From: Jarod Wilson jarod@redhat.com
[ Upstream commit 4ca0d9ac3fd8f9f90b72a15d8da2aca3ffb58418 ]
Broadcast mode bonds transmit a copy of all traffic simultaneously out of all interfaces, so the "speed" of the bond isn't really the aggregate of all interfaces, but rather, the speed of the slowest active interface.
Also, the type of the speed field is u32, not unsigned long, so adjust that accordingly, as required to make min() function here without complaining about mismatching types.
Fixes: bb5b052f751b ("bond: add support to read speed and duplex via ethtool") CC: Jay Vosburgh j.vosburgh@gmail.com CC: Veaceslav Falico vfalico@gmail.com CC: Andy Gospodarek andy@greyhouse.net CC: "David S. Miller" davem@davemloft.net CC: netdev@vger.kernel.org Acked-by: Jay Vosburgh jay.vosburgh@canonical.com Signed-off-by: Jarod Wilson jarod@redhat.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/bonding/bond_main.c | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-)
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 6b40b5ab143a7..7abb3e2cc9926 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -4336,13 +4336,23 @@ static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev) return ret; }
+static u32 bond_mode_bcast_speed(struct slave *slave, u32 speed) +{ + if (speed == 0 || speed == SPEED_UNKNOWN) + speed = slave->speed; + else + speed = min(speed, slave->speed); + + return speed; +} + static int bond_ethtool_get_link_ksettings(struct net_device *bond_dev, struct ethtool_link_ksettings *cmd) { struct bonding *bond = netdev_priv(bond_dev); - unsigned long speed = 0; struct list_head *iter; struct slave *slave; + u32 speed = 0;
cmd->base.duplex = DUPLEX_UNKNOWN; cmd->base.port = PORT_OTHER; @@ -4354,8 +4364,13 @@ static int bond_ethtool_get_link_ksettings(struct net_device *bond_dev, */ bond_for_each_slave(bond, slave, iter) { if (bond_slave_can_tx(slave)) { - if (slave->speed != SPEED_UNKNOWN) - speed += slave->speed; + if (slave->speed != SPEED_UNKNOWN) { + if (BOND_MODE(bond) == BOND_MODE_BROADCAST) + speed = bond_mode_bcast_speed(slave, + speed); + else + speed += slave->speed; + } if (cmd->base.duplex == DUPLEX_UNKNOWN && slave->duplex != DUPLEX_UNKNOWN) cmd->base.duplex = slave->duplex;