1 /* Interface exported by OpenFlow module. */
6 #include <linux/kernel.h>
7 #include <linux/mutex.h>
8 #include <linux/netlink.h>
9 #include <linux/netdevice.h>
10 #include <linux/workqueue.h>
11 #include <linux/skbuff.h>
12 #include "openflow/openflow.h"
13 #include "openflow/nicira-ext.h"
17 #define NL_FLOWS_PER_MESSAGE 100
22 #define dprintk(x...) printk(x)
25 /* Capabilities supported by this implementation. */
26 #define OFP_SUPPORTED_CAPABILITIES ( OFPC_FLOW_STATS \
31 /* Actions supported by this implementation. */
32 #define OFP_SUPPORTED_ACTIONS ( (1 << OFPAT_OUTPUT) \
33 | (1 << OFPAT_SET_VLAN_VID) \
34 | (1 << OFPAT_SET_VLAN_PCP) \
35 | (1 << OFPAT_STRIP_VLAN) \
36 | (1 << OFPAT_SET_DL_SRC) \
37 | (1 << OFPAT_SET_DL_DST) \
38 | (1 << OFPAT_SET_NW_SRC) \
39 | (1 << OFPAT_SET_NW_DST) \
40 | (1 << OFPAT_SET_TP_SRC) \
41 | (1 << OFPAT_SET_TP_DST) )
45 #define DP_MAX_PORTS 255
50 struct timer_list timer; /* Expiration timer. */
51 struct sw_chain *chain; /* Forwarding rules. */
52 struct task_struct *dp_task; /* Kernel thread for maintenance. */
54 /* Data related to the "of" device of this datapath */
55 struct net_device *netdev;
57 /* Configuration set from controller */
59 uint16_t miss_send_len;
61 /* Flag controlling whether Flow End messages are generated. */
62 uint8_t send_flow_end;
65 struct net_bridge_port *ports[DP_MAX_PORTS];
66 struct net_bridge_port *local_port; /* OFPP_LOCAL port. */
67 struct list_head port_list; /* All ports, including local_port. */
70 /* Information necessary to reply to the sender of an OpenFlow message. */
72 uint32_t xid; /* OpenFlow transaction ID of request. */
73 uint32_t pid; /* Netlink process ID of sending socket. */
74 uint32_t seq; /* Netlink sequence ID of request. */
77 struct net_bridge_port {
79 u32 config; /* Some subset of OFPPC_* flags. */
80 u32 state; /* Some subset of OFPPS_* flags. */
82 struct work_struct port_task;
84 struct net_device *dev;
85 struct snat_conf *snat; /* Only set if SNAT is configured for this port. */
86 struct list_head node; /* Element in datapath.ports. */
89 extern struct mutex dp_mutex;
90 extern struct notifier_block dp_device_notifier;
92 int dp_del_switch_port(struct net_bridge_port *);
93 int dp_xmit_skb(struct sk_buff *skb);
94 int dp_output_port(struct datapath *, struct sk_buff *, int out_port,
96 int dp_output_control(struct datapath *, struct sk_buff *, uint32_t,
98 void dp_set_origin(struct datapath *, uint16_t, struct sk_buff *);
99 int dp_send_features_reply(struct datapath *, const struct sender *);
100 int dp_send_config_reply(struct datapath *, const struct sender *);
101 int dp_send_port_status(struct net_bridge_port *p, uint8_t status);
102 int dp_send_flow_end(struct datapath *, struct sw_flow *,
103 enum nx_flow_end_reason);
104 int dp_send_error_msg(struct datapath *, const struct sender *,
105 uint16_t, uint16_t, const void *, size_t);
106 int dp_update_port_flags(struct datapath *dp, const struct ofp_port_mod *opm);
107 int dp_send_echo_reply(struct datapath *, const struct sender *,
108 const struct ofp_header *);
109 int dp_send_hello(struct datapath *, const struct sender *,
110 const struct ofp_header *);
112 /* Should hold at least RCU read lock when calling */
113 struct datapath *dp_get(int dp_idx);
115 #endif /* datapath.h */