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Zhe Weng
8d7799d6c1
1. We add default PCP because some of our apps may not want to set PCP manually (e.g. Our user may just ping with pre-set PCP) 2. The `vlan_qos` is used as PCP when setting Linux's priority mapping: https://github.com/torvalds/linux/blob/v6.12/net/8021q/vlan.c#L590 Although `vlan_qos` is not used when creating VLAN on Linux, we can use it as PCP on creating VLAN (without changing its meaning), and keep compatible with Linux's creating (Exactly the same when `vlan_qos` is 0). Signed-off-by: Zhe Weng <wengzhe@xiaomi.com>