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ibv_dm_export_dmabuf_fd(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | ARGUMENTS | RETURN VALUE | SEE ALSO | AUTHOR | COLOPHON 

ibv_dm_...mabuf_fd(3) Libibverbs Programmer’s Manualibv_dm_...mabuf_fd(3)

NAME         top

       ibv_dm_export_dmabuf_fd - export dmabuf fd for a given ibv_dm.

SYNOPSIS         top

              #include <infiniband/verbs.h>

              int ibv_dm_export_dmabuf_fd(struct ibv_dm *dm);

DESCRIPTION         top

       ibv_dm_export_dmabuf_fd() exports a dmabuf fd that is associated
       with the given dm.

       The returned fd can be later used for DMA and RDMA operations
       associated with it.

       Once the usage has been ended close() should be called while
       supplying the fd.

       This call will release resources that were earlier allocated using
       the ibv_dm_export_dmabuf_fd() API.

ARGUMENTS         top

       dm     An ibv_dm pointer to export the dmabuf fd for its memory.

RETURN VALUE         top

       ibv_dm_export_dmabuf_fd() returns an fd number >= 0 upon success,
       or -1 if the request fails and errno set to the error.

SEE ALSO         top

       ibv_reg_mr_ex(3)

AUTHOR         top

       Yishai Hadas ⟨yishaih@nvidia.com⟩

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 2026-05-24.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2026-05-20.)  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

libibverbs                      2025-12-7           ibv_dm_...mabuf_fd(3)

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