rpcrdma_rn_register(9)

💖 rpcrdma_rn_register(9) 💖

okay bestie, welcome to the Kernel API Manual page for rpcrdma_rn_register(9) — yes, the whole device removal notification situation, and we're gonna make it make sense 💅✨

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✨ NAME ✨

rpcrdma_rn_register - register to get device removal notifications 🎀

🦋 SYNOPSIS 🦋

here's the signature, bestie — keep the punctuation exactly as it is, it's iconic:

       int rpcrdma_rn_register (struct ib_device *device , struct
       rpcrdma_notification *rn , void (*done)(struct rpcrdma_notification *rn)
       );

💅 ARGUMENTS 💅

• device — device to monitor 👀
• rn — notification object that wishes to be notified 🫶
• done — callback to notify caller of device removal 📣

🌸 DESCRIPTION 🌸

Returns zero on success. The callback in rn_done is guaranteed to be invoked when the device is removed, unless this notification is unregistered first. no cap ✅

On failure, a negative errno is returned. rn->rn_done is left NULL on every failure path (it is armed before xa_alloc but cleared again if xa_alloc fails), so the rn may safely be passed to rpcrdma_rn_unregister without a separate registered/unregistered flag in the caller. periodt 💅

bestie note: that NULL on every failure path is the whole safety vibe — it means the caller doesn't need its own registered/unregistered flag. 🫡

🔥 SEE ALSO 🔥

go peek at these, bestie 👑:

• Kernel file ./net/sunrpc/xprtrdma/ib_client.c
• rpcrdma_rn_unregister(9)
• rpcrdma_add_one(9)
• rpcrdma_remove_one(9)
• rpcrdma_ib_client_unregister(9)
• rpcrdma_ib_client_register(9)

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mwah 💋 this page lives under ./net/sunrpc/xprtrdma, stamped October 2026, and it's the rpcrdma_rn_register(9) manpage from the Kernel API Manual. periodt 🫶🌈