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> 9 10 #include <scsi/scsi_device.h> 11 #include <scsi/scsi_devinfo.h> 12 13 #include "scsi_priv.h" 14 15 16 /* 17 * scsi_dev_info_list: structure to hold black/white listed devices. 18 */ 19 struct scsi_dev_info_list { 20 struct list_head dev_info_list; 21 char vendor[8]; 22 char model[16]; 23 unsigned flags; 24 unsigned compatible; /* for use with scsi_static_device_list entries */ 25 }; 26 27 28 static const char spaces[] = " "; /* 16 of them */ 29 static unsigned scsi_default_dev_flags; 30 static LIST_HEAD(scsi_dev_info_list); 31 static char scsi_dev_flags[256]; 32 33 /* 34 * scsi_static_device_list: deprecated list of devices that require 35 * settings that differ from the default, includes black-listed (broken) 36 * devices. The entries here are added to the tail of scsi_dev_info_list 37 * via scsi_dev_info_list_init. 38 * 39 * Do not add to this list, use the command line or proc interface to add 40 * to the scsi_dev_info_list. This table will eventually go away. 41 */ 42 static struct { 43 char *vendor; 44 char *model; 45 char *revision; /* revision known to be bad, unused */ 46 unsigned flags; 47 } scsi_static_device_list[] __initdata = { 48 /* 49 * The following devices are known not to tolerate a lun != 0 scan 50 * for one reason or another. Some will respond to all luns, 51 * others will lock up. 52 */ 53 {"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN}, /* locks up */ 54 {"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN}, /* locks up */ 55 {"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN}, /* locks up */ 56 {"DENON", "DRD-25X", "V", BLIST_NOLUN}, /* locks up */ 57 {"HITACHI", "DK312C", "CM81", BLIST_NOLUN}, /* responds to all lun */ 58 {"HITACHI", "DK314C", "CR21", BLIST_NOLUN}, /* responds to all lun */ 59 {"IMS", "CDD521/10", "2.06", BLIST_NOLUN}, /* locks up */ 60 {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN}, /* locks up */ 61 {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN}, /* locks up */ 62 {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN}, /* locks up */ 63 {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN}, /* locks up */ 64 {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN}, /* locks up */ 65 {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN}, /* responds to all lun */ 66 {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN}, /* responds to all lun */ 67 {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */ 68 {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN}, /* responds to all lun */ 69 {"RODIME", "RO3000S", "2.33", BLIST_NOLUN}, /* locks up */ 70 {"SUN", "SENA", NULL, BLIST_NOLUN}, /* responds to all luns */ 71 /* 72 * The following causes a failed REQUEST SENSE on lun 1 for 73 * aha152x controller, which causes SCSI code to reset bus. 74 */ 75 {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN}, 76 /* 77 * The following causes a failed REQUEST SENSE on lun 1 for 78 * aha152x controller, which causes SCSI code to reset bus. 79 */ 80 {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN}, 81 {"SEAGATE", "ST296", "921", BLIST_NOLUN}, /* responds to all lun */ 82 {"SEAGATE", "ST1581", "6538", BLIST_NOLUN}, /* responds to all lun */ 83 {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN}, 84 {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN}, 85 {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN}, 86 {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN}, 87 {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN}, 88 {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN}, /* locks up */ 89 {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN}, /* locks up */ 90 /* 91 * The following causes a failed REQUEST SENSE on lun 1 for 92 * seagate controller, which causes SCSI code to reset bus. 93 */ 94 {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN}, 95 {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN}, /* responds to all lun */ 96 /* 97 * The following causes a failed REQUEST SENSE on lun 1 for 98 * seagate controller, which causes SCSI code to reset bus. 99 */ 100 {"HP", "C1750A", "3226", BLIST_NOLUN}, /* scanjet iic */ 101 {"HP", "C1790A", "", BLIST_NOLUN}, /* scanjet iip */ 102 {"HP", "C2500A", "", BLIST_NOLUN}, /* scanjet iicx */ 103 {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */ 104 {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN}, /* responds to all lun */ 105 {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN}, /* locks up */ 106 {"NEC", "D3856", "0009", BLIST_NOLUN}, 107 {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN}, /* locks up */ 108 {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN}, /* locks up */ 109 {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN}, /* locks up */ 110 {"RELISYS", "Scorpio", NULL, BLIST_NOLUN}, /* responds to all lun */ 111 {"SANKYO", "CP525", "6.64", BLIST_NOLUN}, /* causes failed REQ SENSE, extra reset */ 112 {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN}, 113 {"transtec", "T5008", "0001", BLIST_NOREPORTLUN }, 114 {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN}, /* locks up */ 115 {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN}, /* locks up */ 116 {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN}, /* locks up */ 117 {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN}, /* locks up */ 118 {"", "Scanner", "1.80", BLIST_NOLUN}, /* responds to all lun */ 119 120 /* 121 * Other types of devices that have special flags. 122 * Note that all USB devices should have the BLIST_INQUIRY_36 flag. 123 */ 124 {"3PARdata", "VV", NULL, BLIST_REPORTLUN2}, 125 {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN}, 126 {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN}, 127 {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN}, 128 {"BELKIN", "USB 2 HS-CF", "1.95", BLIST_FORCELUN | BLIST_INQUIRY_36}, 129 {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN}, 130 {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36}, 131 {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN}, /* CMD RAID Controller */ 132 {"CNSI", "G7324", NULL, BLIST_SPARSELUN}, /* Chaparral G7324 RAID */ 133 {"CNSi", "G8324", NULL, BLIST_SPARSELUN}, /* Chaparral G8324 RAID */ 134 {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN}, 135 {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN}, 136 {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD}, 137 {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD}, 138 {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD}, 139 {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN}, 140 {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD}, 141 {"DELL", "PV660F", NULL, BLIST_SPARSELUN}, 142 {"DELL", "PV660F PSEUDO", NULL, BLIST_SPARSELUN}, 143 {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN}, /* Dell PV 530F */ 144 {"DELL", "PV530F", NULL, BLIST_SPARSELUN}, 145 {"DELL", "PERCRAID", NULL, BLIST_FORCELUN}, 146 {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */ 147 {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */ 148 {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN}, 149 {"EMULEX", "MD21/S2 ESDI", NULL, BLIST_SINGLELUN}, 150 {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, 151 {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36}, 152 {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36}, 153 {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36}, 154 {"HITACHI", "DF400", "*", BLIST_SPARSELUN}, 155 {"HITACHI", "DF500", "*", BLIST_SPARSELUN}, 156 {"HITACHI", "DF600", "*", BLIST_SPARSELUN}, 157 {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP VA7400 */ 158 {"HP", "OPEN-", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP XP Arrays */ 159 {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN}, 160 {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD}, 161 {"HP", "C1557A", NULL, BLIST_FORCELUN}, 162 {"HP", "C3323-300", "4269", BLIST_NOTQ}, 163 {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN}, 164 {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, 165 {"IBM", "2105", NULL, BLIST_RETRY_HWERROR}, 166 {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN}, 167 {"IOMEGA", "Io20S *F", NULL, BLIST_KEY}, 168 {"INSITE", "Floptical F*8I", NULL, BLIST_KEY}, 169 {"INSITE", "I325VM", NULL, BLIST_KEY}, 170 {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36}, 171 {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN}, 172 {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 173 {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36}, 174 {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36}, 175 {"Medion", "Flash XL MMC/SD", "2.6D", BLIST_FORCELUN}, 176 {"MegaRAID", "LD", NULL, BLIST_FORCELUN}, 177 {"MICROP", "4110", NULL, BLIST_NOTQ}, 178 {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2}, 179 {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN}, 180 {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 181 {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 182 {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 183 {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 184 {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 185 {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 186 {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 187 {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 188 {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 189 {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN}, 190 {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN}, 191 {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ}, /* Chokes on tagged INQUIRY */ 192 {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ}, 193 {"SGI", "RAID3", "*", BLIST_SPARSELUN}, 194 {"SGI", "RAID5", "*", BLIST_SPARSELUN}, 195 {"SGI", "TP9100", "*", BLIST_REPORTLUN2}, 196 {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH}, 197 {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH}, 198 {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36}, 199 {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN}, 200 {"SONY", "TSL", NULL, BLIST_FORCELUN}, /* DDS3 & DDS4 autoloaders */ 201 {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR}, 202 {"SUN", "T300", "*", BLIST_SPARSELUN}, 203 {"SUN", "T4", "*", BLIST_SPARSELUN}, 204 {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN}, 205 {"TOSHIBA", "CDROM", NULL, BLIST_ISROM}, 206 {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM}, 207 {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36}, 208 {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN}, 209 {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN}, 210 {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN}, 211 {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN}, 212 {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, 213 {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN}, 214 {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN}, 215 { NULL, NULL, NULL, 0 }, 216 }; 217 218 /* 219 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into 220 * devinfo vendor and model strings. 221 */ 222 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length, 223 char *from, int compatible) 224 { 225 size_t from_length; 226 227 from_length = strlen(from); 228 strncpy(to, from, min(to_length, from_length)); 229 if (from_length < to_length) { 230 if (compatible) { 231 /* 232 * NUL terminate the string if it is short. 233 */ 234 to[from_length] = '\0'; 235 } else { 236 /* 237 * space pad the string if it is short. 238 */ 239 strncpy(&to[from_length], spaces, 240 to_length - from_length); 241 } 242 } 243 if (from_length > to_length) 244 printk(KERN_WARNING "%s: %s string '%s' is too long\n", 245 __FUNCTION__, name, from); 246 } 247 248 /** 249 * scsi_dev_info_list_add: add one dev_info list entry. 250 * @vendor: vendor string 251 * @model: model (product) string 252 * @strflags: integer string 253 * @flag: if strflags NULL, use this flag value 254 * 255 * Description: 256 * Create and add one dev_info entry for @vendor, @model, @strflags or 257 * @flag. If @compatible, add to the tail of the list, do not space 258 * pad, and set devinfo->compatible. The scsi_static_device_list entries 259 * are added with @compatible 1 and @clfags NULL. 260 * 261 * Returns: 0 OK, -error on failure. 262 **/ 263 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model, 264 char *strflags, int flags) 265 { 266 struct scsi_dev_info_list *devinfo; 267 268 devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL); 269 if (!devinfo) { 270 printk(KERN_ERR "%s: no memory\n", __FUNCTION__); 271 return -ENOMEM; 272 } 273 274 scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor), 275 vendor, compatible); 276 scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model), 277 model, compatible); 278 279 if (strflags) 280 devinfo->flags = simple_strtoul(strflags, NULL, 0); 281 else 282 devinfo->flags = flags; 283 284 devinfo->compatible = compatible; 285 286 if (compatible) 287 list_add_tail(&devinfo->dev_info_list, &scsi_dev_info_list); 288 else 289 list_add(&devinfo->dev_info_list, &scsi_dev_info_list); 290 291 return 0; 292 } 293 294 /** 295 * scsi_dev_info_list_add_str: parse dev_list and add to the 296 * scsi_dev_info_list. 297 * @dev_list: string of device flags to add 298 * 299 * Description: 300 * Parse dev_list, and add entries to the scsi_dev_info_list. 301 * dev_list is of the form "vendor:product:flag,vendor:product:flag". 302 * dev_list is modified via strsep. Can be called for command line 303 * addition, for proc or mabye a sysfs interface. 304 * 305 * Returns: 0 if OK, -error on failure. 306 **/ 307 static int scsi_dev_info_list_add_str(char *dev_list) 308 { 309 char *vendor, *model, *strflags, *next; 310 char *next_check; 311 int res = 0; 312 313 next = dev_list; 314 if (next && next[0] == '"') { 315 /* 316 * Ignore both the leading and trailing quote. 317 */ 318 next++; 319 next_check = ",\""; 320 } else { 321 next_check = ","; 322 } 323 324 /* 325 * For the leading and trailing '"' case, the for loop comes 326 * through the last time with vendor[0] == '\0'. 327 */ 328 for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0') 329 && (res == 0); vendor = strsep(&next, ":")) { 330 strflags = NULL; 331 model = strsep(&next, ":"); 332 if (model) 333 strflags = strsep(&next, next_check); 334 if (!model || !strflags) { 335 printk(KERN_ERR "%s: bad dev info string '%s' '%s'" 336 " '%s'\n", __FUNCTION__, vendor, model, 337 strflags); 338 res = -EINVAL; 339 } else 340 res = scsi_dev_info_list_add(0 /* compatible */, vendor, 341 model, strflags, 0); 342 } 343 return res; 344 } 345 346 /** 347 * get_device_flags - get device specific flags from the dynamic device 348 * list. Called during scan time. 349 * @vendor: vendor name 350 * @model: model name 351 * 352 * Description: 353 * Search the scsi_dev_info_list for an entry matching @vendor and 354 * @model, if found, return the matching flags value, else return 355 * the host or global default settings. 356 **/ 357 int scsi_get_device_flags(struct scsi_device *sdev, 358 const unsigned char *vendor, 359 const unsigned char *model) 360 { 361 struct scsi_dev_info_list *devinfo; 362 unsigned int bflags; 363 364 bflags = sdev->sdev_bflags; 365 if (!bflags) 366 bflags = scsi_default_dev_flags; 367 368 list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) { 369 if (devinfo->compatible) { 370 /* 371 * Behave like the older version of get_device_flags. 372 */ 373 size_t max; 374 /* 375 * XXX why skip leading spaces? If an odd INQUIRY 376 * value, that should have been part of the 377 * scsi_static_device_list[] entry, such as " FOO" 378 * rather than "FOO". Since this code is already 379 * here, and we don't know what device it is 380 * trying to work with, leave it as-is. 381 */ 382 max = 8; /* max length of vendor */ 383 while ((max > 0) && *vendor == ' ') { 384 max--; 385 vendor++; 386 } 387 /* 388 * XXX removing the following strlen() would be 389 * good, using it means that for a an entry not in 390 * the list, we scan every byte of every vendor 391 * listed in scsi_static_device_list[], and never match 392 * a single one (and still have to compare at 393 * least the first byte of each vendor). 394 */ 395 if (memcmp(devinfo->vendor, vendor, 396 min(max, strlen(devinfo->vendor)))) 397 continue; 398 /* 399 * Skip spaces again. 400 */ 401 max = 16; /* max length of model */ 402 while ((max > 0) && *model == ' ') { 403 max--; 404 model++; 405 } 406 if (memcmp(devinfo->model, model, 407 min(max, strlen(devinfo->model)))) 408 continue; 409 return devinfo->flags; 410 } else { 411 if (!memcmp(devinfo->vendor, vendor, 412 sizeof(devinfo->vendor)) && 413 !memcmp(devinfo->model, model, 414 sizeof(devinfo->model))) 415 return devinfo->flags; 416 } 417 } 418 return bflags; 419 } 420 421 #ifdef CONFIG_SCSI_PROC_FS 422 /* 423 * proc_scsi_dev_info_read: dump the scsi_dev_info_list via 424 * /proc/scsi/device_info 425 */ 426 static int proc_scsi_devinfo_read(char *buffer, char **start, 427 off_t offset, int length) 428 { 429 struct scsi_dev_info_list *devinfo; 430 int size, len = 0; 431 off_t begin = 0; 432 off_t pos = 0; 433 434 list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) { 435 size = sprintf(buffer + len, "'%.8s' '%.16s' 0x%x\n", 436 devinfo->vendor, devinfo->model, devinfo->flags); 437 len += size; 438 pos = begin + len; 439 if (pos < offset) { 440 len = 0; 441 begin = pos; 442 } 443 if (pos > offset + length) 444 goto stop_output; 445 } 446 447 stop_output: 448 *start = buffer + (offset - begin); /* Start of wanted data */ 449 len -= (offset - begin); /* Start slop */ 450 if (len > length) 451 len = length; /* Ending slop */ 452 return (len); 453 } 454 455 /* 456 * proc_scsi_dev_info_write: allow additions to the scsi_dev_info_list via 457 * /proc. 458 * 459 * Use: echo "vendor:model:flag" > /proc/scsi/device_info 460 * 461 * To add a black/white list entry for vendor and model with an integer 462 * value of flag to the scsi device info list. 463 */ 464 static int proc_scsi_devinfo_write(struct file *file, const char __user *buf, 465 unsigned long length, void *data) 466 { 467 char *buffer; 468 int err = length; 469 470 if (!buf || length>PAGE_SIZE) 471 return -EINVAL; 472 if (!(buffer = (char *) __get_free_page(GFP_KERNEL))) 473 return -ENOMEM; 474 if (copy_from_user(buffer, buf, length)) { 475 err =-EFAULT; 476 goto out; 477 } 478 479 if (length < PAGE_SIZE) 480 buffer[length] = '\0'; 481 else if (buffer[PAGE_SIZE-1]) { 482 err = -EINVAL; 483 goto out; 484 } 485 486 scsi_dev_info_list_add_str(buffer); 487 488 out: 489 free_page((unsigned long)buffer); 490 return err; 491 } 492 #endif /* CONFIG_SCSI_PROC_FS */ 493 494 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0); 495 MODULE_PARM_DESC(dev_flags, 496 "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white" 497 " list entries for vendor and model with an integer value of flags" 498 " to the scsi device info list"); 499 500 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR); 501 MODULE_PARM_DESC(default_dev_flags, 502 "scsi default device flag integer value"); 503 504 /** 505 * scsi_dev_info_list_delete: called from scsi.c:exit_scsi to remove 506 * the scsi_dev_info_list. 507 **/ 508 void scsi_exit_devinfo(void) 509 { 510 struct list_head *lh, *lh_next; 511 struct scsi_dev_info_list *devinfo; 512 513 #ifdef CONFIG_SCSI_PROC_FS 514 remove_proc_entry("scsi/device_info", NULL); 515 #endif 516 517 list_for_each_safe(lh, lh_next, &scsi_dev_info_list) { 518 devinfo = list_entry(lh, struct scsi_dev_info_list, 519 dev_info_list); 520 kfree(devinfo); 521 } 522 } 523 524 /** 525 * scsi_dev_list_init: set up the dynamic device list. 526 * @dev_list: string of device flags to add 527 * 528 * Description: 529 * Add command line @dev_list entries, then add 530 * scsi_static_device_list entries to the scsi device info list. 531 **/ 532 int __init scsi_init_devinfo(void) 533 { 534 #ifdef CONFIG_SCSI_PROC_FS 535 struct proc_dir_entry *p; 536 #endif 537 int error, i; 538 539 error = scsi_dev_info_list_add_str(scsi_dev_flags); 540 if (error) 541 return error; 542 543 for (i = 0; scsi_static_device_list[i].vendor; i++) { 544 error = scsi_dev_info_list_add(1 /* compatibile */, 545 scsi_static_device_list[i].vendor, 546 scsi_static_device_list[i].model, 547 NULL, 548 scsi_static_device_list[i].flags); 549 if (error) 550 goto out; 551 } 552 553 #ifdef CONFIG_SCSI_PROC_FS 554 p = create_proc_entry("scsi/device_info", 0, NULL); 555 if (!p) { 556 error = -ENOMEM; 557 goto out; 558 } 559 560 p->owner = THIS_MODULE; 561 p->get_info = proc_scsi_devinfo_read; 562 p->write_proc = proc_scsi_devinfo_write; 563 #endif /* CONFIG_SCSI_PROC_FS */ 564 565 out: 566 if (error) 567 scsi_exit_devinfo(); 568 return error; 569 } 570