net/ice/base: add check to IPv4 next protocol

In order to support switch rule for NVGRE packets,
it need to check ipv4 next protocol number, if it is 0x2F,
which means next payload is NVGRE, we need to use NVGRE
format dummy packet.

Signed-off-by: Wei Zhao <wei.zhao1@intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Signed-off-by: Paul M Stillwell Jr <paul.m.stillwell.jr@intel.com>
Acked-by: Qiming Yang <qiming.yang@intel.com>

diff --git a/drivers/net/ice/base/ice_switch.c b/drivers/net/ice/base/ice_switch.c
index 29fa9cf..a7fb30b 100644 (file)
--- a/drivers/net/ice/base/ice_switch.c
+++ b/drivers/net/ice/base/ice_switch.c
@@ -10,6 +10,7 @@
 #define ICE_ETH_ETHTYPE_OFFSET         12
 #define ICE_ETH_VLAN_TCI_OFFSET                14
 #define ICE_MAX_VLAN_ID                        0xFFF
+#define ICE_IPV4_NVGRE_PROTO_ID                0x002F
 
 /* Dummy ethernet header needed in the ice_aqc_sw_rules_elem
  * struct to configure any switch filter rules.
@@ -5908,6 +5909,7 @@ ice_find_dummy_packet(struct ice_adv_lkup_elem *lkups, u16 lkups_cnt,
                      const struct ice_dummy_pkt_offsets **offsets)
 {
        bool tcp = false, udp = false, ipv6 = false, vlan = false;
+       bool gre = false;
        u16 i;
 
        if (tun_type == ICE_SW_TUN_GTP) {
@@ -5931,6 +5933,12 @@ ice_find_dummy_packet(struct ice_adv_lkup_elem *lkups, u16 lkups_cnt,
                        ipv6 = true;
                else if (lkups[i].type == ICE_VLAN_OFOS)
                        vlan = true;
+               else if (lkups[i].type == ICE_IPV4_OFOS &&
+                        lkups[i].h_u.ipv4_hdr.protocol ==
+                               ICE_IPV4_NVGRE_PROTO_ID &&
+                        lkups[i].m_u.ipv4_hdr.protocol ==
+                               0xFF)
+                       gre = true;
        }
 
        if (tun_type == ICE_ALL_TUNNELS) {
@@ -5940,7 +5948,7 @@ ice_find_dummy_packet(struct ice_adv_lkup_elem *lkups, u16 lkups_cnt,
                return;
        }
 
-       if (tun_type == ICE_SW_TUN_NVGRE) {
+       if (tun_type == ICE_SW_TUN_NVGRE || gre) {
                if (tcp) {
                        *pkt = dummy_gre_tcp_packet;
                        *pkt_len = sizeof(dummy_gre_tcp_packet);