drm_vma_node_verify_access(9)

✨ drm_vma_node_verify_access ✨

okay bestie, so this one is a lil helper from the Kernel API Manual — it's drm_vma_node_verify_access(9) and honestly? she's a small icon doing a very specific job. let's get into it 💅

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🌸 SYNOPSIS 🌸

int drm_vma_node_verify_access (struct drm_vma_offset_node *node ,
       struct drm_file *tag );

like, two args, one int back. no cap, that's the whole vibe check.

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🎀 ARGUMENTS 🎀

• node — the offset node. that's the thing being protected, the main character of this story 👑
• tag — the tag of the file we're checking. yes, the name is literally tag, we don't make the rules 🫶

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🦋 DESCRIPTION 🦋

so what she does is check whether tag is actually granted access to node. that's it. that's the whole thing. 💖

and the tea is: it's literally the same as drm_vma_node_is_allowed, but it's built to be a drop-in helper for TTM verify_access callbacks. so if you've got one of those callbacks and you need something that slots right in — she's your girl, no rewriting required ✨

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⭐ RETURN ⭐

• 0 — access granted, we love to see it, slay 🎉
• -EACCES — access denied, not today, blocked, do not pass go 😭

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💜 SEE ALSO 💜

• Kernel file: ./include/drm/drm_vma_manager.h
• drm_vma_offset_exact_lookup_locked(9)
• drm_vma_offset_lock_lookup(9)
• drm_vma_offset_unlock_lookup(9)
• drm_vma_node_reset(9)
• drm_vma_node_start(9)
• drm_vma_node_size(9)
• drm_vma_node_offset_addr(9)
• drm_vma_node_unmap(9)

like, go read the whole friend group, they're all iconic in their own way 🧚

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fr fr bestie, if this returns -EACCES just know it's not personal, the node is simply not letting you in 🙈

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okay that's the page!! huge love to the ./include/drm girlies for hosting this one, and this cutie is dated October 2026 — drm_vma_node_verify_access(9) out, mwah 💋🌈