nilfs_ioctl...e_checkpoint(9)

📦 version 7.3.1, in nixpkgs unstable

💅 nilfs_ioctl_delete_checkpoint(9) — the delete-a-checkpoint one ✨

okay so this is from the Kernel API Manual, bestie — like, kernel-internals-level lore, not your average man ls situation 🎀

🌸 NAME 🌸

nilfs_ioctl_delete_checkpoint — literally just removes a checkpoint, that's the whole gig 💖

✨ SYNOPSIS ✨

int nilfs_ioctl_delete_checkpoint (struct inode *inode , struct file
*filp , unsigned int cmd , void __user *argp );

like, four things go in, an int comes out, iconic behaviour honestly 🫶

🦋 ARGUMENTS 🦋

  • inode — the inode object, yeah, that one 👑
  • filp — the file object, she's here too 💅
  • cmd — the ioctl's request code, this is the "which thing am I doing" number 🔥
  • argp — a pointer on argument from userspace, so like, whatever the userspace bestie handed over 🙈

💜 DESCRIPTION 💜

okay so <pink>nilfs_ioctl_delete_checkpoint</pink> removes a checkpoint from a NILFS2 file system. that's it, that's the mission 🌈

and the tea: this ioctl is used in the rmcp utility — so somewhere out there rmcp is out here living its life calling this thing 🍓

⭐ RETURN ⭐

0 on success!! slay 🎉

or one of these negative error codes when it's NOT slaying, and you WILL know which one:

  • -EFAULT — Failure during checkpoint removing 💀 like the removal itself went sideways
  • -EPERM — Operation not permitted 🙈 you're not allowed, sorry bestie
ngl if you get -EPERM that's a permissions vibe check failing, and if you get -EFAULT the checkpoint removing is the thing that broke. both valid, both rude 😭

🔮 SEE ALSO 🔮

Kernel file ./fs/nilfs2/ioctl.c — and then the entire friend group, no cap, here's the full roster 👑

like yes that's a lot of siblings, she's from a big family, main character energy regardless 💖✨

mwah, that's the whole page 🫶 this little number lives in ./fs/nilfs2 and it's dated October 2026 — see u in the next kernel cycle bestie, don't forget to un-checkpoint responsibly 💅🎀

📦 where this page comes from