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Driver-Core: extend devnode callbacks to provide permissions

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This allows subsytems to provide devtmpfs with non-default permissions
for the device node. Instead of the default mode of 0600, null, zero,
random, urandom, full, tty, ptmx now have a mode of 0666, which allows
non-privileged processes to access standard device nodes in case no
other userspace process applies the expected permissions.

This also fixes a wrong assignment in pktcdvd and a checkpatch.pl complain.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers
2009-09-18 23:01:12 +02:00
committed by Live-CD User
parent 78f28b7c55
commit e454cea20b
30 changed files with 116 additions and 79 deletions
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8
drivers/usb/core/file.c
View File

@ -67,14 +67,14 @@ static struct usb_class {
struct class *class;
} *usb_class;
static char *usb_nodename(struct device *dev)
static char *usb_devnode(struct device *dev, mode_t *mode)
{
struct usb_class_driver *drv;
drv = dev_get_drvdata(dev);
if (!drv || !drv->nodename)
if (!drv || !drv->devnode)
return NULL;
return drv->nodename(dev);
return drv->devnode(dev, mode);
}
static int init_usb_class(void)
@ -100,7 +100,7 @@ static int init_usb_class(void)
kfree(usb_class);
usb_class = NULL;
}
usb_class->class->nodename = usb_nodename;
usb_class->class->devnode = usb_devnode;
exit:
return result;

4
drivers/usb/core/usb.c
View File

@ -311,7 +311,7 @@ static struct dev_pm_ops usb_device_pm_ops = {
#endif /* CONFIG_PM */
static char *usb_nodename(struct device *dev)
static char *usb_devnode(struct device *dev, mode_t *mode)
{
struct usb_device *usb_dev;
@ -324,7 +324,7 @@ struct device_type usb_device_type = {
.name = "usb_device",
.release = usb_release_dev,
.uevent = usb_dev_uevent,
.nodename = usb_nodename,
.devnode = usb_devnode,
.pm = &usb_device_pm_ops,
};