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Re: [PATCH net-next 1/3] VMCI: only load on VMware hypervisor

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> On Aug 16, 2017, at 12:13 AM, Dexuan Cui <decui@microsoft.com> wrote:
> 
> 
> Without the patch, vmw_vsock_vmci_transport.ko and vmw_vmci.ko can
> automatically load when an application creates an AF_VSOCK socket.
> 
> This is the expected good behavior on VMware hypervisor, but as we
> are going to add hv_sock.ko (i.e. Hyper-V transport for AF_VSOCK), we
> should make sure vmw_vsock_vmci_transport.ko doesn't load on Hyper-V,
> otherwise there is a -EBUSY conflict when both vmw_vsock_vmci_transport.ko
> and hv_sock.ko try to call vsock_core_init() on Hyper-V.

The VMCI driver (vmw_vmci.ko) is used both by the VMware guest support (VMware Tools primarily) and by our Workstation product. Always disabling the VMCI driver on Hyper-V means that user won’t be able to run Workstation nested in Linux VMs on Hyper-V. Since the VMCI driver itself isn’t the problem here, maybe we could move the check to vmw_vsock_vmci_transport.ko? Ideally, there should be some way for a user to have access to both protocols, but for now disabling the VMCI socket transport for Hyper-V (possibly with a module option to skip that check and always load it) but leaving the VMCI driver functional would be better,

Thanks,
Jorgen

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[PATCH net-next 1/3] VMCI: only load on VMware hypervisor Dexuan Cui <decui@microsoft.com> - 2017-08-16 00:20 +0200
  Re: [PATCH net-next 1/3] VMCI: only load on VMware hypervisor David Miller <davem@davemloft.net> - 2017-08-16 20:10 +0200
    Re: [PATCH net-next 1/3] VMCI: only load on VMware hypervisor David Miller <davem@davemloft.net> - 2017-08-16 21:00 +0200
  Re: [PATCH net-next 1/3] VMCI: only load on VMware hypervisor "Jorgen S. Hansen" <jhansen@vmware.com> - 2017-08-16 21:50 +0200

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