Re: [PATCH v2] vhost: add vsock compat ioctl

[Stefan Hajnoczi]

On Wed, Mar 14, 2018 at 02:36:25PM -0700, Sonny Rao wrote:
> This will allow usage of vsock from 32-bit binaries on a 64-bit
> kernel.
> 
> Signed-off-by: Sonny Rao 
> ---
>  drivers/vhost/vsock.c | 11 +++
>  1 file changed, 11 insertions(+)

Reviewed-by: Stefan Hajnoczi 


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[PATCH v2] vhost: add vsock compat ioctl

[Sonny Rao]

This will allow usage of vsock from 32-bit binaries on a 64-bit
kernel.

Signed-off-by: Sonny Rao 
---
 drivers/vhost/vsock.c | 11 +++
 1 file changed, 11 insertions(+)

diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c
index 0d14e2ff19f16..ee0c385d9fe54 100644
--- a/drivers/vhost/vsock.c
+++ b/drivers/vhost/vsock.c
@@ -699,12 +699,23 @@ static long vhost_vsock_dev_ioctl(struct file *f, 
unsigned int ioctl,
}
 }
 
+#ifdef CONFIG_COMPAT
+static long vhost_vsock_dev_compat_ioctl(struct file *f, unsigned int ioctl,
+unsigned long arg)
+{
+   return vhost_vsock_dev_ioctl(f, ioctl, (unsigned long)compat_ptr(arg));
+}
+#endif
+
 static const struct file_operations vhost_vsock_fops = {
.owner  = THIS_MODULE,
.open   = vhost_vsock_dev_open,
.release= vhost_vsock_dev_release,
.llseek = noop_llseek,
.unlocked_ioctl = vhost_vsock_dev_ioctl,
+#ifdef CONFIG_COMPAT
+   .compat_ioctl   = vhost_vsock_dev_compat_ioctl,
+#endif
 };
 
 static struct miscdevice vhost_vsock_misc = {
-- 
2.13.5