Re: [Qemu-devel] [PATCH v2] block/raw-posix: Linux compat-ioctl warning workaround

[Kevin Wolf]

Am 29.06.2011 16:25, schrieb Johannes Stezenbach:
> On Linux x86_64 host with 32bit userspace, running
> qemu or even just "qemu-img create -f qcow2 some.img 1G"
> causes a kernel warning:
> 
> ioctl32(qemu-img:5296): Unknown cmd fd(3) cmd(00005326){t:'S';sz:0} 
> arg(7fffffff) on some.img
> ioctl32(qemu-img:5296): Unknown cmd fd(3) cmd(801c0204){t:02;sz:28} 
> arg(fff77350) on some.img
> 
> ioctl 00005326 is CDROM_DRIVE_STATUS,
> ioctl 801c0204 is FDGETPRM.
> 
> The warning appears because the Linux compat-ioctl handler for these
> ioctls only applies to block devices, while qemu also uses the ioctls on
> plain files.  Work around by calling fstat() the ensure the ioctls are
> only used on block devices.
> 
> Signed-off-by: Johannes Stezenbach <address@hidden>

Thanks, applied to the block branch.

Kevin