[net-next-2.6.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);
};

extern struct ipv4_devconf ipv4_devconf;

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    */
	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(in_dev->dev->nd_net, attr) && \
	 IN_DEV_CONF_GET((in_dev), attr))
#define IN_DEV_ORCONF(in_dev, attr) \
	(IPV4_DEVCONF_ALL(in_dev->dev->nd_net, attr) || \
	 IN_DEV_CONF_GET((in_dev), attr))
#define IN_DEV_MAXCONF(in_dev, attr) \
	(max(IPV4_DEVCONF_ALL(in_dev->dev->nd_net, 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)

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