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Date: Tue, 3 Aug 2021 19:57:59 +0800 From: Rocco Yue <rocco.yue@...iatek.com> To: David Ahern <dsahern@...nel.org> CC: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>, <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>, <rocco.yue@...il.com>, <chao.song@...iatek.com>, <zhuoliang.zhang@...iatek.com>, Rocco Yue <rocco.yue@...iatek.com> Subject: Re: [PATCH net-next v2] ipv6: add IFLA_INET6_RA_MTU to expose mtu value in the RA message On Mon, 2021-08-02 at 07:35 -0600, David Ahern wrote: > On 8/2/21 6:40 AM, Rocco Yue wrote: >> >> Regarding setting "reject_message" in the policy, after reviewing >> the code, I fell that it is unnecessary, because the cost of >> implementing it seems to be a bit high, which requires modifying >> the function interface. The reasons is as follows: > > The policy can be setup now to do the right thing once the extack > argument is available. > > do_setlink() has an extack argument. It calls validate_linkmsg which > calls validate_link_af meaning support can be added in a single patch. > If you decide to do it, then it should be a separate patch preceding > this one. > Hi David, Thanks for your advice, I will send a separate patch to add extack arg firstly. > Then userspace should get a link notification when ra_mtu is set so it > does not have to poll. It make sense, I will do it. Thanks Rocco
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