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Re: [PATCH v4 net] ipvs: fix bind to link-local mcast IPv6 address in backup

From Simon Horman <horms@verge.net.au>
Newsgroups linux.kernel
Subject Re: [PATCH v4 net] ipvs: fix bind to link-local mcast IPv6 address in backup
Date 2016-06-23 03:30 +0200
Message-ID <rN1CW-2Rr-3@gated-at.bofh.it> (permalink)
References <rKyOJ-4I9-9@gated-at.bofh.it> <rKzB7-5e9-3@gated-at.bofh.it> <rKVLj-33B-11@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Fri, Jun 17, 2016 at 09:42:49AM +0300, Julian Anastasov wrote:
> 
> 	Hello,
> 
> On Thu, 16 Jun 2016, Quentin Armitage wrote:
> 
> > When using HEAD from
> > https://git.kernel.org/cgit/utils/kernel/ipvsadm/ipvsadm.git/,
> > the command:
> > ipvsadm --start-daemon backup --mcast-interface eth0.60 \
> >     --mcast-group ff02::1:81
> > fails with the error message:
> > Argument list too long
> > 
> > whereas both:
> > ipvsadm --start-daemon master --mcast-interface eth0.60 \
> >     --mcast-group ff02::1:81
> > and:
> > ipvsadm --start-daemon backup --mcast-interface eth0.60 \
> >     --mcast-group 224.0.0.81
> > are successful.
> > 
> > The error message "Argument list too long" isn't helpful. The error occurs
> > because an IPv6 address is given in backup mode.
> > 
> > The error is in make_receive_sock() in net/netfilter/ipvs/ip_vs_sync.c,
> > since it fails to set the interface on the address or the socket before
> > calling inet6_bind() (via sock->ops->bind), where the test
> > 'if (!sk->sk_bound_dev_if)' failed.
> > 
> > Setting sock->sk->sk_bound_dev_if on the socket before calling
> > inet6_bind() resolves the issue.
> > 
> > Fixes: d33288172e72 ("ipvs: add more mcast parameters for the sync daemon")
> > Signed-off-by: Quentin Armitage <quentin@armitage.org.uk>
> 
> 	Looks good to me, thanks!
> 
> Acked-by: Julian Anastasov <ja@ssi.bg>
> 
> 	Simon, please apply to ipvs tree. Patch compiles
> also on stable 4.4.13, 4.5.7 and 4.6.2, so no need for
> special versions. The ack is also for the other 3 patches
> from v4 (for ipvs-next) but they depend on this patch.

Thanks, done.

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Thread

[PATCH v2 0/5] ipvs: fix backup sync daemon with IPv6, and minor updates Quentin Armitage <quentin@armitage.org.uk> - 2016-06-14 16:30 +0200
  [PATCH v2 2/5] ipvs: Stop calling __dev_get_by_name() repeatedly when starting sync daemon Quentin Armitage <quentin@armitage.org.uk> - 2016-06-14 16:30 +0200
  [PATCH v2 1/5] ipvs: Enable setting IPv6 multicast address for ipvs sync daemon backup Quentin Armitage <quentin@armitage.org.uk> - 2016-06-14 16:30 +0200
  Re: [PATCH v2 0/5] ipvs: fix backup sync daemon with IPv6, and minor  updates Julian Anastasov <ja@ssi.bg> - 2016-06-15 07:30 +0200
    Re: [PATCH v2 0/5] ipvs: fix backup sync daemon with IPv6, and minor  updates Julian Anastasov <ja@ssi.bg> - 2016-06-15 22:00 +0200
  [PATCH v3 4/4] ipvs: log additional sync daemon parameters Quentin Armitage <quentin@armitage.org.uk> - 2016-06-15 23:50 +0200
  [PATCH v3 0/4] ipvs: fix backup sync daemon with IPv6, and minor updates Quentin Armitage <quentin@armitage.org.uk> - 2016-06-15 23:50 +0200
    [PATCH v3 1/4] ipvs: Enable setting IPv6 multicast address for ipvs Quentin Armitage <quentin@armitage.org.uk> - 2016-06-15 23:50 +0200
    [PATCH v3 3/4] ipvs: Don't check result < 0 after setting result = 0 Quentin Armitage <quentin@armitage.org.uk> - 2016-06-15 23:50 +0200
    [PATCH v3 2/4] ipvs: Stop calling __dev_get_by_name() repeatedly when starting sync daemon Quentin Armitage <quentin@armitage.org.uk> - 2016-06-15 23:50 +0200
    Re: [PATCH v3 0/4] ipvs: fix backup sync daemon with IPv6, and minor  updates Julian Anastasov <ja@ssi.bg> - 2016-06-16 08:20 +0200
      [PATCH v4 net] ipvs: fix bind to link-local mcast IPv6 address in backup Quentin Armitage <quentin@armitage.org.uk> - 2016-06-16 09:10 +0200
        Re: [PATCH v4 net] ipvs: fix bind to link-local mcast IPv6 address  in backup Julian Anastasov <ja@ssi.bg> - 2016-06-17 08:50 +0200
          Re: [PATCH v4 net] ipvs: fix bind to link-local mcast IPv6 address  in backup Simon Horman <horms@verge.net.au> - 2016-06-23 03:30 +0200
      [PATCH net-next v4 1/3] ipvs: Stop calling __dev_get_by_name() repeatedly when starting sync daemon Quentin Armitage <quentin@armitage.org.uk> - 2016-06-16 09:10 +0200
        [PATCH net-next v4 3/3] ipvs: log additional sync daemon parameters Quentin Armitage <quentin@armitage.org.uk> - 2016-06-16 09:10 +0200
        [PATCH net-next v4 2/3] ipvs: Don't check result < 0 after setting result = 0 Quentin Armitage <quentin@armitage.org.uk> - 2016-06-16 09:10 +0200

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