1 files changed, 24 insertions, 5 deletions

diff --git a/include/linux/if_tun.h b/include/linux/if_tun.h
index 5bda8cf457b6..043d442994b0 100644
--- a/include/linux/if_tun.h
+++ b/include/linux/if_tun.h
@@ -27,35 +27,54 @@ struct tun_xdp_hdr {
 #if defined(CONFIG_TUN) || defined(CONFIG_TUN_MODULE)
 struct socket *tun_get_socket(struct file *);
 struct ptr_ring *tun_get_tx_ring(struct file *file);
-bool tun_is_xdp_frame(void *ptr);
-void *tun_xdp_to_ptr(void *ptr);
-void *tun_ptr_to_xdp(void *ptr);
+
+static inline bool tun_is_xdp_frame(void *ptr)
+{
+	return (unsigned long)ptr & TUN_XDP_FLAG;
+}
+
+static inline void *tun_xdp_to_ptr(struct xdp_frame *xdp)
+{
+	return (void *)((unsigned long)xdp | TUN_XDP_FLAG);
+}
+
+static inline struct xdp_frame *tun_ptr_to_xdp(void *ptr)
+{
+	return (void *)((unsigned long)ptr & ~TUN_XDP_FLAG);
+}
+
 void tun_ptr_free(void *ptr);
 #else
 #include <linux/err.h>
 #include <linux/errno.h>
 struct file;
 struct socket;
+
 static inline struct socket *tun_get_socket(struct file *f)
 {
 	return ERR_PTR(-EINVAL);
 }
+
 static inline struct ptr_ring *tun_get_tx_ring(struct file *f)
 {
 	return ERR_PTR(-EINVAL);
 }
+
 static inline bool tun_is_xdp_frame(void *ptr)
 {
 	return false;
 }
-static inline void *tun_xdp_to_ptr(void *ptr)
+
+static inline void *tun_xdp_to_ptr(struct xdp_frame *xdp)
 {
 	return NULL;
 }
-static inline void *tun_ptr_to_xdp(void *ptr)
+
+static inline struct xdp_frame *tun_ptr_to_xdp(void *ptr)
 {
 	return NULL;
 }
+
 static inline void tun_ptr_free(void *ptr)
 {
 }