1 files changed, 18 insertions, 0 deletions

diff --git a/net/ipv4/tcp_offload.c b/net/ipv4/tcp_offload.c
index 55046ecd083e..f597119fc4e7 100644
--- a/net/ipv4/tcp_offload.c
+++ b/net/ipv4/tcp_offload.c
@@ -14,6 +14,21 @@
 #include <net/tcp.h>
 #include <net/protocol.h>
 
+void tcp_gso_tstamp(struct sk_buff *skb, unsigned int ts_seq, unsigned int seq,
+                    unsigned int mss)
+{
+        while (skb) {
+                if (ts_seq < (__u64) seq + mss) {
+                        skb_shinfo(skb)->tx_flags = SKBTX_SW_TSTAMP;
+                        skb_shinfo(skb)->tskey = ts_seq;
+                        return;
+                }
+
+                skb = skb->next;
+                seq += mss;
+        }
+}
+
 struct sk_buff *tcp_gso_segment(struct sk_buff *skb,
                                 netdev_features_t features)
 {
@@ -91,6 +106,9 @@ struct sk_buff *tcp_gso_segment(struct sk_buff *skb,
         th = tcp_hdr(skb);
         seq = ntohl(th->seq);
 
+        if (unlikely(skb_shinfo(gso_skb)->tx_flags & SKBTX_SW_TSTAMP))
+                tcp_gso_tstamp(segs, skb_shinfo(gso_skb)->tskey, seq, mss);
+
         newcheck = ~csum_fold((__force __wsum)((__force u32)th->check +
                                                (__force u32)delta));