nilfs_ioctl_free_vblocknrs(9)

📦 version 7.3.1, in nixpkgs unstable

💅 nilfs_ioctl_free_vblocknrs — free virtual block numbers ✨

okay so this is a page straight out of the Kernel API Manual (section 9, bestie — kernel developer vibes only), and it's about one little function that does one little job and honestly? it ate. let's get into it 🫶

🌸 NAME 🌸

nilfs_ioctl_free_vblocknrs — literally just freeing virtual block numbers. that's the whole thing. iconic, concise, no notes 💅

✨ SYNOPSIS ✨

int nilfs_ioctl_free_vblocknrs (struct the_nilfs *nilfs , struct
nilfs_argv *argv , void *buf );

three args, one int coming back at you. that's it. that's the function. 🎀

🦋 ARGUMENTS 🦋

  • nilfs — the nilfs object itself. the main character of this whole operation, fr fr 👑
  • argv — the vector of arguments that came all the way from userspace. it's giving "i was sent here with a mission" energy ✨
  • buf — an array of virtual block numbers. these are the ones about to get freed. bye besties 💜

🌈 DESCRIPTION 🌈

so what does nilfs_ioctl_free_vblocknrs actually do? it frees the virtual block numbers that you specified in buf and argv->v_nmembs. that's the tea. it takes your list, it takes your count, it frees them. lowkey elegant, highkey useful 🧚

ngl the whole function is basically one sentence of behaviour — which, honestly? slay. a function that knows exactly what it is 💖

⭐ RETURN ⭐

on success you get the number of processed virtual block numbers back. like, it tells you how many it handled. periodt 💅

but if it fails? you get one of these negative error codes, and you should absolutely pay attention to which one:

  • -EIO — I/O error. the disk said "nope" 😭
  • -ENOENT — unallocated virtual block number. you asked it to free something that wasn't allocated, bestie 🙈
  • -ENOMEM — insufficient memory available. the RAM situation is not giving 🔥💀

🔥 SEE ALSO 🔥

the source lives in the kernel file ./fs/nilfs2/ioctl.c, and it has so many siblings — like, this function has a whole extended friend group, and we're listing every single one because we don't skip people here 🫶

so yeah, that's the page 💖 it comes to you from ./fs/nilfs2, dated October 2026, and it's nilfs_ioctl_free_vblocknrs(9) forever and always. go free those virtual block numbers, bestie — you've got this 🌟🎀

📦 where this page comes from