Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from David Miller:

 1) Support 6Ghz band in ath11k driver, from Rajkumar Manoharan.

 2) Support UDP segmentation in code TSO code, from Eric Dumazet.

 3) Allow flashing different flash images in cxgb4 driver, from Vishal
    Kulkarni.

 4) Add drop frames counter and flow status to tc flower offloading,
    from Po Liu.

 5) Support n-tuple filters in cxgb4, from Vishal Kulkarni.

 6) Various new indirect call avoidance, from Eric Dumazet and Brian
    Vazquez.

 7) Fix BPF verifier failures on 32-bit pointer arithmetic, from
    Yonghong Song.

 8) Support querying and setting hardware address of a port function via
    devlink, use this in mlx5, from Parav Pandit.

 9) Support hw ipsec offload on bonding slaves, from Jarod Wilson.

10) Switch qca8k driver over to phylink, from Jonathan McDowell.

11) In bpftool, show list of processes holding BPF FD references to
    maps, programs, links, and btf objects. From Andrii Nakryiko.

12) Several conversions over to generic power management, from Vaibhav
    Gupta.

13) Add support for SO_KEEPALIVE et al. to bpf_setsockopt(), from Dmitry
    Yakunin.

14) Various https url conversions, from Alexander A. Klimov.

15) Timestamping and PHC support for mscc PHY driver, from Antoine
    Tenart.

16) Support bpf iterating over tcp and udp sockets, from Yonghong Song.

17) Support 5GBASE-T i40e NICs, from Aleksandr Loktionov.

18) Add kTLS RX HW offload support to mlx5e, from Tariq Toukan.

19) Fix the ->ndo_start_xmit() return type to be netdev_tx_t in several
    drivers. From Luc Van Oostenryck.

20) XDP support for xen-netfront, from Denis Kirjanov.

21) Support receive buffer autotuning in MPTCP, from Florian Westphal.

22) Support EF100 chip in sfc driver, from Edward Cree.

23) Add XDP support to mvpp2 driver, from Matteo Croce.

24) Support MPTCP in sock_diag, from Paolo Abeni.

25) Commonize UDP tunnel offloading code by creating udp_tunnel_nic
    infrastructure, from Jakub Kicinski.

26) Several pci_ --> dma_ API conversions, from Christophe JAILLET.

27) Add FLOW_ACTION_POLICE support to mlxsw, from Ido Schimmel.

28) Add SK_LOOKUP bpf program type, from Jakub Sitnicki.

29) Refactor a lot of networking socket option handling code in order to
    avoid set_fs() calls, from Christoph Hellwig.

30) Add rfc4884 support to icmp code, from Willem de Bruijn.

31) Support TBF offload in dpaa2-eth driver, from Ioana Ciornei.

32) Support XDP_REDIRECT in qede driver, from Alexander Lobakin.

33) Support PCI relaxed ordering in mlx5 driver, from Aya Levin.

34) Support TCP syncookies in MPTCP, from Flowian Westphal.

35) Fix several tricky cases of PMTU handling wrt. briding, from Stefano
    Brivio.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2056 commits)
  net: thunderx: initialize VF's mailbox mutex before first usage
  usb: hso: remove bogus check for EINPROGRESS
  usb: hso: no complaint about kmalloc failure
  hso: fix bailout in error case of probe
  ip_tunnel_core: Fix build for archs without _HAVE_ARCH_IPV6_CSUM
  selftests/net: relax cpu affinity requirement in msg_zerocopy test
  mptcp: be careful on subflow creation
  selftests: rtnetlink: make kci_test_encap() return sub-test result
  selftests: rtnetlink: correct the final return value for the test
  net: dsa: sja1105: use detected device id instead of DT one on mismatch
  tipc: set ub->ifindex for local ipv6 address
  ipv6: add ipv6_dev_find()
  net: openvswitch: silence suspicious RCU usage warning
  Revert "vxlan: fix tos value before xmit"
  ptp: only allow phase values lower than 1 period
  farsync: switch from 'pci_' to 'dma_' API
  wan: wanxl: switch from 'pci_' to 'dma_' API
  hv_netvsc: do not use VF device if link is down
  dpaa2-eth: Fix passing zero to 'PTR_ERR' warning
  net: macb: Properly handle phylink on at91sam9x
  ...

1 files changed, 333 insertions, 391 deletions

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 76f9e41859a2..43a894bf9a1b 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -136,13 +136,42 @@ static bool setsockopt_needs_rtnl(int optname)
 	return false;
 }
 
+static int copy_group_source_from_sockptr(struct group_source_req *greqs,
+		sockptr_t optval, int optlen)
+{
+	if (in_compat_syscall()) {
+		struct compat_group_source_req gr32;
+
+		if (optlen < sizeof(gr32))
+			return -EINVAL;
+		if (copy_from_sockptr(&gr32, optval, sizeof(gr32)))
+			return -EFAULT;
+		greqs->gsr_interface = gr32.gsr_interface;
+		greqs->gsr_group = gr32.gsr_group;
+		greqs->gsr_source = gr32.gsr_source;
+	} else {
+		if (optlen < sizeof(*greqs))
+			return -EINVAL;
+		if (copy_from_sockptr(greqs, optval, sizeof(*greqs)))
+			return -EFAULT;
+	}
+
+	return 0;
+}
+
 static int do_ipv6_mcast_group_source(struct sock *sk, int optname,
-				      struct group_source_req *greqs)
+		sockptr_t optval, int optlen)
 {
+	struct group_source_req greqs;
 	int omode, add;
+	int ret;
+
+	ret = copy_group_source_from_sockptr(&greqs, optval, optlen);
+	if (ret)
+		return ret;
 
-	if (greqs->gsr_group.ss_family != AF_INET6 ||
-	    greqs->gsr_source.ss_family != AF_INET6)
+	if (greqs.gsr_group.ss_family != AF_INET6 ||
+	    greqs.gsr_source.ss_family != AF_INET6)
 		return -EADDRNOTAVAIL;
 
 	if (optname == MCAST_BLOCK_SOURCE) {
@@ -155,8 +184,8 @@ static int do_ipv6_mcast_group_source(struct sock *sk, int optname,
 		struct sockaddr_in6 *psin6;
 		int retv;
 
-		psin6 = (struct sockaddr_in6 *)&greqs->gsr_group;
-		retv = ipv6_sock_mc_join_ssm(sk, greqs->gsr_interface,
+		psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
+		retv = ipv6_sock_mc_join_ssm(sk, greqs.gsr_interface,
 					     &psin6->sin6_addr,
 					     MCAST_INCLUDE);
 		/* prior join w/ different source is ok */
@@ -168,11 +197,200 @@ static int do_ipv6_mcast_group_source(struct sock *sk, int optname,
 		omode = MCAST_INCLUDE;
 		add = 0;
 	}
-	return ip6_mc_source(add, omode, sk, greqs);
+	return ip6_mc_source(add, omode, sk, &greqs);
+}
+
+static int ipv6_set_mcast_msfilter(struct sock *sk, sockptr_t optval,
+		int optlen)
+{
+	struct group_filter *gsf;
+	int ret;
+
+	if (optlen < GROUP_FILTER_SIZE(0))
+		return -EINVAL;
+	if (optlen > sysctl_optmem_max)
+		return -ENOBUFS;
+
+	gsf = memdup_sockptr(optval, optlen);
+	if (IS_ERR(gsf))
+		return PTR_ERR(gsf);
+
+	/* numsrc >= (4G-140)/128 overflow in 32 bits */
+	ret = -ENOBUFS;
+	if (gsf->gf_numsrc >= 0x1ffffffU ||
+	    gsf->gf_numsrc > sysctl_mld_max_msf)
+		goto out_free_gsf;
+
+	ret = -EINVAL;
+	if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen)
+		goto out_free_gsf;
+
+	ret = ip6_mc_msfilter(sk, gsf, gsf->gf_slist);
+out_free_gsf:
+	kfree(gsf);
+	return ret;
+}
+
+static int compat_ipv6_set_mcast_msfilter(struct sock *sk, sockptr_t optval,
+		int optlen)
+{
+	const int size0 = offsetof(struct compat_group_filter, gf_slist);
+	struct compat_group_filter *gf32;
+	void *p;
+	int ret;
+	int n;
+
+	if (optlen < size0)
+		return -EINVAL;
+	if (optlen > sysctl_optmem_max - 4)
+		return -ENOBUFS;
+
+	p = kmalloc(optlen + 4, GFP_KERNEL);
+	if (!p)
+		return -ENOMEM;
+
+	gf32 = p + 4; /* we want ->gf_group and ->gf_slist aligned */
+	ret = -EFAULT;
+	if (copy_from_sockptr(gf32, optval, optlen))
+		goto out_free_p;
+
+	/* numsrc >= (4G-140)/128 overflow in 32 bits */
+	ret = -ENOBUFS;
+	n = gf32->gf_numsrc;
+	if (n >= 0x1ffffffU || n > sysctl_mld_max_msf)
+		goto out_free_p;
+
+	ret = -EINVAL;
+	if (offsetof(struct compat_group_filter, gf_slist[n]) > optlen)
+		goto out_free_p;
+
+	ret = ip6_mc_msfilter(sk, &(struct group_filter){
+			.gf_interface = gf32->gf_interface,
+			.gf_group = gf32->gf_group,
+			.gf_fmode = gf32->gf_fmode,
+			.gf_numsrc = gf32->gf_numsrc}, gf32->gf_slist);
+
+out_free_p:
+	kfree(p);
+	return ret;
+}
+
+static int ipv6_mcast_join_leave(struct sock *sk, int optname,
+		sockptr_t optval, int optlen)
+{
+	struct sockaddr_in6 *psin6;
+	struct group_req greq;
+
+	if (optlen < sizeof(greq))
+		return -EINVAL;
+	if (copy_from_sockptr(&greq, optval, sizeof(greq)))
+		return -EFAULT;
+
+	if (greq.gr_group.ss_family != AF_INET6)
+		return -EADDRNOTAVAIL;
+	psin6 = (struct sockaddr_in6 *)&greq.gr_group;
+	if (optname == MCAST_JOIN_GROUP)
+		return ipv6_sock_mc_join(sk, greq.gr_interface,
+					 &psin6->sin6_addr);
+	return ipv6_sock_mc_drop(sk, greq.gr_interface, &psin6->sin6_addr);
+}
+
+static int compat_ipv6_mcast_join_leave(struct sock *sk, int optname,
+		sockptr_t optval, int optlen)
+{
+	struct compat_group_req gr32;
+	struct sockaddr_in6 *psin6;
+
+	if (optlen < sizeof(gr32))
+		return -EINVAL;
+	if (copy_from_sockptr(&gr32, optval, sizeof(gr32)))
+		return -EFAULT;
+
+	if (gr32.gr_group.ss_family != AF_INET6)
+		return -EADDRNOTAVAIL;
+	psin6 = (struct sockaddr_in6 *)&gr32.gr_group;
+	if (optname == MCAST_JOIN_GROUP)
+		return ipv6_sock_mc_join(sk, gr32.gr_interface,
+					&psin6->sin6_addr);
+	return ipv6_sock_mc_drop(sk, gr32.gr_interface, &psin6->sin6_addr);
+}
+
+static int ipv6_set_opt_hdr(struct sock *sk, int optname, sockptr_t optval,
+		int optlen)
+{
+	struct ipv6_pinfo *np = inet6_sk(sk);
+	struct ipv6_opt_hdr *new = NULL;
+	struct net *net = sock_net(sk);
+	struct ipv6_txoptions *opt;
+	int err;
+
+	/* hop-by-hop / destination options are privileged option */
+	if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW))
+		return -EPERM;
+
+	/* remove any sticky options header with a zero option
+	 * length, per RFC3542.
+	 */
+	if (optlen > 0) {
+		if (sockptr_is_null(optval))
+			return -EINVAL;
+		if (optlen < sizeof(struct ipv6_opt_hdr) ||
+		    optlen & 0x7 ||
+		    optlen > 8 * 255)
+			return -EINVAL;
+
+		new = memdup_sockptr(optval, optlen);
+		if (IS_ERR(new))
+			return PTR_ERR(new);
+		if (unlikely(ipv6_optlen(new) > optlen)) {
+			kfree(new);
+			return -EINVAL;
+		}
+	}
+
+	opt = rcu_dereference_protected(np->opt, lockdep_sock_is_held(sk));
+	opt = ipv6_renew_options(sk, opt, optname, new);
+	kfree(new);
+	if (IS_ERR(opt))
+		return PTR_ERR(opt);
+
+	/* routing header option needs extra check */
+	err = -EINVAL;
+	if (optname == IPV6_RTHDR && opt && opt->srcrt) {
+		struct ipv6_rt_hdr *rthdr = opt->srcrt;
+		switch (rthdr->type) {
+#if IS_ENABLED(CONFIG_IPV6_MIP6)
+		case IPV6_SRCRT_TYPE_2:
+			if (rthdr->hdrlen != 2 || rthdr->segments_left != 1)
+				goto sticky_done;
+			break;
+#endif
+		case IPV6_SRCRT_TYPE_4:
+		{
+			struct ipv6_sr_hdr *srh =
+				(struct ipv6_sr_hdr *)opt->srcrt;
+
+			if (!seg6_validate_srh(srh, optlen, false))
+				goto sticky_done;
+			break;
+		}
+		default:
+			goto sticky_done;
+		}
+	}
+
+	err = 0;
+	opt = ipv6_update_options(sk, opt);
+sticky_done:
+	if (opt) {
+		atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
+		txopt_put(opt);
+	}
+	return err;
 }
 
 static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
-		    char __user *optval, unsigned int optlen)
+		   sockptr_t optval, unsigned int optlen)
 {
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct net *net = sock_net(sk);
@@ -180,11 +398,11 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 	int retv = -ENOPROTOOPT;
 	bool needs_rtnl = setsockopt_needs_rtnl(optname);
 
-	if (!optval)
+	if (sockptr_is_null(optval))
 		val = 0;
 	else {
 		if (optlen >= sizeof(int)) {
-			if (get_user(val, (int __user *) optval))
+			if (copy_from_sockptr(&val, optval, sizeof(val)))
 				return -EFAULT;
 		} else
 			val = 0;
@@ -436,82 +654,8 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 	case IPV6_RTHDRDSTOPTS:
 	case IPV6_RTHDR:
 	case IPV6_DSTOPTS:
-	{
-		struct ipv6_txoptions *opt;
-		struct ipv6_opt_hdr *new = NULL;
-
-		/* hop-by-hop / destination options are privileged option */
-		retv = -EPERM;
-		if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW))
-			break;
-
-		/* remove any sticky options header with a zero option
-		 * length, per RFC3542.
-		 */
-		if (optlen == 0)
-			optval = NULL;
-		else if (!optval)
-			goto e_inval;
-		else if (optlen < sizeof(struct ipv6_opt_hdr) ||
-			 optlen & 0x7 || optlen > 8 * 255)
-			goto e_inval;
-		else {
-			new = memdup_user(optval, optlen);
-			if (IS_ERR(new)) {
-				retv = PTR_ERR(new);
-				break;
-			}
-			if (unlikely(ipv6_optlen(new) > optlen)) {
-				kfree(new);
-				goto e_inval;
-			}
-		}
-
-		opt = rcu_dereference_protected(np->opt,
-						lockdep_sock_is_held(sk));
-		opt = ipv6_renew_options(sk, opt, optname, new);
-		kfree(new);
-		if (IS_ERR(opt)) {
-			retv = PTR_ERR(opt);
-			break;
-		}
-
-		/* routing header option needs extra check */
-		retv = -EINVAL;
-		if (optname == IPV6_RTHDR && opt && opt->srcrt) {
-			struct ipv6_rt_hdr *rthdr = opt->srcrt;
-			switch (rthdr->type) {
-#if IS_ENABLED(CONFIG_IPV6_MIP6)
-			case IPV6_SRCRT_TYPE_2:
-				if (rthdr->hdrlen != 2 ||
-				    rthdr->segments_left != 1)
-					goto sticky_done;
-
-				break;
-#endif
-			case IPV6_SRCRT_TYPE_4:
-			{
-				struct ipv6_sr_hdr *srh = (struct ipv6_sr_hdr *)
-							  opt->srcrt;
-
-				if (!seg6_validate_srh(srh, optlen, false))
-					goto sticky_done;
-				break;
-			}
-			default:
-				goto sticky_done;
-			}
-		}
-
-		retv = 0;
-		opt = ipv6_update_options(sk, opt);
-sticky_done:
-		if (opt) {
-			atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
-			txopt_put(opt);
-		}
+		retv = ipv6_set_opt_hdr(sk, optname, optval, optlen);
 		break;
-	}
 
 	case IPV6_PKTINFO:
 	{
@@ -519,12 +663,13 @@ sticky_done:
 
 		if (optlen == 0)
 			goto e_inval;
-		else if (optlen < sizeof(struct in6_pktinfo) || !optval)
+		else if (optlen < sizeof(struct in6_pktinfo) ||
+			 sockptr_is_null(optval))
 			goto e_inval;
 
-		if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) {
-				retv = -EFAULT;
-				break;
+		if (copy_from_sockptr(&pkt, optval, sizeof(pkt))) {
+			retv = -EFAULT;
+			break;
 		}
 		if (!sk_dev_equal_l3scope(sk, pkt.ipi6_ifindex))
 			goto e_inval;
@@ -565,7 +710,7 @@ sticky_done:
 		refcount_set(&opt->refcnt, 1);
 		opt->tot_len = sizeof(*opt) + optlen;
 		retv = -EFAULT;
-		if (copy_from_user(opt+1, optval, optlen))
+		if (copy_from_sockptr(opt + 1, optval, optlen))
 			goto done;
 
 		msg.msg_controllen = optlen;
@@ -687,7 +832,7 @@ done:
 			break;
 
 		retv = -EFAULT;
-		if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
+		if (copy_from_sockptr(&mreq, optval, sizeof(struct ipv6_mreq)))
 			break;
 
 		if (optname == IPV6_ADD_MEMBERSHIP)
@@ -705,7 +850,7 @@ done:
 			goto e_inval;
 
 		retv = -EFAULT;
-		if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
+		if (copy_from_sockptr(&mreq, optval, sizeof(struct ipv6_mreq)))
 			break;
 
 		if (optname == IPV6_JOIN_ANYCAST)
@@ -723,77 +868,26 @@ done:
 
 	case MCAST_JOIN_GROUP:
 	case MCAST_LEAVE_GROUP:
-	{
-		struct group_req greq;
-		struct sockaddr_in6 *psin6;
-
-		if (optlen < sizeof(struct group_req))
-			goto e_inval;
-
-		retv = -EFAULT;
-		if (copy_from_user(&greq, optval, sizeof(struct group_req)))
-			break;
-		if (greq.gr_group.ss_family != AF_INET6) {
-			retv = -EADDRNOTAVAIL;
-			break;
-		}
-		psin6 = (struct sockaddr_in6 *)&greq.gr_group;
-		if (optname == MCAST_JOIN_GROUP)
-			retv = ipv6_sock_mc_join(sk, greq.gr_interface,
-						 &psin6->sin6_addr);
+		if (in_compat_syscall())
+			retv = compat_ipv6_mcast_join_leave(sk, optname, optval,
+							    optlen);
 		else
-			retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
-						 &psin6->sin6_addr);
+			retv = ipv6_mcast_join_leave(sk, optname, optval,
+						     optlen);
 		break;
-	}
 	case MCAST_JOIN_SOURCE_GROUP:
 	case MCAST_LEAVE_SOURCE_GROUP:
 	case MCAST_BLOCK_SOURCE:
 	case MCAST_UNBLOCK_SOURCE:
-	{
-		struct group_source_req greqs;
-
-		if (optlen < sizeof(struct group_source_req))
-			goto e_inval;
-		if (copy_from_user(&greqs, optval, sizeof(greqs))) {
-			retv = -EFAULT;
-			break;
-		}
-		retv = do_ipv6_mcast_group_source(sk, optname, &greqs);
+		retv = do_ipv6_mcast_group_source(sk, optname, optval, optlen);
 		break;
-	}
 	case MCAST_MSFILTER:
-	{
-		struct group_filter *gsf;
-
-		if (optlen < GROUP_FILTER_SIZE(0))
-			goto e_inval;
-		if (optlen > sysctl_optmem_max) {
-			retv = -ENOBUFS;
-			break;
-		}
-		gsf = memdup_user(optval, optlen);
-		if (IS_ERR(gsf)) {
-			retv = PTR_ERR(gsf);
-			break;
-		}
-		/* numsrc >= (4G-140)/128 overflow in 32 bits */
-		if (gsf->gf_numsrc >= 0x1ffffffU ||
-		    gsf->gf_numsrc > sysctl_mld_max_msf) {
-			kfree(gsf);
-			retv = -ENOBUFS;
-			break;
-		}
-		if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
-			kfree(gsf);
-			retv = -EINVAL;
-			break;
-		}
-		retv = ip6_mc_msfilter(sk, gsf, gsf->gf_slist);
-		kfree(gsf);
-
+		if (in_compat_syscall())
+			retv = compat_ipv6_set_mcast_msfilter(sk, optval,
+							      optlen);
+		else
+			retv = ipv6_set_mcast_msfilter(sk, optval, optlen);
 		break;
-	}
 	case IPV6_ROUTER_ALERT:
 		if (optlen < sizeof(int))
 			goto e_inval;
@@ -872,6 +966,14 @@ done:
 		np->rxopt.bits.recvfragsize = valbool;
 		retv = 0;
 		break;
+	case IPV6_RECVERR_RFC4884:
+		if (optlen < sizeof(int))
+			goto e_inval;
+		if (val < 0 || val > 1)
+			goto e_inval;
+		np->recverr_rfc4884 = valbool;
+		retv = 0;
+		break;
 	}
 
 	release_sock(sk);
@@ -887,8 +989,8 @@ e_inval:
 	return -EINVAL;
 }
 
-int ipv6_setsockopt(struct sock *sk, int level, int optname,
-		    char __user *optval, unsigned int optlen)
+int ipv6_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
+		    unsigned int optlen)
 {
 	int err;
 
@@ -909,140 +1011,6 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname,
 }
 EXPORT_SYMBOL(ipv6_setsockopt);
 
-#ifdef CONFIG_COMPAT
-int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
-			   char __user *optval, unsigned int optlen)
-{
-	int err;
-
-	if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
-		if (udp_prot.compat_setsockopt != NULL)
-			return udp_prot.compat_setsockopt(sk, level, optname,
-							  optval, optlen);
-		return udp_prot.setsockopt(sk, level, optname, optval, optlen);
-	}
-
-	if (level != SOL_IPV6)
-		return -ENOPROTOOPT;
-
-	switch (optname) {
-	case MCAST_JOIN_GROUP:
-	case MCAST_LEAVE_GROUP:
-	{
-		struct compat_group_req __user *gr32 = (void __user *)optval;
-		struct group_req greq;
-		struct sockaddr_in6 *psin6 = (struct sockaddr_in6 *)&greq.gr_group;
-
-		if (optlen < sizeof(struct compat_group_req))
-			return -EINVAL;
-
-		if (get_user(greq.gr_interface, &gr32->gr_interface) ||
-		    copy_from_user(&greq.gr_group, &gr32->gr_group,
-				sizeof(greq.gr_group)))
-			return -EFAULT;
-
-		if (greq.gr_group.ss_family != AF_INET6)
-			return -EADDRNOTAVAIL;
-
-		rtnl_lock();
-		lock_sock(sk);
-		if (optname == MCAST_JOIN_GROUP)
-			err = ipv6_sock_mc_join(sk, greq.gr_interface,
-						 &psin6->sin6_addr);
-		else
-			err = ipv6_sock_mc_drop(sk, greq.gr_interface,
-						 &psin6->sin6_addr);
-		release_sock(sk);
-		rtnl_unlock();
-		return err;
-	}
-	case MCAST_JOIN_SOURCE_GROUP:
-	case MCAST_LEAVE_SOURCE_GROUP:
-	case MCAST_BLOCK_SOURCE:
-	case MCAST_UNBLOCK_SOURCE:
-	{
-		struct compat_group_source_req __user *gsr32 = (void __user *)optval;
-		struct group_source_req greqs;
-
-		if (optlen < sizeof(struct compat_group_source_req))
-			return -EINVAL;
-
-		if (get_user(greqs.gsr_interface, &gsr32->gsr_interface) ||
-		    copy_from_user(&greqs.gsr_group, &gsr32->gsr_group,
-				sizeof(greqs.gsr_group)) ||
-		    copy_from_user(&greqs.gsr_source, &gsr32->gsr_source,
-				sizeof(greqs.gsr_source)))
-			return -EFAULT;
-
-		rtnl_lock();
-		lock_sock(sk);
-		err = do_ipv6_mcast_group_source(sk, optname, &greqs);
-		release_sock(sk);
-		rtnl_unlock();
-		return err;
-	}
-	case MCAST_MSFILTER:
-	{
-		const int size0 = offsetof(struct compat_group_filter, gf_slist);
-		struct compat_group_filter *gf32;
-		void *p;
-		int n;
-
-		if (optlen < size0)
-			return -EINVAL;
-		if (optlen > sysctl_optmem_max - 4)
-			return -ENOBUFS;
-
-		p = kmalloc(optlen + 4, GFP_KERNEL);
-		if (!p)
-			return -ENOMEM;
-
-		gf32 = p + 4; /* we want ->gf_group and ->gf_slist aligned */
-		if (copy_from_user(gf32, optval, optlen)) {
-			err = -EFAULT;
-			goto mc_msf_out;
-		}
-
-		n = gf32->gf_numsrc;
-		/* numsrc >= (4G-140)/128 overflow in 32 bits */
-		if (n >= 0x1ffffffU ||
-		    n > sysctl_mld_max_msf) {
-			err = -ENOBUFS;
-			goto mc_msf_out;
-		}
-		if (offsetof(struct compat_group_filter, gf_slist[n]) > optlen) {
-			err = -EINVAL;
-			goto mc_msf_out;
-		}
-
-		rtnl_lock();
-		lock_sock(sk);
-		err = ip6_mc_msfilter(sk, &(struct group_filter){
-				.gf_interface = gf32->gf_interface,
-				.gf_group = gf32->gf_group,
-				.gf_fmode = gf32->gf_fmode,
-				.gf_numsrc = gf32->gf_numsrc}, gf32->gf_slist);
-		release_sock(sk);
-		rtnl_unlock();
-mc_msf_out:
-		kfree(p);
-		return err;
-	}
-	}
-
-	err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
-#ifdef CONFIG_NETFILTER
-	/* we need to exclude all possible ENOPROTOOPTs except default case */
-	if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
-	    optname != IPV6_XFRM_POLICY)
-		err = compat_nf_setsockopt(sk, PF_INET6, optname, optval,
-					   optlen);
-#endif
-	return err;
-}
-EXPORT_SYMBOL(compat_ipv6_setsockopt);
-#endif
-
 static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
 				  int optname, char __user *optval, int len)
 {
@@ -1077,6 +1045,75 @@ static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
 	return len;
 }
 
+static int ipv6_get_msfilter(struct sock *sk, void __user *optval,
+		int __user *optlen, int len)
+{
+	const int size0 = offsetof(struct group_filter, gf_slist);
+	struct group_filter __user *p = optval;
+	struct group_filter gsf;
+	int num;
+	int err;
+
+	if (len < size0)
+		return -EINVAL;
+	if (copy_from_user(&gsf, p, size0))
+		return -EFAULT;
+	if (gsf.gf_group.ss_family != AF_INET6)
+		return -EADDRNOTAVAIL;
+	num = gsf.gf_numsrc;
+	lock_sock(sk);
+	err = ip6_mc_msfget(sk, &gsf, p->gf_slist);
+	if (!err) {
+		if (num > gsf.gf_numsrc)
+			num = gsf.gf_numsrc;
+		if (put_user(GROUP_FILTER_SIZE(num), optlen) ||
+		    copy_to_user(p, &gsf, size0))
+			err = -EFAULT;
+	}
+	release_sock(sk);
+	return err;
+}
+
+static int compat_ipv6_get_msfilter(struct sock *sk, void __user *optval,
+		int __user *optlen)
+{
+	const int size0 = offsetof(struct compat_group_filter, gf_slist);
+	struct compat_group_filter __user *p = optval;
+	struct compat_group_filter gf32;
+	struct group_filter gf;
+	int len, err;
+	int num;
+
+	if (get_user(len, optlen))
+		return -EFAULT;
+	if (len < size0)
+		return -EINVAL;
+
+	if (copy_from_user(&gf32, p, size0))
+		return -EFAULT;
+	gf.gf_interface = gf32.gf_interface;
+	gf.gf_fmode = gf32.gf_fmode;
+	num = gf.gf_numsrc = gf32.gf_numsrc;
+	gf.gf_group = gf32.gf_group;
+
+	if (gf.gf_group.ss_family != AF_INET6)
+		return -EADDRNOTAVAIL;
+
+	lock_sock(sk);
+	err = ip6_mc_msfget(sk, &gf, p->gf_slist);
+	release_sock(sk);
+	if (err)
+		return err;
+	if (num > gf.gf_numsrc)
+		num = gf.gf_numsrc;
+	len = GROUP_FILTER_SIZE(num) - (sizeof(gf)-sizeof(gf32));
+	if (put_user(len, optlen) ||
+	    put_user(gf.gf_fmode, &p->gf_fmode) ||
+	    put_user(gf.gf_numsrc, &p->gf_numsrc))
+		return -EFAULT;
+	return 0;
+}
+
 static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
 		    char __user *optval, int __user *optlen, unsigned int flags)
 {
@@ -1100,33 +1137,9 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
 		val = sk->sk_family;
 		break;
 	case MCAST_MSFILTER:
-	{
-		struct group_filter __user *p = (void __user *)optval;
-		struct group_filter gsf;
-		const int size0 = offsetof(struct group_filter, gf_slist);
-		int num;
-		int err;
-
-		if (len < size0)
-			return -EINVAL;
-		if (copy_from_user(&gsf, p, size0))
-			return -EFAULT;
-		if (gsf.gf_group.ss_family != AF_INET6)
-			return -EADDRNOTAVAIL;
-		num = gsf.gf_numsrc;
-		lock_sock(sk);
-		err = ip6_mc_msfget(sk, &gsf, p->gf_slist);
-		if (!err) {
-			if (num > gsf.gf_numsrc)
-				num = gsf.gf_numsrc;
-			if (put_user(GROUP_FILTER_SIZE(num), optlen) ||
-			    copy_to_user(p, &gsf, size0))
-				err = -EFAULT;
-		}
-		release_sock(sk);
-		return err;
-	}
-
+		if (in_compat_syscall())
+			return compat_ipv6_get_msfilter(sk, optval, optlen);
+		return ipv6_get_msfilter(sk, optval, optlen, len);
 	case IPV6_2292PKTOPTIONS:
 	{
 		struct msghdr msg;
@@ -1435,6 +1448,10 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
 		val = np->rtalert_isolate;
 		break;
 
+	case IPV6_RECVERR_RFC4884:
+		val = np->recverr_rfc4884;
+		break;
+
 	default:
 		return -ENOPROTOOPT;
 	}
@@ -1474,78 +1491,3 @@ int ipv6_getsockopt(struct sock *sk, int level, int optname,
 	return err;
 }
 EXPORT_SYMBOL(ipv6_getsockopt);
-
-#ifdef CONFIG_COMPAT
-int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
-			   char __user *optval, int __user *optlen)
-{
-	int err;
-
-	if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
-		if (udp_prot.compat_getsockopt != NULL)
-			return udp_prot.compat_getsockopt(sk, level, optname,
-							  optval, optlen);
-		return udp_prot.getsockopt(sk, level, optname, optval, optlen);
-	}
-
-	if (level != SOL_IPV6)
-		return -ENOPROTOOPT;
-
-	if (optname == MCAST_MSFILTER) {
-		const int size0 = offsetof(struct compat_group_filter, gf_slist);
-		struct compat_group_filter __user *p = (void __user *)optval;
-		struct compat_group_filter gf32;
-		struct group_filter gf;
-		int ulen, err;
-		int num;
-
-		if (get_user(ulen, optlen))
-			return -EFAULT;
-
-		if (ulen < size0)
-			return -EINVAL;
-
-		if (copy_from_user(&gf32, p, size0))
-			return -EFAULT;
-
-		gf.gf_interface = gf32.gf_interface;
-		gf.gf_fmode = gf32.gf_fmode;
-		num = gf.gf_numsrc = gf32.gf_numsrc;
-		gf.gf_group = gf32.gf_group;
-
-		if (gf.gf_group.ss_family != AF_INET6)
-			return -EADDRNOTAVAIL;
-		lock_sock(sk);
-		err = ip6_mc_msfget(sk, &gf, p->gf_slist);
-		release_sock(sk);
-		if (err)
-			return err;
-		if (num > gf.gf_numsrc)
-			num = gf.gf_numsrc;
-		ulen = GROUP_FILTER_SIZE(num) - (sizeof(gf)-sizeof(gf32));
-		if (put_user(ulen, optlen) ||
-		    put_user(gf.gf_fmode, &p->gf_fmode) ||
-		    put_user(gf.gf_numsrc, &p->gf_numsrc))
-			return -EFAULT;
-		return 0;
-	}
-
-	err = do_ipv6_getsockopt(sk, level, optname, optval, optlen,
-				 MSG_CMSG_COMPAT);
-#ifdef CONFIG_NETFILTER
-	/* we need to exclude all possible ENOPROTOOPTs except default case */
-	if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
-		int len;
-
-		if (get_user(len, optlen))
-			return -EFAULT;
-
-		err = compat_nf_getsockopt(sk, PF_INET6, optname, optval, &len);
-		if (err >= 0)
-			err = put_user(len, optlen);
-	}
-#endif
-	return err;
-}
-EXPORT_SYMBOL(compat_ipv6_getsockopt);
-#endif