[Patch iproute2] tc: add performance counters for basic filter

[Cong Wang]

Sample output:

filter protocol arp pref 49152 basic chain 0
filter protocol arp pref 49152 basic chain 0 handle 0x1  (rule hit 3 success 3)
    action order 1: gact action pass
     random type none pass val 0
     index 1 ref 1 bind 1 installed 81 sec used 4 sec
    Action statistics:
    Sent 126 bytes 3 pkt (dropped 0, overlimits 0 requeues 0)
    backlog 0b 0p requeues 0

Cc: Jamal Hadi Salim <j...@mojatatu.com>
Cc: Jiri Pirko <j...@resnulli.us>
Cc: David Ahern <dsah...@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangc...@gmail.com>
---
 tc/f_basic.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/tc/f_basic.c b/tc/f_basic.c
index af98c088..97d43d49 100644
--- a/tc/f_basic.c
+++ b/tc/f_basic.c
@@ -110,6 +110,7 @@ static int basic_print_opt(struct filter_util *qu, FILE *f,
                           struct rtattr *opt, __u32 handle)
 {
        struct rtattr *tb[TCA_BASIC_MAX+1];
+       struct tc_basic_pcnt *pf = NULL;
 
        if (opt == NULL)
                return 0;
@@ -125,6 +126,19 @@ static int basic_print_opt(struct filter_util *qu, FILE *f,
                        
sprint_tc_classid(rta_getattr_u32(tb[TCA_BASIC_CLASSID]), b1));
        }
 
+       if (tb[TCA_BASIC_PCNT]) {
+               if (RTA_PAYLOAD(tb[TCA_BASIC_PCNT])  < sizeof(*pf)) {
+                       fprintf(f, "Broken perf counters\n");
+                       return -1;
+               }
+               pf = RTA_DATA(tb[TCA_BASIC_PCNT]);
+       }
+
+       if (show_stats && NULL != pf)
+               fprintf(f, " (rule hit %llu success %llu)",
+                       (unsigned long long) pf->rcnt,
+                       (unsigned long long) pf->rhit);
+
        if (tb[TCA_BASIC_EMATCHES])
                print_ematch(f, tb[TCA_BASIC_EMATCHES]);
 
-- 
2.20.1