Add support for SRv6 SID Manager

doc/user/zebra.rst

@@ -1021,6 +1021,35 @@ and this section also helps that case.
       !
    ...
 
+.. clicmd:: format NAME
+
+   Specify the SID allocation schema for the SIDs allocated from this locator. Currently,
+   FRR supports supports the following allocation schemas:
+
+   - `usid-f3216`
+   - `uncompressed`
+
+::
+
+   router# configure terminal
+   router(config)# segment-routinig
+   router(config-sr)# srv6
+   router(config-srv6)# locators
+   router(config-srv6-locators)# locator loc1
+   router(config-srv6-locator)# prefix fc00:0:1::/48
+   router(config-srv6-locator)# format usid-f3216
+
+   router(config-srv6-locator)# show run
+   ...
+   segment-routing
+    srv6
+     locators
+      locator loc1
+       prefix fc00:0:1::/48
+       format usid-f3216
+      !
+   ...
+
 .. clicmd:: encapsulation
 
    Configure parameters for SRv6 encapsulation.
@@ -1029,6 +1058,61 @@ and this section also helps that case.
 
    Configure the source address of the outer encapsulating IPv6 header.
 
+.. clicmd:: formats
+
+   Configure SRv6 SID formats.
+
+.. clicmd:: format NAME
+
+   Configure SRv6 SID format.
+
+.. clicmd:: compressed usid
+
+   Enable SRv6 uSID compression and configure SRv6 uSID compression parameters.
+
+.. clicmd:: local-id-block start START
+
+   Configure the start value for the Local ID Block (LIB).
+
+.. clicmd:: local-id-block explicit start START end END
+
+   Configure the start/end values for the Explicit LIB (ELIB).
+
+.. clicmd:: wide-local-id-block start START end END
+
+   Configure the start/end values for the Wide LIB (W-LIB).
+
+.. clicmd:: wide-local-id-block explicit start START
+
+   Configure the start value for the Explicit Wide LIB (EW-LIB).
+
+::
+
+   router# configure terminal
+   router(config)# segment-routinig
+   router(config-sr)# srv6
+   router(config-srv6)# formats
+   router(config-srv6-formats)# format usid-f3216
+   router(config-srv6-format)# compressed usid
+   router(config-srv6-format-usid)# local-id-block start 0xD000
+   router(config-srv6-format-usid)# local-id-block explicit start 0xF000 end 0xFDFF
+   router(config-srv6-format-usid)# wide-local-id-block start 0xFFF4 end 0xFFF5
+   router(config-srv6-format-usid)# wide-local-id-block explicit start 0xFFF4
+
+   router(config-srv6-locator)# show run
+   ...
+   segment-routing
+    srv6
+     formats
+      format usid-f3216
+       compressed usid
+        local-id-block start 0xD000
+        local-id-block explicit start 0xF000 end 0xFDFF
+        wide-local-id-block start 0xFFF4 end 0xFFF5
+        wide-local-id-block explicit start 0xFFF4
+      !
+   ...
+
 .. _multicast-rib-commands:
 
 Multicast RIB Commands

lib/command.h

@@ -161,6 +161,9 @@ enum node_type {
 	SRV6_LOCS_NODE,		 /* SRv6 locators node */
 	SRV6_LOC_NODE,		 /* SRv6 locator node */
 	SRV6_ENCAP_NODE,		 /* SRv6 encapsulation node */
+	SRV6_SID_FORMATS_NODE,		 /* SRv6 SID formats config node */
+	SRV6_SID_FORMAT_NODE,		 /* SRv6 SID format config node */
+	SRV6_SID_FORMAT_USID_NODE,		 /* SRv6 SID compressed uSID format config node */
 	VTY_NODE,		 /* Vty node. */
 	FPM_NODE,		 /* Dataplane FPM node. */
 	LINK_PARAMS_NODE,	/* Link-parameters node */

lib/log.c

@@ -436,6 +436,9 @@ static const struct zebra_desc_table command_types[] = {
 	DESC_ENTRY(ZEBRA_SRV6_LOCATOR_DELETE),
 	DESC_ENTRY(ZEBRA_SRV6_MANAGER_GET_LOCATOR_CHUNK),
 	DESC_ENTRY(ZEBRA_SRV6_MANAGER_RELEASE_LOCATOR_CHUNK),
+	DESC_ENTRY(ZEBRA_SRV6_MANAGER_GET_LOCATOR),
+	DESC_ENTRY(ZEBRA_SRV6_MANAGER_GET_SRV6_SID),
+	DESC_ENTRY(ZEBRA_SRV6_MANAGER_RELEASE_SRV6_SID),
 	DESC_ENTRY(ZEBRA_ERROR),
 	DESC_ENTRY(ZEBRA_CLIENT_CAPABILITIES),
 	DESC_ENTRY(ZEBRA_OPAQUE_MESSAGE),
@@ -461,7 +464,8 @@ static const struct zebra_desc_table command_types[] = {
 	DESC_ENTRY(ZEBRA_TC_CLASS_DELETE),
 	DESC_ENTRY(ZEBRA_TC_FILTER_ADD),
 	DESC_ENTRY(ZEBRA_TC_FILTER_DELETE),
-	DESC_ENTRY(ZEBRA_OPAQUE_NOTIFY)
+	DESC_ENTRY(ZEBRA_OPAQUE_NOTIFY),
+	DESC_ENTRY(ZEBRA_SRV6_SID_NOTIFY)
 };
 #undef DESC_ENTRY
 

lib/srv6.c

@@ -12,6 +12,7 @@
 DEFINE_QOBJ_TYPE(srv6_locator);
 DEFINE_MTYPE_STATIC(LIB, SRV6_LOCATOR, "SRV6 locator");
 DEFINE_MTYPE_STATIC(LIB, SRV6_LOCATOR_CHUNK, "SRV6 locator chunk");
+DEFINE_MTYPE_STATIC(LIB, SRV6_SID_CTX, "SRv6 SID context");
 
 const char *seg6local_action2str(uint32_t action)
 {
@@ -154,6 +155,29 @@ void srv6_locator_chunk_free(struct srv6_locator_chunk **chunk)
 	XFREE(MTYPE_SRV6_LOCATOR_CHUNK, *chunk);
 }
 
+struct srv6_sid_ctx *srv6_sid_ctx_alloc(enum seg6local_action_t behavior,
+					struct in_addr *nh4,
+					struct in6_addr *nh6, vrf_id_t vrf_id)
+{
+	struct srv6_sid_ctx *ctx = NULL;
+
+	ctx = XCALLOC(MTYPE_SRV6_SID_CTX, sizeof(struct srv6_sid_ctx));
+	ctx->behavior = behavior;
+	if (nh4)
+		ctx->nh4 = *nh4;
+	if (nh6)
+		ctx->nh6 = *nh6;
+	if (vrf_id)
+		ctx->vrf_id = vrf_id;
+
+	return ctx;
+}
+
+void srv6_sid_ctx_free(struct srv6_sid_ctx *ctx)
+{
+	XFREE(MTYPE_SRV6_SID_CTX, ctx);
+}
+
 json_object *srv6_locator_chunk_json(const struct srv6_locator_chunk *chunk)
 {
 	json_object *jo_root = NULL;

lib/srv6.h

@@ -127,6 +127,12 @@ struct srv6_locator {
 	uint8_t flags;
 #define SRV6_LOCATOR_USID (1 << 0) /* The SRv6 Locator is a uSID Locator */
 
+	/* Pointer to the SID format. */
+	void *sid_format;
+
+	/* Pointer to the parent SID block of the locator. */
+	void *sid_block;
+
 	QOBJ_FIELDS;
 };
 DECLARE_QOBJ_TYPE(srv6_locator);
@@ -183,6 +189,17 @@ struct nexthop_srv6 {
 	struct seg6_seg_stack *seg6_segs;
 };
 
+/* Context for an SRv6 SID */
+struct srv6_sid_ctx {
+	/* Behavior associated with the SID */
+	enum seg6local_action_t behavior;
+
+	/* Behavior-specific attributes */
+	struct in_addr nh4;
+	struct in6_addr nh6;
+	vrf_id_t vrf_id;
+};
+
 static inline const char *seg6_mode2str(enum seg6_mode_t mode)
 {
 	switch (mode) {
@@ -246,6 +263,54 @@ const char *seg6local_context2str(char *str, size_t size,
 				  const struct seg6local_context *ctx,
 				  uint32_t action);
 
+static inline const char *srv6_sid_ctx2str(char *str, size_t size,
+					   const struct srv6_sid_ctx *ctx)
+{
+	int len = 0;
+
+	len += snprintf(str + len, size - len, "%s",
+			seg6local_action2str(ctx->behavior));
+
+	switch (ctx->behavior) {
+	case ZEBRA_SEG6_LOCAL_ACTION_UNSPEC:
+		break;
+
+	case ZEBRA_SEG6_LOCAL_ACTION_END:
+		len += snprintf(str + len, size - len, " USP");
+		break;
+
+	case ZEBRA_SEG6_LOCAL_ACTION_END_X:
+	case ZEBRA_SEG6_LOCAL_ACTION_END_DX6:
+		len += snprintfrr(str + len, size - len, " nh6 %pI6", &ctx->nh6);
+		break;
+
+	case ZEBRA_SEG6_LOCAL_ACTION_END_DX4:
+		len += snprintfrr(str + len, size - len, " nh4 %pI4", &ctx->nh4);
+		break;
+
+	case ZEBRA_SEG6_LOCAL_ACTION_END_T:
+	case ZEBRA_SEG6_LOCAL_ACTION_END_DT6:
+	case ZEBRA_SEG6_LOCAL_ACTION_END_DT4:
+	case ZEBRA_SEG6_LOCAL_ACTION_END_DT46:
+		len += snprintf(str + len, size - len, " vrf_id %u",
+				ctx->vrf_id);
+		break;
+
+	case ZEBRA_SEG6_LOCAL_ACTION_END_DX2:
+	case ZEBRA_SEG6_LOCAL_ACTION_END_B6:
+	case ZEBRA_SEG6_LOCAL_ACTION_END_B6_ENCAP:
+	case ZEBRA_SEG6_LOCAL_ACTION_END_BM:
+	case ZEBRA_SEG6_LOCAL_ACTION_END_S:
+	case ZEBRA_SEG6_LOCAL_ACTION_END_AS:
+	case ZEBRA_SEG6_LOCAL_ACTION_END_AM:
+	case ZEBRA_SEG6_LOCAL_ACTION_END_BPF:
+	default:
+		len += snprintf(str + len, size - len, " unknown(%s)", __func__);
+	}
+
+	return str;
+}
+
 int snprintf_seg6_segs(char *str,
 		size_t size, const struct seg6_segs *segs);
 
@@ -260,6 +325,12 @@ json_object *srv6_locator_detailed_json(const struct srv6_locator *loc);
 json_object *
 srv6_locator_chunk_detailed_json(const struct srv6_locator_chunk *chunk);
 
+extern struct srv6_sid_ctx *srv6_sid_ctx_alloc(enum seg6local_action_t behavior,
+					       struct in_addr *nh4,
+					       struct in6_addr *nh6,
+					       vrf_id_t vrf_id);
+extern void srv6_sid_ctx_free(struct srv6_sid_ctx *ctx);
+
 #ifdef __cplusplus
 }
 #endif