[mirror_ubuntu-bionic-kernel.git] / include / net / vrf.h

/*
 * include/net/net_vrf.h - adds vrf dev structure definitions
 * Copyright (c) 2015 Cumulus Networks
 *
 * 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_NET_VRF_H
#define __LINUX_NET_VRF_H

struct net_vrf_dev {
	struct rcu_head		rcu;
	int                     ifindex; /* ifindex of master dev */
	u32                     tb_id;   /* table id for VRF */
};

struct slave {
	struct list_head	list;
	struct net_device	*dev;
};

struct slave_queue {
	struct list_head	all_slaves;
};

struct net_vrf {
	struct slave_queue	queue;
	struct rtable           *rth;
	u32			tb_id;
};


#if IS_ENABLED(CONFIG_NET_VRF)
/* called with rcu_read_lock() */
static inline int vrf_master_ifindex_rcu(const struct net_device *dev)
{
	struct net_vrf_dev *vrf_ptr;
	int ifindex = 0;

	if (!dev)
		return 0;

	if (netif_is_vrf(dev)) {
		ifindex = dev->ifindex;
	} else {
		vrf_ptr = rcu_dereference(dev->vrf_ptr);
		if (vrf_ptr)
			ifindex = vrf_ptr->ifindex;
	}

	return ifindex;
}

static inline int vrf_master_ifindex(const struct net_device *dev)
{
	int ifindex;

	rcu_read_lock();
	ifindex = vrf_master_ifindex_rcu(dev);
	rcu_read_unlock();

	return ifindex;
}

/* called with rcu_read_lock */
static inline u32 vrf_dev_table_rcu(const struct net_device *dev)
{
	u32 tb_id = 0;

	if (dev) {
		struct net_vrf_dev *vrf_ptr;

		vrf_ptr = rcu_dereference(dev->vrf_ptr);
		if (vrf_ptr)
			tb_id = vrf_ptr->tb_id;
	}
	return tb_id;
}

static inline u32 vrf_dev_table(const struct net_device *dev)
{
	u32 tb_id;

	rcu_read_lock();
	tb_id = vrf_dev_table_rcu(dev);
	rcu_read_unlock();

	return tb_id;
}

static inline u32 vrf_dev_table_ifindex(struct net *net, int ifindex)
{
	struct net_device *dev;
	u32 tb_id = 0;

	if (!ifindex)
		return 0;

	rcu_read_lock();

	dev = dev_get_by_index_rcu(net, ifindex);
	if (dev)
		tb_id = vrf_dev_table_rcu(dev);

	rcu_read_unlock();

	return tb_id;
}

/* called with rtnl */
static inline u32 vrf_dev_table_rtnl(const struct net_device *dev)
{
	u32 tb_id = 0;

	if (dev) {
		struct net_vrf_dev *vrf_ptr;

		vrf_ptr = rtnl_dereference(dev->vrf_ptr);
		if (vrf_ptr)
			tb_id = vrf_ptr->tb_id;
	}
	return tb_id;
}

/* caller has already checked netif_is_vrf(dev) */
static inline struct rtable *vrf_dev_get_rth(const struct net_device *dev)
{
	struct rtable *rth = ERR_PTR(-ENETUNREACH);
	struct net_vrf *vrf = netdev_priv(dev);

	if (vrf) {
		rth = vrf->rth;
		atomic_inc(&rth->dst.__refcnt);
	}
	return rth;
}

#else
static inline int vrf_master_ifindex_rcu(const struct net_device *dev)
{
	return 0;
}

static inline int vrf_master_ifindex(const struct net_device *dev)
{
	return 0;
}

static inline u32 vrf_dev_table_rcu(const struct net_device *dev)
{
	return 0;
}

static inline u32 vrf_dev_table(const struct net_device *dev)
{
	return 0;
}

static inline u32 vrf_dev_table_ifindex(struct net *net, int ifindex)
{
	return 0;
}

static inline u32 vrf_dev_table_rtnl(const struct net_device *dev)
{
	return 0;
}

static inline struct rtable *vrf_dev_get_rth(const struct net_device *dev)
{
	return ERR_PTR(-ENETUNREACH);
}
#endif

#endif /* __LINUX_NET_VRF_H */
Commit	Line	Data
4e3c8992 DA	1	/*
	2	* include/net/net_vrf.h - adds vrf dev structure definitions
	3	* Copyright (c) 2015 Cumulus Networks
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*/
	10
	11	#ifndef __LINUX_NET_VRF_H
	12	#define __LINUX_NET_VRF_H
	13
	14	struct net_vrf_dev {
	15	struct rcu_head rcu;
	16	int ifindex; /* ifindex of master dev */
	17	u32 tb_id; /* table id for VRF */
	18	};
	19
	20	struct slave {
	21	struct list_head list;
	22	struct net_device *dev;
	23	};
	24
	25	struct slave_queue {
	26	struct list_head all_slaves;
4e3c8992 DA	27	};
	28
	29	struct net_vrf {
	30	struct slave_queue queue;
	31	struct rtable *rth;
	32	u32 tb_id;
	33	};
	34
	35
	36	#if IS_ENABLED(CONFIG_NET_VRF)
	37	/* called with rcu_read_lock() */
	38	static inline int vrf_master_ifindex_rcu(const struct net_device *dev)
	39	{
	40	struct net_vrf_dev *vrf_ptr;
	41	int ifindex = 0;
	42
	43	if (!dev)
	44	return 0;
	45
18041e31	46	if (netif_is_vrf(dev)) {
4e3c8992	47	ifindex = dev->ifindex;
18041e31	48	} else {
4e3c8992 DA	49	vrf_ptr = rcu_dereference(dev->vrf_ptr);
	50	if (vrf_ptr)
	51	ifindex = vrf_ptr->ifindex;
	52	}
	53
	54	return ifindex;
	55	}
	56
18041e31 NA	57	static inline int vrf_master_ifindex(const struct net_device *dev)
	58	{
	59	int ifindex;
	60
	61	rcu_read_lock();
	62	ifindex = vrf_master_ifindex_rcu(dev);
	63	rcu_read_unlock();
	64
	65	return ifindex;
	66	}
	67
4e3c8992	68	/* called with rcu_read_lock */
9b8ff518	69	static inline u32 vrf_dev_table_rcu(const struct net_device *dev)
4e3c8992	70	{
9b8ff518	71	u32 tb_id = 0;
4e3c8992 DA	72
	73	if (dev) {
	74	struct net_vrf_dev *vrf_ptr;
	75
	76	vrf_ptr = rcu_dereference(dev->vrf_ptr);
	77	if (vrf_ptr)
	78	tb_id = vrf_ptr->tb_id;
	79	}
	80	return tb_id;
	81	}
	82
9b8ff518	83	static inline u32 vrf_dev_table(const struct net_device *dev)
4e3c8992	84	{
9b8ff518	85	u32 tb_id;
4e3c8992 DA	86
	87	rcu_read_lock();
	88	tb_id = vrf_dev_table_rcu(dev);
	89	rcu_read_unlock();
	90
	91	return tb_id;
	92	}
	93
9b8ff518	94	static inline u32 vrf_dev_table_ifindex(struct net *net, int ifindex)
dc028da5 DA	95	{
dc028da5 DA	96	struct net_device *dev;
9b8ff518	97	u32 tb_id = 0;
dc028da5 DA	98
	99	if (!ifindex)
	100	return 0;
	101
	102	rcu_read_lock();
	103
	104	dev = dev_get_by_index_rcu(net, ifindex);
	105	if (dev)
	106	tb_id = vrf_dev_table_rcu(dev);
	107
	108	rcu_read_unlock();
	109
	110	return tb_id;
	111	}
	112
4e3c8992	113	/* called with rtnl */
9b8ff518	114	static inline u32 vrf_dev_table_rtnl(const struct net_device *dev)
4e3c8992	115	{
9b8ff518	116	u32 tb_id = 0;
4e3c8992 DA	117
	118	if (dev) {
	119	struct net_vrf_dev *vrf_ptr;
	120
	121	vrf_ptr = rtnl_dereference(dev->vrf_ptr);
	122	if (vrf_ptr)
	123	tb_id = vrf_ptr->tb_id;
	124	}
	125	return tb_id;
	126	}
	127
	128	/* caller has already checked netif_is_vrf(dev) */
	129	static inline struct rtable vrf_dev_get_rth(const struct net_device dev)
	130	{
	131	struct rtable *rth = ERR_PTR(-ENETUNREACH);
	132	struct net_vrf *vrf = netdev_priv(dev);
	133
	134	if (vrf) {
	135	rth = vrf->rth;
	136	atomic_inc(&rth->dst.__refcnt);
	137	}
	138	return rth;
	139	}
	140
	141	#else
	142	static inline int vrf_master_ifindex_rcu(const struct net_device *dev)
	143	{
	144	return 0;
	145	}
	146
18041e31 NA	147	static inline int vrf_master_ifindex(const struct net_device *dev)
	148	{
	149	return 0;
	150	}
	151
9b8ff518	152	static inline u32 vrf_dev_table_rcu(const struct net_device *dev)
4e3c8992 DA	153	{
	154	return 0;
	155	}
	156
9b8ff518	157	static inline u32 vrf_dev_table(const struct net_device *dev)
4e3c8992 DA	158	{
	159	return 0;
	160	}
	161
9b8ff518	162	static inline u32 vrf_dev_table_ifindex(struct net *net, int ifindex)
dc028da5 DA	163	{
	164	return 0;
	165	}
	166
9b8ff518	167	static inline u32 vrf_dev_table_rtnl(const struct net_device *dev)
4e3c8992 DA	168	{
	169	return 0;
	170	}
	171
	172	static inline struct rtable vrf_dev_get_rth(const struct net_device dev)
	173	{
	174	return ERR_PTR(-ENETUNREACH);
	175	}
	176	#endif
	177
	178	#endif /* __LINUX_NET_VRF_H */