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| author |   Eric Dumazet <edumazet@google.com> | 2019-10-16 18:00:56 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-10-18 10:02:37 -0700 |
| commit | 9669fffc1415bb0c30e5d2ec98a8e1c3a418cb9c (patch) | |
| tree | 3abe73fdf43b7a670cc69b6930d07c2683ade0d4 /net/bridge | |
| parent | Merge branch 'net-bcmgenet-restore-internal-EPHY-support' (diff) | |
| download | linux-dev-9669fffc1415bb0c30e5d2ec98a8e1c3a418cb9c.tar.xz linux-dev-9669fffc1415bb0c30e5d2ec98a8e1c3a418cb9c.zip | |
net: ensure correct skb->tstamp in various fragmenters
Thomas found that some forwarded packets would be stuck
in FQ packet scheduler because their skb->tstamp contained
timestamps far in the future.
We thought we addressed this point in commit 8203e2d844d3
("net: clear skb->tstamp in forwarding paths") but there
is still an issue when/if a packet needs to be fragmented.
In order to meet EDT requirements, we have to make sure all
fragments get the original skb->tstamp.
Note that this original skb->tstamp should be zero in
forwarding path, but might have a non zero value in
output path if user decided so.
Fixes: fb420d5d91c1 ("tcp/fq: move back to CLOCK_MONOTONIC")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Thomas Bartschies <Thomas.Bartschies@cvk.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge')
| -rw-r--r-- | net/bridge/netfilter/nf_conntrack_bridge.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/bridge/netfilter/nf_conntrack_bridge.c b/net/bridge/netfilter/nf_conntrack_bridge.c index 8842798c29e6..506d6141e44e 100644 --- a/net/bridge/netfilter/nf_conntrack_bridge.c +++ b/net/bridge/netfilter/nf_conntrack_bridge.c @@ -33,6 +33,7 @@ static int nf_br_ip_fragment(struct net *net, struct sock *sk, { int frag_max_size = BR_INPUT_SKB_CB(skb)->frag_max_size; unsigned int hlen, ll_rs, mtu; + ktime_t tstamp = skb->tstamp; struct ip_frag_state state; struct iphdr *iph; int err; @@ -80,6 +81,7 @@ static int nf_br_ip_fragment(struct net *net, struct sock *sk, if (iter.frag) ip_fraglist_prepare(skb, &iter); + skb->tstamp = tstamp; err = output(net, sk, data, skb); if (err || !iter.frag) break; @@ -104,6 +106,7 @@ slow_path: goto blackhole; } + skb2->tstamp = tstamp; err = output(net, sk, data, skb2); if (err) goto blackhole; |