ib_register_mad_agent(9)

🌸 NAME 🌸

ib_register_mad_agent — register to send/receive MADs. That's the whole assignment, bestie. This is the ib_register_mad_agent page from the Kernel API Manual, and it's lowkey giving "sign me up for MADs" main character energy. 💖✨

💅 SYNOPSIS 💅

okay so here's the exact signature, copy it with your whole chest:

struct ib_mad_agent * ib_register_mad_agent (struct ib_device *device ,
u32 port_num , enum ib_qp_type qp_type , struct ib_mad_reg_req
*mad_reg_req , u8 rmpp_version , ib_mad_send_handler send_handler ,
ib_mad_recv_handler recv_handler , void *context , u32
registration_flags );

🦋 ARGUMENTS 🦋

• device — the device to register with. That's your main character device, no cap.
• port_num — the port on the specified device to use. Pick the port, bestie.
• qp_type — specifies which QP to access. Vibe check: it must be either IB_QPT_SMI or IB_QPT_GSI — those are the only two choices, periodt.
• mad_reg_req — specifies which unsolicited MADs should be received by the caller. This parameter may be NULL if the caller only wishes to receive solicited responses. So if you're only here for solicited responses, NULL is allowed — iykyk.
• rmpp_version — if set, indicates that the client will send and receive MADs that contain the RMPP header for the given version. If set to 0, indicates that RMPP is not used by this client. So 0 means no RMPP for this client, fr fr.
• send_handler — the completion callback routine invoked after a send request has completed. It's the little "you're done sending" callback moment. ✨
• recv_handler — the completion callback routine invoked for a received MAD. This one handles the received-MAD callback vibes. 🎀
• context — user specified context associated with the registration. Your context, your registration, your era.
• registration_flags — registration flags to set for this agent. Set those flags and slay. 💅

🔥 SEE ALSO 🔥

okay so these are the SEE ALSO besties, and they all matter:

• Kernel file ./include/rdma/ib_mad.h
• ib_get_cpi_resp_time(9)
• ib_get_cpi_capmask2(9)
• ib_set_cpi_capmask2(9)
• opa_get_cpi_capmask2(9)
• ib_response_mad(9)
• ib_get_rmpp_resptime(9)
• ib_get_rmpp_flags(9)
• ib_set_rmpp_resptime(9)
• ib_set_rmpp_flags(9)
• ib_unregister_mad_agent(9)
• ib_post_send_mad(9)
• ib_free_recv_mad(9)
• ib_modify_mad(9)
• ib_cancel_mad(9)
• ib_create_send_mad(9)
• ib_is_mad_class_rmpp(9)
• ib_get_mad_data_offset(9)
• ib_get_rmpp_segment(9)
• ib_free_send_mad(9)
• ib_mad_kernel_rmpp_agent(9)

okay bye bestie — source/version: ./include/rdma; date: October 2026; page: ib_register_mad_agent(9). Stay iconic 💜🫶✨