1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index f2bb2396853f..542d39596bd8 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -343,6 +343,12 @@ struct tcp_sock {
                 __u32   seq;
                 __u32   time;
         } rcvq_space;
+
+/* TCP-specific MTU probe information. */
+        struct {
+                __u32             probe_seq_start;
+                __u32             probe_seq_end;
+        } mtu_probe;
 };
 
 static inline struct tcp_sock *tcp_sk(const struct sock *sk)