3 files changed, 64 insertions, 0 deletions
diff --git a/include/monitor/hmp.h b/include/monitor/hmp.h
index 96d014826a..2e89a97bd6 100644
--- a/include/monitor/hmp.h
+++ b/include/monitor/hmp.h
@@ -133,5 +133,6 @@ void hmp_info_dirty_rate(Monitor *mon, const QDict *qdict);
 void hmp_calc_dirty_rate(Monitor *mon, const QDict *qdict);
 void hmp_human_readable_text_helper(Monitor *mon,
                                     HumanReadableText *(*qmp_handler)(Error **));
+void hmp_info_stats(Monitor *mon, const QDict *qdict);
 
 #endif
diff --git a/include/monitor/stats.h b/include/monitor/stats.h
new file mode 100644
index 0000000000..fcf0983154
--- /dev/null
+++ b/include/monitor/stats.h
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2022 Oracle and/or its affiliates.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef STATS_H
+#define STATS_H
+
+#include "qapi/qapi-types-stats.h"
+
+typedef void StatRetrieveFunc(StatsResultList **result, StatsTarget target,
+                              strList *names, strList *targets, Error **errp);
+typedef void SchemaRetrieveFunc(StatsSchemaList **result, Error **errp);
+
+/*
+ * Register callbacks for the QMP query-stats command.
+ *
+ * @provider: stats provider checked against QMP command arguments
+ * @stats_fn: routine to query stats:
+ * @schema_fn: routine to query stat schemas:
+ */
+void add_stats_callbacks(StatsProvider provider,
+                         StatRetrieveFunc *stats_fn,
+                         SchemaRetrieveFunc *schemas_fn);
+
+/*
+ * Helper routines for adding stats entries to the results lists.
+ */
+void add_stats_entry(StatsResultList **, StatsProvider, const char *id,
+                     StatsList *stats_list);
+void add_stats_schema(StatsSchemaList **, StatsProvider, StatsTarget,
+                      StatsSchemaValueList *);
+
+/*
+ * True if a string matches the filter passed to the stats_fn callabck,
+ * false otherwise.
+ *
+ * Note that an empty list means no filtering, i.e. all strings will
+ * return true.
+ */
+bool apply_str_list_filter(const char *string, strList *list);
+
+#endif /* STATS_H */
diff --git a/include/qemu/cutils.h b/include/qemu/cutils.h
index 40e10e19a7..d3e532b64c 100644
--- a/include/qemu/cutils.h
+++ b/include/qemu/cutils.h
@@ -1,6 +1,24 @@
 #ifndef QEMU_CUTILS_H
 #define QEMU_CUTILS_H
 
+/*
+ * si_prefix:
+ * @exp10: exponent of 10, a multiple of 3 between -18 and 18 inclusive.
+ *
+ * Return a SI prefix (n, u, m, K, M, etc.) corresponding
+ * to the given exponent of 10.
+ */
+const char *si_prefix(unsigned int exp10);
+
+/*
+ * iec_binary_prefix:
+ * @exp2: exponent of 2, a multiple of 10 between 0 and 60 inclusive.
+ *
+ * Return an IEC binary prefix (Ki, Mi, etc.) corresponding
+ * to the given exponent of 2.
+ */
+const char *iec_binary_prefix(unsigned int exp2);
+
 /**
  * pstrcpy:
  * @buf: buffer to copy string into