From 98f41f694f46085fda475cdee8cc0b6d2c5e6f1f Mon Sep 17 00:00:00 2001 From: Weiping Pan Date: Mon, 31 Oct 2011 17:20:48 +0000 Subject: bonding:update speed/duplex for NETDEV_CHANGE Zheng Liang(lzheng@redhat.com) found a bug that if we config bonding with arp monitor, sometimes bonding driver cannot get the speed and duplex from its slaves, it will assume them to be 100Mb/sec and Full, please see /proc/net/bonding/bond0. But there is no such problem when uses miimon. (Take igb for example) I find that the reason is that after dev_open() in bond_enslave(), bond_update_speed_duplex() will call igb_get_settings() , but in that function, it runs ethtool_cmd_speed_set(ecmd, -1); ecmd->duplex = -1; because igb get an error value of status. So even dev_open() is called, but the device is not really ready to get its settings. Maybe it is safe for us to call igb_get_settings() only after this message shows up, that is "igb: p4p1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX". So I prefer to update the speed and duplex for a slave when reseices NETDEV_CHANGE/NETDEV_UP event. Changelog V2: 1 remove the "fake 100/Full" logic in bond_update_speed_duplex(), set speed and duplex to -1 when it gets error value of speed and duplex. 2 delete the warning in bond_enslave() if bond_update_speed_duplex() returns error. 3 make bond_info_show_slave() handle bad values of speed and duplex. Signed-off-by: Weiping Pan Signed-off-by: David S. Miller --- drivers/net/bonding/bond_main.c | 37 ++++++++++++------------------------- 1 file changed, 12 insertions(+), 25 deletions(-) (limited to 'drivers/net/bonding/bond_main.c') diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index c34cc1e7c6f6..b2b9109b6712 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -550,7 +550,7 @@ down: /* * Get link speed and duplex from the slave's base driver * using ethtool. If for some reason the call fails or the - * values are invalid, fake speed and duplex to 100/Full + * values are invalid, set speed and duplex to -1, * and return error. */ static int bond_update_speed_duplex(struct slave *slave) @@ -560,9 +560,8 @@ static int bond_update_speed_duplex(struct slave *slave) u32 slave_speed; int res; - /* Fake speed and duplex */ - slave->speed = SPEED_100; - slave->duplex = DUPLEX_FULL; + slave->speed = -1; + slave->duplex = -1; res = __ethtool_get_settings(slave_dev, &ecmd); if (res < 0) @@ -1751,16 +1750,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) new_slave->link = BOND_LINK_DOWN; } - if (bond_update_speed_duplex(new_slave) && - (new_slave->link != BOND_LINK_DOWN)) { - pr_warning("%s: Warning: failed to get speed and duplex from %s, assumed to be 100Mb/sec and Full.\n", - bond_dev->name, new_slave->dev->name); - - if (bond->params.mode == BOND_MODE_8023AD) { - pr_warning("%s: Warning: Operation of 802.3ad mode requires ETHTOOL support in base driver for proper aggregator selection.\n", - bond_dev->name); - } - } + bond_update_speed_duplex(new_slave); if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { /* if there is a primary slave, remember it */ @@ -3220,6 +3210,7 @@ static int bond_slave_netdev_event(unsigned long event, { struct net_device *bond_dev = slave_dev->master; struct bonding *bond = netdev_priv(bond_dev); + struct slave *slave = NULL; switch (event) { case NETDEV_UNREGISTER: @@ -3230,20 +3221,16 @@ static int bond_slave_netdev_event(unsigned long event, bond_release(bond_dev, slave_dev); } break; + case NETDEV_UP: case NETDEV_CHANGE: - if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) { - struct slave *slave; + slave = bond_get_slave_by_dev(bond, slave_dev); + if (slave) { + u32 old_speed = slave->speed; + u8 old_duplex = slave->duplex; - slave = bond_get_slave_by_dev(bond, slave_dev); - if (slave) { - u32 old_speed = slave->speed; - u8 old_duplex = slave->duplex; - - bond_update_speed_duplex(slave); - - if (bond_is_lb(bond)) - break; + bond_update_speed_duplex(slave); + if (bond->params.mode == BOND_MODE_8023AD) { if (old_speed != slave->speed) bond_3ad_adapter_speed_changed(slave); if (old_duplex != slave->duplex) -- cgit v1.2.3-55-g7522