text: /* SPDX-License-Identifier: GPL-2.0 */
  #include <linux/fsnotify_backend.h>
  #include <linux/path.h>
  #include <linux/slab.h>
  
  extern struct kmem_cache *fanotify_mark_cache;
  extern struct kmem_cache *fanotify_event_cachep;
  extern struct kmem_cache *fanotify_perm_event_cachep;
  
  /*
   * Structure for normal fanotify events. It gets allocated in
   * fanotify_handle_event() and freed when the information is retrieved by
   * userspace
   */
  struct fanotify_event_info {
  	struct fsnotify_event fse;
  	/*
  	 * We hold ref to this path so it may be dereferenced at any point
  	 * during this object's lifetime
  	 */
  	struct path path;
  	struct pid *tgid;
  };
  
  #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
  /*
   * Structure for permission fanotify events. It gets allocated and freed in
   * fanotify_handle_event() since we wait there for user response. When the
   * information is retrieved by userspace the structure is moved from
   * group->notification_list to group->fanotify_data.access_list to wait for
   * user response.
   */
  struct fanotify_perm_event_info {
  	struct fanotify_event_info fae;
  	int response;	/* userspace answer to question */
  	int fd;		/* fd we passed to userspace for this event */
  };
  
  static inline struct fanotify_perm_event_info *
  FANOTIFY_PE(struct fsnotify_event *fse)
  {
  	return container_of(fse, struct fanotify_perm_event_info, fae.fse);
  }
  #endif
  
  static inline struct fanotify_event_info *FANOTIFY_E(struct fsnotify_event *fse)
  {
  	return container_of(fse, struct fanotify_event_info, fse);
  }
  
  struct fanotify_event_info *fanotify_alloc_event(struct inode *inode, u32 mask,
  						 const struct path *path);
  