37cb22f7f4
- convert boot1.efi to corrrectly calculate the lba for what the
media reports and convert the size based on what FreeBSD uses.
The existing code would use the 512 byte lba and convert the
size using 4K byte size.
- make fsck_msdosfs read the boot block as 4K so the read doesn't
fail on a 4Kn drive since FreeBSD will error out parition reads
of a block. Make the bpbBytesPerSec check a multiple of 512 since
it can be 512 or 4K depending on the disk. This allows fsck to
pass checking the EFI partition on a 4Kn disk.
To create the EFI file system I used:
newfs_msdos -F 32 -S 4096 -c 1 -m 0xf8 <partition>
This works for booting 512 and 4Kn disks.
Caveat is that loader.efi cannot read the 4Kn EFI partition. This isn't
critical right now since boot1.efi will read loader.efi from the ufs
partition. It looks like loader.efi can be fixed via making some of the
512 bytes reads more flexible. loader.efi doesn't have trouble reading
the ufs partition. This is probably a simple fix.
I now have FreeBSD installed on a system with 4Kn drives and tested the
same code works on 512.
MFC after: 1 week
140 lines
5.0 KiB
C
140 lines
5.0 KiB
C
/*
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* Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
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* Copyright (c) 1995 Martin Husemann
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* Some structure declaration borrowed from Paul Popelka
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* (paulp@uts.amdahl.com), see /sys/msdosfs/ for reference.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* $NetBSD: dosfs.h,v 1.4 1997/01/03 14:32:48 ws Exp $
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* $FreeBSD$
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*/
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#ifndef DOSFS_H
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#define DOSFS_H
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/* support 4Kn disk reads */
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#define DOSBOOTBLOCKSIZE_REAL 512
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#define DOSBOOTBLOCKSIZE 4096
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typedef u_int32_t cl_t; /* type holding a cluster number */
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/*
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* architecture independent description of all the info stored in a
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* FAT boot block.
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*/
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struct bootblock {
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u_int bpbBytesPerSec; /* bytes per sector */
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u_int bpbSecPerClust; /* sectors per cluster */
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u_int bpbResSectors; /* number of reserved sectors */
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u_int bpbFATs; /* number of bpbFATs */
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u_int bpbRootDirEnts; /* number of root directory entries */
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u_int32_t bpbSectors; /* total number of sectors */
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u_int bpbMedia; /* media descriptor */
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u_int bpbFATsmall; /* number of sectors per FAT */
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u_int SecPerTrack; /* sectors per track */
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u_int bpbHeads; /* number of heads */
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u_int32_t bpbHiddenSecs; /* # of hidden sectors */
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u_int32_t bpbHugeSectors; /* # of sectors if bpbbpbSectors == 0 */
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cl_t bpbRootClust; /* Start of Root Directory */
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u_int bpbFSInfo; /* FSInfo sector */
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u_int bpbBackup; /* Backup of Bootblocks */
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cl_t FSFree; /* Number of free clusters acc. FSInfo */
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cl_t FSNext; /* Next free cluster acc. FSInfo */
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/* and some more calculated values */
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u_int flags; /* some flags: */
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#define FAT32 1 /* this is a FAT32 file system */
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/*
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* Maybe, we should separate out
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* various parts of FAT32? XXX
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*/
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int ValidFat; /* valid fat if FAT32 non-mirrored */
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cl_t ClustMask; /* mask for entries in FAT */
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cl_t NumClusters; /* # of entries in a FAT */
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u_int32_t NumSectors; /* how many sectors are there */
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u_int32_t FATsecs; /* how many sectors are in FAT */
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u_int32_t NumFatEntries; /* how many entries really are there */
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u_int ClusterOffset; /* at what sector would sector 0 start */
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u_int ClusterSize; /* Cluster size in bytes */
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/* Now some statistics: */
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u_int NumFiles; /* # of plain files */
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u_int NumFree; /* # of free clusters */
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u_int NumBad; /* # of bad clusters */
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};
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struct fatEntry {
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cl_t next; /* pointer to next cluster */
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cl_t head; /* pointer to start of chain */
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u_int32_t length; /* number of clusters on chain */
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int flags; /* see below */
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};
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#define CLUST_FREE 0 /* 0 means cluster is free */
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#define CLUST_FIRST 2 /* 2 is the minimum valid cluster number */
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#define CLUST_RSRVD 0xfffffff6 /* start of reserved clusters */
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#define CLUST_BAD 0xfffffff7 /* a cluster with a defect */
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#define CLUST_EOFS 0xfffffff8 /* start of EOF indicators */
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#define CLUST_EOF 0xffffffff /* standard value for last cluster */
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/*
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* Masks for cluster values
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*/
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#define CLUST12_MASK 0xfff
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#define CLUST16_MASK 0xffff
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#define CLUST32_MASK 0xfffffff
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#define FAT_USED 1 /* This fat chain is used in a file */
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#define DOSLONGNAMELEN 256 /* long name maximal length */
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#define LRFIRST 0x40 /* first long name record */
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#define LRNOMASK 0x1f /* mask to extract long record
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* sequence number */
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/*
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* Architecture independent description of a directory entry
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*/
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struct dosDirEntry {
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struct dosDirEntry
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*parent, /* previous tree level */
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*next, /* next brother */
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*child; /* if this is a directory */
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char name[8+1+3+1]; /* alias name first part */
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char lname[DOSLONGNAMELEN]; /* real name */
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uint flags; /* attributes */
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cl_t head; /* cluster no */
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u_int32_t size; /* filesize in bytes */
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uint fsckflags; /* flags during fsck */
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};
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/* Flags in fsckflags: */
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#define DIREMPTY 1
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#define DIREMPWARN 2
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/*
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* TODO-list of unread directories
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*/
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struct dirTodoNode {
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struct dosDirEntry *dir;
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struct dirTodoNode *next;
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};
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#endif
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