1 files changed, 33 insertions, 33 deletions

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index bdd71db8bf90..9a253faefc81 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -43,24 +43,24 @@
 #include <linux/smp_lock.h>
 
 /* People can turn this off for buggy TCP's found in printers etc. */
-int sysctl_tcp_retrans_collapse = 1;
+int sysctl_tcp_retrans_collapse __read_mostly = 1;
 
 /* People can turn this on to  work with those rare, broken TCPs that
  * interpret the window field as a signed quantity.
  */
-int sysctl_tcp_workaround_signed_windows = 0;
+int sysctl_tcp_workaround_signed_windows __read_mostly = 0;
 
 /* This limits the percentage of the congestion window which we
  * will allow a single TSO frame to consume.  Building TSO frames
  * which are too large can cause TCP streams to be bursty.
  */
-int sysctl_tcp_tso_win_divisor = 3;
+int sysctl_tcp_tso_win_divisor __read_mostly = 3;
 
-int sysctl_tcp_mtu_probing = 0;
-int sysctl_tcp_base_mss = 512;
+int sysctl_tcp_mtu_probing __read_mostly = 0;
+int sysctl_tcp_base_mss __read_mostly = 512;
 
 /* By default, RFC2861 behavior.  */
-int sysctl_tcp_slow_start_after_idle = 1;
+int sysctl_tcp_slow_start_after_idle __read_mostly = 1;
 
 static void update_send_head(struct sock *sk, struct tcp_sock *tp,
                              struct sk_buff *skb)
@@ -201,6 +201,7 @@ void tcp_select_initial_window(int __space, __u32 mss,
                  * See RFC1323 for an explanation of the limit to 14 
                  */
                 space = max_t(u32, sysctl_tcp_rmem[2], sysctl_rmem_max);
+                space = min_t(u32, space, *window_clamp);
                 while (space > 65535 && (*rcv_wscale) < 14) {
                         space >>= 1;
                         (*rcv_wscale)++;
@@ -268,7 +269,7 @@ static u16 tcp_select_window(struct sock *sk)
         return new_win;
 }
 
-static void tcp_build_and_update_options(__u32 *ptr, struct tcp_sock *tp,
+static void tcp_build_and_update_options(__be32 *ptr, struct tcp_sock *tp,
                                          __u32 tstamp)
 {
         if (tp->rx_opt.tstamp_ok) {
@@ -304,7 +305,7 @@ static void tcp_build_and_update_options(__u32 *ptr, struct tcp_sock *tp,
  * MAX_SYN_SIZE to match the new maximum number of options that you
  * can generate.
  */
-static void tcp_syn_build_options(__u32 *ptr, int mss, int ts, int sack,
+static void tcp_syn_build_options(__be32 *ptr, int mss, int ts, int sack,
                                   int offer_wscale, int wscale, __u32 tstamp,
                                   __u32 ts_recent)
 {
@@ -423,7 +424,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it,
         th->dest                = inet->dport;
         th->seq                 = htonl(tcb->seq);
         th->ack_seq             = htonl(tp->rcv_nxt);
-        *(((__u16 *)th) + 6)    = htons(((tcp_header_size >> 2) << 12) |
+        *(((__be16 *)th) + 6)   = htons(((tcp_header_size >> 2) << 12) |
                                         tcb->flags);
 
         if (unlikely(tcb->flags & TCPCB_FLAG_SYN)) {
@@ -444,7 +445,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it,
         }
 
         if (unlikely(tcb->flags & TCPCB_FLAG_SYN)) {
-                tcp_syn_build_options((__u32 *)(th + 1),
+                tcp_syn_build_options((__be32 *)(th + 1),
                                       tcp_advertise_mss(sk),
                                       (sysctl_flags & SYSCTL_FLAG_TSTAMPS),
                                       (sysctl_flags & SYSCTL_FLAG_SACK),
@@ -453,7 +454,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it,
                                       tcb->when,
                                       tp->rx_opt.ts_recent);
         } else {
-                tcp_build_and_update_options((__u32 *)(th + 1),
+                tcp_build_and_update_options((__be32 *)(th + 1),
                                              tp, tcb->when);
                 TCP_ECN_send(sk, tp, skb, tcp_header_size);
         }
@@ -466,7 +467,8 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it,
         if (skb->len != tcp_header_size)
                 tcp_event_data_sent(tp, skb, sk);
 
-        TCP_INC_STATS(TCP_MIB_OUTSEGS);
+        if (after(tcb->end_seq, tp->snd_nxt) || tcb->seq == tcb->end_seq)
+                TCP_INC_STATS(TCP_MIB_OUTSEGS);
 
         err = icsk->icsk_af_ops->queue_xmit(skb, 0);
         if (likely(err <= 0))
@@ -510,8 +512,7 @@ static void tcp_queue_skb(struct sock *sk, struct sk_buff *skb)
 
 static void tcp_set_skb_tso_segs(struct sock *sk, struct sk_buff *skb, unsigned int mss_now)
 {
-        if (skb->len <= mss_now ||
-            !(sk->sk_route_caps & NETIF_F_TSO)) {
+        if (skb->len <= mss_now || !sk_can_gso(sk)) {
                 /* Avoid the costly divide in the normal
                  * non-TSO case.
                  */
@@ -525,7 +526,7 @@ static void tcp_set_skb_tso_segs(struct sock *sk, struct sk_buff *skb, unsigned
                 factor /= mss_now;
                 skb_shinfo(skb)->gso_segs = factor;
                 skb_shinfo(skb)->gso_size = mss_now;
-                skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
+                skb_shinfo(skb)->gso_type = sk->sk_gso_type;
         }
 }
 
@@ -576,7 +577,7 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
         TCP_SKB_CB(buff)->sacked = TCP_SKB_CB(skb)->sacked;
         TCP_SKB_CB(skb)->sacked &= ~TCPCB_AT_TAIL;
 
-        if (!skb_shinfo(skb)->nr_frags && skb->ip_summed != CHECKSUM_HW) {
+        if (!skb_shinfo(skb)->nr_frags && skb->ip_summed != CHECKSUM_PARTIAL) {
                 /* Copy and checksum data tail into the new buffer. */
                 buff->csum = csum_partial_copy_nocheck(skb->data + len, skb_put(buff, nsize),
                                                        nsize, 0);
@@ -585,7 +586,7 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
 
                 skb->csum = csum_block_sub(skb->csum, buff->csum, len);
         } else {
-                skb->ip_summed = CHECKSUM_HW;
+                skb->ip_summed = CHECKSUM_PARTIAL;
                 skb_split(skb, buff, len);
         }
 
@@ -688,7 +689,7 @@ int tcp_trim_head(struct sock *sk, struct sk_buff *skb, u32 len)
                 __pskb_trim_head(skb, len - skb_headlen(skb));
 
         TCP_SKB_CB(skb)->seq += len;
-        skb->ip_summed = CHECKSUM_HW;
+        skb->ip_summed = CHECKSUM_PARTIAL;
 
         skb->truesize        -= len;
         sk->sk_wmem_queued   -= len;
@@ -824,9 +825,7 @@ unsigned int tcp_current_mss(struct sock *sk, int large_allowed)
 
         mss_now = tp->mss_cache;
 
-        if (large_allowed &&
-            (sk->sk_route_caps & NETIF_F_TSO) &&
-            !tp->urg_mode)
+        if (large_allowed && sk_can_gso(sk) && !tp->urg_mode)
                 doing_tso = 1;
 
         if (dst) {
@@ -1063,7 +1062,7 @@ static int tso_fragment(struct sock *sk, struct sk_buff *skb, unsigned int len,
         /* This packet was never sent out yet, so no SACK bits. */
         TCP_SKB_CB(buff)->sacked = 0;
 
-        buff->ip_summed = skb->ip_summed = CHECKSUM_HW;
+        buff->ip_summed = skb->ip_summed = CHECKSUM_PARTIAL;
         skb_split(skb, buff, len);
 
         /* Fix up tso_factor for both original and new SKB.  */
@@ -1207,8 +1206,7 @@ static int tcp_mtu_probe(struct sock *sk)
         TCP_SKB_CB(nskb)->flags = TCPCB_FLAG_ACK;
         TCP_SKB_CB(nskb)->sacked = 0;
         nskb->csum = 0;
-        if (skb->ip_summed == CHECKSUM_HW)
-                nskb->ip_summed = CHECKSUM_HW;
+        nskb->ip_summed = skb->ip_summed;
 
         len = 0;
         while (len < probe_size) {
@@ -1232,7 +1230,7 @@ static int tcp_mtu_probe(struct sock *sk)
                                                    ~(TCPCB_FLAG_FIN|TCPCB_FLAG_PSH);
                         if (!skb_shinfo(skb)->nr_frags) {
                                 skb_pull(skb, copy);
-                                if (skb->ip_summed != CHECKSUM_HW)
+                                if (skb->ip_summed != CHECKSUM_PARTIAL)
                                         skb->csum = csum_partial(skb->data, skb->len, 0);
                         } else {
                                 __pskb_trim_head(skb, copy);
@@ -1573,10 +1571,9 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *skb, int m
 
                 memcpy(skb_put(skb, next_skb_size), next_skb->data, next_skb_size);
 
-                if (next_skb->ip_summed == CHECKSUM_HW)
-                        skb->ip_summed = CHECKSUM_HW;
+                skb->ip_summed = next_skb->ip_summed;
 
-                if (skb->ip_summed != CHECKSUM_HW)
+                if (skb->ip_summed != CHECKSUM_PARTIAL)
                         skb->csum = csum_block_add(skb->csum, next_skb->csum, skb_size);
 
                 /* Update sequence range on original skb. */
@@ -2044,8 +2041,6 @@ struct sk_buff * tcp_make_synack(struct sock *sk, struct dst_entry *dst,
         memset(th, 0, sizeof(struct tcphdr));
         th->syn = 1;
         th->ack = 1;
-        if (dst->dev->features&NETIF_F_TSO)
-                ireq->ecn_ok = 0;
         TCP_ECN_make_synack(req, th);
         th->source = inet_sk(sk)->sport;
         th->dest = ireq->rmt_port;
@@ -2075,7 +2070,7 @@ struct sk_buff * tcp_make_synack(struct sock *sk, struct dst_entry *dst,
         th->window = htons(req->rcv_wnd);
 
         TCP_SKB_CB(skb)->when = tcp_time_stamp;
-        tcp_syn_build_options((__u32 *)(th + 1), dst_metric(dst, RTAX_ADVMSS), ireq->tstamp_ok,
+        tcp_syn_build_options((__be32 *)(th + 1), dst_metric(dst, RTAX_ADVMSS), ireq->tstamp_ok,
                               ireq->sack_ok, ireq->wscale_ok, ireq->rcv_wscale,
                               TCP_SKB_CB(skb)->when,
                               req->ts_recent);
@@ -2162,10 +2157,9 @@ int tcp_connect(struct sock *sk)
         skb_shinfo(buff)->gso_size = 0;
         skb_shinfo(buff)->gso_type = 0;
         buff->csum = 0;
+        tp->snd_nxt = tp->write_seq;
         TCP_SKB_CB(buff)->seq = tp->write_seq++;
         TCP_SKB_CB(buff)->end_seq = tp->write_seq;
-        tp->snd_nxt = tp->write_seq;
-        tp->pushed_seq = tp->write_seq;
 
         /* Send it off. */
         TCP_SKB_CB(buff)->when = tcp_time_stamp;
@@ -2175,6 +2169,12 @@ int tcp_connect(struct sock *sk)
         sk_charge_skb(sk, buff);
         tp->packets_out += tcp_skb_pcount(buff);
         tcp_transmit_skb(sk, buff, 1, GFP_KERNEL);
+
+        /* We change tp->snd_nxt after the tcp_transmit_skb() call
+         * in order to make this packet get counted in tcpOutSegs.
+         */
+        tp->snd_nxt = tp->write_seq;
+        tp->pushed_seq = tp->write_seq;
         TCP_INC_STATS(TCP_MIB_ACTIVEOPENS);
 
         /* Timer for repeating the SYN until an answer. */