[PATCH nf 4/5] ipvs: stats should not depend on CPU 0

[Simon Horman <horms@xxxxxxxxxxxx>]

From: Julian Anastasov <ja@xxxxxx>

When reading percpu stats we need to properly reset
the sum when CPU 0 is not present in the possible mask.

This problem was introduced by 17fc9963f837ef1
("IPVS: netns, ip_vs_stats and its procfs").

Signed-off-by: Julian Anastasov <ja@xxxxxx>
Acked-by: Hans Schillstrom <hans@xxxxxxxxxxxxxxx>
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
---
 net/netfilter/ipvs/ip_vs_est.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/ipvs/ip_vs_est.c b/net/netfilter/ipvs/ip_vs_est.c
index 6bee6d0..1425e9a 100644
--- a/net/netfilter/ipvs/ip_vs_est.c
+++ b/net/netfilter/ipvs/ip_vs_est.c
@@ -59,12 +59,13 @@ static void ip_vs_read_cpu_stats(struct ip_vs_stats_user 
*sum,
                                 struct ip_vs_cpu_stats __percpu *stats)
 {
        int i;
+       bool add = false;
 
        for_each_possible_cpu(i) {
                struct ip_vs_cpu_stats *s = per_cpu_ptr(stats, i);
                unsigned int start;
                __u64 inbytes, outbytes;
-               if (i) {
+               if (add) {
                        sum->conns += s->ustats.conns;
                        sum->inpkts += s->ustats.inpkts;
                        sum->outpkts += s->ustats.outpkts;
@@ -76,6 +77,7 @@ static void ip_vs_read_cpu_stats(struct ip_vs_stats_user *sum,
                        sum->inbytes += inbytes;
                        sum->outbytes += outbytes;
                } else {
+                       add = true;
                        sum->conns = s->ustats.conns;
                        sum->inpkts = s->ustats.inpkts;
                        sum->outpkts = s->ustats.outpkts;
-- 
1.8.4

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