[deliverable/linux.git] / include / net / addrconf.h

#ifndef _ADDRCONF_H
#define _ADDRCONF_H

#define MAX_RTR_SOLICITATIONS		3
#define RTR_SOLICITATION_INTERVAL	(4*HZ)

#define MIN_VALID_LIFETIME		(2*3600)	/* 2 hours */

#define TEMP_VALID_LIFETIME		(7*86400)
#define TEMP_PREFERRED_LIFETIME		(86400)
#define REGEN_MAX_RETRY			(3)
#define MAX_DESYNC_FACTOR		(600)

#define ADDR_CHECK_FREQUENCY		(120*HZ)

#define IPV6_MAX_ADDRESSES		16

#define ADDRCONF_TIMER_FUZZ_MINUS	(HZ > 50 ? HZ / 50 : 1)
#define ADDRCONF_TIMER_FUZZ		(HZ / 4)
#define ADDRCONF_TIMER_FUZZ_MAX		(HZ)

#include <linux/in.h>
#include <linux/in6.h>

struct prefix_info {
	__u8			type;
	__u8			length;
	__u8			prefix_len;

#if defined(__BIG_ENDIAN_BITFIELD)
	__u8			onlink : 1,
			 	autoconf : 1,
				reserved : 6;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	__u8			reserved : 6,
				autoconf : 1,
				onlink : 1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
	__be32			valid;
	__be32			prefered;
	__be32			reserved2;

	struct in6_addr		prefix;
};


#include <linux/netdevice.h>
#include <net/if_inet6.h>
#include <net/ipv6.h>

#define IN6_ADDR_HSIZE_SHIFT	4
#define IN6_ADDR_HSIZE		(1 << IN6_ADDR_HSIZE_SHIFT)

int addrconf_init(void);
void addrconf_cleanup(void);

int addrconf_add_ifaddr(struct net *net, void __user *arg);
int addrconf_del_ifaddr(struct net *net, void __user *arg);
int addrconf_set_dstaddr(struct net *net, void __user *arg);

int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
		  const struct net_device *dev, int strict);

#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
#endif

int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);

struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
				     const struct in6_addr *addr,
				     struct net_device *dev, int strict);

int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
		       const struct in6_addr *daddr, unsigned int srcprefs,
		       struct in6_addr *saddr);
int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
		      unsigned char banned_flags);
int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
		    unsigned char banned_flags);
int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2);
void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);

static inline unsigned long addrconf_timeout_fixup(u32 timeout,
						   unsigned int unit)
{
	if (timeout == 0xffffffff)
		return ~0UL;

	/*
	 * Avoid arithmetic overflow.
	 * Assuming unit is constant and non-zero, this "if" statement
	 * will go away on 64bit archs.
	 */
	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
		return LONG_MAX / unit;

	return timeout;
}

static inline int addrconf_finite_timeout(unsigned long timeout)
{
	return ~timeout;
}

/*
 *	IPv6 Address Label subsystem (addrlabel.c)
 */
int ipv6_addr_label_init(void);
void ipv6_addr_label_cleanup(void);
void ipv6_addr_label_rtnl_register(void);
u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
		    int type, int ifindex);

/*
 *	multicast prototypes (mcast.c)
 */
int ipv6_sock_mc_join(struct sock *sk, int ifindex,
		      const struct in6_addr *addr);
int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
		      const struct in6_addr *addr);
void ipv6_sock_mc_close(struct sock *sk);
bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
		    const struct in6_addr *src_addr);

int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
void ipv6_mc_up(struct inet6_dev *idev);
void ipv6_mc_down(struct inet6_dev *idev);
void ipv6_mc_unmap(struct inet6_dev *idev);
void ipv6_mc_remap(struct inet6_dev *idev);
void ipv6_mc_init_dev(struct inet6_dev *idev);
void ipv6_mc_destroy_dev(struct inet6_dev *idev);
void addrconf_dad_failure(struct inet6_ifaddr *ifp);

bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
			 const struct in6_addr *src_addr);

void ipv6_mc_dad_complete(struct inet6_dev *idev);

/* A stub used by vxlan module. This is ugly, ideally these
 * symbols should be built into the core kernel.
 */
struct ipv6_stub {
	int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
				 const struct in6_addr *addr);
	int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
				 const struct in6_addr *addr);
	int (*ipv6_dst_lookup)(struct sock *sk, struct dst_entry **dst,
				struct flowi6 *fl6);
	void (*udpv6_encap_enable)(void);
	void (*ndisc_send_na)(struct net_device *dev, struct neighbour *neigh,
			      const struct in6_addr *daddr,
			      const struct in6_addr *solicited_addr,
			      bool router, bool solicited, bool override, bool inc_opt);
	struct neigh_table *nd_tbl;
};
extern const struct ipv6_stub *ipv6_stub __read_mostly;

/*
 * identify MLD packets for MLD filter exceptions
 */
static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
{
	struct icmp6hdr *hdr;

	if (nexthdr != IPPROTO_ICMPV6 ||
	    !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
		return false;

	hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);

	switch (hdr->icmp6_type) {
	case ICMPV6_MGM_QUERY:
	case ICMPV6_MGM_REPORT:
	case ICMPV6_MGM_REDUCTION:
	case ICMPV6_MLD2_REPORT:
		return true;
	default:
		break;
	}
	return false;
}

void addrconf_prefix_rcv(struct net_device *dev,
			 u8 *opt, int len, bool sllao);

/*
 *	anycast prototypes (anycast.c)
 */
int ipv6_sock_ac_join(struct sock *sk, int ifindex,
		      const struct in6_addr *addr);
int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
		      const struct in6_addr *addr);
void ipv6_sock_ac_close(struct sock *sk);

int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
				const struct in6_addr *addr);


/* Device notifier */
int register_inet6addr_notifier(struct notifier_block *nb);
int unregister_inet6addr_notifier(struct notifier_block *nb);
int inet6addr_notifier_call_chain(unsigned long val, void *v);

void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
				  struct ipv6_devconf *devconf);

/**
 * __in6_dev_get - get inet6_dev pointer from netdevice
 * @dev: network device
 *
 * Caller must hold rcu_read_lock or RTNL, because this function
 * does not take a reference on the inet6_dev.
 */
static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
{
	return rcu_dereference_rtnl(dev->ip6_ptr);
}

/**
 * in6_dev_get - get inet6_dev pointer from netdevice
 * @dev: network device
 *
 * This version can be used in any context, and takes a reference
 * on the inet6_dev. Callers must use in6_dev_put() later to
 * release this reference.
 */
static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
{
	struct inet6_dev *idev;

	rcu_read_lock();
	idev = rcu_dereference(dev->ip6_ptr);
	if (idev)
		atomic_inc(&idev->refcnt);
	rcu_read_unlock();
	return idev;
}

void in6_dev_finish_destroy(struct inet6_dev *idev);

static inline void in6_dev_put(struct inet6_dev *idev)
{
	if (atomic_dec_and_test(&idev->refcnt))
		in6_dev_finish_destroy(idev);
}

static inline void __in6_dev_put(struct inet6_dev *idev)
{
	atomic_dec(&idev->refcnt);
}

static inline void in6_dev_hold(struct inet6_dev *idev)
{
	atomic_inc(&idev->refcnt);
}

void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);

static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
{
	if (atomic_dec_and_test(&ifp->refcnt))
		inet6_ifa_finish_destroy(ifp);
}

static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
{
	atomic_dec(&ifp->refcnt);
}

static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
{
	atomic_inc(&ifp->refcnt);
}


/*
 *	compute link-local solicited-node multicast address
 */

static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
					     struct in6_addr *solicited)
{
	ipv6_addr_set(solicited,
		      htonl(0xFF020000), 0,
		      htonl(0x1),
		      htonl(0xFF000000) | addr->s6_addr32[3]);
}

static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
{
	return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
}

static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	__u64 *p = (__u64 *)addr;
	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
#else
	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
		addr->s6_addr32[1] | addr->s6_addr32[2] |
		(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
#endif
}

static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	__u64 *p = (__u64 *)addr;
	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
#else
	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
		addr->s6_addr32[1] | addr->s6_addr32[2] |
		(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
#endif
}

static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
{
	return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
}

static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	__u64 *p = (__u64 *)addr;
	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
		((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
		 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
#else
	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
		addr->s6_addr32[1] |
		(addr->s6_addr32[2] ^ htonl(0x00000001)) |
		(addr->s6_addr[12] ^ 0xff)) == 0;
#endif
}

#ifdef CONFIG_PROC_FS
int if6_proc_init(void);
void if6_proc_exit(void);
#endif

#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _ADDRCONF_H
	2	#define _ADDRCONF_H
	3
1da177e4 LT	4	#define MAX_RTR_SOLICITATIONS 3
	5	#define RTR_SOLICITATION_INTERVAL (4*HZ)
	6
	7	#define MIN_VALID_LIFETIME (23600) / 2 hours */
	8
	9	#define TEMP_VALID_LIFETIME (7*86400)
	10	#define TEMP_PREFERRED_LIFETIME (86400)
76f793e3	11	#define REGEN_MAX_RETRY (3)
1da177e4 LT	12	#define MAX_DESYNC_FACTOR (600)
	13
	14	#define ADDR_CHECK_FREQUENCY (120*HZ)
	15
	16	#define IPV6_MAX_ADDRESSES 16
	17
5c766d64 JP	18	#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1)
	19	#define ADDRCONF_TIMER_FUZZ (HZ / 4)
	20	#define ADDRCONF_TIMER_FUZZ_MAX (HZ)
	21
c7dc89c0	22	#include <linux/in.h>
6a800d45 PM	23	#include <linux/in6.h>
6a800d45 PM	24
1da177e4 LT	25	struct prefix_info {
	26	__u8 type;
	27	__u8 length;
	28	__u8 prefix_len;
	29
	30	#if defined(__BIG_ENDIAN_BITFIELD)
	31	__u8 onlink : 1,
	32	autoconf : 1,
	33	reserved : 6;
	34	#elif defined(__LITTLE_ENDIAN_BITFIELD)
	35	__u8 reserved : 6,
	36	autoconf : 1,
	37	onlink : 1;
	38	#else
	39	#error "Please fix <asm/byteorder.h>"
	40	#endif
e69a4adc AV	41	__be32 valid;
	42	__be32 prefered;
	43	__be32 reserved2;
1da177e4 LT	44
	45	struct in6_addr prefix;
	46	};
	47
	48
1da177e4 LT	49	#include <linux/netdevice.h>
1da177e4 LT	50	#include <net/if_inet6.h>
e4553edd	51	#include <net/ipv6.h>
1da177e4	52
ddbe5032 ED	53	#define IN6_ADDR_HSIZE_SHIFT 4
ddbe5032 ED	54	#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
1da177e4	55
e8e54d3c JP	56	int addrconf_init(void);
e8e54d3c JP	57	void addrconf_cleanup(void);
1da177e4	58
e8e54d3c JP	59	int addrconf_add_ifaddr(struct net net, void __user arg);
	60	int addrconf_del_ifaddr(struct net net, void __user arg);
	61	int addrconf_set_dstaddr(struct net net, void __user arg);
1da177e4	62
e8e54d3c JP	63	int ipv6_chk_addr(struct net net, const struct in6_addr addr,
e8e54d3c JP	64	const struct net_device *dev, int strict);
bfeade08	65
59fbb3a6	66	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
e8e54d3c	67	int ipv6_chk_home_addr(struct net net, const struct in6_addr addr);
65d4ed92	68	#endif
52eeeb84	69
e8e54d3c JP	70	int ipv6_chk_prefix(const struct in6_addr addr, struct net_device dev);
	71
	72	struct inet6_ifaddr ipv6_get_ifaddr(struct net net,
	73	const struct in6_addr *addr,
	74	struct net_device *dev, int strict);
	75
	76	int ipv6_dev_get_saddr(struct net net, const struct net_device dev,
	77	const struct in6_addr *daddr, unsigned int srcprefs,
	78	struct in6_addr *saddr);
	79	int __ipv6_get_lladdr(struct inet6_dev idev, struct in6_addr addr,
	80	unsigned char banned_flags);
	81	int ipv6_get_lladdr(struct net_device dev, struct in6_addr addr,
	82	unsigned char banned_flags);
	83	int ipv6_rcv_saddr_equal(const struct sock sk, const struct sock sk2);
	84	void addrconf_join_solict(struct net_device dev, const struct in6_addr addr);
	85	void addrconf_leave_solict(struct inet6_dev idev, const struct in6_addr addr);
1da177e4	86
4bed72e4	87	static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95c96174	88	unsigned int unit)
4bed72e4 YH	89	{
	90	if (timeout == 0xffffffff)
	91	return ~0UL;
	92
	93	/*
	94	* Avoid arithmetic overflow.
	95	* Assuming unit is constant and non-zero, this "if" statement
	96	* will go away on 64bit archs.
	97	*/
	98	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
	99	return LONG_MAX / unit;
	100
	101	return timeout;
	102	}
	103
	104	static inline int addrconf_finite_timeout(unsigned long timeout)
	105	{
	106	return ~timeout;
	107	}
	108
2a8cc6c8 YH	109	/*
	110	* IPv6 Address Label subsystem (addrlabel.c)
	111	*/
e8e54d3c JP	112	int ipv6_addr_label_init(void);
	113	void ipv6_addr_label_cleanup(void);
	114	void ipv6_addr_label_rtnl_register(void);
	115	u32 ipv6_addr_label(struct net net, const struct in6_addr addr,
	116	int type, int ifindex);
2a8cc6c8	117
1da177e4 LT	118	/*
	119	* multicast prototypes (mcast.c)
	120	*/
e8e54d3c JP	121	int ipv6_sock_mc_join(struct sock *sk, int ifindex,
	122	const struct in6_addr *addr);
	123	int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
	124	const struct in6_addr *addr);
	125	void ipv6_sock_mc_close(struct sock *sk);
	126	bool inet6_mc_check(struct sock sk, const struct in6_addr mc_addr,
	127	const struct in6_addr *src_addr);
	128
	129	int ipv6_dev_mc_inc(struct net_device dev, const struct in6_addr addr);
	130	int __ipv6_dev_mc_dec(struct inet6_dev idev, const struct in6_addr addr);
	131	int ipv6_dev_mc_dec(struct net_device dev, const struct in6_addr addr);
	132	void ipv6_mc_up(struct inet6_dev *idev);
	133	void ipv6_mc_down(struct inet6_dev *idev);
	134	void ipv6_mc_unmap(struct inet6_dev *idev);
	135	void ipv6_mc_remap(struct inet6_dev *idev);
	136	void ipv6_mc_init_dev(struct inet6_dev *idev);
	137	void ipv6_mc_destroy_dev(struct inet6_dev *idev);
	138	void addrconf_dad_failure(struct inet6_ifaddr *ifp);
	139
	140	bool ipv6_chk_mcast_addr(struct net_device dev, const struct in6_addr group,
	141	const struct in6_addr *src_addr);
	142
	143	void ipv6_mc_dad_complete(struct inet6_dev *idev);
5f81bd2e CW	144
	145	/* A stub used by vxlan module. This is ugly, ideally these
	146	* symbols should be built into the core kernel.
	147	*/
	148	struct ipv6_stub {
	149	int (ipv6_sock_mc_join)(struct sock sk, int ifindex,
	150	const struct in6_addr *addr);
	151	int (ipv6_sock_mc_drop)(struct sock sk, int ifindex,
	152	const struct in6_addr *addr);
	153	int (ipv6_dst_lookup)(struct sock sk, struct dst_entry **dst,
	154	struct flowi6 *fl6);
	155	void (*udpv6_encap_enable)(void);
f564f45c CW	156	void (ndisc_send_na)(struct net_device dev, struct neighbour *neigh,
	157	const struct in6_addr *daddr,
	158	const struct in6_addr *solicited_addr,
	159	bool router, bool solicited, bool override, bool inc_opt);
e15a00aa	160	struct neigh_table *nd_tbl;
5f81bd2e CW	161	};
	162	extern const struct ipv6_stub *ipv6_stub __read_mostly;
	163
daad1512 YH	164	/*
	165	* identify MLD packets for MLD filter exceptions
	166	*/
	167	static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
	168	{
	169	struct icmp6hdr *hdr;
	170
	171	if (nexthdr != IPPROTO_ICMPV6 \|\|
	172	!pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
	173	return false;
	174
	175	hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
	176
	177	switch (hdr->icmp6_type) {
	178	case ICMPV6_MGM_QUERY:
	179	case ICMPV6_MGM_REPORT:
	180	case ICMPV6_MGM_REDUCTION:
	181	case ICMPV6_MLD2_REPORT:
	182	return true;
	183	default:
	184	break;
	185	}
	186	return false;
	187	}
1da177e4	188
e8e54d3c JP	189	void addrconf_prefix_rcv(struct net_device *dev,
e8e54d3c JP	190	u8 *opt, int len, bool sllao);
1da177e4	191
1da177e4 LT	192	/*
	193	* anycast prototypes (anycast.c)
	194	*/
e8e54d3c JP	195	int ipv6_sock_ac_join(struct sock *sk, int ifindex,
	196	const struct in6_addr *addr);
	197	int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
	198	const struct in6_addr *addr);
	199	void ipv6_sock_ac_close(struct sock *sk);
	200
	201	int ipv6_dev_ac_inc(struct net_device dev, const struct in6_addr addr);
	202	int __ipv6_dev_ac_dec(struct inet6_dev idev, const struct in6_addr addr);
	203	bool ipv6_chk_acast_addr(struct net net, struct net_device dev,
a50feda5	204	const struct in6_addr *addr);
1da177e4 LT	205
	206
	207	/* Device notifier */
e8e54d3c JP	208	int register_inet6addr_notifier(struct notifier_block *nb);
	209	int unregister_inet6addr_notifier(struct notifier_block *nb);
	210	int inet6addr_notifier_call_chain(unsigned long val, void *v);
1da177e4	211
e8e54d3c JP	212	void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
e8e54d3c JP	213	struct ipv6_devconf *devconf);
d67b8c61	214
48daa3bb ED	215	/**
	216	* __in6_dev_get - get inet6_dev pointer from netdevice
	217	* @dev: network device
	218	*
	219	* Caller must hold rcu_read_lock or RTNL, because this function
	220	* does not take a reference on the inet6_dev.
	221	*/
	222	static inline struct inet6_dev __in6_dev_get(const struct net_device dev)
1da177e4	223	{
48daa3bb	224	return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4 LT	225	}
1da177e4 LT	226
48daa3bb ED	227	/**
	228	* in6_dev_get - get inet6_dev pointer from netdevice
	229	* @dev: network device
	230	*
	231	* This version can be used in any context, and takes a reference
	232	* on the inet6_dev. Callers must use in6_dev_put() later to
	233	* release this reference.
	234	*/
	235	static inline struct inet6_dev in6_dev_get(const struct net_device dev)
1da177e4	236	{
48daa3bb ED	237	struct inet6_dev *idev;
48daa3bb ED	238
8814c4b5	239	rcu_read_lock();
48daa3bb	240	idev = rcu_dereference(dev->ip6_ptr);
1da177e4 LT	241	if (idev)
1da177e4 LT	242	atomic_inc(&idev->refcnt);
8814c4b5	243	rcu_read_unlock();
1da177e4 LT	244	return idev;
	245	}
	246
e8e54d3c	247	void in6_dev_finish_destroy(struct inet6_dev *idev);
1da177e4	248
48daa3bb	249	static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4 LT	250	{
	251	if (atomic_dec_and_test(&idev->refcnt))
	252	in6_dev_finish_destroy(idev);
	253	}
	254
48daa3bb ED	255	static inline void __in6_dev_put(struct inet6_dev *idev)
	256	{
	257	atomic_dec(&idev->refcnt);
	258	}
1da177e4	259
48daa3bb ED	260	static inline void in6_dev_hold(struct inet6_dev *idev)
	261	{
	262	atomic_inc(&idev->refcnt);
	263	}
1da177e4	264
e8e54d3c	265	void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
1da177e4 LT	266
	267	static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
	268	{
	269	if (atomic_dec_and_test(&ifp->refcnt))
	270	inet6_ifa_finish_destroy(ifp);
	271	}
	272
48daa3bb ED	273	static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
	274	{
	275	atomic_dec(&ifp->refcnt);
	276	}
1da177e4	277
48daa3bb ED	278	static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
	279	{
	280	atomic_inc(&ifp->refcnt);
	281	}
1da177e4	282
1da177e4 LT	283
	284	/*
	285	* compute link-local solicited-node multicast address
	286	*/
	287
	288	static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
	289	struct in6_addr *solicited)
	290	{
	291	ipv6_addr_set(solicited,
0e7b8dcd YH	292	htonl(0xFF020000), 0,
	293	htonl(0x1),
	294	htonl(0xFF000000) \| addr->s6_addr32[3]);
1da177e4 LT	295	}
1da177e4 LT	296
b27b28cb	297	static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
1da177e4	298	{
0e7b8dcd	299	return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
1da177e4 LT	300	}
1da177e4 LT	301
b27b28cb	302	static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
1da177e4	303	{
d1641565 YH	304	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	305	__u64 p = (__u64 )addr;
	306	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(1))) == 0UL;
	307	#else
48daa3bb	308	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	309	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	310	(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
d1641565	311	#endif
1da177e4 LT	312	}
1da177e4 LT	313
b27b28cb	314	static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
1da177e4	315	{
d1641565 YH	316	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	317	__u64 p = (__u64 )addr;
	318	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(2))) == 0UL;
	319	#else
48daa3bb	320	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	321	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	322	(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
d1641565	323	#endif
1da177e4 LT	324	}
1da177e4 LT	325
b27b28cb	326	static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0	327	{
48daa3bb	328	return (addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0 FT	329	}
c7dc89c0 FT	330
ca97a644 YH	331	static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
ca97a644 YH	332	{
9d100774 YH	333	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	334	__u64 p = (__u64 )addr;
	335	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \|
	336	((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
	337	cpu_to_be64(0xffffffffff000000UL))) == 0UL;
	338	#else
	339	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
	340	addr->s6_addr32[1] \|
	341	(addr->s6_addr32[2] ^ htonl(0x00000001)) \|
	342	(addr->s6_addr[12] ^ 0xff)) == 0;
	343	#endif
ca97a644 YH	344	}
ca97a644 YH	345
20380731	346	#ifdef CONFIG_PROC_FS
e8e54d3c JP	347	int if6_proc_init(void);
e8e54d3c JP	348	void if6_proc_exit(void);
20380731 ACM	349	#endif
20380731 ACM	350
1da177e4	351	#endif