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, 2 insertions, 2 deletions

diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c
index 3609eacaf4ce..ed1bb8c65a9e 100644
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -1819,8 +1819,8 @@ static int __init dcbnl_init(void)
 {
         INIT_LIST_HEAD(&dcb_app_list);
 
-        rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL);
-        rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL);
+        rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, NULL);
+        rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, NULL);
 
         return 0;
 }