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net: Enable 64-bit net device statistics on 32-bit architectures

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Use struct rtnl_link_stats64 as the statistics structure.

On 32-bit architectures, insert 32 bits of padding after/before each
field of struct net_device_stats to make its layout compatible with
struct rtnl_link_stats64.  Add an anonymous union in net_device; move
stats into the union and add struct rtnl_link_stats64 stats64.

Add net_device_ops::ndo_get_stats64, implementations of which will
return a pointer to struct rtnl_link_stats64.  Drivers that implement
this operation must not update the structure asynchronously.

Change dev_get_stats() to call ndo_get_stats64 if available, and to
return a pointer to struct rtnl_link_stats64.  Change callers of
dev_get_stats() accordingly.

Signed-off-by: Ben Hutchings <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Ben Hutchings 2010-06-08 07:19:54 +00:00 • committed by David S. Miller
commit be1f3c2c02
7 changed files with 90 additions and 67 deletions
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13
net/8021q/vlanproc.c
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@ -278,8 +278,9 @@ static int vlandev_seq_show(struct seq_file *seq, void *offset)
{
struct net_device *vlandev = (struct net_device *) seq->private;
const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
const struct net_device_stats *stats;
const struct rtnl_link_stats64 *stats;
static const char fmt[] = "%30s %12lu\n";
static const char fmt64[] = "%30s %12llu\n";
int i;
if (!is_vlan_dev(vlandev))
@ -291,12 +292,12 @@ static int vlandev_seq_show(struct seq_file *seq, void *offset)
vlandev->name, dev_info->vlan_id,
(int)(dev_info->flags & 1), vlandev->priv_flags);
seq_printf(seq, fmt, "total frames received", stats->rx_packets);
seq_printf(seq, fmt, "total bytes received", stats->rx_bytes);
seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast);
seq_printf(seq, fmt64, "total frames received", stats->rx_packets);
seq_printf(seq, fmt64, "total bytes received", stats->rx_bytes);
seq_printf(seq, fmt64, "Broadcast/Multicast Rcvd", stats->multicast);
seq_puts(seq, "\n");
seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets);
seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes);
seq_printf(seq, fmt64, "total frames transmitted", stats->tx_packets);
seq_printf(seq, fmt64, "total bytes transmitted", stats->tx_bytes);
seq_printf(seq, fmt, "total headroom inc",
dev_info->cnt_inc_headroom_on_tx);
seq_printf(seq, fmt, "total encap on xmit",