NFS: Create an init_nfs_v4() function

I want to initialize all of NFS v4 in a single function that will
eventually be used as the v4 module init function.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

4 files changed, 65 insertions, 31 deletions

diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile
index 7ddd45d9f170..162a699134ca 100644
--- a/fs/nfs/Makefile
+++ b/fs/nfs/Makefile
@@ -13,7 +13,7 @@ nfs-$(CONFIG_NFS_V2)	+= proc.o nfs2xdr.o
 nfs-$(CONFIG_NFS_V3)    += nfs3proc.o nfs3xdr.o
 nfs-$(CONFIG_NFS_V3_ACL)        += nfs3acl.o
 nfs-$(CONFIG_NFS_V4)    += nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o \
-                           delegation.o idmap.o \
+                           nfs4super.o delegation.o idmap.o \
                            callback.o callback_xdr.o callback_proc.o \
                            nfs4namespace.o
 nfs-$(CONFIG_NFS_V4_1)  += pnfs.o pnfs_dev.o
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 28c9ebbe78a6..35f7e4bc680e 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -32,7 +32,6 @@
 #include <linux/lockd/bind.h>
 #include <linux/seq_file.h>
 #include <linux/mount.h>
-#include <linux/nfs_idmap.h>
 #include <linux/vfs.h>
 #include <linux/inet.h>
 #include <linux/nfs_xdr.h>
@@ -1628,87 +1627,96 @@ static int __init init_nfs_fs(void)
 {
         int err;
 
-        err = nfs_idmap_init();
-        if (err < 0)
-                goto out10;
-
         err = nfs_dns_resolver_init();
         if (err < 0)
-                goto out9;
+                goto out11;
 
         err = register_pernet_subsys(&nfs_net_ops);
         if (err < 0)
-                goto out8;
+                goto out10;
 
         err = nfs_fscache_register();
         if (err < 0)
-                goto out7;
+                goto out9;
 
         err = nfsiod_start();
         if (err)
-                goto out6;
+                goto out8;
 
         err = nfs_fs_proc_init();
         if (err)
-                goto out5;
+                goto out7;
 
         err = nfs_init_nfspagecache();
         if (err)
-                goto out4;
+                goto out6;
 
         err = nfs_init_inodecache();
         if (err)
-                goto out3;
+                goto out5;
 
         err = nfs_init_readpagecache();
         if (err)
-                goto out2;
+                goto out4;
 
         err = nfs_init_writepagecache();
         if (err)
-                goto out1;
+                goto out3;
 
         err = nfs_init_directcache();
         if (err)
-                goto out0;
+                goto out2;
 
 #ifdef CONFIG_PROC_FS
         rpc_proc_register(&init_net, &nfs_rpcstat);
 #endif
+
+#ifdef CONFIG_NFS_V4
+        err = init_nfs_v4();
+        if (err)
+                goto out1;
+#endif
+
         if ((err = register_nfs_fs()) != 0)
-                goto out;
+                goto out0;
+
         return 0;
-out:
+out0:
+#ifdef CONFIG_NFS_V4
+        exit_nfs_v4();
+out1:
+#endif
 #ifdef CONFIG_PROC_FS
         rpc_proc_unregister(&init_net, "nfs");
 #endif
         nfs_destroy_directcache();
-out0:
-        nfs_destroy_writepagecache();
-out1:
-        nfs_destroy_readpagecache();
 out2:
-        nfs_destroy_inodecache();
+        nfs_destroy_writepagecache();
 out3:
-        nfs_destroy_nfspagecache();
+        nfs_destroy_readpagecache();
 out4:
-        nfs_fs_proc_exit();
+        nfs_destroy_inodecache();
 out5:
-        nfsiod_stop();
+        nfs_destroy_nfspagecache();
 out6:
-        nfs_fscache_unregister();
+        nfs_fs_proc_exit();
 out7:
-        unregister_pernet_subsys(&nfs_net_ops);
+        nfsiod_stop();
 out8:
-        nfs_dns_resolver_destroy();
+        nfs_fscache_unregister();
 out9:
-        nfs_idmap_quit();
+        unregister_pernet_subsys(&nfs_net_ops);
 out10:
+        nfs_dns_resolver_destroy();
+out11:
         return err;
 }
 
 static void __exit exit_nfs_fs(void)
 {
+#ifdef CONFIG_NFS_V4
+        exit_nfs_v4();
+#endif
         nfs_destroy_directcache();
         nfs_destroy_writepagecache();
         nfs_destroy_readpagecache();
@@ -1717,7 +1725,6 @@ static void __exit exit_nfs_fs(void)
         nfs_fscache_unregister();
         unregister_pernet_subsys(&nfs_net_ops);
         nfs_dns_resolver_destroy();
-        nfs_idmap_quit();
 #ifdef CONFIG_PROC_FS
         rpc_proc_unregister(&init_net, "nfs");
 #endif
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index e2c4c72d3866..1a6ed3f9a32a 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -364,6 +364,10 @@ extern void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_sta
 
 extern const nfs4_stateid zero_stateid;
 
+/* nfs4super.c */
+int init_nfs_v4(void);
+void exit_nfs_v4(void);
+
 /* nfs4xdr.c */
 extern struct rpc_procinfo nfs4_procedures[];
 
diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c
new file mode 100644
index 000000000000..366e41459695
--- /dev/null
+++ b/fs/nfs/nfs4super.c
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2012 Bryan Schumaker <bjschuma@netapp.com>
+ */
+#include <linux/init.h>
+#include <linux/nfs_idmap.h>
+
+int __init init_nfs_v4(void)
+{
+        int err;
+
+        err = nfs_idmap_init();
+        if (err)
+                goto out;
+
+        return 0;
+out:
+        return err;
+}
+
+void __exit exit_nfs_v4(void)
+{
+        nfs_idmap_quit();
+}