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[SCSI] BLIST_ATTACH_PQ3 flags
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / scsi_devinfo.c
blob6f46b338c991a99bd1640edeaa251f69cab47ee3
1
2 #include <linux/blkdev.h>
3 #include <linux/init.h>
4 #include <linux/kernel.h>
5 #include <linux/module.h>
6 #include <linux/moduleparam.h>
7 #include <linux/proc_fs.h>
8 #include <linux/seq_file.h>
9
10 #include <scsi/scsi_device.h>
11 #include <scsi/scsi_devinfo.h>
12
13 #include "scsi_priv.h"
14
15
16 /*
17 * scsi_dev_info_list: structure to hold black/white listed devices.
18 */
19 struct scsi_dev_info_list {
20 struct list_head dev_info_list;
21 char vendor[8];
22 char model[16];
23 unsigned flags;
24 unsigned compatible; /* for use with scsi_static_device_list entries */
25 };
26
27
28 static const char spaces[] = " "; /* 16 of them */
29 static unsigned scsi_default_dev_flags;
30 static LIST_HEAD(scsi_dev_info_list);
31 static char scsi_dev_flags[256];
32
33 /*
34 * scsi_static_device_list: deprecated list of devices that require
35 * settings that differ from the default, includes black-listed (broken)
36 * devices. The entries here are added to the tail of scsi_dev_info_list
37 * via scsi_dev_info_list_init.
38 *
39 * Do not add to this list, use the command line or proc interface to add
40 * to the scsi_dev_info_list. This table will eventually go away.
41 */
42 static struct {
43 char *vendor;
44 char *model;
45 char *revision; /* revision known to be bad, unused */
46 unsigned flags;
47 } scsi_static_device_list[] __initdata = {
48 /*
49 * The following devices are known not to tolerate a lun != 0 scan
50 * for one reason or another. Some will respond to all luns,
51 * others will lock up.
52 */
53 {"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN}, /* locks up */
54 {"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN}, /* locks up */
55 {"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN}, /* locks up */
56 {"DENON", "DRD-25X", "V", BLIST_NOLUN}, /* locks up */
57 {"HITACHI", "DK312C", "CM81", BLIST_NOLUN}, /* responds to all lun */
58 {"HITACHI", "DK314C", "CR21", BLIST_NOLUN}, /* responds to all lun */
59 {"IMS", "CDD521/10", "2.06", BLIST_NOLUN}, /* locks up */
60 {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN}, /* locks up */
61 {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN}, /* locks up */
62 {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN}, /* locks up */
63 {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN}, /* locks up */
64 {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN}, /* locks up */
65 {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN}, /* responds to all lun */
66 {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN}, /* responds to all lun */
67 {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
68 {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN}, /* responds to all lun */
69 {"RODIME", "RO3000S", "2.33", BLIST_NOLUN}, /* locks up */
70 {"SUN", "SENA", NULL, BLIST_NOLUN}, /* responds to all luns */
71 /*
72 * The following causes a failed REQUEST SENSE on lun 1 for
73 * aha152x controller, which causes SCSI code to reset bus.
74 */
75 {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
76 /*
77 * The following causes a failed REQUEST SENSE on lun 1 for
78 * aha152x controller, which causes SCSI code to reset bus.
79 */
80 {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
81 {"SEAGATE", "ST296", "921", BLIST_NOLUN}, /* responds to all lun */
82 {"SEAGATE", "ST1581", "6538", BLIST_NOLUN}, /* responds to all lun */
83 {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
84 {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
85 {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
86 {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
87 {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
88 {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN}, /* locks up */
89 {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN}, /* locks up */
90 /*
91 * The following causes a failed REQUEST SENSE on lun 1 for
92 * seagate controller, which causes SCSI code to reset bus.
93 */
94 {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
95 {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN}, /* responds to all lun */
96 /*
97 * The following causes a failed REQUEST SENSE on lun 1 for
98 * seagate controller, which causes SCSI code to reset bus.
99 */
100 {"HP", "C1750A", "3226", BLIST_NOLUN}, /* scanjet iic */
101 {"HP", "C1790A", "", BLIST_NOLUN}, /* scanjet iip */
102 {"HP", "C2500A", "", BLIST_NOLUN}, /* scanjet iicx */
103 {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
104 {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN}, /* responds to all lun */
105 {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN}, /* locks up */
106 {"NEC", "D3856", "0009", BLIST_NOLUN},
107 {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN}, /* locks up */
108 {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN}, /* locks up */
109 {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN}, /* locks up */
110 {"RELISYS", "Scorpio", NULL, BLIST_NOLUN}, /* responds to all lun */
111 {"SANKYO", "CP525", "6.64", BLIST_NOLUN}, /* causes failed REQ SENSE, extra reset */
112 {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
113 {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
114 {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN}, /* locks up */
115 {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN}, /* locks up */
116 {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN}, /* locks up */
117 {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN}, /* locks up */
118 {"", "Scanner", "1.80", BLIST_NOLUN}, /* responds to all lun */
119
120 /*
121 * Other types of devices that have special flags.
122 * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
123 */
124 {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
125 {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
126 {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
127 {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
128 {"BELKIN", "USB 2 HS-CF", "1.95", BLIST_FORCELUN | BLIST_INQUIRY_36},
129 {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
130 {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
131 {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
132 {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN}, /* CMD RAID Controller */
133 {"CNSI", "G7324", NULL, BLIST_SPARSELUN}, /* Chaparral G7324 RAID */
134 {"CNSi", "G8324", NULL, BLIST_SPARSELUN}, /* Chaparral G8324 RAID */
135 {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN},
136 {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
137 {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
138 {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
139 {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
140 {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
141 {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
142 {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
143 {"DELL", "PV660F PSEUDO", NULL, BLIST_SPARSELUN},
144 {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN}, /* Dell PV 530F */
145 {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
146 {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
147 {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
148 {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
149 {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
150 {"EMULEX", "MD21/S2 ESDI", NULL, BLIST_SINGLELUN},
151 {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
152 {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
153 {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
154 {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
155 {"HITACHI", "DF400", "*", BLIST_SPARSELUN},
156 {"HITACHI", "DF500", "*", BLIST_SPARSELUN},
157 {"HITACHI", "DF600", "*", BLIST_SPARSELUN},
158 {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
159 {"HITACHI", "OPEN-E", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
160 {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP VA7400 */
161 {"HP", "OPEN-", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP XP Arrays */
162 {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
163 {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
164 {"HP", "C1557A", NULL, BLIST_FORCELUN},
165 {"HP", "C3323-300", "4269", BLIST_NOTQ},
166 {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
167 {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
168 {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
169 {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
170 {"IOMEGA", "Io20S *F", NULL, BLIST_KEY},
171 {"INSITE", "Floptical F*8I", NULL, BLIST_KEY},
172 {"INSITE", "I325VM", NULL, BLIST_KEY},
173 {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
174 {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
175 {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
176 {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
177 {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
178 {"Medion", "Flash XL MMC/SD", "2.6D", BLIST_FORCELUN},
179 {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
180 {"MICROP", "4110", NULL, BLIST_NOTQ},
181 {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
182 {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
183 {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
184 {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
185 {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
186 {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
187 {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
188 {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
189 {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
190 {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
191 {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
192 {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
193 {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
194 {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ}, /* Chokes on tagged INQUIRY */
195 {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
196 {"SGI", "RAID3", "*", BLIST_SPARSELUN},
197 {"SGI", "RAID5", "*", BLIST_SPARSELUN},
198 {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
199 {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
200 {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
201 {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
202 {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
203 {"SONY", "TSL", NULL, BLIST_FORCELUN}, /* DDS3 & DDS4 autoloaders */
204 {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
205 {"SUN", "T300", "*", BLIST_SPARSELUN},
206 {"SUN", "T4", "*", BLIST_SPARSELUN},
207 {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
208 {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
209 {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
210 {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
211 {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
212 {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
213 {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
214 {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
215 {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
216 {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
217 {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
218 { NULL, NULL, NULL, 0 },
219 };
220
221 /*
222 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
223 * devinfo vendor and model strings.
224 */
225 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
226 char *from, int compatible)
227 {
228 size_t from_length;
229
230 from_length = strlen(from);
231 strncpy(to, from, min(to_length, from_length));
232 if (from_length < to_length) {
233 if (compatible) {
234 /*
235 * NUL terminate the string if it is short.
236 */
237 to[from_length] = '\0';
238 } else {
239 /*
240 * space pad the string if it is short.
241 */
242 strncpy(&to[from_length], spaces,
243 to_length - from_length);
244 }
245 }
246 if (from_length > to_length)
247 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
248 __FUNCTION__, name, from);
249 }
250
251 /**
252 * scsi_dev_info_list_add: add one dev_info list entry.
253 * @vendor: vendor string
254 * @model: model (product) string
255 * @strflags: integer string
256 * @flag: if strflags NULL, use this flag value
257 *
258 * Description:
259 * Create and add one dev_info entry for @vendor, @model, @strflags or
260 * @flag. If @compatible, add to the tail of the list, do not space
261 * pad, and set devinfo->compatible. The scsi_static_device_list entries
262 * are added with @compatible 1 and @clfags NULL.
263 *
264 * Returns: 0 OK, -error on failure.
265 **/
266 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
267 char *strflags, int flags)
268 {
269 struct scsi_dev_info_list *devinfo;
270
271 devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
272 if (!devinfo) {
273 printk(KERN_ERR "%s: no memory\n", __FUNCTION__);
274 return -ENOMEM;
275 }
276
277 scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
278 vendor, compatible);
279 scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
280 model, compatible);
281
282 if (strflags)
283 devinfo->flags = simple_strtoul(strflags, NULL, 0);
284 else
285 devinfo->flags = flags;
286
287 devinfo->compatible = compatible;
288
289 if (compatible)
290 list_add_tail(&devinfo->dev_info_list, &scsi_dev_info_list);
291 else
292 list_add(&devinfo->dev_info_list, &scsi_dev_info_list);
293
294 return 0;
295 }
296
297 /**
298 * scsi_dev_info_list_add_str: parse dev_list and add to the
299 * scsi_dev_info_list.
300 * @dev_list: string of device flags to add
301 *
302 * Description:
303 * Parse dev_list, and add entries to the scsi_dev_info_list.
304 * dev_list is of the form "vendor:product:flag,vendor:product:flag".
305 * dev_list is modified via strsep. Can be called for command line
306 * addition, for proc or mabye a sysfs interface.
307 *
308 * Returns: 0 if OK, -error on failure.
309 **/
310 static int scsi_dev_info_list_add_str(char *dev_list)
311 {
312 char *vendor, *model, *strflags, *next;
313 char *next_check;
314 int res = 0;
315
316 next = dev_list;
317 if (next && next[0] == '"') {
318 /*
319 * Ignore both the leading and trailing quote.
320 */
321 next++;
322 next_check = ",\"";
323 } else {
324 next_check = ",";
325 }
326
327 /*
328 * For the leading and trailing '"' case, the for loop comes
329 * through the last time with vendor[0] == '\0'.
330 */
331 for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
332 && (res == 0); vendor = strsep(&next, ":")) {
333 strflags = NULL;
334 model = strsep(&next, ":");
335 if (model)
336 strflags = strsep(&next, next_check);
337 if (!model || !strflags) {
338 printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
339 " '%s'\n", __FUNCTION__, vendor, model,
340 strflags);
341 res = -EINVAL;
342 } else
343 res = scsi_dev_info_list_add(0 /* compatible */, vendor,
344 model, strflags, 0);
345 }
346 return res;
347 }
348
349 /**
350 * get_device_flags - get device specific flags from the dynamic device
351 * list. Called during scan time.
352 * @vendor: vendor name
353 * @model: model name
354 *
355 * Description:
356 * Search the scsi_dev_info_list for an entry matching @vendor and
357 * @model, if found, return the matching flags value, else return
358 * the host or global default settings.
359 **/
360 int scsi_get_device_flags(struct scsi_device *sdev,
361 const unsigned char *vendor,
362 const unsigned char *model)
363 {
364 struct scsi_dev_info_list *devinfo;
365 unsigned int bflags;
366
367 bflags = sdev->sdev_bflags;
368 if (!bflags)
369 bflags = scsi_default_dev_flags;
370
371 list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
372 if (devinfo->compatible) {
373 /*
374 * Behave like the older version of get_device_flags.
375 */
376 size_t max;
377 /*
378 * XXX why skip leading spaces? If an odd INQUIRY
379 * value, that should have been part of the
380 * scsi_static_device_list[] entry, such as " FOO"
381 * rather than "FOO". Since this code is already
382 * here, and we don't know what device it is
383 * trying to work with, leave it as-is.
384 */
385 max = 8; /* max length of vendor */
386 while ((max > 0) && *vendor == ' ') {
387 max--;
388 vendor++;
389 }
390 /*
391 * XXX removing the following strlen() would be
392 * good, using it means that for a an entry not in
393 * the list, we scan every byte of every vendor
394 * listed in scsi_static_device_list[], and never match
395 * a single one (and still have to compare at
396 * least the first byte of each vendor).
397 */
398 if (memcmp(devinfo->vendor, vendor,
399 min(max, strlen(devinfo->vendor))))
400 continue;
401 /*
402 * Skip spaces again.
403 */
404 max = 16; /* max length of model */
405 while ((max > 0) && *model == ' ') {
406 max--;
407 model++;
408 }
409 if (memcmp(devinfo->model, model,
410 min(max, strlen(devinfo->model))))
411 continue;
412 return devinfo->flags;
413 } else {
414 if (!memcmp(devinfo->vendor, vendor,
415 sizeof(devinfo->vendor)) &&
416 !memcmp(devinfo->model, model,
417 sizeof(devinfo->model)))
418 return devinfo->flags;
419 }
420 }
421 return bflags;
422 }
423
424 #ifdef CONFIG_SCSI_PROC_FS
425 /*
426 * proc_scsi_dev_info_read: dump the scsi_dev_info_list via
427 * /proc/scsi/device_info
428 */
429 static int proc_scsi_devinfo_read(char *buffer, char **start,
430 off_t offset, int length)
431 {
432 struct scsi_dev_info_list *devinfo;
433 int size, len = 0;
434 off_t begin = 0;
435 off_t pos = 0;
436
437 list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
438 size = sprintf(buffer + len, "'%.8s' '%.16s' 0x%x\n",
439 devinfo->vendor, devinfo->model, devinfo->flags);
440 len += size;
441 pos = begin + len;
442 if (pos < offset) {
443 len = 0;
444 begin = pos;
445 }
446 if (pos > offset + length)
447 goto stop_output;
448 }
449
450 stop_output:
451 *start = buffer + (offset - begin); /* Start of wanted data */
452 len -= (offset - begin); /* Start slop */
453 if (len > length)
454 len = length; /* Ending slop */
455 return (len);
456 }
457
458 /*
459 * proc_scsi_dev_info_write: allow additions to the scsi_dev_info_list via
460 * /proc.
461 *
462 * Use: echo "vendor:model:flag" > /proc/scsi/device_info
463 *
464 * To add a black/white list entry for vendor and model with an integer
465 * value of flag to the scsi device info list.
466 */
467 static int proc_scsi_devinfo_write(struct file *file, const char __user *buf,
468 unsigned long length, void *data)
469 {
470 char *buffer;
471 int err = length;
472
473 if (!buf || length>PAGE_SIZE)
474 return -EINVAL;
475 if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
476 return -ENOMEM;
477 if (copy_from_user(buffer, buf, length)) {
478 err =-EFAULT;
479 goto out;
480 }
481
482 if (length < PAGE_SIZE)
483 buffer[length] = '\0';
484 else if (buffer[PAGE_SIZE-1]) {
485 err = -EINVAL;
486 goto out;
487 }
488
489 scsi_dev_info_list_add_str(buffer);
490
491 out:
492 free_page((unsigned long)buffer);
493 return err;
494 }
495 #endif /* CONFIG_SCSI_PROC_FS */
496
497 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
498 MODULE_PARM_DESC(dev_flags,
499 "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
500 " list entries for vendor and model with an integer value of flags"
501 " to the scsi device info list");
502
503 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
504 MODULE_PARM_DESC(default_dev_flags,
505 "scsi default device flag integer value");
506
507 /**
508 * scsi_dev_info_list_delete: called from scsi.c:exit_scsi to remove
509 * the scsi_dev_info_list.
510 **/
511 void scsi_exit_devinfo(void)
512 {
513 struct list_head *lh, *lh_next;
514 struct scsi_dev_info_list *devinfo;
515
516 #ifdef CONFIG_SCSI_PROC_FS
517 remove_proc_entry("scsi/device_info", NULL);
518 #endif
519
520 list_for_each_safe(lh, lh_next, &scsi_dev_info_list) {
521 devinfo = list_entry(lh, struct scsi_dev_info_list,
522 dev_info_list);
523 kfree(devinfo);
524 }
525 }
526
527 /**
528 * scsi_dev_list_init: set up the dynamic device list.
529 * @dev_list: string of device flags to add
530 *
531 * Description:
532 * Add command line @dev_list entries, then add
533 * scsi_static_device_list entries to the scsi device info list.
534 **/
535 int __init scsi_init_devinfo(void)
536 {
537 #ifdef CONFIG_SCSI_PROC_FS
538 struct proc_dir_entry *p;
539 #endif
540 int error, i;
541
542 error = scsi_dev_info_list_add_str(scsi_dev_flags);
543 if (error)
544 return error;
545
546 for (i = 0; scsi_static_device_list[i].vendor; i++) {
547 error = scsi_dev_info_list_add(1 /* compatibile */,
548 scsi_static_device_list[i].vendor,
549 scsi_static_device_list[i].model,
550 NULL,
551 scsi_static_device_list[i].flags);
552 if (error)
553 goto out;
554 }
555
556 #ifdef CONFIG_SCSI_PROC_FS
557 p = create_proc_entry("scsi/device_info", 0, NULL);
558 if (!p) {
559 error = -ENOMEM;
560 goto out;
561 }
562
563 p->owner = THIS_MODULE;
564 p->get_info = proc_scsi_devinfo_read;
565 p->write_proc = proc_scsi_devinfo_write;
566 #endif /* CONFIG_SCSI_PROC_FS */
567
568 out:
569 if (error)
570 scsi_exit_devinfo();
571 return error;
572 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree