STRUCT NILFS_ROOT(9)

💖 struct nilfs_root(9) 💖

okay so this is a page from the Kernel API Manual bestie, and we're talking about struct nilfs_root — the nilfs root object itself, no cap. it's giving "the main character struct" energy for real 🌸

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✨ NAME ✨

struct nilfs_root — the nilfs root object 🎀

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🦋 SYNOPSIS 🦋

struct nilfs_root {
    __u64 cno;
    struct rb_node rb_node;
    refcount_t count;
    struct the_nilfs *nilfs;
    struct inode *ifile;
    atomic64_t inodes_count;
    atomic64_t blocks_count;
    struct kobject snapshot_kobj;
    struct completion snapshot_kobj_unregister;
 };

literally the whole struct, copy-pasted exactly, don't @ me 💅

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👑 Members 👑

okay so here's the breakdown of every single field, and yes we're doing all of them 🫶

• cno — the checkpoint number ✨
• rb_node — the red-black tree node 🌈
• count — the refcount of this structure. it's counting how many people are holding onto it, very "how many besties are in the group chat" of it 💀
• nilfs — the nilfs object 🌸
• ifile — the inode file 🦋
• inodes_count — the number of inodes, and it's an atomic64_t so she's thread-safe and thriving ⭐
• blocks_count — the number of blocks, also atomic64_t, also iconic 💜
• snapshot_kobj — lives at /sys/fs/<nilfs>/<device>/mounted_snapshots/<snapshot>, which is lowkey a whole address, honestly obsessed 🎀
• snapshot_kobj_unregister — the completion state for the kernel object 🧚

not me listing every single member because the rule is we keep ALL the details and we do not skip the "boring" ones, periodt 💅

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🔥 SEE ALSO 🔥

• Kernel file ./fs/nilfs2/the_nilfs.h
• struct the_nilfs(9)

go read those too, iykyk 👑

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and that's the whole vibe check bestie 💖 this page came from ./fs/nilfs2 and it's dated October 2026 — slay, see you in the kernel source, mwah 🎀✨

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