team: Fix incorrect deletion of ETH_P_8021AD protocol vid from slaves

Similar to commit 01f4fd270870 ("bonding: Fix incorrect deletion of
ETH_P_8021AD protocol vid from slaves"), we can trigger BUG_ON(!vlan_info)
in unregister_vlan_dev() with the following testcase:

  # ip netns add ns1
  # ip netns exec ns1 ip link add team1 type team
  # ip netns exec ns1 ip link add team_slave type veth peer veth2
  # ip netns exec ns1 ip link set team_slave master team1
  # ip netns exec ns1 ip link add link team_slave name team_slave.10 type vlan id 10 protocol 802.1ad
  # ip netns exec ns1 ip link add link team1 name team1.10 type vlan id 10 protocol 802.1ad
  # ip netns exec ns1 ip link set team_slave nomaster
  # ip netns del ns1

Add S-VLAN tag related features support to team driver. So the team driver
will always propagate the VLAN info to its slaves.

Fixes: 8ad227ff89a7 ("net: vlan: add 802.1ad support")
Suggested-by: Ido Schimmel <idosch@idosch.org>
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20230814032301.2804971-1-william.xuanziyang@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
index d3dc22509ea582644474c943361bdb1b48076503..382756c3fb837a97bf0e9e8a0ddad60347ae70e8 100644 (file)
--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -2200,7 +2200,9 @@ static void team_setup(struct net_device *dev)
 
        dev->hw_features = TEAM_VLAN_FEATURES |
                           NETIF_F_HW_VLAN_CTAG_RX |
-                          NETIF_F_HW_VLAN_CTAG_FILTER;
+                          NETIF_F_HW_VLAN_CTAG_FILTER |
+                          NETIF_F_HW_VLAN_STAG_RX |
+                          NETIF_F_HW_VLAN_STAG_FILTER;
 
        dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
        dev->features |= dev->hw_features;