1263409Smarcel/*- 2263409Smarcel * Copyright (c) 2014 Juniper Networks, Inc. 3263409Smarcel * All rights reserved. 4263409Smarcel * 5263409Smarcel * Redistribution and use in source and binary forms, with or without 6263409Smarcel * modification, are permitted provided that the following conditions 7263409Smarcel * are met: 8263409Smarcel * 1. Redistributions of source code must retain the above copyright 9263409Smarcel * notice, this list of conditions and the following disclaimer. 10263409Smarcel * 2. Redistributions in binary form must reproduce the above copyright 11263409Smarcel * notice, this list of conditions and the following disclaimer in the 12263409Smarcel * documentation and/or other materials provided with the distribution. 13263409Smarcel * 14263409Smarcel * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15263409Smarcel * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16263409Smarcel * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17263409Smarcel * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18263409Smarcel * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19263409Smarcel * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20263409Smarcel * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21263409Smarcel * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22263409Smarcel * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23263409Smarcel * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24263409Smarcel * SUCH DAMAGE. 25263409Smarcel */ 26263409Smarcel 27263409Smarcel#include <sys/cdefs.h> 28263409Smarcel__FBSDID("$FreeBSD$"); 29263409Smarcel 30263409Smarcel#include <sys/types.h> 31263409Smarcel#include <sys/diskmbr.h> 32263652Smarcel#include <sys/endian.h> 33263442Smarcel#include <sys/errno.h> 34263409Smarcel#include <stdlib.h> 35263652Smarcel#include <string.h> 36263652Smarcel#include <unistd.h> 37263409Smarcel 38268161Smarcel#include "image.h" 39263409Smarcel#include "mkimg.h" 40263409Smarcel#include "scheme.h" 41263409Smarcel 42268161Smarcel#ifndef DOSPTYP_FAT32 43268161Smarcel#define DOSPTYP_FAT32 0x0b 44268161Smarcel#endif 45268161Smarcel 46263409Smarcelstatic struct mkimg_alias mbr_aliases[] = { 47263673Smarcel { ALIAS_EBR, ALIAS_INT2TYPE(DOSPTYP_EXT) }, 48263673Smarcel { ALIAS_FAT32, ALIAS_INT2TYPE(DOSPTYP_FAT32) }, 49263652Smarcel { ALIAS_FREEBSD, ALIAS_INT2TYPE(DOSPTYP_386BSD) }, 50263652Smarcel { ALIAS_NONE, 0 } /* Keep last! */ 51263409Smarcel}; 52263409Smarcel 53272030Smarcelstatic lba_t 54272030Smarcelmbr_metadata(u_int where, lba_t blk) 55263409Smarcel{ 56263409Smarcel 57272030Smarcel blk += (where == SCHEME_META_IMG_START) ? 1 : 0; 58272030Smarcel return (round_track(blk)); 59263409Smarcel} 60263409Smarcel 61263706Smarcelstatic void 62263706Smarcelmbr_chs(u_char *cyl, u_char *hd, u_char *sec, uint32_t lba __unused) 63263706Smarcel{ 64263706Smarcel 65263706Smarcel *cyl = 0xff; /* XXX */ 66263706Smarcel *hd = 0xff; /* XXX */ 67263706Smarcel *sec = 0xff; /* XXX */ 68263706Smarcel} 69263706Smarcel 70263442Smarcelstatic int 71268161Smarcelmbr_write(lba_t imgsz __unused, void *bootcode) 72263442Smarcel{ 73263652Smarcel u_char *mbr; 74263652Smarcel struct dos_partition *dpbase, *dp; 75263652Smarcel struct part *part; 76263653Smarcel int error; 77263652Smarcel 78263652Smarcel mbr = malloc(secsz); 79263652Smarcel if (mbr == NULL) 80263652Smarcel return (ENOMEM); 81263652Smarcel if (bootcode != NULL) { 82263652Smarcel memcpy(mbr, bootcode, DOSPARTOFF); 83263652Smarcel memset(mbr + DOSPARTOFF, 0, secsz - DOSPARTOFF); 84263652Smarcel } else 85263652Smarcel memset(mbr, 0, secsz); 86263654Smarcel le16enc(mbr + DOSMAGICOFFSET, DOSMAGIC); 87263652Smarcel dpbase = (void *)(mbr + DOSPARTOFF); 88263652Smarcel STAILQ_FOREACH(part, &partlist, link) { 89263652Smarcel dp = dpbase + part->index; 90263652Smarcel dp->dp_flag = (part->index == 0 && bootcode != NULL) ? 0x80 : 0; 91263706Smarcel mbr_chs(&dp->dp_scyl, &dp->dp_shd, &dp->dp_ssect, 92263706Smarcel part->block); 93263652Smarcel dp->dp_typ = ALIAS_TYPE2INT(part->type); 94263706Smarcel mbr_chs(&dp->dp_ecyl, &dp->dp_ehd, &dp->dp_esect, 95263706Smarcel part->block + part->size - 1); 96263841Smarcel le32enc(&dp->dp_start, part->block); 97263841Smarcel le32enc(&dp->dp_size, part->size); 98263652Smarcel } 99268161Smarcel error = image_write(0, mbr, 1); 100263652Smarcel free(mbr); 101263653Smarcel return (error); 102263442Smarcel} 103263442Smarcel 104263409Smarcelstatic struct mkimg_scheme mbr_scheme = { 105263409Smarcel .name = "mbr", 106263409Smarcel .description = "Master Boot Record", 107263409Smarcel .aliases = mbr_aliases, 108263440Smarcel .metadata = mbr_metadata, 109263442Smarcel .write = mbr_write, 110263652Smarcel .bootcode = 512, 111263700Smarcel .nparts = NDOSPART, 112263700Smarcel .maxsecsz = 4096 113263409Smarcel}; 114263409Smarcel 115263409SmarcelSCHEME_DEFINE(mbr_scheme); 116