vfs: Convert btrfs_test to use the new mount API

Convert the btrfs_test filesystem to the new internal mount API as the old
one will be obsoleted and removed.  This allows greater flexibility in
communication of mount parameters between userspace, the VFS and the
filesystem.

See Documentation/filesystems/mount_api.txt for more information.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: David Sterba <dsterba@suse.com>
cc: Chris Mason <clm@fb.com>
cc: Josef Bacik <josef@toxicpanda.com>
cc: linux-btrfs@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/btrfs/tests/btrfs-tests.c b/fs/btrfs/tests/btrfs-tests.c
index 6da54323eaf8124116193fc558eab72daaed3c56..1e3ba4949399536929b2d6a951d04aec69357fb5 100644 (file)
--- a/fs/btrfs/tests/btrfs-tests.c
+++ b/fs/btrfs/tests/btrfs-tests.c
@@ -5,6 +5,7 @@
 
 #include <linux/fs.h>
 #include <linux/mount.h>
+#include <linux/pseudo_fs.h>
 #include <linux/magic.h>
 #include "btrfs-tests.h"
 #include "../ctree.h"
@@ -32,17 +33,19 @@ static const struct super_operations btrfs_test_super_ops = {
        .destroy_inode  = btrfs_test_destroy_inode,
 };
 
-static struct dentry *btrfs_test_mount(struct file_system_type *fs_type,
-                                      int flags, const char *dev_name,
-                                      void *data)
+
+static int btrfs_test_init_fs_context(struct fs_context *fc)
 {
-       return mount_pseudo(fs_type, &btrfs_test_super_ops,
-                           NULL, BTRFS_TEST_MAGIC);
+       struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC);
+       if (!ctx)
+               return -ENOMEM;
+       ctx->ops = &btrfs_test_super_ops;
+       return 0;
 }
 
 static struct file_system_type test_type = {
        .name           = "btrfs_test_fs",
-       .mount          = btrfs_test_mount,
+       .init_fs_context = btrfs_test_init_fs_context,
        .kill_sb        = kill_anon_super,
 };