Add vxlan-bypass feature to IP6 forwarding path
Add vxlan-bypass feature which can be enabled on the IP6 underlay
interface which receive VXLAN packets to accelerate VXLAN decap
processing. The CLI to enable/disable it is:
set interface ip6 vxlan-bypass <interface> [del]
The vxlan-bypass feature is already supported on the IP4 underlay
interface. The CLI to enable/disable it is:
set interface ip vxlan-bypass <interface> [del]
Move vxlan-bypass API/CLI support code from decap.c to vxlan.c.
Also fixed two issues in the VXLAN decap path in the vxlan-input node:
1. Add verification of VXLAN packet FIB index with the encap-vrf-id
of the VXLAN tunnel.
2. Fix checking of VXLANoIPv6 packet mcast DIP against that of the
IP6 mcast VXLAN tunnel.
Change-Id: I2bad4074a468c48fbb8bb5ac64f6437190756ed2
Signed-off-by: John Lo <loj@cisco.com>
diff --git a/src/vnet/vxlan/vxlan.c b/src/vnet/vxlan/vxlan.c
index 9ed4287..02465eb 100644
--- a/src/vnet/vxlan/vxlan.c
+++ b/src/vnet/vxlan/vxlan.c
@@ -921,6 +921,177 @@
/* *INDENT-ON* */
+void vnet_int_vxlan_bypass_mode (u32 sw_if_index,
+ u8 is_ip6,
+ u8 is_enable)
+{
+ if (is_ip6)
+ vnet_feature_enable_disable ("ip6-unicast", "ip6-vxlan-bypass",
+ sw_if_index, is_enable, 0, 0);
+ else
+ vnet_feature_enable_disable ("ip4-unicast", "ip4-vxlan-bypass",
+ sw_if_index, is_enable, 0, 0);
+}
+
+
+static clib_error_t *
+set_ip_vxlan_bypass (u32 is_ip6,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, * line_input = &_line_input;
+ vnet_main_t * vnm = vnet_get_main();
+ clib_error_t * error = 0;
+ u32 sw_if_index, is_enable;
+
+ sw_if_index = ~0;
+ is_enable = 1;
+
+ if (! unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat_user (line_input, unformat_vnet_sw_interface, vnm, &sw_if_index))
+ ;
+ else if (unformat (line_input, "del"))
+ is_enable = 0;
+ else
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
+ }
+
+ if (~0 == sw_if_index)
+ {
+ error = clib_error_return (0, "unknown interface `%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+
+ vnet_int_vxlan_bypass_mode (sw_if_index, is_ip6, is_enable);
+
+ done:
+ return error;
+}
+
+static clib_error_t *
+set_ip4_vxlan_bypass (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ return set_ip_vxlan_bypass (0, input, cmd);
+}
+
+/*?
+ * This command adds the 'ip4-vxlan-bypass' graph node for a given interface.
+ * By adding the IPv4 vxlan-bypass graph node to an interface, the node checks
+ * for and validate input vxlan packet and bypass ip4-lookup, ip4-local,
+ * ip4-udp-lookup nodes to speedup vxlan packet forwarding. This node will
+ * cause extra overhead to for non-vxlan packets which is kept at a minimum.
+ *
+ * @cliexpar
+ * @parblock
+ * Example of graph node before ip4-vxlan-bypass is enabled:
+ * @cliexstart{show vlib graph ip4-vxlan-bypass}
+ * Name Next Previous
+ * ip4-vxlan-bypass error-drop [0]
+ * vxlan4-input [1]
+ * ip4-lookup [2]
+ * @cliexend
+ *
+ * Example of how to enable ip4-vxlan-bypass on an interface:
+ * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0}
+ *
+ * Example of graph node after ip4-vxlan-bypass is enabled:
+ * @cliexstart{show vlib graph ip4-vxlan-bypass}
+ * Name Next Previous
+ * ip4-vxlan-bypass error-drop [0] ip4-input
+ * vxlan4-input [1] ip4-input-no-checksum
+ * ip4-lookup [2]
+ * @cliexend
+ *
+ * Example of how to display the feature enabed on an interface:
+ * @cliexstart{show ip interface features GigabitEthernet2/0/0}
+ * IP feature paths configured on GigabitEthernet2/0/0...
+ * ...
+ * ipv4 unicast:
+ * ip4-vxlan-bypass
+ * ip4-lookup
+ * ...
+ * @cliexend
+ *
+ * Example of how to disable ip4-vxlan-bypass on an interface:
+ * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0 del}
+ * @endparblock
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_interface_ip_vxlan_bypass_command, static) = {
+ .path = "set interface ip vxlan-bypass",
+ .function = set_ip4_vxlan_bypass,
+ .short_help = "set interface ip vxlan-bypass <interface> [del]",
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+set_ip6_vxlan_bypass (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ return set_ip_vxlan_bypass (1, input, cmd);
+}
+
+/*?
+ * This command adds the 'ip6-vxlan-bypass' graph node for a given interface.
+ * By adding the IPv6 vxlan-bypass graph node to an interface, the node checks
+ * for and validate input vxlan packet and bypass ip6-lookup, ip6-local,
+ * ip6-udp-lookup nodes to speedup vxlan packet forwarding. This node will
+ * cause extra overhead to for non-vxlan packets which is kept at a minimum.
+ *
+ * @cliexpar
+ * @parblock
+ * Example of graph node before ip6-vxlan-bypass is enabled:
+ * @cliexstart{show vlib graph ip6-vxlan-bypass}
+ * Name Next Previous
+ * ip6-vxlan-bypass error-drop [0]
+ * vxlan6-input [1]
+ * ip6-lookup [2]
+ * @cliexend
+ *
+ * Example of how to enable ip6-vxlan-bypass on an interface:
+ * @cliexcmd{set interface ip6 vxlan-bypass GigabitEthernet2/0/0}
+ *
+ * Example of graph node after ip6-vxlan-bypass is enabled:
+ * @cliexstart{show vlib graph ip6-vxlan-bypass}
+ * Name Next Previous
+ * ip6-vxlan-bypass error-drop [0] ip6-input
+ * vxlan6-input [1] ip4-input-no-checksum
+ * ip6-lookup [2]
+ * @cliexend
+ *
+ * Example of how to display the feature enabed on an interface:
+ * @cliexstart{show ip interface features GigabitEthernet2/0/0}
+ * IP feature paths configured on GigabitEthernet2/0/0...
+ * ...
+ * ipv6 unicast:
+ * ip6-vxlan-bypass
+ * ip6-lookup
+ * ...
+ * @cliexend
+ *
+ * Example of how to disable ip6-vxlan-bypass on an interface:
+ * @cliexcmd{set interface ip6 vxlan-bypass GigabitEthernet2/0/0 del}
+ * @endparblock
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_interface_ip6_vxlan_bypass_command, static) = {
+ .path = "set interface ip6 vxlan-bypass",
+ .function = set_ip6_vxlan_bypass,
+ .short_help = "set interface ip vxlan-bypass <interface> [del]",
+};
+/* *INDENT-ON* */
+
clib_error_t *vxlan_init (vlib_main_t *vm)
{
vxlan_main_t * vxm = &vxlan_main;