STRUCT NILFS_INODE_INFO(9)

💖 struct nilfs_inode_info(9) 💖

okay so this is from the Kernel API Manual and it's literally the whole entire struct nilfs_inode_info — the in-memory inode data for nilfs. yes bestie, we're going in the kernel today 🫶

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✨ NAME ✨

struct nilfs_inode_info — nilfs inode data in memory 💾

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🌸 SYNOPSIS 🌸

struct nilfs_inode_info {
    __u32 i_flags;
    unsigned int i_state;
    unsigned long  i_state;
    struct nilfs_bmap *i_bmap;
    struct nilfs_bmap i_bmap_data;
    __u64 i_xattr;
    __u32 i_dir_start_lookup;
    __u64 i_cno;
    struct inode *i_assoc_inode;
    struct list_head i_dirty;
  #ifdef CONFIG_NILFS_XATTR;
    struct rw_semaphore xattr_sem;
  #endif;
    struct buffer_head *i_bh;
    struct nilfs_root *i_root;
    struct inode vfs_inode;
 };

wait, the real one is below, don't copy the mess above — actual verbatim struct coming at you 👇

struct nilfs_inode_info {
    __u32 i_flags;
    unsigned int i_type;
    unsigned long  i_state;
    struct nilfs_bmap *i_bmap;
    struct nilfs_bmap i_bmap_data;
    __u64 i_xattr;
    __u32 i_dir_start_lookup;
    __u64 i_cno;
    struct inode *i_assoc_inode;
    struct list_head i_dirty;
  #ifdef CONFIG_NILFS_XATTR;
    struct rw_semaphore xattr_sem;
  #endif;
    struct buffer_head *i_bh;
    struct nilfs_root *i_root;
    struct inode vfs_inode;
 };

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🎀 Members 🎀

like a tour of every single field, no skips, we're doing all of them 💅

• i_flags — inode flags ✨
• i_type — inode type (a combo of flags that indicate usage) 🔥
• i_state — dynamic state flags ✨
• i_bmap — pointer on i_bmap_data 👀
• i_bmap_data — the raw block mapping 🗺️
• i_xattr — <TODO> 😭 (yep, that's genuinely what the docs say, bestie — it's giving unfinished homework)
• i_dir_start_lookup — page index of the last successful search 🔍
• i_cno — checkpoint number for GC inode 🧚
• i_assoc_inode — associated inode (B-tree node cache holder or back pointer) 🦋
• i_dirty — list for connecting dirty files 💀
• xattr_sem — semaphore for extended attributes processing 🔒 (only there when CONFIG_NILFS_XATTR is set, iykyk)
• i_bh — buffer contains disk inode 📦
• i_root — root object of the current filesystem tree 🌳
• vfs_inode — VFS inode object 👑

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🌈 SEE ALSO 🌈

• Kernel file ./fs/nilfs2/nilfs.h
• NILFS_MAX_VOLUME_NAME(9)
• struct nilfs_transaction_info(9)

periodt, that's the whole page, go read the header file if you want more tea ☕

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and that's a wrap, bestie! 🎀 this one lives in ./fs/nilfs2, dated October 2026, and it's literally titled struct nilfs_inode_info(9) — slay, go forth and read your inodes 💖✨👑