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 */
21 struct 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
29 struct 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
37 static blist_flags_t scsi_default_dev_flags;
38 static LIST_HEAD(scsi_dev_info_list);
39 static 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 */
50 static 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 | BLIST_NO_VPD_SIZE},
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 {"Generic", "Ultra HS-SD/MMC", "2.09", BLIST_IGN_MEDIA_CHANGE | BLIST_INQUIRY_36},
175 {"HITACHI", "DF400", "*", BLIST_REPORTLUN2},
176 {"HITACHI", "DF500", "*", BLIST_REPORTLUN2},
177 {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
178 {"HITACHI", "HUS1530", "*", BLIST_NO_DIF},
179 {"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES},
180 {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP VA7400 */
181 {"HP", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES}, /* HP XP Arrays */
182 {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
183 {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
184 {"HP", "C1557A", NULL, BLIST_FORCELUN},
185 {"HP", "C3323-300", "4269", BLIST_NOTQ},
186 {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
187 {"HP", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
188 {"HPE", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES},
189 {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
190 {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
191 {"IBM", "2076", NULL, BLIST_NO_VPD_SIZE},
192 {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
193 {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
194 {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
195 {"IOMEGA", "Io20S *F", NULL, BLIST_KEY},
196 {"INSITE", "Floptical F*8I", NULL, BLIST_KEY},
197 {"INSITE", "I325VM", NULL, BLIST_KEY},
198 {"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
199 {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
200 {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
201 {"Marvell", "Console", NULL, BLIST_SKIP_VPD_PAGES},
202 {"Marvell", "91xx Config", "1.01", BLIST_SKIP_VPD_PAGES},
203 {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
204 {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
205 {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
206 {"Medion", "Flash XL MMC/SD", "2.6D", BLIST_FORCELUN},
207 {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
208 {"MICROP", "4110", NULL, BLIST_NOTQ},
209 {"MSFT", "Virtual HD", NULL, BLIST_MAX_1024 | BLIST_NO_RSOC},
210 {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
211 {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
212 {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
213 {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
214 {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
215 {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
216 {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
217 {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
218 {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
219 {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
220 {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
221 {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
222 {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
223 {"Promise", "", NULL, BLIST_SPARSELUN},
224 {"QEMU", "QEMU CD-ROM", NULL, BLIST_SKIP_VPD_PAGES},
225 {"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
226 {"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
227 {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
228 {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
229 {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
230 {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ}, /* Chokes on tagged INQUIRY */
231 {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
232 {"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
233 {"SGI", "RAID3", "*", BLIST_SPARSELUN},
234 {"SGI", "RAID5", "*", BLIST_SPARSELUN},
235 {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
236 {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
237 {"SKhynix", "H28U74301AMR", NULL, BLIST_SKIP_VPD_PAGES},
238 {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
239 {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
240 {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
241 {"STK", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
242 {"NETAPP", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
243 {"LSI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
244 {"ENGENIO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
245 {"LENOVO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
246 {"FUJITSU", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
247 {"SanDisk", "Cruzer Blade", NULL, BLIST_TRY_VPD_PAGES |
248 BLIST_INQUIRY_36},
249 {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
250 {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
251 {"SONY", "TSL", NULL, BLIST_FORCELUN}, /* DDS3 & DDS4 autoloaders */
252 {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
253 {"SUN", "T300", "*", BLIST_SPARSELUN},
254 {"SUN", "T4", "*", BLIST_SPARSELUN},
255 {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
256 {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
257 {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
258 {"Traxdata", "CDR4120", NULL, BLIST_NOLUN}, /* locks up */
259 {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
260 {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
261 {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
262 {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
263 {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
264 {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
265 {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
266 {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
267 { NULL, NULL, NULL, 0 },
268 };
269
scsi_devinfo_lookup_by_key(int key)270 static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
271 {
272 struct scsi_dev_info_list_table *devinfo_table;
273 int found = 0;
274
275 list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
276 if (devinfo_table->key == key) {
277 found = 1;
278 break;
279 }
280 if (!found)
281 return ERR_PTR(-EINVAL);
282
283 return devinfo_table;
284 }
285
286 /*
287 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
288 * devinfo vendor and model strings.
289 */
scsi_strcpy_devinfo(char * name,char * to,size_t to_length,char * from,int compatible)290 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
291 char *from, int compatible)
292 {
293 size_t from_length;
294
295 from_length = strlen(from);
296
297 /*
298 * null pad and null terminate if compatible
299 * otherwise space pad
300 */
301 if (compatible)
302 strscpy_pad(to, from, to_length);
303 else
304 memcpy_and_pad(to, to_length, from, from_length, ' ');
305
306 if (from_length > to_length)
307 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
308 __func__, name, from);
309 }
310
311 /**
312 * scsi_dev_info_list_add - add one dev_info list entry.
313 * @compatible: if true, null terminate short strings. Otherwise space pad.
314 * @vendor: vendor string
315 * @model: model (product) string
316 * @strflags: integer string
317 * @flags: if strflags NULL, use this flag value
318 *
319 * Description:
320 * Create and add one dev_info entry for @vendor, @model, @strflags or
321 * @flag. If @compatible, add to the tail of the list, do not space
322 * pad, and set devinfo->compatible. The scsi_static_device_list entries
323 * are added with @compatible 1 and @clfags NULL.
324 *
325 * Returns: 0 OK, -error on failure.
326 **/
scsi_dev_info_list_add(int compatible,char * vendor,char * model,char * strflags,blist_flags_t flags)327 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
328 char *strflags, blist_flags_t flags)
329 {
330 return scsi_dev_info_list_add_keyed(compatible, vendor, model,
331 strflags, flags,
332 SCSI_DEVINFO_GLOBAL);
333 }
334
335 /**
336 * scsi_dev_info_list_add_keyed - add one dev_info list entry.
337 * @compatible: if true, null terminate short strings. Otherwise space pad.
338 * @vendor: vendor string
339 * @model: model (product) string
340 * @strflags: integer string
341 * @flags: if strflags NULL, use this flag value
342 * @key: specify list to use
343 *
344 * Description:
345 * Create and add one dev_info entry for @vendor, @model,
346 * @strflags or @flag in list specified by @key. If @compatible,
347 * add to the tail of the list, do not space pad, and set
348 * devinfo->compatible. The scsi_static_device_list entries are
349 * added with @compatible 1 and @clfags NULL.
350 *
351 * Returns: 0 OK, -error on failure.
352 **/
scsi_dev_info_list_add_keyed(int compatible,char * vendor,char * model,char * strflags,blist_flags_t flags,enum scsi_devinfo_key key)353 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
354 char *strflags, blist_flags_t flags,
355 enum scsi_devinfo_key key)
356 {
357 struct scsi_dev_info_list *devinfo;
358 struct scsi_dev_info_list_table *devinfo_table =
359 scsi_devinfo_lookup_by_key(key);
360
361 if (IS_ERR(devinfo_table))
362 return PTR_ERR(devinfo_table);
363
364 devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
365 if (!devinfo) {
366 printk(KERN_ERR "%s: no memory\n", __func__);
367 return -ENOMEM;
368 }
369
370 scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
371 vendor, compatible);
372 scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
373 model, compatible);
374
375 if (strflags) {
376 unsigned long long val;
377 int ret = kstrtoull(strflags, 0, &val);
378
379 if (ret != 0) {
380 kfree(devinfo);
381 return ret;
382 }
383 flags = (__force blist_flags_t)val;
384 }
385 if (flags & __BLIST_UNUSED_MASK) {
386 pr_err("scsi_devinfo (%s:%s): unsupported flags 0x%llx",
387 vendor, model, flags & __BLIST_UNUSED_MASK);
388 kfree(devinfo);
389 return -EINVAL;
390 }
391 devinfo->flags = flags;
392 devinfo->compatible = compatible;
393
394 if (compatible)
395 list_add_tail(&devinfo->dev_info_list,
396 &devinfo_table->scsi_dev_info_list);
397 else
398 list_add(&devinfo->dev_info_list,
399 &devinfo_table->scsi_dev_info_list);
400
401 return 0;
402 }
403 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
404
405 /**
406 * scsi_dev_info_list_find - find a matching dev_info list entry.
407 * @vendor: full vendor string
408 * @model: full model (product) string
409 * @key: specify list to use
410 *
411 * Description:
412 * Finds the first dev_info entry matching @vendor, @model
413 * in list specified by @key.
414 *
415 * Returns: pointer to matching entry, or ERR_PTR on failure.
416 **/
scsi_dev_info_list_find(const char * vendor,const char * model,enum scsi_devinfo_key key)417 static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
418 const char *model, enum scsi_devinfo_key key)
419 {
420 struct scsi_dev_info_list *devinfo;
421 struct scsi_dev_info_list_table *devinfo_table =
422 scsi_devinfo_lookup_by_key(key);
423 size_t vmax, mmax, mlen;
424 const char *vskip, *mskip;
425
426 if (IS_ERR(devinfo_table))
427 return (struct scsi_dev_info_list *) devinfo_table;
428
429 /* Prepare for "compatible" matches */
430
431 /*
432 * XXX why skip leading spaces? If an odd INQUIRY
433 * value, that should have been part of the
434 * scsi_static_device_list[] entry, such as " FOO"
435 * rather than "FOO". Since this code is already
436 * here, and we don't know what device it is
437 * trying to work with, leave it as-is.
438 */
439 vmax = sizeof(devinfo->vendor);
440 vskip = vendor;
441 while (vmax > 0 && *vskip == ' ') {
442 vmax--;
443 vskip++;
444 }
445 /* Also skip trailing spaces */
446 while (vmax > 0 && vskip[vmax - 1] == ' ')
447 --vmax;
448
449 mmax = sizeof(devinfo->model);
450 mskip = model;
451 while (mmax > 0 && *mskip == ' ') {
452 mmax--;
453 mskip++;
454 }
455 while (mmax > 0 && mskip[mmax - 1] == ' ')
456 --mmax;
457
458 list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
459 dev_info_list) {
460 if (devinfo->compatible) {
461 /*
462 * vendor strings must be an exact match
463 */
464 if (vmax != strnlen(devinfo->vendor,
465 sizeof(devinfo->vendor)) ||
466 memcmp(devinfo->vendor, vskip, vmax))
467 continue;
468
469 /*
470 * @model specifies the full string, and
471 * must be larger or equal to devinfo->model
472 */
473 mlen = strnlen(devinfo->model, sizeof(devinfo->model));
474 if (mmax < mlen || memcmp(devinfo->model, mskip, mlen))
475 continue;
476 return devinfo;
477 } else {
478 if (!memcmp(devinfo->vendor, vendor,
479 sizeof(devinfo->vendor)) &&
480 !memcmp(devinfo->model, model,
481 sizeof(devinfo->model)))
482 return devinfo;
483 }
484 }
485
486 return ERR_PTR(-ENOENT);
487 }
488
489 /**
490 * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
491 * @vendor: vendor string
492 * @model: model (product) string
493 * @key: specify list to use
494 *
495 * Description:
496 * Remove and destroy one dev_info entry for @vendor, @model
497 * in list specified by @key.
498 *
499 * Returns: 0 OK, -error on failure.
500 **/
scsi_dev_info_list_del_keyed(char * vendor,char * model,enum scsi_devinfo_key key)501 int scsi_dev_info_list_del_keyed(char *vendor, char *model,
502 enum scsi_devinfo_key key)
503 {
504 struct scsi_dev_info_list *found;
505
506 found = scsi_dev_info_list_find(vendor, model, key);
507 if (IS_ERR(found))
508 return PTR_ERR(found);
509
510 list_del(&found->dev_info_list);
511 kfree(found);
512 return 0;
513 }
514 EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
515
516 /**
517 * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
518 * @dev_list: string of device flags to add
519 *
520 * Description:
521 * Parse dev_list, and add entries to the scsi_dev_info_list.
522 * dev_list is of the form "vendor:product:flag,vendor:product:flag".
523 * dev_list is modified via strsep. Can be called for command line
524 * addition, for proc or mabye a sysfs interface.
525 *
526 * Returns: 0 if OK, -error on failure.
527 **/
scsi_dev_info_list_add_str(char * dev_list)528 static int scsi_dev_info_list_add_str(char *dev_list)
529 {
530 char *vendor, *model, *strflags, *next;
531 char *next_check;
532 int res = 0;
533
534 next = dev_list;
535 if (next && next[0] == '"') {
536 /*
537 * Ignore both the leading and trailing quote.
538 */
539 next++;
540 next_check = ",\"";
541 } else {
542 next_check = ",";
543 }
544
545 /*
546 * For the leading and trailing '"' case, the for loop comes
547 * through the last time with vendor[0] == '\0'.
548 */
549 for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
550 && (res == 0); vendor = strsep(&next, ":")) {
551 strflags = NULL;
552 model = strsep(&next, ":");
553 if (model)
554 strflags = strsep(&next, next_check);
555 if (!model || !strflags) {
556 pr_err("%s: bad dev info string '%s' '%s' '%s'\n",
557 __func__, vendor, model ? model : "",
558 strflags ? strflags : "");
559 res = -EINVAL;
560 } else
561 res = scsi_dev_info_list_add(0 /* compatible */, vendor,
562 model, strflags, 0);
563 }
564 return res;
565 }
566
567 /**
568 * scsi_get_device_flags - get device specific flags from the dynamic
569 * device list.
570 * @sdev: &scsi_device to get flags for
571 * @vendor: vendor name
572 * @model: model name
573 *
574 * Description:
575 * Search the global scsi_dev_info_list (specified by list zero)
576 * for an entry matching @vendor and @model, if found, return the
577 * matching flags value, else return the host or global default
578 * settings. Called during scan time.
579 **/
scsi_get_device_flags(struct scsi_device * sdev,const unsigned char * vendor,const unsigned char * model)580 blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
581 const unsigned char *vendor,
582 const unsigned char *model)
583 {
584 return scsi_get_device_flags_keyed(sdev, vendor, model,
585 SCSI_DEVINFO_GLOBAL);
586 }
587
588
589 /**
590 * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
591 * @sdev: &scsi_device to get flags for
592 * @vendor: vendor name
593 * @model: model name
594 * @key: list to look up
595 *
596 * Description:
597 * Search the scsi_dev_info_list specified by @key for an entry
598 * matching @vendor and @model, if found, return the matching
599 * flags value, else return the host or global default settings.
600 * Called during scan time.
601 **/
scsi_get_device_flags_keyed(struct scsi_device * sdev,const unsigned char * vendor,const unsigned char * model,enum scsi_devinfo_key key)602 blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
603 const unsigned char *vendor,
604 const unsigned char *model,
605 enum scsi_devinfo_key key)
606 {
607 struct scsi_dev_info_list *devinfo;
608
609 devinfo = scsi_dev_info_list_find(vendor, model, key);
610 if (!IS_ERR(devinfo))
611 return devinfo->flags;
612
613 /* key or device not found: return nothing */
614 if (key != SCSI_DEVINFO_GLOBAL)
615 return 0;
616
617 /* except for the global list, where we have an exception */
618 if (sdev->sdev_bflags)
619 return sdev->sdev_bflags;
620
621 return scsi_default_dev_flags;
622 }
623 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
624
625 #ifdef CONFIG_SCSI_PROC_FS
626 struct double_list {
627 struct list_head *top;
628 struct list_head *bottom;
629 };
630
devinfo_seq_show(struct seq_file * m,void * v)631 static int devinfo_seq_show(struct seq_file *m, void *v)
632 {
633 struct double_list *dl = v;
634 struct scsi_dev_info_list_table *devinfo_table =
635 list_entry(dl->top, struct scsi_dev_info_list_table, node);
636 struct scsi_dev_info_list *devinfo =
637 list_entry(dl->bottom, struct scsi_dev_info_list,
638 dev_info_list);
639
640 if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
641 devinfo_table->name)
642 seq_printf(m, "[%s]:\n", devinfo_table->name);
643
644 seq_printf(m, "'%.8s' '%.16s' 0x%llx\n",
645 devinfo->vendor, devinfo->model, devinfo->flags);
646 return 0;
647 }
648
devinfo_seq_start(struct seq_file * m,loff_t * ppos)649 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
650 {
651 struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
652 loff_t pos = *ppos;
653
654 if (!dl)
655 return NULL;
656
657 list_for_each(dl->top, &scsi_dev_info_list) {
658 struct scsi_dev_info_list_table *devinfo_table =
659 list_entry(dl->top, struct scsi_dev_info_list_table,
660 node);
661 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
662 if (pos-- == 0)
663 return dl;
664 }
665
666 kfree(dl);
667 return NULL;
668 }
669
devinfo_seq_next(struct seq_file * m,void * v,loff_t * ppos)670 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
671 {
672 struct double_list *dl = v;
673 struct scsi_dev_info_list_table *devinfo_table =
674 list_entry(dl->top, struct scsi_dev_info_list_table, node);
675
676 ++*ppos;
677 dl->bottom = dl->bottom->next;
678 while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
679 dl->top = dl->top->next;
680 if (dl->top == &scsi_dev_info_list) {
681 kfree(dl);
682 return NULL;
683 }
684 devinfo_table = list_entry(dl->top,
685 struct scsi_dev_info_list_table,
686 node);
687 dl->bottom = devinfo_table->scsi_dev_info_list.next;
688 }
689
690 return dl;
691 }
692
devinfo_seq_stop(struct seq_file * m,void * v)693 static void devinfo_seq_stop(struct seq_file *m, void *v)
694 {
695 kfree(v);
696 }
697
698 static const struct seq_operations scsi_devinfo_seq_ops = {
699 .start = devinfo_seq_start,
700 .next = devinfo_seq_next,
701 .stop = devinfo_seq_stop,
702 .show = devinfo_seq_show,
703 };
704
proc_scsi_devinfo_open(struct inode * inode,struct file * file)705 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
706 {
707 return seq_open(file, &scsi_devinfo_seq_ops);
708 }
709
710 /*
711 * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
712 *
713 * Description: Adds a black/white list entry for vendor and model with an
714 * integer value of flag to the scsi device info list.
715 * To use, echo "vendor:model:flag" > /proc/scsi/device_info
716 */
proc_scsi_devinfo_write(struct file * file,const char __user * buf,size_t length,loff_t * ppos)717 static ssize_t proc_scsi_devinfo_write(struct file *file,
718 const char __user *buf,
719 size_t length, loff_t *ppos)
720 {
721 char *buffer;
722 ssize_t err = length;
723
724 if (!buf || length>PAGE_SIZE)
725 return -EINVAL;
726 if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
727 return -ENOMEM;
728 if (copy_from_user(buffer, buf, length)) {
729 err =-EFAULT;
730 goto out;
731 }
732
733 if (length < PAGE_SIZE)
734 buffer[length] = '\0';
735 else if (buffer[PAGE_SIZE-1]) {
736 err = -EINVAL;
737 goto out;
738 }
739
740 scsi_dev_info_list_add_str(buffer);
741
742 out:
743 free_page((unsigned long)buffer);
744 return err;
745 }
746
747 static const struct proc_ops scsi_devinfo_proc_ops = {
748 .proc_open = proc_scsi_devinfo_open,
749 .proc_read = seq_read,
750 .proc_write = proc_scsi_devinfo_write,
751 .proc_lseek = seq_lseek,
752 .proc_release = seq_release,
753 };
754 #endif /* CONFIG_SCSI_PROC_FS */
755
756 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
757 MODULE_PARM_DESC(dev_flags,
758 "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
759 " list entries for vendor and model with an integer value of flags"
760 " to the scsi device info list");
761
762 module_param_named(default_dev_flags, scsi_default_dev_flags, ullong, 0644);
763 MODULE_PARM_DESC(default_dev_flags,
764 "scsi default device flag uint64_t value");
765
766 /**
767 * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
768 **/
scsi_exit_devinfo(void)769 void scsi_exit_devinfo(void)
770 {
771 #ifdef CONFIG_SCSI_PROC_FS
772 remove_proc_entry("scsi/device_info", NULL);
773 #endif
774
775 scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
776 }
777
778 /**
779 * scsi_dev_info_add_list - add a new devinfo list
780 * @key: key of the list to add
781 * @name: Name of the list to add (for /proc/scsi/device_info)
782 *
783 * Adds the requested list, returns zero on success, -EEXIST if the
784 * key is already registered to a list, or other error on failure.
785 */
scsi_dev_info_add_list(enum scsi_devinfo_key key,const char * name)786 int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name)
787 {
788 struct scsi_dev_info_list_table *devinfo_table =
789 scsi_devinfo_lookup_by_key(key);
790
791 if (!IS_ERR(devinfo_table))
792 /* list already exists */
793 return -EEXIST;
794
795 devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
796
797 if (!devinfo_table)
798 return -ENOMEM;
799
800 INIT_LIST_HEAD(&devinfo_table->node);
801 INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
802 devinfo_table->name = name;
803 devinfo_table->key = key;
804 list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
805
806 return 0;
807 }
808 EXPORT_SYMBOL(scsi_dev_info_add_list);
809
810 /**
811 * scsi_dev_info_remove_list - destroy an added devinfo list
812 * @key: key of the list to destroy
813 *
814 * Iterates over the entire list first, freeing all the values, then
815 * frees the list itself. Returns 0 on success or -EINVAL if the key
816 * can't be found.
817 */
scsi_dev_info_remove_list(enum scsi_devinfo_key key)818 int scsi_dev_info_remove_list(enum scsi_devinfo_key key)
819 {
820 struct list_head *lh, *lh_next;
821 struct scsi_dev_info_list_table *devinfo_table =
822 scsi_devinfo_lookup_by_key(key);
823
824 if (IS_ERR(devinfo_table))
825 /* no such list */
826 return -EINVAL;
827
828 /* remove from the master list */
829 list_del(&devinfo_table->node);
830
831 list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
832 struct scsi_dev_info_list *devinfo;
833
834 devinfo = list_entry(lh, struct scsi_dev_info_list,
835 dev_info_list);
836 kfree(devinfo);
837 }
838 kfree(devinfo_table);
839
840 return 0;
841 }
842 EXPORT_SYMBOL(scsi_dev_info_remove_list);
843
844 /**
845 * scsi_init_devinfo - set up the dynamic device list.
846 *
847 * Description:
848 * Add command line entries from scsi_dev_flags, then add
849 * scsi_static_device_list entries to the scsi device info list.
850 */
scsi_init_devinfo(void)851 int __init scsi_init_devinfo(void)
852 {
853 #ifdef CONFIG_SCSI_PROC_FS
854 struct proc_dir_entry *p;
855 #endif
856 int error, i;
857
858 error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
859 if (error)
860 return error;
861
862 error = scsi_dev_info_list_add_str(scsi_dev_flags);
863 if (error)
864 goto out;
865
866 for (i = 0; scsi_static_device_list[i].vendor; i++) {
867 error = scsi_dev_info_list_add(1 /* compatibile */,
868 scsi_static_device_list[i].vendor,
869 scsi_static_device_list[i].model,
870 NULL,
871 scsi_static_device_list[i].flags);
872 if (error)
873 goto out;
874 }
875
876 #ifdef CONFIG_SCSI_PROC_FS
877 p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_ops);
878 if (!p) {
879 error = -ENOMEM;
880 goto out;
881 }
882 #endif /* CONFIG_SCSI_PROC_FS */
883
884 out:
885 if (error)
886 scsi_exit_devinfo();
887 return error;
888 }
889