3 files changed, 4 insertions, 0 deletions

diff --git a/include/uapi/linux/snmp.h b/include/uapi/linux/snmp.h
index d02e859301ff..750d89120335 100644
--- a/include/uapi/linux/snmp.h
+++ b/include/uapi/linux/snmp.h
@@ -278,6 +278,7 @@ enum
         LINUX_MIB_TCPMTUPSUCCESS,               /* TCPMTUPSuccess */
         LINUX_MIB_TCPDELIVERED,                 /* TCPDelivered */
         LINUX_MIB_TCPDELIVEREDCE,               /* TCPDeliveredCE */
+        LINUX_MIB_TCPACKCOMPRESSED,             /* TCPAckCompressed */
         __LINUX_MIB_MAX
 };
 
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index 261b71d0ccc5..6c1ff89a60fa 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -298,6 +298,7 @@ static const struct snmp_mib snmp4_net_list[] = {
         SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
         SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED),
         SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE),
+        SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED),
         SNMP_MIB_SENTINEL
 };
 
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 7ee98aad82b7..437bb7ceba7f 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -165,6 +165,8 @@ static inline void tcp_event_ack_sent(struct sock *sk, unsigned int pkts)
         struct tcp_sock *tp = tcp_sk(sk);
 
         if (unlikely(tp->compressed_ack)) {
+                NET_ADD_STATS(sock_net(sk), LINUX_MIB_TCPACKCOMPRESSED,
+                              tp->compressed_ack);
                 tp->compressed_ack = 0;
                 if (hrtimer_try_to_cancel(&tp->compressed_ack_timer) == 1)
                         __sock_put(sk);