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 table_instance __rcu *ufid_ti;
  51        struct list_head mask_list;
  52        unsigned long last_rehash;
  53        unsigned int count;
  54        unsigned int ufid_count;
  55};
  56
  57extern struct kmem_cache *flow_stats_cache;
  58
  59int ovs_flow_init(void);
  60void ovs_flow_exit(void);
  61
  62struct sw_flow *ovs_flow_alloc(void);
  63void ovs_flow_free(struct sw_flow *, bool deferred);
  64
  65int ovs_flow_tbl_init(struct flow_table *);
  66int ovs_flow_tbl_count(const struct flow_table *table);
  67void ovs_flow_tbl_destroy(struct flow_table *table);
  68int ovs_flow_tbl_flush(struct flow_table *flow_table);
  69
  70int ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow,
  71                        const struct sw_flow_mask *mask);
  72void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow);
  73int  ovs_flow_tbl_num_masks(const struct flow_table *table);
  74struct sw_flow *ovs_flow_tbl_dump_next(struct table_instance *table,
  75                                       u32 *bucket, u32 *idx);
  76struct sw_flow *ovs_flow_tbl_lookup_stats(struct flow_table *,
  77                                    const struct sw_flow_key *,
  78                                    u32 *n_mask_hit);
  79struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *,
  80                                    const struct sw_flow_key *);
  81struct sw_flow *ovs_flow_tbl_lookup_exact(struct flow_table *tbl,
  82                                          const struct sw_flow_match *match);
  83struct sw_flow *ovs_flow_tbl_lookup_ufid(struct flow_table *,
  84                                         const struct sw_flow_id *);
  85
  86bool ovs_flow_cmp(const struct sw_flow *, const struct sw_flow_match *);
  87
  88void ovs_flow_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src,
  89                       bool full, const struct sw_flow_mask *mask);
  90#endif /* flow_table.h */
  91