LXR linux/drivers/scsi/scsi

   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 */
  19struct 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
  28static const char spaces[] = "                "; /* 16 of them */
  29static unsigned scsi_default_dev_flags;
  30static LIST_HEAD(scsi_dev_info_list);
  31static 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 */
  42static 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        {"IBM", "2104-DU3", NULL, BLIST_NOLUN},         /* locks up */
  60        {"IBM", "2104-TU3", NULL, BLIST_NOLUN},         /* locks up */
  61        {"IMS", "CDD521/10", "2.06", BLIST_NOLUN},      /* locks up */
  62        {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN},     /* locks up */
  63        {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN},     /* locks up */
  64        {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN},   /* locks up */
  65        {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN},     /* locks up */
  66        {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN},     /* locks up */
  67        {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN},    /* responds to all lun */
  68        {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN},      /* responds to all lun */
  69        {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
  70        {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN},    /* responds to all lun */
  71        {"RODIME", "RO3000S", "2.33", BLIST_NOLUN},     /* locks up */
  72        {"SUN", "SENA", NULL, BLIST_NOLUN},             /* responds to all luns */
  73        /*
  74         * The following causes a failed REQUEST SENSE on lun 1 for
  75         * aha152x controller, which causes SCSI code to reset bus.
  76         */
  77        {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
  78        /*
  79         * The following causes a failed REQUEST SENSE on lun 1 for
  80         * aha152x controller, which causes SCSI code to reset bus.
  81         */
  82        {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
  83        {"SEAGATE", "ST296", "921", BLIST_NOLUN},       /* responds to all lun */
  84        {"SEAGATE", "ST1581", "6538", BLIST_NOLUN},     /* responds to all lun */
  85        {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
  86        {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
  87        {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
  88        {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
  89        {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
  90        {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN},   /* locks up */
  91        {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN},       /* locks up */
  92        /*
  93         * The following causes a failed REQUEST SENSE on lun 1 for
  94         * seagate controller, which causes SCSI code to reset bus.
  95         */
  96        {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
  97        {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN},        /* responds to all lun */
  98        /*
  99         * The following causes a failed REQUEST SENSE on lun 1 for
 100         * seagate controller, which causes SCSI code to reset bus.
 101         */
 102        {"HP", "C1750A", "3226", BLIST_NOLUN},          /* scanjet iic */
 103        {"HP", "C1790A", "", BLIST_NOLUN},              /* scanjet iip */
 104        {"HP", "C2500A", "", BLIST_NOLUN},              /* scanjet iicx */
 105        {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
 106        {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN},      /* responds to all lun */
 107        {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN},     /* locks up */
 108        {"NEC", "D3856", "0009", BLIST_NOLUN},
 109        {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN},    /* locks up */
 110        {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN},    /* locks up */
 111        {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN},    /* locks up */
 112        {"RELISYS", "Scorpio", NULL, BLIST_NOLUN},      /* responds to all lun */
 113        {"SANKYO", "CP525", "6.64", BLIST_NOLUN},       /* causes failed REQ SENSE, extra reset */
 114        {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
 115        {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
 116        {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN},      /* locks up */
 117        {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN},      /* locks up */
 118        {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN},     /* locks up */
 119        {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN},    /* locks up */
 120        {"", "Scanner", "1.80", BLIST_NOLUN},   /* responds to all lun */
 121
 122        /*
 123         * Other types of devices that have special flags.
 124         * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
 125         */
 126        {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
 127        {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
 128        {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
 129        {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
 130        {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_FORCELUN | BLIST_INQUIRY_36},
 131        {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
 132        {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
 133        {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
 134        {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
 135        {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
 136        {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
 137        {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
 138        {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
 139                BLIST_MAX_512 | BLIST_REPORTLUN2},      /* Compaq RA4x00 */
 140        {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
 141        {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
 142        {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 143        {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 144        {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 145        {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
 146        {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 147        {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
 148        {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
 149        {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
 150        {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
 151        {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
 152        {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
 153        {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
 154        {"EMC",  "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 155        {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
 156        {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
 157        {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
 158        {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
 159        {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
 160        {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 161        {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
 162        {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
 163        {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
 164        {"HITACHI", "DF400", "*", BLIST_SPARSELUN},
 165        {"HITACHI", "DF500", "*", BLIST_SPARSELUN},
 166        {"HITACHI", "DF600", "*", BLIST_SPARSELUN},
 167        {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
 168        {"HITACHI", "OPEN-E", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
 169        {"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 170        {"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 171        {"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 172        {"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 173        {"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 174        {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 175        {"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
 176        {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 177        {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 178        {"HP", "C1557A", NULL, BLIST_FORCELUN},
 179        {"HP", "C3323-300", "4269", BLIST_NOTQ},
 180        {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
 181        {"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 182        {"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 183        {"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 184        {"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 185        {"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 186        {"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 187        {"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 188        {"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 189        {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 190        {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 191        {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
 192        {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 193        {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 194        {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 195        {"INSITE", "I325VM", NULL, BLIST_KEY},
 196        {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 197        {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 198        {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 199        {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 200        {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 201        {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 202        {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 203        {"MICROP", "4110", NULL, BLIST_NOTQ},
 204        {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 205        {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 206        {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 207        {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 208        {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 209        {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 210        {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 211        {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 212        {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 213        {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 214        {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 215        {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 216        {"Promise", "", NULL, BLIST_SPARSELUN},
 217        {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 218        {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 219        {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 220        {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 221        {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 222        {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 223        {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 224        {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 225        {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 226        {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 227        {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 228        {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 229        {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 230        {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 231        {"SUN", "T300", "*", BLIST_SPARSELUN},
 232        {"SUN", "T4", "*", BLIST_SPARSELUN},
 233        {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
 234        {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 235        {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 236        {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 237        {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 238        {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 239        {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 240        {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 241        {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 242        {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 243        {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 244        {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 245        { NULL, NULL, NULL, 0 },
 246};
 247
 248/*
 249 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 250 * devinfo vendor and model strings.
 251 */
 252static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 253                                char *from, int compatible)
 254{
 255        size_t from_length;
 256
 257        from_length = strlen(from);
 258        strncpy(to, from, min(to_length, from_length));
 259        if (from_length < to_length) {
 260                if (compatible) {
 261                        /*
 262                         * NUL terminate the string if it is short.
 263                         */
 264                        to[from_length] = '\0';
 265                } else {
 266                        /* 
 267                         * space pad the string if it is short. 
 268                         */
 269                        strncpy(&to[from_length], spaces,
 270                                to_length - from_length);
 271                }
 272        }
 273        if (from_length > to_length)
 274                 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 275                        __func__, name, from);
 276}
 277
 278/**
 279 * scsi_dev_info_list_add - add one dev_info list entry.
 280 * @compatible: if true, null terminate short strings.  Otherwise space pad.
 281 * @vendor:     vendor string
 282 * @model:      model (product) string
 283 * @strflags:   integer string
 284 * @flags:      if strflags NULL, use this flag value
 285 *
 286 * Description:
 287 *      Create and add one dev_info entry for @vendor, @model, @strflags or
 288 *      @flag. If @compatible, add to the tail of the list, do not space
 289 *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 290 *      are added with @compatible 1 and @clfags NULL.
 291 *
 292 * Returns: 0 OK, -error on failure.
 293 **/
 294static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 295                            char *strflags, int flags)
 296{
 297        struct scsi_dev_info_list *devinfo;
 298
 299        devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 300        if (!devinfo) {
 301                printk(KERN_ERR "%s: no memory\n", __func__);
 302                return -ENOMEM;
 303        }
 304
 305        scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 306                            vendor, compatible);
 307        scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 308                            model, compatible);
 309
 310        if (strflags)
 311                devinfo->flags = simple_strtoul(strflags, NULL, 0);
 312        else
 313                devinfo->flags = flags;
 314
 315        devinfo->compatible = compatible;
 316
 317        if (compatible)
 318                list_add_tail(&devinfo->dev_info_list, &scsi_dev_info_list);
 319        else
 320                list_add(&devinfo->dev_info_list, &scsi_dev_info_list);
 321
 322        return 0;
 323}
 324
 325/**
 326 * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 327 * @dev_list:   string of device flags to add
 328 *
 329 * Description:
 330 *      Parse dev_list, and add entries to the scsi_dev_info_list.
 331 *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 332 *      dev_list is modified via strsep. Can be called for command line
 333 *      addition, for proc or mabye a sysfs interface.
 334 *
 335 * Returns: 0 if OK, -error on failure.
 336 **/
 337static int scsi_dev_info_list_add_str(char *dev_list)
 338{
 339        char *vendor, *model, *strflags, *next;
 340        char *next_check;
 341        int res = 0;
 342
 343        next = dev_list;
 344        if (next && next[0] == '"') {
 345                /*
 346                 * Ignore both the leading and trailing quote.
 347                 */
 348                next++;
 349                next_check = ",\"";
 350        } else {
 351                next_check = ",";
 352        }
 353
 354        /*
 355         * For the leading and trailing '"' case, the for loop comes
 356         * through the last time with vendor[0] == '\0'.
 357         */
 358        for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 359             && (res == 0); vendor = strsep(&next, ":")) {
 360                strflags = NULL;
 361                model = strsep(&next, ":");
 362                if (model)
 363                        strflags = strsep(&next, next_check);
 364                if (!model || !strflags) {
 365                        printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 366                               " '%s'\n", __func__, vendor, model,
 367                               strflags);
 368                        res = -EINVAL;
 369                } else
 370                        res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 371                                                     model, strflags, 0);
 372        }
 373        return res;
 374}
 375
 376/**
 377 * get_device_flags - get device specific flags from the dynamic device list.
 378 * @sdev:       &scsi_device to get flags for
 379 * @vendor:     vendor name
 380 * @model:      model name
 381 *
 382 * Description:
 383 *     Search the scsi_dev_info_list for an entry matching @vendor and
 384 *     @model, if found, return the matching flags value, else return
 385 *     the host or global default settings.  Called during scan time.
 386 **/
 387int scsi_get_device_flags(struct scsi_device *sdev,
 388                          const unsigned char *vendor,
 389                          const unsigned char *model)
 390{
 391        struct scsi_dev_info_list *devinfo;
 392        unsigned int bflags;
 393
 394        bflags = sdev->sdev_bflags;
 395        if (!bflags)
 396                bflags = scsi_default_dev_flags;
 397
 398        list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
 399                if (devinfo->compatible) {
 400                        /*
 401                         * Behave like the older version of get_device_flags.
 402                         */
 403                        size_t max;
 404                        /*
 405                         * XXX why skip leading spaces? If an odd INQUIRY
 406                         * value, that should have been part of the
 407                         * scsi_static_device_list[] entry, such as "  FOO"
 408                         * rather than "FOO". Since this code is already
 409                         * here, and we don't know what device it is
 410                         * trying to work with, leave it as-is.
 411                         */
 412                        max = 8;        /* max length of vendor */
 413                        while ((max > 0) && *vendor == ' ') {
 414                                max--;
 415                                vendor++;
 416                        }
 417                        /*
 418                         * XXX removing the following strlen() would be
 419                         * good, using it means that for a an entry not in
 420                         * the list, we scan every byte of every vendor
 421                         * listed in scsi_static_device_list[], and never match
 422                         * a single one (and still have to compare at
 423                         * least the first byte of each vendor).
 424                         */
 425                        if (memcmp(devinfo->vendor, vendor,
 426                                    min(max, strlen(devinfo->vendor))))
 427                                continue;
 428                        /*
 429                         * Skip spaces again.
 430                         */
 431                        max = 16;       /* max length of model */
 432                        while ((max > 0) && *model == ' ') {
 433                                max--;
 434                                model++;
 435                        }
 436                        if (memcmp(devinfo->model, model,
 437                                   min(max, strlen(devinfo->model))))
 438                                continue;
 439                        return devinfo->flags;
 440                } else {
 441                        if (!memcmp(devinfo->vendor, vendor,
 442                                     sizeof(devinfo->vendor)) &&
 443                             !memcmp(devinfo->model, model,
 444                                      sizeof(devinfo->model)))
 445                                return devinfo->flags;
 446                }
 447        }
 448        return bflags;
 449}
 450
 451#ifdef CONFIG_SCSI_PROC_FS
 452static int devinfo_seq_show(struct seq_file *m, void *v)
 453{
 454        struct scsi_dev_info_list *devinfo =
 455                list_entry(v, struct scsi_dev_info_list, dev_info_list);
 456
 457        seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
 458                        devinfo->vendor, devinfo->model, devinfo->flags);
 459        return 0;
 460}
 461
 462static void * devinfo_seq_start(struct seq_file *m, loff_t *pos)
 463{
 464        return seq_list_start(&scsi_dev_info_list, *pos);
 465}
 466
 467static void * devinfo_seq_next(struct seq_file *m, void *v, loff_t *pos)
 468{
 469        return seq_list_next(v, &scsi_dev_info_list, pos);
 470}
 471
 472static void devinfo_seq_stop(struct seq_file *m, void *v)
 473{
 474}
 475
 476static const struct seq_operations scsi_devinfo_seq_ops = {
 477        .start  = devinfo_seq_start,
 478        .next   = devinfo_seq_next,
 479        .stop   = devinfo_seq_stop,
 480        .show   = devinfo_seq_show,
 481};
 482
 483static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 484{
 485        return seq_open(file, &scsi_devinfo_seq_ops);
 486}
 487
 488/* 
 489 * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 490 *
 491 * Description: Adds a black/white list entry for vendor and model with an
 492 * integer value of flag to the scsi device info list.
 493 * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 494 */
 495static ssize_t proc_scsi_devinfo_write(struct file *file,
 496                                       const char __user *buf,
 497                                       size_t length, loff_t *ppos)
 498{
 499        char *buffer;
 500        ssize_t err = length;
 501
 502        if (!buf || length>PAGE_SIZE)
 503                return -EINVAL;
 504        if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 505                return -ENOMEM;
 506        if (copy_from_user(buffer, buf, length)) {
 507                err =-EFAULT;
 508                goto out;
 509        }
 510
 511        if (length < PAGE_SIZE)
 512                buffer[length] = '\0';
 513        else if (buffer[PAGE_SIZE-1]) {
 514                err = -EINVAL;
 515                goto out;
 516        }
 517
 518        scsi_dev_info_list_add_str(buffer);
 519
 520out:
 521        free_page((unsigned long)buffer);
 522        return err;
 523}
 524
 525static const struct file_operations scsi_devinfo_proc_fops = {
 526        .owner          = THIS_MODULE,
 527        .open           = proc_scsi_devinfo_open,
 528        .read           = seq_read,
 529        .write          = proc_scsi_devinfo_write,
 530        .llseek         = seq_lseek,
 531        .release        = seq_release,
 532};
 533#endif /* CONFIG_SCSI_PROC_FS */
 534
 535module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 536MODULE_PARM_DESC(dev_flags,
 537         "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 538         " list entries for vendor and model with an integer value of flags"
 539         " to the scsi device info list");
 540
 541module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 542MODULE_PARM_DESC(default_dev_flags,
 543                 "scsi default device flag integer value");
 544
 545/**
 546 * scsi_dev_info_list_delete - called from scsi.c:exit_scsi to remove the scsi_dev_info_list.
 547 **/
 548void scsi_exit_devinfo(void)
 549{
 550        struct list_head *lh, *lh_next;
 551        struct scsi_dev_info_list *devinfo;
 552
 553#ifdef CONFIG_SCSI_PROC_FS
 554        remove_proc_entry("scsi/device_info", NULL);
 555#endif
 556
 557        list_for_each_safe(lh, lh_next, &scsi_dev_info_list) {
 558                devinfo = list_entry(lh, struct scsi_dev_info_list,
 559                                     dev_info_list);
 560                kfree(devinfo);
 561        }
 562}
 563
 564/**
 565 * scsi_init_devinfo - set up the dynamic device list.
 566 *
 567 * Description:
 568 *      Add command line entries from scsi_dev_flags, then add
 569 *      scsi_static_device_list entries to the scsi device info list.
 570 */
 571int __init scsi_init_devinfo(void)
 572{
 573#ifdef CONFIG_SCSI_PROC_FS
 574        struct proc_dir_entry *p;
 575#endif
 576        int error, i;
 577
 578        error = scsi_dev_info_list_add_str(scsi_dev_flags);
 579        if (error)
 580                return error;
 581
 582        for (i = 0; scsi_static_device_list[i].vendor; i++) {
 583                error = scsi_dev_info_list_add(1 /* compatibile */,
 584                                scsi_static_device_list[i].vendor,
 585                                scsi_static_device_list[i].model,
 586                                NULL,
 587                                scsi_static_device_list[i].flags);
 588                if (error)
 589                        goto out;
 590        }
 591
 592#ifdef CONFIG_SCSI_PROC_FS
 593        p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
 594        if (!p) {
 595                error = -ENOMEM;
 596                goto out;
 597        }
 598
 599        p->owner = THIS_MODULE;
 600#endif /* CONFIG_SCSI_PROC_FS */
 601
 602 out:
 603        if (error)
 604                scsi_exit_devinfo();
 605        return error;
 606}
 607