linux-kernel - Re: [PATCH net-next v10 07/13] net: ipv6: Init tunnel link-netns before registering dev

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Message-ID: <20250221040641.77646-1-kuniyu@amazon.com>
Date: Thu, 20 Feb 2025 20:06:41 -0800
From: Kuniyuki Iwashima <kuniyu@...zon.com>
To: <shaw.leon@...il.com>
CC: <alex.aring@...il.com>, <andrew+netdev@...n.ch>,
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Subject: Re: [PATCH net-next v10 07/13] net: ipv6: Init tunnel link-netns before registering dev

From: Xiao Liang <shaw.leon@...il.com>
Date: Wed, 19 Feb 2025 20:50:33 +0800
> Currently some IPv6 tunnel drivers set tnl->net to dev_net(dev) in
> ndo_init(), which is called in register_netdevice(). However, it lacks
> the context of link-netns when we enable cross-net tunnels at device
> registration time.
> 
> Let's move the init of tunnel link-netns before register_netdevice().
> 
> ip6_gre has already initialized netns, so just remove the redundant
> assignment.
> 
> Signed-off-by: Xiao Liang <shaw.leon@...il.com>

Reviewed-by: Kuniyuki Iwashima <kuniyu@...zon.com>

left a small comment, but not a blocker.


> @@ -1565,6 +1565,7 @@ static int ipip6_newlink(struct net_device *dev,
>  	int err;
>  
>  	nt = netdev_priv(dev);
> +	nt->net = net;

This hunk is not necessary as we'll call ipip6_tunnel_locate(),
but it's harmless and not worth reposting the whole series given
we are alredy in v10.  You can just post a follow-up patch after
the series is applied.

Thanks!