const char *tmp;
const char *name;
umode_t mode = 0;
+ kuid_t uid = GLOBAL_ROOT_UID;
+ kgid_t gid = GLOBAL_ROOT_GID;
add_uevent_var(env, "MAJOR=%u", MAJOR(dev->devt));
add_uevent_var(env, "MINOR=%u", MINOR(dev->devt));
- name = device_get_devnode(dev, &mode, &tmp);
+ name = device_get_devnode(dev, &mode, &uid, &gid, &tmp);
if (name) {
add_uevent_var(env, "DEVNAME=%s", name);
- kfree(tmp);
if (mode)
add_uevent_var(env, "DEVMODE=%#o", mode & 0777);
+ if (!uid_eq(uid, GLOBAL_ROOT_UID))
+ add_uevent_var(env, "DEVUID=%u", from_kuid(&init_user_ns, uid));
+ if (!gid_eq(gid, GLOBAL_ROOT_GID))
+ add_uevent_var(env, "DEVGID=%u", from_kgid(&init_user_ns, gid));
+ kfree(tmp);
}
}
const struct device_attribute *attr)
{
int error = 0;
- if (dev)
+
+ if (dev) {
+ WARN(((attr->attr.mode & S_IWUGO) && !attr->store),
+ "Write permission without 'store'\n");
+ WARN(((attr->attr.mode & S_IRUGO) && !attr->show),
+ "Read permission without 'show'\n");
error = sysfs_create_file(&dev->kobj, &attr->attr);
+ }
+
return error;
}
* device_get_devnode - path of device node file
* @dev: device
* @mode: returned file access mode
+ * @uid: returned file owner
+ * @gid: returned file group
* @tmp: possibly allocated string
*
* Return the relative path of a possible device node.
* freed by the caller.
*/
const char *device_get_devnode(struct device *dev,
- umode_t *mode, const char **tmp)
+ umode_t *mode, kuid_t *uid, kgid_t *gid,
+ const char **tmp)
{
char *s;
/* the device type may provide a specific name */
if (dev->type && dev->type->devnode)
- *tmp = dev->type->devnode(dev, mode);
+ *tmp = dev->type->devnode(dev, mode, uid, gid);
if (*tmp)
return *tmp;