rdma_join_multicast(9)

💖 NAME 💖

rdma_join_multicast is here to join the multicast group specified by the given address. Hiii bestie, welcome to the rdma_join_multicast(9) page from the Kernel API Manual — it's giving kernel-core, no cap. 💅

🌸 SYNOPSIS 🌸

okay so the whole signature is literally this:

int rdma_join_multicast (struct rdma_cm_id *id , struct sockaddr *addr ,
       u8 join_state , void *context );

🎀 ARGUMENTS 🎀

• id — the communication identifier tied to this request. It's basically the VIP pass for the join, bestie. ✨
• addr — the multicast address that identifies the group you're joining. This is the group-chat invite, fr fr. 🫶
• join_state — the multicast JoinState bitmap requested by the port. This bitmap is based on IB_SA_MCMEMBER_REC_JOIN_STATE bits, periodt. 🎀
• context — your user-defined context associated with the join request. It gets returned to you through the private_data pointer in multicast events. Iconic. 💫

🦋 SEE ALSO 🦋

the related-reference squad is:

• Kernel file: ./include/rdma/rdma_cm.h
• 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_leave_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)

xoxo bestie 💋 this is the rdma_join_multicast(9) page from ./include/rdma, dated October 2026 — now go join that group like the main character you are 🫶✨