s)) < 0)
389 if ((r = socket_add_device_link(s)) < 0)
392 if (socket_has_exec(s))
393 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
396 if ((r = unit_add_default_cgroups(u)) < 0)
399 if (UNIT(s)->default_dependencies)
400 if ((r = socket_add_default_dependencies(s)) < 0)
403 r = unit_exec_context_defaults(u, &s->exec_context);
408 return socket_verify(s);
411 static const char* listen_lookup(int family, int type) {
413 if (family == AF_NETLINK)
414 return "ListenNetlink";
416 if (type == SOCK_STREAM)
417 return "ListenStream";
418 else if (type == SOCK_DGRAM)
419 return "ListenDatagram";
420 else if (type == SOCK_SEQPACKET)
421 return "ListenSequentialPacket";
423 assert_not_reached("Unknown socket type");
427 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
430 Socket *s = SOCKET(u);
438 p2 = strappend(prefix, "\t");
439 prefix2 = p2 ? p2 : prefix;
442 "%sSocket State: %s\n"
444 "%sBindIPv6Only: %s\n"
446 "%sSocketMode: %04o\n"
447 "%sDirectoryMode: %04o\n"
450 "%sTransparent: %s\n"
452 "%sPassCredentials: %s\n"
453 "%sPassSecurity: %s\n"
454 "%sTCPCongestion: %s\n",
455 prefix, socket_state_to_string(s->state),
456 prefix, socket_result_to_string(s->result),
457 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
459 prefix, s->socket_mode,
460 prefix, s->directory_mode,
461 prefix, yes_no(s->keep_alive),
462 prefix, yes_no(s->free_bind),
463 prefix, yes_no(s->transparent),
464 prefix, yes_no(s->broadcast),
465 prefix, yes_no(s->pass_cred),
466 prefix, yes_no(s->pass_sec),
467 prefix, strna(s->tcp_congestion));
469 if (s->control_pid > 0)
471 "%sControl PID: %lu\n",
472 prefix, (unsigned long) s->control_pid);
474 if (s->bind_to_device)
476 "%sBindToDevice: %s\n",
477 prefix, s->bind_to_device);
482 "%sNConnections: %u\n"
483 "%sMaxConnections: %u\n",
484 prefix, s->n_accepted,
485 prefix, s->n_connections,
486 prefix, s->max_connections);
488 if (s->priority >= 0)
491 prefix, s->priority);
493 if (s->receive_buffer > 0)
495 "%sReceiveBuffer: %zu\n",
496 prefix, s->receive_buffer);
498 if (s->send_buffer > 0)
500 "%sSendBuffer: %zu\n",
501 prefix, s->send_buffer);
513 if (s->pipe_size > 0)
516 prefix, s->pipe_size);
523 if (s->mq_maxmsg > 0)
525 "%sMessageQueueMaxMessages: %li\n",
526 prefix, s->mq_maxmsg);
528 if (s->mq_msgsize > 0)
530 "%sMessageQueueMessageSize: %li\n",
531 prefix, s->mq_msgsize);
535 "%sSmackLabel: %s\n",
540 "%sSmackLabelIPIn: %s\n",
541 prefix, s->smack_ip_in);
545 "%sSmackLabelIPOut: %s\n",
546 prefix, s->smack_ip_out);
548 LIST_FOREACH(port, p, s->ports) {
550 if (p->type == SOCKET_SOCKET) {
555 if ((r = socket_address_print(&p->address, &k)) < 0)
560 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t);
562 } else if (p->type == SOCKET_SPECIAL)
563 fprintf(f, "%sListenSpecial: %s\n", prefix, p->path);
564 else if (p->type == SOCKET_MQUEUE)
565 fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path);
567 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
570 exec_context_dump(&s->exec_context, f, prefix);
571 kill_context_dump(&s->kill_context, f, prefix);
573 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
574 if (!s->exec_command[c])
577 fprintf(f, "%s-> %s:\n",
578 prefix, socket_exec_command_to_string(c));
580 exec_command_dump_list(s->exec_command[c], f, prefix2);
586 static int instance_from_socket(int fd, unsigned nr, char **instance) {
591 struct sockaddr_un un;
592 struct sockaddr_in in;
593 struct sockaddr_in6 in6;
594 struct sockaddr_storage storage;
601 if (getsockname(fd, &local.sa, &l) < 0)
605 if (getpeername(fd, &remote.sa, &l) < 0)
608 switch (local.sa.sa_family) {
612 a = ntohl(local.in.sin_addr.s_addr),
613 b = ntohl(remote.in.sin_addr.s_addr);
616 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
618 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
619 ntohs(local.in.sin_port),
620 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
621 ntohs(remote.in.sin_port)) < 0)
628 static const unsigned char ipv4_prefix[] = {
629 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
632 if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 &&
633 memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
635 *a = local.in6.sin6_addr.s6_addr+12,
636 *b = remote.in6.sin6_addr.s6_addr+12;
639 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
641 a[0], a[1], a[2], a[3],
642 ntohs(local.in6.sin6_port),
643 b[0], b[1], b[2], b[3],
644 ntohs(remote.in6.sin6_port)) < 0)
647 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
652 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
653 ntohs(local.in6.sin6_port),
654 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
655 ntohs(remote.in6.sin6_port)) < 0)
666 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
672 (unsigned long) ucred.pid,
673 (unsigned long) ucred.uid) < 0)
680 assert_not_reached("Unhandled socket type.");
687 static void socket_close_fds(Socket *s) {
692 LIST_FOREACH(port, p, s->ports) {
696 unit_unwatch_fd(UNIT(s), &p->fd_watch);
697 close_nointr_nofail(p->fd);
699 /* One little note: we should never delete any sockets
700 * in the file system here! After all some other
701 * process we spawned might still have a reference of
702 * this fd and wants to continue to use it. Therefore
703 * we delete sockets in the file system before we
704 * create a new one, not after we stopped using
711 static void socket_apply_socket_options(Socket *s, int fd) {
716 int b = s->keep_alive;
717 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0)
718 log_warning_unit(UNIT(s)->id, "SO_KEEPALIVE failed: %m");
723 if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0)
724 log_warning_unit(UNIT(s)->id, "SO_BROADCAST failed: %m");
729 if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0)
730 log_warning_unit(UNIT(s)->id, "SO_PASSCRED failed: %m");
735 if (setsockopt(fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one)) < 0)
736 log_warning_unit(UNIT(s)->id, "SO_PASSSEC failed: %m");
739 if (s->priority >= 0)
740 if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0)
741 log_warning_unit(UNIT(s)->id, "SO_PRIORITY failed: %m");
743 if (s->receive_buffer > 0) {
744 int value = (int) s->receive_buffer;
746 /* We first try with SO_RCVBUFFORCE, in case we have the perms for that */
748 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0)
749 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
750 log_warning_unit(UNIT(s)->id, "SO_RCVBUF failed: %m");
753 if (s->send_buffer > 0) {
754 int value = (int) s->send_buffer;
755 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0)
756 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
757 log_warning_unit(UNIT(s)->id, "SO_SNDBUF failed: %m");
761 if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0)
762 log_warning_unit(UNIT(s)->id, "SO_MARK failed: %m");
765 if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0)
766 log_warning_unit(UNIT(s)->id, "IP_TOS failed: %m");
768 if (s->ip_ttl >= 0) {
771 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
773 if (socket_ipv6_is_supported())
774 x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
777 errno = EAFNOSUPPORT;
781 log_warning_unit(UNIT(s)->id,
782 "IP_TTL/IPV6_UNICAST_HOPS failed: %m");
785 if (s->tcp_congestion)
786 if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0)
787 log_warning_unit(UNIT(s)->id, "TCP_CONGESTION failed: %m");
789 #ifdef HAVE_ATTR_XATTR_H
791 if (fsetxattr(fd, "security.SMACK64IPIN", s->smack_ip_in, strlen(s->smack_ip_in), 0) < 0)
792 log_error_unit(UNIT(s)->id,
793 "fsetxattr(\"security.SMACK64IPIN\"): %m");
796 if (fsetxattr(fd, "security.SMACK64IPOUT", s->smack_ip_out, strlen(s->smack_ip_out), 0) < 0)
797 log_error_unit(UNIT(s)->id,
798 "fsetxattr(\"security.SMACK64IPOUT\"): %m");
802 static void socket_apply_fifo_options(Socket *s, int fd) {
806 if (s->pipe_size > 0)
807 if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0)
808 log_warning_unit(UNIT(s)->id,
811 #ifdef HAVE_ATTR_XATTR_H
813 if (fsetxattr(fd, "security.SMACK64", s->smack, strlen(s->smack), 0) < 0)
814 log_error_unit(UNIT(s)->id,
815 "fsetxattr(\"security.SMACK64\"): %m");
819 static int fifo_address_create(
821 mode_t directory_mode,
832 mkdir_parents_label(path, directory_mode);
834 r = label_context_set(path, S_IFIFO);
838 /* Enforce the right access mode for the fifo */
839 old_mask = umask(~ socket_mode);
841 /* Include the original umask in our mask */
842 umask(~socket_mode | old_mask);
844 r = mkfifo(path, socket_mode);
847 if (r < 0 && errno != EEXIST) {
852 if ((fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
857 label_context_clear();
859 if (fstat(fd, &st) < 0) {
864 if (!S_ISFIFO(st.st_mode) ||
865 (st.st_mode & 0777) != (socket_mode & ~old_mask) ||
866 st.st_uid != getuid() ||
867 st.st_gid != getgid()) {
877 label_context_clear();
880 close_nointr_nofail(fd);
885 static int special_address_create(
895 if ((fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
900 if (fstat(fd, &st) < 0) {
905 /* Check whether this is a /proc, /sys or /dev file or char device */
906 if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) {
916 close_nointr_nofail(fd);
921 static int mq_address_create(
931 struct mq_attr _attr, *attr = NULL;
936 if (maxmsg > 0 && msgsize > 0) {
938 _attr.mq_flags = O_NONBLOCK;
939 _attr.mq_maxmsg = maxmsg;
940 _attr.mq_msgsize = msgsize;
944 /* Enforce the right access mode for the mq */
945 old_mask = umask(~ mq_mode);
947 /* Include the original umask in our mask */
948 umask(~mq_mode | old_mask);
950 fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr);
958 if (fstat(fd, &st) < 0) {
963 if ((st.st_mode & 0777) != (mq_mode & ~old_mask) ||
964 st.st_uid != getuid() ||
965 st.st_gid != getgid()) {
976 close_nointr_nofail(fd);
981 static int socket_open_fds(Socket *s) {
985 bool know_label = false;
989 LIST_FOREACH(port, p, s->ports) {
994 if (p->type == SOCKET_SOCKET) {
998 if ((r = socket_instantiate_service(s)) < 0)
1001 if (UNIT_DEREF(s->service) &&
1002 SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]) {
1003 r = label_get_create_label_from_exe(SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]->path, &label);
1014 if ((r = socket_address_listen(
1027 socket_apply_socket_options(s, p->fd);
1029 } else if (p->type == SOCKET_SPECIAL) {
1031 if ((r = special_address_create(
1036 } else if (p->type == SOCKET_FIFO) {
1038 if ((r = fifo_address_create(
1045 socket_apply_fifo_options(s, p->fd);
1046 } else if (p->type == SOCKET_MQUEUE) {
1048 if ((r = mq_address_create(
1056 assert_not_reached("Unknown port type");
1063 socket_close_fds(s);
1068 static void socket_unwatch_fds(Socket *s) {
1073 LIST_FOREACH(port, p, s->ports) {
1077 unit_unwatch_fd(UNIT(s), &p->fd_watch);
1081 static int socket_watch_fds(Socket *s) {
1087 LIST_FOREACH(port, p, s->ports) {
1091 p->fd_watch.socket_accept =
1093 p->type == SOCKET_SOCKET &&
1094 socket_address_can_accept(&p->address);
1096 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
1103 socket_unwatch_fds(s);
1107 static void socket_set_state(Socket *s, SocketState state) {
1108 SocketState old_state;
1111 old_state = s->state;
1114 if (state != SOCKET_START_PRE &&
1115 state != SOCKET_START_POST &&
1116 state != SOCKET_STOP_PRE &&
1117 state != SOCKET_STOP_PRE_SIGTERM &&
1118 state != SOCKET_STOP_PRE_SIGKILL &&
1119 state != SOCKET_STOP_POST &&
1120 state != SOCKET_FINAL_SIGTERM &&
1121 state != SOCKET_FINAL_SIGKILL) {
1122 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1123 socket_unwatch_control_pid(s);
1124 s->control_command = NULL;
1125 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1128 if (state != SOCKET_LISTENING)
1129 socket_unwatch_fds(s);
1131 if (state != SOCKET_START_POST &&
1132 state != SOCKET_LISTENING &&
1133 state != SOCKET_RUNNING &&
1134 state != SOCKET_STOP_PRE &&
1135 state != SOCKET_STOP_PRE_SIGTERM &&
1136 state != SOCKET_STOP_PRE_SIGKILL)
1137 socket_close_fds(s);
1139 if (state != old_state)
1140 log_debug_unit(UNIT(s)->id,
1141 "%s changed %s -> %s", UNIT(s)->id,
1142 socket_state_to_string(old_state),
1143 socket_state_to_string(state));
1145 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
1148 static int socket_coldplug(Unit *u) {
1149 Socket *s = SOCKET(u);
1153 assert(s->state == SOCKET_DEAD);
1155 if (s->deserialized_state != s->state) {
1157 if (s->deserialized_state == SOCKET_START_PRE ||
1158 s->deserialized_state == SOCKET_START_POST ||
1159 s->deserialized_state == SOCKET_STOP_PRE ||
1160 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1161 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
1162 s->deserialized_state == SOCKET_STOP_POST ||
1163 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
1164 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
1166 if (s->control_pid <= 0)
1169 r = unit_watch_pid(UNIT(s), s->control_pid);
1173 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_usec, &s->timer_watch);
1178 if (s->deserialized_state == SOCKET_START_POST ||
1179 s->deserialized_state == SOCKET_LISTENING ||
1180 s->deserialized_state == SOCKET_RUNNING ||
1181 s->deserialized_state == SOCKET_STOP_PRE ||
1182 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
1183 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
1184 if ((r = socket_open_fds(s)) < 0)
1187 if (s->deserialized_state == SOCKET_LISTENING)
1188 if ((r = socket_watch_fds(s)) < 0)
1191 socket_set_state(s, s->deserialized_state);
1197 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
1206 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_usec, &s->timer_watch);
1210 argv = unit_full_printf_strv(UNIT(s), c->argv);
1220 UNIT(s)->manager->environment,
1224 UNIT(s)->manager->confirm_spawn,
1225 UNIT(s)->cgroup_bondings,
1226 UNIT(s)->cgroup_attributes,
1236 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1237 /* FIXME: we need to do something here */
1245 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1250 static void socket_enter_dead(Socket *s, SocketResult f) {
1253 if (f != SOCKET_SUCCESS)
1256 exec_context_tmp_dirs_done(&s->exec_context);
1257 socket_set_state(s, s->result != SOCKET_SUCCESS ? SOCKET_FAILED : SOCKET_DEAD);
1260 static void socket_enter_signal(Socket *s, SocketState state, SocketResult f);
1262 static void socket_enter_stop_post(Socket *s, SocketResult f) {
1266 if (f != SOCKET_SUCCESS)
1269 socket_unwatch_control_pid(s);
1271 s->control_command_id = SOCKET_EXEC_STOP_POST;
1273 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
1274 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1277 socket_set_state(s, SOCKET_STOP_POST);
1279 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_SUCCESS);
1284 log_warning_unit(UNIT(s)->id,
1285 "%s failed to run 'stop-post' task: %s",
1286 UNIT(s)->id, strerror(-r));
1287 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES);
1290 static void socket_enter_signal(Socket *s, SocketState state, SocketResult f) {
1295 if (f != SOCKET_SUCCESS)
1298 r = unit_kill_context(
1301 state != SOCKET_STOP_PRE_SIGTERM && state != SOCKET_FINAL_SIGTERM,
1309 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_usec, &s->timer_watch);
1313 socket_set_state(s, state);
1314 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1315 socket_enter_stop_post(s, SOCKET_SUCCESS);
1317 socket_enter_dead(s, SOCKET_SUCCESS);
1322 log_warning_unit(UNIT(s)->id,
1323 "%s failed to kill processes: %s",
1324 UNIT(s)->id, strerror(-r));
1326 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
1327 socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES);
1329 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
1332 static void socket_enter_stop_pre(Socket *s, SocketResult f) {
1336 if (f != SOCKET_SUCCESS)
1339 socket_unwatch_control_pid(s);
1341 s->control_command_id = SOCKET_EXEC_STOP_PRE;
1343 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
1344 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1347 socket_set_state(s, SOCKET_STOP_PRE);
1349 socket_enter_stop_post(s, SOCKET_SUCCESS);
1354 log_warning_unit(UNIT(s)->id,
1355 "%s failed to run 'stop-pre' task: %s",
1356 UNIT(s)->id, strerror(-r));
1357 socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES);
1360 static void socket_enter_listening(Socket *s) {
1364 r = socket_watch_fds(s);
1366 log_warning_unit(UNIT(s)->id,
1367 "%s failed to watch sockets: %s",
1368 UNIT(s)->id, strerror(-r));
1372 socket_set_state(s, SOCKET_LISTENING);
1376 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1379 static void socket_enter_start_post(Socket *s) {
1383 r = socket_open_fds(s);
1385 log_warning_unit(UNIT(s)->id,
1386 "%s failed to listen on sockets: %s",
1387 UNIT(s)->id, strerror(-r));
1391 socket_unwatch_control_pid(s);
1393 s->control_command_id = SOCKET_EXEC_START_POST;
1395 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
1396 r = socket_spawn(s, s->control_command, &s->control_pid);
1398 log_warning_unit(UNIT(s)->id,
1399 "%s failed to run 'start-post' task: %s",
1400 UNIT(s)->id, strerror(-r));
1404 socket_set_state(s, SOCKET_START_POST);
1406 socket_enter_listening(s);
1411 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1414 static void socket_enter_start_pre(Socket *s) {
1418 socket_unwatch_control_pid(s);
1420 s->control_command_id = SOCKET_EXEC_START_PRE;
1422 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
1423 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1426 socket_set_state(s, SOCKET_START_PRE);
1428 socket_enter_start_post(s);
1433 log_warning_unit(UNIT(s)->id,
1434 "%s failed to run 'start-pre' task: %s",
1435 UNIT(s)->id, strerror(-r));
1436 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
1439 static void socket_enter_running(Socket *s, int cfd) {
1444 dbus_error_init(&error);
1446 /* We don't take connections anymore if we are supposed to
1447 * shut down anyway */
1448 if (unit_pending_inactive(UNIT(s))) {
1449 log_debug_unit(UNIT(s)->id,
1450 "Suppressing connection request on %s since unit stop is scheduled.",
1454 close_nointr_nofail(cfd);
1456 /* Flush all sockets by closing and reopening them */
1457 socket_close_fds(s);
1459 r = socket_watch_fds(s);
1461 log_warning_unit(UNIT(s)->id,
1462 "%s failed to watch sockets: %s",
1463 UNIT(s)->id, strerror(-r));
1464 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1474 bool pending = false;
1476 /* If there's already a start pending don't bother to
1478 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERS], i)
1479 if (unit_pending_active(u)) {
1485 r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT_DEREF(s->service), JOB_REPLACE, true, &error, NULL);
1490 socket_set_state(s, SOCKET_RUNNING);
1492 char *prefix, *instance = NULL, *name;
1495 if (s->n_connections >= s->max_connections) {
1496 log_warning_unit(UNIT(s)->id,
1497 "%s: Too many incoming connections (%u)",
1498 UNIT(s)->id, s->n_connections);
1499 close_nointr_nofail(cfd);
1503 r = socket_instantiate_service(s);
1507 r = instance_from_socket(cfd, s->n_accepted, &instance);
1512 /* ENOTCONN is legitimate if TCP RST was received.
1513 * This connection is over, but the socket unit lives on. */
1514 close_nointr_nofail(cfd);
1518 prefix = unit_name_to_prefix(UNIT(s)->id);
1525 name = unit_name_build(prefix, instance, ".service");
1534 r = unit_add_name(UNIT_DEREF(s->service), name);
1540 service = SERVICE(UNIT_DEREF(s->service));
1541 unit_ref_unset(&s->service);
1544 UNIT(service)->no_gc = false;
1546 unit_choose_id(UNIT(service), name);
1549 r = service_set_socket_fd(service, cfd, s);
1554 s->n_connections ++;
1556 r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT(service), JOB_REPLACE, true, &error, NULL);
1560 /* Notify clients about changed counters */
1561 unit_add_to_dbus_queue(UNIT(s));
1567 log_warning_unit(UNIT(s)->id,
1568 "%s failed to queue service startup job (Maybe the service file is missing or not a %s unit?): %s",
1570 cfd >= 0 ? "template" : "non-template",
1571 bus_error(&error, r));
1572 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1575 close_nointr_nofail(cfd);
1577 dbus_error_free(&error);
1580 static void socket_run_next(Socket *s) {
1584 assert(s->control_command);
1585 assert(s->control_command->command_next);
1587 socket_unwatch_control_pid(s);
1589 s->control_command = s->control_command->command_next;
1591 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
1597 log_warning_unit(UNIT(s)->id,
1598 "%s failed to run next task: %s",
1599 UNIT(s)->id, strerror(-r));
1601 if (s->state == SOCKET_START_POST)
1602 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
1603 else if (s->state == SOCKET_STOP_POST)
1604 socket_enter_dead(s, SOCKET_FAILURE_RESOURCES);
1606 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES);
1609 static int socket_start(Unit *u) {
1610 Socket *s = SOCKET(u);
1614 /* We cannot fulfill this request right now, try again later
1616 if (s->state == SOCKET_STOP_PRE ||
1617 s->state == SOCKET_STOP_PRE_SIGKILL ||
1618 s->state == SOCKET_STOP_PRE_SIGTERM ||
1619 s->state == SOCKET_STOP_POST ||
1620 s->state == SOCKET_FINAL_SIGTERM ||
1621 s->state == SOCKET_FINAL_SIGKILL)
1624 if (s->state == SOCKET_START_PRE ||
1625 s->state == SOCKET_START_POST)
1628 /* Cannot run this without the service being around */
1629 if (UNIT_DEREF(s->service)) {
1632 service = SERVICE(UNIT_DEREF(s->service));
1634 if (UNIT(service)->load_state != UNIT_LOADED) {
1635 log_error_unit(UNIT(service)->id,
1636 "Socket service %s not loaded, refusing.",
1641 /* If the service is already active we cannot start the
1643 if (service->state != SERVICE_DEAD &&
1644 service->state != SERVICE_FAILED &&
1645 service->state != SERVICE_AUTO_RESTART) {
1646 log_error_unit(UNIT(service)->id,
1647 "Socket service %s already active, refusing.",
1652 #ifdef HAVE_SYSV_COMPAT
1653 if (service->is_sysv) {
1654 log_error_unit(UNIT(s)->id,
1655 "Using SysV services for socket activation is not supported. Refusing.");
1661 assert(s->state == SOCKET_DEAD || s->state == SOCKET_FAILED);
1663 s->result = SOCKET_SUCCESS;
1664 socket_enter_start_pre(s);
1668 static int socket_stop(Unit *u) {
1669 Socket *s = SOCKET(u);
1674 if (s->state == SOCKET_STOP_PRE ||
1675 s->state == SOCKET_STOP_PRE_SIGTERM ||
1676 s->state == SOCKET_STOP_PRE_SIGKILL ||
1677 s->state == SOCKET_STOP_POST ||
1678 s->state == SOCKET_FINAL_SIGTERM ||
1679 s->state == SOCKET_FINAL_SIGKILL)
1682 /* If there's already something running we go directly into
1684 if (s->state == SOCKET_START_PRE ||
1685 s->state == SOCKET_START_POST) {
1686 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_SUCCESS);
1690 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1692 socket_enter_stop_pre(s, SOCKET_SUCCESS);
1696 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1697 Socket *s = SOCKET(u);
1705 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1706 unit_serialize_item(u, f, "result", socket_result_to_string(s->result));
1707 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1709 if (s->control_pid > 0)
1710 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1712 if (s->control_command_id >= 0)
1713 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1715 LIST_FOREACH(port, p, s->ports) {
1721 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1724 if (p->type == SOCKET_SOCKET) {
1727 r = socket_address_print(&p->address, &t);
1731 if (socket_address_family(&p->address) == AF_NETLINK)
1732 unit_serialize_item_format(u, f, "netlink", "%i %s", copy, t);
1734 unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t);
1736 } else if (p->type == SOCKET_SPECIAL)
1737 unit_serialize_item_format(u, f, "special", "%i %s", copy, p->path);
1738 else if (p->type == SOCKET_MQUEUE)
1739 unit_serialize_item_format(u, f, "mqueue", "%i %s", copy, p->path);
1741 assert(p->type == SOCKET_FIFO);
1742 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1746 exec_context_serialize(&s->exec_context, UNIT(s), f);
1751 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1752 Socket *s = SOCKET(u);
1759 if (streq(key, "state")) {
1762 state = socket_state_from_string(value);
1764 log_debug_unit(u->id,
1765 "Failed to parse state value %s", value);
1767 s->deserialized_state = state;
1768 } else if (streq(key, "result")) {
1771 f = socket_result_from_string(value);
1773 log_debug_unit(u->id,
1774 "Failed to parse result value %s", value);
1775 else if (f != SOCKET_SUCCESS)
1778 } else if (streq(key, "n-accepted")) {
1781 if (safe_atou(value, &k) < 0)
1782 log_debug_unit(u->id,
1783 "Failed to parse n-accepted value %s", value);
1786 } else if (streq(key, "control-pid")) {
1789 if (parse_pid(value, &pid) < 0)
1790 log_debug_unit(u->id,
1791 "Failed to parse control-pid value %s", value);
1793 s->control_pid = pid;
1794 } else if (streq(key, "control-command")) {
1795 SocketExecCommand id;
1797 id = socket_exec_command_from_string(value);
1799 log_debug_unit(u->id,
1800 "Failed to parse exec-command value %s", value);
1802 s->control_command_id = id;
1803 s->control_command = s->exec_command[id];
1805 } else if (streq(key, "fifo")) {
1809 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1810 log_debug_unit(u->id,
1811 "Failed to parse fifo value %s", value);
1814 LIST_FOREACH(port, p, s->ports)
1815 if (p->type == SOCKET_FIFO &&
1816 streq_ptr(p->path, value+skip))
1821 close_nointr_nofail(p->fd);
1822 p->fd = fdset_remove(fds, fd);
1826 } else if (streq(key, "special")) {
1830 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1831 log_debug_unit(u->id,
1832 "Failed to parse special value %s", value);
1835 LIST_FOREACH(port, p, s->ports)
1836 if (p->type == SOCKET_SPECIAL &&
1837 streq_ptr(p->path, value+skip))
1842 close_nointr_nofail(p->fd);
1843 p->fd = fdset_remove(fds, fd);
1847 } else if (streq(key, "mqueue")) {
1851 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1852 log_debug_unit(u->id,
1853 "Failed to parse mqueue value %s", value);
1856 LIST_FOREACH(port, p, s->ports)
1857 if (p->type == SOCKET_MQUEUE &&
1858 streq_ptr(p->path, value+skip))
1863 close_nointr_nofail(p->fd);
1864 p->fd = fdset_remove(fds, fd);
1868 } else if (streq(key, "socket")) {
1869 int fd, type, skip = 0;
1872 if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd))
1873 log_debug_unit(u->id,
1874 "Failed to parse socket value %s", value);
1877 LIST_FOREACH(port, p, s->ports)
1878 if (socket_address_is(&p->address, value+skip, type))
1883 close_nointr_nofail(p->fd);
1884 p->fd = fdset_remove(fds, fd);
1888 } else if (streq(key, "netlink")) {
1892 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1893 log_debug_unit(u->id,
1894 "Failed to parse socket value %s", value);
1897 LIST_FOREACH(port, p, s->ports)
1898 if (socket_address_is_netlink(&p->address, value+skip))
1903 close_nointr_nofail(p->fd);
1904 p->fd = fdset_remove(fds, fd);
1907 } else if (streq(key, "tmp-dir")) {
1914 s->exec_context.tmp_dir = t;
1915 } else if (streq(key, "var-tmp-dir")) {
1922 s->exec_context.var_tmp_dir = t;
1924 log_debug_unit(UNIT(s)->id,
1925 "Unknown serialization key '%s'", key);
1930 static int socket_distribute_fds(Unit *u, FDSet *fds) {
1931 Socket *s = SOCKET(u);
1936 LIST_FOREACH(port, p, s->ports) {
1940 if (p->type != SOCKET_SOCKET)
1946 FDSET_FOREACH(fd, fds, i) {
1947 if (socket_address_matches_fd(&p->address, fd)) {
1948 p->fd = fdset_remove(fds, fd);
1949 s->deserialized_state = SOCKET_LISTENING;
1958 static UnitActiveState socket_active_state(Unit *u) {
1961 return state_translation_table[SOCKET(u)->state];
1964 static const char *socket_sub_state_to_string(Unit *u) {
1967 return socket_state_to_string(SOCKET(u)->state);
1970 static bool socket_check_gc(Unit *u) {
1971 Socket *s = SOCKET(u);
1975 return s->n_connections > 0;
1978 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1979 Socket *s = SOCKET(u);
1985 if (s->state != SOCKET_LISTENING)
1988 log_debug_unit(u->id, "Incoming traffic on %s", u->id);
1990 if (events != EPOLLIN) {
1992 if (events & EPOLLHUP)
1993 log_error_unit(u->id,
1994 "%s: Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that.",
1997 log_error_unit(u->id,
1998 "%s: Got unexpected poll event (0x%x) on socket.",
2004 if (w->socket_accept) {
2007 cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK);
2013 log_error_unit(u->id,
2014 "Failed to accept socket: %m");
2021 socket_apply_socket_options(s, cfd);
2024 socket_enter_running(s, cfd);
2028 socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
2031 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2032 Socket *s = SOCKET(u);
2038 if (pid != s->control_pid)
2043 if (is_clean_exit(code, status, NULL))
2045 else if (code == CLD_EXITED)
2046 f = SOCKET_FAILURE_EXIT_CODE;
2047 else if (code == CLD_KILLED)
2048 f = SOCKET_FAILURE_SIGNAL;
2049 else if (code == CLD_DUMPED)
2050 f = SOCKET_FAILURE_CORE_DUMP;
2052 assert_not_reached("Unknown code");
2054 if (s->control_command) {
2055 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2057 if (s->control_command->ignore)
2061 log_full_unit(f == SOCKET_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2063 "%s control process exited, code=%s status=%i",
2064 u->id, sigchld_code_to_string(code), status);
2066 if (f != SOCKET_SUCCESS)
2069 if (s->control_command &&
2070 s->control_command->command_next &&
2071 f == SOCKET_SUCCESS) {
2073 log_debug_unit(u->id,
2074 "%s running next command for state %s",
2075 u->id, socket_state_to_string(s->state));
2078 s->control_command = NULL;
2079 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
2081 /* No further commands for this step, so let's figure
2082 * out what to do next */
2084 log_debug_unit(u->id,
2085 "%s got final SIGCHLD for state %s",
2086 u->id, socket_state_to_string(s->state));
2090 case SOCKET_START_PRE:
2091 if (f == SOCKET_SUCCESS)
2092 socket_enter_start_post(s);
2094 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, f);
2097 case SOCKET_START_POST:
2098 if (f == SOCKET_SUCCESS)
2099 socket_enter_listening(s);
2101 socket_enter_stop_pre(s, f);
2104 case SOCKET_STOP_PRE:
2105 case SOCKET_STOP_PRE_SIGTERM:
2106 case SOCKET_STOP_PRE_SIGKILL:
2107 socket_enter_stop_post(s, f);
2110 case SOCKET_STOP_POST:
2111 case SOCKET_FINAL_SIGTERM:
2112 case SOCKET_FINAL_SIGKILL:
2113 socket_enter_dead(s, f);
2117 assert_not_reached("Uh, control process died at wrong time.");
2121 /* Notify clients about changed exit status */
2122 unit_add_to_dbus_queue(u);
2125 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
2126 Socket *s = SOCKET(u);
2129 assert(elapsed == 1);
2130 assert(w == &s->timer_watch);
2134 case SOCKET_START_PRE:
2135 log_warning_unit(u->id,
2136 "%s starting timed out. Terminating.", u->id);
2137 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT);
2140 case SOCKET_START_POST:
2141 log_warning_unit(u->id,
2142 "%s starting timed out. Stopping.", u->id);
2143 socket_enter_stop_pre(s, SOCKET_FAILURE_TIMEOUT);
2146 case SOCKET_STOP_PRE:
2147 log_warning_unit(u->id,
2148 "%s stopping timed out. Terminating.", u->id);
2149 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_FAILURE_TIMEOUT);
2152 case SOCKET_STOP_PRE_SIGTERM:
2153 if (s->kill_context.send_sigkill) {
2154 log_warning_unit(u->id,
2155 "%s stopping timed out. Killing.", u->id);
2156 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_FAILURE_TIMEOUT);
2158 log_warning_unit(u->id,
2159 "%s stopping timed out. Skipping SIGKILL. Ignoring.",
2161 socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT);
2165 case SOCKET_STOP_PRE_SIGKILL:
2166 log_warning_unit(u->id,
2167 "%s still around after SIGKILL. Ignoring.", u->id);
2168 socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT);
2171 case SOCKET_STOP_POST:
2172 log_warning_unit(u->id,
2173 "%s stopping timed out (2). Terminating.", u->id);
2174 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT);
2177 case SOCKET_FINAL_SIGTERM:
2178 if (s->kill_context.send_sigkill) {
2179 log_warning_unit(u->id,
2180 "%s stopping timed out (2). Killing.", u->id);
2181 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_FAILURE_TIMEOUT);
2183 log_warning_unit(u->id,
2184 "%s stopping timed out (2). Skipping SIGKILL. Ignoring.",
2186 socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT);
2190 case SOCKET_FINAL_SIGKILL:
2191 log_warning_unit(u->id,
2192 "%s still around after SIGKILL (2). Entering failed mode.",
2194 socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT);
2198 assert_not_reached("Timeout at wrong time.");
2202 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
2211 /* Called from the service code for requesting our fds */
2214 LIST_FOREACH(port, p, s->ports)
2224 if (!(rfds = new(int, rn_fds)))
2228 LIST_FOREACH(port, p, s->ports)
2232 assert(k == rn_fds);
2240 void socket_notify_service_dead(Socket *s, bool failed_permanent) {
2243 /* The service is dead. Dang!
2245 * This is strictly for one-instance-for-all-connections
2248 if (s->state == SOCKET_RUNNING) {
2249 log_debug_unit(UNIT(s)->id,
2250 "%s got notified about service death (failed permanently: %s)",
2251 UNIT(s)->id, yes_no(failed_permanent));
2252 if (failed_permanent)
2253 socket_enter_stop_pre(s, SOCKET_FAILURE_SERVICE_FAILED_PERMANENT);
2255 socket_enter_listening(s);
2259 void socket_connection_unref(Socket *s) {
2262 /* The service is dead. Yay!
2264 * This is strictly for one-instance-per-connection
2267 assert(s->n_connections > 0);
2270 log_debug_unit(UNIT(s)->id,
2271 "%s: One connection closed, %u left.", UNIT(s)->id, s->n_connections);
2274 static void socket_reset_failed(Unit *u) {
2275 Socket *s = SOCKET(u);
2279 if (s->state == SOCKET_FAILED)
2280 socket_set_state(s, SOCKET_DEAD);
2282 s->result = SOCKET_SUCCESS;
2285 static int socket_kill(Unit *u, KillWho who, int signo, DBusError *error) {
2286 return unit_kill_common(u, who, signo, -1, SOCKET(u)->control_pid, error);
2289 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
2290 [SOCKET_DEAD] = "dead",
2291 [SOCKET_START_PRE] = "start-pre",
2292 [SOCKET_START_POST] = "start-post",
2293 [SOCKET_LISTENING] = "listening",
2294 [SOCKET_RUNNING] = "running",
2295 [SOCKET_STOP_PRE] = "stop-pre",
2296 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
2297 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
2298 [SOCKET_STOP_POST] = "stop-post",
2299 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
2300 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
2301 [SOCKET_FAILED] = "failed"
2304 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
2306 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
2307 [SOCKET_EXEC_START_PRE] = "StartPre",
2308 [SOCKET_EXEC_START_POST] = "StartPost",
2309 [SOCKET_EXEC_STOP_PRE] = "StopPre",
2310 [SOCKET_EXEC_STOP_POST] = "StopPost"
2313 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
2315 static const char* const socket_result_table[_SOCKET_RESULT_MAX] = {
2316 [SOCKET_SUCCESS] = "success",
2317 [SOCKET_FAILURE_RESOURCES] = "resources",
2318 [SOCKET_FAILURE_TIMEOUT] = "timeout",
2319 [SOCKET_FAILURE_EXIT_CODE] = "exit-code",
2320 [SOCKET_FAILURE_SIGNAL] = "signal",
2321 [SOCKET_FAILURE_CORE_DUMP] = "core-dump",
2322 [SOCKET_FAILURE_SERVICE_FAILED_PERMANENT] = "service-failed-permanent"
2325 DEFINE_STRING_TABLE_LOOKUP(socket_result, SocketResult);
2327 const UnitVTable socket_vtable = {
2328 .object_size = sizeof(Socket),
2335 .exec_context_offset = offsetof(Socket, exec_context),
2336 .exec_section = "Socket",
2338 .init = socket_init,
2339 .done = socket_done,
2340 .load = socket_load,
2342 .kill = socket_kill,
2344 .coldplug = socket_coldplug,
2346 .dump = socket_dump,
2348 .start = socket_start,
2349 .stop = socket_stop,
2351 .serialize = socket_serialize,
2352 .deserialize_item = socket_deserialize_item,
2353 .distribute_fds = socket_distribute_fds,
2355 .active_state = socket_active_state,
2356 .sub_state_to_string = socket_sub_state_to_string,
2358 .check_gc = socket_check_gc,
2360 .fd_event = socket_fd_event,
2361 .sigchld_event = socket_sigchld_event,
2362 .timer_event = socket_timer_event,
2364 .reset_failed = socket_reset_failed,
2366 .bus_interface = "org.freedesktop.systemd1.Socket",
2367 .bus_message_handler = bus_socket_message_handler,
2368 .bus_invalidating_properties = bus_socket_invalidating_properties,
2370 .status_message_formats = {
2371 /*.starting_stopping = {
2372 [0] = "Starting socket %s...",
2373 [1] = "Stopping socket %s...",
2375 .finished_start_job = {
2376 [JOB_DONE] = "Listening on %s.",
2377 [JOB_FAILED] = "Failed to listen on %s.",
2378 [JOB_DEPENDENCY] = "Dependency failed for %s.",
2379 [JOB_TIMEOUT] = "Timed out starting %s.",
2381 .finished_stop_job = {
2382 [JOB_DONE] = "Closed %s.",
2383 [JOB_FAILED] = "Failed stopping %s.",
2384 [JOB_TIMEOUT] = "Timed out stopping %s.",