STRUCT INLINECRYPT_CTX(9)

💅 struct inlinecrypt_ctx(9) — like, the kernel API manual, bestie 🎀

okay so real talk, this page is all about struct inlinecrypt_ctx — aka the private data of an inlinecrypt target. it lives in the kernel API manual and honestly? it's giving backstage-pass energy. let's get into it ✨

🌸 NAME 🌸

struct inlinecrypt_ctx — the private data of an inlinecrypt target. that's it, that's the whole vibe 🫶

✨ SYNOPSIS ✨

like, here's the struct in all its glory, no cap:

struct inlinecrypt_ctx {
    struct dm_dev *dev;
    sector_t start;
    const char *cipher_string;
    unsigned int key_size;
    u64 iv_offset;
    unsigned int sector_size;
    unsigned int sector_bits;
    enum blk_crypto_key_type key_type;
    struct blk_crypto_key key;
    u64 max_dun;
 };

🦋 Members 🦋

okay now the main character energy — every single field, explained, periodt:

• dev — the underlying device. literally the whole point 💀
• start — the starting sector of the range of dev that this target actually maps. and for this purpose a "sector" is 512 bytes — write that down, it comes up again 👀
• cipher_string — the name of the encryption algorithm being used. yes bestie, name-drop it 🔥
• key_size — size of the encryption key in bytes 🎀
• iv_offset — starting offset for IVs. the IVs are generated as if the target were preceded by iv_offset 512-byte sectors. it's giving "pretend there's stuff before us" energy ✨
• sector_size — crypto sector size in bytes (usually 4096) 💖
• sector_bits — log2(sector_size). math moment, we love to see it 🧚
• key_type — type of the key — either raw or hardware-wrapped. two paths, both iconic 👑
• key — the encryption key to use. the actual key, the star of the show 💅
• max_dun — the maximum DUN that may be used (computed from other params). not me computing things from other params 😭

👑 SEE ALSO 👑

• Kernel file ./drivers/md/dm-inlinecrypt.c — go read it, iykyk 🌈

and that's the whole page, bestie 💜 sign-off time: this cutie came out of ./drivers/md and it's dated October 2026, so yeah — it's lowkey from the future fr fr. slay 🦋⭐