VCOUNT(9)

💅 VCOUNT(9) 💅

okay bestie, welcome to VCOUNT(9) from the Kernel Developer's Manual — yes it's a section 9 page, yes it's for kernel devs, yes you're gonna eat this up 🍓

✨ NAME ✨

vcount, count_dev — get total number of references to a device 🎀

🌸 SYNOPSIS 🌸

#include <sys/param.h>
#include <sys/time.h>
#include <sys/conf.h>
#include <sys/vnode.h>

int
vcount(struct vnode *vp);

int
count_dev(struct cdev *dev);

like, copy those includes exactly, they're not decorative bestie 💖

🦋 DESCRIPTION 🦋

So vcount() is the girl who counts how many references there are to one specific device. The whole reason she exists? Because multiple vnodes can reference the same device — and she's built to handle that reality, no cap. 👑

count_dev() does the exact same thing as vcount(), but instead of taking a struct vnode pointer as its argument, it takes a struct cdev. Same energy, different entry point 💅

💖 RETURN VALUES 💖

Both vcount() and count_dev() return the number of references to the device. That's it. That's the whole return value. Periodt. ✨

🌈 SEE ALSO 🌈

• VFS(9)
• vnode(9)

go read those too, iykyk 🫶

👑 AUTHORS 👑

This manual page was written by Andrew Stevenson. icon behavior, honestly 🎀

and that's the whole page bestie!! this one shipped from Debian, dated January 19, 2012 — so like, it's older than most of the internet but it still slays 💀✨ mwah, go count some device references 🦋💖