skb_to_sgvec(9)

📦 version 7.3.1, in nixpkgs unstable

💅 skb_to_sgvec(9) 💅

okay bestie, welcome to the Kernel API Manual page for skb_to_sgvec(9) — yes, the whole title is in the house. This is the function that fills a scatter-gather list from a socket buffer, and we're gonna make it make sense. 🫶

🌸 NAME 🌸

skb_to_sgvec — fill a scatter-gather list from a socket buffer. that's the whole name vibe. 💖

✨ SYNOPSIS ✨

int skb_to_sgvec (struct sk_buff *skb , struct scatterlist *sg , int
       offset , int len );

no cap, that's the signature. 🎀

🎀 ARGUMENTS 🎀

  • skb — socket buffer containing the buffers to be mapped. literally the source snack. 🍓
  • sg — the scatter-gather list to map into. this is the destination bestie. 🎀
  • offset — the offset into the buffer's contents to start mapping. where the mapping begins, iykyk. ✨
  • len — length of buffer space to be mapped. how much buffer space we're mapping. 💅

🦋 DESCRIPTION 🦋

okay so what it does: fill the specified scatter-gather list with mappings/pointers into a region of the buffer space attached to a socket buffer. that's the main character move. 💫

It returns either the number of scatterlist items used, or -EMSGSIZE if the contents could not fit. so if it doesn't fit, it's giving -EMSGSIZE, and that's the error, periodt. 😭

🌈 SEE ALSO 🌈

Kernel file ./net/core/skbuff.c is lowkey the source spot, and the whole extended universe is here. no cap, every single reference:

💖 and that's the page, bestie. source/version: ./net/core · date: October 2026 · page: skb_to_sgvec(9) — slay. 💅

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