rdma_ah_find_type(9)

✨ rdma_ah_find_type(9) ✨

okay so this one lives in the Kernel API Manual (yes, that manual, the big one) and it's a tiny lil function with a big job. we're talking RDMA, address handles, the whole vibe. let's get into it 🫶

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🌸 NAME 🌸

rdma_ah_find_type — literally just returns the address handle type. that's it. that's the whole thing. short and iconic 💅

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🦋 SYNOPSIS 🦋

enum rdma_ah_attr_type rdma_ah_find_type (struct ib_device *dev , u32
       port_num );

look at her go. returns an enum rdma_ah_attr_type, takes a device and a port, no cap 🎀

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🎀 ARGUMENTS 🎀

• dev — the device being checked bestie, it's the struct ib_device * you're asking about 👀
• port_num — the port number. which port? this one. the u32 one 🙈

ngl this is a two-argument function and both arguments are doing exactly what they say on the tin. no twists, no plot, just a clean little query ✨

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💜 SEE ALSO 💜

so the kernel file itself is ./include/rdma/ib_verbs.h — that's the home base, the main character energy source of this whole friend group 🧚

and then, bestie, the extended fam is large. like, unreasonably large. presenting, in the order the manual gives them:

struct rdma_stat_desc(9), struct rdma_hw_stats(9), ib_rate_to_mult(9), ib_rate_to_mbps(9), ib_port_attr_to_speed_info(9), enum ib_mr_type(9), struct ib_mr_status(9), mult_to_ib_rate(9), struct ib_udata(9), struct rdma_netdev(9), struct ib_device_ops(9), ib_get_client_data(9), ib_modify_qp_is_ok(9), rdma_cap_ib_switch(9), rdma_start_port(9), rdma_for_each_port(9), rdma_end_port(9), rdma_cap_ib_mad(9), rdma_cap_opa_mad(9), rdma_cap_ib_smi(9), rdma_cap_ib_cm(9), rdma_cap_iw_cm(9), rdma_cap_ib_sa(9), rdma_cap_ib_mcast(9), rdma_cap_af_ib(9), rdma_cap_eth_ah(9), rdma_cap_opa_ah(9), rdma_max_mad_size(9), rdma_cap_roce_gid_table(9), rdma_core_cap_opa_port(9), rdma_mtu_enum_to_int(9), rdma_mtu_from_attr(9), ib_alloc_pd(9), ib_dealloc_pd(9), rdma_create_ah(9), rdma_create_user_ah(9), ib_get_gids_from_rdma_hdr(9), ib_get_rdma_header_version(9), ib_init_ah_attr_from_wc(9), ib_create_ah_from_wc(9), rdma_modify_ah(9), rdma_query_ah(9), rdma_destroy_ah_user(9), rdma_destroy_ah(9), ib_modify_srq(9), ib_query_srq(9), ib_destroy_srq_user(9), ib_destroy_srq(9), ib_post_srq_recv(9), ib_create_qp(9), ib_modify_qp_with_udata(9), ib_modify_qp(9), ib_query_qp(9), ib_destroy_qp(9), ib_open_qp(9), ib_close_qp(9), ib_post_send(9), ib_post_recv(9), ib_alloc_cq_any(9), rdma_set_cq_moderation(9), ib_destroy_cq_user(9), ib_destroy_cq(9), ib_poll_cq(9), ib_req_notify_cq(9), ib_virt_dma_to_ptr(9), ib_virt_dma_to_page(9), ib_dma_mapping_error(9), ib_dma_map_single(9), ib_dma_unmap_single(9), ib_dma_map_page(9), ib_dma_unmap_page(9), ib_dma_map_bvec(9), ib_dma_unmap_bvec(9), ib_dma_map_sgtable_attrs(9), ib_dma_map_sg(9), ib_dma_unmap_sg(9), ib_dma_max_seg_size(9), ib_dma_sync_single_for_cpu(9), ib_dma_sync_single_for_device(9), ib_dereg_mr_user(9), ib_dereg_mr(9), ib_update_fast_reg_key(9), ib_inc_rkey(9), ib_attach_mcast(9), ib_detach_mcast(9), ib_check_mr_status(9), ib_device_try_get(9), ib_lid_cpu16(9), ib_lid_be16(9), rdma_roce_rescan_device(9), rdma_device_to_ibdev(9), ibdev_to_node(9), rdma_device_to_drv_device(9), rdma_flow_label_to_udp_sport(9), rdma_calc_flow_label(9), rdma_get_udp_sport(9)

like I said. huge. iykyk 😭💀 but every single one of them is a real page, go read 'em 🍓

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that's the whole page bestie, go forth and find those address handle types 🌈⭐

💖 sourced from ./include/rdma, dated October 2026 — mwah, kiss kiss, stay hydrated 💖