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netdev: introduce dev_get_stats()

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In order for the network device ops get_stats call to be immutable, the handling
of the default internal network device stats block has to be changed. Add a new
helper function which replaces the old use of internal_get_stats.

Note: change return code to make it clear that the caller should not
go changing the returned statistics.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger
2008-11-19 21:40:23 -08:00
committed by David S. Miller
parent d314774cf2
commit eeda3fd64f
8 changed files with 33 additions and 18 deletions
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6
net/core/rtnetlink.c
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@ -551,7 +551,7 @@ static void set_operstate(struct net_device *dev, unsigned char transition)
}
static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
struct net_device_stats *b)
const struct net_device_stats *b)
{
a->rx_packets = b->rx_packets;
a->tx_packets = b->tx_packets;
@ -609,7 +609,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
struct netdev_queue *txq;
struct ifinfomsg *ifm;
struct nlmsghdr *nlh;
struct net_device_stats *stats;
const struct net_device_stats *stats;
struct nlattr *attr;
nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
@ -666,7 +666,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
if (attr == NULL)
goto nla_put_failure;
stats = dev->get_stats(dev);
stats = dev_get_stats(dev);
copy_rtnl_link_stats(nla_data(attr), stats);
if (dev->rtnl_link_ops) {