]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - drivers/scsi/scsi_devinfo.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[SCSI] trivial scsi_execute_async fix
[mirror_ubuntu-artful-kernel.git] / drivers / scsi / scsi_devinfo.c
CommitLineData
1da177e4
LT		 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 */
19struct 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
28static const char spaces[] = " "; /* 16 of them */
29static unsigned scsi_default_dev_flags;
30static LIST_HEAD(scsi_dev_info_list);
31static 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 */
42static 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 */
f2536cbd
BK		 59 {"IBM", "2104-DU3", NULL, BLIST_NOLUN}, /* locks up */
60 {"IBM", "2104-TU3", NULL, BLIST_NOLUN}, /* locks up */
1da177e4
LT		 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},
1c536315 115 {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
1da177e4
LT		 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 */
0d7323c8 120 {"", "Scanner", "1.80", BLIST_NOLUN}, /* responds to all lun */
1da177e4
LT		 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},
98acfc7e 131 {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
1da177e4
LT		 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 */
4d7db04a
JB		 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 */
1da177e4
LT		 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},
507caac7 145 {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
1da177e4
LT		 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", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
154 {"EMULEX", "MD21/S2 ESDI", NULL, BLIST_SINGLELUN},
155 {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
156 {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
157 {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
158 {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
159 {"HITACHI", "DF400", "*", BLIST_SPARSELUN},
160 {"HITACHI", "DF500", "*", BLIST_SPARSELUN},
161 {"HITACHI", "DF600", "*", BLIST_SPARSELUN},
13f7e5ac
KG		 162 {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
163 {"HITACHI", "OPEN-E", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
1da177e4 164 {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP VA7400 */
9ba0883c 165 {"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
1da177e4
LT		 166 {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
167 {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
168 {"HP", "C1557A", NULL, BLIST_FORCELUN},
169 {"HP", "C3323-300", "4269", BLIST_NOTQ},
c3d83368 170 {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
1da177e4
LT		 171 {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
172 {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
173 {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
174 {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
175 {"IOMEGA", "Io20S *F", NULL, BLIST_KEY},
176 {"INSITE", "Floptical F*8I", NULL, BLIST_KEY},
177 {"INSITE", "I325VM", NULL, BLIST_KEY},
178 {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
179 {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
180 {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
181 {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
182 {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
183 {"Medion", "Flash XL MMC/SD", "2.6D", BLIST_FORCELUN},
184 {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
185 {"MICROP", "4110", NULL, BLIST_NOTQ},
186 {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
187 {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
188 {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
189 {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
190 {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
191 {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
192 {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
193 {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
194 {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
195 {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
f4fd20bf 196 {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
1da177e4
LT		 197 {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
198 {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
199 {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ}, /* Chokes on tagged INQUIRY */
200 {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
201 {"SGI", "RAID3", "*", BLIST_SPARSELUN},
202 {"SGI", "RAID5", "*", BLIST_SPARSELUN},
203 {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
204 {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
48690405 205 {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
1da177e4
LT		 206 {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
207 {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
208 {"SONY", "TSL", NULL, BLIST_FORCELUN}, /* DDS3 & DDS4 autoloaders */
209 {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
210 {"SUN", "T300", "*", BLIST_SPARSELUN},
211 {"SUN", "T4", "*", BLIST_SPARSELUN},
212 {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
213 {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
214 {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
215 {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
216 {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
217 {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
218 {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
219 {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
220 {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
221 {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
222 {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
223 { NULL, NULL, NULL, 0 },
224};
225
226/*
227 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
228 * devinfo vendor and model strings.
229 */
230static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
231 char *from, int compatible)
232{
233 size_t from_length;
234
235 from_length = strlen(from);
236 strncpy(to, from, min(to_length, from_length));
237 if (from_length < to_length) {
238 if (compatible) {
239 /*
240 * NUL terminate the string if it is short.
241 */
242 to[from_length] = '\0';
243 } else {
244 /*
245 * space pad the string if it is short.
246 */
247 strncpy(&to[from_length], spaces,
248 to_length - from_length);
249 }
250 }
251 if (from_length > to_length)
252 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
253 __FUNCTION__, name, from);
254}
255
256/**
257 * scsi_dev_info_list_add: add one dev_info list entry.
258 * @vendor: vendor string
259 * @model: model (product) string
260 * @strflags: integer string
261 * @flag: if strflags NULL, use this flag value
262 *
263 * Description:
264 * Create and add one dev_info entry for @vendor, @model, @strflags or
265 * @flag. If @compatible, add to the tail of the list, do not space
266 * pad, and set devinfo->compatible. The scsi_static_device_list entries
267 * are added with @compatible 1 and @clfags NULL.
268 *
269 * Returns: 0 OK, -error on failure.
270 **/
271static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
272 char *strflags, int flags)
273{
274 struct scsi_dev_info_list *devinfo;
275
276 devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
277 if (!devinfo) {
278 printk(KERN_ERR "%s: no memory\n", __FUNCTION__);
279 return -ENOMEM;
280 }
281
282 scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
283 vendor, compatible);
284 scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
285 model, compatible);
286
287 if (strflags)
288 devinfo->flags = simple_strtoul(strflags, NULL, 0);
289 else
290 devinfo->flags = flags;
291
292 devinfo->compatible = compatible;
293
294 if (compatible)
295 list_add_tail(&devinfo->dev_info_list, &scsi_dev_info_list);
296 else
297 list_add(&devinfo->dev_info_list, &scsi_dev_info_list);
298
299 return 0;
300}
301
302/**
303 * scsi_dev_info_list_add_str: parse dev_list and add to the
304 * scsi_dev_info_list.
305 * @dev_list: string of device flags to add
306 *
307 * Description:
308 * Parse dev_list, and add entries to the scsi_dev_info_list.
309 * dev_list is of the form "vendor:product:flag,vendor:product:flag".
310 * dev_list is modified via strsep. Can be called for command line
311 * addition, for proc or mabye a sysfs interface.
312 *
313 * Returns: 0 if OK, -error on failure.
314 **/
315static int scsi_dev_info_list_add_str(char *dev_list)
316{
317 char *vendor, *model, *strflags, *next;
318 char *next_check;
319 int res = 0;
320
321 next = dev_list;
322 if (next && next[0] == '"') {
323 /*
324 * Ignore both the leading and trailing quote.
325 */
326 next++;
327 next_check = ",\"";
328 } else {
329 next_check = ",";
330 }
331
332 /*
333 * For the leading and trailing '"' case, the for loop comes
334 * through the last time with vendor[0] == '\0'.
335 */
336 for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
337 && (res == 0); vendor = strsep(&next, ":")) {
338 strflags = NULL;
339 model = strsep(&next, ":");
340 if (model)
341 strflags = strsep(&next, next_check);
342 if (!model || !strflags) {
343 printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
344 " '%s'\n", __FUNCTION__, vendor, model,
345 strflags);
346 res = -EINVAL;
347 } else
348 res = scsi_dev_info_list_add(0 /* compatible */, vendor,
349 model, strflags, 0);
350 }
351 return res;
352}
353
354/**
355 * get_device_flags - get device specific flags from the dynamic device
356 * list. Called during scan time.
357 * @vendor: vendor name
358 * @model: model name
359 *
360 * Description:
361 * Search the scsi_dev_info_list for an entry matching @vendor and
362 * @model, if found, return the matching flags value, else return
363 * the host or global default settings.
364 **/
7f23e146
JB		 365int scsi_get_device_flags(struct scsi_device *sdev,
366 const unsigned char *vendor,
367 const unsigned char *model)
1da177e4
LT		 368{
369 struct scsi_dev_info_list *devinfo;
370 unsigned int bflags;
371
372 bflags = sdev->sdev_bflags;
373 if (!bflags)
374 bflags = scsi_default_dev_flags;
375
376 list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
377 if (devinfo->compatible) {
378 /*
379 * Behave like the older version of get_device_flags.
380 */
381 size_t max;
382 /*
383 * XXX why skip leading spaces? If an odd INQUIRY
384 * value, that should have been part of the
385 * scsi_static_device_list[] entry, such as " FOO"
386 * rather than "FOO". Since this code is already
387 * here, and we don't know what device it is
388 * trying to work with, leave it as-is.
389 */
390 max = 8; /* max length of vendor */
391 while ((max > 0) && *vendor == ' ') {
392 max--;
393 vendor++;
394 }
395 /*
396 * XXX removing the following strlen() would be
397 * good, using it means that for a an entry not in
398 * the list, we scan every byte of every vendor
399 * listed in scsi_static_device_list[], and never match
400 * a single one (and still have to compare at
401 * least the first byte of each vendor).
402 */
403 if (memcmp(devinfo->vendor, vendor,
404 min(max, strlen(devinfo->vendor))))
405 continue;
406 /*
407 * Skip spaces again.
408 */
409 max = 16; /* max length of model */
410 while ((max > 0) && *model == ' ') {
411 max--;
412 model++;
413 }
414 if (memcmp(devinfo->model, model,
415 min(max, strlen(devinfo->model))))
416 continue;
417 return devinfo->flags;
418 } else {
419 if (!memcmp(devinfo->vendor, vendor,
420 sizeof(devinfo->vendor)) &&
421 !memcmp(devinfo->model, model,
422 sizeof(devinfo->model)))
423 return devinfo->flags;
424 }
425 }
426 return bflags;
427}
428
429#ifdef CONFIG_SCSI_PROC_FS
430/*
431 * proc_scsi_dev_info_read: dump the scsi_dev_info_list via
432 * /proc/scsi/device_info
433 */
434static int proc_scsi_devinfo_read(char *buffer, char **start,
435 off_t offset, int length)
436{
437 struct scsi_dev_info_list *devinfo;
438 int size, len = 0;
439 off_t begin = 0;
440 off_t pos = 0;
441
442 list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
443 size = sprintf(buffer + len, "'%.8s' '%.16s' 0x%x\n",
444 devinfo->vendor, devinfo->model, devinfo->flags);
445 len += size;
446 pos = begin + len;
447 if (pos < offset) {
448 len = 0;
449 begin = pos;
450 }
451 if (pos > offset + length)
452 goto stop_output;
453 }
454
455stop_output:
456 *start = buffer + (offset - begin); /* Start of wanted data */
457 len -= (offset - begin); /* Start slop */
458 if (len > length)
459 len = length; /* Ending slop */
460 return (len);
461}
462
463/*
464 * proc_scsi_dev_info_write: allow additions to the scsi_dev_info_list via
465 * /proc.
466 *
467 * Use: echo "vendor:model:flag" > /proc/scsi/device_info
468 *
469 * To add a black/white list entry for vendor and model with an integer
470 * value of flag to the scsi device info list.
471 */
472static int proc_scsi_devinfo_write(struct file *file, const char __user *buf,
473 unsigned long length, void *data)
474{
475 char *buffer;
476 int err = length;
477
478 if (!buf || length>PAGE_SIZE)
479 return -EINVAL;
480 if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
481 return -ENOMEM;
482 if (copy_from_user(buffer, buf, length)) {
483 err =-EFAULT;
484 goto out;
485 }
486
487 if (length < PAGE_SIZE)
488 buffer[length] = '\0';
489 else if (buffer[PAGE_SIZE-1]) {
490 err = -EINVAL;
491 goto out;
492 }
493
494 scsi_dev_info_list_add_str(buffer);
495
496out:
497 free_page((unsigned long)buffer);
498 return err;
499}
500#endif /* CONFIG_SCSI_PROC_FS */
501
502module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
503MODULE_PARM_DESC(dev_flags,
504 "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
505 " list entries for vendor and model with an integer value of flags"
506 " to the scsi device info list");
507
508module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
509MODULE_PARM_DESC(default_dev_flags,
510 "scsi default device flag integer value");
511
512/**
513 * scsi_dev_info_list_delete: called from scsi.c:exit_scsi to remove
514 * the scsi_dev_info_list.
515 **/
516void scsi_exit_devinfo(void)
517{
518 struct list_head *lh, *lh_next;
519 struct scsi_dev_info_list *devinfo;
520
521#ifdef CONFIG_SCSI_PROC_FS
522 remove_proc_entry("scsi/device_info", NULL);
523#endif
524
525 list_for_each_safe(lh, lh_next, &scsi_dev_info_list) {
526 devinfo = list_entry(lh, struct scsi_dev_info_list,
527 dev_info_list);
528 kfree(devinfo);
529 }
530}
531
532/**
533 * scsi_dev_list_init: set up the dynamic device list.
534 * @dev_list: string of device flags to add
535 *
536 * Description:
537 * Add command line @dev_list entries, then add
538 * scsi_static_device_list entries to the scsi device info list.
539 **/
540int __init scsi_init_devinfo(void)
541{
542#ifdef CONFIG_SCSI_PROC_FS
543 struct proc_dir_entry *p;
544#endif
545 int error, i;
546
547 error = scsi_dev_info_list_add_str(scsi_dev_flags);
548 if (error)
549 return error;
550
551 for (i = 0; scsi_static_device_list[i].vendor; i++) {
552 error = scsi_dev_info_list_add(1 /* compatibile */,
553 scsi_static_device_list[i].vendor,
554 scsi_static_device_list[i].model,
555 NULL,
556 scsi_static_device_list[i].flags);
557 if (error)
558 goto out;
559 }
560
561#ifdef CONFIG_SCSI_PROC_FS
562 p = create_proc_entry("scsi/device_info", 0, NULL);
563 if (!p) {
564 error = -ENOMEM;
565 goto out;
566 }
567
568 p->owner = THIS_MODULE;
569 p->get_info = proc_scsi_devinfo_read;
570 p->write_proc = proc_scsi_devinfo_write;
571#endif /* CONFIG_SCSI_PROC_FS */
572
573 out:
574 if (error)
575 scsi_exit_devinfo();
576 return error;
577}
Ubuntu Artful kernel mirror