--- zzzz-none-000/linux-4.9.276/include/linux/fsnotify.h	2021-07-20 14:21:16.000000000 +0000
+++ falcon-5530-750/linux-4.9.276/include/linux/fsnotify.h	2023-04-05 08:19:02.000000000 +0000
@@ -25,6 +25,16 @@
 	return __fsnotify_parent(path, dentry, mask);
 }
 
+
+/* Notify this dentry's parent about a child's events. */
+static inline int fsnotify_parent_recursive(struct path *path, struct dentry *dentry, struct dentry *first_parent, const char *name, __u32 mask, u32 fs_cookie)
+{
+	if (!dentry)
+		dentry = path->dentry;
+
+	return __fsnotify_parent_recursive(path, dentry, first_parent, name, mask, fs_cookie);
+}
+
 /* simple call site for access decisions */
 static inline int fsnotify_perm(struct file *file, int mask)
 {
@@ -52,6 +62,10 @@
 	if (ret)
 		return ret;
 
+	ret = fsnotify_parent_recursive(path, NULL, NULL, NULL, fsnotify_mask, 0);
+	if (ret)
+		return ret;
+
 	return fsnotify(inode, fsnotify_mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
 }
 
@@ -63,6 +77,7 @@
 	fsnotify(inode, FS_ATTRIB, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
 }
 
+extern void __fsnotify_update_child_dentry_flags(struct inode *inode);
 /*
  * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir
  */
@@ -75,19 +90,27 @@
 	__u32 old_dir_mask = (FS_EVENT_ON_CHILD | FS_MOVED_FROM);
 	__u32 new_dir_mask = (FS_EVENT_ON_CHILD | FS_MOVED_TO);
 	const unsigned char *new_name = moved->d_name.name;
+	struct dentry *old_dir_dentry;
 
-	if (old_dir == new_dir)
+	if (old_dir == new_dir) {
 		old_dir_mask |= FS_DN_RENAME;
+		old_dir_dentry = NULL;
+	} else {
+		old_dir_dentry = d_find_any_alias(old_dir);
+	}
 
 	if (isdir) {
 		old_dir_mask |= FS_ISDIR;
 		new_dir_mask |= FS_ISDIR;
 	}
 
+	fsnotify_parent_recursive(NULL, moved, old_dir_dentry, old_name, old_dir_mask, fs_cookie);
 	fsnotify(old_dir, old_dir_mask, source, FSNOTIFY_EVENT_INODE, old_name,
 		 fs_cookie);
+	fsnotify_parent_recursive(NULL, moved, NULL, new_name, new_dir_mask, fs_cookie);
 	fsnotify(new_dir, new_dir_mask, source, FSNOTIFY_EVENT_INODE, new_name,
 		 fs_cookie);
+	__fsnotify_update_child_dentry_flags(new_dir);
 
 	if (target)
 		fsnotify_link_count(target);
@@ -95,6 +118,9 @@
 	if (source)
 		fsnotify(source, FS_MOVE_SELF, moved->d_inode, FSNOTIFY_EVENT_INODE, NULL, 0);
 	audit_inode_child(new_dir, moved, AUDIT_TYPE_CHILD_CREATE);
+
+	if (old_dir_dentry)
+		dput(old_dir_dentry);
 }
 
 /*
@@ -124,6 +150,7 @@
 		mask |= FS_ISDIR;
 
 	fsnotify_parent(NULL, dentry, mask);
+	fsnotify_parent_recursive(NULL, dentry, NULL, NULL, mask, 0);
 }
 
 /*
@@ -142,6 +169,7 @@
 {
 	audit_inode_child(inode, dentry, AUDIT_TYPE_CHILD_CREATE);
 
+	fsnotify_parent_recursive(NULL, dentry, NULL, NULL, FS_CREATE, 0);
 	fsnotify(inode, FS_CREATE, dentry->d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0);
 }
 
@@ -155,6 +183,7 @@
 	fsnotify_link_count(inode);
 	audit_inode_child(dir, new_dentry, AUDIT_TYPE_CHILD_CREATE);
 
+	fsnotify_parent_recursive(NULL, new_dentry, NULL, NULL, FS_CREATE, 0);
 	fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE, new_dentry->d_name.name, 0);
 }
 
@@ -168,6 +197,7 @@
 
 	audit_inode_child(inode, dentry, AUDIT_TYPE_CHILD_CREATE);
 
+	fsnotify_parent_recursive(NULL, dentry, NULL, NULL, mask, 0);
 	fsnotify(inode, mask, d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0);
 }
 
@@ -185,6 +215,7 @@
 
 	if (!(file->f_mode & FMODE_NONOTIFY)) {
 		fsnotify_parent(path, NULL, mask);
+		fsnotify_parent_recursive(path, NULL, NULL, NULL, mask, 0);
 		fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
 	}
 }
@@ -203,6 +234,7 @@
 
 	if (!(file->f_mode & FMODE_NONOTIFY)) {
 		fsnotify_parent(path, NULL, mask);
+		fsnotify_parent_recursive(path, NULL, NULL, NULL, mask, 0);
 		fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
 	}
 }
@@ -220,6 +252,7 @@
 		mask |= FS_ISDIR;
 
 	fsnotify_parent(path, NULL, mask);
+	fsnotify_parent_recursive(path, NULL, NULL, NULL, mask, 0);
 	fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
 }
 
@@ -238,6 +271,7 @@
 
 	if (!(file->f_mode & FMODE_NONOTIFY)) {
 		fsnotify_parent(path, NULL, mask);
+		fsnotify_parent_recursive(path, NULL, NULL, NULL, mask, 0);
 		fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
 	}
 }
@@ -254,6 +288,7 @@
 		mask |= FS_ISDIR;
 
 	fsnotify_parent(NULL, dentry, mask);
+	fsnotify_parent_recursive(NULL, dentry, NULL, NULL, mask, 0);
 	fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
 }
 
@@ -289,6 +324,7 @@
 			mask |= FS_ISDIR;
 
 		fsnotify_parent(NULL, dentry, mask);
+		fsnotify_parent_recursive(NULL, dentry, NULL, NULL, mask, 0);
 		fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
 	}
 }