2 * Copyright (c) 2010 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.
12 #include <linux/list.h>
13 #include <linux/skbuff.h>
14 #include <linux/spinlock.h>
17 #include "openvswitch/datapath-protocol.h"
22 /* The following definitions are for users of the vport subsytem: */
24 void vport_lock(void);
25 void vport_unlock(void);
28 void vport_exit(void);
30 int vport_add(const struct odp_vport_add __user *);
31 int vport_mod(const struct odp_vport_mod __user *);
32 int vport_del(const char __user *udevname);
34 int vport_stats_get(struct odp_vport_stats_req __user *);
35 int vport_ether_get(struct odp_vport_ether __user *);
36 int vport_ether_set(struct odp_vport_ether __user *);
37 int vport_mtu_get(struct odp_vport_mtu __user *);
38 int vport_mtu_set(struct odp_vport_mtu __user *);
40 struct vport *__vport_add(const char *name, const char *type, const void __user *config);
41 int __vport_mod(struct vport *, const void __user *config);
42 int __vport_del(struct vport *);
44 struct vport *vport_locate(const char *name);
46 int vport_attach(struct vport *, struct dp_port *);
47 int vport_detach(struct vport *);
49 int vport_set_mtu(struct vport *, int mtu);
50 int vport_set_addr(struct vport *, const unsigned char *);
52 const char *vport_get_name(const struct vport *);
53 const char *vport_get_type(const struct vport *);
54 const unsigned char *vport_get_addr(const struct vport *);
56 struct dp_port *vport_get_dp_port(const struct vport *);
58 struct kobject *vport_get_kobj(const struct vport *);
60 unsigned vport_get_flags(const struct vport *);
61 int vport_is_running(const struct vport *);
62 unsigned char vport_get_operstate(const struct vport *);
64 int vport_get_ifindex(const struct vport *);
65 int vport_get_iflink(const struct vport *);
67 int vport_get_mtu(const struct vport *);
69 int vport_send(struct vport *, struct sk_buff *);
71 /* The following definitions are for implementers of vport devices: */
73 struct vport_percpu_stats {
80 struct vport_err_stats {
94 struct hlist_node hash_node;
95 const struct vport_ops *ops;
96 struct dp_port *dp_port;
98 struct vport_percpu_stats *percpu_stats;
99 struct vport_err_stats err_stats;
102 #define VPORT_F_REQUIRED (1 << 0) /* If init fails, module loading fails. */
103 #define VPORT_F_GEN_STATS (1 << 1) /* Track stats at the generic layer. */
104 #define VPORT_F_TUN_ID (1 << 2) /* Sets OVS_CB(skb)->tun_id. */
107 * struct vport_ops - definition of a type of virtual port
109 * @type: Name of port type, such as "netdev" or "internal" to be matched
110 * against the device type when a new port needs to be created.
111 * @flags: Flags of type VPORT_F_* that influence how the generic vport layer
112 * handles this vport.
113 * @init: Called at module initialization. If VPORT_F_REQUIRED is set then the
114 * failure of this function will cause the module to not load. If the flag is
115 * not set and initialzation fails then no vports of this type can be created.
116 * @exit: Called at module unload.
117 * @create: Create a new vport called 'name' with vport type specific
118 * configuration 'config' (which must be copied from userspace before use). On
119 * success must allocate a new vport using vport_alloc().
120 * @modify: Modify the configuration of an existing vport. May be null if
121 * modification is not supported.
122 * @destroy: Destroy and free a vport using vport_free(). Prior to destruction
123 * @detach will be called followed by synchronize_rcu().
124 * @attach: Attach a previously created vport to a datapath. After attachment
125 * packets may be sent and received. Prior to attachment any packets may be
126 * silently discarded. May be null if not needed.
127 * @detach: Detach a vport from a datapath. May be null if not needed.
128 * @set_mtu: Set the device's MTU. May be null if not supported.
129 * @set_addr: Set the device's MAC address. May be null if not supported.
130 * @get_name: Get the device's name.
131 * @get_addr: Get the device's MAC address.
132 * @get_kobj: Get the kobj associated with the device (may return null).
133 * @get_stats: Fill in the transmit/receive stats. May be null if stats are
134 * not supported or if generic stats are in use. If defined overrides
136 * @get_dev_flags: Get the device's flags.
137 * @is_running: Checks whether the device is running.
138 * @get_operstate: Get the device's operating state.
139 * @get_ifindex: Get the system interface index associated with the device.
140 * May be null if the device does not have an ifindex.
141 * @get_iflink: Get the system interface index associated with the device that
142 * will be used to send packets (may be different than ifindex for tunnels).
143 * May be null if the device does not have an iflink.
144 * @get_mtu: Get the device's MTU.
145 * @send: Send a packet on the device. Returns the length of the packet sent.
151 /* Called at module init and exit respectively. */
155 /* Called with RTNL lock. */
156 struct vport *(*create)(const char *name, const void __user *config);
157 int (*modify)(struct vport *, const void __user *config);
158 int (*destroy)(struct vport *);
160 int (*attach)(struct vport *);
161 int (*detach)(struct vport *);
163 int (*set_mtu)(struct vport *, int mtu);
164 int (*set_addr)(struct vport *, const unsigned char *);
166 /* Called with rcu_read_lock or RTNL lock. */
167 const char *(*get_name)(const struct vport *);
168 const unsigned char *(*get_addr)(const struct vport *);
169 struct kobject *(*get_kobj)(const struct vport *);
170 int (*get_stats)(const struct vport *, struct odp_vport_stats *);
172 unsigned (*get_dev_flags)(const struct vport *);
173 int (*is_running)(const struct vport *);
174 unsigned char (*get_operstate)(const struct vport *);
176 int (*get_ifindex)(const struct vport *);
177 int (*get_iflink)(const struct vport *);
179 int (*get_mtu)(const struct vport *);
181 int (*send)(struct vport *, struct sk_buff *);
184 enum vport_err_type {
195 struct vport *vport_alloc(int priv_size, const struct vport_ops *);
196 void vport_free(struct vport *);
198 #define VPORT_ALIGN 8
201 * vport_priv - access private data area of vport
203 * @vport: vport to access
205 * If a nonzero size was passed in priv_size of vport_alloc() a private data
206 * area was allocated on creation. This allows that area to be accessed and
207 * used for any purpose needed by the vport implementer.
210 vport_priv(const struct vport *vport)
212 return (u8 *)vport + ALIGN(sizeof(struct vport), VPORT_ALIGN);
216 * vport_from_priv - lookup vport from private data pointer
218 * @priv: Start of private data area.
220 * It is sometimes useful to translate from a pointer to the private data
221 * area to the vport, such as in the case where the private data pointer is
222 * the result of a hash table lookup. @priv must point to the start of the
225 static inline struct vport *
226 vport_from_priv(const void *priv)
228 return (struct vport *)(priv - ALIGN(sizeof(struct vport), VPORT_ALIGN));
231 void vport_receive(struct vport *, struct sk_buff *);
232 void vport_record_error(struct vport *, enum vport_err_type err_type);
233 void vport_gen_ether_addr(u8 *addr);