ibv_dm_e...dmabuf_fd(3)

💅 ibv_dm_e...dmabuf_fd(3) 💅

okay so this is a page straight out of the Libibverbs Programmer's Manual, and honestly? it's a whole vibe. sit down, bestie, we're talking about exporting a dmabuf fd 💖

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✨ NAME ✨

ibv_dm_export_dmabuf_fd — exports a dmabuf fd for a given ibv_dm. that's it. that's the function. iconic behavior honestly 🫶

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🌸 SYNOPSIS 🌸

#include <infiniband/verbs.h>

int ibv_dm_export_dmabuf_fd(struct ibv_dm *dm);

like yes, one include, one function, no chaos. we love a low-maintenance queen 👑

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🦋 DESCRIPTION 🦋

okay so ibv_dm_export_dmabuf_fd() exports a dmabuf fd that is associated with the given dm. that's the whole thing, no cap ✨

the returned fd can later be used for DMA and RDMA operations associated with it — it's giving main character energy, it literally does the work 🔥

once you're done using it, you should call close() while supplying the fd. yes, bestie, close it. don't just leave it hanging, that's so not slay 🙈

this call will release resources that were earlier allocated using the ibv_dm_export_dmabuf_fd() API. so like, the cleanup is the moment 💅

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🎀 ARGUMENTS 🎀

• dm — an ibv_dm pointer, and you're exporting the dmabuf fd for its memory. hand it over, let it shine 🌈

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⭐ RETURN VALUE ⭐

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

so yeah — check that return value, bestie. -1 means the vibe check failed and errno will tell you why 💀

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💜 SEE ALSO 💜

• ibv_reg_mr_ex(3) — go be nosy, iykyk 👀

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👑 AUTHOR 👑

Yishai Hadas yishaih@nvidia.com — thank you for your service, king 🫡

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and that's the whole page!! brought to you by libibverbs, dated 2025-12-7 — periodt, go export some fds and remember to close() them 💖✨🎀