fsnotify: send struct file when sending events to parents when possible

fanotify needs a path in order to open an fd to the object which changed.
Currently notifications to inode's parents are done using only the inode.
For some parental notification we have the entire file, send that so
fanotify can use it.

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

1 files changed, 10 insertions, 3 deletions

diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 523337b600a0..806beede24a3 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -78,13 +78,16 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
 }
 
 /* Notify this dentry's parent about a child's events. */
-void __fsnotify_parent(struct dentry *dentry, __u32 mask)
+void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
 {
         struct dentry *parent;
         struct inode *p_inode;
         bool send = false;
         bool should_update_children = false;
 
+        if (file)
+                dentry = file->f_path.dentry;
+
         if (!(dentry->d_flags & DCACHE_FSNOTIFY_PARENT_WATCHED))
                 return;
 
@@ -115,8 +118,12 @@ void __fsnotify_parent(struct dentry *dentry, __u32 mask)
                  * specifies these are events which came from a child. */
                 mask |= FS_EVENT_ON_CHILD;
 
-                fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE,
-                         dentry->d_name.name, 0);
+                if (file)
+                        fsnotify(p_inode, mask, file, FSNOTIFY_EVENT_FILE,
+                                 dentry->d_name.name, 0);
+                else
+                        fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE,
+                                 dentry->d_name.name, 0);
                 dput(parent);
         }