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