Documentation/networking/net_cachelines/net_device.rst

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