LXR linux/net/openvswitch/flow

   1/*
   2 * Copyright (c) 2007-2013 Nicira, Inc.
   3 *
   4 * This program is free software; you can redistribute it and/or
   5 * modify it under the terms of version 2 of the GNU General Public
   6 * License as published by the Free Software Foundation.
   7 *
   8 * This program is distributed in the hope that it will be useful, but
   9 * WITHOUT ANY WARRANTY; without even the implied warranty of
  10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11 * General Public License for more details.
  12 *
  13 * You should have received a copy of the GNU General Public License
  14 * along with this program; if not, write to the Free Software
  15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  16 * 02110-1301, USA
  17 */
  18
  19#ifndef FLOW_TABLE_H
  20#define FLOW_TABLE_H 1
  21
  22#include <linux/kernel.h>
  23#include <linux/netlink.h>
  24#include <linux/openvswitch.h>
  25#include <linux/spinlock.h>
  26#include <linux/types.h>
  27#include <linux/rcupdate.h>
  28#include <linux/if_ether.h>
  29#include <linux/in6.h>
  30#include <linux/jiffies.h>
  31#include <linux/time.h>
  32#include <linux/flex_array.h>
  33
  34#include <net/inet_ecn.h>
  35#include <net/ip_tunnels.h>
  36
  37#include "flow.h"
  38
  39struct table_instance {
  40        struct flex_array *buckets;
  41        unsigned int n_buckets;
  42        struct rcu_head rcu;
  43        int node_ver;
  44        u32 hash_seed;
  45        bool keep_flows;
  46};
  47
  48struct flow_table {
  49        struct table_instance __rcu *ti;
  50        struct list_head mask_list;
  51        unsigned long last_rehash;
  52        unsigned int count;
  53};
  54
  55extern struct kmem_cache *flow_stats_cache;
  56
  57int ovs_flow_init(void);
  58void ovs_flow_exit(void);
  59
  60struct sw_flow *ovs_flow_alloc(void);
  61void ovs_flow_free(struct sw_flow *, bool deferred);
  62
  63int ovs_flow_tbl_init(struct flow_table *);
  64int ovs_flow_tbl_count(struct flow_table *table);
  65void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred);
  66int ovs_flow_tbl_flush(struct flow_table *flow_table);
  67
  68int ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow,
  69                        struct sw_flow_mask *mask);
  70void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow);
  71int  ovs_flow_tbl_num_masks(const struct flow_table *table);
  72struct sw_flow *ovs_flow_tbl_dump_next(struct table_instance *table,
  73                                       u32 *bucket, u32 *idx);
  74struct sw_flow *ovs_flow_tbl_lookup_stats(struct flow_table *,
  75                                    const struct sw_flow_key *,
  76                                    u32 *n_mask_hit);
  77struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *,
  78                                    const struct sw_flow_key *);
  79struct sw_flow *ovs_flow_tbl_lookup_exact(struct flow_table *tbl,
  80                                          struct sw_flow_match *match);
  81bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow,
  82                               struct sw_flow_match *match);
  83
  84void ovs_flow_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src,
  85                       const struct sw_flow_mask *mask);
  86#endif /* flow_table.h */
  87