1.. SPDX-License-Identifier: GPL-2.0 2.. Copyright (C) 2023 Google LLC 3 4=========================================== 5net_device struct fast path usage breakdown 6=========================================== 7 8Type Name fastpath_tx_access fastpath_rx_access Comments 9..struct ..net_device 10unsigned_long:32 priv_flags read_mostly - __dev_queue_xmit(tx) 11unsigned_long:1 lltx read_mostly - HARD_TX_LOCK,HARD_TX_TRYLOCK,HARD_TX_UNLOCK(tx) 12char name[16] - - 13struct_netdev_name_node* name_node 14struct_dev_ifalias* ifalias 15unsigned_long mem_end 16unsigned_long mem_start 17unsigned_long base_addr 18unsigned_long state read_mostly read_mostly netif_running(dev) 19struct_list_head dev_list 20struct_list_head napi_list 21struct_list_head unreg_list 22struct_list_head close_list 23struct_list_head ptype_all read_mostly - dev_nit_active(tx) 24struct_list_head ptype_specific read_mostly deliver_ptype_list_skb/__netif_receive_skb_core(rx) 25struct adj_list 26unsigned_int flags read_mostly read_mostly __dev_queue_xmit,__dev_xmit_skb,ip6_output,__ip6_finish_output(tx);ip6_rcv_core(rx) 27xdp_features_t xdp_features 28struct_net_device_ops* netdev_ops read_mostly - netdev_core_pick_tx,netdev_start_xmit(tx) 29struct_xdp_metadata_ops* xdp_metadata_ops 30int ifindex - read_mostly ip6_rcv_core 31unsigned_short gflags 32unsigned_short hard_header_len read_mostly read_mostly ip6_xmit(tx);gro_list_prepare(rx) 33unsigned_int mtu read_mostly - ip_finish_output2 34unsigned_short needed_headroom read_mostly - LL_RESERVED_SPACE/ip_finish_output2 35unsigned_short needed_tailroom 36netdev_features_t features read_mostly read_mostly HARD_TX_LOCK,netif_skb_features,sk_setup_caps(tx);netif_elide_gro(rx) 37netdev_features_t hw_features 38netdev_features_t wanted_features 39netdev_features_t vlan_features 40netdev_features_t hw_enc_features - - netif_skb_features 41netdev_features_t mpls_features 42netdev_features_t gso_partial_features read_mostly gso_features_check 43unsigned_int min_mtu 44unsigned_int max_mtu 45unsigned_short type 46unsigned_char min_header_len 47unsigned_char name_assign_type 48int group 49struct_net_device_stats stats 50struct_net_device_core_stats* core_stats 51atomic_t carrier_up_count 52atomic_t carrier_down_count 53struct_iw_handler_def* wireless_handlers 54struct_iw_public_data* wireless_data 55struct_ethtool_ops* ethtool_ops 56struct_l3mdev_ops* l3mdev_ops 57struct_ndisc_ops* ndisc_ops 58struct_xfrmdev_ops* xfrmdev_ops 59struct_tlsdev_ops* tlsdev_ops 60struct_header_ops* header_ops read_mostly - ip_finish_output2,ip6_finish_output2(tx) 61unsigned_char operstate 62unsigned_char link_mode 63unsigned_char if_port 64unsigned_char dma 65unsigned_char perm_addr[32] 66unsigned_char addr_assign_type 67unsigned_char addr_len 68unsigned_char upper_level 69unsigned_char lower_level 70unsigned_short neigh_priv_len 71unsigned_short padded 72unsigned_short dev_id 73unsigned_short dev_port 74spinlock_t addr_list_lock 75int irq 76struct_netdev_hw_addr_list uc 77struct_netdev_hw_addr_list mc 78struct_netdev_hw_addr_list dev_addrs 79struct_kset* queues_kset 80struct_list_head unlink_list 81unsigned_int promiscuity 82unsigned_int allmulti 83bool uc_promisc 84unsigned_char nested_level 85struct_in_device* ip_ptr read_mostly read_mostly __in_dev_get 86struct_inet6_dev* ip6_ptr read_mostly read_mostly __in6_dev_get 87struct_vlan_info* vlan_info 88struct_dsa_port* dsa_ptr 89struct_tipc_bearer* tipc_ptr 90void* atalk_ptr 91void* ax25_ptr 92struct_wireless_dev* ieee80211_ptr 93struct_wpan_dev* ieee802154_ptr 94struct_mpls_dev* mpls_ptr 95struct_mctp_dev* mctp_ptr 96unsigned_char* dev_addr 97struct_netdev_queue* _rx read_mostly - netdev_get_rx_queue(rx) 98unsigned_int num_rx_queues 99unsigned_int real_num_rx_queues - read_mostly get_rps_cpu 100struct_bpf_prog* xdp_prog - read_mostly netif_elide_gro() 101unsigned_long gro_flush_timeout - read_mostly napi_complete_done 102u32 napi_defer_hard_irqs - read_mostly napi_complete_done 103unsigned_int gro_max_size - read_mostly skb_gro_receive 104unsigned_int gro_ipv4_max_size - read_mostly skb_gro_receive 105rx_handler_func_t* rx_handler read_mostly - __netif_receive_skb_core 106void* rx_handler_data read_mostly - 107struct_netdev_queue* ingress_queue read_mostly - 108struct_bpf_mprog_entry tcx_ingress - read_mostly sch_handle_ingress 109struct_nf_hook_entries* nf_hooks_ingress 110unsigned_char broadcast[32] 111struct_cpu_rmap* rx_cpu_rmap 112struct_hlist_node index_hlist 113struct_netdev_queue* _tx read_mostly - netdev_get_tx_queue(tx) 114unsigned_int num_tx_queues - - 115unsigned_int real_num_tx_queues read_mostly - skb_tx_hash,netdev_core_pick_tx(tx) 116unsigned_int tx_queue_len 117spinlock_t tx_global_lock 118struct_xdp_dev_bulk_queue__percpu* xdp_bulkq 119struct_xps_dev_maps* xps_maps[2] read_mostly - __netif_set_xps_queue 120struct_bpf_mprog_entry tcx_egress read_mostly - sch_handle_egress 121struct_nf_hook_entries* nf_hooks_egress read_mostly - 122struct_hlist_head qdisc_hash[16] 123struct_timer_list watchdog_timer 124int watchdog_timeo 125u32 proto_down_reason 126struct_list_head todo_list 127int__percpu* pcpu_refcnt 128refcount_t dev_refcnt 129struct_ref_tracker_dir refcnt_tracker 130struct_list_head link_watch_list 131enum:8 reg_state 132bool dismantle 133enum:16 rtnl_link_state 134bool needs_free_netdev 135void*priv_destructor struct_net_device 136struct_netpoll_info* npinfo - read_mostly napi_poll/napi_poll_lock 137possible_net_t nd_net - read_mostly (dev_net)napi_busy_loop,tcp_v(4/6)_rcv,ip(v6)_rcv,ip(6)_input,ip(6)_input_finish 138void* ml_priv 139enum_netdev_ml_priv_type ml_priv_type 140struct_pcpu_lstats__percpu* lstats read_mostly dev_lstats_add() 141struct_pcpu_sw_netstats__percpu* tstats read_mostly dev_sw_netstats_tx_add() 142struct_pcpu_dstats__percpu* dstats 143struct_garp_port* garp_port 144struct_mrp_port* mrp_port 145struct_dm_hw_stat_delta* dm_private 146struct_device dev - - 147struct_attribute_group* sysfs_groups[4] 148struct_attribute_group* sysfs_rx_queue_group 149struct_rtnl_link_ops* rtnl_link_ops 150unsigned_int gso_max_size read_mostly - sk_dst_gso_max_size 151unsigned_int tso_max_size 152u16 gso_max_segs read_mostly - gso_max_segs 153u16 tso_max_segs 154unsigned_int gso_ipv4_max_size read_mostly - sk_dst_gso_max_size 155struct_dcbnl_rtnl_ops* dcbnl_ops 156s16 num_tc read_mostly - skb_tx_hash 157struct_netdev_tc_txq tc_to_txq[16] read_mostly - skb_tx_hash 158u8 prio_tc_map[16] 159unsigned_int fcoe_ddp_xid 160struct_netprio_map* priomap 161struct_phy_device* phydev 162struct_sfp_bus* sfp_bus 163struct_lock_class_key* qdisc_tx_busylock 164bool proto_down 165unsigned:1 wol_enabled 166unsigned:1 threaded - - napi_poll(napi_enable,dev_set_threaded) 167unsigned_long:1 see_all_hwtstamp_requests 168unsigned_long:1 change_proto_down 169unsigned_long:1 netns_local 170unsigned_long:1 fcoe_mtu 171struct_list_head net_notifier_list 172struct_macsec_ops* macsec_ops 173struct_udp_tunnel_nic_info* udp_tunnel_nic_info 174struct_udp_tunnel_nic* udp_tunnel_nic 175unsigned_int xdp_zc_max_segs 176struct_bpf_xdp_entity xdp_state[3] 177u8 dev_addr_shadow[32] 178netdevice_tracker linkwatch_dev_tracker 179netdevice_tracker watchdog_dev_tracker 180netdevice_tracker dev_registered_tracker 181struct_rtnl_hw_stats64* offload_xstats_l3 182struct_devlink_port* devlink_port 183struct_dpll_pin* dpll_pin 184struct hlist_head page_pools 185struct dim_irq_moder* irq_moder 186