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| author | Jarod Wilson <jarod@redhat.com> | 2019-05-24 09:49:28 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-05-26 13:28:23 -0700 |
| commit | 334031219a84b9994594015aab85ed7754c80176 (patch) | |
| tree | baf28492157e9c7da508b26772e922ef6cdbf85e /drivers/net | |
| parent | f4bcf14e3997a422169e5a661fa811868ca221d8 (diff) | |
| download | linux-334031219a84b9994594015aab85ed7754c80176.tar.gz linux-334031219a84b9994594015aab85ed7754c80176.tar.bz2 linux-334031219a84b9994594015aab85ed7754c80176.zip | |
bonding/802.3ad: fix slave link initialization transition states
Once in a while, with just the right timing, 802.3ad slaves will fail to
properly initialize, winding up in a weird state, with a partner system
mac address of 00:00:00:00:00:00. This started happening after a fix to
properly track link_failure_count tracking, where an 802.3ad slave that
reported itself as link up in the miimon code, but wasn't able to get a
valid speed/duplex, started getting set to BOND_LINK_FAIL instead of
BOND_LINK_DOWN. That was the proper thing to do for the general "my link
went down" case, but has created a link initialization race that can put
the interface in this odd state.
The simple fix is to instead set the slave link to BOND_LINK_DOWN again,
if the link has never been up (last_link_up == 0), so the link state
doesn't bounce from BOND_LINK_DOWN to BOND_LINK_FAIL -- it hasn't failed
in this case, it simply hasn't been up yet, and this prevents the
unnecessary state change from DOWN to FAIL and getting stuck in an init
failure w/o a partner mac.
Fixes: ea53abfab960 ("bonding/802.3ad: fix link_failure_count tracking")
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
Tested-by: Heesoon Kim <Heesoon.Kim@stratus.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Acked-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/bonding/bond_main.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 062fa7e3af4c..407f4095a37a 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -3122,13 +3122,18 @@ static int bond_slave_netdev_event(unsigned long event, case NETDEV_CHANGE: /* For 802.3ad mode only: * Getting invalid Speed/Duplex values here will put slave - * in weird state. So mark it as link-fail for the time - * being and let link-monitoring (miimon) set it right when - * correct speeds/duplex are available. + * in weird state. Mark it as link-fail if the link was + * previously up or link-down if it hasn't yet come up, and + * let link-monitoring (miimon) set it right when correct + * speeds/duplex are available. */ if (bond_update_speed_duplex(slave) && - BOND_MODE(bond) == BOND_MODE_8023AD) - slave->link = BOND_LINK_FAIL; + BOND_MODE(bond) == BOND_MODE_8023AD) { + if (slave->last_link_up) + slave->link = BOND_LINK_FAIL; + else + slave->link = BOND_LINK_DOWN; + } if (BOND_MODE(bond) == BOND_MODE_8023AD) bond_3ad_adapter_speed_duplex_changed(slave); |