rdma_post_ud_send(3) — Linux manual page

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

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)

COLOPHON

       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 2024-06-14.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2024-06-10.)  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)

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