package/kernel/mac80211/patches/subsys/308-mac80211-add-support-for-.ndo_fill_forward_path.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Fri, 12 Nov 2021 12:22:23 +0100
   3 Subject: [PATCH] mac80211: add support for .ndo_fill_forward_path
   4
   5 This allows drivers to provide a destination device + info for flow offload
   6 Only supported in combination with 802.3 encap offload
   7
   8 Signed-off-by: Felix Fietkau <nbd@nbd.name>
   9 Tested-by: Lorenzo Bianconi <lorenzo@kernel.org>
  10 Link: https://lore.kernel.org/r/20211112112223.1209-1-nbd@nbd.name
  11 Signed-off-by: Johannes Berg <johannes.berg@intel.com>
  12 ---
  13
  14 --- a/include/net/mac80211.h
  15 +++ b/include/net/mac80211.h
  16 @@ -3937,6 +3937,8 @@ struct ieee80211_prep_tx_info {
  17   *     twt structure.
  18   * @twt_teardown_request: Update the hw with TWT teardown request received
  19   *     from the peer.
  20 + * @net_fill_forward_path: Called from .ndo_fill_forward_path in order to
  21 + *     resolve a path for hardware flow offloading
  22   */
  23  struct ieee80211_ops {
  24         void (*tx)(struct ieee80211_hw *hw,
  25 @@ -4265,6 +4267,13 @@ struct ieee80211_ops {
  26                               struct ieee80211_twt_setup *twt);
  27         void (*twt_teardown_request)(struct ieee80211_hw *hw,
  28                                      struct ieee80211_sta *sta, u8 flowid);
  29 +#if LINUX_VERSION_IS_GEQ(5,10,0)
  30 +       int (*net_fill_forward_path)(struct ieee80211_hw *hw,
  31 +                                    struct ieee80211_vif *vif,
  32 +                                    struct ieee80211_sta *sta,
  33 +                                    struct net_device_path_ctx *ctx,
  34 +                                    struct net_device_path *path);
  35 +#endif
  36  };
  37
  38  /**
  39 --- a/net/mac80211/driver-ops.h
  40 +++ b/net/mac80211/driver-ops.h
  41 @@ -1486,4 +1486,28 @@ static inline void drv_twt_teardown_requ
  42         trace_drv_return_void(local);
  43  }
  44
  45 +#if LINUX_VERSION_IS_GEQ(5,10,0)
  46 +static inline int drv_net_fill_forward_path(struct ieee80211_local *local,
  47 +                                           struct ieee80211_sub_if_data *sdata,
  48 +                                           struct ieee80211_sta *sta,
  49 +                                           struct net_device_path_ctx *ctx,
  50 +                                           struct net_device_path *path)
  51 +{
  52 +       int ret = -EOPNOTSUPP;
  53 +
  54 +       sdata = get_bss_sdata(sdata);
  55 +       if (!check_sdata_in_driver(sdata))
  56 +               return -EIO;
  57 +
  58 +       trace_drv_net_fill_forward_path(local, sdata, sta);
  59 +       if (local->ops->net_fill_forward_path)
  60 +               ret = local->ops->net_fill_forward_path(&local->hw,
  61 +                                                       &sdata->vif, sta,
  62 +                                                       ctx, path);
  63 +       trace_drv_return_int(local, ret);
  64 +
  65 +       return ret;
  66 +}
  67 +#endif
  68 +
  69  #endif /* __MAC80211_DRIVER_OPS */
  70 --- a/net/mac80211/ieee80211_i.h
  71 +++ b/net/mac80211/ieee80211_i.h
  72 @@ -1485,7 +1485,7 @@ struct ieee80211_local {
  73  };
  74
  75  static inline struct ieee80211_sub_if_data *
  76 -IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
  77 +IEEE80211_DEV_TO_SUB_IF(const struct net_device *dev)
  78  {
  79         return netdev_priv(dev);
  80  }
  81 --- a/net/mac80211/iface.c
  82 +++ b/net/mac80211/iface.c
  83 @@ -822,6 +822,66 @@ static const struct net_device_ops ieee8
  84
  85  };
  86
  87 +#if LINUX_VERSION_IS_GEQ(5,10,0)
  88 +static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx,
  89 +                                             struct net_device_path *path)
  90 +{
  91 +       struct ieee80211_sub_if_data *sdata;
  92 +       struct ieee80211_local *local;
  93 +       struct sta_info *sta;
  94 +       int ret = -ENOENT;
  95 +
  96 +       sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev);
  97 +       local = sdata->local;
  98 +
  99 +       if (!local->ops->net_fill_forward_path)
 100 +               return -EOPNOTSUPP;
 101 +
 102 +       rcu_read_lock();
 103 +       switch (sdata->vif.type) {
 104 +       case NL80211_IFTYPE_AP_VLAN:
 105 +               sta = rcu_dereference(sdata->u.vlan.sta);
 106 +               if (sta)
 107 +                       break;
 108 +               if (sdata->wdev.use_4addr)
 109 +                       goto out;
 110 +               if (is_multicast_ether_addr(ctx->daddr))
 111 +                       goto out;
 112 +               sta = sta_info_get_bss(sdata, ctx->daddr);
 113 +               break;
 114 +       case NL80211_IFTYPE_AP:
 115 +               if (is_multicast_ether_addr(ctx->daddr))
 116 +                       goto out;
 117 +               sta = sta_info_get(sdata, ctx->daddr);
 118 +               break;
 119 +       case NL80211_IFTYPE_STATION:
 120 +               if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
 121 +                       sta = sta_info_get(sdata, ctx->daddr);
 122 +                       if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
 123 +                               if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
 124 +                                       goto out;
 125 +
 126 +                               break;
 127 +                       }
 128 +               }
 129 +
 130 +               sta = sta_info_get(sdata, sdata->u.mgd.bssid);
 131 +               break;
 132 +       default:
 133 +               goto out;
 134 +       }
 135 +
 136 +       if (!sta)
 137 +               goto out;
 138 +
 139 +       ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path);
 140 +out:
 141 +       rcu_read_unlock();
 142 +
 143 +       return ret;
 144 +}
 145 +#endif
 146 +
 147  static const struct net_device_ops ieee80211_dataif_8023_ops = {
 148  #if LINUX_VERSION_IS_LESS(4,10,0)
 149         .ndo_change_mtu = __change_mtu,
 150 @@ -839,7 +899,9 @@ static const struct net_device_ops ieee8
 151  #else
 152         .ndo_get_stats64 = bp_ieee80211_get_stats64,
 153  #endif
 154 -
 155 +#if LINUX_VERSION_IS_GEQ(5,10,0)
 156 +       .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path,
 157 +#endif
 158  };
 159
 160  static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
 161 --- a/net/mac80211/trace.h
 162 +++ b/net/mac80211/trace.h
 163 @@ -2892,6 +2892,15 @@ TRACE_EVENT(drv_twt_teardown_request,
 164         )
 165  );
 166
 167 +#if LINUX_VERSION_IS_GEQ(5,10,0)
 168 +DEFINE_EVENT(sta_event, drv_net_fill_forward_path,
 169 +       TP_PROTO(struct ieee80211_local *local,
 170 +                struct ieee80211_sub_if_data *sdata,
 171 +                struct ieee80211_sta *sta),
 172 +       TP_ARGS(local, sdata, sta)
 173 +);
 174 +#endif
 175 +
 176  #endif /* !__MAC80211_DRIVER_TRACE || TRACE_HEADER_MULTI_READ */
 177
 178  #undef TRACE_INCLUDE_PATH