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 /* This zero-pads the destination */
297 strncpy(to, from, to_length);
298 if (from_length < to_length && !compatible) {
299 /*
300 * space pad the string if it is short.
301 */
302 memset(&to[from_length], ' ', to_length - from_length);
303 }
304 if (from_length > to_length)
305 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
306 __func__, name, from);
307 }
308
309 /**
310 * scsi_dev_info_list_add - add one dev_info list entry.
311 * @compatible: if true, null terminate short strings. Otherwise space pad.
312 * @vendor: vendor string
313 * @model: model (product) string
314 * @strflags: integer string
315 * @flags: if strflags NULL, use this flag value
316 *
317 * Description:
318 * Create and add one dev_info entry for @vendor, @model, @strflags or
319 * @flag. If @compatible, add to the tail of the list, do not space
320 * pad, and set devinfo->compatible. The scsi_static_device_list entries
321 * are added with @compatible 1 and @clfags NULL.
322 *
323 * Returns: 0 OK, -error on failure.
324 **/
scsi_dev_info_list_add(int compatible,char * vendor,char * model,char * strflags,blist_flags_t flags)325 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
326 char *strflags, blist_flags_t flags)
327 {
328 return scsi_dev_info_list_add_keyed(compatible, vendor, model,
329 strflags, flags,
330 SCSI_DEVINFO_GLOBAL);
331 }
332
333 /**
334 * scsi_dev_info_list_add_keyed - add one dev_info list entry.
335 * @compatible: if true, null terminate short strings. Otherwise space pad.
336 * @vendor: vendor string
337 * @model: model (product) string
338 * @strflags: integer string
339 * @flags: if strflags NULL, use this flag value
340 * @key: specify list to use
341 *
342 * Description:
343 * Create and add one dev_info entry for @vendor, @model,
344 * @strflags or @flag in list specified by @key. If @compatible,
345 * add to the tail of the list, do not space pad, and set
346 * devinfo->compatible. The scsi_static_device_list entries are
347 * added with @compatible 1 and @clfags NULL.
348 *
349 * Returns: 0 OK, -error on failure.
350 **/
scsi_dev_info_list_add_keyed(int compatible,char * vendor,char * model,char * strflags,blist_flags_t flags,enum scsi_devinfo_key key)351 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
352 char *strflags, blist_flags_t flags,
353 enum scsi_devinfo_key key)
354 {
355 struct scsi_dev_info_list *devinfo;
356 struct scsi_dev_info_list_table *devinfo_table =
357 scsi_devinfo_lookup_by_key(key);
358
359 if (IS_ERR(devinfo_table))
360 return PTR_ERR(devinfo_table);
361
362 devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
363 if (!devinfo) {
364 printk(KERN_ERR "%s: no memory\n", __func__);
365 return -ENOMEM;
366 }
367
368 scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
369 vendor, compatible);
370 scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
371 model, compatible);
372
373 if (strflags) {
374 unsigned long long val;
375 int ret = kstrtoull(strflags, 0, &val);
376
377 if (ret != 0) {
378 kfree(devinfo);
379 return ret;
380 }
381 flags = (__force blist_flags_t)val;
382 }
383 if (flags & __BLIST_UNUSED_MASK) {
384 pr_err("scsi_devinfo (%s:%s): unsupported flags 0x%llx",
385 vendor, model, flags & __BLIST_UNUSED_MASK);
386 kfree(devinfo);
387 return -EINVAL;
388 }
389 devinfo->flags = flags;
390 devinfo->compatible = compatible;
391
392 if (compatible)
393 list_add_tail(&devinfo->dev_info_list,
394 &devinfo_table->scsi_dev_info_list);
395 else
396 list_add(&devinfo->dev_info_list,
397 &devinfo_table->scsi_dev_info_list);
398
399 return 0;
400 }
401 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
402
403 /**
404 * scsi_dev_info_list_find - find a matching dev_info list entry.
405 * @vendor: full vendor string
406 * @model: full model (product) string
407 * @key: specify list to use
408 *
409 * Description:
410 * Finds the first dev_info entry matching @vendor, @model
411 * in list specified by @key.
412 *
413 * Returns: pointer to matching entry, or ERR_PTR on failure.
414 **/
scsi_dev_info_list_find(const char * vendor,const char * model,enum scsi_devinfo_key key)415 static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
416 const char *model, enum scsi_devinfo_key key)
417 {
418 struct scsi_dev_info_list *devinfo;
419 struct scsi_dev_info_list_table *devinfo_table =
420 scsi_devinfo_lookup_by_key(key);
421 size_t vmax, mmax, mlen;
422 const char *vskip, *mskip;
423
424 if (IS_ERR(devinfo_table))
425 return (struct scsi_dev_info_list *) devinfo_table;
426
427 /* Prepare for "compatible" matches */
428
429 /*
430 * XXX why skip leading spaces? If an odd INQUIRY
431 * value, that should have been part of the
432 * scsi_static_device_list[] entry, such as " FOO"
433 * rather than "FOO". Since this code is already
434 * here, and we don't know what device it is
435 * trying to work with, leave it as-is.
436 */
437 vmax = sizeof(devinfo->vendor);
438 vskip = vendor;
439 while (vmax > 0 && *vskip == ' ') {
440 vmax--;
441 vskip++;
442 }
443 /* Also skip trailing spaces */
444 while (vmax > 0 && vskip[vmax - 1] == ' ')
445 --vmax;
446
447 mmax = sizeof(devinfo->model);
448 mskip = model;
449 while (mmax > 0 && *mskip == ' ') {
450 mmax--;
451 mskip++;
452 }
453 while (mmax > 0 && mskip[mmax - 1] == ' ')
454 --mmax;
455
456 list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
457 dev_info_list) {
458 if (devinfo->compatible) {
459 /*
460 * vendor strings must be an exact match
461 */
462 if (vmax != strnlen(devinfo->vendor,
463 sizeof(devinfo->vendor)) ||
464 memcmp(devinfo->vendor, vskip, vmax))
465 continue;
466
467 /*
468 * @model specifies the full string, and
469 * must be larger or equal to devinfo->model
470 */
471 mlen = strnlen(devinfo->model, sizeof(devinfo->model));
472 if (mmax < mlen || memcmp(devinfo->model, mskip, mlen))
473 continue;
474 return devinfo;
475 } else {
476 if (!memcmp(devinfo->vendor, vendor,
477 sizeof(devinfo->vendor)) &&
478 !memcmp(devinfo->model, model,
479 sizeof(devinfo->model)))
480 return devinfo;
481 }
482 }
483
484 return ERR_PTR(-ENOENT);
485 }
486
487 /**
488 * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
489 * @vendor: vendor string
490 * @model: model (product) string
491 * @key: specify list to use
492 *
493 * Description:
494 * Remove and destroy one dev_info entry for @vendor, @model
495 * in list specified by @key.
496 *
497 * Returns: 0 OK, -error on failure.
498 **/
scsi_dev_info_list_del_keyed(char * vendor,char * model,enum scsi_devinfo_key key)499 int scsi_dev_info_list_del_keyed(char *vendor, char *model,
500 enum scsi_devinfo_key key)
501 {
502 struct scsi_dev_info_list *found;
503
504 found = scsi_dev_info_list_find(vendor, model, key);
505 if (IS_ERR(found))
506 return PTR_ERR(found);
507
508 list_del(&found->dev_info_list);
509 kfree(found);
510 return 0;
511 }
512 EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
513
514 /**
515 * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
516 * @dev_list: string of device flags to add
517 *
518 * Description:
519 * Parse dev_list, and add entries to the scsi_dev_info_list.
520 * dev_list is of the form "vendor:product:flag,vendor:product:flag".
521 * dev_list is modified via strsep. Can be called for command line
522 * addition, for proc or mabye a sysfs interface.
523 *
524 * Returns: 0 if OK, -error on failure.
525 **/
scsi_dev_info_list_add_str(char * dev_list)526 static int scsi_dev_info_list_add_str(char *dev_list)
527 {
528 char *vendor, *model, *strflags, *next;
529 char *next_check;
530 int res = 0;
531
532 next = dev_list;
533 if (next && next[0] == '"') {
534 /*
535 * Ignore both the leading and trailing quote.
536 */
537 next++;
538 next_check = ",\"";
539 } else {
540 next_check = ",";
541 }
542
543 /*
544 * For the leading and trailing '"' case, the for loop comes
545 * through the last time with vendor[0] == '\0'.
546 */
547 for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
548 && (res == 0); vendor = strsep(&next, ":")) {
549 strflags = NULL;
550 model = strsep(&next, ":");
551 if (model)
552 strflags = strsep(&next, next_check);
553 if (!model || !strflags) {
554 printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
555 " '%s'\n", __func__, vendor, model,
556 strflags);
557 res = -EINVAL;
558 } else
559 res = scsi_dev_info_list_add(0 /* compatible */, vendor,
560 model, strflags, 0);
561 }
562 return res;
563 }
564
565 /**
566 * scsi_get_device_flags - get device specific flags from the dynamic
567 * device list.
568 * @sdev: &scsi_device to get flags for
569 * @vendor: vendor name
570 * @model: model name
571 *
572 * Description:
573 * Search the global scsi_dev_info_list (specified by list zero)
574 * for an entry matching @vendor and @model, if found, return the
575 * matching flags value, else return the host or global default
576 * settings. Called during scan time.
577 **/
scsi_get_device_flags(struct scsi_device * sdev,const unsigned char * vendor,const unsigned char * model)578 blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
579 const unsigned char *vendor,
580 const unsigned char *model)
581 {
582 return scsi_get_device_flags_keyed(sdev, vendor, model,
583 SCSI_DEVINFO_GLOBAL);
584 }
585
586
587 /**
588 * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
589 * @sdev: &scsi_device to get flags for
590 * @vendor: vendor name
591 * @model: model name
592 * @key: list to look up
593 *
594 * Description:
595 * Search the scsi_dev_info_list specified by @key for an entry
596 * matching @vendor and @model, if found, return the matching
597 * flags value, else return the host or global default settings.
598 * Called during scan time.
599 **/
scsi_get_device_flags_keyed(struct scsi_device * sdev,const unsigned char * vendor,const unsigned char * model,enum scsi_devinfo_key key)600 blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
601 const unsigned char *vendor,
602 const unsigned char *model,
603 enum scsi_devinfo_key key)
604 {
605 struct scsi_dev_info_list *devinfo;
606
607 devinfo = scsi_dev_info_list_find(vendor, model, key);
608 if (!IS_ERR(devinfo))
609 return devinfo->flags;
610
611 /* key or device not found: return nothing */
612 if (key != SCSI_DEVINFO_GLOBAL)
613 return 0;
614
615 /* except for the global list, where we have an exception */
616 if (sdev->sdev_bflags)
617 return sdev->sdev_bflags;
618
619 return scsi_default_dev_flags;
620 }
621 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
622
623 #ifdef CONFIG_SCSI_PROC_FS
624 struct double_list {
625 struct list_head *top;
626 struct list_head *bottom;
627 };
628
devinfo_seq_show(struct seq_file * m,void * v)629 static int devinfo_seq_show(struct seq_file *m, void *v)
630 {
631 struct double_list *dl = v;
632 struct scsi_dev_info_list_table *devinfo_table =
633 list_entry(dl->top, struct scsi_dev_info_list_table, node);
634 struct scsi_dev_info_list *devinfo =
635 list_entry(dl->bottom, struct scsi_dev_info_list,
636 dev_info_list);
637
638 if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
639 devinfo_table->name)
640 seq_printf(m, "[%s]:\n", devinfo_table->name);
641
642 seq_printf(m, "'%.8s' '%.16s' 0x%llx\n",
643 devinfo->vendor, devinfo->model, devinfo->flags);
644 return 0;
645 }
646
devinfo_seq_start(struct seq_file * m,loff_t * ppos)647 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
648 {
649 struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
650 loff_t pos = *ppos;
651
652 if (!dl)
653 return NULL;
654
655 list_for_each(dl->top, &scsi_dev_info_list) {
656 struct scsi_dev_info_list_table *devinfo_table =
657 list_entry(dl->top, struct scsi_dev_info_list_table,
658 node);
659 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
660 if (pos-- == 0)
661 return dl;
662 }
663
664 kfree(dl);
665 return NULL;
666 }
667
devinfo_seq_next(struct seq_file * m,void * v,loff_t * ppos)668 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
669 {
670 struct double_list *dl = v;
671 struct scsi_dev_info_list_table *devinfo_table =
672 list_entry(dl->top, struct scsi_dev_info_list_table, node);
673
674 ++*ppos;
675 dl->bottom = dl->bottom->next;
676 while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
677 dl->top = dl->top->next;
678 if (dl->top == &scsi_dev_info_list) {
679 kfree(dl);
680 return NULL;
681 }
682 devinfo_table = list_entry(dl->top,
683 struct scsi_dev_info_list_table,
684 node);
685 dl->bottom = devinfo_table->scsi_dev_info_list.next;
686 }
687
688 return dl;
689 }
690
devinfo_seq_stop(struct seq_file * m,void * v)691 static void devinfo_seq_stop(struct seq_file *m, void *v)
692 {
693 kfree(v);
694 }
695
696 static const struct seq_operations scsi_devinfo_seq_ops = {
697 .start = devinfo_seq_start,
698 .next = devinfo_seq_next,
699 .stop = devinfo_seq_stop,
700 .show = devinfo_seq_show,
701 };
702
proc_scsi_devinfo_open(struct inode * inode,struct file * file)703 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
704 {
705 return seq_open(file, &scsi_devinfo_seq_ops);
706 }
707
708 /*
709 * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
710 *
711 * Description: Adds a black/white list entry for vendor and model with an
712 * integer value of flag to the scsi device info list.
713 * To use, echo "vendor:model:flag" > /proc/scsi/device_info
714 */
proc_scsi_devinfo_write(struct file * file,const char __user * buf,size_t length,loff_t * ppos)715 static ssize_t proc_scsi_devinfo_write(struct file *file,
716 const char __user *buf,
717 size_t length, loff_t *ppos)
718 {
719 char *buffer;
720 ssize_t err = length;
721
722 if (!buf || length>PAGE_SIZE)
723 return -EINVAL;
724 if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
725 return -ENOMEM;
726 if (copy_from_user(buffer, buf, length)) {
727 err =-EFAULT;
728 goto out;
729 }
730
731 if (length < PAGE_SIZE)
732 buffer[length] = '\0';
733 else if (buffer[PAGE_SIZE-1]) {
734 err = -EINVAL;
735 goto out;
736 }
737
738 scsi_dev_info_list_add_str(buffer);
739
740 out:
741 free_page((unsigned long)buffer);
742 return err;
743 }
744
745 static const struct proc_ops scsi_devinfo_proc_ops = {
746 .proc_open = proc_scsi_devinfo_open,
747 .proc_read = seq_read,
748 .proc_write = proc_scsi_devinfo_write,
749 .proc_lseek = seq_lseek,
750 .proc_release = seq_release,
751 };
752 #endif /* CONFIG_SCSI_PROC_FS */
753
754 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
755 MODULE_PARM_DESC(dev_flags,
756 "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
757 " list entries for vendor and model with an integer value of flags"
758 " to the scsi device info list");
759
760 module_param_named(default_dev_flags, scsi_default_dev_flags, ullong, 0644);
761 MODULE_PARM_DESC(default_dev_flags,
762 "scsi default device flag uint64_t value");
763
764 /**
765 * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
766 **/
scsi_exit_devinfo(void)767 void scsi_exit_devinfo(void)
768 {
769 #ifdef CONFIG_SCSI_PROC_FS
770 remove_proc_entry("scsi/device_info", NULL);
771 #endif
772
773 scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
774 }
775
776 /**
777 * scsi_dev_info_add_list - add a new devinfo list
778 * @key: key of the list to add
779 * @name: Name of the list to add (for /proc/scsi/device_info)
780 *
781 * Adds the requested list, returns zero on success, -EEXIST if the
782 * key is already registered to a list, or other error on failure.
783 */
scsi_dev_info_add_list(enum scsi_devinfo_key key,const char * name)784 int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name)
785 {
786 struct scsi_dev_info_list_table *devinfo_table =
787 scsi_devinfo_lookup_by_key(key);
788
789 if (!IS_ERR(devinfo_table))
790 /* list already exists */
791 return -EEXIST;
792
793 devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
794
795 if (!devinfo_table)
796 return -ENOMEM;
797
798 INIT_LIST_HEAD(&devinfo_table->node);
799 INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
800 devinfo_table->name = name;
801 devinfo_table->key = key;
802 list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
803
804 return 0;
805 }
806 EXPORT_SYMBOL(scsi_dev_info_add_list);
807
808 /**
809 * scsi_dev_info_remove_list - destroy an added devinfo list
810 * @key: key of the list to destroy
811 *
812 * Iterates over the entire list first, freeing all the values, then
813 * frees the list itself. Returns 0 on success or -EINVAL if the key
814 * can't be found.
815 */
scsi_dev_info_remove_list(enum scsi_devinfo_key key)816 int scsi_dev_info_remove_list(enum scsi_devinfo_key key)
817 {
818 struct list_head *lh, *lh_next;
819 struct scsi_dev_info_list_table *devinfo_table =
820 scsi_devinfo_lookup_by_key(key);
821
822 if (IS_ERR(devinfo_table))
823 /* no such list */
824 return -EINVAL;
825
826 /* remove from the master list */
827 list_del(&devinfo_table->node);
828
829 list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
830 struct scsi_dev_info_list *devinfo;
831
832 devinfo = list_entry(lh, struct scsi_dev_info_list,
833 dev_info_list);
834 kfree(devinfo);
835 }
836 kfree(devinfo_table);
837
838 return 0;
839 }
840 EXPORT_SYMBOL(scsi_dev_info_remove_list);
841
842 /**
843 * scsi_init_devinfo - set up the dynamic device list.
844 *
845 * Description:
846 * Add command line entries from scsi_dev_flags, then add
847 * scsi_static_device_list entries to the scsi device info list.
848 */
scsi_init_devinfo(void)849 int __init scsi_init_devinfo(void)
850 {
851 #ifdef CONFIG_SCSI_PROC_FS
852 struct proc_dir_entry *p;
853 #endif
854 int error, i;
855
856 error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
857 if (error)
858 return error;
859
860 error = scsi_dev_info_list_add_str(scsi_dev_flags);
861 if (error)
862 goto out;
863
864 for (i = 0; scsi_static_device_list[i].vendor; i++) {
865 error = scsi_dev_info_list_add(1 /* compatibile */,
866 scsi_static_device_list[i].vendor,
867 scsi_static_device_list[i].model,
868 NULL,
869 scsi_static_device_list[i].flags);
870 if (error)
871 goto out;
872 }
873
874 #ifdef CONFIG_SCSI_PROC_FS
875 p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_ops);
876 if (!p) {
877 error = -ENOMEM;
878 goto out;
879 }
880 #endif /* CONFIG_SCSI_PROC_FS */
881
882 out:
883 if (error)
884 scsi_exit_devinfo();
885 return error;
886 }
887