caf2ee14bb
Replaced all instances of Nicira Networks(, Inc) to Nicira, Inc. Signed-off-by: Raju Subramanian <rsubramanian@nicira.com> Signed-off-by: Ben Pfaff <blp@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
124 lines
3.9 KiB
C
124 lines
3.9 KiB
C
/*
|
|
* Copyright (c) 2007-2012 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 DATAPATH_H
|
|
#define DATAPATH_H 1
|
|
|
|
#include <asm/page.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/u64_stats_sync.h>
|
|
|
|
#include "flow.h"
|
|
|
|
struct vport;
|
|
|
|
#define DP_MAX_PORTS 1024
|
|
#define SAMPLE_ACTION_DEPTH 3
|
|
|
|
/**
|
|
* struct dp_stats_percpu - per-cpu packet processing statistics for a given
|
|
* datapath.
|
|
* @n_hit: Number of received packets for which a matching flow was found in
|
|
* the flow table.
|
|
* @n_miss: Number of received packets that had no matching flow in the flow
|
|
* table. The sum of @n_hit and @n_miss is the number of packets that have
|
|
* been received by the datapath.
|
|
* @n_lost: Number of received packets that had no matching flow in the flow
|
|
* table that could not be sent to userspace (normally due to an overflow in
|
|
* one of the datapath's queues).
|
|
*/
|
|
struct dp_stats_percpu {
|
|
u64 n_hit;
|
|
u64 n_missed;
|
|
u64 n_lost;
|
|
struct u64_stats_sync sync;
|
|
};
|
|
|
|
/**
|
|
* struct datapath - datapath for flow-based packet switching
|
|
* @rcu: RCU callback head for deferred destruction.
|
|
* @list_node: Element in global 'dps' list.
|
|
* @n_flows: Number of flows currently in flow table.
|
|
* @table: Current flow table. Protected by genl_lock and RCU.
|
|
* @ports: Map from port number to &struct vport. %OVSP_LOCAL port
|
|
* always exists, other ports may be %NULL. Protected by RTNL and RCU.
|
|
* @port_list: List of all ports in @ports in arbitrary order. RTNL required
|
|
* to iterate or modify.
|
|
* @stats_percpu: Per-CPU datapath statistics.
|
|
*
|
|
* Context: See the comment on locking at the top of datapath.c for additional
|
|
* locking information.
|
|
*/
|
|
struct datapath {
|
|
struct rcu_head rcu;
|
|
struct list_head list_node;
|
|
|
|
/* Flow table. */
|
|
struct flow_table __rcu *table;
|
|
|
|
/* Switch ports. */
|
|
struct vport __rcu *ports[DP_MAX_PORTS];
|
|
struct list_head port_list;
|
|
|
|
/* Stats. */
|
|
struct dp_stats_percpu __percpu *stats_percpu;
|
|
};
|
|
|
|
/**
|
|
* struct ovs_skb_cb - OVS data in skb CB
|
|
* @flow: The flow associated with this packet. May be %NULL if no flow.
|
|
*/
|
|
struct ovs_skb_cb {
|
|
struct sw_flow *flow;
|
|
};
|
|
#define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb)
|
|
|
|
/**
|
|
* struct dp_upcall - metadata to include with a packet to send to userspace
|
|
* @cmd: One of %OVS_PACKET_CMD_*.
|
|
* @key: Becomes %OVS_PACKET_ATTR_KEY. Must be nonnull.
|
|
* @userdata: If nonnull, its u64 value is extracted and passed to userspace as
|
|
* %OVS_PACKET_ATTR_USERDATA.
|
|
* @pid: Netlink PID to which packet should be sent. If @pid is 0 then no
|
|
* packet is sent and the packet is accounted in the datapath's @n_lost
|
|
* counter.
|
|
*/
|
|
struct dp_upcall_info {
|
|
u8 cmd;
|
|
const struct sw_flow_key *key;
|
|
const struct nlattr *userdata;
|
|
u32 pid;
|
|
};
|
|
|
|
extern struct notifier_block ovs_dp_device_notifier;
|
|
extern struct genl_multicast_group ovs_dp_vport_multicast_group;
|
|
|
|
void ovs_dp_process_received_packet(struct vport *, struct sk_buff *);
|
|
void ovs_dp_detach_port(struct vport *);
|
|
int ovs_dp_upcall(struct datapath *, struct sk_buff *,
|
|
const struct dp_upcall_info *);
|
|
|
|
const char *ovs_dp_name(const struct datapath *dp);
|
|
struct sk_buff *ovs_vport_cmd_build_info(struct vport *, u32 pid, u32 seq,
|
|
u8 cmd);
|
|
|
|
int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb);
|
|
#endif /* datapath.h */
|