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authorIlpo Järvinen <ilpo.jarvinen@helsinki.fi>2007-08-09 15:33:18 +0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-11 03:47:55 +0400
commitb5860bbac7be1381626f3dc8a0cb970a60fcefb4 (patch)
tree53034429084f92fdb55c062498e1f4255be9bd4a /net
parent35e8694198ba94b62df8aa35fa6e52a1cfb86df2 (diff)
downloadlinux-b5860bbac7be1381626f3dc8a0cb970a60fcefb4.tar.xz
[TCP]: Tighten tcp_sock's belt, drop left_out
It is easily calculable when needed and user are not that many after all. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/tcp_input.c11
-rw-r--r--net/ipv4/tcp_minisocks.c1
-rw-r--r--net/ipv4/tcp_output.c12
3 files changed, 5 insertions, 19 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index ea690afa592a..957e0fb8afb7 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1346,8 +1346,6 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
}
}
- tp->left_out = tp->sacked_out + tp->lost_out;
-
if ((reord < tp->fackets_out) && icsk->icsk_ca_state != TCP_CA_Loss &&
(!tp->frto_highmark || after(tp->snd_una, tp->frto_highmark)))
tcp_update_reordering(sk, ((tp->fackets_out + 1) - reord), 0);
@@ -1408,7 +1406,6 @@ static void tcp_remove_reno_sacks(struct sock *sk, int acked)
static inline void tcp_reset_reno_sack(struct tcp_sock *tp)
{
tp->sacked_out = 0;
- tp->left_out = tp->lost_out;
}
int tcp_use_frto(struct sock *sk)
@@ -1573,7 +1570,6 @@ static void tcp_enter_frto_loss(struct sock *sk, int allowed_segments, int flag)
void tcp_clear_retrans(struct tcp_sock *tp)
{
- tp->left_out = 0;
tp->retrans_out = 0;
tp->fackets_out = 0;
@@ -1973,7 +1969,7 @@ static void DBGUNDO(struct sock *sk, const char *msg)
printk(KERN_DEBUG "Undo %s %u.%u.%u.%u/%u c%u l%u ss%u/%u p%u\n",
msg,
NIPQUAD(inet->daddr), ntohs(inet->dport),
- tp->snd_cwnd, tp->left_out,
+ tp->snd_cwnd, tp->sacked_out + tp->lost_out,
tp->snd_ssthresh, tp->prior_ssthresh,
tp->packets_out);
}
@@ -2102,7 +2098,6 @@ static int tcp_try_undo_loss(struct sock *sk)
DBGUNDO(sk, "partial loss");
tp->lost_out = 0;
- tp->left_out = tp->sacked_out;
tcp_undo_cwr(sk, 1);
NET_INC_STATS_BH(LINUX_MIB_TCPLOSSUNDO);
inet_csk(sk)->icsk_retransmits = 0;
@@ -2126,8 +2121,6 @@ static void tcp_try_to_open(struct sock *sk, int flag)
{
struct tcp_sock *tp = tcp_sk(sk);
- tcp_sync_left_out(tp);
-
if (tp->retrans_out == 0)
tp->retrans_stamp = 0;
@@ -2137,7 +2130,7 @@ static void tcp_try_to_open(struct sock *sk, int flag)
if (inet_csk(sk)->icsk_ca_state != TCP_CA_CWR) {
int state = TCP_CA_Open;
- if (tp->left_out || tp->retrans_out || tp->undo_marker)
+ if (tp->sacked_out || tp->retrans_out || tp->undo_marker)
state = TCP_CA_Disorder;
if (inet_csk(sk)->icsk_ca_state != state) {
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index 36a8fbd0e64e..fdfe89fe646b 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -405,7 +405,6 @@ struct sock *tcp_create_openreq_child(struct sock *sk, struct request_sock *req,
newicsk->icsk_rto = TCP_TIMEOUT_INIT;
newtp->packets_out = 0;
- newtp->left_out = 0;
newtp->retrans_out = 0;
newtp->sacked_out = 0;
newtp->fackets_out = 0;
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 3c8c8e7f6f6d..7434944caa8f 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -732,10 +732,8 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
if (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_RETRANS)
tp->retrans_out -= diff;
- if (TCP_SKB_CB(skb)->sacked & TCPCB_LOST) {
+ if (TCP_SKB_CB(skb)->sacked & TCPCB_LOST)
tp->lost_out -= diff;
- tp->left_out -= diff;
- }
if (diff > 0) {
/* Adjust Reno SACK estimate. */
@@ -1727,15 +1725,11 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *skb, int m
TCP_SKB_CB(skb)->sacked |= TCP_SKB_CB(next_skb)->sacked&(TCPCB_EVER_RETRANS|TCPCB_AT_TAIL);
if (TCP_SKB_CB(next_skb)->sacked&TCPCB_SACKED_RETRANS)
tp->retrans_out -= tcp_skb_pcount(next_skb);
- if (TCP_SKB_CB(next_skb)->sacked&TCPCB_LOST) {
+ if (TCP_SKB_CB(next_skb)->sacked&TCPCB_LOST)
tp->lost_out -= tcp_skb_pcount(next_skb);
- tp->left_out -= tcp_skb_pcount(next_skb);
- }
/* Reno case is special. Sigh... */
- if (!tp->rx_opt.sack_ok && tp->sacked_out) {
+ if (!tp->rx_opt.sack_ok && tp->sacked_out)
tcp_dec_pcount_approx(&tp->sacked_out, next_skb);
- tp->left_out -= tcp_skb_pcount(next_skb);
- }
/* Not quite right: it can be > snd.fack, but
* it is better to underestimate fackets.