1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index e3d1c33d1558..d44a99650af3 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -64,6 +64,10 @@ typedef int (*dm_status_fn) (struct dm_target *ti, status_type_t status_type,
 
 typedef int (*dm_message_fn) (struct dm_target *ti, unsigned argc, char **argv);
 
+typedef int (*dm_ioctl_fn) (struct dm_target *ti, struct inode *inode,
+                            struct file *filp, unsigned int cmd,
+                            unsigned long arg);
+
 void dm_error(const char *message);
 
 /*
@@ -91,6 +95,7 @@ struct target_type {
         dm_resume_fn resume;
         dm_status_fn status;
         dm_message_fn message;
+        dm_ioctl_fn ioctl;
 };
 
 struct io_restrictions {