Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 571 insertions, 0 deletions

diff --git a/include/net/addrconf.h b/include/net/addrconf.h
new file mode 100644
index 000000000..e67642459
--- /dev/null
+++ b/include/net/addrconf.h
@@ -0,0 +1,571 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ADDRCONF_H
+#define _ADDRCONF_H
+
+#define MAX_RTR_SOLICITATIONS		-1		/* unlimited */
+#define RTR_SOLICITATION_INTERVAL	(4*HZ)
+#define RTR_SOLICITATION_MAX_INTERVAL	(3600*HZ)	/* 1 hour */
+
+#define MIN_VALID_LIFETIME		(2*3600)	/* 2 hours */
+
+/* TEMP_VALID_LIFETIME default value as specified in RFC 8981 3.8 */
+#define TEMP_VALID_LIFETIME		(2*86400)       /* 2 days */
+#define TEMP_PREFERRED_LIFETIME		(86400)         /* 24 hours */
+#define REGEN_MIN_ADVANCE		(2)             /* 2 seconds */
+#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)
+
+#define ADDRCONF_NOTIFY_PRIORITY	0
+
+#include <linux/in.h>
+#include <linux/in6.h>
+
+struct prefix_info {
+	__u8			type;
+	__u8			length;
+	__u8			prefix_len;
+
+	union __packed {
+		__u8		flags;
+		struct __packed {
+#if defined(__BIG_ENDIAN_BITFIELD)
+			__u8	onlink : 1,
+				autoconf : 1,
+				routeraddr : 1,
+				preferpd : 1,
+				reserved : 4;
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
+			__u8	reserved : 4,
+				preferpd : 1,
+				routeraddr : 1,
+				autoconf : 1,
+				onlink : 1;
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
+		};
+	};
+	__be32			valid;
+	__be32			prefered;
+	__be32			reserved2;
+
+	struct in6_addr		prefix;
+};
+
+/* rfc4861 4.6.2: IPv6 PIO is 32 bytes in size */
+static_assert(sizeof(struct prefix_info) == 32);
+
+#include <linux/ipv6.h>
+#include <linux/netdevice.h>
+#include <net/if_inet6.h>
+#include <net/ipv6.h>
+
+struct in6_validator_info {
+	struct in6_addr		i6vi_addr;
+	struct inet6_dev	*i6vi_dev;
+	struct netlink_ext_ack	*extack;
+};
+
+struct ifa6_config {
+	const struct in6_addr	*pfx;
+	unsigned int		plen;
+
+	u8			ifa_proto;
+
+	const struct in6_addr	*peer_pfx;
+
+	u32			rt_priority;
+	u32			ifa_flags;
+	u32			preferred_lft;
+	u32			valid_lft;
+	u16			scope;
+};
+
+enum addr_type_t {
+	UNICAST_ADDR,
+	MULTICAST_ADDR,
+	ANYCAST_ADDR,
+};
+
+struct inet6_fill_args {
+	u32 portid;
+	u32 seq;
+	int event;
+	unsigned int flags;
+	int netnsid;
+	int ifindex;
+	enum addr_type_t type;
+	bool force_rt_scope_universe;
+};
+
+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, bool skip_dev_check,
+			    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
+
+int ipv6_chk_rpl_srh_loop(struct net *net, const struct in6_addr *segs,
+			  unsigned char nsegs);
+
+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 net_device *ipv6_dev_find(struct net *net, 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 net_device *dev, struct in6_addr *addr,
+		    u32 banned_flags);
+bool inet_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
+			  bool match_wildcard);
+bool inet_rcv_saddr_any(const struct sock *sk);
+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);
+
+void addrconf_add_linklocal(struct inet6_dev *idev,
+			    const struct in6_addr *addr, u32 flags);
+
+int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
+				 const struct prefix_info *pinfo,
+				 struct inet6_dev *in6_dev,
+				 const struct in6_addr *addr, int addr_type,
+				 u32 addr_flags, bool sllao, bool tokenized,
+				 __u32 valid_lft, u32 prefered_lft);
+
+static inline void addrconf_addr_eui48_base(u8 *eui, const char *const addr)
+{
+	memcpy(eui, addr, 3);
+	eui[3] = 0xFF;
+	eui[4] = 0xFE;
+	memcpy(eui + 5, addr + 3, 3);
+}
+
+static inline void addrconf_addr_eui48(u8 *eui, const char *const addr)
+{
+	addrconf_addr_eui48_base(eui, addr);
+	eui[0] ^= 2;
+}
+
+static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
+{
+	if (dev->addr_len != ETH_ALEN)
+		return -1;
+
+	/*
+	 * The zSeries OSA network cards can be shared among various
+	 * OS instances, but the OSA cards have only one MAC address.
+	 * This leads to duplicate address conflicts in conjunction
+	 * with IPv6 if more than one instance uses the same card.
+	 *
+	 * The driver for these cards can deliver a unique 16-bit
+	 * identifier for each instance sharing the same card.  It is
+	 * placed instead of 0xFFFE in the interface identifier.  The
+	 * "u" bit of the interface identifier is not inverted in this
+	 * case.  Hence the resulting interface identifier has local
+	 * scope according to RFC2373.
+	 */
+
+	addrconf_addr_eui48_base(eui, dev->dev_addr);
+
+	if (dev->dev_id) {
+		eui[3] = (dev->dev_id >> 8) & 0xFF;
+		eui[4] = dev->dev_id & 0xFF;
+	} else {
+		eui[0] ^= 2;
+	}
+
+	return 0;
+}
+
+#define INFINITY_LIFE_TIME 0xFFFFFFFF
+
+static inline unsigned long addrconf_timeout_fixup(u32 timeout,
+						   unsigned int unit)
+{
+	if (timeout == INFINITY_LIFE_TIME)
+		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);
+int 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)
+ */
+static inline bool ipv6_mc_may_pull(struct sk_buff *skb,
+				    unsigned int len)
+{
+	if (skb_transport_offset(skb) + ipv6_transport_len(skb) < len)
+		return false;
+
+	return pskb_may_pull(skb, len);
+}
+
+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);
+void ipv6_sock_mc_close(struct sock *sk);
+bool inet6_mc_check(const 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);
+int ipv6_mc_check_mld(struct sk_buff *skb);
+void addrconf_dad_failure(struct sk_buff *skb, 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);
+
+/*
+ * 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);
+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);
+int ipv6_anycast_init(void);
+void ipv6_anycast_cleanup(void);
+
+/* 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);
+
+int register_inet6addr_validator_notifier(struct notifier_block *nb);
+int unregister_inet6addr_validator_notifier(struct notifier_block *nb);
+int inet6addr_validator_notifier_call_chain(unsigned long val, void *v);
+
+void inet6_netconf_notify_devconf(struct net *net, int event, 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);
+}
+
+static inline struct inet6_dev *in6_dev_rcu(const struct net_device *dev)
+{
+	return rcu_dereference(dev->ip6_ptr);
+}
+
+static inline struct inet6_dev *__in6_dev_get_rtnl_net(const struct net_device *dev)
+{
+	return rtnl_net_dereference(dev_net(dev), dev->ip6_ptr);
+}
+
+/**
+ * __in6_dev_stats_get - get inet6_dev pointer for stats
+ * @dev: network device
+ * @skb: skb for original incoming interface if needed
+ *
+ * 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_stats_get(const struct net_device *dev,
+						    const struct sk_buff *skb)
+{
+	if (netif_is_l3_master(dev)) {
+		dev = dev_get_by_index_rcu(dev_net(dev), inet6_iif(skb));
+		if (!dev)
+			return NULL;
+	}
+	return __in6_dev_get(dev);
+}
+
+/**
+ * __in6_dev_get_safely - get inet6_dev pointer from netdevice
+ * @dev: network device
+ *
+ * This is a safer version of __in6_dev_get
+ */
+static inline struct inet6_dev *__in6_dev_get_safely(const struct net_device *dev)
+{
+	if (likely(dev))
+		return rcu_dereference_rtnl(dev->ip6_ptr);
+	else
+		return NULL;
+}
+
+/**
+ * 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 && !refcount_inc_not_zero(&idev->refcnt))
+		idev = NULL;
+	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 (refcount_dec_and_test(&idev->refcnt))
+		in6_dev_finish_destroy(idev);
+}
+
+static inline void in6_dev_put_clear(struct inet6_dev **pidev)
+{
+	struct inet6_dev *idev = *pidev;
+
+	if (idev) {
+		in6_dev_put(idev);
+		*pidev = NULL;
+	}
+}
+
+static inline void __in6_dev_put(struct inet6_dev *idev)
+{
+	refcount_dec(&idev->refcnt);
+}
+
+static inline void in6_dev_hold(struct inet6_dev *idev)
+{
+	refcount_inc(&idev->refcnt);
+}
+
+static inline bool in6_dev_hold_safe(struct inet6_dev *idev)
+{
+	return refcount_inc_not_zero(&idev->refcnt);
+}
+
+/* called with rcu_read_lock held */
+static inline bool ip6_ignore_linkdown(const struct net_device *dev)
+{
+	const struct inet6_dev *idev = __in6_dev_get(dev);
+
+	if (unlikely(!idev))
+		return true;
+
+	return !!READ_ONCE(idev->cnf.ignore_routes_with_linkdown);
+}
+
+void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
+
+static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
+{
+	if (refcount_dec_and_test(&ifp->refcnt))
+		inet6_ifa_finish_destroy(ifp);
+}
+
+static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
+{
+	refcount_dec(&ifp->refcnt);
+}
+
+static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
+{
+	refcount_inc(&ifp->refcnt);
+}
+
+static inline bool in6_ifa_hold_safe(struct inet6_ifaddr *ifp)
+{
+	return refcount_inc_not_zero(&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 = (__force __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 = (__force __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 = (__force __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
+}
+
+static inline bool ipv6_addr_is_all_snoopers(const struct in6_addr *addr)
+{
+#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
+	__be64 *p = (__force __be64 *)addr;
+
+	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
+		(p[1] ^ cpu_to_be64(0x6a))) == 0UL;
+#else
+	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
+		addr->s6_addr32[1] | addr->s6_addr32[2] |
+		(addr->s6_addr32[3] ^ htonl(0x0000006a))) == 0;
+#endif
+}
+
+#ifdef CONFIG_PROC_FS
+int if6_proc_init(void);
+void if6_proc_exit(void);
+#endif
+
+int inet6_fill_ifmcaddr(struct sk_buff *skb,
+			const struct ifmcaddr6 *ifmca,
+			struct inet6_fill_args *args);
+
+int inet6_fill_ifacaddr(struct sk_buff *skb,
+			const struct ifacaddr6 *ifaca,
+			struct inet6_fill_args *args);
+#endif