netns: ipmr: declare mroute_do_assert and mroute_do_pim per-namespace

Preliminary work to make IPv4 multicast routing netns-aware.

Declare IPv multicast routing variables 'mroute_do_assert' and
'mroute_do_pim' per-namespace in struct netns_ipv4.

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>

1 files changed, 11 insertions, 13 deletions

diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index feafd14eb7b9..d6a28acc0683 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -79,9 +79,6 @@ static DEFINE_RWLOCK(mrt_lock);
 
 #define VIF_EXISTS(_net, _idx) ((_net)->ipv4.vif_table[_idx].dev != NULL)
 
-static int mroute_do_assert;                            /* Set in PIM assert    */
-static int mroute_do_pim;
-
 static struct mfc_cache *mfc_unres_queue;               /* Queue of unresolved entries */
 
 /* Special spinlock for queue of unresolved entries */
@@ -1003,7 +1000,7 @@ int ip_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)?1:0;
+                init_net.ipv4.mroute_do_assert = (v) ? 1 : 0;
                 return 0;
         }
 #ifdef CONFIG_IP_PIMSM
@@ -1017,11 +1014,11 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, int
 
                 rtnl_lock();
                 ret = 0;
-                if (v != mroute_do_pim) {
-                        mroute_do_pim = v;
-                        mroute_do_assert = v;
+                if (v != init_net.ipv4.mroute_do_pim) {
+                        init_net.ipv4.mroute_do_pim = v;
+                        init_net.ipv4.mroute_do_assert = v;
 #ifdef CONFIG_IP_PIMSM_V2
-                        if (mroute_do_pim)
+                        if (init_net.ipv4.mroute_do_pim)
                                 ret = inet_add_protocol(&pim_protocol,
                                                         IPPROTO_PIM);
                         else
@@ -1073,10 +1070,10 @@ int ip_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, int
                 val = 0x0305;
 #ifdef CONFIG_IP_PIMSM
         else if (optname == MRT_PIM)
-                val = mroute_do_pim;
+                val = init_net.ipv4.mroute_do_pim;
 #endif
         else
-                val = mroute_do_assert;
+                val = init_net.ipv4.mroute_do_assert;
         if (copy_to_user(optval, &val, olr))
                 return -EFAULT;
         return 0;
@@ -1356,13 +1353,14 @@ static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local
                 cache->mfc_un.res.wrong_if++;
                 true_vifi = ipmr_find_vif(skb->dev);
 
-                if (true_vifi >= 0 && mroute_do_assert &&
+                if (true_vifi >= 0 && init_net.ipv4.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.ipv4.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;
@@ -1550,7 +1548,7 @@ int pim_rcv_v1(struct sk_buff * skb)
 
         pim = igmp_hdr(skb);
 
-        if (!mroute_do_pim ||
+        if (!init_net.ipv4.mroute_do_pim ||
             pim->group != PIM_V1_VERSION || pim->code != PIM_V1_REGISTER)
                 goto drop;