STRUCT NILFS_CPINFO(9)

✨ struct nilfs_cpinfo(9) ✨

okay so this is from the Kernel API Manual, and bestie, we are about to get so cozy with one little struct 💅

---

💖 NAME 💖

struct nilfs_cpinfo — checkpoint information 🎀

like, it's the little info card for a checkpoint. that's it. that's the vibe.

---

🌈 SYNOPSIS 🌈

struct nilfs_cpinfo {
    __u32 ci_flags;
    __u32 ci_pad;
    __u64 ci_cno;
    __u64 ci_create;
    __u64 ci_nblk_inc;
    __u64 ci_inodes_count;
    __u64 ci_blocks_count;
    __u64 ci_next;
 };

no cap, that's the whole shape of it. two lil __u32s up top, then a whole stack of __u64s doing the heavy lifting 🫶

---

🦋 Members 🦋

• ci_flags — flags ✨ (yes bestie, it's flags. the flaggiest. iykyk)
• ci_pad — padding 🌸 (filler, but make it structural)
• ci_cno — checkpoint number 🔥
• ci_create — creation timestamp ⭐ (when it was born, basically)
• ci_nblk_inc — number of blocks incremented by this checkpoint 👑
• ci_inodes_count — inodes count 💜
• ci_blocks_count — blocks count 🎀
• ci_next — next checkpoint number in snapshot list 🧚 (the chain continues, fr fr)

---

🌟 SEE ALSO 🌟

Kernel file ./include/uapi/linux/nilfs2_api.h — and the whole friend group shows up too:

• 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)
• struct nilfs_bdesc(9)

💀 real talk: if you're poking around here, go read those too — they're all literally in the same header and they're all lowkey obsessed with each other.

---

and that's the whole page, bestie 🍓 mwah 💋 this came out of ./include/uapi/linux, stamped October 2026, and signed off as struct nilfs_cpinfo(9) — periodt 💅✨