iwpm_hello_cb(9)

💖 iwpm_hello_cb(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ and today's main character is iwpm_hello_cb — yes that's a section 9 kernel function, we're being so serious and academic rn 🎀

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🌸 NAME 🌸

iwpm_hello_cb — process a hello message from iwpmd 👋💌

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✨ SYNOPSIS ✨

int iwpm_hello_cb (struct sk_buff *skb , struct netlink_callback *cb );

that's the whole signature, no cap — it returns an int and takes exactly two things 🫶

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🎀 ARGUMENTS 🎀

• skb — the socket buffer 💌 literally just the socket buffer, that's the whole vibe
• cb — contains the received message, like the payload and the netlink header, both of them, together, iconic 🦋

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💅 DESCRIPTION 💅

so here's the tea 🍓 — it takes the received port mapper pid, and then it sends back the kernel's abi_version. but not before adjusting that version so it supports the iwpmd version 👑 the way that it's just a polite hello handshake but with version negotiation energy… lowkey obsessed 😭

bestie please note: it does the pid thing then the abi_version thing, in that order, keep it straight 🙈

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🌈 SEE ALSO 🌈

kernel file ./drivers/infiniband/core/iwpm_msg.c 💀 and honestly the whole friend group:

• iwpm_valid_pid(9)
• iwpm_register_pid(9)
• iwpm_add_mapping(9)
• iwpm_add_and_query_mapping(9)
• iwpm_remove_mapping(9)
• iwpm_register_pid_cb(9)
• iwpm_add_mapping_cb(9)
• iwpm_add_and_query_mapping_cb(9)
• iwpm_remote_info_cb(9)
• iwpm_mapping_info_cb(9)
• iwpm_ack_mapping_info_cb(9)
• iwpm_mapping_error_cb(9)

like literally the entire _cb squad showing up to the function party 🧚✨

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okay that's the page!! mwah 💋 this one came from ./drivers/infiniband/core, dated October 2026, and it's filed under iwpm_hello_cb(9) in the Kernel API Manual — bye bestie, go read some netlink code 💜🦋⭐