bgpd: add srv6 vpn base code (step4)

This commit add base-lines for BGP SRv6 VPN support. srv6_locator_chunks property of struct bgp is used to store BGPd's own SRv6 locator chunk getting with ZEBRA_SRV6_MANAGER_GET_LOCATOR_CHUNK api. And srv6_functions is used to store BGP's srv6 localsids. It's mainly used when new SID reservation from locator chunks. Signed-off-by: Hiroki Shirokura <slank.dev@gmail.com> base
donaldsharp · Jun 2, 2021 · 92a9e6f · 92a9e6f
1 parent bc65dfa
commit 92a9e6f
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Showing 5 changed files with 41 additions and 0 deletions.
diff --git a/bgpd/bgp_memory.c b/bgpd/bgp_memory.c
@@ -142,3 +142,5 @@ DEFINE_MTYPE(BGPD, BGP_FLOWSPEC_INDEX, "BGP flowspec index");
 
 DEFINE_MTYPE(BGPD, BGP_SRV6_L3VPN, "BGP prefix-sid srv6 l3vpn servcie");
 DEFINE_MTYPE(BGPD, BGP_SRV6_VPN, "BGP prefix-sid srv6 vpn service");
+DEFINE_MTYPE(BGPD, BGP_SRV6_SID, "BGP srv6 segment-id");
+DEFINE_MTYPE(BGPD, BGP_SRV6_FUNCTION, "BGP srv6 function");
diff --git a/bgpd/bgp_memory.h b/bgpd/bgp_memory.h
@@ -139,5 +139,7 @@ DECLARE_MTYPE(BGP_FLOWSPEC_INDEX);
 
 DECLARE_MTYPE(BGP_SRV6_L3VPN);
 DECLARE_MTYPE(BGP_SRV6_VPN);
+DECLARE_MTYPE(BGP_SRV6_SID);
+DECLARE_MTYPE(BGP_SRV6_FUNCTION);
 
 #endif /* _QUAGGA_BGP_MEMORY_H */
diff --git a/bgpd/bgp_vty.c b/bgpd/bgp_vty.c
@@ -9865,6 +9865,7 @@ DEFUN_NOSH (bgp_segment_routing_srv6,
             "Segment-Routing SRv6 configuration\n")
 {
 	VTY_DECLVAR_CONTEXT(bgp, bgp);
+	bgp->srv6_enabled = true;
 	vty->node = BGP_SRV6_NODE;
 	return CMD_SUCCESS;
 }

diff --git a/bgpd/bgpd.c b/bgpd/bgpd.c
@@ -1327,6 +1327,20 @@ int bgp_peer_gr_init(struct peer *peer)
 	return BGP_GR_SUCCESS;
 }
 
+static void bgp_srv6_init(struct bgp *bgp)
+{
+	bgp->srv6_enabled = false;
+	memset(bgp->srv6_locator_name, 0, sizeof(bgp->srv6_locator_name));
+	bgp->srv6_locator_chunks = list_new();
+	bgp->srv6_functions = list_new();
+}
+
+static void bgp_srv6_cleanup(struct bgp *bgp)
+{
+	list_delete(&bgp->srv6_locator_chunks);
+	list_delete(&bgp->srv6_functions);
+}
+
 /* Allocate new peer object, implicitely locked.  */
 struct peer *peer_new(struct bgp *bgp)
 {
@@ -3238,6 +3252,7 @@ static struct bgp *bgp_create(as_t *as, const char *name,
 	bgp_evpn_init(bgp);
 	bgp_evpn_vrf_es_init(bgp);
 	bgp_pbr_init(bgp);
+	bgp_srv6_init(bgp);
 
 	/*initilize global GR FSM */
 	bgp_global_gr_init(bgp);
@@ -3754,6 +3769,7 @@ void bgp_free(struct bgp *bgp)
 
 	bgp_evpn_cleanup(bgp);
 	bgp_pbr_cleanup(bgp);
+	bgp_srv6_cleanup(bgp);
 	XFREE(MTYPE_BGP_EVPN_INFO, bgp->evpn_info);
 
 	for (afi = AFI_IP; afi < AFI_MAX; afi++) {

diff --git a/bgpd/bgpd.h b/bgpd/bgpd.h
@@ -29,6 +29,7 @@
 #include "lib/json.h"
 #include "vrf.h"
 #include "vty.h"
+#include "srv6.h"
 #include "iana_afi.h"
 
 /* For union sockunion.  */
@@ -222,6 +223,7 @@ struct vpn_policy {
 #define BGP_VPN_POLICY_TOVPN_LABEL_AUTO        (1 << 0)
 #define BGP_VPN_POLICY_TOVPN_RD_SET            (1 << 1)
 #define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET       (1 << 2)
+#define BGP_VPN_POLICY_TOVPN_SID_AUTO          (1 << 3)
 
 	/*
 	 * If we are importing another vrf into us keep a list of
@@ -234,6 +236,13 @@ struct vpn_policy {
 	 * vrf names that we are being exported to.
 	 */
 	struct list *export_vrf;
+
+	/*
+	 * Segment-Routing SRv6 Mode
+	 */
+	uint32_t tovpn_sid_index; /* unset => set to 0 */
+	struct in6_addr *tovpn_sid;
+	struct in6_addr *tovpn_zebra_vrf_sid_last_sent;
 };
 
 /*
@@ -322,6 +331,11 @@ struct bgp_snmp_stats {
 	uint32_t routes_deleted;
 };
 
+struct bgp_srv6_function {
+	struct in6_addr sid;
+	char locator_name[SRV6_LOCNAME_SIZE];
+};
+
 /* BGP instance structure.  */
 struct bgp {
 	/* AS number of this BGP instance.  */
@@ -718,6 +732,12 @@ struct bgp {
 	/* BGP route flap dampening configuration */
 	struct bgp_damp_config damp[AFI_MAX][SAFI_MAX];
 
+	/* BGP VPN SRv6 backend */
+	bool srv6_enabled;
+	char srv6_locator_name[SRV6_LOCNAME_SIZE];
+	struct list *srv6_locator_chunks;
+	struct list *srv6_functions;
+
 	QOBJ_FIELDS;
 };
 DECLARE_QOBJ_TYPE(bgp);