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: list of devices that require settings that differ
43 * from the default, includes black-listed (broken) devices. The entries here
44 * are added to the tail of scsi_dev_info_list via scsi_dev_info_list_init.
45 *
46 * If possible, set the BLIST_* flags from inside a SCSI LLD rather than
47 * adding an entry to this list.
48 */
49 static struct {
50 char *vendor;
51 char *model;
52 char *revision; /* revision known to be bad, unused */
53 blist_flags_t flags;
54 } scsi_static_device_list[] __initdata = {
55 /*
56 * The following devices are known not to tolerate a lun != 0 scan
57 * for one reason or another. Some will respond to all luns,
58 * others will lock up.
59 */
60 {"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN}, /* locks up */
61 {"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN}, /* locks up */
62 {"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN}, /* locks up */
63 {"DENON", "DRD-25X", "V", BLIST_NOLUN}, /* locks up */
64 {"HITACHI", "DK312C", "CM81", BLIST_NOLUN}, /* responds to all lun */
65 {"HITACHI", "DK314C", "CR21", BLIST_NOLUN}, /* responds to all lun */
66 {"IBM", "2104-DU3", NULL, BLIST_NOLUN}, /* locks up */
67 {"IBM", "2104-TU3", NULL, BLIST_NOLUN}, /* locks up */
68 {"IMS", "CDD521/10", "2.06", BLIST_NOLUN}, /* locks up */
69 {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN}, /* locks up */
70 {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN}, /* locks up */
71 {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN}, /* locks up */
72 {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN}, /* locks up */
73 {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN}, /* locks up */
74 {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN}, /* responds to all lun */
75 {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN}, /* responds to all lun */
76 {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
77 {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN}, /* responds to all lun */
78 {"RODIME", "RO3000S", "2.33", BLIST_NOLUN}, /* locks up */
79 {"SUN", "SENA", NULL, BLIST_NOLUN}, /* responds to all luns */
80 /*
81 * The following causes a failed REQUEST SENSE on lun 1 for
82 * aha152x controller, which causes SCSI code to reset bus.
83 */
84 {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
85 /*
86 * The following causes a failed REQUEST SENSE on lun 1 for
87 * aha152x controller, which causes SCSI code to reset bus.
88 */
89 {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
90 {"SEAGATE", "ST296", "921", BLIST_NOLUN}, /* responds to all lun */
91 {"SEAGATE", "ST1581", "6538", BLIST_NOLUN}, /* responds to all lun */
92 {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
93 {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
94 {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
95 {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
96 {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
97 {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN}, /* locks up */
98 {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN}, /* locks up */
99 /*
100 * The following causes a failed REQUEST SENSE on lun 1 for
101 * seagate controller, which causes SCSI code to reset bus.
102 */
103 {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
104 {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN}, /* responds to all lun */
105 /*
106 * The following causes a failed REQUEST SENSE on lun 1 for
107 * seagate controller, which causes SCSI code to reset bus.
108 */
109 {"HP", "C1750A", "3226", BLIST_NOLUN}, /* scanjet iic */
110 {"HP", "C1790A", NULL, BLIST_NOLUN}, /* scanjet iip */
111 {"HP", "C2500A", NULL, BLIST_NOLUN}, /* scanjet iicx */
112 {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
113 {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN}, /* responds to all lun */
114 {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN}, /* locks up */
115 {"NEC", "D3856", "0009", BLIST_NOLUN},
116 {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN}, /* locks up */
117 {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN}, /* locks up */
118 {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN}, /* locks up */
119 {"RELISYS", "Scorpio", NULL, BLIST_NOLUN}, /* responds to all lun */
120 {"SANKYO", "CP525", "6.64", BLIST_NOLUN}, /* causes failed REQ SENSE, extra reset */
121 {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN | BLIST_BORKEN},
122 {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
123 {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN}, /* locks up */
124 {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN}, /* locks up */
125 {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN}, /* locks up */
126 {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN}, /* locks up */
127 {"", "Scanner", "1.80", BLIST_NOLUN}, /* responds to all lun */
128
129 /*
130 * Other types of devices that have special flags.
131 * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
132 */
133 {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
134 {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
135 {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
136 {"AIX", "VDASD", NULL, BLIST_TRY_VPD_PAGES | BLIST_NO_VPD_SIZE},
137 {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
138 {"BELKIN", "USB 2 HS-CF", "1.95", BLIST_FORCELUN | BLIST_INQUIRY_36},
139 {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
140 {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
141 {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
142 {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
143 {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN}, /* CMD RAID Controller */
144 {"CNSI", "G7324", NULL, BLIST_SPARSELUN}, /* Chaparral G7324 RAID */
145 {"CNSi", "G8324", NULL, BLIST_SPARSELUN}, /* Chaparral G8324 RAID */
146 {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
147 BLIST_MAX_512 | BLIST_REPORTLUN2}, /* Compaq RA4x00 */
148 {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
149 {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
150 {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
151 {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
152 {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
153 {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
154 {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
155 {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
156 {"DELL", "PV660F PSEUDO", NULL, BLIST_SPARSELUN},
157 {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN}, /* Dell PV 530F */
158 {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
159 {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
160 {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* EMC CLARiiON, storage on LUN 0 */
161 {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* EMC CLARiiON, no storage on LUN 0 */
162 {"EMC", "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
163 {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
164 BLIST_REPORTLUN2 | BLIST_RETRY_ITF},
165 {"EMULEX", "MD21/S2 ESDI", NULL, BLIST_SINGLELUN},
166 {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
167 {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
168 {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
169 {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
170 {"FUJITSU", "ETERNUS_DXM", "*", BLIST_RETRY_ASC_C1},
171 {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
172 {"Generic", "USB Storage-SMC", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36}, /* FW: 0180 and 0207 */
173 {"Generic", "Ultra HS-SD/MMC", "2.09", BLIST_IGN_MEDIA_CHANGE | BLIST_INQUIRY_36},
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 {"HPE", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES},
188 {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
189 {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
190 {"IBM", "2076", NULL, BLIST_NO_VPD_SIZE},
191 {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
192 {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
193 {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
194 {"IOMEGA", "Io20S *F", NULL, BLIST_KEY},
195 {"INSITE", "Floptical F*8I", NULL, BLIST_KEY},
196 {"INSITE", "I325VM", NULL, BLIST_KEY},
197 {"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
198 {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
199 {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
200 {"Marvell", "Console", NULL, BLIST_SKIP_VPD_PAGES},
201 {"Marvell", "91xx Config", "1.01", BLIST_SKIP_VPD_PAGES},
202 {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
203 {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
204 {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
205 {"Medion", "Flash XL MMC/SD", "2.6D", BLIST_FORCELUN},
206 {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
207 {"MICROP", "4110", NULL, BLIST_NOTQ},
208 {"MSFT", "Virtual HD", NULL, BLIST_MAX_1024 | BLIST_NO_RSOC},
209 {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
210 {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
211 {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
212 {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
213 {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
214 {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
215 {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
216 {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
217 {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
218 {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
219 {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
220 {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
221 {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
222 {"Promise", "", NULL, BLIST_SPARSELUN},
223 {"QEMU", "QEMU CD-ROM", NULL, BLIST_SKIP_VPD_PAGES},
224 {"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
225 {"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
226 {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
227 {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
228 {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
229 {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ}, /* Chokes on tagged INQUIRY */
230 {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
231 {"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
232 {"SGI", "RAID3", "*", BLIST_SPARSELUN},
233 {"SGI", "RAID5", "*", BLIST_SPARSELUN},
234 {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
235 {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
236 {"SKhynix", "H28U74301AMR", NULL, BLIST_SKIP_VPD_PAGES},
237 {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
238 {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
239 {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
240 {"STK", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
241 {"NETAPP", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
242 {"LSI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
243 {"ENGENIO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
244 {"LENOVO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
245 {"FUJITSU", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
246 {"SanDisk", "Cruzer Blade", NULL, BLIST_TRY_VPD_PAGES |
247 BLIST_INQUIRY_36},
248 {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
249 {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
250 {"SONY", "TSL", NULL, BLIST_FORCELUN}, /* DDS3 & DDS4 autoloaders */
251 {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
252 {"SUN", "T300", "*", BLIST_SPARSELUN},
253 {"SUN", "T4", "*", BLIST_SPARSELUN},
254 {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
255 {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
256 {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
257 {"Traxdata", "CDR4120", NULL, BLIST_NOLUN}, /* locks up */
258 {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
259 {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
260 {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
261 {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
262 {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
263 {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
264 {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
265 {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
266 { NULL, NULL, NULL, 0 },
267 };
268
scsi_devinfo_lookup_by_key(int key)269 static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
270 {
271 struct scsi_dev_info_list_table *devinfo_table;
272 int found = 0;
273
274 list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
275 if (devinfo_table->key == key) {
276 found = 1;
277 break;
278 }
279 if (!found)
280 return ERR_PTR(-EINVAL);
281
282 return devinfo_table;
283 }
284
285 /*
286 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
287 * devinfo vendor and model strings.
288 */
scsi_strcpy_devinfo(char * name,char * to,size_t to_length,char * from,int compatible)289 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
290 char *from, int compatible)
291 {
292 size_t from_length;
293
294 from_length = strlen(from);
295
296 /*
297 * null pad and null terminate if compatible
298 * otherwise space pad
299 */
300 if (compatible)
301 strscpy_pad(to, from, to_length);
302 else
303 memcpy_and_pad(to, to_length, from, from_length, ' ');
304
305 if (from_length > to_length)
306 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
307 __func__, name, from);
308 }
309
310 /**
311 * scsi_dev_info_list_add - add one dev_info list entry.
312 * @compatible: if true, null terminate short strings. Otherwise space pad.
313 * @vendor: vendor string
314 * @model: model (product) string
315 * @strflags: integer string
316 * @flags: if strflags NULL, use this flag value
317 *
318 * Description:
319 * Create and add one dev_info entry for @vendor, @model, @strflags or
320 * @flag. If @compatible, add to the tail of the list, do not space
321 * pad, and set devinfo->compatible. The scsi_static_device_list entries
322 * are added with @compatible 1 and @clfags NULL.
323 *
324 * Returns: 0 OK, -error on failure.
325 **/
scsi_dev_info_list_add(int compatible,char * vendor,char * model,char * strflags,blist_flags_t flags)326 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
327 char *strflags, blist_flags_t flags)
328 {
329 return scsi_dev_info_list_add_keyed(compatible, vendor, model,
330 strflags, flags,
331 SCSI_DEVINFO_GLOBAL);
332 }
333
334 /**
335 * scsi_dev_info_list_add_keyed - add one dev_info list entry.
336 * @compatible: if true, null terminate short strings. Otherwise space pad.
337 * @vendor: vendor string
338 * @model: model (product) string
339 * @strflags: integer string
340 * @flags: if strflags NULL, use this flag value
341 * @key: specify list to use
342 *
343 * Description:
344 * Create and add one dev_info entry for @vendor, @model,
345 * @strflags or @flag in list specified by @key. If @compatible,
346 * add to the tail of the list, do not space pad, and set
347 * devinfo->compatible. The scsi_static_device_list entries are
348 * added with @compatible 1 and @clfags NULL.
349 *
350 * Returns: 0 OK, -error on failure.
351 **/
scsi_dev_info_list_add_keyed(int compatible,char * vendor,char * model,char * strflags,blist_flags_t flags,enum scsi_devinfo_key key)352 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
353 char *strflags, blist_flags_t flags,
354 enum scsi_devinfo_key key)
355 {
356 struct scsi_dev_info_list *devinfo;
357 struct scsi_dev_info_list_table *devinfo_table =
358 scsi_devinfo_lookup_by_key(key);
359
360 if (IS_ERR(devinfo_table))
361 return PTR_ERR(devinfo_table);
362
363 devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
364 if (!devinfo) {
365 printk(KERN_ERR "%s: no memory\n", __func__);
366 return -ENOMEM;
367 }
368
369 scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
370 vendor, compatible);
371 scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
372 model, compatible);
373
374 if (strflags) {
375 unsigned long long val;
376 int ret = kstrtoull(strflags, 0, &val);
377
378 if (ret != 0) {
379 kfree(devinfo);
380 return ret;
381 }
382 flags = (__force blist_flags_t)val;
383 }
384 if (flags & __BLIST_UNUSED_MASK) {
385 pr_err("scsi_devinfo (%s:%s): unsupported flags 0x%llx",
386 vendor, model, flags & __BLIST_UNUSED_MASK);
387 kfree(devinfo);
388 return -EINVAL;
389 }
390 devinfo->flags = flags;
391 devinfo->compatible = compatible;
392
393 if (compatible)
394 list_add_tail(&devinfo->dev_info_list,
395 &devinfo_table->scsi_dev_info_list);
396 else
397 list_add(&devinfo->dev_info_list,
398 &devinfo_table->scsi_dev_info_list);
399
400 return 0;
401 }
402 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
403
404 /**
405 * scsi_dev_info_list_find - find a matching dev_info list entry.
406 * @vendor: full vendor string
407 * @model: full model (product) string
408 * @key: specify list to use
409 *
410 * Description:
411 * Finds the first dev_info entry matching @vendor, @model
412 * in list specified by @key.
413 *
414 * Returns: pointer to matching entry, or ERR_PTR on failure.
415 **/
scsi_dev_info_list_find(const char * vendor,const char * model,enum scsi_devinfo_key key)416 static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
417 const char *model, enum scsi_devinfo_key key)
418 {
419 struct scsi_dev_info_list *devinfo;
420 struct scsi_dev_info_list_table *devinfo_table =
421 scsi_devinfo_lookup_by_key(key);
422 size_t vmax, mmax, mlen;
423 const char *vskip, *mskip;
424
425 if (IS_ERR(devinfo_table))
426 return (struct scsi_dev_info_list *) devinfo_table;
427
428 /* Prepare for "compatible" matches */
429
430 /*
431 * XXX why skip leading spaces? If an odd INQUIRY
432 * value, that should have been part of the
433 * scsi_static_device_list[] entry, such as " FOO"
434 * rather than "FOO". Since this code is already
435 * here, and we don't know what device it is
436 * trying to work with, leave it as-is.
437 */
438 vmax = sizeof(devinfo->vendor);
439 vskip = vendor;
440 while (vmax > 0 && *vskip == ' ') {
441 vmax--;
442 vskip++;
443 }
444 /* Also skip trailing spaces */
445 while (vmax > 0 && vskip[vmax - 1] == ' ')
446 --vmax;
447
448 mmax = sizeof(devinfo->model);
449 mskip = model;
450 while (mmax > 0 && *mskip == ' ') {
451 mmax--;
452 mskip++;
453 }
454 while (mmax > 0 && mskip[mmax - 1] == ' ')
455 --mmax;
456
457 list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
458 dev_info_list) {
459 if (devinfo->compatible) {
460 /*
461 * vendor strings must be an exact match
462 */
463 if (vmax != strnlen(devinfo->vendor,
464 sizeof(devinfo->vendor)) ||
465 memcmp(devinfo->vendor, vskip, vmax))
466 continue;
467
468 /*
469 * @model specifies the full string, and
470 * must be larger or equal to devinfo->model
471 */
472 mlen = strnlen(devinfo->model, sizeof(devinfo->model));
473 if (mmax < mlen || memcmp(devinfo->model, mskip, mlen))
474 continue;
475 return devinfo;
476 } else {
477 if (!memcmp(devinfo->vendor, vendor,
478 sizeof(devinfo->vendor)) &&
479 !memcmp(devinfo->model, model,
480 sizeof(devinfo->model)))
481 return devinfo;
482 }
483 }
484
485 return ERR_PTR(-ENOENT);
486 }
487
488 /**
489 * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
490 * @dev_list: string of device flags to add
491 *
492 * Description:
493 * Parse dev_list, and add entries to the scsi_dev_info_list.
494 * dev_list is of the form "vendor:product:flag,vendor:product:flag".
495 * dev_list is modified via strsep. Can be called for command line
496 * addition, for proc or mabye a sysfs interface.
497 *
498 * Returns: 0 if OK, -error on failure.
499 **/
scsi_dev_info_list_add_str(char * dev_list)500 static int scsi_dev_info_list_add_str(char *dev_list)
501 {
502 char *vendor, *model, *strflags, *next;
503 char *next_check;
504 int res = 0;
505
506 next = dev_list;
507 if (next && next[0] == '"') {
508 /*
509 * Ignore both the leading and trailing quote.
510 */
511 next++;
512 next_check = ",\"";
513 } else {
514 next_check = ",";
515 }
516
517 /*
518 * For the leading and trailing '"' case, the for loop comes
519 * through the last time with vendor[0] == '\0'.
520 */
521 for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
522 && (res == 0); vendor = strsep(&next, ":")) {
523 strflags = NULL;
524 model = strsep(&next, ":");
525 if (model)
526 strflags = strsep(&next, next_check);
527 if (!model || !strflags) {
528 pr_err("%s: bad dev info string '%s' '%s' '%s'\n",
529 __func__, vendor, model ? model : "",
530 strflags ? strflags : "");
531 res = -EINVAL;
532 } else
533 res = scsi_dev_info_list_add(0 /* compatible */, vendor,
534 model, strflags, 0);
535 }
536 return res;
537 }
538
539 /**
540 * scsi_get_device_flags - get device specific flags from the dynamic
541 * device list.
542 * @sdev: &scsi_device to get flags for
543 * @vendor: vendor name
544 * @model: model name
545 *
546 * Description:
547 * Search the global scsi_dev_info_list (specified by list zero)
548 * for an entry matching @vendor and @model, if found, return the
549 * matching flags value, else return the host or global default
550 * settings. Called during scan time.
551 **/
scsi_get_device_flags(struct scsi_device * sdev,const unsigned char * vendor,const unsigned char * model)552 blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
553 const unsigned char *vendor,
554 const unsigned char *model)
555 {
556 return scsi_get_device_flags_keyed(sdev, vendor, model,
557 SCSI_DEVINFO_GLOBAL);
558 }
559
560
561 /**
562 * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
563 * @sdev: &scsi_device to get flags for
564 * @vendor: vendor name
565 * @model: model name
566 * @key: list to look up
567 *
568 * Description:
569 * Search the scsi_dev_info_list specified by @key for an entry
570 * matching @vendor and @model, if found, return the matching
571 * flags value, else return the host or global default settings.
572 * Called during scan time.
573 **/
scsi_get_device_flags_keyed(struct scsi_device * sdev,const unsigned char * vendor,const unsigned char * model,enum scsi_devinfo_key key)574 blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
575 const unsigned char *vendor,
576 const unsigned char *model,
577 enum scsi_devinfo_key key)
578 {
579 struct scsi_dev_info_list *devinfo;
580
581 devinfo = scsi_dev_info_list_find(vendor, model, key);
582 if (!IS_ERR(devinfo))
583 return devinfo->flags;
584
585 /* key or device not found: return nothing */
586 if (key != SCSI_DEVINFO_GLOBAL)
587 return 0;
588
589 /* except for the global list, where we have an exception */
590 if (sdev->sdev_bflags)
591 return sdev->sdev_bflags;
592
593 return scsi_default_dev_flags;
594 }
595 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
596
597 #ifdef CONFIG_SCSI_PROC_FS
598 struct double_list {
599 struct list_head *top;
600 struct list_head *bottom;
601 };
602
devinfo_seq_show(struct seq_file * m,void * v)603 static int devinfo_seq_show(struct seq_file *m, void *v)
604 {
605 struct double_list *dl = v;
606 struct scsi_dev_info_list_table *devinfo_table =
607 list_entry(dl->top, struct scsi_dev_info_list_table, node);
608 struct scsi_dev_info_list *devinfo =
609 list_entry(dl->bottom, struct scsi_dev_info_list,
610 dev_info_list);
611
612 if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
613 devinfo_table->name)
614 seq_printf(m, "[%s]:\n", devinfo_table->name);
615
616 seq_printf(m, "'%.8s' '%.16s' 0x%llx\n",
617 devinfo->vendor, devinfo->model, devinfo->flags);
618 return 0;
619 }
620
devinfo_seq_start(struct seq_file * m,loff_t * ppos)621 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
622 {
623 struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
624 loff_t pos = *ppos;
625
626 if (!dl)
627 return NULL;
628
629 list_for_each(dl->top, &scsi_dev_info_list) {
630 struct scsi_dev_info_list_table *devinfo_table =
631 list_entry(dl->top, struct scsi_dev_info_list_table,
632 node);
633 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
634 if (pos-- == 0)
635 return dl;
636 }
637
638 kfree(dl);
639 return NULL;
640 }
641
devinfo_seq_next(struct seq_file * m,void * v,loff_t * ppos)642 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
643 {
644 struct double_list *dl = v;
645 struct scsi_dev_info_list_table *devinfo_table =
646 list_entry(dl->top, struct scsi_dev_info_list_table, node);
647
648 ++*ppos;
649 dl->bottom = dl->bottom->next;
650 while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
651 dl->top = dl->top->next;
652 if (dl->top == &scsi_dev_info_list) {
653 kfree(dl);
654 return NULL;
655 }
656 devinfo_table = list_entry(dl->top,
657 struct scsi_dev_info_list_table,
658 node);
659 dl->bottom = devinfo_table->scsi_dev_info_list.next;
660 }
661
662 return dl;
663 }
664
devinfo_seq_stop(struct seq_file * m,void * v)665 static void devinfo_seq_stop(struct seq_file *m, void *v)
666 {
667 kfree(v);
668 }
669
670 static const struct seq_operations scsi_devinfo_seq_ops = {
671 .start = devinfo_seq_start,
672 .next = devinfo_seq_next,
673 .stop = devinfo_seq_stop,
674 .show = devinfo_seq_show,
675 };
676
proc_scsi_devinfo_open(struct inode * inode,struct file * file)677 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
678 {
679 return seq_open(file, &scsi_devinfo_seq_ops);
680 }
681
682 /*
683 * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
684 *
685 * Description: Adds a black/white list entry for vendor and model with an
686 * integer value of flag to the scsi device info list.
687 * To use, echo "vendor:model:flag" > /proc/scsi/device_info
688 */
proc_scsi_devinfo_write(struct file * file,const char __user * buf,size_t length,loff_t * ppos)689 static ssize_t proc_scsi_devinfo_write(struct file *file,
690 const char __user *buf,
691 size_t length, loff_t *ppos)
692 {
693 char *buffer;
694 ssize_t err = length;
695
696 if (!buf || length>PAGE_SIZE)
697 return -EINVAL;
698 if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
699 return -ENOMEM;
700 if (copy_from_user(buffer, buf, length)) {
701 err =-EFAULT;
702 goto out;
703 }
704
705 if (length < PAGE_SIZE)
706 buffer[length] = '\0';
707 else if (buffer[PAGE_SIZE-1]) {
708 err = -EINVAL;
709 goto out;
710 }
711
712 scsi_dev_info_list_add_str(buffer);
713
714 out:
715 free_page((unsigned long)buffer);
716 return err;
717 }
718
719 static const struct proc_ops scsi_devinfo_proc_ops = {
720 .proc_open = proc_scsi_devinfo_open,
721 .proc_read = seq_read,
722 .proc_write = proc_scsi_devinfo_write,
723 .proc_lseek = seq_lseek,
724 .proc_release = seq_release,
725 };
726 #endif /* CONFIG_SCSI_PROC_FS */
727
728 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
729 MODULE_PARM_DESC(dev_flags,
730 "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
731 " list entries for vendor and model with an integer value of flags"
732 " to the scsi device info list");
733
734 module_param_named(default_dev_flags, scsi_default_dev_flags, ullong, 0644);
735 MODULE_PARM_DESC(default_dev_flags,
736 "scsi default device flag uint64_t value");
737
738 /**
739 * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
740 **/
scsi_exit_devinfo(void)741 void scsi_exit_devinfo(void)
742 {
743 #ifdef CONFIG_SCSI_PROC_FS
744 remove_proc_entry("scsi/device_info", NULL);
745 #endif
746
747 scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
748 }
749
750 /**
751 * scsi_dev_info_add_list - add a new devinfo list
752 * @key: key of the list to add
753 * @name: Name of the list to add (for /proc/scsi/device_info)
754 *
755 * Adds the requested list, returns zero on success, -EEXIST if the
756 * key is already registered to a list, or other error on failure.
757 */
scsi_dev_info_add_list(enum scsi_devinfo_key key,const char * name)758 int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name)
759 {
760 struct scsi_dev_info_list_table *devinfo_table =
761 scsi_devinfo_lookup_by_key(key);
762
763 if (!IS_ERR(devinfo_table))
764 /* list already exists */
765 return -EEXIST;
766
767 devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
768
769 if (!devinfo_table)
770 return -ENOMEM;
771
772 INIT_LIST_HEAD(&devinfo_table->node);
773 INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
774 devinfo_table->name = name;
775 devinfo_table->key = key;
776 list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
777
778 return 0;
779 }
780 EXPORT_SYMBOL(scsi_dev_info_add_list);
781
782 /**
783 * scsi_dev_info_remove_list - destroy an added devinfo list
784 * @key: key of the list to destroy
785 *
786 * Iterates over the entire list first, freeing all the values, then
787 * frees the list itself. Returns 0 on success or -EINVAL if the key
788 * can't be found.
789 */
scsi_dev_info_remove_list(enum scsi_devinfo_key key)790 int scsi_dev_info_remove_list(enum scsi_devinfo_key key)
791 {
792 struct list_head *lh, *lh_next;
793 struct scsi_dev_info_list_table *devinfo_table =
794 scsi_devinfo_lookup_by_key(key);
795
796 if (IS_ERR(devinfo_table))
797 /* no such list */
798 return -EINVAL;
799
800 /* remove from the master list */
801 list_del(&devinfo_table->node);
802
803 list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
804 struct scsi_dev_info_list *devinfo;
805
806 devinfo = list_entry(lh, struct scsi_dev_info_list,
807 dev_info_list);
808 kfree(devinfo);
809 }
810 kfree(devinfo_table);
811
812 return 0;
813 }
814 EXPORT_SYMBOL(scsi_dev_info_remove_list);
815
816 /**
817 * scsi_init_devinfo - set up the dynamic device list.
818 *
819 * Description:
820 * Add command line entries from scsi_dev_flags, then add
821 * scsi_static_device_list entries to the scsi device info list.
822 */
scsi_init_devinfo(void)823 int __init scsi_init_devinfo(void)
824 {
825 #ifdef CONFIG_SCSI_PROC_FS
826 struct proc_dir_entry *p;
827 #endif
828 int error, i;
829
830 error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
831 if (error)
832 return error;
833
834 error = scsi_dev_info_list_add_str(scsi_dev_flags);
835 if (error)
836 goto out;
837
838 for (i = 0; scsi_static_device_list[i].vendor; i++) {
839 error = scsi_dev_info_list_add(1 /* compatible */,
840 scsi_static_device_list[i].vendor,
841 scsi_static_device_list[i].model,
842 NULL,
843 scsi_static_device_list[i].flags);
844 if (error)
845 goto out;
846 }
847
848 #ifdef CONFIG_SCSI_PROC_FS
849 p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_ops);
850 if (!p) {
851 error = -ENOMEM;
852 goto out;
853 }
854 #endif /* CONFIG_SCSI_PROC_FS */
855
856 out:
857 if (error)
858 scsi_exit_devinfo();
859 return error;
860 }
861