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conf: new functions to check if PCI address is wanted/present

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In order to allow <address type='pci'/> with no other attributes to
mean "I want a PCI address, but any PCI address will do" (just as
having no <address> at all usually indicates), we will need to change
several places in the code from a simple "info->type == (or !=)
VIR_DOMAIN_DEVICE_ADDRESS_TYPE_(PCI|NONE)" into something slightly
more complex, this patch adds to new functions that take a
virDomainDeviceInfoPtr and return true/false depending on 1) whether
the current state of the info indicates that we "want" a PCI address
for this device (virDeviceInfoPCIAddressWanted()) and 2) whether this
device already has a valid PCI address
(virDeviceInfoPCIAddressPresent()).

Both of these functions required the simpler check for whether a pci
address is "empty" (i.e. all of its attributes are 0, which can never
happen in a real PCI address, since slot 0 of bus 0 of domain 0 is
always reserved), so that function is also added.
This commit is contained in:
Laine Stump 2016-05-18 12:04:42 -04:00
parent ff89e9b932
commit 9a81a36353
1 changed files with 21 additions and 0 deletions
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21
src/conf/device_conf.h
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@ -184,6 +184,27 @@ typedef struct _virDomainDeviceInfo {
int virPCIDeviceAddressIsValid(virPCIDeviceAddressPtr addr,
bool report);
static inline bool
virPCIDeviceAddressIsEmpty(const virPCIDeviceAddress *addr)
{
return !(addr->domain || addr->bus || addr->slot);
}
static inline bool
virDeviceInfoPCIAddressWanted(const virDomainDeviceInfo *info)
{
return info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE ||
(info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI &&
virPCIDeviceAddressIsEmpty(&info->addr.pci));
}
static inline bool
virDeviceInfoPCIAddressPresent(const virDomainDeviceInfo *info)
{
return info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI &&
!virPCIDeviceAddressIsEmpty(&info->addr.pci);
}
int virPCIDeviceAddressParseXML(xmlNodePtr node,
virPCIDeviceAddressPtr addr);