summaryrefslogtreecommitdiffstats
path: root/lib/libdisk/disk.c
blob: 78241f2259ec0fea55d55e30334f0758cadacfe3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
/*
 * ----------------------------------------------------------------------------
 * "THE BEER-WARE LICENSE" (Revision 42):
 * <phk@login.dknet.dk> wrote this file.  As long as you retain this notice you
 * can do whatever you want with this stuff. If we meet some day, and you think
 * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
 * ----------------------------------------------------------------------------
 *
 * $FreeBSD$
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <err.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/disklabel.h>
#include <sys/diskslice.h>
#include "libdisk.h"

#define DOSPTYP_EXTENDED        5
#define DOSPTYP_ONTRACK         84

const char *chunk_n[] = {
	"whole",
	"unknown",
	"fat",
	"freebsd",
	"extended",
	"part",
	"unused",
	NULL
};

struct disk *
Open_Disk(const char *name)
{
	return Int_Open_Disk(name,0);
}

static u_int32_t
Read_Int32(u_int32_t *p)
{
    u_int8_t *bp = (u_int8_t *)p;
    return bp[0] | (bp[1] << 8) | (bp[2] << 16) | (bp[3] << 24);
}

struct disk *
Int_Open_Disk(const char *name, u_long size)
{
	int i,fd;
	struct diskslices ds;
	struct disklabel dl;
	char device[64];
	struct disk *d;
#ifdef PC98
	unsigned char *p;
#else
	struct dos_partition *dp;
	void *p;
#endif
	u_long offset = 0;

	strcpy(device,"/dev/r");
	strcat(device,name);

	d = (struct disk *)malloc(sizeof *d);
	if(!d) err(1,"malloc failed");
	memset(d,0,sizeof *d);

	fd = open(device,O_RDONLY);
	if (fd < 0) {
#ifdef DEBUG
		warn("open(%s) failed",device);
#endif
		return 0;
	}

	memset(&dl,0,sizeof dl);
	ioctl(fd,DIOCGDINFO,&dl);
	i = ioctl(fd,DIOCGSLICEINFO,&ds);
	if (i < 0) {
#ifdef DEBUG
		warn("DIOCGSLICEINFO(%s) failed",device);
#endif
		close(fd);
		return 0;
	}

#ifdef DEBUG
	for(i=0;i<ds.dss_nslices;i++)
		if(ds.dss_slices[i].ds_openmask)
			printf("  open(%d)=0x%2x",
				i,ds.dss_slices[i].ds_openmask);
	printf("\n");
#endif

/* XXX --- ds.dss_slice[WHOLE_DISK_SLCIE].ds.size of MO disk is wrong!!! */
#ifdef PC98
	if (!size)
		size = dl.d_ncylinders * dl.d_ntracks * dl.d_nsectors;
#else
	if (!size)
		size = ds.dss_slices[WHOLE_DISK_SLICE].ds_size;
#endif

#ifdef PC98
	p = (unsigned char*)read_block(fd,1);
#else
	p = read_block(fd,0);
	dp = (struct dos_partition*)(p+DOSPARTOFF);
	for (i=0; i < NDOSPART; i++) {
		if (Read_Int32(&dp->dp_start) >= size)
		    continue;
		if (Read_Int32(&dp->dp_start) + Read_Int32(&dp->dp_size) >= size)
		    continue;
		if (!Read_Int32(&dp->dp_size))
		    continue;

		if (dp->dp_typ == DOSPTYP_ONTRACK) {
			d->flags |= DISK_ON_TRACK;
			offset = 63;
		}

	}
	free(p);
#endif

	d->bios_sect = dl.d_nsectors;
	d->bios_hd = dl.d_ntracks;

	d->name = strdup(name);


	if (dl.d_ntracks && dl.d_nsectors)
		d->bios_cyl = size/(dl.d_ntracks*dl.d_nsectors);

#ifdef PC98
	if (Add_Chunk(d, -offset, size, name, whole, 0, 0, "-"))
#else
	if (Add_Chunk(d, -offset, size, name, whole, 0, 0))
#endif
#ifdef DEBUG
		warn("Failed to add 'whole' chunk");
#else
		{}
#endif

#ifdef __i386__
#ifdef PC98
	/* XXX -- Quick Hack!
	 * Check MS-DOG MO
	 */
	if ((*p == 0xf0 || *p == 0xf8) &&
	    (*(p+1) == 0xff) &&
	    (*(p+2) == 0xff)) {
		Add_Chunk(d, 0, size, name, fat, 0xa0a0, 0, name);
	    free(p);
	    goto pc98_mo_done;
	}
	free(p);
#endif /* PC98 */
	for(i=BASE_SLICE;i<ds.dss_nslices;i++) {
		char sname[20];
		chunk_e ce;
		u_long flags=0;
		int subtype=0;
		if (! ds.dss_slices[i].ds_size)
			continue;
		ds.dss_slices[i].ds_offset -= offset;
		sprintf(sname,"%ss%d",name,i-1);
#ifdef PC98
		subtype = ds.dss_slices[i].ds_type |
			ds.dss_slices[i].ds_subtype << 8;
		switch (ds.dss_slices[i].ds_type & 0x7f) {
			case 0x14:
				ce = freebsd;
				break;
			case 0x20:
			case 0x21:
			case 0x22:
			case 0x23:
				ce = fat;
				break;
#else /* IBM-PC */
		subtype = ds.dss_slices[i].ds_type;
		switch (ds.dss_slices[i].ds_type) {
			case 0xa5:
				ce = freebsd;
				break;
			case 0x1:
			case 0x6:
			case 0x4:
			case 0xb:
			case 0xc:
			case 0xe:
				ce = fat;
				break;
			case DOSPTYP_EXTENDED:
			case 0xf:
				ce = extended;
				break;
#endif
			default:
				ce = unknown;
				break;
		}
#ifdef PC98
		if (Add_Chunk(d,ds.dss_slices[i].ds_offset,
			ds.dss_slices[i].ds_size, sname, ce, subtype, flags,
			ds.dss_slices[i].ds_name))
#else
		if (Add_Chunk(d, ds.dss_slices[i].ds_offset,
			ds.dss_slices[i].ds_size, sname, ce, subtype, flags))
#endif
#ifdef DEBUG
			warn("failed to add chunk for slice %d", i - 1);
#else
			{}
#endif

#ifdef PC98
		if ((ds.dss_slices[i].ds_type & 0x7f) != 0x14)
#else
		if (ds.dss_slices[i].ds_type != 0xa5)
#endif
			continue;
		{
		struct disklabel dl;
		char pname[20];
		int j,k;

		strcpy(pname,"/dev/r");
		strcat(pname,sname);
		j = open(pname,O_RDONLY);
		if (j < 0) {
#ifdef DEBUG
			warn("open(%s)",pname);
#endif
			continue;
		}
		k = ioctl(j,DIOCGDINFO,&dl);
		if (k < 0) {
#ifdef DEBUG
			warn("ioctl(%s,DIOCGDINFO)",pname);
#endif
			close(j);
			continue;
		}
		close(j);

		for(j=0; j <= dl.d_npartitions; j++) {
			if (j == RAW_PART)
				continue;
			if (j == 3)
				continue;
			if (j == dl.d_npartitions) {
				j = 3;
				dl.d_npartitions=0;
			}
			if (!dl.d_partitions[j].p_size)
				continue;
			if (dl.d_partitions[j].p_size +
			    dl.d_partitions[j].p_offset >
			    ds.dss_slices[i].ds_size)
				continue;
			sprintf(pname,"%s%c",sname,j+'a');
			if (Add_Chunk(d,
				dl.d_partitions[j].p_offset +
				ds.dss_slices[i].ds_offset,
				dl.d_partitions[j].p_size,
				pname,part,
				dl.d_partitions[j].p_fstype,
#ifdef PC98
				0,
				ds.dss_slices[i].ds_name) && j != 3)
#else
				0) && j != 3)
#endif
#ifdef DEBUG
				warn(
			"Failed to add chunk for partition %c [%lu,%lu]",
			j + 'a',dl.d_partitions[j].p_offset,
			dl.d_partitions[j].p_size);
#else
				{}
#endif
		}
		}
	}
#endif /* __i386__ */
#ifdef __alpha__
	{
		struct disklabel dl;
		char pname[20];
		int j,k;

		strcpy(pname,"/dev/r");
		strcat(pname,name);
		j = open(pname,O_RDONLY);
		if (j < 0) {
#ifdef DEBUG
			warn("open(%s)",pname);
#endif
			goto nolabel;
		}
		k = ioctl(j,DIOCGDINFO,&dl);
		if (k < 0) {
#ifdef DEBUG
			warn("ioctl(%s,DIOCGDINFO)",pname);
#endif
			close(j);
			goto nolabel;
		}
		close(j);
		All_FreeBSD(d, 1);

		for(j=0; j <= dl.d_npartitions; j++) {
			if (j == RAW_PART)
				continue;
			if (j == 3)
				continue;
			if (j == dl.d_npartitions) {
				j = 3;
				dl.d_npartitions=0;
			}
			if (!dl.d_partitions[j].p_size)
				continue;
			if (dl.d_partitions[j].p_size +
			    dl.d_partitions[j].p_offset >
			    ds.dss_slices[WHOLE_DISK_SLICE].ds_size)
				continue;
			sprintf(pname,"%s%c",name,j+'a');
			if (Add_Chunk(d,
				      dl.d_partitions[j].p_offset,
				      dl.d_partitions[j].p_size,
				      pname,part,
				      dl.d_partitions[j].p_fstype,
				      0) && j != 3)
#ifdef DEBUG
				warn(
					"Failed to add chunk for partition %c [%lu,%lu]",
					j + 'a',dl.d_partitions[j].p_offset,
					dl.d_partitions[j].p_size);
#else
			{}
#endif
		}
	nolabel:;
	}
#endif /* __alpha__ */
#ifdef PC98
pc98_mo_done:
#endif
	close(fd);
	Fixup_Names(d);
#ifndef PC98
	Bios_Limit_Chunk(d->chunks,1024*d->bios_hd*d->bios_sect);
#endif
	return d;
}

void
Debug_Disk(struct disk *d)
{
	printf("Debug_Disk(%s)",d->name);
	printf("  flags=%lx",d->flags);
#if 0
	printf("  real_geom=%lu/%lu/%lu",d->real_cyl,d->real_hd,d->real_sect);
#endif
	printf("  bios_geom=%lu/%lu/%lu = %lu\n",
		d->bios_cyl,d->bios_hd,d->bios_sect,
		d->bios_cyl*d->bios_hd*d->bios_sect);
#if defined(__i386__)
	printf("  boot1=%p, boot2=%p, bootmgr=%p\n",
		d->boot1,d->boot2,d->bootmgr);
#elif defined(__alpha__)
	printf("  boot1=%p, bootmgr=%p\n",
		d->boot1,d->bootmgr);
#endif
	Debug_Chunk(d->chunks);
}

void
Free_Disk(struct disk *d)
{
	if(d->chunks) Free_Chunk(d->chunks);
	if(d->name) free(d->name);
	if(d->bootmgr) free(d->bootmgr);
	if(d->boot1) free(d->boot1);
#if defined(__i386__)
	if(d->boot2) free(d->boot2);
#endif
	free(d);
}

struct disk *
Clone_Disk(struct disk *d)
{
	struct disk *d2;

	d2 = (struct disk*) malloc(sizeof *d2);
	if(!d2) err(1,"malloc failed");
	*d2 = *d;
	d2->name = strdup(d2->name);
	d2->chunks = Clone_Chunk(d2->chunks);
	if(d2->bootmgr) {
		d2->bootmgr = malloc(DOSPARTOFF);
		memcpy(d2->bootmgr,d->bootmgr,DOSPARTOFF);
	}
#if defined(__i386__)
	if(d2->boot1) {
		d2->boot1 = malloc(512);
		memcpy(d2->boot1,d->boot1,512);
	}
	if(d2->boot2) {
		d2->boot2 = malloc(512*15);
		memcpy(d2->boot2,d->boot2,512*15);
	}
#elif defined(__alpha__)
	if(d2->boot1) {
		d2->boot1 = malloc(512*15);
		memcpy(d2->boot1,d->boot1,512*15);
	}
#endif
	return d2;
}

#if 0
void
Collapse_Disk(struct disk *d)
{

	while(Collapse_Chunk(d,d->chunks))
		;
}
#endif

static char * device_list[] = {"wd", "ad", "da", "wfd", "fla", "idad", "mlxd", "amrd", 0};

char **
Disk_Names()
{
    int i,j,k;
    char disk[25];
    char diskname[25];
    struct stat st;
    struct diskslices ds;
    int fd;
    static char **disks;

    disks = malloc(sizeof *disks * (1 + MAX_NO_DISKS));
    memset(disks,0,sizeof *disks * (1 + MAX_NO_DISKS));
    k = 0;
	for (j = 0; device_list[j]; j++) {
		for (i = 0; i < MAX_NO_DISKS; i++) {
			sprintf(diskname, "%s%d", device_list[j], i);
			sprintf(disk, "/dev/r%s", diskname);
			if (stat(disk, &st) || !(st.st_mode & S_IFCHR))
				continue;
			if ((fd = open(disk, O_RDWR)) == -1)
				continue;
			if (ioctl(fd, DIOCGSLICEINFO, &ds) == -1) {
#ifdef DEBUG
				warn("DIOCGSLICEINFO %s", disk);
#endif
				close(fd);
				continue;
			}
			close(fd);
			disks[k++] = strdup(diskname);
			if(k == MAX_NO_DISKS)
				return disks;
		}
	}
	return disks;
}

void
Set_Boot_Mgr(struct disk *d, const u_char *b)
{
#ifndef PC98
	if (d->bootmgr)
		free(d->bootmgr);
	if (!b) {
		d->bootmgr = 0;
	} else {
		d->bootmgr = malloc(DOSPARTOFF);
		if(!d->bootmgr) err(1,"malloc failed");
		memcpy(d->bootmgr,b,DOSPARTOFF);
	}
#endif
}

void
Set_Boot_Blocks(struct disk *d, const u_char *b1, const u_char *b2)
{
#if defined(__i386__)
	if (d->boot1) free(d->boot1);
	d->boot1 = malloc(512);
	if(!d->boot1) err(1,"malloc failed");
	memcpy(d->boot1,b1,512);
	if (d->boot2) free(d->boot2);
	d->boot2 = malloc(15*512);
	if(!d->boot2) err(1,"malloc failed");
	memcpy(d->boot2,b2,15*512);
#elif defined(__alpha__)
	if (d->boot1) free(d->boot1);
	d->boot1 = malloc(15*512);
	if(!d->boot1) err(1,"malloc failed");
	memcpy(d->boot1,b1,15*512);
#endif
}

const char *
slice_type_name( int type, int subtype )
{
	switch (type) {
		case 0:		return "whole";
#ifndef	PC98
		case 1:		switch (subtype) {
					case 1:		return "fat (12-bit)";
					case 2:		return "XENIX /";
					case 3:		return "XENIX /usr";
					case 4:         return "fat (16-bit,<=32Mb)";
					case 5:		return "extended DOS";
					case 6:         return "fat (16-bit,>32Mb)";
					case 7:         return "NTFS/HPFS/QNX";
					case 8:         return "AIX bootable";
					case 9:         return "AIX data";
					case 10:	return "OS/2 bootmgr";
					case 11:        return "fat (32-bit)";
					case 12:        return "fat (32-bit,LBA)";
					case 14:        return "fat (16-bit,>32Mb,LBA)";
					case 15:        return "extended DOS, LBA";
					case 18:        return "Compaq Diagnostic";
					case 84:	return "OnTrack diskmgr";
					case 100:	return "Netware 2.x";
					case 101:	return "Netware 3.x";
					case 115:	return "SCO UnixWare";
					case 128:	return "Minix 1.1";
					case 129:	return "Minix 1.5";
					case 130:	return "linux_swap";
					case 131:	return "ext2fs";
					case 166:	return "OpenBSD FFS";	/* 0xA6 */
					case 169:	return "NetBSD FFS";	/* 0xA9 */
					case 182:	return "OpenBSD";		/* dedicated */
					case 183:	return "bsd/os";
					case 184:	return "bsd/os swap";
					default:	return "unknown";
				}
#endif
		case 2:		return "fat";
		case 3:		switch (subtype) {
#ifdef	PC98
					case 0xc494:	return "freebsd";
#else
					case 165:	return "freebsd";
#endif
					default:	return "unknown";
				}
#ifndef	PC98
		case 4:		return "extended";
		case 5:		return "part";
		case 6:		return "unused";
#endif
		default:	return "unknown";
	}
}
OpenPOWER on IntegriCloud