sg_nents_for_len(9)

📦 version 7.3.1, in nixpkgs unstable

✨ sg_nents_for_len(9) ✨

Okay so bestie, welcome to the sg_nents_for_len(9) page from the Kernel API Manual — yes that's the manual name, yes it's a mouthful, no we're not skipping it 💅 This little function is genuinely iconic if you're doing scatterlist math, so let's get into it.

🌸 NAME 🌸

sg_nents_for_len — returns the total count of entries in a scatterlist that you need to satisfy the length you supplied 🎀

🦋 SYNOPSIS 🦋

int sg_nents_for_len (struct scatterlist *sg , u64 len );

⭐ ARGUMENTS ⭐

  • sg — the scatterlist itself, your main character 🫶
  • len — the total required length, like the amount of stuff you're trying to fit

💖 DESCRIPTION 💖

So what this does: it figures out the number of entries in sg that are required to meet the supplied length — and lowkey the important part is that it takes chaining into account as well. No cap, chaining is included in the vibe check 💅

🔥 RETURN 🔥

It hands you back the number of sg entries needed ✨ — and if something goes wrong you get a negative error on failure. So like, negative = bad vibes, check it 😭

🌈 SEE ALSO 🌈

Kernel file ./lib/scatterlist.c — and honestly the whole scatterlist friend group showed up, so here they all are:

Ok that's the whole page bestie, nothing skipped, every flag and reference intact — go forth and count your sg entries 💜

Big kiss, this page lived in ./lib and it's dated October 2026 — so it's basically a time traveler and we stan 🧚✨

📦 where this page comes from