netdev - Re: [net-next] ipv6: Enable netlink notification for tentative addresses.

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Date:	Thu, 26 Aug 2010 14:22:31 -0700
From:	Ben Greear <greearb@...delatech.com>
To:	Brian Haley <brian.haley@...com>
CC:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [net-next] ipv6: Enable netlink notification for tentative addresses.

On 08/26/2010 12:57 PM, Brian Haley wrote:
> On 08/26/2010 02:50 PM, Ben Greear wrote:

>> @@ -697,9 +698,10 @@ ipv6_add_addr(struct inet6_dev *idev, const struct
>> in6_addr *addr, int pfxlen,
>>   out2:
>>          rcu_read_unlock_bh();
>>
>> -       if (likely(err == 0))
>> +       if (likely(err == 0)) {
>>                  atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP,
>> ifa);
>> -       else {
>> +               inet6_ifa_notify(RTM_NEWADDR, ifa);
>> +       } else {
>>                  kfree(ifa);
>>                  ifa = ERR_PTR(err);
>>          }
>
> This will generate two messages in some cases, for example, when lo is
> configured, or a SIT tunnel is added, see add_addr() in addrconf.c.

Would that cause any problem though?  It seems a common pattern to
send 'new-foo' netlink messages when some value in foo changes.

Thanks,
Ben

-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com

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