X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=net%2Fsysctl_net.c;h=972201cd5fa76791be3d558252d3efb5b009f92e;hb=9ea319b61613085f501a79cf8d405cb221d084f3;hp=a4f0ed8d0e791ba3a63df38c7676f2c8446461a1;hpb=3e37c3f9978839d91188e4ca0cc662a7245f28e4;p=linux-2.6

diff --git a/net/sysctl_net.c b/net/sysctl_net.c
index a4f0ed8d0e..972201cd5f 100644
--- 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.
@@ -30,37 +29,59 @@
 #include <linux/if_tr.h>
 #endif
 
-struct ctl_table net_table[] = {
-#ifdef CONFIG_TR
-	{
-		.ctl_name	= NET_TR,
-		.procname	= "token-ring",
-		.mode		= 0555,
-		.child		= tr_table,
-	},
-#endif
-	{ 0 },
-};
-
-static struct list_head *
+static struct ctl_table_set *
 net_ctl_header_lookup(struct ctl_table_root *root, struct nsproxy *namespaces)
 {
-	return &namespaces->net_ns->sysctl_table_headers;
+	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 (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)
 {
-	INIT_LIST_HEAD(&net->sysctl_table_headers);
+	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->sysctl_table_headers));
+	WARN_ON(!list_empty(&net->sysctls.list));
 	return;
 }
 
@@ -76,6 +97,8 @@ static __init int sysctl_init(void)
 	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;
 }
@@ -92,8 +115,16 @@ struct ctl_table_header *register_net_sysctl_table(struct net *net,
 }
 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)
 {
-	return unregister_sysctl_table(header);
+	unregister_sysctl_table(header);
 }
 EXPORT_SYMBOL_GPL(unregister_net_sysctl_table);