linux/drivers/net/bonding
Weiping Pan 98f41f694f 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 <wpan@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-11-01 17:52:49 -04:00
..
bond_3ad.c bonding: eliminate bond_close race conditions 2011-10-30 03:13:14 -04:00
bond_3ad.h bonding: delete unused ad_timer 2011-06-09 15:02:19 -07:00
bond_alb.c bonding: eliminate bond_close race conditions 2011-10-30 03:13:14 -04:00
bond_alb.h bonding: move processing of recv handlers into handle_frame() 2011-04-25 12:00:30 -07:00
bond_debugfs.c bonding: add the debugfs interface to see RLB hash table 2010-12-16 13:16:05 -08:00
bond_ipv6.c bonding: do vlan cleanup 2011-07-21 13:47:58 -07:00
bond_main.c bonding:update speed/duplex for NETDEV_CHANGE 2011-11-01 17:52:49 -04:00
bond_procfs.c bonding:update speed/duplex for NETDEV_CHANGE 2011-11-01 17:52:49 -04:00
bond_sysfs.c bonding: Add a forgetten sysfs_attr_init on class_attr_bonding_masters 2011-10-22 05:08:44 -04:00
bonding.h bonding: eliminate bond_close race conditions 2011-10-30 03:13:14 -04:00
Makefile bonding, ipv4, ipv6, vlan: Handle NETDEV_BONDING_FAILOVER like NETDEV_NOTIFY_PEERS 2011-04-17 23:36:03 -07:00