[PATCH net] team: set slave to promisc if team is already in promisc mode

[Hangbin Liu <liuhangbin@gmail.com>]

After adding a team interface to bridge, the team interface will enter
promisc mode. Then if we add a new slave to team0, the slave will keep
promisc off. Fix it by setting slave to promisc on if team master is
already in promisc mode, also do the same for allmulti.

Fixes: 3d249d4ca7d0 ("net: introduce ethernet teaming device")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
---
 drivers/net/team/team.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
index 6ed96fdfd96d..bbaa198d0960 100644
--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -1246,6 +1246,23 @@ static int team_port_add(struct team *team, struct net_device *port_dev,
 		goto err_option_port_add;
 	}
 
+	/* set promiscuity level to new slave */
+	if (team->dev->flags & IFF_PROMISC) {
+		err = dev_set_promiscuity(port_dev, 1);
+		if (err)
+			goto err_set_slave_promisc;
+	}
+
+	/* set allmulti level to new slave */
+	if (team->dev->flags & IFF_ALLMULTI) {
+		err = dev_set_allmulti(port_dev, 1);
+		if (err) {
+			if (team->dev->flags & IFF_PROMISC)
+				dev_set_promiscuity(port_dev, -1);
+			goto err_set_slave_promisc;
+		}
+	}
+
 	netif_addr_lock_bh(dev);
 	dev_uc_sync_multiple(port_dev, dev);
 	dev_mc_sync_multiple(port_dev, dev);
@@ -1262,6 +1279,9 @@ static int team_port_add(struct team *team, struct net_device *port_dev,
 
 	return 0;
 
+err_set_slave_promisc:
+	__team_option_inst_del_port(team, port);
+
 err_option_port_add:
 	team_upper_dev_unlink(team, port);
 
-- 
2.19.2