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[PATCH] bonding: fix an oops when slave device does not provide get_stats

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Bonding driver unconditionnaly dereference get_stats function pointer
for each of its slave device. This patch
- adds a check for NULL dev->get_stats pointer in bond_get_stats
- prints a notice when the bonding device enslave a device without
  get_stats function.

Signed-off-by: Laurent Riffard <laurent.riffard@free.fr>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Laurent Riffard 2006-11-18 12:03:04 +01:00 committed by Jeff Garzik
parent c1cb0b77f9
commit 418e8f3d7e
1 changed files with 31 additions and 22 deletions
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53
drivers/net/bonding/bond_main.c
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@ -1336,6 +1336,13 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
goto err_undo_flags;
}
if (slave_dev->get_stats == NULL) {
printk(KERN_NOTICE DRV_NAME
": %s: the driver for slave device %s does not provide "
"get_stats function, network statistics will be "
"inaccurate.\n", bond_dev->name, slave_dev->name);
}
new_slave = kmalloc(sizeof(struct slave), GFP_KERNEL);
if (!new_slave) {
res = -ENOMEM;
@ -3605,33 +3612,35 @@ static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
read_lock_bh(&bond->lock);
bond_for_each_slave(bond, slave, i) {
sstats = slave->dev->get_stats(slave->dev);
if (slave->dev->get_stats) {
sstats = slave->dev->get_stats(slave->dev);
stats->rx_packets += sstats->rx_packets;
stats->rx_bytes += sstats->rx_bytes;
stats->rx_errors += sstats->rx_errors;
stats->rx_dropped += sstats->rx_dropped;
stats->rx_packets += sstats->rx_packets;
stats->rx_bytes += sstats->rx_bytes;
stats->rx_errors += sstats->rx_errors;
stats->rx_dropped += sstats->rx_dropped;
stats->tx_packets += sstats->tx_packets;
stats->tx_bytes += sstats->tx_bytes;
stats->tx_errors += sstats->tx_errors;
stats->tx_dropped += sstats->tx_dropped;
stats->tx_packets += sstats->tx_packets;
stats->tx_bytes += sstats->tx_bytes;
stats->tx_errors += sstats->tx_errors;
stats->tx_dropped += sstats->tx_dropped;
stats->multicast += sstats->multicast;
stats->collisions += sstats->collisions;
stats->multicast += sstats->multicast;
stats->collisions += sstats->collisions;
stats->rx_length_errors += sstats->rx_length_errors;
stats->rx_over_errors += sstats->rx_over_errors;
stats->rx_crc_errors += sstats->rx_crc_errors;
stats->rx_frame_errors += sstats->rx_frame_errors;
stats->rx_fifo_errors += sstats->rx_fifo_errors;
stats->rx_missed_errors += sstats->rx_missed_errors;
stats->rx_length_errors += sstats->rx_length_errors;
stats->rx_over_errors += sstats->rx_over_errors;
stats->rx_crc_errors += sstats->rx_crc_errors;
stats->rx_frame_errors += sstats->rx_frame_errors;
stats->rx_fifo_errors += sstats->rx_fifo_errors;
stats->rx_missed_errors += sstats->rx_missed_errors;
stats->tx_aborted_errors += sstats->tx_aborted_errors;
stats->tx_carrier_errors += sstats->tx_carrier_errors;
stats->tx_fifo_errors += sstats->tx_fifo_errors;
stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors;
stats->tx_window_errors += sstats->tx_window_errors;
stats->tx_aborted_errors += sstats->tx_aborted_errors;
stats->tx_carrier_errors += sstats->tx_carrier_errors;
stats->tx_fifo_errors += sstats->tx_fifo_errors;
stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors;
stats->tx_window_errors += sstats->tx_window_errors;
}
}
read_unlock_bh(&bond->lock);