rdma_reg_msgs - register data buffer(s) for sending or receiving messages.

       id          A reference to a communication identifier where the message buffer(s) will be used.

       addr        The address of the memory buffer(s) to register.

       length      The total length of the memory to register.

       Registers  an  array  of  memory  buffers used for sending and receiving messages or for RDMA operations.
       Memory buffers registered using rdma_reg_msgs may be posted to  an  rdma_cm_id  using  rdma_post_send  or
       rdma_post_recv,  or  specified  as  the  target  of an RDMA read operation or the source of an RDMA write
       request.

       rdma_reg_msgs - register data buffer(s) for sending or receiving messages.

       rdma_reg_msgs is used to register an array of data buffers that will be used send and/or receive messages
       on  a  queue  pair  associated  with an rdma_cm_id.  The memory buffer is registered with the proteection
       domain associated with the idenfier.  The start of the data buffer array is specified  through  the  addr
       parameter, and the total size of the array is given by length.

       All  data  buffers should be registered before being posted as a work request.  Users must deregister all
       registered memory by calling rdma_dereg_mr.

       Returns a reference to the registered memory region on success, or NULL on error.  If  an  error  occurs,
       errno will be set to indicate the failure reason.

rdma_cm(7), rdma_create_id(3),  rdma_create_ep(3),  rdma_reg_read(3),  rdma_reg_write(3),  ibv_reg_mr(3),
       ibv_dereg_mr(3),    rdma_post_send(3),    rdma_post_recv(3),    rdma_post_read(3),    rdma_post_readv(3),
       rdma_post_write(3), rdma_post_writev(3)

librdmacm                                          2010-07-19                                   RDMA_REG_MSGS(3)

#include<rdma/rdma_verbs.h>structibv_mr*rdma_reg_msgs(structrdma_cm_id*id,void*addr,size_tlength);