[mirror_ubuntu-zesty-kernel.git] / include / linux / inetdevice.h

#ifndef _LINUX_INETDEVICE_H
#define _LINUX_INETDEVICE_H

#ifdef __KERNEL__

#include <linux/bitmap.h>
#include <linux/if.h>
#include <linux/netdevice.h>
#include <linux/rcupdate.h>
#include <linux/timer.h>
#include <linux/sysctl.h>

struct ipv4_devconf
{
	void	*sysctl;
	int	data[__NET_IPV4_CONF_MAX - 1];
	DECLARE_BITMAP(state, __NET_IPV4_CONF_MAX - 1);
};

struct in_device
{
	struct net_device	*dev;
	atomic_t		refcnt;
	int			dead;
	struct in_ifaddr	*ifa_list;	/* IP ifaddr chain		*/
	rwlock_t		mc_list_lock;
	struct ip_mc_list	*mc_list;	/* IP multicast filter chain    */
	int			mc_count;	          /* Number of installed mcasts	*/
	spinlock_t		mc_tomb_lock;
	struct ip_mc_list	*mc_tomb;
	unsigned long		mr_v1_seen;
	unsigned long		mr_v2_seen;
	unsigned long		mr_maxdelay;
	unsigned char		mr_qrv;
	unsigned char		mr_gq_running;
	unsigned char		mr_ifc_count;
	struct timer_list	mr_gq_timer;	/* general query timer */
	struct timer_list	mr_ifc_timer;	/* interface change timer */

	struct neigh_parms	*arp_parms;
	struct ipv4_devconf	cnf;
	struct rcu_head		rcu_head;
};

#define IPV4_DEVCONF(cnf, attr) ((cnf).data[NET_IPV4_CONF_ ## attr - 1])
#define IPV4_DEVCONF_ALL(net, attr) \
	IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)

static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
{
	index--;
	return in_dev->cnf.data[index];
}

static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
				    int val)
{
	index--;
	set_bit(index, in_dev->cnf.state);
	in_dev->cnf.data[index] = val;
}

static inline void ipv4_devconf_setall(struct in_device *in_dev)
{
	bitmap_fill(in_dev->cnf.state, __NET_IPV4_CONF_MAX - 1);
}

#define IN_DEV_CONF_GET(in_dev, attr) \
	ipv4_devconf_get((in_dev), NET_IPV4_CONF_ ## attr)
#define IN_DEV_CONF_SET(in_dev, attr, val) \
	ipv4_devconf_set((in_dev), NET_IPV4_CONF_ ## attr, (val))

#define IN_DEV_ANDCONF(in_dev, attr) \
	(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
	 IN_DEV_CONF_GET((in_dev), attr))
#define IN_DEV_ORCONF(in_dev, attr) \
	(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \
	 IN_DEV_CONF_GET((in_dev), attr))
#define IN_DEV_MAXCONF(in_dev, attr) \
	(max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
	     IN_DEV_CONF_GET((in_dev), attr)))

#define IN_DEV_FORWARD(in_dev)		IN_DEV_CONF_GET((in_dev), FORWARDING)
#define IN_DEV_MFORWARD(in_dev)		IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
#define IN_DEV_RPFILTER(in_dev)		IN_DEV_ANDCONF((in_dev), RP_FILTER)
#define IN_DEV_SOURCE_ROUTE(in_dev)	IN_DEV_ANDCONF((in_dev), \
						       ACCEPT_SOURCE_ROUTE)
#define IN_DEV_BOOTP_RELAY(in_dev)	IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)

#define IN_DEV_LOG_MARTIANS(in_dev)	IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
#define IN_DEV_PROXY_ARP(in_dev)	IN_DEV_ORCONF((in_dev), PROXY_ARP)
#define IN_DEV_SHARED_MEDIA(in_dev)	IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
#define IN_DEV_TX_REDIRECTS(in_dev)	IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
#define IN_DEV_SEC_REDIRECTS(in_dev)	IN_DEV_ORCONF((in_dev), \
						      SECURE_REDIRECTS)
#define IN_DEV_IDTAG(in_dev)		IN_DEV_CONF_GET(in_dev, TAG)
#define IN_DEV_MEDIUM_ID(in_dev)	IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
					IN_DEV_ORCONF((in_dev), \
						      PROMOTE_SECONDARIES)

#define IN_DEV_RX_REDIRECTS(in_dev) \
	((IN_DEV_FORWARD(in_dev) && \
	  IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
	 || (!IN_DEV_FORWARD(in_dev) && \
	  IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))

#define IN_DEV_ARPFILTER(in_dev)	IN_DEV_ORCONF((in_dev), ARPFILTER)
#define IN_DEV_ARP_ANNOUNCE(in_dev)	IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
#define IN_DEV_ARP_IGNORE(in_dev)	IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
#define IN_DEV_ARP_NOTIFY(in_dev)	IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)

struct in_ifaddr
{
	struct in_ifaddr	*ifa_next;
	struct in_device	*ifa_dev;
	struct rcu_head		rcu_head;
	__be32			ifa_local;
	__be32			ifa_address;
	__be32			ifa_mask;
	__be32			ifa_broadcast;
	unsigned char		ifa_scope;
	unsigned char		ifa_flags;
	unsigned char		ifa_prefixlen;
	char			ifa_label[IFNAMSIZ];
};

extern int register_inetaddr_notifier(struct notifier_block *nb);
extern int unregister_inetaddr_notifier(struct notifier_block *nb);

extern struct net_device *ip_dev_find(struct net *net, __be32 addr);
extern int		inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
extern int		devinet_ioctl(struct net *net, unsigned int cmd, void __user *);
extern void		devinet_init(void);
extern struct in_device	*inetdev_by_index(struct net *, int);
extern __be32		inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
extern __be32		inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope);
extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask);

static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
{
	return !((addr^ifa->ifa_address)&ifa->ifa_mask);
}

/*
 *	Check if a mask is acceptable.
 */
 
static __inline__ int bad_mask(__be32 mask, __be32 addr)
{
	__u32 hmask;
	if (addr & (mask = ~mask))
		return 1;
	hmask = ntohl(mask);
	if (hmask & (hmask+1))
		return 1;
	return 0;
}

#define for_primary_ifa(in_dev)	{ struct in_ifaddr *ifa; \
  for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)

#define for_ifa(in_dev)	{ struct in_ifaddr *ifa; \
  for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)


#define endfor_ifa(in_dev) }

static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
{
	struct in_device *in_dev = dev->ip_ptr;
	if (in_dev)
		in_dev = rcu_dereference(in_dev);
	return in_dev;
}

static __inline__ struct in_device *
in_dev_get(const struct net_device *dev)
{
	struct in_device *in_dev;

	rcu_read_lock();
	in_dev = __in_dev_get_rcu(dev);
	if (in_dev)
		atomic_inc(&in_dev->refcnt);
	rcu_read_unlock();
	return in_dev;
}

static __inline__ struct in_device *
__in_dev_get_rtnl(const struct net_device *dev)
{
	return (struct in_device*)dev->ip_ptr;
}

extern void in_dev_finish_destroy(struct in_device *idev);

static inline void in_dev_put(struct in_device *idev)
{
	if (atomic_dec_and_test(&idev->refcnt))
		in_dev_finish_destroy(idev);
}

#define __in_dev_put(idev)  atomic_dec(&(idev)->refcnt)
#define in_dev_hold(idev)   atomic_inc(&(idev)->refcnt)

#endif /* __KERNEL__ */

static __inline__ __be32 inet_make_mask(int logmask)
{
	if (logmask)
		return htonl(~((1<<(32-logmask))-1));
	return 0;
}

static __inline__ int inet_mask_len(__be32 mask)
{
	__u32 hmask = ntohl(mask);
	if (!hmask)
		return 0;
	return 32 - ffz(~hmask);
}


#endif /* _LINUX_INETDEVICE_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_INETDEVICE_H
	2	#define _LINUX_INETDEVICE_H
	3
	4	#ifdef __KERNEL__
	5
31be3085	6	#include <linux/bitmap.h>
1da177e4 LT	7	#include <linux/if.h>
	8	#include <linux/netdevice.h>
	9	#include <linux/rcupdate.h>
	10	#include <linux/timer.h>
8bfe6d68	11	#include <linux/sysctl.h>
1da177e4 LT	12
	13	struct ipv4_devconf
	14	{
1da177e4	15	void *sysctl;
42f811b8	16	int data[__NET_IPV4_CONF_MAX - 1];
31be3085	17	DECLARE_BITMAP(state, __NET_IPV4_CONF_MAX - 1);
1da177e4 LT	18	};
1da177e4 LT	19
1da177e4 LT	20	struct in_device
	21	{
	22	struct net_device *dev;
	23	atomic_t refcnt;
	24	int dead;
	25	struct in_ifaddr ifa_list; / IP ifaddr chain */
	26	rwlock_t mc_list_lock;
	27	struct ip_mc_list mc_list; / IP multicast filter chain */
b8bae41e	28	int mc_count; /* Number of installed mcasts */
1da177e4 LT	29	spinlock_t mc_tomb_lock;
	30	struct ip_mc_list *mc_tomb;
	31	unsigned long mr_v1_seen;
	32	unsigned long mr_v2_seen;
	33	unsigned long mr_maxdelay;
	34	unsigned char mr_qrv;
	35	unsigned char mr_gq_running;
	36	unsigned char mr_ifc_count;
	37	struct timer_list mr_gq_timer; /* general query timer */
	38	struct timer_list mr_ifc_timer; /* interface change timer */
	39
	40	struct neigh_parms *arp_parms;
	41	struct ipv4_devconf cnf;
	42	struct rcu_head rcu_head;
	43	};
	44
42f811b8	45	#define IPV4_DEVCONF(cnf, attr) ((cnf).data[NET_IPV4_CONF_ ## attr - 1])
586f1211 PE	46	#define IPV4_DEVCONF_ALL(net, attr) \
586f1211 PE	47	IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
42f811b8 HX	48
	49	static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
	50	{
	51	index--;
	52	return in_dev->cnf.data[index];
	53	}
	54
	55	static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
	56	int val)
	57	{
	58	index--;
31be3085	59	set_bit(index, in_dev->cnf.state);
42f811b8 HX	60	in_dev->cnf.data[index] = val;
	61	}
	62
71e27da9 HX	63	static inline void ipv4_devconf_setall(struct in_device *in_dev)
	64	{
	65	bitmap_fill(in_dev->cnf.state, __NET_IPV4_CONF_MAX - 1);
	66	}
	67
42f811b8 HX	68	#define IN_DEV_CONF_GET(in_dev, attr) \
	69	ipv4_devconf_get((in_dev), NET_IPV4_CONF_ ## attr)
	70	#define IN_DEV_CONF_SET(in_dev, attr, val) \
	71	ipv4_devconf_set((in_dev), NET_IPV4_CONF_ ## attr, (val))
	72
	73	#define IN_DEV_ANDCONF(in_dev, attr) \
c346dca1	74	(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
586f1211	75	IN_DEV_CONF_GET((in_dev), attr))
42f811b8	76	#define IN_DEV_ORCONF(in_dev, attr) \
c346dca1	77	(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) \|\| \
586f1211	78	IN_DEV_CONF_GET((in_dev), attr))
42f811b8	79	#define IN_DEV_MAXCONF(in_dev, attr) \
c346dca1	80	(max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
586f1211	81	IN_DEV_CONF_GET((in_dev), attr)))
42f811b8 HX	82
42f811b8 HX	83	#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
01ecfe9b	84	#define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
42f811b8 HX	85	#define IN_DEV_RPFILTER(in_dev) IN_DEV_ANDCONF((in_dev), RP_FILTER)
	86	#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
	87	ACCEPT_SOURCE_ROUTE)
	88	#define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
	89
	90	#define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
	91	#define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
	92	#define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
	93	#define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
	94	#define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
	95	SECURE_REDIRECTS)
	96	#define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
	97	#define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
	98	#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
	99	IN_DEV_ORCONF((in_dev), \
	100	PROMOTE_SECONDARIES)
1da177e4 LT	101
	102	#define IN_DEV_RX_REDIRECTS(in_dev) \
	103	((IN_DEV_FORWARD(in_dev) && \
42f811b8	104	IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
1da177e4	105	\|\| (!IN_DEV_FORWARD(in_dev) && \
42f811b8	106	IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
1da177e4	107
42f811b8 HX	108	#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
	109	#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
	110	#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
eefef1cf	111	#define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
1da177e4 LT	112
	113	struct in_ifaddr
	114	{
	115	struct in_ifaddr *ifa_next;
	116	struct in_device *ifa_dev;
	117	struct rcu_head rcu_head;
a144ea4b AV	118	__be32 ifa_local;
	119	__be32 ifa_address;
	120	__be32 ifa_mask;
	121	__be32 ifa_broadcast;
1da177e4 LT	122	unsigned char ifa_scope;
	123	unsigned char ifa_flags;
	124	unsigned char ifa_prefixlen;
	125	char ifa_label[IFNAMSIZ];
	126	};
	127
	128	extern int register_inetaddr_notifier(struct notifier_block *nb);
	129	extern int unregister_inetaddr_notifier(struct notifier_block *nb);
	130
1ab35276	131	extern struct net_device ip_dev_find(struct net net, __be32 addr);
ff428d72	132	extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
e5b13cb1	133	extern int devinet_ioctl(struct net net, unsigned int cmd, void __user );
1da177e4	134	extern void devinet_init(void);
7fee0ca2	135	extern struct in_device inetdev_by_index(struct net , int);
a61ced5d	136	extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
9bd85e32	137	extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope);
60cad5da	138	extern struct in_ifaddr inet_ifa_byprefix(struct in_device in_dev, __be32 prefix, __be32 mask);
1da177e4	139
60cad5da	140	static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
1da177e4 LT	141	{
	142	return !((addr^ifa->ifa_address)&ifa->ifa_mask);
	143	}
	144
	145	/*
	146	* Check if a mask is acceptable.
	147	*/
	148
714e85be	149	static __inline__ int bad_mask(__be32 mask, __be32 addr)
1da177e4	150	{
714e85be	151	__u32 hmask;
1da177e4 LT	152	if (addr & (mask = ~mask))
1da177e4 LT	153	return 1;
714e85be AV	154	hmask = ntohl(mask);
714e85be AV	155	if (hmask & (hmask+1))
1da177e4 LT	156	return 1;
	157	return 0;
	158	}
	159
	160	#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
	161	for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
	162
	163	#define for_ifa(in_dev) { struct in_ifaddr *ifa; \
	164	for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
	165
	166
	167	#define endfor_ifa(in_dev) }
	168
e5ed6399 HX	169	static inline struct in_device __in_dev_get_rcu(const struct net_device dev)
	170	{
	171	struct in_device *in_dev = dev->ip_ptr;
	172	if (in_dev)
	173	in_dev = rcu_dereference(in_dev);
	174	return in_dev;
	175	}
	176
1da177e4 LT	177	static __inline__ struct in_device *
	178	in_dev_get(const struct net_device *dev)
	179	{
	180	struct in_device *in_dev;
	181
	182	rcu_read_lock();
e5ed6399	183	in_dev = __in_dev_get_rcu(dev);
1da177e4 LT	184	if (in_dev)
	185	atomic_inc(&in_dev->refcnt);
	186	rcu_read_unlock();
	187	return in_dev;
	188	}
	189
	190	static __inline__ struct in_device *
e5ed6399	191	__in_dev_get_rtnl(const struct net_device *dev)
1da177e4 LT	192	{
	193	return (struct in_device*)dev->ip_ptr;
	194	}
	195
	196	extern void in_dev_finish_destroy(struct in_device *idev);
	197
	198	static inline void in_dev_put(struct in_device *idev)
	199	{
	200	if (atomic_dec_and_test(&idev->refcnt))
	201	in_dev_finish_destroy(idev);
	202	}
	203
	204	#define __in_dev_put(idev) atomic_dec(&(idev)->refcnt)
	205	#define in_dev_hold(idev) atomic_inc(&(idev)->refcnt)
	206
	207	#endif /* __KERNEL__ */
	208
60cad5da	209	static __inline__ __be32 inet_make_mask(int logmask)
1da177e4 LT	210	{
	211	if (logmask)
	212	return htonl(~((1<<(32-logmask))-1));
	213	return 0;
	214	}
	215
714e85be	216	static __inline__ int inet_mask_len(__be32 mask)
1da177e4	217	{
714e85be AV	218	__u32 hmask = ntohl(mask);
714e85be AV	219	if (!hmask)
1da177e4	220	return 0;
714e85be	221	return 32 - ffz(~hmask);
1da177e4 LT	222	}
	223
	224
	225	#endif /* _LINUX_INETDEVICE_H */