kernfs_get_tree(9)

📦 version 7.3.1, in nixpkgs unstable

💅 kernfs_get_tree — a Kernel API Manual moment ✨

Okay so bestie, real talk: this one lives in the kernel API manual, and it's literally the little helper that gets your kernfs filesystem accessed and retrieved. That's the whole vibe. 🎀

🌸 NAME 🌸

kernfs_get_tree — the kernfs filesystem access/retrieval helper. no cap, that's the entire job description 🫶

✨ SYNOPSIS ✨

int kernfs_get_tree (struct fs_context *fc );

🦋 ARGUMENTS 🦋

  • fc — the filesystem context. that's it, that's the argument 💖

👑 DESCRIPTION 👑

So here's the tea, bestie. You call this from each kernfs user's fs_context->ops->get_tree implementation. Yes, each one — it's giving "everybody gets a turn" energy. 🌈

And when you do call it, that implementation should:

  • set the specified ->fs_type and ->flags
  • specify the hierarchy to mount via ->root
  • specify the namespace tag to mount via ->ns

Like, respectively. ->root handles the hierarchy, ->ns handles the namespace tag. iconic division of labor, honestly 💅

⭐ RETURN ⭐

  • 0 on success 🎉
  • -errno on failure 😭

fr fr, that's the whole contract.

🧚 SEE ALSO 🧚

Kernel file ./fs/kernfs/mount.c, plus these besties:

go read them, iykyk 📚

lowkey a reminder: this page is served fresh from ./fs/kernfs, dated October 2026, and yes — kernfs_get_tree(9) is the main character of this particular manual page. periodt. 💀✨

stay slay, mount responsibly 🍓💜

📦 where this page comes from