1 files changed, 15 insertions, 16 deletions

diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 890c4258804c..4146153d875d 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -117,7 +117,7 @@
 #define IGMP_V2_Unsolicited_Report_Interval     (10*HZ)
 #define IGMP_V3_Unsolicited_Report_Interval     (1*HZ)
 #define IGMP_Query_Response_Interval            (10*HZ)
-#define IGMP_Unsolicited_Report_Count           2
+#define IGMP_Query_Robustness_Variable          2
 
 
 #define IGMP_Initial_Report_Delay               (1)
@@ -756,8 +756,7 @@ static void igmp_ifc_event(struct in_device *in_dev)
 {
         if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev))
                 return;
-        in_dev->mr_ifc_count = in_dev->mr_qrv ? in_dev->mr_qrv :
-                IGMP_Unsolicited_Report_Count;
+        in_dev->mr_ifc_count = in_dev->mr_qrv ?: sysctl_igmp_qrv;
         igmp_ifc_start_timer(in_dev, 1);
 }
 
@@ -1086,8 +1085,7 @@ 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 ? in_dev->mr_qrv :
-                IGMP_Unsolicited_Report_Count;
+        pmc->crcount = in_dev->mr_qrv ?: sysctl_igmp_qrv;
         pmc->sfmode = im->sfmode;
         if (pmc->sfmode == MCAST_INCLUDE) {
                 struct ip_sf_list *psf;
@@ -1226,8 +1224,7 @@ static void igmp_group_added(struct ip_mc_list *im)
         }
         /* else, v3 */
 
-        im->crcount = in_dev->mr_qrv ? in_dev->mr_qrv :
-                IGMP_Unsolicited_Report_Count;
+        im->crcount = in_dev->mr_qrv ?: sysctl_igmp_qrv;
         igmp_ifc_event(in_dev);
 #endif
 }
@@ -1322,7 +1319,7 @@ 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 = IGMP_Unsolicited_Report_Count;
+        im->unsolicit_count = sysctl_igmp_qrv;
 #endif
 
         im->next_rcu = in_dev->mc_list;
@@ -1460,7 +1457,7 @@ 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 = IGMP_Unsolicited_Report_Count;
+        in_dev->mr_qrv = sysctl_igmp_qrv;
 #endif
 
         spin_lock_init(&in_dev->mc_tomb_lock);
@@ -1474,6 +1471,9 @@ void ip_mc_up(struct in_device *in_dev)
 
         ASSERT_RTNL();
 
+#ifdef CONFIG_IP_MULTICAST
+        in_dev->mr_qrv = sysctl_igmp_qrv;
+#endif
         ip_mc_inc_group(in_dev, IGMP_ALL_HOSTS);
 
         for_each_pmc_rtnl(in_dev, pmc)
@@ -1540,7 +1540,9 @@ static struct in_device *ip_mc_find_dev(struct net *net, struct ip_mreqn *imr)
  */
 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)
@@ -1575,8 +1577,7 @@ 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 ? in_dev->mr_qrv :
-                                IGMP_Unsolicited_Report_Count;
+                        psf->sf_crcount = in_dev->mr_qrv ?: sysctl_igmp_qrv;
                         psf->sf_next = pmc->tomb;
                         pmc->tomb = psf;
                         rv = 1;
@@ -1639,8 +1640,7 @@ static int ip_mc_del_src(struct in_device *in_dev, __be32 *pmca, int sfmode,
                 /* filter mode change */
                 pmc->sfmode = MCAST_INCLUDE;
 #ifdef CONFIG_IP_MULTICAST
-                pmc->crcount = in_dev->mr_qrv ? in_dev->mr_qrv :
-                        IGMP_Unsolicited_Report_Count;
+                pmc->crcount = in_dev->mr_qrv ?: sysctl_igmp_qrv;
                 in_dev->mr_ifc_count = pmc->crcount;
                 for (psf = pmc->sources; psf; psf = psf->sf_next)
                         psf->sf_crcount = 0;
@@ -1818,8 +1818,7 @@ 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 ? in_dev->mr_qrv :
-                        IGMP_Unsolicited_Report_Count;
+                pmc->crcount = in_dev->mr_qrv ?: sysctl_igmp_qrv;
                 in_dev->mr_ifc_count = pmc->crcount;
                 for (psf = pmc->sources; psf; psf = psf->sf_next)
                         psf->sf_crcount = 0;