NAME

       rdma_post_ud_send - post a work request to send a datagram.

SYNOPSIS

       #include <rdma/rdma_verbs.h>

       int  rdma_post_ud_send  (struct  rdma_cm_id *id, void *context, void *addr, size_t length,
       struct ibv_mr *mr, int flags, struct ibv_ah *ah, uint32_t remote_qpn);

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.

       ah          An address handle describing the address of the remote node.

       remote_qpn  The number of the destination queue pair.

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 specified destination queue pair.

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 destination queue pair 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.

       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),    rdma_reg_msgs(3)    ibv_post_send(3),
       rdma_post_recv(3)