[libvirt] [PATCH 29/34] conf: Parse <backingStore> in virDomainStorageSourceParseFull
Peter Krempa
pkrempa at redhat.com
Mon Mar 18 15:55:18 UTC 2019
Move parsing of <backingStore> into virDomainStorageSourceParseFull so
that it can be reused easily.
Signed-off-by: Peter Krempa <pkrempa at redhat.com>
---
src/conf/domain_conf.c | 100 +++++++++++++++++++++------------------
src/conf/domain_conf.h | 3 +-
src/conf/snapshot_conf.c | 2 +-
src/qemu/qemu_domain.c | 2 +-
tests/qemublocktest.c | 2 +-
5 files changed, 59 insertions(+), 50 deletions(-)
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 5790b19315..5b13402154 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -9111,6 +9111,43 @@ virDomainStorageSourceParse(xmlNodePtr node,
}
+static int
+virDomainDiskBackingStoreParse(xmlXPathContextPtr ctxt,
+ virStorageSourcePtr src,
+ unsigned int flags,
+ virDomainXMLOptionPtr xmlopt)
+{
+ VIR_XPATH_NODE_AUTORESTORE(ctxt);
+ VIR_AUTOUNREF(virStorageSourcePtr) backingStore = NULL;
+ VIR_AUTOFREE(char *) type = NULL;
+
+ if (!(ctxt->node = virXPathNode("./backingStore", ctxt)))
+ return 0;
+
+ /* terminator does not have a type */
+ if (!(type = virXMLPropString(ctxt->node, "type"))) {
+ if (!(src->backingStore = virStorageSourceNew()))
+ return -1;
+
+ return 0;
+ }
+
+ if (!(backingStore = virDomainStorageSourceParseFull("string(@type)",
+ "string(./format/@type)",
+ "./source",
+ "string(@index)",
+ false, true, ctxt, flags, xmlopt)))
+ return -1;
+
+ /* backing store is always read-only */
+ backingStore->readonly = true;
+
+ VIR_STEAL_PTR(src->backingStore, backingStore);
+
+ return 0;
+}
+
+
/**
* virDomainStorageSourceParseFull
* @typeXPath: XPath query string for the 'type' of virStorageSource
@@ -9118,6 +9155,7 @@ virDomainStorageSourceParse(xmlNodePtr node,
* @sourceXPath: XPath query for the <source> subelement
* @indexXPath: XPath query for 'id' in virStorageSource (may be NULL if skipped)
* @allowMissing: if true no errors are reported if the above fields are missing
+ * @backingStore: Full backing chain is parsed if true
* @ctxt: XPath context
* @flags: XML parser flags
* @xmlopt: XML parser callbacks
@@ -9128,6 +9166,10 @@ virDomainStorageSourceParse(xmlNodePtr node,
* are missing. @formatXPath and @indexXpath may be NULL if they should be omitted
* or if the caller parses the value separately.
*
+ * @backingStore controls whether the full backing chain should be parsed.
+ * Backing chain is parsed from elements named <backingStore> relative to
+ * the node of @ctxt when called.
+ *
* Returns the parsed source or NULL on error.
*/
virStorageSourcePtr
@@ -9136,6 +9178,7 @@ virDomainStorageSourceParseFull(const char *typeXPath,
const char *sourceXPath,
const char *indexXPath,
bool allowMissing,
+ bool backingStore,
xmlXPathContextPtr ctxt,
unsigned int flags,
virDomainXMLOptionPtr xmlopt)
@@ -9200,50 +9243,15 @@ virDomainStorageSourceParseFull(const char *typeXPath,
virDomainStorageSourceParse(sourceNode, ctxt, src, flags, xmlopt) < 0)
return NULL;
+ if (backingStore &&
+ virDomainDiskBackingStoreParse(ctxt, src, flags, xmlopt) < 0)
+ return NULL;
+
VIR_STEAL_PTR(ret, src);
return ret;
}
-static int
-virDomainDiskBackingStoreParse(xmlXPathContextPtr ctxt,
- virStorageSourcePtr src,
- unsigned int flags,
- virDomainXMLOptionPtr xmlopt)
-{
- VIR_XPATH_NODE_AUTORESTORE(ctxt);
- VIR_AUTOUNREF(virStorageSourcePtr) backingStore = NULL;
- VIR_AUTOFREE(char *) type = NULL;
-
- if (!(ctxt->node = virXPathNode("./backingStore", ctxt)))
- return 0;
-
- /* terminator does not have a type */
- if (!(type = virXMLPropString(ctxt->node, "type"))) {
- if (!(src->backingStore = virStorageSourceNew()))
- return -1;
-
- return 0;
- }
-
- if (!(backingStore = virDomainStorageSourceParseFull("string(@type)",
- "string(./format/@type)",
- "./source",
- "string(@index)",
- false, ctxt, flags, xmlopt)))
- return -1;
-
- /* backing store is always read-only */
- backingStore->readonly = true;
-
- if (virDomainDiskBackingStoreParse(ctxt, backingStore, flags, xmlopt) < 0)
- return -1;
-
- VIR_STEAL_PTR(src->backingStore, backingStore);
-
- return 0;
-}
-
#define PARSE_IOTUNE(val) \
if (virXPathULongLong("string(./iotune/" #val ")", \
ctxt, &def->blkdeviotune.val) == -2) { \
@@ -9354,7 +9362,7 @@ virDomainDiskDefMirrorParse(virDomainDiskDefPtr def,
NULL,
"./mirror/source",
NULL,
- false, ctxt, flags, xmlopt)))
+ false, false, ctxt, flags, xmlopt)))
return -1;
mirrorFormat = virXPathString("string(./mirror/format/@type)", ctxt);
@@ -9765,6 +9773,7 @@ virDomainDiskDefParseXML(virDomainXMLOptionPtr xmlopt,
VIR_AUTOFREE(char *) vendor = NULL;
VIR_AUTOFREE(char *) product = NULL;
VIR_AUTOFREE(char *) domain_name = NULL;
+ bool backingStore = true;
if (!(def = virDomainDiskDefNew(xmlopt)))
return NULL;
@@ -9774,6 +9783,9 @@ virDomainDiskDefParseXML(virDomainXMLOptionPtr xmlopt,
/* defaults */
def->device = VIR_DOMAIN_DISK_DEVICE_DISK;
+ if ((flags & VIR_DOMAIN_DEF_PARSE_DISK_SOURCE))
+ backingStore = false;
+
if ((tmp = virXMLPropString(node, "device")) &&
(def->device = virDomainDiskDeviceTypeFromString(tmp)) < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
@@ -9799,7 +9811,8 @@ virDomainDiskDefParseXML(virDomainXMLOptionPtr xmlopt,
if (!(def->src = virDomainStorageSourceParseFull("string(@type)", NULL,
"./source",
"string(./source/@index)",
- true, ctxt, flags, xmlopt)))
+ true, backingStore,
+ ctxt, flags, xmlopt)))
goto error;
for (cur = node->children; cur != NULL; cur = cur->next) {
@@ -10134,11 +10147,6 @@ virDomainDiskDefParseXML(virDomainXMLOptionPtr xmlopt,
VIR_STEAL_PTR(def->vendor, vendor);
VIR_STEAL_PTR(def->product, product);
- if (!(flags & VIR_DOMAIN_DEF_PARSE_DISK_SOURCE)) {
- if (virDomainDiskBackingStoreParse(ctxt, def->src, flags, xmlopt) < 0)
- goto error;
- }
-
if (flags & VIR_DOMAIN_DEF_PARSE_STATUS &&
virDomainDiskDefParsePrivateData(ctxt, def, xmlopt) < 0)
goto error;
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 72272965ae..7ab7b28e4f 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -3470,11 +3470,12 @@ virDomainStorageSourceParseFull(const char *typeXPath,
const char *sourceXPath,
const char *indexXPath,
bool allowMissing,
+ bool backingStore,
xmlXPathContextPtr ctxt,
unsigned int flags,
virDomainXMLOptionPtr xmlopt)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(3)
- ATTRIBUTE_NONNULL(6);
+ ATTRIBUTE_NONNULL(7);
int virDomainDefGetVcpuPinInfoHelper(virDomainDefPtr def,
int maplen,
diff --git a/src/conf/snapshot_conf.c b/src/conf/snapshot_conf.c
index 5dad2c3c51..4cc4795cf4 100644
--- a/src/conf/snapshot_conf.c
+++ b/src/conf/snapshot_conf.c
@@ -133,7 +133,7 @@ virDomainSnapshotDiskDefParseXML(xmlNodePtr node,
if (!(def->src = virDomainStorageSourceParseFull("string(@type)",
"string(./driver/@type)",
"./source",
- NULL, true,
+ NULL, true, false,
ctxt, flags, xmlopt)))
goto cleanup;
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index e406647d8f..3ae9bdad1a 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -2696,7 +2696,7 @@ qemuDomainObjPrivateXMLParseJobNBDSource(xmlNodePtr node,
if (!(diskPriv->migrSource = virDomainStorageSourceParseFull("string(@type)",
"string(@format)",
".", NULL,
- false, ctxt,
+ false, false, ctxt,
VIR_DOMAIN_DEF_PARSE_STATUS,
priv->driver->xmlopt)))
return -1;
diff --git a/tests/qemublocktest.c b/tests/qemublocktest.c
index 48cec2869b..09eaf155e9 100644
--- a/tests/qemublocktest.c
+++ b/tests/qemublocktest.c
@@ -57,7 +57,7 @@ testBackingXMLjsonXML(const void *args)
if (!(xmlsrc = virDomainStorageSourceParseFull("string(./@type)",
"string(./@format)",
- ".", NULL, false,
+ ".", NULL, false, false,
ctxt, 0, NULL))) {
fprintf(stderr, "failed to parse disk source xml\n");
return -1;
--
2.20.1
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