[IPIP]: Add net/ipip_net argument to some functions.

The hashes of tunnels will be per-net too, so prepare all the 
functions that uses them for this change by adding an argument.

Use init_net temporarily in places, where the net does not exist
explicitly yet.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 25 insertions, 19 deletions

diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index e657a6605e08..bc4d4cb89b01 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -138,7 +138,8 @@ static struct ip_tunnel **tunnels[4] = { tunnels_wc, tunnels_l, tunnels_r, tunne
 
 static DEFINE_RWLOCK(ipip_lock);
 
-static struct ip_tunnel * ipip_tunnel_lookup(__be32 remote, __be32 local)
+static struct ip_tunnel * ipip_tunnel_lookup(struct net *net,
+                __be32 remote, __be32 local)
 {
         unsigned h0 = HASH(remote);
         unsigned h1 = HASH(local);
@@ -162,7 +163,8 @@ static struct ip_tunnel * ipip_tunnel_lookup(__be32 remote, __be32 local)
         return NULL;
 }
 
-static struct ip_tunnel **__ipip_bucket(struct ip_tunnel_parm *parms)
+static struct ip_tunnel **__ipip_bucket(struct ipip_net *ipn,
+                struct ip_tunnel_parm *parms)
 {
         __be32 remote = parms->iph.daddr;
         __be32 local = parms->iph.saddr;
@@ -180,16 +182,17 @@ static struct ip_tunnel **__ipip_bucket(struct ip_tunnel_parm *parms)
         return &tunnels[prio][h];
 }
 
-static inline struct ip_tunnel **ipip_bucket(struct ip_tunnel *t)
+static inline struct ip_tunnel **ipip_bucket(struct ipip_net *ipn,
+                struct ip_tunnel *t)
 {
-        return __ipip_bucket(&t->parms);
+        return __ipip_bucket(ipn, &t->parms);
 }
 
-static void ipip_tunnel_unlink(struct ip_tunnel *t)
+static void ipip_tunnel_unlink(struct ipip_net *ipn, struct ip_tunnel *t)
 {
         struct ip_tunnel **tp;
 
-        for (tp = ipip_bucket(t); *tp; tp = &(*tp)->next) {
+        for (tp = ipip_bucket(ipn, t); *tp; tp = &(*tp)->next) {
                 if (t == *tp) {
                         write_lock_bh(&ipip_lock);
                         *tp = t->next;
@@ -199,9 +202,9 @@ static void ipip_tunnel_unlink(struct ip_tunnel *t)
         }
 }
 
-static void ipip_tunnel_link(struct ip_tunnel *t)
+static void ipip_tunnel_link(struct ipip_net *ipn, struct ip_tunnel *t)
 {
-        struct ip_tunnel **tp = ipip_bucket(t);
+        struct ip_tunnel **tp = ipip_bucket(ipn, t);
 
         t->next = *tp;
         write_lock_bh(&ipip_lock);
@@ -209,15 +212,17 @@ static void ipip_tunnel_link(struct ip_tunnel *t)
         write_unlock_bh(&ipip_lock);
 }
 
-static struct ip_tunnel * ipip_tunnel_locate(struct ip_tunnel_parm *parms, int create)
+static struct ip_tunnel * ipip_tunnel_locate(struct net *net,
+                struct ip_tunnel_parm *parms, int create)
 {
         __be32 remote = parms->iph.daddr;
         __be32 local = parms->iph.saddr;
         struct ip_tunnel *t, **tp, *nt;
         struct net_device *dev;
         char name[IFNAMSIZ];
+        struct ipip_net *ipn = net_generic(net, ipip_net_id);
 
-        for (tp = __ipip_bucket(parms); (t = *tp) != NULL; tp = &t->next) {
+        for (tp = __ipip_bucket(ipn, parms); (t = *tp) != NULL; tp = &t->next) {
                 if (local == t->parms.iph.saddr && remote == t->parms.iph.daddr)
                         return t;
         }
@@ -246,7 +251,7 @@ static struct ip_tunnel * ipip_tunnel_locate(struct ip_tunnel_parm *parms, int c
                 goto failed_free;
 
         dev_hold(dev);
-        ipip_tunnel_link(nt);
+        ipip_tunnel_link(ipn, nt);
         return nt;
 
 failed_free:
@@ -264,7 +269,7 @@ static void ipip_tunnel_uninit(struct net_device *dev)
                 tunnels_wc[0] = NULL;
                 write_unlock_bh(&ipip_lock);
         } else
-                ipip_tunnel_unlink(netdev_priv(dev));
+                ipip_tunnel_unlink(ipn, netdev_priv(dev));
         dev_put(dev);
 }
 
@@ -313,7 +318,7 @@ static int ipip_err(struct sk_buff *skb, u32 info)
         err = -ENOENT;
 
         read_lock(&ipip_lock);
-        t = ipip_tunnel_lookup(iph->daddr, iph->saddr);
+        t = ipip_tunnel_lookup(&init_net, iph->daddr, iph->saddr);
         if (t == NULL || t->parms.iph.daddr == 0)
                 goto out;
 
@@ -473,7 +478,8 @@ static int ipip_rcv(struct sk_buff *skb)
         const struct iphdr *iph = ip_hdr(skb);
 
         read_lock(&ipip_lock);
-        if ((tunnel = ipip_tunnel_lookup(iph->saddr, iph->daddr)) != NULL) {
+        if ((tunnel = ipip_tunnel_lookup(&init_net,
+                                        iph->saddr, iph->daddr)) != NULL) {
                 if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
                         read_unlock(&ipip_lock);
                         kfree_skb(skb);
@@ -706,7 +712,7 @@ ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
                                 err = -EFAULT;
                                 break;
                         }
-                        t = ipip_tunnel_locate(&p, 0);
+                        t = ipip_tunnel_locate(net, &p, 0);
                 }
                 if (t == NULL)
                         t = netdev_priv(dev);
@@ -732,7 +738,7 @@ ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
                 if (p.iph.ttl)
                         p.iph.frag_off |= htons(IP_DF);
 
-                t = ipip_tunnel_locate(&p, cmd == SIOCADDTUNNEL);
+                t = ipip_tunnel_locate(net, &p, cmd == SIOCADDTUNNEL);
 
                 if (dev != ipn->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) {
                         if (t != NULL) {
@@ -747,12 +753,12 @@ ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
                                         break;
                                 }
                                 t = netdev_priv(dev);
-                                ipip_tunnel_unlink(t);
+                                ipip_tunnel_unlink(ipn, t);
                                 t->parms.iph.saddr = p.iph.saddr;
                                 t->parms.iph.daddr = p.iph.daddr;
                                 memcpy(dev->dev_addr, &p.iph.saddr, 4);
                                 memcpy(dev->broadcast, &p.iph.daddr, 4);
-                                ipip_tunnel_link(t);
+                                ipip_tunnel_link(ipn, t);
                                 netdev_state_change(dev);
                         }
                 }
@@ -785,7 +791,7 @@ ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
                         if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
                                 goto done;
                         err = -ENOENT;
-                        if ((t = ipip_tunnel_locate(&p, 0)) == NULL)
+                        if ((t = ipip_tunnel_locate(net, &p, 0)) == NULL)
                                 goto done;
                         err = -EPERM;
                         if (t->dev == ipn->fb_tunnel_dev)