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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 "flow_table.h"
31#include "vport.h"
32
33#define DP_MAX_PORTS USHRT_MAX
34#define DP_VPORT_HASH_BUCKETS 1024
35
36#define SAMPLE_ACTION_DEPTH 3
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53struct dp_stats_percpu {
54 u64 n_hit;
55 u64 n_missed;
56 u64 n_lost;
57 u64 n_mask_hit;
58 struct u64_stats_sync syncp;
59};
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73
74struct datapath {
75 struct rcu_head rcu;
76 struct list_head list_node;
77
78
79 struct flow_table table;
80
81
82 struct hlist_head *ports;
83
84
85 struct dp_stats_percpu __percpu *stats_percpu;
86
87
88 possible_net_t net;
89
90 u32 user_features;
91};
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99
100struct ovs_skb_cb {
101 struct ovs_tunnel_info *egress_tun_info;
102 struct vport *input_vport;
103};
104#define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb)
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115
116struct dp_upcall_info {
117 const struct ovs_tunnel_info *egress_tun_info;
118 const struct nlattr *userdata;
119 u32 portid;
120 u8 cmd;
121};
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127
128struct ovs_net {
129 struct list_head dps;
130 struct work_struct dp_notify_work;
131 struct vport_net vport_net;
132};
133
134extern int ovs_net_id;
135void ovs_lock(void);
136void ovs_unlock(void);
137
138#ifdef CONFIG_LOCKDEP
139int lockdep_ovsl_is_held(void);
140#else
141#define lockdep_ovsl_is_held() 1
142#endif
143
144#define ASSERT_OVSL() WARN_ON(!lockdep_ovsl_is_held())
145#define ovsl_dereference(p) \
146 rcu_dereference_protected(p, lockdep_ovsl_is_held())
147#define rcu_dereference_ovsl(p) \
148 rcu_dereference_check(p, lockdep_ovsl_is_held())
149
150static inline struct net *ovs_dp_get_net(const struct datapath *dp)
151{
152 return read_pnet(&dp->net);
153}
154
155static inline void ovs_dp_set_net(struct datapath *dp, struct net *net)
156{
157 write_pnet(&dp->net, net);
158}
159
160struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no);
161
162static inline struct vport *ovs_vport_rcu(const struct datapath *dp, int port_no)
163{
164 WARN_ON_ONCE(!rcu_read_lock_held());
165 return ovs_lookup_vport(dp, port_no);
166}
167
168static inline struct vport *ovs_vport_ovsl_rcu(const struct datapath *dp, int port_no)
169{
170 WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held());
171 return ovs_lookup_vport(dp, port_no);
172}
173
174static inline struct vport *ovs_vport_ovsl(const struct datapath *dp, int port_no)
175{
176 ASSERT_OVSL();
177 return ovs_lookup_vport(dp, port_no);
178}
179
180extern struct notifier_block ovs_dp_device_notifier;
181extern struct genl_family dp_vport_genl_family;
182
183void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key);
184void ovs_dp_detach_port(struct vport *);
185int ovs_dp_upcall(struct datapath *, struct sk_buff *,
186 const struct sw_flow_key *, const struct dp_upcall_info *);
187
188const char *ovs_dp_name(const struct datapath *dp);
189struct sk_buff *ovs_vport_cmd_build_info(struct vport *, u32 pid, u32 seq,
190 u8 cmd);
191
192int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb,
193 const struct sw_flow_actions *, struct sw_flow_key *);
194
195void ovs_dp_notify_wq(struct work_struct *work);
196
197int action_fifos_init(void);
198void action_fifos_exit(void);
199
200#define OVS_NLERR(logging_allowed, fmt, ...) \
201do { \
202 if (logging_allowed && net_ratelimit()) \
203 pr_info("netlink: " fmt "\n", ##__VA_ARGS__); \
204} while (0)
205#endif
206