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 23 struct logical_volume; 24 struct volume_group; 25 struct cmd_context; 26 struct dev_manager; 27 struct dm_info; 28 struct device; 29 30 /* 31 * Constructor and destructor. 32 */ 33 struct dev_manager *dev_manager_create(struct cmd_context *cmd, 34 const char *vg_name); 35 void dev_manager_destroy(struct dev_manager *dm); 36 void dev_manager_release(void); 37 void 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 */ 45 int 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); 49 int dev_manager_snapshot_percent(struct dev_manager *dm, 50 const struct logical_volume *lv, 51 float *percent, 52 percent_range_t *percent_range); 53 int 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); 57 int dev_manager_suspend(struct dev_manager *dm, struct logical_volume *lv, 58 int lockfs, int flush_required); 59 int dev_manager_activate(struct dev_manager *dm, struct logical_volume *lv); 60 int dev_manager_preload(struct dev_manager *dm, struct logical_volume *lv, 61 int *flush_required); 62 int dev_manager_deactivate(struct dev_manager *dm, struct logical_volume *lv); 63 64 int dev_manager_lv_mknodes(const struct logical_volume *lv); 65 int dev_manager_lv_rmnodes(const struct logical_volume *lv); 66 67 /* 68 * Put the desired changes into effect. 69 */ 70 int dev_manager_execute(struct dev_manager *dm); 71 72 int dev_manager_device_uses_vg(struct device *dev, 73 struct volume_group *vg); 74 75 #endif 76