target/linux/generic/backport-5.10/610-v5.13-16-net-dsa-resolve-forwarding-path-for-dsa-slave-ports.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Wed, 24 Mar 2021 02:30:37 +0100
   3 Subject: [PATCH] net: dsa: resolve forwarding path for dsa slave ports
   4
   5 Add .ndo_fill_forward_path for dsa slave port devices
   6
   7 Signed-off-by: Felix Fietkau <nbd@nbd.name>
   8 Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
   9 ---
  10
  11 --- a/include/linux/netdevice.h
  12 +++ b/include/linux/netdevice.h
  13 @@ -853,6 +853,7 @@ enum net_device_path_type {
  14         DEV_PATH_VLAN,
  15         DEV_PATH_BRIDGE,
  16         DEV_PATH_PPPOE,
  17 +       DEV_PATH_DSA,
  18  };
  19
  20  struct net_device_path {
  21 @@ -873,6 +874,10 @@ struct net_device_path {
  22                         u16             vlan_id;
  23                         __be16          vlan_proto;
  24                 } bridge;
  25 +               struct {
  26 +                       int port;
  27 +                       u16 proto;
  28 +               } dsa;
  29         };
  30  };
  31
  32 --- a/net/dsa/slave.c
  33 +++ b/net/dsa/slave.c
  34 @@ -1619,6 +1619,21 @@ static struct devlink_port *dsa_slave_ge
  35         return dp->ds->devlink ? &dp->devlink_port : NULL;
  36  }
  37
  38 +static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx,
  39 +                                      struct net_device_path *path)
  40 +{
  41 +       struct dsa_port *dp = dsa_slave_to_port(ctx->dev);
  42 +       struct dsa_port *cpu_dp = dp->cpu_dp;
  43 +
  44 +       path->dev = ctx->dev;
  45 +       path->type = DEV_PATH_DSA;
  46 +       path->dsa.proto = cpu_dp->tag_ops->proto;
  47 +       path->dsa.port = dp->index;
  48 +       ctx->dev = cpu_dp->master;
  49 +
  50 +       return 0;
  51 +}
  52 +
  53  static const struct net_device_ops dsa_slave_netdev_ops = {
  54         .ndo_open               = dsa_slave_open,
  55         .ndo_stop               = dsa_slave_close,
  56 @@ -1644,6 +1659,7 @@ static const struct net_device_ops dsa_s
  57         .ndo_vlan_rx_kill_vid   = dsa_slave_vlan_rx_kill_vid,
  58         .ndo_get_devlink_port   = dsa_slave_get_devlink_port,
  59         .ndo_change_mtu         = dsa_slave_change_mtu,
  60 +       .ndo_fill_forward_path  = dsa_slave_fill_forward_path,
  61  };
  62
  63  static struct device_type dsa_type = {