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rdma_get_recv_comp(3) [centos man page]

RDMA_GET_RECV_COMP(3)					   Librdmacm Programmer's Manual				     RDMA_GET_RECV_COMP(3)

rdma_get_recv_comp - retrieves a completed receive request. SYNOPSIS
#include <rdma/rdma_verbs.h> int rdma_get_recv_comp (struct rdma_cm_id *id, struct ibv_wc *wc); ARGUMENTS
id A reference to a communication identifier to check for completions. wc A reference to a work completion structure to fill in. DESCRIPTION
Retrieves a completed work request for a receive operation. Information about the completed request is returned through the wc parameter, with the wr_id set to the context of the request. For details on the work completion structure, see ibv_poll_cq. RETURN VALUE
Returns the number of returned completions (0 or 1) on success, or -1 on error. If an error occurs, errno will be set to indicate the failure reason. NOTES
This calls polls the receive completion queue associated with an rdma_cm_id. If a completion is not found, the call blocks until a request completes. This call should only be used on rdma_cm_id's that do not share CQs with other rdma_cm_id's, and maintain separate CQs for sends and receive completions. SEE ALSO
rdma_cm(7), ibv_poll_cq(3), rdma_get_send_comp(3), rdma_post_send(3), rdma_post_read(3), rdma_post_write(3) librdmacm 2010-07-19 RDMA_GET_RECV_COMP(3)

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RDMA_POST_RECVV(3)					   Librdmacm Programmer's Manual					RDMA_POST_RECVV(3)

rdma_post_recvv - post a work request to receive incoming messages. SYNOPSIS
#include <rdma/rdma_verbs.h> int rdma_post_recvv (struct rdma_cm_id *id, void *context, struct ibv_sge *sgl, int nsge); ARGUMENTS
id A reference to a communication identifier where the message buffer(s) will be posted. context User-defined context associated with the request. sgl A scatter-gather list of memory buffers posted as a single request. nsge The number of scatter-gather entries in the sgl array. DESCRIPTION
Posts a single work request to the receive queue of the queue pair associated with the rdma_cm_id. The posted buffers will be queued to receive an incoming message sent by the remote peer. RETURN VALUE
Returns 0 on success, or -1 on error. If an error occurs, errno will be set to indicate the failure reason. NOTES
The user is responsible for ensuring that the receive is posted, and the total buffer space is large enough to contain all sent data before the peer posts the corresponding send message. The message buffers must have been registered before being posted, and the buffers must remain registered until the receive completes. Messages may be posted to an rdma_cm_id only after a queue pair has been associated with it. A queue pair is bound to an rdma_cm_id after calling rdma_create_ep or rdma_create_qp, if the rdma_cm_id is allocated using rdma_create_id. The user-defined context associated with the receive request will be returned to the user through the work completion wr_id, work request identifier, field. SEE ALSO
rdma_cm(7), rdma_create_id(3), rdma_create_ep(3), rdma_create_qp(3), rdma_reg_read(3), ibv_reg_mr(3), ibv_dereg_mr(3), rdma_post_recv(3), rdma_post_send(3) librdmacm 2010-07-19 RDMA_POST_RECVV(3)
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