rdma_post_writev(3) — Linux manual page


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

NAME         top

       rdma_post_writev - post an RDMA write work request.

SYNOPSIS         top

       #include <rdma/rdma_verbs.h>

       int rdma_post_writev (struct rdma_cm_id *id, void *context,
       struct ibv_sge *sgl, int nsge, int flags, uint64_t remote_addr,
       uint32_t rkey);

ARGUMENTS         top

       id          A reference to a communication identifier where the
                   request will be posted.

       context     User-defined context associated with the request.

       sgl         A scatter-gather list of the source buffers of the

       nsge        The number of scatter-gather array entries.

       flags       Optional flags used to control the write operation.

       remote_addr The address of the remote registered memory to write

       rkey        The registered memory key associated with the remote

DESCRIPTION         top

       Posts a work request to the send queue of the queue pair
       associated with the rdma_cm_id.  The contents of the local data
       buffers will be written into the remote memory region.

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

       For a list of supported flags, see ibv_post_send.  Unless inline
       data is specified, the local data buffers must have been
       registered before the write is issued, and the buffers must
       remain registered until the write completes.  The remote buffers
       must always be registered.

       Write 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 write 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_write(3), rdma_reg_write(3), rdma_reg_msgs(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_WRITEV(3)

Pages that refer to this page: rdma_post_write(3)rdma_reg_msgs(3)rdma_cm(7)