2 * Copyright (c) 2009 Nicira Networks.
3 * Distributed under the terms of the GNU GPL version 2.
5 * Significant portions of this file may be copied from parts of the Linux
6 * kernel, by Linus Torvalds and others.
9 /* Interface exported by openvswitch_mod. */
15 #include <linux/kernel.h>
16 #include <linux/mutex.h>
17 #include <linux/netlink.h>
18 #include <linux/netdevice.h>
19 #include <linux/workqueue.h>
20 #include <linux/skbuff.h>
21 #include <linux/version.h>
25 /* Mask for the priority bits in a vlan header. If we ever merge upstream
26 * then this should go into include/linux/if_vlan.h. */
27 #define VLAN_PCP_MASK 0xe000
29 #define DP_MAX_PORTS 256
30 #define DP_MAX_GROUPS 16
32 #define DP_L2_BITS (PAGE_SHIFT - ilog2(sizeof(struct sw_flow*)))
33 #define DP_L2_SIZE (1 << DP_L2_BITS)
36 #define DP_L1_BITS (PAGE_SHIFT - ilog2(sizeof(struct sw_flow**)))
37 #define DP_L1_SIZE (1 << DP_L1_BITS)
38 #define DP_L1_SHIFT DP_L2_BITS
40 #define DP_MAX_BUCKETS (DP_L1_SIZE * DP_L2_SIZE)
43 unsigned int n_buckets;
44 struct sw_flow ***flows[2];
49 #define DP_MAX_QUEUE_LEN 100
51 struct dp_stats_percpu {
58 struct dp_port_group {
73 struct sk_buff_head queues[DP_N_QUEUES];
74 wait_queue_head_t waitqueue;
78 struct dp_table *table;
81 struct dp_port_group *groups[DP_MAX_GROUPS];
85 struct net_bridge_port *ports[DP_MAX_PORTS];
86 struct list_head port_list; /* All ports, including local_port. */
89 struct dp_stats_percpu *stats_percpu;
92 struct net_bridge_port {
95 struct net_device *dev;
97 char linkname[IFNAMSIZ];
98 struct list_head node; /* Element in datapath.ports. */
101 extern struct notifier_block dp_device_notifier;
102 extern int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd);
105 struct dp_table *dp_table_create(unsigned int n_buckets);
106 void dp_table_destroy(struct dp_table *, int free_flows);
107 struct sw_flow *dp_table_lookup(struct dp_table *, const struct odp_flow_key *);
108 struct sw_flow **dp_table_lookup_for_insert(struct dp_table *, const struct odp_flow_key *);
109 int dp_table_delete(struct dp_table *, struct sw_flow *);
110 int dp_table_expand(struct datapath *);
111 int dp_table_flush(struct datapath *);
112 int dp_table_foreach(struct dp_table *table,
113 int (*callback)(struct sw_flow *flow, void *aux),
116 void dp_process_received_packet(struct sk_buff *, struct net_bridge_port *);
117 int dp_del_port(struct net_bridge_port *);
118 int dp_output_control(struct datapath *, struct sk_buff *, int, u32 arg);
119 int dp_min_mtu(const struct datapath *dp);
121 struct datapath *get_dp(int dp_idx);
123 static inline const char *dp_name(const struct datapath *dp)
125 return dp->ports[ODPP_LOCAL]->dev->name;
129 int skb_checksum_setup(struct sk_buff *skb);
131 static inline int skb_checksum_setup(struct sk_buff *skb)
137 int vswitch_skb_checksum_setup(struct sk_buff *skb);
139 #endif /* datapath.h */