failover_register(9)

✨ failover_register(9) ✨

okay so bestie, this is a page from the Kernel API Manual and it's literally all about failover_register — one little function that spins up a whole failover instance. it's giving "small function, big responsibilities" energy, fr fr 💅

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💖 NAME 💖

failover_register — Register a failover instance 🎀

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🦋 SYNOPSIS 🦋

struct failover * failover_register (struct net_device *dev , struct failover_ops *ops );

like, you hand it a netdev and some ops, and it hands you back a struct failover *. iconic behavior honestly 🫶

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🌸 ARGUMENTS 🌸

• dev — the failover netdev 💻 the actual network device this whole failover situation is attached to.
• ops — the failover ops 🎯 your operations struct, i.e. the whole personality of this failover instance.

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👑 DESCRIPTION 👑

so what it does: it allocates and registers a failover instance for a failover netdev ✨ (yes, both — allocate, then register, no cap).

and ops? that's where you plug in your handlers. ops provides handlers for these events:

• slave device register 🌈
• slave device unregister 💀
• slave device link change 🔥
• slave device name change 🎀

like, every time one of those things happens to a slave, your handlers get to have main character energy. periodt 💅

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⭐ RETURN ⭐

it returns a pointer to the failover instance 💖 (that's your new struct failover *, bestie — go forth and use it wisely).

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🧚 SEE ALSO 🧚

• the kernel file ./net/core/failover.c 📁 — yes, the source is the documentation sometimes, iykyk 🙈
• failover_slave_register(9)
• failover_slave_unregister(9)
• failover_unregister(9)

like, read these too so you get the full picture — they're the besties of this function fr fr 🫶

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ngl, if you're here you're probably doing networking driver stuff, and that's kind of a slay. just remember: ops handlers are load-bearing. don't skimp on 'em 💜

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okay bye bestie, this page lives in ./net/core, from October 2026, and it's failover_register(9) — go register something iconic 🌟💖