Пример #1
0
static int automount_coldplug(Unit *u) {
        Automount *a = AUTOMOUNT(u);
        int r;

        assert(a);
        assert(a->state == AUTOMOUNT_DEAD);

        if (a->deserialized_state != a->state) {

                r = open_dev_autofs(u->manager);
                if (r < 0)
                        return r;

                if (a->deserialized_state == AUTOMOUNT_WAITING ||
                    a->deserialized_state == AUTOMOUNT_RUNNING) {
                        assert(a->pipe_fd >= 0);

                        r = sd_event_add_io(u->manager->event, &a->pipe_event_source, a->pipe_fd, EPOLLIN, automount_dispatch_io, u);
                        if (r < 0)
                                return r;

                        (void) sd_event_source_set_description(a->pipe_event_source, "automount-io");
                        if (a->deserialized_state == AUTOMOUNT_RUNNING) {
                                r = automount_start_expire(a);
                                if (r < 0)
                                        log_unit_warning_errno(UNIT(a), r, "Failed to start expiration timer, ignoring: %m");
                        }
                }

                automount_set_state(a, a->deserialized_state);
        }

        return 0;
}
Пример #2
0
static int scope_start(Unit *u) {
        Scope *s = SCOPE(u);
        int r;

        assert(s);

        if (s->state == SCOPE_FAILED)
                return -EPERM;

        /* We can't fulfill this right now, please try again later */
        if (s->state == SCOPE_STOP_SIGTERM ||
            s->state == SCOPE_STOP_SIGKILL)
                return -EAGAIN;

        assert(s->state == SCOPE_DEAD);

        if (!u->transient && UNIT(s)->manager->n_reloading <= 0)
                return -ENOENT;

        (void) unit_realize_cgroup(u);
        (void) unit_reset_cpu_usage(u);

        r = unit_attach_pids_to_cgroup(u);
        if (r < 0) {
                log_unit_warning_errno(UNIT(s), r, "Failed to add PIDs to scope's control group: %m");
                scope_enter_dead(s, SCOPE_FAILURE_RESOURCES);
                return r;
        }

        s->result = SCOPE_SUCCESS;

        scope_set_state(s, SCOPE_RUNNING);
        return 1;
}
Пример #3
0
static int busname_watch_fd(BusName *n) {
        int r;

        assert(n);

        if (n->starter_fd < 0)
                return 0;

        if (n->starter_event_source) {
                r = sd_event_source_set_enabled(n->starter_event_source, SD_EVENT_ON);
                if (r < 0)
                        goto fail;
        } else {
                r = sd_event_add_io(UNIT(n)->manager->event, &n->starter_event_source, n->starter_fd, EPOLLIN, busname_dispatch_io, n);
                if (r < 0)
                        goto fail;

                (void) sd_event_source_set_description(n->starter_event_source, "busname-starter");
        }

        return 0;

fail:
        log_unit_warning_errno(UNIT(n), r, "Failed to watch starter fd: %m");
        busname_unwatch_fd(n);
        return r;
}
Пример #4
0
static void automount_enter_running(Automount *a) {
        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
        Unit *trigger;
        struct stat st;
        int r;

        assert(a);

        /* If the user masked our unit in the meantime, fail */
        if (UNIT(a)->load_state != UNIT_LOADED) {
                log_unit_error(UNIT(a), "Suppressing automount event since unit is no longer loaded.");
                goto fail;
        }

        /* We don't take mount requests anymore if we are supposed to
         * shut down anyway */
        if (unit_stop_pending(UNIT(a))) {
                log_unit_debug(UNIT(a), "Suppressing automount request since unit stop is scheduled.");
                automount_send_ready(a, a->tokens, -EHOSTDOWN);
                automount_send_ready(a, a->expire_tokens, -EHOSTDOWN);
                return;
        }

        mkdir_p_label(a->where, a->directory_mode);

        /* Before we do anything, let's see if somebody is playing games with us? */
        if (lstat(a->where, &st) < 0) {
                log_unit_warning_errno(UNIT(a), errno, "Failed to stat automount point: %m");
                goto fail;
        }

        /* The mount unit may have been explicitly started before we got the
         * autofs request. Ack it to unblock anything waiting on the mount point. */
        if (!S_ISDIR(st.st_mode) || st.st_dev != a->dev_id) {
                log_unit_info(UNIT(a), "Automount point already active?");
                automount_send_ready(a, a->tokens, 0);
                return;
        }

        trigger = UNIT_TRIGGER(UNIT(a));
        if (!trigger) {
                log_unit_error(UNIT(a), "Unit to trigger vanished.");
                goto fail;
        }

        r = manager_add_job(UNIT(a)->manager, JOB_START, trigger, JOB_REPLACE, &error, NULL);
        if (r < 0) {
                log_unit_warning(UNIT(a), "Failed to queue mount startup job: %s", bus_error_message(&error, r));
                goto fail;
        }

        automount_set_state(a, AUTOMOUNT_RUNNING);
        return;

fail:
        automount_enter_dead(a, AUTOMOUNT_FAILURE_RESOURCES);
}
Пример #5
0
static void scope_enter_signal(Scope *s, ScopeState state, ScopeResult f) {
        bool skip_signal = false;
        int r;

        assert(s);

        if (s->result == SCOPE_SUCCESS)
                s->result = f;

        /* Before sending any signal, make sure we track all members of this cgroup */
        (void) unit_watch_all_pids(UNIT(s));

        /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
         * died now */
        (void) unit_enqueue_rewatch_pids(UNIT(s));

        /* If we have a controller set let's ask the controller nicely to terminate the scope, instead of us going
         * directly into SIGTERM berserk mode */
        if (state == SCOPE_STOP_SIGTERM)
                skip_signal = bus_scope_send_request_stop(s) > 0;

        if (skip_signal)
                r = 1; /* wait */
        else {
                r = unit_kill_context(
                                UNIT(s),
                                &s->kill_context,
                                state != SCOPE_STOP_SIGTERM ? KILL_KILL :
                                s->was_abandoned            ? KILL_TERMINATE_AND_LOG :
                                                              KILL_TERMINATE,
                                -1, -1, false);
                if (r < 0)
                        goto fail;
        }

        if (r > 0) {
                r = scope_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
                if (r < 0)
                        goto fail;

                scope_set_state(s, state);
        } else if (state == SCOPE_STOP_SIGTERM)
                scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_SUCCESS);
        else
                scope_enter_dead(s, SCOPE_SUCCESS);

        return;

fail:
        log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");

        scope_enter_dead(s, SCOPE_FAILURE_RESOURCES);
}
static void busname_enter_making(BusName *n) {
        int r;

        assert(n);

        r = busname_open_fd(n);
        if (r < 0)
                goto fail;

        if (n->policy) {
                /* If there is a policy, we need to resolve user/group
                 * names, which we can't do from PID1, hence let's
                 * fork. */
                busname_unwatch_control_pid(n);

                r = busname_make_starter(n, &n->control_pid);
                if (r < 0) {
                        log_unit_warning_errno(UNIT(n)->id, r, "%s failed to fork 'making' task: %m", UNIT(n)->id);
                        goto fail;
                }

                busname_set_state(n, BUSNAME_MAKING);
        } else {
                /* If there is no policy, we can do everything
                 * directly from PID 1, hence do so. */

                r = bus_kernel_make_starter(n->starter_fd, n->name, n->activating, n->accept_fd, NULL, n->policy_world);
                if (r < 0) {
                        log_unit_warning_errno(UNIT(n)->id, r, "%s failed to make starter: %m", UNIT(n)->id);
                        goto fail;
                }

                busname_enter_listening(n);
        }

        return;

fail:
        busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES);
}
static void busname_enter_signal(BusName *n, BusNameState state, BusNameResult f) {
        KillContext kill_context = {};
        int r;

        assert(n);

        if (f != BUSNAME_SUCCESS)
                n->result = f;

        kill_context_init(&kill_context);

        r = unit_kill_context(UNIT(n),
                              &kill_context,
                              state != BUSNAME_SIGTERM ? KILL_KILL : KILL_TERMINATE,
                              -1,
                              n->control_pid,
                              false);
        if (r < 0) {
                log_unit_warning_errno(UNIT(n)->id, r, "%s failed to kill control process: %m", UNIT(n)->id);
                goto fail;
        }

        if (r > 0) {
                r = busname_arm_timer(n);
                if (r < 0) {
                        log_unit_warning_errno(UNIT(n)->id, r, "%s failed to arm timer: %m", UNIT(n)->id);
                        goto fail;
                }

                busname_set_state(n, state);
        } else if (state == BUSNAME_SIGTERM)
                busname_enter_signal(n, BUSNAME_SIGKILL, BUSNAME_SUCCESS);
        else
                busname_enter_dead(n, BUSNAME_SUCCESS);

        return;

fail:
        busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES);
}
Пример #8
0
int automount_update_mount(Automount *a, MountState old_state, MountState state) {
        int r;

        assert(a);

        switch (state) {
        case MOUNT_MOUNTED:
        case MOUNT_REMOUNTING:
                automount_send_ready(a, a->tokens, 0);
                r = automount_start_expire(a);
                if (r < 0)
                        log_unit_warning_errno(UNIT(a), r, "Failed to start expiration timer, ignoring: %m");
                break;
         case MOUNT_DEAD:
         case MOUNT_UNMOUNTING:
         case MOUNT_MOUNTING_SIGTERM:
         case MOUNT_MOUNTING_SIGKILL:
         case MOUNT_REMOUNTING_SIGTERM:
         case MOUNT_REMOUNTING_SIGKILL:
         case MOUNT_UNMOUNTING_SIGTERM:
         case MOUNT_UNMOUNTING_SIGKILL:
         case MOUNT_FAILED:
                if (old_state != state)
                        automount_send_ready(a, a->tokens, -ENODEV);
                (void) sd_event_source_set_enabled(a->expire_event_source, SD_EVENT_OFF);
                break;
        default:
                break;
        }

        switch (state) {
        case MOUNT_DEAD:
                automount_send_ready(a, a->expire_tokens, 0);
                break;
         case MOUNT_MOUNTING:
         case MOUNT_MOUNTING_DONE:
         case MOUNT_MOUNTING_SIGTERM:
         case MOUNT_MOUNTING_SIGKILL:
         case MOUNT_REMOUNTING_SIGTERM:
         case MOUNT_REMOUNTING_SIGKILL:
         case MOUNT_UNMOUNTING_SIGTERM:
         case MOUNT_UNMOUNTING_SIGKILL:
         case MOUNT_FAILED:
                if (old_state != state)
                        automount_send_ready(a, a->expire_tokens, -ENODEV);
                break;
        default:
                break;
        }

        return 0;
}
Пример #9
0
static void scope_enter_signal(Scope *s, ScopeState state, ScopeResult f) {
        bool skip_signal = false;
        int r;

        assert(s);

        if (s->result == SCOPE_SUCCESS)
                s->result = f;

        unit_watch_all_pids(UNIT(s));

        /* If we have a controller set let's ask the controller nicely
         * to terminate the scope, instead of us going directly into
         * SIGTERM berserk mode */
        if (state == SCOPE_STOP_SIGTERM)
                skip_signal = bus_scope_send_request_stop(s) > 0;

        if (skip_signal)
                r = 1; /* wait */
        else {
                r = unit_kill_context(
                                UNIT(s),
                                &s->kill_context,
                                state != SCOPE_STOP_SIGTERM ? KILL_KILL :
                                s->was_abandoned            ? KILL_TERMINATE_AND_LOG :
                                                              KILL_TERMINATE,
                                -1, -1, false);
                if (r < 0)
                        goto fail;
        }

        if (r > 0) {
                r = scope_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
                if (r < 0)
                        goto fail;

                scope_set_state(s, state);
        } else if (state == SCOPE_STOP_SIGTERM)
                scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_SUCCESS);
        else
                scope_enter_dead(s, SCOPE_SUCCESS);

        return;

fail:
        log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");

        scope_enter_dead(s, SCOPE_FAILURE_RESOURCES);
}
Пример #10
0
static int scope_start(Unit *u) {
        Scope *s = SCOPE(u);
        int r;

        assert(s);

        if (unit_has_name(u, SPECIAL_INIT_SCOPE))
                return -EPERM;

        if (s->state == SCOPE_FAILED)
                return -EPERM;

        /* We can't fulfill this right now, please try again later */
        if (IN_SET(s->state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL))
                return -EAGAIN;

        assert(s->state == SCOPE_DEAD);

        if (!u->transient && !MANAGER_IS_RELOADING(u->manager))
                return -ENOENT;

        (void) bus_scope_track_controller(s);

        r = unit_acquire_invocation_id(u);
        if (r < 0)
                return r;

        (void) unit_realize_cgroup(u);
        (void) unit_reset_cpu_accounting(u);
        (void) unit_reset_ip_accounting(u);

        unit_export_state_files(UNIT(s));

        r = unit_attach_pids_to_cgroup(u, UNIT(s)->pids, NULL);
        if (r < 0) {
                log_unit_warning_errno(UNIT(s), r, "Failed to add PIDs to scope's control group: %m");
                scope_enter_dead(s, SCOPE_FAILURE_RESOURCES);
                return r;
        }

        s->result = SCOPE_SUCCESS;

        scope_set_state(s, SCOPE_RUNNING);

        /* Start watching the PIDs currently in the scope */
        (void) unit_enqueue_rewatch_pids(UNIT(s));
        return 1;
}
static int busname_watch_fd(BusName *n) {
        int r;

        assert(n);

        if (n->starter_fd < 0)
                return 0;

        if (n->starter_event_source)
                r = sd_event_source_set_enabled(n->starter_event_source, SD_EVENT_ON);
        else
                r = sd_event_add_io(UNIT(n)->manager->event, &n->starter_event_source, n->starter_fd, EPOLLIN, busname_dispatch_io, n);
        if (r < 0) {
                log_unit_warning_errno(UNIT(n)->id, r, "Failed to watch starter fd: %m");
                busname_unwatch_fd(n);
                return r;
        }

        return 0;
}
Пример #12
0
static void automount_enter_runnning(Automount *a) {
        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
        struct stat st;
        int r;

        assert(a);

        /* We don't take mount requests anymore if we are supposed to
         * shut down anyway */
        if (unit_stop_pending(UNIT(a))) {
                log_unit_debug(UNIT(a), "Suppressing automount request since unit stop is scheduled.");
                automount_send_ready(a, a->tokens, -EHOSTDOWN);
                automount_send_ready(a, a->expire_tokens, -EHOSTDOWN);
                return;
        }

        mkdir_p_label(a->where, a->directory_mode);

        /* Before we do anything, let's see if somebody is playing games with us? */
        if (lstat(a->where, &st) < 0) {
                log_unit_warning_errno(UNIT(a), errno, "Failed to stat automount point: %m");
                goto fail;
        }

        if (!S_ISDIR(st.st_mode) || st.st_dev != a->dev_id)
                log_unit_info(UNIT(a), "Automount point already active?");
        else {
                r = manager_add_job(UNIT(a)->manager, JOB_START, UNIT_TRIGGER(UNIT(a)),
                                    JOB_REPLACE, true, &error, NULL);
                if (r < 0) {
                        log_unit_warning(UNIT(a), "Failed to queue mount startup job: %s", bus_error_message(&error, r));
                        goto fail;
                }
        }

        automount_set_state(a, AUTOMOUNT_RUNNING);
        return;

fail:
        automount_enter_dead(a, AUTOMOUNT_FAILURE_RESOURCES);
}
static void busname_enter_listening(BusName *n) {
        int r;

        assert(n);

        if (n->activating) {
                r = busname_watch_fd(n);
                if (r < 0) {
                        log_unit_warning_errno(UNIT(n)->id, r, "%s failed to watch names: %m", UNIT(n)->id);
                        goto fail;
                }

                busname_set_state(n, BUSNAME_LISTENING);
        } else
                busname_set_state(n, BUSNAME_REGISTERED);

        return;

fail:
        busname_enter_signal(n, BUSNAME_SIGTERM, BUSNAME_FAILURE_RESOURCES);
}
Пример #14
0
static int automount_dispatch_io(sd_event_source *s, int fd, uint32_t events, void *userdata) {
        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
        union autofs_v5_packet_union packet;
        Automount *a = AUTOMOUNT(userdata);
        struct stat st;
        Unit *trigger;
        int r;

        assert(a);
        assert(fd == a->pipe_fd);

        if (events != EPOLLIN) {
                log_unit_error(UNIT(a), "Got invalid poll event %"PRIu32" on pipe (fd=%d)", events, fd);
                goto fail;
        }

        r = loop_read_exact(a->pipe_fd, &packet, sizeof(packet), true);
        if (r < 0) {
                log_unit_error_errno(UNIT(a), r, "Invalid read from pipe: %m");
                goto fail;
        }

        switch (packet.hdr.type) {

        case autofs_ptype_missing_direct:

                if (packet.v5_packet.pid > 0) {
                        _cleanup_free_ char *p = NULL;

                        get_process_comm(packet.v5_packet.pid, &p);
                        log_unit_info(UNIT(a), "Got automount request for %s, triggered by %"PRIu32" (%s)", a->where, packet.v5_packet.pid, strna(p));
                } else
                        log_unit_debug(UNIT(a), "Got direct mount request on %s", a->where);

                r = set_ensure_allocated(&a->tokens, NULL);
                if (r < 0) {
                        log_unit_error(UNIT(a), "Failed to allocate token set.");
                        goto fail;
                }

                r = set_put(a->tokens, UINT_TO_PTR(packet.v5_packet.wait_queue_token));
                if (r < 0) {
                        log_unit_error_errno(UNIT(a), r, "Failed to remember token: %m");
                        goto fail;
                }

                automount_enter_runnning(a);
                break;

        case autofs_ptype_expire_direct:
                log_unit_debug(UNIT(a), "Got direct umount request on %s", a->where);

                automount_stop_expire(a);

                r = set_ensure_allocated(&a->expire_tokens, NULL);
                if (r < 0) {
                        log_unit_error(UNIT(a), "Failed to allocate token set.");
                        goto fail;
                }

                r = set_put(a->expire_tokens, UINT_TO_PTR(packet.v5_packet.wait_queue_token));
                if (r < 0) {
                        log_unit_error_errno(UNIT(a), r, "Failed to remember token: %m");
                        goto fail;
                }

                /* Before we do anything, let's see if somebody is playing games with us? */
                if (lstat(a->where, &st) < 0) {
                        log_unit_warning_errno(UNIT(a), errno, "Failed to stat automount point: %m");
                        goto fail;
                }

                if (!S_ISDIR(st.st_mode) || st.st_dev == a->dev_id) {
                        log_unit_info(UNIT(a), "Automount point already unmounted?");
                        automount_send_ready(a, a->expire_tokens, 0);
                        break;
                }

                trigger = UNIT_TRIGGER(UNIT(a));
                if (!trigger) {
                        log_unit_error(UNIT(a), "Unit to trigger vanished.");
                        goto fail;
                }

                r = manager_add_job(UNIT(a)->manager, JOB_STOP, trigger, JOB_REPLACE, &error, NULL);
                if (r < 0) {
                        log_unit_warning(UNIT(a), "Failed to queue umount startup job: %s", bus_error_message(&error, r));
                        goto fail;
                }
                break;

        default:
                log_unit_error(UNIT(a), "Received unknown automount request %i", packet.hdr.type);
                break;
        }

        return 0;

fail:
        automount_enter_dead(a, AUTOMOUNT_FAILURE_RESOURCES);
        return 0;
}
Пример #15
0
static void automount_trigger_notify(Unit *u, Unit *other) {
        Automount *a = AUTOMOUNT(u);
        int r;

        assert(a);
        assert(other);

        /* Filter out invocations with bogus state */
        if (other->load_state != UNIT_LOADED || other->type != UNIT_MOUNT)
                return;

        /* Don't propagate state changes from the mount if we are already down */
        if (!IN_SET(a->state, AUTOMOUNT_WAITING, AUTOMOUNT_RUNNING))
                return;

        /* Propagate start limit hit state */
        if (other->start_limit_hit) {
                automount_enter_dead(a, AUTOMOUNT_FAILURE_MOUNT_START_LIMIT_HIT);
                return;
        }

        /* Don't propagate anything if there's still a job queued */
        if (other->job)
                return;

        /* The mount is successfully established */
        if (IN_SET(MOUNT(other)->state, MOUNT_MOUNTED, MOUNT_REMOUNTING)) {
                (void) automount_send_ready(a, a->tokens, 0);

                r = automount_start_expire(a);
                if (r < 0)
                        log_unit_warning_errno(UNIT(a), r, "Failed to start expiration timer, ignoring: %m");

                automount_set_state(a, AUTOMOUNT_RUNNING);
        }

        if (IN_SET(MOUNT(other)->state,
                   MOUNT_MOUNTING, MOUNT_MOUNTING_DONE,
                   MOUNT_MOUNTED, MOUNT_REMOUNTING,
                   MOUNT_MOUNTING_SIGTERM, MOUNT_MOUNTING_SIGKILL,
                   MOUNT_REMOUNTING_SIGTERM, MOUNT_REMOUNTING_SIGKILL,
                   MOUNT_UNMOUNTING_SIGTERM, MOUNT_UNMOUNTING_SIGKILL,
                   MOUNT_FAILED)) {

                (void) automount_send_ready(a, a->expire_tokens, -ENODEV);
        }

        if (MOUNT(other)->state == MOUNT_DEAD)
                (void) automount_send_ready(a, a->expire_tokens, 0);

        /* The mount is in some unhappy state now, let's unfreeze any waiting clients */
        if (IN_SET(MOUNT(other)->state,
                   MOUNT_DEAD, MOUNT_UNMOUNTING,
                   MOUNT_MOUNTING_SIGTERM, MOUNT_MOUNTING_SIGKILL,
                   MOUNT_REMOUNTING_SIGTERM, MOUNT_REMOUNTING_SIGKILL,
                   MOUNT_UNMOUNTING_SIGTERM, MOUNT_UNMOUNTING_SIGKILL,
                   MOUNT_FAILED)) {

                (void) automount_send_ready(a, a->tokens, -ENODEV);

                automount_set_state(a, AUTOMOUNT_WAITING);
        }
}