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         {"Marvell", "91xx Config", "1.01", BLIST_SKIP_VPD_PAGES},
 210         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 211         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 212         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 213         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 214         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 215         {"MICROP", "4110", NULL, BLIST_NOTQ},
 216         {"MSFT", "Virtual HD", NULL, BLIST_NO_RSOC},
 217         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 218         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 219         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 220         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 221         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 222         {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 223         {"NETAPP", "LUN C-Mode", NULL, BLIST_SYNC_ALUA},
 224         {"NETAPP", "INF-01-00", NULL, BLIST_SYNC_ALUA},
 225         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 226         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 227         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 228         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 229         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 230         {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 231         {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
 232         {"Promise", "", NULL, BLIST_SPARSELUN},
 233         {"QEMU", "QEMU CD-ROM", NULL, BLIST_SKIP_VPD_PAGES},
 234         {"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
 235         {"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
 236         {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 237         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 238         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 239         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 240         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 241         {"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
 242         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 243         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 244         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 245         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 246         {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 247         {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 248         {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 249         {"STK", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 250         {"NETAPP", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 251         {"LSI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 252         {"ENGENIO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 253         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 254         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 255         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 256         {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 257         {"SUN", "T300", "*", BLIST_SPARSELUN},
 258         {"SUN", "T4", "*", BLIST_SPARSELUN},
 259         {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
 260         {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 261         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 262         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 263         {"Traxdata", "CDR4120", NULL, BLIST_NOLUN},     /* locks up */
 264         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 265         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 266         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 267         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 268         {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 269         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 270         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 271         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 272         { NULL, NULL, NULL, 0 },
 273 };
 274
 275 static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
 276 {
 277         struct scsi_dev_info_list_table *devinfo_table;
 278         int found = 0;
 279
 280         list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
 281                 if (devinfo_table->key == key) {
 282                         found = 1;
 283                         break;
 284                 }
 285         if (!found)
 286                 return ERR_PTR(-EINVAL);
 287
 288         return devinfo_table;
 289 }
 290
 291 /*
 292  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 293  * devinfo vendor and model strings.
 294  */
 295 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 296                                 char *from, int compatible)
 297 {
 298         size_t from_length;
 299
 300         from_length = strlen(from);
 301         strncpy(to, from, min(to_length, from_length));
 302         if (from_length < to_length) {
 303                 if (compatible) {
 304                         /*
 305                          * NUL terminate the string if it is short.
 306                          */
 307                         to[from_length] = '\0';
 308                 } else {
 309                         /*
 310                          * space pad the string if it is short.
 311                          */
 312                         strncpy(&to[from_length], spaces,
 313                                 to_length - from_length);
 314                 }
 315         }
 316         if (from_length > to_length)
 317                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 318                         __func__, name, from);
 319 }
 320
 321 /**
 322  * scsi_dev_info_list_add - add one dev_info list entry.
 323  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 324  * @vendor:     vendor string
 325  * @model:      model (product) string
 326  * @strflags:   integer string
 327  * @flags:      if strflags NULL, use this flag value
 328  *
 329  * Description:
 330  *      Create and add one dev_info entry for @vendor, @model, @strflags or
 331  *      @flag. If @compatible, add to the tail of the list, do not space
 332  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 333  *      are added with @compatible 1 and @clfags NULL.
 334  *
 335  * Returns: 0 OK, -error on failure.
 336  **/
 337 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 338                             char *strflags, int flags)
 339 {
 340         return scsi_dev_info_list_add_keyed(compatible, vendor, model,
 341                                             strflags, flags,
 342                                             SCSI_DEVINFO_GLOBAL);
 343 }
 344
 345 /**
 346  * scsi_dev_info_list_add_keyed - add one dev_info list entry.
 347  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 348  * @vendor:     vendor string
 349  * @model:      model (product) string
 350  * @strflags:   integer string
 351  * @flags:      if strflags NULL, use this flag value
 352  * @key:        specify list to use
 353  *
 354  * Description:
 355  *      Create and add one dev_info entry for @vendor, @model,
 356  *      @strflags or @flag in list specified by @key. If @compatible,
 357  *      add to the tail of the list, do not space pad, and set
 358  *      devinfo->compatible. The scsi_static_device_list entries are
 359  *      added with @compatible 1 and @clfags NULL.
 360  *
 361  * Returns: 0 OK, -error on failure.
 362  **/
 363 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
 364                                  char *strflags, int flags, int key)
 365 {
 366         struct scsi_dev_info_list *devinfo;
 367         struct scsi_dev_info_list_table *devinfo_table =
 368                 scsi_devinfo_lookup_by_key(key);
 369
 370         if (IS_ERR(devinfo_table))
 371                 return PTR_ERR(devinfo_table);
 372
 373         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 374         if (!devinfo) {
 375                 printk(KERN_ERR "%s: no memory\n", __func__);
 376                 return -ENOMEM;
 377         }
 378
 379         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 380                             vendor, compatible);
 381         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 382                             model, compatible);
 383
 384         if (strflags)
 385                 devinfo->flags = simple_strtoul(strflags, NULL, 0);
 386         else
 387                 devinfo->flags = flags;
 388
 389         devinfo->compatible = compatible;
 390
 391         if (compatible)
 392                 list_add_tail(&devinfo->dev_info_list,
 393                               &devinfo_table->scsi_dev_info_list);
 394         else
 395                 list_add(&devinfo->dev_info_list,
 396                          &devinfo_table->scsi_dev_info_list);
 397
 398         return 0;
 399 }
 400 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
 401
 402 /**
 403  * scsi_dev_info_list_find - find a matching dev_info list entry.
 404  * @vendor:     vendor string
 405  * @model:      model (product) string
 406  * @key:        specify list to use
 407  *
 408  * Description:
 409  *      Finds the first dev_info entry matching @vendor, @model
 410  *      in list specified by @key.
 411  *
 412  * Returns: pointer to matching entry, or ERR_PTR on failure.
 413  **/
 414 static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
 415                 const char *model, int key)
 416 {
 417         struct scsi_dev_info_list *devinfo;
 418         struct scsi_dev_info_list_table *devinfo_table =
 419                 scsi_devinfo_lookup_by_key(key);
 420         size_t vmax, mmax;
 421         const char *vskip, *mskip;
 422
 423         if (IS_ERR(devinfo_table))
 424                 return (struct scsi_dev_info_list *) devinfo_table;
 425
 426         /* Prepare for "compatible" matches */
 427
 428         /*
 429          * XXX why skip leading spaces? If an odd INQUIRY
 430          * value, that should have been part of the
 431          * scsi_static_device_list[] entry, such as "  FOO"
 432          * rather than "FOO". Since this code is already
 433          * here, and we don't know what device it is
 434          * trying to work with, leave it as-is.
 435          */
 436         vmax = sizeof(devinfo->vendor);
 437         vskip = vendor;
 438         while (vmax > 0 && *vskip == ' ') {
 439                 vmax--;
 440                 vskip++;
 441         }
 442         /* Also skip trailing spaces */
 443         while (vmax > 0 && vskip[vmax - 1] == ' ')
 444                 --vmax;
 445
 446         mmax = sizeof(devinfo->model);
 447         mskip = model;
 448         while (mmax > 0 && *mskip == ' ') {
 449                 mmax--;
 450                 mskip++;
 451         }
 452         while (mmax > 0 && mskip[mmax - 1] == ' ')
 453                 --mmax;
 454
 455         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 456                             dev_info_list) {
 457                 if (devinfo->compatible) {
 458                         /*
 459                          * Behave like the older version of get_device_flags.
 460                          */
 461                         if (memcmp(devinfo->vendor, vskip, vmax) ||
 462                                         (vmax < sizeof(devinfo->vendor) &&
 463                                                 devinfo->vendor[vmax]))
 464                                 continue;
 465                         if (memcmp(devinfo->model, mskip, mmax) ||
 466                                         (mmax < sizeof(devinfo->model) &&
 467                                                 devinfo->model[mmax]))
 468                                 continue;
 469                         return devinfo;
 470                 } else {
 471                         if (!memcmp(devinfo->vendor, vendor,
 472                                      sizeof(devinfo->vendor)) &&
 473                              !memcmp(devinfo->model, model,
 474                                       sizeof(devinfo->model)))
 475                                 return devinfo;
 476                 }
 477         }
 478
 479         return ERR_PTR(-ENOENT);
 480 }
 481
 482 /**
 483  * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
 484  * @vendor:     vendor string
 485  * @model:      model (product) string
 486  * @key:        specify list to use
 487  *
 488  * Description:
 489  *      Remove and destroy one dev_info entry for @vendor, @model
 490  *      in list specified by @key.
 491  *
 492  * Returns: 0 OK, -error on failure.
 493  **/
 494 int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key)
 495 {
 496         struct scsi_dev_info_list *found;
 497
 498         found = scsi_dev_info_list_find(vendor, model, key);
 499         if (IS_ERR(found))
 500                 return PTR_ERR(found);
 501
 502         list_del(&found->dev_info_list);
 503         kfree(found);
 504         return 0;
 505 }
 506 EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
 507
 508 /**
 509  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 510  * @dev_list:   string of device flags to add
 511  *
 512  * Description:
 513  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 514  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 515  *      dev_list is modified via strsep. Can be called for command line
 516  *      addition, for proc or mabye a sysfs interface.
 517  *
 518  * Returns: 0 if OK, -error on failure.
 519  **/
 520 static int scsi_dev_info_list_add_str(char *dev_list)
 521 {
 522         char *vendor, *model, *strflags, *next;
 523         char *next_check;
 524         int res = 0;
 525
 526         next = dev_list;
 527         if (next && next[0] == '"') {
 528                 /*
 529                  * Ignore both the leading and trailing quote.
 530                  */
 531                 next++;
 532                 next_check = ",\"";
 533         } else {
 534                 next_check = ",";
 535         }
 536
 537         /*
 538          * For the leading and trailing '"' case, the for loop comes
 539          * through the last time with vendor[0] == '\0'.
 540          */
 541         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 542              && (res == 0); vendor = strsep(&next, ":")) {
 543                 strflags = NULL;
 544                 model = strsep(&next, ":");
 545                 if (model)
 546                         strflags = strsep(&next, next_check);
 547                 if (!model || !strflags) {
 548                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 549                                " '%s'\n", __func__, vendor, model,
 550                                strflags);
 551                         res = -EINVAL;
 552                 } else
 553                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 554                                                      model, strflags, 0);
 555         }
 556         return res;
 557 }
 558
 559 /**
 560  * get_device_flags - get device specific flags from the dynamic device list.
 561  * @sdev:       &scsi_device to get flags for
 562  * @vendor:     vendor name
 563  * @model:      model name
 564  *
 565  * Description:
 566  *     Search the global scsi_dev_info_list (specified by list zero)
 567  *     for an entry matching @vendor and @model, if found, return the
 568  *     matching flags value, else return the host or global default
 569  *     settings.  Called during scan time.
 570  **/
 571 int scsi_get_device_flags(struct scsi_device *sdev,
 572                           const unsigned char *vendor,
 573                           const unsigned char *model)
 574 {
 575         return scsi_get_device_flags_keyed(sdev, vendor, model,
 576                                            SCSI_DEVINFO_GLOBAL);
 577 }
 578
 579
 580 /**
 581  * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
 582  * @sdev:       &scsi_device to get flags for
 583  * @vendor:     vendor name
 584  * @model:      model name
 585  * @key:        list to look up
 586  *
 587  * Description:
 588  *     Search the scsi_dev_info_list specified by @key for an entry
 589  *     matching @vendor and @model, if found, return the matching
 590  *     flags value, else return the host or global default settings.
 591  *     Called during scan time.
 592  **/
 593 int scsi_get_device_flags_keyed(struct scsi_device *sdev,
 594                                 const unsigned char *vendor,
 595                                 const unsigned char *model,
 596                                 int key)
 597 {
 598         struct scsi_dev_info_list *devinfo;
 599         int err;
 600
 601         devinfo = scsi_dev_info_list_find(vendor, model, key);
 602         if (!IS_ERR(devinfo))
 603                 return devinfo->flags;
 604
 605         err = PTR_ERR(devinfo);
 606         if (err != -ENOENT)
 607                 return err;
 608
 609         /* nothing found, return nothing */
 610         if (key != SCSI_DEVINFO_GLOBAL)
 611                 return 0;
 612
 613         /* except for the global list, where we have an exception */
 614         if (sdev->sdev_bflags)
 615                 return sdev->sdev_bflags;
 616
 617         return scsi_default_dev_flags;
 618 }
 619 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
 620
 621 #ifdef CONFIG_SCSI_PROC_FS
 622 struct double_list {
 623         struct list_head *top;
 624         struct list_head *bottom;
 625 };
 626
 627 static int devinfo_seq_show(struct seq_file *m, void *v)
 628 {
 629         struct double_list *dl = v;
 630         struct scsi_dev_info_list_table *devinfo_table =
 631                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 632         struct scsi_dev_info_list *devinfo =
 633                 list_entry(dl->bottom, struct scsi_dev_info_list,
 634                            dev_info_list);
 635
 636         if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
 637             devinfo_table->name)
 638                 seq_printf(m, "[%s]:\n", devinfo_table->name);
 639
 640         seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
 641                    devinfo->vendor, devinfo->model, devinfo->flags);
 642         return 0;
 643 }
 644
 645 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
 646 {
 647         struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
 648         loff_t pos = *ppos;
 649
 650         if (!dl)
 651                 return NULL;
 652
 653         list_for_each(dl->top, &scsi_dev_info_list) {
 654                 struct scsi_dev_info_list_table *devinfo_table =
 655                         list_entry(dl->top, struct scsi_dev_info_list_table,
 656                                    node);
 657                 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
 658                         if (pos-- == 0)
 659                                 return dl;
 660         }
 661
 662         kfree(dl);
 663         return NULL;
 664 }
 665
 666 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
 667 {
 668         struct double_list *dl = v;
 669         struct scsi_dev_info_list_table *devinfo_table =
 670                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 671
 672         ++*ppos;
 673         dl->bottom = dl->bottom->next;
 674         while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
 675                 dl->top = dl->top->next;
 676                 if (dl->top == &scsi_dev_info_list) {
 677                         kfree(dl);
 678                         return NULL;
 679                 }
 680                 devinfo_table = list_entry(dl->top,
 681                                            struct scsi_dev_info_list_table,
 682                                            node);
 683                 dl->bottom = devinfo_table->scsi_dev_info_list.next;
 684         }
 685
 686         return dl;
 687 }
 688
 689 static void devinfo_seq_stop(struct seq_file *m, void *v)
 690 {
 691         kfree(v);
 692 }
 693
 694 static const struct seq_operations scsi_devinfo_seq_ops = {
 695         .start  = devinfo_seq_start,
 696         .next   = devinfo_seq_next,
 697         .stop   = devinfo_seq_stop,
 698         .show   = devinfo_seq_show,
 699 };
 700
 701 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 702 {
 703         return seq_open(file, &scsi_devinfo_seq_ops);
 704 }
 705
 706 /*
 707  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 708  *
 709  * Description: Adds a black/white list entry for vendor and model with an
 710  * integer value of flag to the scsi device info list.
 711  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 712  */
 713 static ssize_t proc_scsi_devinfo_write(struct file *file,
 714                                        const char __user *buf,
 715                                        size_t length, loff_t *ppos)
 716 {
 717         char *buffer;
 718         ssize_t err = length;
 719
 720         if (!buf || length>PAGE_SIZE)
 721                 return -EINVAL;
 722         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 723                 return -ENOMEM;
 724         if (copy_from_user(buffer, buf, length)) {
 725                 err =-EFAULT;
 726                 goto out;
 727         }
 728
 729         if (length < PAGE_SIZE)
 730                 buffer[length] = '\0';
 731         else if (buffer[PAGE_SIZE-1]) {
 732                 err = -EINVAL;
 733                 goto out;
 734         }
 735
 736         scsi_dev_info_list_add_str(buffer);
 737
 738 out:
 739         free_page((unsigned long)buffer);
 740         return err;
 741 }
 742
 743 static const struct file_operations scsi_devinfo_proc_fops = {
 744         .owner          = THIS_MODULE,
 745         .open           = proc_scsi_devinfo_open,
 746         .read           = seq_read,
 747         .write          = proc_scsi_devinfo_write,
 748         .llseek         = seq_lseek,
 749         .release        = seq_release,
 750 };
 751 #endif /* CONFIG_SCSI_PROC_FS */
 752
 753 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 754 MODULE_PARM_DESC(dev_flags,
 755          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 756          " list entries for vendor and model with an integer value of flags"
 757          " to the scsi device info list");
 758
 759 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 760 MODULE_PARM_DESC(default_dev_flags,
 761                  "scsi default device flag integer value");
 762
 763 /**
 764  * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 765  **/
 766 void scsi_exit_devinfo(void)
 767 {
 768 #ifdef CONFIG_SCSI_PROC_FS
 769         remove_proc_entry("scsi/device_info", NULL);
 770 #endif
 771
 772         scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 773 }
 774
 775 /**
 776  * scsi_dev_info_add_list - add a new devinfo list
 777  * @key:        key of the list to add
 778  * @name:       Name of the list to add (for /proc/scsi/device_info)
 779  *
 780  * Adds the requested list, returns zero on success, -EEXIST if the
 781  * key is already registered to a list, or other error on failure.
 782  */
 783 int scsi_dev_info_add_list(int key, const char *name)
 784 {
 785         struct scsi_dev_info_list_table *devinfo_table =
 786                 scsi_devinfo_lookup_by_key(key);
 787
 788         if (!IS_ERR(devinfo_table))
 789                 /* list already exists */
 790                 return -EEXIST;
 791
 792         devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 793
 794         if (!devinfo_table)
 795                 return -ENOMEM;
 796
 797         INIT_LIST_HEAD(&devinfo_table->node);
 798         INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 799         devinfo_table->name = name;
 800         devinfo_table->key = key;
 801         list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 802
 803         return 0;
 804 }
 805 EXPORT_SYMBOL(scsi_dev_info_add_list);
 806
 807 /**
 808  * scsi_dev_info_remove_list - destroy an added devinfo list
 809  * @key: key of the list to destroy
 810  *
 811  * Iterates over the entire list first, freeing all the values, then
 812  * frees the list itself.  Returns 0 on success or -EINVAL if the key
 813  * can't be found.
 814  */
 815 int scsi_dev_info_remove_list(int key)
 816 {
 817         struct list_head *lh, *lh_next;
 818         struct scsi_dev_info_list_table *devinfo_table =
 819                 scsi_devinfo_lookup_by_key(key);
 820
 821         if (IS_ERR(devinfo_table))
 822                 /* no such list */
 823                 return -EINVAL;
 824
 825         /* remove from the master list */
 826         list_del(&devinfo_table->node);
 827
 828         list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 829                 struct scsi_dev_info_list *devinfo;
 830
 831                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 832                                      dev_info_list);
 833                 kfree(devinfo);
 834         }
 835         kfree(devinfo_table);
 836
 837         return 0;
 838 }
 839 EXPORT_SYMBOL(scsi_dev_info_remove_list);
 840
 841 /**
 842  * scsi_init_devinfo - set up the dynamic device list.
 843  *
 844  * Description:
 845  *      Add command line entries from scsi_dev_flags, then add
 846  *      scsi_static_device_list entries to the scsi device info list.
 847  */
 848 int __init scsi_init_devinfo(void)
 849 {
 850 #ifdef CONFIG_SCSI_PROC_FS
 851         struct proc_dir_entry *p;
 852 #endif
 853         int error, i;
 854
 855         error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 856         if (error)
 857                 return error;
 858
 859         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 860         if (error)
 861                 goto out;
 862
 863         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 864                 error = scsi_dev_info_list_add(1 /* compatibile */,
 865                                 scsi_static_device_list[i].vendor,
 866                                 scsi_static_device_list[i].model,
 867                                 NULL,
 868                                 scsi_static_device_list[i].flags);
 869                 if (error)
 870                         goto out;
 871         }
 872
 873 #ifdef CONFIG_SCSI_PROC_FS
 874         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
 875         if (!p) {
 876                 error = -ENOMEM;
 877                 goto out;
 878         }
 879 #endif /* CONFIG_SCSI_PROC_FS */
 880
 881  out:
 882         if (error)
 883                 scsi_exit_devinfo();
 884         return error;
 885 }