ixgbe_add_rx_frag(9)

📦 version 7.3.1, in nixpkgs unstable

💖 ixgbe_add_rx_frag(9) 💖

okay so bestie, we're in the ixgbe corner of the Kernel API Manual today — this is ixgbe_add_rx_frag, and it's genuinely one of the little glue functions that makes receive-side networking happen. Pull up a chair 🎀

✨ NAME ✨

ixgbe_add_rx_frag — add the contents of an Rx buffer to sk_buff 🦋

🌸 SYNOPSIS 🌸

void ixgbe_add_rx_frag (struct ixgbe_ring *rx_ring , struct
       ixgbe_rx_buffer *rx_buffer , struct sk_buff *skb , unsigned int size );

it's giving "four arguments, no notes" 💅

⭐ ARGUMENTS ⭐

  • rx_ring — the rx descriptor ring where we're transacting packets. this is the ring, bestie, the actual one 🫶
  • rx_buffer — the buffer that's holding the page we're about to add. head empty, page full ✨
  • skb — the sk_buff we're stuffing the data into. destination: iconic 💜
  • size — how much data is actually in rx_buffer. numbers matter, no cap 📏

🦋 DESCRIPTION 🦋

so here's the vibe: this function takes the data chillin' in rx_buffer->page and adds it to the skb. simple, right? but the way it does it is lowkey the interesting part 👀

it's a two-path situation:

  • if the data in the buffer is less than the skb header size, we do a direct copy — just pick it up and move it, done 🎀
  • otherwise, we attach the page as a frag to the skb — no copying, just vibe-hosting the page directly 🌸

then the function updates the page offset if necessary, and returns true if the buffer can be reused by the adapter. recycling era ♻️✨

ngl, the synopsis says void and then the description starts talking about returning true — that's exactly what the page says, bestie, i'm just reporting the facts 💀🙈

👑 SEE ALSO 👑

the kernel file in question:

  • ./drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

and okay, the guest list is long — like, this function knows literally everyone at this point. full squad, no skips 🎊

and that's the whole page, bestie — go add some frags 💅✨

source/version vibes: ./drivers/net/ethernet/intel/i... (yes, it's literally cut off like that on the page, i'm not making it up 😭) and the date on the footer is October 2026 🗓️💖 mwah, stan this function, bye 🫶🎀

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