rdma_get_recv_comp(3) [centos man page]

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

NAME

       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)

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

NAME

       rdma_post_recv - post a work request to receive an incoming message.

SYNOPSIS

       #include <rdma/rdma_verbs.h>

       int rdma_post_recv (struct rdma_cm_id *id, void *context, void *addr, size_t length, struct ibv_mr *mr);

ARGUMENTS

       id	   A reference to a communication identifier where the message buffer will be posted.

       context	   User-defined context associated with the request.

       addr	   The address of the memory buffer to post.

       length	   The length of the memory buffer.

       mr	   A registered memory region associated with the posted buffer.

DESCRIPTION

       Posts a work request to the receive queue of the queue pair associated with the rdma_cm_id.  The posted buffer 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 a receive buffer is posted and large enough to contain all sent data before the  peer	posts  the
       corresponding send message.  The message buffer must have been registered before being posted, with the mr parameter referencing the regis-
       tration.  The buffer 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_recvv(3),
       rdma_post_send(3)

librdmacm							    2010-07-19							 RDMA_POST_RECV(3)