[net-next 09/10] net/core: Add drop counters to VF statistics

[Saeed Mahameed]

From: Eugenia Emantayev <euge...@mellanox.com>

Modern hardware can decide to drop packets going to/from a VF.
Add receive and transmit drop counters to be displayed at hypervisor
layer in iproute2 per VF statistics.

Signed-off-by: Eugenia Emantayev <euge...@mellanox.com>
Signed-off-by: Saeed Mahameed <sae...@mellanox.com>
---
 include/linux/if_link.h      |  2 ++
 include/uapi/linux/if_link.h |  2 ++
 net/core/rtnetlink.c         | 10 +++++++++-
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index 4c54611e03e9..622658dfbf0a 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -13,6 +13,8 @@ struct ifla_vf_stats {
        __u64 tx_bytes;
        __u64 broadcast;
        __u64 multicast;
+       __u64 rx_dropped;
+       __u64 tx_dropped;
 };
 
 struct ifla_vf_info {
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 19fc02660e0c..f8f04fed6186 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -732,6 +732,8 @@ enum {
        IFLA_VF_STATS_BROADCAST,
        IFLA_VF_STATS_MULTICAST,
        IFLA_VF_STATS_PAD,
+       IFLA_VF_STATS_RX_DROPPED,
+       IFLA_VF_STATS_TX_DROPPED,
        __IFLA_VF_STATS_MAX,
 };
 
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index c688dc564b11..5421a3fd3ba1 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -904,6 +904,10 @@ static inline int rtnl_vfinfo_size(const struct net_device 
*dev,
                         nla_total_size_64bit(sizeof(__u64)) +
                         /* IFLA_VF_STATS_MULTICAST */
                         nla_total_size_64bit(sizeof(__u64)) +
+                        /* IFLA_VF_STATS_RX_DROPPED */
+                        nla_total_size_64bit(sizeof(__u64)) +
+                        /* IFLA_VF_STATS_TX_DROPPED */
+                        nla_total_size_64bit(sizeof(__u64)) +
                         nla_total_size(sizeof(struct ifla_vf_trust)));
                return size;
        } else
@@ -1258,7 +1262,11 @@ static noinline_for_stack int rtnl_fill_vfinfo(struct 
sk_buff *skb,
            nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
                              vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
            nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
-                             vf_stats.multicast, IFLA_VF_STATS_PAD)) {
+                             vf_stats.multicast, IFLA_VF_STATS_PAD) ||
+           nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
+                             vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
+           nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
+                             vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
                nla_nest_cancel(skb, vfstats);
                goto nla_put_vf_failure;
        }
-- 
2.13.0