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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/scsi/scsi_devinfo.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/scsi/scsi_devinfo.c')
-rw-r--r--drivers/scsi/scsi_devinfo.c564
1 files changed, 564 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c
new file mode 100644
index 000000000000..6121dc1bfada
--- /dev/null
+++ b/drivers/scsi/scsi_devinfo.c
@@ -0,0 +1,564 @@
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 */
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 {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN}, /* locks up */
114 {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN}, /* locks up */
115 {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN}, /* locks up */
116 {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN}, /* locks up */
117
118 /*
119 * Other types of devices that have special flags.
120 * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
121 */
122 {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
123 {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
124 {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
125 {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
126 {"BELKIN", "USB 2 HS-CF", "1.95", BLIST_FORCELUN | BLIST_INQUIRY_36},
127 {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
128 {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
129 {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN}, /* CMD RAID Controller */
130 {"CNSI", "G7324", NULL, BLIST_SPARSELUN}, /* Chaparral G7324 RAID */
131 {"CNSi", "G8324", NULL, BLIST_SPARSELUN}, /* Chaparral G8324 RAID */
132 {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN},
133 {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
134 {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
135 {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
136 {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
137 {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
138 {"DEC", "HSG80", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
139 {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
140 {"DELL", "PV660F PSEUDO", NULL, BLIST_SPARSELUN},
141 {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN}, /* Dell PV 530F */
142 {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
143 {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
144 {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
145 {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
146 {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
147 {"EMULEX", "MD21/S2 ESDI", NULL, BLIST_SINGLELUN},
148 {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
149 {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
150 {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
151 {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
152 {"HITACHI", "DF400", "*", BLIST_SPARSELUN},
153 {"HITACHI", "DF500", "*", BLIST_SPARSELUN},
154 {"HITACHI", "DF600", "*", BLIST_SPARSELUN},
155 {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP VA7400 */
156 {"HP", "OPEN-", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP XP Arrays */
157 {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
158 {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
159 {"HP", "C1557A", NULL, BLIST_FORCELUN},
160 {"HP", "C3323-300", "4269", BLIST_NOTQ},
161 {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
162 {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
163 {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
164 {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
165 {"IOMEGA", "Io20S *F", NULL, BLIST_KEY},
166 {"INSITE", "Floptical F*8I", NULL, BLIST_KEY},
167 {"INSITE", "I325VM", NULL, BLIST_KEY},
168 {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
169 {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
170 {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
171 {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
172 {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
173 {"Medion", "Flash XL MMC/SD", "2.6D", BLIST_FORCELUN},
174 {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
175 {"MICROP", "4110", NULL, BLIST_NOTQ},
176 {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
177 {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
178 {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
179 {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
180 {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
181 {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
182 {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
183 {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
184 {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
185 {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
186 {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
187 {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
188 {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ}, /* Chokes on tagged INQUIRY */
189 {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
190 {"SGI", "RAID3", "*", BLIST_SPARSELUN},
191 {"SGI", "RAID5", "*", BLIST_SPARSELUN},
192 {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
193 {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
194 {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
195 {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
196 {"SONY", "TSL", NULL, BLIST_FORCELUN}, /* DDS3 & DDS4 autoloaders */
197 {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
198 {"SUN", "T300", "*", BLIST_SPARSELUN},
199 {"SUN", "T4", "*", BLIST_SPARSELUN},
200 {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
201 {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
202 {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
203 {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
204 {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
205 {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
206 {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
207 {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
208 {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
209 {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
210 {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
211 { NULL, NULL, NULL, 0 },
212};
213
214/*
215 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
216 * devinfo vendor and model strings.
217 */
218static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
219 char *from, int compatible)
220{
221 size_t from_length;
222
223 from_length = strlen(from);
224 strncpy(to, from, min(to_length, from_length));
225 if (from_length < to_length) {
226 if (compatible) {
227 /*
228 * NUL terminate the string if it is short.
229 */
230 to[from_length] = '\0';
231 } else {
232 /*
233 * space pad the string if it is short.
234 */
235 strncpy(&to[from_length], spaces,
236 to_length - from_length);
237 }
238 }
239 if (from_length > to_length)
240 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
241 __FUNCTION__, name, from);
242}
243
244/**
245 * scsi_dev_info_list_add: add one dev_info list entry.
246 * @vendor: vendor string
247 * @model: model (product) string
248 * @strflags: integer string
249 * @flag: if strflags NULL, use this flag value
250 *
251 * Description:
252 * Create and add one dev_info entry for @vendor, @model, @strflags or
253 * @flag. If @compatible, add to the tail of the list, do not space
254 * pad, and set devinfo->compatible. The scsi_static_device_list entries
255 * are added with @compatible 1 and @clfags NULL.
256 *
257 * Returns: 0 OK, -error on failure.
258 **/
259static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
260 char *strflags, int flags)
261{
262 struct scsi_dev_info_list *devinfo;
263
264 devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
265 if (!devinfo) {
266 printk(KERN_ERR "%s: no memory\n", __FUNCTION__);
267 return -ENOMEM;
268 }
269
270 scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
271 vendor, compatible);
272 scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
273 model, compatible);
274
275 if (strflags)
276 devinfo->flags = simple_strtoul(strflags, NULL, 0);
277 else
278 devinfo->flags = flags;
279
280 devinfo->compatible = compatible;
281
282 if (compatible)
283 list_add_tail(&devinfo->dev_info_list, &scsi_dev_info_list);
284 else
285 list_add(&devinfo->dev_info_list, &scsi_dev_info_list);
286
287 return 0;
288}
289
290/**
291 * scsi_dev_info_list_add_str: parse dev_list and add to the
292 * scsi_dev_info_list.
293 * @dev_list: string of device flags to add
294 *
295 * Description:
296 * Parse dev_list, and add entries to the scsi_dev_info_list.
297 * dev_list is of the form "vendor:product:flag,vendor:product:flag".
298 * dev_list is modified via strsep. Can be called for command line
299 * addition, for proc or mabye a sysfs interface.
300 *
301 * Returns: 0 if OK, -error on failure.
302 **/
303static int scsi_dev_info_list_add_str(char *dev_list)
304{
305 char *vendor, *model, *strflags, *next;
306 char *next_check;
307 int res = 0;
308
309 next = dev_list;
310 if (next && next[0] == '"') {
311 /*
312 * Ignore both the leading and trailing quote.
313 */
314 next++;
315 next_check = ",\"";
316 } else {
317 next_check = ",";
318 }
319
320 /*
321 * For the leading and trailing '"' case, the for loop comes
322 * through the last time with vendor[0] == '\0'.
323 */
324 for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
325 && (res == 0); vendor = strsep(&next, ":")) {
326 strflags = NULL;
327 model = strsep(&next, ":");
328 if (model)
329 strflags = strsep(&next, next_check);
330 if (!model || !strflags) {
331 printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
332 " '%s'\n", __FUNCTION__, vendor, model,
333 strflags);
334 res = -EINVAL;
335 } else
336 res = scsi_dev_info_list_add(0 /* compatible */, vendor,
337 model, strflags, 0);
338 }
339 return res;
340}
341
342/**
343 * get_device_flags - get device specific flags from the dynamic device
344 * list. Called during scan time.
345 * @vendor: vendor name
346 * @model: model name
347 *
348 * Description:
349 * Search the scsi_dev_info_list for an entry matching @vendor and
350 * @model, if found, return the matching flags value, else return
351 * the host or global default settings.
352 **/
353int scsi_get_device_flags(struct scsi_device *sdev, unsigned char *vendor,
354 unsigned char *model)
355{
356 struct scsi_dev_info_list *devinfo;
357 unsigned int bflags;
358
359 bflags = sdev->sdev_bflags;
360 if (!bflags)
361 bflags = scsi_default_dev_flags;
362
363 list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
364 if (devinfo->compatible) {
365 /*
366 * Behave like the older version of get_device_flags.
367 */
368 size_t max;
369 /*
370 * XXX why skip leading spaces? If an odd INQUIRY
371 * value, that should have been part of the
372 * scsi_static_device_list[] entry, such as " FOO"
373 * rather than "FOO". Since this code is already
374 * here, and we don't know what device it is
375 * trying to work with, leave it as-is.
376 */
377 max = 8; /* max length of vendor */
378 while ((max > 0) && *vendor == ' ') {
379 max--;
380 vendor++;
381 }
382 /*
383 * XXX removing the following strlen() would be
384 * good, using it means that for a an entry not in
385 * the list, we scan every byte of every vendor
386 * listed in scsi_static_device_list[], and never match
387 * a single one (and still have to compare at
388 * least the first byte of each vendor).
389 */
390 if (memcmp(devinfo->vendor, vendor,
391 min(max, strlen(devinfo->vendor))))
392 continue;
393 /*
394 * Skip spaces again.
395 */
396 max = 16; /* max length of model */
397 while ((max > 0) && *model == ' ') {
398 max--;
399 model++;
400 }
401 if (memcmp(devinfo->model, model,
402 min(max, strlen(devinfo->model))))
403 continue;
404 return devinfo->flags;
405 } else {
406 if (!memcmp(devinfo->vendor, vendor,
407 sizeof(devinfo->vendor)) &&
408 !memcmp(devinfo->model, model,
409 sizeof(devinfo->model)))
410 return devinfo->flags;
411 }
412 }
413 return bflags;
414}
415
416#ifdef CONFIG_SCSI_PROC_FS
417/*
418 * proc_scsi_dev_info_read: dump the scsi_dev_info_list via
419 * /proc/scsi/device_info
420 */
421static int proc_scsi_devinfo_read(char *buffer, char **start,
422 off_t offset, int length)
423{
424 struct scsi_dev_info_list *devinfo;
425 int size, len = 0;
426 off_t begin = 0;
427 off_t pos = 0;
428
429 list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
430 size = sprintf(buffer + len, "'%.8s' '%.16s' 0x%x\n",
431 devinfo->vendor, devinfo->model, devinfo->flags);
432 len += size;
433 pos = begin + len;
434 if (pos < offset) {
435 len = 0;
436 begin = pos;
437 }
438 if (pos > offset + length)
439 goto stop_output;
440 }
441
442stop_output:
443 *start = buffer + (offset - begin); /* Start of wanted data */
444 len -= (offset - begin); /* Start slop */
445 if (len > length)
446 len = length; /* Ending slop */
447 return (len);
448}
449
450/*
451 * proc_scsi_dev_info_write: allow additions to the scsi_dev_info_list via
452 * /proc.
453 *
454 * Use: echo "vendor:model:flag" > /proc/scsi/device_info
455 *
456 * To add a black/white list entry for vendor and model with an integer
457 * value of flag to the scsi device info list.
458 */
459static int proc_scsi_devinfo_write(struct file *file, const char __user *buf,
460 unsigned long length, void *data)
461{
462 char *buffer;
463 int err = length;
464
465 if (!buf || length>PAGE_SIZE)
466 return -EINVAL;
467 if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
468 return -ENOMEM;
469 if (copy_from_user(buffer, buf, length)) {
470 err =-EFAULT;
471 goto out;
472 }
473
474 if (length < PAGE_SIZE)
475 buffer[length] = '\0';
476 else if (buffer[PAGE_SIZE-1]) {
477 err = -EINVAL;
478 goto out;
479 }
480
481 scsi_dev_info_list_add_str(buffer);
482
483out:
484 free_page((unsigned long)buffer);
485 return err;
486}
487#endif /* CONFIG_SCSI_PROC_FS */
488
489module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
490MODULE_PARM_DESC(dev_flags,
491 "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
492 " list entries for vendor and model with an integer value of flags"
493 " to the scsi device info list");
494
495module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
496MODULE_PARM_DESC(default_dev_flags,
497 "scsi default device flag integer value");
498
499/**
500 * scsi_dev_info_list_delete: called from scsi.c:exit_scsi to remove
501 * the scsi_dev_info_list.
502 **/
503void scsi_exit_devinfo(void)
504{
505 struct list_head *lh, *lh_next;
506 struct scsi_dev_info_list *devinfo;
507
508#ifdef CONFIG_SCSI_PROC_FS
509 remove_proc_entry("scsi/device_info", NULL);
510#endif
511
512 list_for_each_safe(lh, lh_next, &scsi_dev_info_list) {
513 devinfo = list_entry(lh, struct scsi_dev_info_list,
514 dev_info_list);
515 kfree(devinfo);
516 }
517}
518
519/**
520 * scsi_dev_list_init: set up the dynamic device list.
521 * @dev_list: string of device flags to add
522 *
523 * Description:
524 * Add command line @dev_list entries, then add
525 * scsi_static_device_list entries to the scsi device info list.
526 **/
527int __init scsi_init_devinfo(void)
528{
529#ifdef CONFIG_SCSI_PROC_FS
530 struct proc_dir_entry *p;
531#endif
532 int error, i;
533
534 error = scsi_dev_info_list_add_str(scsi_dev_flags);
535 if (error)
536 return error;
537
538 for (i = 0; scsi_static_device_list[i].vendor; i++) {
539 error = scsi_dev_info_list_add(1 /* compatibile */,
540 scsi_static_device_list[i].vendor,
541 scsi_static_device_list[i].model,
542 NULL,
543 scsi_static_device_list[i].flags);
544 if (error)
545 goto out;
546 }
547
548#ifdef CONFIG_SCSI_PROC_FS
549 p = create_proc_entry("scsi/device_info", 0, NULL);
550 if (!p) {
551 error = -ENOMEM;
552 goto out;
553 }
554
555 p->owner = THIS_MODULE;
556 p->get_info = proc_scsi_devinfo_read;
557 p->write_proc = proc_scsi_devinfo_write;
558#endif /* CONFIG_SCSI_PROC_FS */
559
560 out:
561 if (error)
562 scsi_exit_devinfo();
563 return error;
564}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-16 06:17:42 -0500