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[TCP]: Add tcp_dec_pcount_approx int variant

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Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ilpo Järvinen 2007-06-15 12:58:38 +03:00 committed by David S. Miller
parent bdf1ee5d3b
commit af610b4ca1
2 changed files with 11 additions and 12 deletions
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11
include/net/tcp.h
View file

@ -599,16 +599,21 @@ static inline int tcp_skb_mss(const struct sk_buff *skb)
return skb_shinfo(skb)->gso_size;
}
static inline void tcp_dec_pcount_approx(__u32 *count,
const struct sk_buff *skb)
static inline void tcp_dec_pcount_approx_int(__u32 *count, const int decr)
{
if (*count) {
*count -= tcp_skb_pcount(skb);
*count -= decr;
if ((int)*count < 0)
*count = 0;
}
}
static inline void tcp_dec_pcount_approx(__u32 *count,
const struct sk_buff *skb)
{
tcp_dec_pcount_approx_int(count, tcp_skb_pcount(skb));
}
static inline void tcp_packets_out_inc(struct sock *sk,
const struct sk_buff *skb)
{

12
net/ipv4/tcp_output.c
View file

@ -740,22 +740,16 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
if (diff > 0) {
/* Adjust Reno SACK estimate. */
if (!tp->rx_opt.sack_ok) {
tp->sacked_out -= diff;
if ((int)tp->sacked_out < 0)
tp->sacked_out = 0;
tcp_dec_pcount_approx_int(&tp->sacked_out, diff);
tcp_sync_left_out(tp);
}
tp->fackets_out -= diff;
if ((int)tp->fackets_out < 0)
tp->fackets_out = 0;
tcp_dec_pcount_approx_int(&tp->fackets_out, diff);
/* SACK fastpath might overwrite it unless dealt with */
if (tp->fastpath_skb_hint != NULL &&
after(TCP_SKB_CB(tp->fastpath_skb_hint)->seq,
TCP_SKB_CB(skb)->seq)) {
tp->fastpath_cnt_hint -= diff;
if ((int)tp->fastpath_cnt_hint < 0)
tp->fastpath_cnt_hint = 0;
tcp_dec_pcount_approx_int(&tp->fastpath_cnt_hint, diff);
}
}
}