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