fs/notify/fanotify/fanotify.h

   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;
   6 extern 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  */
  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;
  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  */
  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 */
  35 };
  36
  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
  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 }
  48
  49 struct fanotify_event_info *fanotify_alloc_event(struct inode *inode, u32 mask,
  50                                                  struct path *path);