drivers/scsi/scsi_devinfo.c

   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 #include <scsi/scsi_devinfo.h>
  10
  11 #include "scsi.h"
  12 #include <scsi/scsi_host.h>
  13 #include "scsi_priv.h"
  14
  15 /*
  16  * scsi_dev_info_list: structure to hold black/white listed devices.
  17  */
  18 struct scsi_dev_info_list {
  19         struct list_head dev_info_list;
  20         char vendor[8];
  21         char model[16];
  22         unsigned flags;
  23         unsigned compatible; /* for use with scsi_static_device_list entries */
  24 };
  25
  26
  27 static const char spaces[] = "                "; /* 16 of them */
  28 static unsigned scsi_default_dev_flags;
  29 static LIST_HEAD(scsi_dev_info_list);
  30 static __init char scsi_dev_flags[256];
  31
  32 /*
  33  * scsi_static_device_list: deprecated list of devices that require
  34  * settings that differ from the default, includes black-listed (broken)
  35  * devices. The entries here are added to the tail of scsi_dev_info_list
  36  * via scsi_dev_info_list_init.
  37  *
  38  * Do not add to this list, use the command line or proc interface to add
  39  * to the scsi_dev_info_list. This table will eventually go away.
  40  */
  41 static struct {
  42         char *vendor;
  43         char *model;
  44         char *revision; /* revision known to be bad, unused */
  45         unsigned flags;
  46 } scsi_static_device_list[] __initdata = {
  47         /*
  48          * The following devices are known not to tolerate a lun != 0 scan
  49          * for one reason or another. Some will respond to all luns,
  50          * others will lock up.
  51          */
  52         {"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN},     /* locks up */
  53         {"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN},       /* locks up */
  54         {"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN},       /* locks up */
  55         {"DENON", "DRD-25X", "V", BLIST_NOLUN},                 /* locks up */
  56         {"HITACHI", "DK312C", "CM81", BLIST_NOLUN},     /* responds to all lun */
  57         {"HITACHI", "DK314C", "CR21", BLIST_NOLUN},     /* responds to all lun */
  58         {"IMS", "CDD521/10", "2.06", BLIST_NOLUN},      /* locks up */
  59         {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN},     /* locks up */
  60         {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN},     /* locks up */
  61         {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN},   /* locks up */
  62         {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN},     /* locks up */
  63         {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN},     /* locks up */
  64         {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN},    /* responds to all lun */
  65         {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
  66         {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN},    /* responds to all lun */
  67         {"RODIME", "RO3000S", "2.33", BLIST_NOLUN},     /* locks up */
  68         {"SUN", "SENA", NULL, BLIST_NOLUN},             /* responds to all luns */
  69         /*
  70          * The following causes a failed REQUEST SENSE on lun 1 for
  71          * aha152x controller, which causes SCSI code to reset bus.
  72          */
  73         {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
  74         /*
  75          * The following causes a failed REQUEST SENSE on lun 1 for
  76          * aha152x controller, which causes SCSI code to reset bus.
  77          */
  78         {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
  79         {"SEAGATE", "ST296", "921", BLIST_NOLUN},       /* responds to all lun */
  80         {"SEAGATE", "ST1581", "6538", BLIST_NOLUN},     /* responds to all lun */
  81         {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
  82         {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
  83         {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
  84         {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
  85         {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN},   /* locks up */
  86         {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN},       /* locks up */
  87         /*
  88          * The following causes a failed REQUEST SENSE on lun 1 for
  89          * seagate controller, which causes SCSI code to reset bus.
  90          */
  91         {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
  92         {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN},        /* responds to all lun */
  93         /*
  94          * The following causes a failed REQUEST SENSE on lun 1 for
  95          * seagate controller, which causes SCSI code to reset bus.
  96          */
  97         {"HP", "C1750A", "3226", BLIST_NOLUN},          /* scanjet iic */
  98         {"HP", "C1790A", "", BLIST_NOLUN},              /* scanjet iip */
  99         {"HP", "C2500A", "", BLIST_NOLUN},              /* scanjet iicx */
 100         {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
 101         {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN},      /* responds to all lun */
 102         {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN},     /* locks up */
 103         {"NEC", "D3856", "0009", BLIST_NOLUN},
 104         {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN},    /* locks up */
 105         {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN},    /* locks up */
 106         {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN},    /* locks up */
 107         {"RELISYS", "Scorpio", NULL, BLIST_NOLUN},      /* responds to all lun */
 108         {"SANKYO", "CP525", "6.64", BLIST_NOLUN},       /* causes failed REQ SENSE, extra reset */
 109         {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
 110         {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN},      /* locks up */
 111         {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN},      /* locks up */
 112         {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN},     /* locks up */
 113         {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN},    /* locks up */
 114
 115         /*
 116          * Other types of devices that have special flags.
 117          */
 118         {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
 119         {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
 120         {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
 121         {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_SPARSELUN},
 122         {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
 123         {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN},
 124         {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
 125         {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
 126         {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
 127         {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN},
 128         {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
 129         {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 130         {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 131         {"COMPAQ", "HSV110", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 132         {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
 133         {"DEC", "HSG80", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 134         {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
 135         {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
 136         {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
 137         {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
 138         {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
 139         {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
 140         {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
 141         {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
 142         {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
 143         {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 144         {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN},
 145         {"Generic", "USB Storage-SMC", "0090", BLIST_FORCELUN},
 146         {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN},
 147         {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN},
 148         {"HITACHI", "DF400", "*", BLIST_SPARSELUN},
 149         {"HITACHI", "DF500", "*", BLIST_SPARSELUN},
 150         {"HITACHI", "DF600", "*", BLIST_SPARSELUN},
 151         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 152         {"HP", "OPEN-", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP XP Arrays */
 153         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 154         {"HP", "HSV100", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 155         {"HP", "C1557A", NULL, BLIST_FORCELUN},
 156         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 157         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 158         {"ICSI", "SD Card", "2.7C", BLIST_FORCELUN},
 159         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 160         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 161         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 162         {"INSITE", "I325VM", NULL, BLIST_KEY},
 163         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 164         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 165         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 166         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 167         {"MICROP", "4110", NULL, BLIST_NOTQ},
 168         {"MYLEX", "DACARMRB", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 169         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 170         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 171         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 172         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 173         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 174         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 175         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 176         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 177         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 178         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 179         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 180         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 181         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 182         {"SGI", "TP9100", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 183         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN},
 184         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 185         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 186         {"SUN", "T300", "*", BLIST_SPARSELUN},
 187         {"SUN", "T4", "*", BLIST_SPARSELUN},
 188         {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
 189         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 190         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 191         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN},
 192         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 193         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 194         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 195         { NULL, NULL, NULL, 0 },
 196 };
 197
 198 /*
 199  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 200  * devinfo vendor and model strings.
 201  */
 202 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 203                                 char *from, int compatible)
 204 {
 205         size_t from_length;
 206
 207         from_length = strlen(from);
 208         strncpy(to, from, min(to_length, from_length));
 209         if (from_length < to_length) {
 210                 if (compatible) {
 211                         /*
 212                          * NUL terminate the string if it is short.
 213                          */
 214                         to[from_length] = '\0';
 215                 } else {
 216                         /*
 217                          * space pad the string if it is short.
 218                          */
 219                         strncpy(&to[from_length], spaces,
 220                                 to_length - from_length);
 221                 }
 222         }
 223         if (from_length > to_length)
 224                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 225                         __FUNCTION__, name, from);
 226 }
 227
 228 /**
 229  * scsi_dev_info_list_add: add one dev_info list entry.
 230  * @vendor:     vendor string
 231  * @model:      model (product) string
 232  * @strflags:   integer string
 233  * @flag:       if strflags NULL, use this flag value
 234  *
 235  * Description:
 236  *      Create and add one dev_info entry for @vendor, @model, @strflags or
 237  *      @flag. If @compatible, add to the tail of the list, do not space
 238  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 239  *      are added with @compatible 1 and @clfags NULL.
 240  *
 241  * Returns: 0 OK, -error on failure.
 242  **/
 243 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 244                             char *strflags, int flags)
 245 {
 246         struct scsi_dev_info_list *devinfo;
 247
 248         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 249         if (!devinfo) {
 250                 printk(KERN_ERR "%s: no memory\n", __FUNCTION__);
 251                 return -ENOMEM;
 252         }
 253
 254         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 255                             vendor, compatible);
 256         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 257                             model, compatible);
 258
 259         if (strflags)
 260                 devinfo->flags = simple_strtoul(strflags, NULL, 0);
 261         else
 262                 devinfo->flags = flags;
 263
 264         devinfo->compatible = compatible;
 265
 266         if (compatible)
 267                 list_add_tail(&devinfo->dev_info_list, &scsi_dev_info_list);
 268         else
 269                 list_add(&devinfo->dev_info_list, &scsi_dev_info_list);
 270
 271         return 0;
 272 }
 273
 274 /**
 275  * scsi_dev_info_list_add_str: parse dev_list and add to the
 276  * scsi_dev_info_list.
 277  * @dev_list:   string of device flags to add
 278  *
 279  * Description:
 280  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 281  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 282  *      dev_list is modified via strsep. Can be called for command line
 283  *      addition, for proc or mabye a sysfs interface.
 284  *
 285  * Returns: 0 if OK, -error on failure.
 286  **/
 287 static int scsi_dev_info_list_add_str(char *dev_list)
 288 {
 289         char *vendor, *model, *strflags, *next;
 290         char *next_check;
 291         int res = 0;
 292
 293         next = dev_list;
 294         if (next && next[0] == '"') {
 295                 /*
 296                  * Ignore both the leading and trailing quote.
 297                  */
 298                 next++;
 299                 next_check = ",\"";
 300         } else {
 301                 next_check = ",";
 302         }
 303
 304         /*
 305          * For the leading and trailing '"' case, the for loop comes
 306          * through the last time with vendor[0] == '\0'.
 307          */
 308         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 309              && (res == 0); vendor = strsep(&next, ":")) {
 310                 strflags = NULL;
 311                 model = strsep(&next, ":");
 312                 if (model)
 313                         strflags = strsep(&next, next_check);
 314                 if (!model || !strflags) {
 315                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 316                                " '%s'\n", __FUNCTION__, vendor, model,
 317                                strflags);
 318                         res = -EINVAL;
 319                 } else
 320                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 321                                                      model, strflags, 0);
 322         }
 323         return res;
 324 }
 325
 326 /**
 327  * get_device_flags - get device specific flags from the dynamic device
 328  * list. Called during scan time.
 329  * @vendor:     vendor name
 330  * @model:      model name
 331  *
 332  * Description:
 333  *     Search the scsi_dev_info_list for an entry matching @vendor and
 334  *     @model, if found, return the matching flags value, else return
 335  *     the host or global default settings.
 336  **/
 337 int scsi_get_device_flags(struct scsi_device *sdev, unsigned char *vendor,
 338                           unsigned char *model)
 339 {
 340         struct scsi_dev_info_list *devinfo;
 341         unsigned int bflags;
 342
 343         bflags = sdev->sdev_bflags;
 344         if (!bflags)
 345                 bflags = scsi_default_dev_flags;
 346
 347         list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
 348                 if (devinfo->compatible) {
 349                         /*
 350                          * Behave like the older version of get_device_flags.
 351                          */
 352                         size_t max;
 353                         /*
 354                          * XXX why skip leading spaces? If an odd INQUIRY
 355                          * value, that should have been part of the
 356                          * scsi_static_device_list[] entry, such as "  FOO"
 357                          * rather than "FOO". Since this code is already
 358                          * here, and we don't know what device it is
 359                          * trying to work with, leave it as-is.
 360                          */
 361                         max = 8;        /* max length of vendor */
 362                         while ((max > 0) && *vendor == ' ') {
 363                                 max--;
 364                                 vendor++;
 365                         }
 366                         /*
 367                          * XXX removing the following strlen() would be
 368                          * good, using it means that for a an entry not in
 369                          * the list, we scan every byte of every vendor
 370                          * listed in scsi_static_device_list[], and never match
 371                          * a single one (and still have to compare at
 372                          * least the first byte of each vendor).
 373                          */
 374                         if (memcmp(devinfo->vendor, vendor,
 375                                     min(max, strlen(devinfo->vendor))))
 376                                 continue;
 377                         /*
 378                          * Skip spaces again.
 379                          */
 380                         max = 16;       /* max length of model */
 381                         while ((max > 0) && *model == ' ') {
 382                                 max--;
 383                                 model++;
 384                         }
 385                         if (memcmp(devinfo->model, model,
 386                                    min(max, strlen(devinfo->model))))
 387                                 continue;
 388                         return devinfo->flags;
 389                 } else {
 390                         if (!memcmp(devinfo->vendor, vendor,
 391                                      sizeof(devinfo->vendor)) &&
 392                              !memcmp(devinfo->model, model,
 393                                       sizeof(devinfo->model)))
 394                                 return devinfo->flags;
 395                 }
 396         }
 397         return bflags;
 398 }
 399
 400 #ifdef CONFIG_SCSI_PROC_FS
 401 /*
 402  * proc_scsi_dev_info_read: dump the scsi_dev_info_list via
 403  * /proc/scsi/device_info
 404  */
 405 static int proc_scsi_devinfo_read(char *buffer, char **start,
 406                                   off_t offset, int length)
 407 {
 408         struct scsi_dev_info_list *devinfo;
 409         int size, len = 0;
 410         off_t begin = 0;
 411         off_t pos = 0;
 412
 413         list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
 414                 size = sprintf(buffer + len, "'%.8s' '%.16s' 0x%x\n",
 415                         devinfo->vendor, devinfo->model, devinfo->flags);
 416                 len += size;
 417                 pos = begin + len;
 418                 if (pos < offset) {
 419                         len = 0;
 420                         begin = pos;
 421                 }
 422                 if (pos > offset + length)
 423                         goto stop_output;
 424         }
 425
 426 stop_output:
 427         *start = buffer + (offset - begin);     /* Start of wanted data */
 428         len -= (offset - begin);        /* Start slop */
 429         if (len > length)
 430                 len = length;   /* Ending slop */
 431         return (len);
 432 }
 433
 434 /*
 435  * proc_scsi_dev_info_write: allow additions to the scsi_dev_info_list via
 436  * /proc.
 437  *
 438  * Use: echo "vendor:model:flag" > /proc/scsi/device_info
 439  *
 440  * To add a black/white list entry for vendor and model with an integer
 441  * value of flag to the scsi device info list.
 442  */
 443 static int proc_scsi_devinfo_write(struct file *file, const char __user *buf,
 444                                    unsigned long length, void *data)
 445 {
 446         char *buffer;
 447         int err = length;
 448
 449         if (!buf || length>PAGE_SIZE)
 450                 return -EINVAL;
 451         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 452                 return -ENOMEM;
 453         if (copy_from_user(buffer, buf, length)) {
 454                 err =-EFAULT;
 455                 goto out;
 456         }
 457
 458         if (length < PAGE_SIZE)
 459                 buffer[length] = '\0';
 460         else if (buffer[PAGE_SIZE-1]) {
 461                 err = -EINVAL;
 462                 goto out;
 463         }
 464
 465         scsi_dev_info_list_add_str(buffer);
 466
 467 out:
 468         free_page((unsigned long)buffer);
 469         return err;
 470 }
 471 #endif /* CONFIG_SCSI_PROC_FS */
 472
 473 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 474 MODULE_PARM_DESC(dev_flags,
 475          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 476          " list entries for vendor and model with an integer value of flags"
 477          " to the scsi device info list");
 478
 479 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 480 MODULE_PARM_DESC(default_dev_flags,
 481                  "scsi default device flag integer value");
 482
 483 /**
 484  * scsi_dev_info_list_delete: called from scsi.c:exit_scsi to remove
 485  *      the scsi_dev_info_list.
 486  **/
 487 void scsi_exit_devinfo(void)
 488 {
 489         struct list_head *lh, *lh_next;
 490         struct scsi_dev_info_list *devinfo;
 491
 492 #ifdef CONFIG_SCSI_PROC_FS
 493         remove_proc_entry("scsi/device_info", 0);
 494 #endif
 495
 496         list_for_each_safe(lh, lh_next, &scsi_dev_info_list) {
 497                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 498                                      dev_info_list);
 499                 kfree(devinfo);
 500         }
 501 }
 502
 503 /**
 504  * scsi_dev_list_init: set up the dynamic device list.
 505  * @dev_list:   string of device flags to add
 506  *
 507  * Description:
 508  *      Add command line @dev_list entries, then add
 509  *      scsi_static_device_list entries to the scsi device info list.
 510  **/
 511 int scsi_init_devinfo(void)
 512 {
 513 #ifdef CONFIG_SCSI_PROC_FS
 514         struct proc_dir_entry *p;
 515 #endif
 516         int error, i;
 517
 518         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 519         if (error)
 520                 return error;
 521
 522         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 523                 error = scsi_dev_info_list_add(1 /* compatibile */,
 524                                 scsi_static_device_list[i].vendor,
 525                                 scsi_static_device_list[i].model,
 526                                 NULL,
 527                                 scsi_static_device_list[i].flags);
 528                 if (error)
 529                         goto out;
 530         }
 531
 532 #ifdef CONFIG_SCSI_PROC_FS
 533         p = create_proc_entry("scsi/device_info", 0, NULL);
 534         if (!p) {
 535                 error = -ENOMEM;
 536                 goto out;
 537         }
 538
 539         p->owner = THIS_MODULE;
 540         p->get_info = proc_scsi_devinfo_read;
 541         p->write_proc = proc_scsi_devinfo_write;
 542 #endif /* CONFIG_SCSI_PROC_FS */
 543
 544  out:
 545         if (error)
 546                 scsi_exit_devinfo();
 547         return error;
 548 }