rdma_post_write(3) — Linux manual page

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

NAME

       rdma_post_write - post an RDMA write work request.

SYNOPSIS

       #include <rdma/rdma_verbs.h>

       int rdma_post_write (struct rdma_cm_id *id, void *context, void
       *addr, size_t length, struct ibv_mr *mr, int flags, uint64_t
       remote_addr, uint32_t rkey);

ARGUMENTS

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

       context     User-defined context associated with the request.

       addr        The local address of the source of the write request.

       length      The length of the write operation.

       mr          Optional memory region associated with the local
                   buffer.

       flags       Optional flags used to control the write operation.

       remote_addr The address of the remote registered memory to write
                   into.

       rkey        The registered memory key associated with the remote
                   address.

DESCRIPTION

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

RETURN VALUE

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

NOTES

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

       rdma_cm(7), rdma_connect(3), rdma_accept(3), ibv_post_send(3),
       rdma_post_writev(3), rdma_reg_write(3), rdma_reg_msgs(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_WRITE(3)

Pages that refer to this page: rdma_get_recv_comp(3), rdma_get_send_comp(3), rdma_post_writev(3), rdma_reg_msgs(3), rdma_reg_write(3), rdma_cm(7)

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