switchdev.h 5.9 KB
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/*
 * include/net/switchdev.h - Switch device API
 * Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
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 * Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com>
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 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */
#ifndef _LINUX_SWITCHDEV_H_
#define _LINUX_SWITCHDEV_H_

#include <linux/netdevice.h>
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#include <linux/notifier.h>

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#define SWITCHDEV_F_NO_RECURSE		BIT(0)

enum switchdev_trans {
	SWITCHDEV_TRANS_NONE,
	SWITCHDEV_TRANS_PREPARE,
	SWITCHDEV_TRANS_ABORT,
	SWITCHDEV_TRANS_COMMIT,
};

enum switchdev_attr_id {
	SWITCHDEV_ATTR_UNDEFINED,
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	SWITCHDEV_ATTR_PORT_PARENT_ID,
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	SWITCHDEV_ATTR_PORT_STP_STATE,
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	SWITCHDEV_ATTR_PORT_BRIDGE_FLAGS,
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};

struct switchdev_attr {
	enum switchdev_attr_id id;
	enum switchdev_trans trans;
	u32 flags;
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	union {
		struct netdev_phys_item_id ppid;	/* PORT_PARENT_ID */
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		u8 stp_state;				/* PORT_STP_STATE */
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		unsigned long brport_flags;		/* PORT_BRIDGE_FLAGS */
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	};
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};

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struct fib_info;

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enum switchdev_obj_id {
	SWITCHDEV_OBJ_UNDEFINED,
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	SWITCHDEV_OBJ_PORT_VLAN,
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};

struct switchdev_obj {
	enum switchdev_obj_id id;
	enum switchdev_trans trans;
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	union {
		struct switchdev_obj_vlan {			/* PORT_VLAN */
			u16 flags;
			u16 vid_start;
			u16 vid_end;
		} vlan;
	};
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};

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/**
 * struct switchdev_ops - switchdev operations
 *
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 * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr).
 *
 * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr).
 *
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 * @switchdev_port_obj_add: Add an object to port (see switchdev_obj).
 *
 * @switchdev_port_obj_del: Delete an object from port (see switchdev_obj).
 *
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 * @switchdev_fib_ipv4_add: Called to add/modify IPv4 route to switch device.
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 *
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 * @switchdev_fib_ipv4_del: Called to delete IPv4 route from switch device.
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 */
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struct switchdev_ops {
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	int	(*switchdev_port_attr_get)(struct net_device *dev,
					   struct switchdev_attr *attr);
	int	(*switchdev_port_attr_set)(struct net_device *dev,
					   struct switchdev_attr *attr);
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	int	(*switchdev_port_obj_add)(struct net_device *dev,
					  struct switchdev_obj *obj);
	int	(*switchdev_port_obj_del)(struct net_device *dev,
					  struct switchdev_obj *obj);
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	int	(*switchdev_fib_ipv4_add)(struct net_device *dev, __be32 dst,
					  int dst_len, struct fib_info *fi,
					  u8 tos, u8 type, u32 nlflags,
					  u32 tb_id);
	int	(*switchdev_fib_ipv4_del)(struct net_device *dev, __be32 dst,
					  int dst_len, struct fib_info *fi,
					  u8 tos, u8 type, u32 tb_id);
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};

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enum switchdev_notifier_type {
	SWITCHDEV_FDB_ADD = 1,
	SWITCHDEV_FDB_DEL,
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};

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struct switchdev_notifier_info {
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	struct net_device *dev;
};

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struct switchdev_notifier_fdb_info {
	struct switchdev_notifier_info info; /* must be first */
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	const unsigned char *addr;
	u16 vid;
};

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static inline struct net_device *
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switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
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{
	return info->dev;
}
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#ifdef CONFIG_NET_SWITCHDEV

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int switchdev_port_attr_get(struct net_device *dev,
			    struct switchdev_attr *attr);
int switchdev_port_attr_set(struct net_device *dev,
			    struct switchdev_attr *attr);
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int switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj);
int switchdev_port_obj_del(struct net_device *dev, struct switchdev_obj *obj);
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int register_switchdev_notifier(struct notifier_block *nb);
int unregister_switchdev_notifier(struct notifier_block *nb);
int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
			     struct switchdev_notifier_info *info);
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int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
				  struct net_device *dev, u32 filter_mask,
				  int nlflags);
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int switchdev_port_bridge_setlink(struct net_device *dev,
				  struct nlmsghdr *nlh, u16 flags);
int switchdev_port_bridge_dellink(struct net_device *dev,
				  struct nlmsghdr *nlh, u16 flags);
int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
			   u8 tos, u8 type, u32 nlflags, u32 tb_id);
int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
			   u8 tos, u8 type, u32 tb_id);
void switchdev_fib_ipv4_abort(struct fib_info *fi);
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#else

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static inline int switchdev_port_attr_get(struct net_device *dev,
					  struct switchdev_attr *attr)
{
	return -EOPNOTSUPP;
}

static inline int switchdev_port_attr_set(struct net_device *dev,
					  struct switchdev_attr *attr)
{
	return -EOPNOTSUPP;
}

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static inline int switchdev_port_obj_add(struct net_device *dev,
					 struct switchdev_obj *obj)
{
	return -EOPNOTSUPP;
}

static inline int switchdev_port_obj_del(struct net_device *dev,
					 struct switchdev_obj *obj)
{
	return -EOPNOTSUPP;
}

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static inline int register_switchdev_notifier(struct notifier_block *nb)
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{
	return 0;
}

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static inline int unregister_switchdev_notifier(struct notifier_block *nb)
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{
	return 0;
}

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static inline int call_switchdev_notifiers(unsigned long val,
					   struct net_device *dev,
					   struct switchdev_notifier_info *info)
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{
	return NOTIFY_DONE;
}

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static inline int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid,
					    u32 seq, struct net_device *dev,
					    u32 filter_mask, int nlflags)
{
	return -EOPNOTSUPP;
}

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static inline int switchdev_port_bridge_setlink(struct net_device *dev,
						struct nlmsghdr *nlh,
						u16 flags)
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{
	return -EOPNOTSUPP;
}

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static inline int switchdev_port_bridge_dellink(struct net_device *dev,
						struct nlmsghdr *nlh,
						u16 flags)
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{
	return -EOPNOTSUPP;
}

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static inline int switchdev_fib_ipv4_add(u32 dst, int dst_len,
					 struct fib_info *fi,
					 u8 tos, u8 type,
					 u32 nlflags, u32 tb_id)
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{
	return 0;
}

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static inline int switchdev_fib_ipv4_del(u32 dst, int dst_len,
					 struct fib_info *fi,
					 u8 tos, u8 type, u32 tb_id)
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{
	return 0;
}

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static inline void switchdev_fib_ipv4_abort(struct fib_info *fi)
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{
}

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#endif

#endif /* _LINUX_SWITCHDEV_H_ */