RDMA_REG_MSGS(3) Librdmacm Programmer's Manual RDMA_REG_MSGS(3)NAMErdma_reg_msgs - register data buffer(s) for sending or receiving mes‐
sages.
SYNOPSIS
#include <rdma/rdma_verbs.h>
struct ibv_mr * rdma_reg_msgs (struct rdma_cm_id *id, void *addr,
size_t length);
ARGUMENTS
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.
DESCRIPTION
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 reqeust.
RETURN VALUE
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 fail‐
ure reason.
NOTESrdma_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.
SEE ALSOrdma_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)
