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net: add rx_nohandler stat counter

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This adds an rx_nohandler stat counter, along with a sysfs statistics
node, and copies the counter out via netlink as well.

CC: "David S. Miller" <davem@davemloft.net>
CC: Eric Dumazet <edumazet@google.com>
CC: Jiri Pirko <jiri@mellanox.com>
CC: Daniel Borkmann <daniel@iogearbox.net>
CC: Tom Herbert <tom@herbertland.com>
CC: Jay Vosburgh <j.vosburgh@gmail.com>
CC: Veaceslav Falico <vfalico@gmail.com>
CC: Andy Gospodarek <gospo@cumulusnetworks.com>
CC: netdev@vger.kernel.org
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jarod Wilson 2016-02-01 18:51:05 -05:00 committed by David S. Miller
parent 9256645af0
commit 6e7333d315
5 changed files with 16 additions and 1 deletions
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3
include/linux/netdevice.h
View File

@ -1397,6 +1397,8 @@ enum netdev_priv_flags {
* do not use this in drivers
* @tx_dropped: Dropped packets by core network,
* do not use this in drivers
* @rx_nohandler: nohandler dropped packets by core network on
* inactive devices, do not use this in drivers
*
* @wireless_handlers: List of functions to handle Wireless Extensions,
* instead of ioctl,
@ -1611,6 +1613,7 @@ struct net_device {
atomic_long_t rx_dropped;
atomic_long_t tx_dropped;
atomic_long_t rx_nohandler;
#ifdef CONFIG_WIRELESS_EXT
const struct iw_handler_def * wireless_handlers;

4
include/uapi/linux/if_link.h
View File

@ -35,6 +35,8 @@ struct rtnl_link_stats {
/* for cslip etc */
__u32 rx_compressed;
__u32 tx_compressed;
__u32 rx_nohandler; /* dropped, no handler found */
};
/* The main device statistics structure */
@ -68,6 +70,8 @@ struct rtnl_link_stats64 {
/* for cslip etc */
__u64 rx_compressed;
__u64 tx_compressed;
__u64 rx_nohandler; /* dropped, no handler found */
};
/* The struct should be in sync with struct ifmap */

6
net/core/dev.c
View File

@ -4154,7 +4154,10 @@ static int __netif_receive_skb_core(struct sk_buff *skb, bool pfmemalloc)
ret = pt_prev->func(skb, skb->dev, pt_prev, orig_dev);
} else {
drop:
atomic_long_inc(&skb->dev->rx_dropped);
if (!deliver_exact)
atomic_long_inc(&skb->dev->rx_dropped);
else
atomic_long_inc(&skb->dev->rx_nohandler);
kfree_skb(skb);
/* Jamal, now you will not able to escape explaining
* me how you were going to use this. :-)
@ -7307,6 +7310,7 @@ struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
}
storage->rx_dropped += atomic_long_read(&dev->rx_dropped);
storage->tx_dropped += atomic_long_read(&dev->tx_dropped);
storage->rx_nohandler += atomic_long_read(&dev->rx_nohandler);
return storage;
}
EXPORT_SYMBOL(dev_get_stats);

2
net/core/net-sysfs.c
View File

@ -574,6 +574,7 @@ NETSTAT_ENTRY(tx_heartbeat_errors);
NETSTAT_ENTRY(tx_window_errors);
NETSTAT_ENTRY(rx_compressed);
NETSTAT_ENTRY(tx_compressed);
NETSTAT_ENTRY(rx_nohandler);
static struct attribute *netstat_attrs[] = {
&dev_attr_rx_packets.attr,
@ -599,6 +600,7 @@ static struct attribute *netstat_attrs[] = {
&dev_attr_tx_window_errors.attr,
&dev_attr_rx_compressed.attr,
&dev_attr_tx_compressed.attr,
&dev_attr_rx_nohandler.attr,
NULL
};

2
net/core/rtnetlink.c
View File

@ -804,6 +804,8 @@ static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
a->rx_compressed = b->rx_compressed;
a->tx_compressed = b->tx_compressed;
a->rx_nohandler = b->rx_nohandler;
}
static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)