On Thu, Nov 28, 2013 at 01:01:42PM -0800, Eric Dumazet wrote:
> On Thu, 2013-11-28 at 20:22 +0100, Hannes Frederic Sowa wrote:
> > This fixes more incorrect uses of *_STATS_BH in process context.
> >
> > Cc: Eric Dumazet <[email protected]>
> > Signed-off-by: Hannes Frederic Sowa <[email protected]>
> > ---
> > net/ipv4/udp.c | 8 ++++----
> > net/ipv6/ip6_output.c | 8 ++++----
> > net/ipv6/ping.c | 4 ++--
> > 3 files changed, 10 insertions(+), 10 deletions(-)
> >
> > diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
> > index 44e3884..f5cc018 100644
> > --- a/net/ipv4/udp.c
> > +++ b/net/ipv4/udp.c
> > @@ -1160,10 +1160,10 @@ static unsigned int first_packet_length(struct sock
> > *sk)
> > spin_lock_bh(&rcvq->lock);
>
> Here we block BH, because of spin_lock_bh()
>
> > while ((skb = skb_peek(rcvq)) != NULL &&
> > udp_lib_checksum_complete(skb)) {
> > - UDP_INC_STATS_BH(sock_net(sk), UDP_MIB_CSUMERRORS,
> > - IS_UDPLITE(sk));
> > - UDP_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS,
> > - IS_UDPLITE(sk));
>
> So this is the right thing, this change is not needed.
Oh yes, I was mechanically going through the a grep of _BH\( in ipv4
and ipv6 and missed that.
> > + UDP_INC_STATS_USER(sock_net(sk), UDP_MIB_CSUMERRORS,
> > + IS_UDPLITE(sk));
> > + UDP_INC_STATS_USER(sock_net(sk), UDP_MIB_INERRORS,
> > + IS_UDPLITE(sk));
> > atomic_inc(&sk->sk_drops);
> > __skb_unlink(skb, rcvq);
> > __skb_queue_tail(&list_kill, skb);
> > diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
> > index 59df872..e05cf0a 100644
> > --- a/net/ipv6/ip6_output.c
> > +++ b/j
> > @@ -116,8 +116,8 @@ static int ip6_finish_output2(struct sk_buff *skb)
> > }
> > rcu_read_unlock_bh();
> >
> > - IP6_INC_STATS_BH(dev_net(dst->dev),
> > - ip6_dst_idev(dst), IPSTATS_MIB_OUTNOROUTES);
> > + IP6_INC_STATS(dev_net(dst->dev),
> > + ip6_dst_idev(dst), IPSTATS_MIB_OUTNOROUTES);
>
> This is ipv6, not inet changes ;)
I always considered inet both for ipv4+ipv6, otherwise I would use ipv4
or ipv6 as patch prefix.
>
> > kfree_skb(skb);
> > return -EINVAL;
> > }
> > @@ -1524,8 +1524,8 @@ int ip6_push_pending_frames(struct sock *sk)
> > if (proto == IPPROTO_ICMPV6) {
> > struct inet6_dev *idev = ip6_dst_idev(skb_dst(skb));
> >
> > - ICMP6MSGOUT_INC_STATS_BH(net, idev, icmp6_hdr(skb)->icmp6_type);
> > - ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS);
> > + ICMP6MSGOUT_INC_STATS(net, idev, icmp6_hdr(skb)->icmp6_type);
> > + ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
>
> I am not sure we use a seqlock for ICMP stats.
>
> seqlocks were used for 64bit IP stats
True, atomic longs get used here in both cases.
Will update the patch. Thanks, Eric!
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