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70 lines
2.8 KiB
C
70 lines
2.8 KiB
C
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/*-
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* Copyright (c) 2009-2010 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Pawel Jakub Dawidek under sponsorship from
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* the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _ACTIVEMAP_H_
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#define _ACTIVEMAP_H_
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#include <stdbool.h>
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#include <stdint.h>
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struct activemap;
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int activemap_init(struct activemap **ampp, uint64_t mediasize,
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uint32_t extentsize, uint32_t sectorsize, uint32_t keepdirty);
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void activemap_free(struct activemap *amp);
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bool activemap_write_start(struct activemap *amp, off_t offset, off_t length);
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bool activemap_write_complete(struct activemap *amp, off_t offset,
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off_t length);
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bool activemap_extent_complete(struct activemap *amp, int extent);
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uint64_t activemap_ndirty(const struct activemap *amp);
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bool activemap_differ(const struct activemap *amp);
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size_t activemap_size(const struct activemap *amp);
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size_t activemap_ondisk_size(const struct activemap *amp);
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void activemap_copyin(struct activemap *amp, const unsigned char *buf,
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size_t size);
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void activemap_merge(struct activemap *amp, const unsigned char *buf,
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size_t size);
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const unsigned char *activemap_bitmap(struct activemap *amp, size_t *sizep);
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size_t activemap_calc_ondisk_size(uint64_t mediasize, uint32_t extentsize,
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uint32_t sectorsize);
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void activemap_sync_rewind(struct activemap *amp);
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off_t activemap_sync_offset(struct activemap *amp, off_t *lengthp,
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int *syncextp);
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bool activemap_need_sync(struct activemap *amp, off_t offset, off_t length);
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void activemap_dump(const struct activemap *amp);
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#endif /* !_ACTIVEMAP_H_ */
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