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[TCP]: Add return value indication to tcp_prune_ofo_queue(). 

Returns non-zero if tp->out_of_order_queue was seen non-empty.
This allows tcp_try_rmem_schedule() to return early.

Signed-off-by: Vitaliy Gusev <vgusev@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vitaliy Gusev 2008-04-15 20:26:34 -07:00 committed by David S. Miller
parent c4cbb34bbd
commit 56f367bbfd
1 changed files with 9 additions and 3 deletions
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12
net/ipv4/tcp_input.c
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@ -3841,7 +3841,7 @@ static void tcp_ofo_queue(struct sock *sk)
}
}
static void tcp_prune_ofo_queue(struct sock *sk);
static int tcp_prune_ofo_queue(struct sock *sk);
static int tcp_prune_queue(struct sock *sk);
static inline int tcp_try_rmem_schedule(struct sock *sk, unsigned int size)
@ -3853,7 +3853,9 @@ static inline int tcp_try_rmem_schedule(struct sock *sk, unsigned int size)
return -1;
if (!sk_rmem_schedule(sk, size)) {
tcp_prune_ofo_queue(sk);
if (!tcp_prune_ofo_queue(sk))
return -1;
if (!sk_rmem_schedule(sk, size))
return -1;
}
@ -4211,10 +4213,12 @@ static void tcp_collapse_ofo_queue(struct sock *sk)
/*
* Purge the out-of-order queue.
* Return true if queue was pruned.
*/
static void tcp_prune_ofo_queue(struct sock *sk)
static int tcp_prune_ofo_queue(struct sock *sk)
{
struct tcp_sock *tp = tcp_sk(sk);
int res = 0;
if (!skb_queue_empty(&tp->out_of_order_queue)) {
NET_INC_STATS_BH(LINUX_MIB_OFOPRUNED);
@ -4228,7 +4232,9 @@ static void tcp_prune_ofo_queue(struct sock *sk)
if (tp->rx_opt.sack_ok)
tcp_sack_reset(&tp->rx_opt);
sk_mem_reclaim(sk);
res = 1;
}
return res;
}
/* Reduce allocated memory if we can, trying to get