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      1 /*	$NetBSD: vtoc.c,v 1.4 2008/04/28 20:23:18 martin Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2004 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by UCHIYAMA Yasushi.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: vtoc.c,v 1.4 2008/04/28 20:23:18 martin Exp $");
     34 
     35 #include <sys/types.h>
     36 #include <sys/systm.h>
     37 
     38 #if !defined(_KERNEL) && defined(_STANDALONE)
     39 #include <lib/libsa/stand.h>
     40 #include <lib/libkern/libkern.h>
     41 #endif
     42 
     43 #ifdef VTOC_DEBUG
     44 #define	DPRINTF(fmt, args...)	printf(fmt, ##args)
     45 #else
     46 #define	DPRINTF(arg...)		((void)0)
     47 #endif
     48 
     49 #include <machine/sector.h>
     50 #include <machine/vtoc.h>
     51 
     52 #ifdef VTOC_DEBUG
     53 void vtoc_print_partition_table(const struct ux_partition *);
     54 #endif /* VTOC_DEBUG */
     55 
     56 bool
     57 vtoc_sector(void *rwops, struct vtoc_sector *vtoc, int start)
     58 {
     59 
     60 	if (!sector_read(rwops, (void *)vtoc, start + VTOC_SECTOR))
     61 		return false;
     62 
     63 	if (!vtoc_sanity(vtoc))
     64 		return false;
     65 
     66 	return true;
     67 }
     68 
     69 const struct ux_partition *
     70 vtoc_find_bfs(const struct vtoc_sector *vtoc)
     71 {
     72 	int i;
     73 
     74 	if (!vtoc_valid(vtoc)) {
     75 		printf("invalid VTOC\n");
     76 		return 0;
     77 	}
     78 
     79 	for (i = 0; i < vtoc->npartitions; i++)
     80 		if (vtoc->partition[i].tag == VTOC_TAG_STAND)
     81 			break;
     82 
     83 	if (i == vtoc->npartitions) {
     84 		printf("no bfs partition found.\n");
     85 		return 0;
     86 	}
     87 
     88 	return &vtoc->partition[i];
     89 }
     90 
     91 bool
     92 vtoc_valid(const struct vtoc_sector *vtoc)
     93 {
     94 
     95 	return (vtoc->magic == VTOC_MAGIC) && (vtoc->version == VTOC_VERSION);
     96 }
     97 
     98 bool
     99 vtoc_sanity(const struct vtoc_sector *vtoc)
    100 {
    101 
    102 	if (!vtoc_valid(vtoc)) {
    103 		DPRINTF("Invalid VTOC.\n");
    104 		return false;
    105 	}
    106 
    107 	DPRINTF("[VTOC] (%d byte)\n", sizeof *vtoc);
    108 	DPRINTF("Bootinfo = %08x %08x %08x\n",
    109 	    vtoc->bootinfo[0], vtoc->bootinfo[1], vtoc->bootinfo[2]);
    110 	DPRINTF("Magic = %08x\n", vtoc->magic);
    111 	DPRINTF("Version = %d\n", vtoc->version);
    112 	DPRINTF("Volume = %s\n", vtoc->volume);
    113 	DPRINTF("Sector size = %d\n", vtoc->sector_size_byte);
    114 	DPRINTF("# of partitions = %d\n", vtoc->npartitions);
    115 #ifdef VTOC_DEBUG
    116 	vtoc_print_partition_table(vtoc->partition);
    117 #endif
    118 	return true;
    119 }
    120 
    121 #ifdef VTOC_DEBUG
    122 void
    123 vtoc_print_partition_table(const struct ux_partition *p)
    124 {
    125 	int i;
    126 
    127 	DPRINTF(" Partition Tag  Flags      Start        Count        Last\n");
    128 	for (i = 0; i < 16; i++, p++) {
    129 		DPRINTF("     %x      %d    %02x     %8d     %8d    %8d\n",
    130 		    i, p->tag, p->flags, p->start_sector, p->nsectors,
    131 		    p->start_sector + p->nsectors - 1);
    132 	}
    133 }
    134 #endif /* VTOC_DEBUG */
    135