rtnetlink: Compute and store minimum ifinfo dump size

The message size allocated for rtnl ifinfo dumps was limited to
a single page.  This is not enough for additional interface info
available with devices that support SR-IOV and caused a bug in
which VF info would not be displayed if more than approximately
40 VFs were created per interface.

Implement a new function pointer for the rtnl_register service that will
calculate the amount of data required for the ifinfo dump and allocate
enough data to satisfy the request.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index de2b1decd786..216ff31a0cc9 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2925,9 +2925,9 @@ int __init ip6_route_init(void)
                 goto xfrm6_init;
 
         ret = -ENOBUFS;
-        if (__rtnl_register(PF_INET6, RTM_NEWROUTE, inet6_rtm_newroute, NULL) ||
-            __rtnl_register(PF_INET6, RTM_DELROUTE, inet6_rtm_delroute, NULL) ||
-            __rtnl_register(PF_INET6, RTM_GETROUTE, inet6_rtm_getroute, NULL))
+        if (__rtnl_register(PF_INET6, RTM_NEWROUTE, inet6_rtm_newroute, NULL, NULL) ||
+            __rtnl_register(PF_INET6, RTM_DELROUTE, inet6_rtm_delroute, NULL, NULL) ||
+            __rtnl_register(PF_INET6, RTM_GETROUTE, inet6_rtm_getroute, NULL, NULL))
                 goto fib6_rules_init;
 
         ret = register_netdevice_notifier(&ip6_route_dev_notifier);