[PATCH 1/3] storage_source: Add flag storing whether threshold event was registered with index

[Peter Krempa <pkrempa@xxxxxxxxxx>]

When users register the threshold event for the top level image with an
explicit index (e.g. vda[3]) they are clearly expecting the index in the
event.

This flag will help avoiding emission of the second event without the
index when the client clearly requested one with the index.

Signed-off-by: Peter Krempa <pkrempa@xxxxxxxxxx>
---
 src/conf/storage_source_conf.h            | 5 +++++
 src/qemu/qemu_domain.c                    | 8 ++++++++
 tests/qemustatusxml2xmldata/modern-in.xml | 1 +
 3 files changed, 14 insertions(+)

diff --git a/src/conf/storage_source_conf.h b/src/conf/storage_source_conf.h
index 389c7b56d1..40db29c418 100644
--- a/src/conf/storage_source_conf.h
+++ b/src/conf/storage_source_conf.h
@@ -387,6 +387,11 @@ struct _virStorageSource {
     char *nfs_group;
     uid_t nfs_uid;
     gid_t nfs_gid;
+
+    /* We need a flag to remember that the threshold event for this source was
+     * registered with a full index (vda[3]) so that we can properly report just
+     * one event for it */
+    bool thresholdEventWithIndex;
 };

 G_DEFINE_AUTOPTR_CLEANUP_FUNC(virStorageSource, virObjectUnref);
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index fc60e15eea..efff6eff86 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -1951,6 +1951,7 @@ qemuStorageSourcePrivateDataParse(xmlXPathContextPtr ctxt,
     g_autofree char *encalias = NULL;
     g_autofree char *httpcookiealias = NULL;
     g_autofree char *tlskeyalias = NULL;
+    g_autofree char *thresholdEventWithIndex = NULL;

     src->nodestorage = virXPathString("string(./nodenames/nodename[@type='storage']/@name)", ctxt);
     src->nodeformat = virXPathString("string(./nodenames/nodename[@type='format']/@name)", ctxt);
@@ -1990,6 +1991,10 @@ qemuStorageSourcePrivateDataParse(xmlXPathContextPtr ctxt,
     if (virStorageSourcePrivateDataParseRelPath(ctxt, src) < 0)
         return -1;

+    if ((thresholdEventWithIndex = virXPathString("string(./thresholdEvent/@indexUsed)", ctxt)) &&
+        virTristateBoolTypeFromString(thresholdEventWithIndex) == VIR_TRISTATE_BOOL_YES)
+        src->thresholdEventWithIndex = true;
+
     return 0;
 }

@@ -2044,6 +2049,9 @@ qemuStorageSourcePrivateDataFormat(virStorageSource *src,

     virXMLFormatElement(buf, "objects", NULL, &tmp);

+    if (src->thresholdEventWithIndex)
+        virBufferAddLit(buf, "<thresholdEvent indexUsed='yes'/>\n");
+
     return 0;
 }

diff --git a/tests/qemustatusxml2xmldata/modern-in.xml b/tests/qemustatusxml2xmldata/modern-in.xml
index ba0858a4ff..cc5fd1cb74 100644
--- a/tests/qemustatusxml2xmldata/modern-in.xml
+++ b/tests/qemustatusxml2xmldata/modern-in.xml
@@ -340,6 +340,7 @@
                 <secret type='tlskey' alias='tls-certificate-key-alias'/>
                 <TLSx509 alias='transport-alias'/>
               </objects>
+              <thresholdEvent indexUsed='yes'/>
             </privateData>
           </source>
           <backingStore/>
-- 
2.31.1