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>
33 #include "netinet/tcp.h"
35 #include "load-dropin.h"
36 #include "load-fragment.h"
38 #include "unit-name.h"
39 #include "dbus-socket.h"
42 #include "bus-errors.h"
45 static const UnitActiveState state_translation_table
[_SOCKET_STATE_MAX
] = {
46 [SOCKET_DEAD
] = UNIT_INACTIVE
,
47 [SOCKET_START_PRE
] = UNIT_ACTIVATING
,
48 [SOCKET_START_POST
] = UNIT_ACTIVATING
,
49 [SOCKET_LISTENING
] = UNIT_ACTIVE
,
50 [SOCKET_RUNNING
] = UNIT_ACTIVE
,
51 [SOCKET_STOP_PRE
] = UNIT_DEACTIVATING
,
52 [SOCKET_STOP_PRE_SIGTERM
] = UNIT_DEACTIVATING
,
53 [SOCKET_STOP_PRE_SIGKILL
] = UNIT_DEACTIVATING
,
54 [SOCKET_STOP_POST
] = UNIT_DEACTIVATING
,
55 [SOCKET_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
56 [SOCKET_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
57 [SOCKET_FAILED
] = UNIT_FAILED
60 static void socket_init(Unit
*u
) {
61 Socket
*s
= SOCKET(u
);
64 assert(u
->meta
.load_state
== UNIT_STUB
);
66 s
->backlog
= SOMAXCONN
;
67 s
->timeout_usec
= DEFAULT_TIMEOUT_USEC
;
68 s
->directory_mode
= 0755;
69 s
->socket_mode
= 0666;
71 s
->max_connections
= 64;
78 exec_context_init(&s
->exec_context
);
80 s
->control_command_id
= _SOCKET_EXEC_COMMAND_INVALID
;
83 static void socket_unwatch_control_pid(Socket
*s
) {
86 if (s
->control_pid
<= 0)
89 unit_unwatch_pid(UNIT(s
), s
->control_pid
);
93 static void socket_done(Unit
*u
) {
94 Socket
*s
= SOCKET(u
);
100 while ((p
= s
->ports
)) {
101 LIST_REMOVE(SocketPort
, port
, s
->ports
, p
);
104 unit_unwatch_fd(UNIT(s
), &p
->fd_watch
);
105 close_nointr_nofail(p
->fd
);
112 exec_context_done(&s
->exec_context
);
113 exec_command_free_array(s
->exec_command
, _SOCKET_EXEC_COMMAND_MAX
);
114 s
->control_command
= NULL
;
116 socket_unwatch_control_pid(s
);
120 free(s
->tcp_congestion
);
121 s
->tcp_congestion
= NULL
;
123 free(s
->bind_to_device
);
124 s
->bind_to_device
= NULL
;
126 unit_unwatch_timer(u
, &s
->timer_watch
);
128 /* Make sure no service instance refers to us anymore. */
129 LIST_FOREACH(units_per_type
, i
, u
->meta
.manager
->units_per_type
[UNIT_SERVICE
]) {
130 Service
*service
= (Service
*) i
;
132 if (service
->socket
== s
)
133 service
->socket
= NULL
;
137 static int socket_instantiate_service(Socket
*s
) {
144 /* This fills in s->service if it isn't filled in yet. For
145 * Accept=yes sockets we create the next connection service
146 * here. For Accept=no this is mostly a NOP since the service
147 * is figured out at load time anyway. */
154 if (!(prefix
= unit_name_to_prefix(s
->meta
.id
)))
157 r
= asprintf(&name
, "%s@%u.service", prefix
, s
->n_accepted
);
163 r
= manager_load_unit(s
->meta
.manager
, name
, NULL
, NULL
, &u
);
169 u
->meta
.no_gc
= true;
170 s
->service
= SERVICE(u
);
174 static bool have_non_accept_socket(Socket
*s
) {
182 LIST_FOREACH(port
, p
, s
->ports
) {
184 if (p
->type
!= SOCKET_SOCKET
)
187 if (!socket_address_can_accept(&p
->address
))
194 static int socket_verify(Socket
*s
) {
197 if (s
->meta
.load_state
!= UNIT_LOADED
)
201 log_error("%s lacks Listen setting. Refusing.", s
->meta
.id
);
205 if (s
->accept
&& have_non_accept_socket(s
)) {
206 log_error("%s configured for accepting sockets, but sockets are non-accepting. Refusing.", s
->meta
.id
);
210 if (s
->accept
&& s
->max_connections
<= 0) {
211 log_error("%s's MaxConnection setting too small. Refusing.", s
->meta
.id
);
215 if (s
->exec_context
.pam_name
&& s
->exec_context
.kill_mode
!= KILL_CONTROL_GROUP
) {
216 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s
->meta
.id
);
223 static bool socket_needs_mount(Socket
*s
, const char *prefix
) {
228 LIST_FOREACH(port
, p
, s
->ports
) {
230 if (p
->type
== SOCKET_SOCKET
) {
231 if (socket_address_needs_mount(&p
->address
, prefix
))
234 assert(p
->type
== SOCKET_FIFO
);
235 if (path_startswith(p
->path
, prefix
))
243 int socket_add_one_mount_link(Socket
*s
, Mount
*m
) {
249 if (s
->meta
.load_state
!= UNIT_LOADED
||
250 m
->meta
.load_state
!= UNIT_LOADED
)
253 if (!socket_needs_mount(s
, m
->where
))
256 if ((r
= unit_add_two_dependencies(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, UNIT(m
), true)) < 0)
262 static int socket_add_mount_links(Socket
*s
) {
268 LIST_FOREACH(units_per_type
, other
, s
->meta
.manager
->units_per_type
[UNIT_MOUNT
])
269 if ((r
= socket_add_one_mount_link(s
, (Mount
*) other
)) < 0)
275 static int socket_add_device_link(Socket
*s
) {
281 if (!s
->bind_to_device
)
284 if (asprintf(&t
, "/sys/subsystem/net/devices/%s", s
->bind_to_device
) < 0)
287 r
= unit_add_node_link(UNIT(s
), t
, false);
293 static int socket_add_default_dependencies(Socket
*s
) {
297 if (s
->meta
.manager
->running_as
== MANAGER_SYSTEM
)
298 if ((r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, NULL
, true)) < 0)
301 return unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTED_BY
, SPECIAL_SHUTDOWN_TARGET
, NULL
, true);
304 static int socket_load(Unit
*u
) {
305 Socket
*s
= SOCKET(u
);
309 assert(u
->meta
.load_state
== UNIT_STUB
);
311 if ((r
= unit_load_fragment_and_dropin(u
)) < 0)
314 /* This is a new unit? Then let's add in some extras */
315 if (u
->meta
.load_state
== UNIT_LOADED
) {
317 if (have_non_accept_socket(s
)) {
318 if ((r
= unit_load_related_unit(u
, ".service", (Unit
**) &s
->service
)) < 0)
321 if ((r
= unit_add_dependency(u
, UNIT_BEFORE
, UNIT(s
->service
), true)) < 0)
325 if ((r
= socket_add_mount_links(s
)) < 0)
328 if ((r
= socket_add_device_link(s
)) < 0)
331 if ((r
= unit_add_exec_dependencies(u
, &s
->exec_context
)) < 0)
334 if ((r
= unit_add_default_cgroup(u
)) < 0)
337 if (s
->meta
.default_dependencies
)
338 if ((r
= socket_add_default_dependencies(s
)) < 0)
342 return socket_verify(s
);
345 static const char* listen_lookup(int type
) {
347 if (type
== SOCK_STREAM
)
348 return "ListenStream";
349 else if (type
== SOCK_DGRAM
)
350 return "ListenDatagram";
351 else if (type
== SOCK_SEQPACKET
)
352 return "ListenSequentialPacket";
354 assert_not_reached("Unknown socket type");
358 static void socket_dump(Unit
*u
, FILE *f
, const char *prefix
) {
361 Socket
*s
= SOCKET(u
);
369 p2
= strappend(prefix
, "\t");
370 prefix2
= p2
? p2
: prefix
;
373 "%sSocket State: %s\n"
374 "%sBindIPv6Only: %s\n"
376 "%sSocketMode: %04o\n"
377 "%sDirectoryMode: %04o\n"
380 "%sTCPCongestion: %s\n",
381 prefix
, socket_state_to_string(s
->state
),
382 prefix
, socket_address_bind_ipv6_only_to_string(s
->bind_ipv6_only
),
384 prefix
, s
->socket_mode
,
385 prefix
, s
->directory_mode
,
386 prefix
, yes_no(s
->keep_alive
),
387 prefix
, yes_no(s
->free_bind
),
388 prefix
, s
->tcp_congestion
);
390 if (s
->control_pid
> 0)
392 "%sControl PID: %lu\n",
393 prefix
, (unsigned long) s
->control_pid
);
395 if (s
->bind_to_device
)
397 "%sBindToDevice: %s\n",
398 prefix
, s
->bind_to_device
);
403 "%sNConnections: %u\n"
404 "%sMaxConnections: %u\n",
405 prefix
, s
->n_accepted
,
406 prefix
, s
->n_connections
,
407 prefix
, s
->max_connections
);
409 if (s
->priority
>= 0)
412 prefix
, s
->priority
);
414 if (s
->receive_buffer
> 0)
416 "%sReceiveBuffer: %zu\n",
417 prefix
, s
->receive_buffer
);
419 if (s
->send_buffer
> 0)
421 "%sSendBuffer: %zu\n",
422 prefix
, s
->send_buffer
);
434 if (s
->pipe_size
> 0)
437 prefix
, s
->pipe_size
);
444 LIST_FOREACH(port
, p
, s
->ports
) {
446 if (p
->type
== SOCKET_SOCKET
) {
451 if ((r
= socket_address_print(&p
->address
, &k
)) < 0)
456 fprintf(f
, "%s%s: %s\n", prefix
, listen_lookup(p
->address
.type
), t
);
459 fprintf(f
, "%sListenFIFO: %s\n", prefix
, p
->path
);
462 exec_context_dump(&s
->exec_context
, f
, prefix
);
464 for (c
= 0; c
< _SOCKET_EXEC_COMMAND_MAX
; c
++) {
465 if (!s
->exec_command
[c
])
468 fprintf(f
, "%s-> %s:\n",
469 prefix
, socket_exec_command_to_string(c
));
471 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
477 static int instance_from_socket(int fd
, unsigned nr
, char **instance
) {
482 struct sockaddr_un un
;
483 struct sockaddr_in in
;
484 struct sockaddr_in6 in6
;
485 struct sockaddr_storage storage
;
492 if (getsockname(fd
, &local
.sa
, &l
) < 0)
496 if (getpeername(fd
, &remote
.sa
, &l
) < 0)
499 switch (local
.sa
.sa_family
) {
503 a
= ntohl(local
.in
.sin_addr
.s_addr
),
504 b
= ntohl(remote
.in
.sin_addr
.s_addr
);
507 "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
508 a
>> 24, (a
>> 16) & 0xFF, (a
>> 8) & 0xFF, a
& 0xFF,
509 ntohs(local
.in
.sin_port
),
510 b
>> 24, (b
>> 16) & 0xFF, (b
>> 8) & 0xFF, b
& 0xFF,
511 ntohs(remote
.in
.sin_port
)) < 0)
518 static const char ipv4_prefix
[] = {
519 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
522 if (memcmp(&local
.in6
.sin6_addr
, ipv4_prefix
, sizeof(ipv4_prefix
)) == 0 &&
523 memcmp(&remote
.in6
.sin6_addr
, ipv4_prefix
, sizeof(ipv4_prefix
)) == 0) {
525 *a
= local
.in6
.sin6_addr
.s6_addr
+12,
526 *b
= remote
.in6
.sin6_addr
.s6_addr
+12;
529 "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
530 a
[0], a
[1], a
[2], a
[3],
531 ntohs(local
.in6
.sin6_port
),
532 b
[0], b
[1], b
[2], b
[3],
533 ntohs(remote
.in6
.sin6_port
)) < 0)
536 char a
[INET6_ADDRSTRLEN
], b
[INET6_ADDRSTRLEN
];
540 inet_ntop(AF_INET6
, &local
.in6
.sin6_addr
, a
, sizeof(a
)),
541 ntohs(local
.in6
.sin6_port
),
542 inet_ntop(AF_INET6
, &remote
.in6
.sin6_addr
, b
, sizeof(b
)),
543 ntohs(remote
.in6
.sin6_port
)) < 0)
554 if (getsockopt(fd
, SOL_SOCKET
, SO_PEERCRED
, &ucred
, &l
) < 0)
560 (unsigned long) ucred
.pid
,
561 (unsigned long) ucred
.uid
) < 0)
568 assert_not_reached("Unhandled socket type.");
575 static void socket_close_fds(Socket
*s
) {
580 LIST_FOREACH(port
, p
, s
->ports
) {
584 unit_unwatch_fd(UNIT(s
), &p
->fd_watch
);
585 close_nointr_nofail(p
->fd
);
587 /* One little note: we should never delete any sockets
588 * in the file system here! After all some other
589 * process we spawned might still have a reference of
590 * this fd and wants to continue to use it. Therefore
591 * we delete sockets in the file system before we
592 * create a new one, not after we stopped using
599 static void socket_apply_socket_options(Socket
*s
, int fd
) {
604 int b
= s
->keep_alive
;
605 if (setsockopt(fd
, SOL_SOCKET
, SO_KEEPALIVE
, &b
, sizeof(b
)) < 0)
606 log_warning("SO_KEEPALIVE failed: %m");
609 if (s
->priority
>= 0)
610 if (setsockopt(fd
, SOL_SOCKET
, SO_PRIORITY
, &s
->priority
, sizeof(s
->priority
)) < 0)
611 log_warning("SO_PRIORITY failed: %m");
613 if (s
->receive_buffer
> 0) {
614 int value
= (int) s
->receive_buffer
;
615 if (setsockopt(fd
, SOL_SOCKET
, SO_RCVBUF
, &value
, sizeof(value
)) < 0)
616 log_warning("SO_RCVBUF failed: %m");
619 if (s
->send_buffer
> 0) {
620 int value
= (int) s
->send_buffer
;
621 if (setsockopt(fd
, SOL_SOCKET
, SO_SNDBUF
, &value
, sizeof(value
)) < 0)
622 log_warning("SO_SNDBUF failed: %m");
626 if (setsockopt(fd
, SOL_SOCKET
, SO_MARK
, &s
->mark
, sizeof(s
->mark
)) < 0)
627 log_warning("SO_MARK failed: %m");
630 if (setsockopt(fd
, IPPROTO_IP
, IP_TOS
, &s
->ip_tos
, sizeof(s
->ip_tos
)) < 0)
631 log_warning("IP_TOS failed: %m");
633 if (s
->ip_ttl
>= 0) {
636 r
= setsockopt(fd
, IPPROTO_IP
, IP_TTL
, &s
->ip_ttl
, sizeof(s
->ip_ttl
));
637 x
= setsockopt(fd
, IPPROTO_IPV6
, IPV6_UNICAST_HOPS
, &s
->ip_ttl
, sizeof(s
->ip_ttl
));
640 log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
643 if (s
->tcp_congestion
)
644 if (setsockopt(fd
, SOL_TCP
, TCP_CONGESTION
, s
->tcp_congestion
, strlen(s
->tcp_congestion
)+1) < 0)
645 log_warning("TCP_CONGESTION failed: %m");
648 static void socket_apply_fifo_options(Socket
*s
, int fd
) {
652 if (s
->pipe_size
> 0)
653 if (fcntl(fd
, F_SETPIPE_SZ
, s
->pipe_size
) < 0)
654 log_warning("F_SETPIPE_SZ: %m");
658 static int fifo_address_create(
660 mode_t directory_mode
,
671 mkdir_parents(path
, directory_mode
);
673 if ((r
= label_fifofile_set(path
)) < 0)
676 /* Enforce the right access mode for the fifo */
677 old_mask
= umask(~ socket_mode
);
679 /* Include the original umask in our mask */
680 umask(~socket_mode
| old_mask
);
682 r
= mkfifo(path
, socket_mode
);
690 if ((fd
= open(path
, O_RDWR
|O_CLOEXEC
|O_NOCTTY
|O_NONBLOCK
|O_NOFOLLOW
)) < 0) {
697 if (fstat(fd
, &st
) < 0) {
702 if (!S_ISFIFO(st
.st_mode
) ||
703 (st
.st_mode
& 0777) != (socket_mode
& ~old_mask
) ||
704 st
.st_uid
!= getuid() ||
705 st
.st_gid
!= getgid()) {
718 close_nointr_nofail(fd
);
723 static int socket_open_fds(Socket
*s
) {
727 bool know_label
= false;
731 LIST_FOREACH(port
, p
, s
->ports
) {
736 if (p
->type
== SOCKET_SOCKET
) {
740 if ((r
= socket_instantiate_service(s
)) < 0)
743 if ((r
= label_get_socket_label_from_exe(s
->service
->exec_command
[SERVICE_EXEC_START
]->path
, &label
)) < 0)
749 if ((r
= socket_address_listen(
761 socket_apply_socket_options(s
, p
->fd
);
763 } else if (p
->type
== SOCKET_FIFO
) {
765 if ((r
= fifo_address_create(
772 socket_apply_fifo_options(s
, p
->fd
);
775 assert_not_reached("Unknown port type");
787 static void socket_unwatch_fds(Socket
*s
) {
792 LIST_FOREACH(port
, p
, s
->ports
) {
796 unit_unwatch_fd(UNIT(s
), &p
->fd_watch
);
800 static int socket_watch_fds(Socket
*s
) {
806 LIST_FOREACH(port
, p
, s
->ports
) {
810 p
->fd_watch
.socket_accept
=
812 p
->type
== SOCKET_SOCKET
&&
813 socket_address_can_accept(&p
->address
);
815 if ((r
= unit_watch_fd(UNIT(s
), p
->fd
, EPOLLIN
, &p
->fd_watch
)) < 0)
822 socket_unwatch_fds(s
);
826 static void socket_set_state(Socket
*s
, SocketState state
) {
827 SocketState old_state
;
830 old_state
= s
->state
;
833 if (state
!= SOCKET_START_PRE
&&
834 state
!= SOCKET_START_POST
&&
835 state
!= SOCKET_STOP_PRE
&&
836 state
!= SOCKET_STOP_PRE_SIGTERM
&&
837 state
!= SOCKET_STOP_PRE_SIGKILL
&&
838 state
!= SOCKET_STOP_POST
&&
839 state
!= SOCKET_FINAL_SIGTERM
&&
840 state
!= SOCKET_FINAL_SIGKILL
) {
841 unit_unwatch_timer(UNIT(s
), &s
->timer_watch
);
842 socket_unwatch_control_pid(s
);
843 s
->control_command
= NULL
;
844 s
->control_command_id
= _SOCKET_EXEC_COMMAND_INVALID
;
847 if (state
!= SOCKET_LISTENING
)
848 socket_unwatch_fds(s
);
850 if (state
!= SOCKET_START_POST
&&
851 state
!= SOCKET_LISTENING
&&
852 state
!= SOCKET_RUNNING
&&
853 state
!= SOCKET_STOP_PRE
&&
854 state
!= SOCKET_STOP_PRE_SIGTERM
&&
855 state
!= SOCKET_STOP_PRE_SIGKILL
)
858 if (state
!= old_state
)
859 log_debug("%s changed %s -> %s",
861 socket_state_to_string(old_state
),
862 socket_state_to_string(state
));
864 unit_notify(UNIT(s
), state_translation_table
[old_state
], state_translation_table
[state
]);
867 static int socket_coldplug(Unit
*u
) {
868 Socket
*s
= SOCKET(u
);
872 assert(s
->state
== SOCKET_DEAD
);
874 if (s
->deserialized_state
!= s
->state
) {
876 if (s
->deserialized_state
== SOCKET_START_PRE
||
877 s
->deserialized_state
== SOCKET_START_POST
||
878 s
->deserialized_state
== SOCKET_STOP_PRE
||
879 s
->deserialized_state
== SOCKET_STOP_PRE_SIGTERM
||
880 s
->deserialized_state
== SOCKET_STOP_PRE_SIGKILL
||
881 s
->deserialized_state
== SOCKET_STOP_POST
||
882 s
->deserialized_state
== SOCKET_FINAL_SIGTERM
||
883 s
->deserialized_state
== SOCKET_FINAL_SIGKILL
) {
885 if (s
->control_pid
<= 0)
888 if ((r
= unit_watch_pid(UNIT(s
), s
->control_pid
)) < 0)
891 if ((r
= unit_watch_timer(UNIT(s
), s
->timeout_usec
, &s
->timer_watch
)) < 0)
895 if (s
->deserialized_state
== SOCKET_START_POST
||
896 s
->deserialized_state
== SOCKET_LISTENING
||
897 s
->deserialized_state
== SOCKET_RUNNING
||
898 s
->deserialized_state
== SOCKET_STOP_PRE
||
899 s
->deserialized_state
== SOCKET_STOP_PRE_SIGTERM
||
900 s
->deserialized_state
== SOCKET_STOP_PRE_SIGKILL
)
901 if ((r
= socket_open_fds(s
)) < 0)
904 if (s
->deserialized_state
== SOCKET_LISTENING
)
905 if ((r
= socket_watch_fds(s
)) < 0)
908 socket_set_state(s
, s
->deserialized_state
);
914 static int socket_spawn(Socket
*s
, ExecCommand
*c
, pid_t
*_pid
) {
923 if ((r
= unit_watch_timer(UNIT(s
), s
->timeout_usec
, &s
->timer_watch
)) < 0)
926 if (!(argv
= unit_full_printf_strv(UNIT(s
), c
->argv
))) {
935 s
->meta
.manager
->environment
,
939 s
->meta
.manager
->confirm_spawn
,
940 s
->meta
.cgroup_bondings
,
947 if ((r
= unit_watch_pid(UNIT(s
), pid
)) < 0)
948 /* FIXME: we need to do something here */
956 unit_unwatch_timer(UNIT(s
), &s
->timer_watch
);
961 static void socket_enter_dead(Socket
*s
, bool success
) {
967 socket_set_state(s
, s
->failure
? SOCKET_FAILED
: SOCKET_DEAD
);
970 static void socket_enter_signal(Socket
*s
, SocketState state
, bool success
);
972 static void socket_enter_stop_post(Socket
*s
, bool success
) {
979 socket_unwatch_control_pid(s
);
981 s
->control_command_id
= SOCKET_EXEC_STOP_POST
;
983 if ((s
->control_command
= s
->exec_command
[SOCKET_EXEC_STOP_POST
])) {
984 if ((r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
)) < 0)
987 socket_set_state(s
, SOCKET_STOP_POST
);
989 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, true);
994 log_warning("%s failed to run 'stop-post' task: %s", s
->meta
.id
, strerror(-r
));
995 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, false);
998 static void socket_enter_signal(Socket
*s
, SocketState state
, bool success
) {
1000 Set
*pid_set
= NULL
;
1001 bool wait_for_exit
= false;
1008 if (s
->exec_context
.kill_mode
!= KILL_NONE
) {
1009 int sig
= (state
== SOCKET_STOP_PRE_SIGTERM
|| state
== SOCKET_FINAL_SIGTERM
) ? s
->exec_context
.kill_signal
: SIGKILL
;
1011 if (s
->control_pid
> 0) {
1012 if (kill(s
->exec_context
.kill_mode
== KILL_PROCESS_GROUP
?
1014 s
->control_pid
, sig
) < 0 && errno
!= ESRCH
)
1016 log_warning("Failed to kill control process %li: %m", (long) s
->control_pid
);
1018 wait_for_exit
= true;
1021 if (s
->exec_context
.kill_mode
== KILL_CONTROL_GROUP
) {
1023 if (!(pid_set
= set_new(trivial_hash_func
, trivial_compare_func
))) {
1028 /* Exclude the control pid from being killed via the cgroup */
1029 if (s
->control_pid
> 0)
1030 if ((r
= set_put(pid_set
, LONG_TO_PTR(s
->control_pid
))) < 0)
1033 if ((r
= cgroup_bonding_kill_list(s
->meta
.cgroup_bondings
, sig
, pid_set
)) < 0) {
1034 if (r
!= -EAGAIN
&& r
!= -ESRCH
&& r
!= -ENOENT
)
1035 log_warning("Failed to kill control group: %s", strerror(-r
));
1037 wait_for_exit
= true;
1043 if (wait_for_exit
) {
1044 if ((r
= unit_watch_timer(UNIT(s
), s
->timeout_usec
, &s
->timer_watch
)) < 0)
1047 socket_set_state(s
, state
);
1048 } else if (state
== SOCKET_STOP_PRE_SIGTERM
|| state
== SOCKET_STOP_PRE_SIGKILL
)
1049 socket_enter_stop_post(s
, true);
1051 socket_enter_dead(s
, true);
1056 log_warning("%s failed to kill processes: %s", s
->meta
.id
, strerror(-r
));
1058 if (state
== SOCKET_STOP_PRE_SIGTERM
|| state
== SOCKET_STOP_PRE_SIGKILL
)
1059 socket_enter_stop_post(s
, false);
1061 socket_enter_dead(s
, false);
1067 static void socket_enter_stop_pre(Socket
*s
, bool success
) {
1074 socket_unwatch_control_pid(s
);
1076 s
->control_command_id
= SOCKET_EXEC_STOP_PRE
;
1078 if ((s
->control_command
= s
->exec_command
[SOCKET_EXEC_STOP_PRE
])) {
1079 if ((r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
)) < 0)
1082 socket_set_state(s
, SOCKET_STOP_PRE
);
1084 socket_enter_stop_post(s
, true);
1089 log_warning("%s failed to run 'stop-pre' task: %s", s
->meta
.id
, strerror(-r
));
1090 socket_enter_stop_post(s
, false);
1093 static void socket_enter_listening(Socket
*s
) {
1097 if ((r
= socket_watch_fds(s
)) < 0) {
1098 log_warning("%s failed to watch sockets: %s", s
->meta
.id
, strerror(-r
));
1102 socket_set_state(s
, SOCKET_LISTENING
);
1106 socket_enter_stop_pre(s
, false);
1109 static void socket_enter_start_post(Socket
*s
) {
1113 if ((r
= socket_open_fds(s
)) < 0) {
1114 log_warning("%s failed to listen on sockets: %s", s
->meta
.id
, strerror(-r
));
1118 socket_unwatch_control_pid(s
);
1120 s
->control_command_id
= SOCKET_EXEC_START_POST
;
1122 if ((s
->control_command
= s
->exec_command
[SOCKET_EXEC_START_POST
])) {
1123 if ((r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
)) < 0) {
1124 log_warning("%s failed to run 'start-post' task: %s", s
->meta
.id
, strerror(-r
));
1128 socket_set_state(s
, SOCKET_START_POST
);
1130 socket_enter_listening(s
);
1135 socket_enter_stop_pre(s
, false);
1138 static void socket_enter_start_pre(Socket
*s
) {
1142 socket_unwatch_control_pid(s
);
1144 s
->control_command_id
= SOCKET_EXEC_START_PRE
;
1146 if ((s
->control_command
= s
->exec_command
[SOCKET_EXEC_START_PRE
])) {
1147 if ((r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
)) < 0)
1150 socket_set_state(s
, SOCKET_START_PRE
);
1152 socket_enter_start_post(s
);
1157 log_warning("%s failed to run 'start-pre' task: %s", s
->meta
.id
, strerror(-r
));
1158 socket_enter_dead(s
, false);
1161 static void socket_enter_running(Socket
*s
, int cfd
) {
1166 dbus_error_init(&error
);
1168 /* We don't take connections anymore if we are supposed to
1169 * shut down anyway */
1170 if (s
->meta
.job
&& s
->meta
.job
->type
== JOB_STOP
) {
1172 close_nointr_nofail(cfd
);
1174 /* Flush all sockets by closing and reopening them */
1175 socket_close_fds(s
);
1177 if ((r
= socket_watch_fds(s
)) < 0) {
1178 log_warning("%s failed to watch sockets: %s", s
->meta
.id
, strerror(-r
));
1179 socket_enter_stop_pre(s
, false);
1187 if ((r
= manager_add_job(s
->meta
.manager
, JOB_START
, UNIT(s
->service
), JOB_REPLACE
, true, &error
, NULL
)) < 0)
1190 socket_set_state(s
, SOCKET_RUNNING
);
1192 char *prefix
, *instance
= NULL
, *name
;
1195 if (s
->n_connections
>= s
->max_connections
) {
1196 log_warning("Too many incoming connections (%u)", s
->n_connections
);
1197 close_nointr_nofail(cfd
);
1201 if ((r
= socket_instantiate_service(s
)) < 0)
1204 if ((r
= instance_from_socket(cfd
, s
->n_accepted
, &instance
)) < 0)
1207 if (!(prefix
= unit_name_to_prefix(s
->meta
.id
))) {
1213 name
= unit_name_build(prefix
, instance
, ".service");
1222 if ((r
= unit_add_name(UNIT(s
->service
), name
)) < 0) {
1227 service
= s
->service
;
1231 service
->meta
.no_gc
= false;
1233 unit_choose_id(UNIT(service
), name
);
1236 if ((r
= service_set_socket_fd(service
, cfd
, s
)) < 0)
1240 s
->n_connections
++;
1242 if ((r
= manager_add_job(s
->meta
.manager
, JOB_START
, UNIT(service
), JOB_REPLACE
, true, &error
, NULL
)) < 0)
1245 /* Notify clients about changed counters */
1246 unit_add_to_dbus_queue(UNIT(s
));
1252 log_warning("%s failed to queue socket startup job: %s", s
->meta
.id
, bus_error(&error
, r
));
1253 socket_enter_stop_pre(s
, false);
1256 close_nointr_nofail(cfd
);
1258 dbus_error_free(&error
);
1261 static void socket_run_next(Socket
*s
, bool success
) {
1265 assert(s
->control_command
);
1266 assert(s
->control_command
->command_next
);
1271 socket_unwatch_control_pid(s
);
1273 s
->control_command
= s
->control_command
->command_next
;
1275 if ((r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
)) < 0)
1281 log_warning("%s failed to run next task: %s", s
->meta
.id
, strerror(-r
));
1283 if (s
->state
== SOCKET_START_POST
)
1284 socket_enter_stop_pre(s
, false);
1285 else if (s
->state
== SOCKET_STOP_POST
)
1286 socket_enter_dead(s
, false);
1288 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, false);
1291 static int socket_start(Unit
*u
) {
1292 Socket
*s
= SOCKET(u
);
1296 /* We cannot fulfill this request right now, try again later
1298 if (s
->state
== SOCKET_STOP_PRE
||
1299 s
->state
== SOCKET_STOP_PRE_SIGKILL
||
1300 s
->state
== SOCKET_STOP_PRE_SIGTERM
||
1301 s
->state
== SOCKET_STOP_POST
||
1302 s
->state
== SOCKET_FINAL_SIGTERM
||
1303 s
->state
== SOCKET_FINAL_SIGKILL
)
1306 if (s
->state
== SOCKET_START_PRE
||
1307 s
->state
== SOCKET_START_POST
)
1310 /* Cannot run this without the service being around */
1312 if (s
->service
->meta
.load_state
!= UNIT_LOADED
)
1315 /* If the service is alredy actvie we cannot start the
1317 if (s
->service
->state
!= SERVICE_DEAD
&&
1318 s
->service
->state
!= SERVICE_FAILED
&&
1319 s
->service
->state
!= SERVICE_AUTO_RESTART
)
1323 assert(s
->state
== SOCKET_DEAD
|| s
->state
== SOCKET_FAILED
);
1326 socket_enter_start_pre(s
);
1330 static int socket_stop(Unit
*u
) {
1331 Socket
*s
= SOCKET(u
);
1336 if (s
->state
== SOCKET_STOP_PRE
||
1337 s
->state
== SOCKET_STOP_PRE_SIGTERM
||
1338 s
->state
== SOCKET_STOP_PRE_SIGKILL
||
1339 s
->state
== SOCKET_STOP_POST
||
1340 s
->state
== SOCKET_FINAL_SIGTERM
||
1341 s
->state
== SOCKET_FINAL_SIGKILL
)
1344 /* If there's already something running we go directly into
1346 if (s
->state
== SOCKET_START_PRE
||
1347 s
->state
== SOCKET_START_POST
) {
1348 socket_enter_signal(s
, SOCKET_STOP_PRE_SIGTERM
, true);
1352 assert(s
->state
== SOCKET_LISTENING
|| s
->state
== SOCKET_RUNNING
);
1354 socket_enter_stop_pre(s
, true);
1358 static int socket_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
1359 Socket
*s
= SOCKET(u
);
1367 unit_serialize_item(u
, f
, "state", socket_state_to_string(s
->state
));
1368 unit_serialize_item(u
, f
, "failure", yes_no(s
->failure
));
1369 unit_serialize_item_format(u
, f
, "n-accepted", "%u", s
->n_accepted
);
1371 if (s
->control_pid
> 0)
1372 unit_serialize_item_format(u
, f
, "control-pid", "%lu", (unsigned long) s
->control_pid
);
1374 if (s
->control_command_id
>= 0)
1375 unit_serialize_item(u
, f
, "control-command", socket_exec_command_to_string(s
->control_command_id
));
1377 LIST_FOREACH(port
, p
, s
->ports
) {
1383 if ((copy
= fdset_put_dup(fds
, p
->fd
)) < 0)
1386 if (p
->type
== SOCKET_SOCKET
) {
1389 if ((r
= socket_address_print(&p
->address
, &t
)) < 0)
1392 unit_serialize_item_format(u
, f
, "socket", "%i %i %s", copy
, p
->address
.type
, t
);
1395 assert(p
->type
== SOCKET_FIFO
);
1396 unit_serialize_item_format(u
, f
, "fifo", "%i %s", copy
, p
->path
);
1403 static int socket_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
1404 Socket
*s
= SOCKET(u
);
1411 if (streq(key
, "state")) {
1414 if ((state
= socket_state_from_string(value
)) < 0)
1415 log_debug("Failed to parse state value %s", value
);
1417 s
->deserialized_state
= state
;
1418 } else if (streq(key
, "failure")) {
1421 if ((b
= parse_boolean(value
)) < 0)
1422 log_debug("Failed to parse failure value %s", value
);
1424 s
->failure
= b
|| s
->failure
;
1426 } else if (streq(key
, "n-accepted")) {
1429 if (safe_atou(value
, &k
) < 0)
1430 log_debug("Failed to parse n-accepted value %s", value
);
1433 } else if (streq(key
, "control-pid")) {
1436 if (parse_pid(value
, &pid
) < 0)
1437 log_debug("Failed to parse control-pid value %s", value
);
1439 s
->control_pid
= pid
;
1440 } else if (streq(key
, "control-command")) {
1441 SocketExecCommand id
;
1443 if ((id
= socket_exec_command_from_string(value
)) < 0)
1444 log_debug("Failed to parse exec-command value %s", value
);
1446 s
->control_command_id
= id
;
1447 s
->control_command
= s
->exec_command
[id
];
1449 } else if (streq(key
, "fifo")) {
1453 if (sscanf(value
, "%i %n", &fd
, &skip
) < 1 || fd
< 0 || !fdset_contains(fds
, fd
))
1454 log_debug("Failed to parse fifo value %s", value
);
1457 LIST_FOREACH(port
, p
, s
->ports
)
1458 if (streq(p
->path
, value
+skip
))
1463 close_nointr_nofail(p
->fd
);
1464 p
->fd
= fdset_remove(fds
, fd
);
1468 } else if (streq(key
, "socket")) {
1469 int fd
, type
, skip
= 0;
1472 if (sscanf(value
, "%i %i %n", &fd
, &type
, &skip
) < 2 || fd
< 0 || type
< 0 || !fdset_contains(fds
, fd
))
1473 log_debug("Failed to parse socket value %s", value
);
1476 LIST_FOREACH(port
, p
, s
->ports
)
1477 if (socket_address_is(&p
->address
, value
+skip
, type
))
1482 close_nointr_nofail(p
->fd
);
1483 p
->fd
= fdset_remove(fds
, fd
);
1488 log_debug("Unknown serialization key '%s'", key
);
1493 static UnitActiveState
socket_active_state(Unit
*u
) {
1496 return state_translation_table
[SOCKET(u
)->state
];
1499 static const char *socket_sub_state_to_string(Unit
*u
) {
1502 return socket_state_to_string(SOCKET(u
)->state
);
1505 static bool socket_check_gc(Unit
*u
) {
1506 Socket
*s
= SOCKET(u
);
1510 return s
->n_connections
> 0;
1513 static void socket_fd_event(Unit
*u
, int fd
, uint32_t events
, Watch
*w
) {
1514 Socket
*s
= SOCKET(u
);
1520 if (s
->state
!= SOCKET_LISTENING
)
1523 log_debug("Incoming traffic on %s", u
->meta
.id
);
1525 if (events
!= EPOLLIN
) {
1526 log_error("Got invalid poll event on socket.");
1530 if (w
->socket_accept
) {
1533 if ((cfd
= accept4(fd
, NULL
, NULL
, SOCK_NONBLOCK
)) < 0) {
1538 log_error("Failed to accept socket: %m");
1545 socket_apply_socket_options(s
, cfd
);
1548 socket_enter_running(s
, cfd
);
1552 socket_enter_stop_pre(s
, false);
1555 static void socket_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
1556 Socket
*s
= SOCKET(u
);
1562 if (pid
!= s
->control_pid
)
1567 success
= is_clean_exit(code
, status
);
1569 if (s
->control_command
) {
1570 exec_status_exit(&s
->control_command
->exec_status
, pid
, code
, status
);
1572 if (s
->control_command
->ignore
)
1576 log_full(success
? LOG_DEBUG
: LOG_NOTICE
,
1577 "%s control process exited, code=%s status=%i", u
->meta
.id
, sigchld_code_to_string(code
), status
);
1578 s
->failure
= s
->failure
|| !success
;
1580 if (s
->control_command
&& s
->control_command
->command_next
&& success
) {
1581 log_debug("%s running next command for state %s", u
->meta
.id
, socket_state_to_string(s
->state
));
1582 socket_run_next(s
, success
);
1584 s
->control_command
= NULL
;
1585 s
->control_command_id
= _SOCKET_EXEC_COMMAND_INVALID
;
1587 /* No further commands for this step, so let's figure
1588 * out what to do next */
1590 log_debug("%s got final SIGCHLD for state %s", u
->meta
.id
, socket_state_to_string(s
->state
));
1594 case SOCKET_START_PRE
:
1596 socket_enter_start_post(s
);
1598 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, false);
1601 case SOCKET_START_POST
:
1603 socket_enter_listening(s
);
1605 socket_enter_stop_pre(s
, false);
1608 case SOCKET_STOP_PRE
:
1609 case SOCKET_STOP_PRE_SIGTERM
:
1610 case SOCKET_STOP_PRE_SIGKILL
:
1611 socket_enter_stop_post(s
, success
);
1614 case SOCKET_STOP_POST
:
1615 case SOCKET_FINAL_SIGTERM
:
1616 case SOCKET_FINAL_SIGKILL
:
1617 socket_enter_dead(s
, success
);
1621 assert_not_reached("Uh, control process died at wrong time.");
1625 /* Notify clients about changed exit status */
1626 unit_add_to_dbus_queue(u
);
1629 static void socket_timer_event(Unit
*u
, uint64_t elapsed
, Watch
*w
) {
1630 Socket
*s
= SOCKET(u
);
1633 assert(elapsed
== 1);
1634 assert(w
== &s
->timer_watch
);
1638 case SOCKET_START_PRE
:
1639 log_warning("%s starting timed out. Terminating.", u
->meta
.id
);
1640 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, false);
1642 case SOCKET_START_POST
:
1643 log_warning("%s starting timed out. Stopping.", u
->meta
.id
);
1644 socket_enter_stop_pre(s
, false);
1647 case SOCKET_STOP_PRE
:
1648 log_warning("%s stopping timed out. Terminating.", u
->meta
.id
);
1649 socket_enter_signal(s
, SOCKET_STOP_PRE_SIGTERM
, false);
1652 case SOCKET_STOP_PRE_SIGTERM
:
1653 log_warning("%s stopping timed out. Killing.", u
->meta
.id
);
1654 socket_enter_signal(s
, SOCKET_STOP_PRE_SIGKILL
, false);
1657 case SOCKET_STOP_PRE_SIGKILL
:
1658 log_warning("%s still around after SIGKILL. Ignoring.", u
->meta
.id
);
1659 socket_enter_stop_post(s
, false);
1662 case SOCKET_STOP_POST
:
1663 log_warning("%s stopping timed out (2). Terminating.", u
->meta
.id
);
1664 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, false);
1667 case SOCKET_FINAL_SIGTERM
:
1668 log_warning("%s stopping timed out (2). Killing.", u
->meta
.id
);
1669 socket_enter_signal(s
, SOCKET_FINAL_SIGKILL
, false);
1672 case SOCKET_FINAL_SIGKILL
:
1673 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u
->meta
.id
);
1674 socket_enter_dead(s
, false);
1678 assert_not_reached("Timeout at wrong time.");
1682 int socket_collect_fds(Socket
*s
, int **fds
, unsigned *n_fds
) {
1691 /* Called from the service code for requesting our fds */
1694 LIST_FOREACH(port
, p
, s
->ports
)
1698 if (!(rfds
= new(int, rn_fds
)))
1702 LIST_FOREACH(port
, p
, s
->ports
)
1706 assert(k
== rn_fds
);
1714 void socket_notify_service_dead(Socket
*s
) {
1717 /* The service is dead. Dang!
1719 * This is strictly for one-instance-for-all-connections
1722 if (s
->state
== SOCKET_RUNNING
) {
1723 log_debug("%s got notified about service death.", s
->meta
.id
);
1724 socket_enter_listening(s
);
1728 void socket_connection_unref(Socket
*s
) {
1731 /* The service is dead. Yay!
1733 * This is strictly for one-onstance-per-connection
1736 assert(s
->n_connections
> 0);
1739 log_debug("%s: One connection closed, %u left.", s
->meta
.id
, s
->n_connections
);
1742 static void socket_reset_failed(Unit
*u
) {
1743 Socket
*s
= SOCKET(u
);
1747 if (s
->state
== SOCKET_FAILED
)
1748 socket_set_state(s
, SOCKET_DEAD
);
1753 static const char* const socket_state_table
[_SOCKET_STATE_MAX
] = {
1754 [SOCKET_DEAD
] = "dead",
1755 [SOCKET_START_PRE
] = "start-pre",
1756 [SOCKET_START_POST
] = "start-post",
1757 [SOCKET_LISTENING
] = "listening",
1758 [SOCKET_RUNNING
] = "running",
1759 [SOCKET_STOP_PRE
] = "stop-pre",
1760 [SOCKET_STOP_PRE_SIGTERM
] = "stop-pre-sigterm",
1761 [SOCKET_STOP_PRE_SIGKILL
] = "stop-pre-sigkill",
1762 [SOCKET_STOP_POST
] = "stop-post",
1763 [SOCKET_FINAL_SIGTERM
] = "final-sigterm",
1764 [SOCKET_FINAL_SIGKILL
] = "final-sigkill",
1765 [SOCKET_FAILED
] = "failed"
1768 DEFINE_STRING_TABLE_LOOKUP(socket_state
, SocketState
);
1770 static const char* const socket_exec_command_table
[_SOCKET_EXEC_COMMAND_MAX
] = {
1771 [SOCKET_EXEC_START_PRE
] = "StartPre",
1772 [SOCKET_EXEC_START_POST
] = "StartPost",
1773 [SOCKET_EXEC_STOP_PRE
] = "StopPre",
1774 [SOCKET_EXEC_STOP_POST
] = "StopPost"
1777 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command
, SocketExecCommand
);
1779 const UnitVTable socket_vtable
= {
1780 .suffix
= ".socket",
1782 .init
= socket_init
,
1783 .done
= socket_done
,
1784 .load
= socket_load
,
1786 .coldplug
= socket_coldplug
,
1788 .dump
= socket_dump
,
1790 .start
= socket_start
,
1791 .stop
= socket_stop
,
1793 .serialize
= socket_serialize
,
1794 .deserialize_item
= socket_deserialize_item
,
1796 .active_state
= socket_active_state
,
1797 .sub_state_to_string
= socket_sub_state_to_string
,
1799 .check_gc
= socket_check_gc
,
1801 .fd_event
= socket_fd_event
,
1802 .sigchld_event
= socket_sigchld_event
,
1803 .timer_event
= socket_timer_event
,
1805 .reset_failed
= socket_reset_failed
,
1807 .bus_interface
= "org.freedesktop.systemd1.Socket",
1808 .bus_message_handler
= bus_socket_message_handler
,
1809 .bus_invalidating_properties
= bus_socket_invalidating_properties