static Bool
VMCIUtilCheckHostCapabilities(void)
{
int result;
VMCIResourcesQueryMsg *msg;
uint32 msgSize = sizeof(VMCIResourcesQueryHdr) +
VMCI_UTIL_NUM_RESOURCES * sizeof(VMCI_Resource);
VMCIDatagram *checkMsg = VMCI_AllocKernelMem(msgSize, VMCI_MEMORY_NONPAGED);
if (checkMsg == NULL) {
VMCI_WARNING((LGPFX"Check host: Insufficient memory.\n"));
return FALSE;
}
checkMsg->dst = VMCI_MAKE_HANDLE(VMCI_HYPERVISOR_CONTEXT_ID,
VMCI_RESOURCES_QUERY);
checkMsg->src = VMCI_ANON_SRC_HANDLE;
checkMsg->payloadSize = msgSize - VMCI_DG_HEADERSIZE;
msg = (VMCIResourcesQueryMsg *)VMCI_DG_PAYLOAD(checkMsg);
msg->numResources = VMCI_UTIL_NUM_RESOURCES;
msg->resources[0] = VMCI_GET_CONTEXT_ID;
result = VMCI_SendDatagram(checkMsg);
VMCI_FreeKernelMem(checkMsg, msgSize);
/* We need the vector. There are no fallbacks. */
return (result == 0x1);
}
static int
VMCIDatagramDispatchAsGuest(VMCIDatagram *dg)
{
#if defined(VMKERNEL)
VMCI_WARNING((LGPFX"Cannot send down to host from VMKERNEL.\n"));
return VMCI_ERROR_DST_UNREACHABLE;
#else // VMKERNEL
int retval;
VMCIResource *resource;
resource = VMCIResource_Get(dg->src, VMCI_RESOURCE_TYPE_DATAGRAM);
if (NULL == resource) {
return VMCI_ERROR_NO_HANDLE;
}
retval = VMCI_SendDatagram(dg);
VMCIResource_Release(resource);
return retval;
#endif // VMKERNEL
}
VMCIId
VMCI_GetContextID(void)
{
if (VMCI_GuestPersonalityActive()) {
if (Atomic_Read(&vmContextID) == VMCI_INVALID_ID) {
uint32 result;
VMCIDatagram getCidMsg;
getCidMsg.dst = VMCI_MAKE_HANDLE(VMCI_HYPERVISOR_CONTEXT_ID,
VMCI_GET_CONTEXT_ID);
getCidMsg.src = VMCI_ANON_SRC_HANDLE;
getCidMsg.payloadSize = 0;
result = VMCI_SendDatagram(&getCidMsg);
Atomic_Write(&vmContextID, result);
}
return Atomic_Read(&vmContextID);
} else if (VMCI_HostPersonalityActive()) {
return VMCI_HOST_CONTEXT_ID;
}
return VMCI_INVALID_ID;
}
