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", "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        {"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
 206        {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 207        {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 208        {"Marvell", "Console", NULL, BLIST_SKIP_VPD_PAGES},
 209        {"Marvell", "91xx Config", "1.01", BLIST_SKIP_VPD_PAGES},
 210        {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 211        {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 212        {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 213        {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 214        {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 215        {"MICROP", "4110", NULL, BLIST_NOTQ},
 216        {"MSFT", "Virtual HD", NULL, BLIST_NO_RSOC},
 217        {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 218        {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 219        {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 220        {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 221        {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 222        {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 223        {"NETAPP", "LUN C-Mode", NULL, BLIST_SYNC_ALUA},
 224        {"NETAPP", "INF-01-00", NULL, BLIST_SYNC_ALUA},
 225        {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 226        {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 227        {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 228        {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 229        {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 230        {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 231        {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
 232        {"Promise", "", NULL, BLIST_SPARSELUN},
 233        {"QEMU", "QEMU CD-ROM", NULL, BLIST_SKIP_VPD_PAGES},
 234        {"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
 235        {"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
 236        {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 237        {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 238        {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 239        {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 240        {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 241        {"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
 242        {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 243        {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 244        {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 245        {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 246        {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 247        {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 248        {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 249        {"STK", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 250        {"NETAPP", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 251        {"LSI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 252        {"ENGENIO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 253        {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 254        {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 255        {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 256        {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 257        {"SUN", "T300", "*", BLIST_SPARSELUN},
 258        {"SUN", "T4", "*", BLIST_SPARSELUN},
 259        {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
 260        {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 261        {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 262        {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 263        {"Traxdata", "CDR4120", NULL, BLIST_NOLUN},     /* locks up */
 264        {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 265        {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 266        {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 267        {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 268        {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 269        {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 270        {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 271        {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 272        { NULL, NULL, NULL, 0 },
 273};
 274
 275static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
 276{
 277        struct scsi_dev_info_list_table *devinfo_table;
 278        int found = 0;
 279
 280        list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
 281                if (devinfo_table->key == key) {
 282                        found = 1;
 283                        break;
 284                }
 285        if (!found)
 286                return ERR_PTR(-EINVAL);
 287
 288        return devinfo_table;
 289}
 290
 291/*
 292 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 293 * devinfo vendor and model strings.
 294 */
 295static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 296                                char *from, int compatible)
 297{
 298        size_t from_length;
 299
 300        from_length = strlen(from);
 301        strncpy(to, from, min(to_length, from_length));
 302        if (from_length < to_length) {
 303                if (compatible) {
 304                        /*
 305                         * NUL terminate the string if it is short.
 306                         */
 307                        to[from_length] = '\0';
 308                } else {
 309                        /* 
 310                         * space pad the string if it is short. 
 311                         */
 312                        strncpy(&to[from_length], spaces,
 313                                to_length - from_length);
 314                }
 315        }
 316        if (from_length > to_length)
 317                 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 318                        __func__, name, from);
 319}
 320
 321/**
 322 * scsi_dev_info_list_add - add one dev_info list entry.
 323 * @compatible: if true, null terminate short strings.  Otherwise space pad.
 324 * @vendor:     vendor string
 325 * @model:      model (product) string
 326 * @strflags:   integer string
 327 * @flags:      if strflags NULL, use this flag value
 328 *
 329 * Description:
 330 *      Create and add one dev_info entry for @vendor, @model, @strflags or
 331 *      @flag. If @compatible, add to the tail of the list, do not space
 332 *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 333 *      are added with @compatible 1 and @clfags NULL.
 334 *
 335 * Returns: 0 OK, -error on failure.
 336 **/
 337static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 338                            char *strflags, int flags)
 339{
 340        return scsi_dev_info_list_add_keyed(compatible, vendor, model,
 341                                            strflags, flags,
 342                                            SCSI_DEVINFO_GLOBAL);
 343}
 344
 345/**
 346 * scsi_dev_info_list_add_keyed - add one dev_info list entry.
 347 * @compatible: if true, null terminate short strings.  Otherwise space pad.
 348 * @vendor:     vendor string
 349 * @model:      model (product) string
 350 * @strflags:   integer string
 351 * @flags:      if strflags NULL, use this flag value
 352 * @key:        specify list to use
 353 *
 354 * Description:
 355 *      Create and add one dev_info entry for @vendor, @model,
 356 *      @strflags or @flag in list specified by @key. If @compatible,
 357 *      add to the tail of the list, do not space pad, and set
 358 *      devinfo->compatible. The scsi_static_device_list entries are
 359 *      added with @compatible 1 and @clfags NULL.
 360 *
 361 * Returns: 0 OK, -error on failure.
 362 **/
 363int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
 364                                 char *strflags, int flags, int key)
 365{
 366        struct scsi_dev_info_list *devinfo;
 367        struct scsi_dev_info_list_table *devinfo_table =
 368                scsi_devinfo_lookup_by_key(key);
 369
 370        if (IS_ERR(devinfo_table))
 371                return PTR_ERR(devinfo_table);
 372
 373        devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 374        if (!devinfo) {
 375                printk(KERN_ERR "%s: no memory\n", __func__);
 376                return -ENOMEM;
 377        }
 378
 379        scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 380                            vendor, compatible);
 381        scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 382                            model, compatible);
 383
 384        if (strflags)
 385                devinfo->flags = simple_strtoul(strflags, NULL, 0);
 386        else
 387                devinfo->flags = flags;
 388
 389        devinfo->compatible = compatible;
 390
 391        if (compatible)
 392                list_add_tail(&devinfo->dev_info_list,
 393                              &devinfo_table->scsi_dev_info_list);
 394        else
 395                list_add(&devinfo->dev_info_list,
 396                         &devinfo_table->scsi_dev_info_list);
 397
 398        return 0;
 399}
 400EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
 401
 402/**
 403 * scsi_dev_info_list_find - find a matching dev_info list entry.
 404 * @vendor:     vendor string
 405 * @model:      model (product) string
 406 * @key:        specify list to use
 407 *
 408 * Description:
 409 *      Finds the first dev_info entry matching @vendor, @model
 410 *      in list specified by @key.
 411 *
 412 * Returns: pointer to matching entry, or ERR_PTR on failure.
 413 **/
 414static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
 415                const char *model, int key)
 416{
 417        struct scsi_dev_info_list *devinfo;
 418        struct scsi_dev_info_list_table *devinfo_table =
 419                scsi_devinfo_lookup_by_key(key);
 420        size_t vmax, mmax;
 421        const char *vskip, *mskip;
 422
 423        if (IS_ERR(devinfo_table))
 424                return (struct scsi_dev_info_list *) devinfo_table;
 425
 426        /* Prepare for "compatible" matches */
 427
 428        /*
 429         * XXX why skip leading spaces? If an odd INQUIRY
 430         * value, that should have been part of the
 431         * scsi_static_device_list[] entry, such as "  FOO"
 432         * rather than "FOO". Since this code is already
 433         * here, and we don't know what device it is
 434         * trying to work with, leave it as-is.
 435         */
 436        vmax = sizeof(devinfo->vendor);
 437        vskip = vendor;
 438        while (vmax > 0 && *vskip == ' ') {
 439                vmax--;
 440                vskip++;
 441        }
 442        /* Also skip trailing spaces */
 443        while (vmax > 0 && vskip[vmax - 1] == ' ')
 444                --vmax;
 445
 446        mmax = sizeof(devinfo->model);
 447        mskip = model;
 448        while (mmax > 0 && *mskip == ' ') {
 449                mmax--;
 450                mskip++;
 451        }
 452        while (mmax > 0 && mskip[mmax - 1] == ' ')
 453                --mmax;
 454
 455        list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 456                            dev_info_list) {
 457                if (devinfo->compatible) {
 458                        /*
 459                         * Behave like the older version of get_device_flags.
 460                         */
 461                        if (memcmp(devinfo->vendor, vskip, vmax) ||
 462                                        (vmax < sizeof(devinfo->vendor) &&
 463                                                devinfo->vendor[vmax]))
 464                                continue;
 465                        if (memcmp(devinfo->model, mskip, mmax) ||
 466                                        (mmax < sizeof(devinfo->model) &&
 467                                                devinfo->model[mmax]))
 468                                continue;
 469                        return devinfo;
 470                } else {
 471                        if (!memcmp(devinfo->vendor, vendor,
 472                                     sizeof(devinfo->vendor)) &&
 473                             !memcmp(devinfo->model, model,
 474                                      sizeof(devinfo->model)))
 475                                return devinfo;
 476                }
 477        }
 478
 479        return ERR_PTR(-ENOENT);
 480}
 481
 482/**
 483 * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
 484 * @vendor:     vendor string
 485 * @model:      model (product) string
 486 * @key:        specify list to use
 487 *
 488 * Description:
 489 *      Remove and destroy one dev_info entry for @vendor, @model
 490 *      in list specified by @key.
 491 *
 492 * Returns: 0 OK, -error on failure.
 493 **/
 494int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key)
 495{
 496        struct scsi_dev_info_list *found;
 497
 498        found = scsi_dev_info_list_find(vendor, model, key);
 499        if (IS_ERR(found))
 500                return PTR_ERR(found);
 501
 502        list_del(&found->dev_info_list);
 503        kfree(found);
 504        return 0;
 505}
 506EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
 507
 508/**
 509 * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 510 * @dev_list:   string of device flags to add
 511 *
 512 * Description:
 513 *      Parse dev_list, and add entries to the scsi_dev_info_list.
 514 *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 515 *      dev_list is modified via strsep. Can be called for command line
 516 *      addition, for proc or mabye a sysfs interface.
 517 *
 518 * Returns: 0 if OK, -error on failure.
 519 **/
 520static int scsi_dev_info_list_add_str(char *dev_list)
 521{
 522        char *vendor, *model, *strflags, *next;
 523        char *next_check;
 524        int res = 0;
 525
 526        next = dev_list;
 527        if (next && next[0] == '"') {
 528                /*
 529                 * Ignore both the leading and trailing quote.
 530                 */
 531                next++;
 532                next_check = ",\"";
 533        } else {
 534                next_check = ",";
 535        }
 536
 537        /*
 538         * For the leading and trailing '"' case, the for loop comes
 539         * through the last time with vendor[0] == '\0'.
 540         */
 541        for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 542             && (res == 0); vendor = strsep(&next, ":")) {
 543                strflags = NULL;
 544                model = strsep(&next, ":");
 545                if (model)
 546                        strflags = strsep(&next, next_check);
 547                if (!model || !strflags) {
 548                        printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 549                               " '%s'\n", __func__, vendor, model,
 550                               strflags);
 551                        res = -EINVAL;
 552                } else
 553                        res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 554                                                     model, strflags, 0);
 555        }
 556        return res;
 557}
 558
 559/**
 560 * get_device_flags - get device specific flags from the dynamic device list.
 561 * @sdev:       &scsi_device to get flags for
 562 * @vendor:     vendor name
 563 * @model:      model name
 564 *
 565 * Description:
 566 *     Search the global scsi_dev_info_list (specified by list zero)
 567 *     for an entry matching @vendor and @model, if found, return the
 568 *     matching flags value, else return the host or global default
 569 *     settings.  Called during scan time.
 570 **/
 571int scsi_get_device_flags(struct scsi_device *sdev,
 572                          const unsigned char *vendor,
 573                          const unsigned char *model)
 574{
 575        return scsi_get_device_flags_keyed(sdev, vendor, model,
 576                                           SCSI_DEVINFO_GLOBAL);
 577}
 578
 579
 580/**
 581 * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
 582 * @sdev:       &scsi_device to get flags for
 583 * @vendor:     vendor name
 584 * @model:      model name
 585 * @key:        list to look up
 586 *
 587 * Description:
 588 *     Search the scsi_dev_info_list specified by @key for an entry
 589 *     matching @vendor and @model, if found, return the matching
 590 *     flags value, else return the host or global default settings.
 591 *     Called during scan time.
 592 **/
 593int scsi_get_device_flags_keyed(struct scsi_device *sdev,
 594                                const unsigned char *vendor,
 595                                const unsigned char *model,
 596                                int key)
 597{
 598        struct scsi_dev_info_list *devinfo;
 599        int err;
 600
 601        devinfo = scsi_dev_info_list_find(vendor, model, key);
 602        if (!IS_ERR(devinfo))
 603                return devinfo->flags;
 604
 605        err = PTR_ERR(devinfo);
 606        if (err != -ENOENT)
 607                return err;
 608
 609        /* nothing found, return nothing */
 610        if (key != SCSI_DEVINFO_GLOBAL)
 611                return 0;
 612
 613        /* except for the global list, where we have an exception */
 614        if (sdev->sdev_bflags)
 615                return sdev->sdev_bflags;
 616
 617        return scsi_default_dev_flags;
 618}
 619EXPORT_SYMBOL(scsi_get_device_flags_keyed);
 620
 621#ifdef CONFIG_SCSI_PROC_FS
 622struct double_list {
 623        struct list_head *top;
 624        struct list_head *bottom;
 625};
 626
 627static int devinfo_seq_show(struct seq_file *m, void *v)
 628{
 629        struct double_list *dl = v;
 630        struct scsi_dev_info_list_table *devinfo_table =
 631                list_entry(dl->top, struct scsi_dev_info_list_table, node);
 632        struct scsi_dev_info_list *devinfo =
 633                list_entry(dl->bottom, struct scsi_dev_info_list,
 634                           dev_info_list);
 635
 636        if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
 637            devinfo_table->name)
 638                seq_printf(m, "[%s]:\n", devinfo_table->name);
 639
 640        seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
 641                   devinfo->vendor, devinfo->model, devinfo->flags);
 642        return 0;
 643}
 644
 645static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
 646{
 647        struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
 648        loff_t pos = *ppos;
 649
 650        if (!dl)
 651                return NULL;
 652
 653        list_for_each(dl->top, &scsi_dev_info_list) {
 654                struct scsi_dev_info_list_table *devinfo_table =
 655                        list_entry(dl->top, struct scsi_dev_info_list_table,
 656                                   node);
 657                list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
 658                        if (pos-- == 0)
 659                                return dl;
 660        }
 661
 662        kfree(dl);
 663        return NULL;
 664}
 665
 666static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
 667{
 668        struct double_list *dl = v;
 669        struct scsi_dev_info_list_table *devinfo_table =
 670                list_entry(dl->top, struct scsi_dev_info_list_table, node);
 671
 672        ++*ppos;
 673        dl->bottom = dl->bottom->next;
 674        while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
 675                dl->top = dl->top->next;
 676                if (dl->top == &scsi_dev_info_list) {
 677                        kfree(dl);
 678                        return NULL;
 679                }
 680                devinfo_table = list_entry(dl->top,
 681                                           struct scsi_dev_info_list_table,
 682                                           node);
 683                dl->bottom = devinfo_table->scsi_dev_info_list.next;
 684        }
 685
 686        return dl;
 687}
 688
 689static void devinfo_seq_stop(struct seq_file *m, void *v)
 690{
 691        kfree(v);
 692}
 693
 694static const struct seq_operations scsi_devinfo_seq_ops = {
 695        .start  = devinfo_seq_start,
 696        .next   = devinfo_seq_next,
 697        .stop   = devinfo_seq_stop,
 698        .show   = devinfo_seq_show,
 699};
 700
 701static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 702{
 703        return seq_open(file, &scsi_devinfo_seq_ops);
 704}
 705
 706/* 
 707 * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 708 *
 709 * Description: Adds a black/white list entry for vendor and model with an
 710 * integer value of flag to the scsi device info list.
 711 * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 712 */
 713static ssize_t proc_scsi_devinfo_write(struct file *file,
 714                                       const char __user *buf,
 715                                       size_t length, loff_t *ppos)
 716{
 717        char *buffer;
 718        ssize_t err = length;
 719
 720        if (!buf || length>PAGE_SIZE)
 721                return -EINVAL;
 722        if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 723                return -ENOMEM;
 724        if (copy_from_user(buffer, buf, length)) {
 725                err =-EFAULT;
 726                goto out;
 727        }
 728
 729        if (length < PAGE_SIZE)
 730                buffer[length] = '\0';
 731        else if (buffer[PAGE_SIZE-1]) {
 732                err = -EINVAL;
 733                goto out;
 734        }
 735
 736        scsi_dev_info_list_add_str(buffer);
 737
 738out:
 739        free_page((unsigned long)buffer);
 740        return err;
 741}
 742
 743static const struct file_operations scsi_devinfo_proc_fops = {
 744        .owner          = THIS_MODULE,
 745        .open           = proc_scsi_devinfo_open,
 746        .read           = seq_read,
 747        .write          = proc_scsi_devinfo_write,
 748        .llseek         = seq_lseek,
 749        .release        = seq_release,
 750};
 751#endif /* CONFIG_SCSI_PROC_FS */
 752
 753module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 754MODULE_PARM_DESC(dev_flags,
 755         "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 756         " list entries for vendor and model with an integer value of flags"
 757         " to the scsi device info list");
 758
 759module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 760MODULE_PARM_DESC(default_dev_flags,
 761                 "scsi default device flag integer value");
 762
 763/**
 764 * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 765 **/
 766void scsi_exit_devinfo(void)
 767{
 768#ifdef CONFIG_SCSI_PROC_FS
 769        remove_proc_entry("scsi/device_info", NULL);
 770#endif
 771
 772        scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 773}
 774
 775/**
 776 * scsi_dev_info_add_list - add a new devinfo list
 777 * @key:        key of the list to add
 778 * @name:       Name of the list to add (for /proc/scsi/device_info)
 779 *
 780 * Adds the requested list, returns zero on success, -EEXIST if the
 781 * key is already registered to a list, or other error on failure.
 782 */
 783int scsi_dev_info_add_list(int key, const char *name)
 784{
 785        struct scsi_dev_info_list_table *devinfo_table =
 786                scsi_devinfo_lookup_by_key(key);
 787
 788        if (!IS_ERR(devinfo_table))
 789                /* list already exists */
 790                return -EEXIST;
 791
 792        devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 793
 794        if (!devinfo_table)
 795                return -ENOMEM;
 796
 797        INIT_LIST_HEAD(&devinfo_table->node);
 798        INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 799        devinfo_table->name = name;
 800        devinfo_table->key = key;
 801        list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 802
 803        return 0;
 804}
 805EXPORT_SYMBOL(scsi_dev_info_add_list);
 806
 807/**
 808 * scsi_dev_info_remove_list - destroy an added devinfo list
 809 * @key: key of the list to destroy
 810 *
 811 * Iterates over the entire list first, freeing all the values, then
 812 * frees the list itself.  Returns 0 on success or -EINVAL if the key
 813 * can't be found.
 814 */
 815int scsi_dev_info_remove_list(int key)
 816{
 817        struct list_head *lh, *lh_next;
 818        struct scsi_dev_info_list_table *devinfo_table =
 819                scsi_devinfo_lookup_by_key(key);
 820
 821        if (IS_ERR(devinfo_table))
 822                /* no such list */
 823                return -EINVAL;
 824
 825        /* remove from the master list */
 826        list_del(&devinfo_table->node);
 827
 828        list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 829                struct scsi_dev_info_list *devinfo;
 830
 831                devinfo = list_entry(lh, struct scsi_dev_info_list,
 832                                     dev_info_list);
 833                kfree(devinfo);
 834        }
 835        kfree(devinfo_table);
 836
 837        return 0;
 838}
 839EXPORT_SYMBOL(scsi_dev_info_remove_list);
 840
 841/**
 842 * scsi_init_devinfo - set up the dynamic device list.
 843 *
 844 * Description:
 845 *      Add command line entries from scsi_dev_flags, then add
 846 *      scsi_static_device_list entries to the scsi device info list.
 847 */
 848int __init scsi_init_devinfo(void)
 849{
 850#ifdef CONFIG_SCSI_PROC_FS
 851        struct proc_dir_entry *p;
 852#endif
 853        int error, i;
 854
 855        error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 856        if (error)
 857                return error;
 858
 859        error = scsi_dev_info_list_add_str(scsi_dev_flags);
 860        if (error)
 861                goto out;
 862
 863        for (i = 0; scsi_static_device_list[i].vendor; i++) {
 864                error = scsi_dev_info_list_add(1 /* compatibile */,
 865                                scsi_static_device_list[i].vendor,
 866                                scsi_static_device_list[i].model,
 867                                NULL,
 868                                scsi_static_device_list[i].flags);
 869                if (error)
 870                        goto out;
 871        }
 872
 873#ifdef CONFIG_SCSI_PROC_FS
 874        p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
 875        if (!p) {
 876                error = -ENOMEM;
 877                goto out;
 878        }
 879#endif /* CONFIG_SCSI_PROC_FS */
 880
 881 out:
 882        if (error)
 883                scsi_exit_devinfo();
 884        return error;
 885}
 886