activemap.h revision 267654 
1/*-
2 * Copyright (c) 2009-2010 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Pawel Jakub Dawidek under sponsorship from
6 * the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: releng/9.3/sbin/hastd/activemap.h 204076 2010-02-18 23:16:19Z pjd $
30 */
31
32#ifndef	_ACTIVEMAP_H_
33#define	_ACTIVEMAP_H_
34
35#include <stdbool.h>
36#include <stdint.h>
37
38struct activemap;
39
40int activemap_init(struct activemap **ampp, uint64_t mediasize,
41    uint32_t extentsize, uint32_t sectorsize, uint32_t keepdirty);
42void activemap_free(struct activemap *amp);
43
44bool activemap_write_start(struct activemap *amp, off_t offset, off_t length);
45bool activemap_write_complete(struct activemap *amp, off_t offset,
46    off_t length);
47bool activemap_extent_complete(struct activemap *amp, int extent);
48uint64_t activemap_ndirty(const struct activemap *amp);
49
50bool activemap_differ(const struct activemap *amp);
51size_t activemap_size(const struct activemap *amp);
52size_t activemap_ondisk_size(const struct activemap *amp);
53void activemap_copyin(struct activemap *amp, const unsigned char *buf,
54    size_t size);
55void activemap_merge(struct activemap *amp, const unsigned char *buf,
56    size_t size);
57const unsigned char *activemap_bitmap(struct activemap *amp, size_t *sizep);
58
59size_t activemap_calc_ondisk_size(uint64_t mediasize, uint32_t extentsize,
60    uint32_t sectorsize);
61
62void activemap_sync_rewind(struct activemap *amp);
63off_t activemap_sync_offset(struct activemap *amp, off_t *lengthp,
64    int *syncextp);
65bool activemap_need_sync(struct activemap *amp, off_t offset, off_t length);
66
67void activemap_dump(const struct activemap *amp);
68
69#endif	/* !_ACTIVEMAP_H_ */
70