netdev - Re: [PATCH net-next 2/8] ipv6: start using dst_dev

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Message-ID: <326b8a8c-fe86-4751-a81b-b5bef50e5867@kernel.org>
Date: Thu, 28 Aug 2025 15:46:05 -0600
From: David Ahern <dsahern@...nel.org>
To: Eric Dumazet <edumazet@...gle.com>, "David S . Miller"
 <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, Neal Cardwell <ncardwell@...gle.com>
Cc: Simon Horman <horms@...nel.org>, Kuniyuki Iwashima <kuniyu@...gle.com>,
 netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH net-next 2/8] ipv6: start using dst_dev_rcu()

On 8/28/25 1:58 PM, Eric Dumazet wrote:
> Refactor icmpv6_xrlim_allow() and ip6_dst_hoplimit()
> so that we acquire rcu_read_lock() a bit longer
> to be able to use dst_dev_rcu() instead of dst_dev().
> 
> __ip6_rt_update_pmtu() and rt6_do_redirect can directly
> use dst_dev_rcu() in sections already holding rcu_read_lock().
> 
> Small changes to use dst_dev_net_rcu() in
> ip6_default_advmss(), ipv6_sock_ac_join(),
> ip6_mc_find_dev() and ndisc_send_skb().
> 
> Fixes: 4a6ce2b6f2ec ("net: introduce a new function dst_dev_put()")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> ---
>  net/ipv6/anycast.c     | 2 +-
>  net/ipv6/icmp.c        | 6 +++---
>  net/ipv6/mcast.c       | 2 +-
>  net/ipv6/ndisc.c       | 2 +-
>  net/ipv6/output_core.c | 8 +++++---
>  net/ipv6/route.c       | 7 +++----
>  6 files changed, 14 insertions(+), 13 deletions(-)
> 

Reviewed-by: David Ahern <dsahern@...nel.org>