1 files changed, 7 insertions, 0 deletions

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 5eca9060bb8e..c27e81392398 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2631,6 +2631,10 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
                 else
                         tp->tsoffset = val - tcp_time_stamp;
                 break;
+        case TCP_NOTSENT_LOWAT:
+                tp->notsent_lowat = val;
+                sk->sk_write_space(sk);
+                break;
         default:
                 err = -ENOPROTOOPT;
                 break;
@@ -2847,6 +2851,9 @@ static int do_tcp_getsockopt(struct sock *sk, int level,
         case TCP_TIMESTAMP:
                 val = tcp_time_stamp + tp->tsoffset;
                 break;
+        case TCP_NOTSENT_LOWAT:
+                val = tp->notsent_lowat;
+                break;
         default:
                 return -ENOPROTOOPT;
         }