Linux-libre 4.6.2-gnu

1 files changed, 48 insertions, 30 deletions

diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index b3086cf27..9b4ca87f7 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -107,12 +107,6 @@
 #include <linux/seq_file.h>
 #endif
 
-#define IP_MAX_MEMBERSHIPS	20
-#define IP_MAX_MSF		10
-
-/* IGMP reports for link-local multicast groups are enabled by default */
-int sysctl_igmp_llm_reports __read_mostly = 1;
-
 #ifdef CONFIG_IP_MULTICAST
 /* Parameter names and values are taken from igmp-v2-06 draft */
 
@@ -432,6 +426,7 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ip_mc_list *pmc,
 	int type, int gdeleted, int sdeleted)
 {
 	struct net_device *dev = pmc->interface->dev;
+	struct net *net = dev_net(dev);
 	struct igmpv3_report *pih;
 	struct igmpv3_grec *pgr = NULL;
 	struct ip_sf_list *psf, *psf_next, *psf_prev, **psf_list;
@@ -439,7 +434,7 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ip_mc_list *pmc,
 
 	if (pmc->multiaddr == IGMP_ALL_HOSTS)
 		return skb;
-	if (ipv4_is_local_multicast(pmc->multiaddr) && !sysctl_igmp_llm_reports)
+	if (ipv4_is_local_multicast(pmc->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports)
 		return skb;
 
 	isquery = type == IGMPV3_MODE_IS_INCLUDE ||
@@ -542,6 +537,7 @@ empty_source:
 static int igmpv3_send_report(struct in_device *in_dev, struct ip_mc_list *pmc)
 {
 	struct sk_buff *skb = NULL;
+	struct net *net = dev_net(in_dev->dev);
 	int type;
 
 	if (!pmc) {
@@ -550,7 +546,7 @@ static int igmpv3_send_report(struct in_device *in_dev, struct ip_mc_list *pmc)
 			if (pmc->multiaddr == IGMP_ALL_HOSTS)
 				continue;
 			if (ipv4_is_local_multicast(pmc->multiaddr) &&
-			     !sysctl_igmp_llm_reports)
+			     !net->ipv4.sysctl_igmp_llm_reports)
 				continue;
 			spin_lock_bh(&pmc->lock);
 			if (pmc->sfcount[MCAST_EXCLUDE])
@@ -686,7 +682,7 @@ static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
 	if (type == IGMPV3_HOST_MEMBERSHIP_REPORT)
 		return igmpv3_send_report(in_dev, pmc);
 
-	if (ipv4_is_local_multicast(group) && !sysctl_igmp_llm_reports)
+	if (ipv4_is_local_multicast(group) && !net->ipv4.sysctl_igmp_llm_reports)
 		return 0;
 
 	if (type == IGMP_HOST_LEAVE_MESSAGE)
@@ -765,9 +761,10 @@ static void igmp_ifc_timer_expire(unsigned long data)
 
 static void igmp_ifc_event(struct in_device *in_dev)
 {
+	struct net *net = dev_net(in_dev->dev);
 	if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev))
 		return;
-	in_dev->mr_ifc_count = in_dev->mr_qrv ?: sysctl_igmp_qrv;
+	in_dev->mr_ifc_count = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;
 	igmp_ifc_start_timer(in_dev, 1);
 }
 
@@ -857,12 +854,13 @@ static int igmp_marksources(struct ip_mc_list *pmc, int nsrcs, __be32 *srcs)
 static bool igmp_heard_report(struct in_device *in_dev, __be32 group)
 {
 	struct ip_mc_list *im;
+	struct net *net = dev_net(in_dev->dev);
 
 	/* Timers are only set for non-local groups */
 
 	if (group == IGMP_ALL_HOSTS)
 		return false;
-	if (ipv4_is_local_multicast(group) && !sysctl_igmp_llm_reports)
+	if (ipv4_is_local_multicast(group) && !net->ipv4.sysctl_igmp_llm_reports)
 		return false;
 
 	rcu_read_lock();
@@ -886,6 +884,7 @@ static bool igmp_heard_query(struct in_device *in_dev, struct sk_buff *skb,
 	__be32			group = ih->group;
 	int			max_delay;
 	int			mark = 0;
+	struct net		*net = dev_net(in_dev->dev);
 
 
 	if (len == 8) {
@@ -971,7 +970,7 @@ static bool igmp_heard_query(struct in_device *in_dev, struct sk_buff *skb,
 		if (im->multiaddr == IGMP_ALL_HOSTS)
 			continue;
 		if (ipv4_is_local_multicast(im->multiaddr) &&
-		    !sysctl_igmp_llm_reports)
+		    !net->ipv4.sysctl_igmp_llm_reports)
 			continue;
 		spin_lock_bh(&im->lock);
 		if (im->tm_running)
@@ -1087,6 +1086,7 @@ static void ip_mc_filter_del(struct in_device *in_dev, __be32 addr)
 static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im)
 {
 	struct ip_mc_list *pmc;
+	struct net *net = dev_net(in_dev->dev);
 
 	/* this is an "ip_mc_list" for convenience; only the fields below
 	 * are actually used. In particular, the refcnt and users are not
@@ -1101,7 +1101,7 @@ static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im)
 	pmc->interface = im->interface;
 	in_dev_hold(in_dev);
 	pmc->multiaddr = im->multiaddr;
-	pmc->crcount = in_dev->mr_qrv ?: sysctl_igmp_qrv;
+	pmc->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;
 	pmc->sfmode = im->sfmode;
 	if (pmc->sfmode == MCAST_INCLUDE) {
 		struct ip_sf_list *psf;
@@ -1186,6 +1186,7 @@ static void igmp_group_dropped(struct ip_mc_list *im)
 {
 	struct in_device *in_dev = im->interface;
 #ifdef CONFIG_IP_MULTICAST
+	struct net *net = dev_net(in_dev->dev);
 	int reporter;
 #endif
 
@@ -1197,7 +1198,7 @@ static void igmp_group_dropped(struct ip_mc_list *im)
 #ifdef CONFIG_IP_MULTICAST
 	if (im->multiaddr == IGMP_ALL_HOSTS)
 		return;
-	if (ipv4_is_local_multicast(im->multiaddr) && !sysctl_igmp_llm_reports)
+	if (ipv4_is_local_multicast(im->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports)
 		return;
 
 	reporter = im->reporter;
@@ -1222,6 +1223,9 @@ static void igmp_group_dropped(struct ip_mc_list *im)
 static void igmp_group_added(struct ip_mc_list *im)
 {
 	struct in_device *in_dev = im->interface;
+#ifdef CONFIG_IP_MULTICAST
+	struct net *net = dev_net(in_dev->dev);
+#endif
 
 	if (im->loaded == 0) {
 		im->loaded = 1;
@@ -1231,7 +1235,7 @@ static void igmp_group_added(struct ip_mc_list *im)
 #ifdef CONFIG_IP_MULTICAST
 	if (im->multiaddr == IGMP_ALL_HOSTS)
 		return;
-	if (ipv4_is_local_multicast(im->multiaddr) && !sysctl_igmp_llm_reports)
+	if (ipv4_is_local_multicast(im->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports)
 		return;
 
 	if (in_dev->dead)
@@ -1244,7 +1248,7 @@ static void igmp_group_added(struct ip_mc_list *im)
 	}
 	/* else, v3 */
 
-	im->crcount = in_dev->mr_qrv ?: sysctl_igmp_qrv;
+	im->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;
 	igmp_ifc_event(in_dev);
 #endif
 }
@@ -1313,6 +1317,9 @@ static void ip_mc_hash_remove(struct in_device *in_dev,
 void ip_mc_inc_group(struct in_device *in_dev, __be32 addr)
 {
 	struct ip_mc_list *im;
+#ifdef CONFIG_IP_MULTICAST
+	struct net *net = dev_net(in_dev->dev);
+#endif
 
 	ASSERT_RTNL();
 
@@ -1339,7 +1346,7 @@ void ip_mc_inc_group(struct in_device *in_dev, __be32 addr)
 	spin_lock_init(&im->lock);
 #ifdef CONFIG_IP_MULTICAST
 	setup_timer(&im->timer, igmp_timer_expire, (unsigned long)im);
-	im->unsolicit_count = sysctl_igmp_qrv;
+	im->unsolicit_count = net->ipv4.sysctl_igmp_qrv;
 #endif
 
 	im->next_rcu = in_dev->mc_list;
@@ -1532,6 +1539,7 @@ static void ip_mc_rejoin_groups(struct in_device *in_dev)
 #ifdef CONFIG_IP_MULTICAST
 	struct ip_mc_list *im;
 	int type;
+	struct net *net = dev_net(in_dev->dev);
 
 	ASSERT_RTNL();
 
@@ -1539,7 +1547,7 @@ static void ip_mc_rejoin_groups(struct in_device *in_dev)
 		if (im->multiaddr == IGMP_ALL_HOSTS)
 			continue;
 		if (ipv4_is_local_multicast(im->multiaddr) &&
-		    !sysctl_igmp_llm_reports)
+		    !net->ipv4.sysctl_igmp_llm_reports)
 			continue;
 
 		/* a failover is happening and switches
@@ -1638,6 +1646,9 @@ void ip_mc_down(struct in_device *in_dev)
 
 void ip_mc_init_dev(struct in_device *in_dev)
 {
+#ifdef CONFIG_IP_MULTICAST
+	struct net *net = dev_net(in_dev->dev);
+#endif
 	ASSERT_RTNL();
 
 #ifdef CONFIG_IP_MULTICAST
@@ -1645,7 +1656,7 @@ void ip_mc_init_dev(struct in_device *in_dev)
 			(unsigned long)in_dev);
 	setup_timer(&in_dev->mr_ifc_timer, igmp_ifc_timer_expire,
 			(unsigned long)in_dev);
-	in_dev->mr_qrv = sysctl_igmp_qrv;
+	in_dev->mr_qrv = net->ipv4.sysctl_igmp_qrv;
 #endif
 
 	spin_lock_init(&in_dev->mc_tomb_lock);
@@ -1656,11 +1667,14 @@ void ip_mc_init_dev(struct in_device *in_dev)
 void ip_mc_up(struct in_device *in_dev)
 {
 	struct ip_mc_list *pmc;
+#ifdef CONFIG_IP_MULTICAST
+	struct net *net = dev_net(in_dev->dev);
+#endif
 
 	ASSERT_RTNL();
 
 #ifdef CONFIG_IP_MULTICAST
-	in_dev->mr_qrv = sysctl_igmp_qrv;
+	in_dev->mr_qrv = net->ipv4.sysctl_igmp_qrv;
 #endif
 	ip_mc_inc_group(in_dev, IGMP_ALL_HOSTS);
 
@@ -1726,11 +1740,6 @@ static struct in_device *ip_mc_find_dev(struct net *net, struct ip_mreqn *imr)
 /*
  *	Join a socket to a group
  */
-int sysctl_igmp_max_memberships __read_mostly = IP_MAX_MEMBERSHIPS;
-int sysctl_igmp_max_msf __read_mostly = IP_MAX_MSF;
-#ifdef CONFIG_IP_MULTICAST
-int sysctl_igmp_qrv __read_mostly = IGMP_QUERY_ROBUSTNESS_VARIABLE;
-#endif
 
 static int ip_mc_del1_src(struct ip_mc_list *pmc, int sfmode,
 	__be32 *psfsrc)
@@ -1755,6 +1764,7 @@ static int ip_mc_del1_src(struct ip_mc_list *pmc, int sfmode,
 	if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
 #ifdef CONFIG_IP_MULTICAST
 		struct in_device *in_dev = pmc->interface;
+		struct net *net = dev_net(in_dev->dev);
 #endif
 
 		/* no more filters for this source */
@@ -1765,7 +1775,7 @@ static int ip_mc_del1_src(struct ip_mc_list *pmc, int sfmode,
 #ifdef CONFIG_IP_MULTICAST
 		if (psf->sf_oldin &&
 		    !IGMP_V1_SEEN(in_dev) && !IGMP_V2_SEEN(in_dev)) {
-			psf->sf_crcount = in_dev->mr_qrv ?: sysctl_igmp_qrv;
+			psf->sf_crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;
 			psf->sf_next = pmc->tomb;
 			pmc->tomb = psf;
 			rv = 1;
@@ -1823,12 +1833,13 @@ static int ip_mc_del_src(struct in_device *in_dev, __be32 *pmca, int sfmode,
 	    pmc->sfcount[MCAST_INCLUDE]) {
 #ifdef CONFIG_IP_MULTICAST
 		struct ip_sf_list *psf;
+		struct net *net = dev_net(in_dev->dev);
 #endif
 
 		/* filter mode change */
 		pmc->sfmode = MCAST_INCLUDE;
 #ifdef CONFIG_IP_MULTICAST
-		pmc->crcount = in_dev->mr_qrv ?: sysctl_igmp_qrv;
+		pmc->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;
 		in_dev->mr_ifc_count = pmc->crcount;
 		for (psf = pmc->sources; psf; psf = psf->sf_next)
 			psf->sf_crcount = 0;
@@ -1995,6 +2006,7 @@ static int ip_mc_add_src(struct in_device *in_dev, __be32 *pmca, int sfmode,
 	} else if (isexclude != (pmc->sfcount[MCAST_EXCLUDE] != 0)) {
 #ifdef CONFIG_IP_MULTICAST
 		struct ip_sf_list *psf;
+		struct net *net = dev_net(pmc->interface->dev);
 		in_dev = pmc->interface;
 #endif
 
@@ -2006,7 +2018,7 @@ static int ip_mc_add_src(struct in_device *in_dev, __be32 *pmca, int sfmode,
 #ifdef CONFIG_IP_MULTICAST
 		/* else no filters; keep old mode for reports */
 
-		pmc->crcount = in_dev->mr_qrv ?: sysctl_igmp_qrv;
+		pmc->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;
 		in_dev->mr_ifc_count = pmc->crcount;
 		for (psf = pmc->sources; psf; psf = psf->sf_next)
 			psf->sf_crcount = 0;
@@ -2073,7 +2085,7 @@ int ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr)
 		count++;
 	}
 	err = -ENOBUFS;
-	if (count >= sysctl_igmp_max_memberships)
+	if (count >= net->ipv4.sysctl_igmp_max_memberships)
 		goto done;
 	iml = sock_kmalloc(sk, sizeof(*iml), GFP_KERNEL);
 	if (!iml)
@@ -2245,7 +2257,7 @@ int ip_mc_source(int add, int omode, struct sock *sk, struct
 	}
 	/* else, add a new source to the filter */
 
-	if (psl && psl->sl_count >= sysctl_igmp_max_msf) {
+	if (psl && psl->sl_count >= net->ipv4.sysctl_igmp_max_msf) {
 		err = -ENOBUFS;
 		goto done;
 	}
@@ -2918,6 +2930,12 @@ static int __net_init igmp_net_init(struct net *net)
 		goto out_sock;
 	}
 
+	/* Sysctl initialization */
+	net->ipv4.sysctl_igmp_max_memberships = 20;
+	net->ipv4.sysctl_igmp_max_msf = 10;
+	/* IGMP reports for link-local multicast groups are enabled by default */
+	net->ipv4.sysctl_igmp_llm_reports = 1;
+	net->ipv4.sysctl_igmp_qrv = 2;
 	return 0;
 
 out_sock: