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 struct scsi_dev_info_list_table {
  28         struct list_head node;  /* our node for being on the master list */
  29         struct list_head scsi_dev_info_list; /* head of dev info list */
  30         const char *name;       /* name of list for /proc (NULL for global) */
  31         int key;                /* unique numeric identifier */
  32 };
  33
  34
  35 static const char spaces[] = "                "; /* 16 of them */
  36 static unsigned scsi_default_dev_flags;
  37 static LIST_HEAD(scsi_dev_info_list);
  38 static char scsi_dev_flags[256];
  39
  40 /*
  41  * scsi_static_device_list: deprecated list of devices that require
  42  * settings that differ from the default, includes black-listed (broken)
  43  * devices. The entries here are added to the tail of scsi_dev_info_list
  44  * via scsi_dev_info_list_init.
  45  *
  46  * Do not add to this list, use the command line or proc interface to add
  47  * to the scsi_dev_info_list. This table will eventually go away.
  48  */
  49 static struct {
  50         char *vendor;
  51         char *model;
  52         char *revision; /* revision known to be bad, unused */
  53         unsigned flags;
  54 } scsi_static_device_list[] __initdata = {
  55         /*
  56          * The following devices are known not to tolerate a lun != 0 scan
  57          * for one reason or another. Some will respond to all luns,
  58          * others will lock up.
  59          */
  60         {"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN},     /* locks up */
  61         {"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN},       /* locks up */
  62         {"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN},       /* locks up */
  63         {"DENON", "DRD-25X", "V", BLIST_NOLUN},                 /* locks up */
  64         {"HITACHI", "DK312C", "CM81", BLIST_NOLUN},     /* responds to all lun */
  65         {"HITACHI", "DK314C", "CR21", BLIST_NOLUN},     /* responds to all lun */
  66         {"IBM", "2104-DU3", NULL, BLIST_NOLUN},         /* locks up */
  67         {"IBM", "2104-TU3", NULL, BLIST_NOLUN},         /* locks up */
  68         {"IMS", "CDD521/10", "2.06", BLIST_NOLUN},      /* locks up */
  69         {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN},     /* locks up */
  70         {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN},     /* locks up */
  71         {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN},   /* locks up */
  72         {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN},     /* locks up */
  73         {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN},     /* locks up */
  74         {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN},    /* responds to all lun */
  75         {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN},      /* responds to all lun */
  76         {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
  77         {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN},    /* responds to all lun */
  78         {"RODIME", "RO3000S", "2.33", BLIST_NOLUN},     /* locks up */
  79         {"SUN", "SENA", NULL, BLIST_NOLUN},             /* responds to all luns */
  80         /*
  81          * The following causes a failed REQUEST SENSE on lun 1 for
  82          * aha152x controller, which causes SCSI code to reset bus.
  83          */
  84         {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
  85         /*
  86          * The following causes a failed REQUEST SENSE on lun 1 for
  87          * aha152x controller, which causes SCSI code to reset bus.
  88          */
  89         {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
  90         {"SEAGATE", "ST296", "921", BLIST_NOLUN},       /* responds to all lun */
  91         {"SEAGATE", "ST1581", "6538", BLIST_NOLUN},     /* responds to all lun */
  92         {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
  93         {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
  94         {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
  95         {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
  96         {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
  97         {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN},   /* locks up */
  98         {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN},       /* locks up */
  99         /*
 100          * The following causes a failed REQUEST SENSE on lun 1 for
 101          * seagate controller, which causes SCSI code to reset bus.
 102          */
 103         {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
 104         {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN},        /* responds to all lun */
 105         /*
 106          * The following causes a failed REQUEST SENSE on lun 1 for
 107          * seagate controller, which causes SCSI code to reset bus.
 108          */
 109         {"HP", "C1750A", "3226", BLIST_NOLUN},          /* scanjet iic */
 110         {"HP", "C1790A", "", BLIST_NOLUN},              /* scanjet iip */
 111         {"HP", "C2500A", "", BLIST_NOLUN},              /* scanjet iicx */
 112         {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
 113         {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN},      /* responds to all lun */
 114         {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN},     /* locks up */
 115         {"NEC", "D3856", "0009", BLIST_NOLUN},
 116         {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN},    /* locks up */
 117         {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN},    /* locks up */
 118         {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN},    /* locks up */
 119         {"RELISYS", "Scorpio", NULL, BLIST_NOLUN},      /* responds to all lun */
 120         {"SANKYO", "CP525", "6.64", BLIST_NOLUN},       /* causes failed REQ SENSE, extra reset */
 121         {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
 122         {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
 123         {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN},      /* locks up */
 124         {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN},      /* locks up */
 125         {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN},     /* locks up */
 126         {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN},    /* locks up */
 127         {"", "Scanner", "1.80", BLIST_NOLUN},   /* responds to all lun */
 128
 129         /*
 130          * Other types of devices that have special flags.
 131          * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
 132          */
 133         {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
 134         {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
 135         {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
 136         {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
 137         {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_FORCELUN | BLIST_INQUIRY_36},
 138         {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
 139         {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
 140         {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
 141         {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
 142         {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
 143         {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
 144         {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
 145         {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
 146                 BLIST_MAX_512 | BLIST_REPORTLUN2},      /* Compaq RA4x00 */
 147         {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
 148         {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
 149         {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 150         {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 151         {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 152         {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
 153         {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 154         {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
 155         {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
 156         {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
 157         {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
 158         {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
 159         {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
 160         {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
 161         {"EMC",  "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 162         {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
 163         {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
 164         {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
 165         {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
 166         {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
 167         {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 168         {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
 169         {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
 170         {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
 171         {"HITACHI", "DF400", "*", BLIST_REPORTLUN2},
 172         {"HITACHI", "DF500", "*", BLIST_REPORTLUN2},
 173         {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
 174         {"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2},
 175         {"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 176         {"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 177         {"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 178         {"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 179         {"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 180         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 181         {"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
 182         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 183         {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 184         {"HP", "C1557A", NULL, BLIST_FORCELUN},
 185         {"HP", "C3323-300", "4269", BLIST_NOTQ},
 186         {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
 187         {"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 188         {"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 189         {"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 190         {"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 191         {"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 192         {"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 193         {"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 194         {"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 195         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 196         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 197         {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
 198         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 199         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 200         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 201         {"INSITE", "I325VM", NULL, BLIST_KEY},
 202         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 203         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 204         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 205         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 206         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 207         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 208         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 209         {"MICROP", "4110", NULL, BLIST_NOTQ},
 210         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 211         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 212         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 213         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 214         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 215         {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 216         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 217         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 218         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 219         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 220         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 221         {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 222         {"Promise", "", NULL, BLIST_SPARSELUN},
 223         {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 224         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 225         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 226         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 227         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 228         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 229         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 230         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 231         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 232         {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 233         {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 234         {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 235         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 236         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 237         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 238         {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 239         {"SUN", "T300", "*", BLIST_SPARSELUN},
 240         {"SUN", "T4", "*", BLIST_SPARSELUN},
 241         {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
 242         {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 243         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 244         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 245         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 246         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 247         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 248         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 249         {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 250         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 251         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 252         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 253         { NULL, NULL, NULL, 0 },
 254 };
 255
 256 static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
 257 {
 258         struct scsi_dev_info_list_table *devinfo_table;
 259         int found = 0;
 260
 261         list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
 262                 if (devinfo_table->key == key) {
 263                         found = 1;
 264                         break;
 265                 }
 266         if (!found)
 267                 return ERR_PTR(-EINVAL);
 268
 269         return devinfo_table;
 270 }
 271
 272 /*
 273  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 274  * devinfo vendor and model strings.
 275  */
 276 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 277                                 char *from, int compatible)
 278 {
 279         size_t from_length;
 280
 281         from_length = strlen(from);
 282         strncpy(to, from, min(to_length, from_length));
 283         if (from_length < to_length) {
 284                 if (compatible) {
 285                         /*
 286                          * NUL terminate the string if it is short.
 287                          */
 288                         to[from_length] = '\0';
 289                 } else {
 290                         /*
 291                          * space pad the string if it is short.
 292                          */
 293                         strncpy(&to[from_length], spaces,
 294                                 to_length - from_length);
 295                 }
 296         }
 297         if (from_length > to_length)
 298                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 299                         __func__, name, from);
 300 }
 301
 302 /**
 303  * scsi_dev_info_list_add - add one dev_info list entry.
 304  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 305  * @vendor:     vendor string
 306  * @model:      model (product) string
 307  * @strflags:   integer string
 308  * @flags:      if strflags NULL, use this flag value
 309  *
 310  * Description:
 311  *      Create and add one dev_info entry for @vendor, @model, @strflags or
 312  *      @flag. If @compatible, add to the tail of the list, do not space
 313  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 314  *      are added with @compatible 1 and @clfags NULL.
 315  *
 316  * Returns: 0 OK, -error on failure.
 317  **/
 318 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 319                             char *strflags, int flags)
 320 {
 321         return scsi_dev_info_list_add_keyed(compatible, vendor, model,
 322                                             strflags, flags,
 323                                             SCSI_DEVINFO_GLOBAL);
 324 }
 325
 326 /**
 327  * scsi_dev_info_list_add_keyed - add one dev_info list entry.
 328  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 329  * @vendor:     vendor string
 330  * @model:      model (product) string
 331  * @strflags:   integer string
 332  * @flags:      if strflags NULL, use this flag value
 333  * @key:        specify list to use
 334  *
 335  * Description:
 336  *      Create and add one dev_info entry for @vendor, @model,
 337  *      @strflags or @flag in list specified by @key. If @compatible,
 338  *      add to the tail of the list, do not space pad, and set
 339  *      devinfo->compatible. The scsi_static_device_list entries are
 340  *      added with @compatible 1 and @clfags NULL.
 341  *
 342  * Returns: 0 OK, -error on failure.
 343  **/
 344 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
 345                                  char *strflags, int flags, int key)
 346 {
 347         struct scsi_dev_info_list *devinfo;
 348         struct scsi_dev_info_list_table *devinfo_table =
 349                 scsi_devinfo_lookup_by_key(key);
 350
 351         if (IS_ERR(devinfo_table))
 352                 return PTR_ERR(devinfo_table);
 353
 354         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 355         if (!devinfo) {
 356                 printk(KERN_ERR "%s: no memory\n", __func__);
 357                 return -ENOMEM;
 358         }
 359
 360         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 361                             vendor, compatible);
 362         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 363                             model, compatible);
 364
 365         if (strflags)
 366                 devinfo->flags = simple_strtoul(strflags, NULL, 0);
 367         else
 368                 devinfo->flags = flags;
 369
 370         devinfo->compatible = compatible;
 371
 372         if (compatible)
 373                 list_add_tail(&devinfo->dev_info_list,
 374                               &devinfo_table->scsi_dev_info_list);
 375         else
 376                 list_add(&devinfo->dev_info_list,
 377                          &devinfo_table->scsi_dev_info_list);
 378
 379         return 0;
 380 }
 381 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
 382
 383 /**
 384  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 385  * @dev_list:   string of device flags to add
 386  *
 387  * Description:
 388  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 389  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 390  *      dev_list is modified via strsep. Can be called for command line
 391  *      addition, for proc or mabye a sysfs interface.
 392  *
 393  * Returns: 0 if OK, -error on failure.
 394  **/
 395 static int scsi_dev_info_list_add_str(char *dev_list)
 396 {
 397         char *vendor, *model, *strflags, *next;
 398         char *next_check;
 399         int res = 0;
 400
 401         next = dev_list;
 402         if (next && next[0] == '"') {
 403                 /*
 404                  * Ignore both the leading and trailing quote.
 405                  */
 406                 next++;
 407                 next_check = ",\"";
 408         } else {
 409                 next_check = ",";
 410         }
 411
 412         /*
 413          * For the leading and trailing '"' case, the for loop comes
 414          * through the last time with vendor[0] == '\0'.
 415          */
 416         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 417              && (res == 0); vendor = strsep(&next, ":")) {
 418                 strflags = NULL;
 419                 model = strsep(&next, ":");
 420                 if (model)
 421                         strflags = strsep(&next, next_check);
 422                 if (!model || !strflags) {
 423                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 424                                " '%s'\n", __func__, vendor, model,
 425                                strflags);
 426                         res = -EINVAL;
 427                 } else
 428                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 429                                                      model, strflags, 0);
 430         }
 431         return res;
 432 }
 433
 434 /**
 435  * get_device_flags - get device specific flags from the dynamic device list.
 436  * @sdev:       &scsi_device to get flags for
 437  * @vendor:     vendor name
 438  * @model:      model name
 439  *
 440  * Description:
 441  *     Search the global scsi_dev_info_list (specified by list zero)
 442  *     for an entry matching @vendor and @model, if found, return the
 443  *     matching flags value, else return the host or global default
 444  *     settings.  Called during scan time.
 445  **/
 446 int scsi_get_device_flags(struct scsi_device *sdev,
 447                           const unsigned char *vendor,
 448                           const unsigned char *model)
 449 {
 450         return scsi_get_device_flags_keyed(sdev, vendor, model,
 451                                            SCSI_DEVINFO_GLOBAL);
 452 }
 453
 454
 455 /**
 456  * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
 457  * @sdev:       &scsi_device to get flags for
 458  * @vendor:     vendor name
 459  * @model:      model name
 460  * @key:        list to look up
 461  *
 462  * Description:
 463  *     Search the scsi_dev_info_list specified by @key for an entry
 464  *     matching @vendor and @model, if found, return the matching
 465  *     flags value, else return the host or global default settings.
 466  *     Called during scan time.
 467  **/
 468 int scsi_get_device_flags_keyed(struct scsi_device *sdev,
 469                                 const unsigned char *vendor,
 470                                 const unsigned char *model,
 471                                 int key)
 472 {
 473         struct scsi_dev_info_list *devinfo;
 474         struct scsi_dev_info_list_table *devinfo_table;
 475
 476         devinfo_table = scsi_devinfo_lookup_by_key(key);
 477
 478         if (IS_ERR(devinfo_table))
 479                 return PTR_ERR(devinfo_table);
 480
 481         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 482                             dev_info_list) {
 483                 if (devinfo->compatible) {
 484                         /*
 485                          * Behave like the older version of get_device_flags.
 486                          */
 487                         size_t max;
 488                         /*
 489                          * XXX why skip leading spaces? If an odd INQUIRY
 490                          * value, that should have been part of the
 491                          * scsi_static_device_list[] entry, such as "  FOO"
 492                          * rather than "FOO". Since this code is already
 493                          * here, and we don't know what device it is
 494                          * trying to work with, leave it as-is.
 495                          */
 496                         max = 8;        /* max length of vendor */
 497                         while ((max > 0) && *vendor == ' ') {
 498                                 max--;
 499                                 vendor++;
 500                         }
 501                         /*
 502                          * XXX removing the following strlen() would be
 503                          * good, using it means that for a an entry not in
 504                          * the list, we scan every byte of every vendor
 505                          * listed in scsi_static_device_list[], and never match
 506                          * a single one (and still have to compare at
 507                          * least the first byte of each vendor).
 508                          */
 509                         if (memcmp(devinfo->vendor, vendor,
 510                                     min(max, strlen(devinfo->vendor))))
 511                                 continue;
 512                         /*
 513                          * Skip spaces again.
 514                          */
 515                         max = 16;       /* max length of model */
 516                         while ((max > 0) && *model == ' ') {
 517                                 max--;
 518                                 model++;
 519                         }
 520                         if (memcmp(devinfo->model, model,
 521                                    min(max, strlen(devinfo->model))))
 522                                 continue;
 523                         return devinfo->flags;
 524                 } else {
 525                         if (!memcmp(devinfo->vendor, vendor,
 526                                      sizeof(devinfo->vendor)) &&
 527                              !memcmp(devinfo->model, model,
 528                                       sizeof(devinfo->model)))
 529                                 return devinfo->flags;
 530                 }
 531         }
 532         /* nothing found, return nothing */
 533         if (key != SCSI_DEVINFO_GLOBAL)
 534                 return 0;
 535
 536         /* except for the global list, where we have an exception */
 537         if (sdev->sdev_bflags)
 538                 return sdev->sdev_bflags;
 539
 540         return scsi_default_dev_flags;
 541 }
 542 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
 543
 544 #ifdef CONFIG_SCSI_PROC_FS
 545 struct double_list {
 546         struct list_head *top;
 547         struct list_head *bottom;
 548 };
 549
 550 static int devinfo_seq_show(struct seq_file *m, void *v)
 551 {
 552         struct double_list *dl = v;
 553         struct scsi_dev_info_list_table *devinfo_table =
 554                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 555         struct scsi_dev_info_list *devinfo =
 556                 list_entry(dl->bottom, struct scsi_dev_info_list,
 557                            dev_info_list);
 558
 559         if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
 560             devinfo_table->name)
 561                 seq_printf(m, "[%s]:\n", devinfo_table->name);
 562
 563         seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
 564                    devinfo->vendor, devinfo->model, devinfo->flags);
 565         return 0;
 566 }
 567
 568 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
 569 {
 570         struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
 571         loff_t pos = *ppos;
 572
 573         if (!dl)
 574                 return NULL;
 575
 576         list_for_each(dl->top, &scsi_dev_info_list) {
 577                 struct scsi_dev_info_list_table *devinfo_table =
 578                         list_entry(dl->top, struct scsi_dev_info_list_table,
 579                                    node);
 580                 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
 581                         if (pos-- == 0)
 582                                 return dl;
 583         }
 584
 585         kfree(dl);
 586         return NULL;
 587 }
 588
 589 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
 590 {
 591         struct double_list *dl = v;
 592         struct scsi_dev_info_list_table *devinfo_table =
 593                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 594
 595         ++*ppos;
 596         dl->bottom = dl->bottom->next;
 597         while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
 598                 dl->top = dl->top->next;
 599                 if (dl->top == &scsi_dev_info_list) {
 600                         kfree(dl);
 601                         return NULL;
 602                 }
 603                 devinfo_table = list_entry(dl->top,
 604                                            struct scsi_dev_info_list_table,
 605                                            node);
 606                 dl->bottom = devinfo_table->scsi_dev_info_list.next;
 607         }
 608
 609         return dl;
 610 }
 611
 612 static void devinfo_seq_stop(struct seq_file *m, void *v)
 613 {
 614         kfree(v);
 615 }
 616
 617 static const struct seq_operations scsi_devinfo_seq_ops = {
 618         .start  = devinfo_seq_start,
 619         .next   = devinfo_seq_next,
 620         .stop   = devinfo_seq_stop,
 621         .show   = devinfo_seq_show,
 622 };
 623
 624 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 625 {
 626         return seq_open(file, &scsi_devinfo_seq_ops);
 627 }
 628
 629 /*
 630  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 631  *
 632  * Description: Adds a black/white list entry for vendor and model with an
 633  * integer value of flag to the scsi device info list.
 634  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 635  */
 636 static ssize_t proc_scsi_devinfo_write(struct file *file,
 637                                        const char __user *buf,
 638                                        size_t length, loff_t *ppos)
 639 {
 640         char *buffer;
 641         ssize_t err = length;
 642
 643         if (!buf || length>PAGE_SIZE)
 644                 return -EINVAL;
 645         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 646                 return -ENOMEM;
 647         if (copy_from_user(buffer, buf, length)) {
 648                 err =-EFAULT;
 649                 goto out;
 650         }
 651
 652         if (length < PAGE_SIZE)
 653                 buffer[length] = '\0';
 654         else if (buffer[PAGE_SIZE-1]) {
 655                 err = -EINVAL;
 656                 goto out;
 657         }
 658
 659         scsi_dev_info_list_add_str(buffer);
 660
 661 out:
 662         free_page((unsigned long)buffer);
 663         return err;
 664 }
 665
 666 static const struct file_operations scsi_devinfo_proc_fops = {
 667         .owner          = THIS_MODULE,
 668         .open           = proc_scsi_devinfo_open,
 669         .read           = seq_read,
 670         .write          = proc_scsi_devinfo_write,
 671         .llseek         = seq_lseek,
 672         .release        = seq_release,
 673 };
 674 #endif /* CONFIG_SCSI_PROC_FS */
 675
 676 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 677 MODULE_PARM_DESC(dev_flags,
 678          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 679          " list entries for vendor and model with an integer value of flags"
 680          " to the scsi device info list");
 681
 682 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 683 MODULE_PARM_DESC(default_dev_flags,
 684                  "scsi default device flag integer value");
 685
 686 /**
 687  * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 688  **/
 689 void scsi_exit_devinfo(void)
 690 {
 691 #ifdef CONFIG_SCSI_PROC_FS
 692         remove_proc_entry("scsi/device_info", NULL);
 693 #endif
 694
 695         scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 696 }
 697
 698 /**
 699  * scsi_dev_info_add_list - add a new devinfo list
 700  * @key:        key of the list to add
 701  * @name:       Name of the list to add (for /proc/scsi/device_info)
 702  *
 703  * Adds the requested list, returns zero on success, -EEXIST if the
 704  * key is already registered to a list, or other error on failure.
 705  */
 706 int scsi_dev_info_add_list(int key, const char *name)
 707 {
 708         struct scsi_dev_info_list_table *devinfo_table =
 709                 scsi_devinfo_lookup_by_key(key);
 710
 711         if (!IS_ERR(devinfo_table))
 712                 /* list already exists */
 713                 return -EEXIST;
 714
 715         devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 716
 717         if (!devinfo_table)
 718                 return -ENOMEM;
 719
 720         INIT_LIST_HEAD(&devinfo_table->node);
 721         INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 722         devinfo_table->name = name;
 723         devinfo_table->key = key;
 724         list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 725
 726         return 0;
 727 }
 728 EXPORT_SYMBOL(scsi_dev_info_add_list);
 729
 730 /**
 731  * scsi_dev_info_remove_list - destroy an added devinfo list
 732  * @key: key of the list to destroy
 733  *
 734  * Iterates over the entire list first, freeing all the values, then
 735  * frees the list itself.  Returns 0 on success or -EINVAL if the key
 736  * can't be found.
 737  */
 738 int scsi_dev_info_remove_list(int key)
 739 {
 740         struct list_head *lh, *lh_next;
 741         struct scsi_dev_info_list_table *devinfo_table =
 742                 scsi_devinfo_lookup_by_key(key);
 743
 744         if (IS_ERR(devinfo_table))
 745                 /* no such list */
 746                 return -EINVAL;
 747
 748         /* remove from the master list */
 749         list_del(&devinfo_table->node);
 750
 751         list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 752                 struct scsi_dev_info_list *devinfo;
 753
 754                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 755                                      dev_info_list);
 756                 kfree(devinfo);
 757         }
 758         kfree(devinfo_table);
 759
 760         return 0;
 761 }
 762 EXPORT_SYMBOL(scsi_dev_info_remove_list);
 763
 764 /**
 765  * scsi_init_devinfo - set up the dynamic device list.
 766  *
 767  * Description:
 768  *      Add command line entries from scsi_dev_flags, then add
 769  *      scsi_static_device_list entries to the scsi device info list.
 770  */
 771 int __init scsi_init_devinfo(void)
 772 {
 773 #ifdef CONFIG_SCSI_PROC_FS
 774         struct proc_dir_entry *p;
 775 #endif
 776         int error, i;
 777
 778         error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 779         if (error)
 780                 return error;
 781
 782         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 783         if (error)
 784                 goto out;
 785
 786         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 787                 error = scsi_dev_info_list_add(1 /* compatibile */,
 788                                 scsi_static_device_list[i].vendor,
 789                                 scsi_static_device_list[i].model,
 790                                 NULL,
 791                                 scsi_static_device_list[i].flags);
 792                 if (error)
 793                         goto out;
 794         }
 795
 796 #ifdef CONFIG_SCSI_PROC_FS
 797         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
 798         if (!p) {
 799                 error = -ENOMEM;
 800                 goto out;
 801         }
 802 #endif /* CONFIG_SCSI_PROC_FS */
 803
 804  out:
 805         if (error)
 806                 scsi_exit_devinfo();
 807         return error;
 808 }