MBR partition table support for wedges, enabled by the DKWEDGE_METHOD_MBR
option.
This commit is contained in:
thorpej
parent
f9403749b7
commit
dfc3ead10a
@ -1,4 +1,4 @@
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# $NetBSD: files,v 1.692 2004/10/14 05:12:28 yamt Exp $
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# $NetBSD: files,v 1.693 2004/10/23 17:25:14 thorpej Exp $
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# @(#)files.newconf 7.5 (Berkeley) 5/10/93
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@ -63,6 +63,7 @@ defflag opt_execfmt.h EXEC_AOUT EXEC_COFF EXEC_ECOFF EXEC_ELF32
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defflag opt_dkwedge.h DKWEDGE_AUTODISCOVER
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DKWEDGE_METHOD_BSDLABEL
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DKWEDGE_METHOD_GPT
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DKWEDGE_METHOD_MBR
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# compatibility options
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#
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@ -1150,6 +1151,7 @@ file dev/dksubr.c cgd | xbd
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file dev/dkwedge/dk.c
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file dev/dkwedge/dkwedge_bsdlabel.c dkwedge_method_bsdlabel
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file dev/dkwedge/dkwedge_gpt.c dkwedge_method_gpt
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file dev/dkwedge/dkwedge_mbr.c dkwedge_method_mbr
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file dev/fss.c fss needs-count
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file dev/md.c md needs-count
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file dev/midi.c midi | midibus needs-flag
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191
sys/dev/dkwedge/dkwedge_mbr.c
Normal file
191
sys/dev/dkwedge/dkwedge_mbr.c
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/* $NetBSD: dkwedge_mbr.c,v 1.1 2004/10/23 17:25:15 thorpej Exp $ */
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/*-
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* Copyright (c) 2004 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Master Boot Record partition table support for disk wedges
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: dkwedge_mbr.c,v 1.1 2004/10/23 17:25:15 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/errno.h>
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#include <sys/disk.h>
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#include <sys/vnode.h>
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#include <sys/malloc.h>
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#include <sys/bootblock.h>
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typedef struct mbr_args {
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struct disk *pdk;
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struct vnode *vp;
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void *buf;
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int error;
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int mbr_count;
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} mbr_args_t;
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static const char *
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mbr_ptype_to_str(uint8_t ptype)
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{
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const char *str;
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switch (ptype) {
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case MBR_PTYPE_FAT12: str = DKW_PTYPE_FAT; break;
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case MBR_PTYPE_FAT16S: str = DKW_PTYPE_FAT; break;
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case MBR_PTYPE_FAT16B: str = DKW_PTYPE_FAT; break;
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case MBR_PTYPE_NTFS: str = DKW_PTYPE_NTFS; break;
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case MBR_PTYPE_FAT32: str = DKW_PTYPE_FAT; break;
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case MBR_PTYPE_FAT32L: str = DKW_PTYPE_FAT; break;
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case MBR_PTYPE_FAT16L: str = DKW_PTYPE_FAT; break;
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case MBR_PTYPE_LNXSWAP: str = DKW_PTYPE_SWAP; break;
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case MBR_PTYPE_LNXEXT2: str = DKW_PTYPE_EXT2FS; break;
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case MBR_PTYPE_APPLEUFS:str = DKW_PTYPE_APPLEUFS; break;
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case MBR_PTYPE_EFI: str = DKW_PTYPE_FAT; break;
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default: str = NULL; break;
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}
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return (str);
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}
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static void
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getparts(mbr_args_t *a, uint32_t off, uint32_t extoff)
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{
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struct dkwedge_info dkw;
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struct mbr_partition *dp;
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struct mbr_sector *mbr;
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const char *ptype;
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int i, error;
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error = dkwedge_read(a->pdk, a->vp, off, a->buf, DEV_BSIZE);
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if (error) {
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aprint_error("%s: unable to read MBR @ %u, "
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"error = %d\n", a->pdk->dk_name, off, a->error);
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a->error = error;
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return;
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}
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mbr = a->buf;
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if (mbr->mbr_magic != htole16(MBR_MAGIC))
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return;
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dp = mbr->mbr_parts;
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for (i = 0; i < MBR_PART_COUNT; i++) {
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/* Extended partitions are handled below. */
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if (dp[i].mbrp_type == 0 ||
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MBR_IS_EXTENDED(dp[i].mbrp_type))
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continue;
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if ((ptype = mbr_ptype_to_str(dp[i].mbrp_type)) == NULL) {
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/*
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* XXX Should probably just add these...
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* XXX maybe just have an empty ptype?
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*/
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aprint_verbose("%s: skipping partition %d, "
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"type 0x%02x\n", a->pdk->dk_name, i,
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dp[i].mbrp_type);
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continue;
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}
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strcpy(dkw.dkw_ptype, ptype);
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strcpy(dkw.dkw_parent, a->pdk->dk_name);
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dkw.dkw_offset = le32toh(dp[i].mbrp_start);
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dkw.dkw_size = le32toh(dp[i].mbrp_size);
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/*
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* These get historical disk naming style
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* wedge names. We start at 'e', and reserve
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* 4 slots for each MBR we parse.
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*
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* XXX For FAT, we should extract the FAT volume
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* XXX name.
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*/
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snprintf(dkw.dkw_wname, sizeof(dkw.dkw_wname),
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"%s%c", a->pdk->dk_name,
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'e' + (a->mbr_count * MBR_PART_COUNT) + i);
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error = dkwedge_add(&dkw);
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if (error == EEXIST)
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aprint_error("%s: wedge named '%s' already "
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"exists, manual intervention required\n",
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a->pdk->dk_name, dkw.dkw_wname);
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else if (error)
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aprint_error("%s: error %d adding partition "
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"%d type 0x%02x\n", a->pdk->dk_name, error,
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(a->mbr_count * MBR_PART_COUNT) + i,
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dp[i].mbrp_type);
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}
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/* We've parsed one MBR. */
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a->mbr_count++;
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/* Recursively scan extended partitions. */
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for (i = 0; i < MBR_PART_COUNT; i++) {
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uint32_t poff;
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if (MBR_IS_EXTENDED(dp[i].mbrp_type)) {
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poff = le32toh(dp[i].mbrp_start) + extoff;
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getparts(a, poff, extoff ? extoff : poff);
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}
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}
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}
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static int
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dkwedge_discover_mbr(struct disk *pdk, struct vnode *vp)
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{
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mbr_args_t a;
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a.pdk = pdk;
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a.vp = vp;
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a.buf = malloc(DEV_BSIZE, M_DEVBUF, M_WAITOK);
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a.error = 0;
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a.mbr_count = 0;
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getparts(&a, MBR_BBSECTOR, 0);
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if (a.mbr_count != 0)
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a.error = 0; /* found it, wedges installed */
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else if (a.error == 0)
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a.error = ESRCH; /* no MBRs found */
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free(a.buf, M_DEVBUF);
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return (a.error);
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}
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DKWEDGE_DISCOVERY_METHOD_DECL(MBR, 10, dkwedge_discover_mbr);
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