libeth_xdp_prepare_buff(9)

💅 libeth_xdp_prepare_buff — from the Kernel API Manual, bestie

Okay so real talk, this is libeth_xdp_prepare_buff(9), and it lives in the Kernel API Manual. It's the little helper that fills up your &libeth_xdp_buff with the head FQE data. Lowkey iconic, ngl. ✨

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🌸 NAME 🌸

libeth_xdp_prepare_buff — fill &libeth_xdp_buff with head FQE data 🫶

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✨ SYNOPSIS ✨

void libeth_xdp_prepare_buff (struct libeth_xdp_buff *xdp , const struct
libeth_fqe *fqe , u32 len );

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🎀 ARGUMENTS 🎀

• xdp — the XDP buffer you're attaching the head to. It's the main character here 💅
• fqe — the FQE that's carrying the head buffer. Your little payload bestie 🍓
• len — the buffer len, and it's passed from HW, so it's not yours to make up fr fr

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🦋 DESCRIPTION 🦋

So this one is internal — meaning hands off, bestie, use libeth_xdp_process_buff instead. 🙈 Not me warning you, it's literally in the page.

What it does: it initializes the XDP buffer head with all the Rx buffer data — the data pointer, the length, the headroom, and the truesize/tailroom. Then it zeroes the flags. That's it. Clean, simple, ate. 🔥

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💜 SEE ALSO 💜

Kernel file ./include/net/libeth/xdp.h, plus the whole extended universe:

• struct libeth_xdp_buff(9), __LIBETH_XDP_ONSTACK_BUFF(9), LIBETH_XDP_ONSTACK_BUFF(9)
• libeth_xdpsq_num(9), libeth_xdpsq_shared(9), libeth_xdpsq_id(9), libeth_xdpsq_get(9), libeth_xdpsq_put(9), libeth_xdpsq_lock(9), libeth_xdpsq_unlock(9), libeth_xdpsq_deinit_timer(9), libeth_xdpsq_queue_timer(9), libeth_xdpsq_run_timer(9)
• enum (anonymous)(9), enum (anonymous)(9)
• struct libeth_xdp_tx_frame(9), struct libeth_xdp_tx_bulk(9), LIBETH_XDP_ONSTACK_BULK(9), struct libeth_xdpsq(9), struct libeth_xdp_tx_desc(9)
• libeth_xdp_ptr_to_priv(9), libeth_xdp_priv_to_ptr(9)
• libeth_xdp_tx_xmit_bulk(9), libeth_xdp_tx_queue_head(9), libeth_xdp_tx_queue_frag(9), libeth_xdp_tx_queue_bulk(9), libeth_xdp_tx_fill_stats(9), libeth_xdp_tx_fill_buf(9), __libeth_xdp_tx_flush_bulk(9), libeth_xdp_tx_flush_bulk(9)
• libeth_xdp_xmit_init_bulk(9), libeth_xdp_xmit_frame_dma(9), libeth_xdp_xmit_queue_head(9), libeth_xdp_xmit_queue_frag(9), libeth_xdp_xmit_queue_bulk(9), libeth_xdp_xmit_fill_buf(9), libeth_xdp_xmit_flush_bulk(9), __libeth_xdp_xmit_do_bulk(9), libeth_xdp_xmit_do_bulk(9)
• libeth_xdp_tx_init_bulk(9), libeth_xdp_init_buff(9), libeth_xdp_save_buff(9), libeth_xdp_return_stash(9), libeth_xdp_return_buff(9), libeth_xdp_process_buff(9), libeth_xdp_buff_stats_frags(9)
• __libeth_xdp_run_prog(9), __libeth_xdp_run_flush(9), libeth_xdp_run_prog(9), __libeth_xdp_run_pass(9), libeth_xdp_run_pass(9), libeth_xdp_finalize_rx(9)
• LIBETH_XDP_DEFINE_TIMER(9), LIBETH_XDP_DEFINE_FLUSH_TX(9), LIBETH_XDP_DEFINE_FLUSH_XMIT(9), LIBETH_XDP_DEFINE_RUN_PROG(9), LIBETH_XDP_DEFINE_RUN_PASS(9), LIBETH_XDP_DEFINE_RUN(9), LIBETH_XDP_DEFINE_FINALIZE(9)
• libeth_xdp_buff_to_rq(9), libeth_xdpmo_rx_hash(9), __libeth_xdp_complete_tx(9), libeth_xdp_set_features(9), libeth_xdp_set_features_noredir(9)

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Ok that's the whole page, go be great 💖

And that's a wrap, bestie! This one comes from ./include/net/libeth, dated October 2026, and it's page libeth_xdp_prepare_buff(9) in the Kernel API Manual. Slay, go touch some Rx buffers 🌈👑