Пример #1
0
static bool automount_check_gc(Unit *u) {
        assert(u);

        if (!UNIT_TRIGGER(u))
                return false;

        return UNIT_VTABLE(UNIT_TRIGGER(u))->check_gc(UNIT_TRIGGER(u));
}
Пример #2
0
static int automount_start(Unit *u) {
        Automount *a = AUTOMOUNT(u);
        Unit *trigger;
        int r;

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

        if (path_is_mount_point(a->where, NULL, 0) > 0) {
                log_unit_error(u, "Path %s is already a mount point, refusing start.", a->where);
                return -EEXIST;
        }

        trigger = UNIT_TRIGGER(u);
        if (!trigger || trigger->load_state != UNIT_LOADED) {
                log_unit_error(u, "Refusing to start, unit to trigger not loaded.");
                return -ENOENT;
        }

        r = unit_start_limit_test(u);
        if (r < 0) {
                automount_enter_dead(a, AUTOMOUNT_FAILURE_START_LIMIT_HIT);
                return r;
        }

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

        a->result = AUTOMOUNT_SUCCESS;
        automount_enter_waiting(a);
        return 1;
}
Пример #3
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 #4
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_debug_unit(UNIT(a)->id,
                               "Suppressing automount request on %s since unit stop is scheduled.", UNIT(a)->id);
                automount_send_ready(a, -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_warning_unit(UNIT(a)->id,
                                 "%s failed to stat automount point: %m", UNIT(a)->id);
                goto fail;
        }

        if (!S_ISDIR(st.st_mode) || st.st_dev != a->dev_id)
                log_info_unit(UNIT(a)->id,
                              "%s's automount point already active?", UNIT(a)->id);
        else {
                r = manager_add_job(UNIT(a)->manager, JOB_START, UNIT_TRIGGER(UNIT(a)),
                                    JOB_REPLACE, true, &error, NULL);
                if (r < 0) {
                        log_warning_unit(UNIT(a)->id,
                                         "%s failed to queue mount startup job: %s",
                                         UNIT(a)->id, 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 int automount_start(Unit *u) {
        Automount *a = AUTOMOUNT(u);

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

        if (path_is_mount_point(a->where, 0) > 0) {
                log_unit_error(u, "Path %s is already a mount point, refusing start.", a->where);
                return -EEXIST;
        }

        if (UNIT_TRIGGER(u)->load_state != UNIT_LOADED)
                return -ENOENT;

        a->result = AUTOMOUNT_SUCCESS;
        automount_enter_waiting(a);
        return 1;
}
Пример #6
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;
}