driver core: add uid and gid to devtmpfs
Some drivers want to tell userspace what uid and gid should be used for
their device nodes, so allow that information to percolate through the
driver core to userspace in order to make this happen. This means that
some systems (i.e. Android and friends) will not need to even run a
udev-like daemon for their device node manager and can just rely in
devtmpfs fully, reducing their footprint even more.
Signed-off-by: Kay Sievers <kay@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/include/linux/device.h b/include/linux/device.h
index 4a7c4a8..851b85c 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -25,6 +25,7 @@
#include <linux/pm.h>
#include <linux/atomic.h>
#include <linux/ratelimit.h>
+#include <linux/uidgid.h>
#include <asm/device.h>
struct device;
@@ -465,7 +466,8 @@
const char *name;
const struct attribute_group **groups;
int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
- char *(*devnode)(struct device *dev, umode_t *mode);
+ char *(*devnode)(struct device *dev, umode_t *mode,
+ uid_t *uid, gid_t *gid);
void (*release)(struct device *dev);
const struct dev_pm_ops *pm;
@@ -843,7 +845,8 @@
extern int device_move(struct device *dev, struct device *new_parent,
enum dpm_order dpm_order);
extern const char *device_get_devnode(struct device *dev,
- umode_t *mode, const char **tmp);
+ umode_t *mode, uid_t *uid, gid_t *gid,
+ const char **tmp);
extern void *dev_get_drvdata(const struct device *dev);
extern int dev_set_drvdata(struct device *dev, void *data);