fsnotify: constify 'data' passed to ->handle_event()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/notify/dnotify/dnotify.c

@@ -85,7 +85,7 @@ static int dnotify_handle_event(struct fsnotify_group *group,
 				struct inode *inode,
 				struct fsnotify_mark *inode_mark,
 				struct fsnotify_mark *vfsmount_mark,
-				u32 mask, void *data, int data_type,
+				u32 mask, const void *data, int data_type,
 				const unsigned char *file_name, u32 cookie)
 {
 	struct dnotify_mark *dn_mark;

fs/notify/fanotify/fanotify.c

@@ -90,10 +90,10 @@ static int fanotify_get_response(struct fsnotify_group *group,
 static bool fanotify_should_send_event(struct fsnotify_mark *inode_mark,
 				       struct fsnotify_mark *vfsmnt_mark,
 				       u32 event_mask,
-				       void *data, int data_type)
+				       const void *data, int data_type)
 {
 	__u32 marks_mask, marks_ignored_mask;
-	struct path *path = data;
+	const struct path *path = data;
 
 	pr_debug("%s: inode_mark=%p vfsmnt_mark=%p mask=%x data=%p"
 		 " data_type=%d\n", __func__, inode_mark, vfsmnt_mark,
@@ -140,7 +140,7 @@ static bool fanotify_should_send_event(struct fsnotify_mark *inode_mark,
 }
 
 struct fanotify_event_info *fanotify_alloc_event(struct inode *inode, u32 mask,
-						 struct path *path)
+						 const struct path *path)
 {
 	struct fanotify_event_info *event;
 
@@ -177,7 +177,7 @@ static int fanotify_handle_event(struct fsnotify_group *group,
 				 struct inode *inode,
 				 struct fsnotify_mark *inode_mark,
 				 struct fsnotify_mark *fanotify_mark,
-				 u32 mask, void *data, int data_type,
+				 u32 mask, const void *data, int data_type,
 				 const unsigned char *file_name, u32 cookie)
 {
 	int ret = 0;

fs/notify/fanotify/fanotify.h

@@ -47,4 +47,4 @@ static inline struct fanotify_event_info *FANOTIFY_E(struct fsnotify_event *fse)
 }
 
 struct fanotify_event_info *fanotify_alloc_event(struct inode *inode, u32 mask,
-						 struct path *path);
+						 const struct path *path);

fs/notify/inotify/inotify.h

@@ -26,7 +26,7 @@ extern int inotify_handle_event(struct fsnotify_group *group,
 				struct inode *inode,
 				struct fsnotify_mark *inode_mark,
 				struct fsnotify_mark *vfsmount_mark,
-				u32 mask, void *data, int data_type,
+				u32 mask, const void *data, int data_type,
 				const unsigned char *file_name, u32 cookie);
 
 extern const struct fsnotify_ops inotify_fsnotify_ops;

fs/notify/inotify/inotify_fsnotify.c

@@ -66,7 +66,7 @@ int inotify_handle_event(struct fsnotify_group *group,
 			 struct inode *inode,
 			 struct fsnotify_mark *inode_mark,
 			 struct fsnotify_mark *vfsmount_mark,
-			 u32 mask, void *data, int data_type,
+			 u32 mask, const void *data, int data_type,
 			 const unsigned char *file_name, u32 cookie)
 {
 	struct inotify_inode_mark *i_mark;
@@ -80,7 +80,7 @@ int inotify_handle_event(struct fsnotify_group *group,
 
 	if ((inode_mark->mask & FS_EXCL_UNLINK) &&
 	    (data_type == FSNOTIFY_EVENT_PATH)) {
-		struct path *path = data;
+		const struct path *path = data;
 
 		if (d_unlinked(path->dentry))
 			return 0;

include/linux/fsnotify_backend.h

@@ -96,7 +96,7 @@ struct fsnotify_ops {
 			    struct inode *inode,
 			    struct fsnotify_mark *inode_mark,
 			    struct fsnotify_mark *vfsmount_mark,
-			    u32 mask, void *data, int data_type,
+			    u32 mask, const void *data, int data_type,
 			    const unsigned char *file_name, u32 cookie);
 	void (*free_group_priv)(struct fsnotify_group *group);
 	void (*freeing_mark)(struct fsnotify_mark *mark, struct fsnotify_group *group);

kernel/audit_fsnotify.c

@@ -74,7 +74,7 @@ int audit_mark_compare(struct audit_fsnotify_mark *mark, unsigned long ino, dev_
 }
 
 static void audit_update_mark(struct audit_fsnotify_mark *audit_mark,
-			     struct inode *inode)
+			     const struct inode *inode)
 {
 	audit_mark->dev = inode ? inode->i_sb->s_dev : AUDIT_DEV_UNSET;
 	audit_mark->ino = inode ? inode->i_ino : AUDIT_INO_UNSET;
@@ -168,11 +168,11 @@ static int audit_mark_handle_event(struct fsnotify_group *group,
 				    struct inode *to_tell,
 				    struct fsnotify_mark *inode_mark,
 				    struct fsnotify_mark *vfsmount_mark,
-				    u32 mask, void *data, int data_type,
+				    u32 mask, const void *data, int data_type,
 				    const unsigned char *dname, u32 cookie)
 {
 	struct audit_fsnotify_mark *audit_mark;
-	struct inode *inode = NULL;
+	const struct inode *inode = NULL;
 
 	audit_mark = container_of(inode_mark, struct audit_fsnotify_mark, mark);
 
@@ -180,10 +180,10 @@ static int audit_mark_handle_event(struct fsnotify_group *group,
 
 	switch (data_type) {
 	case (FSNOTIFY_EVENT_PATH):
-		inode = ((struct path *)data)->dentry->d_inode;
+		inode = ((const struct path *)data)->dentry->d_inode;
 		break;
 	case (FSNOTIFY_EVENT_INODE):
-		inode = (struct inode *)data;
+		inode = (const struct inode *)data;
 		break;
 	default:
 		BUG();

kernel/audit_tree.c

@@ -948,7 +948,7 @@ static int audit_tree_handle_event(struct fsnotify_group *group,
 				   struct inode *to_tell,
 				   struct fsnotify_mark *inode_mark,
 				   struct fsnotify_mark *vfsmount_mark,
-				   u32 mask, void *data, int data_type,
+				   u32 mask, const void *data, int data_type,
 				   const unsigned char *file_name, u32 cookie)
 {
 	return 0;

kernel/audit_watch.c

@@ -472,10 +472,10 @@ static int audit_watch_handle_event(struct fsnotify_group *group,
 				    struct inode *to_tell,
 				    struct fsnotify_mark *inode_mark,
 				    struct fsnotify_mark *vfsmount_mark,
-				    u32 mask, void *data, int data_type,
+				    u32 mask, const void *data, int data_type,
 				    const unsigned char *dname, u32 cookie)
 {
-	struct inode *inode;
+	const struct inode *inode;
 	struct audit_parent *parent;
 
 	parent = container_of(inode_mark, struct audit_parent, mark);
@@ -484,10 +484,10 @@ static int audit_watch_handle_event(struct fsnotify_group *group,
 
 	switch (data_type) {
 	case (FSNOTIFY_EVENT_PATH):
-		inode = d_backing_inode(((struct path *)data)->dentry);
+		inode = d_backing_inode(((const struct path *)data)->dentry);
 		break;
 	case (FSNOTIFY_EVENT_INODE):
-		inode = (struct inode *)data;
+		inode = (const struct inode *)data;
 		break;
 	default:
 		BUG();