From: Matteo Croce <mcroce@xxxxxxxxxx>
Date: Tue, 12 Sep 2017 17:46:37 +0200
> Currently, writing into
> net.ipv6.conf.all.{accept_dad,use_optimistic,optimistic_dad} has no effect.
> Fix handling of these flags by:
>
> - using the maximum of global and per-interface values for the
> accept_dad flag. That is, if at least one of the two values is
> non-zero, enable DAD on the interface. If at least one value is
> set to 2, enable DAD and disable IPv6 operation on the interface if
> MAC-based link-local address was found
>
> - using the logical OR of global and per-interface values for the
> optimistic_dad flag. If at least one of them is set to one, optimistic
> duplicate address detection (RFC 4429) is enabled on the interface
>
> - using the logical OR of global and per-interface values for the
> use_optimistic flag. If at least one of them is set to one,
> optimistic addresses won't be marked as deprecated during source address
> selection on the interface.
>
> While at it, as we're modifying the prototype for ipv6_use_optimistic_addr(),
> drop inline, and let the compiler decide.
>
> Fixes: 7fd2561e4ebd ("net: ipv6: Add a sysctl to make optimistic addresses useful candidates")
> Signed-off-by: Matteo Croce <mcroce@xxxxxxxxxx>
Applied, thank you.
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