ip: fix mc_loop checks for tunnels with multicast outer addresses

[linux-2.6.git] / net / sysctl_net.c

diff --git a/net/sysctl_net.c b/net/sysctl_net.c
index 58a1b6b42dddba6c85c10330bacdb48f7438e4f4..0b15d7250c401356cf0c6e87679437788f157ac8 100644 (file)
--- a/net/sysctl_net.c
+++ b/net/sysctl_net.c
@@ -4,7 +4,6 @@
  * Begun April 1, 1996, Mike Shaver.
  * Added /proc/sys/net directories for each protocol family. [MS]
  *
- * $Log: sysctl_net.c,v $
  * Revision 1.2  1996/05/08  20:24:40  shaver
  * Added bits for NET_BRIDGE and the NET_IPV4_ARP stuff and
  * NET_IPV4_IP_FORWARD.
@@ -12,9 +11,9 @@
  *
  */
 
-#include <linux/config.h>
 #include <linux/mm.h>
 #include <linux/sysctl.h>
+#include <linux/nsproxy.h>
 
 #include <net/sock.h>
 
@@ -30,28 +29,102 @@
 #include <linux/if_tr.h>
 #endif
 
-struct ctl_table net_table[] = {
-       {
-               .ctl_name       = NET_CORE,
-               .procname       = "core",
-               .mode           = 0555,
-               .child          = core_table,
-       },
-#ifdef CONFIG_INET
-       {
-               .ctl_name       = NET_IPV4,
-               .procname       = "ipv4",
-               .mode           = 0555,
-               .child          = ipv4_table
-       },
-#endif
-#ifdef CONFIG_TR
-       {
-               .ctl_name       = NET_TR,
-               .procname       = "token-ring",
-               .mode           = 0555,
-               .child          = tr_table,
-       },
-#endif
-       { 0 },
+static struct ctl_table_set *
+net_ctl_header_lookup(struct ctl_table_root *root, struct nsproxy *namespaces)
+{
+       return &namespaces->net_ns->sysctls;
+}
+
+static int is_seen(struct ctl_table_set *set)
+{
+       return &current->nsproxy->net_ns->sysctls == set;
+}
+
+/* Return standard mode bits for table entry. */
+static int net_ctl_permissions(struct ctl_table_root *root,
+                              struct nsproxy *nsproxy,
+                              struct ctl_table *table)
+{
+       /* Allow network administrator to have same access as root. */
+       if (capable(CAP_NET_ADMIN)) {
+               int mode = (table->mode >> 6) & 7;
+               return (mode << 6) | (mode << 3) | mode;
+       }
+       return table->mode;
+}
+
+static struct ctl_table_root net_sysctl_root = {
+       .lookup = net_ctl_header_lookup,
+       .permissions = net_ctl_permissions,
+};
+
+static int net_ctl_ro_header_perms(struct ctl_table_root *root,
+               struct nsproxy *namespaces, struct ctl_table *table)
+{
+       if (net_eq(namespaces->net_ns, &init_net))
+               return table->mode;
+       else
+               return table->mode & ~0222;
+}
+
+static struct ctl_table_root net_sysctl_ro_root = {
+       .permissions = net_ctl_ro_header_perms,
+};
+
+static int sysctl_net_init(struct net *net)
+{
+       setup_sysctl_set(&net->sysctls,
+                        &net_sysctl_ro_root.default_set,
+                        is_seen);
+       return 0;
+}
+
+static void sysctl_net_exit(struct net *net)
+{
+       WARN_ON(!list_empty(&net->sysctls.list));
+       return;
+}
+
+static struct pernet_operations sysctl_pernet_ops = {
+       .init = sysctl_net_init,
+       .exit = sysctl_net_exit,
 };
+
+static __init int sysctl_init(void)
+{
+       int ret;
+       ret = register_pernet_subsys(&sysctl_pernet_ops);
+       if (ret)
+               goto out;
+       register_sysctl_root(&net_sysctl_root);
+       setup_sysctl_set(&net_sysctl_ro_root.default_set, NULL, NULL);
+       register_sysctl_root(&net_sysctl_ro_root);
+out:
+       return ret;
+}
+subsys_initcall(sysctl_init);
+
+struct ctl_table_header *register_net_sysctl_table(struct net *net,
+       const struct ctl_path *path, struct ctl_table *table)
+{
+       struct nsproxy namespaces;
+       namespaces = *current->nsproxy;
+       namespaces.net_ns = net;
+       return __register_sysctl_paths(&net_sysctl_root,
+                                       &namespaces, path, table);
+}
+EXPORT_SYMBOL_GPL(register_net_sysctl_table);
+
+struct ctl_table_header *register_net_sysctl_rotable(const
+               struct ctl_path *path, struct ctl_table *table)
+{
+       return __register_sysctl_paths(&net_sysctl_ro_root,
+                       &init_nsproxy, path, table);
+}
+EXPORT_SYMBOL_GPL(register_net_sysctl_rotable);
+
+void unregister_net_sysctl_table(struct ctl_table_header *header)
+{
+       unregister_sysctl_table(header);
+}
+EXPORT_SYMBOL_GPL(unregister_net_sysctl_table);