nilfs_palloc..._alloc_entry(9)

📦 version 7.3.1, in nixpkgs unstable

✨ nilfs_palloc_prepare_alloc_entry ✨

Okay bestie, welcome to the Kernel API Manual page for nilfs_palloc..._alloc_entry(9) — yes that's the truncated little title, she's shy 🎀 — and honestly? This one is a whole vibe: it's the "get ready to get ready" function for allocating a persistent object. Let's get into it 💅

🌸 NAME 🌸

nilfs_palloc_prepare_alloc_entry — literally just prepare to allocate a persistent object. That's the whole thing. She preps, she doesn't commit. Main character energy of setting up your outfit the night before 🫶

⭐ SYNOPSIS ⭐

int nilfs_palloc_prepare_alloc_entry (struct inode *inode , struct
nilfs_palloc_req *req , bool wrap );

That signature is giving "three args, no notes" 😌

🦋 ARGUMENTS 🦋

  • inode — the inode of the metadata file that's using this allocator. Like, whose house are we doing this in 💖
  • req — a nilfs_palloc_req structure that gets exchanged for the allocation. It's the little paper you hand over and get stamped 📝
  • wrap — a bool that says whether to wrap around. Do we loop back to the start or nah 🔄

👑 RETURN 👑

So on success you get 0 — iconic, flawless, we love a zero 💚

On failure you get one of these negative error codes, and no cap, these are exactly the ones:

  • -EIO — I/O error (including metadata corruption). Yikes 😭 the data's acting up.
  • -ENOMEM — Insufficient memory available. Girl needs RAM and got none 💀
  • -ENOSPC — Entries exhausted (No entries available for allocation). The shelf is empty fr fr 🙈
  • -EROFS — Read only filesystem. Can't write, won't write, periodt 🚫

💜 SEE ALSO 💜

Kernel file ./fs/nilfs2/alloc.c — and honestly, the whole girl gang is here, so let me introduce every single one of them, no skipping 🎀

Bestie note 🫶: -EIO here specifically covers metadata corruption too, so if you see it, don't just assume the disk had a moment — the docs say it's I/O error including metadata corruption. Handle with care 🌈

And that's the page, mwah 💋 Signing off from the Kernel API Manual, living in the ./fs/nilfs2 directory, dated October 2026 — she's a nilfs_palloc..._alloc_entry(9) girlie and she ate, fr fr 💅✨🍓

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