patch : add autort as derivation

pending upstream
https://github.com/FRRouting/frr/pull/7535/

This is for ebgp, to avoid to reload frr each time
when we define new vxlan.

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>

debian/patches/pve/0002-bgpd-add-an-option-for-RT-auto-derivation-to-force-A.patch

@@ -0,0 +1,151 @@
+From c3e66b067564281a58fcf3b99559d289a75090e9 Mon Sep 17 00:00:00 2001
+From: Alexandre Derumier <aderumier@odiso.com>
+Date: Tue, 17 Nov 2020 06:01:26 +0100
+Subject: [PATCH 1/3] bgpd : add an option for RT auto-derivation to force AS
+
+Allow to define a custom AS for autort AS:VNI
+
+Usefull for evpn with ebgp, where we can't auto-derivated from the router AS,
+as route-target AS:VNI need to be the same on the each peer
+
+Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
+---
+ bgpd/bgp_evpn.c     | 12 +++++++++--
+ bgpd/bgp_evpn_vty.c | 49 +++++++++++++++++++++++++++++++--------------
+ bgpd/bgpd.h         |  3 +++
+ 3 files changed, 47 insertions(+), 17 deletions(-)
+
+diff --git a/bgpd/bgp_evpn.c b/bgpd/bgp_evpn.c
+index 84e8960ee..73acc5d7b 100644
+--- a/bgpd/bgp_evpn.c
++++ b/bgpd/bgp_evpn.c
+@@ -512,7 +512,11 @@ static void form_auto_rt(struct bgp *bgp, vni_t vni, struct list *rtl)
+ 
+ 	if (bgp->advertise_autort_rfc8365)
+ 		vni |= EVPN_AUTORT_VXLAN;
+-	encode_route_target_as((bgp->as & 0xFFFF), vni, &eval);
++	if (bgp->autort_as) {
++		encode_route_target_as((bgp->autort_as & 0xFFFF), vni, &eval);
++	} else {
++		encode_route_target_as((bgp->as & 0xFFFF), vni, &eval);
++	}
+ 
+ 	ecomadd = ecommunity_new();
+ 	ecommunity_add_val(ecomadd, &eval, false, false);
+@@ -4238,7 +4242,11 @@ void evpn_rt_delete_auto(struct bgp *bgp, vni_t vni, struct list *rtl)
+ 
+ 	if (bgp->advertise_autort_rfc8365)
+ 		vni |= EVPN_AUTORT_VXLAN;
+-	encode_route_target_as((bgp->as & 0xFFFF), vni, &eval);
++	if (bgp->autort_as) {
++		encode_route_target_as((bgp->autort_as & 0xFFFF), vni, &eval);
++	} else {
++		encode_route_target_as((bgp->as & 0xFFFF), vni, &eval);
++	}
+ 
+ 	ecom_auto = ecommunity_new();
+ 	ecommunity_add_val(ecom_auto, &eval, false, false);
+diff --git a/bgpd/bgp_evpn_vty.c b/bgpd/bgp_evpn_vty.c
+index e9e2aafeb..6cc6bba33 100644
+--- a/bgpd/bgp_evpn_vty.c
++++ b/bgpd/bgp_evpn_vty.c
+@@ -3226,32 +3226,48 @@ DEFUN (no_bgp_evpn_advertise_all_vni,
+ 	return CMD_SUCCESS;
+ }
+ 
+-DEFUN (bgp_evpn_advertise_autort_rfc8365,
+-       bgp_evpn_advertise_autort_rfc8365_cmd,
+-       "autort rfc8365-compatible",
+-       "Auto-derivation of RT\n"
+-       "Auto-derivation of RT using RFC8365\n")
++DEFPY(bgp_evpn_advertise_autort, bgp_evpn_advertise_autort_cmd,
++      "autort [rfc8365-compatible]$rfc8365 [as (1-65536)$as]",
++      "Auto-derivation of RT\n"
++      "Auto-derivation of RT using RFC8365\n"
++      "Auto-derivation AS\n")
+ {
+ 	struct bgp *bgp = VTY_GET_CONTEXT(bgp);
+ 
+ 	if (!bgp)
+ 		return CMD_WARNING;
+-	evpn_set_advertise_autort_rfc8365(bgp);
++
++	if (as) {
++		bgp->autort_as = as;
++		bgp_evpn_handle_autort_change(bgp);
++	}
++
++	if (rfc8365)
++		evpn_set_advertise_autort_rfc8365(bgp);
++
+ 	return CMD_SUCCESS;
+ }
+ 
+-DEFUN (no_bgp_evpn_advertise_autort_rfc8365,
+-       no_bgp_evpn_advertise_autort_rfc8365_cmd,
+-       "no autort rfc8365-compatible",
+-       NO_STR
+-       "Auto-derivation of RT\n"
+-       "Auto-derivation of RT using RFC8365\n")
++DEFPY(no_bgp_evpn_advertise_autort, no_bgp_evpn_advertise_autort_cmd,
++      "no autort [rfc8365-compatible]$rfc8365 [as (1-65536)$as]",
++      NO_STR
++      "Auto-derivation of RT\n"
++      "Auto-derivation of RT using RFC8365\n"
++      "Auto-derivation AS\n")
+ {
+ 	struct bgp *bgp = VTY_GET_CONTEXT(bgp);
+ 
+ 	if (!bgp)
+ 		return CMD_WARNING;
+-	evpn_unset_advertise_autort_rfc8365(bgp);
++
++	if (as) {
++		bgp->autort_as = 0;
++		bgp_evpn_handle_autort_change(bgp);
++	}
++
++	if (rfc8365)
++		evpn_unset_advertise_autort_rfc8365(bgp);
++
+ 	return CMD_SUCCESS;
+ }
+ 
+@@ -5596,6 +5612,9 @@ void bgp_config_write_evpn_info(struct vty *vty, struct bgp *bgp, afi_t afi,
+ 	if (bgp->advertise_autort_rfc8365)
+ 		vty_out(vty, "  autort rfc8365-compatible\n");
+ 
++	if (bgp->autort_as)
++		vty_out(vty, "  autort as %u\n", bgp->autort_as);
++
+ 	if (bgp->advertise_gw_macip)
+ 		vty_out(vty, "  advertise-default-gw\n");
+ 
+@@ -5732,8 +5751,8 @@ void bgp_ethernetvpn_init(void)
+ 	install_element(BGP_EVPN_NODE, &evpnrt5_network_cmd);
+ 	install_element(BGP_EVPN_NODE, &bgp_evpn_advertise_all_vni_cmd);
+ 	install_element(BGP_EVPN_NODE, &no_bgp_evpn_advertise_all_vni_cmd);
+-	install_element(BGP_EVPN_NODE, &bgp_evpn_advertise_autort_rfc8365_cmd);
+-	install_element(BGP_EVPN_NODE, &no_bgp_evpn_advertise_autort_rfc8365_cmd);
++	install_element(BGP_EVPN_NODE, &bgp_evpn_advertise_autort_cmd);
++	install_element(BGP_EVPN_NODE, &no_bgp_evpn_advertise_autort_cmd);
+ 	install_element(BGP_EVPN_NODE, &bgp_evpn_advertise_default_gw_cmd);
+ 	install_element(BGP_EVPN_NODE, &no_bgp_evpn_advertise_default_gw_cmd);
+ 	install_element(BGP_EVPN_NODE, &bgp_evpn_advertise_svi_ip_cmd);
+diff --git a/bgpd/bgpd.h b/bgpd/bgpd.h
+index d22fd008d..941066e2e 100644
+--- a/bgpd/bgpd.h
++++ b/bgpd/bgpd.h
+@@ -614,6 +614,9 @@ struct bgp {
+ 	/* EVPN - use RFC 8365 to auto-derive RT */
+ 	int advertise_autort_rfc8365;
+ 
++	/* EVPN - auto-derive RT AS */
++	uint16_t autort_as;
++
+ 	/*
+ 	 * Flooding mechanism for BUM packets for VxLAN-EVPN.
+ 	 */
+-- 
+2.20.1
+

debian/patches/series

@@ -1 +1,2 @@
 pve/0001-enable-bgp-daemon.patch
+pve/0002-bgpd-add-an-option-for-RT-auto-derivation-to-force-A.patch