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authorEric Dumazet <edumazet@google.com>2014-03-27 08:45:56 -0700
committerDavid S. Miller <davem@davemloft.net>2014-03-28 16:49:48 -0400
commit015f0688f57ca4d499047d335b8052a733e17a4d (patch)
treeab376c7815815728d7f595e4a1b37ee303bfefc4 /net
parent43279500decad66ccdddacae7948a1d23be1bef6 (diff)
downloadlinux-015f0688f57ca4d499047d335b8052a733e17a4d.tar.gz
net: net: add a core netdev->tx_dropped counter
Dropping packets in __dev_queue_xmit() when transmit queue is stopped (NIC TX ring buffer full or BQL limit reached) currently outputs a syslog message. It would be better to get a precise count of such events available in netdevice stats so that monitoring tools can have a clue. This extends the work done in caf586e5f23ce ("net: add a core netdev->rx_dropped counter") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/dev.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 48dd323d591..98ba581b89f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2880,6 +2880,7 @@ recursion_alert:
rc = -ENETDOWN;
rcu_read_unlock_bh();
+ atomic_long_inc(&dev->tx_dropped);
kfree_skb(skb);
return rc;
out:
@@ -6238,6 +6239,7 @@ struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
netdev_stats_to_stats64(storage, &dev->stats);
}
storage->rx_dropped += atomic_long_read(&dev->rx_dropped);
+ storage->tx_dropped += atomic_long_read(&dev->tx_dropped);
return storage;
}
EXPORT_SYMBOL(dev_get_stats);