ib_destroy_qp(9)

💖 ib_destroy_qp — the Kernel API Manual glow-up 💖

okay bestie, so this is the ib_destroy_qp(9) page from the Kernel API Manual, and honestly? it's short, it's sweet, it's giving "one job and she does it." no cap.

---

✨ NAME ✨

ib_destroy_qp — destroys the specified kernel QP. that's it. that's the whole vibe. 💅

---

🌸 SYNOPSIS 🌸

int ib_destroy_qp (struct ib_qp *qp );

literally one function, one arg, and a whole lot of closure energy 🔥

---

🎀 ARGUMENTS 🎀

• qp — the QP to destroy. the main character of this whole page, the one getting yeeted. she's a struct ib_qp * and she's about to be gone 🦋

---

⚠️ NOTE ⚠️

okay this is the part where you pay attention, bestie 🫶 — for a user qp you gotta use ib_destroy_qp_user with valid udata! do not come for ib_destroy_qp with a user QP, that's not her job, iykyk 🙈

---

🌈 SEE ALSO 🌈

the linkies, alphabet-adjacent chaos, and yes we're listing every single one because i don't gatekeep 💜 the kernel file to peep is ./include/rdma/ib_verbs.h, and then:

• stats, rates & types: 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)
• QP-adjacent besties: ib_modify_qp_is_ok(9), ib_create_qp(9), ib_modify_qp_with_udata(9), ib_modify_qp(9), ib_query_qp(9), ib_open_qp(9), ib_close_qp(9), ib_post_send(9), ib_post_recv(9)
• capability checks, the whole squad: 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)
• PDs & AHs: 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)
• SRQs: ib_modify_srq(9), ib_query_srq(9), ib_destroy_srq_user(9), ib_destroy_srq(9), ib_post_srq_recv(9)
• CQs: 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)
• DMA girlies: 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)
• MRs & multicast: 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)
• device & addressing misc (the deep cuts 💀): ib_device_try_get(9), rdma_ah_find_type(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)

---

and that's the whole page, bestie, we ate and left zero crumbs 🍓✨ it lives in ./include/rdma, dated October 2026 — so cute, so timeless, periodt 👑🦋