kernel/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", "HUS1530", "*", BLIST_NO_DIF},
 176         {"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2},
 177         {"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 178         {"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 179         {"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 180         {"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 181         {"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 182         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 183         {"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
 184         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 185         {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 186         {"HP", "C1557A", NULL, BLIST_FORCELUN},
 187         {"HP", "C3323-300", "4269", BLIST_NOTQ},
 188         {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
 189         {"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 190         {"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 191         {"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 192         {"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 193         {"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 194         {"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 195         {"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 196         {"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 197         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 198         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 199         {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
 200         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 201         {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
 202         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 203         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 204         {"INSITE", "I325VM", NULL, BLIST_KEY},
 205         {"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
 206         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 207         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 208         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 209         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 210         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 211         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 212         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 213         {"MICROP", "4110", NULL, BLIST_NOTQ},
 214         {"MSFT", "Virtual HD", NULL, BLIST_NO_RSOC},
 215         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 216         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 217         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 218         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 219         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 220         {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 221         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 222         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 223         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 224         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 225         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 226         {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 227         {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
 228         {"Promise", "", NULL, BLIST_SPARSELUN},
 229         {"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
 230         {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 231         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 232         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 233         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 234         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 235         {"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
 236         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 237         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 238         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 239         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 240         {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 241         {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 242         {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 243         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 244         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 245         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 246         {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 247         {"SUN", "T300", "*", BLIST_SPARSELUN},
 248         {"SUN", "T4", "*", BLIST_SPARSELUN},
 249         {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
 250         {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 251         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 252         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 253         {"Traxdata", "CDR4120", NULL, BLIST_NOLUN},     /* locks up */
 254         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 255         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 256         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 257         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 258         {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 259         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 260         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 261         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 262         { NULL, NULL, NULL, 0 },
 263 };
 264
 265 static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
 266 {
 267         struct scsi_dev_info_list_table *devinfo_table;
 268         int found = 0;
 269
 270         list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
 271                 if (devinfo_table->key == key) {
 272                         found = 1;
 273                         break;
 274                 }
 275         if (!found)
 276                 return ERR_PTR(-EINVAL);
 277
 278         return devinfo_table;
 279 }
 280
 281 /*
 282  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 283  * devinfo vendor and model strings.
 284  */
 285 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 286                                 char *from, int compatible)
 287 {
 288         size_t from_length;
 289
 290         from_length = strlen(from);
 291         strncpy(to, from, min(to_length, from_length));
 292         if (from_length < to_length) {
 293                 if (compatible) {
 294                         /*
 295                          * NUL terminate the string if it is short.
 296                          */
 297                         to[from_length] = '\0';
 298                 } else {
 299                         /*
 300                          * space pad the string if it is short.
 301                          */
 302                         strncpy(&to[from_length], spaces,
 303                                 to_length - from_length);
 304                 }
 305         }
 306         if (from_length > to_length)
 307                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 308                         __func__, name, from);
 309 }
 310
 311 /**
 312  * scsi_dev_info_list_add - add one dev_info list entry.
 313  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 314  * @vendor:     vendor string
 315  * @model:      model (product) string
 316  * @strflags:   integer string
 317  * @flags:      if strflags NULL, use this flag value
 318  *
 319  * Description:
 320  *      Create and add one dev_info entry for @vendor, @model, @strflags or
 321  *      @flag. If @compatible, add to the tail of the list, do not space
 322  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 323  *      are added with @compatible 1 and @clfags NULL.
 324  *
 325  * Returns: 0 OK, -error on failure.
 326  **/
 327 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 328                             char *strflags, int flags)
 329 {
 330         return scsi_dev_info_list_add_keyed(compatible, vendor, model,
 331                                             strflags, flags,
 332                                             SCSI_DEVINFO_GLOBAL);
 333 }
 334
 335 /**
 336  * scsi_dev_info_list_add_keyed - add one dev_info list entry.
 337  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 338  * @vendor:     vendor string
 339  * @model:      model (product) string
 340  * @strflags:   integer string
 341  * @flags:      if strflags NULL, use this flag value
 342  * @key:        specify list to use
 343  *
 344  * Description:
 345  *      Create and add one dev_info entry for @vendor, @model,
 346  *      @strflags or @flag in list specified by @key. If @compatible,
 347  *      add to the tail of the list, do not space pad, and set
 348  *      devinfo->compatible. The scsi_static_device_list entries are
 349  *      added with @compatible 1 and @clfags NULL.
 350  *
 351  * Returns: 0 OK, -error on failure.
 352  **/
 353 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
 354                                  char *strflags, int flags, int key)
 355 {
 356         struct scsi_dev_info_list *devinfo;
 357         struct scsi_dev_info_list_table *devinfo_table =
 358                 scsi_devinfo_lookup_by_key(key);
 359
 360         if (IS_ERR(devinfo_table))
 361                 return PTR_ERR(devinfo_table);
 362
 363         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 364         if (!devinfo) {
 365                 printk(KERN_ERR "%s: no memory\n", __func__);
 366                 return -ENOMEM;
 367         }
 368
 369         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 370                             vendor, compatible);
 371         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 372                             model, compatible);
 373
 374         if (strflags)
 375                 devinfo->flags = simple_strtoul(strflags, NULL, 0);
 376         else
 377                 devinfo->flags = flags;
 378
 379         devinfo->compatible = compatible;
 380
 381         if (compatible)
 382                 list_add_tail(&devinfo->dev_info_list,
 383                               &devinfo_table->scsi_dev_info_list);
 384         else
 385                 list_add(&devinfo->dev_info_list,
 386                          &devinfo_table->scsi_dev_info_list);
 387
 388         return 0;
 389 }
 390 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
 391
 392 /**
 393  * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
 394  * @vendor:     vendor string
 395  * @model:      model (product) string
 396  * @key:        specify list to use
 397  *
 398  * Description:
 399  *      Remove and destroy one dev_info entry for @vendor, @model
 400  *      in list specified by @key.
 401  *
 402  * Returns: 0 OK, -error on failure.
 403  **/
 404 int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key)
 405 {
 406         struct scsi_dev_info_list *devinfo, *found = NULL;
 407         struct scsi_dev_info_list_table *devinfo_table =
 408                 scsi_devinfo_lookup_by_key(key);
 409
 410         if (IS_ERR(devinfo_table))
 411                 return PTR_ERR(devinfo_table);
 412
 413         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 414                             dev_info_list) {
 415                 if (devinfo->compatible) {
 416                         /*
 417                          * Behave like the older version of get_device_flags.
 418                          */
 419                         size_t max;
 420                         /*
 421                          * XXX why skip leading spaces? If an odd INQUIRY
 422                          * value, that should have been part of the
 423                          * scsi_static_device_list[] entry, such as "  FOO"
 424                          * rather than "FOO". Since this code is already
 425                          * here, and we don't know what device it is
 426                          * trying to work with, leave it as-is.
 427                          */
 428                         max = 8;        /* max length of vendor */
 429                         while ((max > 0) && *vendor == ' ') {
 430                                 max--;
 431                                 vendor++;
 432                         }
 433                         /*
 434                          * XXX removing the following strlen() would be
 435                          * good, using it means that for a an entry not in
 436                          * the list, we scan every byte of every vendor
 437                          * listed in scsi_static_device_list[], and never match
 438                          * a single one (and still have to compare at
 439                          * least the first byte of each vendor).
 440                          */
 441                         if (memcmp(devinfo->vendor, vendor,
 442                                     min(max, strlen(devinfo->vendor))))
 443                                 continue;
 444                         /*
 445                          * Skip spaces again.
 446                          */
 447                         max = 16;       /* max length of model */
 448                         while ((max > 0) && *model == ' ') {
 449                                 max--;
 450                                 model++;
 451                         }
 452                         if (memcmp(devinfo->model, model,
 453                                    min(max, strlen(devinfo->model))))
 454                                 continue;
 455                         found = devinfo;
 456                 } else {
 457                         if (!memcmp(devinfo->vendor, vendor,
 458                                      sizeof(devinfo->vendor)) &&
 459                              !memcmp(devinfo->model, model,
 460                                       sizeof(devinfo->model)))
 461                                 found = devinfo;
 462                 }
 463                 if (found)
 464                         break;
 465         }
 466
 467         if (found) {
 468                 list_del(&found->dev_info_list);
 469                 kfree(found);
 470                 return 0;
 471         }
 472
 473         return -ENOENT;
 474 }
 475 EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
 476
 477 /**
 478  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 479  * @dev_list:   string of device flags to add
 480  *
 481  * Description:
 482  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 483  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 484  *      dev_list is modified via strsep. Can be called for command line
 485  *      addition, for proc or mabye a sysfs interface.
 486  *
 487  * Returns: 0 if OK, -error on failure.
 488  **/
 489 static int scsi_dev_info_list_add_str(char *dev_list)
 490 {
 491         char *vendor, *model, *strflags, *next;
 492         char *next_check;
 493         int res = 0;
 494
 495         next = dev_list;
 496         if (next && next[0] == '"') {
 497                 /*
 498                  * Ignore both the leading and trailing quote.
 499                  */
 500                 next++;
 501                 next_check = ",\"";
 502         } else {
 503                 next_check = ",";
 504         }
 505
 506         /*
 507          * For the leading and trailing '"' case, the for loop comes
 508          * through the last time with vendor[0] == '\0'.
 509          */
 510         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 511              && (res == 0); vendor = strsep(&next, ":")) {
 512                 strflags = NULL;
 513                 model = strsep(&next, ":");
 514                 if (model)
 515                         strflags = strsep(&next, next_check);
 516                 if (!model || !strflags) {
 517                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 518                                " '%s'\n", __func__, vendor, model,
 519                                strflags);
 520                         res = -EINVAL;
 521                 } else
 522                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 523                                                      model, strflags, 0);
 524         }
 525         return res;
 526 }
 527
 528 /**
 529  * get_device_flags - get device specific flags from the dynamic device list.
 530  * @sdev:       &scsi_device to get flags for
 531  * @vendor:     vendor name
 532  * @model:      model name
 533  *
 534  * Description:
 535  *     Search the global scsi_dev_info_list (specified by list zero)
 536  *     for an entry matching @vendor and @model, if found, return the
 537  *     matching flags value, else return the host or global default
 538  *     settings.  Called during scan time.
 539  **/
 540 int scsi_get_device_flags(struct scsi_device *sdev,
 541                           const unsigned char *vendor,
 542                           const unsigned char *model)
 543 {
 544         return scsi_get_device_flags_keyed(sdev, vendor, model,
 545                                            SCSI_DEVINFO_GLOBAL);
 546 }
 547
 548
 549 /**
 550  * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
 551  * @sdev:       &scsi_device to get flags for
 552  * @vendor:     vendor name
 553  * @model:      model name
 554  * @key:        list to look up
 555  *
 556  * Description:
 557  *     Search the scsi_dev_info_list specified by @key for an entry
 558  *     matching @vendor and @model, if found, return the matching
 559  *     flags value, else return the host or global default settings.
 560  *     Called during scan time.
 561  **/
 562 int scsi_get_device_flags_keyed(struct scsi_device *sdev,
 563                                 const unsigned char *vendor,
 564                                 const unsigned char *model,
 565                                 int key)
 566 {
 567         struct scsi_dev_info_list *devinfo;
 568         struct scsi_dev_info_list_table *devinfo_table;
 569
 570         devinfo_table = scsi_devinfo_lookup_by_key(key);
 571
 572         if (IS_ERR(devinfo_table))
 573                 return PTR_ERR(devinfo_table);
 574
 575         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 576                             dev_info_list) {
 577                 if (devinfo->compatible) {
 578                         /*
 579                          * Behave like the older version of get_device_flags.
 580                          */
 581                         size_t max;
 582                         /*
 583                          * XXX why skip leading spaces? If an odd INQUIRY
 584                          * value, that should have been part of the
 585                          * scsi_static_device_list[] entry, such as "  FOO"
 586                          * rather than "FOO". Since this code is already
 587                          * here, and we don't know what device it is
 588                          * trying to work with, leave it as-is.
 589                          */
 590                         max = 8;        /* max length of vendor */
 591                         while ((max > 0) && *vendor == ' ') {
 592                                 max--;
 593                                 vendor++;
 594                         }
 595                         /*
 596                          * XXX removing the following strlen() would be
 597                          * good, using it means that for a an entry not in
 598                          * the list, we scan every byte of every vendor
 599                          * listed in scsi_static_device_list[], and never match
 600                          * a single one (and still have to compare at
 601                          * least the first byte of each vendor).
 602                          */
 603                         if (memcmp(devinfo->vendor, vendor,
 604                                     min(max, strlen(devinfo->vendor))))
 605                                 continue;
 606                         /*
 607                          * Skip spaces again.
 608                          */
 609                         max = 16;       /* max length of model */
 610                         while ((max > 0) && *model == ' ') {
 611                                 max--;
 612                                 model++;
 613                         }
 614                         if (memcmp(devinfo->model, model,
 615                                    min(max, strlen(devinfo->model))))
 616                                 continue;
 617                         return devinfo->flags;
 618                 } else {
 619                         if (!memcmp(devinfo->vendor, vendor,
 620                                      sizeof(devinfo->vendor)) &&
 621                              !memcmp(devinfo->model, model,
 622                                       sizeof(devinfo->model)))
 623                                 return devinfo->flags;
 624                 }
 625         }
 626         /* nothing found, return nothing */
 627         if (key != SCSI_DEVINFO_GLOBAL)
 628                 return 0;
 629
 630         /* except for the global list, where we have an exception */
 631         if (sdev->sdev_bflags)
 632                 return sdev->sdev_bflags;
 633
 634         return scsi_default_dev_flags;
 635 }
 636 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
 637
 638 #ifdef CONFIG_SCSI_PROC_FS
 639 struct double_list {
 640         struct list_head *top;
 641         struct list_head *bottom;
 642 };
 643
 644 static int devinfo_seq_show(struct seq_file *m, void *v)
 645 {
 646         struct double_list *dl = v;
 647         struct scsi_dev_info_list_table *devinfo_table =
 648                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 649         struct scsi_dev_info_list *devinfo =
 650                 list_entry(dl->bottom, struct scsi_dev_info_list,
 651                            dev_info_list);
 652
 653         if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
 654             devinfo_table->name)
 655                 seq_printf(m, "[%s]:\n", devinfo_table->name);
 656
 657         seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
 658                    devinfo->vendor, devinfo->model, devinfo->flags);
 659         return 0;
 660 }
 661
 662 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
 663 {
 664         struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
 665         loff_t pos = *ppos;
 666
 667         if (!dl)
 668                 return NULL;
 669
 670         list_for_each(dl->top, &scsi_dev_info_list) {
 671                 struct scsi_dev_info_list_table *devinfo_table =
 672                         list_entry(dl->top, struct scsi_dev_info_list_table,
 673                                    node);
 674                 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
 675                         if (pos-- == 0)
 676                                 return dl;
 677         }
 678
 679         kfree(dl);
 680         return NULL;
 681 }
 682
 683 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
 684 {
 685         struct double_list *dl = v;
 686         struct scsi_dev_info_list_table *devinfo_table =
 687                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 688
 689         ++*ppos;
 690         dl->bottom = dl->bottom->next;
 691         while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
 692                 dl->top = dl->top->next;
 693                 if (dl->top == &scsi_dev_info_list) {
 694                         kfree(dl);
 695                         return NULL;
 696                 }
 697                 devinfo_table = list_entry(dl->top,
 698                                            struct scsi_dev_info_list_table,
 699                                            node);
 700                 dl->bottom = devinfo_table->scsi_dev_info_list.next;
 701         }
 702
 703         return dl;
 704 }
 705
 706 static void devinfo_seq_stop(struct seq_file *m, void *v)
 707 {
 708         kfree(v);
 709 }
 710
 711 static const struct seq_operations scsi_devinfo_seq_ops = {
 712         .start  = devinfo_seq_start,
 713         .next   = devinfo_seq_next,
 714         .stop   = devinfo_seq_stop,
 715         .show   = devinfo_seq_show,
 716 };
 717
 718 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 719 {
 720         return seq_open(file, &scsi_devinfo_seq_ops);
 721 }
 722
 723 /*
 724  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 725  *
 726  * Description: Adds a black/white list entry for vendor and model with an
 727  * integer value of flag to the scsi device info list.
 728  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 729  */
 730 static ssize_t proc_scsi_devinfo_write(struct file *file,
 731                                        const char __user *buf,
 732                                        size_t length, loff_t *ppos)
 733 {
 734         char *buffer;
 735         ssize_t err = length;
 736
 737         if (!buf || length>PAGE_SIZE)
 738                 return -EINVAL;
 739         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 740                 return -ENOMEM;
 741         if (copy_from_user(buffer, buf, length)) {
 742                 err =-EFAULT;
 743                 goto out;
 744         }
 745
 746         if (length < PAGE_SIZE)
 747                 buffer[length] = '\0';
 748         else if (buffer[PAGE_SIZE-1]) {
 749                 err = -EINVAL;
 750                 goto out;
 751         }
 752
 753         scsi_dev_info_list_add_str(buffer);
 754
 755 out:
 756         free_page((unsigned long)buffer);
 757         return err;
 758 }
 759
 760 static const struct file_operations scsi_devinfo_proc_fops = {
 761         .owner          = THIS_MODULE,
 762         .open           = proc_scsi_devinfo_open,
 763         .read           = seq_read,
 764         .write          = proc_scsi_devinfo_write,
 765         .llseek         = seq_lseek,
 766         .release        = seq_release,
 767 };
 768 #endif /* CONFIG_SCSI_PROC_FS */
 769
 770 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 771 MODULE_PARM_DESC(dev_flags,
 772          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 773          " list entries for vendor and model with an integer value of flags"
 774          " to the scsi device info list");
 775
 776 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 777 MODULE_PARM_DESC(default_dev_flags,
 778                  "scsi default device flag integer value");
 779
 780 /**
 781  * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 782  **/
 783 void scsi_exit_devinfo(void)
 784 {
 785 #ifdef CONFIG_SCSI_PROC_FS
 786         remove_proc_entry("scsi/device_info", NULL);
 787 #endif
 788
 789         scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 790 }
 791
 792 /**
 793  * scsi_dev_info_add_list - add a new devinfo list
 794  * @key:        key of the list to add
 795  * @name:       Name of the list to add (for /proc/scsi/device_info)
 796  *
 797  * Adds the requested list, returns zero on success, -EEXIST if the
 798  * key is already registered to a list, or other error on failure.
 799  */
 800 int scsi_dev_info_add_list(int key, const char *name)
 801 {
 802         struct scsi_dev_info_list_table *devinfo_table =
 803                 scsi_devinfo_lookup_by_key(key);
 804
 805         if (!IS_ERR(devinfo_table))
 806                 /* list already exists */
 807                 return -EEXIST;
 808
 809         devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 810
 811         if (!devinfo_table)
 812                 return -ENOMEM;
 813
 814         INIT_LIST_HEAD(&devinfo_table->node);
 815         INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 816         devinfo_table->name = name;
 817         devinfo_table->key = key;
 818         list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 819
 820         return 0;
 821 }
 822 EXPORT_SYMBOL(scsi_dev_info_add_list);
 823
 824 /**
 825  * scsi_dev_info_remove_list - destroy an added devinfo list
 826  * @key: key of the list to destroy
 827  *
 828  * Iterates over the entire list first, freeing all the values, then
 829  * frees the list itself.  Returns 0 on success or -EINVAL if the key
 830  * can't be found.
 831  */
 832 int scsi_dev_info_remove_list(int key)
 833 {
 834         struct list_head *lh, *lh_next;
 835         struct scsi_dev_info_list_table *devinfo_table =
 836                 scsi_devinfo_lookup_by_key(key);
 837
 838         if (IS_ERR(devinfo_table))
 839                 /* no such list */
 840                 return -EINVAL;
 841
 842         /* remove from the master list */
 843         list_del(&devinfo_table->node);
 844
 845         list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 846                 struct scsi_dev_info_list *devinfo;
 847
 848                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 849                                      dev_info_list);
 850                 kfree(devinfo);
 851         }
 852         kfree(devinfo_table);
 853
 854         return 0;
 855 }
 856 EXPORT_SYMBOL(scsi_dev_info_remove_list);
 857
 858 /**
 859  * scsi_init_devinfo - set up the dynamic device list.
 860  *
 861  * Description:
 862  *      Add command line entries from scsi_dev_flags, then add
 863  *      scsi_static_device_list entries to the scsi device info list.
 864  */
 865 int __init scsi_init_devinfo(void)
 866 {
 867 #ifdef CONFIG_SCSI_PROC_FS
 868         struct proc_dir_entry *p;
 869 #endif
 870         int error, i;
 871
 872         error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 873         if (error)
 874                 return error;
 875
 876         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 877         if (error)
 878                 goto out;
 879
 880         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 881                 error = scsi_dev_info_list_add(1 /* compatibile */,
 882                                 scsi_static_device_list[i].vendor,
 883                                 scsi_static_device_list[i].model,
 884                                 NULL,
 885                                 scsi_static_device_list[i].flags);
 886                 if (error)
 887                         goto out;
 888         }
 889
 890 #ifdef CONFIG_SCSI_PROC_FS
 891         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
 892         if (!p) {
 893                 error = -ENOMEM;
 894                 goto out;
 895         }
 896 #endif /* CONFIG_SCSI_PROC_FS */
 897
 898  out:
 899         if (error)
 900                 scsi_exit_devinfo();
 901         return error;
 902 }