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-rw-r--r--scsi/disk_label.c692
1 files changed, 0 insertions, 692 deletions
diff --git a/scsi/disk_label.c b/scsi/disk_label.c
deleted file mode 100644
index ab20378..0000000
--- a/scsi/disk_label.c
+++ /dev/null
@@ -1,692 +0,0 @@
-/*
- * Copyright (c) 1996 The University of Utah and
- * the Computer Systems Laboratory at the University of Utah (CSL).
- * All rights reserved.
- *
- * Permission to use, copy, modify and distribute this software is hereby
- * granted provided that (1) source code retains these copyright, permission,
- * and disclaimer notices, and (2) redistributions including binaries
- * reproduce the notices in supporting documentation, and (3) all advertising
- * materials mentioning features or use of this software display the following
- * acknowledgement: ``This product includes software developed by the
- * Computer Systems Laboratory at the University of Utah.''
- *
- * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
- * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
- * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
- * CSL requests users of this software to return to csl-dist@cs.utah.edu any
- * improvements that they make and grant CSL redistribution rights.
- *
- * Author: Kevin T. Van Maren, University of Utah CSL
- */
-
-/*
- * Mach Operating System
- * Copyright (c) 1991,1990 Carnegie Mellon University
- * All Rights Reserved.
- *
- * Permission to use, copy, modify and distribute this software and its
- * documentation is hereby granted, provided that both the copyright
- * notice and this permission notice appear in all copies of the
- * software, derivative works or modified versions, and any portions
- * thereof, and that both notices appear in supporting documentation.
- *
- * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
- * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
- * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
- * Carnegie Mellon requests users of this software to return to
- *
- * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
- * School of Computer Science
- * Carnegie Mellon University
- * Pittsburgh PA 15213-3890
- *
- * any improvements or extensions that they make and grant Carnegie Mellon
- * the rights to redistribute these changes.
- */
-
-/*
- * Copyright (c) 1994 Shantanu Goel
- * All Rights Reserved.
- *
- * Permission to use, copy, modify and distribute this software and its
- * documentation is hereby granted, provided that both the copyright
- * notice and this permission notice appear in all copies of the
- * software, derivative works or modified versions, and any portions
- * thereof, and that both notices appear in supporting documentation.
- *
- * THE AUTHOR ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
- * CONDITION. THE AUTHOR DISCLAIMS ANY LIABILITY OF ANY KIND FOR
- * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
- */
-
-/* This file contains the partition code that is used by the Mach
- * device drivers (ide & scsi). */
-
-#include <scsi/compat_30.h>
-#include <sys/types.h>
-
-#include <scsi/rz_labels.h>
-#include <i386at/disk.h> /* combine & rename these... */
-
-#define SECTOR_SIZE 512 /* BAD!!! */
-
-#define DSLICE(dev) ((dev >> 4) & 0x3f)
-#define DPART(dev) (dev & 0xf)
-
-/* note: 0 will supress ALL output;
- 1 is 'normal' output; 2 is verbose; 3 is Very verbose */
-#define PARTITION_DEBUG 1
-
-#define min(x,y) (x<y?x:y)
-
-/*
- * Label that is filled in with extra info
- */
-struct disklabel default_label =
-{
- DISKMAGIC, DTYPE_SCSI, 0,
- "SCSI", "",
- DEV_BSIZE, 1, 1, 1, 1, 1, 0, 0, 0,
- 3600, 1, 1, 1, 0, 0, 0,
- {0,}, {0,},
- DISKMAGIC, 0,
- 8, 8192, 8192,
- {{ -1, 0, 1024, FS_BSDFFS, 8, 3 },
- { -1, 0, 1024, FS_BSDFFS, 8, 3 },
- { -1, 0, 1024, FS_BSDFFS, 8, 3 },
- { -1, 0, 1024, FS_BSDFFS, 8, 3 },
- { -1, 0, 1024, FS_BSDFFS, 8, 3 },
- { -1, 0, 1024, FS_BSDFFS, 8, 3 },
- { -1, 0, 1024, FS_BSDFFS, 8, 3 },
- { -1, 0, 1024, FS_BSDFFS, 8, 3 }}
-};
-
-
-
-/* the device driver calls this just to save some info it got from the HW */
-/* This is a bad holdover from the disklabel days, and needs to go */
-fudge_bsd_label(struct disklabel *label, int type, int total_secs, int heads, int sectors, int sectorsize, int n)
-{
- *label=default_label;
-
- label->d_ncylinders = total_secs/(heads*sectors);
- label->d_ntracks = heads;
- label->d_nsectors = sectors;
-
- label->d_secpercyl = heads*sectors;
- label->d_secperunit = total_secs;
-
- /* this is never used, but ... */
- label->d_partitions[MAXPARTITIONS].p_offset = 0;
- label->d_partitions[MAXPARTITIONS].p_size = total_secs;
-
- /* ??
- */
- label->d_secsize = sectorsize;
- label->d_type = type;
- label->d_subtype = 0xa; /* ??? */
-
- label->d_npartitions = n; /* up to 'c' */
- label->d_checksum = 0;
-
- /* should do a checksum on it now */
-}
-
-
-
-/* This is placed here to
- a. provide comparability with existing servers
- b. allow the use of FreeBSD-style slices to access ANY disk partition
- c. provide an easy migration path to lites-based partition code
- by only passing the drive name to get the entire disk (sd0).
-
- This will be called by every routine that needs to access partition info
- based on a device number. It is slower than the old method of indexing
- into a disklabel, but is more flexible, and reasonably fast in the (future)
- case where Lites will access the whole disk. An array of disklabels
- could have been used, but this is more compact and general. The underlying
- structure does not limit it to 2-levels, but keeping the kernel interface
- simple does. */
-
-
-/* this code and data structure based on conversation with Bryan Ford */
-/* Note: this is called ON EVERY read or write. It makes sense to
- optimize this for the common case. Hopefully the common case
- will become the '0,0' case, as partitioning is moved out of the
- kernel. (Downside is kernel can't protect filesystems from each other).
- It is slower than indexing into a 1-D array, but not much. */
-
-struct diskpart *lookup_part(struct diskpart *array, int dev_number)
-{
-/* Note: 10 bit encoding to get partitions 0-15 (0,a-h typically), and slices
- * 0-63
- */
-
- int slice = DSLICE(dev_number);
- int part = DPART(dev_number);
- struct diskpart *s;
-
- if (slice == 0) /* compatability slice */
- {
- if (part == 0) /* whole disk */
- return &array[0];
-
- if (array[0].type == DISKPART_DOS)
- {
- int i;
- for (i = 0; i < array[0].nsubs; i++)
- {
- s = &array[0].subs[i];
- if ( s->type == DISKPART_BSD
- || s->type == DISKPART_VTOC)
- {
- if (part > s->nsubs)
- return 0;
- return (&s->subs[part-1]);
- }
- }
- }
-
- if (part > array[0].nsubs)
- return 0;
- return(&array[0].subs[part-1]);
- }
- else
- {
- if ( array[0].type != DISKPART_DOS
- || slice > array[0].nsubs)
- return 0;
-
- s = &array[0].subs[slice-1];
-
- if (part == 0) /* whole slice */
- return (s);
- if (part > s->nsubs)
- return 0;
-
- return (&s->subs[part-1]);
- }
-}
-
-
-
-
-static inline void fill_array(struct diskpart *array, int start, int size,
- struct diskpart *subs, int nsubs, short type, short fsys)
-{
- array->start=start;
- array->size=size;
- array->subs=subs;
- array->nsubs=nsubs;
- array->type=type;
- array->fsys=fsys;
-#if (PARTITION_DEBUG > 2)
- printf("fill: type %d:%d, start %d, size %d, %d parts\n",type,fsys,
- start,size,nsubs);
-#endif
-}
-
-
-
-
-void print_array(struct diskpart *array, int level)
-{
- int i,j;
- struct diskpart *subs;
-
-#if (PARTITION_DEBUG)
- subs=array[0].subs;
-
- for (i=0;i<array[0].nsubs;i++) {
- for (j=0;j<level;j++)
- printf(" ");
- printf("%c: %d, %d, %d, %d (%d subparts)\n",'a'+i,
- subs[i].start, subs[i].size, subs[i].fsys,
- subs[i].type, subs[i].nsubs);
- if (subs[i].nsubs>0)
- print_array(&subs[i], level+1);
- }
-#endif
-}
-
-
-
-/* individual routines to find the drive labels.
- There needs to be a function for every different method for partitioning
- much of the following code is derived from the SCSI/IDE drivers */
-
-int get_dos(struct diskpart *array, char *buff, int start,
- void *driver_info, int (*bottom_read_fun)(),
- char *name, int max_part)
-{
-
- bios_label_t *mp;
- struct bios_partition_info *pp;
-
- int count, i, j;
- int pstart, psize;
- int ext=-1, mystart=start, mybase;
- int first=1;
-
- /* note: start is added, although a start != 0 is meaningless
- to DOS and anything else... */
-
- /* check the boot sector for a partition table. */
- (*bottom_read_fun)(driver_info, start, buff); /* always in sector 0 */
-
- /*
- * Check for valid partition table.
- */
- mp = (bios_label_t *)&buff[BIOS_LABEL_BYTE_OFFSET];
- if (mp->magic != BIOS_LABEL_MAGIC) {
-#if (PARTITION_DEBUG>1)
- printf("%s invalid partition table\n", name);
-#endif
- return(0); /* didn't add any partitions */
- }
-#if (PARTITION_DEBUG>1)
- printf("DOS partition table found\n");
-#endif
-
- count=min(4,max_part); /* always 4 (primary) partitions */
-#if (PARTITION_DEBUG)
- if (count<4) printf("More partitions than space!\n");
-#endif
-
-
- /* fill the next 4 entries in the array */
- for (i=0, pp=(struct bios_partition_info *)mp->partitions;
- i<count; i++,pp++) {
-
- fill_array(&array[i], pp->offset, pp->n_sectors, NULL, 0,
- DISKPART_NONE, pp->systid);
- if ((pp->systid == DOS_EXTENDED) &&(ext<0)) {
- mystart+=pp->offset;
- ext=i;
- }
- }
-
- /* if there is an extended partition, find all the logical partitions */
- /* note: logical start at '5' (extended is one of the numbered 1-4) */
-
- /* logical partitions 'should' be nested inside the primary, but
- then it would be impossible to NAME a disklabel inside a logical
- partition, which would be nice to do */
-#if (PARTITION_DEBUG>1)
- if (ext>=0)
- printf("extended partition found: %d\n",ext);
-#endif 0
-
- while (ext>=0) {
- pp = &(((struct bios_partition_info *)mp->partitions)[ext]);
-
- /* read the EXTENDED partition table */
- if (first) {
- mybase=mystart;
- first=0;
- } else {
- mybase=mystart+pp->offset;
- }
-
- (*bottom_read_fun)(driver_info, mybase, buff);
-
- if (mp->magic != BIOS_LABEL_MAGIC) {
-#if (PARTITION_DEBUG>1)
- printf("%s invalid expanded magic\n", name);
-#endif
- return(count);/*don't add any more partitions*/
- }
-
- /* just in case more than one partition is there...*/
- /* search the EXTENDED partition table */
- ext=-1;
- for (j=0,pp=(struct bios_partition_info *)mp->partitions;
- j<4; j++,pp++) {
-
- if (pp->systid && (pp->systid!=DOS_EXTENDED)) {
- if (count<max_part) {
- fill_array(&array[count],
- mybase +pp->offset,
- pp->n_sectors, NULL, 0, DISKPART_NONE,
- pp->systid);
- count++; }
- else {
-#if (PARTITION_DEBUG)
- printf("More partitions than space!\n");
-#endif
- return(count);
- }
- } else if ((ext<0) &&(pp->systid==DOS_EXTENDED)) {
- ext=j;
- /* recursivly search the chain here */
- }
- }
- }
-#if (PARTITION_DEBUG>1)
- printf("%d dos partitions\n",count);
-#endif 0
- return(count); /* number dos partitions found */
-
-}
-
-
-
-/* this should work on the bare drive, or in a dos partition */
-int get_disklabel(struct diskpart *array, char *buff, int start,
- void *driver_info, int (*bottom_read_fun)(),
- char *name, int max_part)
-{
- struct disklabel *dlp;
- int mybase = start + (512 * LBLLOC)/SECTOR_SIZE, i;
- int count;
-
- (*bottom_read_fun)(driver_info, mybase, buff);
-
- dlp = (struct disklabel *)buff;
- if (dlp->d_magic != DISKMAGIC || dlp->d_magic2 != DISKMAGIC) {
-#if (PARTITION_DEBUG>1)
- printf("%s no BSD label found\n",name);
-#endif
- return(0); /* no partitions added */
- }
-#if (PARTITION_DEBUG>1)
- printf(" BSD LABEL\n");
-#endif 0
- /* note: BSD disklabel offsets are from start of DRIVE -- uuggh */
-
- count=min(8,max_part); /* always 8 in a disklabel */
-#if (PARTITION_DEBUG)
- if (count<8) printf("More partitions than space!\n");
-#endif
- /* COPY into the array */
- for (i=0;i<count;i++)
- fill_array(&array[i], /* mybase + */
- dlp->d_partitions[i].p_offset,
- dlp->d_partitions[i].p_size,
- NULL, 0, DISKPART_NONE, dlp->d_partitions[i].p_fstype);
-
- /* note: p_fstype is not the same set as the DOS types */
-
- return(count); /* 'always' 8 partitions in disklabel -- if space */
-
-/* UNREACHED CODE FOLLOWS: (alternative method in scsi) */
-#if 0
- (*bottom_read_fun)(driver_info, (start)+LABELSECTOR, buff);
-
- register int j;
- boolean_t found;
-
- for (j = LABELOFFSET, found = FALSE;
- j < (SECTOR_SIZE-sizeof(struct disklabel));
- j += sizeof(int)) {
- search = (struct disklabel *)&buff[j];
- if (search->d_magic == DISKMAGIC &&
- search->d_magic2 == DISKMAGIC) {
- found = TRUE;
- break;
- }
- }
- if (found) {
-#if (PARTITION_DEBUG>1)
- printf("Label found in LABELSECTOR\n");
-#endif
- } else {
- search = 0;
- }
-
-
-#endif 0
-
-}
-
-
-/* NOT TESTED! */
-/* VTOC in sector 29 */
-int get_vtoc(struct diskpart *array, char *buff, int start,
- void *driver_info, int (*bottom_read_fun)(),
- char *name, int max_part)
-{
- struct evtoc *evp;
- int n,i;
- struct disklabel lpl;
- struct disklabel *lp = &lpl;
-
-#if (PARTITION_DEBUG)
- printf("Read VTOC.\n");
-#endif
- (*bottom_read_fun)(driver_info, start +PDLOCATION, buff);
- evp = (struct evtoc *)buff;
- if (evp->sanity != VTOC_SANE) {
-#if (PARTITION_DEBUG)
- printf("%s evtoc corrupt or not found\n", name);
-#endif
- return(0);
- }
- n = min(evp->nparts,max_part); /* no longer DISKLABEL limitations... */
-#if 0
- n = (evp->nparts > MAXPARTITIONS) ? MAXPARTITIONS : evp->nparts;
-#endif 0
-
- for (i = 0; i < n; i++)
- fill_array(&array[i], /* mybase + */
- evp->part[i].p_start,
- evp->part[i].p_size,
- NULL, 0, DISKPART_NONE, FS_BSDFFS);
-
- return(n); /* (evp->nparts) */
-}
-
-
-/* NOT TESTED! */
-int get_omron(struct diskpart *array, char *buff, int start,
- void *driver_info, int (*bottom_read_fun)(),
- char *name, int max_part)
-{
-
- struct disklabel *label;
-
- /* here look for an Omron label */
- register omron_label_t *part;
- int i;
-
-#if (PARTITION_DEBUG)
- printf("Looking for Omron label...\n");
-#endif
-
- (*bottom_read_fun)(driver_info, start+
- OMRON_LABEL_BYTE_OFFSET/SECTOR_SIZE, buff);
-
- part = (omron_label_t*)&buff[OMRON_LABEL_BYTE_OFFSET%SECTOR_SIZE];
- if (part->magic == OMRON_LABEL_MAGIC) {
-#if (PARTITION_DEBUG)
- printf("{Using OMRON label}");
-#endif
- for (i = 0; i < 8; i++) {
- label->d_partitions[i].p_size = part->partitions[i].n_sectors;
- label->d_partitions[i].p_offset = part->partitions[i].offset;
- }
- bcopy(part->packname, label->d_packname, 16);
- label->d_ncylinders = part->ncyl;
- label->d_acylinders = part->acyl;
- label->d_ntracks = part->nhead;
- label->d_nsectors = part->nsect;
- /* Many disks have this wrong, therefore.. */
-#if 0
- label->d_secperunit = part->maxblk;
-#else
- label->d_secperunit = label->d_ncylinders * label->d_ntracks *
- label->d_nsectors;
-#endif 0
-
- return(8);
- }
-#if (PARTITION_DEBUG)
- printf("No Omron label found.\n");
-#endif
- return(0);
-}
-
-
-/* NOT TESTED! */
-int get_dec(struct diskpart *array, char *buff, int start,
- void *driver_info, int (*bottom_read_fun)(),
- char *name, int max_part)
-{
- struct disklabel *label;
-
- /* here look for a DEC label */
- register dec_label_t *part;
- int i;
-
-#if (PARTITION_DEBUG)
- printf("Checking for dec_label...\n");
-#endif
-
- (*bottom_read_fun)(driver_info, start +
- DEC_LABEL_BYTE_OFFSET/SECTOR_SIZE, buff);
-
- if (part->magic == DEC_LABEL_MAGIC) {
-#if (PARTITION_DEBUG)
- printf("{Using DEC label}");
-#endif
- for (i = 0; i < 8; i++) {
- label->d_partitions[i].p_size = part->partitions[i].n_sectors;
- label->d_partitions[i].p_offset = part->partitions[i].offset;
- }
- return(8);
- }
-#if (PARTITION_DEBUG)
- printf("No dec label found.\n");
-#endif
-
- return(0);
-}
-
-
-
-
-/* array is a pointer to an array of partition_info structures */
-/* array_size is the number of pre-allocated entries there are */
-int get_only_partition(void *driver_info, int (*bottom_read_fun)(),
- struct diskpart *array, int array_size,
- int disk_size, char *drive_name)
-{
- char buff[SECTOR_SIZE];
- int i,n,cnt;
- int arrsize;
- struct diskpart *res;
-
- /* first fill in the entire disk stuff */
- /* or should the calling routine do that already? */
-
- fill_array(array, 0, disk_size, NULL, 0, -1, -1);
-
- /* while the structure does not preclude additional nestings,
- additional ones make no sense currently, so they are not
- checked (Mach can't handle them anyway). It might be nice
- if for all partitions found, all types of sub-partitions
- were looked for (unnecessary). This will be done when this
- is moved out of ther kernel, and there is some way to name them */
-
- arrsize = array_size -1; /* 1 for whole disk */
-
- /* search for dos partition table */
- /* find all the partitions (including logical) */
- n=get_dos(&array[1], buff, 0,
- driver_info, (bottom_read_fun), drive_name,
- arrsize);
-
- if (n>0) {
- fill_array(array, 0, disk_size, &array[1], n,
- DISKPART_DOS, 256+DISKPART_DOS);
- arrsize-=n;
-
-
- /* search each one for a BSD disklabel (iff BSDOS) */
- /* note: searchine extended and logical partitions */
- for (i=0;i<n;i++)
- if (array[i+1].fsys==BSDOS) {
-#if (PARTITION_DEBUG)
- printf("BSD OS slice: %d\n",i+1);
-#endif
- cnt=get_disklabel(&array[n+1], buff,
- array[i+1].start,
- driver_info, (bottom_read_fun),
- drive_name,arrsize);
-
- if (cnt>0) {
- arrsize-=cnt;
- fill_array(&array[i+1],array[i+1].start,
- array[i+1].size, &array[n+1],
- cnt, DISKPART_BSD,
- array[i+1].fsys);
- }
- n+=cnt;
- }
-
- /* search for VTOC -- in a DOS partition as well */
- for (i=0;i<n;i++)
- if (array[i+1].fsys==UNIXOS) {
-#if (PARTITION_DEBUG)
- printf("UNIXOS (vtoc) partition\n");
-#endif
- cnt=get_vtoc(&array[n+1], buff,
- array[i+1].start,
- driver_info, (bottom_read_fun),
- drive_name,arrsize);
-
- if (cnt>0) {
- arrsize-=cnt;
- fill_array(&array[i+1],array[i+1].start,
- array[i+1].size, &array[n+1],
- cnt, DISKPART_VTOC,
- array[i+1].fsys);
- }
- n+=cnt;
- }
- }
-
- /* search for only disklabel */
- if (n==0) {
- fill_array(array, 0, disk_size, &array[1], n, DISKPART_BSD,
- 256+DISKPART_BSD);
- n=get_disklabel(&array[1], buff, 0, driver_info,
- (bottom_read_fun), drive_name,arrsize);
- }
-
- /* search for only VTOC -- NOT TESTED! */
- if (n==0) {
- fill_array(array, 0, disk_size, &array[1], n, DISKPART_VTOC,
- 256+DISKPART_VTOC);
- n=get_vtoc(&array[1], buff, 0, driver_info, (bottom_read_fun),
- drive_name,arrsize);
- }
-#if 0
- /* search for only omron -- NOT TESTED! */
- if (n==0) {
- fill_array(array, 0, disk_size, &array[1], n, DISKPART_OMRON,
- 256+DISKPART_OMRON);
- n=get_omron(&array[1], buff, 0,driver_info, (bottom_read_fun),
- drive_name,arrsize);
- }
-
- /* search for only dec -- NOT TESTED! */
- if (n==0) {
- fill_array(array, 0, disk_size, &array[1], n, DISKPART_DEC,
- 256+DISKPART_DEC);
- n=get_dec(&array[1], buff, 0, driver_info, (bottom_read_fun),
- drive_name,arrsize);
- }
-#endif 0
-
-#if (PARTITION_DEBUG) /* print out what we found */
- print_array(array,0);
-#endif
-
-}
-
-
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