copy_frags(9)

💅 copy_frags(9) — like, the whole vibe

Okay bestie, so this one lives in the Kernel API Manual (yes, that manual, the iconic one), and honestly? It's a little function with a big job. Let me put you on. 🫶

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✨ NAME ✨

copy_frags — copy fragments from a gather list into skb_shared_info. That's it, that's the whole personality. 🎀

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🌸 SYNOPSIS 🌸

void copy_frags (struct sk_buff *skb , const struct pkt_gl *gl ,
unsigned int offset );

Returns void, because sometimes you just do the thing and don't need a receipt. 💅

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🦋 ARGUMENTS 🦋

• skb — the destination skb, aka where all the fragments are moving to. Main character energy.
• gl — the source internal packet gather list. It's the one holding all the frags, bestie.
• offset — packet start offset in the first page. Like, where in page one the packet actually begins. Don't lose it. 🙈

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🔥 DESCRIPTION 🔥

So what it does is: it copies an internal packet gather list into a Linux skb_shared_info structure. That's the whole description, no cap. Literally copy frags → skb_shared_info. Short, sweet, slays. ✨

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👑 SEE ALSO 👑

The kernel file is ./drivers/net/ethernet/chelsio/cxgb4vf/sge.c — go read it if you're feeling brave, iykyk. 🧚

And here's the whole friend group, all of them, in order:

• get_buf_addr(9), is_buf_mapped(9), need_skb_unmap(9), txq_avail(9), fl_cap(9), fl_starving(9), map_skb(9), free_tx_desc(9), reclaim_completed_tx(9), get_buf_size(9), free_rx_bufs(9), unmap_rx_buf(9), ring_fl_db(9), set_rx_sw_desc(9), refill_fl(9), alloc_ring(9), sgl_len(9), flits_to_desc(9), is_eth_imm(9), calc_tx_flits(9), write_sgl(9), ring_tx_db(9), inline_tx_skb(9), t4vf_eth_xmit(9), t4vf_pktgl_to_skb(9), t4vf_pktgl_free(9), do_gro(9), t4vf_ethrx_handler(9), is_new_response(9), restore_rx_bufs(9), rspq_next(9), process_responses(9), napi_rx_handler(9), t4vf_intr_handler(9), sge_rx_timer_cb(9), sge_tx_timer_cb(9), bar2_address(9), t4vf_sge_alloc_rxq(9), t4vf_sge_alloc_eth_txq(9), t4vf_free_sge_resources(9), t4vf_sge_start(9), t4vf_sge_stop(9), t4vf_sge_init(9)

That's forty-two references, and yes I counted, and yes I'm obsessed with all of them. 🌈

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💀 Real talk though: everything above is exactly what the page says. I'm not out here inventing extra behaviour for the plot, bestie — no guessing, no extra lore. 🍓

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Okay that's the page!! It shipped out of ./drivers/net/ethernet/chelsio... in October 2026, and your girl is signing off — mwah, go copy some frags, you've got this 💖💜🎀