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    Subject[PATCH 197/241] ipv6: Set default hoplimit as zero.
    Date
    3.5.7.2 -stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Li RongQing <roy.qing.li@gmail.com>

    commit 14edd87dc67311556f1254a8f29cf4dd6cb5b7d1 upstream.

    Commit a02e4b7dae4551(Demark default hoplimit as zero) only changes the
    hoplimit checking condition and default value in ip6_dst_hoplimit, not
    zeros all hoplimit default value.

    Keep the zeroing ip6_template_metrics[RTAX_HOPLIMIT - 1] to force it as
    const, cause as a37e6e344910(net: force dst_default_metrics to const
    section)

    Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
    ---
    net/ipv6/route.c | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    diff --git a/net/ipv6/route.c b/net/ipv6/route.c
    index a3ef2ad..fd44184 100644
    --- a/net/ipv6/route.c
    +++ b/net/ipv6/route.c
    @@ -205,7 +205,7 @@ static struct dst_ops ip6_dst_blackhole_ops = {
    };

    static const u32 ip6_template_metrics[RTAX_MAX] = {
    - [RTAX_HOPLIMIT - 1] = 255,
    + [RTAX_HOPLIMIT - 1] = 0,
    };

    static struct rt6_info ip6_null_entry_template = {
    @@ -1135,7 +1135,7 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
    rt->rt6i_dst.addr = fl6->daddr;
    rt->rt6i_dst.plen = 128;
    rt->rt6i_idev = idev;
    - dst_metric_set(&rt->dst, RTAX_HOPLIMIT, 255);
    + dst_metric_set(&rt->dst, RTAX_HOPLIMIT, 0);

    spin_lock_bh(&icmp6_dst_lock);
    rt->dst.next = icmp6_dst_gc_list;
    --
    1.7.9.5


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