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authorLaurent Riffard <laurent.riffard@free.fr>2006-11-18 12:03:04 +0100
committerJeff Garzik <jeff@garzik.org>2006-11-30 06:14:06 -0500
commit418e8f3d7ef4a30d4b5c84440641c9792a7f83f1 (patch)
tree9a594b5625f4a90509ed997647f7698e214fafe4 /drivers/net/bonding
parentc1cb0b77f905a2f5f297e91fafbe766acc143891 (diff)
[PATCH] bonding: fix an oops when slave device does not provide get_stats
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>
Diffstat (limited to 'drivers/net/bonding')
-rw-r--r--drivers/net/bonding/bond_main.c63
1 files changed, 36 insertions, 27 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 17a461152d39..488d8ed9e740 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -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);
-
- 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->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->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;
+ 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->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->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;
+ }
}
read_unlock_bh(&bond->lock);