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 "hosts.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         {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_SPARSELUN},
 121         {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
 122         {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
 123         {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
 124         {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
 125         {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN},
 126         {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
 127         {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 128         {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 129         {"COMPAQ", "HSV110", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 130         {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
 131         {"DEC", "HSG80", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 132         {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
 133         {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
 134         {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
 135         {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
 136         {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
 137         {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
 138         {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
 139         {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
 140         {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
 141         {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 142         {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN},
 143         {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN},
 144         {"HITACHI", "DF400", "*", BLIST_SPARSELUN},
 145         {"HITACHI", "DF500", "*", BLIST_SPARSELUN},
 146         {"HITACHI", "DF600", "*", BLIST_SPARSELUN},
 147         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 148         {"HP", "OPEN-", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP XP Arrays */
 149         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 150         {"HP", "HSV100", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 151         {"HP", "C1557A", NULL, BLIST_FORCELUN},
 152         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 153         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 154         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 155         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 156         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 157         {"INSITE", "I325VM", NULL, BLIST_KEY},
 158         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 159         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 160         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 161         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 162         {"MICROP", "4110", NULL, BLIST_NOTQ},
 163         {"MYLEX", "DACARMRB", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 164         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 165         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 166         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 167         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 168         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 169         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 170         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 171         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 172         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 173         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 174         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 175         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 176         {"SGI", "TP9100", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 177         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN},
 178         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 179         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 180         {"SUN", "T300", "*", BLIST_SPARSELUN},
 181         {"SUN", "T4", "*", BLIST_SPARSELUN},
 182         {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
 183         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 184         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 185         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 186         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 187         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 188         { NULL, NULL, NULL, 0 },
 189 };
 190
 191 /*
 192  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 193  * devinfo vendor and model strings.
 194  */
 195 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 196                                 char *from, int compatible)
 197 {
 198         size_t from_length;
 199
 200         from_length = strlen(from);
 201         strncpy(to, from, min(to_length, from_length));
 202         if (from_length < to_length) {
 203                 if (compatible) {
 204                         /*
 205                          * NUL terminate the string if it is short.
 206                          */
 207                         to[from_length] = '\0';
 208                 } else {
 209                         /*
 210                          * space pad the string if it is short.
 211                          */
 212                         strncpy(&to[from_length], spaces,
 213                                 to_length - from_length);
 214                 }
 215         }
 216         if (from_length > to_length)
 217                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 218                         __FUNCTION__, name, from);
 219 }
 220
 221 /**
 222  * scsi_dev_info_list_add: add one dev_info list entry.
 223  * @vendor:     vendor string
 224  * @model:      model (product) string
 225  * @strflags:   integer string
 226  * @flag:       if strflags NULL, use this flag value
 227  *
 228  * Description:
 229  *      Create and add one dev_info entry for @vendor, @model, @strflags or
 230  *      @flag. If @compatible, add to the tail of the list, do not space
 231  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 232  *      are added with @compatible 1 and @clfags NULL.
 233  *
 234  * Returns: 0 OK, -error on failure.
 235  **/
 236 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 237                             char *strflags, int flags)
 238 {
 239         struct scsi_dev_info_list *devinfo;
 240
 241         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 242         if (!devinfo) {
 243                 printk(KERN_ERR "%s: no memory\n", __FUNCTION__);
 244                 return -ENOMEM;
 245         }
 246
 247         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 248                             vendor, compatible);
 249         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 250                             model, compatible);
 251
 252         if (strflags)
 253                 devinfo->flags = simple_strtoul(strflags, NULL, 0);
 254         else
 255                 devinfo->flags = flags;
 256
 257         devinfo->compatible = compatible;
 258
 259         if (compatible)
 260                 list_add_tail(&devinfo->dev_info_list, &scsi_dev_info_list);
 261         else
 262                 list_add(&devinfo->dev_info_list, &scsi_dev_info_list);
 263
 264         return 0;
 265 }
 266
 267 /**
 268  * scsi_dev_info_list_add_str: parse dev_list and add to the
 269  * scsi_dev_info_list.
 270  * @dev_list:   string of device flags to add
 271  *
 272  * Description:
 273  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 274  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 275  *      dev_list is modified via strsep. Can be called for command line
 276  *      addition, for proc or mabye a sysfs interface.
 277  *
 278  * Returns: 0 if OK, -error on failure.
 279  **/
 280 static int scsi_dev_info_list_add_str(char *dev_list)
 281 {
 282         char *vendor, *model, *strflags, *next;
 283         char *next_check;
 284         int res = 0;
 285
 286         next = dev_list;
 287         if (next && next[0] == '"') {
 288                 /*
 289                  * Ignore both the leading and trailing quote.
 290                  */
 291                 next++;
 292                 next_check = ",\"";
 293         } else {
 294                 next_check = ",";
 295         }
 296
 297         /*
 298          * For the leading and trailing '"' case, the for loop comes
 299          * through the last time with vendor[0] == '\0'.
 300          */
 301         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 302              && (res == 0); vendor = strsep(&next, ":")) {
 303                 strflags = NULL;
 304                 model = strsep(&next, ":");
 305                 if (model)
 306                         strflags = strsep(&next, next_check);
 307                 if (!model || !strflags) {
 308                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 309                                " '%s'\n", __FUNCTION__, vendor, model,
 310                                strflags);
 311                         res = -EINVAL;
 312                 } else
 313                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 314                                                      model, strflags, 0);
 315         }
 316         return res;
 317 }
 318
 319 /**
 320  * get_device_flags - get device specific flags from the dynamic device
 321  * list. Called during scan time.
 322  * @vendor:     vendor name
 323  * @model:      model name
 324  *
 325  * Description:
 326  *     Search the scsi_dev_info_list for an entry matching @vendor and
 327  *     @model, if found, return the matching flags value, else return
 328  *     the host or global default settings.
 329  **/
 330 int scsi_get_device_flags(struct scsi_device *sdev, unsigned char *vendor,
 331                           unsigned char *model)
 332 {
 333         struct scsi_dev_info_list *devinfo;
 334         unsigned int bflags;
 335
 336         bflags = sdev->sdev_bflags;
 337         if (!bflags)
 338                 bflags = scsi_default_dev_flags;
 339
 340         list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
 341                 if (devinfo->compatible) {
 342                         /*
 343                          * Behave like the older version of get_device_flags.
 344                          */
 345                         size_t max;
 346                         /*
 347                          * XXX why skip leading spaces? If an odd INQUIRY
 348                          * value, that should have been part of the
 349                          * scsi_static_device_list[] entry, such as "  FOO"
 350                          * rather than "FOO". Since this code is already
 351                          * here, and we don't know what device it is
 352                          * trying to work with, leave it as-is.
 353                          */
 354                         max = 8;        /* max length of vendor */
 355                         while ((max > 0) && *vendor == ' ') {
 356                                 max--;
 357                                 vendor++;
 358                         }
 359                         /*
 360                          * XXX removing the following strlen() would be
 361                          * good, using it means that for a an entry not in
 362                          * the list, we scan every byte of every vendor
 363                          * listed in scsi_static_device_list[], and never match
 364                          * a single one (and still have to compare at
 365                          * least the first byte of each vendor).
 366                          */
 367                         if (memcmp(devinfo->vendor, vendor,
 368                                     min(max, strlen(devinfo->vendor))))
 369                                 continue;
 370                         /*
 371                          * Skip spaces again.
 372                          */
 373                         max = 16;       /* max length of model */
 374                         while ((max > 0) && *model == ' ') {
 375                                 max--;
 376                                 model++;
 377                         }
 378                         if (memcmp(devinfo->model, model,
 379                                    min(max, strlen(devinfo->model))))
 380                                 continue;
 381                         return devinfo->flags;
 382                 } else {
 383                         if (!memcmp(devinfo->vendor, vendor,
 384                                      sizeof(devinfo->vendor)) &&
 385                              !memcmp(devinfo->model, model,
 386                                       sizeof(devinfo->model)))
 387                                 return devinfo->flags;
 388                 }
 389         }
 390         return bflags;
 391 }
 392
 393 #ifdef CONFIG_SCSI_PROC_FS
 394 /*
 395  * proc_scsi_dev_info_read: dump the scsi_dev_info_list via
 396  * /proc/scsi/device_info
 397  */
 398 static int proc_scsi_devinfo_read(char *buffer, char **start,
 399                                   off_t offset, int length)
 400 {
 401         struct scsi_dev_info_list *devinfo;
 402         int size, len = 0;
 403         off_t begin = 0;
 404         off_t pos = 0;
 405
 406         list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
 407                 size = sprintf(buffer + len, "'%.8s' '%.16s' 0x%x\n",
 408                         devinfo->vendor, devinfo->model, devinfo->flags);
 409                 len += size;
 410                 pos = begin + len;
 411                 if (pos < offset) {
 412                         len = 0;
 413                         begin = pos;
 414                 }
 415                 if (pos > offset + length)
 416                         goto stop_output;
 417         }
 418
 419 stop_output:
 420         *start = buffer + (offset - begin);     /* Start of wanted data */
 421         len -= (offset - begin);        /* Start slop */
 422         if (len > length)
 423                 len = length;   /* Ending slop */
 424         return (len);
 425 }
 426
 427 /*
 428  * proc_scsi_dev_info_write: allow additions to the scsi_dev_info_list via
 429  * /proc.
 430  *
 431  * Use: echo "vendor:model:flag" > /proc/scsi/device_info
 432  *
 433  * To add a black/white list entry for vendor and model with an integer
 434  * value of flag to the scsi device info list.
 435  */
 436 static int proc_scsi_devinfo_write(struct file *file, const char __user *buf,
 437                                    unsigned long length, void *data)
 438 {
 439         char *buffer;
 440         int err = length;
 441
 442         if (!buf || length>PAGE_SIZE)
 443                 return -EINVAL;
 444         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 445                 return -ENOMEM;
 446         if (copy_from_user(buffer, buf, length)) {
 447                 err =-EFAULT;
 448                 goto out;
 449         }
 450
 451         if (length < PAGE_SIZE)
 452                 buffer[length] = '\0';
 453         else if (buffer[PAGE_SIZE-1]) {
 454                 err = -EINVAL;
 455                 goto out;
 456         }
 457
 458         scsi_dev_info_list_add_str(buffer);
 459
 460 out:
 461         free_page((unsigned long)buffer);
 462         return err;
 463 }
 464 #endif /* CONFIG_SCSI_PROC_FS */
 465
 466 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 467 MODULE_PARM_DESC(dev_flags,
 468          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 469          " list entries for vendor and model with an integer value of flags"
 470          " to the scsi device info list");
 471
 472 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 473 MODULE_PARM_DESC(default_dev_flags,
 474                  "scsi default device flag integer value");
 475
 476 /**
 477  * scsi_dev_info_list_delete: called from scsi.c:exit_scsi to remove
 478  *      the scsi_dev_info_list.
 479  **/
 480 void scsi_exit_devinfo(void)
 481 {
 482         struct list_head *lh, *lh_next;
 483         struct scsi_dev_info_list *devinfo;
 484
 485 #ifdef CONFIG_SCSI_PROC_FS
 486         remove_proc_entry("scsi/device_info", 0);
 487 #endif
 488
 489         list_for_each_safe(lh, lh_next, &scsi_dev_info_list) {
 490                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 491                                      dev_info_list);
 492                 kfree(devinfo);
 493         }
 494 }
 495
 496 /**
 497  * scsi_dev_list_init: set up the dynamic device list.
 498  * @dev_list:   string of device flags to add
 499  *
 500  * Description:
 501  *      Add command line @dev_list entries, then add
 502  *      scsi_static_device_list entries to the scsi device info list.
 503  **/
 504 int scsi_init_devinfo(void)
 505 {
 506 #ifdef CONFIG_SCSI_PROC_FS
 507         struct proc_dir_entry *p;
 508 #endif
 509         int error, i;
 510
 511         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 512         if (error)
 513                 return error;
 514
 515         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 516                 error = scsi_dev_info_list_add(1 /* compatibile */,
 517                                 scsi_static_device_list[i].vendor,
 518                                 scsi_static_device_list[i].model,
 519                                 NULL,
 520                                 scsi_static_device_list[i].flags);
 521                 if (error)
 522                         goto out;
 523         }
 524
 525 #ifdef CONFIG_SCSI_PROC_FS
 526         p = create_proc_entry("scsi/device_info", 0, NULL);
 527         if (!p) {
 528                 error = -ENOMEM;
 529                 goto out;
 530         }
 531
 532         p->owner = THIS_MODULE;
 533         p->get_info = proc_scsi_devinfo_read;
 534         p->write_proc = proc_scsi_devinfo_write;
 535 #endif /* CONFIG_SCSI_PROC_FS */
 536
 537  out:
 538         if (error)
 539                 scsi_exit_devinfo();
 540         return error;
 541 }