kernfs_get_open_node(9)

💅 kernfs_get_open_node 💅

Ok so bestie, welcome to kernfs_get_open_node(9) from the Kernel API Manual — yes that's the whole function name, yes it's a mouthful, no we don't shorten it, iykyk 🎀

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✨ NAME ✨

kernfs_get_open_node — get or create kernfs_open_node 🦋

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✨ SYNOPSIS ✨

int kernfs_get_open_node (struct kernfs_node *kn , struct kernfs_open_file *of );

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✨ ARGUMENTS ✨

• kn — the target kernfs_node, like, the one you're actually here for 🌸
• of — the kernfs_open_file for this instance of open. one per open, no sharing, periodt 💅

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✨ DESCRIPTION ✨

Okay so here's the tea ☕: if kn->attr.open already exists? iconic, we just increment its reference count. but if it does not exist yet? we create one. main character energy, honestly 👑

And of gets chained to the files list. that's it, that's the whole vibe 🫶

Locking: Kernel thread context — may sleep 😴. so like, don't do this somewhere that can't nap, fr fr.

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✨ RETURN ✨

• 0 on success 🎉 slay
• -errno on failure 😭 (negative errno, not a mysterious vibes-based number)

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✨ SEE ALSO ✨

• Kernel file ./fs/kernfs/file.c
• of_on(9)
• kernfs_deref_open_node_locked(9)
• kernfs_unlink_open_file(9)
• kernfs_notify(9)
• __kernfs_create_file(9)

go read those next bestie, it's giving "required reading" 📚✨

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kiss kiss, this page came from ./fs/kernfs and it's dated October 2026 — see u in the next man page, love u bye 💖🌟💅