netns: ip6mr: declare mroute_do_assert and mroute_do_pim per-namespace

Preliminary work to make IPv6 multicast forwarding netns-aware.

Declare IPv6 multicast forwarding variables 'mroute_do_assert' and
'mroute_do_pim' per-namespace in struct netns_ipv6.

At the moment, these variables are only referenced in init_net.

Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 12 insertions, 16 deletions

diff --git a/include/net/netns/ipv6.h b/include/net/netns/ipv6.h
index 30572f3f9781..919cb0f20055 100644
--- a/include/net/netns/ipv6.h
+++ b/include/net/netns/ipv6.h
@@ -61,6 +61,8 @@ struct netns_ipv6 {
         struct mif_device       *vif6_table;
         int                     maxvif;
         atomic_t                cache_resolve_queue_len;
+        int                     mroute_do_assert;
+        int                     mroute_do_pim;
 #endif
 };
 #endif
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 077c8198eb53..2d2ac23b8606 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -61,13 +61,6 @@ static DEFINE_RWLOCK(mrt_lock);
 
 #define MIF_EXISTS(_net, _idx) ((_net)->ipv6.vif6_table[_idx].dev != NULL)
 
-static int mroute_do_assert;                            /* Set in PIM assert    */
-#ifdef CONFIG_IPV6_PIMSM_V2
-static int mroute_do_pim;
-#else
-#define mroute_do_pim 0
-#endif
-
 static struct mfc6_cache *mfc_unres_queue;              /* Queue of unresolved entries */
 
 /* Special spinlock for queue of unresolved entries */
@@ -1306,7 +1299,7 @@ int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, int
                 int v;
                 if (get_user(v, (int __user *)optval))
                         return -EFAULT;
-                mroute_do_assert = !!v;
+                init_net.ipv6.mroute_do_assert = !!v;
                 return 0;
         }
 
@@ -1319,10 +1312,10 @@ int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, int
                 v = !!v;
                 rtnl_lock();
                 ret = 0;
-                if (v != mroute_do_pim) {
-                        mroute_do_pim = v;
-                        mroute_do_assert = v;
-                        if (mroute_do_pim)
+                if (v != init_net.ipv6.mroute_do_pim) {
+                        init_net.ipv6.mroute_do_pim = v;
+                        init_net.ipv6.mroute_do_assert = v;
+                        if (init_net.ipv6.mroute_do_pim)
                                 ret = inet6_add_protocol(&pim6_protocol,
                                                          IPPROTO_PIM);
                         else
@@ -1361,11 +1354,11 @@ int ip6_mroute_getsockopt(struct sock *sk, int optname, char __user *optval,
                 break;
 #ifdef CONFIG_IPV6_PIMSM_V2
         case MRT6_PIM:
-                val = mroute_do_pim;
+                val = init_net.ipv6.mroute_do_pim;
                 break;
 #endif
         case MRT6_ASSERT:
-                val = mroute_do_assert;
+                val = init_net.ipv6.mroute_do_assert;
                 break;
         default:
                 return -ENOPROTOOPT;
@@ -1553,13 +1546,14 @@ static int ip6_mr_forward(struct sk_buff *skb, struct mfc6_cache *cache)
                 cache->mfc_un.res.wrong_if++;
                 true_vifi = ip6mr_find_vif(skb->dev);
 
-                if (true_vifi >= 0 && mroute_do_assert &&
+                if (true_vifi >= 0 && init_net.ipv6.mroute_do_assert &&
                     /* pimsm uses asserts, when switching from RPT to SPT,
                        so that we cannot check that packet arrived on an oif.
                        It is bad, but otherwise we would need to move pretty
                        large chunk of pimd to kernel. Ough... --ANK
                      */
-                    (mroute_do_pim || cache->mfc_un.res.ttls[true_vifi] < 255) &&
+                    (init_net.ipv6.mroute_do_pim ||
+                     cache->mfc_un.res.ttls[true_vifi] < 255) &&
                     time_after(jiffies,
                                cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) {
                         cache->mfc_un.res.last_assert = jiffies;