+++ /dev/null
-/*-*- 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 <http://www.gnu.org/licenses/>.
-***/
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <sys/epoll.h>
-#include <signal.h>
-#include <arpa/inet.h>
-
-#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,
- [SOCKET_START_PRE] = UNIT_ACTIVATING,
- [SOCKET_START_POST] = UNIT_ACTIVATING,
- [SOCKET_LISTENING] = UNIT_ACTIVE,
- [SOCKET_RUNNING] = UNIT_ACTIVE,
- [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
- [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
- [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
- [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
- [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
- [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
- [SOCKET_MAINTAINANCE] = UNIT_INACTIVE,
-};
-
-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);
- SocketPort *p;
-
- assert(s);
-
- while ((p = s->ports)) {
- LIST_REMOVE(SocketPort, port, s->ports, p);
-
- 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_COMMAND_MAX);
- s->control_command = NULL;
-
- 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 bool have_non_accept_socket(Socket *s) {
- SocketPort *p;
-
- assert(s);
-
- if (!s->accept)
- return true;
-
- LIST_FOREACH(port, p, s->ports) {
-
- if (p->type != SOCKET_SOCKET)
- return true;
-
- if (!socket_address_can_accept(&p->address))
- return true;
- }
-
- return false;
-}
-
-static int socket_verify(Socket *s) {
- assert(s);
-
- 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;
-}
-
-static bool socket_needs_mount(Socket *s, const char *prefix) {
- SocketPort *p;
-
- assert(s);
-
- LIST_FOREACH(port, p, s->ports) {
-
- if (p->type == SOCKET_SOCKET) {
- if (socket_address_needs_mount(&p->address, prefix))
- return true;
- } else {
- assert(p->type == SOCKET_FIFO);
- if (path_startswith(p->path, prefix))
- return true;
- }
- }
-
- return false;
-}
-
-int socket_add_one_mount_link(Socket *s, Mount *m) {
- int r;
-
- assert(s);
- assert(m);
-
- if (s->meta.load_state != UNIT_LOADED ||
- m->meta.load_state != UNIT_LOADED)
- return 0;
-
- if (!socket_needs_mount(s, m->where))
- return 0;
-
- if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(s), true)) < 0)
- return r;
-
- if ((r = unit_add_dependency(UNIT(s), UNIT_REQUIRES, UNIT(m), true)) < 0)
- return r;
-
- return 0;
-}
-
-static int socket_add_mount_links(Socket *s) {
- Meta *other;
- int r;
-
- assert(s);
-
- LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
- if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
- return r;
-
- return 0;
-}
-
-static int socket_add_device_link(Socket *s) {
- char *t;
- int r;
-
- assert(s);
-
- if (!s->bind_to_device)
- return 0;
-
- if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
- return -ENOMEM;
-
- r = unit_add_node_link(UNIT(s), t, false);
- free(t);
-
- 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 = socket_add_mount_links(s)) < 0)
- return r;
-
- if ((r = socket_add_device_link(s)) < 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) {
-
- if (type == SOCK_STREAM)
- return "ListenStream";
- else if (type == SOCK_DGRAM)
- return "ListenDatagram";
- else if (type == SOCK_SEQPACKET)
- return "ListenSequentialPacket";
-
- assert_not_reached("Unknown socket type");
- return NULL;
-}
-
-static void socket_dump(Unit *u, FILE *f, const char *prefix) {
-
- SocketExecCommand c;
- Socket *s = SOCKET(u);
- SocketPort *p;
- const char *prefix2;
- char *p2;
-
- assert(s);
- assert(f);
-
- p2 = strappend(prefix, "\t");
- prefix2 = p2 ? p2 : prefix;
-
- fprintf(f,
- "%sSocket State: %s\n"
- "%sBindIPv6Only: %s\n"
- "%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, 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) {
- const char *t;
- int r;
- char *k;
-
- if ((r = socket_address_print(&p->address, &k)) < 0)
- t = strerror(-r);
- else
- t = k;
-
- fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
- free(k);
- } else
- fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
- }
-
- exec_context_dump(&s->exec_context, f, prefix);
-
- for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
- if (!s->exec_command[c])
- continue;
-
- fprintf(f, "%s-> %s:\n",
- prefix, socket_exec_command_to_string(c));
-
- exec_command_dump_list(s->exec_command[c], f, 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) {
- SocketPort *p;
-
- assert(s);
-
- LIST_FOREACH(port, p, s->ports) {
- if (p->fd < 0)
- continue;
-
- unit_unwatch_fd(UNIT(s), &p->fd_watch);
- 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;
- }
-}
-
-static int socket_open_fds(Socket *s) {
- SocketPort *p;
- int r;
-
- assert(s);
-
- LIST_FOREACH(port, p, s->ports) {
-
- if (p->fd >= 0)
- continue;
-
- if (p->type == SOCKET_SOCKET) {
-
- 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);
-
- mkdir_parents(p->path, s->directory_mode);
-
- if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
- r = -errno;
- goto rollback;
- }
-
- if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
- r = -errno;
- goto rollback;
- }
-
- if (fstat(p->fd, &st) < 0) {
- r = -errno;
- goto rollback;
- }
-
- /* FIXME verify user, access mode */
-
- if (!S_ISFIFO(st.st_mode)) {
- r = -EEXIST;
- goto rollback;
- }
- }
- }
-
- return 0;
-
-rollback:
- socket_close_fds(s);
- return r;
-}
-
-static void socket_unwatch_fds(Socket *s) {
- SocketPort *p;
-
- assert(s);
-
- LIST_FOREACH(port, p, s->ports) {
- if (p->fd < 0)
- continue;
-
- unit_unwatch_fd(UNIT(s), &p->fd_watch);
- }
-}
-
-static int socket_watch_fds(Socket *s) {
- SocketPort *p;
- int r;
-
- assert(s);
-
- LIST_FOREACH(port, p, s->ports) {
- 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;
- }
-
- return 0;
-
-fail:
- socket_unwatch_fds(s);
- return r;
-}
-
-static void socket_set_state(Socket *s, SocketState state) {
- SocketState old_state;
- assert(s);
-
- old_state = s->state;
- s->state = state;
-
- 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_FINAL_SIGTERM &&
- state != SOCKET_FINAL_SIGKILL) {
- unit_unwatch_timer(UNIT(s), &s->timer_watch);
- 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 &&
- state != SOCKET_RUNNING &&
- state != SOCKET_STOP_PRE &&
- state != SOCKET_STOP_PRE_SIGTERM &&
- state != SOCKET_STOP_PRE_SIGKILL)
- socket_close_fds(s);
-
- 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_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 ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
- goto fail;
-
- if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
- r = -ENOMEM;
- goto fail;
- }
-
- r = exec_spawn(c,
- argv,
- &s->exec_context,
- NULL, 0,
- s->meta.manager->environment,
- 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)
- /* FIXME: we need to do something here */
- goto fail;
-
- *_pid = pid;
-
- return 0;
-
-fail:
- unit_unwatch_timer(UNIT(s), &s->timer_watch);
-
- return r;
-}
-
-static void socket_enter_dead(Socket *s, bool success) {
- assert(s);
-
- if (!success)
- s->failure = true;
-
- 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);
-
- if (!success)
- s->failure = true;
-
- socket_unwatch_control_pid(s);
-
- s->control_command_id = SOCKET_EXEC_STOP_POST;
-
- 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", 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->kill_mode != KILL_NONE) {
- int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
-
- if (s->kill_mode == KILL_CONTROL_GROUP) {
-
- 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;
- }
- }
-
- if (sent && s->control_pid > 0) {
- if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
- goto fail;
-
- 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", s->meta.id, strerror(-r));
-
- if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
- socket_enter_stop_post(s, false);
- else
- socket_enter_dead(s, false);
-}
-
-static void socket_enter_stop_pre(Socket *s, bool success) {
- int r;
- assert(s);
-
- if (!success)
- s->failure = true;
-
- socket_unwatch_control_pid(s);
-
- s->control_command_id = SOCKET_EXEC_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;
-
- 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", s->meta.id, strerror(-r));
- socket_enter_stop_post(s, false);
-}
-
-static void socket_enter_listening(Socket *s) {
- int r;
- assert(s);
-
- if ((r = socket_watch_fds(s)) < 0) {
- log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
- goto fail;
- }
-
- socket_set_state(s, SOCKET_LISTENING);
- return;
-
-fail:
- socket_enter_stop_pre(s, false);
-}
-
-static void socket_enter_start_post(Socket *s) {
- int r;
- assert(s);
-
- if ((r = socket_open_fds(s)) < 0) {
- log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
- goto fail;
- }
-
- 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);
- } else
- socket_enter_listening(s);
-
- return;
-
-fail:
- socket_enter_stop_pre(s, false);
-}
-
-static void socket_enter_start_pre(Socket *s) {
- int r;
- assert(s);
-
- socket_unwatch_control_pid(s);
-
- s->control_command_id = SOCKET_EXEC_START_PRE;
-
- 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", s->meta.id, strerror(-r));
- socket_enter_dead(s, false);
-}
-
-static void socket_enter_running(Socket *s, int cfd) {
- int r;
-
- assert(s);
-
- 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;
- }
-
- return;
-
-fail:
- 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) {
- int r;
-
- assert(s);
- assert(s->control_command);
- assert(s->control_command->command_next);
-
- 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, &s->control_pid)) < 0)
- goto fail;
-
- return;
-
-fail:
- 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_signal(s, SOCKET_FINAL_SIGTERM, false);
-}
-
-static int socket_start(Unit *u) {
- Socket *s = SOCKET(u);
-
- assert(s);
-
- /* We cannot fulfill this request right now, try again later
- * please! */
- if (s->state == SOCKET_STOP_PRE ||
- s->state == SOCKET_STOP_PRE_SIGKILL ||
- s->state == SOCKET_STOP_PRE_SIGTERM ||
- s->state == SOCKET_STOP_POST ||
- s->state == SOCKET_FINAL_SIGTERM ||
- s->state == SOCKET_FINAL_SIGKILL)
- return -EAGAIN;
-
- if (s->state == SOCKET_START_PRE ||
- s->state == SOCKET_START_POST)
- return 0;
-
- /* Cannot run this without the service being around */
- 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);
-
- s->failure = false;
- socket_enter_start_pre(s);
- return 0;
-}
-
-static int socket_stop(Unit *u) {
- Socket *s = SOCKET(u);
-
- assert(s);
-
- /* We cannot fulfill this request right now, try again later
- * please! */
- if (s->state == SOCKET_START_PRE ||
- 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", u->meta.id);
-
- if (events != EPOLLIN) {
- log_error("Got invalid poll event on socket.");
- goto fail;
- }
-
- if (w->socket_accept) {
- for (;;) {
-
- 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) {
- Socket *s = SOCKET(u);
- bool success;
-
- assert(s);
- assert(pid >= 0);
-
- success = is_clean_exit(code, status);
- s->failure = s->failure || !success;
-
- assert(s->control_pid == pid);
- s->control_pid = 0;
-
- 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 && 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", u->meta.id, socket_state_to_string(s->state));
-
- switch (s->state) {
-
- case SOCKET_START_PRE:
- if (success)
- socket_enter_start_post(s);
- else
- socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
- break;
-
- case SOCKET_START_POST:
- if (success)
- socket_enter_listening(s);
- else
- socket_enter_stop_pre(s, false);
- break;
-
- case SOCKET_STOP_PRE:
- case SOCKET_STOP_PRE_SIGTERM:
- case SOCKET_STOP_PRE_SIGKILL:
- socket_enter_stop_post(s, success);
- break;
-
- case SOCKET_STOP_POST:
- case SOCKET_FINAL_SIGTERM:
- case SOCKET_FINAL_SIGKILL:
- socket_enter_dead(s, success);
- break;
-
- default:
- assert_not_reached("Uh, control process died at wrong time.");
- }
- }
-}
-
-static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
- Socket *s = SOCKET(u);
-
- 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 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.", 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.", 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.", u->meta.id);
- socket_enter_stop_post(s, false);
- break;
-
- case SOCKET_STOP_POST:
- log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
- socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
- break;
-
- 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_FINAL_SIGKILL:
- log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u->meta.id);
- socket_enter_dead(s, false);
- break;
-
- default:
- assert_not_reached("Timeout at wrong time.");
- }
-}
-
-int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
- int *rfds;
- unsigned rn_fds, k;
- SocketPort *p;
-
- assert(s);
- assert(fds);
- assert(n_fds);
-
- /* Called from the service code for requesting our fds */
-
- rn_fds = 0;
- LIST_FOREACH(port, p, s->ports)
- if (p->fd >= 0)
- rn_fds++;
-
- if (!(rfds = new(int, rn_fds)) < 0)
- return -ENOMEM;
-
- k = 0;
- LIST_FOREACH(port, p, s->ports)
- if (p->fd >= 0)
- rfds[k++] = p->fd;
-
- assert(k == rn_fds);
-
- *fds = rfds;
- *n_fds = rn_fds;
-
- return 0;
-}
-
-void socket_notify_service_dead(Socket *s) {
- assert(s);
-
- /* The service is dead. Dang. */
-
- if (s->state == SOCKET_RUNNING) {
- 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,
-
- .bus_message_handler = bus_socket_message_handler
-};
~ianmdlvl / elogind.git / blobdiff