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node_device_conf: Bring variables into loops

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I've noticed three functions inside node_device_conf.c, namely:
 - virNodeDeviceCapVPDParseCustomFields()
 - virNodeDeviceCapVPDParseReadOnlyFields()
 - virNodeDeviceCapVPDParseXML()

that have strange attitude towards g_auto* variables. The first
problem is that variables are declared at the top level despite
being used inside a loop. The second problem is use of g_free()
in combination with g_steal_pointer() even though we have
VIR_FREE() which does exactly that.

Bringing variable declarations into their respective loops allows
us to make the code nicer.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Tim Wiederhake <twiederh@redhat.com>
This commit is contained in:
Michal Privoznik 2021-11-02 17:16:16 +01:00
parent 958f8fe8c4
commit bed0329b1c
1 changed files with 17 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
src/conf/node_device_conf.c
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@ -940,19 +940,20 @@ static int
virNodeDeviceCapVPDParseCustomFields(xmlXPathContextPtr ctxt, virPCIVPDResource *res, bool readOnly)
{
int nfields = -1;
g_autofree char *index = NULL, *value = NULL, *keyword = NULL;
g_autofree xmlNodePtr *nodes = NULL;
xmlNodePtr orignode = NULL;
size_t i = 0;
orignode = ctxt->node;
if ((nfields = virXPathNodeSet("./vendor_field[@index]", ctxt, &nodes)) < 0) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("failed to evaluate <vendor_field> elements"));
ctxt->node = orignode;
return -1;
}
for (i = 0; i < nfields; i++) {
g_autofree char *value = NULL;
g_autofree char *index = NULL;
VIR_XPATH_NODE_AUTORESTORE(ctxt)
g_autofree char *keyword = NULL;
ctxt->node = nodes[i];
if (!(index = virXPathStringLimit("string(./@index[1])", 2, ctxt))) {
virReportError(VIR_ERR_XML_ERROR, "%s",
@ -966,21 +967,21 @@ virNodeDeviceCapVPDParseCustomFields(xmlXPathContextPtr ctxt, virPCIVPDResource
}
keyword = g_strdup_printf("V%c", index[0]);
virPCIVPDResourceUpdateKeyword(res, readOnly, keyword, value);
g_free(g_steal_pointer(&index));
g_free(g_steal_pointer(&keyword));
g_free(g_steal_pointer(&value));
}
g_free(g_steal_pointer(&nodes));
ctxt->node = orignode;
VIR_FREE(nodes);
if (!readOnly) {
if ((nfields = virXPathNodeSet("./system_field[@index]", ctxt, &nodes)) < 0) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("failed to evaluate <system_field> elements"));
ctxt->node = orignode;
return -1;
}
for (i = 0; i < nfields; i++) {
g_autofree char *value = NULL;
g_autofree char *index = NULL;
g_autofree char *keyword = NULL;
VIR_XPATH_NODE_AUTORESTORE(ctxt);
ctxt->node = nodes[i];
if (!(index = virXPathStringLimit("string(./@index[1])", 2, ctxt))) {
virReportError(VIR_ERR_XML_ERROR, "%s",
@ -994,11 +995,7 @@ virNodeDeviceCapVPDParseCustomFields(xmlXPathContextPtr ctxt, virPCIVPDResource
}
keyword = g_strdup_printf("Y%c", index[0]);
virPCIVPDResourceUpdateKeyword(res, readOnly, keyword, value);
g_free(g_steal_pointer(&index));
g_free(g_steal_pointer(&keyword));
g_free(g_steal_pointer(&value));
}
ctxt->node = orignode;
}
return 0;
@ -1009,8 +1006,6 @@ virNodeDeviceCapVPDParseReadOnlyFields(xmlXPathContextPtr ctxt, virPCIVPDResourc
{
const char *keywords[] = {"change_level", "manufacture_id",
"serial_number", "part_number", NULL};
g_autofree char *expression = NULL;
g_autofree char *result = NULL;
size_t i = 0;
if (res == NULL)
@ -1019,11 +1014,10 @@ virNodeDeviceCapVPDParseReadOnlyFields(xmlXPathContextPtr ctxt, virPCIVPDResourc
res->ro = virPCIVPDResourceRONew();
while (keywords[i]) {
expression = g_strdup_printf("string(./%s)", keywords[i]);
result = virXPathString(expression, ctxt);
g_autofree char *expression = g_strdup_printf("string(./%s)", keywords[i]);
g_autofree char *result = virXPathString(expression, ctxt);
virPCIVPDResourceUpdateKeyword(res, true, keywords[i], result);
g_free(g_steal_pointer(&expression));
g_free(g_steal_pointer(&result));
++i;
}
if (virNodeDeviceCapVPDParseCustomFields(ctxt, res, true) < 0)
@ -1047,38 +1041,34 @@ virNodeDeviceCapVPDParseReadWriteFields(xmlXPathContextPtr ctxt, virPCIVPDResour
static int
virNodeDeviceCapVPDParseXML(xmlXPathContextPtr ctxt, virPCIVPDResource **res)
{
xmlNodePtr orignode = NULL;
g_autofree xmlNodePtr *nodes = NULL;
int nfields = -1;
g_autofree char *access = NULL;
size_t i = 0;
g_autoptr(virPCIVPDResource) newres = g_new0(virPCIVPDResource, 1);
if (res == NULL)
return -1;
orignode = ctxt->node;
if (!(newres->name = virXPathString("string(./name)", ctxt))) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("Could not read a device name from the <name> element"));
ctxt->node = orignode;
return -1;
}
if ((nfields = virXPathNodeSet("./fields[@access]", ctxt, &nodes)) < 0) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("no VPD <fields> elements with an access type attribute found"));
ctxt->node = orignode;
return -1;
}
for (i = 0; i < nfields; i++) {
g_autofree char *access = NULL;
VIR_XPATH_NODE_AUTORESTORE(ctxt);
ctxt->node = nodes[i];
if (!(access = virXPathString("string(./@access[1])", ctxt))) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("VPD fields access type parsing has failed"));
ctxt->node = orignode;
return -1;
}
@ -1099,9 +1089,7 @@ virNodeDeviceCapVPDParseXML(xmlXPathContextPtr ctxt, virPCIVPDResource **res)
access);
return -1;
}
g_free(g_steal_pointer(&access));
}
ctxt->node = orignode;
/* Replace the existing VPD representation if there is one already. */
if (*res != NULL)