[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);
int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
			    const struct net_device *dev, int strict,
			    u32 banned_flags);

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

bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
				   const unsigned int prefix_len,
				   struct net_device *dev);

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,
		      u32 banned_flags);
int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
		    u32 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 inet6_dev *idev, const struct in6_addr *addr);
int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
void ipv6_ac_destroy_dev(struct inet6_dev *idev);
bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
			 const struct in6_addr *addr);
bool ipv6_chk_acast_addr_src(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;
}

static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
{
	struct inet6_dev *idev = __in6_dev_get(dev);

	return idev ? idev->nd_parms : NULL;
}

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_ll_all_nodes(const struct in6_addr *addr)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
	__be64 *p = (__be64 *)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
	__be64 *p = (__be64 *)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
	__be64 *p = (__be64 *)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);
c58da4c6 EK	65	int ipv6_chk_addr_and_flags(struct net net, const struct in6_addr addr,
	66	const struct net_device *dev, int strict,
	67	u32 banned_flags);
bfeade08	68
59fbb3a6	69	#if defined(CONFIG_IPV6_MIP6) \|\| defined(CONFIG_IPV6_MIP6_MODULE)
e8e54d3c	70	int ipv6_chk_home_addr(struct net net, const struct in6_addr addr);
65d4ed92	71	#endif
52eeeb84	72
7df37ff3 CB	73	bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
	74	const unsigned int prefix_len,
	75	struct net_device *dev);
	76
e8e54d3c JP	77	int ipv6_chk_prefix(const struct in6_addr addr, struct net_device dev);
	78
	79	struct inet6_ifaddr ipv6_get_ifaddr(struct net net,
	80	const struct in6_addr *addr,
	81	struct net_device *dev, int strict);
	82
	83	int ipv6_dev_get_saddr(struct net net, const struct net_device dev,
	84	const struct in6_addr *daddr, unsigned int srcprefs,
	85	struct in6_addr *saddr);
	86	int __ipv6_get_lladdr(struct inet6_dev idev, struct in6_addr addr,
479840ff	87	u32 banned_flags);
e8e54d3c	88	int ipv6_get_lladdr(struct net_device dev, struct in6_addr addr,
479840ff	89	u32 banned_flags);
e8e54d3c JP	90	int ipv6_rcv_saddr_equal(const struct sock sk, const struct sock sk2);
	91	void addrconf_join_solict(struct net_device dev, const struct in6_addr addr);
	92	void addrconf_leave_solict(struct inet6_dev idev, const struct in6_addr addr);
1da177e4	93
4bed72e4	94	static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95c96174	95	unsigned int unit)
4bed72e4 YH	96	{
	97	if (timeout == 0xffffffff)
	98	return ~0UL;
	99
	100	/*
	101	* Avoid arithmetic overflow.
	102	* Assuming unit is constant and non-zero, this "if" statement
	103	* will go away on 64bit archs.
	104	*/
	105	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
	106	return LONG_MAX / unit;
	107
	108	return timeout;
	109	}
	110
	111	static inline int addrconf_finite_timeout(unsigned long timeout)
	112	{
	113	return ~timeout;
	114	}
	115
2a8cc6c8 YH	116	/*
	117	* IPv6 Address Label subsystem (addrlabel.c)
	118	*/
e8e54d3c JP	119	int ipv6_addr_label_init(void);
	120	void ipv6_addr_label_cleanup(void);
	121	void ipv6_addr_label_rtnl_register(void);
	122	u32 ipv6_addr_label(struct net net, const struct in6_addr addr,
	123	int type, int ifindex);
2a8cc6c8	124
1da177e4 LT	125	/*
	126	* multicast prototypes (mcast.c)
	127	*/
e8e54d3c JP	128	int ipv6_sock_mc_join(struct sock *sk, int ifindex,
	129	const struct in6_addr *addr);
	130	int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
	131	const struct in6_addr *addr);
	132	void ipv6_sock_mc_close(struct sock *sk);
	133	bool inet6_mc_check(struct sock sk, const struct in6_addr mc_addr,
	134	const struct in6_addr *src_addr);
	135
	136	int ipv6_dev_mc_inc(struct net_device dev, const struct in6_addr addr);
	137	int __ipv6_dev_mc_dec(struct inet6_dev idev, const struct in6_addr addr);
	138	int ipv6_dev_mc_dec(struct net_device dev, const struct in6_addr addr);
	139	void ipv6_mc_up(struct inet6_dev *idev);
	140	void ipv6_mc_down(struct inet6_dev *idev);
	141	void ipv6_mc_unmap(struct inet6_dev *idev);
	142	void ipv6_mc_remap(struct inet6_dev *idev);
	143	void ipv6_mc_init_dev(struct inet6_dev *idev);
	144	void ipv6_mc_destroy_dev(struct inet6_dev *idev);
	145	void addrconf_dad_failure(struct inet6_ifaddr *ifp);
	146
	147	bool ipv6_chk_mcast_addr(struct net_device dev, const struct in6_addr group,
	148	const struct in6_addr *src_addr);
	149
	150	void ipv6_mc_dad_complete(struct inet6_dev *idev);
5f81bd2e CW	151
	152	/* A stub used by vxlan module. This is ugly, ideally these
	153	* symbols should be built into the core kernel.
	154	*/
	155	struct ipv6_stub {
	156	int (ipv6_sock_mc_join)(struct sock sk, int ifindex,
	157	const struct in6_addr *addr);
	158	int (ipv6_sock_mc_drop)(struct sock sk, int ifindex,
	159	const struct in6_addr *addr);
	160	int (ipv6_dst_lookup)(struct sock sk, struct dst_entry **dst,
	161	struct flowi6 *fl6);
	162	void (*udpv6_encap_enable)(void);
f564f45c CW	163	void (ndisc_send_na)(struct net_device dev, struct neighbour *neigh,
	164	const struct in6_addr *daddr,
	165	const struct in6_addr *solicited_addr,
	166	bool router, bool solicited, bool override, bool inc_opt);
e15a00aa	167	struct neigh_table *nd_tbl;
5f81bd2e CW	168	};
	169	extern const struct ipv6_stub *ipv6_stub __read_mostly;
	170
daad1512 YH	171	/*
	172	* identify MLD packets for MLD filter exceptions
	173	*/
	174	static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
	175	{
	176	struct icmp6hdr *hdr;
	177
	178	if (nexthdr != IPPROTO_ICMPV6 \|\|
	179	!pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
	180	return false;
	181
	182	hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
	183
	184	switch (hdr->icmp6_type) {
	185	case ICMPV6_MGM_QUERY:
	186	case ICMPV6_MGM_REPORT:
	187	case ICMPV6_MGM_REDUCTION:
	188	case ICMPV6_MLD2_REPORT:
	189	return true;
	190	default:
	191	break;
	192	}
	193	return false;
	194	}
1da177e4	195
e8e54d3c JP	196	void addrconf_prefix_rcv(struct net_device *dev,
e8e54d3c JP	197	u8 *opt, int len, bool sllao);
1da177e4	198
1da177e4 LT	199	/*
	200	* anycast prototypes (anycast.c)
	201	*/
e8e54d3c JP	202	int ipv6_sock_ac_join(struct sock *sk, int ifindex,
	203	const struct in6_addr *addr);
	204	int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
	205	const struct in6_addr *addr);
	206	void ipv6_sock_ac_close(struct sock *sk);
	207
013b4d90	208	int __ipv6_dev_ac_inc(struct inet6_dev idev, const struct in6_addr addr);
e8e54d3c	209	int __ipv6_dev_ac_dec(struct inet6_dev idev, const struct in6_addr addr);
381f4dca	210	void ipv6_ac_destroy_dev(struct inet6_dev *idev);
e8e54d3c	211	bool ipv6_chk_acast_addr(struct net net, struct net_device dev,
7c90cc2d FLB	212	const struct in6_addr *addr);
	213	bool ipv6_chk_acast_addr_src(struct net net, struct net_device dev,
	214	const struct in6_addr *addr);
1da177e4 LT	215
1da177e4 LT	216	/* Device notifier */
e8e54d3c JP	217	int register_inet6addr_notifier(struct notifier_block *nb);
	218	int unregister_inet6addr_notifier(struct notifier_block *nb);
	219	int inet6addr_notifier_call_chain(unsigned long val, void *v);
1da177e4	220
e8e54d3c JP	221	void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
e8e54d3c JP	222	struct ipv6_devconf *devconf);
d67b8c61	223
48daa3bb ED	224	/**
	225	* __in6_dev_get - get inet6_dev pointer from netdevice
	226	* @dev: network device
	227	*
	228	* Caller must hold rcu_read_lock or RTNL, because this function
	229	* does not take a reference on the inet6_dev.
	230	*/
	231	static inline struct inet6_dev __in6_dev_get(const struct net_device dev)
1da177e4	232	{
48daa3bb	233	return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4 LT	234	}
1da177e4 LT	235
48daa3bb ED	236	/**
	237	* in6_dev_get - get inet6_dev pointer from netdevice
	238	* @dev: network device
	239	*
	240	* This version can be used in any context, and takes a reference
	241	* on the inet6_dev. Callers must use in6_dev_put() later to
	242	* release this reference.
	243	*/
	244	static inline struct inet6_dev in6_dev_get(const struct net_device dev)
1da177e4	245	{
48daa3bb ED	246	struct inet6_dev *idev;
48daa3bb ED	247
8814c4b5	248	rcu_read_lock();
48daa3bb	249	idev = rcu_dereference(dev->ip6_ptr);
1da177e4 LT	250	if (idev)
1da177e4 LT	251	atomic_inc(&idev->refcnt);
8814c4b5	252	rcu_read_unlock();
1da177e4 LT	253	return idev;
	254	}
	255
bba24896 JP	256	static inline struct neigh_parms __in6_dev_nd_parms_get_rcu(const struct net_device dev)
	257	{
	258	struct inet6_dev *idev = __in6_dev_get(dev);
	259
	260	return idev ? idev->nd_parms : NULL;
	261	}
	262
e8e54d3c	263	void in6_dev_finish_destroy(struct inet6_dev *idev);
1da177e4	264
48daa3bb	265	static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4 LT	266	{
	267	if (atomic_dec_and_test(&idev->refcnt))
	268	in6_dev_finish_destroy(idev);
	269	}
	270
48daa3bb ED	271	static inline void __in6_dev_put(struct inet6_dev *idev)
	272	{
	273	atomic_dec(&idev->refcnt);
	274	}
1da177e4	275
48daa3bb ED	276	static inline void in6_dev_hold(struct inet6_dev *idev)
	277	{
	278	atomic_inc(&idev->refcnt);
	279	}
1da177e4	280
e8e54d3c	281	void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
1da177e4 LT	282
	283	static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
	284	{
	285	if (atomic_dec_and_test(&ifp->refcnt))
	286	inet6_ifa_finish_destroy(ifp);
	287	}
	288
48daa3bb ED	289	static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
	290	{
	291	atomic_dec(&ifp->refcnt);
	292	}
1da177e4	293
48daa3bb ED	294	static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
	295	{
	296	atomic_inc(&ifp->refcnt);
	297	}
1da177e4	298
1da177e4 LT	299
	300	/*
	301	* compute link-local solicited-node multicast address
	302	*/
	303
	304	static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
	305	struct in6_addr *solicited)
	306	{
	307	ipv6_addr_set(solicited,
0e7b8dcd YH	308	htonl(0xFF020000), 0,
	309	htonl(0x1),
	310	htonl(0xFF000000) \| addr->s6_addr32[3]);
1da177e4 LT	311	}
1da177e4 LT	312
b27b28cb	313	static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
1da177e4	314	{
d1641565	315	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	316	__be64 p = (__be64 )addr;
d1641565 YH	317	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(1))) == 0UL;
d1641565 YH	318	#else
48daa3bb	319	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	320	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	321	(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
d1641565	322	#endif
1da177e4 LT	323	}
1da177e4 LT	324
b27b28cb	325	static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
1da177e4	326	{
d1641565	327	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	328	__be64 p = (__be64 )addr;
d1641565 YH	329	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \| (p[1] ^ cpu_to_be64(2))) == 0UL;
d1641565 YH	330	#else
48daa3bb	331	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
fed85383	332	addr->s6_addr32[1] \| addr->s6_addr32[2] \|
48daa3bb	333	(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
d1641565	334	#endif
1da177e4 LT	335	}
1da177e4 LT	336
b27b28cb	337	static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0	338	{
48daa3bb	339	return (addr->s6_addr32[2] \| htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0 FT	340	}
c7dc89c0 FT	341
ca97a644 YH	342	static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
ca97a644 YH	343	{
9d100774	344	#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959	345	__be64 p = (__be64 )addr;
9d100774 YH	346	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) \|
	347	((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
	348	cpu_to_be64(0xffffffffff000000UL))) == 0UL;
	349	#else
	350	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) \|
	351	addr->s6_addr32[1] \|
	352	(addr->s6_addr32[2] ^ htonl(0x00000001)) \|
	353	(addr->s6_addr[12] ^ 0xff)) == 0;
	354	#endif
ca97a644 YH	355	}
ca97a644 YH	356
20380731	357	#ifdef CONFIG_PROC_FS
e8e54d3c JP	358	int if6_proc_init(void);
e8e54d3c JP	359	void if6_proc_exit(void);
20380731 ACM	360	#endif
20380731 ACM	361
1da177e4	362	#endif