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