Re: [PATCH] 40network: introduce auto6-dhcp6 option

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Hi Pingfan,
On 04/27/18 at 03:32pm, Pingfan Liu wrote:
> In kdump, if dump-target is ssh on ipv6, we need to sync until ipv6 addr
> is ready. Currently ip=auto6/dhcp6 provides such function. But in 1st kernel,
> it is hard to know whether the ipv6 addr is got by dhcpv6 or SLAAC.
> E.g ifcfg-eth* contains DHCPV6C=yes direction, but there is no dhcpv6
> server in the network, and then after the system is up, the user
> echo 1 > /proc/sys/net/ipv6/conf/eth0/autoconf && accept_ra by manual
> to obtain a ipv6 addr. Or vice.
> So this patch suggests to make auto6 and dhcpv6 as fallback of each
> other

Do you have github account,  now dracut commits need pull request
instead.  I created one for you and left a comment.  Can you check if
you can review and discuss in github?
https://github.com/dracutdevs/dracut/pull/397

> 
> Signed-off-by: Pingfan Liu <piliu@xxxxxxxxxx>
> ---
>  modules.d/40network/ifup.sh | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/modules.d/40network/ifup.sh b/modules.d/40network/ifup.sh
> index 0db3c02..1b4b503 100755
> --- a/modules.d/40network/ifup.sh
> +++ b/modules.d/40network/ifup.sh
> @@ -70,16 +70,17 @@ load_ipv6() {
>  }
>  
>  do_ipv6auto() {
> +    local ret
>      load_ipv6
>      echo 0 > /proc/sys/net/ipv6/conf/$netif/forwarding
>      echo 1 > /proc/sys/net/ipv6/conf/$netif/accept_ra
>      echo 1 > /proc/sys/net/ipv6/conf/$netif/accept_redirects
>      linkup $netif
> -    wait_for_ipv6_auto $netif
> +    ret=$(wait_for_ipv6_auto $netif)
>  
>      [ -n "$hostname" ] && echo "echo $hostname > /proc/sys/kernel/hostname" > /tmp/net.$netif.hostname
>  
> -    return 0
> +    return $ret
>  }
>  
>  # Handle static ip configuration
> @@ -416,6 +417,9 @@ for p in $(getargs ip=); do
>                  do_dhcp -6 ;;
>              auto6)
>                  do_ipv6auto ;;
> +            auto6-dhcp6)
> +                ret=do_ipv6auto ;;
> +                [ $ret -ne 0 ] && do_dhcp -6
>              *)
>                  do_static ;;
>          esac
> -- 
> 2.7.4
> 
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Thanks
Dave
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