On Wed, May 20, 2015 at 12:32 PM, Neil McKee <[email protected]> wrote:
> Directly associate a 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 <[email protected]>
> ---
> net/openvswitch/actions.c | 14 +++++++++-----
> net/openvswitch/datapath.c | 18 ++++++++++++++++++
> net/openvswitch/datapath.h | 2 ++
> 3 files changed, 29 insertions(+), 5 deletions(-)
>
> diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c
> index b491c1c..ee5760d 100644
> --- a/net/openvswitch/actions.c
> +++ b/net/openvswitch/actions.c
> @@ -608,7 +608,8 @@ static void do_output(struct datapath *dp, struct sk_buff
> *skb, int out_port)
> }
>
> 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;
> @@ -619,6 +620,8 @@ static int output_userspace(struct datapath *dp, struct
> sk_buff *skb,
> upcall.userdata = NULL;
> upcall.portid = 0;
> upcall.egress_tun_info = NULL;
> + upcall.actions = actions;
> + upcall.actions_len = actions_len;
>
Rather than unconditionally passing actions to the upcall, there
should be attribute in ovs_userspace_attr to request the actions list.
> for (a = nla_data(attr), rem = nla_len(attr); rem > 0;
> a = nla_next(a, &rem)) {
> @@ -654,7 +657,8 @@ static int output_userspace(struct datapath *dp, struct
> sk_buff *skb,
> }
>
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