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;
}
/* 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;
}
