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virsh: cmdDomIfSetLink: Use virXPathNodeSet instead of xmlXpathEval

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Refactor the XPath lookup to use the internal helper.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2022-10-19 10:39:33 +02:00
parent 0974c3ab6e
commit e575bf082e
1 changed files with 44 additions and 61 deletions
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105
tools/virsh-domain.c
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@ -3133,18 +3133,17 @@ cmdDomIfSetLink(vshControl *ctl, const vshCmd *cmd)
g_autoptr(virshDomain) dom = NULL;
const char *iface;
const char *state;
virMacAddr macaddr;
const char *element;
const char *attr;
bool config;
unsigned int flags = 0;
unsigned int xmlflags = 0;
size_t i;
g_autoptr(xmlDoc) xml = NULL;
g_autoptr(xmlXPathContext) ctxt = NULL;
g_autoptr(xmlXPathObject) obj = NULL;
xmlNodePtr cur = NULL;
g_autofree char *xml_buf = NULL;
g_autofree xmlNodePtr *nodes = NULL;
ssize_t nnodes;
xmlNodePtr ifaceNode = NULL;
xmlNodePtr linkNode = NULL;
xmlAttrPtr stateAttr;
if (!(dom = virshCommandOptDomain(ctl, cmd, NULL)))
return false;
@ -3153,14 +3152,12 @@ cmdDomIfSetLink(vshControl *ctl, const vshCmd *cmd)
vshCommandOptStringReq(ctl, cmd, "state", &state) < 0)
return false;
config = vshCommandOptBool(cmd, "config");
if (STRNEQ(state, "up") && STRNEQ(state, "down")) {
vshError(ctl, _("invalid link state '%s'"), state);
return false;
}
if (config) {
if (vshCommandOptBool(cmd, "config")) {
flags = VIR_DOMAIN_AFFECT_CONFIG;
xmlflags |= VIR_DOMAIN_XML_INACTIVE;
} else {
@ -3173,70 +3170,56 @@ cmdDomIfSetLink(vshControl *ctl, const vshCmd *cmd)
if (virshDomainGetXMLFromDom(ctl, dom, xmlflags, &xml, &ctxt) < 0)
return false;
obj = xmlXPathEval(BAD_CAST "/domain/devices/interface", ctxt);
if (obj == NULL || obj->type != XPATH_NODESET ||
obj->nodesetval == NULL || obj->nodesetval->nodeNr == 0) {
if ((nnodes = virXPathNodeSet("/domain/devices/interface", ctxt, &nodes)) <= 0) {
vshError(ctl, _("Failed to extract interface information or no interfaces found"));
return false;
}
if (virMacAddrParse(iface, &macaddr) == 0) {
element = "mac";
attr = "address";
} else {
element = "target";
attr = "dev";
}
for (i = 0; i < nnodes; i++) {
g_autofree char *macaddr = NULL;
g_autofree char *target = NULL;
/* find interface with matching mac addr */
for (i = 0; i < obj->nodesetval->nodeNr; i++) {
cur = obj->nodesetval->nodeTab[i]->children;
while (cur) {
if (cur->type == XML_ELEMENT_NODE &&
virXMLNodeNameEqual(cur, element)) {
g_autofree char *value = virXMLPropString(cur, attr);
if (STRCASEEQ(value, iface))
goto hit;
}
cur = cur->next;
}
}
vshError(ctl, _("interface (%s: %s) not found"), element, iface);
return false;
hit:
/* find and modify/add link state node */
/* try to find <link> element */
cur = obj->nodesetval->nodeTab[i]->children;
while (cur) {
if (cur->type == XML_ELEMENT_NODE &&
virXMLNodeNameEqual(cur, "link")) {
/* found, just modify the property */
xmlSetProp(cur, BAD_CAST "state", BAD_CAST state);
ctxt->node = nodes[i];
if ((macaddr = virXPathString("string(./mac/@address)", ctxt)) &&
STRCASEEQ(macaddr, iface)) {
ifaceNode = nodes[i];
break;
}
if ((target = virXPathString("string(./target/@dev)", ctxt)) &&
STRCASEEQ(target, iface)) {
ifaceNode = nodes[i];
break;
}
cur = cur->next;
}
if (!cur) {
/* element <link> not found, add one */
cur = xmlNewChild(obj->nodesetval->nodeTab[i],
NULL,
BAD_CAST "link",
NULL);
if (!cur)
return false;
if (xmlNewProp(cur, BAD_CAST "state", BAD_CAST state) == NULL)
return false;
if (!ifaceNode) {
vshError(ctl, _("interface '%s' not found"), iface);
return false;
}
if (!(xml_buf = virXMLNodeToString(xml, obj->nodesetval->nodeTab[i]))) {
ctxt->node = ifaceNode;
/* try to find <link> element or create new one */
if (!(linkNode = virXPathNode("./link", ctxt))) {
if (!(linkNode = xmlNewChild(ifaceNode, NULL, BAD_CAST "link", NULL))) {
vshError(ctl, _("failed to create XML node"));
return false;
}
}
if (xmlHasProp(linkNode, BAD_CAST "link"))
stateAttr = xmlSetProp(linkNode, BAD_CAST "state", BAD_CAST state);
else
stateAttr = xmlNewProp(linkNode, BAD_CAST "state", BAD_CAST state);
if (!stateAttr) {
vshError(ctl, _("Failed to create or modify the state XML attribute"));
return false;
}
if (!(xml_buf = virXMLNodeToString(xml, ifaceNode))) {
vshSaveLibvirtError();
vshError(ctl, _("Failed to create XML"));
return false;