示例#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;
}
示例#2
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_fd, EPOLLIN, automount_dispatch_io, u, &a->pipe_event_source);
                        if (r < 0)
                                return r;
                }

                automount_set_state(a, a->deserialized_state);
        }

        return 0;
}
示例#3
0
static void automount_enter_dead(Automount *a, AutomountResult f) {
        assert(a);

        if (a->result == AUTOMOUNT_SUCCESS)
                a->result = f;

        automount_set_state(a, a->result != AUTOMOUNT_SUCCESS ? AUTOMOUNT_FAILED : AUTOMOUNT_DEAD);
}
示例#4
0
文件: automount.c 项目: teg/systemd
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);
}
示例#5
0
static void automount_reset_failed(Unit *u) {
        Automount *a = AUTOMOUNT(u);

        assert(a);

        if (a->state == AUTOMOUNT_FAILED)
                automount_set_state(a, AUTOMOUNT_DEAD);

        a->result = AUTOMOUNT_SUCCESS;
}
示例#6
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);
}
示例#7
0
static void automount_enter_waiting(Automount *a) {
        _cleanup_close_ int ioctl_fd = -1;
        int p[2] = { -1, -1 };
        char name[sizeof("systemd-")-1 + DECIMAL_STR_MAX(pid_t) + 1];
        char options[sizeof("fd=,pgrp=,minproto=5,maxproto=5,direct")-1
                     + DECIMAL_STR_MAX(int) + DECIMAL_STR_MAX(gid_t) + 1];
        bool mounted = false;
        int r, dev_autofs_fd;
        struct stat st;

        assert(a);
        assert(a->pipe_fd < 0);
        assert(a->where);

        set_clear(a->tokens);

        r = unit_fail_if_symlink(UNIT(a), a->where);
        if (r < 0)
                goto fail;

        (void) mkdir_p_label(a->where, 0555);

        unit_warn_if_dir_nonempty(UNIT(a), a->where);

        dev_autofs_fd = open_dev_autofs(UNIT(a)->manager);
        if (dev_autofs_fd < 0) {
                r = dev_autofs_fd;
                goto fail;
        }

        if (pipe2(p, O_NONBLOCK|O_CLOEXEC) < 0) {
                r = -errno;
                goto fail;
        }

        xsprintf(options, "fd=%i,pgrp="PID_FMT",minproto=5,maxproto=5,direct", p[1], getpgrp());
        xsprintf(name, "systemd-"PID_FMT, getpid());
        if (mount(name, a->where, "autofs", 0, options) < 0) {
                r = -errno;
                goto fail;
        }

        mounted = true;

        p[1] = safe_close(p[1]);

        if (stat(a->where, &st) < 0) {
                r = -errno;
                goto fail;
        }

        ioctl_fd = open_ioctl_fd(dev_autofs_fd, a->where, st.st_dev);
        if (ioctl_fd < 0) {
                r = ioctl_fd;
                goto fail;
        }

        r = autofs_protocol(dev_autofs_fd, ioctl_fd);
        if (r < 0)
                goto fail;

        r = autofs_set_timeout(dev_autofs_fd, ioctl_fd, a->timeout_idle_usec);
        if (r < 0)
                goto fail;

        /* Autofs fun fact:
         *
         * Unless we close the ioctl fd here, for some weird reason
         * the direct mount will not receive events from the
         * kernel. */

        r = sd_event_add_io(UNIT(a)->manager->event, &a->pipe_event_source, p[0], EPOLLIN, automount_dispatch_io, a);
        if (r < 0)
                goto fail;

        (void) sd_event_source_set_description(a->pipe_event_source, "automount-io");

        a->pipe_fd = p[0];
        a->dev_id = st.st_dev;

        automount_set_state(a, AUTOMOUNT_WAITING);

        return;

fail:
        log_unit_error_errno(UNIT(a), r, "Failed to initialize automounter: %m");

        safe_close_pair(p);

        if (mounted) {
                r = repeat_unmount(a->where, MNT_DETACH);
                if (r < 0)
                        log_error_errno(r, "Failed to unmount, ignoring: %m");
        }

        automount_enter_dead(a, AUTOMOUNT_FAILURE_RESOURCES);
}
示例#8
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);
        }
}
示例#9
0
static void automount_enter_waiting(Automount *a) {
        int p[2] = { -1, -1 };
        char name[32], options[128];
        bool mounted = false;
        int r, ioctl_fd = -1, dev_autofs_fd;
        struct stat st;

        assert(a);
        assert(a->pipe_fd < 0);
        assert(a->where);

        if (a->tokens)
                set_clear(a->tokens);

        dev_autofs_fd = open_dev_autofs(UNIT(a)->manager);
        if (dev_autofs_fd < 0) {
                r = dev_autofs_fd;
                goto fail;
        }

        /* We knowingly ignore the results of this call */
        mkdir_p_label(a->where, 0555);

        warn_if_dir_nonempty(a->meta.id, a->where);

        if (pipe2(p, O_NONBLOCK|O_CLOEXEC) < 0) {
                r = -errno;
                goto fail;
        }

        snprintf(options, sizeof(options), "fd=%i,pgrp=%u,minproto=5,maxproto=5,direct", p[1], (unsigned) getpgrp());
        char_array_0(options);

        snprintf(name, sizeof(name), "systemd-%u", (unsigned) getpid());
        char_array_0(name);

        if (mount(name, a->where, "autofs", 0, options) < 0) {
                r = -errno;
                goto fail;
        }

        mounted = true;

        close_nointr_nofail(p[1]);
        p[1] = -1;

        if (stat(a->where, &st) < 0) {
                r = -errno;
                goto fail;
        }

        ioctl_fd = open_ioctl_fd(dev_autofs_fd, a->where, st.st_dev);
        if (ioctl_fd < 0) {
                r = ioctl_fd;
                goto fail;
        }

        r = autofs_protocol(dev_autofs_fd, ioctl_fd);
        if (r < 0)
                goto fail;

        r = autofs_set_timeout(dev_autofs_fd, ioctl_fd, 300);
        if (r < 0)
                goto fail;

        /* Autofs fun fact:
         *
         * Unless we close the ioctl fd here, for some weird reason
         * the direct mount will not receive events from the
         * kernel. */

        close_nointr_nofail(ioctl_fd);
        ioctl_fd = -1;

        r = sd_event_add_io(UNIT(a)->manager->event, p[0], EPOLLIN, automount_dispatch_io, a, &a->pipe_event_source);
        if (r < 0)
                goto fail;

        a->pipe_fd = p[0];
        a->dev_id = st.st_dev;

        automount_set_state(a, AUTOMOUNT_WAITING);

        return;

fail:
        assert_se(close_pipe(p) == 0);

        if (ioctl_fd >= 0)
                close_nointr_nofail(ioctl_fd);

        if (mounted)
                repeat_unmount(a->where);

        log_error_unit(UNIT(a)->id,
                       "Failed to initialize automounter: %s", strerror(-r));
        automount_enter_dead(a, AUTOMOUNT_FAILURE_RESOURCES);
}