relay_mmap_prepare_buf(9)

📦 version 7.3.1, in nixpkgs unstable

💅 relay_mmap_prepare_buf(9) 💅

okay so bestie, we're in the Kernel API Manual today and this one is a whole little function that's like "hey, let me hook this channel buffer up to a process address space" 🫶

✨ NAME ✨

relay_mmap_prepare_buf — mmap channel buffer to process address space

like literally that's the whole vibe: you got a buffer, you got a process address space, and this lil guy is the matchmaker 💖

🎀 SYNOPSIS 🎀

int relay_mmap_prepare_buf (struct rchan_buf *buf , struct vm_area_desc
*desc );

she takes two pointers and returns an int, that's the whole shape of her 🔥

🌸 ARGUMENTS 🌸

  • buf — the relay channel buffer 💫 like, the actual buffer we're talking about here
  • desc — describing what to map 🦋 she's the one holding the description of the mapping, iykyk

⭐ DESCRIPTION ⭐

Returns 0 if ok, negative on error. that's it, that's the contract, no cap 👑

🚨 also: caller should already have grabbed mmap_lock. so like, do that first bestie. this function is not out here grabbing locks for you, she assumes you already did it. not her job, fr fr 🙈

💜 SEE ALSO 💜

Kernel file ./kernel/relay.c, plus the whole relay fam in alphabetical-ish order:

✨ and that's the page ✨ this icon lived in ./kernel and the date on her birth certificate says October 2026 🎀 go grab mmap_lock before you call her, mwah, ily, bye 💅💖

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