STRUCT BLK_CRYPTO_CONFIG(9)

✨ NAME ✨

struct blk_crypto_config — an inline encryption key's crypto configuration, bestie. This page is struct blk_crypto_config(9) from the Kernel API Manual, and it's lowkey the blueprint for how a key does its crypto thing. 💖

🌸 SYNOPSIS 🌸

       struct blk_crypto_config {
           enum blk_crypto_mode_num crypto_mode;
           unsigned int data_unit_size;
           unsigned int dun_bytes;
           enum blk_crypto_key_type key_type;
           int flags;
        };

🎀 Members 🎀

Okay so here's the member-by-member vibe check:

• crypto_mode — the encryption algorithm this key is for. That's the whole assignment. ✨
• data_unit_size — the data unit size for all encryption/decryptions with this key. It's the size in bytes of each individual plaintext and ciphertext, and it is always a power of 2. It might be, e.g., the filesystem block size or the disk sector size. Slay. 🎀
• dun_bytes — the maximum number of bytes of DUN used when using this key. No cap, just DUN bytes. 🔥
• key_type — the type of this key, bestie: either raw or hardware-wrapped. Pick your fighter. 💅
• flags — BLK_CRYPTO_CFG_* flags. The asterisk is doing a lot of work, iykyk. ⭐

🦋 SEE ALSO 🦋

Kernel file ./include/linux/blk-crypto.h, plus these iconic besties:

• struct blk_crypto_key(9)
• struct bio_crypt_ctx(9)
• blk_crypto_submit_bio(9)
• bio_crypt_clone(9)

Go read them if you want the full lore. This page is literally the config struct, not the whole saga. 🙈

Okay that's the page, bestie — source/version ./include/linux, dated October 2026, for struct blk_crypto_config(9). Bye, love you, mwah 💋🫶