STRUCT GPHDR(9)

✨ struct gphdr(9) — the Kernel API Manual moment 💅

okay so bestie, we're in the Kernel API Manual today and the star of the show is struct gphdr, which literally stands for General purpose Header 🎀. it's giving humble little struct with a big job, and honestly? we love her for it.

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🌸 NAME 🌸

struct gphdr — the General purpose Header, no cap 💖

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🦋 SYNOPSIS 🦋

struct gphdr {
    __be16 param0;
    __be16 param1;
    __be16 param2;
    __be16 param3;
 };

like, four __be16 params. that's the whole vibe. short, sweet, iconic ✨

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💅 Members 💅

• param0 — the first parameter. the main character of the params, fr fr 👑
• param1 — the second parameter. showing up right after param0 like a loyal bestie 🫶
• param2 — the third parameter. lowkey just vibing in third place 🌈
• param3 — the fourth parameter. the finale, the closer, the last one in the struct 💜

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🔥 Description 🔥

not me about to explain the whole point: the params tell the iv and the enc/dec data offsets. that's it. that's the tea ☕✨ they're the little signposts pointing at where the iv lives and where the enc/dec data lives, iykyk.

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🌟 SEE ALSO 🌟

okay so this struct rolls deep — here's the entire friend group, and yes you need to know all of them:

Kernel file ./drivers/crypto/cavium/nitrox/nitrox_req.h union se_req_ctrl(9), struct se_crypto_request(9), struct crypto_keys(9), struct auth_keys(9), struct flexi_crypto_context(9), struct nitrox_aead_rctx(9), struct nitrox_rfc4106_rctx(9), union pkt_instr_hdr(9), union pkt_hdr(9), union slc_store_info(9), struct nps_pkt_instr(9), struct aqmq_command_s(9), struct ctx_hdr(9), struct nitrox_softreq(9), create_single_sg(9), create_multi_sg(9)

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bestie reminder: everything above lives under ./drivers/crypto/cavium/nitrox — that's the neighborhood, don't get lost 💀

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and that's the page!! mwah 💋 this has been struct gphdr(9) from the Kernel API Manual, brought to you by the lovely folks at ./drivers/crypto/cavium/nitrox, dated October 2026. slay, go read your headers, periodt 🎀💖✨