Release 4.14 net/ipv6/ipv6_sockglue.c

/*
 *      IPv6 BSD socket options interface
 *      Linux INET6 implementation
 *
 *      Authors:
 *      Pedro Roque             <roque@di.fc.ul.pt>
 *
 *      Based on linux/net/ipv4/ip_sockglue.c
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 *
 *      FIXME: Make the setsockopt code POSIX compliant: That is
 *
 *      o       Truncate getsockopt returns
 *      o       Return an optlen of the truncated length if need be
 *
 *      Changes:
 *      David L Stevens <dlstevens@us.ibm.com>:
 *              - added multicast source filtering API for MLDv2
 */

#include <linux/module.h>
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/in6.h>
#include <linux/mroute6.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/init.h>
#include <linux/sysctl.h>
#include <linux/netfilter.h>
#include <linux/slab.h>

#include <net/sock.h>
#include <net/snmp.h>
#include <net/ipv6.h>
#include <net/ndisc.h>
#include <net/protocol.h>
#include <net/transp_v6.h>
#include <net/ip6_route.h>
#include <net/addrconf.h>
#include <net/inet_common.h>
#include <net/tcp.h>
#include <net/udp.h>
#include <net/udplite.h>
#include <net/xfrm.h>
#include <net/compat.h>
#include <net/seg6.h>

#include <linux/uaccess.h>


struct ip6_ra_chain *ip6_ra_chain;

DEFINE_RWLOCK(ip6_ra_lock);



int ip6_ra_control(struct sock *sk, int sel)
{
	struct ip6_ra_chain *ra, *new_ra, **rap;

	/* RA packet may be delivered ONLY to IPPROTO_RAW socket */
	if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW)
		return -ENOPROTOOPT;

	new_ra = (sel >= 0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;

	write_lock_bh(&ip6_ra_lock);
	for (rap = &ip6_ra_chain; (ra = *rap) != NULL; rap = &ra->next) {
		if (ra->sk == sk) {
			if (sel >= 0) {
				write_unlock_bh(&ip6_ra_lock);
				kfree(new_ra);
				return -EADDRINUSE;
			}

			*rap = ra->next;
			write_unlock_bh(&ip6_ra_lock);

			sock_put(sk);
			kfree(ra);
			return 0;
		}
	}
	if (!new_ra) {
		write_unlock_bh(&ip6_ra_lock);
		return -ENOBUFS;
	}
	new_ra->sk = sk;
	new_ra->sel = sel;
	new_ra->next = ra;
	*rap = new_ra;
	sock_hold(sk);
	write_unlock_bh(&ip6_ra_lock);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
205
96.70%
3
37.50%
David S. Miller
3
1.42%
1
12.50%
Ian Morris
1
0.47%
1
12.50%
Eric Dumazet
1
0.47%
1
12.50%
Arnaldo Carvalho de Melo
1
0.47%
1
12.50%
Hideaki Yoshifuji / 吉藤英明
1
0.47%
1
12.50%
Total
212
100.00%
8
100.00%



struct ipv6_txoptions *ipv6_update_options(struct sock *sk,
					   struct ipv6_txoptions *opt)
{
	if (inet_sk(sk)->is_icsk) {
		if (opt &&
		    !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
		    inet_sk(sk)->inet_daddr != LOOPBACK4_IPV6) {
			struct inet_connection_sock *icsk = inet_csk(sk);
			icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen;
			icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
		}
	}
	opt = xchg((__force struct ipv6_txoptions **)&inet6_sk(sk)->opt,
		   opt);
	sk_dst_reset(sk);

	return opt;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Hideaki Yoshifuji / 吉藤英明
115
93.50%
1
33.33%
Eric Dumazet
8
6.50%
2
66.67%
Total
123
100.00%
3
100.00%



static bool setsockopt_needs_rtnl(int optname)
{
	switch (optname) {
	case IPV6_ADDRFORM:
	case IPV6_ADD_MEMBERSHIP:
	case IPV6_DROP_MEMBERSHIP:
	case IPV6_JOIN_ANYCAST:
	case IPV6_LEAVE_ANYCAST:
	case MCAST_JOIN_GROUP:
	case MCAST_LEAVE_GROUP:
	case MCAST_JOIN_SOURCE_GROUP:
	case MCAST_LEAVE_SOURCE_GROUP:
	case MCAST_BLOCK_SOURCE:
	case MCAST_UNBLOCK_SOURCE:
	case MCAST_MSFILTER:
		return true;
	}
	return false;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcelo Ricardo Leitner
54
94.74%
3
75.00%
Américo Wang
3
5.26%
1
25.00%
Total
57
100.00%
4
100.00%



static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
		    char __user *optval, unsigned int optlen)
{
	struct ipv6_pinfo *np = inet6_sk(sk);
	struct net *net = sock_net(sk);
	int val, valbool;
	int retv = -ENOPROTOOPT;
	bool needs_rtnl = setsockopt_needs_rtnl(optname);

	if (!optval)
		val = 0;
	else {
		if (optlen >= sizeof(int)) {
			if (get_user(val, (int __user *) optval))
				return -EFAULT;
		} else
			val = 0;
	}

	valbool = (val != 0);

	if (ip6_mroute_opt(optname))
		return ip6_mroute_setsockopt(sk, optname, optval, optlen);

	if (needs_rtnl)
		rtnl_lock();
	lock_sock(sk);

	switch (optname) {

	case IPV6_ADDRFORM:
		if (optlen < sizeof(int))
			goto e_inval;
		if (val == PF_INET) {
			struct ipv6_txoptions *opt;
			struct sk_buff *pktopt;

			if (sk->sk_type == SOCK_RAW)
				break;

			if (sk->sk_protocol == IPPROTO_UDP ||
			    sk->sk_protocol == IPPROTO_UDPLITE) {
				struct udp_sock *up = udp_sk(sk);
				if (up->pending == AF_INET6) {
					retv = -EBUSY;
					break;
				}
			} else if (sk->sk_protocol != IPPROTO_TCP)
				break;

			if (sk->sk_state != TCP_ESTABLISHED) {
				retv = -ENOTCONN;
				break;
			}

			if (ipv6_only_sock(sk) ||
			    !ipv6_addr_v4mapped(&sk->sk_v6_daddr)) {
				retv = -EADDRNOTAVAIL;
				break;
			}

			fl6_free_socklist(sk);
			__ipv6_sock_mc_close(sk);

			/*
                         * Sock is moving from IPv6 to IPv4 (sk_prot), so
                         * remove it from the refcnt debug socks count in the
                         * original family...
                         */
			sk_refcnt_debug_dec(sk);

			if (sk->sk_protocol == IPPROTO_TCP) {
				struct inet_connection_sock *icsk = inet_csk(sk);
				local_bh_disable();
				sock_prot_inuse_add(net, sk->sk_prot, -1);
				sock_prot_inuse_add(net, &tcp_prot, 1);
				local_bh_enable();
				sk->sk_prot = &tcp_prot;
				icsk->icsk_af_ops = &ipv4_specific;
				sk->sk_socket->ops = &inet_stream_ops;
				sk->sk_family = PF_INET;
				tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
			} else {
				struct proto *prot = &udp_prot;

				if (sk->sk_protocol == IPPROTO_UDPLITE)
					prot = &udplite_prot;
				local_bh_disable();
				sock_prot_inuse_add(net, sk->sk_prot, -1);
				sock_prot_inuse_add(net, prot, 1);
				local_bh_enable();
				sk->sk_prot = prot;
				sk->sk_socket->ops = &inet_dgram_ops;
				sk->sk_family = PF_INET;
			}
			opt = xchg((__force struct ipv6_txoptions **)&np->opt,
				   NULL);
			if (opt) {
				atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
				txopt_put(opt);
			}
			pktopt = xchg(&np->pktoptions, NULL);
			kfree_skb(pktopt);

			/*
                         * ... and add it to the refcnt debug socks count
                         * in the new family. -acme
                         */
			sk_refcnt_debug_inc(sk);
			module_put(THIS_MODULE);
			retv = 0;
			break;
		}
		goto e_inval;

	case IPV6_V6ONLY:
		if (optlen < sizeof(int) ||
		    inet_sk(sk)->inet_num)
			goto e_inval;
		sk->sk_ipv6only = valbool;
		retv = 0;
		break;

	case IPV6_RECVPKTINFO:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.rxinfo = valbool;
		retv = 0;
		break;

	case IPV6_2292PKTINFO:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.rxoinfo = valbool;
		retv = 0;
		break;

	case IPV6_RECVHOPLIMIT:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.rxhlim = valbool;
		retv = 0;
		break;

	case IPV6_2292HOPLIMIT:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.rxohlim = valbool;
		retv = 0;
		break;

	case IPV6_RECVRTHDR:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.srcrt = valbool;
		retv = 0;
		break;

	case IPV6_2292RTHDR:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.osrcrt = valbool;
		retv = 0;
		break;

	case IPV6_RECVHOPOPTS:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.hopopts = valbool;
		retv = 0;
		break;

	case IPV6_2292HOPOPTS:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.ohopopts = valbool;
		retv = 0;
		break;

	case IPV6_RECVDSTOPTS:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.dstopts = valbool;
		retv = 0;
		break;

	case IPV6_2292DSTOPTS:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.odstopts = valbool;
		retv = 0;
		break;

	case IPV6_TCLASS:
		if (optlen < sizeof(int))
			goto e_inval;
		if (val < -1 || val > 0xff)
			goto e_inval;
		/* RFC 3542, 6.5: default traffic class of 0x0 */
		if (val == -1)
			val = 0;
		np->tclass = val;
		retv = 0;
		break;

	case IPV6_RECVTCLASS:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.rxtclass = valbool;
		retv = 0;
		break;

	case IPV6_FLOWINFO:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.rxflow = valbool;
		retv = 0;
		break;

	case IPV6_RECVPATHMTU:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.rxpmtu = valbool;
		retv = 0;
		break;

	case IPV6_TRANSPARENT:
		if (valbool && !ns_capable(net->user_ns, CAP_NET_ADMIN) &&
		    !ns_capable(net->user_ns, CAP_NET_RAW)) {
			retv = -EPERM;
			break;
		}
		if (optlen < sizeof(int))
			goto e_inval;
		/* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */
		inet_sk(sk)->transparent = valbool;
		retv = 0;
		break;

	case IPV6_RECVORIGDSTADDR:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.rxorigdstaddr = valbool;
		retv = 0;
		break;

	case IPV6_HOPOPTS:
	case IPV6_RTHDRDSTOPTS:
	case IPV6_RTHDR:
	case IPV6_DSTOPTS:
	{
		struct ipv6_txoptions *opt;

		/* 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;

		/* hop-by-hop / destination options are privileged option */
		retv = -EPERM;
		if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW))
			break;

		opt = rcu_dereference_protected(np->opt,
						lockdep_sock_is_held(sk));
		opt = ipv6_renew_options(sk, opt, optname,
					 (struct ipv6_opt_hdr __user *)optval,
					 optlen);
		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))
					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);
		}
		break;
	}

	case IPV6_PKTINFO:
	{
		struct in6_pktinfo pkt;

		if (optlen == 0)
			goto e_inval;
		else if (optlen < sizeof(struct in6_pktinfo) || !optval)
			goto e_inval;

		if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) {
				retv = -EFAULT;
				break;
		}
		if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if)
			goto e_inval;

		np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex;
		np->sticky_pktinfo.ipi6_addr = pkt.ipi6_addr;
		retv = 0;
		break;
	}

	case IPV6_2292PKTOPTIONS:
	{
		struct ipv6_txoptions *opt = NULL;
		struct msghdr msg;
		struct flowi6 fl6;
		struct sockcm_cookie sockc_junk;
		struct ipcm6_cookie ipc6;

		memset(&fl6, 0, sizeof(fl6));
		fl6.flowi6_oif = sk->sk_bound_dev_if;
		fl6.flowi6_mark = sk->sk_mark;

		if (optlen == 0)
			goto update;

		/* 1K is probably excessive
                 * 1K is surely not enough, 2K per standard header is 16K.
                 */
		retv = -EINVAL;
		if (optlen > 64*1024)
			break;

		opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
		retv = -ENOBUFS;
		if (!opt)
			break;

		memset(opt, 0, sizeof(*opt));
		refcount_set(&opt->refcnt, 1);
		opt->tot_len = sizeof(*opt) + optlen;
		retv = -EFAULT;
		if (copy_from_user(opt+1, optval, optlen))
			goto done;

		msg.msg_controllen = optlen;
		msg.msg_control = (void *)(opt+1);
		ipc6.opt = opt;

		retv = ip6_datagram_send_ctl(net, sk, &msg, &fl6, &ipc6, &sockc_junk);
		if (retv)
			goto done;
update:
		retv = 0;
		opt = ipv6_update_options(sk, opt);
done:
		if (opt) {
			atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
			txopt_put(opt);
		}
		break;
	}
	case IPV6_UNICAST_HOPS:
		if (optlen < sizeof(int))
			goto e_inval;
		if (val > 255 || val < -1)
			goto e_inval;
		np->hop_limit = val;
		retv = 0;
		break;

	case IPV6_MULTICAST_HOPS:
		if (sk->sk_type == SOCK_STREAM)
			break;
		if (optlen < sizeof(int))
			goto e_inval;
		if (val > 255 || val < -1)
			goto e_inval;
		np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val);
		retv = 0;
		break;

	case IPV6_MULTICAST_LOOP:
		if (optlen < sizeof(int))
			goto e_inval;
		if (val != valbool)
			goto e_inval;
		np->mc_loop = valbool;
		retv = 0;
		break;

	case IPV6_UNICAST_IF:
	{
		struct net_device *dev = NULL;
		int ifindex;

		if (optlen != sizeof(int))
			goto e_inval;

		ifindex = (__force int)ntohl((__force __be32)val);
		if (ifindex == 0) {
			np->ucast_oif = 0;
			retv = 0;
			break;
		}

		dev = dev_get_by_index(net, ifindex);
		retv = -EADDRNOTAVAIL;
		if (!dev)
			break;
		dev_put(dev);

		retv = -EINVAL;
		if (sk->sk_bound_dev_if)
			break;

		np->ucast_oif = ifindex;
		retv = 0;
		break;
	}

	case IPV6_MULTICAST_IF:
		if (sk->sk_type == SOCK_STREAM)
			break;
		if (optlen < sizeof(int))
			goto e_inval;

		if (val) {
			struct net_device *dev;
			int midx;

			rcu_read_lock();

			dev = dev_get_by_index_rcu(net, val);
			if (!dev) {
				rcu_read_unlock();
				retv = -ENODEV;
				break;
			}
			midx = l3mdev_master_ifindex_rcu(dev);

			rcu_read_unlock();

			if (sk->sk_bound_dev_if &&
			    sk->sk_bound_dev_if != val &&
			    (!midx || midx != sk->sk_bound_dev_if))
				goto e_inval;
		}
		np->mcast_oif = val;
		retv = 0;
		break;
	case IPV6_ADD_MEMBERSHIP:
	case IPV6_DROP_MEMBERSHIP:
	{
		struct ipv6_mreq mreq;

		if (optlen < sizeof(struct ipv6_mreq))
			goto e_inval;

		retv = -EPROTO;
		if (inet_sk(sk)->is_icsk)
			break;

		retv = -EFAULT;
		if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
			break;

		if (optname == IPV6_ADD_MEMBERSHIP)
			retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
		else
			retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
		break;
	}
	case IPV6_JOIN_ANYCAST:
	case IPV6_LEAVE_ANYCAST:
	{
		struct ipv6_mreq mreq;

		if (optlen < sizeof(struct ipv6_mreq))
			goto e_inval;

		retv = -EFAULT;
		if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
			break;

		if (optname == IPV6_JOIN_ANYCAST)
			retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
		else
			retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
		break;
	}
	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);
		else
			retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
						 &psin6->sin6_addr);
		break;
	}
	case MCAST_JOIN_SOURCE_GROUP:
	case MCAST_LEAVE_SOURCE_GROUP:
	case MCAST_BLOCK_SOURCE:
	case MCAST_UNBLOCK_SOURCE:
	{
		struct group_source_req greqs;
		int omode, add;

		if (optlen < sizeof(struct group_source_req))
			goto e_inval;
		if (copy_from_user(&greqs, optval, sizeof(greqs))) {
			retv = -EFAULT;
			break;
		}
		if (greqs.gsr_group.ss_family != AF_INET6 ||
		    greqs.gsr_source.ss_family != AF_INET6) {
			retv = -EADDRNOTAVAIL;
			break;
		}
		if (optname == MCAST_BLOCK_SOURCE) {
			omode = MCAST_EXCLUDE;
			add = 1;
		} else if (optname == MCAST_UNBLOCK_SOURCE) {
			omode = MCAST_EXCLUDE;
			add = 0;
		} else if (optname == MCAST_JOIN_SOURCE_GROUP) {
			struct sockaddr_in6 *psin6;

			psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
			retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
						 &psin6->sin6_addr);
			/* prior join w/ different source is ok */
			if (retv && retv != -EADDRINUSE)
				break;
			omode = MCAST_INCLUDE;
			add = 1;
		} else /* MCAST_LEAVE_SOURCE_GROUP */ {
			omode = MCAST_INCLUDE;
			add = 0;
		}
		retv = ip6_mc_source(add, omode, sk, &greqs);
		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);
		kfree(gsf);

		break;
	}
	case IPV6_ROUTER_ALERT:
		if (optlen < sizeof(int))
			goto e_inval;
		retv = ip6_ra_control(sk, val);
		break;
	case IPV6_MTU_DISCOVER:
		if (optlen < sizeof(int))
			goto e_inval;
		if (val < IPV6_PMTUDISC_DONT || val > IPV6_PMTUDISC_OMIT)
			goto e_inval;
		np->pmtudisc = val;
		retv = 0;
		break;
	case IPV6_MTU:
		if (optlen < sizeof(int))
			goto e_inval;
		if (val && val < IPV6_MIN_MTU)
			goto e_inval;
		np->frag_size = val;
		retv = 0;
		break;
	case IPV6_RECVERR:
		if (optlen < sizeof(int))
			goto e_inval;
		np->recverr = valbool;
		if (!val)
			skb_queue_purge(&sk->sk_error_queue);
		retv = 0;
		break;
	case IPV6_FLOWINFO_SEND:
		if (optlen < sizeof(int))
			goto e_inval;
		np->sndflow = valbool;
		retv = 0;
		break;
	case IPV6_FLOWLABEL_MGR:
		retv = ipv6_flowlabel_opt(sk, optval, optlen);
		break;
	case IPV6_IPSEC_POLICY:
	case IPV6_XFRM_POLICY:
		retv = -EPERM;
		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
			break;
		retv = xfrm_user_policy(sk, optname, optval, optlen);
		break;

	case IPV6_ADDR_PREFERENCES:
	    {
		unsigned int pref = 0;
		unsigned int prefmask = ~0;

		if (optlen < sizeof(int))
			goto e_inval;

		retv = -EINVAL;

		/* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
		switch (val & (IPV6_PREFER_SRC_PUBLIC|
			       IPV6_PREFER_SRC_TMP|
			       IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
		case IPV6_PREFER_SRC_PUBLIC:
			pref |= IPV6_PREFER_SRC_PUBLIC;
			break;
		case IPV6_PREFER_SRC_TMP:
			pref |= IPV6_PREFER_SRC_TMP;
			break;
		case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
			break;
		case 0:
			goto pref_skip_pubtmp;
		default:
			goto e_inval;
		}

		prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
			      IPV6_PREFER_SRC_TMP);
pref_skip_pubtmp:

		/* check HOME/COA conflicts */
		switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
		case IPV6_PREFER_SRC_HOME:
			break;
		case IPV6_PREFER_SRC_COA:
			pref |= IPV6_PREFER_SRC_COA;
		case 0:
			goto pref_skip_coa;
		default:
			goto e_inval;
		}

		prefmask &= ~IPV6_PREFER_SRC_COA;
pref_skip_coa:

		/* check CGA/NONCGA conflicts */
		switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
		case IPV6_PREFER_SRC_CGA:
		case IPV6_PREFER_SRC_NONCGA:
		case 0:
			break;
		default:
			goto e_inval;
		}

		np->srcprefs = (np->srcprefs & prefmask) | pref;
		retv = 0;

		break;
	    }
	case IPV6_MINHOPCOUNT:
		if (optlen < sizeof(int))
			goto e_inval;
		if (val < 0 || val > 255)
			goto e_inval;
		np->min_hopcount = val;
		retv = 0;
		break;
	case IPV6_DONTFRAG:
		np->dontfrag = valbool;
		retv = 0;
		break;
	case IPV6_AUTOFLOWLABEL:
		np->autoflowlabel = valbool;
		retv = 0;
		break;
	case IPV6_RECVFRAGSIZE:
		np->rxopt.bits.recvfragsize = valbool;
		retv = 0;
		break;
	}

	release_sock(sk);
	if (needs_rtnl)
		rtnl_unlock();

	return retv;

e_inval:
	release_sock(sk);
	if (needs_rtnl)
		rtnl_unlock();
	return -EINVAL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
895
27.40%
17
15.74%
Hideaki Yoshifuji / 吉藤英明
835
25.57%
14
12.96%
David L Stevens
519
15.89%
7
6.48%
Erich E. Hoover
109
3.34%
1
0.93%
Eric Dumazet
103
3.15%
6
5.56%
Yang Hongyang
102
3.12%
2
1.85%
Balazs Scheidler
75
2.30%
2
1.85%
Brian Haley
74
2.27%
6
5.56%
Denis V. Lunev
44
1.35%
2
1.85%
David Ahern
42
1.29%
1
0.93%
Stephen Hemminger
39
1.19%
1
0.93%
Gerrit Renker
38
1.16%
2
1.85%
Marcelo Ricardo Leitner
34
1.04%
2
1.85%
David Lebrun
33
1.01%
1
0.93%
Arnaldo Carvalho de Melo
32
0.98%
4
3.70%
Wang Chen
28
0.86%
1
0.93%
David S. Miller
26
0.80%
4
3.70%
Eric W. Biedermann
21
0.64%
2
1.85%
Shan Wei
20
0.61%
1
0.93%
Tom Lendacky
20
0.61%
1
0.93%
Willem de Bruijn
18
0.55%
1
0.93%
Flavio Leitner
15
0.46%
1
0.93%
Linus Torvalds
15
0.46%
1
0.93%
Tom Herbert
14
0.43%
1
0.93%
Masahide Nakamura
14
0.43%
2
1.85%
Herbert Xu
13
0.40%
1
0.93%
Wei Wang
10
0.31%
1
0.93%
Maciej Żenczykowski
9
0.28%
2
1.85%
Li Wei
9
0.28%
1
0.93%
Al Viro
9
0.28%
2
1.85%
Pavel Emelyanov
8
0.24%
1
0.93%
Daniel Lezcano
8
0.24%
1
0.93%
Hannes Frederic Sowa
7
0.21%
4
3.70%
Soheil Hassas Yeganeh
7
0.21%
1
0.93%
Ilpo Järvinen
5
0.15%
1
0.93%
Ian Morris
4
0.12%
1
0.93%
Américo Wang
2
0.06%
2
1.85%
Rémi Denis-Courmont
2
0.06%
1
0.93%
Olaf Kirch
2
0.06%
1
0.93%
Dmitry Mishin
2
0.06%
1
0.93%
Elena Reshetova
1
0.03%
1
0.93%
Tom Parkin
1
0.03%
1
0.93%
Alexey Dobriyan
1
0.03%
1
0.93%
Luiz Fernando N. Capitulino
1
0.03%
1
0.93%
Total
3266
100.00%
108
100.00%



int 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)
		return udp_prot.setsockopt(sk, level, optname, optval, optlen);

	if (level != SOL_IPV6)
		return -ENOPROTOOPT;

	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) {
		lock_sock(sk);
		err = nf_setsockopt(sk, PF_INET6, optname, optval,
				optlen);
		release_sock(sk);
	}
#endif
	return err;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Dmitry Mishin
94
71.21%
1
33.33%
Hideaki Yoshifuji / 吉藤英明
37
28.03%
1
33.33%
David S. Miller
1
0.76%
1
33.33%
Total
132
100.00%
3
100.00%


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;

	if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
		return compat_mc_setsockopt(sk, level, optname, optval, optlen,
			ipv6_setsockopt);

	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) {
		lock_sock(sk);
		err = compat_nf_setsockopt(sk, PF_INET6, optname,
					   optval, optlen);
		release_sock(sk);
	}
#endif
	return err;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Dmitry Mishin
90
48.91%
1
10.00%
Linus Torvalds (pre-git)
63
34.24%
4
40.00%
David L Stevens
26
14.13%
1
10.00%
Arnaldo Carvalho de Melo
3
1.63%
2
20.00%
Al Viro
1
0.54%
1
10.00%
David S. Miller
1
0.54%
1
10.00%
Total
184
100.00%
10
100.00%


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)
{
	struct ipv6_opt_hdr *hdr;

	if (!opt)
		return 0;

	switch (optname) {
	case IPV6_HOPOPTS:
		hdr = opt->hopopt;
		break;
	case IPV6_RTHDRDSTOPTS:
		hdr = opt->dst0opt;
		break;
	case IPV6_RTHDR:
		hdr = (struct ipv6_opt_hdr *)opt->srcrt;
		break;
	case IPV6_DSTOPTS:
		hdr = opt->dst1opt;
		break;
	default:
		return -EINVAL;	/* should not happen */
	}

	if (!hdr)
		return 0;

	len = min_t(unsigned int, len, ipv6_optlen(hdr));
	if (copy_to_user(optval, hdr, len))
		return -EFAULT;
	return len;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Hideaki Yoshifuji / 吉藤英明
63
47.01%
2
33.33%
Dmitry Mishin
53
39.55%
1
16.67%
David S. Miller
14
10.45%
1
16.67%
Chris Wright
3
2.24%
1
16.67%
Yang Hongyang
1
0.75%
1
16.67%
Total
134
100.00%
6
100.00%



static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
		    char __user *optval, int __user *optlen, unsigned int flags)
{
	struct ipv6_pinfo *np = inet6_sk(sk);
	int len;
	int val;

	if (ip6_mroute_opt(optname))
		return ip6_mroute_getsockopt(sk, optname, optval, optlen);

	if (get_user(len, optlen))
		return -EFAULT;
	switch (optname) {
	case IPV6_ADDRFORM:
		if (sk->sk_protocol != IPPROTO_UDP &&
		    sk->sk_protocol != IPPROTO_UDPLITE &&
		    sk->sk_protocol != IPPROTO_TCP)
			return -ENOPROTOOPT;
		if (sk->sk_state != TCP_ESTABLISHED)
			return -ENOTCONN;
		val = sk->sk_family;
		break;
	case MCAST_MSFILTER:
	{
		struct group_filter gsf;
		int err;

		if (len < GROUP_FILTER_SIZE(0))
			return -EINVAL;
		if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
			return -EFAULT;
		if (gsf.gf_group.ss_family != AF_INET6)
			return -EADDRNOTAVAIL;
		lock_sock(sk);
		err = ip6_mc_msfget(sk, &gsf,
			(struct group_filter __user *)optval, optlen);
		release_sock(sk);
		return err;
	}

	case IPV6_2292PKTOPTIONS:
	{
		struct msghdr msg;
		struct sk_buff *skb;

		if (sk->sk_type != SOCK_STREAM)
			return -ENOPROTOOPT;

		msg.msg_control = optval;
		msg.msg_controllen = len;
		msg.msg_flags = flags;

		lock_sock(sk);
		skb = np->pktoptions;
		if (skb)
			ip6_datagram_recv_ctl(sk, &msg, skb);
		release_sock(sk);
		if (!skb) {
			if (np->rxopt.bits.rxinfo) {
				struct in6_pktinfo src_info;
				src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
					np->sticky_pktinfo.ipi6_ifindex;
				src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : np->sticky_pktinfo.ipi6_addr;
				put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
			}
			if (np->rxopt.bits.rxhlim) {
				int hlim = np->mcast_hops;
				put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
			}
			if (np->rxopt.bits.rxtclass) {
				int tclass = (int)ip6_tclass(np->rcv_flowinfo);

				put_cmsg(&msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass);
			}
			if (np->rxopt.bits.rxoinfo) {
				struct in6_pktinfo src_info;
				src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
					np->sticky_pktinfo.ipi6_ifindex;
				src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr :
								     np->sticky_pktinfo.ipi6_addr;
				put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
			}
			if (np->rxopt.bits.rxohlim) {
				int hlim = np->mcast_hops;
				put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
			}
			if (np->rxopt.bits.rxflow) {
				__be32 flowinfo = np->rcv_flowinfo;

				put_cmsg(&msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo);
			}
		}
		len -= msg.msg_controllen;
		return put_user(len, optlen);
	}
	case IPV6_MTU:
	{
		struct dst_entry *dst;

		val = 0;
		rcu_read_lock();
		dst = __sk_dst_get(sk);
		if (dst)
			val = dst_mtu(dst);
		rcu_read_unlock();
		if (!val)
			return -ENOTCONN;
		break;
	}

	case IPV6_V6ONLY:
		val = sk->sk_ipv6only;
		break;

	case IPV6_RECVPKTINFO:
		val = np->rxopt.bits.rxinfo;
		break;

	case IPV6_2292PKTINFO:
		val = np->rxopt.bits.rxoinfo;
		break;

	case IPV6_RECVHOPLIMIT:
		val = np->rxopt.bits.rxhlim;
		break;

	case IPV6_2292HOPLIMIT:
		val = np->rxopt.bits.rxohlim;
		break;

	case IPV6_RECVRTHDR:
		val = np->rxopt.bits.srcrt;
		break;

	case IPV6_2292RTHDR:
		val = np->rxopt.bits.osrcrt;
		break;

	case IPV6_HOPOPTS:
	case IPV6_RTHDRDSTOPTS:
	case IPV6_RTHDR:
	case IPV6_DSTOPTS:
	{
		struct ipv6_txoptions *opt;

		lock_sock(sk);
		opt = rcu_dereference_protected(np->opt,
						lockdep_sock_is_held(sk));
		len = ipv6_getsockopt_sticky(sk, opt, optname, optval, len);
		release_sock(sk);
		/* check if ipv6_getsockopt_sticky() returns err code */
		if (len < 0)
			return len;
		return put_user(len, optlen);
	}

	case IPV6_RECVHOPOPTS:
		val = np->rxopt.bits.hopopts;
		break;

	case IPV6_2292HOPOPTS:
		val = np->rxopt.bits.ohopopts;
		break;

	case IPV6_RECVDSTOPTS:
		val = np->rxopt.bits.dstopts;
		break;

	case IPV6_2292DSTOPTS:
		val = np->rxopt.bits.odstopts;
		break;

	case IPV6_TCLASS:
		val = np->tclass;
		break;

	case IPV6_RECVTCLASS:
		val = np->rxopt.bits.rxtclass;
		break;

	case IPV6_FLOWINFO:
		val = np->rxopt.bits.rxflow;
		break;

	case IPV6_RECVPATHMTU:
		val = np->rxopt.bits.rxpmtu;
		break;

	case IPV6_PATHMTU:
	{
		struct dst_entry *dst;
		struct ip6_mtuinfo mtuinfo;

		if (len < sizeof(mtuinfo))
			return -EINVAL;

		len = sizeof(mtuinfo);
		memset(&mtuinfo, 0, sizeof(mtuinfo));

		rcu_read_lock();
		dst = __sk_dst_get(sk);
		if (dst)
			mtuinfo.ip6m_mtu = dst_mtu(dst);
		rcu_read_unlock();
		if (!mtuinfo.ip6m_mtu)
			return -ENOTCONN;

		if (put_user(len, optlen))
			return -EFAULT;
		if (copy_to_user(optval, &mtuinfo, len))
			return -EFAULT;

		return 0;
	}

	case IPV6_TRANSPARENT:
		val = inet_sk(sk)->transparent;
		break;

	case IPV6_RECVORIGDSTADDR:
		val = np->rxopt.bits.rxorigdstaddr;
		break;

	case IPV6_UNICAST_HOPS:
	case IPV6_MULTICAST_HOPS:
	{
		struct dst_entry *dst;

		if (optname == IPV6_UNICAST_HOPS)
			val = np->hop_limit;
		else
			val = np->mcast_hops;

		if (val < 0) {
			rcu_read_lock();
			dst = __sk_dst_get(sk);
			if (dst)
				val = ip6_dst_hoplimit(dst);
			rcu_read_unlock();
		}

		if (val < 0)
			val = sock_net(sk)->ipv6.devconf_all->hop_limit;
		break;
	}

	case IPV6_MULTICAST_LOOP:
		val = np->mc_loop;
		break;

	case IPV6_MULTICAST_IF:
		val = np->mcast_oif;
		break;

	case IPV6_UNICAST_IF:
		val = (__force int)htonl((__u32) np->ucast_oif);
		break;

	case IPV6_MTU_DISCOVER:
		val = np->pmtudisc;
		break;

	case IPV6_RECVERR:
		val = np->recverr;
		break;

	case IPV6_FLOWINFO_SEND:
		val = np->sndflow;
		break;

	case IPV6_FLOWLABEL_MGR:
	{
		struct in6_flowlabel_req freq;
		int flags;

		if (len < sizeof(freq))
			return -EINVAL;

		if (copy_from_user(&freq, optval, sizeof(freq)))
			return -EFAULT;

		if (freq.flr_action != IPV6_FL_A_GET)
			return -EINVAL;

		len = sizeof(freq);
		flags = freq.flr_flags;

		memset(&freq, 0, sizeof(freq));

		val = ipv6_flowlabel_opt_get(sk, &freq, flags);
		if (val < 0)
			return val;

		if (put_user(len, optlen))
			return -EFAULT;
		if (copy_to_user(optval, &freq, len))
			return -EFAULT;

		return 0;
	}

	case IPV6_ADDR_PREFERENCES:
		val = 0;

		if (np->srcprefs & IPV6_PREFER_SRC_TMP)
			val |= IPV6_PREFER_SRC_TMP;
		else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC)
			val |= IPV6_PREFER_SRC_PUBLIC;
		else {
			/* XXX: should we return system default? */
			val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT;
		}

		if (np->srcprefs & IPV6_PREFER_SRC_COA)
			val |= IPV6_PREFER_SRC_COA;
		else
			val |= IPV6_PREFER_SRC_HOME;
		break;

	case IPV6_MINHOPCOUNT:
		val = np->min_hopcount;
		break;

	case IPV6_DONTFRAG:
		val = np->dontfrag;
		break;

	case IPV6_AUTOFLOWLABEL:
		val = np->autoflowlabel;
		break;

	case IPV6_RECVFRAGSIZE:
		val = np->rxopt.bits.recvfragsize;
		break;

	default:
		return -ENOPROTOOPT;
	}
	len = min_t(unsigned int, sizeof(int), len);
	if (put_user(len, optlen))
		return -EFAULT;
	if (copy_to_user(optval, &val, len))
		return -EFAULT;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
404
26.60%
6
11.32%
Hideaki Yoshifuji / 吉藤英明
336
22.12%
10
18.87%
Brian Haley
186
12.24%
2
3.77%
Florent Fourcot
175
11.52%
5
9.43%
David L Stevens
76
5.00%
1
1.89%
Dmitry Mishin
52
3.42%
1
1.89%
Yang Hongyang
50
3.29%
3
5.66%
Eric Dumazet
49
3.23%
6
11.32%
Jiri Benc
36
2.37%
1
1.89%
David S. Miller
35
2.30%
1
1.89%
Balazs Scheidler
27
1.78%
1
1.89%
Erich E. Hoover
20
1.32%
1
1.89%
Willem de Bruijn
14
0.92%
1
1.89%
Tom Herbert
10
0.66%
1
1.89%
Stephen Hemminger
10
0.66%
1
1.89%
Alexey Dobriyan
8
0.53%
1
1.89%
Gerrit Renker
6
0.39%
1
1.89%
Arnaldo Carvalho de Melo
5
0.33%
1
1.89%
Linus Torvalds
5
0.33%
2
3.77%
Daniel Baluta
4
0.26%
1
1.89%
Li RongQing
4
0.26%
1
1.89%
Alexey Kuznetsov
3
0.20%
1
1.89%
Wei Yongjun
1
0.07%
1
1.89%
Herbert Xu
1
0.07%
1
1.89%
Hannes Frederic Sowa
1
0.07%
1
1.89%
Al Viro
1
0.07%
1
1.89%
Total
1519
100.00%
53
100.00%



int 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)
		return udp_prot.getsockopt(sk, level, optname, optval, optlen);

	if (level != SOL_IPV6)
		return -ENOPROTOOPT;

	err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0);
#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;

		lock_sock(sk);
		err = nf_getsockopt(sk, PF_INET6, optname, optval,
				&len);
		release_sock(sk);
		if (err >= 0)
			err = put_user(len, optlen);
	}
#endif
	return err;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Dmitry Mishin
158
96.93%
1
33.33%
Wei Yongjun
3
1.84%
1
33.33%
Daniel Baluta
2
1.23%
1
33.33%
Total
163
100.00%
3
100.00%


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)
		return compat_mc_getsockopt(sk, level, optname, optval, optlen,
			ipv6_getsockopt);

	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;

		lock_sock(sk);
		err = compat_nf_getsockopt(sk, PF_INET6,
					   optname, optval, &len);
		release_sock(sk);
		if (err >= 0)
			err = put_user(len, optlen);
	}
#endif
	return err;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Dmitry Mishin
182
86.26%
1
20.00%
Pavel Emelyanov
22
10.43%
1
20.00%
Wei Yongjun
3
1.42%
1
20.00%
Daniel Baluta
2
0.95%
1
20.00%
Arnaldo Carvalho de Melo
2
0.95%
1
20.00%
Total
211
100.00%
5
100.00%


EXPORT_SYMBOL(compat_ipv6_getsockopt);
#endif

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
1644
26.80%
21
13.82%
Hideaki Yoshifuji / 吉藤英明
1400
22.82%
20
13.16%
Dmitry Mishin
641
10.45%
1
0.66%
David L Stevens
624
10.17%
8
5.26%
Brian Haley
260
4.24%
7
4.61%
Florent Fourcot
175
2.85%
5
3.29%
Eric Dumazet
161
2.62%
9
5.92%
Yang Hongyang
153
2.49%
6
3.95%
Erich E. Hoover
129
2.10%
1
0.66%
Balazs Scheidler
102
1.66%
2
1.32%
Marcelo Ricardo Leitner
88
1.43%
3
1.97%
David S. Miller
80
1.30%
7
4.61%
Arnaldo Carvalho de Melo
53
0.86%
5
3.29%
Stephen Hemminger
49
0.80%
1
0.66%
Gerrit Renker
47
0.77%
2
1.32%
Denis V. Lunev
44
0.72%
2
1.32%
David Ahern
42
0.68%
1
0.66%
David Lebrun
36
0.59%
1
0.66%
Jiri Benc
36
0.59%
1
0.66%
Willem de Bruijn
32
0.52%
1
0.66%
Pavel Emelyanov
30
0.49%
2
1.32%
Wang Chen
28
0.46%
1
0.66%
Tom Herbert
24
0.39%
1
0.66%
Tom Lendacky
23
0.37%
1
0.66%
Linus Torvalds
21
0.34%
4
2.63%
Eric W. Biedermann
21
0.34%
2
1.32%
Shan Wei
20
0.33%
1
0.66%
Flavio Leitner
15
0.24%
1
0.66%
Herbert Xu
14
0.23%
2
1.32%
Masahide Nakamura
14
0.23%
2
1.32%
Al Viro
11
0.18%
2
1.32%
Wei Wang
10
0.16%
1
0.66%
Alexey Dobriyan
9
0.15%
1
0.66%
Maciej Żenczykowski
9
0.15%
2
1.32%
Li Wei
9
0.15%
1
0.66%
Daniel Baluta
8
0.13%
1
0.66%
Hannes Frederic Sowa
8
0.13%
4
2.63%
Daniel Lezcano
8
0.13%
1
0.66%
Wei Yongjun
7
0.11%
1
0.66%
Soheil Hassas Yeganeh
7
0.11%
1
0.66%
Américo Wang
5
0.08%
2
1.32%
Ilpo Järvinen
5
0.08%
1
0.66%
Ian Morris
5
0.08%
1
0.66%
Li RongQing
4
0.07%
1
0.66%
Thomas Gleixner
4
0.07%
1
0.66%
Randy Dunlap
3
0.05%
1
0.66%
Tejun Heo
3
0.05%
1
0.66%
Alexey Kuznetsov
3
0.05%
1
0.66%
Chris Wright
3
0.05%
1
0.66%
Rémi Denis-Courmont
2
0.03%
1
0.66%
Olaf Kirch
2
0.03%
1
0.66%
Elena Reshetova
1
0.02%
1
0.66%
Tom Parkin
1
0.02%
1
0.66%
Luiz Fernando N. Capitulino
1
0.02%
1
0.66%
Adrian Bunk
1
0.02%
1
0.66%
Total
6135
100.00%
152
100.00%
Directory: net/ipv6

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