fs/btrfs/tests/btrfs-tests.c

   1 /*
   2  * Copyright (C) 2013 Fusion IO.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public
   6  * License v2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public
  14  * License along with this program; if not, write to the
  15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  16  * Boston, MA 021110-1307, USA.
  17  */
  18
  19 #include <linux/fs.h>
  20 #include <linux/mount.h>
  21 #include <linux/magic.h>
  22 #include "btrfs-tests.h"
  23 #include "../ctree.h"
  24
  25 static struct vfsmount *test_mnt = NULL;
  26
  27 static const struct super_operations btrfs_test_super_ops = {
  28         .alloc_inode    = btrfs_alloc_inode,
  29         .destroy_inode  = btrfs_test_destroy_inode,
  30 };
  31
  32 static struct dentry *btrfs_test_mount(struct file_system_type *fs_type,
  33                                        int flags, const char *dev_name,
  34                                        void *data)
  35 {
  36         return mount_pseudo(fs_type, "btrfs_test:", &btrfs_test_super_ops,
  37                             NULL, BTRFS_TEST_MAGIC);
  38 }
  39
  40 static struct file_system_type test_type = {
  41         .name           = "btrfs_test_fs",
  42         .mount          = btrfs_test_mount,
  43         .kill_sb        = kill_anon_super,
  44 };
  45
  46 struct inode *btrfs_new_test_inode(void)
  47 {
  48         return new_inode(test_mnt->mnt_sb);
  49 }
  50
  51 int btrfs_init_test_fs(void)
  52 {
  53         int ret;
  54
  55         ret = register_filesystem(&test_type);
  56         if (ret) {
  57                 printk(KERN_ERR "btrfs: cannot register test file system\n");
  58                 return ret;
  59         }
  60
  61         test_mnt = kern_mount(&test_type);
  62         if (IS_ERR(test_mnt)) {
  63                 printk(KERN_ERR "btrfs: cannot mount test file system\n");
  64                 unregister_filesystem(&test_type);
  65                 return ret;
  66         }
  67         return 0;
  68 }
  69
  70 void btrfs_destroy_test_fs(void)
  71 {
  72         kern_unmount(test_mnt);
  73         unregister_filesystem(&test_type);
  74 }