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readdisklabel(): fabricate sane default disklabel in case there isn't 

any on the disk
Implemented by Christian Limpach, sent in port-next68k/16929.
This commit is contained in:
jdolecek 2002-05-20 20:49:16 +00:00
parent f02ecb7d7a
commit 9caf54f80a
1 changed files with 13 additions and 5 deletions
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18
sys/arch/next68k/next68k/disksubr.c
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@ -1,4 +1,4 @@
/* $NetBSD: disksubr.c,v 1.7 2002/03/05 09:40:41 simonb Exp $ */
/* $NetBSD: disksubr.c,v 1.8 2002/05/20 20:49:16 jdolecek Exp $ */
/*
* Copyright (c) 1982, 1986, 1988, 1993
@ -67,13 +67,21 @@ readdisklabel(dev, strat, lp, osdep)
struct buf *bp;
struct disklabel *dlp;
char *msg = NULL;
int i;
/* minimal requirements for archtypal disk label */
if (lp->d_secsize == 0)
lp->d_secsize = DEV_BSIZE;
if (lp->d_secperunit == 0)
lp->d_secperunit = 0x1fffffff;
lp->d_npartitions = 1;
if (lp->d_partitions[0].p_size == 0)
lp->d_partitions[0].p_size = 0x1fffffff;
lp->d_partitions[0].p_offset = 0;
lp->d_npartitions = RAW_PART + 1;
for (i = 0; i < RAW_PART; i++) {
lp->d_partitions[i].p_size = 0;
lp->d_partitions[i].p_offset = 0;
}
if (lp->d_partitions[i].p_size == 0)
lp->d_partitions[i].p_size = 0x1fffffff;
lp->d_partitions[i].p_offset = 0;
bp = geteblk((int)lp->d_secsize);
bp->b_dev = dev;