datapath: Replace "struct odp_action" by Netlink attributes.

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

diff --git a/datapath/flow.c b/datapath/flow.c
index 7684c06..8a6ee23 100644 (file)
--- a/datapath/flow.c
+++ b/datapath/flow.c
@@ -31,8 +31,8 @@
 
 #include "compat.h"
 
-struct kmem_cache *flow_cache;
-static unsigned int hash_seed;
+static struct kmem_cache *flow_cache;
+static unsigned int hash_seed __read_mostly;
 
 static inline bool arphdr_ok(struct sk_buff *skb)
 {
@@ -104,46 +104,57 @@ void flow_used(struct sw_flow *flow, struct sk_buff *skb)
        spin_unlock_bh(&flow->lock);
 }
 
-struct sw_flow_actions *flow_actions_alloc(size_t n_actions)
+struct sw_flow_actions *flow_actions_alloc(u32 actions_len)
 {
        struct sw_flow_actions *sfa;
 
+       if (actions_len % NLA_ALIGNTO)
+               return ERR_PTR(-EINVAL);
+
        /* At least DP_MAX_PORTS actions are required to be able to flood a
         * packet to every port.  Factor of 2 allows for setting VLAN tags,
         * etc. */
-       if (n_actions > 2 * DP_MAX_PORTS)
+       if (actions_len > 2 * DP_MAX_PORTS * nla_total_size(4))
                return ERR_PTR(-EINVAL);
 
-       sfa = kmalloc(sizeof *sfa + n_actions * sizeof(union odp_action),
-                     GFP_KERNEL);
+       sfa = kmalloc(sizeof *sfa + actions_len, GFP_KERNEL);
        if (!sfa)
                return ERR_PTR(-ENOMEM);
 
-       sfa->n_actions = n_actions;
+       sfa->actions_len = actions_len;
        return sfa;
 }
 
-
-/* Frees 'flow' immediately. */
-static void flow_free(struct sw_flow *flow)
+struct sw_flow *flow_alloc(void)
 {
-       if (unlikely(!flow))
-               return;
-       kfree(flow->sf_acts);
-       kmem_cache_free(flow_cache, flow);
+       struct sw_flow *flow;
+
+       flow = kmem_cache_alloc(flow_cache, GFP_KERNEL);
+       if (!flow)
+               return ERR_PTR(-ENOMEM);
+
+       spin_lock_init(&flow->lock);
+       atomic_set(&flow->refcnt, 1);
+       flow->dead = false;
+
+       return flow;
 }
 
 void flow_free_tbl(struct tbl_node *node)
 {
        struct sw_flow *flow = flow_cast(node);
-       flow_free(flow);
+
+       flow->dead = true;
+       flow_put(flow);
 }
 
 /* RCU callback used by flow_deferred_free. */
 static void rcu_free_flow_callback(struct rcu_head *rcu)
 {
        struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu);
-       flow_free(flow);
+
+       flow->dead = true;
+       flow_put(flow);
 }
 
 /* Schedules 'flow' to be freed after the next RCU grace period.
@@ -153,6 +164,22 @@ void flow_deferred_free(struct sw_flow *flow)
        call_rcu(&flow->rcu, rcu_free_flow_callback);
 }
 
+void flow_hold(struct sw_flow *flow)
+{
+       atomic_inc(&flow->refcnt);
+}
+
+void flow_put(struct sw_flow *flow)
+{
+       if (unlikely(!flow))
+               return;
+
+       if (atomic_dec_and_test(&flow->refcnt)) {
+               kfree(flow->sf_acts);
+               kmem_cache_free(flow_cache, flow);
+       }
+}
+
 /* RCU callback used by flow_deferred_free_acts. */
 static void rcu_free_acts_callback(struct rcu_head *rcu)
 {
@@ -180,8 +207,7 @@ static void parse_vlan(struct sk_buff *skb, struct odp_flow_key *key)
                return;
 
        qp = (struct qtag_prefix *) skb->data;
-       key->dl_vlan = qp->tci & htons(VLAN_VID_MASK);
-       key->dl_vlan_pcp = (ntohs(qp->tci) & VLAN_PCP_MASK) >> VLAN_PCP_SHIFT;
+       key->dl_tci = qp->tci | htons(ODP_TCI_PRESENT);
        __skb_pull(skb, sizeof(struct qtag_prefix));
 }
 
@@ -222,6 +248,8 @@ static __be16 parse_ethertype(struct sk_buff *skb)
  * Ethernet header
  * @in_port: port number on which @skb was received.
  * @key: output flow key
+ * @is_frag: set to 1 if @skb contains an IPv4 fragment, or to 0 if @skb does
+ * not contain an IPv4 packet or if it is not a fragment.
  *
  * The caller must ensure that skb->len >= ETH_HLEN.
  *
@@ -238,19 +266,16 @@ static __be16 parse_ethertype(struct sk_buff *skb)
  *      past the IPv4 header, if one is present and of a correct length,
  *      otherwise the same as skb->network_header.  For other key->dl_type
  *      values it is left untouched.
- *
- * Sets OVS_CB(skb)->is_frag to %true if @skb is an IPv4 fragment, otherwise to
- * %false.
  */
-int flow_extract(struct sk_buff *skb, u16 in_port, struct odp_flow_key *key)
+int flow_extract(struct sk_buff *skb, u16 in_port, struct odp_flow_key *key,
+                bool *is_frag)
 {
        struct ethhdr *eth;
 
        memset(key, 0, sizeof *key);
        key->tun_id = OVS_CB(skb)->tun_id;
        key->in_port = in_port;
-       key->dl_vlan = htons(ODP_VLAN_NONE);
-       OVS_CB(skb)->is_frag = false;
+       *is_frag = false;
 
        /*
         * We would really like to pull as many bytes as we could possibly
@@ -331,9 +356,9 @@ int flow_extract(struct sk_buff *skb, u16 in_port, struct odp_flow_key *key)
                                        key->tp_dst = htons(icmp->code);
                                }
                        }
-               } else {
-                       OVS_CB(skb)->is_frag = true;
-               }
+               } else
+                       *is_frag = true;
+
        } else if (key->dl_type == htons(ETH_P_ARP) && arphdr_ok(skb)) {
                struct arp_eth_header *arp;
 
@@ -345,9 +370,8 @@ int flow_extract(struct sk_buff *skb, u16 in_port, struct odp_flow_key *key)
                                && arp->ar_pln == 4) {
 
                        /* We only match on the lower 8 bits of the opcode. */
-                       if (ntohs(arp->ar_op) <= 0xff) {
+                       if (ntohs(arp->ar_op) <= 0xff)
                                key->nw_proto = ntohs(arp->ar_op);
-                       }
 
                        if (key->nw_proto == ARPOP_REQUEST
                                        || key->nw_proto == ARPOP_REPLY) {