drivers/scsi/scsi_devinfo.c

   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
  10 #include <scsi/scsi_device.h>
  11 #include <scsi/scsi_devinfo.h>
  12
  13 #include "scsi_priv.h"
  14
  15
  16 /*
  17  * scsi_dev_info_list: structure to hold black/white listed devices.
  18  */
  19 struct scsi_dev_info_list {
  20         struct list_head dev_info_list;
  21         char vendor[8];
  22         char model[16];
  23         unsigned flags;
  24         unsigned compatible; /* for use with scsi_static_device_list entries */
  25 };
  26
  27
  28 static const char spaces[] = "                "; /* 16 of them */
  29 static unsigned scsi_default_dev_flags;
  30 static LIST_HEAD(scsi_dev_info_list);
  31 static __initdata char scsi_dev_flags[256];
  32
  33 /*
  34  * scsi_static_device_list: deprecated list of devices that require
  35  * settings that differ from the default, includes black-listed (broken)
  36  * devices. The entries here are added to the tail of scsi_dev_info_list
  37  * via scsi_dev_info_list_init.
  38  *
  39  * Do not add to this list, use the command line or proc interface to add
  40  * to the scsi_dev_info_list. This table will eventually go away.
  41  */
  42 static struct {
  43         char *vendor;
  44         char *model;
  45         char *revision; /* revision known to be bad, unused */
  46         unsigned flags;
  47 } scsi_static_device_list[] __initdata = {
  48         /*
  49          * The following devices are known not to tolerate a lun != 0 scan
  50          * for one reason or another. Some will respond to all luns,
  51          * others will lock up.
  52          */
  53         {"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN},     /* locks up */
  54         {"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN},       /* locks up */
  55         {"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN},       /* locks up */
  56         {"DENON", "DRD-25X", "V", BLIST_NOLUN},                 /* locks up */
  57         {"HITACHI", "DK312C", "CM81", BLIST_NOLUN},     /* responds to all lun */
  58         {"HITACHI", "DK314C", "CR21", BLIST_NOLUN},     /* responds to all lun */
  59         {"IMS", "CDD521/10", "2.06", BLIST_NOLUN},      /* locks up */
  60         {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN},     /* locks up */
  61         {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN},     /* locks up */
  62         {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN},   /* locks up */
  63         {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN},     /* locks up */
  64         {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN},     /* locks up */
  65         {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN},    /* responds to all lun */
  66         {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
  67         {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN},    /* responds to all lun */
  68         {"RODIME", "RO3000S", "2.33", BLIST_NOLUN},     /* locks up */
  69         {"SUN", "SENA", NULL, BLIST_NOLUN},             /* responds to all luns */
  70         /*
  71          * The following causes a failed REQUEST SENSE on lun 1 for
  72          * aha152x controller, which causes SCSI code to reset bus.
  73          */
  74         {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
  75         /*
  76          * The following causes a failed REQUEST SENSE on lun 1 for
  77          * aha152x controller, which causes SCSI code to reset bus.
  78          */
  79         {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
  80         {"SEAGATE", "ST296", "921", BLIST_NOLUN},       /* responds to all lun */
  81         {"SEAGATE", "ST1581", "6538", BLIST_NOLUN},     /* responds to all lun */
  82         {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
  83         {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
  84         {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
  85         {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
  86         {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
  87         {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN},   /* locks up */
  88         {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN},       /* locks up */
  89         /*
  90          * The following causes a failed REQUEST SENSE on lun 1 for
  91          * seagate controller, which causes SCSI code to reset bus.
  92          */
  93         {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
  94         {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN},        /* responds to all lun */
  95         /*
  96          * The following causes a failed REQUEST SENSE on lun 1 for
  97          * seagate controller, which causes SCSI code to reset bus.
  98          */
  99         {"HP", "C1750A", "3226", BLIST_NOLUN},          /* scanjet iic */
 100         {"HP", "C1790A", "", BLIST_NOLUN},              /* scanjet iip */
 101         {"HP", "C2500A", "", BLIST_NOLUN},              /* scanjet iicx */
 102         {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
 103         {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN},      /* responds to all lun */
 104         {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN},     /* locks up */
 105         {"NEC", "D3856", "0009", BLIST_NOLUN},
 106         {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN},    /* locks up */
 107         {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN},    /* locks up */
 108         {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN},    /* locks up */
 109         {"RELISYS", "Scorpio", NULL, BLIST_NOLUN},      /* responds to all lun */
 110         {"SANKYO", "CP525", "6.64", BLIST_NOLUN},       /* causes failed REQ SENSE, extra reset */
 111         {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
 112         {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN},      /* locks up */
 113         {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN},      /* locks up */
 114         {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN},     /* locks up */
 115         {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN},    /* locks up */
 116
 117         /*
 118          * Other types of devices that have special flags.
 119          * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
 120          */
 121         {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
 122         {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
 123         {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
 124         {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
 125         {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
 126         {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
 127         {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
 128         {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN},
 129         {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
 130         {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 131         {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 132         {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 133         {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
 134         {"DEC", "HSG80", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 135         {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
 136         {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
 137         {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
 138         {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
 139         {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
 140         {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
 141         {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
 142         {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
 143         {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
 144         {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 145         {"HITACHI", "DF400", "*", BLIST_SPARSELUN},
 146         {"HITACHI", "DF500", "*", BLIST_SPARSELUN},
 147         {"HITACHI", "DF600", "*", BLIST_SPARSELUN},
 148         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 149         {"HP", "OPEN-", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP XP Arrays */
 150         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 151         {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 152         {"HP", "C1557A", NULL, BLIST_FORCELUN},
 153         {"HP", "C3323-300", "4269", BLIST_NOTQ},
 154         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 155         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 156         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 157         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 158         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 159         {"INSITE", "I325VM", NULL, BLIST_KEY},
 160         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 161         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 162         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 163         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 164         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 165         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 166         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 167         {"MICROP", "4110", NULL, BLIST_NOTQ},
 168         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 169         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 170         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 171         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 172         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 173         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 174         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 175         {"OTi", "CF CARD Reader", "2.00", BLIST_FORCELUN | BLIST_SINGLELUN},
 176         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 177         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 178         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 179         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 180         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 181         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 182         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 183         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 184         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 185         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 186         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 187         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 188         {"SUN", "T300", "*", BLIST_SPARSELUN},
 189         {"SUN", "T4", "*", BLIST_SPARSELUN},
 190         {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
 191         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 192         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 193         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 194         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 195         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 196         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 197         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 198         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 199
 200         /*
 201          * USB multi card readers.
 202          */
 203         {"AFT", "CF  PRO-9XP", "9144", BLIST_FORCELUN | BLIST_INQUIRY_36},
 204         {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN | BLIST_INQUIRY_36},
 205         {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_FORCELUN | BLIST_INQUIRY_36},
 206         {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
 207         {"DMI", "MultiFlash", "3.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
 208         {"eUSB", "Compact Flash", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 209         {"GENERIC", "Card Reader   CF", "v26F", BLIST_FORCELUN | BLIST_INQUIRY_36},
 210         {"General", "USB Disk Drive","1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
 211         {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
 212         {"Generic", "USB Storage-SMC", "0090", BLIST_FORCELUN | BLIST_INQUIRY_36},
 213         {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
 214         {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
 215         {"generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
 216         {"IC", "USB Storage-CFC", "322E", BLIST_FORCELUN | BLIST_INQUIRY_36},
 217         {"ICSI", "SD Card", "2.7C", BLIST_FORCELUN | BLIST_INQUIRY_36},
 218         {"IOI", "Media Bay", "*", BLIST_FORCELUN | BLIST_INQUIRY_36},
 219         {"Lexar", "Media Inc. SM/xD", "009E", BLIST_FORCELUN | BLIST_INQUIRY_36},
 220         {"Lexar", "USB Storage-SMC", "I18A", BLIST_FORCELUN | BLIST_INQUIRY_36},
 221         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN | BLIST_INQUIRY_36},
 222         {"OEI-USB", "CompactFlash", "1.01", BLIST_FORCELUN | BLIST_INQUIRY_36},
 223         {"OEI-USB2", "CompactFlash", "2.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
 224         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 225         {"SMSC", "223 U HS-CF", "1.95", BLIST_FORCELUN | BLIST_INQUIRY_36},
 226         {"SMSC", "USB 2 HS-CF", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 227         {"TwinMOS", "7-in-1 Card RWCF", "0100", BLIST_FORCELUN | BLIST_INQUIRY_36},
 228         {"USB2.0", "CardReader CF RW", "0.0>", BLIST_FORCELUN | BLIST_INQUIRY_36},
 229         {"USB2.0", "CardReader SM RW", "0814", BLIST_FORCELUN | BLIST_INQUIRY_36},
 230         {"USB2.0", "CF  CardReader", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 231         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 232         {"Y-E DATA", "CF Card Reader", "1.03", BLIST_FORCELUN | BLIST_INQUIRY_36},
 233         {"Zynet", "USB Storage-SMC", "I03A", BLIST_FORCELUN | BLIST_INQUIRY_36},
 234
 235         { NULL, NULL, NULL, 0 },
 236 };
 237
 238 /*
 239  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 240  * devinfo vendor and model strings.
 241  */
 242 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 243                                 char *from, int compatible)
 244 {
 245         size_t from_length;
 246
 247         from_length = strlen(from);
 248         strncpy(to, from, min(to_length, from_length));
 249         if (from_length < to_length) {
 250                 if (compatible) {
 251                         /*
 252                          * NUL terminate the string if it is short.
 253                          */
 254                         to[from_length] = '\0';
 255                 } else {
 256                         /*
 257                          * space pad the string if it is short.
 258                          */
 259                         strncpy(&to[from_length], spaces,
 260                                 to_length - from_length);
 261                 }
 262         }
 263         if (from_length > to_length)
 264                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 265                         __FUNCTION__, name, from);
 266 }
 267
 268 /**
 269  * scsi_dev_info_list_add: add one dev_info list entry.
 270  * @vendor:     vendor string
 271  * @model:      model (product) string
 272  * @strflags:   integer string
 273  * @flag:       if strflags NULL, use this flag value
 274  *
 275  * Description:
 276  *      Create and add one dev_info entry for @vendor, @model, @strflags or
 277  *      @flag. If @compatible, add to the tail of the list, do not space
 278  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 279  *      are added with @compatible 1 and @clfags NULL.
 280  *
 281  * Returns: 0 OK, -error on failure.
 282  **/
 283 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 284                             char *strflags, int flags)
 285 {
 286         struct scsi_dev_info_list *devinfo;
 287
 288         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 289         if (!devinfo) {
 290                 printk(KERN_ERR "%s: no memory\n", __FUNCTION__);
 291                 return -ENOMEM;
 292         }
 293
 294         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 295                             vendor, compatible);
 296         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 297                             model, compatible);
 298
 299         if (strflags)
 300                 devinfo->flags = simple_strtoul(strflags, NULL, 0);
 301         else
 302                 devinfo->flags = flags;
 303
 304         devinfo->compatible = compatible;
 305
 306         if (compatible)
 307                 list_add_tail(&devinfo->dev_info_list, &scsi_dev_info_list);
 308         else
 309                 list_add(&devinfo->dev_info_list, &scsi_dev_info_list);
 310
 311         return 0;
 312 }
 313
 314 /**
 315  * scsi_dev_info_list_add_str: parse dev_list and add to the
 316  * scsi_dev_info_list.
 317  * @dev_list:   string of device flags to add
 318  *
 319  * Description:
 320  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 321  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 322  *      dev_list is modified via strsep. Can be called for command line
 323  *      addition, for proc or mabye a sysfs interface.
 324  *
 325  * Returns: 0 if OK, -error on failure.
 326  **/
 327 static int scsi_dev_info_list_add_str(char *dev_list)
 328 {
 329         char *vendor, *model, *strflags, *next;
 330         char *next_check;
 331         int res = 0;
 332
 333         next = dev_list;
 334         if (next && next[0] == '"') {
 335                 /*
 336                  * Ignore both the leading and trailing quote.
 337                  */
 338                 next++;
 339                 next_check = ",\"";
 340         } else {
 341                 next_check = ",";
 342         }
 343
 344         /*
 345          * For the leading and trailing '"' case, the for loop comes
 346          * through the last time with vendor[0] == '\0'.
 347          */
 348         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 349              && (res == 0); vendor = strsep(&next, ":")) {
 350                 strflags = NULL;
 351                 model = strsep(&next, ":");
 352                 if (model)
 353                         strflags = strsep(&next, next_check);
 354                 if (!model || !strflags) {
 355                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 356                                " '%s'\n", __FUNCTION__, vendor, model,
 357                                strflags);
 358                         res = -EINVAL;
 359                 } else
 360                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 361                                                      model, strflags, 0);
 362         }
 363         return res;
 364 }
 365
 366 /**
 367  * get_device_flags - get device specific flags from the dynamic device
 368  * list. Called during scan time.
 369  * @vendor:     vendor name
 370  * @model:      model name
 371  *
 372  * Description:
 373  *     Search the scsi_dev_info_list for an entry matching @vendor and
 374  *     @model, if found, return the matching flags value, else return
 375  *     the host or global default settings.
 376  **/
 377 int scsi_get_device_flags(struct scsi_device *sdev, unsigned char *vendor,
 378                           unsigned char *model)
 379 {
 380         struct scsi_dev_info_list *devinfo;
 381         unsigned int bflags;
 382
 383         bflags = sdev->sdev_bflags;
 384         if (!bflags)
 385                 bflags = scsi_default_dev_flags;
 386
 387         list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
 388                 if (devinfo->compatible) {
 389                         /*
 390                          * Behave like the older version of get_device_flags.
 391                          */
 392                         size_t max;
 393                         /*
 394                          * XXX why skip leading spaces? If an odd INQUIRY
 395                          * value, that should have been part of the
 396                          * scsi_static_device_list[] entry, such as "  FOO"
 397                          * rather than "FOO". Since this code is already
 398                          * here, and we don't know what device it is
 399                          * trying to work with, leave it as-is.
 400                          */
 401                         max = 8;        /* max length of vendor */
 402                         while ((max > 0) && *vendor == ' ') {
 403                                 max--;
 404                                 vendor++;
 405                         }
 406                         /*
 407                          * XXX removing the following strlen() would be
 408                          * good, using it means that for a an entry not in
 409                          * the list, we scan every byte of every vendor
 410                          * listed in scsi_static_device_list[], and never match
 411                          * a single one (and still have to compare at
 412                          * least the first byte of each vendor).
 413                          */
 414                         if (memcmp(devinfo->vendor, vendor,
 415                                     min(max, strlen(devinfo->vendor))))
 416                                 continue;
 417                         /*
 418                          * Skip spaces again.
 419                          */
 420                         max = 16;       /* max length of model */
 421                         while ((max > 0) && *model == ' ') {
 422                                 max--;
 423                                 model++;
 424                         }
 425                         if (memcmp(devinfo->model, model,
 426                                    min(max, strlen(devinfo->model))))
 427                                 continue;
 428                         return devinfo->flags;
 429                 } else {
 430                         if (!memcmp(devinfo->vendor, vendor,
 431                                      sizeof(devinfo->vendor)) &&
 432                              !memcmp(devinfo->model, model,
 433                                       sizeof(devinfo->model)))
 434                                 return devinfo->flags;
 435                 }
 436         }
 437         return bflags;
 438 }
 439
 440 #ifdef CONFIG_SCSI_PROC_FS
 441 /*
 442  * proc_scsi_dev_info_read: dump the scsi_dev_info_list via
 443  * /proc/scsi/device_info
 444  */
 445 static int proc_scsi_devinfo_read(char *buffer, char **start,
 446                                   off_t offset, int length)
 447 {
 448         struct scsi_dev_info_list *devinfo;
 449         int size, len = 0;
 450         off_t begin = 0;
 451         off_t pos = 0;
 452
 453         list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
 454                 size = sprintf(buffer + len, "'%.8s' '%.16s' 0x%x\n",
 455                         devinfo->vendor, devinfo->model, devinfo->flags);
 456                 len += size;
 457                 pos = begin + len;
 458                 if (pos < offset) {
 459                         len = 0;
 460                         begin = pos;
 461                 }
 462                 if (pos > offset + length)
 463                         goto stop_output;
 464         }
 465
 466 stop_output:
 467         *start = buffer + (offset - begin);     /* Start of wanted data */
 468         len -= (offset - begin);        /* Start slop */
 469         if (len > length)
 470                 len = length;   /* Ending slop */
 471         return (len);
 472 }
 473
 474 /*
 475  * proc_scsi_dev_info_write: allow additions to the scsi_dev_info_list via
 476  * /proc.
 477  *
 478  * Use: echo "vendor:model:flag" > /proc/scsi/device_info
 479  *
 480  * To add a black/white list entry for vendor and model with an integer
 481  * value of flag to the scsi device info list.
 482  */
 483 static int proc_scsi_devinfo_write(struct file *file, const char __user *buf,
 484                                    unsigned long length, void *data)
 485 {
 486         char *buffer;
 487         int err = length;
 488
 489         if (!buf || length>PAGE_SIZE)
 490                 return -EINVAL;
 491         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 492                 return -ENOMEM;
 493         if (copy_from_user(buffer, buf, length)) {
 494                 err =-EFAULT;
 495                 goto out;
 496         }
 497
 498         if (length < PAGE_SIZE)
 499                 buffer[length] = '\0';
 500         else if (buffer[PAGE_SIZE-1]) {
 501                 err = -EINVAL;
 502                 goto out;
 503         }
 504
 505         scsi_dev_info_list_add_str(buffer);
 506
 507 out:
 508         free_page((unsigned long)buffer);
 509         return err;
 510 }
 511 #endif /* CONFIG_SCSI_PROC_FS */
 512
 513 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 514 MODULE_PARM_DESC(dev_flags,
 515          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 516          " list entries for vendor and model with an integer value of flags"
 517          " to the scsi device info list");
 518
 519 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 520 MODULE_PARM_DESC(default_dev_flags,
 521                  "scsi default device flag integer value");
 522
 523 /**
 524  * scsi_dev_info_list_delete: called from scsi.c:exit_scsi to remove
 525  *      the scsi_dev_info_list.
 526  **/
 527 void scsi_exit_devinfo(void)
 528 {
 529         struct list_head *lh, *lh_next;
 530         struct scsi_dev_info_list *devinfo;
 531
 532 #ifdef CONFIG_SCSI_PROC_FS
 533         remove_proc_entry("scsi/device_info", NULL);
 534 #endif
 535
 536         list_for_each_safe(lh, lh_next, &scsi_dev_info_list) {
 537                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 538                                      dev_info_list);
 539                 kfree(devinfo);
 540         }
 541 }
 542
 543 /**
 544  * scsi_dev_list_init: set up the dynamic device list.
 545  * @dev_list:   string of device flags to add
 546  *
 547  * Description:
 548  *      Add command line @dev_list entries, then add
 549  *      scsi_static_device_list entries to the scsi device info list.
 550  **/
 551 int __init scsi_init_devinfo(void)
 552 {
 553 #ifdef CONFIG_SCSI_PROC_FS
 554         struct proc_dir_entry *p;
 555 #endif
 556         int error, i;
 557
 558         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 559         if (error)
 560                 return error;
 561
 562         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 563                 error = scsi_dev_info_list_add(1 /* compatibile */,
 564                                 scsi_static_device_list[i].vendor,
 565                                 scsi_static_device_list[i].model,
 566                                 NULL,
 567                                 scsi_static_device_list[i].flags);
 568                 if (error)
 569                         goto out;
 570         }
 571
 572 #ifdef CONFIG_SCSI_PROC_FS
 573         p = create_proc_entry("scsi/device_info", 0, NULL);
 574         if (!p) {
 575                 error = -ENOMEM;
 576                 goto out;
 577         }
 578
 579         p->owner = THIS_MODULE;
 580         p->get_info = proc_scsi_devinfo_read;
 581         p->write_proc = proc_scsi_devinfo_write;
 582 #endif /* CONFIG_SCSI_PROC_FS */
 583
 584  out:
 585         if (error)
 586                 scsi_exit_devinfo();
 587         return error;
 588 }