rdma_post_ud_send(3) — Linux manual page


RDMA_POST_UD_SEND(3)    Librdmacm Programmer's Manual   RDMA_POST_UD_SEND(3)

NAME         top

       rdma_post_ud_send - post a work request to send a datagram.

SYNOPSIS         top

       #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         top

       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

       remote_qpn  The number of the destination queue pair.

DESCRIPTION         top

       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         top

       Returns 0 on success, or -1 on error.  If an error occurs, errno will
       be set to indicate the failure reason.

NOTES         top

       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

       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         top

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

COLOPHON         top

       This page is part of the rdma-core (RDMA Core Userspace Libraries and
       Daemons) project.  Information about the project can be found at 
       ⟨https://github.com/linux-rdma/rdma-core⟩.  If you have a bug report
       for this manual page, send it to linux-rdma@vger.kernel.org.  This
       page was obtained from the project's upstream Git repository
       ⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2020-09-18.  (At
       that time, the date of the most recent commit that was found in the
       repository was 2020-09-16.)  If you discover any rendering problems
       in this HTML version of the page, or you believe there is a better or
       more up-to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not part
       of the original manual page), send a mail to man-pages@man7.org

librdmacm                        2010-07-19             RDMA_POST_UD_SEND(3)

Pages that refer to this page: rdma_cm(7)