ipvs: use 64-bit rates in stats

IPVS stats are limited to 2^(32-10) conns/s and packets/s,
2^(32-5) bytes/s. It is time to use 64 bits:

* Change all conn/packet kernel counters to 64-bit and update
them in u64_stats_update_{begin,end} section

* In kernel use struct ip_vs_kstats instead of the user-space
struct ip_vs_stats_user and use new func ip_vs_export_stats_user
to export it to sockopt users to preserve compatibility with
32-bit values

* Rename cpu counters "ustats" to "cnt"

* To netlink users provide additionally 64-bit stats:
IPVS_SVC_ATTR_STATS64 and IPVS_DEST_ATTR_STATS64. Old stats
remain for old binaries.

* We can use ip_vs_copy_stats in ip_vs_stats_percpu_show

Thanks to Chris Caputo for providing initial patch for ip_vs_est.c

Signed-off-by: Chris Caputo <ccaputo@alt.net>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>

1 files changed, 6 insertions, 1 deletions

diff --git a/include/uapi/linux/ip_vs.h b/include/uapi/linux/ip_vs.h
index cabe95d5b461..3199243f2028 100644
--- a/include/uapi/linux/ip_vs.h
+++ b/include/uapi/linux/ip_vs.h
@@ -358,6 +358,8 @@ enum {
 
         IPVS_SVC_ATTR_PE_NAME,          /* name of ct retriever */
 
+        IPVS_SVC_ATTR_STATS64,          /* nested attribute for service stats */
+
         __IPVS_SVC_ATTR_MAX,
 };
 
@@ -387,6 +389,8 @@ enum {
 
         IPVS_DEST_ATTR_ADDR_FAMILY,     /* Address family of address */
 
+        IPVS_DEST_ATTR_STATS64,         /* nested attribute for dest stats */
+
         __IPVS_DEST_ATTR_MAX,
 };
 
@@ -410,7 +414,8 @@ enum {
 /*
  * Attributes used to describe service or destination entry statistics
  *
- * Used inside nested attributes IPVS_SVC_ATTR_STATS and IPVS_DEST_ATTR_STATS
+ * Used inside nested attributes IPVS_SVC_ATTR_STATS, IPVS_DEST_ATTR_STATS,
+ * IPVS_SVC_ATTR_STATS64 and IPVS_DEST_ATTR_STATS64.
  */
 enum {
         IPVS_STATS_ATTR_UNSPEC = 0,