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", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
 201         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 202         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 203         {"INSITE", "I325VM", NULL, BLIST_KEY},
 204         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 205         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 206         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 207         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 208         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 209         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 210         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 211         {"MICROP", "4110", NULL, BLIST_NOTQ},
 212         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 213         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 214         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 215         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 216         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 217         {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 218         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 219         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 220         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 221         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 222         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 223         {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 224         {"Promise", "", NULL, BLIST_SPARSELUN},
 225         {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 226         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 227         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 228         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 229         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 230         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 231         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 232         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 233         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 234         {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 235         {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 236         {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 237         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 238         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 239         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 240         {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 241         {"SUN", "T300", "*", BLIST_SPARSELUN},
 242         {"SUN", "T4", "*", BLIST_SPARSELUN},
 243         {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
 244         {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 245         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 246         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 247         {"Traxdata", "CDR4120", NULL, BLIST_NOLUN},     /* locks up */
 248         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 249         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 250         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 251         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 252         {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 253         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 254         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 255         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 256         { NULL, NULL, NULL, 0 },
 257 };
 258
 259 static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
 260 {
 261         struct scsi_dev_info_list_table *devinfo_table;
 262         int found = 0;
 263
 264         list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
 265                 if (devinfo_table->key == key) {
 266                         found = 1;
 267                         break;
 268                 }
 269         if (!found)
 270                 return ERR_PTR(-EINVAL);
 271
 272         return devinfo_table;
 273 }
 274
 275 /*
 276  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 277  * devinfo vendor and model strings.
 278  */
 279 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 280                                 char *from, int compatible)
 281 {
 282         size_t from_length;
 283
 284         from_length = strlen(from);
 285         strncpy(to, from, min(to_length, from_length));
 286         if (from_length < to_length) {
 287                 if (compatible) {
 288                         /*
 289                          * NUL terminate the string if it is short.
 290                          */
 291                         to[from_length] = '\0';
 292                 } else {
 293                         /*
 294                          * space pad the string if it is short.
 295                          */
 296                         strncpy(&to[from_length], spaces,
 297                                 to_length - from_length);
 298                 }
 299         }
 300         if (from_length > to_length)
 301                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 302                         __func__, name, from);
 303 }
 304
 305 /**
 306  * scsi_dev_info_list_add - add one dev_info list entry.
 307  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 308  * @vendor:     vendor string
 309  * @model:      model (product) string
 310  * @strflags:   integer string
 311  * @flags:      if strflags NULL, use this flag value
 312  *
 313  * Description:
 314  *      Create and add one dev_info entry for @vendor, @model, @strflags or
 315  *      @flag. If @compatible, add to the tail of the list, do not space
 316  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 317  *      are added with @compatible 1 and @clfags NULL.
 318  *
 319  * Returns: 0 OK, -error on failure.
 320  **/
 321 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 322                             char *strflags, int flags)
 323 {
 324         return scsi_dev_info_list_add_keyed(compatible, vendor, model,
 325                                             strflags, flags,
 326                                             SCSI_DEVINFO_GLOBAL);
 327 }
 328
 329 /**
 330  * scsi_dev_info_list_add_keyed - add one dev_info list entry.
 331  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 332  * @vendor:     vendor string
 333  * @model:      model (product) string
 334  * @strflags:   integer string
 335  * @flags:      if strflags NULL, use this flag value
 336  * @key:        specify list to use
 337  *
 338  * Description:
 339  *      Create and add one dev_info entry for @vendor, @model,
 340  *      @strflags or @flag in list specified by @key. If @compatible,
 341  *      add to the tail of the list, do not space pad, and set
 342  *      devinfo->compatible. The scsi_static_device_list entries are
 343  *      added with @compatible 1 and @clfags NULL.
 344  *
 345  * Returns: 0 OK, -error on failure.
 346  **/
 347 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
 348                                  char *strflags, int flags, int key)
 349 {
 350         struct scsi_dev_info_list *devinfo;
 351         struct scsi_dev_info_list_table *devinfo_table =
 352                 scsi_devinfo_lookup_by_key(key);
 353
 354         if (IS_ERR(devinfo_table))
 355                 return PTR_ERR(devinfo_table);
 356
 357         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 358         if (!devinfo) {
 359                 printk(KERN_ERR "%s: no memory\n", __func__);
 360                 return -ENOMEM;
 361         }
 362
 363         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 364                             vendor, compatible);
 365         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 366                             model, compatible);
 367
 368         if (strflags)
 369                 devinfo->flags = simple_strtoul(strflags, NULL, 0);
 370         else
 371                 devinfo->flags = flags;
 372
 373         devinfo->compatible = compatible;
 374
 375         if (compatible)
 376                 list_add_tail(&devinfo->dev_info_list,
 377                               &devinfo_table->scsi_dev_info_list);
 378         else
 379                 list_add(&devinfo->dev_info_list,
 380                          &devinfo_table->scsi_dev_info_list);
 381
 382         return 0;
 383 }
 384 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
 385
 386 /**
 387  * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
 388  * @vendor:     vendor string
 389  * @model:      model (product) string
 390  * @key:        specify list to use
 391  *
 392  * Description:
 393  *      Remove and destroy one dev_info entry for @vendor, @model
 394  *      in list specified by @key.
 395  *
 396  * Returns: 0 OK, -error on failure.
 397  **/
 398 int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key)
 399 {
 400         struct scsi_dev_info_list *devinfo, *found = NULL;
 401         struct scsi_dev_info_list_table *devinfo_table =
 402                 scsi_devinfo_lookup_by_key(key);
 403
 404         if (IS_ERR(devinfo_table))
 405                 return PTR_ERR(devinfo_table);
 406
 407         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 408                             dev_info_list) {
 409                 if (devinfo->compatible) {
 410                         /*
 411                          * Behave like the older version of get_device_flags.
 412                          */
 413                         size_t max;
 414                         /*
 415                          * XXX why skip leading spaces? If an odd INQUIRY
 416                          * value, that should have been part of the
 417                          * scsi_static_device_list[] entry, such as "  FOO"
 418                          * rather than "FOO". Since this code is already
 419                          * here, and we don't know what device it is
 420                          * trying to work with, leave it as-is.
 421                          */
 422                         max = 8;        /* max length of vendor */
 423                         while ((max > 0) && *vendor == ' ') {
 424                                 max--;
 425                                 vendor++;
 426                         }
 427                         /*
 428                          * XXX removing the following strlen() would be
 429                          * good, using it means that for a an entry not in
 430                          * the list, we scan every byte of every vendor
 431                          * listed in scsi_static_device_list[], and never match
 432                          * a single one (and still have to compare at
 433                          * least the first byte of each vendor).
 434                          */
 435                         if (memcmp(devinfo->vendor, vendor,
 436                                     min(max, strlen(devinfo->vendor))))
 437                                 continue;
 438                         /*
 439                          * Skip spaces again.
 440                          */
 441                         max = 16;       /* max length of model */
 442                         while ((max > 0) && *model == ' ') {
 443                                 max--;
 444                                 model++;
 445                         }
 446                         if (memcmp(devinfo->model, model,
 447                                    min(max, strlen(devinfo->model))))
 448                                 continue;
 449                         found = devinfo;
 450                 } else {
 451                         if (!memcmp(devinfo->vendor, vendor,
 452                                      sizeof(devinfo->vendor)) &&
 453                              !memcmp(devinfo->model, model,
 454                                       sizeof(devinfo->model)))
 455                                 found = devinfo;
 456                 }
 457                 if (found)
 458                         break;
 459         }
 460
 461         if (found) {
 462                 list_del(&found->dev_info_list);
 463                 kfree(found);
 464                 return 0;
 465         }
 466
 467         return -ENOENT;
 468 }
 469 EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
 470
 471 /**
 472  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 473  * @dev_list:   string of device flags to add
 474  *
 475  * Description:
 476  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 477  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 478  *      dev_list is modified via strsep. Can be called for command line
 479  *      addition, for proc or mabye a sysfs interface.
 480  *
 481  * Returns: 0 if OK, -error on failure.
 482  **/
 483 static int scsi_dev_info_list_add_str(char *dev_list)
 484 {
 485         char *vendor, *model, *strflags, *next;
 486         char *next_check;
 487         int res = 0;
 488
 489         next = dev_list;
 490         if (next && next[0] == '"') {
 491                 /*
 492                  * Ignore both the leading and trailing quote.
 493                  */
 494                 next++;
 495                 next_check = ",\"";
 496         } else {
 497                 next_check = ",";
 498         }
 499
 500         /*
 501          * For the leading and trailing '"' case, the for loop comes
 502          * through the last time with vendor[0] == '\0'.
 503          */
 504         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 505              && (res == 0); vendor = strsep(&next, ":")) {
 506                 strflags = NULL;
 507                 model = strsep(&next, ":");
 508                 if (model)
 509                         strflags = strsep(&next, next_check);
 510                 if (!model || !strflags) {
 511                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 512                                " '%s'\n", __func__, vendor, model,
 513                                strflags);
 514                         res = -EINVAL;
 515                 } else
 516                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 517                                                      model, strflags, 0);
 518         }
 519         return res;
 520 }
 521
 522 /**
 523  * get_device_flags - get device specific flags from the dynamic device list.
 524  * @sdev:       &scsi_device to get flags for
 525  * @vendor:     vendor name
 526  * @model:      model name
 527  *
 528  * Description:
 529  *     Search the global scsi_dev_info_list (specified by list zero)
 530  *     for an entry matching @vendor and @model, if found, return the
 531  *     matching flags value, else return the host or global default
 532  *     settings.  Called during scan time.
 533  **/
 534 int scsi_get_device_flags(struct scsi_device *sdev,
 535                           const unsigned char *vendor,
 536                           const unsigned char *model)
 537 {
 538         return scsi_get_device_flags_keyed(sdev, vendor, model,
 539                                            SCSI_DEVINFO_GLOBAL);
 540 }
 541
 542
 543 /**
 544  * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
 545  * @sdev:       &scsi_device to get flags for
 546  * @vendor:     vendor name
 547  * @model:      model name
 548  * @key:        list to look up
 549  *
 550  * Description:
 551  *     Search the scsi_dev_info_list specified by @key for an entry
 552  *     matching @vendor and @model, if found, return the matching
 553  *     flags value, else return the host or global default settings.
 554  *     Called during scan time.
 555  **/
 556 int scsi_get_device_flags_keyed(struct scsi_device *sdev,
 557                                 const unsigned char *vendor,
 558                                 const unsigned char *model,
 559                                 int key)
 560 {
 561         struct scsi_dev_info_list *devinfo;
 562         struct scsi_dev_info_list_table *devinfo_table;
 563
 564         devinfo_table = scsi_devinfo_lookup_by_key(key);
 565
 566         if (IS_ERR(devinfo_table))
 567                 return PTR_ERR(devinfo_table);
 568
 569         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 570                             dev_info_list) {
 571                 if (devinfo->compatible) {
 572                         /*
 573                          * Behave like the older version of get_device_flags.
 574                          */
 575                         size_t max;
 576                         /*
 577                          * XXX why skip leading spaces? If an odd INQUIRY
 578                          * value, that should have been part of the
 579                          * scsi_static_device_list[] entry, such as "  FOO"
 580                          * rather than "FOO". Since this code is already
 581                          * here, and we don't know what device it is
 582                          * trying to work with, leave it as-is.
 583                          */
 584                         max = 8;        /* max length of vendor */
 585                         while ((max > 0) && *vendor == ' ') {
 586                                 max--;
 587                                 vendor++;
 588                         }
 589                         /*
 590                          * XXX removing the following strlen() would be
 591                          * good, using it means that for a an entry not in
 592                          * the list, we scan every byte of every vendor
 593                          * listed in scsi_static_device_list[], and never match
 594                          * a single one (and still have to compare at
 595                          * least the first byte of each vendor).
 596                          */
 597                         if (memcmp(devinfo->vendor, vendor,
 598                                     min(max, strlen(devinfo->vendor))))
 599                                 continue;
 600                         /*
 601                          * Skip spaces again.
 602                          */
 603                         max = 16;       /* max length of model */
 604                         while ((max > 0) && *model == ' ') {
 605                                 max--;
 606                                 model++;
 607                         }
 608                         if (memcmp(devinfo->model, model,
 609                                    min(max, strlen(devinfo->model))))
 610                                 continue;
 611                         return devinfo->flags;
 612                 } else {
 613                         if (!memcmp(devinfo->vendor, vendor,
 614                                      sizeof(devinfo->vendor)) &&
 615                              !memcmp(devinfo->model, model,
 616                                       sizeof(devinfo->model)))
 617                                 return devinfo->flags;
 618                 }
 619         }
 620         /* nothing found, return nothing */
 621         if (key != SCSI_DEVINFO_GLOBAL)
 622                 return 0;
 623
 624         /* except for the global list, where we have an exception */
 625         if (sdev->sdev_bflags)
 626                 return sdev->sdev_bflags;
 627
 628         return scsi_default_dev_flags;
 629 }
 630 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
 631
 632 #ifdef CONFIG_SCSI_PROC_FS
 633 struct double_list {
 634         struct list_head *top;
 635         struct list_head *bottom;
 636 };
 637
 638 static int devinfo_seq_show(struct seq_file *m, void *v)
 639 {
 640         struct double_list *dl = v;
 641         struct scsi_dev_info_list_table *devinfo_table =
 642                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 643         struct scsi_dev_info_list *devinfo =
 644                 list_entry(dl->bottom, struct scsi_dev_info_list,
 645                            dev_info_list);
 646
 647         if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
 648             devinfo_table->name)
 649                 seq_printf(m, "[%s]:\n", devinfo_table->name);
 650
 651         seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
 652                    devinfo->vendor, devinfo->model, devinfo->flags);
 653         return 0;
 654 }
 655
 656 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
 657 {
 658         struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
 659         loff_t pos = *ppos;
 660
 661         if (!dl)
 662                 return NULL;
 663
 664         list_for_each(dl->top, &scsi_dev_info_list) {
 665                 struct scsi_dev_info_list_table *devinfo_table =
 666                         list_entry(dl->top, struct scsi_dev_info_list_table,
 667                                    node);
 668                 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
 669                         if (pos-- == 0)
 670                                 return dl;
 671         }
 672
 673         kfree(dl);
 674         return NULL;
 675 }
 676
 677 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
 678 {
 679         struct double_list *dl = v;
 680         struct scsi_dev_info_list_table *devinfo_table =
 681                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 682
 683         ++*ppos;
 684         dl->bottom = dl->bottom->next;
 685         while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
 686                 dl->top = dl->top->next;
 687                 if (dl->top == &scsi_dev_info_list) {
 688                         kfree(dl);
 689                         return NULL;
 690                 }
 691                 devinfo_table = list_entry(dl->top,
 692                                            struct scsi_dev_info_list_table,
 693                                            node);
 694                 dl->bottom = devinfo_table->scsi_dev_info_list.next;
 695         }
 696
 697         return dl;
 698 }
 699
 700 static void devinfo_seq_stop(struct seq_file *m, void *v)
 701 {
 702         kfree(v);
 703 }
 704
 705 static const struct seq_operations scsi_devinfo_seq_ops = {
 706         .start  = devinfo_seq_start,
 707         .next   = devinfo_seq_next,
 708         .stop   = devinfo_seq_stop,
 709         .show   = devinfo_seq_show,
 710 };
 711
 712 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 713 {
 714         return seq_open(file, &scsi_devinfo_seq_ops);
 715 }
 716
 717 /*
 718  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 719  *
 720  * Description: Adds a black/white list entry for vendor and model with an
 721  * integer value of flag to the scsi device info list.
 722  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 723  */
 724 static ssize_t proc_scsi_devinfo_write(struct file *file,
 725                                        const char __user *buf,
 726                                        size_t length, loff_t *ppos)
 727 {
 728         char *buffer;
 729         ssize_t err = length;
 730
 731         if (!buf || length>PAGE_SIZE)
 732                 return -EINVAL;
 733         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 734                 return -ENOMEM;
 735         if (copy_from_user(buffer, buf, length)) {
 736                 err =-EFAULT;
 737                 goto out;
 738         }
 739
 740         if (length < PAGE_SIZE)
 741                 buffer[length] = '\0';
 742         else if (buffer[PAGE_SIZE-1]) {
 743                 err = -EINVAL;
 744                 goto out;
 745         }
 746
 747         scsi_dev_info_list_add_str(buffer);
 748
 749 out:
 750         free_page((unsigned long)buffer);
 751         return err;
 752 }
 753
 754 static const struct file_operations scsi_devinfo_proc_fops = {
 755         .owner          = THIS_MODULE,
 756         .open           = proc_scsi_devinfo_open,
 757         .read           = seq_read,
 758         .write          = proc_scsi_devinfo_write,
 759         .llseek         = seq_lseek,
 760         .release        = seq_release,
 761 };
 762 #endif /* CONFIG_SCSI_PROC_FS */
 763
 764 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 765 MODULE_PARM_DESC(dev_flags,
 766          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 767          " list entries for vendor and model with an integer value of flags"
 768          " to the scsi device info list");
 769
 770 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 771 MODULE_PARM_DESC(default_dev_flags,
 772                  "scsi default device flag integer value");
 773
 774 /**
 775  * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 776  **/
 777 void scsi_exit_devinfo(void)
 778 {
 779 #ifdef CONFIG_SCSI_PROC_FS
 780         remove_proc_entry("scsi/device_info", NULL);
 781 #endif
 782
 783         scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 784 }
 785
 786 /**
 787  * scsi_dev_info_add_list - add a new devinfo list
 788  * @key:        key of the list to add
 789  * @name:       Name of the list to add (for /proc/scsi/device_info)
 790  *
 791  * Adds the requested list, returns zero on success, -EEXIST if the
 792  * key is already registered to a list, or other error on failure.
 793  */
 794 int scsi_dev_info_add_list(int key, const char *name)
 795 {
 796         struct scsi_dev_info_list_table *devinfo_table =
 797                 scsi_devinfo_lookup_by_key(key);
 798
 799         if (!IS_ERR(devinfo_table))
 800                 /* list already exists */
 801                 return -EEXIST;
 802
 803         devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 804
 805         if (!devinfo_table)
 806                 return -ENOMEM;
 807
 808         INIT_LIST_HEAD(&devinfo_table->node);
 809         INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 810         devinfo_table->name = name;
 811         devinfo_table->key = key;
 812         list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 813
 814         return 0;
 815 }
 816 EXPORT_SYMBOL(scsi_dev_info_add_list);
 817
 818 /**
 819  * scsi_dev_info_remove_list - destroy an added devinfo list
 820  * @key: key of the list to destroy
 821  *
 822  * Iterates over the entire list first, freeing all the values, then
 823  * frees the list itself.  Returns 0 on success or -EINVAL if the key
 824  * can't be found.
 825  */
 826 int scsi_dev_info_remove_list(int key)
 827 {
 828         struct list_head *lh, *lh_next;
 829         struct scsi_dev_info_list_table *devinfo_table =
 830                 scsi_devinfo_lookup_by_key(key);
 831
 832         if (IS_ERR(devinfo_table))
 833                 /* no such list */
 834                 return -EINVAL;
 835
 836         /* remove from the master list */
 837         list_del(&devinfo_table->node);
 838
 839         list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 840                 struct scsi_dev_info_list *devinfo;
 841
 842                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 843                                      dev_info_list);
 844                 kfree(devinfo);
 845         }
 846         kfree(devinfo_table);
 847
 848         return 0;
 849 }
 850 EXPORT_SYMBOL(scsi_dev_info_remove_list);
 851
 852 /**
 853  * scsi_init_devinfo - set up the dynamic device list.
 854  *
 855  * Description:
 856  *      Add command line entries from scsi_dev_flags, then add
 857  *      scsi_static_device_list entries to the scsi device info list.
 858  */
 859 int __init scsi_init_devinfo(void)
 860 {
 861 #ifdef CONFIG_SCSI_PROC_FS
 862         struct proc_dir_entry *p;
 863 #endif
 864         int error, i;
 865
 866         error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 867         if (error)
 868                 return error;
 869
 870         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 871         if (error)
 872                 goto out;
 873
 874         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 875                 error = scsi_dev_info_list_add(1 /* compatibile */,
 876                                 scsi_static_device_list[i].vendor,
 877                                 scsi_static_device_list[i].model,
 878                                 NULL,
 879                                 scsi_static_device_list[i].flags);
 880                 if (error)
 881                         goto out;
 882         }
 883
 884 #ifdef CONFIG_SCSI_PROC_FS
 885         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
 886         if (!p) {
 887                 error = -ENOMEM;
 888                 goto out;
 889         }
 890 #endif /* CONFIG_SCSI_PROC_FS */
 891
 892  out:
 893         if (error)
 894                 scsi_exit_devinfo();
 895         return error;
 896 }