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vfio: Set container device mode

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Minor 0 is the VFIO container device (/dev/vfio/vfio).  On it's own
the container does not provide a user with any privileged access.  It
only supports API version check and extension check ioctls.  Only by
attaching a VFIO group to the container does it gain any access.  Set
the mode of the container to allow access.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Alex Williamson 2013-04-30 15:42:28 -06:00
parent 0b43c08233
commit 664e9386bd
1 changed files with 4 additions and 0 deletions
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4
drivers/vfio/vfio.c
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@ -27,6 +27,7 @@
#include <linux/rwsem.h> #include <linux/rwsem.h>
#include <linux/sched.h> #include <linux/sched.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/stat.h>
#include <linux/string.h> #include <linux/string.h>
#include <linux/uaccess.h> #include <linux/uaccess.h>
#include <linux/vfio.h> #include <linux/vfio.h>
@ -1359,6 +1360,9 @@ static const struct file_operations vfio_device_fops = {
*/ */
static char *vfio_devnode(struct device *dev, umode_t *mode) static char *vfio_devnode(struct device *dev, umode_t *mode)
{ {
if (MINOR(dev->devt) == 0)
*mode = S_IRUGO | S_IWUGO;
return kasprintf(GFP_KERNEL, "vfio/%s", dev_name(dev)); return kasprintf(GFP_KERNEL, "vfio/%s", dev_name(dev));
} }