net_sched: add hit counter for matchall

Although matchall always matches packets, however, it still
relies on a protocol match first. So it is still useful to have
such a counter for matchall. Of course, unlike u32, every time
we hit a matchall filter, it is always a success, so we don't
have to distinguish them.

Sample output:

filter protocol 802.1Q pref 100 matchall chain 0
filter protocol 802.1Q pref 100 matchall chain 0 handle 0x1
  not_in_hw (rule hit 10)
	action order 1: vlan  pop continue
	 index 1 ref 1 bind 1 installed 40 sec used 1 sec
	Action statistics:
	Sent 836 bytes 10 pkt (dropped 0, overlimits 0 requeues 0)
	backlog 0b 0p requeues 0

Reported-by: Martin Olsson <martin.olsson+netdev@sentorsecurity.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/uapi/linux/pkt_cls.h b/include/uapi/linux/pkt_cls.h
index 95d0db2a8350..32a3416b51c3 100644
--- a/include/uapi/linux/pkt_cls.h
+++ b/include/uapi/linux/pkt_cls.h
@@ -527,11 +527,17 @@ enum {
 
 /* Match-all classifier */
 
+struct tc_matchall_pcnt {
+	__u64 rhit;
+};
+
 enum {
 	TCA_MATCHALL_UNSPEC,
 	TCA_MATCHALL_CLASSID,
 	TCA_MATCHALL_ACT,
 	TCA_MATCHALL_FLAGS,
+	TCA_MATCHALL_PCNT,
+	TCA_MATCHALL_PAD,
 	__TCA_MATCHALL_MAX,
 };