STRUCT NILFS_BDESC(9)

💅 struct nilfs_bdesc(9) — Kernel API Manual 🎀

okay bestie, welcome to the struct nilfs_bdesc(9) page — it’s the Kernel API Manual moment, and we’re getting into the descriptor of a disk block number. No cap, every field is about to be named and explained. ✨

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🌸 NAME 🌸

struct nilfs_bdesc — descriptor of disk block number, periodt. 💖

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✨ SYNOPSIS ✨

Here’s the whole struct, looking all iconic in its natural habitat:

       struct nilfs_bdesc {
           __u64 bd_ino;
           __u64 bd_oblocknr;
           __u64 bd_blocknr;
           __u64 bd_offset;
           __u32 bd_level;
           __u32 bd_pad;
        };

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👑 Members 👑

One field at a time, bestie — no skipping, no summarizing, we’re doing the whole squad. 🫶

• bd_ino — inode number. 🧚
• bd_oblocknr — disk block address (for skipping dead blocks). 💀
• bd_blocknr — disk block address. 🔥
• bd_offset — logical block offset inside a file. 📁
• bd_level — level in the b-tree organization. 🌳
• bd_pad — padding. 🎀

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🔥 SEE ALSO 🔥

Kernel file ./include/uapi/linux/nilfs2_api.h is right there in the mix, and these structs are the rest of the crew:

• struct nilfs_cpinfo(9)
• struct nilfs_suinfo(9)
• struct nilfs_suinfo_update(9)
• struct nilfs_cpmode(9)
• struct nilfs_argv(9)
• struct nilfs_period(9)
• struct nilfs_cpstat(9)
• struct nilfs_sustat(9)
• struct nilfs_vinfo(9)
• struct nilfs_vdesc(9)

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cute sign-off time: source/version is ./include/uapi/linux, date is October 2026, and this whole page is still struct nilfs_bdesc(9) — slay, bye bestie! 💜🦋