STRUCT NILFS_CHECKPOINT(9)

💖 struct nilfs_checkpoint(9) — the checkpoint glow-up 💖

okay so bestie, welcome to the struct nilfs_checkpoint page 💅 this is from the Kernel API Manual, and it's literally the checkpoint structure — the lil record that says "hey, the filesystem was looking like this at this moment" ✨

---

🎀 NAME 🎀

struct nilfs_checkpoint — checkpoint structure. that's it, that's the vibe 🫶

---

✨ SYNOPSIS ✨

here's the whole struct, copy-paste exact, no cap:

struct nilfs_checkpoint {
    __le32 cp_flags;
    __le32 cp_checkpoints_count;
    struct nilfs_snapshot_list cp_snapshot_list;
    __le64 cp_cno;
    __le64 cp_create;
    __le64 cp_nblk_inc;
    __le64 cp_inodes_count;
    __le64 cp_blocks_count;
    struct nilfs_inode cp_ifile_inode;
 };

look at her. so organized. main character energy, fr fr 👑

---

🌸 Members 🌸

time for the member-by-member vibe check, one at a time, nobody gets skipped 💖

• cp_flags — the flags. yes bestie, flags ✨
• cp_checkpoints_count — checkpoints count in a block. lowkey important.
• cp_snapshot_list — the snapshot list 🦋
• cp_cno — checkpoint number. the cno. iconic.
• cp_create — creation timestamp ⭐ (when she was born)
• cp_nblk_inc — number of blocks incremented by this checkpoint 📈
• cp_inodes_count — inodes count
• cp_blocks_count — blocks count
• cp_ifile_inode — inode of ifile 💜

ngl, cp_flags and cp_inodes_count are described pretty minimally up there — that's exactly how the original rolls, so i'm not gonna invent lore. keeping it honest 🙈

---

🌈 SEE ALSO 🌈

go read these too, bestie, it's giving required reading 📚 and they're all in the Kernel file ./include/uapi/linux/nilfs2_ondisk.h:

• struct nilfs_inode(9)
• struct nilfs_super_root(9)
• struct nilfs_super_block(9)
• struct nilfs_finfo(9)
• struct nilfs_binfo_v(9)
• struct nilfs_binfo_dat(9)
• union nilfs_binfo(9)
• struct nilfs_segment_summary(9)
• struct nilfs_btree_node(9)
• struct nilfs_direct_node(9)
• struct nilfs_palloc_group_desc(9)
• struct nilfs_dat_entry(9)
• struct nilfs_snapshot_list(9)
• struct nilfs_cpfile_header(9)
• struct nilfs_segment_usage(9)
• struct nilfs_sufile_header(9)

---

and that's the whole page!! 💅✨🎀 this bb lives over at ./include/uapi/linux, dated October 2026, and she's filed under struct nilfs_checkpoint(9) — mwah, go slay your kernel hackery bestie 🫶💖🔥