From: <gregkh@linuxfoundation.org>
To: edumazet@google.com, davem@davemloft.net,
gregkh@linuxfoundation.org, ycheng@google.com
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "tcp: refresh skb timestamp at retransmit time" has been added to the 4.5-stable tree
Date: Mon, 16 May 2016 11:26:42 -0700 [thread overview]
Message-ID: <146342320210244@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
tcp: refresh skb timestamp at retransmit time
to the 4.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tcp-refresh-skb-timestamp-at-retransmit-time.patch
and it can be found in the queue-4.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From foo@baz Mon May 16 11:20:33 PDT 2016
From: Eric Dumazet <edumazet@google.com>
Date: Mon, 9 May 2016 20:55:16 -0700
Subject: tcp: refresh skb timestamp at retransmit time
From: Eric Dumazet <edumazet@google.com>
[ Upstream commit 10a81980fc47e64ffac26a073139813d3f697b64 ]
In the very unlikely case __tcp_retransmit_skb() can not use the cloning
done in tcp_transmit_skb(), we need to refresh skb_mstamp before doing
the copy and transmit, otherwise TCP TS val will be an exact copy of
original transmit.
Fixes: 7faee5c0d514 ("tcp: remove TCP_SKB_CB(skb)->when")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/ipv4/tcp_output.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2625,8 +2625,10 @@ int __tcp_retransmit_skb(struct sock *sk
*/
if (unlikely((NET_IP_ALIGN && ((unsigned long)skb->data & 3)) ||
skb_headroom(skb) >= 0xFFFF)) {
- struct sk_buff *nskb = __pskb_copy(skb, MAX_TCP_HEADER,
- GFP_ATOMIC);
+ struct sk_buff *nskb;
+
+ skb_mstamp_get(&skb->skb_mstamp);
+ nskb = __pskb_copy(skb, MAX_TCP_HEADER, GFP_ATOMIC);
err = nskb ? tcp_transmit_skb(sk, nskb, 0, GFP_ATOMIC) :
-ENOBUFS;
} else {
Patches currently in stable-queue which might be from edumazet@google.com are
queue-4.5/tcp-refresh-skb-timestamp-at-retransmit-time.patch
queue-4.5/netem-segment-gso-packets-on-enqueue.patch
queue-4.5/net-mlx4_en-fix-spurious-timestamping-callbacks.patch
queue-4.5/net-sched-do-not-requeue-a-null-skb.patch
queue-4.5/soreuseport-fix-ordering-for-mixed-v4-v6-sockets.patch
reply other threads:[~2016-05-16 18:34 UTC|newest]
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