From a73395ae66c163ba2fefb39c558ea36972ef6406 Mon Sep 17 00:00:00 2001
From: Pavel Hrdina <phrdina@redhat.com>
Date: Wed, 4 Mar 2015 15:08:09 +0100
Subject: [PATCH] virutil: introduce helper functions for memory limits

The first one is to truncate the memory limit to
VIR_DOMAIN_MEMORY_PARAM_UNLIMITED if the value is greater and the second
one is to decide whether the memory limit is set or not, unlimited means
that it's not set.

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
---
 src/libvirt_private.syms |  2 ++
 src/util/virutil.c       | 24 ++++++++++++++++++++++++
 src/util/virutil.h       |  3 +++
 3 files changed, 29 insertions(+)

diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 3c6fd33a02..3590bd7371 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -2270,6 +2270,8 @@ virIsCapableVport;
 virIsDevMapperDevice;
 virIsSUID;
 virManageVport;
+virMemoryLimitIsSet;
+virMemoryLimitTruncate;
 virParseNumber;
 virParseOwnershipIds;
 virParseVersionString;
diff --git a/src/util/virutil.c b/src/util/virutil.c
index 4a95292f5e..599d59c4d3 100644
--- a/src/util/virutil.c
+++ b/src/util/virutil.c
@@ -2598,3 +2598,27 @@ long virGetSystemPageSizeKB(void)
         return val;
     return val / 1024;
 }
+
+/**
+ * virMemoryLimitTruncate
+ *
+ * Return truncated memory limit to VIR_DOMAIN_MEMORY_PARAM_UNLIMITED as maximum
+ * which means that the limit is not set => unlimited.
+ */
+unsigned long long
+virMemoryLimitTruncate(unsigned long long value)
+{
+    return value < VIR_DOMAIN_MEMORY_PARAM_UNLIMITED ? value :
+        VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
+}
+
+/**
+ * virMemoryLimitIsSet
+ *
+ * Returns true if the limit is set and false for unlimited value.
+ */
+bool
+virMemoryLimitIsSet(unsigned long long value)
+{
+    return value < VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
+}
diff --git a/src/util/virutil.h b/src/util/virutil.h
index d1173c1a11..b8f503681e 100644
--- a/src/util/virutil.h
+++ b/src/util/virutil.h
@@ -247,4 +247,7 @@ unsigned int virGetListenFDs(void);
 long virGetSystemPageSize(void);
 long virGetSystemPageSizeKB(void);
 
+unsigned long long virMemoryLimitTruncate(unsigned long long value);
+bool virMemoryLimitIsSet(unsigned long long value);
+
 #endif /* __VIR_UTIL_H__ */