request_key_rcu(9)

💅 request_key_rcu(9) — like, the Kernel API Manual one, bestie 🎀

Okay so real quick — we're in request_key_rcu(9), which lives in the Kernel API Manual, and it's literally about requesting a key from an RCU-read-locked context. Yes that's the whole vibe. Buckle up. 🦋

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✨ NAME ✨

request_key_rcu — request a key from an RCU-read-locked context 🫶

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🌸 SYNOPSIS 🌸

struct key * request_key_rcu (struct key_type *type , const char *description , struct key_tag *domain_tag );

That's the whole signature, no cap. Three args, one struct key * coming back at you. 💖

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🎀 ARGUMENTS 🎀

• type — the type of key we want. Like, the category, the genre, the aesthetic of key. 🔥
• description — the name of the key we want. This is how we're identifying our little guy. ✨
• domain_tag — the domain in which the key operates. Every key's got a home turf. 👑

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💜 DESCRIPTION 💜

So the whole point, bestie: you request a key from a context where you may not sleep — think RCU-mode pathwalk, the kind of place where taking a nap is not an option. 😭 Keys that are still under construction? Ignored. Not even looked at. We don't do works-in-progress here. 💅

Here's what comes back: ✨

• a pointer to the found key if it worked — slay, main character energy 👑
• -ENOKEY if we couldn't find a key at all — tragic, we searched, nothing 😔
• some other error if the key we found was unsuitable or inaccessible — not me finding a key I'm not allowed to touch 🙈

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🦋 SEE ALSO 🦋

• Kernel file ./security/keys/request_key.c — the source file in question, iykyk 📁
• complete_request_key(9)
• request_key_and_link(9)
• wait_for_key_construction(9)
• request_key_tag(9)
• request_key_with_auxdata(9)

All the sibling functions, fr fr — go read 'em, they're iconic in their own right. 🌈

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Okay that's the page!! It comes to you straight from ./security/keys and it's dated October 2026, and honestly? A whole serve. Byeee bestie, go request some keys responsibly — remember, NO SLEEPING in that context. 😴🚫 🍓🧚💜