1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/* Interface exported by openvswitch_mod. */
#ifndef DATAPATH_H
#define DATAPATH_H 1
#include <asm/page.h>
#include <linux/kernel.h>
#include <linux/mutex.h>
#include <linux/netlink.h>
#include <linux/netdevice.h>
#include <linux/workqueue.h>
#include <linux/skbuff.h>
#include "flow.h"
#include "brc_sysfs.h"
struct sk_buff;
/* Mask for the priority bits in a vlan header. If we ever merge upstream
* then this should go into include/linux/if_vlan.h. */
#define VLAN_PCP_MASK 0xe000
#define DP_MAX_PORTS 256
#define DP_MAX_GROUPS 16
#define DP_L2_BITS (PAGE_SHIFT - ilog2(sizeof(struct sw_flow*)))
#define DP_L2_SIZE (1 << DP_L2_BITS)
#define DP_L2_SHIFT 0
#define DP_L1_BITS (PAGE_SHIFT - ilog2(sizeof(struct sw_flow**)))
#define DP_L1_SIZE (1 << DP_L1_BITS)
#define DP_L1_SHIFT DP_L2_BITS
#define DP_MAX_BUCKETS (DP_L1_SIZE * DP_L2_SIZE)
struct dp_table {
unsigned int n_buckets;
struct sw_flow ***flows[2];
struct rcu_head rcu;
};
#define DP_N_QUEUES 2
#define DP_MAX_QUEUE_LEN 100
struct dp_stats_percpu {
u64 n_frags;
u64 n_hit;
u64 n_missed;
u64 n_lost;
};
struct dp_port_group {
struct rcu_head rcu;
int n_ports;
u16 ports[];
};
struct datapath {
struct mutex mutex;
int dp_idx;
#ifdef SUPPORT_SYSFS
struct kobject ifobj;
#endif
int drop_frags;
/* Queued data. */
struct sk_buff_head queues[DP_N_QUEUES];
wait_queue_head_t waitqueue;
/* Flow table. */
unsigned int n_flows;
struct dp_table *table;
/* Port groups. */
struct dp_port_group *groups[DP_MAX_GROUPS];
/* Switch ports. */
unsigned int n_ports;
struct net_bridge_port *ports[DP_MAX_PORTS];
struct list_head port_list; /* All ports, including local_port. */
/* Stats. */
struct dp_stats_percpu *stats_percpu;
};
struct net_bridge_port {
u16 port_no;
struct datapath *dp;
struct net_device *dev;
#ifdef SUPPORT_SYSFS
struct kobject kobj;
#endif
struct list_head node; /* Element in datapath.ports. */
};
extern struct notifier_block dp_device_notifier;
extern int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd);
extern int (*dp_add_dp_hook)(struct datapath *dp);
extern int (*dp_del_dp_hook)(struct datapath *dp);
extern int (*dp_add_if_hook)(struct net_bridge_port *p);
extern int (*dp_del_if_hook)(struct net_bridge_port *p);
/* Flow table. */
struct dp_table *dp_table_create(unsigned int n_buckets);
void dp_table_destroy(struct dp_table *, int free_flows);
struct sw_flow *dp_table_lookup(struct dp_table *, const struct odp_flow_key *);
struct sw_flow **dp_table_lookup_for_insert(struct dp_table *, const struct odp_flow_key *);
int dp_table_delete(struct dp_table *, struct sw_flow *);
int dp_table_expand(struct datapath *);
int dp_table_flush(struct datapath *);
int dp_table_foreach(struct dp_table *table,
int (*callback)(struct sw_flow *flow, void *aux),
void *aux);
void dp_process_received_packet(struct sk_buff *, struct net_bridge_port *);
int dp_del_port(struct net_bridge_port *, struct list_head *);
int dp_output_port(struct datapath *, struct sk_buff *, int out_port,
int ignore_no_fwd);
int dp_output_control(struct datapath *, struct sk_buff *, int, u32 arg);
void dp_set_origin(struct datapath *, u16, struct sk_buff *);
struct datapath *get_dp(int dp_idx);
static inline const char *dp_name(const struct datapath *dp)
{
return dp->ports[ODPP_LOCAL]->dev->name;
}
#ifdef CONFIG_XEN
int skb_checksum_setup(struct sk_buff *skb);
#else
static inline int skb_checksum_setup(struct sk_buff *skb)
{
return 0;
}
#endif
#endif /* datapath.h */
|
