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virDomainHostdevSubsysSCSIHostDefParseXML: Switch to a more modern XML parsing approach

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Use XPath instead of iterating through the nodes.

Few error messages were modified so that the parser can be written in a
simpler way.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2020-09-09 16:17:05 +02:00
parent 00688ea47e
commit b4d2cb58b2
1 changed files with 39 additions and 67 deletions
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106
src/conf/domain_conf.c
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@ -8262,89 +8262,61 @@ virDomainStorageNetworkParseHosts(xmlNodePtr node,
static int
virDomainHostdevSubsysSCSIHostDefParseXML(xmlNodePtr sourcenode,
xmlXPathContextPtr ctxt,
virDomainHostdevSubsysSCSIPtr scsisrc)
{
bool got_address = false, got_adapter = false;
xmlNodePtr cur;
virDomainHostdevSubsysSCSIHostPtr scsihostsrc = &scsisrc->u.host;
g_autofree char *bus = NULL;
g_autofree char *target = NULL;
g_autofree char *unit = NULL;
xmlNodePtr addressnode = NULL;
VIR_XPATH_NODE_AUTORESTORE(ctxt)
cur = sourcenode->children;
while (cur != NULL) {
if (cur->type == XML_ELEMENT_NODE) {
if (virXMLNodeNameEqual(cur, "address")) {
if (got_address) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("more than one source addresses is "
"specified for scsi hostdev"));
return -1;
}
ctxt->node = sourcenode;
if (!(bus = virXMLPropString(cur, "bus")) ||
!(target = virXMLPropString(cur, "target")) ||
!(unit = virXMLPropString(cur, "unit"))) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("'bus', 'target', and 'unit' must be specified "
"for scsi hostdev source address"));
return -1;
}
if (virStrToLong_uip(bus, NULL, 0, &scsihostsrc->bus) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot parse bus '%s'"), bus);
return -1;
}
if (virStrToLong_uip(target, NULL, 0,
&scsihostsrc->target) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot parse target '%s'"), target);
return -1;
}
if (virStrToLong_ullp(unit, NULL, 0, &scsihostsrc->unit) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot parse unit '%s'"), unit);
return -1;
}
got_address = true;
} else if (virXMLNodeNameEqual(cur, "adapter")) {
if (got_adapter) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("more than one adapters is specified "
"for scsi hostdev source"));
return -1;
}
if (!(scsihostsrc->adapter = virXMLPropString(cur, "name"))) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("'adapter' must be specified for scsi hostdev source"));
return -1;
}
got_adapter = true;
} else {
virReportError(VIR_ERR_XML_ERROR,
_("unsupported element '%s' of scsi hostdev source"),
cur->name);
return -1;
}
}
cur = cur->next;
if (!(addressnode = virXPathNode("./address", ctxt))) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("'address' must be specified for scsi hostdev source"));
return -1;
}
if (!got_address || !got_adapter) {
if (!(bus = virXMLPropString(addressnode, "bus")) ||
!(target = virXMLPropString(addressnode, "target")) ||
!(unit = virXMLPropString(addressnode, "unit"))) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("'adapter' and 'address' must be specified for scsi "
"hostdev source"));
_("'bus', 'target', and 'unit' must be specified "
"for scsi hostdev source address"));
return -1;
}
if (virStrToLong_uip(bus, NULL, 0, &scsihostsrc->bus) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot parse bus '%s'"), bus);
return -1;
}
if (virStrToLong_uip(target, NULL, 0, &scsihostsrc->target) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot parse target '%s'"), target);
return -1;
}
if (virStrToLong_ullp(unit, NULL, 0, &scsihostsrc->unit) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot parse unit '%s'"), unit);
return -1;
}
if (!(scsihostsrc->adapter = virXPathString("string(./adapter/@name)", ctxt))) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("'adapter' name must be specified for scsi hostdev source"));
return -1;
}
return 0;
}
static int
virDomainHostdevSubsysSCSIiSCSIDefParseXML(xmlNodePtr sourcenode,
virDomainHostdevSubsysSCSIPtr def,
@ -8441,7 +8413,7 @@ virDomainHostdevSubsysSCSIDefParseXML(xmlNodePtr sourcenode,
switch ((virDomainHostdevSCSIProtocolType) scsisrc->protocol) {
case VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_NONE:
return virDomainHostdevSubsysSCSIHostDefParseXML(sourcenode, scsisrc);
return virDomainHostdevSubsysSCSIHostDefParseXML(sourcenode, ctxt, scsisrc);
case VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_ISCSI:
return virDomainHostdevSubsysSCSIiSCSIDefParseXML(sourcenode, scsisrc, ctxt,