@@ -263,10 +263,19 @@ static const void *device_namespace(struct kobject *kobj)
return ns;
}
+static void device_get_ownership(struct kobject *kobj, kuid_t *uid, kgid_t *gid)
+{
+ struct device *dev = kobj_to_dev(kobj);
+
+ if (dev->class && dev->class->get_ownership)
+ dev->class->get_ownership(dev, uid, gid);
+}
+
static struct kobj_type device_ktype = {
.release = device_release,
.sysfs_ops = &dev_sysfs_ops,
.namespace = device_namespace,
+ .get_ownership = device_get_ownership,
};
@@ -374,6 +374,9 @@ int subsys_virtual_register(struct bus_type *subsys,
* @resume: Used to bring the device from the sleep mode.
* @ns_type: Callbacks so sysfs can detemine namespaces.
* @namespace: Namespace of the device belongs to this class.
+ * @get_ownership: Allows class to specify uid/gid of the sysfs directories
+ * for the devices belonging to the class. Usually tied to
+ * device's namespace.
* @pm: The default device power management operations of this class.
* @p: The private data of the driver core, no one other than the
* driver core can touch this.
@@ -404,6 +407,8 @@ struct class {
const struct kobj_ns_type_operations *ns_type;
const void *(*namespace)(struct device *dev);
+ void (*get_ownership)(struct device *dev, kuid_t *uid, kgid_t *gid);
+
const struct dev_pm_ops *pm;
struct subsys_private *p;
Plumb in get_ownership() callback for devices belonging to a class so that they can be created with uid/gid different from global root. This will allow network devices in a container to belong to container's root and not global root. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> --- drivers/base/core.c | 9 +++++++++ include/linux/device.h | 5 +++++ 2 files changed, 14 insertions(+)