1/* SPDX-License-Identifier: GPL-2.0-only */
  2/*
  3 * Copyright (c) 2007-2012 Nicira, Inc.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  4 */
  5
  6#ifndef VPORT_H
  7#define VPORT_H 1
  8
  9#include <linux/if_tunnel.h>
 10#include <linux/list.h>
 11#include <linux/netlink.h>
 12#include <linux/openvswitch.h>
 13#include <linux/reciprocal_div.h>
 14#include <linux/skbuff.h>
 15#include <linux/spinlock.h>
 16#include <linux/u64_stats_sync.h>
 17
 18#include "datapath.h"
 19
 20struct vport;
 21struct vport_parms;
 22
 23/* The following definitions are for users of the vport subsystem: */
 
 
 
 
 
 24
 25int ovs_vport_init(void);
 26void ovs_vport_exit(void);
 27
 28struct vport *ovs_vport_add(const struct vport_parms *);
 29void ovs_vport_del(struct vport *);
 30
 31struct vport *ovs_vport_locate(const struct net *net, const char *name);
 32
 33void ovs_vport_get_stats(struct vport *, struct ovs_vport_stats *);
 34
 35int ovs_vport_set_options(struct vport *, struct nlattr *options);
 36int ovs_vport_get_options(const struct vport *, struct sk_buff *);
 37
 38int ovs_vport_set_upcall_portids(struct vport *, const struct nlattr *pids);
 39int ovs_vport_get_upcall_portids(const struct vport *, struct sk_buff *);
 40u32 ovs_vport_find_upcall_portid(const struct vport *, struct sk_buff *);
 41
 42/**
 43 * struct vport_portids - array of netlink portids of a vport.
 44 *                        must be protected by rcu.
 45 * @rn_ids: The reciprocal value of @n_ids.
 46 * @rcu: RCU callback head for deferred destruction.
 47 * @n_ids: Size of @ids array.
 48 * @ids: Array storing the Netlink socket pids to be used for packets received
 49 * on this port that miss the flow table.
 50 */
 51struct vport_portids {
 52	struct reciprocal_value rn_ids;
 53	struct rcu_head rcu;
 54	u32 n_ids;
 55	u32 ids[];
 56};
 57
 58/**
 59 * struct vport - one port within a datapath
 60 * @dev: Pointer to net_device.
 61 * @dp: Datapath to which this port belongs.
 62 * @upcall_portids: RCU protected 'struct vport_portids'.
 
 63 * @port_no: Index into @dp's @ports array.
 64 * @hash_node: Element in @dev_table hash table in vport.c.
 65 * @dp_hash_node: Element in @datapath->ports hash table in datapath.c.
 66 * @ops: Class structure.
 67 * @detach_list: list used for detaching vport in net-exit call.
 68 * @rcu: RCU callback head for deferred destruction.
 
 69 */
 70struct vport {
 71	struct net_device *dev;
 72	struct datapath	*dp;
 73	struct vport_portids __rcu *upcall_portids;
 74	u16 port_no;
 75
 76	struct hlist_node hash_node;
 77	struct hlist_node dp_hash_node;
 78	const struct vport_ops *ops;
 79
 80	struct list_head detach_list;
 81	struct rcu_head rcu;
 
 
 82};
 83
 84/**
 85 * struct vport_parms - parameters for creating a new vport
 86 *
 87 * @name: New vport's name.
 88 * @type: New vport's type.
 89 * @options: %OVS_VPORT_ATTR_OPTIONS attribute from Netlink message, %NULL if
 90 * none was supplied.
 91 * @dp: New vport's datapath.
 92 * @port_no: New vport's port number.
 93 */
 94struct vport_parms {
 95	const char *name;
 96	enum ovs_vport_type type;
 97	struct nlattr *options;
 98
 99	/* For ovs_vport_alloc(). */
100	struct datapath *dp;
101	u16 port_no;
102	struct nlattr *upcall_portids;
103};
104
105/**
106 * struct vport_ops - definition of a type of virtual port
107 *
108 * @type: %OVS_VPORT_TYPE_* value for this type of virtual port.
109 * @create: Create a new vport configured as specified.  On success returns
110 * a new vport allocated with ovs_vport_alloc(), otherwise an ERR_PTR() value.
111 * @destroy: Destroys a vport.  Must call vport_free() on the vport but not
112 * before an RCU grace period has elapsed.
113 * @set_options: Modify the configuration of an existing vport.  May be %NULL
114 * if modification is not supported.
115 * @get_options: Appends vport-specific attributes for the configuration of an
116 * existing vport to a &struct sk_buff.  May be %NULL for a vport that does not
117 * have any configuration.
118 * @send: Send a packet on the device.
 
119 * zero for dropped packets or negative for error.
120 */
121struct vport_ops {
122	enum ovs_vport_type type;
123
124	/* Called with ovs_mutex. */
125	struct vport *(*create)(const struct vport_parms *);
126	void (*destroy)(struct vport *);
127
128	int (*set_options)(struct vport *, struct nlattr *);
129	int (*get_options)(const struct vport *, struct sk_buff *);
130
131	netdev_tx_t (*send) (struct sk_buff *skb);
132	struct module *owner;
133	struct list_head list;
 
 
 
 
 
 
 
 
134};
135
136struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *,
137			      const struct vport_parms *);
138void ovs_vport_free(struct vport *);
 
139
140#define VPORT_ALIGN 8
141
142/**
143 *	vport_priv - access private data area of vport
144 *
145 * @vport: vport to access
146 *
147 * If a nonzero size was passed in priv_size of vport_alloc() a private data
148 * area was allocated on creation.  This allows that area to be accessed and
149 * used for any purpose needed by the vport implementer.
150 */
151static inline void *vport_priv(const struct vport *vport)
152{
153	return (u8 *)(uintptr_t)vport + ALIGN(sizeof(struct vport), VPORT_ALIGN);
154}
155
156/**
157 *	vport_from_priv - lookup vport from private data pointer
158 *
159 * @priv: Start of private data area.
160 *
161 * It is sometimes useful to translate from a pointer to the private data
162 * area to the vport, such as in the case where the private data pointer is
163 * the result of a hash table lookup.  @priv must point to the start of the
164 * private data area.
165 */
166static inline struct vport *vport_from_priv(void *priv)
167{
168	return (struct vport *)((u8 *)priv - ALIGN(sizeof(struct vport), VPORT_ALIGN));
169}
170
171int ovs_vport_receive(struct vport *, struct sk_buff *,
172		      const struct ip_tunnel_info *);
 
 
 
 
 
 
 
173
174static inline const char *ovs_vport_name(struct vport *vport)
 
175{
176	return vport->dev->name;
 
177}
178
179int __ovs_vport_ops_register(struct vport_ops *ops);
180#define ovs_vport_ops_register(ops)		\
181	({					\
182		(ops)->owner = THIS_MODULE;	\
183		__ovs_vport_ops_register(ops);	\
184	})
185
186void ovs_vport_ops_unregister(struct vport_ops *ops);
187void ovs_vport_send(struct vport *vport, struct sk_buff *skb, u8 mac_proto);
188
189#endif /* vport.h */

 
  1/*
  2 * Copyright (c) 2007-2012 Nicira, Inc.
  3 *
  4 * This program is free software; you can redistribute it and/or
  5 * modify it under the terms of version 2 of the GNU General Public
  6 * License as published by the Free Software Foundation.
  7 *
  8 * This program is distributed in the hope that it will be useful, but
  9 * WITHOUT ANY WARRANTY; without even the implied warranty of
 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 11 * General Public License for more details.
 12 *
 13 * You should have received a copy of the GNU General Public License
 14 * along with this program; if not, write to the Free Software
 15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 16 * 02110-1301, USA
 17 */
 18
 19#ifndef VPORT_H
 20#define VPORT_H 1
 21
 22#include <linux/if_tunnel.h>
 23#include <linux/list.h>
 24#include <linux/netlink.h>
 25#include <linux/openvswitch.h>
 
 26#include <linux/skbuff.h>
 27#include <linux/spinlock.h>
 28#include <linux/u64_stats_sync.h>
 29
 30#include "datapath.h"
 31
 32struct vport;
 33struct vport_parms;
 34
 35/* The following definitions are for users of the vport subsytem: */
 36
 37/* The following definitions are for users of the vport subsytem: */
 38struct vport_net {
 39	struct vport __rcu *gre_vport;
 40};
 41
 42int ovs_vport_init(void);
 43void ovs_vport_exit(void);
 44
 45struct vport *ovs_vport_add(const struct vport_parms *);
 46void ovs_vport_del(struct vport *);
 47
 48struct vport *ovs_vport_locate(struct net *net, const char *name);
 49
 50void ovs_vport_get_stats(struct vport *, struct ovs_vport_stats *);
 51
 52int ovs_vport_set_options(struct vport *, struct nlattr *options);
 53int ovs_vport_get_options(const struct vport *, struct sk_buff *);
 54
 55int ovs_vport_send(struct vport *, struct sk_buff *);
 
 
 56
 57/* The following definitions are for implementers of vport devices: */
 58
 59struct vport_err_stats {
 60	u64 rx_dropped;
 61	u64 rx_errors;
 62	u64 tx_dropped;
 63	u64 tx_errors;
 
 
 
 
 
 
 
 64};
 65
 66/**
 67 * struct vport - one port within a datapath
 68 * @rcu: RCU callback head for deferred destruction.
 69 * @dp: Datapath to which this port belongs.
 70 * @upcall_portid: The Netlink port to use for packets received on this port that
 71 * miss the flow table.
 72 * @port_no: Index into @dp's @ports array.
 73 * @hash_node: Element in @dev_table hash table in vport.c.
 74 * @dp_hash_node: Element in @datapath->ports hash table in datapath.c.
 75 * @ops: Class structure.
 76 * @percpu_stats: Points to per-CPU statistics used and maintained by vport
 77 * @stats_lock: Protects @err_stats;
 78 * @err_stats: Points to error statistics used and maintained by vport
 79 */
 80struct vport {
 81	struct rcu_head rcu;
 82	struct datapath	*dp;
 83	u32 upcall_portid;
 84	u16 port_no;
 85
 86	struct hlist_node hash_node;
 87	struct hlist_node dp_hash_node;
 88	const struct vport_ops *ops;
 89
 90	struct pcpu_sw_netstats __percpu *percpu_stats;
 91
 92	spinlock_t stats_lock;
 93	struct vport_err_stats err_stats;
 94};
 95
 96/**
 97 * struct vport_parms - parameters for creating a new vport
 98 *
 99 * @name: New vport's name.
100 * @type: New vport's type.
101 * @options: %OVS_VPORT_ATTR_OPTIONS attribute from Netlink message, %NULL if
102 * none was supplied.
103 * @dp: New vport's datapath.
104 * @port_no: New vport's port number.
105 */
106struct vport_parms {
107	const char *name;
108	enum ovs_vport_type type;
109	struct nlattr *options;
110
111	/* For ovs_vport_alloc(). */
112	struct datapath *dp;
113	u16 port_no;
114	u32 upcall_portid;
115};
116
117/**
118 * struct vport_ops - definition of a type of virtual port
119 *
120 * @type: %OVS_VPORT_TYPE_* value for this type of virtual port.
121 * @create: Create a new vport configured as specified.  On success returns
122 * a new vport allocated with ovs_vport_alloc(), otherwise an ERR_PTR() value.
123 * @destroy: Destroys a vport.  Must call vport_free() on the vport but not
124 * before an RCU grace period has elapsed.
125 * @set_options: Modify the configuration of an existing vport.  May be %NULL
126 * if modification is not supported.
127 * @get_options: Appends vport-specific attributes for the configuration of an
128 * existing vport to a &struct sk_buff.  May be %NULL for a vport that does not
129 * have any configuration.
130 * @get_name: Get the device's name.
131 * @send: Send a packet on the device.  Returns the length of the packet sent,
132 * zero for dropped packets or negative for error.
133 */
134struct vport_ops {
135	enum ovs_vport_type type;
136
137	/* Called with ovs_mutex. */
138	struct vport *(*create)(const struct vport_parms *);
139	void (*destroy)(struct vport *);
140
141	int (*set_options)(struct vport *, struct nlattr *);
142	int (*get_options)(const struct vport *, struct sk_buff *);
143
144	/* Called with rcu_read_lock or ovs_mutex. */
145	const char *(*get_name)(const struct vport *);
146
147	int (*send)(struct vport *, struct sk_buff *);
148};
149
150enum vport_err_type {
151	VPORT_E_RX_DROPPED,
152	VPORT_E_RX_ERROR,
153	VPORT_E_TX_DROPPED,
154	VPORT_E_TX_ERROR,
155};
156
157struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *,
158			      const struct vport_parms *);
159void ovs_vport_free(struct vport *);
160void ovs_vport_deferred_free(struct vport *vport);
161
162#define VPORT_ALIGN 8
163
164/**
165 *	vport_priv - access private data area of vport
166 *
167 * @vport: vport to access
168 *
169 * If a nonzero size was passed in priv_size of vport_alloc() a private data
170 * area was allocated on creation.  This allows that area to be accessed and
171 * used for any purpose needed by the vport implementer.
172 */
173static inline void *vport_priv(const struct vport *vport)
174{
175	return (u8 *)vport + ALIGN(sizeof(struct vport), VPORT_ALIGN);
176}
177
178/**
179 *	vport_from_priv - lookup vport from private data pointer
180 *
181 * @priv: Start of private data area.
182 *
183 * It is sometimes useful to translate from a pointer to the private data
184 * area to the vport, such as in the case where the private data pointer is
185 * the result of a hash table lookup.  @priv must point to the start of the
186 * private data area.
187 */
188static inline struct vport *vport_from_priv(const void *priv)
189{
190	return (struct vport *)(priv - ALIGN(sizeof(struct vport), VPORT_ALIGN));
191}
192
193void ovs_vport_receive(struct vport *, struct sk_buff *,
194		       struct ovs_key_ipv4_tunnel *);
195
196/* List of statically compiled vport implementations.  Don't forget to also
197 * add yours to the list at the top of vport.c. */
198extern const struct vport_ops ovs_netdev_vport_ops;
199extern const struct vport_ops ovs_internal_vport_ops;
200extern const struct vport_ops ovs_gre_vport_ops;
201extern const struct vport_ops ovs_vxlan_vport_ops;
202
203static inline void ovs_skb_postpush_rcsum(struct sk_buff *skb,
204				      const void *start, unsigned int len)
205{
206	if (skb->ip_summed == CHECKSUM_COMPLETE)
207		skb->csum = csum_add(skb->csum, csum_partial(start, len, 0));
208}
 
 
 
 
 
 
 
 
 
 
209
210#endif /* vport.h */