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bonding: fix active-backup transition after link failure 

After the recent fix in commit 1899bb3251 ("bonding: fix state
transition issue in link monitoring"), the active-backup mode with
miimon initially come-up fine but after a link-failure, both members
transition into backup state.

Following steps to reproduce the scenario (eth1 and eth2 are the
slaves of the bond):

    ip link set eth1 up
    ip link set eth2 down
    sleep 1
    ip link set eth2 up
    ip link set eth1 down
    cat /sys/class/net/eth1/bonding_slave/state
    cat /sys/class/net/eth2/bonding_slave/state

Fixes: 1899bb3251 ("bonding: fix state transition issue in link monitoring")
CC: Jay Vosburgh <jay.vosburgh@canonical.com>
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Acked-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
This commit is contained in:
Mahesh Bandewar 2019-12-06 15:44:55 -08:00 committed by Jakub Kicinski
parent 7ae1629d4d
commit 5d485ed88d
1 changed files with 0 additions and 3 deletions
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3
drivers/net/bonding/bond_main.c
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@ -2272,9 +2272,6 @@ static void bond_miimon_commit(struct bonding *bond)
} else if (BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
/* make it immediately active */
bond_set_active_slave(slave);
} else if (slave != primary) {
/* prevent it from being the active one */
bond_set_backup_slave(slave);
}
slave_info(bond->dev, slave->dev, "link status definitely up, %u Mbps %s duplex\n",