X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=socket.c;h=6d15cfe0e9e3f345f74009803559f803b56fbc5e;hp=3bfdf4148ddf2e3006bfccd53539d2a02f5b47cd;hb=2d02719c2bcf8b5e30228e00eaceae91946c7551;hpb=f94ea366d38fed424200b748cb042ca44f8c8d50
diff --git a/socket.c b/socket.c
index 3bfdf4148..6d15cfe0e 100644
--- a/socket.c
+++ b/socket.c
@@ -1,5 +1,24 @@
/*-*- Mode: C; c-basic-offset: 8 -*-*/
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see .
+***/
+
#include
#include
#include
@@ -7,10 +26,16 @@
#include
#include
#include
+#include
#include "unit.h"
#include "socket.h"
#include "log.h"
+#include "load-dropin.h"
+#include "load-fragment.h"
+#include "strv.h"
+#include "unit-name.h"
+#include "dbus-socket.h"
static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
[SOCKET_DEAD] = UNIT_INACTIVE,
@@ -22,25 +47,37 @@ static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
[SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
[SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
[SOCKET_STOP_POST] = UNIT_DEACTIVATING,
- [SOCKET_STOP_POST_SIGTERM] = UNIT_DEACTIVATING,
- [SOCKET_STOP_POST_SIGKILL] = UNIT_DEACTIVATING,
+ [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
+ [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
[SOCKET_MAINTAINANCE] = UNIT_INACTIVE,
};
-static const char* const state_string_table[_SOCKET_STATE_MAX] = {
- [SOCKET_DEAD] = "dead",
- [SOCKET_START_PRE] = "start-pre",
- [SOCKET_START_POST] = "start-post",
- [SOCKET_LISTENING] = "listening",
- [SOCKET_RUNNING] = "running",
- [SOCKET_STOP_PRE] = "stop-pre",
- [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
- [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
- [SOCKET_STOP_POST] = "stop-post",
- [SOCKET_STOP_POST_SIGTERM] = "stop-post-sigterm",
- [SOCKET_STOP_POST_SIGKILL] = "stop-post-sigkill",
- [SOCKET_MAINTAINANCE] = "maintainance"
-};
+static void socket_init(Unit *u) {
+ Socket *s = SOCKET(u);
+
+ assert(u);
+ assert(u->meta.load_state == UNIT_STUB);
+
+ s->timer_watch.type = WATCH_INVALID;
+ s->backlog = SOMAXCONN;
+ s->timeout_usec = DEFAULT_TIMEOUT_USEC;
+ s->directory_mode = 0755;
+ s->socket_mode = 0666;
+
+ exec_context_init(&s->exec_context);
+
+ s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
+}
+
+static void socket_unwatch_control_pid(Socket *s) {
+ assert(s);
+
+ if (s->control_pid <= 0)
+ return;
+
+ unit_unwatch_pid(UNIT(s), s->control_pid);
+ s->control_pid = 0;
+}
static void socket_done(Unit *u) {
Socket *s = SOCKET(u);
@@ -51,68 +88,92 @@ static void socket_done(Unit *u) {
while ((p = s->ports)) {
LIST_REMOVE(SocketPort, port, s->ports, p);
- if (p->fd >= 0)
- close_nointr(p->fd);
+ if (p->fd >= 0) {
+ unit_unwatch_fd(UNIT(s), &p->fd_watch);
+ close_nointr_nofail(p->fd);
+ }
+
free(p->path);
free(p);
}
exec_context_done(&s->exec_context);
- exec_command_free_array(s->exec_command, _SOCKET_EXEC_MAX);
+ exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
s->control_command = NULL;
- if (s->control_pid > 0) {
- unit_unwatch_pid(u, s->control_pid);
- s->control_pid = 0;
- }
+ socket_unwatch_control_pid(s);
s->service = NULL;
free(s->bind_to_device);
+ s->bind_to_device = NULL;
unit_unwatch_timer(u, &s->timer_watch);
}
-static int socket_init(Unit *u) {
- Socket *s = SOCKET(u);
- char *t;
- int r;
+static bool have_non_accept_socket(Socket *s) {
+ SocketPort *p;
- /* First, reset everything to the defaults, in case this is a
- * reload */
+ assert(s);
- s->state = 0;
- s->timer_watch.type = WATCH_INVALID;
- s->bind_ipv6_only = false;
- s->backlog = SOMAXCONN;
- s->timeout_usec = DEFAULT_TIMEOUT_USEC;
- exec_context_init(&s->exec_context);
+ if (!s->accept)
+ return true;
- if ((r = unit_load_fragment_and_dropin(u)) <= 0) {
- if (r == 0)
- r = -ENOENT;
- goto fail;
- }
+ LIST_FOREACH(port, p, s->ports) {
- if (!(t = unit_name_change_suffix(unit_id(u), ".service"))) {
- r = -ENOMEM;
- goto fail;
+ if (p->type != SOCKET_SOCKET)
+ return true;
+
+ if (!socket_address_can_accept(&p->address))
+ return true;
}
- r = manager_load_unit(u->meta.manager, t, (Unit**) &s->service);
- free(t);
+ return false;
+}
- if (r < 0)
- goto fail;
+static int socket_verify(Socket *s) {
+ assert(s);
- if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service))) < 0)
- goto fail;
+ if (UNIT(s)->meta.load_state != UNIT_LOADED)
+ return 0;
+
+ if (!s->ports) {
+ log_error("%s lacks Listen setting. Refusing.", UNIT(s)->meta.id);
+ return -EINVAL;
+ }
return 0;
+}
-fail:
- socket_done(u);
- return r;
+static int socket_load(Unit *u) {
+ Socket *s = SOCKET(u);
+ int r;
+
+ assert(u);
+ assert(u->meta.load_state == UNIT_STUB);
+
+ if ((r = unit_load_fragment_and_dropin(u)) < 0)
+ return r;
+
+ /* This is a new unit? Then let's add in some extras */
+ if (u->meta.load_state == UNIT_LOADED) {
+
+ if (have_non_accept_socket(s)) {
+ if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)))
+ return r;
+
+ if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
+ return r;
+ }
+
+ if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
+ return r;
+
+ if ((r = unit_add_default_cgroup(u)) < 0)
+ return r;
+ }
+
+ return socket_verify(s);
}
static const char* listen_lookup(int type) {
@@ -130,38 +191,47 @@ static const char* listen_lookup(int type) {
static void socket_dump(Unit *u, FILE *f, const char *prefix) {
- static const char* const command_table[_SOCKET_EXEC_MAX] = {
- [SOCKET_EXEC_START_PRE] = "StartPre",
- [SOCKET_EXEC_START_POST] = "StartPost",
- [SOCKET_EXEC_STOP_PRE] = "StopPre",
- [SOCKET_EXEC_STOP_POST] = "StopPost"
- };
-
SocketExecCommand c;
Socket *s = SOCKET(u);
SocketPort *p;
- char *prefix2;
+ const char *prefix2;
+ char *p2;
assert(s);
assert(f);
- prefix2 = strappend(prefix, "\t");
- if (!prefix2)
- prefix2 = "";
+ p2 = strappend(prefix, "\t");
+ prefix2 = p2 ? p2 : prefix;
fprintf(f,
"%sSocket State: %s\n"
"%sBindIPv6Only: %s\n"
- "%sBacklog: %u\n",
- prefix, state_string_table[s->state],
+ "%sBacklog: %u\n"
+ "%sKillMode: %s\n"
+ "%sSocketMode: %04o\n"
+ "%sDirectoryMode: %04o\n",
+ prefix, socket_state_to_string(s->state),
prefix, yes_no(s->bind_ipv6_only),
- prefix, s->backlog);
+ prefix, s->backlog,
+ prefix, kill_mode_to_string(s->kill_mode),
+ prefix, s->socket_mode,
+ prefix, s->directory_mode);
+
+ if (s->control_pid > 0)
+ fprintf(f,
+ "%sControl PID: %llu\n",
+ prefix, (unsigned long long) s->control_pid);
if (s->bind_to_device)
fprintf(f,
"%sBindToDevice: %s\n",
prefix, s->bind_to_device);
+ if (s->accept)
+ fprintf(f,
+ "%sAccepted: %u\n",
+ prefix, s->n_accepted);
+
LIST_FOREACH(port, p, s->ports) {
if (p->type == SOCKET_SOCKET) {
@@ -182,17 +252,98 @@ static void socket_dump(Unit *u, FILE *f, const char *prefix) {
exec_context_dump(&s->exec_context, f, prefix);
- for (c = 0; c < _SOCKET_EXEC_MAX; c++) {
+ for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
if (!s->exec_command[c])
continue;
- fprintf(f, "%sâ %s:\n",
- prefix, command_table[c]);
+ fprintf(f, "%s-> %s:\n",
+ prefix, socket_exec_command_to_string(c));
exec_command_dump_list(s->exec_command[c], f, prefix2);
}
- free(prefix2);
+ free(p2);
+}
+
+static int instance_from_socket(int fd, unsigned nr, char **instance) {
+ socklen_t l;
+ char *r;
+ union {
+ struct sockaddr sa;
+ struct sockaddr_un un;
+ struct sockaddr_in in;
+ struct sockaddr_in6 in6;
+ struct sockaddr_storage storage;
+ } local, remote;
+
+ assert(fd >= 0);
+ assert(instance);
+
+ l = sizeof(local);
+ if (getsockname(fd, &local.sa, &l) < 0)
+ return -errno;
+
+ l = sizeof(remote);
+ if (getpeername(fd, &remote.sa, &l) < 0)
+ return -errno;
+
+ switch (local.sa.sa_family) {
+
+ case AF_INET: {
+ uint32_t
+ a = ntohl(local.in.sin_addr.s_addr),
+ b = ntohl(remote.in.sin_addr.s_addr);
+
+ if (asprintf(&r,
+ "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
+ nr,
+ a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
+ ntohs(local.in.sin_port),
+ b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
+ ntohs(remote.in.sin_port)) < 0)
+ return -ENOMEM;
+
+ break;
+ }
+
+ case AF_INET6: {
+ char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
+
+ if (asprintf(&r,
+ "%u-%s:%u-%s:%u",
+ nr,
+ inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
+ ntohs(local.in6.sin6_port),
+ inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
+ ntohs(remote.in6.sin6_port)) < 0)
+ return -ENOMEM;
+
+ break;
+ }
+
+ case AF_UNIX: {
+ struct ucred ucred;
+
+ l = sizeof(ucred);
+ if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
+ return -errno;
+
+ if (asprintf(&r,
+ "%u-%llu-%llu",
+ nr,
+ (unsigned long long) ucred.pid,
+ (unsigned long long) ucred.uid) < 0)
+ return -ENOMEM;
+
+ break;
+ }
+
+ default:
+ assert_not_reached("Unhandled socket type.");
+ }
+
+ *instance = r;
+ return 0;
}
static void socket_close_fds(Socket *s) {
@@ -205,7 +356,15 @@ static void socket_close_fds(Socket *s) {
continue;
unit_unwatch_fd(UNIT(s), &p->fd_watch);
- assert_se(close_nointr(p->fd) >= 0);
+ close_nointr_nofail(p->fd);
+
+ /* One little note: we should never delete any sockets
+ * in the file system here! After all some other
+ * process we spawned might still have a reference of
+ * this fd and wants to continue to use it. Therefore
+ * we delete sockets in the file system before we
+ * create a new one, not after we stopped using
+ * one! */
p->fd = -1;
}
@@ -224,14 +383,23 @@ static int socket_open_fds(Socket *s) {
if (p->type == SOCKET_SOCKET) {
- if ((r = socket_address_listen(&p->address, s->backlog, s->bind_ipv6_only, s->bind_to_device, &p->fd)) < 0)
+ if ((r = socket_address_listen(
+ &p->address,
+ s->backlog,
+ s->bind_ipv6_only,
+ s->bind_to_device,
+ s->directory_mode,
+ s->socket_mode,
+ &p->fd)) < 0)
goto rollback;
} else {
struct stat st;
assert(p->type == SOCKET_FIFO);
- if (mkfifo(p->path, 0666 & ~s->exec_context.umask) < 0 && errno != EEXIST) {
+ mkdir_parents(p->path, s->directory_mode);
+
+ if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
r = -errno;
goto rollback;
}
@@ -285,6 +453,11 @@ static int socket_watch_fds(Socket *s) {
if (p->fd < 0)
continue;
+ p->fd_watch.socket_accept =
+ s->accept &&
+ p->type == SOCKET_SOCKET &&
+ socket_address_can_accept(&p->address);
+
if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
goto fail;
}
@@ -309,28 +482,16 @@ static void socket_set_state(Socket *s, SocketState state) {
state != SOCKET_STOP_PRE_SIGTERM &&
state != SOCKET_STOP_PRE_SIGKILL &&
state != SOCKET_STOP_POST &&
- state != SOCKET_STOP_POST_SIGTERM &&
- state != SOCKET_STOP_POST_SIGKILL)
+ state != SOCKET_FINAL_SIGTERM &&
+ state != SOCKET_FINAL_SIGKILL) {
unit_unwatch_timer(UNIT(s), &s->timer_watch);
-
- if (state != SOCKET_START_PRE &&
- state != SOCKET_START_POST &&
- state != SOCKET_STOP_PRE &&
- state != SOCKET_STOP_PRE_SIGTERM &&
- state != SOCKET_STOP_PRE_SIGKILL &&
- state != SOCKET_STOP_POST &&
- state != SOCKET_STOP_POST_SIGTERM &&
- state != SOCKET_STOP_POST_SIGKILL)
- if (s->control_pid > 0) {
- unit_unwatch_pid(UNIT(s), s->control_pid);
- s->control_pid = 0;
- }
-
- if (state != SOCKET_START_PRE &&
- state != SOCKET_START_POST &&
- state != SOCKET_STOP_PRE &&
- state != SOCKET_STOP_POST)
+ socket_unwatch_control_pid(s);
s->control_command = NULL;
+ s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
+ }
+
+ if (state != SOCKET_LISTENING)
+ socket_unwatch_fds(s);
if (state != SOCKET_START_POST &&
state != SOCKET_LISTENING &&
@@ -340,29 +501,91 @@ static void socket_set_state(Socket *s, SocketState state) {
state != SOCKET_STOP_PRE_SIGKILL)
socket_close_fds(s);
- if (state != SOCKET_LISTENING)
- socket_unwatch_fds(s);
-
- log_debug("%s changed %s â %s", unit_id(UNIT(s)), state_string_table[old_state], state_string_table[state]);
+ if (state != old_state)
+ log_debug("%s changed %s -> %s",
+ s->meta.id,
+ socket_state_to_string(old_state),
+ socket_state_to_string(state));
unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
}
-static int socket_spawn(Socket *s, ExecCommand *c, bool timeout, pid_t *_pid) {
+static int socket_coldplug(Unit *u) {
+ Socket *s = SOCKET(u);
+ int r;
+
+ assert(s);
+ assert(s->state == SOCKET_DEAD);
+
+ if (s->deserialized_state != s->state) {
+
+ if (s->deserialized_state == SOCKET_START_PRE ||
+ s->deserialized_state == SOCKET_START_POST ||
+ s->deserialized_state == SOCKET_STOP_PRE ||
+ s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
+ s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
+ s->deserialized_state == SOCKET_STOP_POST ||
+ s->deserialized_state == SOCKET_FINAL_SIGTERM ||
+ s->deserialized_state == SOCKET_FINAL_SIGKILL) {
+
+ if (s->control_pid <= 0)
+ return -EBADMSG;
+
+ if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
+ return r;
+
+ if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
+ return r;
+ }
+
+ if (s->deserialized_state == SOCKET_START_POST ||
+ s->deserialized_state == SOCKET_LISTENING ||
+ s->deserialized_state == SOCKET_RUNNING ||
+ s->deserialized_state == SOCKET_STOP_PRE ||
+ s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
+ s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
+ if ((r = socket_open_fds(s)) < 0)
+ return r;
+
+ if (s->deserialized_state == SOCKET_LISTENING)
+ if ((r = socket_watch_fds(s)) < 0)
+ return r;
+
+ socket_set_state(s, s->deserialized_state);
+ }
+
+ return 0;
+}
+
+static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
pid_t pid;
int r;
+ char **argv;
assert(s);
assert(c);
assert(_pid);
- if (timeout) {
- if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
- goto fail;
- } else
- unit_unwatch_timer(UNIT(s), &s->timer_watch);
+ if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
+ goto fail;
- if ((r = exec_spawn(c, &s->exec_context, NULL, 0, &pid)) < 0)
+ if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ r = exec_spawn(c,
+ argv,
+ &s->exec_context,
+ NULL, 0,
+ true,
+ true,
+ UNIT(s)->meta.manager->confirm_spawn,
+ UNIT(s)->meta.cgroup_bondings,
+ &pid);
+
+ strv_free(argv);
+ if (r < 0)
goto fail;
if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
@@ -374,8 +597,7 @@ static int socket_spawn(Socket *s, ExecCommand *c, bool timeout, pid_t *_pid) {
return 0;
fail:
- if (timeout)
- unit_unwatch_timer(UNIT(s), &s->timer_watch);
+ unit_unwatch_timer(UNIT(s), &s->timer_watch);
return r;
}
@@ -389,6 +611,8 @@ static void socket_enter_dead(Socket *s, bool success) {
socket_set_state(s, s->failure ? SOCKET_MAINTAINANCE : SOCKET_DEAD);
}
+static void socket_enter_signal(Socket *s, SocketState state, bool success);
+
static void socket_enter_stop_post(Socket *s, bool success) {
int r;
assert(s);
@@ -396,50 +620,67 @@ static void socket_enter_stop_post(Socket *s, bool success) {
if (!success)
s->failure = true;
- if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST]))
- if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
- goto fail;
+ socket_unwatch_control_pid(s);
- socket_set_state(s, SOCKET_STOP_POST);
+ s->control_command_id = SOCKET_EXEC_STOP_POST;
- if (!s->control_command)
- socket_enter_dead(s, true);
+ if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
+ if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
+ goto fail;
+
+ socket_set_state(s, SOCKET_STOP_POST);
+ } else
+ socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
return;
fail:
- log_warning("%s failed to run stop-post executable: %s", unit_id(UNIT(s)), strerror(-r));
- socket_enter_dead(s, false);
+ log_warning("%s failed to run stop-post executable: %s", s->meta.id, strerror(-r));
+ socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
}
static void socket_enter_signal(Socket *s, SocketState state, bool success) {
int r;
+ bool sent = false;
assert(s);
if (!success)
s->failure = true;
- if (s->control_pid > 0) {
- int sig;
+ if (s->kill_mode != KILL_NONE) {
+ int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
- sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_POST_SIGTERM) ? SIGTERM : SIGKILL;
+ if (s->kill_mode == KILL_CONTROL_GROUP) {
- if (kill(s->control_pid, sig) < 0 && errno != ESRCH) {
- r = -errno;
- goto fail;
+ if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
+ if (r != -EAGAIN && r != -ESRCH)
+ goto fail;
+ } else
+ sent = true;
}
+
+ if (!sent && s->control_pid > 0)
+ if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
+ r = -errno;
+ goto fail;
+ }
}
- socket_set_state(s, state);
+ if (sent) {
+ if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
+ goto fail;
- if (s->control_pid <= 0)
+ socket_set_state(s, state);
+ } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
+ socket_enter_stop_post(s, true);
+ else
socket_enter_dead(s, true);
return;
fail:
- log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
+ log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
socket_enter_stop_post(s, false);
@@ -454,19 +695,22 @@ static void socket_enter_stop_pre(Socket *s, bool success) {
if (!success)
s->failure = true;
- if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE]))
- if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
- goto fail;
+ socket_unwatch_control_pid(s);
+
+ s->control_command_id = SOCKET_EXEC_STOP_PRE;
- socket_set_state(s, SOCKET_STOP_PRE);
+ if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
+ if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
+ goto fail;
- if (!s->control_command)
+ socket_set_state(s, SOCKET_STOP_PRE);
+ } else
socket_enter_stop_post(s, true);
return;
fail:
- log_warning("%s failed to run stop-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
+ log_warning("%s failed to run stop-pre executable: %s", s->meta.id, strerror(-r));
socket_enter_stop_post(s, false);
}
@@ -475,7 +719,7 @@ static void socket_enter_listening(Socket *s) {
assert(s);
if ((r = socket_watch_fds(s)) < 0) {
- log_warning("%s failed to watch sockets: %s", unit_id(UNIT(s)), strerror(-r));
+ log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
goto fail;
}
@@ -491,19 +735,22 @@ static void socket_enter_start_post(Socket *s) {
assert(s);
if ((r = socket_open_fds(s)) < 0) {
- log_warning("%s failed to listen on sockets: %s", unit_id(UNIT(s)), strerror(-r));
+ log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
goto fail;
}
- if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST]))
- if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) {
- log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
+ socket_unwatch_control_pid(s);
+
+ s->control_command_id = SOCKET_EXEC_START_POST;
+
+ if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
+ if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
+ log_warning("%s failed to run start-post executable: %s", s->meta.id, strerror(-r));
goto fail;
}
- socket_set_state(s, SOCKET_START_POST);
-
- if (!s->control_command)
+ socket_set_state(s, SOCKET_START_POST);
+ } else
socket_enter_listening(s);
return;
@@ -516,36 +763,78 @@ static void socket_enter_start_pre(Socket *s) {
int r;
assert(s);
- if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE]))
- if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
- goto fail;
+ socket_unwatch_control_pid(s);
- socket_set_state(s, SOCKET_START_PRE);
+ s->control_command_id = SOCKET_EXEC_START_PRE;
- if (!s->control_command)
+ if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
+ if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
+ goto fail;
+
+ socket_set_state(s, SOCKET_START_PRE);
+ } else
socket_enter_start_post(s);
return;
fail:
- log_warning("%s failed to run start-pre exectuable: %s", unit_id(UNIT(s)), strerror(-r));
+ log_warning("%s failed to run start-pre exectuable: %s", s->meta.id, strerror(-r));
socket_enter_dead(s, false);
}
-static void socket_enter_running(Socket *s) {
+static void socket_enter_running(Socket *s, int cfd) {
int r;
assert(s);
- if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
- goto fail;
+ if (cfd < 0) {
+ if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
+ goto fail;
+
+ socket_set_state(s, SOCKET_RUNNING);
+ } else {
+ Unit *u;
+ char *prefix, *instance, *name;
+
+ if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)))
+ goto fail;
+
+ if (!(prefix = unit_name_to_prefix(UNIT(s)->meta.id))) {
+ free(instance);
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ name = unit_name_build(prefix, instance, ".service");
+ free(prefix);
+ free(instance);
+
+ if (!name)
+ r = -ENOMEM;
+
+ r = manager_load_unit(UNIT(s)->meta.manager, name, NULL, &u);
+ free(name);
+
+ if (r < 0)
+ goto fail;
+
+ if ((r = service_set_socket_fd(SERVICE(u), cfd) < 0))
+ goto fail;
+
+ cfd = -1;
+
+ if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, NULL)) < 0)
+ goto fail;
+ }
- socket_set_state(s, SOCKET_RUNNING);
return;
fail:
- log_warning("%s failed to queue socket startup job: %s", unit_id(UNIT(s)), strerror(-r));
- socket_enter_dead(s, false);
+ log_warning("%s failed to queue socket startup job: %s", s->meta.id, strerror(-r));
+ socket_enter_stop_pre(s, false);
+
+ if (cfd >= 0)
+ close_nointr_nofail(cfd);
}
static void socket_run_next(Socket *s, bool success) {
@@ -558,20 +847,24 @@ static void socket_run_next(Socket *s, bool success) {
if (!success)
s->failure = true;
+ socket_unwatch_control_pid(s);
+
s->control_command = s->control_command->command_next;
- if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
+ if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
goto fail;
return;
fail:
- if (s->state == SOCKET_STOP_PRE)
- socket_enter_stop_post(s, false);
+ log_warning("%s failed to run spawn next executable: %s", s->meta.id, strerror(-r));
+
+ if (s->state == SOCKET_START_POST)
+ socket_enter_stop_pre(s, false);
else if (s->state == SOCKET_STOP_POST)
socket_enter_dead(s, false);
else
- socket_enter_stop_pre(s, false);
+ socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
}
static int socket_start(Unit *u) {
@@ -585,8 +878,8 @@ static int socket_start(Unit *u) {
s->state == SOCKET_STOP_PRE_SIGKILL ||
s->state == SOCKET_STOP_PRE_SIGTERM ||
s->state == SOCKET_STOP_POST ||
- s->state == SOCKET_STOP_POST_SIGTERM ||
- s->state == SOCKET_STOP_POST_SIGKILL)
+ s->state == SOCKET_FINAL_SIGTERM ||
+ s->state == SOCKET_FINAL_SIGKILL)
return -EAGAIN;
if (s->state == SOCKET_START_PRE ||
@@ -594,8 +887,17 @@ static int socket_start(Unit *u) {
return 0;
/* Cannot run this without the service being around */
- if (s->service->meta.load_state != UNIT_LOADED)
- return -ENOENT;
+ if (s->service) {
+ if (s->service->meta.load_state != UNIT_LOADED)
+ return -ENOENT;
+
+ /* If the service is alredy actvie we cannot start the
+ * socket */
+ if (s->service->state != SERVICE_DEAD &&
+ s->service->state != SERVICE_MAINTAINANCE &&
+ s->service->state != SERVICE_AUTO_RESTART)
+ return -EBUSY;
+ }
assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTAINANCE);
@@ -615,29 +917,204 @@ static int socket_stop(Unit *u) {
s->state == SOCKET_START_POST)
return -EAGAIN;
+ /* Already on it */
+ if (s->state == SOCKET_STOP_PRE ||
+ s->state == SOCKET_STOP_PRE_SIGTERM ||
+ s->state == SOCKET_STOP_PRE_SIGKILL ||
+ s->state == SOCKET_STOP_POST ||
+ s->state == SOCKET_FINAL_SIGTERM ||
+ s->state == SOCKET_FINAL_SIGTERM)
+ return 0;
+
assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
socket_enter_stop_pre(s, true);
return 0;
}
+static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
+ Socket *s = SOCKET(u);
+ SocketPort *p;
+ int r;
+
+ assert(u);
+ assert(f);
+ assert(fds);
+
+ unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
+ unit_serialize_item(u, f, "failure", yes_no(s->failure));
+ unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
+
+ if (s->control_pid > 0)
+ unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) s->control_pid);
+
+ if (s->control_command_id >= 0)
+ unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
+
+ LIST_FOREACH(port, p, s->ports) {
+ int copy;
+
+ if (p->fd < 0)
+ continue;
+
+ if ((copy = fdset_put_dup(fds, p->fd)) < 0)
+ return copy;
+
+ if (p->type == SOCKET_SOCKET) {
+ char *t;
+
+ if ((r = socket_address_print(&p->address, &t)) < 0)
+ return r;
+
+ unit_serialize_item_format(u, f, "socket", "%i %s", copy, t);
+ free(t);
+ } else {
+ assert(p->type == SOCKET_FIFO);
+ unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
+ }
+ }
+
+ return 0;
+}
+
+static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
+ Socket *s = SOCKET(u);
+ int r;
+
+ assert(u);
+ assert(key);
+ assert(value);
+ assert(fds);
+
+ if (streq(key, "state")) {
+ SocketState state;
+
+ if ((state = socket_state_from_string(value)) < 0)
+ log_debug("Failed to parse state value %s", value);
+ else
+ s->deserialized_state = state;
+ } else if (streq(key, "failure")) {
+ int b;
+
+ if ((b = parse_boolean(value)) < 0)
+ log_debug("Failed to parse failure value %s", value);
+ else
+ s->failure = b || s->failure;
+
+ } else if (streq(key, "n-accepted")) {
+ unsigned k;
+
+ if ((r = safe_atou(value, &k)) < 0)
+ log_debug("Failed to parse n-accepted value %s", value);
+ else
+ s->n_accepted += k;
+ } else if (streq(key, "control-pid")) {
+ unsigned pid;
+
+ if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
+ log_debug("Failed to parse control-pid value %s", value);
+ else
+ s->control_pid = (pid_t) pid;
+ } else if (streq(key, "control-command")) {
+ SocketExecCommand id;
+
+ if ((id = socket_exec_command_from_string(value)) < 0)
+ log_debug("Failed to parse exec-command value %s", value);
+ else {
+ s->control_command_id = id;
+ s->control_command = s->exec_command[id];
+ }
+ } else if (streq(key, "fifo")) {
+ int fd, skip = 0;
+ SocketPort *p;
+
+ if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
+ log_debug("Failed to parse fifo value %s", value);
+ else {
+
+ LIST_FOREACH(port, p, s->ports)
+ if (streq(p->path, value+skip))
+ break;
+
+ if (p) {
+ if (p->fd >= 0)
+ close_nointr_nofail(p->fd);
+ p->fd = fdset_remove(fds, fd);
+ }
+ }
+
+ } else if (streq(key, "socket")) {
+ int fd, skip = 0;
+ SocketPort *p;
+
+ if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
+ log_debug("Failed to parse socket value %s", value);
+ else {
+
+ LIST_FOREACH(port, p, s->ports)
+ if (socket_address_is(&p->address, value+skip))
+ break;
+
+ if (p) {
+ if (p->fd >= 0)
+ close_nointr_nofail(p->fd);
+ p->fd = fdset_remove(fds, fd);
+ }
+ }
+
+ } else
+ log_debug("Unknown serialization key '%s'", key);
+
+ return 0;
+}
+
static UnitActiveState socket_active_state(Unit *u) {
assert(u);
return state_translation_table[SOCKET(u)->state];
}
+static const char *socket_sub_state_to_string(Unit *u) {
+ assert(u);
+
+ return socket_state_to_string(SOCKET(u)->state);
+}
+
static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
Socket *s = SOCKET(u);
+ int cfd = -1;
assert(s);
+ assert(fd >= 0);
- log_debug("Incoming traffic on %s", unit_id(u));
+ log_debug("Incoming traffic on %s", u->meta.id);
- if (events != EPOLLIN)
- socket_enter_stop_pre(s, false);
+ if (events != EPOLLIN) {
+ log_error("Got invalid poll event on socket.");
+ goto fail;
+ }
+
+ if (w->socket_accept) {
+ for (;;) {
- socket_enter_running(s);
+ if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
+
+ if (errno == EINTR)
+ continue;
+
+ log_error("Failed to accept socket: %m");
+ goto fail;
+ }
+
+ break;
+ }
+ }
+
+ socket_enter_running(s, cfd);
+ return;
+
+fail:
+ socket_enter_stop_pre(s, false);
}
static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
@@ -651,22 +1128,24 @@ static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
s->failure = s->failure || !success;
assert(s->control_pid == pid);
- assert(s->control_command);
-
- exec_status_fill(&s->control_command->exec_status, pid, code, status);
s->control_pid = 0;
- log_debug("%s control process exited, code=%s status=%i", unit_id(u), sigchld_code(code), status);
+ if (s->control_command)
+ exec_status_fill(&s->control_command->exec_status, pid, code, status);
+
+ log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
- if (s->control_command->command_next &&
- (success || (s->state == SOCKET_EXEC_STOP_PRE || s->state == SOCKET_EXEC_STOP_POST))) {
- log_debug("%s running next command for the state %s", unit_id(u), state_string_table[s->state]);
+ if (s->control_command && s->control_command->command_next && success) {
+ log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
socket_run_next(s, success);
} else {
+ s->control_command = NULL;
+ s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
+
/* No further commands for this step, so let's figure
* out what to do next */
- log_debug("%s got final SIGCHLD for state %s", unit_id(u), state_string_table[s->state]);
+ log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
switch (s->state) {
@@ -674,7 +1153,7 @@ static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
if (success)
socket_enter_start_post(s);
else
- socket_enter_stop_pre(s, false);
+ socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
break;
case SOCKET_START_POST:
@@ -691,8 +1170,8 @@ static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
break;
case SOCKET_STOP_POST:
- case SOCKET_STOP_POST_SIGTERM:
- case SOCKET_STOP_POST_SIGKILL:
+ case SOCKET_FINAL_SIGTERM:
+ case SOCKET_FINAL_SIGKILL:
socket_enter_dead(s, success);
break;
@@ -707,44 +1186,46 @@ static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
assert(s);
assert(elapsed == 1);
-
assert(w == &s->timer_watch);
switch (s->state) {
case SOCKET_START_PRE:
+ log_warning("%s starting timed out. Terminating.", u->meta.id);
+ socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
+
case SOCKET_START_POST:
- log_warning("%s operation timed out. Stopping.", unit_id(u));
+ log_warning("%s starting timed out. Stopping.", u->meta.id);
socket_enter_stop_pre(s, false);
break;
case SOCKET_STOP_PRE:
- log_warning("%s stopping timed out. Terminating.", unit_id(u));
+ log_warning("%s stopping timed out. Terminating.", u->meta.id);
socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
break;
case SOCKET_STOP_PRE_SIGTERM:
- log_warning("%s stopping timed out. Killing.", unit_id(u));
+ log_warning("%s stopping timed out. Killing.", u->meta.id);
socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
break;
case SOCKET_STOP_PRE_SIGKILL:
- log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
+ log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
socket_enter_stop_post(s, false);
break;
case SOCKET_STOP_POST:
- log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
- socket_enter_signal(s, SOCKET_STOP_POST_SIGTERM, false);
+ log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
+ socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
break;
- case SOCKET_STOP_POST_SIGTERM:
- log_warning("%s stopping timed out (2). Killing.", unit_id(u));
- socket_enter_signal(s, SOCKET_STOP_POST_SIGKILL, false);
+ case SOCKET_FINAL_SIGTERM:
+ log_warning("%s stopping timed out (2). Killing.", u->meta.id);
+ socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
break;
- case SOCKET_STOP_POST_SIGKILL:
- log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
+ case SOCKET_FINAL_SIGKILL:
+ log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u->meta.id);
socket_enter_dead(s, false);
break;
@@ -791,25 +1272,60 @@ void socket_notify_service_dead(Socket *s) {
/* The service is dead. Dang. */
if (s->state == SOCKET_RUNNING) {
- log_debug("%s got notified about service death.", unit_id(UNIT(s)));
+ log_debug("%s got notified about service death.", s->meta.id);
socket_enter_listening(s);
}
}
+static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
+ [SOCKET_DEAD] = "dead",
+ [SOCKET_START_PRE] = "start-pre",
+ [SOCKET_START_POST] = "start-post",
+ [SOCKET_LISTENING] = "listening",
+ [SOCKET_RUNNING] = "running",
+ [SOCKET_STOP_PRE] = "stop-pre",
+ [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
+ [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
+ [SOCKET_STOP_POST] = "stop-post",
+ [SOCKET_FINAL_SIGTERM] = "final-sigterm",
+ [SOCKET_FINAL_SIGKILL] = "final-sigkill",
+ [SOCKET_MAINTAINANCE] = "maintainance"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
+
+static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
+ [SOCKET_EXEC_START_PRE] = "StartPre",
+ [SOCKET_EXEC_START_POST] = "StartPost",
+ [SOCKET_EXEC_STOP_PRE] = "StopPre",
+ [SOCKET_EXEC_STOP_POST] = "StopPost"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
+
const UnitVTable socket_vtable = {
.suffix = ".socket",
.init = socket_init,
.done = socket_done,
+ .load = socket_load,
+
+ .coldplug = socket_coldplug,
.dump = socket_dump,
.start = socket_start,
.stop = socket_stop,
+ .serialize = socket_serialize,
+ .deserialize_item = socket_deserialize_item,
+
.active_state = socket_active_state,
+ .sub_state_to_string = socket_sub_state_to_string,
.fd_event = socket_fd_event,
.sigchld_event = socket_sigchld_event,
- .timer_event = socket_timer_event
+ .timer_event = socket_timer_event,
+
+ .bus_message_handler = bus_socket_message_handler
};