ibv_dm_export_dmabuf_fd(3) Libibverbs Programmer’s Manual ibv_dm_export_dmabuf_fd(3)

ibv_dm_export_dmabuf_fd - export dmabuf fd for a given ibv_dm.

#include <infiniband/verbs.h>
int ibv_dm_export_dmabuf_fd(struct ibv_dm *dm);

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.

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

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

ibv_reg_mr_ex(3)

Yishai Hadas yishaih@nvidia.com

2025-12-7 libibverbs