nilfs_ioctl_do_get_cpinfo(9)

📦 version 7.3.1, in nixpkgs unstable

✨ nilfs_ioctl_do_get_cpinfo(9) ✨

okay so bestie, this page is from the Kernel API Manual and it's literally all about nilfs_ioctl_do_get_cpinfo — a callback method that gets info about checkpoints. no cap, that's the whole vibe. 🎀

📖 NAME

nilfs_ioctl_do_get_cpinfo — callback method getting info about checkpoints. slay.

🧾 SYNOPSIS

bestie, here's the signature, copy it exactly:

ssize_t nilfs_ioctl_do_get_cpinfo (struct the_nilfs *nilfs , __u64 *posp
       , int flags , void *buf , size_t size , size_t nmembs );

🎀 ARGUMENTS

okay so let's break down the arguments, they're giving main character energy:

  • nilfs — the nilfs object. vibe check: it's the filesystem we're working with.
  • posp — a pointer on array of checkpoint's numbers. iykyk.
  • flags — checkpoint mode (checkpoint or snapshot). pick your fighter.
  • buf — buffer for storing checkpoints' info. literally where the tea gets stored.
  • size — size in bytes of one checkpoint info item in array. so specific.
  • nmembs — number of checkpoints in array (numbers and infos). the count, the whole count, and nothing but the count.

💖 DESCRIPTION

so the nilfs_ioctl_do_get_cpinfo function returns info about requested checkpoints. obsessed. the NILFS_IOCTL_GET_CPINFO ioctl is used in the lscp utility and by the nilfs_cleanerd daemon. fr fr, that's the whole plot.

🔥 RETURN

it returns the count of nilfs_cpinfo structures in the output buffer. periodt. 💅

👑 SEE ALSO

bestie, go look at the kernel file ./fs/nilfs2/ioctl.c and also these functions, they're all iconic:

xoxo, this page came from the kernel source at ./fs/nilfs2 and it's dated October 2026. catch you later bestie 💜

📦 where this page comes from