STRUCT LIBETH_XDP_BUFF_STASH(9)

💅 struct libeth_xdp_buff_stash(9) 💅

okay so bestie, you're reading the Kernel API Manual rn — welcome, this is the libeth corner of the kernel and we're about to make it make sense 🫶

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✨ NAME ✨

struct libeth_xdp_buff_stash — literally the struct you use for stashing an &xdp_buff onto a queue 🎀 no cap, that's the whole job.

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🌸 SYNOPSIS 🌸

struct libeth_xdp_buff_stash {
    void *data;
    u16 headroom;
    u16 len;
    u32 frame_sz:24;
    u32 flags:8;
 };

bestie look at that bitfield — frame_sz gets 24 bits and flags gets 8 bits, and they're roommates in the same u32. slay. 💅

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🦋 Members 🦋

• data — pointer to the start of the frame, i.e. xdp_buff.data. this is where the frame begins, main character energy ✨
• headroom — the frame headroom, computed as xdp_buff.data - xdp_buff.data_hard_start. it's the spare space before your data, lowkey important 🌸
• len — the frame's linear space length, i.e. xdp_buff.data_end - xdp_buff.data. the actual amount of linear frame you've got 🎀
• frame_sz — the truesize occupied by the frame, xdp_buff.frame_sz. yes it's the whole footprint, not just the payload 💖
• flags — xdp_buff.flags. the vibes check bits, faithfully carried over 🔥

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💜 Description 💜

so here's the tea ☕: xdp_buff is 56 bytes long on x64, and libeth_xdp_buff is 64 bytes. that's the size gap we're working with, bestie.

this structure carries only the necessary fields to save/restore a partially built frame on the queue structure 🫶 so you can finish building it during the next NAPI poll. that's it. that's the whole vibe. no extra luggage, just the essentials — it's giving minimalist icon 👑

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🌈 SEE ALSO 🌈

• Kernel file ./include/net/libeth/types.h
• struct libeth_rq_napi_stats(9)
• struct libeth_sq_napi_stats(9)
• struct libeth_xdpsq_napi_stats(9)
• struct libeth_xdpsq_lock(9)
• struct libeth_xdpsq_timer(9)

go read those next, they're all in the same friend group fr fr 🦋

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and that's the page!! brought to you by ./include/net/libeth, dated October 2026 — mwah, go forth and stash responsibly 💅✨🎀