1 /* 2 * Copyright (c) 2004-2016 Maxim Sobolev <sobomax@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 /* CLOOP format and related constants */ 30 31 /* 32 * Integer values (block size, number of blocks, offsets) 33 * are stored in big-endian (network) order on disk. 34 */ 35 36 #define CLOOP_MAGIC_LEN 128 37 #define CLOOP_OFS_COMPR 0x0b 38 #define CLOOP_OFS_VERSN (CLOOP_OFS_COMPR + 1) 39 40 #define CLOOP_MAJVER_2 '2' 41 #define CLOOP_MAJVER_3 '3' 42 #define CLOOP_MAJVER_4 '4' 43 44 #define CLOOP_COMP_LIBZ 'V' 45 #define CLOOP_COMP_LIBZ_DDP 'v' 46 #define CLOOP_COMP_LZMA 'L' 47 #define CLOOP_COMP_LZMA_DDP 'l' 48 #define CLOOP_COMP_ZSTD 'Z' 49 #define CLOOP_COMP_ZSTD_DDP 'z' 50 51 #define CLOOP_MINVER_LZMA CLOOP_MAJVER_3 52 #define CLOOP_MINVER_ZLIB CLOOP_MAJVER_2 53 #define CLOOP_MINVER_ZSTD CLOOP_MAJVER_4 54 55 #define CLOOP_MINVER_RELIABLE_LASTBLKSZ CLOOP_MAJVER_4 56 57 struct cloop_header { 58 char magic[CLOOP_MAGIC_LEN]; /* cloop magic */ 59 uint32_t blksz; /* block size */ 60 uint32_t nblocks; /* number of blocks */ 61 }; 62