datapath/flow.h

   1 /*
   2  * Copyright (c) 2009 Nicira Networks.
   3  * Distributed under the terms of the GNU GPL version 2.
   4  *
   5  * Significant portions of this file may be copied from parts of the Linux
   6  * kernel, by Linus Torvalds and others.
   7  */
   8
   9 #ifndef FLOW_H
  10 #define FLOW_H 1
  11
  12 #include <linux/kernel.h>
  13 #include <linux/spinlock.h>
  14 #include <linux/types.h>
  15 #include <linux/rcupdate.h>
  16 #include <linux/gfp.h>
  17
  18 #include "openvswitch/datapath-protocol.h"
  19
  20 struct sk_buff;
  21
  22 struct sw_flow_actions {
  23         struct rcu_head rcu;
  24         unsigned int n_actions;
  25         union odp_action actions[];
  26 };
  27
  28 struct sw_flow {
  29         struct rcu_head rcu;
  30         struct odp_flow_key key;
  31         struct sw_flow_actions *sf_acts;
  32
  33         struct timespec used;   /* Last used time. */
  34
  35         u8 ip_tos;              /* IP TOS value. */
  36
  37         spinlock_t lock;        /* Lock for values below. */
  38         u64 packet_count;       /* Number of packets matched. */
  39         u64 byte_count;         /* Number of bytes matched. */
  40         u8 tcp_flags;           /* Union of seen TCP flags. */
  41 };
  42
  43 extern struct kmem_cache *flow_cache;
  44
  45 struct sw_flow_actions *flow_actions_alloc(size_t n_actions);
  46 void flow_free(struct sw_flow *);
  47 void flow_deferred_free(struct sw_flow *);
  48 void flow_deferred_free_acts(struct sw_flow_actions *);
  49 int flow_extract(struct sk_buff *, u16 in_port, struct odp_flow_key *);
  50 void flow_used(struct sw_flow *, struct sk_buff *);
  51
  52 int flow_init(void);
  53 void flow_exit(void);
  54
  55 #endif /* flow.h */