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sd: Avoid sending medium write commands if device is write protected
[mirror_ubuntu-artful-kernel.git] / drivers / scsi / scsi_devinfo.c
CommitLineData
1da177e4
LT		 1
2#include <linux/blkdev.h>
3#include <linux/init.h>
4#include <linux/kernel.h>
5#include <linux/module.h>
6#include <linux/moduleparam.h>
7#include <linux/proc_fs.h>
8#include <linux/seq_file.h>
5a0e3ad6 9#include <linux/slab.h>
1da177e4
LT		 10
11#include <scsi/scsi_device.h>
12#include <scsi/scsi_devinfo.h>
13
14#include "scsi_priv.h"
15
16
17/*
18 * scsi_dev_info_list: structure to hold black/white listed devices.
19 */
20struct scsi_dev_info_list {
21 struct list_head dev_info_list;
22 char vendor[8];
23 char model[16];
24 unsigned flags;
25 unsigned compatible; /* for use with scsi_static_device_list entries */
26};
27
598fa4b7
JB		 28struct scsi_dev_info_list_table {
29 struct list_head node; /* our node for being on the master list */
30 struct list_head scsi_dev_info_list; /* head of dev info list */
31 const char *name; /* name of list for /proc (NULL for global) */
32 int key; /* unique numeric identifier */
33};
34
1da177e4
LT		 35
36static const char spaces[] = " "; /* 16 of them */
37static unsigned scsi_default_dev_flags;
38static LIST_HEAD(scsi_dev_info_list);
39static char scsi_dev_flags[256];
40
41/*
42 * scsi_static_device_list: deprecated list of devices that require
43 * settings that differ from the default, includes black-listed (broken)
44 * devices. The entries here are added to the tail of scsi_dev_info_list
45 * via scsi_dev_info_list_init.
46 *
47 * Do not add to this list, use the command line or proc interface to add
48 * to the scsi_dev_info_list. This table will eventually go away.
49 */
50static struct {
51 char *vendor;
52 char *model;
53 char *revision; /* revision known to be bad, unused */
54 unsigned 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 */
f2536cbd
BK		 67 {"IBM", "2104-DU3", NULL, BLIST_NOLUN}, /* locks up */
68 {"IBM", "2104-TU3", NULL, BLIST_NOLUN}, /* locks up */
1da177e4
LT		 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", "", BLIST_NOLUN}, /* scanjet iip */
112 {"HP", "C2500A", "", 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},
1c536315 123 {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
1da177e4
LT		 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 */
0d7323c8 128 {"", "Scanner", "1.80", BLIST_NOLUN}, /* responds to all lun */
1da177e4
LT		 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 {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
138 {"BELKIN", "USB 2 HS-CF", "1.95", BLIST_FORCELUN | BLIST_INQUIRY_36},
80dc3e06 139 {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
98acfc7e 140 {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
1da177e4
LT		 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 */
4d7db04a
JB		 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 */
1da177e4
LT		 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},
507caac7 154 {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
1da177e4
LT		 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}, /* Dell PV 650F, storage on LUN 0 */
161 {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
3441afc6 162 {"EMC", "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
1da177e4
LT		 163 {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
164 {"EMULEX", "MD21/S2 ESDI", NULL, BLIST_SINGLELUN},
80b1c7bd
AM		 165 {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
166 {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
167 {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
1da177e4
LT		 168 {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
169 {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
170 {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
171 {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
627511e3
TY		 172 {"HITACHI", "DF400", "*", BLIST_REPORTLUN2},
173 {"HITACHI", "DF500", "*", BLIST_REPORTLUN2},
174 {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
d974e426 175 {"HITACHI", "HUS1530", "*", BLIST_NO_DIF},
627511e3 176 {"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2},
f70cfa9b
MC		 177 {"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
178 {"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
179 {"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
180 {"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
181 {"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
1da177e4 182 {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP VA7400 */
9ba0883c 183 {"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
1da177e4
LT		 184 {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
185 {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
186 {"HP", "C1557A", NULL, BLIST_FORCELUN},
187 {"HP", "C3323-300", "4269", BLIST_NOTQ},
c3d83368 188 {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
f70cfa9b
MC		 189 {"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
190 {"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
191 {"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
192 {"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
193 {"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
194 {"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
195 {"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
196 {"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
1da177e4
LT		 197 {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
198 {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
199 {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
200 {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
82103978 201 {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
1da177e4
LT		 202 {"IOMEGA", "Io20S *F", NULL, BLIST_KEY},
203 {"INSITE", "Floptical F*8I", NULL, BLIST_KEY},
204 {"INSITE", "I325VM", NULL, BLIST_KEY},
205 {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
206 {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
207 {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
208 {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
209 {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
210 {"Medion", "Flash XL MMC/SD", "2.6D", BLIST_FORCELUN},
211 {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
212 {"MICROP", "4110", NULL, BLIST_NOTQ},
213 {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
214 {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
215 {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
216 {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
217 {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
12427d99 218 {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
1da177e4
LT		 219 {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
220 {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
221 {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
222 {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
223 {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
f4fd20bf 224 {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
0213436a 225 {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
e0b2e597 226 {"Promise", "", NULL, BLIST_SPARSELUN},
2ffb45c6 227 {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
1da177e4
LT		 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},
56f2a801 232 {"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
1da177e4
LT		 233 {"SGI", "RAID3", "*", BLIST_SPARSELUN},
234 {"SGI", "RAID5", "*", BLIST_SPARSELUN},
235 {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
236 {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
48690405 237 {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
debf4777 238 {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
4aa312b9 239 {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
1da177e4
LT		 240 {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
241 {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
242 {"SONY", "TSL", NULL, BLIST_FORCELUN}, /* DDS3 & DDS4 autoloaders */
243 {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
244 {"SUN", "T300", "*", BLIST_SPARSELUN},
245 {"SUN", "T4", "*", BLIST_SPARSELUN},
246 {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
5f619c5b 247 {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
1da177e4
LT		 248 {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
249 {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
82103978 250 {"Traxdata", "CDR4120", NULL, BLIST_NOLUN}, /* locks up */
1da177e4
LT		 251 {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
252 {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
253 {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
254 {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
255 {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
256 {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
257 {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
258 {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
259 { NULL, NULL, NULL, 0 },
260};
261
598fa4b7
JB		 262static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
263{
264 struct scsi_dev_info_list_table *devinfo_table;
265 int found = 0;
266
267 list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
268 if (devinfo_table->key == key) {
269 found = 1;
270 break;
271 }
272 if (!found)
273 return ERR_PTR(-EINVAL);
274
275 return devinfo_table;
276}
277
1da177e4
LT		 278/*
279 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
280 * devinfo vendor and model strings.
281 */
282static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
283 char *from, int compatible)
284{
285 size_t from_length;
286
287 from_length = strlen(from);
288 strncpy(to, from, min(to_length, from_length));
289 if (from_length < to_length) {
290 if (compatible) {
291 /*
292 * NUL terminate the string if it is short.
293 */
294 to[from_length] = '\0';
295 } else {
296 /*
297 * space pad the string if it is short.
298 */
299 strncpy(&to[from_length], spaces,
300 to_length - from_length);
301 }
302 }
303 if (from_length > to_length)
304 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
cadbd4a5 305 __func__, name, from);
1da177e4
LT		 306}
307
308/**
eb44820c
RL		 309 * scsi_dev_info_list_add - add one dev_info list entry.
310 * @compatible: if true, null terminate short strings. Otherwise space pad.
1da177e4
LT		 311 * @vendor: vendor string
312 * @model: model (product) string
313 * @strflags: integer string
eb44820c 314 * @flags: if strflags NULL, use this flag value
1da177e4
LT		 315 *
316 * Description:
317 * Create and add one dev_info entry for @vendor, @model, @strflags or
318 * @flag. If @compatible, add to the tail of the list, do not space
319 * pad, and set devinfo->compatible. The scsi_static_device_list entries
320 * are added with @compatible 1 and @clfags NULL.
321 *
322 * Returns: 0 OK, -error on failure.
323 **/
324static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
325 char *strflags, int flags)
598fa4b7
JB		 326{
327 return scsi_dev_info_list_add_keyed(compatible, vendor, model,
328 strflags, flags,
329 SCSI_DEVINFO_GLOBAL);
330}
331
332/**
333 * scsi_dev_info_list_add_keyed - add one dev_info list entry.
334 * @compatible: if true, null terminate short strings. Otherwise space pad.
335 * @vendor: vendor string
336 * @model: model (product) string
337 * @strflags: integer string
338 * @flags: if strflags NULL, use this flag value
339 * @key: specify list to use
340 *
341 * Description:
342 * Create and add one dev_info entry for @vendor, @model,
343 * @strflags or @flag in list specified by @key. If @compatible,
344 * add to the tail of the list, do not space pad, and set
345 * devinfo->compatible. The scsi_static_device_list entries are
346 * added with @compatible 1 and @clfags NULL.
347 *
348 * Returns: 0 OK, -error on failure.
349 **/
350int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
351 char *strflags, int flags, int key)
1da177e4
LT		 352{
353 struct scsi_dev_info_list *devinfo;
598fa4b7
JB		 354 struct scsi_dev_info_list_table *devinfo_table =
355 scsi_devinfo_lookup_by_key(key);
356
357 if (IS_ERR(devinfo_table))
358 return PTR_ERR(devinfo_table);
1da177e4
LT		 359
360 devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
361 if (!devinfo) {
cadbd4a5 362 printk(KERN_ERR "%s: no memory\n", __func__);
1da177e4
LT		 363 return -ENOMEM;
364 }
365
366 scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
367 vendor, compatible);
368 scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
369 model, compatible);
370
371 if (strflags)
372 devinfo->flags = simple_strtoul(strflags, NULL, 0);
373 else
374 devinfo->flags = flags;
375
376 devinfo->compatible = compatible;
377
378 if (compatible)
598fa4b7
JB		 379 list_add_tail(&devinfo->dev_info_list,
380 &devinfo_table->scsi_dev_info_list);
1da177e4 381 else
598fa4b7
JB		 382 list_add(&devinfo->dev_info_list,
383 &devinfo_table->scsi_dev_info_list);
1da177e4
LT		 384
385 return 0;
386}
598fa4b7 387EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
1da177e4 388
38a039be
PJ		 389/**
390 * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
391 * @vendor: vendor string
392 * @model: model (product) string
393 * @key: specify list to use
394 *
395 * Description:
396 * Remove and destroy one dev_info entry for @vendor, @model
397 * in list specified by @key.
398 *
399 * Returns: 0 OK, -error on failure.
400 **/
401int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key)
402{
403 struct scsi_dev_info_list *devinfo, *found = NULL;
404 struct scsi_dev_info_list_table *devinfo_table =
405 scsi_devinfo_lookup_by_key(key);
406
407 if (IS_ERR(devinfo_table))
408 return PTR_ERR(devinfo_table);
409
410 list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
411 dev_info_list) {
412 if (devinfo->compatible) {
413 /*
414 * Behave like the older version of get_device_flags.
415 */
416 size_t max;
417 /*
418 * XXX why skip leading spaces? If an odd INQUIRY
419 * value, that should have been part of the
420 * scsi_static_device_list[] entry, such as " FOO"
421 * rather than "FOO". Since this code is already
422 * here, and we don't know what device it is
423 * trying to work with, leave it as-is.
424 */
425 max = 8; /* max length of vendor */
426 while ((max > 0) && *vendor == ' ') {
427 max--;
428 vendor++;
429 }
430 /*
431 * XXX removing the following strlen() would be
432 * good, using it means that for a an entry not in
433 * the list, we scan every byte of every vendor
434 * listed in scsi_static_device_list[], and never match
435 * a single one (and still have to compare at
436 * least the first byte of each vendor).
437 */
438 if (memcmp(devinfo->vendor, vendor,
439 min(max, strlen(devinfo->vendor))))
440 continue;
441 /*
442 * Skip spaces again.
443 */
444 max = 16; /* max length of model */
445 while ((max > 0) && *model == ' ') {
446 max--;
447 model++;
448 }
449 if (memcmp(devinfo->model, model,
450 min(max, strlen(devinfo->model))))
451 continue;
452 found = devinfo;
453 } else {
454 if (!memcmp(devinfo->vendor, vendor,
455 sizeof(devinfo->vendor)) &&
456 !memcmp(devinfo->model, model,
457 sizeof(devinfo->model)))
458 found = devinfo;
459 }
460 if (found)
461 break;
462 }
463
464 if (found) {
465 list_del(&found->dev_info_list);
466 kfree(found);
467 return 0;
468 }
469
470 return -ENOENT;
471}
472EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
473
1da177e4 474/**
eb44820c 475 * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
1da177e4
LT		 476 * @dev_list: string of device flags to add
477 *
478 * Description:
479 * Parse dev_list, and add entries to the scsi_dev_info_list.
480 * dev_list is of the form "vendor:product:flag,vendor:product:flag".
481 * dev_list is modified via strsep. Can be called for command line
482 * addition, for proc or mabye a sysfs interface.
483 *
484 * Returns: 0 if OK, -error on failure.
485 **/
486static int scsi_dev_info_list_add_str(char *dev_list)
487{
488 char *vendor, *model, *strflags, *next;
489 char *next_check;
490 int res = 0;
491
492 next = dev_list;
493 if (next && next[0] == '"') {
494 /*
495 * Ignore both the leading and trailing quote.
496 */
497 next++;
498 next_check = ",\"";
499 } else {
500 next_check = ",";
501 }
502
503 /*
504 * For the leading and trailing '"' case, the for loop comes
505 * through the last time with vendor[0] == '\0'.
506 */
507 for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
508 && (res == 0); vendor = strsep(&next, ":")) {
509 strflags = NULL;
510 model = strsep(&next, ":");
511 if (model)
512 strflags = strsep(&next, next_check);
513 if (!model || !strflags) {
514 printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
cadbd4a5 515 " '%s'\n", __func__, vendor, model,
1da177e4
LT		 516 strflags);
517 res = -EINVAL;
518 } else
519 res = scsi_dev_info_list_add(0 /* compatible */, vendor,
520 model, strflags, 0);
521 }
522 return res;
523}
524
525/**
eb44820c
RL		 526 * get_device_flags - get device specific flags from the dynamic device list.
527 * @sdev: &scsi_device to get flags for
1da177e4
LT		 528 * @vendor: vendor name
529 * @model: model name
530 *
531 * Description:
598fa4b7
JB		 532 * Search the global scsi_dev_info_list (specified by list zero)
533 * for an entry matching @vendor and @model, if found, return the
534 * matching flags value, else return the host or global default
535 * settings. Called during scan time.
1da177e4 536 **/
7f23e146
JB		 537int scsi_get_device_flags(struct scsi_device *sdev,
538 const unsigned char *vendor,
539 const unsigned char *model)
598fa4b7
JB		 540{
541 return scsi_get_device_flags_keyed(sdev, vendor, model,
542 SCSI_DEVINFO_GLOBAL);
543}
544
545
546/**
1acf3b06 547 * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
598fa4b7
JB		 548 * @sdev: &scsi_device to get flags for
549 * @vendor: vendor name
550 * @model: model name
551 * @key: list to look up
552 *
553 * Description:
554 * Search the scsi_dev_info_list specified by @key for an entry
555 * matching @vendor and @model, if found, return the matching
556 * flags value, else return the host or global default settings.
557 * Called during scan time.
558 **/
559int scsi_get_device_flags_keyed(struct scsi_device *sdev,
560 const unsigned char *vendor,
561 const unsigned char *model,
562 int key)
1da177e4
LT		 563{
564 struct scsi_dev_info_list *devinfo;
598fa4b7
JB		 565 struct scsi_dev_info_list_table *devinfo_table;
566
567 devinfo_table = scsi_devinfo_lookup_by_key(key);
1da177e4 568
598fa4b7
JB		 569 if (IS_ERR(devinfo_table))
570 return PTR_ERR(devinfo_table);
1da177e4 571
598fa4b7
JB		 572 list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
573 dev_info_list) {
1da177e4
LT		 574 if (devinfo->compatible) {
575 /*
576 * Behave like the older version of get_device_flags.
577 */
578 size_t max;
579 /*
580 * XXX why skip leading spaces? If an odd INQUIRY
581 * value, that should have been part of the
582 * scsi_static_device_list[] entry, such as " FOO"
583 * rather than "FOO". Since this code is already
584 * here, and we don't know what device it is
585 * trying to work with, leave it as-is.
586 */
587 max = 8; /* max length of vendor */
588 while ((max > 0) && *vendor == ' ') {
589 max--;
590 vendor++;
591 }
592 /*
593 * XXX removing the following strlen() would be
594 * good, using it means that for a an entry not in
595 * the list, we scan every byte of every vendor
596 * listed in scsi_static_device_list[], and never match
597 * a single one (and still have to compare at
598 * least the first byte of each vendor).
599 */
600 if (memcmp(devinfo->vendor, vendor,
601 min(max, strlen(devinfo->vendor))))
602 continue;
603 /*
604 * Skip spaces again.
605 */
606 max = 16; /* max length of model */
607 while ((max > 0) && *model == ' ') {
608 max--;
609 model++;
610 }
611 if (memcmp(devinfo->model, model,
612 min(max, strlen(devinfo->model))))
613 continue;
614 return devinfo->flags;
615 } else {
616 if (!memcmp(devinfo->vendor, vendor,
617 sizeof(devinfo->vendor)) &&
618 !memcmp(devinfo->model, model,
619 sizeof(devinfo->model)))
620 return devinfo->flags;
621 }
622 }
598fa4b7
JB		 623 /* nothing found, return nothing */
624 if (key != SCSI_DEVINFO_GLOBAL)
625 return 0;
626
627 /* except for the global list, where we have an exception */
628 if (sdev->sdev_bflags)
629 return sdev->sdev_bflags;
630
631 return scsi_default_dev_flags;
1da177e4 632}
598fa4b7 633EXPORT_SYMBOL(scsi_get_device_flags_keyed);
1da177e4
LT		 634
635#ifdef CONFIG_SCSI_PROC_FS
598fa4b7
JB		 636struct double_list {
637 struct list_head *top;
638 struct list_head *bottom;
639};
640
352ced8e 641static int devinfo_seq_show(struct seq_file *m, void *v)
1da177e4 642{
598fa4b7
JB		 643 struct double_list *dl = v;
644 struct scsi_dev_info_list_table *devinfo_table =
645 list_entry(dl->top, struct scsi_dev_info_list_table, node);
352ced8e 646 struct scsi_dev_info_list *devinfo =
598fa4b7
JB		 647 list_entry(dl->bottom, struct scsi_dev_info_list,
648 dev_info_list);
649
650 if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
651 devinfo_table->name)
652 seq_printf(m, "[%s]:\n", devinfo_table->name);
1da177e4 653
352ced8e 654 seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
598fa4b7 655 devinfo->vendor, devinfo->model, devinfo->flags);
352ced8e
AD		 656 return 0;
657}
658
598fa4b7 659static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
352ced8e 660{
598fa4b7
JB		 661 struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
662 loff_t pos = *ppos;
663
664 if (!dl)
665 return NULL;
666
667 list_for_each(dl->top, &scsi_dev_info_list) {
668 struct scsi_dev_info_list_table *devinfo_table =
669 list_entry(dl->top, struct scsi_dev_info_list_table,
670 node);
671 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
672 if (pos-- == 0)
673 return dl;
674 }
675
676 kfree(dl);
677 return NULL;
352ced8e 678}
1da177e4 679
598fa4b7 680static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
352ced8e 681{
598fa4b7
JB		 682 struct double_list *dl = v;
683 struct scsi_dev_info_list_table *devinfo_table =
684 list_entry(dl->top, struct scsi_dev_info_list_table, node);
685
686 ++*ppos;
687 dl->bottom = dl->bottom->next;
688 while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
689 dl->top = dl->top->next;
690 if (dl->top == &scsi_dev_info_list) {
691 kfree(dl);
692 return NULL;
693 }
694 devinfo_table = list_entry(dl->top,
695 struct scsi_dev_info_list_table,
696 node);
697 dl->bottom = devinfo_table->scsi_dev_info_list.next;
698 }
699
700 return dl;
352ced8e
AD		 701}
702
703static void devinfo_seq_stop(struct seq_file *m, void *v)
704{
598fa4b7 705 kfree(v);
352ced8e
AD		 706}
707
708static const struct seq_operations scsi_devinfo_seq_ops = {
709 .start = devinfo_seq_start,
710 .next = devinfo_seq_next,
711 .stop = devinfo_seq_stop,
712 .show = devinfo_seq_show,
713};
714
715static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
716{
717 return seq_open(file, &scsi_devinfo_seq_ops);
1da177e4
LT		 718}
719
720/*
eb44820c 721 * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
1da177e4 722 *
eb44820c
RL		 723 * Description: Adds a black/white list entry for vendor and model with an
724 * integer value of flag to the scsi device info list.
725 * To use, echo "vendor:model:flag" > /proc/scsi/device_info
1da177e4 726 */
352ced8e
AD		 727static ssize_t proc_scsi_devinfo_write(struct file *file,
728 const char __user *buf,
729 size_t length, loff_t *ppos)
1da177e4
LT		 730{
731 char *buffer;
352ced8e 732 ssize_t err = length;
1da177e4
LT		 733
734 if (!buf || length>PAGE_SIZE)
735 return -EINVAL;
736 if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
737 return -ENOMEM;
738 if (copy_from_user(buffer, buf, length)) {
739 err =-EFAULT;
740 goto out;
741 }
742
743 if (length < PAGE_SIZE)
744 buffer[length] = '\0';
745 else if (buffer[PAGE_SIZE-1]) {
746 err = -EINVAL;
747 goto out;
748 }
749
750 scsi_dev_info_list_add_str(buffer);
751
752out:
753 free_page((unsigned long)buffer);
754 return err;
755}
352ced8e
AD		 756
757static const struct file_operations scsi_devinfo_proc_fops = {
758 .owner = THIS_MODULE,
759 .open = proc_scsi_devinfo_open,
760 .read = seq_read,
761 .write = proc_scsi_devinfo_write,
762 .llseek = seq_lseek,
763 .release = seq_release,
764};
1da177e4
LT		 765#endif /* CONFIG_SCSI_PROC_FS */
766
767module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
768MODULE_PARM_DESC(dev_flags,
769 "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
770 " list entries for vendor and model with an integer value of flags"
771 " to the scsi device info list");
772
773module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
774MODULE_PARM_DESC(default_dev_flags,
775 "scsi default device flag integer value");
776
777/**
1acf3b06 778 * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
1da177e4
LT		 779 **/
780void scsi_exit_devinfo(void)
781{
1da177e4
LT		 782#ifdef CONFIG_SCSI_PROC_FS
783 remove_proc_entry("scsi/device_info", NULL);
784#endif
785
598fa4b7
JB		 786 scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
787}
788
789/**
790 * scsi_dev_info_add_list - add a new devinfo list
791 * @key: key of the list to add
792 * @name: Name of the list to add (for /proc/scsi/device_info)
793 *
794 * Adds the requested list, returns zero on success, -EEXIST if the
795 * key is already registered to a list, or other error on failure.
796 */
797int scsi_dev_info_add_list(int key, const char *name)
798{
799 struct scsi_dev_info_list_table *devinfo_table =
800 scsi_devinfo_lookup_by_key(key);
801
802 if (!IS_ERR(devinfo_table))
803 /* list already exists */
804 return -EEXIST;
805
806 devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
807
808 if (!devinfo_table)
809 return -ENOMEM;
810
811 INIT_LIST_HEAD(&devinfo_table->node);
812 INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
813 devinfo_table->name = name;
814 devinfo_table->key = key;
815 list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
816
817 return 0;
818}
819EXPORT_SYMBOL(scsi_dev_info_add_list);
820
821/**
822 * scsi_dev_info_remove_list - destroy an added devinfo list
823 * @key: key of the list to destroy
824 *
825 * Iterates over the entire list first, freeing all the values, then
826 * frees the list itself. Returns 0 on success or -EINVAL if the key
827 * can't be found.
828 */
829int scsi_dev_info_remove_list(int key)
830{
831 struct list_head *lh, *lh_next;
832 struct scsi_dev_info_list_table *devinfo_table =
833 scsi_devinfo_lookup_by_key(key);
834
835 if (IS_ERR(devinfo_table))
836 /* no such list */
837 return -EINVAL;
838
839 /* remove from the master list */
840 list_del(&devinfo_table->node);
841
842 list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
843 struct scsi_dev_info_list *devinfo;
844
1da177e4
LT		 845 devinfo = list_entry(lh, struct scsi_dev_info_list,
846 dev_info_list);
847 kfree(devinfo);
848 }
598fa4b7
JB		 849 kfree(devinfo_table);
850
851 return 0;
1da177e4 852}
598fa4b7 853EXPORT_SYMBOL(scsi_dev_info_remove_list);
1da177e4
LT		 854
855/**
c93ff979 856 * scsi_init_devinfo - set up the dynamic device list.
1da177e4
LT		 857 *
858 * Description:
eb44820c 859 * Add command line entries from scsi_dev_flags, then add
1da177e4 860 * scsi_static_device_list entries to the scsi device info list.
eb44820c 861 */
1da177e4
LT		 862int __init scsi_init_devinfo(void)
863{
864#ifdef CONFIG_SCSI_PROC_FS
865 struct proc_dir_entry *p;
866#endif
867 int error, i;
868
598fa4b7 869 error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
1da177e4
LT		 870 if (error)
871 return error;
872
598fa4b7
JB		 873 error = scsi_dev_info_list_add_str(scsi_dev_flags);
874 if (error)
875 goto out;
876
1da177e4
LT		 877 for (i = 0; scsi_static_device_list[i].vendor; i++) {
878 error = scsi_dev_info_list_add(1 /* compatibile */,
879 scsi_static_device_list[i].vendor,
880 scsi_static_device_list[i].model,
881 NULL,
882 scsi_static_device_list[i].flags);
883 if (error)
884 goto out;
885 }
886
887#ifdef CONFIG_SCSI_PROC_FS
352ced8e 888 p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
1da177e4
LT		 889 if (!p) {
890 error = -ENOMEM;
891 goto out;
892 }
1da177e4
LT		 893#endif /* CONFIG_SCSI_PROC_FS */
894
895 out:
896 if (error)
897 scsi_exit_devinfo();
898 return error;
899}
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