Re: [PATCH 1/2] Add virHostdevFindUSBDevice to private symbols

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On 08/05/2016 01:10 AM, Cédric Bosdonnat wrote:
> Finding an USB device from the vendor/device values will be needed
> by libxl driver to convert from vendor/device to bus/dev addresses.
> ---
>  src/libvirt_private.syms | 1 +
>  src/util/virhostdev.c    | 2 +-
>  src/util/virhostdev.h    | 6 ++++++
>  3 files changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
> index 419c33d..de8b1fe 100644
> --- a/src/libvirt_private.syms
> +++ b/src/libvirt_private.syms
> @@ -1646,6 +1646,7 @@ virHookPresent;
>  
>  
>  # util/virhostdev.h
> +virHostdevFindUSBDevice;
>  virHostdevManagerGetDefault;
>  virHostdevPCINodeDeviceDetach;
>  virHostdevPCINodeDeviceReAttach;
> diff --git a/src/util/virhostdev.c b/src/util/virhostdev.c
> index 9b5ca6f..9c2262e 100644
> --- a/src/util/virhostdev.c
> +++ b/src/util/virhostdev.c
> @@ -1178,7 +1178,7 @@ virHostdevMarkUSBDevices(virHostdevManagerPtr mgr,
>  }
>  
>  
> -static int
> +int
>  virHostdevFindUSBDevice(virDomainHostdevDefPtr hostdev,
>                          bool mandatory,
>                          virUSBDevicePtr *usb)
> diff --git a/src/util/virhostdev.h b/src/util/virhostdev.h
> index c451981..9bb582b 100644
> --- a/src/util/virhostdev.h
> +++ b/src/util/virhostdev.h
> @@ -66,6 +66,12 @@ virHostdevPreparePCIDevices(virHostdevManagerPtr hostdev_mgr,
>                              unsigned int flags)
>      ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3)
>      ATTRIBUTE_NONNULL(4);
> +
> +int
> +virHostdevFindUSBDevice(virDomainHostdevDefPtr hostdev,
> +                        bool mandatory,
> +                        virUSBDevicePtr *usb)
> +    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3);

ATTRIBUTE_NONNULL(2) is not needed.

I'm fine with exporting this function from virhostdev, but I'd like to hear what
others think since it has some interesting side-affects such as modifying
hostdev->source.subsys.u.usb if the device is found by vendor. My first thought
is that such behavior is internal to the virhostdev module, but populating
hostdev->source.subsys.u.usb->{bus,device} when called externally may be fine.

Regards,
Jim

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