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domain_conf: Refactor virDomainDeviceInfoParseXML to use XPath

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Currently, virDomainDeviceInfoParseXML() uses node->children
evaluation which is too verbose. Use XPath evaluation which is
nicer.

Signed-off-by: Kristina Hanicova <khanicov@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Kristina Hanicova 2021-03-12 13:44:49 +01:00 committed by Michal Privoznik
parent df3359fb18
commit e6c6efc208
1 changed files with 12 additions and 38 deletions
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50
src/conf/domain_conf.c
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@ -6637,77 +6637,51 @@ virDomainDeviceAliasIsUserAlias(const char *aliasStr)
static int
virDomainDeviceInfoParseXML(virDomainXMLOptionPtr xmlopt,
xmlNodePtr node,
xmlXPathContextPtr ctxt G_GNUC_UNUSED,
xmlXPathContextPtr ctxt,
virDomainDeviceInfoPtr info,
unsigned int flags)
{
xmlNodePtr cur;
xmlNodePtr address = NULL;
xmlNodePtr master = NULL;
xmlNodePtr alias = NULL;
xmlNodePtr boot = NULL;
xmlNodePtr rom = NULL;
int ret = -1;
g_autofree char *romenabled = NULL;
g_autofree char *rombar = NULL;
g_autofree char *aliasStr = NULL;
VIR_XPATH_NODE_AUTORESTORE(ctxt)
virDomainDeviceInfoClear(info);
ctxt->node = node;
cur = node->children;
while (cur != NULL) {
if (cur->type == XML_ELEMENT_NODE) {
if (alias == NULL &&
virXMLNodeNameEqual(cur, "alias")) {
alias = cur;
} else if (address == NULL &&
virXMLNodeNameEqual(cur, "address")) {
address = cur;
} else if (master == NULL &&
virXMLNodeNameEqual(cur, "master")) {
master = cur;
} else if (boot == NULL &&
(flags & VIR_DOMAIN_DEF_PARSE_ALLOW_BOOT) &&
virXMLNodeNameEqual(cur, "boot")) {
boot = cur;
} else if (rom == NULL &&
(flags & VIR_DOMAIN_DEF_PARSE_ALLOW_ROM) &&
virXMLNodeNameEqual(cur, "rom")) {
rom = cur;
}
}
cur = cur->next;
}
if (alias) {
aliasStr = virXMLPropString(alias, "name");
if ((aliasStr = virXPathString("string(./alias/@name)", ctxt)))
if (!(flags & VIR_DOMAIN_DEF_PARSE_INACTIVE) ||
(xmlopt->config.features & VIR_DOMAIN_DEF_FEATURE_USER_ALIAS &&
virDomainDeviceAliasIsUserAlias(aliasStr) &&
strspn(aliasStr, USER_ALIAS_CHARS) == strlen(aliasStr)))
info->alias = g_steal_pointer(&aliasStr);
}
if (master) {
if ((master = virXPathNode("./master", ctxt))) {
info->mastertype = VIR_DOMAIN_CONTROLLER_MASTER_USB;
if (virDomainDeviceUSBMasterParseXML(master, &info->master.usb) < 0)
goto cleanup;
}
if (boot) {
if (flags & VIR_DOMAIN_DEF_PARSE_ALLOW_BOOT &&
(boot = virXPathNode("./boot", ctxt))) {
if (virDomainDeviceBootParseXML(boot, info))
goto cleanup;
}
if (rom) {
if ((romenabled = virXMLPropString(rom, "enabled")) &&
if ((flags & VIR_DOMAIN_DEF_PARSE_ALLOW_ROM) &&
(rom = virXPathNode("./rom", ctxt))) {
if ((romenabled = virXPathString("string(./rom/@enabled)", ctxt)) &&
((info->romenabled = virTristateBoolTypeFromString(romenabled)) <= 0)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unknown rom enabled value '%s'"), romenabled);
goto cleanup;
}
if ((rombar = virXMLPropString(rom, "bar")) &&
if ((rombar = virXPathString("string(./rom/@bar)", ctxt)) &&
((info->rombar = virTristateSwitchTypeFromString(rombar)) <= 0)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unknown rom bar value '%s'"), rombar);
@ -6723,7 +6697,7 @@ virDomainDeviceInfoParseXML(virDomainXMLOptionPtr xmlopt,
}
}
if (address &&
if ((address = virXPathNode("./address", ctxt)) &&
virDomainDeviceAddressParseXML(address, info) < 0)
goto cleanup;