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| author | Wenyu Zhang <wenyuz@vmware.com> | 2014-11-06 06:51:24 -0800 |
|---|---|---|
| committer | Pravin B Shelar <pshelar@nicira.com> | 2014-11-09 18:58:44 -0800 |
| commit | 8f0aad6f35f7e8b3118b7b8a65e8e76b135cc4cb (patch) | |
| tree | 5f3dd8374c3c1584cb2b516f4191e70b82472f68 /net/openvswitch/datapath.c | |
| parent | 9ba559d9ca3711940be3e7207dac13c4f0654d43 (diff) | |
| download | op-kernel-dev-8f0aad6f35f7e8b3118b7b8a65e8e76b135cc4cb.zip op-kernel-dev-8f0aad6f35f7e8b3118b7b8a65e8e76b135cc4cb.tar.gz | |
openvswitch: Extend packet attribute for egress tunnel info
OVS vswitch has extended IPFIX exporter to export tunnel headers
to improve network visibility.
To export this information userspace needs to know egress tunnel
for given packet. By extending packet attributes datapath can
export egress tunnel info for given packet. So that userspace
can ask for egress tunnel info in userspace action. This
information is used to build IPFIX data for given flow.
Signed-off-by: Wenyu Zhang <wenyuz@vmware.com>
Acked-by: Romain Lenglet <rlenglet@vmware.com>
Acked-by: Ben Pfaff <blp@nicira.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Diffstat (limited to 'net/openvswitch/datapath.c')
| -rw-r--r-- | net/openvswitch/datapath.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index 6cfb44f..c2ac340 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -274,6 +274,7 @@ void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) upcall.key = key; upcall.userdata = NULL; upcall.portid = ovs_vport_find_upcall_portid(p, skb); + upcall.egress_tun_info = NULL; error = ovs_dp_upcall(dp, skb, &upcall); if (unlikely(error)) kfree_skb(skb); @@ -375,7 +376,7 @@ static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, return err; } -static size_t upcall_msg_size(const struct nlattr *userdata, +static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, unsigned int hdrlen) { size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) @@ -383,8 +384,12 @@ static size_t upcall_msg_size(const struct nlattr *userdata, + nla_total_size(ovs_key_attr_size()); /* OVS_PACKET_ATTR_KEY */ /* OVS_PACKET_ATTR_USERDATA */ - if (userdata) - size += NLA_ALIGN(userdata->nla_len); + if (upcall_info->userdata) + size += NLA_ALIGN(upcall_info->userdata->nla_len); + + /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ + if (upcall_info->egress_tun_info) + size += nla_total_size(ovs_tun_key_attr_size()); return size; } @@ -440,7 +445,7 @@ static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, else hlen = skb->len; - len = upcall_msg_size(upcall_info->userdata, hlen); + len = upcall_msg_size(upcall_info, hlen); user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC); if (!user_skb) { err = -ENOMEM; @@ -461,6 +466,14 @@ static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, nla_len(upcall_info->userdata), nla_data(upcall_info->userdata)); + if (upcall_info->egress_tun_info) { + nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY); + err = ovs_nla_put_egress_tunnel_key(user_skb, + upcall_info->egress_tun_info); + BUG_ON(err); + nla_nest_end(user_skb, nla); + } + /* Only reserve room for attribute header, packet data is added * in skb_zerocopy() */ if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { |
