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openvswitch: refactor ovs flow extract API.

Browse source 
OVS flow extract is called on packet receive or packet
execute code path.  Following patch defines separate API
for extracting flow-key in packet execute code path.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Andy Zhou <azhou@nicira.com>
This commit is contained in:
Pravin B Shelar 2014-09-15 19:20:31 -07:00
parent 2ff3e4e486
commit 83c8df26a3
7 changed files with 71 additions and 41 deletions
Download patch file Download diff file Expand all files Collapse all files

49
net/openvswitch/flow.c
View file

@ -16,8 +16,6 @@
* 02110-1301, USA
*/
#include "flow.h"
#include "datapath.h"
#include <linux/uaccess.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
@ -46,6 +44,10 @@
#include <net/ipv6.h>
#include <net/ndisc.h>
#include "datapath.h"
#include "flow.h"
#include "flow_netlink.h"
u64 ovs_flow_used_time(unsigned long flow_jiffies)
{
struct timespec cur_ts;
@ -420,10 +422,9 @@ invalid:
}
/**
* ovs_flow_extract - extracts a flow key from an Ethernet frame.
* key_extract - extracts a flow key from an Ethernet frame.
* @skb: sk_buff that contains the frame, with skb->data pointing to the
* Ethernet header
* @in_port: port number on which @skb was received.
* @key: output flow key
*
* The caller must ensure that skb->len >= ETH_HLEN.
@ -442,19 +443,11 @@ invalid:
* of a correct length, otherwise the same as skb->network_header.
* For other key->eth.type values it is left untouched.
*/
int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key)
static int key_extract(struct sk_buff *skb, struct sw_flow_key *key)
{
int error;
struct ethhdr *eth;
memset(key, 0, sizeof(*key));
key->phy.priority = skb->priority;
if (OVS_CB(skb)->tun_key)
memcpy(&key->tun_key, OVS_CB(skb)->tun_key, sizeof(key->tun_key));
key->phy.in_port = in_port;
key->phy.skb_mark = skb->mark;
skb_reset_mac_header(skb);
/* Link layer. We are guaranteed to have at least the 14 byte Ethernet
@ -610,6 +603,34 @@ int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key)
}
}
}
return 0;
}
int ovs_flow_key_extract(struct sk_buff *skb, struct sw_flow_key *key)
{
/* Extract metadata from packet. */
memset(key, 0, sizeof(*key));
if (OVS_CB(skb)->tun_key)
memcpy(&key->tun_key, OVS_CB(skb)->tun_key, sizeof(key->tun_key));
key->phy.priority = skb->priority;
key->phy.in_port = OVS_CB(skb)->input_vport->port_no;
key->phy.skb_mark = skb->mark;
return key_extract(skb, key);
}
int ovs_flow_key_extract_userspace(const struct nlattr *attr,
struct sk_buff *skb,
struct sw_flow_key *key)
{
int err;
memset(key, 0, sizeof(*key));
/* Extract metadata from netlink attributes. */
err = ovs_nla_get_flow_metadata(attr, key);
if (err)
return err;
return key_extract(skb, key);
}