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-rw-r--r--include/linux/tcp.h5
-rw-r--r--include/uapi/linux/rtnetlink.h18
2 files changed, 16 insertions, 7 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index e15452df9804..04a0e647ef74 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -576,4 +576,9 @@ void tcp_sock_set_quickack(struct sock *sk, int val);
int tcp_sock_set_syncnt(struct sock *sk, int val);
int tcp_sock_set_user_timeout(struct sock *sk, int val);
+static inline bool dst_tcp_usec_ts(const struct dst_entry *dst)
+{
+ return dst_feature(dst, RTAX_FEATURE_TCP_USEC_TS);
+}
+
#endif /* _LINUX_TCP_H */
diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h
index 51c13cf9c5ae..aa2482a0614a 100644
--- a/include/uapi/linux/rtnetlink.h
+++ b/include/uapi/linux/rtnetlink.h
@@ -502,13 +502,17 @@ enum {
#define RTAX_MAX (__RTAX_MAX - 1)
-#define RTAX_FEATURE_ECN (1 << 0)
-#define RTAX_FEATURE_SACK (1 << 1)
-#define RTAX_FEATURE_TIMESTAMP (1 << 2)
-#define RTAX_FEATURE_ALLFRAG (1 << 3)
-
-#define RTAX_FEATURE_MASK (RTAX_FEATURE_ECN | RTAX_FEATURE_SACK | \
- RTAX_FEATURE_TIMESTAMP | RTAX_FEATURE_ALLFRAG)
+#define RTAX_FEATURE_ECN (1 << 0)
+#define RTAX_FEATURE_SACK (1 << 1) /* unused */
+#define RTAX_FEATURE_TIMESTAMP (1 << 2) /* unused */
+#define RTAX_FEATURE_ALLFRAG (1 << 3)
+#define RTAX_FEATURE_TCP_USEC_TS (1 << 4)
+
+#define RTAX_FEATURE_MASK (RTAX_FEATURE_ECN | \
+ RTAX_FEATURE_SACK | \
+ RTAX_FEATURE_TIMESTAMP | \
+ RTAX_FEATURE_ALLFRAG | \
+ RTAX_FEATURE_TCP_USEC_TS)
struct rta_session {
__u8 proto;