1 files changed, 106 insertions, 2 deletions

diff --git a/include/linux/inotify.h b/include/linux/inotify.h
index 71aa1553ef38..d4f48c6402e6 100644
--- a/include/linux/inotify.h
+++ b/include/linux/inotify.h
@@ -68,18 +68,65 @@ struct inotify_event {
 #include <linux/dcache.h>
 #include <linux/fs.h>
 
+/*
+ * struct inotify_watch - represents a watch request on a specific inode
+ *
+ * h_list is protected by ih->mutex of the associated inotify_handle.
+ * i_list, mask are protected by inode->inotify_mutex of the associated inode.
+ * ih, inode, and wd are never written to once the watch is created.
+ *
+ * Callers must use the established inotify interfaces to access inotify_watch
+ * contents.  The content of this structure is private to the inotify
+ * implementation.
+ */
+struct inotify_watch {
+        struct list_head        h_list; /* entry in inotify_handle's list */
+        struct list_head        i_list; /* entry in inode's list */
+        atomic_t                count;  /* reference count */
+        struct inotify_handle   *ih;    /* associated inotify handle */
+        struct inode            *inode; /* associated inode */
+        __s32                   wd;     /* watch descriptor */
+        __u32                   mask;   /* event mask for this watch */
+};
+
+struct inotify_operations {
+        void (*handle_event)(struct inotify_watch *, u32, u32, u32,
+                             const char *, struct inode *);
+        void (*destroy_watch)(struct inotify_watch *);
+};
+
 #ifdef CONFIG_INOTIFY
 
+/* Kernel API for producing events */
+
 extern void inotify_d_instantiate(struct dentry *, struct inode *);
 extern void inotify_d_move(struct dentry *);
 extern void inotify_inode_queue_event(struct inode *, __u32, __u32,
-                                      const char *);
+                                      const char *, struct inode *);
 extern void inotify_dentry_parent_queue_event(struct dentry *, __u32, __u32,
                                               const char *);
 extern void inotify_unmount_inodes(struct list_head *);
 extern void inotify_inode_is_dead(struct inode *);
 extern u32 inotify_get_cookie(void);
 
+/* Kernel Consumer API */
+
+extern struct inotify_handle *inotify_init(const struct inotify_operations *);
+extern void inotify_init_watch(struct inotify_watch *);
+extern void inotify_destroy(struct inotify_handle *);
+extern __s32 inotify_find_watch(struct inotify_handle *, struct inode *,
+                                struct inotify_watch **);
+extern __s32 inotify_find_update_watch(struct inotify_handle *, struct inode *,
+                                       u32);
+extern __s32 inotify_add_watch(struct inotify_handle *, struct inotify_watch *,
+                               struct inode *, __u32);
+extern int inotify_rm_watch(struct inotify_handle *, struct inotify_watch *);
+extern int inotify_rm_wd(struct inotify_handle *, __u32);
+extern void inotify_remove_watch_locked(struct inotify_handle *,
+                                        struct inotify_watch *);
+extern void get_inotify_watch(struct inotify_watch *);
+extern void put_inotify_watch(struct inotify_watch *);
+
 #else
 
 static inline void inotify_d_instantiate(struct dentry *dentry,
@@ -93,7 +140,8 @@ static inline void inotify_d_move(struct dentry *dentry)
 
 static inline void inotify_inode_queue_event(struct inode *inode,
                                              __u32 mask, __u32 cookie,
-                                             const char *filename)
+                                             const char *filename,
+                                             struct inode *n_inode)
 {
 }
 
@@ -116,6 +164,62 @@ static inline u32 inotify_get_cookie(void)
         return 0;
 }
 
+static inline struct inotify_handle *inotify_init(const struct inotify_operations *ops)
+{
+        return ERR_PTR(-EOPNOTSUPP);
+}
+
+static inline void inotify_init_watch(struct inotify_watch *watch)
+{
+}
+
+static inline void inotify_destroy(struct inotify_handle *ih)
+{
+}
+
+static inline __s32 inotify_find_watch(struct inotify_handle *ih, struct inode *inode,
+                                       struct inotify_watch **watchp)
+{
+        return -EOPNOTSUPP;
+}
+
+static inline __s32 inotify_find_update_watch(struct inotify_handle *ih,
+                                              struct inode *inode, u32 mask)
+{
+        return -EOPNOTSUPP;
+}
+
+static inline __s32 inotify_add_watch(struct inotify_handle *ih,
+                                      struct inotify_watch *watch,
+                                      struct inode *inode, __u32 mask)
+{
+        return -EOPNOTSUPP;
+}
+
+static inline int inotify_rm_watch(struct inotify_handle *ih,
+                                   struct inotify_watch *watch)
+{
+        return -EOPNOTSUPP;
+}
+
+static inline int inotify_rm_wd(struct inotify_handle *ih, __u32 wd)
+{
+        return -EOPNOTSUPP;
+}
+
+static inline void inotify_remove_watch_locked(struct inotify_handle *ih,
+                                               struct inotify_watch *watch)
+{
+}
+
+static inline void get_inotify_watch(struct inotify_watch *watch)
+{
+}
+
+static inline void put_inotify_watch(struct inotify_watch *watch)
+{
+}
+
 #endif  /* CONFIG_INOTIFY */
 
 #endif  /* __KERNEL __ */