NAME

       rdma_post_send - post a work request to send a message.

SYNOPSIS

       #include <rdma/rdma_verbs.h>

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

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          Optional registered memory region associated with the posted buffer.

       flags       Optional flags used to control the send operation.

DESCRIPTION

       Posts  a  work request to the send queue of the queue pair associated with the rdma_cm_id.
       The contents of the posted buffer will be sent to the remote peer of a connection.

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 remote peer has queued a receive request
       before issuing the send operations.  For a list of  supported  flags,  see  ibv_post_send.
       Unless the send request is using inline data, the message buffer must have been registered
       before being posted, with the mr parameter referencing the registration.  The buffer  must
       remain registered until the send completes.

       Send  operations  may not be posted to an rdma_cm_id or the corresponding queue pair until
       it has been connected.

       The user-defined context associated with the send request will be  returned  to  the  user
       through the work completion wr_id, work request identifier, field.

SEE ALSO

       rdma_cm(7),   rdma_connect(3),   rdma_accept(3),   ibv_post_send(3),   rdma_post_sendv(3),
       rdma_post_recv(3)