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authorIlpo Järvinen <ilpo.jarvinen@helsinki.fi>2009-02-28 05:44:38 +0100
committerDavid S. Miller <davem@davemloft.net>2009-03-02 12:00:16 +0100
commitcabeccbd172cc305f4383f5a4808ae254745275f (patch)
tree0504d469ae4fc1a6c1ba368b3cc99ae7f55520cb /net/ipv4/tcp_input.c
parenttcp: add helper for AI algorithm (diff)
downloadlinux-cabeccbd172cc305f4383f5a4808ae254745275f.tar.xz
linux-cabeccbd172cc305f4383f5a4808ae254745275f.zip
tcp: kill eff_sacks "cache", the sole user can calculate itself
Also fixes insignificant bug that would cause sending of stale SACK block (would occur in some corner cases). Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_input.c')
-rw-r--r--net/ipv4/tcp_input.c15
1 files changed, 2 insertions, 13 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 03f5ede87224..e4442a293eb0 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -4099,7 +4099,6 @@ static void tcp_dsack_set(struct sock *sk, u32 seq, u32 end_seq)
tp->rx_opt.dsack = 1;
tp->duplicate_sack[0].start_seq = seq;
tp->duplicate_sack[0].end_seq = end_seq;
- tp->rx_opt.eff_sacks = tp->rx_opt.num_sacks + 1;
}
}
@@ -4154,8 +4153,6 @@ static void tcp_sack_maybe_coalesce(struct tcp_sock *tp)
* Decrease num_sacks.
*/
tp->rx_opt.num_sacks--;
- tp->rx_opt.eff_sacks = tp->rx_opt.num_sacks +
- tp->rx_opt.dsack;
for (i = this_sack; i < tp->rx_opt.num_sacks; i++)
sp[i] = sp[i + 1];
continue;
@@ -4218,7 +4215,6 @@ new_sack:
sp->start_seq = seq;
sp->end_seq = end_seq;
tp->rx_opt.num_sacks++;
- tp->rx_opt.eff_sacks = tp->rx_opt.num_sacks + tp->rx_opt.dsack;
}
/* RCV.NXT advances, some SACKs should be eaten. */
@@ -4232,7 +4228,6 @@ static void tcp_sack_remove(struct tcp_sock *tp)
/* Empty ofo queue, hence, all the SACKs are eaten. Clear. */
if (skb_queue_empty(&tp->out_of_order_queue)) {
tp->rx_opt.num_sacks = 0;
- tp->rx_opt.eff_sacks = tp->rx_opt.dsack;
return;
}
@@ -4253,11 +4248,8 @@ static void tcp_sack_remove(struct tcp_sock *tp)
this_sack++;
sp++;
}
- if (num_sacks != tp->rx_opt.num_sacks) {
+ if (num_sacks != tp->rx_opt.num_sacks)
tp->rx_opt.num_sacks = num_sacks;
- tp->rx_opt.eff_sacks = tp->rx_opt.num_sacks +
- tp->rx_opt.dsack;
- }
}
/* This one checks to see if we can put data from the
@@ -4333,10 +4325,8 @@ static void tcp_data_queue(struct sock *sk, struct sk_buff *skb)
TCP_ECN_accept_cwr(tp, skb);
- if (tp->rx_opt.dsack) {
+ if (tp->rx_opt.dsack)
tp->rx_opt.dsack = 0;
- tp->rx_opt.eff_sacks = tp->rx_opt.num_sacks;
- }
/* Queue data for delivery to the user.
* Packets in sequence go to the receive queue.
@@ -4456,7 +4446,6 @@ drop:
if (tcp_is_sack(tp)) {
tp->rx_opt.num_sacks = 1;
tp->rx_opt.dsack = 0;
- tp->rx_opt.eff_sacks = 1;
tp->selective_acks[0].start_seq = TCP_SKB_CB(skb)->seq;
tp->selective_acks[0].end_seq =
TCP_SKB_CB(skb)->end_seq;