linux/drivers/scsi/scsi_devinfo.c
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   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", "HUS1530", "*", BLIST_NO_DIF},
 176        {"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2},
 177        {"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 178        {"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 179        {"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 180        {"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 181        {"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 182        {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 183        {"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
 184        {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 185        {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 186        {"HP", "C1557A", NULL, BLIST_FORCELUN},
 187        {"HP", "C3323-300", "4269", BLIST_NOTQ},
 188        {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
 189        {"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 190        {"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 191        {"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 192        {"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 193        {"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 194        {"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 195        {"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 196        {"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 197        {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 198        {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 199        {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
 200        {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 201        {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
 202        {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 203        {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 204        {"INSITE", "I325VM", NULL, BLIST_KEY},
 205        {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 206        {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 207        {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 208        {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 209        {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 210        {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 211        {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 212        {"MICROP", "4110", NULL, BLIST_NOTQ},
 213        {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 214        {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 215        {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 216        {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 217        {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 218        {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 219        {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 220        {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 221        {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 222        {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 223        {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 224        {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 225        {"Promise", "", NULL, BLIST_SPARSELUN},
 226        {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 227        {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 228        {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 229        {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 230        {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 231        {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 232        {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 233        {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 234        {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 235        {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 236        {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 237        {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 238        {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 239        {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 240        {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 241        {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 242        {"SUN", "T300", "*", BLIST_SPARSELUN},
 243        {"SUN", "T4", "*", BLIST_SPARSELUN},
 244        {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
 245        {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 246        {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 247        {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 248        {"Traxdata", "CDR4120", NULL, BLIST_NOLUN},     /* locks up */
 249        {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 250        {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 251        {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 252        {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 253        {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 254        {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 255        {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 256        {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 257        { NULL, NULL, NULL, 0 },
 258};
 259
 260static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
 261{
 262        struct scsi_dev_info_list_table *devinfo_table;
 263        int found = 0;
 264
 265        list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
 266                if (devinfo_table->key == key) {
 267                        found = 1;
 268                        break;
 269                }
 270        if (!found)
 271                return ERR_PTR(-EINVAL);
 272
 273        return devinfo_table;
 274}
 275
 276/*
 277 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 278 * devinfo vendor and model strings.
 279 */
 280static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 281                                char *from, int compatible)
 282{
 283        size_t from_length;
 284
 285        from_length = strlen(from);
 286        strncpy(to, from, min(to_length, from_length));
 287        if (from_length < to_length) {
 288                if (compatible) {
 289                        /*
 290                         * NUL terminate the string if it is short.
 291                         */
 292                        to[from_length] = '\0';
 293                } else {
 294                        /* 
 295                         * space pad the string if it is short. 
 296                         */
 297                        strncpy(&to[from_length], spaces,
 298                                to_length - from_length);
 299                }
 300        }
 301        if (from_length > to_length)
 302                 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 303                        __func__, name, from);
 304}
 305
 306/**
 307 * scsi_dev_info_list_add - add one dev_info list entry.
 308 * @compatible: if true, null terminate short strings.  Otherwise space pad.
 309 * @vendor:     vendor string
 310 * @model:      model (product) string
 311 * @strflags:   integer string
 312 * @flags:      if strflags NULL, use this flag value
 313 *
 314 * Description:
 315 *      Create and add one dev_info entry for @vendor, @model, @strflags or
 316 *      @flag. If @compatible, add to the tail of the list, do not space
 317 *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 318 *      are added with @compatible 1 and @clfags NULL.
 319 *
 320 * Returns: 0 OK, -error on failure.
 321 **/
 322static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 323                            char *strflags, int flags)
 324{
 325        return scsi_dev_info_list_add_keyed(compatible, vendor, model,
 326                                            strflags, flags,
 327                                            SCSI_DEVINFO_GLOBAL);
 328}
 329
 330/**
 331 * scsi_dev_info_list_add_keyed - add one dev_info list entry.
 332 * @compatible: if true, null terminate short strings.  Otherwise space pad.
 333 * @vendor:     vendor string
 334 * @model:      model (product) string
 335 * @strflags:   integer string
 336 * @flags:      if strflags NULL, use this flag value
 337 * @key:        specify list to use
 338 *
 339 * Description:
 340 *      Create and add one dev_info entry for @vendor, @model,
 341 *      @strflags or @flag in list specified by @key. If @compatible,
 342 *      add to the tail of the list, do not space pad, and set
 343 *      devinfo->compatible. The scsi_static_device_list entries are
 344 *      added with @compatible 1 and @clfags NULL.
 345 *
 346 * Returns: 0 OK, -error on failure.
 347 **/
 348int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
 349                                 char *strflags, int flags, int key)
 350{
 351        struct scsi_dev_info_list *devinfo;
 352        struct scsi_dev_info_list_table *devinfo_table =
 353                scsi_devinfo_lookup_by_key(key);
 354
 355        if (IS_ERR(devinfo_table))
 356                return PTR_ERR(devinfo_table);
 357
 358        devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 359        if (!devinfo) {
 360                printk(KERN_ERR "%s: no memory\n", __func__);
 361                return -ENOMEM;
 362        }
 363
 364        scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 365                            vendor, compatible);
 366        scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 367                            model, compatible);
 368
 369        if (strflags)
 370                devinfo->flags = simple_strtoul(strflags, NULL, 0);
 371        else
 372                devinfo->flags = flags;
 373
 374        devinfo->compatible = compatible;
 375
 376        if (compatible)
 377                list_add_tail(&devinfo->dev_info_list,
 378                              &devinfo_table->scsi_dev_info_list);
 379        else
 380                list_add(&devinfo->dev_info_list,
 381                         &devinfo_table->scsi_dev_info_list);
 382
 383        return 0;
 384}
 385EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
 386
 387/**
 388 * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
 389 * @vendor:     vendor string
 390 * @model:      model (product) string
 391 * @key:        specify list to use
 392 *
 393 * Description:
 394 *      Remove and destroy one dev_info entry for @vendor, @model
 395 *      in list specified by @key.
 396 *
 397 * Returns: 0 OK, -error on failure.
 398 **/
 399int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key)
 400{
 401        struct scsi_dev_info_list *devinfo, *found = NULL;
 402        struct scsi_dev_info_list_table *devinfo_table =
 403                scsi_devinfo_lookup_by_key(key);
 404
 405        if (IS_ERR(devinfo_table))
 406                return PTR_ERR(devinfo_table);
 407
 408        list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 409                            dev_info_list) {
 410                if (devinfo->compatible) {
 411                        /*
 412                         * Behave like the older version of get_device_flags.
 413                         */
 414                        size_t max;
 415                        /*
 416                         * XXX why skip leading spaces? If an odd INQUIRY
 417                         * value, that should have been part of the
 418                         * scsi_static_device_list[] entry, such as "  FOO"
 419                         * rather than "FOO". Since this code is already
 420                         * here, and we don't know what device it is
 421                         * trying to work with, leave it as-is.
 422                         */
 423                        max = 8;        /* max length of vendor */
 424                        while ((max > 0) && *vendor == ' ') {
 425                                max--;
 426                                vendor++;
 427                        }
 428                        /*
 429                         * XXX removing the following strlen() would be
 430                         * good, using it means that for a an entry not in
 431                         * the list, we scan every byte of every vendor
 432                         * listed in scsi_static_device_list[], and never match
 433                         * a single one (and still have to compare at
 434                         * least the first byte of each vendor).
 435                         */
 436                        if (memcmp(devinfo->vendor, vendor,
 437                                    min(max, strlen(devinfo->vendor))))
 438                                continue;
 439                        /*
 440                         * Skip spaces again.
 441                         */
 442                        max = 16;       /* max length of model */
 443                        while ((max > 0) && *model == ' ') {
 444                                max--;
 445                                model++;
 446                        }
 447                        if (memcmp(devinfo->model, model,
 448                                   min(max, strlen(devinfo->model))))
 449                                continue;
 450                        found = devinfo;
 451                } else {
 452                        if (!memcmp(devinfo->vendor, vendor,
 453                                     sizeof(devinfo->vendor)) &&
 454                             !memcmp(devinfo->model, model,
 455                                      sizeof(devinfo->model)))
 456                                found = devinfo;
 457                }
 458                if (found)
 459                        break;
 460        }
 461
 462        if (found) {
 463                list_del(&found->dev_info_list);
 464                kfree(found);
 465                return 0;
 466        }
 467
 468        return -ENOENT;
 469}
 470EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
 471
 472/**
 473 * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 474 * @dev_list:   string of device flags to add
 475 *
 476 * Description:
 477 *      Parse dev_list, and add entries to the scsi_dev_info_list.
 478 *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 479 *      dev_list is modified via strsep. Can be called for command line
 480 *      addition, for proc or mabye a sysfs interface.
 481 *
 482 * Returns: 0 if OK, -error on failure.
 483 **/
 484static int scsi_dev_info_list_add_str(char *dev_list)
 485{
 486        char *vendor, *model, *strflags, *next;
 487        char *next_check;
 488        int res = 0;
 489
 490        next = dev_list;
 491        if (next && next[0] == '"') {
 492                /*
 493                 * Ignore both the leading and trailing quote.
 494                 */
 495                next++;
 496                next_check = ",\"";
 497        } else {
 498                next_check = ",";
 499        }
 500
 501        /*
 502         * For the leading and trailing '"' case, the for loop comes
 503         * through the last time with vendor[0] == '\0'.
 504         */
 505        for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 506             && (res == 0); vendor = strsep(&next, ":")) {
 507                strflags = NULL;
 508                model = strsep(&next, ":");
 509                if (model)
 510                        strflags = strsep(&next, next_check);
 511                if (!model || !strflags) {
 512                        printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 513                               " '%s'\n", __func__, vendor, model,
 514                               strflags);
 515                        res = -EINVAL;
 516                } else
 517                        res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 518                                                     model, strflags, 0);
 519        }
 520        return res;
 521}
 522
 523/**
 524 * get_device_flags - get device specific flags from the dynamic device list.
 525 * @sdev:       &scsi_device to get flags for
 526 * @vendor:     vendor name
 527 * @model:      model name
 528 *
 529 * Description:
 530 *     Search the global scsi_dev_info_list (specified by list zero)
 531 *     for an entry matching @vendor and @model, if found, return the
 532 *     matching flags value, else return the host or global default
 533 *     settings.  Called during scan time.
 534 **/
 535int scsi_get_device_flags(struct scsi_device *sdev,
 536                          const unsigned char *vendor,
 537                          const unsigned char *model)
 538{
 539        return scsi_get_device_flags_keyed(sdev, vendor, model,
 540                                           SCSI_DEVINFO_GLOBAL);
 541}
 542
 543
 544/**
 545 * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
 546 * @sdev:       &scsi_device to get flags for
 547 * @vendor:     vendor name
 548 * @model:      model name
 549 * @key:        list to look up
 550 *
 551 * Description:
 552 *     Search the scsi_dev_info_list specified by @key for an entry
 553 *     matching @vendor and @model, if found, return the matching
 554 *     flags value, else return the host or global default settings.
 555 *     Called during scan time.
 556 **/
 557int scsi_get_device_flags_keyed(struct scsi_device *sdev,
 558                                const unsigned char *vendor,
 559                                const unsigned char *model,
 560                                int key)
 561{
 562        struct scsi_dev_info_list *devinfo;
 563        struct scsi_dev_info_list_table *devinfo_table;
 564
 565        devinfo_table = scsi_devinfo_lookup_by_key(key);
 566
 567        if (IS_ERR(devinfo_table))
 568                return PTR_ERR(devinfo_table);
 569
 570        list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 571                            dev_info_list) {
 572                if (devinfo->compatible) {
 573                        /*
 574                         * Behave like the older version of get_device_flags.
 575                         */
 576                        size_t max;
 577                        /*
 578                         * XXX why skip leading spaces? If an odd INQUIRY
 579                         * value, that should have been part of the
 580                         * scsi_static_device_list[] entry, such as "  FOO"
 581                         * rather than "FOO". Since this code is already
 582                         * here, and we don't know what device it is
 583                         * trying to work with, leave it as-is.
 584                         */
 585                        max = 8;        /* max length of vendor */
 586                        while ((max > 0) && *vendor == ' ') {
 587                                max--;
 588                                vendor++;
 589                        }
 590                        /*
 591                         * XXX removing the following strlen() would be
 592                         * good, using it means that for a an entry not in
 593                         * the list, we scan every byte of every vendor
 594                         * listed in scsi_static_device_list[], and never match
 595                         * a single one (and still have to compare at
 596                         * least the first byte of each vendor).
 597                         */
 598                        if (memcmp(devinfo->vendor, vendor,
 599                                    min(max, strlen(devinfo->vendor))))
 600                                continue;
 601                        /*
 602                         * Skip spaces again.
 603                         */
 604                        max = 16;       /* max length of model */
 605                        while ((max > 0) && *model == ' ') {
 606                                max--;
 607                                model++;
 608                        }
 609                        if (memcmp(devinfo->model, model,
 610                                   min(max, strlen(devinfo->model))))
 611                                continue;
 612                        return devinfo->flags;
 613                } else {
 614                        if (!memcmp(devinfo->vendor, vendor,
 615                                     sizeof(devinfo->vendor)) &&
 616                             !memcmp(devinfo->model, model,
 617                                      sizeof(devinfo->model)))
 618                                return devinfo->flags;
 619                }
 620        }
 621        /* nothing found, return nothing */
 622        if (key != SCSI_DEVINFO_GLOBAL)
 623                return 0;
 624
 625        /* except for the global list, where we have an exception */
 626        if (sdev->sdev_bflags)
 627                return sdev->sdev_bflags;
 628
 629        return scsi_default_dev_flags;
 630}
 631EXPORT_SYMBOL(scsi_get_device_flags_keyed);
 632
 633#ifdef CONFIG_SCSI_PROC_FS
 634struct double_list {
 635        struct list_head *top;
 636        struct list_head *bottom;
 637};
 638
 639static int devinfo_seq_show(struct seq_file *m, void *v)
 640{
 641        struct double_list *dl = v;
 642        struct scsi_dev_info_list_table *devinfo_table =
 643                list_entry(dl->top, struct scsi_dev_info_list_table, node);
 644        struct scsi_dev_info_list *devinfo =
 645                list_entry(dl->bottom, struct scsi_dev_info_list,
 646                           dev_info_list);
 647
 648        if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
 649            devinfo_table->name)
 650                seq_printf(m, "[%s]:\n", devinfo_table->name);
 651
 652        seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
 653                   devinfo->vendor, devinfo->model, devinfo->flags);
 654        return 0;
 655}
 656
 657static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
 658{
 659        struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
 660        loff_t pos = *ppos;
 661
 662        if (!dl)
 663                return NULL;
 664
 665        list_for_each(dl->top, &scsi_dev_info_list) {
 666                struct scsi_dev_info_list_table *devinfo_table =
 667                        list_entry(dl->top, struct scsi_dev_info_list_table,
 668                                   node);
 669                list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
 670                        if (pos-- == 0)
 671                                return dl;
 672        }
 673
 674        kfree(dl);
 675        return NULL;
 676}
 677
 678static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
 679{
 680        struct double_list *dl = v;
 681        struct scsi_dev_info_list_table *devinfo_table =
 682                list_entry(dl->top, struct scsi_dev_info_list_table, node);
 683
 684        ++*ppos;
 685        dl->bottom = dl->bottom->next;
 686        while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
 687                dl->top = dl->top->next;
 688                if (dl->top == &scsi_dev_info_list) {
 689                        kfree(dl);
 690                        return NULL;
 691                }
 692                devinfo_table = list_entry(dl->top,
 693                                           struct scsi_dev_info_list_table,
 694                                           node);
 695                dl->bottom = devinfo_table->scsi_dev_info_list.next;
 696        }
 697
 698        return dl;
 699}
 700
 701static void devinfo_seq_stop(struct seq_file *m, void *v)
 702{
 703        kfree(v);
 704}
 705
 706static const struct seq_operations scsi_devinfo_seq_ops = {
 707        .start  = devinfo_seq_start,
 708        .next   = devinfo_seq_next,
 709        .stop   = devinfo_seq_stop,
 710        .show   = devinfo_seq_show,
 711};
 712
 713static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 714{
 715        return seq_open(file, &scsi_devinfo_seq_ops);
 716}
 717
 718/* 
 719 * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 720 *
 721 * Description: Adds a black/white list entry for vendor and model with an
 722 * integer value of flag to the scsi device info list.
 723 * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 724 */
 725static ssize_t proc_scsi_devinfo_write(struct file *file,
 726                                       const char __user *buf,
 727                                       size_t length, loff_t *ppos)
 728{
 729        char *buffer;
 730        ssize_t err = length;
 731
 732        if (!buf || length>PAGE_SIZE)
 733                return -EINVAL;
 734        if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 735                return -ENOMEM;
 736        if (copy_from_user(buffer, buf, length)) {
 737                err =-EFAULT;
 738                goto out;
 739        }
 740
 741        if (length < PAGE_SIZE)
 742                buffer[length] = '\0';
 743        else if (buffer[PAGE_SIZE-1]) {
 744                err = -EINVAL;
 745                goto out;
 746        }
 747
 748        scsi_dev_info_list_add_str(buffer);
 749
 750out:
 751        free_page((unsigned long)buffer);
 752        return err;
 753}
 754
 755static const struct file_operations scsi_devinfo_proc_fops = {
 756        .owner          = THIS_MODULE,
 757        .open           = proc_scsi_devinfo_open,
 758        .read           = seq_read,
 759        .write          = proc_scsi_devinfo_write,
 760        .llseek         = seq_lseek,
 761        .release        = seq_release,
 762};
 763#endif /* CONFIG_SCSI_PROC_FS */
 764
 765module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 766MODULE_PARM_DESC(dev_flags,
 767         "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 768         " list entries for vendor and model with an integer value of flags"
 769         " to the scsi device info list");
 770
 771module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 772MODULE_PARM_DESC(default_dev_flags,
 773                 "scsi default device flag integer value");
 774
 775/**
 776 * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 777 **/
 778void scsi_exit_devinfo(void)
 779{
 780#ifdef CONFIG_SCSI_PROC_FS
 781        remove_proc_entry("scsi/device_info", NULL);
 782#endif
 783
 784        scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 785}
 786
 787/**
 788 * scsi_dev_info_add_list - add a new devinfo list
 789 * @key:        key of the list to add
 790 * @name:       Name of the list to add (for /proc/scsi/device_info)
 791 *
 792 * Adds the requested list, returns zero on success, -EEXIST if the
 793 * key is already registered to a list, or other error on failure.
 794 */
 795int scsi_dev_info_add_list(int key, const char *name)
 796{
 797        struct scsi_dev_info_list_table *devinfo_table =
 798                scsi_devinfo_lookup_by_key(key);
 799
 800        if (!IS_ERR(devinfo_table))
 801                /* list already exists */
 802                return -EEXIST;
 803
 804        devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 805
 806        if (!devinfo_table)
 807                return -ENOMEM;
 808
 809        INIT_LIST_HEAD(&devinfo_table->node);
 810        INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 811        devinfo_table->name = name;
 812        devinfo_table->key = key;
 813        list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 814
 815        return 0;
 816}
 817EXPORT_SYMBOL(scsi_dev_info_add_list);
 818
 819/**
 820 * scsi_dev_info_remove_list - destroy an added devinfo list
 821 * @key: key of the list to destroy
 822 *
 823 * Iterates over the entire list first, freeing all the values, then
 824 * frees the list itself.  Returns 0 on success or -EINVAL if the key
 825 * can't be found.
 826 */
 827int scsi_dev_info_remove_list(int key)
 828{
 829        struct list_head *lh, *lh_next;
 830        struct scsi_dev_info_list_table *devinfo_table =
 831                scsi_devinfo_lookup_by_key(key);
 832
 833        if (IS_ERR(devinfo_table))
 834                /* no such list */
 835                return -EINVAL;
 836
 837        /* remove from the master list */
 838        list_del(&devinfo_table->node);
 839
 840        list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 841                struct scsi_dev_info_list *devinfo;
 842
 843                devinfo = list_entry(lh, struct scsi_dev_info_list,
 844                                     dev_info_list);
 845                kfree(devinfo);
 846        }
 847        kfree(devinfo_table);
 848
 849        return 0;
 850}
 851EXPORT_SYMBOL(scsi_dev_info_remove_list);
 852
 853/**
 854 * scsi_init_devinfo - set up the dynamic device list.
 855 *
 856 * Description:
 857 *      Add command line entries from scsi_dev_flags, then add
 858 *      scsi_static_device_list entries to the scsi device info list.
 859 */
 860int __init scsi_init_devinfo(void)
 861{
 862#ifdef CONFIG_SCSI_PROC_FS
 863        struct proc_dir_entry *p;
 864#endif
 865        int error, i;
 866
 867        error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 868        if (error)
 869                return error;
 870
 871        error = scsi_dev_info_list_add_str(scsi_dev_flags);
 872        if (error)
 873                goto out;
 874
 875        for (i = 0; scsi_static_device_list[i].vendor; i++) {
 876                error = scsi_dev_info_list_add(1 /* compatibile */,
 877                                scsi_static_device_list[i].vendor,
 878                                scsi_static_device_list[i].model,
 879                                NULL,
 880                                scsi_static_device_list[i].flags);
 881                if (error)
 882                        goto out;
 883        }
 884
 885#ifdef CONFIG_SCSI_PROC_FS
 886        p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
 887        if (!p) {
 888                error = -ENOMEM;
 889                goto out;
 890        }
 891#endif /* CONFIG_SCSI_PROC_FS */
 892
 893 out:
 894        if (error)
 895                scsi_exit_devinfo();
 896        return error;
 897}
 898
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