LXR linux/drivers/scsi/scsi

   1// SPDX-License-Identifier: GPL-2.0
   2
   3#include <linux/blkdev.h>
   4#include <linux/init.h>
   5#include <linux/kernel.h>
   6#include <linux/module.h>
   7#include <linux/moduleparam.h>
   8#include <linux/proc_fs.h>
   9#include <linux/seq_file.h>
  10#include <linux/slab.h>
  11
  12#include <scsi/scsi_device.h>
  13#include <scsi/scsi_devinfo.h>
  14
  15#include "scsi_priv.h"
  16
  17
  18/*
  19 * scsi_dev_info_list: structure to hold black/white listed devices.
  20 */
  21struct scsi_dev_info_list {
  22        struct list_head dev_info_list;
  23        char vendor[8];
  24        char model[16];
  25        blist_flags_t flags;
  26        unsigned compatible; /* for use with scsi_static_device_list entries */
  27};
  28
  29struct scsi_dev_info_list_table {
  30        struct list_head node;  /* our node for being on the master list */
  31        struct list_head scsi_dev_info_list; /* head of dev info list */
  32        const char *name;       /* name of list for /proc (NULL for global) */
  33        int key;                /* unique numeric identifier */
  34};
  35
  36
  37static blist_flags_t 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        blist_flags_t 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", NULL, BLIST_NOLUN},            /* scanjet iip */
 112        {"HP", "C2500A", NULL, 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 | BLIST_BORKEN},
 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        {"AIX", "VDASD", NULL, BLIST_TRY_VPD_PAGES},
 138        {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
 139        {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_FORCELUN | BLIST_INQUIRY_36},
 140        {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
 141        {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
 142        {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
 143        {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
 144        {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
 145        {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
 146        {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
 147        {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
 148                BLIST_MAX_512 | BLIST_REPORTLUN2},      /* Compaq RA4x00 */
 149        {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
 150        {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
 151        {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 152        {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 153        {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 154        {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
 155        {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 156        {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
 157        {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
 158        {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
 159        {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
 160        {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
 161        {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* EMC CLARiiON, storage on LUN 0 */
 162        {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* EMC CLARiiON, no storage on LUN 0 */
 163        {"EMC",  "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 164        {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
 165         BLIST_REPORTLUN2 | BLIST_RETRY_ITF},
 166        {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
 167        {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
 168        {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
 169        {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
 170        {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 171        {"FUJITSU", "ETERNUS_DXM", "*", BLIST_RETRY_ASC_C1},
 172        {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
 173        {"Generic", "USB Storage-SMC", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36}, /* FW: 0180 and 0207 */
 174        {"HITACHI", "DF400", "*", BLIST_REPORTLUN2},
 175        {"HITACHI", "DF500", "*", BLIST_REPORTLUN2},
 176        {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
 177        {"HITACHI", "HUS1530", "*", BLIST_NO_DIF},
 178        {"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES},
 179        {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 180        {"HP", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES}, /* HP XP Arrays */
 181        {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 182        {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 183        {"HP", "C1557A", NULL, BLIST_FORCELUN},
 184        {"HP", "C3323-300", "4269", BLIST_NOTQ},
 185        {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
 186        {"HP", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
 187        {"HPE", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES},
 188        {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 189        {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 190        {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
 191        {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 192        {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
 193        {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 194        {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 195        {"INSITE", "I325VM", NULL, BLIST_KEY},
 196        {"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
 197        {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 198        {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 199        {"Marvell", "Console", NULL, BLIST_SKIP_VPD_PAGES},
 200        {"Marvell", "91xx Config", "1.01", BLIST_SKIP_VPD_PAGES},
 201        {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 202        {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 203        {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 204        {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 205        {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 206        {"MICROP", "4110", NULL, BLIST_NOTQ},
 207        {"MSFT", "Virtual HD", NULL, BLIST_MAX_1024 | BLIST_NO_RSOC},
 208        {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 209        {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 210        {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 211        {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 212        {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 213        {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 214        {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 215        {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 216        {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 217        {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 218        {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 219        {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 220        {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
 221        {"Promise", "", NULL, BLIST_SPARSELUN},
 222        {"QEMU", "QEMU CD-ROM", NULL, BLIST_SKIP_VPD_PAGES},
 223        {"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
 224        {"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
 225        {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 226        {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 227        {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 228        {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 229        {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 230        {"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
 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        {"STK", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 239        {"NETAPP", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 240        {"LSI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 241        {"ENGENIO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 242        {"LENOVO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 243        {"FUJITSU", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 244        {"SanDisk", "Cruzer Blade", NULL, BLIST_TRY_VPD_PAGES |
 245                BLIST_INQUIRY_36},
 246        {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 247        {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 248        {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 249        {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 250        {"SUN", "T300", "*", BLIST_SPARSELUN},
 251        {"SUN", "T4", "*", BLIST_SPARSELUN},
 252        {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 253        {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 254        {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 255        {"Traxdata", "CDR4120", NULL, BLIST_NOLUN},     /* locks up */
 256        {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 257        {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 258        {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 259        {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 260        {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 261        {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 262        {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 263        {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 264        { NULL, NULL, NULL, 0 },
 265};
 266
 267static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
 268{
 269        struct scsi_dev_info_list_table *devinfo_table;
 270        int found = 0;
 271
 272        list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
 273                if (devinfo_table->key == key) {
 274                        found = 1;
 275                        break;
 276                }
 277        if (!found)
 278                return ERR_PTR(-EINVAL);
 279
 280        return devinfo_table;
 281}
 282
 283/*
 284 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 285 * devinfo vendor and model strings.
 286 */
 287static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 288                                char *from, int compatible)
 289{
 290        size_t from_length;
 291
 292        from_length = strlen(from);
 293        /* This zero-pads the destination */
 294        strncpy(to, from, to_length);
 295        if (from_length < to_length && !compatible) {
 296                /*
 297                 * space pad the string if it is short.
 298                 */
 299                memset(&to[from_length], ' ', to_length - from_length);
 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, blist_flags_t 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, blist_flags_t flags,
 350                                 enum scsi_devinfo_key key)
 351{
 352        struct scsi_dev_info_list *devinfo;
 353        struct scsi_dev_info_list_table *devinfo_table =
 354                scsi_devinfo_lookup_by_key(key);
 355
 356        if (IS_ERR(devinfo_table))
 357                return PTR_ERR(devinfo_table);
 358
 359        devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 360        if (!devinfo) {
 361                printk(KERN_ERR "%s: no memory\n", __func__);
 362                return -ENOMEM;
 363        }
 364
 365        scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 366                            vendor, compatible);
 367        scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 368                            model, compatible);
 369
 370        if (strflags) {
 371                unsigned long long val;
 372                int ret = kstrtoull(strflags, 0, &val);
 373
 374                if (ret != 0) {
 375                        kfree(devinfo);
 376                        return ret;
 377                }
 378                flags = (__force blist_flags_t)val;
 379        }
 380        if (flags & __BLIST_UNUSED_MASK) {
 381                pr_err("scsi_devinfo (%s:%s): unsupported flags 0x%llx",
 382                       vendor, model, flags & __BLIST_UNUSED_MASK);
 383                kfree(devinfo);
 384                return -EINVAL;
 385        }
 386        devinfo->flags = flags;
 387        devinfo->compatible = compatible;
 388
 389        if (compatible)
 390                list_add_tail(&devinfo->dev_info_list,
 391                              &devinfo_table->scsi_dev_info_list);
 392        else
 393                list_add(&devinfo->dev_info_list,
 394                         &devinfo_table->scsi_dev_info_list);
 395
 396        return 0;
 397}
 398EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
 399
 400/**
 401 * scsi_dev_info_list_find - find a matching dev_info list entry.
 402 * @vendor:     full vendor string
 403 * @model:      full model (product) string
 404 * @key:        specify list to use
 405 *
 406 * Description:
 407 *      Finds the first dev_info entry matching @vendor, @model
 408 *      in list specified by @key.
 409 *
 410 * Returns: pointer to matching entry, or ERR_PTR on failure.
 411 **/
 412static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
 413                const char *model, enum scsi_devinfo_key key)
 414{
 415        struct scsi_dev_info_list *devinfo;
 416        struct scsi_dev_info_list_table *devinfo_table =
 417                scsi_devinfo_lookup_by_key(key);
 418        size_t vmax, mmax, mlen;
 419        const char *vskip, *mskip;
 420
 421        if (IS_ERR(devinfo_table))
 422                return (struct scsi_dev_info_list *) devinfo_table;
 423
 424        /* Prepare for "compatible" matches */
 425
 426        /*
 427         * XXX why skip leading spaces? If an odd INQUIRY
 428         * value, that should have been part of the
 429         * scsi_static_device_list[] entry, such as "  FOO"
 430         * rather than "FOO". Since this code is already
 431         * here, and we don't know what device it is
 432         * trying to work with, leave it as-is.
 433         */
 434        vmax = sizeof(devinfo->vendor);
 435        vskip = vendor;
 436        while (vmax > 0 && *vskip == ' ') {
 437                vmax--;
 438                vskip++;
 439        }
 440        /* Also skip trailing spaces */
 441        while (vmax > 0 && vskip[vmax - 1] == ' ')
 442                --vmax;
 443
 444        mmax = sizeof(devinfo->model);
 445        mskip = model;
 446        while (mmax > 0 && *mskip == ' ') {
 447                mmax--;
 448                mskip++;
 449        }
 450        while (mmax > 0 && mskip[mmax - 1] == ' ')
 451                --mmax;
 452
 453        list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 454                            dev_info_list) {
 455                if (devinfo->compatible) {
 456                        /*
 457                         * vendor strings must be an exact match
 458                         */
 459                        if (vmax != strnlen(devinfo->vendor,
 460                                            sizeof(devinfo->vendor)) ||
 461                            memcmp(devinfo->vendor, vskip, vmax))
 462                                continue;
 463
 464                        /*
 465                         * @model specifies the full string, and
 466                         * must be larger or equal to devinfo->model
 467                         */
 468                        mlen = strnlen(devinfo->model, sizeof(devinfo->model));
 469                        if (mmax < mlen || memcmp(devinfo->model, mskip, mlen))
 470                                continue;
 471                        return devinfo;
 472                } else {
 473                        if (!memcmp(devinfo->vendor, vendor,
 474                                    sizeof(devinfo->vendor)) &&
 475                            !memcmp(devinfo->model, model,
 476                                    sizeof(devinfo->model)))
 477                                return devinfo;
 478                }
 479        }
 480
 481        return ERR_PTR(-ENOENT);
 482}
 483
 484/**
 485 * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
 486 * @vendor:     vendor string
 487 * @model:      model (product) string
 488 * @key:        specify list to use
 489 *
 490 * Description:
 491 *      Remove and destroy one dev_info entry for @vendor, @model
 492 *      in list specified by @key.
 493 *
 494 * Returns: 0 OK, -error on failure.
 495 **/
 496int scsi_dev_info_list_del_keyed(char *vendor, char *model,
 497                                 enum scsi_devinfo_key key)
 498{
 499        struct scsi_dev_info_list *found;
 500
 501        found = scsi_dev_info_list_find(vendor, model, key);
 502        if (IS_ERR(found))
 503                return PTR_ERR(found);
 504
 505        list_del(&found->dev_info_list);
 506        kfree(found);
 507        return 0;
 508}
 509EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
 510
 511/**
 512 * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 513 * @dev_list:   string of device flags to add
 514 *
 515 * Description:
 516 *      Parse dev_list, and add entries to the scsi_dev_info_list.
 517 *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 518 *      dev_list is modified via strsep. Can be called for command line
 519 *      addition, for proc or mabye a sysfs interface.
 520 *
 521 * Returns: 0 if OK, -error on failure.
 522 **/
 523static int scsi_dev_info_list_add_str(char *dev_list)
 524{
 525        char *vendor, *model, *strflags, *next;
 526        char *next_check;
 527        int res = 0;
 528
 529        next = dev_list;
 530        if (next && next[0] == '"') {
 531                /*
 532                 * Ignore both the leading and trailing quote.
 533                 */
 534                next++;
 535                next_check = ",\"";
 536        } else {
 537                next_check = ",";
 538        }
 539
 540        /*
 541         * For the leading and trailing '"' case, the for loop comes
 542         * through the last time with vendor[0] == '\0'.
 543         */
 544        for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 545             && (res == 0); vendor = strsep(&next, ":")) {
 546                strflags = NULL;
 547                model = strsep(&next, ":");
 548                if (model)
 549                        strflags = strsep(&next, next_check);
 550                if (!model || !strflags) {
 551                        printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 552                               " '%s'\n", __func__, vendor, model,
 553                               strflags);
 554                        res = -EINVAL;
 555                } else
 556                        res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 557                                                     model, strflags, 0);
 558        }
 559        return res;
 560}
 561
 562/**
 563 * scsi_get_device_flags - get device specific flags from the dynamic
 564 *      device list.
 565 * @sdev:       &scsi_device to get flags for
 566 * @vendor:     vendor name
 567 * @model:      model name
 568 *
 569 * Description:
 570 *     Search the global scsi_dev_info_list (specified by list zero)
 571 *     for an entry matching @vendor and @model, if found, return the
 572 *     matching flags value, else return the host or global default
 573 *     settings.  Called during scan time.
 574 **/
 575blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
 576                                    const unsigned char *vendor,
 577                                    const unsigned char *model)
 578{
 579        return scsi_get_device_flags_keyed(sdev, vendor, model,
 580                                           SCSI_DEVINFO_GLOBAL);
 581}
 582
 583
 584/**
 585 * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
 586 * @sdev:       &scsi_device to get flags for
 587 * @vendor:     vendor name
 588 * @model:      model name
 589 * @key:        list to look up
 590 *
 591 * Description:
 592 *     Search the scsi_dev_info_list specified by @key for an entry
 593 *     matching @vendor and @model, if found, return the matching
 594 *     flags value, else return the host or global default settings.
 595 *     Called during scan time.
 596 **/
 597blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
 598                                const unsigned char *vendor,
 599                                const unsigned char *model,
 600                                enum scsi_devinfo_key key)
 601{
 602        struct scsi_dev_info_list *devinfo;
 603
 604        devinfo = scsi_dev_info_list_find(vendor, model, key);
 605        if (!IS_ERR(devinfo))
 606                return devinfo->flags;
 607
 608        /* key or device not found: return nothing */
 609        if (key != SCSI_DEVINFO_GLOBAL)
 610                return 0;
 611
 612        /* except for the global list, where we have an exception */
 613        if (sdev->sdev_bflags)
 614                return sdev->sdev_bflags;
 615
 616        return scsi_default_dev_flags;
 617}
 618EXPORT_SYMBOL(scsi_get_device_flags_keyed);
 619
 620#ifdef CONFIG_SCSI_PROC_FS
 621struct double_list {
 622        struct list_head *top;
 623        struct list_head *bottom;
 624};
 625
 626static int devinfo_seq_show(struct seq_file *m, void *v)
 627{
 628        struct double_list *dl = v;
 629        struct scsi_dev_info_list_table *devinfo_table =
 630                list_entry(dl->top, struct scsi_dev_info_list_table, node);
 631        struct scsi_dev_info_list *devinfo =
 632                list_entry(dl->bottom, struct scsi_dev_info_list,
 633                           dev_info_list);
 634
 635        if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
 636            devinfo_table->name)
 637                seq_printf(m, "[%s]:\n", devinfo_table->name);
 638
 639        seq_printf(m, "'%.8s' '%.16s' 0x%llx\n",
 640                   devinfo->vendor, devinfo->model, devinfo->flags);
 641        return 0;
 642}
 643
 644static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
 645{
 646        struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
 647        loff_t pos = *ppos;
 648
 649        if (!dl)
 650                return NULL;
 651
 652        list_for_each(dl->top, &scsi_dev_info_list) {
 653                struct scsi_dev_info_list_table *devinfo_table =
 654                        list_entry(dl->top, struct scsi_dev_info_list_table,
 655                                   node);
 656                list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
 657                        if (pos-- == 0)
 658                                return dl;
 659        }
 660
 661        kfree(dl);
 662        return NULL;
 663}
 664
 665static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
 666{
 667        struct double_list *dl = v;
 668        struct scsi_dev_info_list_table *devinfo_table =
 669                list_entry(dl->top, struct scsi_dev_info_list_table, node);
 670
 671        ++*ppos;
 672        dl->bottom = dl->bottom->next;
 673        while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
 674                dl->top = dl->top->next;
 675                if (dl->top == &scsi_dev_info_list) {
 676                        kfree(dl);
 677                        return NULL;
 678                }
 679                devinfo_table = list_entry(dl->top,
 680                                           struct scsi_dev_info_list_table,
 681                                           node);
 682                dl->bottom = devinfo_table->scsi_dev_info_list.next;
 683        }
 684
 685        return dl;
 686}
 687
 688static void devinfo_seq_stop(struct seq_file *m, void *v)
 689{
 690        kfree(v);
 691}
 692
 693static const struct seq_operations scsi_devinfo_seq_ops = {
 694        .start  = devinfo_seq_start,
 695        .next   = devinfo_seq_next,
 696        .stop   = devinfo_seq_stop,
 697        .show   = devinfo_seq_show,
 698};
 699
 700static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 701{
 702        return seq_open(file, &scsi_devinfo_seq_ops);
 703}
 704
 705/*
 706 * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 707 *
 708 * Description: Adds a black/white list entry for vendor and model with an
 709 * integer value of flag to the scsi device info list.
 710 * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 711 */
 712static ssize_t proc_scsi_devinfo_write(struct file *file,
 713                                       const char __user *buf,
 714                                       size_t length, loff_t *ppos)
 715{
 716        char *buffer;
 717        ssize_t err = length;
 718
 719        if (!buf || length>PAGE_SIZE)
 720                return -EINVAL;
 721        if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 722                return -ENOMEM;
 723        if (copy_from_user(buffer, buf, length)) {
 724                err =-EFAULT;
 725                goto out;
 726        }
 727
 728        if (length < PAGE_SIZE)
 729                buffer[length] = '\0';
 730        else if (buffer[PAGE_SIZE-1]) {
 731                err = -EINVAL;
 732                goto out;
 733        }
 734
 735        scsi_dev_info_list_add_str(buffer);
 736
 737out:
 738        free_page((unsigned long)buffer);
 739        return err;
 740}
 741
 742static const struct proc_ops scsi_devinfo_proc_ops = {
 743        .proc_open      = proc_scsi_devinfo_open,
 744        .proc_read      = seq_read,
 745        .proc_write     = proc_scsi_devinfo_write,
 746        .proc_lseek     = seq_lseek,
 747        .proc_release   = seq_release,
 748};
 749#endif /* CONFIG_SCSI_PROC_FS */
 750
 751module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 752MODULE_PARM_DESC(dev_flags,
 753         "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 754         " list entries for vendor and model with an integer value of flags"
 755         " to the scsi device info list");
 756
 757module_param_named(default_dev_flags, scsi_default_dev_flags, ullong, 0644);
 758MODULE_PARM_DESC(default_dev_flags,
 759                 "scsi default device flag uint64_t value");
 760
 761/**
 762 * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 763 **/
 764void scsi_exit_devinfo(void)
 765{
 766#ifdef CONFIG_SCSI_PROC_FS
 767        remove_proc_entry("scsi/device_info", NULL);
 768#endif
 769
 770        scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 771}
 772
 773/**
 774 * scsi_dev_info_add_list - add a new devinfo list
 775 * @key:        key of the list to add
 776 * @name:       Name of the list to add (for /proc/scsi/device_info)
 777 *
 778 * Adds the requested list, returns zero on success, -EEXIST if the
 779 * key is already registered to a list, or other error on failure.
 780 */
 781int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name)
 782{
 783        struct scsi_dev_info_list_table *devinfo_table =
 784                scsi_devinfo_lookup_by_key(key);
 785
 786        if (!IS_ERR(devinfo_table))
 787                /* list already exists */
 788                return -EEXIST;
 789
 790        devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 791
 792        if (!devinfo_table)
 793                return -ENOMEM;
 794
 795        INIT_LIST_HEAD(&devinfo_table->node);
 796        INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 797        devinfo_table->name = name;
 798        devinfo_table->key = key;
 799        list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 800
 801        return 0;
 802}
 803EXPORT_SYMBOL(scsi_dev_info_add_list);
 804
 805/**
 806 * scsi_dev_info_remove_list - destroy an added devinfo list
 807 * @key: key of the list to destroy
 808 *
 809 * Iterates over the entire list first, freeing all the values, then
 810 * frees the list itself.  Returns 0 on success or -EINVAL if the key
 811 * can't be found.
 812 */
 813int scsi_dev_info_remove_list(enum scsi_devinfo_key key)
 814{
 815        struct list_head *lh, *lh_next;
 816        struct scsi_dev_info_list_table *devinfo_table =
 817                scsi_devinfo_lookup_by_key(key);
 818
 819        if (IS_ERR(devinfo_table))
 820                /* no such list */
 821                return -EINVAL;
 822
 823        /* remove from the master list */
 824        list_del(&devinfo_table->node);
 825
 826        list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 827                struct scsi_dev_info_list *devinfo;
 828
 829                devinfo = list_entry(lh, struct scsi_dev_info_list,
 830                                     dev_info_list);
 831                kfree(devinfo);
 832        }
 833        kfree(devinfo_table);
 834
 835        return 0;
 836}
 837EXPORT_SYMBOL(scsi_dev_info_remove_list);
 838
 839/**
 840 * scsi_init_devinfo - set up the dynamic device list.
 841 *
 842 * Description:
 843 *      Add command line entries from scsi_dev_flags, then add
 844 *      scsi_static_device_list entries to the scsi device info list.
 845 */
 846int __init scsi_init_devinfo(void)
 847{
 848#ifdef CONFIG_SCSI_PROC_FS
 849        struct proc_dir_entry *p;
 850#endif
 851        int error, i;
 852
 853        error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 854        if (error)
 855                return error;
 856
 857        error = scsi_dev_info_list_add_str(scsi_dev_flags);
 858        if (error)
 859                goto out;
 860
 861        for (i = 0; scsi_static_device_list[i].vendor; i++) {
 862                error = scsi_dev_info_list_add(1 /* compatibile */,
 863                                scsi_static_device_list[i].vendor,
 864                                scsi_static_device_list[i].model,
 865                                NULL,
 866                                scsi_static_device_list[i].flags);
 867                if (error)
 868                        goto out;
 869        }
 870
 871#ifdef CONFIG_SCSI_PROC_FS
 872        p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_ops);
 873        if (!p) {
 874                error = -ENOMEM;
 875                goto out;
 876        }
 877#endif /* CONFIG_SCSI_PROC_FS */
 878
 879 out:
 880        if (error)
 881                scsi_exit_devinfo();
 882        return error;
 883}
 884