/*
   * Copyright (c) 2007-2013 Nicira, Inc.
   *
   * 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_TABLE_H
  #define FLOW_TABLE_H 1
  
  #include <linux/kernel.h>
  #include <linux/netlink.h>
  #include <linux/openvswitch.h>
  #include <linux/spinlock.h>
  #include <linux/types.h>
  #include <linux/rcupdate.h>
  #include <linux/if_ether.h>
  #include <linux/in6.h>
  #include <linux/jiffies.h>
  #include <linux/time.h>
  #include <linux/flex_array.h>
  
  #include <net/inet_ecn.h>
  #include <net/ip_tunnels.h>
  
  #include "flow.h"

  struct table_instance {

  	struct flex_array *buckets;

  	unsigned int n_buckets;

  	struct rcu_head rcu;

  	int node_ver;
  	u32 hash_seed;
  	bool keep_flows;
  };

  struct flow_table {
  	struct table_instance __rcu *ti;

  	struct table_instance __rcu *ufid_ti;

  	struct list_head mask_list;
  	unsigned long last_rehash;
  	unsigned int count;

  	unsigned int ufid_count;

  };

  extern struct kmem_cache *flow_stats_cache;

  int ovs_flow_init(void);
  void ovs_flow_exit(void);

  struct sw_flow *ovs_flow_alloc(void);

  void ovs_flow_free(struct sw_flow *, bool deferred);

  int ovs_flow_tbl_init(struct flow_table *);

  int ovs_flow_tbl_count(const struct flow_table *table);

  void ovs_flow_tbl_destroy(struct flow_table *table);

  int ovs_flow_tbl_flush(struct flow_table *flow_table);

  int ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow,

  			const struct sw_flow_mask *mask);

  void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow);

  int  ovs_flow_tbl_num_masks(const struct flow_table *table);

  struct sw_flow *ovs_flow_tbl_dump_next(struct table_instance *table,

  				       u32 *bucket, u32 *idx);

  struct sw_flow *ovs_flow_tbl_lookup_stats(struct flow_table *,

  				    const struct sw_flow_key *,
  				    u32 *n_mask_hit);

  struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *,
  				    const struct sw_flow_key *);

  struct sw_flow *ovs_flow_tbl_lookup_exact(struct flow_table *tbl,

  					  const struct sw_flow_match *match);

  struct sw_flow *ovs_flow_tbl_lookup_ufid(struct flow_table *,
  					 const struct sw_flow_id *);
  
  bool ovs_flow_cmp(const struct sw_flow *, const struct sw_flow_match *);

  void ovs_flow_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src,

  		       bool full, const struct sw_flow_mask *mask);

  #endif /* flow_table.h */