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Merge ../scsi-rc-fixes-2.6
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / scsi_devinfo.c
blobae13e4a78d515205b37aedc406484cb40f8aef9c
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", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
136 BLIST_MAX_512 | BLIST_REPORTLUN2}, /* Compaq RA4x00 */
137 {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
138 {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
139 {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
140 {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
141 {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
142 {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
143 {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
144 {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
145 {"DELL", "PV660F PSEUDO", NULL, BLIST_SPARSELUN},
146 {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN}, /* Dell PV 530F */
147 {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
148 {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
149 {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
150 {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
151 {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
152 {"EMULEX", "MD21/S2 ESDI", NULL, BLIST_SINGLELUN},
153 {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
154 {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
155 {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
156 {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
157 {"HITACHI", "DF400", "*", BLIST_SPARSELUN},
158 {"HITACHI", "DF500", "*", BLIST_SPARSELUN},
159 {"HITACHI", "DF600", "*", BLIST_SPARSELUN},
160 {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
161 {"HITACHI", "OPEN-E", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
162 {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP VA7400 */
163 {"HP", "OPEN-", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP XP Arrays */
164 {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
165 {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
166 {"HP", "C1557A", NULL, BLIST_FORCELUN},
167 {"HP", "C3323-300", "4269", BLIST_NOTQ},
168 {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
169 {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
170 {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
171 {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
172 {"IOMEGA", "Io20S *F", NULL, BLIST_KEY},
173 {"INSITE", "Floptical F*8I", NULL, BLIST_KEY},
174 {"INSITE", "I325VM", NULL, BLIST_KEY},
175 {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
176 {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
177 {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
178 {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
179 {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
180 {"Medion", "Flash XL MMC/SD", "2.6D", BLIST_FORCELUN},
181 {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
182 {"MICROP", "4110", NULL, BLIST_NOTQ},
183 {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
184 {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
185 {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
186 {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
187 {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
188 {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
189 {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
190 {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
191 {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
192 {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
193 {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
194 {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
195 {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
196 {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ}, /* Chokes on tagged INQUIRY */
197 {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
198 {"SGI", "RAID3", "*", BLIST_SPARSELUN},
199 {"SGI", "RAID5", "*", BLIST_SPARSELUN},
200 {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
201 {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
202 {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
203 {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
204 {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
205 {"SONY", "TSL", NULL, BLIST_FORCELUN}, /* DDS3 & DDS4 autoloaders */
206 {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
207 {"SUN", "T300", "*", BLIST_SPARSELUN},
208 {"SUN", "T4", "*", BLIST_SPARSELUN},
209 {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
210 {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
211 {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
212 {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
213 {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
214 {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
215 {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
216 {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
217 {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
218 {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
219 {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
220 { NULL, NULL, NULL, 0 },
221 };
222
223 /*
224 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
225 * devinfo vendor and model strings.
226 */
227 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
228 char *from, int compatible)
229 {
230 size_t from_length;
231
232 from_length = strlen(from);
233 strncpy(to, from, min(to_length, from_length));
234 if (from_length < to_length) {
235 if (compatible) {
236 /*
237 * NUL terminate the string if it is short.
238 */
239 to[from_length] = '\0';
240 } else {
241 /*
242 * space pad the string if it is short.
243 */
244 strncpy(&to[from_length], spaces,
245 to_length - from_length);
246 }
247 }
248 if (from_length > to_length)
249 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
250 __FUNCTION__, name, from);
251 }
252
253 /**
254 * scsi_dev_info_list_add: add one dev_info list entry.
255 * @vendor: vendor string
256 * @model: model (product) string
257 * @strflags: integer string
258 * @flag: if strflags NULL, use this flag value
259 *
260 * Description:
261 * Create and add one dev_info entry for @vendor, @model, @strflags or
262 * @flag. If @compatible, add to the tail of the list, do not space
263 * pad, and set devinfo->compatible. The scsi_static_device_list entries
264 * are added with @compatible 1 and @clfags NULL.
265 *
266 * Returns: 0 OK, -error on failure.
267 **/
268 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
269 char *strflags, int flags)
270 {
271 struct scsi_dev_info_list *devinfo;
272
273 devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
274 if (!devinfo) {
275 printk(KERN_ERR "%s: no memory\n", __FUNCTION__);
276 return -ENOMEM;
277 }
278
279 scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
280 vendor, compatible);
281 scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
282 model, compatible);
283
284 if (strflags)
285 devinfo->flags = simple_strtoul(strflags, NULL, 0);
286 else
287 devinfo->flags = flags;
288
289 devinfo->compatible = compatible;
290
291 if (compatible)
292 list_add_tail(&devinfo->dev_info_list, &scsi_dev_info_list);
293 else
294 list_add(&devinfo->dev_info_list, &scsi_dev_info_list);
295
296 return 0;
297 }
298
299 /**
300 * scsi_dev_info_list_add_str: parse dev_list and add to the
301 * scsi_dev_info_list.
302 * @dev_list: string of device flags to add
303 *
304 * Description:
305 * Parse dev_list, and add entries to the scsi_dev_info_list.
306 * dev_list is of the form "vendor:product:flag,vendor:product:flag".
307 * dev_list is modified via strsep. Can be called for command line
308 * addition, for proc or mabye a sysfs interface.
309 *
310 * Returns: 0 if OK, -error on failure.
311 **/
312 static int scsi_dev_info_list_add_str(char *dev_list)
313 {
314 char *vendor, *model, *strflags, *next;
315 char *next_check;
316 int res = 0;
317
318 next = dev_list;
319 if (next && next[0] == '"') {
320 /*
321 * Ignore both the leading and trailing quote.
322 */
323 next++;
324 next_check = ",\"";
325 } else {
326 next_check = ",";
327 }
328
329 /*
330 * For the leading and trailing '"' case, the for loop comes
331 * through the last time with vendor[0] == '\0'.
332 */
333 for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
334 && (res == 0); vendor = strsep(&next, ":")) {
335 strflags = NULL;
336 model = strsep(&next, ":");
337 if (model)
338 strflags = strsep(&next, next_check);
339 if (!model || !strflags) {
340 printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
341 " '%s'\n", __FUNCTION__, vendor, model,
342 strflags);
343 res = -EINVAL;
344 } else
345 res = scsi_dev_info_list_add(0 /* compatible */, vendor,
346 model, strflags, 0);
347 }
348 return res;
349 }
350
351 /**
352 * get_device_flags - get device specific flags from the dynamic device
353 * list. Called during scan time.
354 * @vendor: vendor name
355 * @model: model name
356 *
357 * Description:
358 * Search the scsi_dev_info_list for an entry matching @vendor and
359 * @model, if found, return the matching flags value, else return
360 * the host or global default settings.
361 **/
362 int scsi_get_device_flags(struct scsi_device *sdev,
363 const unsigned char *vendor,
364 const unsigned char *model)
365 {
366 struct scsi_dev_info_list *devinfo;
367 unsigned int bflags;
368
369 bflags = sdev->sdev_bflags;
370 if (!bflags)
371 bflags = scsi_default_dev_flags;
372
373 list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
374 if (devinfo->compatible) {
375 /*
376 * Behave like the older version of get_device_flags.
377 */
378 size_t max;
379 /*
380 * XXX why skip leading spaces? If an odd INQUIRY
381 * value, that should have been part of the
382 * scsi_static_device_list[] entry, such as " FOO"
383 * rather than "FOO". Since this code is already
384 * here, and we don't know what device it is
385 * trying to work with, leave it as-is.
386 */
387 max = 8; /* max length of vendor */
388 while ((max > 0) && *vendor == ' ') {
389 max--;
390 vendor++;
391 }
392 /*
393 * XXX removing the following strlen() would be
394 * good, using it means that for a an entry not in
395 * the list, we scan every byte of every vendor
396 * listed in scsi_static_device_list[], and never match
397 * a single one (and still have to compare at
398 * least the first byte of each vendor).
399 */
400 if (memcmp(devinfo->vendor, vendor,
401 min(max, strlen(devinfo->vendor))))
402 continue;
403 /*
404 * Skip spaces again.
405 */
406 max = 16; /* max length of model */
407 while ((max > 0) && *model == ' ') {
408 max--;
409 model++;
410 }
411 if (memcmp(devinfo->model, model,
412 min(max, strlen(devinfo->model))))
413 continue;
414 return devinfo->flags;
415 } else {
416 if (!memcmp(devinfo->vendor, vendor,
417 sizeof(devinfo->vendor)) &&
418 !memcmp(devinfo->model, model,
419 sizeof(devinfo->model)))
420 return devinfo->flags;
421 }
422 }
423 return bflags;
424 }
425
426 #ifdef CONFIG_SCSI_PROC_FS
427 /*
428 * proc_scsi_dev_info_read: dump the scsi_dev_info_list via
429 * /proc/scsi/device_info
430 */
431 static int proc_scsi_devinfo_read(char *buffer, char **start,
432 off_t offset, int length)
433 {
434 struct scsi_dev_info_list *devinfo;
435 int size, len = 0;
436 off_t begin = 0;
437 off_t pos = 0;
438
439 list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
440 size = sprintf(buffer + len, "'%.8s' '%.16s' 0x%x\n",
441 devinfo->vendor, devinfo->model, devinfo->flags);
442 len += size;
443 pos = begin + len;
444 if (pos < offset) {
445 len = 0;
446 begin = pos;
447 }
448 if (pos > offset + length)
449 goto stop_output;
450 }
451
452 stop_output:
453 *start = buffer + (offset - begin); /* Start of wanted data */
454 len -= (offset - begin); /* Start slop */
455 if (len > length)
456 len = length; /* Ending slop */
457 return (len);
458 }
459
460 /*
461 * proc_scsi_dev_info_write: allow additions to the scsi_dev_info_list via
462 * /proc.
463 *
464 * Use: echo "vendor:model:flag" > /proc/scsi/device_info
465 *
466 * To add a black/white list entry for vendor and model with an integer
467 * value of flag to the scsi device info list.
468 */
469 static int proc_scsi_devinfo_write(struct file *file, const char __user *buf,
470 unsigned long length, void *data)
471 {
472 char *buffer;
473 int err = length;
474
475 if (!buf || length>PAGE_SIZE)
476 return -EINVAL;
477 if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
478 return -ENOMEM;
479 if (copy_from_user(buffer, buf, length)) {
480 err =-EFAULT;
481 goto out;
482 }
483
484 if (length < PAGE_SIZE)
485 buffer[length] = '\0';
486 else if (buffer[PAGE_SIZE-1]) {
487 err = -EINVAL;
488 goto out;
489 }
490
491 scsi_dev_info_list_add_str(buffer);
492
493 out:
494 free_page((unsigned long)buffer);
495 return err;
496 }
497 #endif /* CONFIG_SCSI_PROC_FS */
498
499 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
500 MODULE_PARM_DESC(dev_flags,
501 "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
502 " list entries for vendor and model with an integer value of flags"
503 " to the scsi device info list");
504
505 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
506 MODULE_PARM_DESC(default_dev_flags,
507 "scsi default device flag integer value");
508
509 /**
510 * scsi_dev_info_list_delete: called from scsi.c:exit_scsi to remove
511 * the scsi_dev_info_list.
512 **/
513 void scsi_exit_devinfo(void)
514 {
515 struct list_head *lh, *lh_next;
516 struct scsi_dev_info_list *devinfo;
517
518 #ifdef CONFIG_SCSI_PROC_FS
519 remove_proc_entry("scsi/device_info", NULL);
520 #endif
521
522 list_for_each_safe(lh, lh_next, &scsi_dev_info_list) {
523 devinfo = list_entry(lh, struct scsi_dev_info_list,
524 dev_info_list);
525 kfree(devinfo);
526 }
527 }
528
529 /**
530 * scsi_dev_list_init: set up the dynamic device list.
531 * @dev_list: string of device flags to add
532 *
533 * Description:
534 * Add command line @dev_list entries, then add
535 * scsi_static_device_list entries to the scsi device info list.
536 **/
537 int __init scsi_init_devinfo(void)
538 {
539 #ifdef CONFIG_SCSI_PROC_FS
540 struct proc_dir_entry *p;
541 #endif
542 int error, i;
543
544 error = scsi_dev_info_list_add_str(scsi_dev_flags);
545 if (error)
546 return error;
547
548 for (i = 0; scsi_static_device_list[i].vendor; i++) {
549 error = scsi_dev_info_list_add(1 /* compatibile */,
550 scsi_static_device_list[i].vendor,
551 scsi_static_device_list[i].model,
552 NULL,
553 scsi_static_device_list[i].flags);
554 if (error)
555 goto out;
556 }
557
558 #ifdef CONFIG_SCSI_PROC_FS
559 p = create_proc_entry("scsi/device_info", 0, NULL);
560 if (!p) {
561 error = -ENOMEM;
562 goto out;
563 }
564
565 p->owner = THIS_MODULE;
566 p->get_info = proc_scsi_devinfo_read;
567 p->write_proc = proc_scsi_devinfo_write;
568 #endif /* CONFIG_SCSI_PROC_FS */
569
570 out:
571 if (error)
572 scsi_exit_devinfo();
573 return error;
574 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree