fsnotify: store struct file not struct path

Al explains that calling dentry_open() with a mnt/dentry pair is only
garunteed to be safe if they are already used in an open struct file.  To
make sure this is the case don't store and use a struct path in fsnotify,
always use a struct file.

Signed-off-by: Eric Paris <eparis@redhat.com>

1 files changed, 8 insertions, 8 deletions

diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 564b5ea4a83..3410d388163 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -223,20 +223,20 @@ struct fsnotify_event {
         /* to_tell may ONLY be dereferenced during handle_event(). */
         struct inode *to_tell;  /* either the inode the event happened to or its parent */
         /*
-         * depending on the event type we should have either a path or inode
-         * We hold a reference on path, but NOT on inode.  Since we have the ref on
-         * the path, it may be dereferenced at any point during this object's
+         * depending on the event type we should have either a file or inode
+         * We hold a reference on file, but NOT on inode.  Since we have the ref on
+         * the file, it may be dereferenced at any point during this object's
          * lifetime.  That reference is dropped when this object's refcnt hits
-         * 0.  If this event contains an inode instead of a path, the inode may
+         * 0.  If this event contains an inode instead of a file, the inode may
          * ONLY be used during handle_event().
          */
         union {
-                struct path path;
+                struct file *file;
                 struct inode *inode;
         };
 /* when calling fsnotify tell it if the data is a path or inode */
 #define FSNOTIFY_EVENT_NONE     0
-#define FSNOTIFY_EVENT_PATH     1
+#define FSNOTIFY_EVENT_FILE     1
 #define FSNOTIFY_EVENT_INODE    2
         int data_type;          /* which of the above union we have */
         atomic_t refcnt;        /* how many groups still are using/need to send this event */
@@ -311,7 +311,7 @@ struct fsnotify_mark {
 /* main fsnotify call to send events */
 extern int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
                     const unsigned char *name, u32 cookie);
-extern void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask);
+extern void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask);
 extern void __fsnotify_inode_delete(struct inode *inode);
 extern void __fsnotify_vfsmount_delete(struct vfsmount *mnt);
 extern u32 fsnotify_get_cookie(void);
@@ -444,7 +444,7 @@ static inline int fsnotify(struct inode *to_tell, __u32 mask, void *data, int da
         return 0;
 }
 
-static inline void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
+static inline void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
 {}
 
 static inline void __fsnotify_inode_delete(struct inode *inode)