rdma_post_recv(3) — Linux manual page


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

NAME         top

       rdma_post_recv - post a work request to receive an incoming message.

SYNOPSIS         top

       #include <rdma/rdma_verbs.h>

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

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          A registered memory region associated with the posted

DESCRIPTION         top

       Posts a work request to the receive queue of the queue pair
       associated with the rdma_cm_id.  The posted buffer will be queued to
       receive an incoming message sent by the remote peer.

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 a receive buffer is posted
       and large enough to contain all sent data before the peer posts the
       corresponding send message.  The message buffer must have been
       registered before being posted, with the mr parameter referencing the
       registration.  The buffer must remain registered until the receive

       Messages may be posted to an rdma_cm_id only after a queue pair has
       been associated with it.  A queue pair is bound to an rdma_cm_id
       after calling rdma_create_ep or rdma_create_qp, if the rdma_cm_id is
       allocated using rdma_create_id.

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

SEE ALSO         top

       rdma_cm(7), rdma_create_id(3), rdma_create_ep(3), rdma_create_qp(3),
       rdma_reg_read(3), ibv_reg_mr(3), ibv_dereg_mr(3), rdma_post_recvv(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_RECV(3)

Pages that refer to this page: rdma_post_recvv(3)rdma_post_send(3)rdma_post_sendv(3)rdma_post_ud_send(3)rdma_reg_msgs(3)rdma_cm(7)