diff options
| author | Eric Dumazet <dada1@cosmosbay.com> | 2009-04-23 03:39:04 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-05-01 15:18:19 -0700 |
| commit | 689c96cca7ec3d2ba7fba00481810f99f1803c63 (patch) | |
| tree | 0aede65eabbcbcb8bb0eaebca225a56772e5a8eb | |
| parent | 00b64f2aa5e8741b49e48ebad1116cc78dbbf0fd (diff) | |
| download | blackbird-op-linux-689c96cca7ec3d2ba7fba00481810f99f1803c63.tar.gz blackbird-op-linux-689c96cca7ec3d2ba7fba00481810f99f1803c63.zip | |
bonding: bond_slave_info_query() fix
bond_slave_info_query() should keep a read lock while accessing slave info,
or risk accessing stale data and corruption.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/bonding/bond_main.c | 23 |
1 files changed, 7 insertions, 16 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 63369b6b14d4..67515b78ff91 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -2213,33 +2213,24 @@ static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *in { struct bonding *bond = netdev_priv(bond_dev); struct slave *slave; - int i, found = 0; - - if (info->slave_id < 0) { - return -ENODEV; - } + int i, res = -ENODEV; read_lock(&bond->lock); bond_for_each_slave(bond, slave, i) { if (i == (int)info->slave_id) { - found = 1; + res = 0; + strcpy(info->slave_name, slave->dev->name); + info->link = slave->link; + info->state = slave->state; + info->link_failure_count = slave->link_failure_count; break; } } read_unlock(&bond->lock); - if (found) { - strcpy(info->slave_name, slave->dev->name); - info->link = slave->link; - info->state = slave->state; - info->link_failure_count = slave->link_failure_count; - } else { - return -ENODEV; - } - - return 0; + return res; } /*-------------------------------- Monitoring -------------------------------*/ |
