[linux-2.6-block.git] / fs / notify / fanotify / fanotify.h

#include <linux/fsnotify_backend.h>
#include <linux/path.h>
#include <linux/slab.h>

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,
						 struct path *path);
Commit	Line	Data
7053aee2 JK	1	#include <linux/fsnotify_backend.h>
	2	#include <linux/path.h>
	3	#include <linux/slab.h>
	4
	5	extern struct kmem_cache *fanotify_event_cachep;
f083441b	6	extern struct kmem_cache *fanotify_perm_event_cachep;
7053aee2	7
85816794	8	/*
f083441b JK	9	* Structure for normal fanotify events. It gets allocated in
	10	* fanotify_handle_event() and freed when the information is retrieved by
	11	* userspace
85816794	12	*/
7053aee2 JK	13	struct 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;
f083441b JK	21	};
f083441b JK	22
7053aee2	23	#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
f083441b JK	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	*/
	31	struct 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 */
7053aee2 JK	35	};
7053aee2 JK	36
f083441b JK	37	static inline struct fanotify_perm_event_info *
	38	FANOTIFY_PE(struct fsnotify_event *fse)
	39	{
	40	return container_of(fse, struct fanotify_perm_event_info, fae.fse);
	41	}
	42	#endif
	43
7053aee2 JK	44	static inline struct fanotify_event_info FANOTIFY_E(struct fsnotify_event fse)
	45	{
	46	return container_of(fse, struct fanotify_event_info, fse);
	47	}
f083441b JK	48
	49	struct fanotify_event_info fanotify_alloc_event(struct inode inode, u32 mask,
	50	struct path *path);