204 lines
6.2 KiB
C
204 lines
6.2 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2007-2012 Nicira, Inc.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of version 2 of the GNU General Public
|
||
|
|
* License as published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful, but
|
||
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
* General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
||
|
|
* 02110-1301, USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef VPORT_H
|
||
|
|
#define VPORT_H 1
|
||
|
|
|
||
|
|
#include <linux/if_tunnel.h>
|
||
|
|
#include <linux/list.h>
|
||
|
|
#include <linux/netlink.h>
|
||
|
|
#include <linux/openvswitch.h>
|
||
|
|
#include <linux/reciprocal_div.h>
|
||
|
|
#include <linux/skbuff.h>
|
||
|
|
#include <linux/spinlock.h>
|
||
|
|
#include <linux/u64_stats_sync.h>
|
||
|
|
|
||
|
|
#include "datapath.h"
|
||
|
|
|
||
|
|
struct vport;
|
||
|
|
struct vport_parms;
|
||
|
|
|
||
|
|
/* The following definitions are for users of the vport subsytem: */
|
||
|
|
|
||
|
|
int ovs_vport_init(void);
|
||
|
|
void ovs_vport_exit(void);
|
||
|
|
|
||
|
|
struct vport *ovs_vport_add(const struct vport_parms *);
|
||
|
|
void ovs_vport_del(struct vport *);
|
||
|
|
|
||
|
|
struct vport *ovs_vport_locate(const struct net *net, const char *name);
|
||
|
|
|
||
|
|
void ovs_vport_get_stats(struct vport *, struct ovs_vport_stats *);
|
||
|
|
|
||
|
|
int ovs_vport_set_options(struct vport *, struct nlattr *options);
|
||
|
|
int ovs_vport_get_options(const struct vport *, struct sk_buff *);
|
||
|
|
|
||
|
|
int ovs_vport_set_upcall_portids(struct vport *, const struct nlattr *pids);
|
||
|
|
int ovs_vport_get_upcall_portids(const struct vport *, struct sk_buff *);
|
||
|
|
u32 ovs_vport_find_upcall_portid(const struct vport *, struct sk_buff *);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct vport_portids - array of netlink portids of a vport.
|
||
|
|
* must be protected by rcu.
|
||
|
|
* @rn_ids: The reciprocal value of @n_ids.
|
||
|
|
* @rcu: RCU callback head for deferred destruction.
|
||
|
|
* @n_ids: Size of @ids array.
|
||
|
|
* @ids: Array storing the Netlink socket pids to be used for packets received
|
||
|
|
* on this port that miss the flow table.
|
||
|
|
*/
|
||
|
|
struct vport_portids {
|
||
|
|
struct reciprocal_value rn_ids;
|
||
|
|
struct rcu_head rcu;
|
||
|
|
u32 n_ids;
|
||
|
|
u32 ids[];
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct vport - one port within a datapath
|
||
|
|
* @dev: Pointer to net_device.
|
||
|
|
* @dp: Datapath to which this port belongs.
|
||
|
|
* @upcall_portids: RCU protected 'struct vport_portids'.
|
||
|
|
* @port_no: Index into @dp's @ports array.
|
||
|
|
* @hash_node: Element in @dev_table hash table in vport.c.
|
||
|
|
* @dp_hash_node: Element in @datapath->ports hash table in datapath.c.
|
||
|
|
* @ops: Class structure.
|
||
|
|
* @detach_list: list used for detaching vport in net-exit call.
|
||
|
|
* @rcu: RCU callback head for deferred destruction.
|
||
|
|
*/
|
||
|
|
struct vport {
|
||
|
|
struct net_device *dev;
|
||
|
|
struct datapath *dp;
|
||
|
|
struct vport_portids __rcu *upcall_portids;
|
||
|
|
u16 port_no;
|
||
|
|
|
||
|
|
struct hlist_node hash_node;
|
||
|
|
struct hlist_node dp_hash_node;
|
||
|
|
const struct vport_ops *ops;
|
||
|
|
|
||
|
|
struct list_head detach_list;
|
||
|
|
struct rcu_head rcu;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct vport_parms - parameters for creating a new vport
|
||
|
|
*
|
||
|
|
* @name: New vport's name.
|
||
|
|
* @type: New vport's type.
|
||
|
|
* @options: %OVS_VPORT_ATTR_OPTIONS attribute from Netlink message, %NULL if
|
||
|
|
* none was supplied.
|
||
|
|
* @dp: New vport's datapath.
|
||
|
|
* @port_no: New vport's port number.
|
||
|
|
*/
|
||
|
|
struct vport_parms {
|
||
|
|
const char *name;
|
||
|
|
enum ovs_vport_type type;
|
||
|
|
struct nlattr *options;
|
||
|
|
|
||
|
|
/* For ovs_vport_alloc(). */
|
||
|
|
struct datapath *dp;
|
||
|
|
u16 port_no;
|
||
|
|
struct nlattr *upcall_portids;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct vport_ops - definition of a type of virtual port
|
||
|
|
*
|
||
|
|
* @type: %OVS_VPORT_TYPE_* value for this type of virtual port.
|
||
|
|
* @create: Create a new vport configured as specified. On success returns
|
||
|
|
* a new vport allocated with ovs_vport_alloc(), otherwise an ERR_PTR() value.
|
||
|
|
* @destroy: Destroys a vport. Must call vport_free() on the vport but not
|
||
|
|
* before an RCU grace period has elapsed.
|
||
|
|
* @set_options: Modify the configuration of an existing vport. May be %NULL
|
||
|
|
* if modification is not supported.
|
||
|
|
* @get_options: Appends vport-specific attributes for the configuration of an
|
||
|
|
* existing vport to a &struct sk_buff. May be %NULL for a vport that does not
|
||
|
|
* have any configuration.
|
||
|
|
* @send: Send a packet on the device.
|
||
|
|
* zero for dropped packets or negative for error.
|
||
|
|
*/
|
||
|
|
struct vport_ops {
|
||
|
|
enum ovs_vport_type type;
|
||
|
|
|
||
|
|
/* Called with ovs_mutex. */
|
||
|
|
struct vport *(*create)(const struct vport_parms *);
|
||
|
|
void (*destroy)(struct vport *);
|
||
|
|
|
||
|
|
int (*set_options)(struct vport *, struct nlattr *);
|
||
|
|
int (*get_options)(const struct vport *, struct sk_buff *);
|
||
|
|
|
||
|
|
netdev_tx_t (*send) (struct sk_buff *skb);
|
||
|
|
struct module *owner;
|
||
|
|
struct list_head list;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *,
|
||
|
|
const struct vport_parms *);
|
||
|
|
void ovs_vport_free(struct vport *);
|
||
|
|
void ovs_vport_deferred_free(struct vport *vport);
|
||
|
|
|
||
|
|
#define VPORT_ALIGN 8
|
||
|
|
|
||
|
|
/**
|
||
|
|
* vport_priv - access private data area of vport
|
||
|
|
*
|
||
|
|
* @vport: vport to access
|
||
|
|
*
|
||
|
|
* If a nonzero size was passed in priv_size of vport_alloc() a private data
|
||
|
|
* area was allocated on creation. This allows that area to be accessed and
|
||
|
|
* used for any purpose needed by the vport implementer.
|
||
|
|
*/
|
||
|
|
static inline void *vport_priv(const struct vport *vport)
|
||
|
|
{
|
||
|
|
return (u8 *)(uintptr_t)vport + ALIGN(sizeof(struct vport), VPORT_ALIGN);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* vport_from_priv - lookup vport from private data pointer
|
||
|
|
*
|
||
|
|
* @priv: Start of private data area.
|
||
|
|
*
|
||
|
|
* It is sometimes useful to translate from a pointer to the private data
|
||
|
|
* area to the vport, such as in the case where the private data pointer is
|
||
|
|
* the result of a hash table lookup. @priv must point to the start of the
|
||
|
|
* private data area.
|
||
|
|
*/
|
||
|
|
static inline struct vport *vport_from_priv(void *priv)
|
||
|
|
{
|
||
|
|
return (struct vport *)((u8 *)priv - ALIGN(sizeof(struct vport), VPORT_ALIGN));
|
||
|
|
}
|
||
|
|
|
||
|
|
int ovs_vport_receive(struct vport *, struct sk_buff *,
|
||
|
|
const struct ip_tunnel_info *);
|
||
|
|
|
||
|
|
static inline const char *ovs_vport_name(struct vport *vport)
|
||
|
|
{
|
||
|
|
return vport->dev->name;
|
||
|
|
}
|
||
|
|
|
||
|
|
int __ovs_vport_ops_register(struct vport_ops *ops);
|
||
|
|
#define ovs_vport_ops_register(ops) \
|
||
|
|
({ \
|
||
|
|
(ops)->owner = THIS_MODULE; \
|
||
|
|
__ovs_vport_ops_register(ops); \
|
||
|
|
})
|
||
|
|
|
||
|
|
void ovs_vport_ops_unregister(struct vport_ops *ops);
|
||
|
|
void ovs_vport_send(struct vport *vport, struct sk_buff *skb);
|
||
|
|
|
||
|
|
#endif /* vport.h */
|