1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
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#include <net/ip_tunnels.h>
29
30#include "conntrack.h"
31#include "flow.h"
32#include "flow_table.h"
33
34#define DP_MAX_PORTS USHRT_MAX
35#define DP_VPORT_HASH_BUCKETS 1024
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52struct dp_stats_percpu {
53 u64 n_hit;
54 u64 n_missed;
55 u64 n_lost;
56 u64 n_mask_hit;
57 struct u64_stats_sync syncp;
58};
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75struct datapath {
76 struct rcu_head rcu;
77 struct list_head list_node;
78
79
80 struct flow_table table;
81
82
83 struct hlist_head *ports;
84
85
86 struct dp_stats_percpu __percpu *stats_percpu;
87
88
89 possible_net_t net;
90
91 u32 user_features;
92
93 u32 max_headroom;
94};
95
96
97
98
99
100
101
102
103
104
105struct ovs_skb_cb {
106 struct vport *input_vport;
107 u16 mru;
108 u16 acts_origlen;
109 u32 cutlen;
110};
111#define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb)
112
113
114
115
116
117
118
119
120
121
122
123
124struct dp_upcall_info {
125 struct ip_tunnel_info *egress_tun_info;
126 const struct nlattr *userdata;
127 const struct nlattr *actions;
128 int actions_len;
129 u32 portid;
130 u8 cmd;
131 u16 mru;
132};
133
134
135
136
137
138
139struct ovs_net {
140 struct list_head dps;
141 struct work_struct dp_notify_work;
142
143
144 bool xt_label;
145};
146
147extern unsigned int ovs_net_id;
148void ovs_lock(void);
149void ovs_unlock(void);
150
151#ifdef CONFIG_LOCKDEP
152int lockdep_ovsl_is_held(void);
153#else
154#define lockdep_ovsl_is_held() 1
155#endif
156
157#define ASSERT_OVSL() WARN_ON(!lockdep_ovsl_is_held())
158#define ovsl_dereference(p) \
159 rcu_dereference_protected(p, lockdep_ovsl_is_held())
160#define rcu_dereference_ovsl(p) \
161 rcu_dereference_check(p, lockdep_ovsl_is_held())
162
163static inline struct net *ovs_dp_get_net(const struct datapath *dp)
164{
165 return read_pnet(&dp->net);
166}
167
168static inline void ovs_dp_set_net(struct datapath *dp, struct net *net)
169{
170 write_pnet(&dp->net, net);
171}
172
173struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no);
174
175static inline struct vport *ovs_vport_rcu(const struct datapath *dp, int port_no)
176{
177 WARN_ON_ONCE(!rcu_read_lock_held());
178 return ovs_lookup_vport(dp, port_no);
179}
180
181static inline struct vport *ovs_vport_ovsl_rcu(const struct datapath *dp, int port_no)
182{
183 WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held());
184 return ovs_lookup_vport(dp, port_no);
185}
186
187static inline struct vport *ovs_vport_ovsl(const struct datapath *dp, int port_no)
188{
189 ASSERT_OVSL();
190 return ovs_lookup_vport(dp, port_no);
191}
192
193extern struct notifier_block ovs_dp_device_notifier;
194extern struct genl_family dp_vport_genl_family;
195
196void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key);
197void ovs_dp_detach_port(struct vport *);
198int ovs_dp_upcall(struct datapath *, struct sk_buff *,
199 const struct sw_flow_key *, const struct dp_upcall_info *,
200 uint32_t cutlen);
201
202const char *ovs_dp_name(const struct datapath *dp);
203struct sk_buff *ovs_vport_cmd_build_info(struct vport *, u32 pid, u32 seq,
204 u8 cmd);
205
206int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb,
207 const struct sw_flow_actions *, struct sw_flow_key *);
208
209void ovs_dp_notify_wq(struct work_struct *work);
210
211int action_fifos_init(void);
212void action_fifos_exit(void);
213
214
215#define OVS_MASKED(OLD, KEY, MASK) ((KEY) | ((OLD) & ~(MASK)))
216#define OVS_SET_MASKED(OLD, KEY, MASK) ((OLD) = OVS_MASKED(OLD, KEY, MASK))
217
218#define OVS_NLERR(logging_allowed, fmt, ...) \
219do { \
220 if (logging_allowed && net_ratelimit()) \
221 pr_info("netlink: " fmt "\n", ##__VA_ARGS__); \
222} while (0)
223#endif
224