1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009-2010 The FreeBSD Foundation 5 * All rights reserved. 6 * 7 * This software was developed by Pawel Jakub Dawidek under sponsorship from 8 * the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD$ 32 */ 33 34 #ifndef _ACTIVEMAP_H_ 35 #define _ACTIVEMAP_H_ 36 37 #include <stdbool.h> 38 #include <stdint.h> 39 40 struct activemap; 41 42 int activemap_init(struct activemap **ampp, uint64_t mediasize, 43 uint32_t extentsize, uint32_t sectorsize, uint32_t keepdirty); 44 void activemap_free(struct activemap *amp); 45 46 bool activemap_write_start(struct activemap *amp, off_t offset, off_t length); 47 bool activemap_write_complete(struct activemap *amp, off_t offset, 48 off_t length); 49 bool activemap_extent_complete(struct activemap *amp, int extent); 50 uint64_t activemap_ndirty(const struct activemap *amp); 51 52 bool activemap_differ(const struct activemap *amp); 53 size_t activemap_size(const struct activemap *amp); 54 size_t activemap_ondisk_size(const struct activemap *amp); 55 void activemap_copyin(struct activemap *amp, const unsigned char *buf, 56 size_t size); 57 void activemap_merge(struct activemap *amp, const unsigned char *buf, 58 size_t size); 59 const unsigned char *activemap_bitmap(struct activemap *amp, size_t *sizep); 60 61 size_t activemap_calc_ondisk_size(uint64_t mediasize, uint32_t extentsize, 62 uint32_t sectorsize); 63 64 void activemap_sync_rewind(struct activemap *amp); 65 off_t activemap_sync_offset(struct activemap *amp, off_t *lengthp, 66 int *syncextp); 67 bool activemap_need_sync(struct activemap *amp, off_t offset, off_t length); 68 69 void activemap_dump(const struct activemap *amp); 70 71 #endif /* !_ACTIVEMAP_H_ */ 72