datapath: Report kernel's flow key when passing packets up to userspace.

[sliver-openvswitch.git] / ofproto / ofproto-sflow.c

diff --git a/ofproto/ofproto-sflow.c b/ofproto/ofproto-sflow.c
index 87abef9..b3206c1 100644 (file)
--- a/ofproto/ofproto-sflow.c
+++ b/ofproto/ofproto-sflow.c
@@ -25,6 +25,7 @@
 #include "hash.h"
 #include "hmap.h"
 #include "netdev.h"
+#include "netlink.h"
 #include "ofpbuf.h"
 #include "ofproto.h"
 #include "packets.h"
@@ -476,56 +477,24 @@ ofproto_sflow_odp_port_to_ifindex(const struct ofproto_sflow *os,
 }
 
 void
-ofproto_sflow_received(struct ofproto_sflow *os, struct odp_msg *msg)
+ofproto_sflow_received(struct ofproto_sflow *os,
+                       const struct dpif_upcall *upcall,
+                       const struct flow *flow)
 {
     SFL_FLOW_SAMPLE_TYPE fs;
     SFLFlow_sample_element hdrElem;
     SFLSampled_header *header;
     SFLFlow_sample_element switchElem;
     SFLSampler *sampler;
-    const struct odp_sflow_sample_header *hdr;
-    const union odp_action *actions;
-    struct ofpbuf payload;
-    size_t n_actions, n_outputs;
-    struct flow flow;
-    size_t min_size;
-    size_t i;
-
-    /* Get odp_sflow_sample_header. */
-    min_size = sizeof *msg + sizeof *hdr;
-    if (min_size > msg->length) {
-        VLOG_WARN_RL(&rl, "sFlow packet too small (%"PRIu32" < %zu)",
-                     msg->length, min_size);
-        return;
-    }
-    hdr = (const struct odp_sflow_sample_header *) (msg + 1);
-
-    /* Get actions. */
-    n_actions = hdr->n_actions;
-    if (n_actions > 65536 / sizeof *actions) {
-        VLOG_WARN_RL(&rl, "too many actions in sFlow packet (%zu > %zu)",
-                     65536 / sizeof *actions, n_actions);
-        return;
-    }
-    min_size += n_actions * sizeof *actions;
-    if (min_size > msg->length) {
-        VLOG_WARN_RL(&rl, "sFlow packet with %zu actions too small "
-                     "(%"PRIu32" < %zu)",
-                     n_actions, msg->length, min_size);
-        return;
-    }
-    actions = (const union odp_action *) (hdr + 1);
-
-    /* Get packet payload and extract flow. */
-    payload.data = (union odp_action *) (actions + n_actions);
-    payload.size = msg->length - min_size;
-    flow_extract(&payload, 0, msg->port, &flow);
+    unsigned int left;
+    struct nlattr *a;
+    size_t n_outputs;
 
     /* Build a flow sample */
     memset(&fs, 0, sizeof fs);
-    fs.input = ofproto_sflow_odp_port_to_ifindex(os, msg->port);
+    fs.input = ofproto_sflow_odp_port_to_ifindex(os, flow->in_port);
     fs.output = 0;              /* Filled in correctly below. */
-    fs.sample_pool = hdr->sample_pool;
+    fs.sample_pool = upcall->sample_pool;
 
     /* We are going to give it to the sampler that represents this input port.
      * By implementing "ingress-only" sampling like this we ensure that we
@@ -544,18 +513,18 @@ ofproto_sflow_received(struct ofproto_sflow *os, struct odp_msg *msg)
     header->header_protocol = SFLHEADER_ETHERNET_ISO8023;
     /* The frame_length should include the Ethernet FCS (4 bytes),
        but it has already been stripped,  so we need to add 4 here. */
-    header->frame_length = payload.size + 4;
+    header->frame_length = upcall->packet->size + 4;
     /* Ethernet FCS stripped off. */
     header->stripped = 4;
-    header->header_length = MIN(payload.size,
+    header->header_length = MIN(upcall->packet->size,
                                 sampler->sFlowFsMaximumHeaderSize);
-    header->header_bytes = payload.data;
+    header->header_bytes = upcall->packet->data;
 
     /* Add extended switch element. */
     memset(&switchElem, 0, sizeof(switchElem));
     switchElem.tag = SFLFLOW_EX_SWITCH;
-    switchElem.flowType.sw.src_vlan = vlan_tci_to_vid(flow.vlan_tci);
-    switchElem.flowType.sw.src_priority = vlan_tci_to_pcp(flow.vlan_tci);
+    switchElem.flowType.sw.src_vlan = vlan_tci_to_vid(flow->vlan_tci);
+    switchElem.flowType.sw.src_priority = vlan_tci_to_pcp(flow->vlan_tci);
      /* Initialize the output VLAN and priority to be the same as the input,
         but these fields can be overriden below if affected by an action. */
     switchElem.flowType.sw.dst_vlan = switchElem.flowType.sw.src_vlan;
@@ -563,18 +532,18 @@ ofproto_sflow_received(struct ofproto_sflow *os, struct odp_msg *msg)
 
     /* Figure out the output ports. */
     n_outputs = 0;
-    for (i = 0; i < n_actions; i++) {
-        const union odp_action *a = &actions[i];
-        uint16_t tci;
+    NL_ATTR_FOR_EACH_UNSAFE (a, left, upcall->actions, upcall->actions_len) {
+        ovs_be16 tci;
 
-        switch (a->type) {
+        switch (nl_attr_type(a)) {
         case ODPAT_OUTPUT:
-            fs.output = ofproto_sflow_odp_port_to_ifindex(os, a->output.port);
+            fs.output = ofproto_sflow_odp_port_to_ifindex(os,
+                                                          nl_attr_get_u32(a));
             n_outputs++;
             break;
 
         case ODPAT_SET_DL_TCI:
-            tci = a->dl_tci.tci;
+            tci = nl_attr_get_be16(a);
             switchElem.flowType.sw.dst_vlan = vlan_tci_to_vid(tci);
             switchElem.flowType.sw.dst_priority = vlan_tci_to_pcp(tci);
             break;