<fix>[mevoco]: fix ebtables error

Resolves: ZSTAC-45025

Change-Id: I756670726c786967626a6d747766666a7363616f

Author: pengchao.liu

kvmagent/kvmagent/plugins/mevoco.py

@@ -1493,11 +1493,20 @@ def _add_ebtable_rules_for_vfnics(dhcpInfo):
                 CHAIN_NAME = getDhcpEbtableChainName(dhcp_ip)
                 VF_NIC_MAC = ip.removeZeroFromMacAddress(dhcpInfo.mac)
 
-                if bash_r(EBTABLES_CMD + " -L {{CHAIN_NAME}} | grep -- '-p IPv4 -s {{VF_NIC_MAC}} --ip-proto udp --ip-sport 67:68 -j ACCEPT' > /dev/null") != 0:
-                    bash_r(EBTABLES_CMD + ' -I {{CHAIN_NAME}} -p IPv4 -s {{VF_NIC_MAC}} --ip-proto udp --ip-sport 67:68 -j ACCEPT')
+                if bash_r(EBTABLES_CMD + ' -L ZSTACK-VF-DHCP > /dev/null 2>&1') != 0:
+                    bash_errorout(EBTABLES_CMD + ' -N ZSTACK-VF-DHCP')
 
-                if bash_r(EBTABLES_CMD + " -L {{CHAIN_NAME}} | grep -- '-p IPv4 -d {{VF_NIC_MAC}} --ip-proto udp --ip-sport 67:68 -j ACCEPT' > /dev/null") != 0:
-                    bash_r(EBTABLES_CMD + ' -I {{CHAIN_NAME}} -p IPv4 -d {{VF_NIC_MAC}} --ip-proto udp --ip-sport 67:68 -j ACCEPT')
+                if bash_r(EBTABLES_CMD + " -L FORWARD | grep -- '-j ZSTACK-VF-DHCP' > /dev/null") != 0:
+                    bash_r(EBTABLES_CMD + ' -I FORWARD -j ZSTACK-VF-DHCP')
+
+                if bash_r(EBTABLES_CMD + " -L ZSTACK-VF-DHCP | grep -- '-j RETURN' > /dev/null") != 0:
+                    bash_r(EBTABLES_CMD + ' -A ZSTACK-VF-DHCP -j RETURN')
+
+                if bash_r(EBTABLES_CMD + " -L ZSTACK-VF-DHCP | grep -- '-p IPv4 -s {{VF_NIC_MAC}} --ip-proto udp --ip-sport 67:68 -j ACCEPT' > /dev/null") != 0:
+                    bash_r(EBTABLES_CMD + ' -I ZSTACK-VF-DHCP -p IPv4 -s {{VF_NIC_MAC}} --ip-proto udp --ip-sport 67:68 -j ACCEPT')
+
+                if bash_r(EBTABLES_CMD + " -L ZSTACK-VF-DHCP | grep -- '-p IPv4 -d {{VF_NIC_MAC}} --ip-proto udp --ip-sport 67:68 -j ACCEPT' > /dev/null") != 0:
+                    bash_r(EBTABLES_CMD + ' -I ZSTACK-VF-DHCP -p IPv4 -d {{VF_NIC_MAC}} --ip-proto udp --ip-sport 67:68 -j ACCEPT')
 
         @in_bash
         def apply(dhcp):
@@ -1886,8 +1895,8 @@ def _remove_ebtable_rules_for_vfnics(dhcpInfo):
             if dhcp_ip:
                 CHAIN_NAME = getDhcpEbtableChainName(dhcp_ip)
                 VF_NIC_MAC = dhcpInfo.mac
-                bash_r(EBTABLES_CMD + ' -D {{CHAIN_NAME}} -p IPv4 -s {{VF_NIC_MAC}} --ip-proto udp --ip-sport 67:68 -j ACCEPT')
-                bash_r(EBTABLES_CMD + ' -D {{CHAIN_NAME}} -p IPv4 -d {{VF_NIC_MAC}} --ip-proto udp --ip-sport 67:68 -j ACCEPT')
+                bash_r(EBTABLES_CMD + ' -D ZSTACK-VF-DHCP -p IPv4 -s {{VF_NIC_MAC}} --ip-proto udp --ip-sport 67:68 -j ACCEPT')
+                bash_r(EBTABLES_CMD + ' -D ZSTACK-VF-DHCP -p IPv4 -d {{VF_NIC_MAC}} --ip-proto udp --ip-sport 67:68 -j ACCEPT')
 
         @in_bash
         def release(dhcp):