------- Comment From z...@us.ibm.com 2020-07-21 14:57 EDT-------
It can be any NIC, or even lo device.
The fix2.txt has the example like this:
$ $TC qdisc add dev lo ingress
$ $TC filter add dev lo parent ffff: prio 3 proto ip flower ip_tos 0x8/32
$ $TC fitler add dev lo parent ffff: prio 5 proto ip flower ip_proto tcp \
tcp_flags 0x909/f00

$ $TC filter show dev lo parent ffff:
filter protocol ip pref 3 flower chain 0
filter protocol ip pref 3 flower chain 0 handle 0x1
eth_type ipv4
ip_tos 0x8/32
not_in_hw
filter protocol ip pref 5 flower chain 0
filter protocol ip pref 5 flower chain 0 handle 0x1
eth_type ipv4
ip_proto tcp
tcp_flags 0x909/f00  /* <--- */

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https://bugs.launchpad.net/bugs/1873961

Title:
  tc filter show tcp_flags wrong mask value

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