nilfs_palloc..._desc_offset(9)

📦 version 7.3.1, in nixpkgs unstable

💖 nilfs_palloc_group_desc_offset — the Kernel API Manual, bestie edition 💖

okay so this is a page from the Kernel API Manual (nilfs_palloc..._desc_offset(9)), and honestly? it's a tiny little function that does one very specific thing and does it flawlessly. main character energy, no notes. 🎀

✨ NAME ✨

nilfs_palloc_group_desc_offset — literally just calculates the byte offset of a group descriptor inside the folio that contains it. that's it. that's the whole job. and she ate. 💅

🦋 SYNOPSIS 🦋

size_t nilfs_palloc_group_desc_offset (const struct inode *inode ,
unsigned long group , const struct buffer_head *bh );

copy it exactly, bestie — every const, every *, every comma. do not freestyle. 🙈

🌸 ARGUMENTS 🌸

  • inode — the inode of the metadata file that's using this allocator. like, whose house are we in. 🏠
  • group — the group number. which group, bestie. be specific.
  • bh — the buffer head of the group descriptor block. this is the block we're poking around inside. 🫶

⭐ RETURN ⭐

returns the byte offset, in the folio, of the group descriptor for group. a number. a size_t. immaculate. ✨

👑 SEE ALSO 👑

the kernel file ./fs/nilfs2/alloc.c and honestly the entire extended friend group — all of these are part of the same allocator lore, iykyk:

thirty of them. thirty!! a whole squad. go read them, they're all slaying in their own way. 💜

and that's the page!! this little beauty lives in ./fs/nilfs2, dated October 2026, and it's filed under nilfs_palloc..._desc_offset(9) in the Kernel API Manual — mwah, bye bestie, go calculate some offsets 💋🎀🦋

📦 where this page comes from