cregit-Linux how code gets into the kernel

Release 4.11 net/ipv6/mcast.c

Directory: net/ipv6
/*
 *      Multicast support for IPv6
 *      Linux INET6 implementation
 *
 *      Authors:
 *      Pedro Roque             <roque@di.fc.ul.pt>
 *
 *      Based on linux/ipv4/igmp.c and linux/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.
 */

/* Changes:
 *
 *      yoshfuji        : fix format of router-alert option
 *      YOSHIFUJI Hideaki @USAGI:
 *              Fixed source address for MLD message based on
 *              <draft-ietf-magma-mld-source-05.txt>.
 *      YOSHIFUJI Hideaki @USAGI:
 *              - Ignore Queries for invalid addresses.
 *              - MLD for link-local addresses.
 *      David L Stevens <dlstevens@us.ibm.com>:
 *              - MLDv2 support
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/jiffies.h>
#include <linux/times.h>
#include <linux/net.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/route.h>
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/pkt_sched.h>
#include <net/mld.h>

#include <linux/netfilter.h>
#include <linux/netfilter_ipv6.h>

#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/snmp.h>

#include <net/ipv6.h>
#include <net/protocol.h>
#include <net/if_inet6.h>
#include <net/ndisc.h>
#include <net/addrconf.h>
#include <net/ip6_route.h>
#include <net/inet_common.h>

#include <net/ip6_checksum.h>

/* Ensure that we have struct in6_addr aligned on 32bit word. */

static void *__mld2_query_bugs[] __attribute__((__unused__)) = {
	BUILD_BUG_ON_NULL(offsetof(struct mld2_query, mld2q_srcs) % 4),
	BUILD_BUG_ON_NULL(offsetof(struct mld2_report, mld2r_grec) % 4),
	BUILD_BUG_ON_NULL(offsetof(struct mld2_grec, grec_mca) % 4)
};


static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;

static void igmp6_join_group(struct ifmcaddr6 *ma);
static void igmp6_leave_group(struct ifmcaddr6 *ma);
static void igmp6_timer_handler(unsigned long data);

static void mld_gq_timer_expire(unsigned long data);
static void mld_ifc_timer_expire(unsigned long data);
static void mld_ifc_event(struct inet6_dev *idev);
static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
static void mld_del_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
static void mld_clear_delrec(struct inet6_dev *idev);
static bool mld_in_v1_mode(const struct inet6_dev *idev);
static int sf_setstate(struct ifmcaddr6 *pmc);
static void sf_markstate(struct ifmcaddr6 *pmc);
static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
			  int sfmode, int sfcount, const struct in6_addr *psfsrc,
			  int delta);
static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
			  int sfmode, int sfcount, const struct in6_addr *psfsrc,
			  int delta);
static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
			    struct inet6_dev *idev);


#define MLD_QRV_DEFAULT		2
/* RFC3810, 9.2. Query Interval */

#define MLD_QI_DEFAULT		(125 * HZ)
/* RFC3810, 9.3. Query Response Interval */

#define MLD_QRI_DEFAULT		(10 * HZ)

/* RFC3810, 8.1 Query Version Distinctions */

#define MLD_V1_QUERY_LEN	24

#define MLD_V2_QUERY_LEN_MIN	28


#define IPV6_MLD_MAX_MSF	64


int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF;

int sysctl_mld_qrv __read_mostly = MLD_QRV_DEFAULT;

/*
 *      socket join on multicast group
 */


#define for_each_pmc_rcu(np, pmc)				\
	for (pmc = rcu_dereference(np->ipv6_mc_list);           \
             pmc != NULL;                                       \
             pmc = rcu_dereference(pmc->next))




static int unsolicited_report_interval(struct inet6_dev *idev)
{
	int iv;

	if (mld_in_v1_mode(idev))
		iv = idev->cnf.mldv1_unsolicited_report_interval;
	else
		iv = idev->cnf.mldv2_unsolicited_report_interval;

	return iv > 0 ? iv : 1;
}


Contributors
PersonTokensPropCommitsCommitProp
Hannes Frederic Sowa4697.87%150.00%


Daniel Borkmann12.13%150.00%


Total47100.00%2100.00%






int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
{
	struct net_device *dev = NULL;
	struct ipv6_mc_socklist *mc_lst;
	struct ipv6_pinfo *np = inet6_sk(sk);
	struct net *net = sock_net(sk);
	int err;

	ASSERT_RTNL();

	if (!ipv6_addr_is_multicast(addr))
		return -EINVAL;

	rcu_read_lock();
	for_each_pmc_rcu(np, mc_lst) {
		if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
		    ipv6_addr_equal(&mc_lst->addr, addr)) {
			rcu_read_unlock();
			return -EADDRINUSE;
		}
	}
	rcu_read_unlock();

	mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);

	if (!mc_lst)
		return -ENOMEM;

	mc_lst->next = NULL;
	mc_lst->addr = *addr;

	if (ifindex == 0) {
		struct rt6_info *rt;
		rt = rt6_lookup(net, addr, NULL, 0, 0);
		if (rt) {
			dev = rt->dst.dev;
			ip6_rt_put(rt);
		}
	} else
		dev = __dev_get_by_index(net, ifindex);

	if (!dev) {
		sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
		return -ENODEV;
	}

	mc_lst->ifindex = dev->ifindex;
	mc_lst->sfmode = MCAST_EXCLUDE;
	rwlock_init(&mc_lst->sflock);
	mc_lst->sflist = NULL;

	/*
         *      now add/increase the group membership on the device
         */

	err = ipv6_dev_mc_inc(dev, addr);

	if (err) {
		sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
		return err;
	}

	mc_lst->next = np->ipv6_mc_list;
	rcu_assign_pointer(np->ipv6_mc_list, mc_lst);

	return 0;
}

Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)16050.96%416.67%


David L Stevens9329.62%312.50%


Eric Dumazet154.78%14.17%


Daniel Lezcano103.18%28.33%


Hideaki Yoshifuji / 吉藤英明92.87%416.67%


Linus Torvalds82.55%14.17%


Madhu Challa72.23%14.17%


David S. Miller30.96%14.17%


Alexey Dobriyan20.64%14.17%


Ian Morris20.64%14.17%


Américo Wang20.64%28.33%


Eric W. Biedermann10.32%14.17%


Al Viro10.32%14.17%


Marcelo Ricardo Leitner10.32%14.17%


Total314100.00%24100.00%




EXPORT_SYMBOL(ipv6_sock_mc_join);

/*
 *      socket leave on multicast group
 */



int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
{
	struct ipv6_pinfo *np = inet6_sk(sk);
	struct ipv6_mc_socklist *mc_lst;
	struct ipv6_mc_socklist __rcu **lnk;
	struct net *net = sock_net(sk);

	ASSERT_RTNL();

	if (!ipv6_addr_is_multicast(addr))
		return -EINVAL;

	for (lnk = &np->ipv6_mc_list;
	     (mc_lst = rtnl_dereference(*lnk)) != NULL;
	      lnk = &mc_lst->next) {
		if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
		    ipv6_addr_equal(&mc_lst->addr, addr)) {
			struct net_device *dev;

			*lnk = mc_lst->next;

			dev = __dev_get_by_index(net, mc_lst->ifindex);
			if (dev) {
				struct inet6_dev *idev = __in6_dev_get(dev);

				(void) ip6_mc_leave_src(sk, mc_lst, idev);
				if (idev)
					__ipv6_dev_mc_dec(idev, &mc_lst->addr);
			} else
				(void) ip6_mc_leave_src(sk, mc_lst, NULL);

			atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
			kfree_rcu(mc_lst, rcu);
			return 0;
		}
	}

	return -EADDRNOTAVAIL;
}

Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)11550.44%625.00%


David L Stevens4017.54%28.33%


Eric Dumazet187.89%28.33%


Daniel Lezcano125.26%14.17%


Li Wei125.26%14.17%


Madhu Challa83.51%14.17%


Alexey Kuznetsov83.51%14.17%


Hideaki Yoshifuji / 吉藤英明62.63%416.67%


David S. Miller31.32%14.17%


Américo Wang20.88%28.33%


Lai Jiangshan20.88%14.17%


Marcelo Ricardo Leitner10.44%14.17%


Eric W. Biedermann10.44%14.17%


Total228100.00%24100.00%




EXPORT_SYMBOL(ipv6_sock_mc_drop);

/* called with rcu_read_lock() */



static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net,
					     const struct in6_addr *group,
					     int ifindex)
{
	struct net_device *dev = NULL;
	struct inet6_dev *idev = NULL;

	if (ifindex == 0) {
		struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0);

		if (rt) {
			dev = rt->dst.dev;
			ip6_rt_put(rt);
		}
	} else
		dev = dev_get_by_index_rcu(net, ifindex);

	if (!dev)
		return NULL;
	idev = __in6_dev_get(dev);
	if (!idev)
		return NULL;
	read_lock_bh(&idev->lock);
	if (idev->dead) {
		read_unlock_bh(&idev->lock);
		return NULL;
	}
	return idev;
}


Contributors
PersonTokensPropCommitsCommitProp
David L Stevens6746.53%16.67%


Linus Torvalds (pre-git)4329.86%533.33%


Eric Dumazet1711.81%213.33%


Daniel Lezcano85.56%213.33%


Al Viro32.08%16.67%


David S. Miller32.08%16.67%


Américo Wang10.69%16.67%


Eric W. Biedermann10.69%16.67%


Adrian Bunk10.69%16.67%


Total144100.00%15100.00%






void __ipv6_sock_mc_close(struct sock *sk)
{
	struct ipv6_pinfo *np = inet6_sk(sk);
	struct ipv6_mc_socklist *mc_lst;
	struct net *net = sock_net(sk);

	ASSERT_RTNL();

	while ((mc_lst = rtnl_dereference(np->ipv6_mc_list)) != NULL) {
		struct net_device *dev;

		np->ipv6_mc_list = mc_lst->next;

		dev = __dev_get_by_index(net, mc_lst->ifindex);
		if (dev) {
			struct inet6_dev *idev = __in6_dev_get(dev);

			(void) ip6_mc_leave_src(sk, mc_lst, idev);
			if (idev)
				__ipv6_dev_mc_dec(idev, &mc_lst->addr);
		} else
			(void) ip6_mc_leave_src(sk, mc_lst, NULL);

		atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
		kfree_rcu(mc_lst, rcu);
	}
}


Contributors
PersonTokensPropCommitsCommitProp
David L Stevens7850.32%212.50%


Linus Torvalds (pre-git)3019.35%212.50%


Eric Dumazet149.03%212.50%


David S. Miller117.10%16.25%


Daniel Lezcano85.16%16.25%


Américo Wang53.23%318.75%


Hideaki Yoshifuji / 吉藤英明42.58%212.50%


Lai Jiangshan21.29%16.25%


Sabrina Dubroca21.29%16.25%


Eric W. Biedermann10.65%16.25%


Total155100.00%16100.00%






void ipv6_sock_mc_close(struct sock *sk)
{
	struct ipv6_pinfo *np = inet6_sk(sk);

	if (!rcu_access_pointer(np->ipv6_mc_list))
		return;
	rtnl_lock();
	__ipv6_sock_mc_close(sk);
	rtnl_unlock();
}


Contributors
PersonTokensPropCommitsCommitProp
Américo Wang3890.48%133.33%


Sabrina Dubroca37.14%133.33%


Linus Torvalds (pre-git)12.38%133.33%


Total42100.00%3100.00%






int ip6_mc_source(int add, int omode, struct sock *sk,
	struct group_source_req *pgsr)
{
	struct in6_addr *source, *group;
	struct ipv6_mc_socklist *pmc;
	struct inet6_dev *idev;
	struct ipv6_pinfo *inet6 = inet6_sk(sk);
	struct ip6_sf_socklist *psl;
	struct net *net = sock_net(sk);
	int i, j, rv;
	int leavegroup = 0;
	int pmclocked = 0;
	int err;

	source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
	group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;

	if (!ipv6_addr_is_multicast(group))
		return -EINVAL;

	rcu_read_lock();
	idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface);
	if (!idev) {
		rcu_read_unlock();
		return -ENODEV;
	}

	err = -EADDRNOTAVAIL;

	for_each_pmc_rcu(inet6, pmc) {
		if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
			continue;
		if (ipv6_addr_equal(&pmc->addr, group))
			break;
	}
	if (!pmc) {		/* must have a prior join */
		err = -EINVAL;
		goto done;
	}
	/* if a source filter was set, must be the same mode as before */
	if (pmc->sflist) {
		if (pmc->sfmode != omode) {
			err = -EINVAL;
			goto done;
		}
	} else if (pmc->sfmode != omode) {
		/* allow mode switches for empty-set filters */
		ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
		ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
		pmc->sfmode = omode;
	}

	write_lock(&pmc->sflock);
	pmclocked = 1;

	psl = pmc->sflist;
	if (!add) {
		if (!psl)
			goto done;	/* err = -EADDRNOTAVAIL */
		rv = !0;
		for (i = 0; i < psl->sl_count; i++) {
			rv = !ipv6_addr_equal(&psl->sl_addr[i], source);
			if (rv == 0)
				break;
		}
		if (rv)		/* source not found */
			goto done;	/* err = -EADDRNOTAVAIL */

		/* special case - (INCLUDE, empty) == LEAVE_GROUP */
		if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
			leavegroup = 1;
			goto done;
		}

		/* update the interface filter */
		ip6_mc_del_src(idev, group, omode, 1, source, 1);

		for (j = i+1; j < psl->sl_count; j++)
			psl->sl_addr[j-1] = psl->sl_addr[j];
		psl->sl_count--;
		err = 0;
		goto done;
	}
	/* else, add a new source to the filter */

	if (psl && psl->sl_count >= sysctl_mld_max_msf) {
		err = -ENOBUFS;
		goto done;
	}
	if (!psl || psl->sl_count == psl->sl_max) {
		struct ip6_sf_socklist *newpsl;
		int count = IP6_SFBLOCK;

		if (psl)
			count += psl->sl_max;
		newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
		if (!newpsl) {
			err = -ENOBUFS;
			goto done;
		}
		newpsl->sl_max = count;
		newpsl->sl_count = count - IP6_SFBLOCK;
		if (psl) {
			for (i = 0; i < psl->sl_count; i++)
				newpsl->sl_addr[i] = psl->sl_addr[i];
			sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
		}
		pmc->sflist = psl = newpsl;
	}
	rv = 1;	/* > 0 for insert logic below if sl_count is 0 */
	for (i = 0; i < psl->sl_count; i++) {
		rv = !ipv6_addr_equal(&psl->sl_addr[i], source);
		if (rv == 0) /* There is an error in the address. */
			goto done;
	}
	for (j = psl->sl_count-1; j >= i; j--)
		psl->sl_addr[j+1] = psl->sl_addr[j];
	psl->sl_addr[i] = *source;
	psl->sl_count++;
	err = 0;
	/* update the interface list */
	ip6_mc_add_src(idev, group, omode, 1, source, 1);
done:
	if (pmclocked)
		write_unlock(&pmc->sflock);
	read_unlock_bh(&idev->lock);
	rcu_read_unlock();
	if (leavegroup)
		err = ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
David L Stevens58174.30%726.92%


Linus Torvalds (pre-git)14718.80%726.92%


Eric Dumazet172.17%27.69%


Chris Wright101.28%13.85%


Daniel Lezcano91.15%13.85%


Hideaki Yoshifuji / 吉藤英明91.15%415.38%


Marcelo Ricardo Leitner30.38%13.85%


Al Viro20.26%13.85%


Andrew Morton20.26%13.85%


Jean Sacren20.26%13.85%


Total782100.00%26100.00%






int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
{
	const struct in6_addr *group;
	struct ipv6_mc_socklist *pmc;
	struct inet6_dev *idev;
	struct ipv6_pinfo *inet6 = inet6_sk(sk);
	struct ip6_sf_socklist *newpsl, *psl;
	struct net *net = sock_net(sk);
	int leavegroup = 0;
	int i, err;

	group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;

	if (!ipv6_addr_is_multicast(group))
		return -EINVAL;
	if (gsf->gf_fmode != MCAST_INCLUDE &&
	    gsf->gf_fmode != MCAST_EXCLUDE)
		return -EINVAL;

	rcu_read_lock();
	idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);

	if (!idev) {
		rcu_read_unlock();
		return -ENODEV;
	}

	err = 0;

	if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
		leavegroup = 1;
		goto done;
	}

	for_each_pmc_rcu(inet6, pmc) {
		if (pmc->ifindex != gsf->gf_interface)
			continue;
		if (ipv6_addr_equal(&pmc->addr, group))
			break;
	}
	if (!pmc) {		/* must have a prior join */
		err = -EINVAL;
		goto done;
	}
	if (gsf->gf_numsrc) {
		newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
							  GFP_ATOMIC);
		if (!newpsl) {
			err = -ENOBUFS;
			goto done;
		}
		newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
		for (i = 0; i < newpsl->sl_count; ++i) {
			struct sockaddr_in6 *psin6;

			psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
			newpsl->sl_addr[i] = psin6->sin6_addr;
		}
		err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
			newpsl->sl_count, newpsl->sl_addr, 0);
		if (err) {
			sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
			goto done;
		}
	} else {
		newpsl = NULL;
		(void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
	}

	write_lock(&pmc->sflock);
	psl = pmc->sflist;
	if (psl) {
		(void) ip6_mc_del_src(idev, group, pmc->sfmode,
			psl->sl_count, psl->sl_addr, 0);
		sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
	} else
		(void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
	pmc->sflist = newpsl;
	pmc->sfmode = gsf->gf_fmode;
	write_unlock(&pmc->sflock);
	err = 0;
done:
	read_unlock_bh(&idev->lock);
	rcu_read_unlock();
	if (leavegroup)
		err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
David L Stevens39374.01%421.05%


Linus Torvalds (pre-git)7614.31%526.32%


Yan Zheng224.14%15.26%


Eric Dumazet203.77%315.79%


Daniel Lezcano91.69%15.26%


Hideaki Yoshifuji / 吉藤英明50.94%315.79%


David S. Miller40.75%15.26%


Al Viro20.38%15.26%


Total531100.00%19100.00%






int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
	struct group_filter __user *optval, int __user *optlen)
{
	int err, i, count, copycount;
	const struct in6_addr *group;
	struct ipv6_mc_socklist *pmc;
	struct inet6_dev *idev;
	struct ipv6_pinfo *inet6 = inet6_sk(sk);
	struct ip6_sf_socklist *psl;
	struct net *net = sock_net(sk);

	group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;

	if (!ipv6_addr_is_multicast(group))
		return -EINVAL;

	rcu_read_lock();
	idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);

	if (!idev) {
		rcu_read_unlock();
		return -ENODEV;
	}

	err = -EADDRNOTAVAIL;
	/* changes to the ipv6_mc_list require the socket lock and
         * rtnl lock. We have the socket lock and rcu read lock,
         * so reading the list is safe.
         */

	for_each_pmc_rcu(inet6, pmc) {
		if (pmc->ifindex != gsf->gf_interface)
			continue;
		if (ipv6_addr_equal(group, &pmc->addr))
			break;
	}
	if (!pmc)		/* must have a prior join */
		goto done;
	gsf->gf_fmode = pmc->sfmode;
	psl = pmc->sflist;
	count = psl ? psl->sl_count : 0;
	read_unlock_bh(&idev->lock);
	rcu_read_unlock();

	copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
	gsf->gf_numsrc = count;
	if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
	    copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
		return -EFAULT;
	}
	/* changes to psl require the socket lock, and a write lock
         * on pmc->sflock. We have the socket lock so reading here is safe.
         */
	for (i = 0; i < copycount; i++) {
		struct sockaddr_in6 *psin6;
		struct sockaddr_storage ss;

		psin6 = (struct sockaddr_in6 *)&ss;
		memset(&ss, 0, sizeof(ss));
		psin6->sin6_family = AF_INET6;
		psin6->sin6_addr = psl->sl_addr[i];
		if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
			return -EFAULT;
	}
	return 0;
done:
	read_unlock_bh(&idev->lock);
	rcu_read_unlock();
	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
David L Stevens25968.88%16.25%


Linus Torvalds (pre-git)7921.01%637.50%


Eric Dumazet205.32%318.75%


Daniel Lezcano92.39%16.25%


Hideaki Yoshifuji / 吉藤英明51.33%318.75%


Al Viro20.53%16.25%


Américo Wang20.53%16.25%


Total376100.00%16100.00%






bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
		    const struct in6_addr *src_addr)
{
	struct ipv6_pinfo *np = inet6_sk(sk);
	struct ipv6_mc_socklist *mc;
	struct ip6_sf_socklist *psl;
	bool rv = true;

	rcu_read_lock()