1
2
3
4
5
6#ifndef DATAPATH_H
7#define DATAPATH_H 1
8
9#include <asm/page.h>
10#include <linux/kernel.h>
11#include <linux/mutex.h>
12#include <linux/netdevice.h>
13#include <linux/skbuff.h>
14#include <linux/u64_stats_sync.h>
15#include <net/ip_tunnels.h>
16
17#include "conntrack.h"
18#include "flow.h"
19#include "flow_table.h"
20#include "meter.h"
21#include "vport-internal_dev.h"
22
23#define DP_MAX_PORTS USHRT_MAX
24#define DP_VPORT_HASH_BUCKETS 1024
25#define DP_MASKS_REBALANCE_INTERVAL 4000
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44struct dp_stats_percpu {
45 u64 n_hit;
46 u64 n_missed;
47 u64 n_lost;
48 u64 n_mask_hit;
49 u64 n_cache_hit;
50 struct u64_stats_sync syncp;
51};
52
53
54
55
56
57
58
59
60
61
62struct dp_nlsk_pids {
63 struct rcu_head rcu;
64 u32 n_pids;
65 u32 pids[];
66};
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84struct datapath {
85 struct rcu_head rcu;
86 struct list_head list_node;
87
88
89 struct flow_table table;
90
91
92 struct hlist_head *ports;
93
94
95 struct dp_stats_percpu __percpu *stats_percpu;
96
97
98 possible_net_t net;
99
100 u32 user_features;
101
102 u32 max_headroom;
103
104
105 struct dp_meter_table meter_tbl;
106
107 struct dp_nlsk_pids __rcu *upcall_portids;
108};
109
110
111
112
113
114
115
116
117
118
119struct ovs_skb_cb {
120 struct vport *input_vport;
121 u16 mru;
122 u16 acts_origlen;
123 u32 cutlen;
124};
125#define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb)
126
127
128
129
130
131
132
133
134
135
136
137
138struct dp_upcall_info {
139 struct ip_tunnel_info *egress_tun_info;
140 const struct nlattr *userdata;
141 const struct nlattr *actions;
142 int actions_len;
143 u32 portid;
144 u8 cmd;
145 u16 mru;
146};
147
148
149
150
151
152
153struct ovs_net {
154 struct list_head dps;
155 struct work_struct dp_notify_work;
156 struct delayed_work masks_rebalance;
157#if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT)
158 struct ovs_ct_limit_info *ct_limit_info;
159#endif
160
161
162 bool xt_label;
163};
164
165
166
167
168
169
170
171
172enum ovs_pkt_hash_types {
173 OVS_PACKET_HASH_SW_BIT = (1ULL << 32),
174 OVS_PACKET_HASH_L4_BIT = (1ULL << 33),
175};
176
177extern unsigned int ovs_net_id;
178void ovs_lock(void);
179void ovs_unlock(void);
180
181#ifdef CONFIG_LOCKDEP
182int lockdep_ovsl_is_held(void);
183#else
184#define lockdep_ovsl_is_held() 1
185#endif
186
187#define ASSERT_OVSL() WARN_ON(!lockdep_ovsl_is_held())
188#define ovsl_dereference(p) \
189 rcu_dereference_protected(p, lockdep_ovsl_is_held())
190#define rcu_dereference_ovsl(p) \
191 rcu_dereference_check(p, lockdep_ovsl_is_held())
192
193static inline struct net *ovs_dp_get_net(const struct datapath *dp)
194{
195 return read_pnet(&dp->net);
196}
197
198static inline void ovs_dp_set_net(struct datapath *dp, struct net *net)
199{
200 write_pnet(&dp->net, net);
201}
202
203struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no);
204
205static inline struct vport *ovs_vport_rcu(const struct datapath *dp, int port_no)
206{
207 WARN_ON_ONCE(!rcu_read_lock_held());
208 return ovs_lookup_vport(dp, port_no);
209}
210
211static inline struct vport *ovs_vport_ovsl_rcu(const struct datapath *dp, int port_no)
212{
213 WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held());
214 return ovs_lookup_vport(dp, port_no);
215}
216
217static inline struct vport *ovs_vport_ovsl(const struct datapath *dp, int port_no)
218{
219 ASSERT_OVSL();
220 return ovs_lookup_vport(dp, port_no);
221}
222
223
224static inline struct datapath *get_dp_rcu(struct net *net, int dp_ifindex)
225{
226 struct net_device *dev = dev_get_by_index_rcu(net, dp_ifindex);
227
228 if (dev) {
229 struct vport *vport = ovs_internal_dev_get_vport(dev);
230
231 if (vport)
232 return vport->dp;
233 }
234
235 return NULL;
236}
237
238
239
240
241static inline struct datapath *get_dp(struct net *net, int dp_ifindex)
242{
243 struct datapath *dp;
244
245 WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held());
246 rcu_read_lock();
247 dp = get_dp_rcu(net, dp_ifindex);
248 rcu_read_unlock();
249
250 return dp;
251}
252
253extern struct notifier_block ovs_dp_device_notifier;
254extern struct genl_family dp_vport_genl_family;
255
256DECLARE_STATIC_KEY_FALSE(tc_recirc_sharing_support);
257
258void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key);
259void ovs_dp_detach_port(struct vport *);
260int ovs_dp_upcall(struct datapath *, struct sk_buff *,
261 const struct sw_flow_key *, const struct dp_upcall_info *,
262 uint32_t cutlen);
263
264u32 ovs_dp_get_upcall_portid(const struct datapath *dp, uint32_t cpu_id);
265
266const char *ovs_dp_name(const struct datapath *dp);
267struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net,
268 u32 portid, u32 seq, u8 cmd);
269
270int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb,
271 const struct sw_flow_actions *, struct sw_flow_key *);
272
273void ovs_dp_notify_wq(struct work_struct *work);
274
275int action_fifos_init(void);
276void action_fifos_exit(void);
277
278
279#define OVS_MASKED(OLD, KEY, MASK) ((KEY) | ((OLD) & ~(MASK)))
280#define OVS_SET_MASKED(OLD, KEY, MASK) ((OLD) = OVS_MASKED(OLD, KEY, MASK))
281
282#define OVS_NLERR(logging_allowed, fmt, ...) \
283do { \
284 if (logging_allowed && net_ratelimit()) \
285 pr_info("netlink: " fmt "\n", ##__VA_ARGS__); \
286} while (0)
287#endif
288