openvswitch: include datapath actions with sampled-packet upcall to userspace
If new optional attribute OVS_USERSPACE_ATTR_ACTIONS is added to an
OVS_ACTION_ATTR_USERSPACE action, then include the datapath actions
in the upcall.
This Directly associates the sampled packet with the path it takes
through the virtual switch. Path information currently includes mangling,
encapsulation and decapsulation actions for tunneling protocols GRE,
VXLAN, Geneve, MPLS and QinQ, but this extension requires no further
changes to accommodate datapath actions that may be added in the
future.
Adding path information enhances visibility into complex virtual
networks.
Signed-off-by: Neil McKee <neil.mckee@inmon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c
index b491c1c..8a8c0b8 100644
--- a/net/openvswitch/actions.c
+++ b/net/openvswitch/actions.c
@@ -608,17 +608,16 @@
}
static int output_userspace(struct datapath *dp, struct sk_buff *skb,
- struct sw_flow_key *key, const struct nlattr *attr)
+ struct sw_flow_key *key, const struct nlattr *attr,
+ const struct nlattr *actions, int actions_len)
{
struct ovs_tunnel_info info;
struct dp_upcall_info upcall;
const struct nlattr *a;
int rem;
+ memset(&upcall, 0, sizeof(upcall));
upcall.cmd = OVS_PACKET_CMD_ACTION;
- upcall.userdata = NULL;
- upcall.portid = 0;
- upcall.egress_tun_info = NULL;
for (a = nla_data(attr), rem = nla_len(attr); rem > 0;
a = nla_next(a, &rem)) {
@@ -647,6 +646,13 @@
break;
}
+ case OVS_USERSPACE_ATTR_ACTIONS: {
+ /* Include actions. */
+ upcall.actions = actions;
+ upcall.actions_len = actions_len;
+ break;
+ }
+
} /* End of switch. */
}
@@ -654,7 +660,8 @@
}
static int sample(struct datapath *dp, struct sk_buff *skb,
- struct sw_flow_key *key, const struct nlattr *attr)
+ struct sw_flow_key *key, const struct nlattr *attr,
+ const struct nlattr *actions, int actions_len)
{
const struct nlattr *acts_list = NULL;
const struct nlattr *a;
@@ -688,7 +695,7 @@
*/
if (likely(nla_type(a) == OVS_ACTION_ATTR_USERSPACE &&
nla_is_last(a, rem)))
- return output_userspace(dp, skb, key, a);
+ return output_userspace(dp, skb, key, a, actions, actions_len);
skb = skb_clone(skb, GFP_ATOMIC);
if (!skb)
@@ -872,7 +879,7 @@
break;
case OVS_ACTION_ATTR_USERSPACE:
- output_userspace(dp, skb, key, a);
+ output_userspace(dp, skb, key, a, attr, len);
break;
case OVS_ACTION_ATTR_HASH:
@@ -916,7 +923,7 @@
break;
case OVS_ACTION_ATTR_SAMPLE:
- err = sample(dp, skb, key, a);
+ err = sample(dp, skb, key, a, attr, len);
break;
}