zebra: Add functions to alloc/release SRv6 SIDs

Add functions to allocate/release SRv6 SIDs. SIDs can be allocated
either explicitly (allocate a specific SID) or dynamically (allocate any
available SID).

Signed-off-by: Carmine Scarpitta <cscarpit@cisco.com>

zebra/zapi_msg.c

@@ -1149,7 +1149,7 @@ int zsend_zebra_srv6_locator_add(struct zserv *client, struct srv6_locator *loc)
 		locator.node_bits_length = format->node_len;
 		locator.function_bits_length = format->function_len;
 		locator.argument_bits_length = format->argument_len;
-		if (format->type == ZEBRA_SRV6_SID_FORMAT_TYPE_USID)
+		if (format->type == SRV6_SID_FORMAT_TYPE_USID)
 			SET_FLAG(locator.flags, SRV6_LOCATOR_USID);
 	}
 

zebra/zebra_errors.c

@@ -787,6 +787,18 @@ static struct log_ref ferr_zebra_err[] = {
 		.suggestion =
 			"Wait for Zebra to reattempt update.",
 	},
+	{
+		.code = EC_ZEBRA_SM_CANNOT_ASSIGN_SID,
+		.title = "SRv6 manager unable to assign SID",
+		.description = "Zebra's SRv6 manager was unable to assign a SID to client.",
+		.suggestion = "Ensure that Zebra has a sufficient SID range available.",
+	},
+	{
+		.code = EC_ZEBRA_SM_DAEMON_MISMATCH,
+		.title = "Daemon mismatch when releasing SRV6 SIDs",
+		.description = "Zebra noticed a mismatch between a SRv6 SID and a protocol daemon number or instance when releasing unused SRv6 SIDs.",
+		.suggestion = "Ignore this error.",
+	},
 	{
 		.code = END_FERR,
 	}

zebra/zebra_errors.h

@@ -124,6 +124,8 @@ enum zebra_log_refs {
 	EC_ZEBRA_GRE_SET_UPDATE,
 	EC_ZEBRA_SRV6M_UNRELEASED_LOCATOR_CHUNK,
 	EC_ZEBRA_INTF_UPDATE_FAILURE,
+	EC_ZEBRA_SM_CANNOT_ASSIGN_SID,
+	EC_ZEBRA_SM_DAEMON_MISMATCH,
 };
 
 void zebra_error_init(void);