2 * Copyright (C) 2002-2004 Sistina Software, Inc. All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5 * This file is part of LVM2.
7 * This copyrighted material is made available to anyone wishing to use,
8 * modify, copy, or redistribute it subject to the terms and conditions
9 * of the GNU Lesser General Public License v.2.1.
11 * You should have received a copy of the GNU Lesser General Public License
12 * along with this program; if not, write to the Free Software Foundation,
13 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 #ifndef _LVM_DEV_MANAGER_H
17 #define _LVM_DEV_MANAGER_H
19 #include "metadata-exported.h"
21 struct logical_volume;
29 * Constructor and destructor.
31 struct dev_manager *dev_manager_create(struct cmd_context *cmd,
33 void dev_manager_destroy(struct dev_manager *dm);
34 void dev_manager_release(void);
35 void dev_manager_exit(void);
38 * The device handler is responsible for creating all the layered
39 * dm devices, and ensuring that all constraints are maintained
40 * (eg, an origin is created before its snapshot, but is not
41 * unsuspended until the snapshot is also created.)
43 int dev_manager_info(struct dm_pool *mem, const struct logical_volume *lv,
45 int with_open_count, int with_read_ahead,
46 struct dm_info *info, uint32_t *read_ahead);
47 int dev_manager_snapshot_percent(struct dev_manager *dm,
48 const struct logical_volume *lv,
50 int dev_manager_mirror_percent(struct dev_manager *dm,
51 const struct logical_volume *lv, int wait,
52 percent_t *percent, uint32_t *event_nr);
53 int dev_manager_suspend(struct dev_manager *dm, struct logical_volume *lv,
54 unsigned origin_only, int lockfs, int flush_required);
55 int dev_manager_activate(struct dev_manager *dm, struct logical_volume *lv, unsigned origin_only);
56 int dev_manager_preload(struct dev_manager *dm, struct logical_volume *lv,
57 unsigned origin_only, int *flush_required);
58 int dev_manager_deactivate(struct dev_manager *dm, struct logical_volume *lv);
59 int dev_manager_transient(struct dev_manager *dm, struct logical_volume *lv) __attribute__((nonnull(1, 2)));
61 int dev_manager_mknodes(const struct logical_volume *lv);
64 * Put the desired changes into effect.
66 int dev_manager_execute(struct dev_manager *dm);
68 int dev_manager_device_uses_vg(struct device *dev,
69 struct volume_group *vg);