Ejemplos de dm_task_set_major en C++ (Cpp)

Ejemplo n.º 1

Archivo: devmapper.c Proyecto: cathay4t/multipath-tools

char *
dm_mapname(int major, int minor)
{
	char * response = NULL;
	const char *map;
	struct dm_task *dmt;
	int r;
	int loop = MAX_WAIT * LOOPS_PER_SEC;

	if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
		return NULL;

	if (!dm_task_set_major(dmt, major) ||
	    !dm_task_set_minor(dmt, minor))
		goto bad;

	dm_task_no_open_count(dmt);

	/*
	 * device map might not be ready when we get here from
	 * daemon uev_trigger -> uev_add_map
	 */
	while (--loop) {
		r = dm_task_run(dmt);

		if (r)
			break;

		usleep(1000 * 1000 / LOOPS_PER_SEC);
	}

	if (!r) {
		condlog(0, "%i:%i: timeout fetching map name", major, minor);
		goto bad;
	}

	map = dm_task_get_name(dmt);
	if (map && strlen(map))
		response = STRDUP((char *)dm_task_get_name(dmt));

	dm_task_destroy(dmt);
	return response;
bad:
	dm_task_destroy(dmt);
	condlog(0, "%i:%i: error fetching map name", major, minor);
	return NULL;
}

Ejemplo n.º 2

Archivo: libdevmapper-event.c Proyecto: SteamMOD/android_bootable_steam_device-mapper

/* Get uuid of a device */
static struct dm_task *_get_device_info(const struct dm_event_handler *dmevh)
{
	struct dm_task *dmt;
	struct dm_info info;

	if (!(dmt = dm_task_create(DM_DEVICE_INFO))) {
		log_error("_get_device_info: dm_task creation for info failed");
		return NULL;
	}

	if (dmevh->uuid)
		dm_task_set_uuid(dmt, dmevh->uuid);
	else if (dmevh->dev_name)
		dm_task_set_name(dmt, dmevh->dev_name);
	else if (dmevh->major && dmevh->minor) {
		dm_task_set_major(dmt, dmevh->major);
		dm_task_set_minor(dmt, dmevh->minor);
        }

	/* FIXME Add name or uuid or devno to messages */
	if (!dm_task_run(dmt)) {
		log_error("_get_device_info: dm_task_run() failed");
		goto failed;
	}

	if (!dm_task_get_info(dmt, &info)) {
		log_error("_get_device_info: failed to get info for device");
		goto failed;
	}

	if (!info.exists) {
		log_error("_get_device_info: device not found");
		goto failed;
	}

	return dmt;

failed:
	dm_task_destroy(dmt);
	return NULL;
}