[IP6TUNNEL]: Add (ip6_tnl_)net argument to some calls.
Pavel Emelyanov [Wed, 16 Apr 2008 08:22:23 +0000 (01:22 -0700)]
Hashes and fallback device used in them will be per-net.

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

net/ipv6/ip6_tunnel.c

index 2365eb0..fad1af8 100644 (file)
@@ -136,7 +136,7 @@ static inline void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst)
  **/
 
 static struct ip6_tnl *
-ip6_tnl_lookup(struct in6_addr *remote, struct in6_addr *local)
+ip6_tnl_lookup(struct net *net, struct in6_addr *remote, struct in6_addr *local)
 {
        unsigned h0 = HASH(remote);
        unsigned h1 = HASH(local);
@@ -166,7 +166,7 @@ ip6_tnl_lookup(struct in6_addr *remote, struct in6_addr *local)
  **/
 
 static struct ip6_tnl **
-ip6_tnl_bucket(struct ip6_tnl_parm *p)
+ip6_tnl_bucket(struct ip6_tnl_net *ip6n, struct ip6_tnl_parm *p)
 {
        struct in6_addr *remote = &p->raddr;
        struct in6_addr *local = &p->laddr;
@@ -186,9 +186,9 @@ ip6_tnl_bucket(struct ip6_tnl_parm *p)
  **/
 
 static void
-ip6_tnl_link(struct ip6_tnl *t)
+ip6_tnl_link(struct ip6_tnl_net *ip6n, struct ip6_tnl *t)
 {
-       struct ip6_tnl **tp = ip6_tnl_bucket(&t->parms);
+       struct ip6_tnl **tp = ip6_tnl_bucket(ip6n, &t->parms);
 
        t->next = *tp;
        write_lock_bh(&ip6_tnl_lock);
@@ -202,11 +202,11 @@ ip6_tnl_link(struct ip6_tnl *t)
  **/
 
 static void
-ip6_tnl_unlink(struct ip6_tnl *t)
+ip6_tnl_unlink(struct ip6_tnl_net *ip6n, struct ip6_tnl *t)
 {
        struct ip6_tnl **tp;
 
-       for (tp = ip6_tnl_bucket(&t->parms); *tp; tp = &(*tp)->next) {
+       for (tp = ip6_tnl_bucket(ip6n, &t->parms); *tp; tp = &(*tp)->next) {
                if (t == *tp) {
                        write_lock_bh(&ip6_tnl_lock);
                        *tp = t->next;
@@ -228,12 +228,13 @@ ip6_tnl_unlink(struct ip6_tnl *t)
  *   created tunnel or NULL
  **/
 
-static struct ip6_tnl *ip6_tnl_create(struct ip6_tnl_parm *p)
+static struct ip6_tnl *ip6_tnl_create(struct net *net, struct ip6_tnl_parm *p)
 {
        struct net_device *dev;
        struct ip6_tnl *t;
        char name[IFNAMSIZ];
        int err;
+       struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
 
        if (p->name[0])
                strlcpy(name, p->name, IFNAMSIZ);
@@ -257,7 +258,7 @@ static struct ip6_tnl *ip6_tnl_create(struct ip6_tnl_parm *p)
                goto failed_free;
 
        dev_hold(dev);
-       ip6_tnl_link(t);
+       ip6_tnl_link(ip6n, t);
        return t;
 
 failed_free:
@@ -280,20 +281,22 @@ failed:
  *   matching tunnel or NULL
  **/
 
-static struct ip6_tnl *ip6_tnl_locate(struct ip6_tnl_parm *p, int create)
+static struct ip6_tnl *ip6_tnl_locate(struct net *net,
+               struct ip6_tnl_parm *p, int create)
 {
        struct in6_addr *remote = &p->raddr;
        struct in6_addr *local = &p->laddr;
        struct ip6_tnl *t;
+       struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
 
-       for (t = *ip6_tnl_bucket(p); t; t = t->next) {
+       for (t = *ip6_tnl_bucket(ip6n, p); t; t = t->next) {
                if (ipv6_addr_equal(local, &t->parms.laddr) &&
                    ipv6_addr_equal(remote, &t->parms.raddr))
                        return t;
        }
        if (!create)
                return NULL;
-       return ip6_tnl_create(p);
+       return ip6_tnl_create(net, p);
 }
 
 /**
@@ -308,13 +311,15 @@ static void
 ip6_tnl_dev_uninit(struct net_device *dev)
 {
        struct ip6_tnl *t = netdev_priv(dev);
+       struct net *net = dev_net(dev);
+       struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
 
        if (dev == ip6_fb_tnl_dev) {
                write_lock_bh(&ip6_tnl_lock);
                tnls_wc[0] = NULL;
                write_unlock_bh(&ip6_tnl_lock);
        } else {
-               ip6_tnl_unlink(t);
+               ip6_tnl_unlink(ip6n, t);
        }
        ip6_tnl_dst_reset(t);
        dev_put(dev);
@@ -407,7 +412,8 @@ ip6_tnl_err(struct sk_buff *skb, __u8 ipproto, struct inet6_skb_parm *opt,
           processing of the error. */
 
        read_lock(&ip6_tnl_lock);
-       if ((t = ip6_tnl_lookup(&ipv6h->daddr, &ipv6h->saddr)) == NULL)
+       if ((t = ip6_tnl_lookup(&init_net, &ipv6h->daddr,
+                                       &ipv6h->saddr)) == NULL)
                goto out;
 
        if (t->parms.proto != ipproto && t->parms.proto != 0)
@@ -690,7 +696,8 @@ static int ip6_tnl_rcv(struct sk_buff *skb, __u16 protocol,
 
        read_lock(&ip6_tnl_lock);
 
-       if ((t = ip6_tnl_lookup(&ipv6h->saddr, &ipv6h->daddr)) != NULL) {
+       if ((t = ip6_tnl_lookup(&init_net, &ipv6h->saddr,
+                                       &ipv6h->daddr)) != NULL) {
                if (t->parms.proto != ipproto && t->parms.proto != 0) {
                        read_unlock(&ip6_tnl_lock);
                        goto discard;
@@ -1197,6 +1204,8 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
        int err = 0;
        struct ip6_tnl_parm p;
        struct ip6_tnl *t = NULL;
+       struct net *net = dev_net(dev);
+       struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
 
        switch (cmd) {
        case SIOCGETTUNNEL:
@@ -1205,7 +1214,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
                                err = -EFAULT;
                                break;
                        }
-                       t = ip6_tnl_locate(&p, 0);
+                       t = ip6_tnl_locate(net, &p, 0);
                }
                if (t == NULL)
                        t = netdev_priv(dev);
@@ -1226,7 +1235,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
                if (p.proto != IPPROTO_IPV6 && p.proto != IPPROTO_IPIP &&
                    p.proto != 0)
                        break;
-               t = ip6_tnl_locate(&p, cmd == SIOCADDTUNNEL);
+               t = ip6_tnl_locate(net, &p, cmd == SIOCADDTUNNEL);
                if (dev != ip6_fb_tnl_dev && cmd == SIOCCHGTUNNEL) {
                        if (t != NULL) {
                                if (t->dev != dev) {
@@ -1236,9 +1245,9 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
                        } else
                                t = netdev_priv(dev);
 
-                       ip6_tnl_unlink(t);
+                       ip6_tnl_unlink(ip6n, t);
                        err = ip6_tnl_change(t, &p);
-                       ip6_tnl_link(t);
+                       ip6_tnl_link(ip6n, t);
                        netdev_state_change(dev);
                }
                if (t) {
@@ -1259,7 +1268,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
                        if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p)))
                                break;
                        err = -ENOENT;
-                       if ((t = ip6_tnl_locate(&p, 0)) == NULL)
+                       if ((t = ip6_tnl_locate(net, &p, 0)) == NULL)
                                break;
                        err = -EPERM;
                        if (t->dev == ip6_fb_tnl_dev)