1/*	$NetBSD: dev_manager.h,v 1.1.1.2 2009/12/02 00:26:22 haad Exp $	*/
2
3/*
4 * Copyright (C) 2002-2004 Sistina Software, Inc. All rights reserved.
5 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
6 *
7 * This file is part of LVM2.
8 *
9 * This copyrighted material is made available to anyone wishing to use,
10 * modify, copy, or redistribute it subject to the terms and conditions
11 * of the GNU Lesser General Public License v.2.1.
12 *
13 * You should have received a copy of the GNU Lesser General Public License
14 * along with this program; if not, write to the Free Software Foundation,
15 * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
16 */
17
18#ifndef _LVM_DEV_MANAGER_H
19#define _LVM_DEV_MANAGER_H
20
21#include "metadata-exported.h"
22
23struct logical_volume;
24struct volume_group;
25struct cmd_context;
26struct dev_manager;
27struct dm_info;
28struct device;
29
30/*
31 * Constructor and destructor.
32 */
33struct dev_manager *dev_manager_create(struct cmd_context *cmd,
34				       const char *vg_name);
35void dev_manager_destroy(struct dev_manager *dm);
36void dev_manager_release(void);
37void dev_manager_exit(void);
38
39/*
40 * The device handler is responsible for creating all the layered
41 * dm devices, and ensuring that all constraints are maintained
42 * (eg, an origin is created before its snapshot, but is not
43 * unsuspended until the snapshot is also created.)
44 */
45int dev_manager_info(struct dm_pool *mem, const char *name,
46		     const struct logical_volume *lv,
47		     int mknodes, int with_open_count, int with_read_ahead,
48		     struct dm_info *info, uint32_t *read_ahead);
49int dev_manager_snapshot_percent(struct dev_manager *dm,
50				 const struct logical_volume *lv,
51				 float *percent,
52				 percent_range_t *percent_range);
53int dev_manager_mirror_percent(struct dev_manager *dm,
54			       struct logical_volume *lv, int wait,
55			       float *percent, percent_range_t *percent_range,
56			       uint32_t *event_nr);
57int dev_manager_suspend(struct dev_manager *dm, struct logical_volume *lv,
58			int lockfs, int flush_required);
59int dev_manager_activate(struct dev_manager *dm, struct logical_volume *lv);
60int dev_manager_preload(struct dev_manager *dm, struct logical_volume *lv,
61			int *flush_required);
62int dev_manager_deactivate(struct dev_manager *dm, struct logical_volume *lv);
63
64int dev_manager_lv_mknodes(const struct logical_volume *lv);
65int dev_manager_lv_rmnodes(const struct logical_volume *lv);
66
67/*
68 * Put the desired changes into effect.
69 */
70int dev_manager_execute(struct dev_manager *dm);
71
72int dev_manager_device_uses_vg(struct device *dev,
73			       struct volume_group *vg);
74
75#endif
76