File 95c95f1b-virml-Introduce-VIR_XML_PROP_NONNEGATIVE-flag.patch of Package libvirt.33033

From 65c77b0d8e7a47926641d3d32c83cd076960ef9b Mon Sep 17 00:00:00 2001
From: Michal Privoznik <mprivozn@redhat.com>
Date: Mon, 7 Mar 2022 16:44:46 +0100
Subject: [PATCH 1/9] virml: Introduce VIR_XML_PROP_NONNEGATIVE flag

For easier attribute parsing we have virXMLProp*() family of
functions. These accept flags through which a caller can pose
some conditions onto the attribute value, for instance:
VIR_XML_PROP_NONZERO when the attribute may not be zero, etc.

What we are missing is VIR_XML_PROP_NONNEGATIVE when the
attribute value may be non-negative. Obviously, this flag makes
sense only for some members of the virXMLProp*() family.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
(cherry picked from commit 95c95f1b756b92db4ceb4ba4446330126a7d7e1e)
---
 src/util/virxml.c | 7 +++++++
 src/util/virxml.h | 3 +++
 2 files changed, 10 insertions(+)

Index: libvirt-8.0.0/src/util/virxml.c
===================================================================
--- libvirt-8.0.0.orig/src/util/virxml.c
+++ libvirt-8.0.0/src/util/virxml.c
@@ -625,6 +625,13 @@ virXMLPropInt(xmlNodePtr node,
         return -1;
     }
 
+    if ((flags & VIR_XML_PROP_NONNEGATIVE) && (val < 0)) {
+        virReportError(VIR_ERR_XML_ERROR,
+                       _("Invalid value for attribute '%s' in element '%s': '%s'. Expected non-negative value"),
+                       name, node->name, tmp);
+        return -1;
+    }
+
     if ((flags & VIR_XML_PROP_NONZERO) && (val == 0)) {
         virReportError(VIR_ERR_XML_ERROR,
                        _("Invalid value for attribute '%s' in element '%s': Zero is not permitted"),
Index: libvirt-8.0.0/src/util/virxml.h
===================================================================
--- libvirt-8.0.0.orig/src/util/virxml.h
+++ libvirt-8.0.0/src/util/virxml.h
@@ -38,6 +38,9 @@ typedef enum {
     VIR_XML_PROP_NONE = 0,
     VIR_XML_PROP_REQUIRED = 1 << 0, /* Attribute may not be absent */
     VIR_XML_PROP_NONZERO = 1 << 1, /* Attribute may not be zero */
+    VIR_XML_PROP_NONNEGATIVE = 1 << 2, /* Attribute may not be negative, makes
+                                          sense only for some virXMLProp*()
+                                          functions. */
 } virXMLPropFlags;