include/linux/device_cgroup.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #include <linux/fs.h>
   3
   4 #ifdef CONFIG_CGROUP_DEVICE
   5 extern int __devcgroup_inode_permission(struct inode *inode, int mask);
   6 extern int devcgroup_inode_mknod(int mode, dev_t dev);
   7 static inline int devcgroup_inode_permission(struct inode *inode, int mask)
   8 {
   9         if (likely(!inode->i_rdev))
  10                 return 0;
  11         if (!S_ISBLK(inode->i_mode) && !S_ISCHR(inode->i_mode))
  12                 return 0;
  13         return __devcgroup_inode_permission(inode, mask);
  14 }
  15 #else
  16 static inline int devcgroup_inode_permission(struct inode *inode, int mask)
  17 { return 0; }
  18 static inline int devcgroup_inode_mknod(int mode, dev_t dev)
  19 { return 0; }
  20 #endif