netdev - Re: [PATCH net-next] net: ipv6: addrconf: Add accept_ra_prefix

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Date:   Wed, 10 Mar 2021 14:33:32 -0700
From:   subashab@...eaurora.org
To:     David Ahern <dsahern@...il.com>
Cc:     davem@...emloft.net, kuba@...nel.org, yoshfuji@...ux-ipv6.org,
        dsahern@...nel.org, netdev@...r.kernel.org
Subject: Re: [PATCH net-next] net: ipv6: addrconf: Add accept_ra_prefix_route.

On 2021-03-10 12:28, David Ahern wrote:
> On 3/10/21 11:49 AM, Subash Abhinov Kasiviswanathan wrote:
>> Added new procfs flag to toggle the automatic addition of prefix
>> routes on a per device basis. The new flag is accept_ra_prefix_route.
>> 
>> A value of 0 for the flag maybe used in some forwarding scenarios
>> when a userspace daemon is managing the routing.
>> Manual deletion of the kernel installed route was not sufficient as
>> kernel was adding back the route.
>> 
>> Defaults to 1 as to not break existing behavior.
>> 
>> Signed-off-by: Subash Abhinov Kasiviswanathan 
>> <subashab@...eaurora.org>
>> ---
>>  Documentation/networking/ip-sysctl.rst | 10 ++++++++++
>>  include/linux/ipv6.h                   |  1 +
>>  include/uapi/linux/ipv6.h              |  1 +
>>  net/ipv6/addrconf.c                    | 16 +++++++++++++---
>>  4 files changed, 25 insertions(+), 3 deletions(-)
>> 
>> diff --git a/Documentation/networking/ip-sysctl.rst
>> b/Documentation/networking/ip-sysctl.rst
>> index c7952ac..9f0d92d 100644
>> --- a/Documentation/networking/ip-sysctl.rst
>> +++ b/Documentation/networking/ip-sysctl.rst
>> @@ -2022,6 +2022,16 @@ accept_ra_mtu - BOOLEAN
>>  		- enabled if accept_ra is enabled.
>>  		- disabled if accept_ra is disabled.
>> 
>> +accept_ra_prefix_route - BOOLEAN
>> +	Apply the prefix route based on the RA. If disabled, kernel
>> +	does not install the route. This can be used if a userspace
>> +	daemon is managing the routing.
>> +
>> +	Functional default:
>> +
>> +		- enabled if accept_ra_prefix_route is enabled
>> +		- disabled if accept_ra_prefix_route is disabled
>> +
>>  accept_redirects - BOOLEAN
>>  	Accept Redirects.
>> 
> 
> this seems to duplicate accept_ra_pinfo

Thanks David. We will try out that entry instead and check.