Make dumping large numbers of flows possible.

[sliver-openvswitch.git] / datapath / forward.c

diff --git a/datapath/forward.c b/datapath/forward.c
index a2b6691..bfc5815 100644 (file)
--- a/datapath/forward.c
+++ b/datapath/forward.c
@@ -21,9 +21,6 @@
 
 /* FIXME: do we need to use GFP_ATOMIC everywhere here? */
 
-static void execute_actions(struct datapath *, struct sk_buff *,
-                               const struct sw_flow_key *,
-                               const struct ofp_action *, int n_actions);
 static int make_writable(struct sk_buff **);
 
 static struct sk_buff *retrieve_skb(uint32_t id);
@@ -44,7 +41,7 @@ void fwd_port_input(struct sw_chain *chain, struct sk_buff *skb, int in_port)
                                flow->actions, flow->n_actions);
        } else {
                dp_output_control(chain->dp, skb, fwd_save_skb(skb), 
-                                 chain->dp->config.miss_send_len,
+                                 chain->dp->miss_send_len,
                                  OFPR_NO_MATCH);
        }
 }
@@ -60,7 +57,7 @@ static int do_output(struct datapath *dp, struct sk_buff *skb, size_t max_len,
                                         max_len, OFPR_ACTION));
 }
 
-static void execute_actions(struct datapath *dp, struct sk_buff *skb,
+void execute_actions(struct datapath *dp, struct sk_buff *skb,
                                const struct sw_flow_key *key,
                                const struct ofp_action *actions, int n_actions)
 {
@@ -260,29 +257,34 @@ struct sk_buff *execute_setter(struct sk_buff *skb, uint16_t eth_proto,
 }
 
 static int
-recv_features_request(struct sw_chain *chain, const void *msg) 
+recv_features_request(struct sw_chain *chain, const struct sender *sender,
+                     const void *msg) 
 {
-       const struct ofp_header *ofr = msg;
-       return dp_send_features_reply(chain->dp, ofr->xid);
+       return dp_send_features_reply(chain->dp, sender);
 }
 
 static int
-recv_get_config_request(struct sw_chain *chain, const void *msg)
+recv_get_config_request(struct sw_chain *chain, const struct sender *sender,
+                       const void *msg)
 {
-       const struct ofp_header *ofr = msg;
-       return dp_send_config_reply(chain->dp, ofr->xid);
+       return dp_send_config_reply(chain->dp, sender);
 }
 
 static int
-recv_set_config(struct sw_chain *chain, const void *msg)
+recv_set_config(struct sw_chain *chain, const struct sender *sender,
+               const void *msg)
 {
        const struct ofp_switch_config *osc = msg;
-       chain->dp->config = *osc;
+
+       chain->dp->flags = ntohs(osc->flags);
+       chain->dp->miss_send_len = ntohs(osc->miss_send_len);
+
        return 0;
 }
 
 static int
-recv_packet_out(struct sw_chain *chain, const void *msg)
+recv_packet_out(struct sw_chain *chain, const struct sender *sender,
+               const void *msg)
 {
        const struct ofp_packet_out *opo = msg;
        struct sk_buff *skb;
@@ -330,7 +332,8 @@ recv_packet_out(struct sw_chain *chain, const void *msg)
 }
 
 static int
-recv_port_mod(struct sw_chain *chain, const void *msg)
+recv_port_mod(struct sw_chain *chain, const struct sender *sender,
+             const void *msg)
 {
        const struct ofp_port_mod *opm = msg;
 
@@ -343,6 +346,7 @@ static int
 add_flow(struct sw_chain *chain, const struct ofp_flow_mod *ofm)
 {
        int error = -ENOMEM;
+       int i;
        int n_acts;
        struct sw_flow *flow;
 
@@ -354,6 +358,19 @@ add_flow(struct sw_chain *chain, const struct ofp_flow_mod *ofm)
                goto error;
        }
 
+       /* To prevent loops, make sure there's no action to send to the
+        * OFP_TABLE virtual port.
+        */
+       for (i=0; i<n_acts; i++) {
+               const struct ofp_action *a = &ofm->actions[i];
+
+               if (a->type == htons(OFPAT_OUTPUT) 
+                                       && a->arg.output.port == htons(OFPP_TABLE)) {
+                       /* xxx Send fancy new error message? */
+                       goto error;
+               }
+       }
+
        /* Allocate memory. */
        flow = flow_alloc(n_acts, GFP_ATOMIC);
        if (flow == NULL)
@@ -363,6 +380,7 @@ add_flow(struct sw_chain *chain, const struct ofp_flow_mod *ofm)
        flow_extract_match(&flow->key, &ofm->match);
        flow->group_id = ntohl(ofm->group_id);
        flow->max_idle = ntohs(ofm->max_idle);
+       flow->priority = ntohs(ofm->priority);
        flow->timeout = jiffies + flow->max_idle * HZ;
        flow->n_actions = n_acts;
        flow->init_time = jiffies;
@@ -400,7 +418,7 @@ error:
 }
 
 static int
-recv_flow(struct sw_chain *chain, const void *msg)
+recv_flow(struct sw_chain *chain, const struct sender *sender, const void *msg)
 {
        const struct ofp_flow_mod *ofm = msg;
        uint16_t command = ntohs(ofm->command);
@@ -420,15 +438,31 @@ recv_flow(struct sw_chain *chain, const void *msg)
        }
 }
 
-/* 'msg', which is 'length' bytes long, was received from the control path.
- * Apply it to 'chain'. */
+static int
+recv_port_stats_request(struct sw_chain *chain, const struct sender *sender,
+                        const void *msg)
+{
+       return dp_send_port_stats(chain->dp, sender);
+}
+
+static int
+recv_table_stats_request(struct sw_chain *chain, const struct sender *sender,
+                         const void *msg)
+{
+       return dp_send_table_stats(chain->dp, sender);
+}
+
+/* 'msg', which is 'length' bytes long, was received across Netlink from
+ * 'sender'.  Apply it to 'chain'. */
 int
-fwd_control_input(struct sw_chain *chain, const void *msg, size_t length)
+fwd_control_input(struct sw_chain *chain, const struct sender *sender,
+                 const void *msg, size_t length)
 {
 
        struct openflow_packet {
                size_t min_size;
-               int (*handler)(struct sw_chain *, const void *);
+               int (*handler)(struct sw_chain *, const struct sender *,
+                              const void *);
        };
 
        static const struct openflow_packet packets[] = {
@@ -456,16 +490,21 @@ fwd_control_input(struct sw_chain *chain, const void *msg, size_t length)
                        sizeof (struct ofp_port_mod),
                        recv_port_mod,
                },
+               [OFPT_PORT_STATS_REQUEST] = {
+                       sizeof (struct ofp_port_stats_request),
+                       recv_port_stats_request,
+               },
+               [OFPT_TABLE_STATS_REQUEST] = {
+                       sizeof (struct ofp_table_stats_request),
+                       recv_table_stats_request,
+               },
        };
 
        const struct openflow_packet *pkt;
        struct ofp_header *oh;
 
-       if (length < sizeof(struct ofp_header))
-               return -EINVAL;
-
        oh = (struct ofp_header *) msg;
-       if (oh->version != 1 || oh->type >= ARRAY_SIZE(packets)
+       if (oh->version != OFP_VERSION || oh->type >= ARRAY_SIZE(packets)
                || ntohs(oh->length) > length)
                return -EINVAL;
 
@@ -475,7 +514,7 @@ fwd_control_input(struct sw_chain *chain, const void *msg, size_t length)
        if (length < pkt->min_size)
                return -EFAULT;
 
-       return pkt->handler(chain, msg);
+       return pkt->handler(chain, sender, msg);
 }
 
 /* Packet buffering. */