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Driver-Core: extend devnode callbacks to provide permissions

Browse source 
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 <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Kay Sievers 2009-09-18 23:01:12 +02:00 • committed by Live-CD User
commit e454cea20b
30 changed files with 116 additions and 79 deletions
Download patch file Download diff file Expand all files Collapse all files

4
drivers/usb/class/usblp.c
View file

@ -1057,14 +1057,14 @@ static const struct file_operations usblp_fops = {
.release = usblp_release,
};
static char *usblp_nodename(struct device *dev)
static char *usblp_devnode(struct device *dev, mode_t *mode)
{
return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev));
}
static struct usb_class_driver usblp_class = {
.name = "lp%d",
.nodename = usblp_nodename,
.devnode = usblp_devnode,
.fops = &usblp_fops,
.minor_base = USBLP_MINOR_BASE,
};

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,
};

4
drivers/usb/misc/iowarrior.c
View file

@ -727,7 +727,7 @@ static const struct file_operations iowarrior_fops = {
.poll = iowarrior_poll,
};
static char *iowarrior_nodename(struct device *dev)
static char *iowarrior_devnode(struct device *dev, mode_t *mode)
{
return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev));
}
@ -738,7 +738,7 @@ static char *iowarrior_nodename(struct device *dev)
*/
static struct usb_class_driver iowarrior_class = {
.name = "iowarrior%d",
.nodename = iowarrior_nodename,
.devnode = iowarrior_devnode,
.fops = &iowarrior_fops,
.minor_base = IOWARRIOR_MINOR_BASE,
};

4
drivers/usb/misc/legousbtower.c
View file

@ -266,7 +266,7 @@ static const struct file_operations tower_fops = {
.llseek = tower_llseek,
};
static char *legousbtower_nodename(struct device *dev)
static char *legousbtower_devnode(struct device *dev, mode_t *mode)
{
return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev));
}
@ -277,7 +277,7 @@ static char *legousbtower_nodename(struct device *dev)
*/
static struct usb_class_driver tower_class = {
.name = "legousbtower%d",
.nodename = legousbtower_nodename,
.devnode = legousbtower_devnode,
.fops = &tower_fops,
.minor_base = LEGO_USB_TOWER_MINOR_BASE,
};