STRUCT BBM_INFO(9)

💅 struct bbm_info(9) — the Kernel API Manual, bestie edition 🎀

okay so you're reading struct bbm_info(9) from the Kernel API Manual and honestly? iconic of you. this is the [GENERIC] Bad Block Table data structure and it's giving main character energy in the MTD world ✨

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🌸 NAME 🌸

struct bbm_info — the [GENERIC] Bad Block Table data structure, no cap 💖

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✨ SYNOPSIS ✨

struct bbm_info {
    int bbt_erase_shift;
    int options;
    uint8_t *bbt;
    int (*isbad_bbt)(struct mtd_info *mtd, loff_t ofs, int allowbbt);
    struct nand_bbt_descr *badblock_pattern;
    void *priv;
 };

like, look at her. six members. all business. 🫶

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🦋 Members 🦋

• bbt_erase_shift — [INTERN] the number of address bits in a bbt entry. yes bestie, intern as in internal, not an intern at the office 😭
• options — the options for this descriptor. literally what it says 💅
• bbt — [INTERN] the bad block table pointer. she points at the table, that's her whole job 🎀
• isbad_bbt — the function to determine if a block is bad. vibe check, but for blocks 🔥
• badblock_pattern — [REPLACEABLE] the bad block scan pattern used for initial bad block scan. yes you can swap her out, she's flexible like that 🦋
• priv — [OPTIONAL] pointer to private bbm date. optional!! lowkey mysterious!! 🙈

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👑 SEE ALSO 👑

• Kernel file ./include/linux/mtd/bbm.h
• struct nand_bbt_descr(9)

go read those too, iykyk 📚

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ngl bestie, keep the tags straight — [INTERN] means internal, [REPLACEABLE] means you can replace it, and [OPTIONAL] means it might just not be there. don't come for me if you mix them up 💀

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and that's the whole page!! mwah 💋 this little gem lives in ./include/linux/mtd, it's dated October 2026, and the whole thing is filed under struct bbm_info(9) — periodt. 🧚‍♀️⭐🍓