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

#ifndef _LINUX_INETDEVICE_H
#define _LINUX_INETDEVICE_H

#ifdef __KERNEL__

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

struct ipv4_devconf
{
	void	*sysctl;
	int	data[__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(attr) IPV4_DEVCONF(ipv4_devconf, 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--;
	in_dev->cnf.data[index] = val;
}

#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(attr) && IN_DEV_CONF_GET((in_dev), attr))
#define IN_DEV_ORCONF(in_dev, attr) \
	(IPV4_DEVCONF_ALL(attr) || IN_DEV_CONF_GET((in_dev), attr))
#define IN_DEV_MAXCONF(in_dev, attr) \
	(max(IPV4_DEVCONF_ALL(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)		(IPV4_DEVCONF_ALL(MC_FORWARDING) && \
					 IPV4_DEVCONF((in_dev)->cnf, \
						      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_init(struct net_device *dev);
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);
extern void		inet_forward_change(void);

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