STRUCT NILFS_SEGMENT_USAGE(9)

okay so bestie, this is struct nilfs_segment_usage(9) from the Kernel API Manual, and it’s literally the segment usage struct — no cap, very main character energy ✨💅

🌸 NAME 🌸

struct nilfs_segment_usage - segment usage — yes bestie, that’s the literal NAME line, and it’s giving segment usage realness 🫶

✨ SYNOPSIS ✨

here’s the struct in all its glory — copy it exactly, we do not mess with kernel code 👑:

       struct nilfs_segment_usage {
           __le64 su_lastmod;
           __le32 su_nblocks;
           __le32 su_flags;
        };

🦋 Members 🦋

• su_lastmod — last modified timestamp, aka when this segment last got its timestamp moment ⏰✨
• su_nblocks — number of blocks in segment; literally counting the blocks, periodt 🧮💜
• su_flags — flags, the little flag field doing its flag things 🚩✨

🔥 SEE ALSO 🔥

Kernel file ./include/uapi/linux/nilfs2_ondisk.h is the file, and these are the structs/friends you should also peek at, iykyk 👀:

• 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_checkpoint(9)
  • struct nilfs_cpfile_header(9)
  • struct nilfs_sufile_header(9)

xoxo, your kernel bestie 💖 — source path ./include/uapi/linux, manual Kernel API Manual, date October 2026, page struct nilfs_segment_usage(9), and that’s the whole footer vibe 🫶✨