rdma_leave_multicast(9)

💅 rdma_leave_multicast(9) — from the Kernel API Manual, bestie ✨

Okay so picture this: you're deep in the kernel, you've got your RDMA connection manager stuff going on, and you need to leave a multicast group. Like, you joined, it was cute, it's over now. This is that function. 🦋 It lives in <cyan>Kernel API Manual</cyan>, section 9, and it's giving very "quietly essential" energy.

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✨ NAME ✨

rdma_leave_multicast — dip out of the multicast group that the given address points at. Not me explaining the whole thing in the title, but here we are 🙈

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🌸 SYNOPSIS 🌸

void rdma_leave_multicast (struct rdma_cm_id *id , struct sockaddr *addr
);

Notice the void — she returns nothing. No status, no hint about how it went, nothing. Iconic but also terrifying, iykyk 💀

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🎀 ARGUMENTS 🎀

• id — -- undescribed -- yeah so the docs literally do not describe this one 😭 it's a struct rdma_cm_id *, that's all we get, that is the whole vibe.
• addr — -- undescribed -- also flying fully undocumented fr fr. It's a struct sockaddr * and the NAME section tells you it's the multicast group address. That's the tea 🍓

Real talk bestie: both of these are marked -- undescribed -- in the source docs. I'm not gonna sit here and invent lore for them, that would be lying to you and we don't do that 💖

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🔥 SEE ALSO 🔥

Sourced from the kernel file ./include/rdma/rdma_cm.h — and she brought her whole friend group:

rdma_create_id(9), rdma_destroy_id(9), rdma_restrict_node_type(9), rdma_bind_addr(9), rdma_resolve_addr(9), rdma_resolve_route(9), rdma_resolve_ib_service(9), rdma_create_qp(9), rdma_destroy_qp(9), rdma_init_qp_attr(9), rdma_listen(9), rdma_notify(9), rdma_reject(9), rdma_disconnect(9), rdma_join_multicast(9), rdma_set_service_type(9), rdma_set_reuseaddr(9), rdma_set_afonly(9), rdma_reject_msg(9), rdma_consumer_reject_data(9), rdma_read_gids(9)

The way rdma_join_multicast(9) is right there in the list — that's her other half, the one you call to get in before you call this one to get out. Balanced. Symmetrical. Main character energy 👑

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💜 That's the whole page, no cap 💜 Straight from ./include/rdma, dated October 2026. Slay, go leave that multicast group, I'm so proud of you 🫶🎀