vtoc8.c revision 263845
1/*- 2 * Copyright (c) 2014 Juniper Networks, Inc. 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#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: user/marcel/mkimg/vtoc8.c 263845 2014-03-27 22:48:48Z marcel $"); 29 30#include <sys/types.h> 31#include <sys/endian.h> 32#include <sys/errno.h> 33#include <sys/vtoc.h> 34#include <stdio.h> 35#include <stdlib.h> 36#include <string.h> 37#include <unistd.h> 38 39#include "mkimg.h" 40#include "scheme.h" 41 42static struct mkimg_alias vtoc8_aliases[] = { 43 { ALIAS_FREEBSD_NANDFS, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_NANDFS) }, 44 { ALIAS_FREEBSD_SWAP, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_SWAP) }, 45 { ALIAS_FREEBSD_UFS, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_UFS) }, 46 { ALIAS_FREEBSD_VINUM, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_VINUM) }, 47 { ALIAS_FREEBSD_ZFS, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_NANDFS) }, 48 { ALIAS_NONE, 0 } 49}; 50 51static u_int 52vtoc8_metadata(u_int where) 53{ 54 u_int secs; 55 56 secs = (where == SCHEME_META_IMG_START) ? 1 : 0; 57 return (secs); 58} 59 60static int 61vtoc8_write(int fd, lba_t imgsz, void *bootcode __unused) 62{ 63 struct vtoc8 vtoc8; 64 struct part *part; 65 u_char *p; 66 int error; 67 uint16_t ofs, sum; 68 69 memset(&vtoc8, 0, sizeof(vtoc8)); 70 sprintf(vtoc8.ascii, "FreeBSD%lldM", (long long)(imgsz / 2048)); 71 be32enc(&vtoc8.version, VTOC_VERSION); 72 be16enc(&vtoc8.nparts, VTOC8_NPARTS); 73 be32enc(&vtoc8.sanity, VTOC_SANITY); 74 be16enc(&vtoc8.rpm, 3600); 75 be16enc(&vtoc8.physcyls, ncyls); 76 be16enc(&vtoc8.ncyls, ncyls); 77 be16enc(&vtoc8.altcyls, 0); 78 be16enc(&vtoc8.nheads, nheads); 79 be16enc(&vtoc8.nsecs, nsecs); 80 be16enc(&vtoc8.magic, VTOC_MAGIC); 81 82 ftruncate(fd, ncyls * nheads * nsecs *secsz); 83 84 STAILQ_FOREACH(part, &partlist, link) { 85 be16enc(&vtoc8.part[part->index].tag, 86 ALIAS_TYPE2INT(part->type)); 87 be32enc(&vtoc8.map[part->index].cyl, 88 part->block / (nsecs * nheads)); 89 be32enc(&vtoc8.map[part->index].nblks, 90 part->size); 91 } 92 93 /* Calculate checksum. */ 94 sum = 0; 95 p = (void *)&vtoc8; 96 for (ofs = 0; ofs < sizeof(vtoc8) - 2; ofs += 2) 97 sum ^= be16dec(p + ofs); 98 be16enc(&vtoc8.cksum, sum); 99 100 error = mkimg_seek(fd, 0); 101 if (error == 0) { 102 if (write(fd, &vtoc8, sizeof(vtoc8)) != sizeof(vtoc8)) 103 error = errno; 104 } 105 return (error); 106} 107 108static struct mkimg_scheme vtoc8_scheme = { 109 .name = "vtoc8", 110 .description = "SMI VTOC8 disk labels", 111 .aliases = vtoc8_aliases, 112 .metadata = vtoc8_metadata, 113 .write = vtoc8_write, 114 .nparts = VTOC8_NPARTS, 115 .maxsecsz = 512 116}; 117 118SCHEME_DEFINE(vtoc8_scheme); 119