iommufd_ctx_from_file(9)

✨ NAME ✨

okay so bestie, this is iommufd_ctx_from_file(9) from the Kernel API Manual, and it literally acquires a reference to the iommufd context 💖. That's the whole vibe: you hand it a file, it hands you a context reference (or an error, but we'll get there).

🌸 SYNOPSIS 🌸

struct iommufd_ctx * iommufd_ctx_from_file (struct file *file );

🎀 ARGUMENTS 🎀

• file — the file you're obtaining the reference from 🫶. That's it, that's the arg.

💅 DESCRIPTION 💅

So like, iommufd_ctx_from_file returns a pointer to the iommufd_ctx — slay — otherwise it returns ERR_PTR 😭. Important bestie: the struct file stays owned by the caller, so you still gotta do fput yourself. No sneaky ownership transfer, okay? 🙈

And on success? The caller is responsible for calling iommufd_ctx_put. Periodt. Don't forget the cleanup, bestie 💀.

🔥 SEE ALSO 🔥

• Kernel file: ./drivers/iommu/iommufd/main.c
• iommufd_ctx_get(9)
• iommufd_ctx_from_fd(9)
• iommufd_ctx_put(9)

mwah 💋 this page is from ./drivers/iommu/iommufd, dated October 2026, and yes bestie it's iommufd_ctx_from_file(9) — byeeee 🫶✨