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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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3
net/core/net-sysfs.c
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@ -270,7 +270,6 @@ static ssize_t netstat_show(const struct device *d,
unsigned long offset)
{
struct net_device *dev = to_net_dev(d);
struct net_device_stats *stats;
ssize_t ret = -EINVAL;
WARN_ON(offset > sizeof(struct net_device_stats) ||
@ -278,7 +277,7 @@ static ssize_t netstat_show(const struct device *d,
read_lock(&dev_base_lock);
if (dev_isalive(dev)) {
stats = dev->get_stats(dev);
const struct net_device_stats *stats = dev_get_stats(dev);
ret = sprintf(buf, fmt_ulong,
*(unsigned long *)(((u8 *) stats) + offset));
}