/*
- * Copyright (c) 2009, 2010, 2011 Nicira Networks.
- * Distributed under the terms of the GNU GPL version 2.
+ * Copyright (c) 2007-2011 Nicira, Inc.
*
- * Significant portions of this file may be copied from parts of the Linux
- * kernel, by Linus Torvalds and others.
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
*/
#ifndef FLOW_H
struct nlattr actions[];
};
+/* Tunnel flow flags. */
+#define OVS_TNL_F_DONT_FRAGMENT (1 << 0)
+#define OVS_TNL_F_CSUM (1 << 1)
+#define OVS_TNL_F_KEY (1 << 2)
+
+/* Used to memset ovs_key_ipv4_tunnel padding. */
+#define OVS_TUNNEL_KEY_SIZE \
+ (offsetof(struct ovs_key_ipv4_tunnel, ipv4_ttl) + \
+ FIELD_SIZEOF(struct ovs_key_ipv4_tunnel, ipv4_ttl))
+
+struct ovs_key_ipv4_tunnel {
+ __be64 tun_id;
+ __be32 ipv4_src;
+ __be32 ipv4_dst;
+ u16 tun_flags;
+ u8 ipv4_tos;
+ u8 ipv4_ttl;
+};
+
struct sw_flow_key {
+ struct ovs_key_ipv4_tunnel tun_key; /* Encapsulating tunnel key. */
struct {
- __be64 tun_id; /* Encapsulating tunnel ID. */
u32 priority; /* Packet QoS priority. */
- u16 in_port; /* Input switch port (or USHRT_MAX). */
+ u32 skb_mark; /* SKB mark. */
+ u16 in_port; /* Input switch port (or DP_MAX_PORTS). */
} phy;
struct {
u8 src[ETH_ALEN]; /* Ethernet source address. */
} eth;
struct {
u8 proto; /* IP protocol or lower 8 bits of ARP opcode. */
- u8 tos; /* IP ToS. */
- u8 ttl; /* IP TTL/hop limit. */
- u8 frag; /* One of OVS_FRAG_TYPE_*. */
+ u8 tos; /* IP ToS. */
+ u8 ttl; /* IP TTL/hop limit. */
+ u8 frag; /* One of OVS_FRAG_TYPE_*. */
} ip;
union {
struct {
struct in6_addr src; /* IPv6 source address. */
struct in6_addr dst; /* IPv6 destination address. */
} addr;
- __be32 label; /* IPv6 flow label. */
+ __be32 label; /* IPv6 flow label. */
struct {
__be16 src; /* TCP/UDP source port. */
__be16 dst; /* TCP/UDP destination port. */
struct sw_flow {
struct rcu_head rcu;
- struct hlist_node hash_node;
+ struct hlist_node hash_node[2];
u32 hash;
struct sw_flow_key key;
struct sw_flow_actions __rcu *sf_acts;
- atomic_t refcnt;
- bool dead;
-
spinlock_t lock; /* Lock for values below. */
unsigned long used; /* Last used time (in jiffies). */
u64 packet_count; /* Number of packets matched. */
unsigned char ar_tip[4]; /* target IP address */
} __packed;
-int flow_init(void);
-void flow_exit(void);
+int ovs_flow_init(void);
+void ovs_flow_exit(void);
-struct sw_flow *flow_alloc(void);
-void flow_deferred_free(struct sw_flow *);
+struct sw_flow *ovs_flow_alloc(void);
+void ovs_flow_deferred_free(struct sw_flow *);
+void ovs_flow_free(struct sw_flow *);
-struct sw_flow_actions *flow_actions_alloc(const struct nlattr *);
-void flow_deferred_free_acts(struct sw_flow_actions *);
+struct sw_flow_actions *ovs_flow_actions_alloc(int actions_len);
+void ovs_flow_deferred_free_acts(struct sw_flow_actions *);
-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 *,
- int *key_lenp);
-void flow_used(struct sw_flow *, struct sk_buff *);
-u64 flow_used_time(unsigned long flow_jiffies);
-
-/* Upper bound on the length of a nlattr-formatted flow key. The longest
- * nlattr-formatted flow key would be:
- *
- * struct pad nl hdr total
- * ------ --- ------ -----
- * OVS_KEY_ATTR_PRIORITY 4 -- 4 8
- * OVS_KEY_ATTR_TUN_ID 8 -- 4 12
- * OVS_KEY_ATTR_IN_PORT 4 -- 4 8
- * OVS_KEY_ATTR_ETHERNET 12 -- 4 16
- * OVS_KEY_ATTR_8021Q 4 -- 4 8
- * OVS_KEY_ATTR_ETHERTYPE 2 2 4 8
- * OVS_KEY_ATTR_IPV6 40 -- 4 44
- * OVS_KEY_ATTR_ICMPV6 2 2 4 8
- * OVS_KEY_ATTR_ND 28 -- 4 32
- * -------------------------------------------------
- * total 144
- */
-#define FLOW_BUFSIZE 144
+int ovs_flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *,
+ int *key_lenp);
+void ovs_flow_used(struct sw_flow *, struct sk_buff *);
+u64 ovs_flow_used_time(unsigned long flow_jiffies);
-int flow_to_nlattrs(const struct sw_flow_key *, struct sk_buff *);
-int flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
+int ovs_flow_to_nlattrs(const struct sw_flow_key *, struct sk_buff *);
+int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
const struct nlattr *);
-int flow_metadata_from_nlattrs(u32 *priority, u16 *in_port, __be64 *tun_id,
- const struct nlattr *);
+int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow, int key_len,
+ const struct nlattr *attr);
+#define MAX_ACTIONS_BUFSIZE (32 * 1024)
#define TBL_MIN_BUCKETS 1024
struct flow_table {
struct flex_array *buckets;
unsigned int count, n_buckets;
struct rcu_head rcu;
+ int node_ver;
+ u32 hash_seed;
+ bool keep_flows;
};
-static inline int flow_tbl_count(struct flow_table *table)
+static inline int ovs_flow_tbl_count(struct flow_table *table)
{
return table->count;
}
-static inline int flow_tbl_need_to_expand(struct flow_table *table)
+static inline int ovs_flow_tbl_need_to_expand(struct flow_table *table)
{
return (table->count > table->n_buckets);
}
-struct sw_flow *flow_tbl_lookup(struct flow_table *table,
- struct sw_flow_key *key, int len);
-void flow_tbl_destroy(struct flow_table *table);
-void flow_tbl_deferred_destroy(struct flow_table *table);
-struct flow_table *flow_tbl_alloc(int new_size);
-struct flow_table *flow_tbl_expand(struct flow_table *table);
-void flow_tbl_insert(struct flow_table *table, struct sw_flow *flow);
-void flow_tbl_remove(struct flow_table *table, struct sw_flow *flow);
-u32 flow_hash(const struct sw_flow_key *key, int key_len);
-
-struct sw_flow *flow_tbl_next(struct flow_table *table, u32 *bucket, u32 *idx);
-extern const u32 ovs_key_lens[OVS_KEY_ATTR_MAX + 1];
+struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *table,
+ struct sw_flow_key *key, int len);
+void ovs_flow_tbl_destroy(struct flow_table *table);
+void ovs_flow_tbl_deferred_destroy(struct flow_table *table);
+struct flow_table *ovs_flow_tbl_alloc(int new_size);
+struct flow_table *ovs_flow_tbl_expand(struct flow_table *table);
+struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table);
+void ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow,
+ struct sw_flow_key *key, int key_len);
+void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow);
+
+struct sw_flow *ovs_flow_tbl_next(struct flow_table *table, u32 *bucket, u32 *idx);
+extern const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1];
+int ipv4_tun_from_nlattr(const struct nlattr *attr,
+ struct ovs_key_ipv4_tunnel *tun_key);
+int ipv4_tun_to_nlattr(struct sk_buff *skb,
+ const struct ovs_key_ipv4_tunnel *tun_key);
#endif /* flow.h */
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