summaryrefslogtreecommitdiff
path: root/drivers/scsi/scsi_devinfo.c
blob: f01ec0a7c506f2a68ec8fc993ec643a58d47f1fa (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
#include <linux/blkdev.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>

#include <scsi/scsi_device.h>
#include <scsi/scsi_devinfo.h>

#include "scsi_priv.h"


/*
 * scsi_dev_info_list: structure to hold black/white listed devices.
 */
struct scsi_dev_info_list {
	struct list_head dev_info_list;
	char vendor[8];
	char model[16];
	unsigned flags;
	unsigned compatible; /* for use with scsi_static_device_list entries */
};


static const char spaces[] = "                "; /* 16 of them */
static unsigned scsi_default_dev_flags;
static LIST_HEAD(scsi_dev_info_list);
static char scsi_dev_flags[256];

/*
 * scsi_static_device_list: deprecated list of devices that require
 * settings that differ from the default, includes black-listed (broken)
 * devices. The entries here are added to the tail of scsi_dev_info_list
 * via scsi_dev_info_list_init.
 *
 * Do not add to this list, use the command line or proc interface to add
 * to the scsi_dev_info_list. This table will eventually go away.
 */
static struct {
	char *vendor;
	char *model;
	char *revision;	/* revision known to be bad, unused */
	unsigned flags;
} scsi_static_device_list[] __initdata = {
	/*
	 * The following devices are known not to tolerate a lun != 0 scan
	 * for one reason or another. Some will respond to all luns,
	 * others will lock up.
	 */
	{"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN},	/* locks up */
	{"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN},	/* locks up */
	{"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN},	/* locks up */
	{"DENON", "DRD-25X", "V", BLIST_NOLUN},			/* locks up */
	{"HITACHI", "DK312C", "CM81", BLIST_NOLUN},	/* responds to all lun */
	{"HITACHI", "DK314C", "CR21", BLIST_NOLUN},	/* responds to all lun */
	{"IMS", "CDD521/10", "2.06", BLIST_NOLUN},	/* locks up */
	{"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN},	/* locks up */
	{"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN},	/* locks up */
	{"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN},	/* locks up */
	{"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN},	/* locks up */
	{"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN},	/* locks up */
	{"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN},	/* responds to all lun */
	{"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN},	/* responds to all lun */
	{"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
	{"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN},	/* responds to all lun */
	{"RODIME", "RO3000S", "2.33", BLIST_NOLUN},	/* locks up */
	{"SUN", "SENA", NULL, BLIST_NOLUN},		/* responds to all luns */
	/*
	 * The following causes a failed REQUEST SENSE on lun 1 for
	 * aha152x controller, which causes SCSI code to reset bus.
	 */
	{"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
	/*
	 * The following causes a failed REQUEST SENSE on lun 1 for
	 * aha152x controller, which causes SCSI code to reset bus.
	 */
	{"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
	{"SEAGATE", "ST296", "921", BLIST_NOLUN},	/* responds to all lun */
	{"SEAGATE", "ST1581", "6538", BLIST_NOLUN},	/* responds to all lun */
	{"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
	{"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
	{"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
	{"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
	{"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
	{"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN},	/* locks up */
	{"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN},	/* locks up */
	/*
	 * The following causes a failed REQUEST SENSE on lun 1 for
	 * seagate controller, which causes SCSI code to reset bus.
	 */
	{"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
	{"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN},	/* responds to all lun */
	/*
	 * The following causes a failed REQUEST SENSE on lun 1 for
	 * seagate controller, which causes SCSI code to reset bus.
	 */
	{"HP", "C1750A", "3226", BLIST_NOLUN},		/* scanjet iic */
	{"HP", "C1790A", "", BLIST_NOLUN},		/* scanjet iip */
	{"HP", "C2500A", "", BLIST_NOLUN},		/* scanjet iicx */
	{"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN},	/* locks up */
	{"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN},	/* responds to all lun */
	{"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN},	/* locks up */
	{"NEC", "D3856", "0009", BLIST_NOLUN},
	{"QUANTUM", "LPS525S", "3110", BLIST_NOLUN},	/* locks up */
	{"QUANTUM", "PD1225S", "3110", BLIST_NOLUN},	/* locks up */
	{"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN},	/* locks up */
	{"RELISYS", "Scorpio", NULL, BLIST_NOLUN},	/* responds to all lun */
	{"SANKYO", "CP525", "6.64", BLIST_NOLUN},	/* causes failed REQ SENSE, extra reset */
	{"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
	{"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
	{"YAMAHA", "CDR100", "1.00", BLIST_NOLUN},	/* locks up */
	{"YAMAHA", "CDR102", "1.00", BLIST_NOLUN},	/* locks up */
	{"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN},	/* locks up */
	{"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN},	/* locks up */
	{"", "Scanner", "1.80", BLIST_NOLUN},	/* responds to all lun */

	/*
	 * Other types of devices that have special flags.
	 * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
	 */
	{"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
	{"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
	{"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
	{"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
	{"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_FORCELUN | BLIST_INQUIRY_36},
	{"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
	{"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
	{"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},	/* CMD RAID Controller */
	{"CNSI", "G7324", NULL, BLIST_SPARSELUN},	/* Chaparral G7324 RAID */
	{"CNSi", "G8324", NULL, BLIST_SPARSELUN},	/* Chaparral G8324 RAID */
	{"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN},
	{"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
	{"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
	{"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
	{"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
	{"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
	{"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
	{"DELL", "PV660F", NULL, BLIST_SPARSELUN},
	{"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
	{"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},	/* Dell PV 530F */
	{"DELL", "PV530F", NULL, BLIST_SPARSELUN},
	{"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
	{"DGC", "RAID", NULL, BLIST_SPARSELUN},	/* Dell PV 650F, storage on LUN 0 */
	{"DGC", "DISK", NULL, BLIST_SPARSELUN},	/* Dell PV 650F, no storage on LUN 0 */
	{"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
	{"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
	{"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
	{"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
	{"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
	{"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
	{"HITACHI", "DF400", "*", BLIST_SPARSELUN},
	{"HITACHI", "DF500", "*", BLIST_SPARSELUN},
	{"HITACHI", "DF600", "*", BLIST_SPARSELUN},
	{"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},	/* HP VA7400 */
	{"HP", "OPEN-", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP XP Arrays */
	{"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
	{"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
	{"HP", "C1557A", NULL, BLIST_FORCELUN},
	{"HP", "C3323-300", "4269", BLIST_NOTQ},
	{"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
	{"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
	{"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
	{"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
	{"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
	{"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
	{"INSITE", "I325VM", NULL, BLIST_KEY},
	{"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
	{"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
	{"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
	{"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
	{"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
	{"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
	{"MegaRAID", "LD", NULL, BLIST_FORCELUN},
	{"MICROP", "4110", NULL, BLIST_NOTQ},
	{"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
	{"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
	{"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
	{"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
	{"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
	{"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
	{"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
	{"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
	{"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
	{"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
	{"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
	{"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
	{"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
	{"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},	/* Chokes on tagged INQUIRY */
	{"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
	{"SGI", "RAID3", "*", BLIST_SPARSELUN},
	{"SGI", "RAID5", "*", BLIST_SPARSELUN},
	{"SGI", "TP9100", "*", BLIST_REPORTLUN2},
	{"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
	{"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
	{"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
	{"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
	{"SONY", "TSL", NULL, BLIST_FORCELUN},		/* DDS3 & DDS4 autoloaders */
	{"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
	{"SUN", "T300", "*", BLIST_SPARSELUN},
	{"SUN", "T4", "*", BLIST_SPARSELUN},
	{"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
	{"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
	{"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
	{"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
	{"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
	{"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
	{"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
	{"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
	{"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
	{"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
	{"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
	{ NULL, NULL, NULL, 0 },
};

/*
 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 * devinfo vendor and model strings.
 */
static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
				char *from, int compatible)
{
	size_t from_length;

	from_length = strlen(from);
	strncpy(to, from, min(to_length, from_length));
	if (from_length < to_length) {
		if (compatible) {
			/*
			 * NUL terminate the string if it is short.
			 */
			to[from_length] = '\0';
		} else {
			/* 
			 * space pad the string if it is short. 
			 */
			strncpy(&to[from_length], spaces,
				to_length - from_length);
		}
	}
	if (from_length > to_length)
		 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
			__FUNCTION__, name, from);
}

/**
 * scsi_dev_info_list_add: add one dev_info list entry.
 * @vendor:	vendor string
 * @model:	model (product) string
 * @strflags:	integer string
 * @flag:	if strflags NULL, use this flag value
 *
 * Description:
 * 	Create and add one dev_info entry for @vendor, @model, @strflags or
 * 	@flag. If @compatible, add to the tail of the list, do not space
 * 	pad, and set devinfo->compatible. The scsi_static_device_list entries
 * 	are added with @compatible 1 and @clfags NULL.
 *
 * Returns: 0 OK, -error on failure.
 **/
static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
			    char *strflags, int flags)
{
	struct scsi_dev_info_list *devinfo;

	devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
	if (!devinfo) {
		printk(KERN_ERR "%s: no memory\n", __FUNCTION__);
		return -ENOMEM;
	}

	scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
			    vendor, compatible);
	scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
			    model, compatible);

	if (strflags)
		devinfo->flags = simple_strtoul(strflags, NULL, 0);
	else
		devinfo->flags = flags;

	devinfo->compatible = compatible;

	if (compatible)
		list_add_tail(&devinfo->dev_info_list, &scsi_dev_info_list);
	else
		list_add(&devinfo->dev_info_list, &scsi_dev_info_list);

	return 0;
}

/**
 * scsi_dev_info_list_add_str: parse dev_list and add to the
 * scsi_dev_info_list.
 * @dev_list:	string of device flags to add
 *
 * Description:
 * 	Parse dev_list, and add entries to the scsi_dev_info_list.
 * 	dev_list is of the form "vendor:product:flag,vendor:product:flag".
 * 	dev_list is modified via strsep. Can be called for command line
 * 	addition, for proc or mabye a sysfs interface.
 *
 * Returns: 0 if OK, -error on failure.
 **/
static int scsi_dev_info_list_add_str(char *dev_list)
{
	char *vendor, *model, *strflags, *next;
	char *next_check;
	int res = 0;

	next = dev_list;
	if (next && next[0] == '"') {
		/*
		 * Ignore both the leading and trailing quote.
		 */
		next++;
		next_check = ",\"";
	} else {
		next_check = ",";
	}

	/*
	 * For the leading and trailing '"' case, the for loop comes
	 * through the last time with vendor[0] == '\0'.
	 */
	for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
	     && (res == 0); vendor = strsep(&next, ":")) {
		strflags = NULL;
		model = strsep(&next, ":");
		if (model)
			strflags = strsep(&next, next_check);
		if (!model || !strflags) {
			printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
			       " '%s'\n", __FUNCTION__, vendor, model,
			       strflags);
			res = -EINVAL;
		} else
			res = scsi_dev_info_list_add(0 /* compatible */, vendor,
						     model, strflags, 0);
	}
	return res;
}

/**
 * get_device_flags - get device specific flags from the dynamic device
 * list. Called during scan time.
 * @vendor:	vendor name
 * @model:	model name
 *
 * Description:
 *     Search the scsi_dev_info_list for an entry matching @vendor and
 *     @model, if found, return the matching flags value, else return
 *     the host or global default settings.
 **/
int scsi_get_device_flags(struct scsi_device *sdev,
			  const unsigned char *vendor,
			  const unsigned char *model)
{
	struct scsi_dev_info_list *devinfo;
	unsigned int bflags;

	bflags = sdev->sdev_bflags;
	if (!bflags)
		bflags = scsi_default_dev_flags;

	list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
		if (devinfo->compatible) {
			/*
			 * Behave like the older version of get_device_flags.
			 */
			size_t max;
			/*
			 * XXX why skip leading spaces? If an odd INQUIRY
			 * value, that should have been part of the
			 * scsi_static_device_list[] entry, such as "  FOO"
			 * rather than "FOO". Since this code is already
			 * here, and we don't know what device it is
			 * trying to work with, leave it as-is.
			 */
			max = 8;	/* max length of vendor */
			while ((max > 0) && *vendor == ' ') {
				max--;
				vendor++;
			}
			/*
			 * XXX removing the following strlen() would be
			 * good, using it means that for a an entry not in
			 * the list, we scan every byte of every vendor
			 * listed in scsi_static_device_list[], and never match
			 * a single one (and still have to compare at
			 * least the first byte of each vendor).
			 */
			if (memcmp(devinfo->vendor, vendor,
				    min(max, strlen(devinfo->vendor))))
				continue;
			/*
			 * Skip spaces again.
			 */
			max = 16;	/* max length of model */
			while ((max > 0) && *model == ' ') {
				max--;
				model++;
			}
			if (memcmp(devinfo->model, model,
				   min(max, strlen(devinfo->model))))
				continue;
			return devinfo->flags;
		} else {
			if (!memcmp(devinfo->vendor, vendor,
				     sizeof(devinfo->vendor)) &&
			     !memcmp(devinfo->model, model,
				      sizeof(devinfo->model)))
				return devinfo->flags;
		}
	}
	return bflags;
}

#ifdef CONFIG_SCSI_PROC_FS
/* 
 * proc_scsi_dev_info_read: dump the scsi_dev_info_list via
 * /proc/scsi/device_info
 */
static int proc_scsi_devinfo_read(char *buffer, char **start,
				  off_t offset, int length)
{
	struct scsi_dev_info_list *devinfo;
	int size, len = 0;
	off_t begin = 0;
	off_t pos = 0;

	list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
		size = sprintf(buffer + len, "'%.8s' '%.16s' 0x%x\n",
			devinfo->vendor, devinfo->model, devinfo->flags);
		len += size;
		pos = begin + len;
		if (pos < offset) {
			len = 0;
			begin = pos;
		}
		if (pos > offset + length)
			goto stop_output;
	}

stop_output:
	*start = buffer + (offset - begin);	/* Start of wanted data */
	len -= (offset - begin);	/* Start slop */
	if (len > length)
		len = length;	/* Ending slop */
	return (len);
}

/* 
 * proc_scsi_dev_info_write: allow additions to the scsi_dev_info_list via
 * /proc.
 *
 * Use: echo "vendor:model:flag" > /proc/scsi/device_info
 *
 * To add a black/white list entry for vendor and model with an integer
 * value of flag to the scsi device info list.
 */
static int proc_scsi_devinfo_write(struct file *file, const char __user *buf,
				   unsigned long length, void *data)
{
	char *buffer;
	int err = length;

	if (!buf || length>PAGE_SIZE)
		return -EINVAL;
	if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
		return -ENOMEM;
	if (copy_from_user(buffer, buf, length)) {
		err =-EFAULT;
		goto out;
	}

	if (length < PAGE_SIZE)
		buffer[length] = '\0';
	else if (buffer[PAGE_SIZE-1]) {
		err = -EINVAL;
		goto out;
	}

	scsi_dev_info_list_add_str(buffer);

out:
	free_page((unsigned long)buffer);
	return err;
}
#endif /* CONFIG_SCSI_PROC_FS */

module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
MODULE_PARM_DESC(dev_flags,
	 "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
	 " list entries for vendor and model with an integer value of flags"
	 " to the scsi device info list");

module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(default_dev_flags,
		 "scsi default device flag integer value");

/**
 * scsi_dev_info_list_delete: called from scsi.c:exit_scsi to remove
 * 	the scsi_dev_info_list.
 **/
void scsi_exit_devinfo(void)
{
	struct list_head *lh, *lh_next;
	struct scsi_dev_info_list *devinfo;

#ifdef CONFIG_SCSI_PROC_FS
	remove_proc_entry("scsi/device_info", NULL);
#endif

	list_for_each_safe(lh, lh_next, &scsi_dev_info_list) {
		devinfo = list_entry(lh, struct scsi_dev_info_list,
				     dev_info_list);
		kfree(devinfo);
	}
}

/**
 * scsi_dev_list_init: set up the dynamic device list.
 * @dev_list:	string of device flags to add
 *
 * Description:
 * 	Add command line @dev_list entries, then add
 * 	scsi_static_device_list entries to the scsi device info list.
 **/
int __init scsi_init_devinfo(void)
{
#ifdef CONFIG_SCSI_PROC_FS
	struct proc_dir_entry *p;
#endif
	int error, i;

	error = scsi_dev_info_list_add_str(scsi_dev_flags);
	if (error)
		return error;

	for (i = 0; scsi_static_device_list[i].vendor; i++) {
		error = scsi_dev_info_list_add(1 /* compatibile */,
				scsi_static_device_list[i].vendor,
				scsi_static_device_list[i].model,
				NULL,
				scsi_static_device_list[i].flags);
		if (error)
			goto out;
	}

#ifdef CONFIG_SCSI_PROC_FS
	p = create_proc_entry("scsi/device_info", 0, NULL);
	if (!p) {
		error = -ENOMEM;
		goto out;
	}

	p->owner = THIS_MODULE;
	p->get_info = proc_scsi_devinfo_read;
	p->write_proc = proc_scsi_devinfo_write;
#endif /* CONFIG_SCSI_PROC_FS */

 out:
	if (error)
		scsi_exit_devinfo();
	return error;
}