Re: [libvirt] [PATCHv3 19/27] conf: Add separate defaults addition and validation for XML parsing

This patch adds instrumentation that will ultimately allow to split out filling of defaults and input validation from the XML parser to separate functions. With this patch, after the XML is parsed, a callback to the driver is issued requesing to fill and validate driver specific details of the configuration. This allows to use sensible defaults and checks on a per driver basis at the time the XML is parsed. Three callback pointers are exposed in the new virDomainXMLConf object:

* virDomainDeviceDefAdjustCallback - called for a single device parsed and for every single device in a domain config. A virDomainDeviceDefPtr is passed along with the domain definition and virCaps. * virDomainDefAdjustCallback - called if a domain definition is parsed device specific callbacks were called. A virDomainDefPtr is passed along with virCaps. There are two callbacks of this kind, one called before the devices are parsed and one after.

static virClassPtr virDomainXMLConfClass; +static void virDoaminXMLConfClassDispose(void *obj)

+{ + virDomainXMLConfPtr xmlconf = obj; + + if (xmlconf->adjust.privFree) + (xmlconf->adjust.privFree)(xmlconf->adjust.priv); +} static int virDomainXMLConfOnceInit(void) { if (!(virDomainXMLConfClass = virClassNew(virClassForObject(), "virDomainXMLConf", sizeof(virDomainXMLConf), - NULL))) + virDoaminXMLConfClassDispose)))

return -1; return 0; @@ -2450,6 +2458,104 @@ int virDomainDeviceInfoIterate(virDomainDefPtr def, } +static int +virDomainDeviceDefAdjustInternal(virDomainDeviceDefPtr dev ATTRIBUTE_UNUSED, + virDomainDefPtr def ATTRIBUTE_UNUSED, + virCapsPtr caps ATTRIBUTE_UNUSED) +{ + /* not in use yet */ + return 0; +} + + +static int +virDomainDefAdjustInternal(virDomainDefPtr def ATTRIBUTE_UNUSED, + virCapsPtr caps ATTRIBUTE_UNUSED) +{ + /* not in use yet */ + return 0; +} + + +static int +virDomainDeviceDefAdjust(virDomainXMLConfPtr xmlconf, + virDomainDeviceDefPtr dev, + virDomainDefPtr def, + virCapsPtr caps) +{ + int ret; + + if ((ret = virDomainDeviceDefAdjustInternal(dev, def, caps)) < 0) + return ret; + + if (xmlconf && xmlconf->adjust.devices) { + if ((ret = xmlconf->adjust.devices(dev, def, caps, + xmlconf->adjust.priv)) < 0) + return ret; + } + + return 0; +} + + +struct virDomainDefAdjustDeviceIteratorData { + virCapsPtr caps; + virDomainDefPtr def; + virDomainXMLConfPtr xmlconf; +}; + + +static int +virDomainDefAdjustDeviceIterator(virDomainDefPtr def ATTRIBUTE_UNUSED, + virDomainDeviceDefPtr dev, + virDomainDeviceInfoPtr info ATTRIBUTE_UNUSED, + void *opaque) +{ + struct virDomainDefAdjustDeviceIteratorData *data = opaque; + return virDomainDeviceDefAdjust(data->xmlconf, dev, data->def, data->caps); +} + + +static int +virDomainDefAdjust(virDomainXMLConfPtr xmlconf, + virDomainDefPtr def, + virCapsPtr caps)