1 #include <linux/fsnotify_backend.h> 2 #include <linux/path.h> 3 #include <linux/slab.h> 4 5 extern struct kmem_cache *fanotify_mark_cache; 6 extern struct kmem_cache *fanotify_event_cachep; 7 extern struct kmem_cache *fanotify_perm_event_cachep; 8 9 /* 10 * Structure for normal fanotify events. It gets allocated in 11 * fanotify_handle_event() and freed when the information is retrieved by 12 * userspace 13 */ 14 struct fanotify_event_info { 15 struct fsnotify_event fse; 16 /* 17 * We hold ref to this path so it may be dereferenced at any point 18 * during this object's lifetime 19 */ 20 struct path path; 21 struct pid *tgid; 22 }; 23 24 #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS 25 /* 26 * Structure for permission fanotify events. It gets allocated and freed in 27 * fanotify_handle_event() since we wait there for user response. When the 28 * information is retrieved by userspace the structure is moved from 29 * group->notification_list to group->fanotify_data.access_list to wait for 30 * user response. 31 */ 32 struct fanotify_perm_event_info { 33 struct fanotify_event_info fae; 34 int response; /* userspace answer to question */ 35 int fd; /* fd we passed to userspace for this event */ 36 }; 37 38 static inline struct fanotify_perm_event_info * 39 FANOTIFY_PE(struct fsnotify_event *fse) 40 { 41 return container_of(fse, struct fanotify_perm_event_info, fae.fse); 42 } 43 #endif 44 45 static inline struct fanotify_event_info *FANOTIFY_E(struct fsnotify_event *fse) 46 { 47 return container_of(fse, struct fanotify_event_info, fse); 48 } 49 50 struct fanotify_event_info *fanotify_alloc_event(struct inode *inode, u32 mask, 51 const struct path *path); 52