qlcnic: support anti mac spoofing

Administrator can configure to drop packet in transmit,
if it doesn't match interface mac address, in case of virtual function.

Signed-off-by: Sony Chacko <sony.chacko@qlogic.com>
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 12 insertions, 0 deletions

diff --git a/drivers/net/qlcnic/qlcnic.h b/drivers/net/qlcnic/qlcnic.h
index 9433a05555f1..b58c4119f279 100644
--- a/drivers/net/qlcnic/qlcnic.h
+++ b/drivers/net/qlcnic/qlcnic.h
@@ -900,6 +900,7 @@ struct qlcnic_mac_req {
 #define QLCNIC_BRIDGE_ENABLED           0X10
 #define QLCNIC_DIAG_ENABLED             0x20
 #define QLCNIC_ESWITCH_ENABLED          0x40
+#define QLCNIC_MACSPOOF                 0x200
 #define QLCNIC_IS_MSI_FAMILY(adapter) \
         ((adapter)->flags & (QLCNIC_MSI_ENABLED | QLCNIC_MSIX_ENABLED))
 
diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index aa1f6b3c3b80..de4be00e31e5 100644
--- a/drivers/net/qlcnic/qlcnic_main.c
+++ b/drivers/net/qlcnic/qlcnic_main.c
@@ -762,6 +762,11 @@ static void
 qlcnic_set_eswitch_port_features(struct qlcnic_adapter *adapter,
                 struct qlcnic_esw_func_cfg *esw_cfg)
 {
+        adapter->flags &= ~QLCNIC_MACSPOOF;
+        if (adapter->op_mode == QLCNIC_NON_PRIV_FUNC)
+                if (esw_cfg->mac_anti_spoof)
+                        adapter->flags |= QLCNIC_MACSPOOF;
+
         qlcnic_set_netdev_features(adapter, esw_cfg);
 }
 
@@ -1912,6 +1917,12 @@ qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
                 return NETDEV_TX_BUSY;
         }
 
+        if (adapter->flags & QLCNIC_MACSPOOF) {
+                if (compare_ether_addr(eth_hdr(skb)->h_source,
+                                        adapter->mac_addr))
+                        goto drop_packet;
+        }
+
         frag_count = skb_shinfo(skb)->nr_frags + 1;
 
         /* 4 fragments per cmd des */