From: Hangbin Liu liuhangbin@gmail.com
[ Upstream commit fa532bee17d15acf8bba4bc8e2062b7a093ba801 ]
When adding a point to point downlink to team device, we neglected to reset the team's flags, which were still using flags like BROADCAST and MULTICAST. Consequently, this would initiate ARP/DAD for P2P downlink interfaces, such as when adding a GRE device to team device. Fix this by remove multicast/broadcast flags and add p2p and noarp flags.
After removing the none ethernet interface and adding an ethernet interface to team, we need to reset team interface flags. Unlike bonding interface, team do not need restore IFF_MASTER, IFF_SLAVE flags.
Reported-by: Liang Li liali@redhat.com Closes: https://bugzilla.redhat.com/show_bug.cgi?id=2221438 Fixes: 1d76efe1577b ("team: add support for non-ethernet devices") Signed-off-by: Hangbin Liu liuhangbin@gmail.com Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/team/team.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c index c7c1ff419d75d..b318464a4fcad 100644 --- a/drivers/net/team/team.c +++ b/drivers/net/team/team.c @@ -2095,6 +2095,15 @@ static void team_setup_by_port(struct net_device *dev, dev->mtu = port_dev->mtu; memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len); eth_hw_addr_inherit(dev, port_dev); + + if (port_dev->flags & IFF_POINTOPOINT) { + dev->flags &= ~(IFF_BROADCAST | IFF_MULTICAST); + dev->flags |= (IFF_POINTOPOINT | IFF_NOARP); + } else if ((port_dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) == + (IFF_BROADCAST | IFF_MULTICAST)) { + dev->flags |= (IFF_BROADCAST | IFF_MULTICAST); + dev->flags &= ~(IFF_POINTOPOINT | IFF_NOARP); + } }
static int team_dev_type_check_change(struct net_device *dev,