irdma_ipv4_is_lpb(9)

💖 irdma_ipv4_is_lpb(9) — a Kernel API Manual moment 💖

okay so real talk, this is a page from the Kernel API Manual, and the star of the show is irdma_ipv4_is_lpb — literally the vibe-check function of the irdma connection manager. babe, it answers one question and one question only: is this loopback? ✨

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🌸 NAME 🌸

irdma_ipv4_is_lpb — check if loopback 🫶

that's it. that's the whole job. she's a specialist, not a generalist. 💅

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🦋 SYNOPSIS 🦋

bool irdma_ipv4_is_lpb (u32 loc_addr , u32 rem_addr );

it gives you back a bool, bestie — so like, true or false, no essay required. 🎀

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👑 ARGUMENTS 👑

• loc_addr — the local addr to compare. this is the "me" in the conversation 💁‍♀️ typed as a u32.
• rem_addr — the remote address, aka the "you" in the conversation, also a u32. 🫶

lowkey iconic that it takes exactly two things and asks zero follow-up questions. no cap. 🔥

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🌈 SEE ALSO 🌈

the whole group chat, fr fr — and yeah, this list lives in the Kernel file ./drivers/infiniband/hw/irdma/cm.c, so that's where you go if you wanna read the source and feel something. 😭

• irdma_free_sqbuf(9)
• irdma_record_ird_ord(9)
• irdma_copy_ip_ntohl(9)
• irdma_copy_ip_htonl(9)
• irdma_get_addr_info(9)
• irdma_fill_sockaddr4(9)
• irdma_fill_sockaddr6(9)
• irdma_get_cmevent_info(9)
• irdma_send_cm_event(9)
• irdma_timer_list_prep(9)
• irdma_create_event(9)
• irdma_free_retrans_entry(9)
• irdma_cleanup_retrans_entry(9)
• irdma_form_ah_cm_frame(9)
• irdma_form_uda_cm_frame(9)
• irdma_send_reset(9)
• irdma_active_open_err(9)
• irdma_passive_open_err(9)
• irdma_event_connect_error(9)
• irdma_process_options(9)
• irdma_handle_tcp_options(9)
• irdma_build_mpa_v1(9)
• irdma_build_mpa_v2(9)
• irdma_cm_build_mpa_frame(9)
• irdma_send_mpa_request(9)
• irdma_send_mpa_reject(9)
• irdma_negotiate_mpa_v2_ird_ord(9)
• irdma_parse_mpa(9)
• irdma_schedule_cm_timer(9)
• irdma_retrans_expired(9)
• irdma_handle_close_entry(9)
• irdma_cm_timer_tick(9)
• irdma_send_syn(9)
• irdma_send_ack(9)
• irdma_send_fin(9)
• irdma_find_listener(9)
• irdma_del_multiple_qhash(9)
• irdma_get_vlan_mac_ipv6(9)
• irdma_get_vlan_ipv4(9)
• irdma_add_mqh_6(9)
• irdma_add_mqh_4(9)
• irdma_add_mqh(9)
• irdma_reset_list_prep(9)
• irdma_dec_refcnt_listen(9)
• irdma_cm_del_listen(9)
• irdma_addr_resolve_neigh(9)
• irdma_get_dst_ipv6(9)
• irdma_addr_resolve_neigh_ipv6(9)
• irdma_find_node(9)
• irdma_add_hte_node(9)
• irdma_ipv6_is_lpb(9)
• irdma_cm_create_ah(9)
• irdma_cm_free_ah(9)
• irdma_make_cm_node(9)
• irdma_rem_ref_cm_node(9)
• irdma_handle_fin_pkt(9)
• irdma_handle_rst_pkt(9)
• irdma_handle_rcv_mpa(9)
• irdma_check_syn(9)
• irdma_check_seq(9)
• irdma_handle_syn_pkt(9)
• irdma_handle_synack_pkt(9)
• irdma_handle_ack_pkt(9)
• irdma_process_pkt(9)
• irdma_make_listen_node(9)
• irdma_create_cm_node(9)
• irdma_cm_reject(9)
• irdma_cm_close(9)
• irdma_receive_ilq(9)
• irdma_setup_cm_core(9)
• irdma_cleanup_cm_core(9)
• irdma_init_tcp_ctx(9)
• irdma_cm_init_tsa_conn(9)
• irdma_cm_disconn(9)
• irdma_qp_disconnect(9)
• irdma_cm_disconn_true(9)
• irdma_disconnect_worker(9)
• irdma_free_lsmm_rsrc(9)
• irdma_accept(9)
• irdma_reject(9)
• irdma_connect(9)
• irdma_create_listen(9)
• irdma_destroy_listen(9)
• irdma_teardown_list_prep(9)
• irdma_cm_event_connected(9)
• irdma_cm_event_reset(9)
• irdma_cm_event_handler(9)
• irdma_cm_post_event(9)
• irdma_cm_teardown_connections(9)
• irdma_qhash_ctrl(9)
• irdma_if_notify(9)

like, that is a friend group. 90ish functions all living in the same CM file, all cheering each other on. 🧚💜

ngl if you're here for irdma_ipv4_is_lpb specifically, she's the lowkey one in the corner who still shows up to every hangout. main character energy, honestly. 👑

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okay so that's the whole page!! short and sweet, just like she is. 🍓

and now the cute sign-off: this lil beauty comes from the kernel source tree at ./drivers/infiniband/hw/irdma, dated October 2026, and it's page irdma_ipv4_is_lpb(9) in the Kernel API Manual. slay, go read the source, mwah 💋💖✨