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| author |   Rusty Russell <rusty@rustcorp.com.au> | 2007-03-28 14:29:08 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@sunset.davemloft.net> | 2007-04-25 22:28:26 -0700 |
| commit | c45d286e72dd72c0229dc9e2849743ba427fee84 (patch) | |
| tree | 1fb22a5e71c89043671380087def5bc419a37886 /net | |
| parent | [NET]: random functions can use nsec resolution instead of usec (diff) | |
| download | linux-dev-c45d286e72dd72c0229dc9e2849743ba427fee84.tar.xz linux-dev-c45d286e72dd72c0229dc9e2849743ba427fee84.zip | |
[NET]: Inline net_device_stats
Network drivers which keep stats allocate their own stats structure
then write a get_stats() function to return them. It would be nice if
this were done by default.
1) Add a new "stats" field to "struct net_device".
2) Add a new feature field to say "this driver uses the internal one"
3) Have a default "get_stats" which returns NULL if that feature not set.
4) Change callers to check result of get_stats call for NULL, not if
->get_stats is set.
This should not break backwards compatibility with older drivers, yet
allow modern drivers to shed some boilerplate code.
Lightly tested: works for a modified lguest network driver.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/dev.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 86dc9f693f66..fec8cf27f75d 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -817,7 +817,6 @@ static int default_rebuild_header(struct sk_buff *skb) return 1; } - /** * dev_open - prepare an interface for use. * @dev: device to open @@ -2096,9 +2095,9 @@ void dev_seq_stop(struct seq_file *seq, void *v) static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev) { - if (dev->get_stats) { - struct net_device_stats *stats = dev->get_stats(dev); + struct net_device_stats *stats = dev->get_stats(dev); + if (stats) { seq_printf(seq, "%6s:%8lu %7lu %4lu %4lu %4lu %5lu %10lu %9lu " "%8lu %7lu %4lu %4lu %4lu %5lu %7lu %10lu\n", dev->name, stats->rx_bytes, stats->rx_packets, @@ -3282,6 +3281,13 @@ out: mutex_unlock(&net_todo_run_mutex); } +static struct net_device_stats *maybe_internal_stats(struct net_device *dev) +{ + if (dev->features & NETIF_F_INTERNAL_STATS) + return &dev->stats; + return NULL; +} + /** * alloc_netdev - allocate network device * @sizeof_priv: size of private data to allocate space for @@ -3317,6 +3323,7 @@ struct net_device *alloc_netdev(int sizeof_priv, const char *name, if (sizeof_priv) dev->priv = netdev_priv(dev); + dev->get_stats = maybe_internal_stats; setup(dev); strcpy(dev->name, name); return dev; |