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Diffstat (limited to 'net/ipv4/tcp_output.c')
-rw-r--r--net/ipv4/tcp_output.c22
1 files changed, 10 insertions, 12 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 85b07eba1879..fe3b4bdfd251 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -722,8 +722,7 @@ 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_can_gso(sk) ||
- tcp_urg_mode(tcp_sk(sk))) {
+ if (skb->len <= mss_now || !sk_can_gso(sk)) {
/* Avoid the costly divide in the normal
* non-TSO case.
*/
@@ -1029,10 +1028,6 @@ unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu)
/* Compute the current effective MSS, taking SACKs and IP options,
* and even PMTU discovery events into account.
- *
- * LARGESEND note: !tcp_urg_mode is overkill, only frames up to snd_up
- * cannot be large. However, taking into account rare use of URG, this
- * is not a big flaw.
*/
unsigned int tcp_current_mss(struct sock *sk, int large_allowed)
{
@@ -1047,7 +1042,7 @@ unsigned int tcp_current_mss(struct sock *sk, int large_allowed)
mss_now = tp->mss_cache;
- if (large_allowed && sk_can_gso(sk) && !tcp_urg_mode(tp))
+ if (large_allowed && sk_can_gso(sk))
doing_tso = 1;
if (dst) {
@@ -1164,9 +1159,7 @@ static int tcp_init_tso_segs(struct sock *sk, struct sk_buff *skb,
{
int tso_segs = tcp_skb_pcount(skb);
- if (!tso_segs ||
- (tso_segs > 1 && (tcp_skb_mss(skb) != mss_now ||
- tcp_urg_mode(tcp_sk(sk))))) {
+ if (!tso_segs || (tso_segs > 1 && tcp_skb_mss(skb) != mss_now)) {
tcp_set_skb_tso_segs(sk, skb, mss_now);
tso_segs = tcp_skb_pcount(skb);
}
@@ -1519,6 +1512,10 @@ static int tcp_mtu_probe(struct sock *sk)
* send_head. This happens as incoming acks open up the remote
* window for us.
*
+ * LARGESEND note: !tcp_urg_mode is overkill, only frames between
+ * snd_up-64k-mss .. snd_up cannot be large. However, taking into
+ * account rare use of URG, this is not a big flaw.
+ *
* Returns 1, if no segments are in flight and we have queued segments, but
* cannot send anything now because of SWS or another problem.
*/
@@ -1570,7 +1567,7 @@ static int tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle)
}
limit = mss_now;
- if (tso_segs > 1)
+ if (tso_segs > 1 && !tcp_urg_mode(tp))
limit = tcp_mss_split_point(sk, skb, mss_now,
cwnd_quota);
@@ -1619,6 +1616,7 @@ void __tcp_push_pending_frames(struct sock *sk, unsigned int cur_mss,
*/
void tcp_push_one(struct sock *sk, unsigned int mss_now)
{
+ struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *skb = tcp_send_head(sk);
unsigned int tso_segs, cwnd_quota;
@@ -1633,7 +1631,7 @@ void tcp_push_one(struct sock *sk, unsigned int mss_now)
BUG_ON(!tso_segs);
limit = mss_now;
- if (tso_segs > 1)
+ if (tso_segs > 1 && !tcp_urg_mode(tp))
limit = tcp_mss_split_point(sk, skb, mss_now,
cwnd_quota);