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19#ifndef DATAPATH_H
20#define DATAPATH_H 1
21
22#include <asm/page.h>
23#include <linux/kernel.h>
24#include <linux/mutex.h>
25#include <linux/netdevice.h>
26#include <linux/skbuff.h>
27#include <linux/u64_stats_sync.h>
28
29#include "flow.h"
30#include "vport.h"
31
32#define DP_MAX_PORTS USHRT_MAX
33#define DP_VPORT_HASH_BUCKETS 1024
34
35#define SAMPLE_ACTION_DEPTH 3
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49struct dp_stats_percpu {
50 u64 n_hit;
51 u64 n_missed;
52 u64 n_lost;
53 struct u64_stats_sync sync;
54};
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68
69struct datapath {
70 struct rcu_head rcu;
71 struct list_head list_node;
72
73
74 struct flow_table __rcu *table;
75
76
77 struct hlist_head *ports;
78
79
80 struct dp_stats_percpu __percpu *stats_percpu;
81
82#ifdef CONFIG_NET_NS
83
84 struct net *net;
85#endif
86};
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94
95struct ovs_skb_cb {
96 struct sw_flow *flow;
97 struct sw_flow_key *pkt_key;
98 struct ovs_key_ipv4_tunnel *tun_key;
99};
100#define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb)
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111
112struct dp_upcall_info {
113 u8 cmd;
114 const struct sw_flow_key *key;
115 const struct nlattr *userdata;
116 u32 portid;
117};
118
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123
124struct ovs_net {
125 struct list_head dps;
126 struct work_struct dp_notify_work;
127 struct vport_net vport_net;
128};
129
130extern int ovs_net_id;
131void ovs_lock(void);
132void ovs_unlock(void);
133
134#ifdef CONFIG_LOCKDEP
135int lockdep_ovsl_is_held(void);
136#else
137#define lockdep_ovsl_is_held() 1
138#endif
139
140#define ASSERT_OVSL() WARN_ON(unlikely(!lockdep_ovsl_is_held()))
141#define ovsl_dereference(p) \
142 rcu_dereference_protected(p, lockdep_ovsl_is_held())
143
144static inline struct net *ovs_dp_get_net(struct datapath *dp)
145{
146 return read_pnet(&dp->net);
147}
148
149static inline void ovs_dp_set_net(struct datapath *dp, struct net *net)
150{
151 write_pnet(&dp->net, net);
152}
153
154struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no);
155
156static inline struct vport *ovs_vport_rcu(const struct datapath *dp, int port_no)
157{
158 WARN_ON_ONCE(!rcu_read_lock_held());
159 return ovs_lookup_vport(dp, port_no);
160}
161
162static inline struct vport *ovs_vport_ovsl_rcu(const struct datapath *dp, int port_no)
163{
164 WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held());
165 return ovs_lookup_vport(dp, port_no);
166}
167
168static inline struct vport *ovs_vport_ovsl(const struct datapath *dp, int port_no)
169{
170 ASSERT_OVSL();
171 return ovs_lookup_vport(dp, port_no);
172}
173
174extern struct notifier_block ovs_dp_device_notifier;
175extern struct genl_multicast_group ovs_dp_vport_multicast_group;
176
177void ovs_dp_process_received_packet(struct vport *, struct sk_buff *);
178void ovs_dp_detach_port(struct vport *);
179int ovs_dp_upcall(struct datapath *, struct sk_buff *,
180 const struct dp_upcall_info *);
181
182const char *ovs_dp_name(const struct datapath *dp);
183struct sk_buff *ovs_vport_cmd_build_info(struct vport *, u32 pid, u32 seq,
184 u8 cmd);
185
186int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb);
187void ovs_dp_notify_wq(struct work_struct *work);
188
189#define OVS_NLERR(fmt, ...) \
190 pr_info_once("netlink: " fmt, ##__VA_ARGS__)
191
192#endif
193