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 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         {"IBM", "2104-DU3", NULL, BLIST_NOLUN},         /* locks up */
  60         {"IBM", "2104-TU3", NULL, BLIST_NOLUN},         /* locks up */
  61         {"IMS", "CDD521/10", "2.06", BLIST_NOLUN},      /* locks up */
  62         {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN},     /* locks up */
  63         {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN},     /* locks up */
  64         {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN},   /* locks up */
  65         {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN},     /* locks up */
  66         {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN},     /* locks up */
  67         {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN},    /* responds to all lun */
  68         {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN},      /* responds to all lun */
  69         {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
  70         {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN},    /* responds to all lun */
  71         {"RODIME", "RO3000S", "2.33", BLIST_NOLUN},     /* locks up */
  72         {"SUN", "SENA", NULL, BLIST_NOLUN},             /* responds to all luns */
  73         /*
  74          * The following causes a failed REQUEST SENSE on lun 1 for
  75          * aha152x controller, which causes SCSI code to reset bus.
  76          */
  77         {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
  78         /*
  79          * The following causes a failed REQUEST SENSE on lun 1 for
  80          * aha152x controller, which causes SCSI code to reset bus.
  81          */
  82         {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
  83         {"SEAGATE", "ST296", "921", BLIST_NOLUN},       /* responds to all lun */
  84         {"SEAGATE", "ST1581", "6538", BLIST_NOLUN},     /* responds to all lun */
  85         {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
  86         {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
  87         {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
  88         {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
  89         {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
  90         {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN},   /* locks up */
  91         {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN},       /* locks up */
  92         /*
  93          * The following causes a failed REQUEST SENSE on lun 1 for
  94          * seagate controller, which causes SCSI code to reset bus.
  95          */
  96         {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
  97         {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN},        /* responds to all lun */
  98         /*
  99          * The following causes a failed REQUEST SENSE on lun 1 for
 100          * seagate controller, which causes SCSI code to reset bus.
 101          */
 102         {"HP", "C1750A", "3226", BLIST_NOLUN},          /* scanjet iic */
 103         {"HP", "C1790A", "", BLIST_NOLUN},              /* scanjet iip */
 104         {"HP", "C2500A", "", BLIST_NOLUN},              /* scanjet iicx */
 105         {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
 106         {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN},      /* responds to all lun */
 107         {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN},     /* locks up */
 108         {"NEC", "D3856", "0009", BLIST_NOLUN},
 109         {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN},    /* locks up */
 110         {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN},    /* locks up */
 111         {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN},    /* locks up */
 112         {"RELISYS", "Scorpio", NULL, BLIST_NOLUN},      /* responds to all lun */
 113         {"SANKYO", "CP525", "6.64", BLIST_NOLUN},       /* causes failed REQ SENSE, extra reset */
 114         {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
 115         {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
 116         {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN},      /* locks up */
 117         {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN},      /* locks up */
 118         {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN},     /* locks up */
 119         {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN},    /* locks up */
 120         {"", "Scanner", "1.80", BLIST_NOLUN},   /* responds to all lun */
 121
 122         /*
 123          * Other types of devices that have special flags.
 124          * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
 125          */
 126         {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
 127         {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
 128         {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
 129         {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
 130         {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_FORCELUN | BLIST_INQUIRY_36},
 131         {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
 132         {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
 133         {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
 134         {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
 135         {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
 136         {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
 137         {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
 138         {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
 139                 BLIST_MAX_512 | BLIST_REPORTLUN2},      /* Compaq RA4x00 */
 140         {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
 141         {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
 142         {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 143         {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 144         {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 145         {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
 146         {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 147         {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
 148         {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
 149         {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
 150         {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
 151         {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
 152         {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
 153         {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
 154         {"EMC",  "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 155         {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
 156         {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
 157         {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
 158         {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
 159         {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
 160         {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 161         {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
 162         {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
 163         {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
 164         {"HITACHI", "DF400", "*", BLIST_SPARSELUN},
 165         {"HITACHI", "DF500", "*", BLIST_SPARSELUN},
 166         {"HITACHI", "DF600", "*", BLIST_SPARSELUN},
 167         {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
 168         {"HITACHI", "OPEN-E", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
 169         {"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 170         {"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 171         {"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 172         {"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 173         {"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 174         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 175         {"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
 176         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 177         {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 178         {"HP", "C1557A", NULL, BLIST_FORCELUN},
 179         {"HP", "C3323-300", "4269", BLIST_NOTQ},
 180         {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
 181         {"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 182         {"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 183         {"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 184         {"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 185         {"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 186         {"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 187         {"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 188         {"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 189         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 190         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 191         {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
 192         {"iomega", "jaz 1GB", "J.86", 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         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 197         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 198         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 199         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 200         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 201         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 202         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 203         {"MICROP", "4110", NULL, BLIST_NOTQ},
 204         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 205         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 206         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 207         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 208         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 209         {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 210         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 211         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 212         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 213         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 214         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 215         {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 216         {"Promise", "", NULL, BLIST_SPARSELUN},
 217         {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 218         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 219         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 220         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 221         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 222         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 223         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 224         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 225         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 226         {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 227         {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 228         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 229         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 230         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 231         {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 232         {"SUN", "T300", "*", BLIST_SPARSELUN},
 233         {"SUN", "T4", "*", BLIST_SPARSELUN},
 234         {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
 235         {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 236         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 237         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 238         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 239         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 240         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 241         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 242         {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 243         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 244         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 245         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 246         { NULL, NULL, NULL, 0 },
 247 };
 248
 249 /*
 250  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 251  * devinfo vendor and model strings.
 252  */
 253 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 254                                 char *from, int compatible)
 255 {
 256         size_t from_length;
 257
 258         from_length = strlen(from);
 259         strncpy(to, from, min(to_length, from_length));
 260         if (from_length < to_length) {
 261                 if (compatible) {
 262                         /*
 263                          * NUL terminate the string if it is short.
 264                          */
 265                         to[from_length] = '\0';
 266                 } else {
 267                         /*
 268                          * space pad the string if it is short.
 269                          */
 270                         strncpy(&to[from_length], spaces,
 271                                 to_length - from_length);
 272                 }
 273         }
 274         if (from_length > to_length)
 275                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 276                         __func__, name, from);
 277 }
 278
 279 /**
 280  * scsi_dev_info_list_add - add one dev_info list entry.
 281  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 282  * @vendor:     vendor string
 283  * @model:      model (product) string
 284  * @strflags:   integer string
 285  * @flags:      if strflags NULL, use this flag value
 286  *
 287  * Description:
 288  *      Create and add one dev_info entry for @vendor, @model, @strflags or
 289  *      @flag. If @compatible, add to the tail of the list, do not space
 290  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 291  *      are added with @compatible 1 and @clfags NULL.
 292  *
 293  * Returns: 0 OK, -error on failure.
 294  **/
 295 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 296                             char *strflags, int flags)
 297 {
 298         struct scsi_dev_info_list *devinfo;
 299
 300         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 301         if (!devinfo) {
 302                 printk(KERN_ERR "%s: no memory\n", __func__);
 303                 return -ENOMEM;
 304         }
 305
 306         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 307                             vendor, compatible);
 308         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 309                             model, compatible);
 310
 311         if (strflags)
 312                 devinfo->flags = simple_strtoul(strflags, NULL, 0);
 313         else
 314                 devinfo->flags = flags;
 315
 316         devinfo->compatible = compatible;
 317
 318         if (compatible)
 319                 list_add_tail(&devinfo->dev_info_list, &scsi_dev_info_list);
 320         else
 321                 list_add(&devinfo->dev_info_list, &scsi_dev_info_list);
 322
 323         return 0;
 324 }
 325
 326 /**
 327  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 328  * @dev_list:   string of device flags to add
 329  *
 330  * Description:
 331  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 332  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 333  *      dev_list is modified via strsep. Can be called for command line
 334  *      addition, for proc or mabye a sysfs interface.
 335  *
 336  * Returns: 0 if OK, -error on failure.
 337  **/
 338 static int scsi_dev_info_list_add_str(char *dev_list)
 339 {
 340         char *vendor, *model, *strflags, *next;
 341         char *next_check;
 342         int res = 0;
 343
 344         next = dev_list;
 345         if (next && next[0] == '"') {
 346                 /*
 347                  * Ignore both the leading and trailing quote.
 348                  */
 349                 next++;
 350                 next_check = ",\"";
 351         } else {
 352                 next_check = ",";
 353         }
 354
 355         /*
 356          * For the leading and trailing '"' case, the for loop comes
 357          * through the last time with vendor[0] == '\0'.
 358          */
 359         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 360              && (res == 0); vendor = strsep(&next, ":")) {
 361                 strflags = NULL;
 362                 model = strsep(&next, ":");
 363                 if (model)
 364                         strflags = strsep(&next, next_check);
 365                 if (!model || !strflags) {
 366                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 367                                " '%s'\n", __func__, vendor, model,
 368                                strflags);
 369                         res = -EINVAL;
 370                 } else
 371                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 372                                                      model, strflags, 0);
 373         }
 374         return res;
 375 }
 376
 377 /**
 378  * get_device_flags - get device specific flags from the dynamic device list.
 379  * @sdev:       &scsi_device to get flags for
 380  * @vendor:     vendor name
 381  * @model:      model name
 382  *
 383  * Description:
 384  *     Search the scsi_dev_info_list for an entry matching @vendor and
 385  *     @model, if found, return the matching flags value, else return
 386  *     the host or global default settings.  Called during scan time.
 387  **/
 388 int scsi_get_device_flags(struct scsi_device *sdev,
 389                           const unsigned char *vendor,
 390                           const unsigned char *model)
 391 {
 392         struct scsi_dev_info_list *devinfo;
 393         unsigned int bflags;
 394
 395         bflags = sdev->sdev_bflags;
 396         if (!bflags)
 397                 bflags = scsi_default_dev_flags;
 398
 399         list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
 400                 if (devinfo->compatible) {
 401                         /*
 402                          * Behave like the older version of get_device_flags.
 403                          */
 404                         size_t max;
 405                         /*
 406                          * XXX why skip leading spaces? If an odd INQUIRY
 407                          * value, that should have been part of the
 408                          * scsi_static_device_list[] entry, such as "  FOO"
 409                          * rather than "FOO". Since this code is already
 410                          * here, and we don't know what device it is
 411                          * trying to work with, leave it as-is.
 412                          */
 413                         max = 8;        /* max length of vendor */
 414                         while ((max > 0) && *vendor == ' ') {
 415                                 max--;
 416                                 vendor++;
 417                         }
 418                         /*
 419                          * XXX removing the following strlen() would be
 420                          * good, using it means that for a an entry not in
 421                          * the list, we scan every byte of every vendor
 422                          * listed in scsi_static_device_list[], and never match
 423                          * a single one (and still have to compare at
 424                          * least the first byte of each vendor).
 425                          */
 426                         if (memcmp(devinfo->vendor, vendor,
 427                                     min(max, strlen(devinfo->vendor))))
 428                                 continue;
 429                         /*
 430                          * Skip spaces again.
 431                          */
 432                         max = 16;       /* max length of model */
 433                         while ((max > 0) && *model == ' ') {
 434                                 max--;
 435                                 model++;
 436                         }
 437                         if (memcmp(devinfo->model, model,
 438                                    min(max, strlen(devinfo->model))))
 439                                 continue;
 440                         return devinfo->flags;
 441                 } else {
 442                         if (!memcmp(devinfo->vendor, vendor,
 443                                      sizeof(devinfo->vendor)) &&
 444                              !memcmp(devinfo->model, model,
 445                                       sizeof(devinfo->model)))
 446                                 return devinfo->flags;
 447                 }
 448         }
 449         return bflags;
 450 }
 451
 452 #ifdef CONFIG_SCSI_PROC_FS
 453 static int devinfo_seq_show(struct seq_file *m, void *v)
 454 {
 455         struct scsi_dev_info_list *devinfo =
 456                 list_entry(v, struct scsi_dev_info_list, dev_info_list);
 457
 458         seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
 459                         devinfo->vendor, devinfo->model, devinfo->flags);
 460         return 0;
 461 }
 462
 463 static void * devinfo_seq_start(struct seq_file *m, loff_t *pos)
 464 {
 465         return seq_list_start(&scsi_dev_info_list, *pos);
 466 }
 467
 468 static void * devinfo_seq_next(struct seq_file *m, void *v, loff_t *pos)
 469 {
 470         return seq_list_next(v, &scsi_dev_info_list, pos);
 471 }
 472
 473 static void devinfo_seq_stop(struct seq_file *m, void *v)
 474 {
 475 }
 476
 477 static const struct seq_operations scsi_devinfo_seq_ops = {
 478         .start  = devinfo_seq_start,
 479         .next   = devinfo_seq_next,
 480         .stop   = devinfo_seq_stop,
 481         .show   = devinfo_seq_show,
 482 };
 483
 484 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 485 {
 486         return seq_open(file, &scsi_devinfo_seq_ops);
 487 }
 488
 489 /*
 490  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 491  *
 492  * Description: Adds a black/white list entry for vendor and model with an
 493  * integer value of flag to the scsi device info list.
 494  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 495  */
 496 static ssize_t proc_scsi_devinfo_write(struct file *file,
 497                                        const char __user *buf,
 498                                        size_t length, loff_t *ppos)
 499 {
 500         char *buffer;
 501         ssize_t err = length;
 502
 503         if (!buf || length>PAGE_SIZE)
 504                 return -EINVAL;
 505         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 506                 return -ENOMEM;
 507         if (copy_from_user(buffer, buf, length)) {
 508                 err =-EFAULT;
 509                 goto out;
 510         }
 511
 512         if (length < PAGE_SIZE)
 513                 buffer[length] = '\0';
 514         else if (buffer[PAGE_SIZE-1]) {
 515                 err = -EINVAL;
 516                 goto out;
 517         }
 518
 519         scsi_dev_info_list_add_str(buffer);
 520
 521 out:
 522         free_page((unsigned long)buffer);
 523         return err;
 524 }
 525
 526 static const struct file_operations scsi_devinfo_proc_fops = {
 527         .owner          = THIS_MODULE,
 528         .open           = proc_scsi_devinfo_open,
 529         .read           = seq_read,
 530         .write          = proc_scsi_devinfo_write,
 531         .llseek         = seq_lseek,
 532         .release        = seq_release,
 533 };
 534 #endif /* CONFIG_SCSI_PROC_FS */
 535
 536 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 537 MODULE_PARM_DESC(dev_flags,
 538          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 539          " list entries for vendor and model with an integer value of flags"
 540          " to the scsi device info list");
 541
 542 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 543 MODULE_PARM_DESC(default_dev_flags,
 544                  "scsi default device flag integer value");
 545
 546 /**
 547  * scsi_dev_info_list_delete - called from scsi.c:exit_scsi to remove the scsi_dev_info_list.
 548  **/
 549 void scsi_exit_devinfo(void)
 550 {
 551         struct list_head *lh, *lh_next;
 552         struct scsi_dev_info_list *devinfo;
 553
 554 #ifdef CONFIG_SCSI_PROC_FS
 555         remove_proc_entry("scsi/device_info", NULL);
 556 #endif
 557
 558         list_for_each_safe(lh, lh_next, &scsi_dev_info_list) {
 559                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 560                                      dev_info_list);
 561                 kfree(devinfo);
 562         }
 563 }
 564
 565 /**
 566  * scsi_init_devinfo - set up the dynamic device list.
 567  *
 568  * Description:
 569  *      Add command line entries from scsi_dev_flags, then add
 570  *      scsi_static_device_list entries to the scsi device info list.
 571  */
 572 int __init scsi_init_devinfo(void)
 573 {
 574 #ifdef CONFIG_SCSI_PROC_FS
 575         struct proc_dir_entry *p;
 576 #endif
 577         int error, i;
 578
 579         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 580         if (error)
 581                 return error;
 582
 583         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 584                 error = scsi_dev_info_list_add(1 /* compatibile */,
 585                                 scsi_static_device_list[i].vendor,
 586                                 scsi_static_device_list[i].model,
 587                                 NULL,
 588                                 scsi_static_device_list[i].flags);
 589                 if (error)
 590                         goto out;
 591         }
 592
 593 #ifdef CONFIG_SCSI_PROC_FS
 594         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
 595         if (!p) {
 596                 error = -ENOMEM;
 597                 goto out;
 598         }
 599 #endif /* CONFIG_SCSI_PROC_FS */
 600
 601  out:
 602         if (error)
 603                 scsi_exit_devinfo();
 604         return error;
 605 }