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diff --git a/tools/libxen/include/xen_vm_metrics.h b/tools/libxen/include/xen_vm_metrics.h
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+++ b/tools/libxen/include/xen_vm_metrics.h
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+/*
+ * Copyright (c) 2006, XenSource Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ */
+
+#ifndef XEN_VM_METRICS_H
+#define XEN_VM_METRICS_H
+
+#include "xen_common.h"
+#include "xen_int_float_map.h"
+#include "xen_vm_decl.h"
+#include "xen_vm_metrics_decl.h"
+
+
+/*
+ * The VM_metrics class.
+ * 
+ * The metrics associated with a VM.
+ */
+
+
+/**
+ * Free the given xen_vm_metrics.  The given handle must have been
+ * allocated by this library.
+ */
+extern void
+xen_vm_metrics_free(xen_vm_metrics vm_metrics);
+
+
+typedef struct xen_vm_metrics_set
+{
+    size_t size;
+    xen_vm_metrics *contents[];
+} xen_vm_metrics_set;
+
+/**
+ * Allocate a xen_vm_metrics_set of the given size.
+ */
+extern xen_vm_metrics_set *
+xen_vm_metrics_set_alloc(size_t size);
+
+/**
+ * Free the given xen_vm_metrics_set.  The given set must have been
+ * allocated by this library.
+ */
+extern void
+xen_vm_metrics_set_free(xen_vm_metrics_set *set);
+
+
+typedef struct xen_vm_metrics_record
+{
+    xen_vm_metrics handle;
+    char *uuid;
+    struct xen_vm_record_opt *vm;
+    int64_t memory_actual;
+    int64_t vcpus_number;
+    xen_int_float_map *vcpus_utilisation;
+} xen_vm_metrics_record;
+
+/**
+ * Allocate a xen_vm_metrics_record.
+ */
+extern xen_vm_metrics_record *
+xen_vm_metrics_record_alloc(void);
+
+/**
+ * Free the given xen_vm_metrics_record, and all referenced values. 
+ * The given record must have been allocated by this library.
+ */
+extern void
+xen_vm_metrics_record_free(xen_vm_metrics_record *record);
+
+
+typedef struct xen_vm_metrics_record_opt
+{
+    bool is_record;
+    union
+    {
+        xen_vm_metrics handle;
+        xen_vm_metrics_record *record;
+    } u;
+} xen_vm_metrics_record_opt;
+
+/**
+ * Allocate a xen_vm_metrics_record_opt.
+ */
+extern xen_vm_metrics_record_opt *
+xen_vm_metrics_record_opt_alloc(void);
+
+/**
+ * Free the given xen_vm_metrics_record_opt, and all referenced values.
+ *  The given record_opt must have been allocated by this library.
+ */
+extern void
+xen_vm_metrics_record_opt_free(xen_vm_metrics_record_opt *record_opt);
+
+
+typedef struct xen_vm_metrics_record_set
+{
+    size_t size;
+    xen_vm_metrics_record *contents[];
+} xen_vm_metrics_record_set;
+
+/**
+ * Allocate a xen_vm_metrics_record_set of the given size.
+ */
+extern xen_vm_metrics_record_set *
+xen_vm_metrics_record_set_alloc(size_t size);
+
+/**
+ * Free the given xen_vm_metrics_record_set, and all referenced values.
+ *  The given set must have been allocated by this library.
+ */
+extern void
+xen_vm_metrics_record_set_free(xen_vm_metrics_record_set *set);
+
+
+
+typedef struct xen_vm_metrics_record_opt_set
+{
+    size_t size;
+    xen_vm_metrics_record_opt *contents[];
+} xen_vm_metrics_record_opt_set;
+
+/**
+ * Allocate a xen_vm_metrics_record_opt_set of the given size.
+ */
+extern xen_vm_metrics_record_opt_set *
+xen_vm_metrics_record_opt_set_alloc(size_t size);
+
+/**
+ * Free the given xen_vm_metrics_record_opt_set, and all referenced
+ * values.  The given set must have been allocated by this library.
+ */
+extern void
+xen_vm_metrics_record_opt_set_free(xen_vm_metrics_record_opt_set *set);
+
+
+/**
+ * Get a record containing the current state of the given VM_metrics.
+ */
+extern bool
+xen_vm_metrics_get_record(xen_session *session, xen_vm_metrics_record **result, xen_vm_metrics vm_metrics);
+
+
+/**
+ * Get a reference to the VM_metrics instance with the specified UUID.
+ */
+extern bool
+xen_vm_metrics_get_by_uuid(xen_session *session, xen_vm_metrics *result, char *uuid);
+
+
+/**
+ * Get the uuid field of the given VM_metrics.
+ */
+extern bool
+xen_vm_metrics_get_uuid(xen_session *session, char **result, xen_vm_metrics vm_metrics);
+
+
+/**
+ * Get the VM field of the given VM_metrics.
+ */
+extern bool
+xen_vm_metrics_get_vm(xen_session *session, xen_vm *result, xen_vm_metrics vm_metrics);
+
+
+/**
+ * Get the memory/actual field of the given VM_metrics.
+ */
+extern bool
+xen_vm_metrics_get_memory_actual(xen_session *session, int64_t *result, xen_vm_metrics vm_metrics);
+
+
+/**
+ * Get the VCPUs/number field of the given VM_metrics.
+ */
+extern bool
+xen_vm_metrics_get_vcpus_number(xen_session *session, int64_t *result, xen_vm_metrics vm_metrics);
+
+
+/**
+ * Get the VCPUs/utilisation field of the given VM_metrics.
+ */
+extern bool
+xen_vm_metrics_get_vcpus_utilisation(xen_session *session, xen_int_float_map **result, xen_vm_metrics vm_metrics);
+
+
+#endif