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Date: Fri, 29 Apr 2022 13:38:02 +0800 From: jianghaoran <jianghaoran@...inos.cn> To: davem@...emloft.net Cc: yoshfuji@...ux-ipv6.org, dsahern@...nel.org, kuba@...nel.org, pabeni@...hat.com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH] ipv6: Don't send rs packets to the interface of ARPHRD_TUNNEL ARPHRD_TUNNEL interface can't process rs packets and will generate TX errors ex: ip tunnel add ethn mode ipip local 192.168.1.1 remote 192.168.1.2 ifconfig ethn x.x.x.x ethn: flags=209<UP,POINTOPOINT,RUNNING,NOARP> mtu 1480 inet x.x.x.x netmask 255.255.255.255 destination x.x.x.x inet6 fe80::5efe:ac1e:3cdb prefixlen 64 scopeid 0x20<link> tunnel txqueuelen 1000 (IPIP Tunnel) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 3 dropped 0 overruns 0 carrier 0 collisions 0 Signed-off-by: jianghaoran <jianghaoran@...inos.cn> --- net/ipv6/addrconf.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index b22504176588..c1039346a5de 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -4201,7 +4201,8 @@ static void addrconf_dad_completed(struct inet6_ifaddr *ifp, bool bump_id, send_rs = send_mld && ipv6_accept_ra(ifp->idev) && ifp->idev->cnf.rtr_solicits != 0 && - (dev->flags&IFF_LOOPBACK) == 0; + (dev->flags & IFF_LOOPBACK) == 0 && + (dev->type != ARPHRD_TUNNEL); read_unlock_bh(&ifp->idev->lock); /* While dad is in progress mld report's source address is in6_addrany. -- 2.25.1
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