STRUCT NILFS_DIRECT_NODE(9)

💖 NAME 💖

struct nilfs_direct_node — the header of the built-in bmap array, bestie ✨ (it's from the Kernel API Manual, iykyk)

Okay so picture this: you've got this little struct whose whole entire job is to sit at the front of the built-in bmap array and hold the flags. That's it. That's the gig. Small but iconic, honestly 🎀

✨ SYNOPSIS ✨

struct nilfs_direct_node {
    __u8 dn_flags;
    __u8 pad[7];
 };

That's the whole thing, no cap — two members and vibes 💅

🦋 Members 🦋

• dn_flags — the flags, literally. It's a __u8, it holds flags, and it's the main character here 👑
• pad — padding. It's a __u8 array of seven, just there to fill out the space so everything lines up all cute and aligned 🌸

So yes, the padding is pad[7] — seven whole bytes of "please don't touch, I'm just here for the alignment" energy 🙈

🌈 SEE ALSO 🌈

• Kernel file ./include/uapi/linux/nilfs2_ondisk.h 👀 — this is where the struct actually lives, go look at it, fr fr
• 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_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_segment_usage(9)
• struct nilfs_sufile_header(9)

Like, that's the whole nilfs2 fam right there — go read them all, they're all slaying in their own little way 🫶

And that's the page! 🎉 Signing off from ./include/uapi/linux, dated October 2026 — stay struct-y, bestie, and remember: even a 8-byte header can have main character energy 💜💫