/* SPDX-License-Identifier: GPL-2.0 */
  #include <linux/atomic.h>
  #include <linux/debugfs.h>
  #include <linux/notifier.h>
  
  struct notifier_err_inject_action {
  	unsigned long val;
  	int error;
  	const char *name;
  };
  
  #define NOTIFIER_ERR_INJECT_ACTION(action)	\
  	.name = #action, .val = (action),
  
  struct notifier_err_inject {
  	struct notifier_block nb;
  	struct notifier_err_inject_action actions[];
  	/* The last slot must be terminated with zero sentinel */
  };
  
  extern struct dentry *notifier_err_inject_dir;
  
  extern struct dentry *notifier_err_inject_init(const char *name,
  		struct dentry *parent, struct notifier_err_inject *err_inject,
  		int priority);