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 27 /* CLOOP format and related constants */ 28 29 /* 30 * Integer values (block size, number of blocks, offsets) 31 * are stored in big-endian (network) order on disk. 32 */ 33 34 #define CLOOP_MAGIC_LEN 128 35 #define CLOOP_OFS_COMPR 0x0b 36 #define CLOOP_OFS_VERSN (CLOOP_OFS_COMPR + 1) 37 38 #define CLOOP_MAJVER_2 '2' 39 #define CLOOP_MAJVER_3 '3' 40 #define CLOOP_MAJVER_4 '4' 41 42 #define CLOOP_COMP_LIBZ 'V' 43 #define CLOOP_COMP_LZMA 'L' 44 #define CLOOP_COMP_ZSTD 'Z' 45 46 struct cloop_header { 47 char magic[CLOOP_MAGIC_LEN]; /* cloop magic */ 48 uint32_t blksz; /* block size */ 49 uint32_t nblocks; /* number of blocks */ 50 }; 51