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Commit 56f367bb authored by Vitaliy Gusev's avatar Vitaliy Gusev Committed by David S. Miller
Browse files

[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: default avatarVitaliy Gusev <vgusev@openvz.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c4cbb34b

net/ipv4/tcp_input.c

+9 −3
Original line number Diff line number Diff line
@@ -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