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 {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN}, 130 {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN}, 131 {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36}, 132 {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN}, /* CMD RAID Controller */ 133 {"CNSI", "G7324", NULL, BLIST_SPARSELUN}, /* Chaparral G7324 RAID */ 134 {"CNSi", "G8324", NULL, BLIST_SPARSELUN}, /* Chaparral G8324 RAID */ 135 {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN}, 136 {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN}, 137 {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD}, 138 {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD}, 139 {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD}, 140 {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN}, 141 {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD}, 142 {"DELL", "PV660F", NULL, BLIST_SPARSELUN}, 143 {"DELL", "PV660F PSEUDO", NULL, BLIST_SPARSELUN}, 144 {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN}, /* Dell PV 530F */ 145 {"DELL", "PV530F", NULL, BLIST_SPARSELUN}, 146 {"DELL", "PERCRAID", NULL, BLIST_FORCELUN}, 147 {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */ 148 {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */ 149 {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN}, 150 {"EMULEX", "MD21/S2 ESDI", NULL, BLIST_SINGLELUN}, 151 {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, 152 {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36}, 153 {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36}, 154 {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36}, 155 {"HITACHI", "DF400", "*", BLIST_SPARSELUN}, 156 {"HITACHI", "DF500", "*", BLIST_SPARSELUN}, 157 {"HITACHI", "DF600", "*", BLIST_SPARSELUN}, 158 {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP VA7400 */ 159 {"HP", "OPEN-", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP XP Arrays */ 160 {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN}, 161 {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD}, 162 {"HP", "C1557A", NULL, BLIST_FORCELUN}, 163 {"HP", "C3323-300", "4269", BLIST_NOTQ}, 164 {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN}, 165 {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, 166 {"IBM", "2105", NULL, BLIST_RETRY_HWERROR}, 167 {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN}, 168 {"IOMEGA", "Io20S *F", NULL, BLIST_KEY}, 169 {"INSITE", "Floptical F*8I", NULL, BLIST_KEY}, 170 {"INSITE", "I325VM", NULL, BLIST_KEY}, 171 {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36}, 172 {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN}, 173 {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 174 {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36}, 175 {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36}, 176 {"Medion", "Flash XL MMC/SD", "2.6D", BLIST_FORCELUN}, 177 {"MegaRAID", "LD", NULL, BLIST_FORCELUN}, 178 {"MICROP", "4110", NULL, BLIST_NOTQ}, 179 {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2}, 180 {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN}, 181 {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 182 {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 183 {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 184 {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 185 {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 186 {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 187 {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 188 {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 189 {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN}, 190 {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN}, 191 {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN}, 192 {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ}, /* Chokes on tagged INQUIRY */ 193 {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ}, 194 {"SGI", "RAID3", "*", BLIST_SPARSELUN}, 195 {"SGI", "RAID5", "*", BLIST_SPARSELUN}, 196 {"SGI", "TP9100", "*", BLIST_REPORTLUN2}, 197 {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH}, 198 {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH}, 199 {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36}, 200 {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN}, 201 {"SONY", "TSL", NULL, BLIST_FORCELUN}, /* DDS3 & DDS4 autoloaders */ 202 {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR}, 203 {"SUN", "T300", "*", BLIST_SPARSELUN}, 204 {"SUN", "T4", "*", BLIST_SPARSELUN}, 205 {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN}, 206 {"TOSHIBA", "CDROM", NULL, BLIST_ISROM}, 207 {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM}, 208 {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36}, 209 {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN}, 210 {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN}, 211 {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN}, 212 {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN}, 213 {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, 214 {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN}, 215 {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN}, 216 { NULL, NULL, NULL, 0 }, 217 }; 218 219 /* 220 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into 221 * devinfo vendor and model strings. 222 */ 223 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length, 224 char *from, int compatible) 225 { 226 size_t from_length; 227 228 from_length = strlen(from); 229 strncpy(to, from, min(to_length, from_length)); 230 if (from_length < to_length) { 231 if (compatible) { 232 /* 233 * NUL terminate the string if it is short. 234 */ 235 to[from_length] = '\0'; 236 } else { 237 /* 238 * space pad the string if it is short. 239 */ 240 strncpy(&to[from_length], spaces, 241 to_length - from_length); 242 } 243 } 244 if (from_length > to_length) 245 printk(KERN_WARNING "%s: %s string '%s' is too long\n", 246 __FUNCTION__, name, from); 247 } 248 249 /** 250 * scsi_dev_info_list_add: add one dev_info list entry. 251 * @vendor: vendor string 252 * @model: model (product) string 253 * @strflags: integer string 254 * @flag: if strflags NULL, use this flag value 255 * 256 * Description: 257 * Create and add one dev_info entry for @vendor, @model, @strflags or 258 * @flag. If @compatible, add to the tail of the list, do not space 259 * pad, and set devinfo->compatible. The scsi_static_device_list entries 260 * are added with @compatible 1 and @clfags NULL. 261 * 262 * Returns: 0 OK, -error on failure. 263 **/ 264 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model, 265 char *strflags, int flags) 266 { 267 struct scsi_dev_info_list *devinfo; 268 269 devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL); 270 if (!devinfo) { 271 printk(KERN_ERR "%s: no memory\n", __FUNCTION__); 272 return -ENOMEM; 273 } 274 275 scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor), 276 vendor, compatible); 277 scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model), 278 model, compatible); 279 280 if (strflags) 281 devinfo->flags = simple_strtoul(strflags, NULL, 0); 282 else 283 devinfo->flags = flags; 284 285 devinfo->compatible = compatible; 286 287 if (compatible) 288 list_add_tail(&devinfo->dev_info_list, &scsi_dev_info_list); 289 else 290 list_add(&devinfo->dev_info_list, &scsi_dev_info_list); 291 292 return 0; 293 } 294 295 /** 296 * scsi_dev_info_list_add_str: parse dev_list and add to the 297 * scsi_dev_info_list. 298 * @dev_list: string of device flags to add 299 * 300 * Description: 301 * Parse dev_list, and add entries to the scsi_dev_info_list. 302 * dev_list is of the form "vendor:product:flag,vendor:product:flag". 303 * dev_list is modified via strsep. Can be called for command line 304 * addition, for proc or mabye a sysfs interface. 305 * 306 * Returns: 0 if OK, -error on failure. 307 **/ 308 static int scsi_dev_info_list_add_str(char *dev_list) 309 { 310 char *vendor, *model, *strflags, *next; 311 char *next_check; 312 int res = 0; 313 314 next = dev_list; 315 if (next && next[0] == '"') { 316 /* 317 * Ignore both the leading and trailing quote. 318 */ 319 next++; 320 next_check = ",\""; 321 } else { 322 next_check = ","; 323 } 324 325 /* 326 * For the leading and trailing '"' case, the for loop comes 327 * through the last time with vendor[0] == '\0'. 328 */ 329 for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0') 330 && (res == 0); vendor = strsep(&next, ":")) { 331 strflags = NULL; 332 model = strsep(&next, ":"); 333 if (model) 334 strflags = strsep(&next, next_check); 335 if (!model || !strflags) { 336 printk(KERN_ERR "%s: bad dev info string '%s' '%s'" 337 " '%s'\n", __FUNCTION__, vendor, model, 338 strflags); 339 res = -EINVAL; 340 } else 341 res = scsi_dev_info_list_add(0 /* compatible */, vendor, 342 model, strflags, 0); 343 } 344 return res; 345 } 346 347 /** 348 * get_device_flags - get device specific flags from the dynamic device 349 * list. Called during scan time. 350 * @vendor: vendor name 351 * @model: model name 352 * 353 * Description: 354 * Search the scsi_dev_info_list for an entry matching @vendor and 355 * @model, if found, return the matching flags value, else return 356 * the host or global default settings. 357 **/ 358 int scsi_get_device_flags(struct scsi_device *sdev, 359 const unsigned char *vendor, 360 const unsigned char *model) 361 { 362 struct scsi_dev_info_list *devinfo; 363 unsigned int bflags; 364 365 bflags = sdev->sdev_bflags; 366 if (!bflags) 367 bflags = scsi_default_dev_flags; 368 369 list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) { 370 if (devinfo->compatible) { 371 /* 372 * Behave like the older version of get_device_flags. 373 */ 374 size_t max; 375 /* 376 * XXX why skip leading spaces? If an odd INQUIRY 377 * value, that should have been part of the 378 * scsi_static_device_list[] entry, such as " FOO" 379 * rather than "FOO". Since this code is already 380 * here, and we don't know what device it is 381 * trying to work with, leave it as-is. 382 */ 383 max = 8; /* max length of vendor */ 384 while ((max > 0) && *vendor == ' ') { 385 max--; 386 vendor++; 387 } 388 /* 389 * XXX removing the following strlen() would be 390 * good, using it means that for a an entry not in 391 * the list, we scan every byte of every vendor 392 * listed in scsi_static_device_list[], and never match 393 * a single one (and still have to compare at 394 * least the first byte of each vendor). 395 */ 396 if (memcmp(devinfo->vendor, vendor, 397 min(max, strlen(devinfo->vendor)))) 398 continue; 399 /* 400 * Skip spaces again. 401 */ 402 max = 16; /* max length of model */ 403 while ((max > 0) && *model == ' ') { 404 max--; 405 model++; 406 } 407 if (memcmp(devinfo->model, model, 408 min(max, strlen(devinfo->model)))) 409 continue; 410 return devinfo->flags; 411 } else { 412 if (!memcmp(devinfo->vendor, vendor, 413 sizeof(devinfo->vendor)) && 414 !memcmp(devinfo->model, model, 415 sizeof(devinfo->model))) 416 return devinfo->flags; 417 } 418 } 419 return bflags; 420 } 421 422 #ifdef CONFIG_SCSI_PROC_FS 423 /* 424 * proc_scsi_dev_info_read: dump the scsi_dev_info_list via 425 * /proc/scsi/device_info 426 */ 427 static int proc_scsi_devinfo_read(char *buffer, char **start, 428 off_t offset, int length) 429 { 430 struct scsi_dev_info_list *devinfo; 431 int size, len = 0; 432 off_t begin = 0; 433 off_t pos = 0; 434 435 list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) { 436 size = sprintf(buffer + len, "'%.8s' '%.16s' 0x%x\n", 437 devinfo->vendor, devinfo->model, devinfo->flags); 438 len += size; 439 pos = begin + len; 440 if (pos < offset) { 441 len = 0; 442 begin = pos; 443 } 444 if (pos > offset + length) 445 goto stop_output; 446 } 447 448 stop_output: 449 *start = buffer + (offset - begin); /* Start of wanted data */ 450 len -= (offset - begin); /* Start slop */ 451 if (len > length) 452 len = length; /* Ending slop */ 453 return (len); 454 } 455 456 /* 457 * proc_scsi_dev_info_write: allow additions to the scsi_dev_info_list via 458 * /proc. 459 * 460 * Use: echo "vendor:model:flag" > /proc/scsi/device_info 461 * 462 * To add a black/white list entry for vendor and model with an integer 463 * value of flag to the scsi device info list. 464 */ 465 static int proc_scsi_devinfo_write(struct file *file, const char __user *buf, 466 unsigned long length, void *data) 467 { 468 char *buffer; 469 int err = length; 470 471 if (!buf || length>PAGE_SIZE) 472 return -EINVAL; 473 if (!(buffer = (char *) __get_free_page(GFP_KERNEL))) 474 return -ENOMEM; 475 if (copy_from_user(buffer, buf, length)) { 476 err =-EFAULT; 477 goto out; 478 } 479 480 if (length < PAGE_SIZE) 481 buffer[length] = '\0'; 482 else if (buffer[PAGE_SIZE-1]) { 483 err = -EINVAL; 484 goto out; 485 } 486 487 scsi_dev_info_list_add_str(buffer); 488 489 out: 490 free_page((unsigned long)buffer); 491 return err; 492 } 493 #endif /* CONFIG_SCSI_PROC_FS */ 494 495 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0); 496 MODULE_PARM_DESC(dev_flags, 497 "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white" 498 " list entries for vendor and model with an integer value of flags" 499 " to the scsi device info list"); 500 501 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR); 502 MODULE_PARM_DESC(default_dev_flags, 503 "scsi default device flag integer value"); 504 505 /** 506 * scsi_dev_info_list_delete: called from scsi.c:exit_scsi to remove 507 * the scsi_dev_info_list. 508 **/ 509 void scsi_exit_devinfo(void) 510 { 511 struct list_head *lh, *lh_next; 512 struct scsi_dev_info_list *devinfo; 513 514 #ifdef CONFIG_SCSI_PROC_FS 515 remove_proc_entry("scsi/device_info", NULL); 516 #endif 517 518 list_for_each_safe(lh, lh_next, &scsi_dev_info_list) { 519 devinfo = list_entry(lh, struct scsi_dev_info_list, 520 dev_info_list); 521 kfree(devinfo); 522 } 523 } 524 525 /** 526 * scsi_dev_list_init: set up the dynamic device list. 527 * @dev_list: string of device flags to add 528 * 529 * Description: 530 * Add command line @dev_list entries, then add 531 * scsi_static_device_list entries to the scsi device info list. 532 **/ 533 int __init scsi_init_devinfo(void) 534 { 535 #ifdef CONFIG_SCSI_PROC_FS 536 struct proc_dir_entry *p; 537 #endif 538 int error, i; 539 540 error = scsi_dev_info_list_add_str(scsi_dev_flags); 541 if (error) 542 return error; 543 544 for (i = 0; scsi_static_device_list[i].vendor; i++) { 545 error = scsi_dev_info_list_add(1 /* compatibile */, 546 scsi_static_device_list[i].vendor, 547 scsi_static_device_list[i].model, 548 NULL, 549 scsi_static_device_list[i].flags); 550 if (error) 551 goto out; 552 } 553 554 #ifdef CONFIG_SCSI_PROC_FS 555 p = create_proc_entry("scsi/device_info", 0, NULL); 556 if (!p) { 557 error = -ENOMEM; 558 goto out; 559 } 560 561 p->owner = THIS_MODULE; 562 p->get_info = proc_scsi_devinfo_read; 563 p->write_proc = proc_scsi_devinfo_write; 564 #endif /* CONFIG_SCSI_PROC_FS */ 565 566 out: 567 if (error) 568 scsi_exit_devinfo(); 569 return error; 570 } 571