libeth_xsk_buff_add_frag(9)

💅 libeth_xsk_buff_add_frag(9) 💅

okay bestie, welcome to the Kernel API Manual page for libeth_xsk_buff_add_frag(9) — yes that's the whole title, we're not abbreviating, we're not hiding the lore 🫶

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✨ NAME ✨

libeth_xsk_buff_add_frag — literally just adding a frag to an XSk Rx buffer, that's the whole vibe 🎀

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🌸 SYNOPSIS 🌸

struct libeth_xdp_buff * libeth_xsk_buff_add_frag (struct
libeth_xdp_buff *head , struct libeth_xdp_buff *xdp );

like, look at that signature. iconic. no notes 🔥

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🦋 ARGUMENTS 🦋

• head — the head buffer, the main character of this whole operation 👑
• xdp — the frag buffer, the little sidekick getting attached ✨

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💖 DESCRIPTION 💖

okay so listen — this is an external helper used by libeth_xsk_process_buff, and the assignment said do not call directly. like please, respect the boundary 🙈

and ngl the important part: it frees both the main and frag buffers on error. both of them. so if something goes sideways, nothing's leaking, it's handled 💅 periodt.

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⭐ RETURN ⭐

• on success you get the main buffer with the frag attached — slay 💖
• on error you get NULL, which happens when there's no space for a new frag 😭 fr fr that's the one condition

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🌈 SEE ALSO 🌈

the kernel file lives right here, go read it bestie:

./drivers/net/ethernet/intel/libeth/xsk.c

and the whole friend group of related pages:

• libeth_xsk_buff_free_slow(9)
• libeth_xsk_buff_stats_frags(9)
• __libeth_xsk_run_prog_slow(9)
• libeth_xsk_prog_exception(9)
• libeth_xskfq_create(9)
• libeth_xskfq_destroy(9)
• libeth_xsk_init_wakeup(9)
• libeth_xsk_wakeup(9)
• libeth_xsk_setup_pool(9)

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lowkey a warning tho: again, this one's an external helper for libeth_xsk_process_buff — do not call directly 💀 it does its own buffer cleanup on error and you don't wanna find out the hard way 🔥

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k that's the page!! sourced from ./drivers/net/ethernet/intel/l..., dated October 2026, and filed under libeth_xsk_buff_add_frag(9) — mwah, go forth and don't call it directly 💜🧚🍓