1// SPDX-License-Identifier: GPL-2.0
2
3#include <linux/blkdev.h>
4#include <linux/init.h>
5#include <linux/kernel.h>
6#include <linux/module.h>
7#include <linux/moduleparam.h>
8#include <linux/proc_fs.h>
9#include <linux/seq_file.h>
10#include <linux/slab.h>
11
12#include <scsi/scsi_device.h>
13#include <scsi/scsi_devinfo.h>
14
15#include "scsi_priv.h"
16
17
18/*
19 * scsi_dev_info_list: structure to hold black/white listed devices.
20 */
21struct scsi_dev_info_list {
22 struct list_head dev_info_list;
23 char vendor[8];
24 char model[16];
25 blist_flags_t flags;
26 unsigned compatible; /* for use with scsi_static_device_list entries */
27};
28
29struct scsi_dev_info_list_table {
30 struct list_head node; /* our node for being on the master list */
31 struct list_head scsi_dev_info_list; /* head of dev info list */
32 const char *name; /* name of list for /proc (NULL for global) */
33 int key; /* unique numeric identifier */
34};
35
36
37static blist_flags_t scsi_default_dev_flags;
38static LIST_HEAD(scsi_dev_info_list);
39static char scsi_dev_flags[256];
40
41/*
42 * scsi_static_device_list: 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 */
49static 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
269static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
270{
271 struct scsi_dev_info_list_table *devinfo_table;
272
273 list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
274 if (devinfo_table->key == key)
275 return devinfo_table;
276
277 return ERR_PTR(error: -EINVAL);
278}
279
280/*
281 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
282 * devinfo vendor and model strings.
283 */
284static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
285 char *from, int compatible)
286{
287 size_t from_length;
288
289 from_length = strlen(from);
290
291 /*
292 * null pad and null terminate if compatible
293 * otherwise space pad
294 */
295 if (compatible)
296 strscpy_pad(to, from, to_length);
297 else
298 memcpy_and_pad(dest: to, dest_len: to_length, src: from, count: from_length, pad: ' ');
299
300 if (from_length > to_length)
301 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
302 __func__, name, from);
303}
304
305/**
306 * scsi_dev_info_list_add - add one dev_info list entry.
307 * @compatible: if true, null terminate short strings. Otherwise space pad.
308 * @vendor: vendor string
309 * @model: model (product) string
310 * @strflags: integer string
311 * @flags: if strflags NULL, use this flag value
312 *
313 * Description:
314 * Create and add one dev_info entry for @vendor, @model, @strflags or
315 * @flag. If @compatible, add to the tail of the list, do not space
316 * pad, and set devinfo->compatible. The scsi_static_device_list entries
317 * are added with @compatible 1 and @clfags NULL.
318 *
319 * Returns: 0 OK, -error on failure.
320 **/
321static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
322 char *strflags, blist_flags_t flags)
323{
324 return scsi_dev_info_list_add_keyed(compatible, vendor, model,
325 strflags, flags,
326 key: SCSI_DEVINFO_GLOBAL);
327}
328
329/**
330 * scsi_dev_info_list_add_keyed - add one dev_info list entry.
331 * @compatible: if true, null terminate short strings. Otherwise space pad.
332 * @vendor: vendor string
333 * @model: model (product) string
334 * @strflags: integer string
335 * @flags: if strflags NULL, use this flag value
336 * @key: specify list to use
337 *
338 * Description:
339 * Create and add one dev_info entry for @vendor, @model,
340 * @strflags or @flag in list specified by @key. If @compatible,
341 * add to the tail of the list, do not space pad, and set
342 * devinfo->compatible. The scsi_static_device_list entries are
343 * added with @compatible 1 and @clfags NULL.
344 *
345 * Returns: 0 OK, -error on failure.
346 **/
347int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
348 char *strflags, blist_flags_t flags,
349 enum scsi_devinfo_key key)
350{
351 struct scsi_dev_info_list *devinfo;
352 struct scsi_dev_info_list_table *devinfo_table =
353 scsi_devinfo_lookup_by_key(key);
354
355 if (IS_ERR(ptr: devinfo_table))
356 return PTR_ERR(ptr: devinfo_table);
357
358 devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
359 if (!devinfo) {
360 printk(KERN_ERR "%s: no memory\n", __func__);
361 return -ENOMEM;
362 }
363
364 scsi_strcpy_devinfo(name: "vendor", to: devinfo->vendor, to_length: sizeof(devinfo->vendor),
365 from: vendor, compatible);
366 scsi_strcpy_devinfo(name: "model", to: devinfo->model, to_length: sizeof(devinfo->model),
367 from: model, compatible);
368
369 if (strflags) {
370 unsigned long long val;
371 int ret = kstrtoull(s: strflags, base: 0, res: &val);
372
373 if (ret != 0) {
374 kfree(objp: devinfo);
375 return ret;
376 }
377 flags = (__force blist_flags_t)val;
378 }
379 if (flags & __BLIST_UNUSED_MASK) {
380 pr_err("scsi_devinfo (%s:%s): unsupported flags 0x%llx",
381 vendor, model, flags & __BLIST_UNUSED_MASK);
382 kfree(objp: devinfo);
383 return -EINVAL;
384 }
385 devinfo->flags = flags;
386 devinfo->compatible = compatible;
387
388 if (compatible)
389 list_add_tail(new: &devinfo->dev_info_list,
390 head: &devinfo_table->scsi_dev_info_list);
391 else
392 list_add(new: &devinfo->dev_info_list,
393 head: &devinfo_table->scsi_dev_info_list);
394
395 return 0;
396}
397EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
398
399/**
400 * scsi_dev_info_list_find - find a matching dev_info list entry.
401 * @vendor: full vendor string
402 * @model: full model (product) string
403 * @key: specify list to use
404 *
405 * Description:
406 * Finds the first dev_info entry matching @vendor, @model
407 * in list specified by @key.
408 *
409 * Returns: pointer to matching entry, or ERR_PTR on failure.
410 **/
411static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
412 const char *model, enum scsi_devinfo_key key)
413{
414 struct scsi_dev_info_list *devinfo;
415 struct scsi_dev_info_list_table *devinfo_table =
416 scsi_devinfo_lookup_by_key(key);
417 size_t vmax, mmax, mlen;
418 const char *vskip, *mskip;
419
420 if (IS_ERR(ptr: devinfo_table))
421 return (struct scsi_dev_info_list *) devinfo_table;
422
423 /* Prepare for "compatible" matches */
424
425 /*
426 * XXX why skip leading spaces? If an odd INQUIRY
427 * value, that should have been part of the
428 * scsi_static_device_list[] entry, such as " FOO"
429 * rather than "FOO". Since this code is already
430 * here, and we don't know what device it is
431 * trying to work with, leave it as-is.
432 */
433 vmax = sizeof(devinfo->vendor);
434 vskip = vendor;
435 while (vmax > 0 && *vskip == ' ') {
436 vmax--;
437 vskip++;
438 }
439 /* Also skip trailing spaces */
440 while (vmax > 0 && vskip[vmax - 1] == ' ')
441 --vmax;
442
443 mmax = sizeof(devinfo->model);
444 mskip = model;
445 while (mmax > 0 && *mskip == ' ') {
446 mmax--;
447 mskip++;
448 }
449 while (mmax > 0 && mskip[mmax - 1] == ' ')
450 --mmax;
451
452 list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
453 dev_info_list) {
454 if (devinfo->compatible) {
455 /*
456 * vendor strings must be an exact match
457 */
458 if (vmax != strnlen(p: devinfo->vendor,
459 maxlen: sizeof(devinfo->vendor)) ||
460 memcmp(p: devinfo->vendor, q: vskip, size: vmax))
461 continue;
462
463 /*
464 * @model specifies the full string, and
465 * must be larger or equal to devinfo->model
466 */
467 mlen = strnlen(p: devinfo->model, maxlen: sizeof(devinfo->model));
468 if (mmax < mlen || memcmp(p: devinfo->model, q: mskip, size: mlen))
469 continue;
470 return devinfo;
471 } else {
472 if (!memcmp(p: devinfo->vendor, q: vendor,
473 size: sizeof(devinfo->vendor)) &&
474 !memcmp(p: devinfo->model, q: model,
475 size: sizeof(devinfo->model)))
476 return devinfo;
477 }
478 }
479
480 return ERR_PTR(error: -ENOENT);
481}
482
483/**
484 * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
485 * @dev_list: string of device flags to add
486 *
487 * Description:
488 * Parse dev_list, and add entries to the scsi_dev_info_list.
489 * dev_list is of the form "vendor:product:flag,vendor:product:flag".
490 * dev_list is modified via strsep. Can be called for command line
491 * addition, for proc or mabye a sysfs interface.
492 *
493 * Returns: 0 if OK, -error on failure.
494 **/
495static int scsi_dev_info_list_add_str(char *dev_list)
496{
497 char *vendor, *model, *strflags, *next;
498 char *next_check;
499 int res = 0;
500
501 next = dev_list;
502 if (next && next[0] == '"') {
503 /*
504 * Ignore both the leading and trailing quote.
505 */
506 next++;
507 next_check = ",\"";
508 } else {
509 next_check = ",";
510 }
511
512 /*
513 * For the leading and trailing '"' case, the for loop comes
514 * through the last time with vendor[0] == '\0'.
515 */
516 for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
517 && (res == 0); vendor = strsep(&next, ":")) {
518 strflags = NULL;
519 model = strsep(&next, ":");
520 if (model)
521 strflags = strsep(&next, next_check);
522 if (!model || !strflags) {
523 pr_err("%s: bad dev info string '%s' '%s' '%s'\n",
524 __func__, vendor, model ? model : "",
525 strflags ? strflags : "");
526 res = -EINVAL;
527 } else
528 res = scsi_dev_info_list_add(compatible: 0 /* compatible */, vendor,
529 model, strflags, flags: 0);
530 }
531 return res;
532}
533
534/**
535 * scsi_get_device_flags - get device specific flags from the dynamic
536 * device list.
537 * @sdev: &scsi_device to get flags for
538 * @vendor: vendor name
539 * @model: model name
540 *
541 * Description:
542 * Search the global scsi_dev_info_list (specified by list zero)
543 * for an entry matching @vendor and @model, if found, return the
544 * matching flags value, else return the host or global default
545 * settings. Called during scan time.
546 **/
547blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
548 const unsigned char *vendor,
549 const unsigned char *model)
550{
551 return scsi_get_device_flags_keyed(sdev, vendor, model,
552 key: SCSI_DEVINFO_GLOBAL);
553}
554
555
556/**
557 * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
558 * @sdev: &scsi_device to get flags for
559 * @vendor: vendor name
560 * @model: model name
561 * @key: list to look up
562 *
563 * Description:
564 * Search the scsi_dev_info_list specified by @key for an entry
565 * matching @vendor and @model, if found, return the matching
566 * flags value, else return the host or global default settings.
567 * Called during scan time.
568 **/
569blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
570 const unsigned char *vendor,
571 const unsigned char *model,
572 enum scsi_devinfo_key key)
573{
574 struct scsi_dev_info_list *devinfo;
575
576 devinfo = scsi_dev_info_list_find(vendor, model, key);
577 if (!IS_ERR(ptr: devinfo))
578 return devinfo->flags;
579
580 /* key or device not found: return nothing */
581 if (key != SCSI_DEVINFO_GLOBAL)
582 return 0;
583
584 /* except for the global list, where we have an exception */
585 if (sdev->sdev_bflags)
586 return sdev->sdev_bflags;
587
588 return scsi_default_dev_flags;
589}
590EXPORT_SYMBOL(scsi_get_device_flags_keyed);
591
592#ifdef CONFIG_SCSI_PROC_FS
593struct double_list {
594 struct list_head *top;
595 struct list_head *bottom;
596};
597
598static int devinfo_seq_show(struct seq_file *m, void *v)
599{
600 struct double_list *dl = v;
601 struct scsi_dev_info_list_table *devinfo_table =
602 list_entry(dl->top, struct scsi_dev_info_list_table, node);
603 struct scsi_dev_info_list *devinfo =
604 list_entry(dl->bottom, struct scsi_dev_info_list,
605 dev_info_list);
606
607 if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
608 devinfo_table->name)
609 seq_printf(m, fmt: "[%s]:\n", devinfo_table->name);
610
611 seq_printf(m, fmt: "'%.8s' '%.16s' 0x%llx\n",
612 devinfo->vendor, devinfo->model, devinfo->flags);
613 return 0;
614}
615
616static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
617{
618 struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
619 loff_t pos = *ppos;
620
621 if (!dl)
622 return NULL;
623
624 list_for_each(dl->top, &scsi_dev_info_list) {
625 struct scsi_dev_info_list_table *devinfo_table =
626 list_entry(dl->top, struct scsi_dev_info_list_table,
627 node);
628 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
629 if (pos-- == 0)
630 return dl;
631 }
632
633 kfree(objp: dl);
634 return NULL;
635}
636
637static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
638{
639 struct double_list *dl = v;
640 struct scsi_dev_info_list_table *devinfo_table =
641 list_entry(dl->top, struct scsi_dev_info_list_table, node);
642
643 ++*ppos;
644 dl->bottom = dl->bottom->next;
645 while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
646 dl->top = dl->top->next;
647 if (dl->top == &scsi_dev_info_list) {
648 kfree(objp: dl);
649 return NULL;
650 }
651 devinfo_table = list_entry(dl->top,
652 struct scsi_dev_info_list_table,
653 node);
654 dl->bottom = devinfo_table->scsi_dev_info_list.next;
655 }
656
657 return dl;
658}
659
660static void devinfo_seq_stop(struct seq_file *m, void *v)
661{
662 kfree(objp: v);
663}
664
665static const struct seq_operations scsi_devinfo_seq_ops = {
666 .start = devinfo_seq_start,
667 .next = devinfo_seq_next,
668 .stop = devinfo_seq_stop,
669 .show = devinfo_seq_show,
670};
671
672static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
673{
674 return seq_open(file, &scsi_devinfo_seq_ops);
675}
676
677/*
678 * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
679 *
680 * Description: Adds a black/white list entry for vendor and model with an
681 * integer value of flag to the scsi device info list.
682 * To use, echo "vendor:model:flag" > /proc/scsi/device_info
683 */
684static ssize_t proc_scsi_devinfo_write(struct file *file,
685 const char __user *buf,
686 size_t length, loff_t *ppos)
687{
688 char *buffer;
689 ssize_t err = length;
690
691 if (!buf || length>PAGE_SIZE)
692 return -EINVAL;
693 if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
694 return -ENOMEM;
695 if (copy_from_user(to: buffer, from: buf, n: length)) {
696 err =-EFAULT;
697 goto out;
698 }
699
700 if (length < PAGE_SIZE)
701 buffer[length] = '\0';
702 else if (buffer[PAGE_SIZE-1]) {
703 err = -EINVAL;
704 goto out;
705 }
706
707 scsi_dev_info_list_add_str(dev_list: buffer);
708
709out:
710 free_page((unsigned long)buffer);
711 return err;
712}
713
714static const struct proc_ops scsi_devinfo_proc_ops = {
715 .proc_open = proc_scsi_devinfo_open,
716 .proc_read = seq_read,
717 .proc_write = proc_scsi_devinfo_write,
718 .proc_lseek = seq_lseek,
719 .proc_release = seq_release,
720};
721#endif /* CONFIG_SCSI_PROC_FS */
722
723module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
724MODULE_PARM_DESC(dev_flags,
725 "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
726 " list entries for vendor and model with an integer value of flags"
727 " to the scsi device info list");
728
729module_param_named(default_dev_flags, scsi_default_dev_flags, ullong, 0644);
730MODULE_PARM_DESC(default_dev_flags,
731 "scsi default device flag uint64_t value");
732
733/**
734 * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
735 **/
736void scsi_exit_devinfo(void)
737{
738#ifdef CONFIG_SCSI_PROC_FS
739 remove_proc_entry("scsi/device_info", NULL);
740#endif
741
742 scsi_dev_info_remove_list(key: SCSI_DEVINFO_GLOBAL);
743}
744
745/**
746 * scsi_dev_info_add_list - add a new devinfo list
747 * @key: key of the list to add
748 * @name: Name of the list to add (for /proc/scsi/device_info)
749 *
750 * Adds the requested list, returns zero on success, -EEXIST if the
751 * key is already registered to a list, or other error on failure.
752 */
753int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name)
754{
755 struct scsi_dev_info_list_table *devinfo_table =
756 scsi_devinfo_lookup_by_key(key);
757
758 if (!IS_ERR(ptr: devinfo_table))
759 /* list already exists */
760 return -EEXIST;
761
762 devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
763
764 if (!devinfo_table)
765 return -ENOMEM;
766
767 INIT_LIST_HEAD(list: &devinfo_table->node);
768 INIT_LIST_HEAD(list: &devinfo_table->scsi_dev_info_list);
769 devinfo_table->name = name;
770 devinfo_table->key = key;
771 list_add_tail(new: &devinfo_table->node, head: &scsi_dev_info_list);
772
773 return 0;
774}
775EXPORT_SYMBOL(scsi_dev_info_add_list);
776
777/**
778 * scsi_dev_info_remove_list - destroy an added devinfo list
779 * @key: key of the list to destroy
780 *
781 * Iterates over the entire list first, freeing all the values, then
782 * frees the list itself. Returns 0 on success or -EINVAL if the key
783 * can't be found.
784 */
785int scsi_dev_info_remove_list(enum scsi_devinfo_key key)
786{
787 struct list_head *lh, *lh_next;
788 struct scsi_dev_info_list_table *devinfo_table =
789 scsi_devinfo_lookup_by_key(key);
790
791 if (IS_ERR(ptr: devinfo_table))
792 /* no such list */
793 return -EINVAL;
794
795 /* remove from the master list */
796 list_del(entry: &devinfo_table->node);
797
798 list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
799 struct scsi_dev_info_list *devinfo;
800
801 devinfo = list_entry(lh, struct scsi_dev_info_list,
802 dev_info_list);
803 kfree(objp: devinfo);
804 }
805 kfree(objp: devinfo_table);
806
807 return 0;
808}
809EXPORT_SYMBOL(scsi_dev_info_remove_list);
810
811/**
812 * scsi_init_devinfo - set up the dynamic device list.
813 *
814 * Description:
815 * Add command line entries from scsi_dev_flags, then add
816 * scsi_static_device_list entries to the scsi device info list.
817 */
818int __init scsi_init_devinfo(void)
819{
820#ifdef CONFIG_SCSI_PROC_FS
821 struct proc_dir_entry *p;
822#endif
823 int error, i;
824
825 error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
826 if (error)
827 return error;
828
829 error = scsi_dev_info_list_add_str(dev_list: scsi_dev_flags);
830 if (error)
831 goto out;
832
833 for (i = 0; scsi_static_device_list[i].vendor; i++) {
834 error = scsi_dev_info_list_add(compatible: 1 /* compatible */,
835 vendor: scsi_static_device_list[i].vendor,
836 model: scsi_static_device_list[i].model,
837 NULL,
838 flags: scsi_static_device_list[i].flags);
839 if (error)
840 goto out;
841 }
842
843#ifdef CONFIG_SCSI_PROC_FS
844 p = proc_create(name: "scsi/device_info", mode: 0, NULL, proc_ops: &scsi_devinfo_proc_ops);
845 if (!p) {
846 error = -ENOMEM;
847 goto out;
848 }
849#endif /* CONFIG_SCSI_PROC_FS */
850
851 out:
852 if (error)
853 scsi_exit_devinfo();
854 return error;
855}
856

source code of linux/drivers/scsi/scsi_devinfo.c