1 /*- 2 * Copyright (c) 2005 Ivan Voras <ivoras@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 AUTHORS 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 AUTHORS 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 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/endian.h> 32 33 #include <geom/virstor/g_virstor_md.h> 34 #include <geom/virstor/binstream.h> 35 36 /* 37 * Encode data from g_virstor_metadata structure into a endian-independant 38 * byte stream. 39 */ 40 void 41 virstor_metadata_encode(struct g_virstor_metadata *md, unsigned char *data) 42 { 43 bin_stream_t bs; 44 45 bs_open(&bs, data); 46 47 bs_write_buf(&bs, md->md_magic, sizeof(md->md_magic)); 48 bs_write_u32(&bs, md->md_version); 49 bs_write_buf(&bs, md->md_name, sizeof(md->md_name)); 50 bs_write_u64(&bs, md->md_virsize); 51 bs_write_u32(&bs, md->md_chunk_size); 52 bs_write_u32(&bs, md->md_id); 53 bs_write_u16(&bs, md->md_count); 54 55 bs_write_buf(&bs, md->provider, sizeof(md->provider)); 56 bs_write_u16(&bs, md->no); 57 bs_write_u64(&bs, md->provsize); 58 bs_write_u32(&bs, md->chunk_count); 59 bs_write_u32(&bs, md->chunk_next); 60 bs_write_u16(&bs, md->chunk_reserved); 61 bs_write_u16(&bs, md->flags); 62 } 63 64 65 /* 66 * Decode data from endian-independant byte stream into g_virstor_metadata 67 * structure. 68 */ 69 void 70 virstor_metadata_decode(unsigned char *data, struct g_virstor_metadata *md) 71 { 72 bin_stream_t bs; 73 74 bs_open(&bs, (char *)(data)); 75 76 bs_read_buf(&bs, md->md_magic, sizeof(md->md_magic)); 77 md->md_version = bs_read_u32(&bs); 78 bs_read_buf(&bs, md->md_name, sizeof(md->md_name)); 79 md->md_virsize = bs_read_u64(&bs); 80 md->md_chunk_size = bs_read_u32(&bs); 81 md->md_id = bs_read_u32(&bs); 82 md->md_count = bs_read_u16(&bs); 83 84 bs_read_buf(&bs, md->provider, sizeof(md->provider)); 85 md->no = bs_read_u16(&bs); 86 md->provsize = bs_read_u64(&bs); 87 md->chunk_count = bs_read_u32(&bs); 88 md->chunk_next = bs_read_u32(&bs); 89 md->chunk_reserved = bs_read_u16(&bs); 90 md->flags = bs_read_u16(&bs); 91 } 92