GQuark  bd_mpath_error_quark (void) {

        return g_quark_from_static_string ("g-bd-mpath-error-quark");

}

static gboolean  bd_mpath_is_tech_avail_stub (BDMpathTech tech, guint64 mode, GError **error) {

    g_critical ("The function 'bd_mpath_is_tech_avail' called, but not implemented!");

    g_set_error (error, BD_INIT_ERROR, BD_INIT_ERROR_NOT_IMPLEMENTED,

                "The function 'bd_mpath_is_tech_avail' called, but not implemented!");

    return FALSE;

}

static gboolean  (*_bd_mpath_is_tech_avail) (BDMpathTech tech, guint64 mode, GError **error) = bd_mpath_is_tech_avail_stub;

/**

 * bd_mpath_is_tech_avail:

 * @tech: the queried tech

 * @mode: a bit mask of queried modes of operation for @tech

 * @error: (out): place to store error (details about why the @tech-@mode combination is not available)

 *

 * Returns: whether the @tech-@mode combination is avaible -- supported by the

 *          plugin implementation and having all the runtime dependencies available

 */

gboolean  bd_mpath_is_tech_avail (BDMpathTech tech, guint64 mode, GError **error) {

    return _bd_mpath_is_tech_avail (tech, mode, error);

}

static gboolean  bd_mpath_flush_mpaths_stub (GError **error) {

    g_critical ("The function 'bd_mpath_flush_mpaths' called, but not implemented!");

    g_set_error (error, BD_INIT_ERROR, BD_INIT_ERROR_NOT_IMPLEMENTED,

                "The function 'bd_mpath_flush_mpaths' called, but not implemented!");

    return FALSE;

}

static gboolean  (*_bd_mpath_flush_mpaths) (GError **error) = bd_mpath_flush_mpaths_stub;

/**

 * bd_mpath_flush_mpaths:

 * @error: (out): place to store error (if any)

 *

 * Returns: whether multipath device maps were successfully flushed or not

 *

 * Flushes all unused multipath device maps.

 *

 * Tech category: %BD_MPATH_TECH_BASE-%BD_MPATH_TECH_MODE_MODIFY

 */

gboolean  bd_mpath_flush_mpaths (GError **error) {

    return _bd_mpath_flush_mpaths (error);

}

static gboolean  bd_mpath_is_mpath_member_stub (const gchar *device, GError **error) {

    g_critical ("The function 'bd_mpath_is_mpath_member' called, but not implemented!");

    g_set_error (error, BD_INIT_ERROR, BD_INIT_ERROR_NOT_IMPLEMENTED,

                "The function 'bd_mpath_is_mpath_member' called, but not implemented!");

    return FALSE;

}

static gboolean  (*_bd_mpath_is_mpath_member) (const gchar *device, GError **error) = bd_mpath_is_mpath_member_stub;

/**

 * bd_mpath_is_mpath_member:

 * @device: device to test

 * @error: (out): place to store error (if any)

 *

 * Returns: %TRUE if the device is a multipath member, %FALSE if not or an error

 * appeared when queried (@error is set in those cases)

 *

 * Tech category: %BD_MPATH_TECH_BASE-%BD_MPATH_TECH_MODE_QUERY

 */

gboolean  bd_mpath_is_mpath_member (const gchar *device, GError **error) {

    return _bd_mpath_is_mpath_member (device, error);

}

static gchar** bd_mpath_get_mpath_members_stub (GError **error) {

    g_critical ("The function 'bd_mpath_get_mpath_members' called, but not implemented!");

    g_set_error (error, BD_INIT_ERROR, BD_INIT_ERROR_NOT_IMPLEMENTED,

                "The function 'bd_mpath_get_mpath_members' called, but not implemented!");

    return NULL;

}

static gchar** (*_bd_mpath_get_mpath_members) (GError **error) = bd_mpath_get_mpath_members_stub;

/**

 * bd_mpath_get_mpath_members:

 * @error: (out): place to store error (if any)

 *

 * Returns: (transfer full) (array zero-terminated=1): list of names of all devices that are

 *                                                     members of the mpath mappings (or %NULL

 *                                                     in case of error)

 *

 * Tech category: %BD_MPATH_TECH_BASE-%BD_MPATH_TECH_MODE_QUERY

 */

gchar** bd_mpath_get_mpath_members (GError **error) {

    return _bd_mpath_get_mpath_members (error);

}

static gboolean  bd_mpath_set_friendly_names_stub (gboolean enabled, GError **error) {

    g_critical ("The function 'bd_mpath_set_friendly_names' called, but not implemented!");

    g_set_error (error, BD_INIT_ERROR, BD_INIT_ERROR_NOT_IMPLEMENTED,

                "The function 'bd_mpath_set_friendly_names' called, but not implemented!");

    return FALSE;

}

static gboolean  (*_bd_mpath_set_friendly_names) (gboolean enabled, GError **error) = bd_mpath_set_friendly_names_stub;

/**

 * bd_mpath_set_friendly_names:

 * @enabled: whether friendly names should be enabled or not

 * @error: (out): place to store error (if any)

 *

 * Returns: if successfully set or not

 *

 * Tech category: %BD_MPATH_TECH_FRIENDLY_NAMES-%BD_MPATH_TECH_MODE_MODIFY

 */

gboolean  bd_mpath_set_friendly_names (gboolean enabled, GError **error) {

    return _bd_mpath_set_friendly_names (enabled, error);

}

static gpointer load_mpath_from_plugin(const gchar *so_name) {

    void *handle = NULL;

    char *error = NULL;

    gboolean (*check_fn) (void) = NULL;

    gboolean (*init_fn) (void) = NULL;

    handle = dlopen(so_name, RTLD_LAZY);

    if (!handle) {

        g_warning("failed to load module mpath: %s", dlerror());

        return NULL;

    }

    dlerror();

    * (void**) (&check_fn) = dlsym(handle, "bd_mpath_check_deps");

    if ((error = dlerror()) != NULL)

        g_debug("failed to load the check() function for mpath: %s", error);

    /* coverity[dead_error_condition] */

    if (!g_getenv ("LIBBLOCKDEV_SKIP_DEP_CHECKS") && check_fn && !check_fn()) {

        dlclose(handle);

        return NULL;

    }

    check_fn = NULL;

    dlerror();

    * (void**) (&init_fn) = dlsym(handle, "bd_mpath_init");

    if ((error = dlerror()) != NULL)

        g_debug("failed to load the init() function for mpath: %s", error);

    /* coverity[dead_error_condition] */

    if (init_fn && !init_fn()) {

        dlclose(handle);

        return NULL;

    }

    init_fn = NULL;

    dlerror();

    * (void**) (&_bd_mpath_is_tech_avail) = dlsym(handle, "bd_mpath_is_tech_avail");

    if ((error = dlerror()) != NULL)

        g_warning("failed to load bd_mpath_is_tech_avail: %s", error);

    dlerror();

    * (void**) (&_bd_mpath_flush_mpaths) = dlsym(handle, "bd_mpath_flush_mpaths");

    if ((error = dlerror()) != NULL)

        g_warning("failed to load bd_mpath_flush_mpaths: %s", error);

    dlerror();

    * (void**) (&_bd_mpath_is_mpath_member) = dlsym(handle, "bd_mpath_is_mpath_member");

    if ((error = dlerror()) != NULL)

        g_warning("failed to load bd_mpath_is_mpath_member: %s", error);

    dlerror();

    * (void**) (&_bd_mpath_get_mpath_members) = dlsym(handle, "bd_mpath_get_mpath_members");

    if ((error = dlerror()) != NULL)

        g_warning("failed to load bd_mpath_get_mpath_members: %s", error);

    dlerror();

    * (void**) (&_bd_mpath_set_friendly_names) = dlsym(handle, "bd_mpath_set_friendly_names");

    if ((error = dlerror()) != NULL)

        g_warning("failed to load bd_mpath_set_friendly_names: %s", error);

    return handle;

}

static gboolean unload_mpath (gpointer handle) {

    char *error = NULL;

    gboolean (*close_fn) (void) = NULL;

    _bd_mpath_is_tech_avail = bd_mpath_is_tech_avail_stub;

    _bd_mpath_flush_mpaths = bd_mpath_flush_mpaths_stub;

    _bd_mpath_is_mpath_member = bd_mpath_is_mpath_member_stub;

    _bd_mpath_get_mpath_members = bd_mpath_get_mpath_members_stub;

    _bd_mpath_set_friendly_names = bd_mpath_set_friendly_names_stub;

    dlerror();

    * (void**) (&close_fn) = dlsym(handle, "bd_mpath_close");

    if (((error = dlerror()) != NULL) || !close_fn)

        g_debug("failed to load the close_plugin() function for mpath: %s", error);

    /* coverity[dead_error_condition] */

    if (close_fn) {

        close_fn();

    }

    return dlclose(handle) == 0;

}