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ipv6: prevent router_solicitations for team port

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The issue fixed for bonding in commit c2edacf80e ("bonding / ipv6: no
addrconf for slaves separately from master") also exists in team driver.
However, we can't just disable ipv6 addrconf for team ports, as 'teamd'
will need it when nsns_ping watch is used in the user space.

Instead of preventing ipv6 addrconf, this patch only prevents RS packets
for team ports, as it did in commit b52e1cce31 ("ipv6: Don't send rs
packets to the interface of ARPHRD_TUNNEL").

Note that we do not prevent DAD packets, to avoid the changes getting
intricate / hacky. Also, usually sysctl dad_transmits is set to 1 and
only 1 DAD packet will be sent, and by now no libteam user complains
about DAD packets on team ports, unlike RS packets.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2023-03-22 19:35:41 -04:00 committed by David S. Miller
parent e346df60b8
commit 2df9bf4d04
1 changed files with 2 additions and 1 deletions
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3
net/ipv6/addrconf.c
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@ -4223,7 +4223,8 @@ static void addrconf_dad_completed(struct inet6_ifaddr *ifp, bool bump_id,
ipv6_accept_ra(ifp->idev) &&
ifp->idev->cnf.rtr_solicits != 0 &&
(dev->flags & IFF_LOOPBACK) == 0 &&
(dev->type != ARPHRD_TUNNEL);
(dev->type != ARPHRD_TUNNEL) &&
!netif_is_team_port(dev);
read_unlock_bh(&ifp->idev->lock);
/* While dad is in progress mld report's source address is in6_addrany.