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[MIPS] RTLX: Protect rtlx_{read,write} with mutex.
[linux-2.6/linux-mips/linux-dm7025.git] / drivers / scsi / scsi_devinfo.c
blobce63044b1ec8a630711120ea287d73617a922b61
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 {"IBM", "2104-DU3", NULL, BLIST_NOLUN}, /* locks up */
60 {"IBM", "2104-TU3", NULL, BLIST_NOLUN}, /* locks up */
61 {"IMS", "CDD521/10", "2.06", BLIST_NOLUN}, /* locks up */
62 {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN}, /* locks up */
63 {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN}, /* locks up */
64 {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN}, /* locks up */
65 {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN}, /* locks up */
66 {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN}, /* locks up */
67 {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN}, /* responds to all lun */
68 {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN}, /* responds to all lun */
69 {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
70 {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN}, /* responds to all lun */
71 {"RODIME", "RO3000S", "2.33", BLIST_NOLUN}, /* locks up */
72 {"SUN", "SENA", NULL, BLIST_NOLUN}, /* responds to all luns */
73 /*
74 * The following causes a failed REQUEST SENSE on lun 1 for
75 * aha152x controller, which causes SCSI code to reset bus.
76 */
77 {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
78 /*
79 * The following causes a failed REQUEST SENSE on lun 1 for
80 * aha152x controller, which causes SCSI code to reset bus.
81 */
82 {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
83 {"SEAGATE", "ST296", "921", BLIST_NOLUN}, /* responds to all lun */
84 {"SEAGATE", "ST1581", "6538", BLIST_NOLUN}, /* responds to all lun */
85 {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
86 {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
87 {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
88 {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
89 {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
90 {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN}, /* locks up */
91 {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN}, /* locks up */
92 /*
93 * The following causes a failed REQUEST SENSE on lun 1 for
94 * seagate controller, which causes SCSI code to reset bus.
95 */
96 {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
97 {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN}, /* responds to all lun */
98 /*
99 * The following causes a failed REQUEST SENSE on lun 1 for
100 * seagate controller, which causes SCSI code to reset bus.
101 */
102 {"HP", "C1750A", "3226", BLIST_NOLUN}, /* scanjet iic */
103 {"HP", "C1790A", "", BLIST_NOLUN}, /* scanjet iip */
104 {"HP", "C2500A", "", BLIST_NOLUN}, /* scanjet iicx */
105 {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
106 {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN}, /* responds to all lun */
107 {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN}, /* locks up */
108 {"NEC", "D3856", "0009", BLIST_NOLUN},
109 {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN}, /* locks up */
110 {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN}, /* locks up */
111 {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN}, /* locks up */
112 {"RELISYS", "Scorpio", NULL, BLIST_NOLUN}, /* responds to all lun */
113 {"SANKYO", "CP525", "6.64", BLIST_NOLUN}, /* causes failed REQ SENSE, extra reset */
114 {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
115 {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
116 {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN}, /* locks up */
117 {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN}, /* locks up */
118 {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN}, /* locks up */
119 {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN}, /* locks up */
120 {"", "Scanner", "1.80", BLIST_NOLUN}, /* responds to all lun */
121
122 /*
123 * Other types of devices that have special flags.
124 * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
125 */
126 {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
127 {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
128 {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
129 {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
130 {"BELKIN", "USB 2 HS-CF", "1.95", BLIST_FORCELUN | BLIST_INQUIRY_36},
131 {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
132 {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
133 {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
134 {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN}, /* CMD RAID Controller */
135 {"CNSI", "G7324", NULL, BLIST_SPARSELUN}, /* Chaparral G7324 RAID */
136 {"CNSi", "G8324", NULL, BLIST_SPARSELUN}, /* Chaparral G8324 RAID */
137 {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
138 BLIST_MAX_512 | BLIST_REPORTLUN2}, /* Compaq RA4x00 */
139 {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
140 {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
141 {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
142 {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
143 {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
144 {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
145 {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
146 {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
147 {"DELL", "PV660F PSEUDO", NULL, BLIST_SPARSELUN},
148 {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN}, /* Dell PV 530F */
149 {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
150 {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
151 {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
152 {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
153 {"EMC", "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
154 {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
155 {"EMULEX", "MD21/S2 ESDI", NULL, BLIST_SINGLELUN},
156 {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
157 {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
158 {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
159 {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
160 {"HITACHI", "DF400", "*", BLIST_SPARSELUN},
161 {"HITACHI", "DF500", "*", BLIST_SPARSELUN},
162 {"HITACHI", "DF600", "*", BLIST_SPARSELUN},
163 {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
164 {"HITACHI", "OPEN-E", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
165 {"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
166 {"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
167 {"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
168 {"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
169 {"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
170 {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP VA7400 */
171 {"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
172 {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
173 {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
174 {"HP", "C1557A", NULL, BLIST_FORCELUN},
175 {"HP", "C3323-300", "4269", BLIST_NOTQ},
176 {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
177 {"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
178 {"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
179 {"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
180 {"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
181 {"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
182 {"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
183 {"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
184 {"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
185 {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
186 {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
187 {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
188 {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
189 {"IOMEGA", "Io20S *F", NULL, BLIST_KEY},
190 {"INSITE", "Floptical F*8I", NULL, BLIST_KEY},
191 {"INSITE", "I325VM", NULL, BLIST_KEY},
192 {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
193 {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
194 {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
195 {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
196 {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
197 {"Medion", "Flash XL MMC/SD", "2.6D", BLIST_FORCELUN},
198 {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
199 {"MICROP", "4110", NULL, BLIST_NOTQ},
200 {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
201 {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
202 {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
203 {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
204 {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
205 {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
206 {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
207 {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
208 {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
209 {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
210 {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
211 {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
212 {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
213 {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
214 {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ}, /* Chokes on tagged INQUIRY */
215 {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
216 {"SGI", "RAID3", "*", BLIST_SPARSELUN},
217 {"SGI", "RAID5", "*", BLIST_SPARSELUN},
218 {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
219 {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
220 {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
221 {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
222 {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
223 {"SONY", "TSL", NULL, BLIST_FORCELUN}, /* DDS3 & DDS4 autoloaders */
224 {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
225 {"SUN", "T300", "*", BLIST_SPARSELUN},
226 {"SUN", "T4", "*", BLIST_SPARSELUN},
227 {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
228 {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
229 {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
230 {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
231 {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
232 {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
233 {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
234 {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
235 {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
236 {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
237 {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
238 {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
239 { NULL, NULL, NULL, 0 },
240 };
241
242 /*
243 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
244 * devinfo vendor and model strings.
245 */
246 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
247 char *from, int compatible)
248 {
249 size_t from_length;
250
251 from_length = strlen(from);
252 strncpy(to, from, min(to_length, from_length));
253 if (from_length < to_length) {
254 if (compatible) {
255 /*
256 * NUL terminate the string if it is short.
257 */
258 to[from_length] = '\0';
259 } else {
260 /*
261 * space pad the string if it is short.
262 */
263 strncpy(&to[from_length], spaces,
264 to_length - from_length);
265 }
266 }
267 if (from_length > to_length)
268 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
269 __FUNCTION__, name, from);
270 }
271
272 /**
273 * scsi_dev_info_list_add: add one dev_info list entry.
274 * @vendor: vendor string
275 * @model: model (product) string
276 * @strflags: integer string
277 * @flag: if strflags NULL, use this flag value
278 *
279 * Description:
280 * Create and add one dev_info entry for @vendor, @model, @strflags or
281 * @flag. If @compatible, add to the tail of the list, do not space
282 * pad, and set devinfo->compatible. The scsi_static_device_list entries
283 * are added with @compatible 1 and @clfags NULL.
284 *
285 * Returns: 0 OK, -error on failure.
286 **/
287 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
288 char *strflags, int flags)
289 {
290 struct scsi_dev_info_list *devinfo;
291
292 devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
293 if (!devinfo) {
294 printk(KERN_ERR "%s: no memory\n", __FUNCTION__);
295 return -ENOMEM;
296 }
297
298 scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
299 vendor, compatible);
300 scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
301 model, compatible);
302
303 if (strflags)
304 devinfo->flags = simple_strtoul(strflags, NULL, 0);
305 else
306 devinfo->flags = flags;
307
308 devinfo->compatible = compatible;
309
310 if (compatible)
311 list_add_tail(&devinfo->dev_info_list, &scsi_dev_info_list);
312 else
313 list_add(&devinfo->dev_info_list, &scsi_dev_info_list);
314
315 return 0;
316 }
317
318 /**
319 * scsi_dev_info_list_add_str: parse dev_list and add to the
320 * scsi_dev_info_list.
321 * @dev_list: string of device flags to add
322 *
323 * Description:
324 * Parse dev_list, and add entries to the scsi_dev_info_list.
325 * dev_list is of the form "vendor:product:flag,vendor:product:flag".
326 * dev_list is modified via strsep. Can be called for command line
327 * addition, for proc or mabye a sysfs interface.
328 *
329 * Returns: 0 if OK, -error on failure.
330 **/
331 static int scsi_dev_info_list_add_str(char *dev_list)
332 {
333 char *vendor, *model, *strflags, *next;
334 char *next_check;
335 int res = 0;
336
337 next = dev_list;
338 if (next && next[0] == '"') {
339 /*
340 * Ignore both the leading and trailing quote.
341 */
342 next++;
343 next_check = ",\"";
344 } else {
345 next_check = ",";
346 }
347
348 /*
349 * For the leading and trailing '"' case, the for loop comes
350 * through the last time with vendor[0] == '\0'.
351 */
352 for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
353 && (res == 0); vendor = strsep(&next, ":")) {
354 strflags = NULL;
355 model = strsep(&next, ":");
356 if (model)
357 strflags = strsep(&next, next_check);
358 if (!model || !strflags) {
359 printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
360 " '%s'\n", __FUNCTION__, vendor, model,
361 strflags);
362 res = -EINVAL;
363 } else
364 res = scsi_dev_info_list_add(0 /* compatible */, vendor,
365 model, strflags, 0);
366 }
367 return res;
368 }
369
370 /**
371 * get_device_flags - get device specific flags from the dynamic device
372 * list. Called during scan time.
373 * @vendor: vendor name
374 * @model: model name
375 *
376 * Description:
377 * Search the scsi_dev_info_list for an entry matching @vendor and
378 * @model, if found, return the matching flags value, else return
379 * the host or global default settings.
380 **/
381 int scsi_get_device_flags(struct scsi_device *sdev,
382 const unsigned char *vendor,
383 const unsigned char *model)
384 {
385 struct scsi_dev_info_list *devinfo;
386 unsigned int bflags;
387
388 bflags = sdev->sdev_bflags;
389 if (!bflags)
390 bflags = scsi_default_dev_flags;
391
392 list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
393 if (devinfo->compatible) {
394 /*
395 * Behave like the older version of get_device_flags.
396 */
397 size_t max;
398 /*
399 * XXX why skip leading spaces? If an odd INQUIRY
400 * value, that should have been part of the
401 * scsi_static_device_list[] entry, such as " FOO"
402 * rather than "FOO". Since this code is already
403 * here, and we don't know what device it is
404 * trying to work with, leave it as-is.
405 */
406 max = 8; /* max length of vendor */
407 while ((max > 0) && *vendor == ' ') {
408 max--;
409 vendor++;
410 }
411 /*
412 * XXX removing the following strlen() would be
413 * good, using it means that for a an entry not in
414 * the list, we scan every byte of every vendor
415 * listed in scsi_static_device_list[], and never match
416 * a single one (and still have to compare at
417 * least the first byte of each vendor).
418 */
419 if (memcmp(devinfo->vendor, vendor,
420 min(max, strlen(devinfo->vendor))))
421 continue;
422 /*
423 * Skip spaces again.
424 */
425 max = 16; /* max length of model */
426 while ((max > 0) && *model == ' ') {
427 max--;
428 model++;
429 }
430 if (memcmp(devinfo->model, model,
431 min(max, strlen(devinfo->model))))
432 continue;
433 return devinfo->flags;
434 } else {
435 if (!memcmp(devinfo->vendor, vendor,
436 sizeof(devinfo->vendor)) &&
437 !memcmp(devinfo->model, model,
438 sizeof(devinfo->model)))
439 return devinfo->flags;
440 }
441 }
442 return bflags;
443 }
444
445 #ifdef CONFIG_SCSI_PROC_FS
446 /*
447 * proc_scsi_dev_info_read: dump the scsi_dev_info_list via
448 * /proc/scsi/device_info
449 */
450 static int proc_scsi_devinfo_read(char *buffer, char **start,
451 off_t offset, int length)
452 {
453 struct scsi_dev_info_list *devinfo;
454 int size, len = 0;
455 off_t begin = 0;
456 off_t pos = 0;
457
458 list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
459 size = sprintf(buffer + len, "'%.8s' '%.16s' 0x%x\n",
460 devinfo->vendor, devinfo->model, devinfo->flags);
461 len += size;
462 pos = begin + len;
463 if (pos < offset) {
464 len = 0;
465 begin = pos;
466 }
467 if (pos > offset + length)
468 goto stop_output;
469 }
470
471 stop_output:
472 *start = buffer + (offset - begin); /* Start of wanted data */
473 len -= (offset - begin); /* Start slop */
474 if (len > length)
475 len = length; /* Ending slop */
476 return (len);
477 }
478
479 /*
480 * proc_scsi_dev_info_write: allow additions to the scsi_dev_info_list via
481 * /proc.
482 *
483 * Use: echo "vendor:model:flag" > /proc/scsi/device_info
484 *
485 * To add a black/white list entry for vendor and model with an integer
486 * value of flag to the scsi device info list.
487 */
488 static int proc_scsi_devinfo_write(struct file *file, const char __user *buf,
489 unsigned long length, void *data)
490 {
491 char *buffer;
492 int err = length;
493
494 if (!buf || length>PAGE_SIZE)
495 return -EINVAL;
496 if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
497 return -ENOMEM;
498 if (copy_from_user(buffer, buf, length)) {
499 err =-EFAULT;
500 goto out;
501 }
502
503 if (length < PAGE_SIZE)
504 buffer[length] = '\0';
505 else if (buffer[PAGE_SIZE-1]) {
506 err = -EINVAL;
507 goto out;
508 }
509
510 scsi_dev_info_list_add_str(buffer);
511
512 out:
513 free_page((unsigned long)buffer);
514 return err;
515 }
516 #endif /* CONFIG_SCSI_PROC_FS */
517
518 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
519 MODULE_PARM_DESC(dev_flags,
520 "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
521 " list entries for vendor and model with an integer value of flags"
522 " to the scsi device info list");
523
524 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
525 MODULE_PARM_DESC(default_dev_flags,
526 "scsi default device flag integer value");
527
528 /**
529 * scsi_dev_info_list_delete: called from scsi.c:exit_scsi to remove
530 * the scsi_dev_info_list.
531 **/
532 void scsi_exit_devinfo(void)
533 {
534 struct list_head *lh, *lh_next;
535 struct scsi_dev_info_list *devinfo;
536
537 #ifdef CONFIG_SCSI_PROC_FS
538 remove_proc_entry("scsi/device_info", NULL);
539 #endif
540
541 list_for_each_safe(lh, lh_next, &scsi_dev_info_list) {
542 devinfo = list_entry(lh, struct scsi_dev_info_list,
543 dev_info_list);
544 kfree(devinfo);
545 }
546 }
547
548 /**
549 * scsi_dev_list_init: set up the dynamic device list.
550 * @dev_list: string of device flags to add
551 *
552 * Description:
553 * Add command line @dev_list entries, then add
554 * scsi_static_device_list entries to the scsi device info list.
555 **/
556 int __init scsi_init_devinfo(void)
557 {
558 #ifdef CONFIG_SCSI_PROC_FS
559 struct proc_dir_entry *p;
560 #endif
561 int error, i;
562
563 error = scsi_dev_info_list_add_str(scsi_dev_flags);
564 if (error)
565 return error;
566
567 for (i = 0; scsi_static_device_list[i].vendor; i++) {
568 error = scsi_dev_info_list_add(1 /* compatibile */,
569 scsi_static_device_list[i].vendor,
570 scsi_static_device_list[i].model,
571 NULL,
572 scsi_static_device_list[i].flags);
573 if (error)
574 goto out;
575 }
576
577 #ifdef CONFIG_SCSI_PROC_FS
578 p = create_proc_entry("scsi/device_info", 0, NULL);
579 if (!p) {
580 error = -ENOMEM;
581 goto out;
582 }
583
584 p->owner = THIS_MODULE;
585 p->get_info = proc_scsi_devinfo_read;
586 p->write_proc = proc_scsi_devinfo_write;
587 #endif /* CONFIG_SCSI_PROC_FS */
588
589 out:
590 if (error)
591 scsi_exit_devinfo();
592 return error;
593 }
A Kernel for the Dreambox dm7025.