STRUCT CCP_PASSTHRU_ENGINE(9)

💅 struct ccp_passthru_engine(9) 💅

okay so bestie, welcome to the Kernel API Manual ✨ — yes we're literally in the kernel now, and this page is all about struct ccp_passthru_engine, which is the CCP pass-through operation. it's giving "glow-up for your data" energy 🦋

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✨ NAME ✨

struct ccp_passthru_engine — the CCP pass-through operation, aka the lil struct that says "hey, run this data through, do a bitsy thing to it, and hand it back" 💫

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🌸 SYNOPSIS 🌸

struct ccp_passthru_engine {
    enum ccp_passthru_bitwise bit_mod;
    enum ccp_passthru_byteswap byte_swap;
    struct scatterlist *mask;
    u32 mask_len;
    struct scatterlist *src, *dst;
    u64 src_len;
    u32 final;
 };

like, that's the whole vibe right there. no cap, every field matters 🔥

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🎀 Members 🎀

• bit_mod — the bitwise operation to perform. yes, we're doing bit math, and we're doing it fabulously 💅
• byte_swap — the byteswap operation to perform. for when your bytes need to switch places, main character style 🔄
• mask — the mask to be applied to data. it's literally a mask, so it covers stuff 🎭
• mask_len — length in bytes of mask. gotta know your size, always 📏
• src — data to be used for this operation. the input, the source material, the moment before the glow-up ✨
• dst — data produced by this operation. the after pic 🫶
• src_len — length in bytes of data used for this operation. again: size matters, know it 🍓
• final — indicate final pass-through operation. the grand finale, the last number, the closing track 🎬

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🦋 Description 🦋

so here's the tea ☕ — these are the variables that are required to be set when you call ccp_enqueue_cmd:

• bit_mod, byte_swap, src, dst, src_len
• mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP

lowkey important: that second bullet is conditional, bestie. if bit_mod is CCP_PASSTHRU_BITWISE_NOOP, you don't need mask and mask_len. but otherwise? you absolutely do. read the conditions, don't skip them 😭

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💜 SEE ALSO 💜

Kernel file ./include/linux/ccp.h — and then a whole squad of friends, fr fr:

• ccp_present(9)
• ccp_version(9)
• ccp_enqueue_cmd(9)
• struct ccp_aes_engine(9)
• struct ccp_xts_aes_engine(9)
• struct ccp_sha_engine(9)
• struct ccp_des3_engine(9)
• struct ccp_rsa_engine(9)
• struct ccp_passthru_nomap_engine(9)
• struct ccp_ecc_modular_math(9)
• struct ccp_ecc_point(9)
• struct ccp_ecc_point_math(9)
• struct ccp_ecc_engine(9)
• struct ccp_cmd(9)

like, the whole friend group showed up to the function 👑🌈

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and that's the page!! 🎀 this lil beauty lives over in ./include/linux, dated October 2026, and it's brought to you by the Kernel API Manual. go forth and pass through, bestie — periodt 💅💖