packet: deliver VLAN TPID to userspace

This enables userspace to get VLAN TPID as well as the VLAN TCI.

Signed-off-by: Atzm Watanabe <atzm@stratosphere.co.jp>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 14 insertions, 10 deletions

diff --git a/include/uapi/linux/if_packet.h b/include/uapi/linux/if_packet.h
index 9185dc9a4485..e9d844c80c11 100644
--- a/include/uapi/linux/if_packet.h
+++ b/include/uapi/linux/if_packet.h
@@ -84,17 +84,18 @@ struct tpacket_auxdata {
         __u16           tp_mac;
         __u16           tp_net;
         __u16           tp_vlan_tci;
-        __u16           tp_padding;
+        __u16           tp_vlan_tpid;
 };
 
 /* Rx ring - header status */
-#define TP_STATUS_KERNEL              0
-#define TP_STATUS_USER          (1 << 0)
-#define TP_STATUS_COPY          (1 << 1)
-#define TP_STATUS_LOSING        (1 << 2)
-#define TP_STATUS_CSUMNOTREADY  (1 << 3)
-#define TP_STATUS_VLAN_VALID    (1 << 4) /* auxdata has valid tp_vlan_tci */
-#define TP_STATUS_BLK_TMO       (1 << 5)
+#define TP_STATUS_KERNEL                      0
+#define TP_STATUS_USER                  (1 << 0)
+#define TP_STATUS_COPY                  (1 << 1)
+#define TP_STATUS_LOSING                (1 << 2)
+#define TP_STATUS_CSUMNOTREADY          (1 << 3)
+#define TP_STATUS_VLAN_VALID            (1 << 4) /* auxdata has valid tp_vlan_tci */
+#define TP_STATUS_BLK_TMO               (1 << 5)
+#define TP_STATUS_VLAN_TPID_VALID       (1 << 6) /* auxdata has valid tp_vlan_tpid */
 
 /* Tx ring - header status */
 #define TP_STATUS_AVAILABLE           0
@@ -133,12 +134,15 @@ struct tpacket2_hdr {
         __u32           tp_sec;
         __u32           tp_nsec;
         __u16           tp_vlan_tci;
-        __u8            tp_padding[6];
+        __u16           tp_vlan_tpid;
+        __u8            tp_padding[4];
 };
 
 struct tpacket_hdr_variant1 {
         __u32   tp_rxhash;
         __u32   tp_vlan_tci;
+        __u16   tp_vlan_tpid;
+        __u16   tp_padding;
 };
 
 struct tpacket3_hdr {
@@ -154,7 +158,7 @@ struct tpacket3_hdr {
         union {
                 struct tpacket_hdr_variant1 hv1;
         };
-        __u8            tp_padding[12];
+        __u8            tp_padding[8];
 };
 
 struct tpacket_bd_ts {