ethnl_bitset32_size(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ethnl_bitset32_size(9) — like, the bitset sizer, bestie

okay so this is a page from the Kernel API Manual, and it's about ethnl_bitset32_size — yes it's a mouthful, no we're not renaming it, it's iconic actually 🎀

✨ NAME ✨

ethnl_bitset32_size — literally calculates the size of a bitset nested attribute. that's the whole job. she's a size calculator and she slays at it 💅

🌸 SYNOPSIS 🌸

int ethnl_bitset32_size (const u32 *val , const u32 *mask , unsigned int
       nbits , ethnl_string_array_t names , bool compact );

🦋 ARGUMENTS 🦋

  • val — the value bitmap, and it's u32 based bestie. the actual bits, the moment, the main character 💖
  • mask — the mask bitmap, also u32 based — and this one's optional, so she can ghost if she wants 🫶
  • nbits — the bit length of the bitset. like how many bits we're working with, no cap 📏
  • names — array of bit names, and yeah this is optional too (type is ethnl_string_array_t if you're keeping track) ✨
  • compact — assume compact format for output. you're telling her "yes queen, keep it tight" 💅

🔥 DESCRIPTION 🔥

so the vibe is: this function estimates the length of a netlink attribute that a later call to ethnl_put_bitset32 is gonna build with the same arguments.

it's the preview. the teaser. the "how much room do i need to reserve" moment. it does not build the attribute, it just tells you how big it'll be 🎀 lowkey a little psychic of her 🌈

⭐ RETURN ⭐

she returns either a negative error code (boo, something went wrong 😭) or the attribute length estimate (yay, we have a number 🎉). that's it. that's the return. periodt.

👑 SEE ALSO 👑

the Kernel file is ./net/ethtool/bitset.c — go read it, it's giving family reunion 🧚

all her besties fr fr 💜

okay that's the page!! shoutout to the Kernel API Manual for having her, and this one's sourced from ./net/ethtool, dated October 2026 — it's giving future icon 💖✨💅

📦 where this page comes from