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 * $FreeBSD$ 30 */ 31 32 #ifndef _ACTIVEMAP_H_ 33 #define _ACTIVEMAP_H_ 34 35 #include <stdbool.h> 36 #include <stdint.h> 37 38 struct activemap; 39 40 int activemap_init(struct activemap **ampp, uint64_t mediasize, 41 uint32_t extentsize, uint32_t sectorsize, uint32_t keepdirty); 42 void activemap_free(struct activemap *amp); 43 44 bool activemap_write_start(struct activemap *amp, off_t offset, off_t length); 45 bool activemap_write_complete(struct activemap *amp, off_t offset, 46 off_t length); 47 bool activemap_extent_complete(struct activemap *amp, int extent); 48 uint64_t activemap_ndirty(const struct activemap *amp); 49 50 bool activemap_differ(const struct activemap *amp); 51 size_t activemap_size(const struct activemap *amp); 52 size_t activemap_ondisk_size(const struct activemap *amp); 53 void activemap_copyin(struct activemap *amp, const unsigned char *buf, 54 size_t size); 55 void activemap_merge(struct activemap *amp, const unsigned char *buf, 56 size_t size); 57 const unsigned char *activemap_bitmap(struct activemap *amp, size_t *sizep); 58 59 size_t activemap_calc_ondisk_size(uint64_t mediasize, uint32_t extentsize, 60 uint32_t sectorsize); 61 62 void activemap_sync_rewind(struct activemap *amp); 63 off_t activemap_sync_offset(struct activemap *amp, off_t *lengthp, 64 int *syncextp); 65 bool activemap_need_sync(struct activemap *amp, off_t offset, off_t length); 66 67 void activemap_dump(const struct activemap *amp); 68 69 #endif /* !_ACTIVEMAP_H_ */ 70