if_link: Add an additional parameter to ifla_vf_info for RSS querying

Add configuration setting for drivers to allow/block an RSS Redirection
Table and a Hash Key querying for discrete VFs.

On some devices VF share the mentioned above information with PF and
querying it may adduce a theoretical security risk. We want to let a
system administrator to decide if he/she wants to take this risk or not.

Signed-off-by: Vlad Zolotarov <vladz@cloudius-systems.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index bf6d9df34d7b..13acb3d8ecdd 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -878,6 +878,11 @@ typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
  * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
  * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
  *                        struct nlattr *port[]);
+ *
+ *      Enable or disable the VF ability to query its RSS Redirection Table and
+ *      Hash Key. This is needed since on some devices VF share this information
+ *      with PF and querying it may adduce a theoretical security risk.
+ * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
  * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
  * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
  *      Called to setup 'tc' number of traffic classes in the net device. This
@@ -1099,6 +1104,9 @@ struct net_device_ops {
                                                    struct nlattr *port[]);
         int                     (*ndo_get_vf_port)(struct net_device *dev,
                                                    int vf, struct sk_buff *skb);
+        int                     (*ndo_set_vf_rss_query_en)(
+                                                   struct net_device *dev,
+                                                   int vf, bool setting);
         int                     (*ndo_setup_tc)(struct net_device *dev, u8 tc);
 #if IS_ENABLED(CONFIG_FCOE)
         int                     (*ndo_fcoe_enable)(struct net_device *dev);