This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / net / netfilter / nf_sysctl.c

diff --git a/net/netfilter/nf_sysctl.c b/net/netfilter/nf_sysctl.c
new file mode 100644 (file)
index 0000000..06ddddb
--- /dev/null
+++ b/net/netfilter/nf_sysctl.c
@@ -0,0 +1,134 @@
+/* nf_sysctl.c netfilter sysctl registration/unregistation
+ *
+ * Copyright (c) 2006 Patrick McHardy <kaber@trash.net>
+ */
+#include <linux/module.h>
+#include <linux/sysctl.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+
+static void
+path_free(struct ctl_table *path, struct ctl_table *table)
+{
+       struct ctl_table *t, *next;
+
+       for (t = path; t != NULL && t != table; t = next) {
+               next = t->child;
+               kfree(t);
+       }
+}
+
+static struct ctl_table *
+path_dup(struct ctl_table *path, struct ctl_table *table)
+{
+       struct ctl_table *t, *last = NULL, *tmp;
+
+       for (t = path; t != NULL; t = t->child) {
+               /* twice the size since path elements are terminated by an
+                * empty element */
+               tmp = kmemdup(t, 2 * sizeof(*t), GFP_KERNEL);
+               if (tmp == NULL) {
+                       if (last != NULL)
+                               path_free(path, table);
+                       return NULL;
+               }
+
+               if (last != NULL)
+                       last->child = tmp;
+               else
+                       path = tmp;
+               last = tmp;
+       }
+
+       if (last != NULL)
+               last->child = table;
+       else
+               path = table;
+
+       return path;
+}
+
+struct ctl_table_header *
+nf_register_sysctl_table(struct ctl_table *path, struct ctl_table *table)
+{
+       struct ctl_table_header *header;
+
+       path = path_dup(path, table);
+       if (path == NULL)
+               return NULL;
+       header = register_sysctl_table(path, 0);
+       if (header == NULL)
+               path_free(path, table);
+       return header;
+}
+EXPORT_SYMBOL_GPL(nf_register_sysctl_table);
+
+void
+nf_unregister_sysctl_table(struct ctl_table_header *header,
+                          struct ctl_table *table)
+{
+       struct ctl_table *path = header->ctl_table;
+
+       unregister_sysctl_table(header);
+       path_free(path, table);
+}
+EXPORT_SYMBOL_GPL(nf_unregister_sysctl_table);
+
+/* net/netfilter */
+static struct ctl_table nf_net_netfilter_table[] = {
+       {
+               .ctl_name       = NET_NETFILTER,
+               .procname       = "netfilter",
+               .mode           = 0555,
+       },
+       {
+               .ctl_name       = 0
+       }
+};
+struct ctl_table nf_net_netfilter_sysctl_path[] = {
+       {
+               .ctl_name       = CTL_NET,
+               .procname       = "net",
+               .mode           = 0555,
+               .child          = nf_net_netfilter_table,
+       },
+       {
+               .ctl_name       = 0
+       }
+};
+EXPORT_SYMBOL_GPL(nf_net_netfilter_sysctl_path);
+
+/* net/ipv4/netfilter */
+static struct ctl_table nf_net_ipv4_netfilter_table[] = {
+       {
+               .ctl_name       = NET_IPV4_NETFILTER,
+               .procname       = "netfilter",
+               .mode           = 0555,
+       },
+       {
+               .ctl_name       = 0
+       }
+};
+static struct ctl_table nf_net_ipv4_table[] = {
+       {
+               .ctl_name       = NET_IPV4,
+               .procname       = "ipv4",
+               .mode           = 0555,
+               .child          = nf_net_ipv4_netfilter_table,
+       },
+       {
+               .ctl_name       = 0
+       }
+};
+struct ctl_table nf_net_ipv4_netfilter_sysctl_path[] = {
+       {
+               .ctl_name       = CTL_NET,
+               .procname       = "net",
+               .mode           = 0555,
+               .child          = nf_net_ipv4_table,
+       },
+       {
+               .ctl_name       = 0
+       }
+};
+EXPORT_SYMBOL_GPL(nf_net_ipv4_netfilter_sysctl_path);