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 unsigned scsi_default_dev_flags;
  37 static LIST_HEAD(scsi_dev_info_list);
  38 static char scsi_dev_flags[256];
  39
  40 /*
  41  * scsi_static_device_list: deprecated list of devices that require
  42  * settings that differ from the default, includes black-listed (broken)
  43  * devices. The entries here are added to the tail of scsi_dev_info_list
  44  * via scsi_dev_info_list_init.
  45  *
  46  * Do not add to this list, use the command line or proc interface to add
  47  * to the scsi_dev_info_list. This table will eventually go away.
  48  */
  49 static struct {
  50         char *vendor;
  51         char *model;
  52         char *revision; /* revision known to be bad, unused */
  53         unsigned flags;
  54 } scsi_static_device_list[] __initdata = {
  55         /*
  56          * The following devices are known not to tolerate a lun != 0 scan
  57          * for one reason or another. Some will respond to all luns,
  58          * others will lock up.
  59          */
  60         {"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN},     /* locks up */
  61         {"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN},       /* locks up */
  62         {"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN},       /* locks up */
  63         {"DENON", "DRD-25X", "V", BLIST_NOLUN},                 /* locks up */
  64         {"HITACHI", "DK312C", "CM81", BLIST_NOLUN},     /* responds to all lun */
  65         {"HITACHI", "DK314C", "CR21", BLIST_NOLUN},     /* responds to all lun */
  66         {"IBM", "2104-DU3", NULL, BLIST_NOLUN},         /* locks up */
  67         {"IBM", "2104-TU3", NULL, BLIST_NOLUN},         /* locks up */
  68         {"IMS", "CDD521/10", "2.06", BLIST_NOLUN},      /* locks up */
  69         {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN},     /* locks up */
  70         {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN},     /* locks up */
  71         {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN},   /* locks up */
  72         {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN},     /* locks up */
  73         {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN},     /* locks up */
  74         {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN},    /* responds to all lun */
  75         {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN},      /* responds to all lun */
  76         {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
  77         {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN},    /* responds to all lun */
  78         {"RODIME", "RO3000S", "2.33", BLIST_NOLUN},     /* locks up */
  79         {"SUN", "SENA", NULL, BLIST_NOLUN},             /* responds to all luns */
  80         /*
  81          * The following causes a failed REQUEST SENSE on lun 1 for
  82          * aha152x controller, which causes SCSI code to reset bus.
  83          */
  84         {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
  85         /*
  86          * The following causes a failed REQUEST SENSE on lun 1 for
  87          * aha152x controller, which causes SCSI code to reset bus.
  88          */
  89         {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
  90         {"SEAGATE", "ST296", "921", BLIST_NOLUN},       /* responds to all lun */
  91         {"SEAGATE", "ST1581", "6538", BLIST_NOLUN},     /* responds to all lun */
  92         {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
  93         {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
  94         {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
  95         {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
  96         {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
  97         {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN},   /* locks up */
  98         {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN},       /* locks up */
  99         /*
 100          * The following causes a failed REQUEST SENSE on lun 1 for
 101          * seagate controller, which causes SCSI code to reset bus.
 102          */
 103         {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
 104         {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN},        /* responds to all lun */
 105         /*
 106          * The following causes a failed REQUEST SENSE on lun 1 for
 107          * seagate controller, which causes SCSI code to reset bus.
 108          */
 109         {"HP", "C1750A", "3226", BLIST_NOLUN},          /* scanjet iic */
 110         {"HP", "C1790A", "", BLIST_NOLUN},              /* scanjet iip */
 111         {"HP", "C2500A", "", BLIST_NOLUN},              /* scanjet iicx */
 112         {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
 113         {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN},      /* responds to all lun */
 114         {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN},     /* locks up */
 115         {"NEC", "D3856", "0009", BLIST_NOLUN},
 116         {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN},    /* locks up */
 117         {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN},    /* locks up */
 118         {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN},    /* locks up */
 119         {"RELISYS", "Scorpio", NULL, BLIST_NOLUN},      /* responds to all lun */
 120         {"SANKYO", "CP525", "6.64", BLIST_NOLUN},       /* causes failed REQ SENSE, extra reset */
 121         {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
 122         {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
 123         {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN},      /* locks up */
 124         {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN},      /* locks up */
 125         {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN},     /* locks up */
 126         {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN},    /* locks up */
 127         {"", "Scanner", "1.80", BLIST_NOLUN},   /* responds to all lun */
 128
 129         /*
 130          * Other types of devices that have special flags.
 131          * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
 132          */
 133         {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
 134         {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
 135         {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
 136         {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
 137         {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_FORCELUN | BLIST_INQUIRY_36},
 138         {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
 139         {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
 140         {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
 141         {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
 142         {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
 143         {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
 144         {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
 145         {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
 146                 BLIST_MAX_512 | BLIST_REPORTLUN2},      /* Compaq RA4x00 */
 147         {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
 148         {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
 149         {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 150         {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 151         {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 152         {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
 153         {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 154         {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
 155         {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
 156         {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
 157         {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
 158         {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
 159         {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
 160         {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
 161         {"EMC",  "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 162         {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_REPORTLUN2},
 163         {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
 164         {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
 165         {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
 166         {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
 167         {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 168         {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
 169         {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
 170         {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
 171         {"HITACHI", "DF400", "*", BLIST_REPORTLUN2},
 172         {"HITACHI", "DF500", "*", BLIST_REPORTLUN2},
 173         {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
 174         {"HITACHI", "HUS1530", "*", BLIST_NO_DIF},
 175         {"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2},
 176         {"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 177         {"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 178         {"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 179         {"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 180         {"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 181         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 182         {"HP", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES}, /* HP XP Arrays */
 183         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 184         {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 185         {"HP", "C1557A", NULL, BLIST_FORCELUN},
 186         {"HP", "C3323-300", "4269", BLIST_NOTQ},
 187         {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
 188         {"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 189         {"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 190         {"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 191         {"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 192         {"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 193         {"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 194         {"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 195         {"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 196         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 197         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 198         {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
 199         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 200         {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
 201         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 202         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 203         {"INSITE", "I325VM", NULL, BLIST_KEY},
 204         {"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
 205         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 206         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 207         {"Marvell", "Console", NULL, BLIST_SKIP_VPD_PAGES},
 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         {"QEMU", "QEMU CD-ROM", NULL, BLIST_SKIP_VPD_PAGES},
 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         /* this zero-pads the destination */
 294         strncpy(to, from, to_length);
 295         if (from_length < to_length && !compatible) {
 296                 /*
 297                  * space pad the string if it is short.
 298                  */
 299                 memset(&to[from_length], ' ', to_length - from_length);
 300         }
 301         if (from_length > to_length)
 302                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 303                         __func__, name, from);
 304 }
 305
 306 /**
 307  * scsi_dev_info_list_add - add one dev_info list entry.
 308  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 309  * @vendor:     vendor string
 310  * @model:      model (product) string
 311  * @strflags:   integer string
 312  * @flags:      if strflags NULL, use this flag value
 313  *
 314  * Description:
 315  *      Create and add one dev_info entry for @vendor, @model, @strflags or
 316  *      @flag. If @compatible, add to the tail of the list, do not space
 317  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 318  *      are added with @compatible 1 and @clfags NULL.
 319  *
 320  * Returns: 0 OK, -error on failure.
 321  **/
 322 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 323                             char *strflags, int flags)
 324 {
 325         return scsi_dev_info_list_add_keyed(compatible, vendor, model,
 326                                             strflags, flags,
 327                                             SCSI_DEVINFO_GLOBAL);
 328 }
 329
 330 /**
 331  * scsi_dev_info_list_add_keyed - add one dev_info list entry.
 332  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 333  * @vendor:     vendor string
 334  * @model:      model (product) string
 335  * @strflags:   integer string
 336  * @flags:      if strflags NULL, use this flag value
 337  * @key:        specify list to use
 338  *
 339  * Description:
 340  *      Create and add one dev_info entry for @vendor, @model,
 341  *      @strflags or @flag in list specified by @key. If @compatible,
 342  *      add to the tail of the list, do not space pad, and set
 343  *      devinfo->compatible. The scsi_static_device_list entries are
 344  *      added with @compatible 1 and @clfags NULL.
 345  *
 346  * Returns: 0 OK, -error on failure.
 347  **/
 348 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
 349                                  char *strflags, int flags, int key)
 350 {
 351         struct scsi_dev_info_list *devinfo;
 352         struct scsi_dev_info_list_table *devinfo_table =
 353                 scsi_devinfo_lookup_by_key(key);
 354
 355         if (IS_ERR(devinfo_table))
 356                 return PTR_ERR(devinfo_table);
 357
 358         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 359         if (!devinfo) {
 360                 printk(KERN_ERR "%s: no memory\n", __func__);
 361                 return -ENOMEM;
 362         }
 363
 364         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 365                             vendor, compatible);
 366         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 367                             model, compatible);
 368
 369         if (strflags)
 370                 devinfo->flags = simple_strtoul(strflags, NULL, 0);
 371         else
 372                 devinfo->flags = flags;
 373
 374         devinfo->compatible = compatible;
 375
 376         if (compatible)
 377                 list_add_tail(&devinfo->dev_info_list,
 378                               &devinfo_table->scsi_dev_info_list);
 379         else
 380                 list_add(&devinfo->dev_info_list,
 381                          &devinfo_table->scsi_dev_info_list);
 382
 383         return 0;
 384 }
 385 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
 386
 387 /**
 388  * scsi_dev_info_list_find - find a matching dev_info list entry.
 389  * @vendor:     full vendor string
 390  * @model:      full model (product) string
 391  * @key:        specify list to use
 392  *
 393  * Description:
 394  *      Finds the first dev_info entry matching @vendor, @model
 395  *      in list specified by @key.
 396  *
 397  * Returns: pointer to matching entry, or ERR_PTR on failure.
 398  **/
 399 static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
 400                 const char *model, int key)
 401 {
 402         struct scsi_dev_info_list *devinfo;
 403         struct scsi_dev_info_list_table *devinfo_table =
 404                 scsi_devinfo_lookup_by_key(key);
 405         size_t vmax, mmax, mlen;
 406         const char *vskip, *mskip;
 407
 408         if (IS_ERR(devinfo_table))
 409                 return (struct scsi_dev_info_list *) devinfo_table;
 410
 411         /* Prepare for "compatible" matches */
 412
 413         /*
 414          * XXX why skip leading spaces? If an odd INQUIRY
 415          * value, that should have been part of the
 416          * scsi_static_device_list[] entry, such as "  FOO"
 417          * rather than "FOO". Since this code is already
 418          * here, and we don't know what device it is
 419          * trying to work with, leave it as-is.
 420          */
 421         vmax = sizeof(devinfo->vendor);
 422         vskip = vendor;
 423         while (vmax > 0 && *vskip == ' ') {
 424                 vmax--;
 425                 vskip++;
 426         }
 427         /* Also skip trailing spaces */
 428         while (vmax > 0 && vskip[vmax - 1] == ' ')
 429                 --vmax;
 430
 431         mmax = sizeof(devinfo->model);
 432         mskip = model;
 433         while (mmax > 0 && *mskip == ' ') {
 434                 mmax--;
 435                 mskip++;
 436         }
 437         while (mmax > 0 && mskip[mmax - 1] == ' ')
 438                 --mmax;
 439
 440         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 441                             dev_info_list) {
 442                 if (devinfo->compatible) {
 443                         /*
 444                          * vendor strings must be an exact match
 445                          */
 446                         if (vmax != strnlen(devinfo->vendor,
 447                                             sizeof(devinfo->vendor)) ||
 448                             memcmp(devinfo->vendor, vskip, vmax))
 449                                 continue;
 450
 451                         /*
 452                          * @model specifies the full string, and
 453                          * must be larger or equal to devinfo->model
 454                          */
 455                         mlen = strnlen(devinfo->model, sizeof(devinfo->model));
 456                         if (mmax < mlen || memcmp(devinfo->model, mskip, mlen))
 457                                 continue;
 458                         return devinfo;
 459                 } else {
 460                         if (!memcmp(devinfo->vendor, vendor,
 461                                      sizeof(devinfo->vendor)) &&
 462                              !memcmp(devinfo->model, model,
 463                                       sizeof(devinfo->model)))
 464                                 return devinfo;
 465                 }
 466         }
 467
 468         return ERR_PTR(-ENOENT);
 469 }
 470
 471 /**
 472  * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
 473  * @vendor:     vendor string
 474  * @model:      model (product) string
 475  * @key:        specify list to use
 476  *
 477  * Description:
 478  *      Remove and destroy one dev_info entry for @vendor, @model
 479  *      in list specified by @key.
 480  *
 481  * Returns: 0 OK, -error on failure.
 482  **/
 483 int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key)
 484 {
 485         struct scsi_dev_info_list *found;
 486
 487         found = scsi_dev_info_list_find(vendor, model, key);
 488         if (IS_ERR(found))
 489                 return PTR_ERR(found);
 490
 491         list_del(&found->dev_info_list);
 492         kfree(found);
 493         return 0;
 494 }
 495 EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
 496
 497 /**
 498  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 499  * @dev_list:   string of device flags to add
 500  *
 501  * Description:
 502  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 503  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 504  *      dev_list is modified via strsep. Can be called for command line
 505  *      addition, for proc or mabye a sysfs interface.
 506  *
 507  * Returns: 0 if OK, -error on failure.
 508  **/
 509 static int scsi_dev_info_list_add_str(char *dev_list)
 510 {
 511         char *vendor, *model, *strflags, *next;
 512         char *next_check;
 513         int res = 0;
 514
 515         next = dev_list;
 516         if (next && next[0] == '"') {
 517                 /*
 518                  * Ignore both the leading and trailing quote.
 519                  */
 520                 next++;
 521                 next_check = ",\"";
 522         } else {
 523                 next_check = ",";
 524         }
 525
 526         /*
 527          * For the leading and trailing '"' case, the for loop comes
 528          * through the last time with vendor[0] == '\0'.
 529          */
 530         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 531              && (res == 0); vendor = strsep(&next, ":")) {
 532                 strflags = NULL;
 533                 model = strsep(&next, ":");
 534                 if (model)
 535                         strflags = strsep(&next, next_check);
 536                 if (!model || !strflags) {
 537                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 538                                " '%s'\n", __func__, vendor, model,
 539                                strflags);
 540                         res = -EINVAL;
 541                 } else
 542                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 543                                                      model, strflags, 0);
 544         }
 545         return res;
 546 }
 547
 548 /**
 549  * get_device_flags - get device specific flags from the dynamic device list.
 550  * @sdev:       &scsi_device to get flags for
 551  * @vendor:     vendor name
 552  * @model:      model name
 553  *
 554  * Description:
 555  *     Search the global scsi_dev_info_list (specified by list zero)
 556  *     for an entry matching @vendor and @model, if found, return the
 557  *     matching flags value, else return the host or global default
 558  *     settings.  Called during scan time.
 559  **/
 560 int scsi_get_device_flags(struct scsi_device *sdev,
 561                           const unsigned char *vendor,
 562                           const unsigned char *model)
 563 {
 564         return scsi_get_device_flags_keyed(sdev, vendor, model,
 565                                            SCSI_DEVINFO_GLOBAL);
 566 }
 567
 568
 569 /**
 570  * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
 571  * @sdev:       &scsi_device to get flags for
 572  * @vendor:     vendor name
 573  * @model:      model name
 574  * @key:        list to look up
 575  *
 576  * Description:
 577  *     Search the scsi_dev_info_list specified by @key for an entry
 578  *     matching @vendor and @model, if found, return the matching
 579  *     flags value, else return the host or global default settings.
 580  *     Called during scan time.
 581  **/
 582 int scsi_get_device_flags_keyed(struct scsi_device *sdev,
 583                                 const unsigned char *vendor,
 584                                 const unsigned char *model,
 585                                 int key)
 586 {
 587         struct scsi_dev_info_list *devinfo;
 588
 589         devinfo = scsi_dev_info_list_find(vendor, model, key);
 590         if (!IS_ERR(devinfo))
 591                 return devinfo->flags;
 592
 593         /* key or device not found: return nothing */
 594         if (key != SCSI_DEVINFO_GLOBAL)
 595                 return 0;
 596
 597         /* except for the global list, where we have an exception */
 598         if (sdev->sdev_bflags)
 599                 return sdev->sdev_bflags;
 600
 601         return scsi_default_dev_flags;
 602 }
 603 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
 604
 605 #ifdef CONFIG_SCSI_PROC_FS
 606 struct double_list {
 607         struct list_head *top;
 608         struct list_head *bottom;
 609 };
 610
 611 static int devinfo_seq_show(struct seq_file *m, void *v)
 612 {
 613         struct double_list *dl = v;
 614         struct scsi_dev_info_list_table *devinfo_table =
 615                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 616         struct scsi_dev_info_list *devinfo =
 617                 list_entry(dl->bottom, struct scsi_dev_info_list,
 618                            dev_info_list);
 619
 620         if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
 621             devinfo_table->name)
 622                 seq_printf(m, "[%s]:\n", devinfo_table->name);
 623
 624         seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
 625                    devinfo->vendor, devinfo->model, devinfo->flags);
 626         return 0;
 627 }
 628
 629 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
 630 {
 631         struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
 632         loff_t pos = *ppos;
 633
 634         if (!dl)
 635                 return NULL;
 636
 637         list_for_each(dl->top, &scsi_dev_info_list) {
 638                 struct scsi_dev_info_list_table *devinfo_table =
 639                         list_entry(dl->top, struct scsi_dev_info_list_table,
 640                                    node);
 641                 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
 642                         if (pos-- == 0)
 643                                 return dl;
 644         }
 645
 646         kfree(dl);
 647         return NULL;
 648 }
 649
 650 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
 651 {
 652         struct double_list *dl = v;
 653         struct scsi_dev_info_list_table *devinfo_table =
 654                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 655
 656         ++*ppos;
 657         dl->bottom = dl->bottom->next;
 658         while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
 659                 dl->top = dl->top->next;
 660                 if (dl->top == &scsi_dev_info_list) {
 661                         kfree(dl);
 662                         return NULL;
 663                 }
 664                 devinfo_table = list_entry(dl->top,
 665                                            struct scsi_dev_info_list_table,
 666                                            node);
 667                 dl->bottom = devinfo_table->scsi_dev_info_list.next;
 668         }
 669
 670         return dl;
 671 }
 672
 673 static void devinfo_seq_stop(struct seq_file *m, void *v)
 674 {
 675         kfree(v);
 676 }
 677
 678 static const struct seq_operations scsi_devinfo_seq_ops = {
 679         .start  = devinfo_seq_start,
 680         .next   = devinfo_seq_next,
 681         .stop   = devinfo_seq_stop,
 682         .show   = devinfo_seq_show,
 683 };
 684
 685 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 686 {
 687         return seq_open(file, &scsi_devinfo_seq_ops);
 688 }
 689
 690 /*
 691  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 692  *
 693  * Description: Adds a black/white list entry for vendor and model with an
 694  * integer value of flag to the scsi device info list.
 695  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 696  */
 697 static ssize_t proc_scsi_devinfo_write(struct file *file,
 698                                        const char __user *buf,
 699                                        size_t length, loff_t *ppos)
 700 {
 701         char *buffer;
 702         ssize_t err = length;
 703
 704         if (!buf || length>PAGE_SIZE)
 705                 return -EINVAL;
 706         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 707                 return -ENOMEM;
 708         if (copy_from_user(buffer, buf, length)) {
 709                 err =-EFAULT;
 710                 goto out;
 711         }
 712
 713         if (length < PAGE_SIZE)
 714                 buffer[length] = '\0';
 715         else if (buffer[PAGE_SIZE-1]) {
 716                 err = -EINVAL;
 717                 goto out;
 718         }
 719
 720         scsi_dev_info_list_add_str(buffer);
 721
 722 out:
 723         free_page((unsigned long)buffer);
 724         return err;
 725 }
 726
 727 static const struct file_operations scsi_devinfo_proc_fops = {
 728         .owner          = THIS_MODULE,
 729         .open           = proc_scsi_devinfo_open,
 730         .read           = seq_read,
 731         .write          = proc_scsi_devinfo_write,
 732         .llseek         = seq_lseek,
 733         .release        = seq_release,
 734 };
 735 #endif /* CONFIG_SCSI_PROC_FS */
 736
 737 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 738 MODULE_PARM_DESC(dev_flags,
 739          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 740          " list entries for vendor and model with an integer value of flags"
 741          " to the scsi device info list");
 742
 743 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 744 MODULE_PARM_DESC(default_dev_flags,
 745                  "scsi default device flag integer value");
 746
 747 /**
 748  * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 749  **/
 750 void scsi_exit_devinfo(void)
 751 {
 752 #ifdef CONFIG_SCSI_PROC_FS
 753         remove_proc_entry("scsi/device_info", NULL);
 754 #endif
 755
 756         scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 757 }
 758
 759 /**
 760  * scsi_dev_info_add_list - add a new devinfo list
 761  * @key:        key of the list to add
 762  * @name:       Name of the list to add (for /proc/scsi/device_info)
 763  *
 764  * Adds the requested list, returns zero on success, -EEXIST if the
 765  * key is already registered to a list, or other error on failure.
 766  */
 767 int scsi_dev_info_add_list(int key, const char *name)
 768 {
 769         struct scsi_dev_info_list_table *devinfo_table =
 770                 scsi_devinfo_lookup_by_key(key);
 771
 772         if (!IS_ERR(devinfo_table))
 773                 /* list already exists */
 774                 return -EEXIST;
 775
 776         devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 777
 778         if (!devinfo_table)
 779                 return -ENOMEM;
 780
 781         INIT_LIST_HEAD(&devinfo_table->node);
 782         INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 783         devinfo_table->name = name;
 784         devinfo_table->key = key;
 785         list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 786
 787         return 0;
 788 }
 789 EXPORT_SYMBOL(scsi_dev_info_add_list);
 790
 791 /**
 792  * scsi_dev_info_remove_list - destroy an added devinfo list
 793  * @key: key of the list to destroy
 794  *
 795  * Iterates over the entire list first, freeing all the values, then
 796  * frees the list itself.  Returns 0 on success or -EINVAL if the key
 797  * can't be found.
 798  */
 799 int scsi_dev_info_remove_list(int key)
 800 {
 801         struct list_head *lh, *lh_next;
 802         struct scsi_dev_info_list_table *devinfo_table =
 803                 scsi_devinfo_lookup_by_key(key);
 804
 805         if (IS_ERR(devinfo_table))
 806                 /* no such list */
 807                 return -EINVAL;
 808
 809         /* remove from the master list */
 810         list_del(&devinfo_table->node);
 811
 812         list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 813                 struct scsi_dev_info_list *devinfo;
 814
 815                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 816                                      dev_info_list);
 817                 kfree(devinfo);
 818         }
 819         kfree(devinfo_table);
 820
 821         return 0;
 822 }
 823 EXPORT_SYMBOL(scsi_dev_info_remove_list);
 824
 825 /**
 826  * scsi_init_devinfo - set up the dynamic device list.
 827  *
 828  * Description:
 829  *      Add command line entries from scsi_dev_flags, then add
 830  *      scsi_static_device_list entries to the scsi device info list.
 831  */
 832 int __init scsi_init_devinfo(void)
 833 {
 834 #ifdef CONFIG_SCSI_PROC_FS
 835         struct proc_dir_entry *p;
 836 #endif
 837         int error, i;
 838
 839         error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 840         if (error)
 841                 return error;
 842
 843         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 844         if (error)
 845                 goto out;
 846
 847         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 848                 error = scsi_dev_info_list_add(1 /* compatibile */,
 849                                 scsi_static_device_list[i].vendor,
 850                                 scsi_static_device_list[i].model,
 851                                 NULL,
 852                                 scsi_static_device_list[i].flags);
 853                 if (error)
 854                         goto out;
 855         }
 856
 857 #ifdef CONFIG_SCSI_PROC_FS
 858         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
 859         if (!p) {
 860                 error = -ENOMEM;
 861                 goto out;
 862         }
 863 #endif /* CONFIG_SCSI_PROC_FS */
 864
 865  out:
 866         if (error)
 867                 scsi_exit_devinfo();
 868         return error;
 869 }