#include "timeval.h"
#include "openvswitch/vlog.h"
#include "lib/odp-util.h"
+#include "lib/unaligned.h"
#include "ofproto-provider.h"
#include "lacp.h"
#define SFLOW_GC_SUBID_UNCLAIMED (uint32_t)-1
static uint32_t sflow_global_counters_subid = SFLOW_GC_SUBID_UNCLAIMED;
+/*
+ * The enum dpif_sflow_tunnel_type is to declare the types supported
+ */
+enum dpif_sflow_tunnel_type {
+ DPIF_SFLOW_TUNNEL_UNKNOWN = 0,
+ DPIF_SFLOW_TUNNEL_VXLAN,
+ DPIF_SFLOW_TUNNEL_GRE,
+ DPIF_SFLOW_TUNNEL_GRE64,
+ DPIF_SFLOW_TUNNEL_LISP,
+ DPIF_SFLOW_TUNNEL_IPSEC_GRE,
+ DPIF_SFLOW_TUNNEL_IPSEC_GRE64,
+ DPIF_SFLOW_TUNNEL_GENEVE
+};
+
struct dpif_sflow_port {
struct hmap_node hmap_node; /* In struct dpif_sflow's "ports" hmap. */
SFLDataSource_instance dsi; /* sFlow library's notion of port number. */
struct ofport *ofport; /* To retrive port stats. */
odp_port_t odp_port;
+ enum dpif_sflow_tunnel_type tunnel_type;
};
struct dpif_sflow {
sfl_poller_set_bridgePort(poller, odp_to_u32(dsp->odp_port));
}
+static enum dpif_sflow_tunnel_type
+dpif_sflow_tunnel_type(struct ofport *ofport) {
+ const char *type = netdev_get_type(ofport->netdev);
+ if (type) {
+ if (strcmp(type, "gre") == 0) {
+ return DPIF_SFLOW_TUNNEL_GRE;
+ } else if (strcmp(type, "gre64") == 0) {
+ return DPIF_SFLOW_TUNNEL_GRE64;
+ } else if (strcmp(type, "ipsec_gre") == 0) {
+ return DPIF_SFLOW_TUNNEL_IPSEC_GRE;
+ } else if (strcmp(type, "ipsec_gre64") == 0) {
+ return DPIF_SFLOW_TUNNEL_IPSEC_GRE64;
+ } else if (strcmp(type, "vxlan") == 0) {
+ return DPIF_SFLOW_TUNNEL_VXLAN;
+ } else if (strcmp(type, "lisp") == 0) {
+ return DPIF_SFLOW_TUNNEL_LISP;
+ } else if (strcmp(type, "geneve") == 0) {
+ return DPIF_SFLOW_TUNNEL_GENEVE;
+ }
+ }
+ return DPIF_SFLOW_TUNNEL_UNKNOWN;
+}
+
+static uint8_t
+dpif_sflow_tunnel_proto(enum dpif_sflow_tunnel_type tunnel_type)
+{
+ /* Default to 0 (IPPROTO_IP), meaning "unknown". */
+ uint8_t ipproto = 0;
+ switch(tunnel_type) {
+
+ case DPIF_SFLOW_TUNNEL_GRE:
+ case DPIF_SFLOW_TUNNEL_GRE64:
+ ipproto = IPPROTO_GRE;
+ break;
+
+ case DPIF_SFLOW_TUNNEL_IPSEC_GRE:
+ case DPIF_SFLOW_TUNNEL_IPSEC_GRE64:
+ ipproto = IPPROTO_ESP;
+ break;
+
+ case DPIF_SFLOW_TUNNEL_VXLAN:
+ case DPIF_SFLOW_TUNNEL_LISP:
+ case DPIF_SFLOW_TUNNEL_GENEVE:
+ ipproto = IPPROTO_UDP;
+
+ case DPIF_SFLOW_TUNNEL_UNKNOWN:
+ break;
+ }
+ return ipproto;
+}
+
void
dpif_sflow_add_port(struct dpif_sflow *ds, struct ofport *ofport,
odp_port_t odp_port) OVS_EXCLUDED(mutex)
{
struct dpif_sflow_port *dsp;
int ifindex;
+ enum dpif_sflow_tunnel_type tunnel_type;
ovs_mutex_lock(&mutex);
dpif_sflow_del_port(ds, odp_port);
+ tunnel_type = dpif_sflow_tunnel_type(ofport);
ifindex = netdev_get_ifindex(ofport->netdev);
- if (ifindex <= 0) {
- /* Not an ifindex port, so do not add a cross-reference to it here */
+ if (ifindex <= 0
+ && tunnel_type == DPIF_SFLOW_TUNNEL_UNKNOWN) {
+ /* Not an ifindex port, and not a tunnel port either
+ * so do not add a cross-reference to it here.
+ */
goto out;
}
dsp = xmalloc(sizeof *dsp);
dsp->ofport = ofport;
dsp->odp_port = odp_port;
- SFL_DS_SET(dsp->dsi, SFL_DSCLASS_IFINDEX, ifindex, 0);
+ dsp->tunnel_type = tunnel_type;
hmap_insert(&ds->ports, &dsp->hmap_node, hash_odp_port(odp_port));
- /* Add poller. */
- if (ds->sflow_agent) {
- dpif_sflow_add_poller(ds, dsp);
+ if (ifindex > 0) {
+ /* Add poller for ports that have ifindex. */
+ SFL_DS_SET(dsp->dsi, SFL_DSCLASS_IFINDEX, ifindex, 0);
+ if (ds->sflow_agent) {
+ dpif_sflow_add_poller(ds, dsp);
+ }
+ } else {
+ /* Record "ifindex unknown" for the others */
+ SFL_DS_SET(dsp->dsi, SFL_DSCLASS_IFINDEX, 0, 0);
}
out:
dpif_sflow_del_port__(struct dpif_sflow *ds, struct dpif_sflow_port *dsp)
OVS_REQUIRES(mutex)
{
- if (ds->sflow_agent) {
- sfl_agent_removePoller(ds->sflow_agent, &dsp->dsi);
- sfl_agent_removeSampler(ds->sflow_agent, &dsp->dsi);
+ if (ds->sflow_agent
+ && SFL_DS_INDEX(dsp->dsi)) {
+ sfl_agent_removePoller(ds->sflow_agent, &dsp->dsi);
+ sfl_agent_removeSampler(ds->sflow_agent, &dsp->dsi);
}
hmap_remove(&ds->ports, &dsp->hmap_node);
free(dsp);
/* Add pollers for the currently known ifindex-ports */
HMAP_FOR_EACH (dsp, hmap_node, &ds->ports) {
- dpif_sflow_add_poller(ds, dsp);
+ if (SFL_DS_INDEX(dsp->dsi)) {
+ dpif_sflow_add_poller(ds, dsp);
+ }
}
return ret;
}
+static void
+dpif_sflow_tunnel_v4(uint8_t tunnel_ipproto,
+ const struct flow_tnl *tunnel,
+ SFLSampled_ipv4 *ipv4)
+
+{
+ ipv4->protocol = tunnel_ipproto;
+ ipv4->tos = tunnel->ip_tos;
+ ipv4->src_ip.addr = (OVS_FORCE uint32_t) tunnel->ip_src;
+ ipv4->dst_ip.addr = (OVS_FORCE uint32_t) tunnel->ip_dst;
+ ipv4->src_port = (OVS_FORCE uint16_t) tunnel->tp_src;
+ ipv4->dst_port = (OVS_FORCE uint16_t) tunnel->tp_dst;
+}
+
+static void
+dpif_sflow_push_mpls_lse(struct dpif_sflow_actions *sflow_actions,
+ ovs_be32 lse)
+{
+ if (sflow_actions->mpls_stack_depth >= FLOW_MAX_MPLS_LABELS) {
+ sflow_actions->mpls_err = true;
+ return;
+ }
+
+ /* Record the new lse in host-byte-order. */
+ /* BOS flag will be fixed later when we send stack to sFlow library. */
+ sflow_actions->mpls_lse[sflow_actions->mpls_stack_depth++] = ntohl(lse);
+}
+
+static void
+dpif_sflow_pop_mpls_lse(struct dpif_sflow_actions *sflow_actions)
+{
+ if (sflow_actions->mpls_stack_depth == 0) {
+ sflow_actions->mpls_err = true;
+ return;
+ }
+ sflow_actions->mpls_stack_depth--;
+}
+
+static void
+dpif_sflow_set_mpls(struct dpif_sflow_actions *sflow_actions,
+ const struct ovs_key_mpls *mpls_key, int n)
+{
+ int ii;
+ if (n > FLOW_MAX_MPLS_LABELS) {
+ sflow_actions->mpls_err = true;
+ return;
+ }
+
+ for (ii = 0; ii < n; ii++) {
+ /* Reverse stack order, and use host-byte-order for each lse. */
+ sflow_actions->mpls_lse[n - ii - 1] = ntohl(mpls_key[ii].mpls_lse);
+ }
+ sflow_actions->mpls_stack_depth = n;
+}
+
+static void
+sflow_read_tnl_push_action(const struct nlattr *attr,
+ struct dpif_sflow_actions *sflow_actions)
+{
+ /* Modeled on lib/odp-util.c: format_odp_tnl_push_header */
+ const struct ovs_action_push_tnl *data = nl_attr_get(attr);
+ const struct eth_header *eth = (const struct eth_header *) data->header;
+ const struct ip_header *ip
+ = ALIGNED_CAST(const struct ip_header *, eth + 1);
+
+ sflow_actions->out_port = u32_to_odp(data->out_port);
+
+ /* Ethernet. */
+ /* TODO: SFlow does not currently define a MAC-in-MAC
+ * encapsulation structure. We could use an extension
+ * structure to report this.
+ */
+
+ /* IPv4 */
+ /* Cannot assume alignment so just use memcpy. */
+ sflow_actions->tunnel.ip_src = get_16aligned_be32(&ip->ip_src);
+ sflow_actions->tunnel.ip_dst = get_16aligned_be32(&ip->ip_dst);
+ sflow_actions->tunnel.ip_tos = ip->ip_tos;
+ sflow_actions->tunnel.ip_ttl = ip->ip_ttl;
+ /* The tnl_push action can supply the ip_protocol too. */
+ sflow_actions->tunnel_ipproto = ip->ip_proto;
+
+ /* Layer 4 */
+ if (data->tnl_type == OVS_VPORT_TYPE_VXLAN
+ || data->tnl_type == OVS_VPORT_TYPE_GENEVE) {
+ const struct udp_header *udp = (const struct udp_header *) (ip + 1);
+ sflow_actions->tunnel.tp_src = udp->udp_src;
+ sflow_actions->tunnel.tp_dst = udp->udp_dst;
+
+ if (data->tnl_type == OVS_VPORT_TYPE_VXLAN) {
+ const struct vxlanhdr *vxh = (const struct vxlanhdr *) (udp + 1);
+ uint64_t tun_id = ntohl(get_16aligned_be32(&vxh->vx_vni)) >> 8;
+ sflow_actions->tunnel.tun_id = htonll(tun_id);
+ } else {
+ const struct genevehdr *gnh = (const struct genevehdr *) (udp + 1);
+ uint64_t tun_id = ntohl(get_16aligned_be32(&gnh->vni)) >> 8;
+ sflow_actions->tunnel.tun_id = htonll(tun_id);
+ }
+ } else if (data->tnl_type == OVS_VPORT_TYPE_GRE) {
+ const void *l4 = ip + 1;
+ const struct gre_base_hdr *greh = (const struct gre_base_hdr *) l4;
+ ovs_16aligned_be32 *options = (ovs_16aligned_be32 *)(greh + 1);
+ if (greh->flags & htons(GRE_CSUM)) {
+ options++;
+ }
+ if (greh->flags & htons(GRE_KEY)) {
+ uint64_t tun_id = ntohl(get_16aligned_be32(options));
+ sflow_actions->tunnel.tun_id = htonll(tun_id);
+ }
+ }
+}
+
+static void
+sflow_read_set_action(const struct nlattr *attr,
+ struct dpif_sflow_actions *sflow_actions)
+{
+ enum ovs_key_attr type = nl_attr_type(attr);
+ switch (type) {
+ case OVS_KEY_ATTR_ENCAP:
+ if (++sflow_actions->encap_depth > 1) {
+ /* Do not handle multi-encap for now. */
+ sflow_actions->tunnel_err = true;
+ } else {
+ dpif_sflow_read_actions(NULL,
+ nl_attr_get(attr), nl_attr_get_size(attr),
+ sflow_actions);
+ }
+ break;
+ case OVS_KEY_ATTR_PRIORITY:
+ case OVS_KEY_ATTR_SKB_MARK:
+ case OVS_KEY_ATTR_DP_HASH:
+ case OVS_KEY_ATTR_RECIRC_ID:
+ break;
+
+ case OVS_KEY_ATTR_TUNNEL: {
+ if (++sflow_actions->encap_depth > 1) {
+ /* Do not handle multi-encap for now. */
+ sflow_actions->tunnel_err = true;
+ } else {
+ if (odp_tun_key_from_attr(attr, &sflow_actions->tunnel)
+ == ODP_FIT_ERROR) {
+ /* Tunnel parsing error. */
+ sflow_actions->tunnel_err = true;
+ }
+ }
+ break;
+ }
+
+ case OVS_KEY_ATTR_IN_PORT:
+ case OVS_KEY_ATTR_ETHERNET:
+ case OVS_KEY_ATTR_VLAN:
+ break;
+
+ case OVS_KEY_ATTR_MPLS: {
+ const struct ovs_key_mpls *mpls_key = nl_attr_get(attr);
+ size_t size = nl_attr_get_size(attr);
+ dpif_sflow_set_mpls(sflow_actions, mpls_key, size / sizeof *mpls_key);
+ break;
+ }
+
+ case OVS_KEY_ATTR_ETHERTYPE:
+ case OVS_KEY_ATTR_IPV4:
+ if (sflow_actions->encap_depth == 1) {
+ const struct ovs_key_ipv4 *key = nl_attr_get(attr);
+ if (key->ipv4_src) {
+ sflow_actions->tunnel.ip_src = key->ipv4_src;
+ }
+ if (key->ipv4_dst) {
+ sflow_actions->tunnel.ip_dst = key->ipv4_dst;
+ }
+ if (key->ipv4_proto) {
+ sflow_actions->tunnel_ipproto = key->ipv4_proto;
+ }
+ if (key->ipv4_tos) {
+ sflow_actions->tunnel.ip_tos = key->ipv4_tos;
+ }
+ if (key->ipv4_ttl) {
+ sflow_actions->tunnel.ip_tos = key->ipv4_ttl;
+ }
+ }
+ break;
+
+ case OVS_KEY_ATTR_IPV6:
+ /* TODO: parse IPv6 encap. */
+ break;
+
+ /* These have the same structure and format. */
+ case OVS_KEY_ATTR_TCP:
+ case OVS_KEY_ATTR_UDP:
+ case OVS_KEY_ATTR_SCTP:
+ if (sflow_actions->encap_depth == 1) {
+ const struct ovs_key_tcp *key = nl_attr_get(attr);
+ if (key->tcp_src) {
+ sflow_actions->tunnel.tp_src = key->tcp_src;
+ }
+ if (key->tcp_dst) {
+ sflow_actions->tunnel.tp_dst = key->tcp_dst;
+ }
+ }
+ break;
+
+ case OVS_KEY_ATTR_TCP_FLAGS:
+ case OVS_KEY_ATTR_ICMP:
+ case OVS_KEY_ATTR_ICMPV6:
+ case OVS_KEY_ATTR_ARP:
+ case OVS_KEY_ATTR_ND:
+ case OVS_KEY_ATTR_UNSPEC:
+ case __OVS_KEY_ATTR_MAX:
+ default:
+ break;
+ }
+}
+
+static void
+dpif_sflow_capture_input_mpls(const struct flow *flow,
+ struct dpif_sflow_actions *sflow_actions)
+{
+ if (eth_type_mpls(flow->dl_type)) {
+ int depth = 0;
+ int ii;
+ ovs_be32 lse;
+ /* Calculate depth by detecting BOS. */
+ for (ii = 0; ii < FLOW_MAX_MPLS_LABELS; ii++) {
+ lse = flow->mpls_lse[ii];
+ depth++;
+ if (lse & htonl(MPLS_BOS_MASK)) {
+ break;
+ }
+ }
+ /* Capture stack, reversing stack order, and
+ * using host-byte-order for each lse. BOS flag
+ * is ignored for now. It is set later when
+ * the output stack is encoded.
+ */
+ for (ii = 0; ii < depth; ii++) {
+ lse = flow->mpls_lse[ii];
+ sflow_actions->mpls_lse[depth - ii - 1] = ntohl(lse);
+ }
+ sflow_actions->mpls_stack_depth = depth;
+ }
+}
+
+void
+dpif_sflow_read_actions(const struct flow *flow,
+ const struct nlattr *actions, size_t actions_len,
+ struct dpif_sflow_actions *sflow_actions)
+{
+ const struct nlattr *a;
+ unsigned int left;
+
+ if (actions_len == 0) {
+ /* Packet dropped.*/
+ return;
+ }
+
+ if (flow != NULL) {
+ /* Make sure the MPLS output stack
+ * is seeded with the input stack.
+ */
+ dpif_sflow_capture_input_mpls(flow, sflow_actions);
+
+ /* XXX when 802.1AD(QinQ) is supported then
+ * we can do the same with VLAN stacks here
+ */
+ }
+
+ NL_ATTR_FOR_EACH (a, left, actions, actions_len) {
+ enum ovs_action_attr type = nl_attr_type(a);
+ switch (type) {
+ case OVS_ACTION_ATTR_OUTPUT:
+ /* Capture the output port in case we need it
+ * to get the output tunnel type.
+ */
+ sflow_actions->out_port = u32_to_odp(nl_attr_get_u32(a));
+ break;
+
+ case OVS_ACTION_ATTR_TUNNEL_POP:
+ /* XXX: Do not handle this for now. It's not clear
+ * if we should start with encap_depth == 1 when we
+ * see an input tunnel, or if we should assume
+ * that the input tunnel was always "popped" if it
+ * was presented to us decoded in flow->tunnel?
+ *
+ * If we do handle this it might look like this,
+ * as we clear the captured tunnel info and decrement
+ * the encap_depth:
+ *
+ * memset(&sflow_actions->tunnel, 0, sizeof struct flow_tnl);
+ * sflow_actions->tunnel_ipproto = 0;
+ * --sflow_actions->encap_depth;
+ *
+ * but for now just disable the tunnel annotation:
+ */
+ sflow_actions->tunnel_err = true;
+ break;
+
+ case OVS_ACTION_ATTR_TUNNEL_PUSH:
+ /* XXX: This actions appears to come with it's own
+ * OUTPUT action, so should it be regarded as having
+ * an implicit "pop" following it too? Put another
+ * way, would two tnl_push() actions in succession
+ * result in a packet with two layers of encap?
+ */
+ if (++sflow_actions->encap_depth > 1) {
+ /* Do not handle multi-encap for now. */
+ sflow_actions->tunnel_err = true;
+ } else {
+ sflow_read_tnl_push_action(a, sflow_actions);
+ }
+ break;
+
+ case OVS_ACTION_ATTR_USERSPACE:
+ case OVS_ACTION_ATTR_RECIRC:
+ case OVS_ACTION_ATTR_HASH:
+ break;
+
+ case OVS_ACTION_ATTR_SET_MASKED:
+ /* TODO: apply mask. XXX: Are we likely to see this? */
+ break;
+
+ case OVS_ACTION_ATTR_SET:
+ sflow_read_set_action(nl_attr_get(a), sflow_actions);
+ break;
+
+ case OVS_ACTION_ATTR_PUSH_VLAN:
+ case OVS_ACTION_ATTR_POP_VLAN:
+ /* TODO: 802.1AD(QinQ) is not supported by OVS (yet), so do not
+ * construct a VLAN-stack. The sFlow user-action cookie already
+ * captures the egress VLAN ID so there is nothing more to do here.
+ */
+ break;
+
+ case OVS_ACTION_ATTR_PUSH_MPLS: {
+ const struct ovs_action_push_mpls *mpls = nl_attr_get(a);
+ if (mpls) {
+ dpif_sflow_push_mpls_lse(sflow_actions, mpls->mpls_lse);
+ }
+ break;
+ }
+ case OVS_ACTION_ATTR_POP_MPLS: {
+ dpif_sflow_pop_mpls_lse(sflow_actions);
+ break;
+ }
+ case OVS_ACTION_ATTR_SAMPLE:
+ case OVS_ACTION_ATTR_UNSPEC:
+ case __OVS_ACTION_ATTR_MAX:
+ default:
+ break;
+ }
+ }
+}
+
+static void
+dpif_sflow_encode_mpls_stack(SFLLabelStack *stack,
+ uint32_t *mpls_lse_buf,
+ const struct dpif_sflow_actions *sflow_actions)
+{
+ /* Put the MPLS stack back into "packet header" order,
+ * and make sure the BOS flag is set correctly on the last
+ * one. Each lse is still in host-byte-order.
+ */
+ int ii;
+ uint32_t lse;
+ stack->depth = sflow_actions->mpls_stack_depth;
+ stack->stack = mpls_lse_buf;
+ for (ii = 0; ii < stack->depth; ii++) {
+ lse = sflow_actions->mpls_lse[stack->depth - ii - 1];
+ stack->stack[ii] = (lse & ~MPLS_BOS_MASK);
+ }
+ stack->stack[stack->depth - 1] |= MPLS_BOS_MASK;
+}
+
+/* Extract the output port count from the user action cookie.
+ * See http://sflow.org/sflow_version_5.txt "Input/Output port information"
+ */
+static uint32_t
+dpif_sflow_cookie_num_outputs(const union user_action_cookie *cookie)
+{
+ uint32_t format = cookie->sflow.output & 0xC0000000;
+ uint32_t port_n = cookie->sflow.output & 0x3FFFFFFF;
+ if (format == 0) {
+ return port_n ? 1 : 0;
+ }
+ else if (format == 0x80000000) {
+ return port_n;
+ }
+ return 0;
+}
+
void
dpif_sflow_received(struct dpif_sflow *ds, const struct dp_packet *packet,
- const struct flow *flow, odp_port_t odp_in_port,
- const union user_action_cookie *cookie)
+ const struct flow *flow, odp_port_t odp_in_port,
+ const union user_action_cookie *cookie,
+ const struct dpif_sflow_actions *sflow_actions)
OVS_EXCLUDED(mutex)
{
SFL_FLOW_SAMPLE_TYPE fs;
SFLFlow_sample_element hdrElem;
SFLSampled_header *header;
SFLFlow_sample_element switchElem;
+ uint8_t tnlInProto, tnlOutProto;
+ SFLFlow_sample_element tnlInElem, tnlOutElem;
+ SFLFlow_sample_element vniInElem, vniOutElem;
+ SFLFlow_sample_element mplsElem;
+ uint32_t mpls_lse_buf[FLOW_MAX_MPLS_LABELS];
SFLSampler *sampler;
struct dpif_sflow_port *in_dsp;
+ struct dpif_sflow_port *out_dsp;
ovs_be16 vlan_tci;
ovs_mutex_lock(&mutex);
fs.output = cookie->sflow.output;
+ /* Input tunnel. */
+ if (flow->tunnel.ip_dst) {
+ memset(&tnlInElem, 0, sizeof(tnlInElem));
+ tnlInElem.tag = SFLFLOW_EX_IPV4_TUNNEL_INGRESS;
+ tnlInProto = dpif_sflow_tunnel_proto(in_dsp->tunnel_type);
+ dpif_sflow_tunnel_v4(tnlInProto,
+ &flow->tunnel,
+ &tnlInElem.flowType.ipv4);
+ SFLADD_ELEMENT(&fs, &tnlInElem);
+ if (flow->tunnel.tun_id) {
+ memset(&vniInElem, 0, sizeof(vniInElem));
+ vniInElem.tag = SFLFLOW_EX_VNI_INGRESS;
+ vniInElem.flowType.tunnel_vni.vni
+ = ntohll(flow->tunnel.tun_id);
+ SFLADD_ELEMENT(&fs, &vniInElem);
+ }
+ }
+
+ /* Output tunnel. */
+ if (sflow_actions
+ && sflow_actions->encap_depth == 1
+ && !sflow_actions->tunnel_err
+ && dpif_sflow_cookie_num_outputs(cookie) == 1) {
+ tnlOutProto = sflow_actions->tunnel_ipproto;
+ if (tnlOutProto == 0) {
+ /* Try to infer the ip-protocol from the output port. */
+ if (sflow_actions->out_port != ODPP_NONE) {
+ out_dsp = dpif_sflow_find_port(ds, sflow_actions->out_port);
+ if (out_dsp) {
+ tnlOutProto = dpif_sflow_tunnel_proto(out_dsp->tunnel_type);
+ }
+ }
+ }
+ memset(&tnlOutElem, 0, sizeof(tnlOutElem));
+ tnlOutElem.tag = SFLFLOW_EX_IPV4_TUNNEL_EGRESS;
+ dpif_sflow_tunnel_v4(tnlOutProto,
+ &sflow_actions->tunnel,
+ &tnlOutElem.flowType.ipv4);
+ SFLADD_ELEMENT(&fs, &tnlOutElem);
+ if (sflow_actions->tunnel.tun_id) {
+ memset(&vniOutElem, 0, sizeof(vniOutElem));
+ vniOutElem.tag = SFLFLOW_EX_VNI_EGRESS;
+ vniOutElem.flowType.tunnel_vni.vni
+ = ntohll(sflow_actions->tunnel.tun_id);
+ SFLADD_ELEMENT(&fs, &vniOutElem);
+ }
+ }
+
+ /* MPLS output label stack. */
+ if (sflow_actions
+ && sflow_actions->mpls_stack_depth > 0
+ && !sflow_actions->mpls_err
+ && dpif_sflow_cookie_num_outputs(cookie) == 1) {
+ memset(&mplsElem, 0, sizeof(mplsElem));
+ mplsElem.tag = SFLFLOW_EX_MPLS;
+ dpif_sflow_encode_mpls_stack(&mplsElem.flowType.mpls.out_stack,
+ mpls_lse_buf,
+ sflow_actions);
+ SFLADD_ELEMENT(&fs, &mplsElem);
+ }
+
/* Submit the flow sample to be encoded into the next datagram. */
SFLADD_ELEMENT(&fs, &hdrElem);
SFLADD_ELEMENT(&fs, &switchElem);
projects / cascardo / ovs.git / blobdiff