Merge commit 'kumar/kumar-next' into next
[linux-2.6] / drivers / md / dm-exception-store.c
1 /*
2  * Copyright (C) 2001-2002 Sistina Software (UK) Limited.
3  * Copyright (C) 2006-2008 Red Hat GmbH
4  *
5  * This file is released under the GPL.
6  */
7
8 #include "dm-exception-store.h"
9
10 #include <linux/mm.h>
11 #include <linux/pagemap.h>
12 #include <linux/vmalloc.h>
13 #include <linux/slab.h>
14
15 #define DM_MSG_PREFIX "snapshot exception stores"
16
17 int dm_exception_store_init(void)
18 {
19         int r;
20
21         r = dm_transient_snapshot_init();
22         if (r) {
23                 DMERR("Unable to register transient exception store type.");
24                 goto transient_fail;
25         }
26
27         r = dm_persistent_snapshot_init();
28         if (r) {
29                 DMERR("Unable to register persistent exception store type");
30                 goto persistent_fail;
31         }
32
33         return 0;
34
35 persistent_fail:
36         dm_persistent_snapshot_exit();
37 transient_fail:
38         return r;
39 }
40
41 void dm_exception_store_exit(void)
42 {
43         dm_persistent_snapshot_exit();
44         dm_transient_snapshot_exit();
45 }