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