kernfs_break...e_protection(9)

📦 version 7.3.1, in nixpkgs unstable

💅 kernfs_break...e_protection(9) 💅

okay so bestie, welcome to the Kernel API Manual — yes the actual kernel, the big scary one, but we're gonna get through it together 🫶 this one's a little function with a whole lot of "please be careful" energy and honestly? it's giving main character.

✨ NAME ✨

kernfs_break_active_protection — break out of active protection 🎀

like, you had protection, and now you don't. we stan a queen who knows when to let go.

🦋 SYNOPSIS 🦋

void kernfs_break_active_protection (struct kernfs_node *kn );

void, no return value, no crumbs. she just does the thing and leaves 💅

🎀 ARGUMENTS 🎀

  • kn — the self kernfs_node. that's your node, your problem, your moment ✨

🌸 DESCRIPTION 🌸

Okay so here's the vibe check: the caller must be running off of a kernfs operation which is invoked with an active reference — like, for example, one of kernfs_ops. no random drive-bys, bestie, this is a members-only situation 🔥

Also — and this is the important part — each invocation of this function must also be matched with an invocation of kernfs_unbreak_active_protection. matched. like friendship bracelets. you break it, you unbreak it, periodt 🌈

So what does she actually do? This function releases the active reference of kn that the caller is holding. that's it, that's the whole job 💖

But here's the dramatic part, and I need you to hear me on this one: once this function is called, kn may be removed at any point, and the caller is solely responsible for ensuring that the objects it dereferences are accessible. solely. you. nobody else. no cap 😭

⚠️ like literally the node can vanish into thin air the second you call this and it is 100% your job to keep your dereferenced objects reachable. do not come for this function when your stuff is gone, she warned you 💀

🧚 SEE ALSO 🧚

Kernel file ./fs/kernfs/dir.c

that's the whole page, bestie, you ate that 🍓

signing off from ./fs/kernfs, dated October 2026 — mwah, go read the source, ily 💜✨

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