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#include <linux/slab.h>
  10
  11#include <scsi/scsi_device.h>
  12#include <scsi/scsi_devinfo.h>
  13
  14#include "scsi_priv.h"
  15
  16
  17/*
  18 * scsi_dev_info_list: structure to hold black/white listed devices.
  19 */
  20struct scsi_dev_info_list {
  21        struct list_head dev_info_list;
  22        char vendor[8];
  23        char model[16];
  24        unsigned flags;
  25        unsigned compatible; /* for use with scsi_static_device_list entries */
  26};
  27
  28struct scsi_dev_info_list_table {
  29        struct list_head node;  /* our node for being on the master list */
  30        struct list_head scsi_dev_info_list; /* head of dev info list */
  31        const char *name;       /* name of list for /proc (NULL for global) */
  32        int key;                /* unique numeric identifier */
  33};
  34
  35
  36static const char spaces[] = "                "; /* 16 of them */
  37static unsigned scsi_default_dev_flags;
  38static LIST_HEAD(scsi_dev_info_list);
  39static char scsi_dev_flags[256];
  40
  41/*
  42 * scsi_static_device_list: deprecated list of devices that require
  43 * settings that differ from the default, includes black-listed (broken)
  44 * devices. The entries here are added to the tail of scsi_dev_info_list
  45 * via scsi_dev_info_list_init.
  46 *
  47 * Do not add to this list, use the command line or proc interface to add
  48 * to the scsi_dev_info_list. This table will eventually go away.
  49 */
  50static struct {
  51        char *vendor;
  52        char *model;
  53        char *revision; /* revision known to be bad, unused */
  54        unsigned flags;
  55} scsi_static_device_list[] __initdata = {
  56        /*
  57         * The following devices are known not to tolerate a lun != 0 scan
  58         * for one reason or another. Some will respond to all luns,
  59         * others will lock up.
  60         */
  61        {"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN},     /* locks up */
  62        {"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN},       /* locks up */
  63        {"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN},       /* locks up */
  64        {"DENON", "DRD-25X", "V", BLIST_NOLUN},                 /* locks up */
  65        {"HITACHI", "DK312C", "CM81", BLIST_NOLUN},     /* responds to all lun */
  66        {"HITACHI", "DK314C", "CR21", BLIST_NOLUN},     /* responds to all lun */
  67        {"IBM", "2104-DU3", NULL, BLIST_NOLUN},         /* locks up */
  68        {"IBM", "2104-TU3", NULL, BLIST_NOLUN},         /* locks up */
  69        {"IMS", "CDD521/10", "2.06", BLIST_NOLUN},      /* locks up */
  70        {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN},     /* locks up */
  71        {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN},     /* locks up */
  72        {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN},   /* locks up */
  73        {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN},     /* locks up */
  74        {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN},     /* locks up */
  75        {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN},    /* responds to all lun */
  76        {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN},      /* responds to all lun */
  77        {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
  78        {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN},    /* responds to all lun */
  79        {"RODIME", "RO3000S", "2.33", BLIST_NOLUN},     /* locks up */
  80        {"SUN", "SENA", NULL, BLIST_NOLUN},             /* responds to all luns */
  81        /*
  82         * The following causes a failed REQUEST SENSE on lun 1 for
  83         * aha152x controller, which causes SCSI code to reset bus.
  84         */
  85        {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
  86        /*
  87         * The following causes a failed REQUEST SENSE on lun 1 for
  88         * aha152x controller, which causes SCSI code to reset bus.
  89         */
  90        {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
  91        {"SEAGATE", "ST296", "921", BLIST_NOLUN},       /* responds to all lun */
  92        {"SEAGATE", "ST1581", "6538", BLIST_NOLUN},     /* responds to all lun */
  93        {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
  94        {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
  95        {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
  96        {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
  97        {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
  98        {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN},   /* locks up */
  99        {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN},       /* locks up */
 100        /*
 101         * The following causes a failed REQUEST SENSE on lun 1 for
 102         * seagate controller, which causes SCSI code to reset bus.
 103         */
 104        {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
 105        {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN},        /* responds to all lun */
 106        /*
 107         * The following causes a failed REQUEST SENSE on lun 1 for
 108         * seagate controller, which causes SCSI code to reset bus.
 109         */
 110        {"HP", "C1750A", "3226", BLIST_NOLUN},          /* scanjet iic */
 111        {"HP", "C1790A", "", BLIST_NOLUN},              /* scanjet iip */
 112        {"HP", "C2500A", "", BLIST_NOLUN},              /* scanjet iicx */
 113        {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
 114        {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN},      /* responds to all lun */
 115        {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN},     /* locks up */
 116        {"NEC", "D3856", "0009", BLIST_NOLUN},
 117        {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN},    /* locks up */
 118        {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN},    /* locks up */
 119        {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN},    /* locks up */
 120        {"RELISYS", "Scorpio", NULL, BLIST_NOLUN},      /* responds to all lun */
 121        {"SANKYO", "CP525", "6.64", BLIST_NOLUN},       /* causes failed REQ SENSE, extra reset */
 122        {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
 123        {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
 124        {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN},      /* locks up */
 125        {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN},      /* locks up */
 126        {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN},     /* locks up */
 127        {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN},    /* locks up */
 128        {"", "Scanner", "1.80", BLIST_NOLUN},   /* responds to all lun */
 129
 130        /*
 131         * Other types of devices that have special flags.
 132         * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
 133         */
 134        {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
 135        {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
 136        {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
 137        {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
 138        {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_FORCELUN | BLIST_INQUIRY_36},
 139        {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
 140        {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
 141        {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
 142        {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
 143        {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
 144        {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
 145        {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
 146        {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
 147                BLIST_MAX_512 | BLIST_REPORTLUN2},      /* Compaq RA4x00 */
 148        {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
 149        {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
 150        {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 151        {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 152        {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 153        {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
 154        {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 155        {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
 156        {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
 157        {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
 158        {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
 159        {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
 160        {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
 161        {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
 162        {"EMC",  "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 163        {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
 164        {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
 165        {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
 166        {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
 167        {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
 168        {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 169        {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
 170        {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
 171        {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
 172        {"HITACHI", "DF400", "*", BLIST_REPORTLUN2},
 173        {"HITACHI", "DF500", "*", BLIST_REPORTLUN2},
 174        {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
 175        {"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2},
 176        {"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 177        {"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 178        {"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 179        {"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 180        {"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 181        {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 182        {"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
 183        {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 184        {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 185        {"HP", "C1557A", NULL, BLIST_FORCELUN},
 186        {"HP", "C3323-300", "4269", BLIST_NOTQ},
 187        {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
 188        {"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 189        {"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 190        {"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 191        {"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 192        {"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 193        {"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 194        {"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 195        {"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 196        {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 197        {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 198        {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
 199        {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 200        {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 201        {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 202        {"INSITE", "I325VM", NULL, BLIST_KEY},
 203        {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 204        {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 205        {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 206        {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 207        {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 208        {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 209        {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 210        {"MICROP", "4110", NULL, BLIST_NOTQ},
 211        {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 212        {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 213        {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 214        {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 215        {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 216        {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 217        {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 218        {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 219        {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 220        {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 221        {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 222        {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 223        {"Promise", "", NULL, BLIST_SPARSELUN},
 224        {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 225        {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 226        {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 227        {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 228        {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 229        {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 230        {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 231        {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 232        {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 233        {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 234        {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 235        {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 236        {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 237        {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 238        {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 239        {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 240        {"SUN", "T300", "*", BLIST_SPARSELUN},
 241        {"SUN", "T4", "*", BLIST_SPARSELUN},
 242        {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
 243        {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 244        {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 245        {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 246        {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 247        {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 248        {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 249        {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 250        {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 251        {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 252        {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 253        {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 254        { NULL, NULL, NULL, 0 },
 255};
 256
 257static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
 258{
 259        struct scsi_dev_info_list_table *devinfo_table;
 260        int found = 0;
 261
 262        list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
 263                if (devinfo_table->key == key) {
 264                        found = 1;
 265                        break;
 266                }
 267        if (!found)
 268                return ERR_PTR(-EINVAL);
 269
 270        return devinfo_table;
 271}
 272
 273/*
 274 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 275 * devinfo vendor and model strings.
 276 */
 277static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 278                                char *from, int compatible)
 279{
 280        size_t from_length;
 281
 282        from_length = strlen(from);
 283        strncpy(to, from, min(to_length, from_length));
 284        if (from_length < to_length) {
 285                if (compatible) {
 286                        /*
 287                         * NUL terminate the string if it is short.
 288                         */
 289                        to[from_length] = '\0';
 290                } else {
 291                        /* 
 292                         * space pad the string if it is short. 
 293                         */
 294                        strncpy(&to[from_length], spaces,
 295                                to_length - from_length);
 296                }
 297        }
 298        if (from_length > to_length)
 299                 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 300                        __func__, name, from);
 301}
 302
 303/**
 304 * scsi_dev_info_list_add - add one dev_info list entry.
 305 * @compatible: if true, null terminate short strings.  Otherwise space pad.
 306 * @vendor:     vendor string
 307 * @model:      model (product) string
 308 * @strflags:   integer string
 309 * @flags:      if strflags NULL, use this flag value
 310 *
 311 * Description:
 312 *      Create and add one dev_info entry for @vendor, @model, @strflags or
 313 *      @flag. If @compatible, add to the tail of the list, do not space
 314 *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 315 *      are added with @compatible 1 and @clfags NULL.
 316 *
 317 * Returns: 0 OK, -error on failure.
 318 **/
 319static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 320                            char *strflags, int flags)
 321{
 322        return scsi_dev_info_list_add_keyed(compatible, vendor, model,
 323                                            strflags, flags,
 324                                            SCSI_DEVINFO_GLOBAL);
 325}
 326
 327/**
 328 * scsi_dev_info_list_add_keyed - add one dev_info list entry.
 329 * @compatible: if true, null terminate short strings.  Otherwise space pad.
 330 * @vendor:     vendor string
 331 * @model:      model (product) string
 332 * @strflags:   integer string
 333 * @flags:      if strflags NULL, use this flag value
 334 * @key:        specify list to use
 335 *
 336 * Description:
 337 *      Create and add one dev_info entry for @vendor, @model,
 338 *      @strflags or @flag in list specified by @key. If @compatible,
 339 *      add to the tail of the list, do not space pad, and set
 340 *      devinfo->compatible. The scsi_static_device_list entries are
 341 *      added with @compatible 1 and @clfags NULL.
 342 *
 343 * Returns: 0 OK, -error on failure.
 344 **/
 345int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
 346                                 char *strflags, int flags, int key)
 347{
 348        struct scsi_dev_info_list *devinfo;
 349        struct scsi_dev_info_list_table *devinfo_table =
 350                scsi_devinfo_lookup_by_key(key);
 351
 352        if (IS_ERR(devinfo_table))
 353                return PTR_ERR(devinfo_table);
 354
 355        devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 356        if (!devinfo) {
 357                printk(KERN_ERR "%s: no memory\n", __func__);
 358                return -ENOMEM;
 359        }
 360
 361        scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 362                            vendor, compatible);
 363        scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 364                            model, compatible);
 365
 366        if (strflags)
 367                devinfo->flags = simple_strtoul(strflags, NULL, 0);
 368        else
 369                devinfo->flags = flags;
 370
 371        devinfo->compatible = compatible;
 372
 373        if (compatible)
 374                list_add_tail(&devinfo->dev_info_list,
 375                              &devinfo_table->scsi_dev_info_list);
 376        else
 377                list_add(&devinfo->dev_info_list,
 378                         &devinfo_table->scsi_dev_info_list);
 379
 380        return 0;
 381}
 382EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
 383
 384/**
 385 * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
 386 * @vendor:     vendor string
 387 * @model:      model (product) string
 388 * @key:        specify list to use
 389 *
 390 * Description:
 391 *      Remove and destroy one dev_info entry for @vendor, @model
 392 *      in list specified by @key.
 393 *
 394 * Returns: 0 OK, -error on failure.
 395 **/
 396int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key)
 397{
 398        struct scsi_dev_info_list *devinfo, *found = NULL;
 399        struct scsi_dev_info_list_table *devinfo_table =
 400                scsi_devinfo_lookup_by_key(key);
 401
 402        if (IS_ERR(devinfo_table))
 403                return PTR_ERR(devinfo_table);
 404
 405        list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 406                            dev_info_list) {
 407                if (devinfo->compatible) {
 408                        /*
 409                         * Behave like the older version of get_device_flags.
 410                         */
 411                        size_t max;
 412                        /*
 413                         * XXX why skip leading spaces? If an odd INQUIRY
 414                         * value, that should have been part of the
 415                         * scsi_static_device_list[] entry, such as "  FOO"
 416                         * rather than "FOO". Since this code is already
 417                         * here, and we don't know what device it is
 418                         * trying to work with, leave it as-is.
 419                         */
 420                        max = 8;        /* max length of vendor */
 421                        while ((max > 0) && *vendor == ' ') {
 422                                max--;
 423                                vendor++;
 424                        }
 425                        /*
 426                         * XXX removing the following strlen() would be
 427                         * good, using it means that for a an entry not in
 428                         * the list, we scan every byte of every vendor
 429                         * listed in scsi_static_device_list[], and never match
 430                         * a single one (and still have to compare at
 431                         * least the first byte of each vendor).
 432                         */
 433                        if (memcmp(devinfo->vendor, vendor,
 434                                    min(max, strlen(devinfo->vendor))))
 435                                continue;
 436                        /*
 437                         * Skip spaces again.
 438                         */
 439                        max = 16;       /* max length of model */
 440                        while ((max > 0) && *model == ' ') {
 441                                max--;
 442                                model++;
 443                        }
 444                        if (memcmp(devinfo->model, model,
 445                                   min(max, strlen(devinfo->model))))
 446                                continue;
 447                        found = devinfo;
 448                } else {
 449                        if (!memcmp(devinfo->vendor, vendor,
 450                                     sizeof(devinfo->vendor)) &&
 451                             !memcmp(devinfo->model, model,
 452                                      sizeof(devinfo->model)))
 453                                found = devinfo;
 454                }
 455                if (found)
 456                        break;
 457        }
 458
 459        if (found) {
 460                list_del(&found->dev_info_list);
 461                kfree(found);
 462                return 0;
 463        }
 464
 465        return -ENOENT;
 466}
 467EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
 468
 469/**
 470 * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 471 * @dev_list:   string of device flags to add
 472 *
 473 * Description:
 474 *      Parse dev_list, and add entries to the scsi_dev_info_list.
 475 *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 476 *      dev_list is modified via strsep. Can be called for command line
 477 *      addition, for proc or mabye a sysfs interface.
 478 *
 479 * Returns: 0 if OK, -error on failure.
 480 **/
 481static int scsi_dev_info_list_add_str(char *dev_list)
 482{
 483        char *vendor, *model, *strflags, *next;
 484        char *next_check;
 485        int res = 0;
 486
 487        next = dev_list;
 488        if (next && next[0] == '"') {
 489                /*
 490                 * Ignore both the leading and trailing quote.
 491                 */
 492                next++;
 493                next_check = ",\"";
 494        } else {
 495                next_check = ",";
 496        }
 497
 498        /*
 499         * For the leading and trailing '"' case, the for loop comes
 500         * through the last time with vendor[0] == '\0'.
 501         */
 502        for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 503             && (res == 0); vendor = strsep(&next, ":")) {
 504                strflags = NULL;
 505                model = strsep(&next, ":");
 506                if (model)
 507                        strflags = strsep(&next, next_check);
 508                if (!model || !strflags) {
 509                        printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 510                               " '%s'\n", __func__, vendor, model,
 511                               strflags);
 512                        res = -EINVAL;
 513                } else
 514                        res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 515                                                     model, strflags, 0);
 516        }
 517        return res;
 518}
 519
 520/**
 521 * get_device_flags - get device specific flags from the dynamic device list.
 522 * @sdev:       &scsi_device to get flags for
 523 * @vendor:     vendor name
 524 * @model:      model name
 525 *
 526 * Description:
 527 *     Search the global scsi_dev_info_list (specified by list zero)
 528 *     for an entry matching @vendor and @model, if found, return the
 529 *     matching flags value, else return the host or global default
 530 *     settings.  Called during scan time.
 531 **/
 532int scsi_get_device_flags(struct scsi_device *sdev,
 533                          const unsigned char *vendor,
 534                          const unsigned char *model)
 535{
 536        return scsi_get_device_flags_keyed(sdev, vendor, model,
 537                                           SCSI_DEVINFO_GLOBAL);
 538}
 539
 540
 541/**
 542 * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
 543 * @sdev:       &scsi_device to get flags for
 544 * @vendor:     vendor name
 545 * @model:      model name
 546 * @key:        list to look up
 547 *
 548 * Description:
 549 *     Search the scsi_dev_info_list specified by @key for an entry
 550 *     matching @vendor and @model, if found, return the matching
 551 *     flags value, else return the host or global default settings.
 552 *     Called during scan time.
 553 **/
 554int scsi_get_device_flags_keyed(struct scsi_device *sdev,
 555                                const unsigned char *vendor,
 556                                const unsigned char *model,
 557                                int key)
 558{
 559        struct scsi_dev_info_list *devinfo;
 560        struct scsi_dev_info_list_table *devinfo_table;
 561
 562        devinfo_table = scsi_devinfo_lookup_by_key(key);
 563
 564        if (IS_ERR(devinfo_table))
 565                return PTR_ERR(devinfo_table);
 566
 567        list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 568                            dev_info_list) {
 569                if (devinfo->compatible) {
 570                        /*
 571                         * Behave like the older version of get_device_flags.
 572                         */
 573                        size_t max;
 574                        /*
 575                         * XXX why skip leading spaces? If an odd INQUIRY
 576                         * value, that should have been part of the
 577                         * scsi_static_device_list[] entry, such as "  FOO"
 578                         * rather than "FOO". Since this code is already
 579                         * here, and we don't know what device it is
 580                         * trying to work with, leave it as-is.
 581                         */
 582                        max = 8;        /* max length of vendor */
 583                        while ((max > 0) && *vendor == ' ') {
 584                                max--;
 585                                vendor++;
 586                        }
 587                        /*
 588                         * XXX removing the following strlen() would be
 589                         * good, using it means that for a an entry not in
 590                         * the list, we scan every byte of every vendor
 591                         * listed in scsi_static_device_list[], and never match
 592                         * a single one (and still have to compare at
 593                         * least the first byte of each vendor).
 594                         */
 595                        if (memcmp(devinfo->vendor, vendor,
 596                                    min(max, strlen(devinfo->vendor))))
 597                                continue;
 598                        /*
 599                         * Skip spaces again.
 600                         */
 601                        max = 16;       /* max length of model */
 602                        while ((max > 0) && *model == ' ') {
 603                                max--;
 604                                model++;
 605                        }
 606                        if (memcmp(devinfo->model, model,
 607                                   min(max, strlen(devinfo->model))))
 608                                continue;
 609                        return devinfo->flags;
 610                } else {
 611                        if (!memcmp(devinfo->vendor, vendor,
 612                                     sizeof(devinfo->vendor)) &&
 613                             !memcmp(devinfo->model, model,
 614                                      sizeof(devinfo->model)))
 615                                return devinfo->flags;
 616                }
 617        }
 618        /* nothing found, return nothing */
 619        if (key != SCSI_DEVINFO_GLOBAL)
 620                return 0;
 621
 622        /* except for the global list, where we have an exception */
 623        if (sdev->sdev_bflags)
 624                return sdev->sdev_bflags;
 625
 626        return scsi_default_dev_flags;
 627}
 628EXPORT_SYMBOL(scsi_get_device_flags_keyed);
 629
 630#ifdef CONFIG_SCSI_PROC_FS
 631struct double_list {
 632        struct list_head *top;
 633        struct list_head *bottom;
 634};
 635
 636static int devinfo_seq_show(struct seq_file *m, void *v)
 637{
 638        struct double_list *dl = v;
 639        struct scsi_dev_info_list_table *devinfo_table =
 640                list_entry(dl->top, struct scsi_dev_info_list_table, node);
 641        struct scsi_dev_info_list *devinfo =
 642                list_entry(dl->bottom, struct scsi_dev_info_list,
 643                           dev_info_list);
 644
 645        if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
 646            devinfo_table->name)
 647                seq_printf(m, "[%s]:\n", devinfo_table->name);
 648
 649        seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
 650                   devinfo->vendor, devinfo->model, devinfo->flags);
 651        return 0;
 652}
 653
 654static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
 655{
 656        struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
 657        loff_t pos = *ppos;
 658
 659        if (!dl)
 660                return NULL;
 661
 662        list_for_each(dl->top, &scsi_dev_info_list) {
 663                struct scsi_dev_info_list_table *devinfo_table =
 664                        list_entry(dl->top, struct scsi_dev_info_list_table,
 665                                   node);
 666                list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
 667                        if (pos-- == 0)
 668                                return dl;
 669        }
 670
 671        kfree(dl);
 672        return NULL;
 673}
 674
 675static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
 676{
 677        struct double_list *dl = v;
 678        struct scsi_dev_info_list_table *devinfo_table =
 679                list_entry(dl->top, struct scsi_dev_info_list_table, node);
 680
 681        ++*ppos;
 682        dl->bottom = dl->bottom->next;
 683        while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
 684                dl->top = dl->top->next;
 685                if (dl->top == &scsi_dev_info_list) {
 686                        kfree(dl);
 687                        return NULL;
 688                }
 689                devinfo_table = list_entry(dl->top,
 690                                           struct scsi_dev_info_list_table,
 691                                           node);
 692                dl->bottom = devinfo_table->scsi_dev_info_list.next;
 693        }
 694
 695        return dl;
 696}
 697
 698static void devinfo_seq_stop(struct seq_file *m, void *v)
 699{
 700        kfree(v);
 701}
 702
 703static const struct seq_operations scsi_devinfo_seq_ops = {
 704        .start  = devinfo_seq_start,
 705        .next   = devinfo_seq_next,
 706        .stop   = devinfo_seq_stop,
 707        .show   = devinfo_seq_show,
 708};
 709
 710static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 711{
 712        return seq_open(file, &scsi_devinfo_seq_ops);
 713}
 714
 715/* 
 716 * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 717 *
 718 * Description: Adds a black/white list entry for vendor and model with an
 719 * integer value of flag to the scsi device info list.
 720 * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 721 */
 722static ssize_t proc_scsi_devinfo_write(struct file *file,
 723                                       const char __user *buf,
 724                                       size_t length, loff_t *ppos)
 725{
 726        char *buffer;
 727        ssize_t err = length;
 728
 729        if (!buf || length>PAGE_SIZE)
 730                return -EINVAL;
 731        if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 732                return -ENOMEM;
 733        if (copy_from_user(buffer, buf, length)) {
 734                err =-EFAULT;
 735                goto out;
 736        }
 737
 738        if (length < PAGE_SIZE)
 739                buffer[length] = '\0';
 740        else if (buffer[PAGE_SIZE-1]) {
 741                err = -EINVAL;
 742                goto out;
 743        }
 744
 745        scsi_dev_info_list_add_str(buffer);
 746
 747out:
 748        free_page((unsigned long)buffer);
 749        return err;
 750}
 751
 752static const struct file_operations scsi_devinfo_proc_fops = {
 753        .owner          = THIS_MODULE,
 754        .open           = proc_scsi_devinfo_open,
 755        .read           = seq_read,
 756        .write          = proc_scsi_devinfo_write,
 757        .llseek         = seq_lseek,
 758        .release        = seq_release,
 759};
 760#endif /* CONFIG_SCSI_PROC_FS */
 761
 762module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 763MODULE_PARM_DESC(dev_flags,
 764         "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 765         " list entries for vendor and model with an integer value of flags"
 766         " to the scsi device info list");
 767
 768module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 769MODULE_PARM_DESC(default_dev_flags,
 770                 "scsi default device flag integer value");
 771
 772/**
 773 * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 774 **/
 775void scsi_exit_devinfo(void)
 776{
 777#ifdef CONFIG_SCSI_PROC_FS
 778        remove_proc_entry("scsi/device_info", NULL);
 779#endif
 780
 781        scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 782}
 783
 784/**
 785 * scsi_dev_info_add_list - add a new devinfo list
 786 * @key:        key of the list to add
 787 * @name:       Name of the list to add (for /proc/scsi/device_info)
 788 *
 789 * Adds the requested list, returns zero on success, -EEXIST if the
 790 * key is already registered to a list, or other error on failure.
 791 */
 792int scsi_dev_info_add_list(int key, const char *name)
 793{
 794        struct scsi_dev_info_list_table *devinfo_table =
 795                scsi_devinfo_lookup_by_key(key);
 796
 797        if (!IS_ERR(devinfo_table))
 798                /* list already exists */
 799                return -EEXIST;
 800
 801        devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 802
 803        if (!devinfo_table)
 804                return -ENOMEM;
 805
 806        INIT_LIST_HEAD(&devinfo_table->node);
 807        INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 808        devinfo_table->name = name;
 809        devinfo_table->key = key;
 810        list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 811
 812        return 0;
 813}
 814EXPORT_SYMBOL(scsi_dev_info_add_list);
 815
 816/**
 817 * scsi_dev_info_remove_list - destroy an added devinfo list
 818 * @key: key of the list to destroy
 819 *
 820 * Iterates over the entire list first, freeing all the values, then
 821 * frees the list itself.  Returns 0 on success or -EINVAL if the key
 822 * can't be found.
 823 */
 824int scsi_dev_info_remove_list(int key)
 825{
 826        struct list_head *lh, *lh_next;
 827        struct scsi_dev_info_list_table *devinfo_table =
 828                scsi_devinfo_lookup_by_key(key);
 829
 830        if (IS_ERR(devinfo_table))
 831                /* no such list */
 832                return -EINVAL;
 833
 834        /* remove from the master list */
 835        list_del(&devinfo_table->node);
 836
 837        list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 838                struct scsi_dev_info_list *devinfo;
 839
 840                devinfo = list_entry(lh, struct scsi_dev_info_list,
 841                                     dev_info_list);
 842                kfree(devinfo);
 843        }
 844        kfree(devinfo_table);
 845
 846        return 0;
 847}
 848EXPORT_SYMBOL(scsi_dev_info_remove_list);
 849
 850/**
 851 * scsi_init_devinfo - set up the dynamic device list.
 852 *
 853 * Description:
 854 *      Add command line entries from scsi_dev_flags, then add
 855 *      scsi_static_device_list entries to the scsi device info list.
 856 */
 857int __init scsi_init_devinfo(void)
 858{
 859#ifdef CONFIG_SCSI_PROC_FS
 860        struct proc_dir_entry *p;
 861#endif
 862        int error, i;
 863
 864        error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 865        if (error)
 866                return error;
 867
 868        error = scsi_dev_info_list_add_str(scsi_dev_flags);
 869        if (error)
 870                goto out;
 871
 872        for (i = 0; scsi_static_device_list[i].vendor; i++) {
 873                error = scsi_dev_info_list_add(1 /* compatibile */,
 874                                scsi_static_device_list[i].vendor,
 875                                scsi_static_device_list[i].model,
 876                                NULL,
 877                                scsi_static_device_list[i].flags);
 878                if (error)
 879                        goto out;
 880        }
 881
 882#ifdef CONFIG_SCSI_PROC_FS
 883        p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
 884        if (!p) {
 885                error = -ENOMEM;
 886                goto out;
 887        }
 888#endif /* CONFIG_SCSI_PROC_FS */
 889
 890 out:
 891        if (error)
 892                scsi_exit_devinfo();
 893        return error;
 894}
 895