libeth_xsk_prog_exception(9)

💅 libeth_xsk_prog_exception(9) — hi bestie, welcome to the Kernel API Manual 🎀

okay so real talk, you're looking at libeth_xsk_prog_exception, page 9 of the Kernel API Manual. she's a helper, she's internal, and she's about to handle some XDP prog exceptions on XSk. let's get into it 💖

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✨ NAME ✨

libeth_xsk_prog_exception — the girl who handles XDP prog exceptions on XSk 🦋

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🌸 SYNOPSIS 🌸

u32 __cold libeth_xsk_prog_exception (struct libeth_xdp_buff *xdp , enum
xdp_action act , int ret );

__cold is right there in the signature bestie — this is not the hot path, she's the slow-path cleanup queen 💅

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🎀 ARGUMENTS 🎀

• xdp — the buffer we're processing. the main character of this function ngl 🫶
• act — the verdict that got returned by the prog. like the prog's final answer ✨
• ret — the error code, if XDP_REDIRECT failed 😭

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💜 DESCRIPTION 💜

okay so first thing: Internal. say it with me. this is not a public API, she's for the kernel's own use 🙈

what she does: frees the buffer. that's the whole vibe.

and additionally — if the queue uses XSk wakeups, she stops the current NAPI poll when there are no free buffers left. no buffers? no poll. simple as that 💀

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🌈 RETURN 🌈

she returns libeth_xdp's XDP prog verdict. that's it, that's the return value 👑

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🧚 SEE ALSO 🧚

• Kernel file ./drivers/net/ethernet/intel/libeth/xsk.c — go read the source bestie, iykyk 📖
• libeth_xsk_buff_free_slow(9)
• libeth_xsk_buff_add_frag(9)
• libeth_xsk_buff_stats_frags(9)
• __libeth_xsk_run_prog_slow(9)
• libeth_xskfq_create(9)
• libeth_xskfq_destroy(9)
• libeth_xsk_init_wakeup(9)
• libeth_xsk_wakeup(9)
• libeth_xsk_setup_pool(9)

like, the whole xsk friend group fr fr 🫶✨

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and that's the page!! 💖 she's from October 2026, the source/version line lives over at ./drivers/net/ethernet/intel/l... (yes it's truncated in the original, don't come for me 😭), and she signs off as libeth_xsk_prog_exception(9) — periodt. 💅🎀