1#include <linux/fsnotify_backend.h>
2#include <linux/path.h>
3#include <linux/slab.h>
4
5extern struct kmem_cache *fanotify_event_cachep;
6extern struct kmem_cache *fanotify_perm_event_cachep;
7
8/*
9 * Structure for normal fanotify events. It gets allocated in
10 * fanotify_handle_event() and freed when the information is retrieved by
11 * userspace
12 */
13struct fanotify_event_info {
14	struct fsnotify_event fse;
15	/*
16	 * We hold ref to this path so it may be dereferenced at any point
17	 * during this object's lifetime
18	 */
19	struct path path;
20	struct pid *tgid;
21};
22
23#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
24/*
25 * Structure for permission fanotify events. It gets allocated and freed in
26 * fanotify_handle_event() since we wait there for user response. When the
27 * information is retrieved by userspace the structure is moved from
28 * group->notification_list to group->fanotify_data.access_list to wait for
29 * user response.
30 */
31struct fanotify_perm_event_info {
32	struct fanotify_event_info fae;
33	int response;	/* userspace answer to question */
34	int fd;		/* fd we passed to userspace for this event */
35};
36
37static inline struct fanotify_perm_event_info *
38FANOTIFY_PE(struct fsnotify_event *fse)
39{
40	return container_of(fse, struct fanotify_perm_event_info, fae.fse);
41}
42#endif
43
44static inline struct fanotify_event_info *FANOTIFY_E(struct fsnotify_event *fse)
45{
46	return container_of(fse, struct fanotify_event_info, fse);
47}
48
49struct fanotify_event_info *fanotify_alloc_event(struct inode *inode, u32 mask,
50						 struct path *path);
51