* 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.
#include <linux/mm.h>
#include <linux/sysctl.h>
+#include <linux/nsproxy.h>
#include <net/sock.h>
#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 ¤t->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 (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);