net: Add skb_unclone() helper function.

[~andy/linux] / net / ipv4 / tcp_output.c

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 5d451593ef16f98c65379da619b08e3d47236bff..fd0cea114b5d0d08e785bb65a67e5f904bd95df3 100644 (file)
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -314,7 +314,7 @@ static inline void TCP_ECN_send_syn(struct sock *sk, struct sk_buff *skb)
        struct tcp_sock *tp = tcp_sk(sk);
 
        tp->ecn_flags = 0;
-       if (sysctl_tcp_ecn == 1) {
+       if (sock_net(sk)->ipv4.sysctl_tcp_ecn == 1) {
                TCP_SKB_CB(skb)->tcp_flags |= TCPHDR_ECE | TCPHDR_CWR;
                tp->ecn_flags = TCP_ECN_OK;
        }
@@ -622,7 +622,7 @@ static unsigned int tcp_syn_options(struct sock *sk, struct sk_buff *skb,
 
        if (likely(sysctl_tcp_timestamps && *md5 == NULL)) {
                opts->options |= OPTION_TS;
-               opts->tsval = TCP_SKB_CB(skb)->when;
+               opts->tsval = TCP_SKB_CB(skb)->when + tp->tsoffset;
                opts->tsecr = tp->rx_opt.ts_recent;
                remaining -= TCPOLEN_TSTAMP_ALIGNED;
        }
@@ -806,7 +806,7 @@ static unsigned int tcp_established_options(struct sock *sk, struct sk_buff *skb
 
        if (likely(tp->rx_opt.tstamp_ok)) {
                opts->options |= OPTION_TS;
-               opts->tsval = tcb ? tcb->when : 0;
+               opts->tsval = tcb ? tcb->when + tp->tsoffset : 0;
                opts->tsecr = tp->rx_opt.ts_recent;
                size += TCPOLEN_TSTAMP_ALIGNED;
        }
@@ -1331,7 +1331,7 @@ static void __pskb_trim_head(struct sk_buff *skb, int len)
 /* Remove acked data from a packet in the transmit queue. */
 int tcp_trim_head(struct sock *sk, struct sk_buff *skb, u32 len)
 {
-       if (skb_cloned(skb) && pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
+       if (skb_unclone(skb, GFP_ATOMIC))
                return -ENOMEM;
 
        __pskb_trim_head(skb, len);