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openvswitch: Add recirc and hash action.

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Recirc action allows a packet to reenter openvswitch processing.
currently openvswitch lookup flow for packet received and execute
set of actions on that packet, with help of recirc action we can
process/modify the packet and recirculate it back in openvswitch
for another pass.

OVS hash action calculates 5-tupple hash and set hash in flow-key
hash. This can be used along with recirculation for distributing
packets among different ports for bond devices.
For example:
OVS bonding can use following actions:
Match on: bond flow; Action: hash, recirc(id)
Match on: recirc-id == id and hash lower bits == a;
          Action: output port_bond_a

Signed-off-by: Andy Zhou <azhou@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
This commit is contained in:
Andy Zhou 2014-09-15 19:37:25 -07:00 • committed by Pravin B Shelar
parent 32ae87ff79
commit 971427f353
7 changed files with 288 additions and 12 deletions
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11
net/openvswitch/datapath.c
View file

@ -156,7 +156,7 @@ static struct datapath *get_dp(struct net *net, int dp_ifindex)
}
/* Must be called with rcu_read_lock or ovs_mutex. */
static const char *ovs_dp_name(const struct datapath *dp)
const char *ovs_dp_name(const struct datapath *dp)
{
struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL);
return vport->ops->get_name(vport);
@ -2065,10 +2065,14 @@ static int __init dp_init(void)
pr_info("Open vSwitch switching datapath\n");
err = ovs_internal_dev_rtnl_link_register();
err = action_fifos_init();
if (err)
goto error;
err = ovs_internal_dev_rtnl_link_register();
if (err)
goto error_action_fifos_exit;
err = ovs_flow_init();
if (err)
goto error_unreg_rtnl_link;
@ -2101,6 +2105,8 @@ error_flow_exit:
ovs_flow_exit();
error_unreg_rtnl_link:
ovs_internal_dev_rtnl_link_unregister();
error_action_fifos_exit:
action_fifos_exit();
error:
return err;
}
@ -2114,6 +2120,7 @@ static void dp_cleanup(void)
ovs_vport_exit();
ovs_flow_exit();
ovs_internal_dev_rtnl_link_unregister();
action_fifos_exit();
}
module_init(dp_init);