4 files changed, 20 insertions, 66 deletions

diff --git a/net/Makefile b/net/Makefile
index 95fc694e4ddc..38704bdf941a 100644
--- a/net/Makefile
+++ b/net/Makefile
@@ -5,8 +5,6 @@
 # Rewritten to use lists instead of if-statements.
 #
 
-obj-y   := nonet.o
-
 obj-$(CONFIG_NET)               := socket.o core/
 
 tmp-$(CONFIG_COMPAT)            := compat.o
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 7f155175bba8..ce780c722e48 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -337,17 +337,17 @@ EXPORT_SYMBOL_GPL(__put_net);
 
 struct net *get_net_ns_by_fd(int fd)
 {
-        struct proc_ns *ei;
         struct file *file;
+        struct ns_common *ns;
         struct net *net;
 
         file = proc_ns_fget(fd);
         if (IS_ERR(file))
                 return ERR_CAST(file);
 
-        ei = get_proc_ns(file_inode(file));
-        if (ei->ns_ops == &netns_operations)
-                net = get_net(ei->ns);
+        ns = get_proc_ns(file_inode(file));
+        if (ns->ops == &netns_operations)
+                net = get_net(container_of(ns, struct net, ns));
         else
                 net = ERR_PTR(-EINVAL);
 
@@ -386,12 +386,15 @@ EXPORT_SYMBOL_GPL(get_net_ns_by_pid);
 
 static __net_init int net_ns_net_init(struct net *net)
 {
-        return proc_alloc_inum(&net->proc_inum);
+#ifdef CONFIG_NET_NS
+        net->ns.ops = &netns_operations;
+#endif
+        return ns_alloc_inum(&net->ns);
 }
 
 static __net_exit void net_ns_net_exit(struct net *net)
 {
-        proc_free_inum(net->proc_inum);
+        ns_free_inum(&net->ns);
 }
 
 static struct pernet_operations __net_initdata net_ns_ops = {
@@ -629,7 +632,7 @@ void unregister_pernet_device(struct pernet_operations *ops)
 EXPORT_SYMBOL_GPL(unregister_pernet_device);
 
 #ifdef CONFIG_NET_NS
-static void *netns_get(struct task_struct *task)
+static struct ns_common *netns_get(struct task_struct *task)
 {
         struct net *net = NULL;
         struct nsproxy *nsproxy;
@@ -640,17 +643,22 @@ static void *netns_get(struct task_struct *task)
                 net = get_net(nsproxy->net_ns);
         task_unlock(task);
 
-        return net;
+        return net ? &net->ns : NULL;
 }
 
-static void netns_put(void *ns)
+static inline struct net *to_net_ns(struct ns_common *ns)
 {
-        put_net(ns);
+        return container_of(ns, struct net, ns);
 }
 
-static int netns_install(struct nsproxy *nsproxy, void *ns)
+static void netns_put(struct ns_common *ns)
 {
-        struct net *net = ns;
+        put_net(to_net_ns(ns));
+}
+
+static int netns_install(struct nsproxy *nsproxy, struct ns_common *ns)
+{
+        struct net *net = to_net_ns(ns);
 
         if (!ns_capable(net->user_ns, CAP_SYS_ADMIN) ||
             !ns_capable(current_user_ns(), CAP_SYS_ADMIN))
@@ -661,18 +669,11 @@ static int netns_install(struct nsproxy *nsproxy, void *ns)
         return 0;
 }
 
-static unsigned int netns_inum(void *ns)
-{
-        struct net *net = ns;
-        return net->proc_inum;
-}
-
 const struct proc_ns_operations netns_operations = {
         .name           = "net",
         .type           = CLONE_NEWNET,
         .get            = netns_get,
         .put            = netns_put,
         .install        = netns_install,
-        .inum           = netns_inum,
 };
 #endif
diff --git a/net/nonet.c b/net/nonet.c
deleted file mode 100644
index b1a73fda9c12..000000000000
--- a/net/nonet.c
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * net/nonet.c
- *
- * Dummy functions to allow us to configure network support entirely
- * out of the kernel.
- *
- * Distributed under the terms of the GNU GPL version 2.
- * Copyright (c) Matthew Wilcox 2003
- */
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-
-static int sock_no_open(struct inode *irrelevant, struct file *dontcare)
-{
-        return -ENXIO;
-}
-
-const struct file_operations bad_sock_fops = {
-        .owner = THIS_MODULE,
-        .open = sock_no_open,
-        .llseek = noop_llseek,
-};
diff --git a/net/socket.c b/net/socket.c
index 8809afccf7fa..70bbde65e4ca 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -113,7 +113,6 @@ unsigned int sysctl_net_busy_read __read_mostly;
 unsigned int sysctl_net_busy_poll __read_mostly;
 #endif
 
-static int sock_no_open(struct inode *irrelevant, struct file *dontcare);
 static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
                          unsigned long nr_segs, loff_t pos);
 static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
@@ -151,7 +150,6 @@ static const struct file_operations socket_file_ops = {
         .compat_ioctl = compat_sock_ioctl,
 #endif
         .mmap =         sock_mmap,
-        .open =         sock_no_open,   /* special open code to disallow open via /proc */
         .release =      sock_close,
         .fasync =       sock_fasync,
         .sendpage =     sock_sendpage,
@@ -559,23 +557,6 @@ static struct socket *sock_alloc(void)
         return sock;
 }
 
-/*
- *      In theory you can't get an open on this inode, but /proc provides
- *      a back door. Remember to keep it shut otherwise you'll let the
- *      creepy crawlies in.
- */
-
-static int sock_no_open(struct inode *irrelevant, struct file *dontcare)
-{
-        return -ENXIO;
-}
-
-const struct file_operations bad_sock_fops = {
-        .owner = THIS_MODULE,
-        .open = sock_no_open,
-        .llseek = noop_llseek,
-};
-
 /**
  *      sock_release    -       close a socket
  *      @sock: socket to close