diff mbox

a problem tcp_v4_err()

Message ID 20101112.112224.112610807.davem@davemloft.net
State Superseded, archived
Delegated to: David Miller
Headers show

Commit Message

David Miller Nov. 12, 2010, 7:22 p.m. UTC 
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Fri, 12 Nov 2010 19:33:23 +0100

> I CC Damian Lukowski in my previous answer (and this one too)

Probably the safest fix is this:

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Comments

Eric Dumazet Nov. 12, 2010, 9:18 p.m. UTC | #1 
Le vendredi 12 novembre 2010 à 11:22 -0800, David Miller a écrit :
> From: Eric Dumazet <eric.dumazet@gmail.com>
> Date: Fri, 12 Nov 2010 19:33:23 +0100
> 
> > I CC Damian Lukowski in my previous answer (and this one too)
> 
> Probably the safest fix is this:
> 
> diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
> index 8f8527d..69ccbc1 100644
> --- a/net/ipv4/tcp_ipv4.c
> +++ b/net/ipv4/tcp_ipv4.c
> @@ -415,6 +415,9 @@ void tcp_v4_err(struct sk_buff *icmp_skb, u32 info)
>  		    !icsk->icsk_backoff)
>  			break;
>  
> +		if (sock_owned_by_user(sk))
> +			break;
> +
>  		icsk->icsk_backoff--;
>  		inet_csk(sk)->icsk_rto = __tcp_set_rto(tp) <<
>  					 icsk->icsk_backoff;
> @@ -429,11 +432,6 @@ void tcp_v4_err(struct sk_buff *icmp_skb, u32 info)
>  		if (remaining) {
>  			inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
>  						  remaining, TCP_RTO_MAX);
> -		} else if (sock_owned_by_user(sk)) {
> -			/* RTO revert clocked out retransmission,
> -			 * but socket is locked. Will defer. */
> -			inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
> -						  HZ/20, TCP_RTO_MAX);
>  		} else {
>  			/* RTO revert clocked out retransmission.
>  			 * Will retransmit now */


Acked-by: Eric Dumazet <eric.dumazet@gmail.com>



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diff mbox

Patch

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 8f8527d..69ccbc1 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -415,6 +415,9 @@  void tcp_v4_err(struct sk_buff *icmp_skb, u32 info)
 		    !icsk->icsk_backoff)
 			break;
 
+		if (sock_owned_by_user(sk))
+			break;
+
 		icsk->icsk_backoff--;
 		inet_csk(sk)->icsk_rto = __tcp_set_rto(tp) <<
 					 icsk->icsk_backoff;
@@ -429,11 +432,6 @@  void tcp_v4_err(struct sk_buff *icmp_skb, u32 info)
 		if (remaining) {
 			inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
 						  remaining, TCP_RTO_MAX);
-		} else if (sock_owned_by_user(sk)) {
-			/* RTO revert clocked out retransmission,
-			 * but socket is locked. Will defer. */
-			inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
-						  HZ/20, TCP_RTO_MAX);
 		} else {
 			/* RTO revert clocked out retransmission.
 			 * Will retransmit now */