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"
18 #include "odp-compat.h"
23 /* The following definitions are for users of the vport subsytem: */
25 int vport_user_add(const struct odp_vport_add __user *);
26 int vport_user_mod(const struct odp_vport_mod __user *);
27 int vport_user_del(const char __user *udevname);
30 int compat_vport_user_add(struct compat_odp_vport_add __user *);
31 int compat_vport_user_mod(struct compat_odp_vport_mod __user *);
34 int vport_user_stats_get(struct odp_vport_stats_req __user *);
35 int vport_user_ether_get(struct odp_vport_ether __user *);
36 int vport_user_ether_set(struct odp_vport_ether __user *);
37 int vport_user_mtu_get(struct odp_vport_mtu __user *);
38 int vport_user_mtu_set(struct odp_vport_mtu __user *);
40 void vport_lock(void);
41 void vport_unlock(void);
44 void vport_exit(void);
46 struct vport *vport_add(const char *name, const char *type, const void __user *config);
47 int vport_mod(struct vport *, const void __user *config);
48 int vport_del(struct vport *);
50 struct vport *vport_locate(const char *name);
52 int vport_attach(struct vport *, struct dp_port *);
53 int vport_detach(struct vport *);
55 int vport_set_mtu(struct vport *, int mtu);
56 int vport_set_addr(struct vport *, const unsigned char *);
58 const char *vport_get_name(const struct vport *);
59 const char *vport_get_type(const struct vport *);
60 const unsigned char *vport_get_addr(const struct vport *);
62 struct dp_port *vport_get_dp_port(const struct vport *);
64 struct kobject *vport_get_kobj(const struct vport *);
66 unsigned vport_get_flags(const struct vport *);
67 int vport_is_running(const struct vport *);
68 unsigned char vport_get_operstate(const struct vport *);
70 int vport_get_ifindex(const struct vport *);
71 int vport_get_iflink(const struct vport *);
73 int vport_get_mtu(const struct vport *);
75 int vport_send(struct vport *, struct sk_buff *);
77 /* The following definitions are for implementers of vport devices: */
79 struct vport_percpu_stats {
86 struct vport_err_stats {
100 struct hlist_node hash_node;
101 const struct vport_ops *ops;
102 struct dp_port *dp_port;
104 struct vport_percpu_stats *percpu_stats;
105 struct vport_err_stats err_stats;
108 #define VPORT_F_REQUIRED (1 << 0) /* If init fails, module loading fails. */
109 #define VPORT_F_GEN_STATS (1 << 1) /* Track stats at the generic layer. */
110 #define VPORT_F_TUN_ID (1 << 2) /* Sets OVS_CB(skb)->tun_id. */
113 * struct vport_ops - definition of a type of virtual port
115 * @type: Name of port type, such as "netdev" or "internal" to be matched
116 * against the device type when a new port needs to be created.
117 * @flags: Flags of type VPORT_F_* that influence how the generic vport layer
118 * handles this vport.
119 * @init: Called at module initialization. If VPORT_F_REQUIRED is set then the
120 * failure of this function will cause the module to not load. If the flag is
121 * not set and initialzation fails then no vports of this type can be created.
122 * @exit: Called at module unload.
123 * @create: Create a new vport called 'name' with vport type specific
124 * configuration 'config' (which must be copied from userspace before use). On
125 * success must allocate a new vport using vport_alloc().
126 * @modify: Modify the configuration of an existing vport. May be null if
127 * modification is not supported.
128 * @destroy: Destroy and free a vport using vport_free(). Prior to destruction
129 * @detach will be called followed by synchronize_rcu().
130 * @attach: Attach a previously created vport to a datapath. After attachment
131 * packets may be sent and received. Prior to attachment any packets may be
132 * silently discarded. May be null if not needed.
133 * @detach: Detach a vport from a datapath. May be null if not needed.
134 * @set_mtu: Set the device's MTU. May be null if not supported.
135 * @set_addr: Set the device's MAC address. May be null if not supported.
136 * @get_name: Get the device's name.
137 * @get_addr: Get the device's MAC address.
138 * @get_kobj: Get the kobj associated with the device (may return null).
139 * @get_stats: Fill in the transmit/receive stats. May be null if stats are
140 * not supported or if generic stats are in use. If defined overrides
142 * @get_dev_flags: Get the device's flags.
143 * @is_running: Checks whether the device is running.
144 * @get_operstate: Get the device's operating state.
145 * @get_ifindex: Get the system interface index associated with the device.
146 * May be null if the device does not have an ifindex.
147 * @get_iflink: Get the system interface index associated with the device that
148 * will be used to send packets (may be different than ifindex for tunnels).
149 * May be null if the device does not have an iflink.
150 * @get_mtu: Get the device's MTU.
151 * @send: Send a packet on the device. Returns the length of the packet sent.
157 /* Called at module init and exit respectively. */
161 /* Called with RTNL lock. */
162 struct vport *(*create)(const char *name, const void __user *config);
163 int (*modify)(struct vport *, const void __user *config);
164 int (*destroy)(struct vport *);
166 int (*attach)(struct vport *);
167 int (*detach)(struct vport *);
169 int (*set_mtu)(struct vport *, int mtu);
170 int (*set_addr)(struct vport *, const unsigned char *);
172 /* Called with rcu_read_lock or RTNL lock. */
173 const char *(*get_name)(const struct vport *);
174 const unsigned char *(*get_addr)(const struct vport *);
175 struct kobject *(*get_kobj)(const struct vport *);
176 int (*get_stats)(const struct vport *, struct odp_vport_stats *);
178 unsigned (*get_dev_flags)(const struct vport *);
179 int (*is_running)(const struct vport *);
180 unsigned char (*get_operstate)(const struct vport *);
182 int (*get_ifindex)(const struct vport *);
183 int (*get_iflink)(const struct vport *);
185 int (*get_mtu)(const struct vport *);
187 int (*send)(struct vport *, struct sk_buff *);
190 enum vport_err_type {
201 struct vport *vport_alloc(int priv_size, const struct vport_ops *);
202 void vport_free(struct vport *);
204 #define VPORT_ALIGN 8
207 * vport_priv - access private data area of vport
209 * @vport: vport to access
211 * If a nonzero size was passed in priv_size of vport_alloc() a private data
212 * area was allocated on creation. This allows that area to be accessed and
213 * used for any purpose needed by the vport implementer.
216 vport_priv(const struct vport *vport)
218 return (u8 *)vport + ALIGN(sizeof(struct vport), VPORT_ALIGN);
222 * vport_from_priv - lookup vport from private data pointer
224 * @priv: Start of private data area.
226 * It is sometimes useful to translate from a pointer to the private data
227 * area to the vport, such as in the case where the private data pointer is
228 * the result of a hash table lookup. @priv must point to the start of the
231 static inline struct vport *
232 vport_from_priv(const void *priv)
234 return (struct vport *)(priv - ALIGN(sizeof(struct vport), VPORT_ALIGN));
237 void vport_receive(struct vport *, struct sk_buff *);
238 void vport_record_error(struct vport *, enum vport_err_type err_type);