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_find - find a matching dev_info list entry.
 394  * @vendor:     vendor string
 395  * @model:      model (product) string
 396  * @key:        specify list to use
 397  *
 398  * Description:
 399  *      Finds the first dev_info entry matching @vendor, @model
 400  *      in list specified by @key.
 401  *
 402  * Returns: pointer to matching entry, or ERR_PTR on failure.
 403  **/
 404 static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
 405                 const char *model, int key)
 406 {
 407         struct scsi_dev_info_list *devinfo;
 408         struct scsi_dev_info_list_table *devinfo_table =
 409                 scsi_devinfo_lookup_by_key(key);
 410
 411         if (IS_ERR(devinfo_table))
 412                 return (struct scsi_dev_info_list *) devinfo_table;
 413
 414         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 415                             dev_info_list) {
 416                 if (devinfo->compatible) {
 417                         /*
 418                          * Behave like the older version of get_device_flags.
 419                          */
 420                         size_t max;
 421                         /*
 422                          * XXX why skip leading spaces? If an odd INQUIRY
 423                          * value, that should have been part of the
 424                          * scsi_static_device_list[] entry, such as "  FOO"
 425                          * rather than "FOO". Since this code is already
 426                          * here, and we don't know what device it is
 427                          * trying to work with, leave it as-is.
 428                          */
 429                         max = 8;        /* max length of vendor */
 430                         while ((max > 0) && *vendor == ' ') {
 431                                 max--;
 432                                 vendor++;
 433                         }
 434                         /*
 435                          * XXX removing the following strlen() would be
 436                          * good, using it means that for a an entry not in
 437                          * the list, we scan every byte of every vendor
 438                          * listed in scsi_static_device_list[], and never match
 439                          * a single one (and still have to compare at
 440                          * least the first byte of each vendor).
 441                          */
 442                         if (memcmp(devinfo->vendor, vendor,
 443                                     min(max, strlen(devinfo->vendor))))
 444                                 continue;
 445                         /*
 446                          * Skip spaces again.
 447                          */
 448                         max = 16;       /* max length of model */
 449                         while ((max > 0) && *model == ' ') {
 450                                 max--;
 451                                 model++;
 452                         }
 453                         if (memcmp(devinfo->model, model,
 454                                    min(max, strlen(devinfo->model))))
 455                                 continue;
 456                         return devinfo;
 457                 } else {
 458                         if (!memcmp(devinfo->vendor, vendor,
 459                                      sizeof(devinfo->vendor)) &&
 460                              !memcmp(devinfo->model, model,
 461                                       sizeof(devinfo->model)))
 462                                 return devinfo;
 463                 }
 464         }
 465
 466         return ERR_PTR(-ENOENT);
 467 }
 468
 469 /**
 470  * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
 471  * @vendor:     vendor string
 472  * @model:      model (product) string
 473  * @key:        specify list to use
 474  *
 475  * Description:
 476  *      Remove and destroy one dev_info entry for @vendor, @model
 477  *      in list specified by @key.
 478  *
 479  * Returns: 0 OK, -error on failure.
 480  **/
 481 int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key)
 482 {
 483         struct scsi_dev_info_list *found;
 484
 485         found = scsi_dev_info_list_find(vendor, model, key);
 486         if (IS_ERR(found))
 487                 return PTR_ERR(found);
 488
 489         list_del(&found->dev_info_list);
 490         kfree(found);
 491         return 0;
 492 }
 493 EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
 494
 495 /**
 496  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 497  * @dev_list:   string of device flags to add
 498  *
 499  * Description:
 500  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 501  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 502  *      dev_list is modified via strsep. Can be called for command line
 503  *      addition, for proc or mabye a sysfs interface.
 504  *
 505  * Returns: 0 if OK, -error on failure.
 506  **/
 507 static int scsi_dev_info_list_add_str(char *dev_list)
 508 {
 509         char *vendor, *model, *strflags, *next;
 510         char *next_check;
 511         int res = 0;
 512
 513         next = dev_list;
 514         if (next && next[0] == '"') {
 515                 /*
 516                  * Ignore both the leading and trailing quote.
 517                  */
 518                 next++;
 519                 next_check = ",\"";
 520         } else {
 521                 next_check = ",";
 522         }
 523
 524         /*
 525          * For the leading and trailing '"' case, the for loop comes
 526          * through the last time with vendor[0] == '\0'.
 527          */
 528         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 529              && (res == 0); vendor = strsep(&next, ":")) {
 530                 strflags = NULL;
 531                 model = strsep(&next, ":");
 532                 if (model)
 533                         strflags = strsep(&next, next_check);
 534                 if (!model || !strflags) {
 535                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 536                                " '%s'\n", __func__, vendor, model,
 537                                strflags);
 538                         res = -EINVAL;
 539                 } else
 540                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 541                                                      model, strflags, 0);
 542         }
 543         return res;
 544 }
 545
 546 /**
 547  * get_device_flags - get device specific flags from the dynamic device list.
 548  * @sdev:       &scsi_device to get flags for
 549  * @vendor:     vendor name
 550  * @model:      model name
 551  *
 552  * Description:
 553  *     Search the global scsi_dev_info_list (specified by list zero)
 554  *     for an entry matching @vendor and @model, if found, return the
 555  *     matching flags value, else return the host or global default
 556  *     settings.  Called during scan time.
 557  **/
 558 int scsi_get_device_flags(struct scsi_device *sdev,
 559                           const unsigned char *vendor,
 560                           const unsigned char *model)
 561 {
 562         return scsi_get_device_flags_keyed(sdev, vendor, model,
 563                                            SCSI_DEVINFO_GLOBAL);
 564 }
 565
 566
 567 /**
 568  * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
 569  * @sdev:       &scsi_device to get flags for
 570  * @vendor:     vendor name
 571  * @model:      model name
 572  * @key:        list to look up
 573  *
 574  * Description:
 575  *     Search the scsi_dev_info_list specified by @key for an entry
 576  *     matching @vendor and @model, if found, return the matching
 577  *     flags value, else return the host or global default settings.
 578  *     Called during scan time.
 579  **/
 580 int scsi_get_device_flags_keyed(struct scsi_device *sdev,
 581                                 const unsigned char *vendor,
 582                                 const unsigned char *model,
 583                                 int key)
 584 {
 585         struct scsi_dev_info_list *devinfo;
 586         int err;
 587
 588         devinfo = scsi_dev_info_list_find(vendor, model, key);
 589         if (!IS_ERR(devinfo))
 590                 return devinfo->flags;
 591
 592         err = PTR_ERR(devinfo);
 593         if (err != -ENOENT)
 594                 return err;
 595
 596         /* nothing found, return nothing */
 597         if (key != SCSI_DEVINFO_GLOBAL)
 598                 return 0;
 599
 600         /* except for the global list, where we have an exception */
 601         if (sdev->sdev_bflags)
 602                 return sdev->sdev_bflags;
 603
 604         return scsi_default_dev_flags;
 605 }
 606 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
 607
 608 #ifdef CONFIG_SCSI_PROC_FS
 609 struct double_list {
 610         struct list_head *top;
 611         struct list_head *bottom;
 612 };
 613
 614 static int devinfo_seq_show(struct seq_file *m, void *v)
 615 {
 616         struct double_list *dl = v;
 617         struct scsi_dev_info_list_table *devinfo_table =
 618                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 619         struct scsi_dev_info_list *devinfo =
 620                 list_entry(dl->bottom, struct scsi_dev_info_list,
 621                            dev_info_list);
 622
 623         if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
 624             devinfo_table->name)
 625                 seq_printf(m, "[%s]:\n", devinfo_table->name);
 626
 627         seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
 628                    devinfo->vendor, devinfo->model, devinfo->flags);
 629         return 0;
 630 }
 631
 632 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
 633 {
 634         struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
 635         loff_t pos = *ppos;
 636
 637         if (!dl)
 638                 return NULL;
 639
 640         list_for_each(dl->top, &scsi_dev_info_list) {
 641                 struct scsi_dev_info_list_table *devinfo_table =
 642                         list_entry(dl->top, struct scsi_dev_info_list_table,
 643                                    node);
 644                 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
 645                         if (pos-- == 0)
 646                                 return dl;
 647         }
 648
 649         kfree(dl);
 650         return NULL;
 651 }
 652
 653 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
 654 {
 655         struct double_list *dl = v;
 656         struct scsi_dev_info_list_table *devinfo_table =
 657                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 658
 659         ++*ppos;
 660         dl->bottom = dl->bottom->next;
 661         while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
 662                 dl->top = dl->top->next;
 663                 if (dl->top == &scsi_dev_info_list) {
 664                         kfree(dl);
 665                         return NULL;
 666                 }
 667                 devinfo_table = list_entry(dl->top,
 668                                            struct scsi_dev_info_list_table,
 669                                            node);
 670                 dl->bottom = devinfo_table->scsi_dev_info_list.next;
 671         }
 672
 673         return dl;
 674 }
 675
 676 static void devinfo_seq_stop(struct seq_file *m, void *v)
 677 {
 678         kfree(v);
 679 }
 680
 681 static const struct seq_operations scsi_devinfo_seq_ops = {
 682         .start  = devinfo_seq_start,
 683         .next   = devinfo_seq_next,
 684         .stop   = devinfo_seq_stop,
 685         .show   = devinfo_seq_show,
 686 };
 687
 688 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 689 {
 690         return seq_open(file, &scsi_devinfo_seq_ops);
 691 }
 692
 693 /*
 694  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 695  *
 696  * Description: Adds a black/white list entry for vendor and model with an
 697  * integer value of flag to the scsi device info list.
 698  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 699  */
 700 static ssize_t proc_scsi_devinfo_write(struct file *file,
 701                                        const char __user *buf,
 702                                        size_t length, loff_t *ppos)
 703 {
 704         char *buffer;
 705         ssize_t err = length;
 706
 707         if (!buf || length>PAGE_SIZE)
 708                 return -EINVAL;
 709         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 710                 return -ENOMEM;
 711         if (copy_from_user(buffer, buf, length)) {
 712                 err =-EFAULT;
 713                 goto out;
 714         }
 715
 716         if (length < PAGE_SIZE)
 717                 buffer[length] = '\0';
 718         else if (buffer[PAGE_SIZE-1]) {
 719                 err = -EINVAL;
 720                 goto out;
 721         }
 722
 723         scsi_dev_info_list_add_str(buffer);
 724
 725 out:
 726         free_page((unsigned long)buffer);
 727         return err;
 728 }
 729
 730 static const struct file_operations scsi_devinfo_proc_fops = {
 731         .owner          = THIS_MODULE,
 732         .open           = proc_scsi_devinfo_open,
 733         .read           = seq_read,
 734         .write          = proc_scsi_devinfo_write,
 735         .llseek         = seq_lseek,
 736         .release        = seq_release,
 737 };
 738 #endif /* CONFIG_SCSI_PROC_FS */
 739
 740 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 741 MODULE_PARM_DESC(dev_flags,
 742          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 743          " list entries for vendor and model with an integer value of flags"
 744          " to the scsi device info list");
 745
 746 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 747 MODULE_PARM_DESC(default_dev_flags,
 748                  "scsi default device flag integer value");
 749
 750 /**
 751  * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 752  **/
 753 void scsi_exit_devinfo(void)
 754 {
 755 #ifdef CONFIG_SCSI_PROC_FS
 756         remove_proc_entry("scsi/device_info", NULL);
 757 #endif
 758
 759         scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 760 }
 761
 762 /**
 763  * scsi_dev_info_add_list - add a new devinfo list
 764  * @key:        key of the list to add
 765  * @name:       Name of the list to add (for /proc/scsi/device_info)
 766  *
 767  * Adds the requested list, returns zero on success, -EEXIST if the
 768  * key is already registered to a list, or other error on failure.
 769  */
 770 int scsi_dev_info_add_list(int key, const char *name)
 771 {
 772         struct scsi_dev_info_list_table *devinfo_table =
 773                 scsi_devinfo_lookup_by_key(key);
 774
 775         if (!IS_ERR(devinfo_table))
 776                 /* list already exists */
 777                 return -EEXIST;
 778
 779         devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 780
 781         if (!devinfo_table)
 782                 return -ENOMEM;
 783
 784         INIT_LIST_HEAD(&devinfo_table->node);
 785         INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 786         devinfo_table->name = name;
 787         devinfo_table->key = key;
 788         list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 789
 790         return 0;
 791 }
 792 EXPORT_SYMBOL(scsi_dev_info_add_list);
 793
 794 /**
 795  * scsi_dev_info_remove_list - destroy an added devinfo list
 796  * @key: key of the list to destroy
 797  *
 798  * Iterates over the entire list first, freeing all the values, then
 799  * frees the list itself.  Returns 0 on success or -EINVAL if the key
 800  * can't be found.
 801  */
 802 int scsi_dev_info_remove_list(int key)
 803 {
 804         struct list_head *lh, *lh_next;
 805         struct scsi_dev_info_list_table *devinfo_table =
 806                 scsi_devinfo_lookup_by_key(key);
 807
 808         if (IS_ERR(devinfo_table))
 809                 /* no such list */
 810                 return -EINVAL;
 811
 812         /* remove from the master list */
 813         list_del(&devinfo_table->node);
 814
 815         list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 816                 struct scsi_dev_info_list *devinfo;
 817
 818                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 819                                      dev_info_list);
 820                 kfree(devinfo);
 821         }
 822         kfree(devinfo_table);
 823
 824         return 0;
 825 }
 826 EXPORT_SYMBOL(scsi_dev_info_remove_list);
 827
 828 /**
 829  * scsi_init_devinfo - set up the dynamic device list.
 830  *
 831  * Description:
 832  *      Add command line entries from scsi_dev_flags, then add
 833  *      scsi_static_device_list entries to the scsi device info list.
 834  */
 835 int __init scsi_init_devinfo(void)
 836 {
 837 #ifdef CONFIG_SCSI_PROC_FS
 838         struct proc_dir_entry *p;
 839 #endif
 840         int error, i;
 841
 842         error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 843         if (error)
 844                 return error;
 845
 846         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 847         if (error)
 848                 goto out;
 849
 850         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 851                 error = scsi_dev_info_list_add(1 /* compatibile */,
 852                                 scsi_static_device_list[i].vendor,
 853                                 scsi_static_device_list[i].model,
 854                                 NULL,
 855                                 scsi_static_device_list[i].flags);
 856                 if (error)
 857                         goto out;
 858         }
 859
 860 #ifdef CONFIG_SCSI_PROC_FS
 861         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
 862         if (!p) {
 863                 error = -ENOMEM;
 864                 goto out;
 865         }
 866 #endif /* CONFIG_SCSI_PROC_FS */
 867
 868  out:
 869         if (error)
 870                 scsi_exit_devinfo();
 871         return error;
 872 }