1// SPDX-License-Identifier: GPL-2.0
2
3#include <linux/blkdev.h>
4#include <linux/init.h>
5#include <linux/kernel.h>
6#include <linux/module.h>
7#include <linux/moduleparam.h>
8#include <linux/proc_fs.h>
9#include <linux/seq_file.h>
10#include <linux/slab.h>
11
12#include <scsi/scsi_device.h>
13#include <scsi/scsi_devinfo.h>
14
15#include "scsi_priv.h"
16
17
18/*
19 * scsi_dev_info_list: structure to hold black/white listed devices.
20 */
21struct scsi_dev_info_list {
22 struct list_head dev_info_list;
23 char vendor[8];
24 char model[16];
25 blist_flags_t flags;
26 unsigned compatible; /* for use with scsi_static_device_list entries */
27};
28
29struct scsi_dev_info_list_table {
30 struct list_head node; /* our node for being on the master list */
31 struct list_head scsi_dev_info_list; /* head of dev info list */
32 const char *name; /* name of list for /proc (NULL for global) */
33 int key; /* unique numeric identifier */
34};
35
36
37static blist_flags_t scsi_default_dev_flags;
38static LIST_HEAD(scsi_dev_info_list);
39static char scsi_dev_flags[256];
40
41/*
42 * scsi_static_device_list: deprecated list of devices that require
43 * settings that differ from the default, includes black-listed (broken)
44 * devices. The entries here are added to the tail of scsi_dev_info_list
45 * via scsi_dev_info_list_init.
46 *
47 * Do not add to this list, use the command line or proc interface to add
48 * to the scsi_dev_info_list. This table will eventually go away.
49 */
50static struct {
51 char *vendor;
52 char *model;
53 char *revision; /* revision known to be bad, unused */
54 blist_flags_t flags;
55} scsi_static_device_list[] __initdata = {
56 /*
57 * The following devices are known not to tolerate a lun != 0 scan
58 * for one reason or another. Some will respond to all luns,
59 * others will lock up.
60 */
61 {"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN}, /* locks up */
62 {"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN}, /* locks up */
63 {"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN}, /* locks up */
64 {"DENON", "DRD-25X", "V", BLIST_NOLUN}, /* locks up */
65 {"HITACHI", "DK312C", "CM81", BLIST_NOLUN}, /* responds to all lun */
66 {"HITACHI", "DK314C", "CR21", BLIST_NOLUN}, /* responds to all lun */
67 {"IBM", "2104-DU3", NULL, BLIST_NOLUN}, /* locks up */
68 {"IBM", "2104-TU3", NULL, BLIST_NOLUN}, /* locks up */
69 {"IMS", "CDD521/10", "2.06", BLIST_NOLUN}, /* locks up */
70 {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN}, /* locks up */
71 {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN}, /* locks up */
72 {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN}, /* locks up */
73 {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN}, /* locks up */
74 {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN}, /* locks up */
75 {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN}, /* responds to all lun */
76 {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN}, /* responds to all lun */
77 {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
78 {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN}, /* responds to all lun */
79 {"RODIME", "RO3000S", "2.33", BLIST_NOLUN}, /* locks up */
80 {"SUN", "SENA", NULL, BLIST_NOLUN}, /* responds to all luns */
81 /*
82 * The following causes a failed REQUEST SENSE on lun 1 for
83 * aha152x controller, which causes SCSI code to reset bus.
84 */
85 {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
86 /*
87 * The following causes a failed REQUEST SENSE on lun 1 for
88 * aha152x controller, which causes SCSI code to reset bus.
89 */
90 {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
91 {"SEAGATE", "ST296", "921", BLIST_NOLUN}, /* responds to all lun */
92 {"SEAGATE", "ST1581", "6538", BLIST_NOLUN}, /* responds to all lun */
93 {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
94 {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
95 {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
96 {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
97 {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
98 {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN}, /* locks up */
99 {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN}, /* locks up */
100 /*
101 * The following causes a failed REQUEST SENSE on lun 1 for
102 * seagate controller, which causes SCSI code to reset bus.
103 */
104 {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
105 {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN}, /* responds to all lun */
106 /*
107 * The following causes a failed REQUEST SENSE on lun 1 for
108 * seagate controller, which causes SCSI code to reset bus.
109 */
110 {"HP", "C1750A", "3226", BLIST_NOLUN}, /* scanjet iic */
111 {"HP", "C1790A", NULL, BLIST_NOLUN}, /* scanjet iip */
112 {"HP", "C2500A", NULL, BLIST_NOLUN}, /* scanjet iicx */
113 {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
114 {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN}, /* responds to all lun */
115 {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN}, /* locks up */
116 {"NEC", "D3856", "0009", BLIST_NOLUN},
117 {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN}, /* locks up */
118 {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN}, /* locks up */
119 {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN}, /* locks up */
120 {"RELISYS", "Scorpio", NULL, BLIST_NOLUN}, /* responds to all lun */
121 {"SANKYO", "CP525", "6.64", BLIST_NOLUN}, /* causes failed REQ SENSE, extra reset */
122 {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN | BLIST_BORKEN},
123 {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
124 {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN}, /* locks up */
125 {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN}, /* locks up */
126 {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN}, /* locks up */
127 {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN}, /* locks up */
128 {"", "Scanner", "1.80", BLIST_NOLUN}, /* responds to all lun */
129
130 /*
131 * Other types of devices that have special flags.
132 * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
133 */
134 {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
135 {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
136 {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
137 {"AIX", "VDASD", NULL, BLIST_TRY_VPD_PAGES},
138 {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
139 {"BELKIN", "USB 2 HS-CF", "1.95", BLIST_FORCELUN | BLIST_INQUIRY_36},
140 {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
141 {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
142 {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
143 {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
144 {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN}, /* CMD RAID Controller */
145 {"CNSI", "G7324", NULL, BLIST_SPARSELUN}, /* Chaparral G7324 RAID */
146 {"CNSi", "G8324", NULL, BLIST_SPARSELUN}, /* Chaparral G8324 RAID */
147 {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
148 BLIST_MAX_512 | BLIST_REPORTLUN2}, /* Compaq RA4x00 */
149 {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
150 {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
151 {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
152 {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
153 {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
154 {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
155 {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
156 {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
157 {"DELL", "PV660F PSEUDO", NULL, BLIST_SPARSELUN},
158 {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN}, /* Dell PV 530F */
159 {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
160 {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
161 {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* EMC CLARiiON, storage on LUN 0 */
162 {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* EMC CLARiiON, no storage on LUN 0 */
163 {"EMC", "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
164 {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
165 BLIST_REPORTLUN2 | BLIST_RETRY_ITF},
166 {"EMULEX", "MD21/S2 ESDI", NULL, BLIST_SINGLELUN},
167 {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
168 {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
169 {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
170 {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
171 {"FUJITSU", "ETERNUS_DXM", "*", BLIST_RETRY_ASC_C1},
172 {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
173 {"Generic", "USB Storage-SMC", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36}, /* FW: 0180 and 0207 */
174 {"HITACHI", "DF400", "*", BLIST_REPORTLUN2},
175 {"HITACHI", "DF500", "*", BLIST_REPORTLUN2},
176 {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
177 {"HITACHI", "HUS1530", "*", BLIST_NO_DIF},
178 {"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES},
179 {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP VA7400 */
180 {"HP", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES}, /* HP XP Arrays */
181 {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
182 {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
183 {"HP", "C1557A", NULL, BLIST_FORCELUN},
184 {"HP", "C3323-300", "4269", BLIST_NOTQ},
185 {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
186 {"HP", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
187 {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
188 {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
189 {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
190 {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
191 {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
192 {"IOMEGA", "Io20S *F", NULL, BLIST_KEY},
193 {"INSITE", "Floptical F*8I", NULL, BLIST_KEY},
194 {"INSITE", "I325VM", NULL, BLIST_KEY},
195 {"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
196 {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
197 {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
198 {"Marvell", "Console", NULL, BLIST_SKIP_VPD_PAGES},
199 {"Marvell", "91xx Config", "1.01", BLIST_SKIP_VPD_PAGES},
200 {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
201 {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
202 {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
203 {"Medion", "Flash XL MMC/SD", "2.6D", BLIST_FORCELUN},
204 {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
205 {"MICROP", "4110", NULL, BLIST_NOTQ},
206 {"MSFT", "Virtual HD", NULL, BLIST_MAX_1024 | BLIST_NO_RSOC},
207 {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
208 {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
209 {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
210 {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
211 {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
212 {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
213 {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
214 {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
215 {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
216 {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
217 {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
218 {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
219 {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
220 {"Promise", "", NULL, BLIST_SPARSELUN},
221 {"QEMU", "QEMU CD-ROM", NULL, BLIST_SKIP_VPD_PAGES},
222 {"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
223 {"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
224 {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
225 {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
226 {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
227 {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ}, /* Chokes on tagged INQUIRY */
228 {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
229 {"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
230 {"SGI", "RAID3", "*", BLIST_SPARSELUN},
231 {"SGI", "RAID5", "*", BLIST_SPARSELUN},
232 {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
233 {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
234 {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
235 {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
236 {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
237 {"STK", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
238 {"NETAPP", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
239 {"LSI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
240 {"ENGENIO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
241 {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
242 {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
243 {"SONY", "TSL", NULL, BLIST_FORCELUN}, /* DDS3 & DDS4 autoloaders */
244 {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
245 {"SUN", "T300", "*", BLIST_SPARSELUN},
246 {"SUN", "T4", "*", BLIST_SPARSELUN},
247 {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
248 {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
249 {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
250 {"Traxdata", "CDR4120", NULL, BLIST_NOLUN}, /* locks up */
251 {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
252 {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
253 {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
254 {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
255 {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
256 {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
257 {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
258 {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
259 { NULL, NULL, NULL, 0 },
260};
261
262static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
263{
264 struct scsi_dev_info_list_table *devinfo_table;
265 int found = 0;
266
267 list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
268 if (devinfo_table->key == key) {
269 found = 1;
270 break;
271 }
272 if (!found)
273 return ERR_PTR(-EINVAL);
274
275 return devinfo_table;
276}
277
278/*
279 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
280 * devinfo vendor and model strings.
281 */
282static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
283 char *from, int compatible)
284{
285 size_t from_length;
286
287 from_length = strlen(from);
288 /* This zero-pads the destination */
289 strncpy(to, from, to_length);
290 if (from_length < to_length && !compatible) {
291 /*
292 * space pad the string if it is short.
293 */
294 memset(&to[from_length], ' ', to_length - from_length);
295 }
296 if (from_length > to_length)
297 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
298 __func__, name, from);
299}
300
301/**
302 * scsi_dev_info_list_add - add one dev_info list entry.
303 * @compatible: if true, null terminate short strings. Otherwise space pad.
304 * @vendor: vendor string
305 * @model: model (product) string
306 * @strflags: integer string
307 * @flags: if strflags NULL, use this flag value
308 *
309 * Description:
310 * Create and add one dev_info entry for @vendor, @model, @strflags or
311 * @flag. If @compatible, add to the tail of the list, do not space
312 * pad, and set devinfo->compatible. The scsi_static_device_list entries
313 * are added with @compatible 1 and @clfags NULL.
314 *
315 * Returns: 0 OK, -error on failure.
316 **/
317static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
318 char *strflags, blist_flags_t flags)
319{
320 return scsi_dev_info_list_add_keyed(compatible, vendor, model,
321 strflags, flags,
322 SCSI_DEVINFO_GLOBAL);
323}
324
325/**
326 * scsi_dev_info_list_add_keyed - add one dev_info list entry.
327 * @compatible: if true, null terminate short strings. Otherwise space pad.
328 * @vendor: vendor string
329 * @model: model (product) string
330 * @strflags: integer string
331 * @flags: if strflags NULL, use this flag value
332 * @key: specify list to use
333 *
334 * Description:
335 * Create and add one dev_info entry for @vendor, @model,
336 * @strflags or @flag in list specified by @key. If @compatible,
337 * add to the tail of the list, do not space pad, and set
338 * devinfo->compatible. The scsi_static_device_list entries are
339 * added with @compatible 1 and @clfags NULL.
340 *
341 * Returns: 0 OK, -error on failure.
342 **/
343int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
344 char *strflags, blist_flags_t flags,
345 enum scsi_devinfo_key key)
346{
347 struct scsi_dev_info_list *devinfo;
348 struct scsi_dev_info_list_table *devinfo_table =
349 scsi_devinfo_lookup_by_key(key);
350
351 if (IS_ERR(devinfo_table))
352 return PTR_ERR(devinfo_table);
353
354 devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
355 if (!devinfo) {
356 printk(KERN_ERR "%s: no memory\n", __func__);
357 return -ENOMEM;
358 }
359
360 scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
361 vendor, compatible);
362 scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
363 model, compatible);
364
365 if (strflags) {
366 unsigned long long val;
367 int ret = kstrtoull(strflags, 0, &val);
368
369 if (ret != 0) {
370 kfree(devinfo);
371 return ret;
372 }
373 flags = (__force blist_flags_t)val;
374 }
375 if (flags & __BLIST_UNUSED_MASK) {
376 pr_err("scsi_devinfo (%s:%s): unsupported flags 0x%llx",
377 vendor, model, flags & __BLIST_UNUSED_MASK);
378 kfree(devinfo);
379 return -EINVAL;
380 }
381 devinfo->flags = flags;
382 devinfo->compatible = compatible;
383
384 if (compatible)
385 list_add_tail(&devinfo->dev_info_list,
386 &devinfo_table->scsi_dev_info_list);
387 else
388 list_add(&devinfo->dev_info_list,
389 &devinfo_table->scsi_dev_info_list);
390
391 return 0;
392}
393EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
394
395/**
396 * scsi_dev_info_list_find - find a matching dev_info list entry.
397 * @vendor: full vendor string
398 * @model: full model (product) string
399 * @key: specify list to use
400 *
401 * Description:
402 * Finds the first dev_info entry matching @vendor, @model
403 * in list specified by @key.
404 *
405 * Returns: pointer to matching entry, or ERR_PTR on failure.
406 **/
407static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
408 const char *model, enum scsi_devinfo_key key)
409{
410 struct scsi_dev_info_list *devinfo;
411 struct scsi_dev_info_list_table *devinfo_table =
412 scsi_devinfo_lookup_by_key(key);
413 size_t vmax, mmax, mlen;
414 const char *vskip, *mskip;
415
416 if (IS_ERR(devinfo_table))
417 return (struct scsi_dev_info_list *) devinfo_table;
418
419 /* Prepare for "compatible" matches */
420
421 /*
422 * XXX why skip leading spaces? If an odd INQUIRY
423 * value, that should have been part of the
424 * scsi_static_device_list[] entry, such as " FOO"
425 * rather than "FOO". Since this code is already
426 * here, and we don't know what device it is
427 * trying to work with, leave it as-is.
428 */
429 vmax = sizeof(devinfo->vendor);
430 vskip = vendor;
431 while (vmax > 0 && *vskip == ' ') {
432 vmax--;
433 vskip++;
434 }
435 /* Also skip trailing spaces */
436 while (vmax > 0 && vskip[vmax - 1] == ' ')
437 --vmax;
438
439 mmax = sizeof(devinfo->model);
440 mskip = model;
441 while (mmax > 0 && *mskip == ' ') {
442 mmax--;
443 mskip++;
444 }
445 while (mmax > 0 && mskip[mmax - 1] == ' ')
446 --mmax;
447
448 list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
449 dev_info_list) {
450 if (devinfo->compatible) {
451 /*
452 * vendor strings must be an exact match
453 */
454 if (vmax != strnlen(devinfo->vendor,
455 sizeof(devinfo->vendor)) ||
456 memcmp(devinfo->vendor, vskip, vmax))
457 continue;
458
459 /*
460 * @model specifies the full string, and
461 * must be larger or equal to devinfo->model
462 */
463 mlen = strnlen(devinfo->model, sizeof(devinfo->model));
464 if (mmax < mlen || memcmp(devinfo->model, mskip, mlen))
465 continue;
466 return devinfo;
467 } else {
468 if (!memcmp(devinfo->vendor, vendor,
469 sizeof(devinfo->vendor)) &&
470 !memcmp(devinfo->model, model,
471 sizeof(devinfo->model)))
472 return devinfo;
473 }
474 }
475
476 return ERR_PTR(-ENOENT);
477}
478
479/**
480 * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
481 * @vendor: vendor string
482 * @model: model (product) string
483 * @key: specify list to use
484 *
485 * Description:
486 * Remove and destroy one dev_info entry for @vendor, @model
487 * in list specified by @key.
488 *
489 * Returns: 0 OK, -error on failure.
490 **/
491int scsi_dev_info_list_del_keyed(char *vendor, char *model,
492 enum scsi_devinfo_key key)
493{
494 struct scsi_dev_info_list *found;
495
496 found = scsi_dev_info_list_find(vendor, model, key);
497 if (IS_ERR(found))
498 return PTR_ERR(found);
499
500 list_del(&found->dev_info_list);
501 kfree(found);
502 return 0;
503}
504EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
505
506/**
507 * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
508 * @dev_list: string of device flags to add
509 *
510 * Description:
511 * Parse dev_list, and add entries to the scsi_dev_info_list.
512 * dev_list is of the form "vendor:product:flag,vendor:product:flag".
513 * dev_list is modified via strsep. Can be called for command line
514 * addition, for proc or mabye a sysfs interface.
515 *
516 * Returns: 0 if OK, -error on failure.
517 **/
518static int scsi_dev_info_list_add_str(char *dev_list)
519{
520 char *vendor, *model, *strflags, *next;
521 char *next_check;
522 int res = 0;
523
524 next = dev_list;
525 if (next && next[0] == '"') {
526 /*
527 * Ignore both the leading and trailing quote.
528 */
529 next++;
530 next_check = ",\"";
531 } else {
532 next_check = ",";
533 }
534
535 /*
536 * For the leading and trailing '"' case, the for loop comes
537 * through the last time with vendor[0] == '\0'.
538 */
539 for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
540 && (res == 0); vendor = strsep(&next, ":")) {
541 strflags = NULL;
542 model = strsep(&next, ":");
543 if (model)
544 strflags = strsep(&next, next_check);
545 if (!model || !strflags) {
546 printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
547 " '%s'\n", __func__, vendor, model,
548 strflags);
549 res = -EINVAL;
550 } else
551 res = scsi_dev_info_list_add(0 /* compatible */, vendor,
552 model, strflags, 0);
553 }
554 return res;
555}
556
557/**
558 * get_device_flags - get device specific flags from the dynamic device list.
559 * @sdev: &scsi_device to get flags for
560 * @vendor: vendor name
561 * @model: model name
562 *
563 * Description:
564 * Search the global scsi_dev_info_list (specified by list zero)
565 * for an entry matching @vendor and @model, if found, return the
566 * matching flags value, else return the host or global default
567 * settings. Called during scan time.
568 **/
569blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
570 const unsigned char *vendor,
571 const unsigned char *model)
572{
573 return scsi_get_device_flags_keyed(sdev, vendor, model,
574 SCSI_DEVINFO_GLOBAL);
575}
576
577
578/**
579 * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
580 * @sdev: &scsi_device to get flags for
581 * @vendor: vendor name
582 * @model: model name
583 * @key: list to look up
584 *
585 * Description:
586 * Search the scsi_dev_info_list specified by @key for an entry
587 * matching @vendor and @model, if found, return the matching
588 * flags value, else return the host or global default settings.
589 * Called during scan time.
590 **/
591blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
592 const unsigned char *vendor,
593 const unsigned char *model,
594 enum scsi_devinfo_key key)
595{
596 struct scsi_dev_info_list *devinfo;
597
598 devinfo = scsi_dev_info_list_find(vendor, model, key);
599 if (!IS_ERR(devinfo))
600 return devinfo->flags;
601
602 /* key or device not found: return nothing */
603 if (key != SCSI_DEVINFO_GLOBAL)
604 return 0;
605
606 /* except for the global list, where we have an exception */
607 if (sdev->sdev_bflags)
608 return sdev->sdev_bflags;
609
610 return scsi_default_dev_flags;
611}
612EXPORT_SYMBOL(scsi_get_device_flags_keyed);
613
614#ifdef CONFIG_SCSI_PROC_FS
615struct double_list {
616 struct list_head *top;
617 struct list_head *bottom;
618};
619
620static int devinfo_seq_show(struct seq_file *m, void *v)
621{
622 struct double_list *dl = v;
623 struct scsi_dev_info_list_table *devinfo_table =
624 list_entry(dl->top, struct scsi_dev_info_list_table, node);
625 struct scsi_dev_info_list *devinfo =
626 list_entry(dl->bottom, struct scsi_dev_info_list,
627 dev_info_list);
628
629 if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
630 devinfo_table->name)
631 seq_printf(m, "[%s]:\n", devinfo_table->name);
632
633 seq_printf(m, "'%.8s' '%.16s' 0x%llx\n",
634 devinfo->vendor, devinfo->model, devinfo->flags);
635 return 0;
636}
637
638static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
639{
640 struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
641 loff_t pos = *ppos;
642
643 if (!dl)
644 return NULL;
645
646 list_for_each(dl->top, &scsi_dev_info_list) {
647 struct scsi_dev_info_list_table *devinfo_table =
648 list_entry(dl->top, struct scsi_dev_info_list_table,
649 node);
650 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
651 if (pos-- == 0)
652 return dl;
653 }
654
655 kfree(dl);
656 return NULL;
657}
658
659static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
660{
661 struct double_list *dl = v;
662 struct scsi_dev_info_list_table *devinfo_table =
663 list_entry(dl->top, struct scsi_dev_info_list_table, node);
664
665 ++*ppos;
666 dl->bottom = dl->bottom->next;
667 while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
668 dl->top = dl->top->next;
669 if (dl->top == &scsi_dev_info_list) {
670 kfree(dl);
671 return NULL;
672 }
673 devinfo_table = list_entry(dl->top,
674 struct scsi_dev_info_list_table,
675 node);
676 dl->bottom = devinfo_table->scsi_dev_info_list.next;
677 }
678
679 return dl;
680}
681
682static void devinfo_seq_stop(struct seq_file *m, void *v)
683{
684 kfree(v);
685}
686
687static const struct seq_operations scsi_devinfo_seq_ops = {
688 .start = devinfo_seq_start,
689 .next = devinfo_seq_next,
690 .stop = devinfo_seq_stop,
691 .show = devinfo_seq_show,
692};
693
694static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
695{
696 return seq_open(file, &scsi_devinfo_seq_ops);
697}
698
699/*
700 * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
701 *
702 * Description: Adds a black/white list entry for vendor and model with an
703 * integer value of flag to the scsi device info list.
704 * To use, echo "vendor:model:flag" > /proc/scsi/device_info
705 */
706static ssize_t proc_scsi_devinfo_write(struct file *file,
707 const char __user *buf,
708 size_t length, loff_t *ppos)
709{
710 char *buffer;
711 ssize_t err = length;
712
713 if (!buf || length>PAGE_SIZE)
714 return -EINVAL;
715 if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
716 return -ENOMEM;
717 if (copy_from_user(buffer, buf, length)) {
718 err =-EFAULT;
719 goto out;
720 }
721
722 if (length < PAGE_SIZE)
723 buffer[length] = '\0';
724 else if (buffer[PAGE_SIZE-1]) {
725 err = -EINVAL;
726 goto out;
727 }
728
729 scsi_dev_info_list_add_str(buffer);
730
731out:
732 free_page((unsigned long)buffer);
733 return err;
734}
735
736static const struct file_operations scsi_devinfo_proc_fops = {
737 .owner = THIS_MODULE,
738 .open = proc_scsi_devinfo_open,
739 .read = seq_read,
740 .write = proc_scsi_devinfo_write,
741 .llseek = seq_lseek,
742 .release = seq_release,
743};
744#endif /* CONFIG_SCSI_PROC_FS */
745
746module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
747MODULE_PARM_DESC(dev_flags,
748 "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
749 " list entries for vendor and model with an integer value of flags"
750 " to the scsi device info list");
751
752module_param_named(default_dev_flags, scsi_default_dev_flags, ullong, 0644);
753MODULE_PARM_DESC(default_dev_flags,
754 "scsi default device flag uint64_t value");
755
756/**
757 * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
758 **/
759void scsi_exit_devinfo(void)
760{
761#ifdef CONFIG_SCSI_PROC_FS
762 remove_proc_entry("scsi/device_info", NULL);
763#endif
764
765 scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
766}
767
768/**
769 * scsi_dev_info_add_list - add a new devinfo list
770 * @key: key of the list to add
771 * @name: Name of the list to add (for /proc/scsi/device_info)
772 *
773 * Adds the requested list, returns zero on success, -EEXIST if the
774 * key is already registered to a list, or other error on failure.
775 */
776int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name)
777{
778 struct scsi_dev_info_list_table *devinfo_table =
779 scsi_devinfo_lookup_by_key(key);
780
781 if (!IS_ERR(devinfo_table))
782 /* list already exists */
783 return -EEXIST;
784
785 devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
786
787 if (!devinfo_table)
788 return -ENOMEM;
789
790 INIT_LIST_HEAD(&devinfo_table->node);
791 INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
792 devinfo_table->name = name;
793 devinfo_table->key = key;
794 list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
795
796 return 0;
797}
798EXPORT_SYMBOL(scsi_dev_info_add_list);
799
800/**
801 * scsi_dev_info_remove_list - destroy an added devinfo list
802 * @key: key of the list to destroy
803 *
804 * Iterates over the entire list first, freeing all the values, then
805 * frees the list itself. Returns 0 on success or -EINVAL if the key
806 * can't be found.
807 */
808int scsi_dev_info_remove_list(enum scsi_devinfo_key key)
809{
810 struct list_head *lh, *lh_next;
811 struct scsi_dev_info_list_table *devinfo_table =
812 scsi_devinfo_lookup_by_key(key);
813
814 if (IS_ERR(devinfo_table))
815 /* no such list */
816 return -EINVAL;
817
818 /* remove from the master list */
819 list_del(&devinfo_table->node);
820
821 list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
822 struct scsi_dev_info_list *devinfo;
823
824 devinfo = list_entry(lh, struct scsi_dev_info_list,
825 dev_info_list);
826 kfree(devinfo);
827 }
828 kfree(devinfo_table);
829
830 return 0;
831}
832EXPORT_SYMBOL(scsi_dev_info_remove_list);
833
834/**
835 * scsi_init_devinfo - set up the dynamic device list.
836 *
837 * Description:
838 * Add command line entries from scsi_dev_flags, then add
839 * scsi_static_device_list entries to the scsi device info list.
840 */
841int __init scsi_init_devinfo(void)
842{
843#ifdef CONFIG_SCSI_PROC_FS
844 struct proc_dir_entry *p;
845#endif
846 int error, i;
847
848 error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
849 if (error)
850 return error;
851
852 error = scsi_dev_info_list_add_str(scsi_dev_flags);
853 if (error)
854 goto out;
855
856 for (i = 0; scsi_static_device_list[i].vendor; i++) {
857 error = scsi_dev_info_list_add(1 /* compatibile */,
858 scsi_static_device_list[i].vendor,
859 scsi_static_device_list[i].model,
860 NULL,
861 scsi_static_device_list[i].flags);
862 if (error)
863 goto out;
864 }
865
866#ifdef CONFIG_SCSI_PROC_FS
867 p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
868 if (!p) {
869 error = -ENOMEM;
870 goto out;
871 }
872#endif /* CONFIG_SCSI_PROC_FS */
873
874 out:
875 if (error)
876 scsi_exit_devinfo();
877 return error;
878}
879