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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#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
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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};
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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};
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103
104struct ovs_skb_cb {
105 struct vport *input_vport;
106 u16 mru;
107 u32 cutlen;
108};
109#define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb)
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121
122struct dp_upcall_info {
123 struct ip_tunnel_info *egress_tun_info;
124 const struct nlattr *userdata;
125 const struct nlattr *actions;
126 int actions_len;
127 u32 portid;
128 u8 cmd;
129 u16 mru;
130};
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136
137struct ovs_net {
138 struct list_head dps;
139 struct work_struct dp_notify_work;
140
141
142 bool xt_label;
143};
144
145extern unsigned int ovs_net_id;
146void ovs_lock(void);
147void ovs_unlock(void);
148
149#ifdef CONFIG_LOCKDEP
150int lockdep_ovsl_is_held(void);
151#else
152#define lockdep_ovsl_is_held() 1
153#endif
154
155#define ASSERT_OVSL() WARN_ON(!lockdep_ovsl_is_held())
156#define ovsl_dereference(p) \
157 rcu_dereference_protected(p, lockdep_ovsl_is_held())
158#define rcu_dereference_ovsl(p) \
159 rcu_dereference_check(p, lockdep_ovsl_is_held())
160
161static inline struct net *ovs_dp_get_net(const struct datapath *dp)
162{
163 return read_pnet(&dp->net);
164}
165
166static inline void ovs_dp_set_net(struct datapath *dp, struct net *net)
167{
168 write_pnet(&dp->net, net);
169}
170
171struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no);
172
173static inline struct vport *ovs_vport_rcu(const struct datapath *dp, int port_no)
174{
175 WARN_ON_ONCE(!rcu_read_lock_held());
176 return ovs_lookup_vport(dp, port_no);
177}
178
179static inline struct vport *ovs_vport_ovsl_rcu(const struct datapath *dp, int port_no)
180{
181 WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held());
182 return ovs_lookup_vport(dp, port_no);
183}
184
185static inline struct vport *ovs_vport_ovsl(const struct datapath *dp, int port_no)
186{
187 ASSERT_OVSL();
188 return ovs_lookup_vport(dp, port_no);
189}
190
191extern struct notifier_block ovs_dp_device_notifier;
192extern struct genl_family dp_vport_genl_family;
193
194void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key);
195void ovs_dp_detach_port(struct vport *);
196int ovs_dp_upcall(struct datapath *, struct sk_buff *,
197 const struct sw_flow_key *, const struct dp_upcall_info *,
198 uint32_t cutlen);
199
200const char *ovs_dp_name(const struct datapath *dp);
201struct sk_buff *ovs_vport_cmd_build_info(struct vport *, u32 pid, u32 seq,
202 u8 cmd);
203
204int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb,
205 const struct sw_flow_actions *, struct sw_flow_key *);
206
207void ovs_dp_notify_wq(struct work_struct *work);
208
209int action_fifos_init(void);
210void action_fifos_exit(void);
211
212
213#define OVS_MASKED(OLD, KEY, MASK) ((KEY) | ((OLD) & ~(MASK)))
214#define OVS_SET_MASKED(OLD, KEY, MASK) ((OLD) = OVS_MASKED(OLD, KEY, MASK))
215
216#define OVS_NLERR(logging_allowed, fmt, ...) \
217do { \
218 if (logging_allowed && net_ratelimit()) \
219 pr_info("netlink: " fmt "\n", ##__VA_ARGS__); \
220} while (0)
221#endif
222