diff options
| author |   Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> | 2007-12-31 04:50:19 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2008-01-28 15:00:23 -0800 |
| commit | 4828e7f49a402930e8b3e72de695c8d37e0f98ee (patch) | |
| tree | 021c5d357b8a081bee8b8798e362b37999ee1ffb /net | |
| parent | [TCP]: Dropped unnecessary skb/sacked accessing in reneging (diff) | |
| download | linux-dev-4828e7f49a402930e8b3e72de695c8d37e0f98ee.tar.xz linux-dev-4828e7f49a402930e8b3e72de695c8d37e0f98ee.zip | |
[TCP]: Remove TCPCB_URG & TCPCB_AT_TAIL as unnecessary
The snd_up check should be enough. I suspect this has been
there to provide a minor optimization in clean_rtx_queue which
used to have a small if (!->sacked) block which could skip
snd_up check among the other work.
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.c | 1 | ||||
| -rw-r--r-- | net/ipv4/tcp_input.c | 3 | ||||
| -rw-r--r-- | net/ipv4/tcp_output.c | 7 |
3 files changed, 4 insertions, 7 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 2cbfa6df7976..34085e3a4096 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -497,7 +497,6 @@ static inline void tcp_mark_urg(struct tcp_sock *tp, int flags, if (flags & MSG_OOB) { tp->urg_mode = 1; tp->snd_up = tp->write_seq; - TCP_SKB_CB(skb)->sacked |= TCPCB_URG; } } diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 7bac1fac065f..1e7fd8113663 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -2821,8 +2821,7 @@ static int tcp_clean_rtx_queue(struct sock *sk, int prior_fackets) if (sacked & TCPCB_LOST) tp->lost_out -= acked_pcount; - if (unlikely((sacked & TCPCB_URG) && tp->urg_mode && - !before(end_seq, tp->snd_up))) + if (unlikely(tp->urg_mode && !before(end_seq, tp->snd_up))) tp->urg_mode = 0; tp->packets_out -= acked_pcount; diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index 821fae271428..cd21528665f3 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -711,7 +711,6 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss TCP_SKB_CB(skb)->flags = flags & ~(TCPCB_FLAG_FIN|TCPCB_FLAG_PSH); TCP_SKB_CB(buff)->flags = flags; 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_PARTIAL) { /* Copy and checksum data tail into the new buffer. */ @@ -1726,7 +1725,7 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *skb, int m /* All done, get rid of second SKB and account for it so * packet counting does not break. */ - TCP_SKB_CB(skb)->sacked |= TCP_SKB_CB(next_skb)->sacked&(TCPCB_EVER_RETRANS|TCPCB_AT_TAIL); + TCP_SKB_CB(skb)->sacked |= TCP_SKB_CB(next_skb)->sacked & TCPCB_EVER_RETRANS; 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) @@ -2475,7 +2474,7 @@ static int tcp_xmit_probe_skb(struct sock *sk, int urgent) skb_reserve(skb, MAX_TCP_HEADER); skb->csum = 0; TCP_SKB_CB(skb)->flags = TCPCB_FLAG_ACK; - TCP_SKB_CB(skb)->sacked = urgent; + TCP_SKB_CB(skb)->sacked = 0; skb_shinfo(skb)->gso_segs = 1; skb_shinfo(skb)->gso_size = 0; skb_shinfo(skb)->gso_type = 0; @@ -2527,7 +2526,7 @@ int tcp_write_wakeup(struct sock *sk) } else { if (tp->urg_mode && between(tp->snd_up, tp->snd_una+1, tp->snd_una+0xFFFF)) - tcp_xmit_probe_skb(sk, TCPCB_URG); + tcp_xmit_probe_skb(sk, 1); return tcp_xmit_probe_skb(sk, 0); } } |