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tunnels: prepare percpu accounting

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Tunnels are going to use percpu for their accounting.

They are going to use a new tstats field in net_device.

skb_tunnel_rx() is changed to be a wrapper around __skb_tunnel_rx()

IPTUNNEL_XMIT() is changed to be a wrapper around __IPTUNNEL_XMIT()

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2010-09-27 00:33:35 +00:00 committed by David S. Miller
parent af5ef24113
commit 290b895e0b
3 changed files with 27 additions and 10 deletions
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1
include/linux/netdevice.h
View file

@ -1053,6 +1053,7 @@ struct net_device {
union {
void *ml_priv;
struct pcpu_lstats __percpu *lstats; /* loopback stats */
struct pcpu_tstats __percpu *tstats; /* tunnel stats */
};
/* GARP */
struct garp_port *garp_port;

24
include/net/dst.h
View file

@ -227,6 +227,23 @@ static inline void skb_dst_force(struct sk_buff *skb)
}
/**
* __skb_tunnel_rx - prepare skb for rx reinsert
* @skb: buffer
* @dev: tunnel device
*
* After decapsulation, packet is going to re-enter (netif_rx()) our stack,
* so make some cleanups. (no accounting done)
*/
static inline void __skb_tunnel_rx(struct sk_buff *skb, struct net_device *dev)
{
skb->dev = dev;
skb->rxhash = 0;
skb_set_queue_mapping(skb, 0);
skb_dst_drop(skb);
nf_reset(skb);
}
/**
* skb_tunnel_rx - prepare skb for rx reinsert
* @skb: buffer
@ -234,17 +251,14 @@ static inline void skb_dst_force(struct sk_buff *skb)
*
* After decapsulation, packet is going to re-enter (netif_rx()) our stack,
* so make some cleanups, and perform accounting.
* Note: this accounting is not SMP safe.
*/
static inline void skb_tunnel_rx(struct sk_buff *skb, struct net_device *dev)
{
skb->dev = dev;
/* TODO : stats should be SMP safe */
dev->stats.rx_packets++;
dev->stats.rx_bytes += skb->len;
skb->rxhash = 0;
skb_set_queue_mapping(skb, 0);
skb_dst_drop(skb);
nf_reset(skb);
__skb_tunnel_rx(skb, dev);
}
/* Children define the path of the packet through the

12
include/net/ipip.h
View file

@ -45,7 +45,7 @@ struct ip_tunnel_prl_entry {
struct rcu_head rcu_head;
};
#define IPTUNNEL_XMIT() do { \
#define __IPTUNNEL_XMIT(stats1, stats2) do { \
int err; \
int pkt_len = skb->len - skb_transport_offset(skb); \
\
@ -54,12 +54,14 @@ struct ip_tunnel_prl_entry {
\
err = ip_local_out(skb); \
if (likely(net_xmit_eval(err) == 0)) { \
txq->tx_bytes += pkt_len; \
txq->tx_packets++; \
(stats1)->tx_bytes += pkt_len; \
(stats1)->tx_packets++; \
} else { \
stats->tx_errors++; \
stats->tx_aborted_errors++; \
(stats2)->tx_errors++; \
(stats2)->tx_aborted_errors++; \
} \
} while (0)
#define IPTUNNEL_XMIT() __IPTUNNEL_XMIT(txq, stats)
#endif