/*
- * Copyright (c) 2009, 2010 Nicira Networks.
+ * Copyright (c) 2009, 2010, 2011 Nicira Networks.
* Distributed under the terms of the GNU GPL version 2.
*
* Significant portions of this file may be copied from parts of the Linux
#define FLOW_H 1
#include <linux/kernel.h>
+#include <linux/netlink.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/rcupdate.h>
-#include <linux/gfp.h>
+#include <linux/if_ether.h>
+#include <linux/in6.h>
#include <linux/jiffies.h>
#include <linux/time.h>
struct sw_flow_actions {
struct rcu_head rcu;
- unsigned int n_actions;
- union odp_action actions[];
+ u32 actions_len;
+ struct nlattr actions[];
+};
+
+struct sw_flow_key {
+ __be64 tun_id; /* Encapsulating tunnel ID. */
+ union {
+ struct {
+ __be32 ipv4_src; /* IPv4 source address. */
+ __be32 ipv4_dst; /* IPv4 destination address. */
+ };
+ struct {
+ struct in6_addr ipv6_src; /* IPv6 source address. */
+ struct in6_addr ipv6_dst; /* IPv6 source address. */
+ };
+ };
+ struct in6_addr nd_target; /* IPv6 ND target address. */
+ u16 in_port; /* Input switch port. */
+ __be16 dl_tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */
+ __be16 dl_type; /* Ethernet frame type. */
+ __be16 tp_src; /* TCP/UDP source port. */
+ __be16 tp_dst; /* TCP/UDP destination port. */
+ u8 dl_src[ETH_ALEN]; /* Ethernet source address. */
+ u8 dl_dst[ETH_ALEN]; /* Ethernet destination address. */
+ u8 nw_proto; /* IP protocol or lower 8 bits of ARP opcode. */
+ u8 nw_tos; /* IP ToS (DSCP field, 6 bits). */
+ u8 arp_sha[ETH_ALEN]; /* ARP/ND source hardware address. */
+ u8 arp_tha[ETH_ALEN]; /* ARP/ND target hardware address. */
};
struct sw_flow {
struct rcu_head rcu;
struct tbl_node tbl_node;
- struct odp_flow_key key;
- struct sw_flow_actions *sf_acts;
+ struct sw_flow_key key;
+ struct sw_flow_actions __rcu *sf_acts;
- u8 ip_tos; /* IP TOS value. */
+ atomic_t refcnt;
+ bool dead;
spinlock_t lock; /* Lock for values below. */
unsigned long used; /* Last used time (in jiffies). */
u8 tcp_flags; /* Union of seen TCP flags. */
};
-extern struct kmem_cache *flow_cache;
+struct arp_eth_header
+{
+ __be16 ar_hrd; /* format of hardware address */
+ __be16 ar_pro; /* format of protocol address */
+ unsigned char ar_hln; /* length of hardware address */
+ unsigned char ar_pln; /* length of protocol address */
+ __be16 ar_op; /* ARP opcode (command) */
+
+ /* Ethernet+IPv4 specific members. */
+ unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
+ unsigned char ar_sip[4]; /* sender IP address */
+ unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
+ unsigned char ar_tip[4]; /* target IP address */
+} __packed;
-struct sw_flow_actions *flow_actions_alloc(size_t n_actions);
+int flow_init(void);
+void flow_exit(void);
+
+struct sw_flow *flow_alloc(void);
void flow_deferred_free(struct sw_flow *);
+void flow_free_tbl(struct tbl_node *);
+
+struct sw_flow_actions *flow_actions_alloc(const struct nlattr *);
void flow_deferred_free_acts(struct sw_flow_actions *);
-int flow_extract(struct sk_buff *, u16 in_port, struct odp_flow_key *);
+
+void flow_hold(struct sw_flow *);
+void flow_put(struct sw_flow *);
+
+int flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *, bool *is_frag);
void flow_used(struct sw_flow *, struct sk_buff *);
+u64 flow_used_time(unsigned long flow_jiffies);
-struct sw_flow *flow_cast(const struct tbl_node *);
-u32 flow_hash(const struct odp_flow_key *key);
+u32 flow_hash(const struct sw_flow_key *);
int flow_cmp(const struct tbl_node *, void *target);
-void flow_free_tbl(struct tbl_node *);
-int flow_init(void);
-void flow_exit(void);
+/* Upper bound on the length of a nlattr-formatted flow key. The longest
+ * nlattr-formatted flow key would be:
+ *
+ * struct pad nl hdr total
+ * ------ --- ------ -----
+ * ODP_KEY_ATTR_TUN_ID 8 -- 4 12
+ * ODP_KEY_ATTR_IN_PORT 4 -- 4 8
+ * ODP_KEY_ATTR_ETHERNET 12 -- 4 16
+ * ODP_KEY_ATTR_8021Q 4 -- 4 8
+ * ODP_KEY_ATTR_ETHERTYPE 2 2 4 8
+ * ODP_KEY_ATTR_IPV6 34 2 4 40
+ * ODP_KEY_ATTR_ICMPV6 2 2 4 8
+ * ODP_KEY_ATTR_ND 28 -- 4 32
+ * -------------------------------------------------
+ * total 132
+ */
+#define FLOW_BUFSIZE 132
+
+int flow_to_nlattrs(const struct sw_flow_key *, struct sk_buff *);
+int flow_from_nlattrs(struct sw_flow_key *swkey, const struct nlattr *);
+
+static inline struct sw_flow *flow_cast(const struct tbl_node *node)
+{
+ return container_of(node, struct sw_flow, tbl_node);
+}
#endif /* flow.h */