/*
* do_local_work
*
* Any processing errors are placed in the 'rq'
* structure to be reported back to the kernel.
* It may be pointless for this function to
* return an int.
*
* Returns: 0 on success, -EXXX on failure
*/
static int do_local_work(void *data)
{
int r;
struct clog_request *rq;
struct dm_ulog_request *u_rq = NULL;
r = kernel_recv(&rq);
if (r)
return r;
if (!rq)
return 0;
u_rq = &rq->u_rq;
LOG_DBG("[%s] Request from kernel received: [%s/%u]",
SHORT_UUID(u_rq->uuid), RQ_TYPE(u_rq->request_type),
u_rq->seq);
switch (u_rq->request_type) {
case DM_ULOG_CTR:
case DM_ULOG_DTR:
case DM_ULOG_GET_REGION_SIZE:
case DM_ULOG_IN_SYNC:
case DM_ULOG_GET_SYNC_COUNT:
case DM_ULOG_STATUS_INFO:
case DM_ULOG_STATUS_TABLE:
case DM_ULOG_PRESUSPEND:
/* We do not specify ourselves as server here */
r = do_request(rq, 0);
if (r)
LOG_DBG("Returning failed request to kernel [%s]",
RQ_TYPE(u_rq->request_type));
r = kernel_send(u_rq);
if (r)
LOG_ERROR("Failed to respond to kernel [%s]",
RQ_TYPE(u_rq->request_type));
break;
case DM_ULOG_RESUME:
/*
* Resume is a special case that requires a local
* component to join the CPG, and a cluster component
* to handle the request.
*/
r = local_resume(u_rq);
if (r) {
LOG_DBG("Returning failed request to kernel [%s]",
RQ_TYPE(u_rq->request_type));
r = kernel_send(u_rq);
if (r)
LOG_ERROR("Failed to respond to kernel [%s]",
RQ_TYPE(u_rq->request_type));
break;
}
/* ELSE, fall through */
case DM_ULOG_IS_CLEAN:
case DM_ULOG_FLUSH:
case DM_ULOG_MARK_REGION:
case DM_ULOG_GET_RESYNC_WORK:
case DM_ULOG_SET_REGION_SYNC:
case DM_ULOG_IS_REMOTE_RECOVERING:
case DM_ULOG_POSTSUSPEND:
r = cluster_send(rq);
if (r) {
u_rq->data_size = 0;
u_rq->error = r;
kernel_send(u_rq);
}
break;
case DM_ULOG_CLEAR_REGION:
r = kernel_ack(u_rq->seq, 0);
r = cluster_send(rq);
if (r) {
/*
* FIXME: store error for delivery on flush
* This would allow us to optimize MARK_REGION
* too.
*/
}
break;
default:
LOG_ERROR("Invalid log request received (%u), ignoring.",
u_rq->request_type);
return 0;
}
if (r && !u_rq->error)
u_rq->error = r;
return r;
}
* do_local_work
*
* Any processing errors are placed in the 'rq'
* structure to be reported back to the kernel.
* It may be pointless for this function to
* return an int.
*
* Returns: 0 on success, -EXXX on failure
*/
static int do_local_work(void *data __attribute__((unused)))
{
int r;
struct clog_request *rq;
struct dm_ulog_request *u_rq = NULL;
r = kernel_recv(&rq);
if (r)
return r;
if (!rq)
return 0;
u_rq = &rq->u_rq;
LOG_DBG("[%s] Request from kernel received: [%s/%u]",
SHORT_UUID(u_rq->uuid), RQ_TYPE(u_rq->request_type),
u_rq->seq);
switch (u_rq->request_type) {
case DM_ULOG_CTR:
case DM_ULOG_DTR:
case DM_ULOG_GET_REGION_SIZE:
case DM_ULOG_IN_SYNC:
