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rdma_cm: add rdma_consumer_reject_data helper function 

rdma_consumer_reject_data() will return the private data pointer
and length if any is available.

Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
hifive-unleashed-5.1
Steve Wise 2016-10-26 12:36:47 -07:00 committed by Doug Ledford
parent 5042a73d3e
commit 5f24410408
2 changed files with 26 additions and 0 deletions
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16
drivers/infiniband/core/cma.c
View File

@ -128,6 +128,22 @@ bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason)
}
EXPORT_SYMBOL(rdma_is_consumer_reject);
const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
struct rdma_cm_event *ev, u8 *data_len)
{
const void *p;
if (rdma_is_consumer_reject(id, ev->status)) {
*data_len = ev->param.conn.private_data_len;
p = ev->param.conn.private_data;
} else {
*data_len = 0;
p = NULL;
}
return p;
}
EXPORT_SYMBOL(rdma_consumer_reject_data);
static void cma_add_one(struct ib_device *device);
static void cma_remove_one(struct ib_device *device, void *client_data);

10
include/rdma/rdma_cm.h
View File

@ -403,4 +403,14 @@ const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
*/
bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason);
/**
* rdma_consumer_reject_data - return the consumer reject private data and
* length, if any.
* @id: Communication identifier that received the REJECT event.
* @ev: RDMA CM reject event.
* @data_len: Pointer to the resulting length of the consumer data.
*/
const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
struct rdma_cm_event *ev, u8 *data_len);
#endif /* RDMA_CM_H */