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are affected by the move. (Currently it's possible for I/O to become trapped between suspended devices amongst other problems. The current fix was selected so as to minimise the testing surface. I hope eventually to replace it with a cleaner one that extends the deptree code. Some lvconvert scenarios still suffer from related problems.
73 lines
2.5 KiB
C
73 lines
2.5 KiB
C
/*
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* Copyright (C) 2002-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _LVM_DEV_MANAGER_H
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#define _LVM_DEV_MANAGER_H
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#include "metadata-exported.h"
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struct logical_volume;
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struct volume_group;
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struct cmd_context;
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struct dev_manager;
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struct dm_info;
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struct device;
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/*
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* Constructor and destructor.
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*/
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struct dev_manager *dev_manager_create(struct cmd_context *cmd,
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const char *vg_name,
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unsigned track_pvmove_deps);
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void dev_manager_destroy(struct dev_manager *dm);
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void dev_manager_release(void);
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void dev_manager_exit(void);
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/*
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* The device handler is responsible for creating all the layered
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* dm devices, and ensuring that all constraints are maintained
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* (eg, an origin is created before its snapshot, but is not
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* unsuspended until the snapshot is also created.)
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*/
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int dev_manager_info(struct dm_pool *mem, const struct logical_volume *lv,
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const char *layer,
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int with_open_count, int with_read_ahead,
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struct dm_info *info, uint32_t *read_ahead);
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int dev_manager_snapshot_percent(struct dev_manager *dm,
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const struct logical_volume *lv,
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percent_t *percent);
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int dev_manager_mirror_percent(struct dev_manager *dm,
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const struct logical_volume *lv, int wait,
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percent_t *percent, uint32_t *event_nr);
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int dev_manager_suspend(struct dev_manager *dm, struct logical_volume *lv,
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unsigned origin_only, int lockfs, int flush_required);
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int dev_manager_activate(struct dev_manager *dm, struct logical_volume *lv, unsigned origin_only);
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int dev_manager_preload(struct dev_manager *dm, struct logical_volume *lv,
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unsigned origin_only, int *flush_required);
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int dev_manager_deactivate(struct dev_manager *dm, struct logical_volume *lv);
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int dev_manager_transient(struct dev_manager *dm, struct logical_volume *lv) __attribute__((nonnull(1, 2)));
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int dev_manager_mknodes(const struct logical_volume *lv);
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/*
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* Put the desired changes into effect.
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*/
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int dev_manager_execute(struct dev_manager *dm);
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int dev_manager_device_uses_vg(struct device *dev,
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struct volume_group *vg);
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#endif
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