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conf: Rework virStorageVolDefParseXML

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Rather than having an error path, let's rework the code to allocate
and fill into an @def variable and then steal that into @ret when we
are successful leaving just a cleanup: path.

Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
John Ferlan 2019-02-07 17:43:27 -05:00
parent e687538d3a
commit d04fbe7dab
1 changed files with 56 additions and 57 deletions
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113
src/conf/storage_conf.c
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@ -1168,7 +1168,8 @@ virStorageVolDefParseXML(virStoragePoolDefPtr pool,
xmlXPathContextPtr ctxt,
unsigned int flags)
{
virStorageVolDefPtr ret;
virStorageVolDefPtr def;
virStorageVolDefPtr ret = NULL;
virStorageVolOptionsPtr options;
char *type = NULL;
char *allocation = NULL;
@ -1187,132 +1188,132 @@ virStorageVolDefParseXML(virStoragePoolDefPtr pool,
if (options == NULL)
return NULL;
if (VIR_ALLOC(ret) < 0)
if (VIR_ALLOC(def) < 0)
return NULL;
ret->target.type = VIR_STORAGE_TYPE_FILE;
def->target.type = VIR_STORAGE_TYPE_FILE;
ret->name = virXPathString("string(./name)", ctxt);
if (ret->name == NULL) {
def->name = virXPathString("string(./name)", ctxt);
if (def->name == NULL) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("missing volume name element"));
goto error;
goto cleanup;
}
/* Normally generated by pool refresh, but useful for unit tests */
ret->key = virXPathString("string(./key)", ctxt);
def->key = virXPathString("string(./key)", ctxt);
/* Technically overridden by pool refresh, but useful for unit tests */
type = virXPathString("string(./@type)", ctxt);
if (type) {
if ((ret->type = virStorageVolTypeFromString(type)) < 0) {
if ((def->type = virStorageVolTypeFromString(type)) < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unknown volume type '%s'"), type);
goto error;
goto cleanup;
}
}
if ((backingStore = virXPathString("string(./backingStore/path)", ctxt))) {
if (VIR_ALLOC(ret->target.backingStore) < 0)
goto error;
if (VIR_ALLOC(def->target.backingStore) < 0)
goto cleanup;
ret->target.backingStore->type = VIR_STORAGE_TYPE_FILE;
def->target.backingStore->type = VIR_STORAGE_TYPE_FILE;
ret->target.backingStore->path = backingStore;
def->target.backingStore->path = backingStore;
backingStore = NULL;
if (options->formatFromString) {
char *format = virXPathString("string(./backingStore/format/@type)", ctxt);
if (format == NULL)
ret->target.backingStore->format = options->defaultFormat;
def->target.backingStore->format = options->defaultFormat;
else
ret->target.backingStore->format = (options->formatFromString)(format);
def->target.backingStore->format = (options->formatFromString)(format);
if (ret->target.backingStore->format < 0) {
if (def->target.backingStore->format < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unknown volume format type %s"), format);
VIR_FREE(format);
goto error;
goto cleanup;
}
VIR_FREE(format);
}
if (VIR_ALLOC(ret->target.backingStore->perms) < 0)
goto error;
if (virStorageDefParsePerms(ctxt, ret->target.backingStore->perms,
if (VIR_ALLOC(def->target.backingStore->perms) < 0)
goto cleanup;
if (virStorageDefParsePerms(ctxt, def->target.backingStore->perms,
"./backingStore/permissions") < 0)
goto error;
goto cleanup;
}
capacity = virXPathString("string(./capacity)", ctxt);
unit = virXPathString("string(./capacity/@unit)", ctxt);
if (capacity) {
if (virStorageSize(unit, capacity, &ret->target.capacity) < 0)
goto error;
if (virStorageSize(unit, capacity, &def->target.capacity) < 0)
goto cleanup;
} else if (!(flags & VIR_VOL_XML_PARSE_NO_CAPACITY) &&
!((flags & VIR_VOL_XML_PARSE_OPT_CAPACITY) &&
virStorageSourceHasBacking(&ret->target))) {
virStorageSourceHasBacking(&def->target))) {
virReportError(VIR_ERR_XML_ERROR, "%s", _("missing capacity element"));
goto error;
goto cleanup;
}
VIR_FREE(unit);
allocation = virXPathString("string(./allocation)", ctxt);
if (allocation) {
unit = virXPathString("string(./allocation/@unit)", ctxt);
if (virStorageSize(unit, allocation, &ret->target.allocation) < 0)
goto error;
ret->target.has_allocation = true;
if (virStorageSize(unit, allocation, &def->target.allocation) < 0)
goto cleanup;
def->target.has_allocation = true;
} else {
ret->target.allocation = ret->target.capacity;
def->target.allocation = def->target.capacity;
}
ret->target.path = virXPathString("string(./target/path)", ctxt);
def->target.path = virXPathString("string(./target/path)", ctxt);
if (options->formatFromString) {
char *format = virXPathString("string(./target/format/@type)", ctxt);
if (format == NULL)
ret->target.format = options->defaultFormat;
def->target.format = options->defaultFormat;
else
ret->target.format = (options->formatFromString)(format);
def->target.format = (options->formatFromString)(format);
if (ret->target.format < 0) {
if (def->target.format < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unknown volume format type %s"), format);
VIR_FREE(format);
goto error;
goto cleanup;
}
VIR_FREE(format);
}
if (VIR_ALLOC(ret->target.perms) < 0)
goto error;
if (virStorageDefParsePerms(ctxt, ret->target.perms,
if (VIR_ALLOC(def->target.perms) < 0)
goto cleanup;
if (virStorageDefParsePerms(ctxt, def->target.perms,
"./target/permissions") < 0)
goto error;
goto cleanup;
node = virXPathNode("./target/encryption", ctxt);
if (node != NULL) {
ret->target.encryption = virStorageEncryptionParseNode(node, ctxt);
if (ret->target.encryption == NULL)
goto error;
def->target.encryption = virStorageEncryptionParseNode(node, ctxt);
if (def->target.encryption == NULL)
goto cleanup;
}
ret->target.compat = virXPathString("string(./target/compat)", ctxt);
if (virStorageFileCheckCompat(ret->target.compat) < 0)
goto error;
def->target.compat = virXPathString("string(./target/compat)", ctxt);
if (virStorageFileCheckCompat(def->target.compat) < 0)
goto cleanup;
if (virXPathNode("./target/nocow", ctxt))
ret->target.nocow = true;
def->target.nocow = true;
if (virXPathNode("./target/features", ctxt)) {
if ((n = virXPathNodeSet("./target/features/*", ctxt, &nodes)) < 0)
goto error;
goto cleanup;
if (!ret->target.compat && VIR_STRDUP(ret->target.compat, "1.1") < 0)
goto error;
if (!def->target.compat && VIR_STRDUP(def->target.compat, "1.1") < 0)
goto cleanup;
if (!(ret->target.features = virBitmapNew(VIR_STORAGE_FILE_FEATURE_LAST)))
goto error;
if (!(def->target.features = virBitmapNew(VIR_STORAGE_FILE_FEATURE_LAST)))
goto cleanup;
for (i = 0; i < n; i++) {
int f = virStorageFileFeatureTypeFromString((const char*)nodes[i]->name);
@ -1320,14 +1321,17 @@ virStorageVolDefParseXML(virStoragePoolDefPtr pool,
if (f < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("unsupported feature %s"),
(const char*)nodes[i]->name);
goto error;
goto cleanup;
}
ignore_value(virBitmapSetBit(ret->target.features, f));
ignore_value(virBitmapSetBit(def->target.features, f));
}
VIR_FREE(nodes);
}
VIR_STEAL_PTR(ret, def);
cleanup:
virStorageVolDefFree(def);
VIR_FREE(nodes);
VIR_FREE(allocation);
VIR_FREE(capacity);
@ -1335,11 +1339,6 @@ virStorageVolDefParseXML(virStoragePoolDefPtr pool,
VIR_FREE(type);
VIR_FREE(backingStore);
return ret;
error:
virStorageVolDefFree(ret);
ret = NULL;
goto cleanup;
}