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  registration.   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)