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net: net: add a core netdev->tx_dropped counter

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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 caf586e5f2
("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>
This commit is contained in:
Eric Dumazet
2014-03-27 08:45:56 -07:00
committed by David S. Miller
parent 43279500de
commit 015f0688f5
2 changed files with 6 additions and 3 deletions
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7
include/linux/netdevice.h
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@@ -1311,9 +1311,10 @@ struct net_device {
int iflink;
struct net_device_stats stats;
atomic_long_t rx_dropped; /* dropped packets by core network
* Do not use this in drivers.
*/
/* dropped packets by core network, Do not use this in drivers */
atomic_long_t rx_dropped;
atomic_long_t tx_dropped;
#ifdef CONFIG_WIRELESS_EXT
/* List of functions to handle Wireless Extensions (instead of ioctl).