[mirror_ubuntu-artful-kernel.git] / drivers / net / ipvlan / ipvlan.h

/*
 * Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
 *
 * 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 __IPVLAN_H
#define __IPVLAN_H

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/rculist.h>
#include <linux/notifier.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/if_link.h>
#include <linux/if_vlan.h>
#include <linux/ip.h>
#include <linux/inetdevice.h>
#include <linux/netfilter.h>
#include <net/ip.h>
#include <net/ip6_route.h>
#include <net/netns/generic.h>
#include <net/rtnetlink.h>
#include <net/route.h>
#include <net/addrconf.h>
#include <net/l3mdev.h>

#define IPVLAN_DRV	"ipvlan"
#define IPV_DRV_VER	"0.1"

#define IPVLAN_HASH_SIZE	(1 << BITS_PER_BYTE)
#define IPVLAN_HASH_MASK	(IPVLAN_HASH_SIZE - 1)

#define IPVLAN_MAC_FILTER_BITS	8
#define IPVLAN_MAC_FILTER_SIZE	(1 << IPVLAN_MAC_FILTER_BITS)
#define IPVLAN_MAC_FILTER_MASK	(IPVLAN_MAC_FILTER_SIZE - 1)

#define IPVLAN_QBACKLOG_LIMIT	1000

typedef enum {
	IPVL_IPV6 = 0,
	IPVL_ICMPV6,
	IPVL_IPV4,
	IPVL_ARP,
} ipvl_hdr_type;

struct ipvl_pcpu_stats {
	u64			rx_pkts;
	u64			rx_bytes;
	u64			rx_mcast;
	u64			tx_pkts;
	u64			tx_bytes;
	struct u64_stats_sync	syncp;
	u32			rx_errs;
	u32			tx_drps;
};

struct ipvl_port;

struct ipvl_dev {
	struct net_device	*dev;
	struct list_head	pnode;
	struct ipvl_port	*port;
	struct net_device	*phy_dev;
	struct list_head	addrs;
	struct ipvl_pcpu_stats	__percpu *pcpu_stats;
	DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE);
	netdev_features_t	sfeatures;
	u32			msg_enable;
};

struct ipvl_addr {
	struct ipvl_dev		*master; /* Back pointer to master */
	union {
		struct in6_addr	ip6;	 /* IPv6 address on logical interface */
		struct in_addr	ip4;	 /* IPv4 address on logical interface */
	} ipu;
#define ip6addr	ipu.ip6
#define ip4addr ipu.ip4
	struct hlist_node	hlnode;  /* Hash-table linkage */
	struct list_head	anode;   /* logical-interface linkage */
	ipvl_hdr_type		atype;
	struct rcu_head		rcu;
};

struct ipvl_port {
	struct net_device	*dev;
	possible_net_t		pnet;
	struct hlist_head	hlhead[IPVLAN_HASH_SIZE];
	struct list_head	ipvlans;
	u16			mode;
	u16			dev_id_start;
	struct work_struct	wq;
	struct sk_buff_head	backlog;
	int			count;
	struct ida		ida;
};

struct ipvl_skb_cb {
	bool tx_pkt;
};
#define IPVL_SKB_CB(_skb) ((struct ipvl_skb_cb *)&((_skb)->cb[0]))

static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d)
{
	return rcu_dereference(d->rx_handler_data);
}

static inline struct ipvl_port *ipvlan_port_get_rcu_bh(const struct net_device *d)
{
	return rcu_dereference_bh(d->rx_handler_data);
}

static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d)
{
	return rtnl_dereference(d->rx_handler_data);
}

void ipvlan_init_secret(void);
unsigned int ipvlan_mac_hash(const unsigned char *addr);
rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);
void ipvlan_process_multicast(struct work_struct *work);
int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev);
void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr);
struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,
				   const void *iaddr, bool is_v6);
bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6);
void ipvlan_ht_addr_del(struct ipvl_addr *addr);
struct sk_buff *ipvlan_l3_rcv(struct net_device *dev, struct sk_buff *skb,
			      u16 proto);
unsigned int ipvlan_nf_input(void *priv, struct sk_buff *skb,
			     const struct nf_hook_state *state);
void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
		     unsigned int len, bool success, bool mcast);
int ipvlan_link_new(struct net *src_net, struct net_device *dev,
		    struct nlattr *tb[], struct nlattr *data[]);
void ipvlan_link_delete(struct net_device *dev, struct list_head *head);
void ipvlan_link_setup(struct net_device *dev);
int ipvlan_link_register(struct rtnl_link_ops *ops);
#endif /* __IPVLAN_H */
Commit	Line	Data
2ad7bf36 MB	1	/*
	2	* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License as
	6	* published by the Free Software Foundation; either version 2 of
	7	* the License, or (at your option) any later version.
	8	*
	9	*/
	10	#ifndef __IPVLAN_H
	11	#define __IPVLAN_H
	12
	13	#include <linux/kernel.h>
	14	#include <linux/types.h>
	15	#include <linux/module.h>
	16	#include <linux/init.h>
	17	#include <linux/rculist.h>
	18	#include <linux/notifier.h>
	19	#include <linux/netdevice.h>
	20	#include <linux/etherdevice.h>
	21	#include <linux/if_arp.h>
	22	#include <linux/if_link.h>
	23	#include <linux/if_vlan.h>
	24	#include <linux/ip.h>
	25	#include <linux/inetdevice.h>
4fbae7d8	26	#include <linux/netfilter.h>
265de6d1 MB	27	#include <net/ip.h>
265de6d1 MB	28	#include <net/ip6_route.h>
3133822f	29	#include <net/netns/generic.h>
2ad7bf36	30	#include <net/rtnetlink.h>
2ad7bf36 MB	31	#include <net/route.h>
2ad7bf36 MB	32	#include <net/addrconf.h>
4fbae7d8	33	#include <net/l3mdev.h>
2ad7bf36 MB	34
	35	#define IPVLAN_DRV "ipvlan"
	36	#define IPV_DRV_VER "0.1"
	37
	38	#define IPVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
	39	#define IPVLAN_HASH_MASK (IPVLAN_HASH_SIZE - 1)
	40
	41	#define IPVLAN_MAC_FILTER_BITS 8
	42	#define IPVLAN_MAC_FILTER_SIZE (1 << IPVLAN_MAC_FILTER_BITS)
	43	#define IPVLAN_MAC_FILTER_MASK (IPVLAN_MAC_FILTER_SIZE - 1)
	44
ba35f858 MB	45	#define IPVLAN_QBACKLOG_LIMIT 1000
ba35f858 MB	46
2ad7bf36 MB	47	typedef enum {
	48	IPVL_IPV6 = 0,
	49	IPVL_ICMPV6,
	50	IPVL_IPV4,
	51	IPVL_ARP,
	52	} ipvl_hdr_type;
	53
	54	struct ipvl_pcpu_stats {
	55	u64 rx_pkts;
	56	u64 rx_bytes;
	57	u64 rx_mcast;
	58	u64 tx_pkts;
	59	u64 tx_bytes;
	60	struct u64_stats_sync syncp;
	61	u32 rx_errs;
	62	u32 tx_drps;
	63	};
	64
	65	struct ipvl_port;
	66
	67	struct ipvl_dev {
	68	struct net_device *dev;
	69	struct list_head pnode;
	70	struct ipvl_port *port;
	71	struct net_device *phy_dev;
	72	struct list_head addrs;
6aa6395f	73	struct ipvl_pcpu_stats __percpu *pcpu_stats;
2ad7bf36 MB	74	DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE);
	75	netdev_features_t sfeatures;
	76	u32 msg_enable;
2ad7bf36 MB	77	};
	78
	79	struct ipvl_addr {
	80	struct ipvl_dev master; / Back pointer to master */
	81	union {
	82	struct in6_addr ip6; /* IPv6 address on logical interface */
	83	struct in_addr ip4; /* IPv4 address on logical interface */
	84	} ipu;
	85	#define ip6addr ipu.ip6
	86	#define ip4addr ipu.ip4
	87	struct hlist_node hlnode; /* Hash-table linkage */
	88	struct list_head anode; /* logical-interface linkage */
2ad7bf36	89	ipvl_hdr_type atype;
ab5b7013	90	struct rcu_head rcu;
2ad7bf36 MB	91	};
	92
	93	struct ipvl_port {
	94	struct net_device *dev;
3133822f	95	possible_net_t pnet;
2ad7bf36 MB	96	struct hlist_head hlhead[IPVLAN_HASH_SIZE];
2ad7bf36 MB	97	struct list_head ipvlans;
ab5b7013	98	u16 mode;
da36e13c	99	u16 dev_id_start;
ba35f858 MB	100	struct work_struct wq;
ba35f858 MB	101	struct sk_buff_head backlog;
2ad7bf36	102	int count;
009146d1	103	struct ida ida;
2ad7bf36 MB	104	};
2ad7bf36 MB	105
e2525360 MB	106	struct ipvl_skb_cb {
	107	bool tx_pkt;
	108	};
	109	#define IPVL_SKB_CB(_skb) ((struct ipvl_skb_cb *)&((_skb)->cb[0]))
	110
2ad7bf36 MB	111	static inline struct ipvl_port ipvlan_port_get_rcu(const struct net_device d)
	112	{
	113	return rcu_dereference(d->rx_handler_data);
	114	}
	115
0fba37a3 WC	116	static inline struct ipvl_port ipvlan_port_get_rcu_bh(const struct net_device d)
	117	{
	118	return rcu_dereference_bh(d->rx_handler_data);
	119	}
	120
2ad7bf36 MB	121	static inline struct ipvl_port ipvlan_port_get_rtnl(const struct net_device d)
	122	{
	123	return rtnl_dereference(d->rx_handler_data);
	124	}
	125
2ad7bf36 MB	126	void ipvlan_init_secret(void);
	127	unsigned int ipvlan_mac_hash(const unsigned char *addr);
	128	rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);
ba35f858	129	void ipvlan_process_multicast(struct work_struct *work);
2ad7bf36 MB	130	int ipvlan_queue_xmit(struct sk_buff skb, struct net_device dev);
2ad7bf36 MB	131	void ipvlan_ht_addr_add(struct ipvl_dev ipvlan, struct ipvl_addr addr);
e9997c29 JB	132	struct ipvl_addr ipvlan_find_addr(const struct ipvl_dev ipvlan,
	133	const void *iaddr, bool is_v6);
	134	bool ipvlan_addr_busy(struct ipvl_port port, void iaddr, bool is_v6);
6640e673	135	void ipvlan_ht_addr_del(struct ipvl_addr *addr);
4fbae7d8 MB	136	struct sk_buff ipvlan_l3_rcv(struct net_device dev, struct sk_buff *skb,
	137	u16 proto);
	138	unsigned int ipvlan_nf_input(void priv, struct sk_buff skb,
	139	const struct nf_hook_state *state);
235a9d89 SG	140	void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
	141	unsigned int len, bool success, bool mcast);
	142	int ipvlan_link_new(struct net src_net, struct net_device dev,
	143	struct nlattr tb[], struct nlattr data[]);
	144	void ipvlan_link_delete(struct net_device dev, struct list_head head);
	145	void ipvlan_link_setup(struct net_device *dev);
	146	int ipvlan_link_register(struct rtnl_link_ops *ops);
2ad7bf36	147	#endif /* __IPVLAN_H */