rdma_post_send(3) — Linux manual page


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

NAME         top

       rdma_post_send - post a work request to send a message.

SYNOPSIS         top

       #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         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.

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 remote peer of a connection.

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 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         top

       rdma_cm(7), rdma_connect(3), rdma_accept(3), ibv_post_send(3),
       rdma_post_sendv(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 2021-08-27.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2021-08-18.)  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

librdmacm                      2010-07-19              RDMA_POST_SEND(3)

Pages that refer to this page: rdma_get_recv_comp(3)rdma_get_send_comp(3)rdma_post_recv(3)rdma_post_recvv(3)rdma_post_sendv(3)rdma_reg_msgs(3)rdma_cm(7)