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authorBenoît Ganne <bganne@cisco.com>2019-06-26 13:36:51 +0200
committerNeale Ranns <nranns@cisco.com>2019-07-02 14:19:07 +0000
commitcfc7a107e6cb8be6e7c53a08e23a146c431c8e90 (patch)
tree2179e92193ce7453b6eb67ba94a3c881f998f4fc /src/plugins/gbp/gbp_ext_itf.c
parent2ec825937b7ac856f67d086ce6814dd21c5e9bd7 (diff)
gbp: add anonymous l3-out external interfaces
So far, GBP l3-out packets classification & policy relied on programmed EP. All traffic to/from l3-out must go through a known EP. This patch introduces a new feature where l3-out next-hops are only known by their subnets (l3-out prefixes). As there are no longer known EPs to program, an interface must be configured as external anonymous l3-out. Packets classification & policy on this interface will rely on the external subnets programmed in the BD VRF. Note that contrary to all other interfaces in a GBP BD, external anonymous l3-out interfaces have BD L2 learning turned on and rely on ARP/ND. Type: feature Change-Id: Ieedb29dff4e967d08c4301e82d06bff450a63e5f Signed-off-by: Benoît Ganne <bganne@cisco.com>
Diffstat (limited to 'src/plugins/gbp/gbp_ext_itf.c')
-rw-r--r--src/plugins/gbp/gbp_ext_itf.c114
1 files changed, 114 insertions, 0 deletions
diff --git a/src/plugins/gbp/gbp_ext_itf.c b/src/plugins/gbp/gbp_ext_itf.c
index be2d614e1fa..89bcb3da49e 100644
--- a/src/plugins/gbp/gbp_ext_itf.c
+++ b/src/plugins/gbp/gbp_ext_itf.c
@@ -130,6 +130,120 @@ gbp_ext_itf_delete (u32 sw_if_index)
return (VNET_API_ERROR_NO_SUCH_ENTRY);
}
+int
+gbp_ext_itf_anon_add (u32 sw_if_index, u32 bd_id, u32 rd_id)
+{
+ int rv = gbp_ext_itf_add (sw_if_index, bd_id, rd_id);
+ if (rv)
+ return rv;
+ /* add interface to the BD */
+ index_t itf = gbp_itf_add_and_lock (sw_if_index, bd_id);
+ /* setup GBP L2 features on this interface */
+ gbp_itf_set_l2_input_feature (itf, 0,
+ L2INPUT_FEAT_GBP_LPM_ANON_CLASSIFY |
+ L2INPUT_FEAT_LEARN);
+ gbp_itf_set_l2_output_feature (itf, 0, L2OUTPUT_FEAT_GBP_POLICY_LPM);
+ return 0;
+}
+
+int
+gbp_ext_itf_anon_delete (u32 sw_if_index)
+{
+ int rv = gbp_ext_itf_delete (sw_if_index);
+ if (rv)
+ return rv;
+ gbp_itf_unlock (sw_if_index);
+ return 0;
+}
+
+static clib_error_t *
+gbp_ext_itf_add_del_cli (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ u32 sw_if_index = ~0, bd_id = ~0, rd_id = ~0;
+ int add = 1, anon = 0;
+ int rv;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "del"))
+ add = 0;
+ else
+ if (unformat
+ (line_input, "%U", unformat_vnet_sw_interface, vnet_get_main (),
+ &sw_if_index))
+ ;
+ else if (unformat (line_input, "bd %d", &bd_id))
+ ;
+ else if (unformat (line_input, "rd %d", &rd_id))
+ ;
+ else if (unformat (line_input, "anon-l3-out"))
+ anon = 1;
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ }
+ unformat_free (line_input);
+
+ if (~0 == sw_if_index)
+ return clib_error_return (0, "interface must be specified");
+
+ if (add)
+ {
+ if (~0 == bd_id)
+ return clib_error_return (0, "BD-ID must be specified");
+ if (~0 == rd_id)
+ return clib_error_return (0, "RD-ID must be specified");
+ if (anon)
+ rv = gbp_ext_itf_anon_add (sw_if_index, bd_id, rd_id);
+ else
+ rv = gbp_ext_itf_add (sw_if_index, bd_id, rd_id);
+ }
+ else
+ {
+ if (anon)
+ rv = gbp_ext_itf_anon_delete (sw_if_index);
+ else
+ rv = gbp_ext_itf_delete (sw_if_index);
+ }
+
+ switch (rv)
+ {
+ case 0:
+ return 0;
+ case VNET_API_ERROR_ENTRY_ALREADY_EXISTS:
+ return clib_error_return (0, "interface already exists");
+ case VNET_API_ERROR_NO_SUCH_ENTRY: /* fallthrough */
+ case VNET_API_ERROR_INVALID_SW_IF_INDEX:
+ return clib_error_return (0, "unknown interface");
+ default:
+ return clib_error_return (0, "error %d", rv);
+ }
+
+ /* never reached */
+ return 0;
+}
+
+/*?
+ * Add Group Based Interface as anonymous L3out interface
+ *
+ * @cliexpar
+ * @cliexstart{gbp interface [del] anon-l3out <interface> bd <ID>}
+ * @cliexend
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (gbp_itf_anon_l3out_add_del_node, static) = {
+ .path = "gbp ext-itf",
+ .short_help = "gbp ext-itf [del] <interface> bd <ID> rd <ID> [anon-l3-out]\n",
+ .function = gbp_ext_itf_add_del_cli,
+};
+/* *INDENT-ON* */
+
void
gbp_ext_itf_walk (gbp_ext_itf_cb_t cb, void *ctx)
{