rdtgroup_kn_mode_restore(9)

📦 version 7.3.1, in nixpkgs unstable

💅 rdtgroup_kn_mode_restore — the Kernel API Manual page, but make it make sense 🎀

okay so bestie, this is rdtgroup_kn_mode_restore(9), straight out of the Kernel API Manual — it's giving "tiny function, very specific job, absolutely iconic" energy ✨

✨ NAME ✨

rdtgroup_kn_mode_restore — literally just: restore user access to a named resctrl file 🫶

🌸 SYNOPSIS 🌸

int rdtgroup_kn_mode_restore (struct rdtgroup *r , const char *name ,
umode_t mask );

that's the whole vibe. three args, one int back. no cap 💜

🦋 ARGUMENTS 🦋

  • r — the resource group that this file is hanging out with, aka its associated group 🧚
  • name — the name of the file. yes, just the name. keep it cute, keep it exact ✨
  • mask — the mask of permissions that should be restored. this is the part where you tell it which perms get their access back 💅

🌈 DESCRIPTION 🌈

so what does it actually do? it restores the permissions of the named file. that's the whole thing. main character behavior honestly 👑

but wait — plot twist 🍓 — if name is a directory, then the permissions of its parent will be used instead. not the directory's own perms. the parent's. lowkey important, highkey worth remembering 😭

⭐ RETURN ⭐

  • 0 on success 🎉 slay
  • <0 on failure 💀 not slay

🔥 SEE ALSO 🔥

bestie the friend group is large, and every single one of them is invited to this party:

Kernel file ./fs/resctrl/rdtgroup.c, plus:

like… the whole resctrl friend group fr fr 🫶 and yes rdtgroup_kn_mode_restrict(9) is right there, its chaotic sibling — one restricts, one restores, they're a matched set 💖

aaaand that's the page!! 🎀 it lives in ./fs/resctrl, it's dated October 2026, and it's part of the Kernel API Manual — so go forth, restore those perms, and remember: if it's a directory, the parent eats. periodt 💅✨🦋

📦 where this page comes from