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 #include <linux/slab.h>
  10
  11 #include <scsi/scsi_device.h>
  12 #include <scsi/scsi_devinfo.h>
  13
  14 #include "scsi_priv.h"
  15
  16
  17 /*
  18  * scsi_dev_info_list: structure to hold black/white listed devices.
  19  */
  20 struct scsi_dev_info_list {
  21         struct list_head dev_info_list;
  22         char vendor[8];
  23         char model[16];
  24         unsigned flags;
  25         unsigned compatible; /* for use with scsi_static_device_list entries */
  26 };
  27
  28 struct scsi_dev_info_list_table {
  29         struct list_head node;  /* our node for being on the master list */
  30         struct list_head scsi_dev_info_list; /* head of dev info list */
  31         const char *name;       /* name of list for /proc (NULL for global) */
  32         int key;                /* unique numeric identifier */
  33 };
  34
  35
  36 static const char spaces[] = "                "; /* 16 of them */
  37 static unsigned scsi_default_dev_flags;
  38 static LIST_HEAD(scsi_dev_info_list);
  39 static 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  */
  50 static struct {
  51         char *vendor;
  52         char *model;
  53         char *revision; /* revision known to be bad, unused */
  54         unsigned flags;
  55 } scsi_static_device_list[] __initdata = {
  56         /*
  57          * The following devices are known not to tolerate a lun != 0 scan
  58          * for one reason or another. Some will respond to all luns,
  59          * others will lock up.
  60          */
  61         {"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN},     /* locks up */
  62         {"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN},       /* locks up */
  63         {"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN},       /* locks up */
  64         {"DENON", "DRD-25X", "V", BLIST_NOLUN},                 /* locks up */
  65         {"HITACHI", "DK312C", "CM81", BLIST_NOLUN},     /* responds to all lun */
  66         {"HITACHI", "DK314C", "CR21", BLIST_NOLUN},     /* responds to all lun */
  67         {"IBM", "2104-DU3", NULL, BLIST_NOLUN},         /* locks up */
  68         {"IBM", "2104-TU3", NULL, BLIST_NOLUN},         /* locks up */
  69         {"IMS", "CDD521/10", "2.06", BLIST_NOLUN},      /* locks up */
  70         {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN},     /* locks up */
  71         {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN},     /* locks up */
  72         {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN},   /* locks up */
  73         {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN},     /* locks up */
  74         {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN},     /* locks up */
  75         {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN},    /* responds to all lun */
  76         {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN},      /* responds to all lun */
  77         {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
  78         {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN},    /* responds to all lun */
  79         {"RODIME", "RO3000S", "2.33", BLIST_NOLUN},     /* locks up */
  80         {"SUN", "SENA", NULL, BLIST_NOLUN},             /* responds to all luns */
  81         /*
  82          * The following causes a failed REQUEST SENSE on lun 1 for
  83          * aha152x controller, which causes SCSI code to reset bus.
  84          */
  85         {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
  86         /*
  87          * The following causes a failed REQUEST SENSE on lun 1 for
  88          * aha152x controller, which causes SCSI code to reset bus.
  89          */
  90         {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
  91         {"SEAGATE", "ST296", "921", BLIST_NOLUN},       /* responds to all lun */
  92         {"SEAGATE", "ST1581", "6538", BLIST_NOLUN},     /* responds to all lun */
  93         {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
  94         {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
  95         {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
  96         {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
  97         {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
  98         {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN},   /* locks up */
  99         {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN},       /* locks up */
 100         /*
 101          * The following causes a failed REQUEST SENSE on lun 1 for
 102          * seagate controller, which causes SCSI code to reset bus.
 103          */
 104         {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
 105         {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN},        /* responds to all lun */
 106         /*
 107          * The following causes a failed REQUEST SENSE on lun 1 for
 108          * seagate controller, which causes SCSI code to reset bus.
 109          */
 110         {"HP", "C1750A", "3226", BLIST_NOLUN},          /* scanjet iic */
 111         {"HP", "C1790A", "", BLIST_NOLUN},              /* scanjet iip */
 112         {"HP", "C2500A", "", BLIST_NOLUN},              /* scanjet iicx */
 113         {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
 114         {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN},      /* responds to all lun */
 115         {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN},     /* locks up */
 116         {"NEC", "D3856", "0009", BLIST_NOLUN},
 117         {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN},    /* locks up */
 118         {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN},    /* locks up */
 119         {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN},    /* locks up */
 120         {"RELISYS", "Scorpio", NULL, BLIST_NOLUN},      /* responds to all lun */
 121         {"SANKYO", "CP525", "6.64", BLIST_NOLUN},       /* causes failed REQ SENSE, extra reset */
 122         {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
 123         {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
 124         {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN},      /* locks up */
 125         {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN},      /* locks up */
 126         {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN},     /* locks up */
 127         {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN},    /* locks up */
 128         {"", "Scanner", "1.80", BLIST_NOLUN},   /* responds to all lun */
 129
 130         /*
 131          * Other types of devices that have special flags.
 132          * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
 133          */
 134         {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
 135         {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
 136         {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
 137         {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
 138         {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_FORCELUN | BLIST_INQUIRY_36},
 139         {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
 140         {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
 141         {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
 142         {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
 143         {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
 144         {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
 145         {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
 146         {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
 147                 BLIST_MAX_512 | BLIST_REPORTLUN2},      /* Compaq RA4x00 */
 148         {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
 149         {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
 150         {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 151         {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 152         {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 153         {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
 154         {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 155         {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
 156         {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
 157         {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
 158         {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
 159         {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
 160         {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
 161         {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
 162         {"EMC",  "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 163         {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
 164         {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
 165         {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
 166         {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
 167         {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
 168         {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 169         {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
 170         {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
 171         {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
 172         {"HITACHI", "DF400", "*", BLIST_REPORTLUN2},
 173         {"HITACHI", "DF500", "*", BLIST_REPORTLUN2},
 174         {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
 175         {"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2},
 176         {"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 177         {"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 178         {"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 179         {"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 180         {"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 181         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 182         {"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
 183         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 184         {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 185         {"HP", "C1557A", NULL, BLIST_FORCELUN},
 186         {"HP", "C3323-300", "4269", BLIST_NOTQ},
 187         {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
 188         {"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 189         {"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 190         {"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 191         {"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 192         {"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 193         {"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 194         {"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 195         {"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 196         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 197         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 198         {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
 199         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 200         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 201         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 202         {"INSITE", "I325VM", NULL, BLIST_KEY},
 203         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 204         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 205         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 206         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 207         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 208         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 209         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 210         {"MICROP", "4110", NULL, BLIST_NOTQ},
 211         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 212         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 213         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 214         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 215         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 216         {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 217         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 218         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 219         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 220         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 221         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 222         {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 223         {"Promise", "", NULL, BLIST_SPARSELUN},
 224         {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 225         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 226         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 227         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 228         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 229         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 230         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 231         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 232         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 233         {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 234         {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 235         {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 236         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 237         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 238         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 239         {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 240         {"SUN", "T300", "*", BLIST_SPARSELUN},
 241         {"SUN", "T4", "*", BLIST_SPARSELUN},
 242         {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
 243         {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 244         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 245         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 246         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 247         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 248         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 249         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 250         {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 251         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 252         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 253         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 254         { NULL, NULL, NULL, 0 },
 255 };
 256
 257 static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
 258 {
 259         struct scsi_dev_info_list_table *devinfo_table;
 260         int found = 0;
 261
 262         list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
 263                 if (devinfo_table->key == key) {
 264                         found = 1;
 265                         break;
 266                 }
 267         if (!found)
 268                 return ERR_PTR(-EINVAL);
 269
 270         return devinfo_table;
 271 }
 272
 273 /*
 274  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 275  * devinfo vendor and model strings.
 276  */
 277 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 278                                 char *from, int compatible)
 279 {
 280         size_t from_length;
 281
 282         from_length = strlen(from);
 283         strncpy(to, from, min(to_length, from_length));
 284         if (from_length < to_length) {
 285                 if (compatible) {
 286                         /*
 287                          * NUL terminate the string if it is short.
 288                          */
 289                         to[from_length] = '\0';
 290                 } else {
 291                         /*
 292                          * space pad the string if it is short.
 293                          */
 294                         strncpy(&to[from_length], spaces,
 295                                 to_length - from_length);
 296                 }
 297         }
 298         if (from_length > to_length)
 299                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 300                         __func__, name, from);
 301 }
 302
 303 /**
 304  * scsi_dev_info_list_add - add one dev_info list entry.
 305  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 306  * @vendor:     vendor string
 307  * @model:      model (product) string
 308  * @strflags:   integer string
 309  * @flags:      if strflags NULL, use this flag value
 310  *
 311  * Description:
 312  *      Create and add one dev_info entry for @vendor, @model, @strflags or
 313  *      @flag. If @compatible, add to the tail of the list, do not space
 314  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 315  *      are added with @compatible 1 and @clfags NULL.
 316  *
 317  * Returns: 0 OK, -error on failure.
 318  **/
 319 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 320                             char *strflags, int flags)
 321 {
 322         return scsi_dev_info_list_add_keyed(compatible, vendor, model,
 323                                             strflags, flags,
 324                                             SCSI_DEVINFO_GLOBAL);
 325 }
 326
 327 /**
 328  * scsi_dev_info_list_add_keyed - add one dev_info list entry.
 329  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 330  * @vendor:     vendor string
 331  * @model:      model (product) string
 332  * @strflags:   integer string
 333  * @flags:      if strflags NULL, use this flag value
 334  * @key:        specify list to use
 335  *
 336  * Description:
 337  *      Create and add one dev_info entry for @vendor, @model,
 338  *      @strflags or @flag in list specified by @key. If @compatible,
 339  *      add to the tail of the list, do not space pad, and set
 340  *      devinfo->compatible. The scsi_static_device_list entries are
 341  *      added with @compatible 1 and @clfags NULL.
 342  *
 343  * Returns: 0 OK, -error on failure.
 344  **/
 345 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
 346                                  char *strflags, int flags, int key)
 347 {
 348         struct scsi_dev_info_list *devinfo;
 349         struct scsi_dev_info_list_table *devinfo_table =
 350                 scsi_devinfo_lookup_by_key(key);
 351
 352         if (IS_ERR(devinfo_table))
 353                 return PTR_ERR(devinfo_table);
 354
 355         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 356         if (!devinfo) {
 357                 printk(KERN_ERR "%s: no memory\n", __func__);
 358                 return -ENOMEM;
 359         }
 360
 361         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 362                             vendor, compatible);
 363         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 364                             model, compatible);
 365
 366         if (strflags)
 367                 devinfo->flags = simple_strtoul(strflags, NULL, 0);
 368         else
 369                 devinfo->flags = flags;
 370
 371         devinfo->compatible = compatible;
 372
 373         if (compatible)
 374                 list_add_tail(&devinfo->dev_info_list,
 375                               &devinfo_table->scsi_dev_info_list);
 376         else
 377                 list_add(&devinfo->dev_info_list,
 378                          &devinfo_table->scsi_dev_info_list);
 379
 380         return 0;
 381 }
 382 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
 383
 384 /**
 385  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 386  * @dev_list:   string of device flags to add
 387  *
 388  * Description:
 389  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 390  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 391  *      dev_list is modified via strsep. Can be called for command line
 392  *      addition, for proc or mabye a sysfs interface.
 393  *
 394  * Returns: 0 if OK, -error on failure.
 395  **/
 396 static int scsi_dev_info_list_add_str(char *dev_list)
 397 {
 398         char *vendor, *model, *strflags, *next;
 399         char *next_check;
 400         int res = 0;
 401
 402         next = dev_list;
 403         if (next && next[0] == '"') {
 404                 /*
 405                  * Ignore both the leading and trailing quote.
 406                  */
 407                 next++;
 408                 next_check = ",\"";
 409         } else {
 410                 next_check = ",";
 411         }
 412
 413         /*
 414          * For the leading and trailing '"' case, the for loop comes
 415          * through the last time with vendor[0] == '\0'.
 416          */
 417         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 418              && (res == 0); vendor = strsep(&next, ":")) {
 419                 strflags = NULL;
 420                 model = strsep(&next, ":");
 421                 if (model)
 422                         strflags = strsep(&next, next_check);
 423                 if (!model || !strflags) {
 424                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 425                                " '%s'\n", __func__, vendor, model,
 426                                strflags);
 427                         res = -EINVAL;
 428                 } else
 429                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 430                                                      model, strflags, 0);
 431         }
 432         return res;
 433 }
 434
 435 /**
 436  * get_device_flags - get device specific flags from the dynamic device list.
 437  * @sdev:       &scsi_device to get flags for
 438  * @vendor:     vendor name
 439  * @model:      model name
 440  *
 441  * Description:
 442  *     Search the global scsi_dev_info_list (specified by list zero)
 443  *     for an entry matching @vendor and @model, if found, return the
 444  *     matching flags value, else return the host or global default
 445  *     settings.  Called during scan time.
 446  **/
 447 int scsi_get_device_flags(struct scsi_device *sdev,
 448                           const unsigned char *vendor,
 449                           const unsigned char *model)
 450 {
 451         return scsi_get_device_flags_keyed(sdev, vendor, model,
 452                                            SCSI_DEVINFO_GLOBAL);
 453 }
 454
 455
 456 /**
 457  * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
 458  * @sdev:       &scsi_device to get flags for
 459  * @vendor:     vendor name
 460  * @model:      model name
 461  * @key:        list to look up
 462  *
 463  * Description:
 464  *     Search the scsi_dev_info_list specified by @key for an entry
 465  *     matching @vendor and @model, if found, return the matching
 466  *     flags value, else return the host or global default settings.
 467  *     Called during scan time.
 468  **/
 469 int scsi_get_device_flags_keyed(struct scsi_device *sdev,
 470                                 const unsigned char *vendor,
 471                                 const unsigned char *model,
 472                                 int key)
 473 {
 474         struct scsi_dev_info_list *devinfo;
 475         struct scsi_dev_info_list_table *devinfo_table;
 476
 477         devinfo_table = scsi_devinfo_lookup_by_key(key);
 478
 479         if (IS_ERR(devinfo_table))
 480                 return PTR_ERR(devinfo_table);
 481
 482         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 483                             dev_info_list) {
 484                 if (devinfo->compatible) {
 485                         /*
 486                          * Behave like the older version of get_device_flags.
 487                          */
 488                         size_t max;
 489                         /*
 490                          * XXX why skip leading spaces? If an odd INQUIRY
 491                          * value, that should have been part of the
 492                          * scsi_static_device_list[] entry, such as "  FOO"
 493                          * rather than "FOO". Since this code is already
 494                          * here, and we don't know what device it is
 495                          * trying to work with, leave it as-is.
 496                          */
 497                         max = 8;        /* max length of vendor */
 498                         while ((max > 0) && *vendor == ' ') {
 499                                 max--;
 500                                 vendor++;
 501                         }
 502                         /*
 503                          * XXX removing the following strlen() would be
 504                          * good, using it means that for a an entry not in
 505                          * the list, we scan every byte of every vendor
 506                          * listed in scsi_static_device_list[], and never match
 507                          * a single one (and still have to compare at
 508                          * least the first byte of each vendor).
 509                          */
 510                         if (memcmp(devinfo->vendor, vendor,
 511                                     min(max, strlen(devinfo->vendor))))
 512                                 continue;
 513                         /*
 514                          * Skip spaces again.
 515                          */
 516                         max = 16;       /* max length of model */
 517                         while ((max > 0) && *model == ' ') {
 518                                 max--;
 519                                 model++;
 520                         }
 521                         if (memcmp(devinfo->model, model,
 522                                    min(max, strlen(devinfo->model))))
 523                                 continue;
 524                         return devinfo->flags;
 525                 } else {
 526                         if (!memcmp(devinfo->vendor, vendor,
 527                                      sizeof(devinfo->vendor)) &&
 528                              !memcmp(devinfo->model, model,
 529                                       sizeof(devinfo->model)))
 530                                 return devinfo->flags;
 531                 }
 532         }
 533         /* nothing found, return nothing */
 534         if (key != SCSI_DEVINFO_GLOBAL)
 535                 return 0;
 536
 537         /* except for the global list, where we have an exception */
 538         if (sdev->sdev_bflags)
 539                 return sdev->sdev_bflags;
 540
 541         return scsi_default_dev_flags;
 542 }
 543 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
 544
 545 #ifdef CONFIG_SCSI_PROC_FS
 546 struct double_list {
 547         struct list_head *top;
 548         struct list_head *bottom;
 549 };
 550
 551 static int devinfo_seq_show(struct seq_file *m, void *v)
 552 {
 553         struct double_list *dl = v;
 554         struct scsi_dev_info_list_table *devinfo_table =
 555                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 556         struct scsi_dev_info_list *devinfo =
 557                 list_entry(dl->bottom, struct scsi_dev_info_list,
 558                            dev_info_list);
 559
 560         if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
 561             devinfo_table->name)
 562                 seq_printf(m, "[%s]:\n", devinfo_table->name);
 563
 564         seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
 565                    devinfo->vendor, devinfo->model, devinfo->flags);
 566         return 0;
 567 }
 568
 569 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
 570 {
 571         struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
 572         loff_t pos = *ppos;
 573
 574         if (!dl)
 575                 return NULL;
 576
 577         list_for_each(dl->top, &scsi_dev_info_list) {
 578                 struct scsi_dev_info_list_table *devinfo_table =
 579                         list_entry(dl->top, struct scsi_dev_info_list_table,
 580                                    node);
 581                 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
 582                         if (pos-- == 0)
 583                                 return dl;
 584         }
 585
 586         kfree(dl);
 587         return NULL;
 588 }
 589
 590 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
 591 {
 592         struct double_list *dl = v;
 593         struct scsi_dev_info_list_table *devinfo_table =
 594                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 595
 596         ++*ppos;
 597         dl->bottom = dl->bottom->next;
 598         while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
 599                 dl->top = dl->top->next;
 600                 if (dl->top == &scsi_dev_info_list) {
 601                         kfree(dl);
 602                         return NULL;
 603                 }
 604                 devinfo_table = list_entry(dl->top,
 605                                            struct scsi_dev_info_list_table,
 606                                            node);
 607                 dl->bottom = devinfo_table->scsi_dev_info_list.next;
 608         }
 609
 610         return dl;
 611 }
 612
 613 static void devinfo_seq_stop(struct seq_file *m, void *v)
 614 {
 615         kfree(v);
 616 }
 617
 618 static const struct seq_operations scsi_devinfo_seq_ops = {
 619         .start  = devinfo_seq_start,
 620         .next   = devinfo_seq_next,
 621         .stop   = devinfo_seq_stop,
 622         .show   = devinfo_seq_show,
 623 };
 624
 625 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 626 {
 627         return seq_open(file, &scsi_devinfo_seq_ops);
 628 }
 629
 630 /*
 631  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 632  *
 633  * Description: Adds a black/white list entry for vendor and model with an
 634  * integer value of flag to the scsi device info list.
 635  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 636  */
 637 static ssize_t proc_scsi_devinfo_write(struct file *file,
 638                                        const char __user *buf,
 639                                        size_t length, loff_t *ppos)
 640 {
 641         char *buffer;
 642         ssize_t err = length;
 643
 644         if (!buf || length>PAGE_SIZE)
 645                 return -EINVAL;
 646         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 647                 return -ENOMEM;
 648         if (copy_from_user(buffer, buf, length)) {
 649                 err =-EFAULT;
 650                 goto out;
 651         }
 652
 653         if (length < PAGE_SIZE)
 654                 buffer[length] = '\0';
 655         else if (buffer[PAGE_SIZE-1]) {
 656                 err = -EINVAL;
 657                 goto out;
 658         }
 659
 660         scsi_dev_info_list_add_str(buffer);
 661
 662 out:
 663         free_page((unsigned long)buffer);
 664         return err;
 665 }
 666
 667 static const struct file_operations scsi_devinfo_proc_fops = {
 668         .owner          = THIS_MODULE,
 669         .open           = proc_scsi_devinfo_open,
 670         .read           = seq_read,
 671         .write          = proc_scsi_devinfo_write,
 672         .llseek         = seq_lseek,
 673         .release        = seq_release,
 674 };
 675 #endif /* CONFIG_SCSI_PROC_FS */
 676
 677 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 678 MODULE_PARM_DESC(dev_flags,
 679          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 680          " list entries for vendor and model with an integer value of flags"
 681          " to the scsi device info list");
 682
 683 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 684 MODULE_PARM_DESC(default_dev_flags,
 685                  "scsi default device flag integer value");
 686
 687 /**
 688  * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 689  **/
 690 void scsi_exit_devinfo(void)
 691 {
 692 #ifdef CONFIG_SCSI_PROC_FS
 693         remove_proc_entry("scsi/device_info", NULL);
 694 #endif
 695
 696         scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 697 }
 698
 699 /**
 700  * scsi_dev_info_add_list - add a new devinfo list
 701  * @key:        key of the list to add
 702  * @name:       Name of the list to add (for /proc/scsi/device_info)
 703  *
 704  * Adds the requested list, returns zero on success, -EEXIST if the
 705  * key is already registered to a list, or other error on failure.
 706  */
 707 int scsi_dev_info_add_list(int key, const char *name)
 708 {
 709         struct scsi_dev_info_list_table *devinfo_table =
 710                 scsi_devinfo_lookup_by_key(key);
 711
 712         if (!IS_ERR(devinfo_table))
 713                 /* list already exists */
 714                 return -EEXIST;
 715
 716         devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 717
 718         if (!devinfo_table)
 719                 return -ENOMEM;
 720
 721         INIT_LIST_HEAD(&devinfo_table->node);
 722         INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 723         devinfo_table->name = name;
 724         devinfo_table->key = key;
 725         list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 726
 727         return 0;
 728 }
 729 EXPORT_SYMBOL(scsi_dev_info_add_list);
 730
 731 /**
 732  * scsi_dev_info_remove_list - destroy an added devinfo list
 733  * @key: key of the list to destroy
 734  *
 735  * Iterates over the entire list first, freeing all the values, then
 736  * frees the list itself.  Returns 0 on success or -EINVAL if the key
 737  * can't be found.
 738  */
 739 int scsi_dev_info_remove_list(int key)
 740 {
 741         struct list_head *lh, *lh_next;
 742         struct scsi_dev_info_list_table *devinfo_table =
 743                 scsi_devinfo_lookup_by_key(key);
 744
 745         if (IS_ERR(devinfo_table))
 746                 /* no such list */
 747                 return -EINVAL;
 748
 749         /* remove from the master list */
 750         list_del(&devinfo_table->node);
 751
 752         list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 753                 struct scsi_dev_info_list *devinfo;
 754
 755                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 756                                      dev_info_list);
 757                 kfree(devinfo);
 758         }
 759         kfree(devinfo_table);
 760
 761         return 0;
 762 }
 763 EXPORT_SYMBOL(scsi_dev_info_remove_list);
 764
 765 /**
 766  * scsi_init_devinfo - set up the dynamic device list.
 767  *
 768  * Description:
 769  *      Add command line entries from scsi_dev_flags, then add
 770  *      scsi_static_device_list entries to the scsi device info list.
 771  */
 772 int __init scsi_init_devinfo(void)
 773 {
 774 #ifdef CONFIG_SCSI_PROC_FS
 775         struct proc_dir_entry *p;
 776 #endif
 777         int error, i;
 778
 779         error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 780         if (error)
 781                 return error;
 782
 783         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 784         if (error)
 785                 goto out;
 786
 787         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 788                 error = scsi_dev_info_list_add(1 /* compatibile */,
 789                                 scsi_static_device_list[i].vendor,
 790                                 scsi_static_device_list[i].model,
 791                                 NULL,
 792                                 scsi_static_device_list[i].flags);
 793                 if (error)
 794                         goto out;
 795         }
 796
 797 #ifdef CONFIG_SCSI_PROC_FS
 798         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
 799         if (!p) {
 800                 error = -ENOMEM;
 801                 goto out;
 802         }
 803 #endif /* CONFIG_SCSI_PROC_FS */
 804
 805  out:
 806         if (error)
 807                 scsi_exit_devinfo();
 808         return error;
 809 }