.. SPDX-License-Identifier: GPL-2.0
.. Copyright (C) 2023 Google LLC

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net_device struct fast path usage breakdown
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Type                                Name                        fastpath_tx_access  fastpath_rx_access  Comments
=================================== =========================== =================== =================== ===================================================================================
unsigned_long:32                    priv_flags                  read_mostly                             __dev_queue_xmit(tx)
unsigned_long:1                     lltx                        read_mostly                             HARD_TX_LOCK,HARD_TX_TRYLOCK,HARD_TX_UNLOCK(tx)
unsigned long:1                     netmem_tx:1;                read_mostly
char                                name[16]
struct netdev_name_node*            name_node
struct dev_ifalias*                 ifalias
unsigned_long                       mem_end
unsigned_long                       mem_start
unsigned_long                       base_addr
unsigned_long                       state                       read_mostly         read_mostly         netif_running(dev)
struct list_head                    dev_list
struct list_head                    napi_list
struct list_head                    unreg_list
struct list_head                    close_list
struct list_head                    ptype_all                   read_mostly                             dev_nit_active(tx)
struct list_head                    ptype_specific                                  read_mostly         deliver_ptype_list_skb/__netif_receive_skb_core(rx)
struct                              adj_list
unsigned_int                        flags                       read_mostly         read_mostly         __dev_queue_xmit,__dev_xmit_skb,ip6_output,__ip6_finish_output(tx);ip6_rcv_core(rx)
xdp_features_t                      xdp_features
struct net_device_ops*              netdev_ops                  read_mostly                             netdev_core_pick_tx,netdev_start_xmit(tx)
struct xdp_metadata_ops*            xdp_metadata_ops
int                                 ifindex                                         read_mostly         ip6_rcv_core
unsigned_short                      gflags
unsigned_short                      hard_header_len             read_mostly         read_mostly         ip6_xmit(tx);gro_list_prepare(rx)
unsigned_int                        mtu                         read_mostly                             ip_finish_output2
unsigned_short                      needed_headroom             read_mostly                             LL_RESERVED_SPACE/ip_finish_output2
unsigned_short                      needed_tailroom
netdev_features_t                   features                    read_mostly         read_mostly         HARD_TX_LOCK,netif_skb_features,sk_setup_caps(tx);netif_elide_gro(rx)
netdev_features_t                   hw_features
netdev_features_t                   wanted_features
netdev_features_t                   vlan_features
netdev_features_t                   hw_enc_features                                                     netif_skb_features
netdev_features_t                   mpls_features
netdev_features_t                   gso_partial_features        read_mostly                             gso_features_check
unsigned_int                        min_mtu
unsigned_int                        max_mtu
unsigned_short                      type
unsigned_char                       min_header_len
unsigned_char                       name_assign_type
int                                 group
struct net_device_stats             stats
struct net_device_core_stats*       core_stats
atomic_t                            carrier_up_count
atomic_t                            carrier_down_count
struct iw_handler_def*              wireless_handlers
struct ethtool_ops*                 ethtool_ops
struct l3mdev_ops*                  l3mdev_ops
struct ndisc_ops*                   ndisc_ops
struct xfrmdev_ops*                 xfrmdev_ops
struct tlsdev_ops*                  tlsdev_ops
struct header_ops*                  header_ops                  read_mostly                             ip_finish_output2,ip6_finish_output2(tx)
unsigned_char                       operstate
unsigned_char                       link_mode
unsigned_char                       if_port
unsigned_char                       dma
unsigned_char                       perm_addr[32]
unsigned_char                       addr_assign_type
unsigned_char                       addr_len
unsigned_char                       upper_level
unsigned_char                       lower_level
u8                                  threaded                                                            napi_poll(napi_enable,netif_set_threaded)
unsigned_short                      neigh_priv_len
unsigned_short                      padded
unsigned_short                      dev_id
unsigned_short                      dev_port
spinlock_t                          addr_list_lock
int                                 irq
struct netdev_hw_addr_list          uc
struct netdev_hw_addr_list          mc
struct netdev_hw_addr_list          dev_addrs
struct kset*                        queues_kset
struct list_head                    unlink_list
unsigned_int                        promiscuity
unsigned_int                        allmulti
bool                                uc_promisc
unsigned_char                       nested_level
struct in_device*                   ip_ptr                      read_mostly         read_mostly         __in_dev_get
struct hlist_head                   fib_nh_head
struct inet6_dev*                   ip6_ptr                     read_mostly         read_mostly         __in6_dev_get
struct vlan_info*                   vlan_info
struct dsa_port*                    dsa_ptr
struct tipc_bearer*                 tipc_ptr
void*                               atalk_ptr
void*                               ax25_ptr
struct wireless_dev*                ieee80211_ptr
struct wpan_dev*                    ieee802154_ptr
struct mpls_dev*                    mpls_ptr
struct mctp_dev*                    mctp_ptr
unsigned_char*                      dev_addr
struct netdev_queue*                _rx                         read_mostly                             netdev_get_rx_queue(rx)
unsigned_int                        num_rx_queues
unsigned_int                        real_num_rx_queues                              read_mostly         get_rps_cpu
struct bpf_prog*                    xdp_prog                                        read_mostly         netif_elide_gro()
unsigned_long                       gro_flush_timeout                               read_mostly         napi_complete_done
u32                                 napi_defer_hard_irqs                            read_mostly         napi_complete_done
unsigned_int                        gro_max_size                                    read_mostly         skb_gro_receive
unsigned_int                        gro_ipv4_max_size                               read_mostly         skb_gro_receive
rx_handler_func_t*                  rx_handler                  read_mostly                             __netif_receive_skb_core
void*                               rx_handler_data             read_mostly
struct netdev_queue*                ingress_queue               read_mostly
struct bpf_mprog_entry              tcx_ingress                                     read_mostly         sch_handle_ingress
struct nf_hook_entries*             nf_hooks_ingress
unsigned_char                       broadcast[32]
struct cpu_rmap*                    rx_cpu_rmap
struct hlist_node                   index_hlist
struct netdev_queue*                _tx                         read_mostly                             netdev_get_tx_queue(tx)
unsigned_int                        num_tx_queues
unsigned_int                        real_num_tx_queues          read_mostly                             skb_tx_hash,netdev_core_pick_tx(tx)
unsigned_int                        tx_queue_len
spinlock_t                          tx_global_lock
struct xdp_dev_bulk_queue__percpu*  xdp_bulkq
struct xps_dev_maps*                xps_maps[2]                 read_mostly                             __netif_set_xps_queue
struct bpf_mprog_entry              tcx_egress                  read_mostly                             sch_handle_egress
struct nf_hook_entries*             nf_hooks_egress             read_mostly
struct hlist_head                   qdisc_hash[16]
struct timer_list                   watchdog_timer
int                                 watchdog_timeo
u32                                 proto_down_reason
struct list_head                    todo_list
int__percpu*                        pcpu_refcnt
refcount_t                          dev_refcnt
struct ref_tracker_dir              refcnt_tracker
struct list_head                    link_watch_list
enum:8                              reg_state
bool                                dismantle
bool                                rtnl_link_initilizing
bool                                needs_free_netdev
void*priv_destructor                struct net_device
struct netpoll_info*                npinfo                                          read_mostly         napi_poll/napi_poll_lock
possible_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
void*                               ml_priv
enum_netdev_ml_priv_type            ml_priv_type
struct pcpu_lstats__percpu*         lstats                      read_mostly                             dev_lstats_add()
struct pcpu_sw_netstats__percpu*    tstats                      read_mostly                             dev_sw_netstats_tx_add()
struct pcpu_dstats__percpu*         dstats
struct garp_port*                   garp_port
struct mrp_port*                    mrp_port
struct dm_hw_stat_delta*            dm_private
struct device                       dev
struct attribute_group*             sysfs_groups[4]
struct attribute_group*             sysfs_rx_queue_group
struct rtnl_link_ops*               rtnl_link_ops
unsigned_int                        gso_max_size                read_mostly                             sk_dst_gso_max_size
unsigned_int                        tso_max_size
u16                                 gso_max_segs                read_mostly                             gso_max_segs
u16                                 tso_max_segs
unsigned_int                        gso_ipv4_max_size           read_mostly                             sk_dst_gso_max_size
struct dcbnl_rtnl_ops*              dcbnl_ops
s16                                 num_tc                      read_mostly                             skb_tx_hash
struct netdev_tc_txq                tc_to_txq[16]               read_mostly                             skb_tx_hash
u8                                  prio_tc_map[16]
unsigned_int                        fcoe_ddp_xid
struct netprio_map*                 priomap
struct phy_device*                  phydev
struct sfp_bus*                     sfp_bus
struct lock_class_key*              qdisc_tx_busylock
bool                                proto_down
unsigned:1                          wol_enabled
unsigned_long:1                     see_all_hwtstamp_requests
unsigned_long:1                     change_proto_down
unsigned_long:1                     netns_immutable
unsigned_long:1                     fcoe_mtu
struct list_head                    net_notifier_list
struct macsec_ops*                  macsec_ops
struct udp_tunnel_nic_info*         udp_tunnel_nic_info
struct udp_tunnel_nic*              udp_tunnel_nic
unsigned_int                        xdp_zc_max_segs
struct bpf_xdp_entity               xdp_state[3]
u8                                  dev_addr_shadow[32]
netdevice_tracker                   linkwatch_dev_tracker
netdevice_tracker                   watchdog_dev_tracker
netdevice_tracker                   dev_registered_tracker
struct rtnl_hw_stats64*             offload_xstats_l3
struct devlink_port*                devlink_port
struct dpll_pin*                    dpll_pin
struct hlist_head                   page_pools
struct dim_irq_moder*               irq_moder
u64                                 max_pacing_offload_horizon
struct_napi_config*                 napi_config
unsigned_long                       gro_flush_timeout
u32                                 napi_defer_hard_irqs
struct hlist_head                   neighbours[2]
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