Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6.git] / net / ipv6 / addrconf.c
index 597487a..8c1e86a 100644 (file)
@@ -503,7 +503,7 @@ static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
                return 0;
 
        if (!rtnl_trylock())
-               return -ERESTARTSYS;
+               return restart_syscall();
 
        if (p == &net->ipv6.devconf_all->forwarding) {
                __s32 newf = net->ipv6.devconf_all->forwarding;
@@ -591,7 +591,6 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
 {
        struct inet6_ifaddr *ifa = NULL;
        struct rt6_info *rt;
-       struct net *net = dev_net(idev->dev);
        int hash;
        int err = 0;
        int addr_type = ipv6_addr_type(addr);
@@ -608,7 +607,7 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
                goto out2;
        }
 
-       if (idev->cnf.disable_ipv6 || net->ipv6.devconf_all->disable_ipv6) {
+       if (idev->cnf.disable_ipv6) {
                err = -EACCES;
                goto out2;
        }
@@ -1520,6 +1519,8 @@ static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
 
 int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
 {
+       if (addr == 0)
+               return -1;
        eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
                  ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
                  ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
@@ -1750,6 +1751,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
        __u32 prefered_lft;
        int addr_type;
        struct inet6_dev *in6_dev;
+       struct net *net = dev_net(dev);
 
        pinfo = (struct prefix_info *) opt;
 
@@ -1807,7 +1809,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
                if (addrconf_finite_timeout(rt_expires))
                        rt_expires *= HZ;
 
-               rt = rt6_lookup(dev_net(dev), &pinfo->prefix, NULL,
+               rt = rt6_lookup(net, &pinfo->prefix, NULL,
                                dev->ifindex, 1);
 
                if (rt && addrconf_is_prefix_route(rt)) {
@@ -1844,7 +1846,6 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
                struct inet6_ifaddr * ifp;
                struct in6_addr addr;
                int create = 0, update_lft = 0;
-               struct net *net = dev_net(dev);
 
                if (pinfo->prefix_len == 64) {
                        memcpy(&addr, &pinfo->prefix, 8);
@@ -3986,6 +3987,75 @@ static int addrconf_sysctl_forward_strategy(ctl_table *table,
        return addrconf_fixup_forwarding(table, valp, val);
 }
 
+static void dev_disable_change(struct inet6_dev *idev)
+{
+       if (!idev || !idev->dev)
+               return;
+
+       if (idev->cnf.disable_ipv6)
+               addrconf_notify(NULL, NETDEV_DOWN, idev->dev);
+       else
+               addrconf_notify(NULL, NETDEV_UP, idev->dev);
+}
+
+static void addrconf_disable_change(struct net *net, __s32 newf)
+{
+       struct net_device *dev;
+       struct inet6_dev *idev;
+
+       read_lock(&dev_base_lock);
+       for_each_netdev(net, dev) {
+               rcu_read_lock();
+               idev = __in6_dev_get(dev);
+               if (idev) {
+                       int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
+                       idev->cnf.disable_ipv6 = newf;
+                       if (changed)
+                               dev_disable_change(idev);
+               }
+               rcu_read_unlock();
+       }
+       read_unlock(&dev_base_lock);
+}
+
+static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int old)
+{
+       struct net *net;
+
+       net = (struct net *)table->extra2;
+
+       if (p == &net->ipv6.devconf_dflt->disable_ipv6)
+               return 0;
+
+       if (!rtnl_trylock())
+               return restart_syscall();
+
+       if (p == &net->ipv6.devconf_all->disable_ipv6) {
+               __s32 newf = net->ipv6.devconf_all->disable_ipv6;
+               net->ipv6.devconf_dflt->disable_ipv6 = newf;
+               addrconf_disable_change(net, newf);
+       } else if ((!*p) ^ (!old))
+               dev_disable_change((struct inet6_dev *)table->extra1);
+
+       rtnl_unlock();
+       return 0;
+}
+
+static
+int addrconf_sysctl_disable(ctl_table *ctl, int write, struct file * filp,
+                           void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+       int *valp = ctl->data;
+       int val = *valp;
+       int ret;
+
+       ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
+
+       if (write)
+               ret = addrconf_disable_ipv6(ctl, valp, val);
+       return ret;
+}
+
 static struct addrconf_sysctl_table
 {
        struct ctl_table_header *sysctl_header;
@@ -4223,7 +4293,8 @@ static struct addrconf_sysctl_table
                        .data           =       &ipv6_devconf.disable_ipv6,
                        .maxlen         =       sizeof(int),
                        .mode           =       0644,
-                       .proc_handler   =       proc_dointvec,
+                       .proc_handler   =       addrconf_sysctl_disable,
+                       .strategy       =       sysctl_intvec,
                },
                {
                        .ctl_name       =       CTL_UNNUMBERED,
@@ -4344,6 +4415,10 @@ static int addrconf_init_net(struct net *net)
                dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
                if (dflt == NULL)
                        goto err_alloc_dflt;
+       } else {
+               /* these will be inherited by all namespaces */
+               dflt->autoconf = ipv6_defaults.autoconf;
+               dflt->disable_ipv6 = ipv6_defaults.disable_ipv6;
        }
 
        net->ipv6.devconf_all = all;