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Re: [libvirt] [PATCH 10/23] Add support for USB host device passthrough with LXC



On Fri, Dec 14, 2012 at 03:31:39PM +0800, Gao feng wrote:
> On 2012/12/01 04:26, Daniel P. Berrange wrote:
> > From: "Daniel P. Berrange" <berrange redhat com>
> > 
> > This adds support for host device passthrough with the
> > LXC driver. Since there is only a single kernel image,
> > it doesn't make sense to pass through PCI devices, but
> > USB devices are fine. For the latter we merely need to
> > make the /dev/bus/usb/NNN/MMM character device exist
> > in the container's /dev
> > 
> > Signed-off-by: Daniel P. Berrange <berrange redhat com>
> > ---
> 
> [...]
> 
> >  
> >  
> > +static int lxcContainerSetupHostdevSubsysUSB(virDomainDefPtr vmDef ATTRIBUTE_UNUSED,
> > +                                             virDomainHostdevDefPtr def ATTRIBUTE_UNUSED,
> > +                                             const char *dstprefix ATTRIBUTE_UNUSED,
> > +                                             virSecurityManagerPtr securityDriver ATTRIBUTE_UNUSED)
> > +{
> > +    int ret = -1;
> > +    char *src = NULL;
> > +    char *dstdir = NULL;
> > +    char *dstfile = NULL;
> > +    struct stat sb;
> > +    mode_t mode;
> > +
> > +    if (virAsprintf(&dstdir, "/dev/bus/usb/%03d",
> > +                    def->source.subsys.u.usb.bus) < 0) {
> 
> better to use USB_DEVFS instead of /dev/bus/usb/

Yep, will change that

Daniel
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