drivers/scsi/scsi_devinfo.c

   1
   2 #include <linux/blkdev.h>
   3 #include <linux/init.h>
   4 #include <linux/kernel.h>
   5 #include <linux/module.h>
   6 #include <linux/moduleparam.h>
   7 #include <linux/proc_fs.h>
   8 #include <linux/seq_file.h>
   9 #include <linux/slab.h>
  10
  11 #include <scsi/scsi_device.h>
  12 #include <scsi/scsi_devinfo.h>
  13
  14 #include "scsi_priv.h"
  15
  16
  17 /*
  18  * scsi_dev_info_list: structure to hold black/white listed devices.
  19  */
  20 struct scsi_dev_info_list {
  21         struct list_head dev_info_list;
  22         char vendor[8];
  23         char model[16];
  24         unsigned flags;
  25         unsigned compatible; /* for use with scsi_static_device_list entries */
  26 };
  27
  28 struct scsi_dev_info_list_table {
  29         struct list_head node;  /* our node for being on the master list */
  30         struct list_head scsi_dev_info_list; /* head of dev info list */
  31         const char *name;       /* name of list for /proc (NULL for global) */
  32         int key;                /* unique numeric identifier */
  33 };
  34
  35
  36 static const char spaces[] = "                "; /* 16 of them */
  37 static unsigned scsi_default_dev_flags;
  38 static LIST_HEAD(scsi_dev_info_list);
  39 static char scsi_dev_flags[256];
  40
  41 /*
  42  * scsi_static_device_list: deprecated list of devices that require
  43  * settings that differ from the default, includes black-listed (broken)
  44  * devices. The entries here are added to the tail of scsi_dev_info_list
  45  * via scsi_dev_info_list_init.
  46  *
  47  * Do not add to this list, use the command line or proc interface to add
  48  * to the scsi_dev_info_list. This table will eventually go away.
  49  */
  50 static struct {
  51         char *vendor;
  52         char *model;
  53         char *revision; /* revision known to be bad, unused */
  54         unsigned flags;
  55 } scsi_static_device_list[] __initdata = {
  56         /*
  57          * The following devices are known not to tolerate a lun != 0 scan
  58          * for one reason or another. Some will respond to all luns,
  59          * others will lock up.
  60          */
  61         {"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN},     /* locks up */
  62         {"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN},       /* locks up */
  63         {"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN},       /* locks up */
  64         {"DENON", "DRD-25X", "V", BLIST_NOLUN},                 /* locks up */
  65         {"HITACHI", "DK312C", "CM81", BLIST_NOLUN},     /* responds to all lun */
  66         {"HITACHI", "DK314C", "CR21", BLIST_NOLUN},     /* responds to all lun */
  67         {"IBM", "2104-DU3", NULL, BLIST_NOLUN},         /* locks up */
  68         {"IBM", "2104-TU3", NULL, BLIST_NOLUN},         /* locks up */
  69         {"IMS", "CDD521/10", "2.06", BLIST_NOLUN},      /* locks up */
  70         {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN},     /* locks up */
  71         {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN},     /* locks up */
  72         {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN},   /* locks up */
  73         {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN},     /* locks up */
  74         {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN},     /* locks up */
  75         {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN},    /* responds to all lun */
  76         {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN},      /* responds to all lun */
  77         {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
  78         {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN},    /* responds to all lun */
  79         {"RODIME", "RO3000S", "2.33", BLIST_NOLUN},     /* locks up */
  80         {"SUN", "SENA", NULL, BLIST_NOLUN},             /* responds to all luns */
  81         /*
  82          * The following causes a failed REQUEST SENSE on lun 1 for
  83          * aha152x controller, which causes SCSI code to reset bus.
  84          */
  85         {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
  86         /*
  87          * The following causes a failed REQUEST SENSE on lun 1 for
  88          * aha152x controller, which causes SCSI code to reset bus.
  89          */
  90         {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
  91         {"SEAGATE", "ST296", "921", BLIST_NOLUN},       /* responds to all lun */
  92         {"SEAGATE", "ST1581", "6538", BLIST_NOLUN},     /* responds to all lun */
  93         {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
  94         {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
  95         {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
  96         {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
  97         {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
  98         {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN},   /* locks up */
  99         {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN},       /* locks up */
 100         /*
 101          * The following causes a failed REQUEST SENSE on lun 1 for
 102          * seagate controller, which causes SCSI code to reset bus.
 103          */
 104         {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
 105         {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN},        /* responds to all lun */
 106         /*
 107          * The following causes a failed REQUEST SENSE on lun 1 for
 108          * seagate controller, which causes SCSI code to reset bus.
 109          */
 110         {"HP", "C1750A", "3226", BLIST_NOLUN},          /* scanjet iic */
 111         {"HP", "C1790A", "", BLIST_NOLUN},              /* scanjet iip */
 112         {"HP", "C2500A", "", BLIST_NOLUN},              /* scanjet iicx */
 113         {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
 114         {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN},      /* responds to all lun */
 115         {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN},     /* locks up */
 116         {"NEC", "D3856", "0009", BLIST_NOLUN},
 117         {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN},    /* locks up */
 118         {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN},    /* locks up */
 119         {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN},    /* locks up */
 120         {"RELISYS", "Scorpio", NULL, BLIST_NOLUN},      /* responds to all lun */
 121         {"SANKYO", "CP525", "6.64", BLIST_NOLUN},       /* causes failed REQ SENSE, extra reset */
 122         {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
 123         {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
 124         {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN},      /* locks up */
 125         {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN},      /* locks up */
 126         {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN},     /* locks up */
 127         {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN},    /* locks up */
 128         {"", "Scanner", "1.80", BLIST_NOLUN},   /* responds to all lun */
 129
 130         /*
 131          * Other types of devices that have special flags.
 132          * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
 133          */
 134         {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
 135         {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
 136         {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
 137         {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
 138         {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_FORCELUN | BLIST_INQUIRY_36},
 139         {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
 140         {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
 141         {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
 142         {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
 143         {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
 144         {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
 145         {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
 146         {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
 147                 BLIST_MAX_512 | BLIST_REPORTLUN2},      /* Compaq RA4x00 */
 148         {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
 149         {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
 150         {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 151         {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 152         {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 153         {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
 154         {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 155         {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
 156         {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
 157         {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
 158         {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
 159         {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
 160         {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
 161         {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
 162         {"EMC",  "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 163         {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
 164         {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
 165         {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
 166         {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
 167         {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
 168         {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 169         {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
 170         {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
 171         {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
 172         {"HITACHI", "DF400", "*", BLIST_REPORTLUN2},
 173         {"HITACHI", "DF500", "*", BLIST_REPORTLUN2},
 174         {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
 175         {"HITACHI", "HUS1530", "*", BLIST_NO_DIF},
 176         {"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2},
 177         {"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 178         {"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 179         {"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 180         {"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 181         {"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 182         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 183         {"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
 184         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 185         {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 186         {"HP", "C1557A", NULL, BLIST_FORCELUN},
 187         {"HP", "C3323-300", "4269", BLIST_NOTQ},
 188         {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
 189         {"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 190         {"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 191         {"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 192         {"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 193         {"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 194         {"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 195         {"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 196         {"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 197         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 198         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 199         {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
 200         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 201         {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
 202         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 203         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 204         {"INSITE", "I325VM", NULL, BLIST_KEY},
 205         {"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
 206         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 207         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 208         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 209         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 210         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 211         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 212         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 213         {"MICROP", "4110", NULL, BLIST_NOTQ},
 214         {"MSFT", "Virtual HD", NULL, BLIST_NO_RSOC},
 215         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 216         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 217         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 218         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 219         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 220         {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 221         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 222         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 223         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 224         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 225         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 226         {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 227         {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
 228         {"Promise", "", NULL, BLIST_SPARSELUN},
 229         {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 230         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 231         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 232         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 233         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 234         {"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
 235         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 236         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 237         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 238         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 239         {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 240         {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 241         {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 242         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 243         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 244         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 245         {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 246         {"SUN", "T300", "*", BLIST_SPARSELUN},
 247         {"SUN", "T4", "*", BLIST_SPARSELUN},
 248         {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
 249         {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 250         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 251         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 252         {"Traxdata", "CDR4120", NULL, BLIST_NOLUN},     /* locks up */
 253         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 254         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 255         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 256         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 257         {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 258         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 259         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 260         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 261         { NULL, NULL, NULL, 0 },
 262 };
 263
 264 static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
 265 {
 266         struct scsi_dev_info_list_table *devinfo_table;
 267         int found = 0;
 268
 269         list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
 270                 if (devinfo_table->key == key) {
 271                         found = 1;
 272                         break;
 273                 }
 274         if (!found)
 275                 return ERR_PTR(-EINVAL);
 276
 277         return devinfo_table;
 278 }
 279
 280 /*
 281  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 282  * devinfo vendor and model strings.
 283  */
 284 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 285                                 char *from, int compatible)
 286 {
 287         size_t from_length;
 288
 289         from_length = strlen(from);
 290         strncpy(to, from, min(to_length, from_length));
 291         if (from_length < to_length) {
 292                 if (compatible) {
 293                         /*
 294                          * NUL terminate the string if it is short.
 295                          */
 296                         to[from_length] = '\0';
 297                 } else {
 298                         /*
 299                          * space pad the string if it is short.
 300                          */
 301                         strncpy(&to[from_length], spaces,
 302                                 to_length - from_length);
 303                 }
 304         }
 305         if (from_length > to_length)
 306                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 307                         __func__, name, from);
 308 }
 309
 310 /**
 311  * scsi_dev_info_list_add - add one dev_info list entry.
 312  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 313  * @vendor:     vendor string
 314  * @model:      model (product) string
 315  * @strflags:   integer string
 316  * @flags:      if strflags NULL, use this flag value
 317  *
 318  * Description:
 319  *      Create and add one dev_info entry for @vendor, @model, @strflags or
 320  *      @flag. If @compatible, add to the tail of the list, do not space
 321  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 322  *      are added with @compatible 1 and @clfags NULL.
 323  *
 324  * Returns: 0 OK, -error on failure.
 325  **/
 326 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 327                             char *strflags, int flags)
 328 {
 329         return scsi_dev_info_list_add_keyed(compatible, vendor, model,
 330                                             strflags, flags,
 331                                             SCSI_DEVINFO_GLOBAL);
 332 }
 333
 334 /**
 335  * scsi_dev_info_list_add_keyed - add one dev_info list entry.
 336  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 337  * @vendor:     vendor string
 338  * @model:      model (product) string
 339  * @strflags:   integer string
 340  * @flags:      if strflags NULL, use this flag value
 341  * @key:        specify list to use
 342  *
 343  * Description:
 344  *      Create and add one dev_info entry for @vendor, @model,
 345  *      @strflags or @flag in list specified by @key. If @compatible,
 346  *      add to the tail of the list, do not space pad, and set
 347  *      devinfo->compatible. The scsi_static_device_list entries are
 348  *      added with @compatible 1 and @clfags NULL.
 349  *
 350  * Returns: 0 OK, -error on failure.
 351  **/
 352 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
 353                                  char *strflags, int flags, int key)
 354 {
 355         struct scsi_dev_info_list *devinfo;
 356         struct scsi_dev_info_list_table *devinfo_table =
 357                 scsi_devinfo_lookup_by_key(key);
 358
 359         if (IS_ERR(devinfo_table))
 360                 return PTR_ERR(devinfo_table);
 361
 362         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 363         if (!devinfo) {
 364                 printk(KERN_ERR "%s: no memory\n", __func__);
 365                 return -ENOMEM;
 366         }
 367
 368         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 369                             vendor, compatible);
 370         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 371                             model, compatible);
 372
 373         if (strflags)
 374                 devinfo->flags = simple_strtoul(strflags, NULL, 0);
 375         else
 376                 devinfo->flags = flags;
 377
 378         devinfo->compatible = compatible;
 379
 380         if (compatible)
 381                 list_add_tail(&devinfo->dev_info_list,
 382                               &devinfo_table->scsi_dev_info_list);
 383         else
 384                 list_add(&devinfo->dev_info_list,
 385                          &devinfo_table->scsi_dev_info_list);
 386
 387         return 0;
 388 }
 389 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
 390
 391 /**
 392  * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
 393  * @vendor:     vendor string
 394  * @model:      model (product) string
 395  * @key:        specify list to use
 396  *
 397  * Description:
 398  *      Remove and destroy one dev_info entry for @vendor, @model
 399  *      in list specified by @key.
 400  *
 401  * Returns: 0 OK, -error on failure.
 402  **/
 403 int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key)
 404 {
 405         struct scsi_dev_info_list *devinfo, *found = NULL;
 406         struct scsi_dev_info_list_table *devinfo_table =
 407                 scsi_devinfo_lookup_by_key(key);
 408
 409         if (IS_ERR(devinfo_table))
 410                 return PTR_ERR(devinfo_table);
 411
 412         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 413                             dev_info_list) {
 414                 if (devinfo->compatible) {
 415                         /*
 416                          * Behave like the older version of get_device_flags.
 417                          */
 418                         size_t max;
 419                         /*
 420                          * XXX why skip leading spaces? If an odd INQUIRY
 421                          * value, that should have been part of the
 422                          * scsi_static_device_list[] entry, such as "  FOO"
 423                          * rather than "FOO". Since this code is already
 424                          * here, and we don't know what device it is
 425                          * trying to work with, leave it as-is.
 426                          */
 427                         max = 8;        /* max length of vendor */
 428                         while ((max > 0) && *vendor == ' ') {
 429                                 max--;
 430                                 vendor++;
 431                         }
 432                         /*
 433                          * XXX removing the following strlen() would be
 434                          * good, using it means that for a an entry not in
 435                          * the list, we scan every byte of every vendor
 436                          * listed in scsi_static_device_list[], and never match
 437                          * a single one (and still have to compare at
 438                          * least the first byte of each vendor).
 439                          */
 440                         if (memcmp(devinfo->vendor, vendor,
 441                                     min(max, strlen(devinfo->vendor))))
 442                                 continue;
 443                         /*
 444                          * Skip spaces again.
 445                          */
 446                         max = 16;       /* max length of model */
 447                         while ((max > 0) && *model == ' ') {
 448                                 max--;
 449                                 model++;
 450                         }
 451                         if (memcmp(devinfo->model, model,
 452                                    min(max, strlen(devinfo->model))))
 453                                 continue;
 454                         found = devinfo;
 455                 } else {
 456                         if (!memcmp(devinfo->vendor, vendor,
 457                                      sizeof(devinfo->vendor)) &&
 458                              !memcmp(devinfo->model, model,
 459                                       sizeof(devinfo->model)))
 460                                 found = devinfo;
 461                 }
 462                 if (found)
 463                         break;
 464         }
 465
 466         if (found) {
 467                 list_del(&found->dev_info_list);
 468                 kfree(found);
 469                 return 0;
 470         }
 471
 472         return -ENOENT;
 473 }
 474 EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
 475
 476 /**
 477  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 478  * @dev_list:   string of device flags to add
 479  *
 480  * Description:
 481  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 482  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 483  *      dev_list is modified via strsep. Can be called for command line
 484  *      addition, for proc or mabye a sysfs interface.
 485  *
 486  * Returns: 0 if OK, -error on failure.
 487  **/
 488 static int scsi_dev_info_list_add_str(char *dev_list)
 489 {
 490         char *vendor, *model, *strflags, *next;
 491         char *next_check;
 492         int res = 0;
 493
 494         next = dev_list;
 495         if (next && next[0] == '"') {
 496                 /*
 497                  * Ignore both the leading and trailing quote.
 498                  */
 499                 next++;
 500                 next_check = ",\"";
 501         } else {
 502                 next_check = ",";
 503         }
 504
 505         /*
 506          * For the leading and trailing '"' case, the for loop comes
 507          * through the last time with vendor[0] == '\0'.
 508          */
 509         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 510              && (res == 0); vendor = strsep(&next, ":")) {
 511                 strflags = NULL;
 512                 model = strsep(&next, ":");
 513                 if (model)
 514                         strflags = strsep(&next, next_check);
 515                 if (!model || !strflags) {
 516                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 517                                " '%s'\n", __func__, vendor, model,
 518                                strflags);
 519                         res = -EINVAL;
 520                 } else
 521                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 522                                                      model, strflags, 0);
 523         }
 524         return res;
 525 }
 526
 527 /**
 528  * get_device_flags - get device specific flags from the dynamic device list.
 529  * @sdev:       &scsi_device to get flags for
 530  * @vendor:     vendor name
 531  * @model:      model name
 532  *
 533  * Description:
 534  *     Search the global scsi_dev_info_list (specified by list zero)
 535  *     for an entry matching @vendor and @model, if found, return the
 536  *     matching flags value, else return the host or global default
 537  *     settings.  Called during scan time.
 538  **/
 539 int scsi_get_device_flags(struct scsi_device *sdev,
 540                           const unsigned char *vendor,
 541                           const unsigned char *model)
 542 {
 543         return scsi_get_device_flags_keyed(sdev, vendor, model,
 544                                            SCSI_DEVINFO_GLOBAL);
 545 }
 546
 547
 548 /**
 549  * scsi_get_device_flags_keyed - 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  * @key:        list to look up
 554  *
 555  * Description:
 556  *     Search the scsi_dev_info_list specified by @key for an entry
 557  *     matching @vendor and @model, if found, return the matching
 558  *     flags value, else return the host or global default settings.
 559  *     Called during scan time.
 560  **/
 561 int scsi_get_device_flags_keyed(struct scsi_device *sdev,
 562                                 const unsigned char *vendor,
 563                                 const unsigned char *model,
 564                                 int key)
 565 {
 566         struct scsi_dev_info_list *devinfo;
 567         struct scsi_dev_info_list_table *devinfo_table;
 568
 569         devinfo_table = scsi_devinfo_lookup_by_key(key);
 570
 571         if (IS_ERR(devinfo_table))
 572                 return PTR_ERR(devinfo_table);
 573
 574         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 575                             dev_info_list) {
 576                 if (devinfo->compatible) {
 577                         /*
 578                          * Behave like the older version of get_device_flags.
 579                          */
 580                         size_t max;
 581                         /*
 582                          * XXX why skip leading spaces? If an odd INQUIRY
 583                          * value, that should have been part of the
 584                          * scsi_static_device_list[] entry, such as "  FOO"
 585                          * rather than "FOO". Since this code is already
 586                          * here, and we don't know what device it is
 587                          * trying to work with, leave it as-is.
 588                          */
 589                         max = 8;        /* max length of vendor */
 590                         while ((max > 0) && *vendor == ' ') {
 591                                 max--;
 592                                 vendor++;
 593                         }
 594                         /*
 595                          * XXX removing the following strlen() would be
 596                          * good, using it means that for a an entry not in
 597                          * the list, we scan every byte of every vendor
 598                          * listed in scsi_static_device_list[], and never match
 599                          * a single one (and still have to compare at
 600                          * least the first byte of each vendor).
 601                          */
 602                         if (memcmp(devinfo->vendor, vendor,
 603                                     min(max, strlen(devinfo->vendor))))
 604                                 continue;
 605                         /*
 606                          * Skip spaces again.
 607                          */
 608                         max = 16;       /* max length of model */
 609                         while ((max > 0) && *model == ' ') {
 610                                 max--;
 611                                 model++;
 612                         }
 613                         if (memcmp(devinfo->model, model,
 614                                    min(max, strlen(devinfo->model))))
 615                                 continue;
 616                         return devinfo->flags;
 617                 } else {
 618                         if (!memcmp(devinfo->vendor, vendor,
 619                                      sizeof(devinfo->vendor)) &&
 620                              !memcmp(devinfo->model, model,
 621                                       sizeof(devinfo->model)))
 622                                 return devinfo->flags;
 623                 }
 624         }
 625         /* nothing found, return nothing */
 626         if (key != SCSI_DEVINFO_GLOBAL)
 627                 return 0;
 628
 629         /* except for the global list, where we have an exception */
 630         if (sdev->sdev_bflags)
 631                 return sdev->sdev_bflags;
 632
 633         return scsi_default_dev_flags;
 634 }
 635 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
 636
 637 #ifdef CONFIG_SCSI_PROC_FS
 638 struct double_list {
 639         struct list_head *top;
 640         struct list_head *bottom;
 641 };
 642
 643 static int devinfo_seq_show(struct seq_file *m, void *v)
 644 {
 645         struct double_list *dl = v;
 646         struct scsi_dev_info_list_table *devinfo_table =
 647                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 648         struct scsi_dev_info_list *devinfo =
 649                 list_entry(dl->bottom, struct scsi_dev_info_list,
 650                            dev_info_list);
 651
 652         if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
 653             devinfo_table->name)
 654                 seq_printf(m, "[%s]:\n", devinfo_table->name);
 655
 656         seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
 657                    devinfo->vendor, devinfo->model, devinfo->flags);
 658         return 0;
 659 }
 660
 661 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
 662 {
 663         struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
 664         loff_t pos = *ppos;
 665
 666         if (!dl)
 667                 return NULL;
 668
 669         list_for_each(dl->top, &scsi_dev_info_list) {
 670                 struct scsi_dev_info_list_table *devinfo_table =
 671                         list_entry(dl->top, struct scsi_dev_info_list_table,
 672                                    node);
 673                 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
 674                         if (pos-- == 0)
 675                                 return dl;
 676         }
 677
 678         kfree(dl);
 679         return NULL;
 680 }
 681
 682 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
 683 {
 684         struct double_list *dl = v;
 685         struct scsi_dev_info_list_table *devinfo_table =
 686                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 687
 688         ++*ppos;
 689         dl->bottom = dl->bottom->next;
 690         while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
 691                 dl->top = dl->top->next;
 692                 if (dl->top == &scsi_dev_info_list) {
 693                         kfree(dl);
 694                         return NULL;
 695                 }
 696                 devinfo_table = list_entry(dl->top,
 697                                            struct scsi_dev_info_list_table,
 698                                            node);
 699                 dl->bottom = devinfo_table->scsi_dev_info_list.next;
 700         }
 701
 702         return dl;
 703 }
 704
 705 static void devinfo_seq_stop(struct seq_file *m, void *v)
 706 {
 707         kfree(v);
 708 }
 709
 710 static const struct seq_operations scsi_devinfo_seq_ops = {
 711         .start  = devinfo_seq_start,
 712         .next   = devinfo_seq_next,
 713         .stop   = devinfo_seq_stop,
 714         .show   = devinfo_seq_show,
 715 };
 716
 717 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 718 {
 719         return seq_open(file, &scsi_devinfo_seq_ops);
 720 }
 721
 722 /*
 723  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 724  *
 725  * Description: Adds a black/white list entry for vendor and model with an
 726  * integer value of flag to the scsi device info list.
 727  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 728  */
 729 static ssize_t proc_scsi_devinfo_write(struct file *file,
 730                                        const char __user *buf,
 731                                        size_t length, loff_t *ppos)
 732 {
 733         char *buffer;
 734         ssize_t err = length;
 735
 736         if (!buf || length>PAGE_SIZE)
 737                 return -EINVAL;
 738         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 739                 return -ENOMEM;
 740         if (copy_from_user(buffer, buf, length)) {
 741                 err =-EFAULT;
 742                 goto out;
 743         }
 744
 745         if (length < PAGE_SIZE)
 746                 buffer[length] = '\0';
 747         else if (buffer[PAGE_SIZE-1]) {
 748                 err = -EINVAL;
 749                 goto out;
 750         }
 751
 752         scsi_dev_info_list_add_str(buffer);
 753
 754 out:
 755         free_page((unsigned long)buffer);
 756         return err;
 757 }
 758
 759 static const struct file_operations scsi_devinfo_proc_fops = {
 760         .owner          = THIS_MODULE,
 761         .open           = proc_scsi_devinfo_open,
 762         .read           = seq_read,
 763         .write          = proc_scsi_devinfo_write,
 764         .llseek         = seq_lseek,
 765         .release        = seq_release,
 766 };
 767 #endif /* CONFIG_SCSI_PROC_FS */
 768
 769 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 770 MODULE_PARM_DESC(dev_flags,
 771          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 772          " list entries for vendor and model with an integer value of flags"
 773          " to the scsi device info list");
 774
 775 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 776 MODULE_PARM_DESC(default_dev_flags,
 777                  "scsi default device flag integer value");
 778
 779 /**
 780  * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 781  **/
 782 void scsi_exit_devinfo(void)
 783 {
 784 #ifdef CONFIG_SCSI_PROC_FS
 785         remove_proc_entry("scsi/device_info", NULL);
 786 #endif
 787
 788         scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 789 }
 790
 791 /**
 792  * scsi_dev_info_add_list - add a new devinfo list
 793  * @key:        key of the list to add
 794  * @name:       Name of the list to add (for /proc/scsi/device_info)
 795  *
 796  * Adds the requested list, returns zero on success, -EEXIST if the
 797  * key is already registered to a list, or other error on failure.
 798  */
 799 int scsi_dev_info_add_list(int key, const char *name)
 800 {
 801         struct scsi_dev_info_list_table *devinfo_table =
 802                 scsi_devinfo_lookup_by_key(key);
 803
 804         if (!IS_ERR(devinfo_table))
 805                 /* list already exists */
 806                 return -EEXIST;
 807
 808         devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 809
 810         if (!devinfo_table)
 811                 return -ENOMEM;
 812
 813         INIT_LIST_HEAD(&devinfo_table->node);
 814         INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 815         devinfo_table->name = name;
 816         devinfo_table->key = key;
 817         list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 818
 819         return 0;
 820 }
 821 EXPORT_SYMBOL(scsi_dev_info_add_list);
 822
 823 /**
 824  * scsi_dev_info_remove_list - destroy an added devinfo list
 825  * @key: key of the list to destroy
 826  *
 827  * Iterates over the entire list first, freeing all the values, then
 828  * frees the list itself.  Returns 0 on success or -EINVAL if the key
 829  * can't be found.
 830  */
 831 int scsi_dev_info_remove_list(int key)
 832 {
 833         struct list_head *lh, *lh_next;
 834         struct scsi_dev_info_list_table *devinfo_table =
 835                 scsi_devinfo_lookup_by_key(key);
 836
 837         if (IS_ERR(devinfo_table))
 838                 /* no such list */
 839                 return -EINVAL;
 840
 841         /* remove from the master list */
 842         list_del(&devinfo_table->node);
 843
 844         list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 845                 struct scsi_dev_info_list *devinfo;
 846
 847                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 848                                      dev_info_list);
 849                 kfree(devinfo);
 850         }
 851         kfree(devinfo_table);
 852
 853         return 0;
 854 }
 855 EXPORT_SYMBOL(scsi_dev_info_remove_list);
 856
 857 /**
 858  * scsi_init_devinfo - set up the dynamic device list.
 859  *
 860  * Description:
 861  *      Add command line entries from scsi_dev_flags, then add
 862  *      scsi_static_device_list entries to the scsi device info list.
 863  */
 864 int __init scsi_init_devinfo(void)
 865 {
 866 #ifdef CONFIG_SCSI_PROC_FS
 867         struct proc_dir_entry *p;
 868 #endif
 869         int error, i;
 870
 871         error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 872         if (error)
 873                 return error;
 874
 875         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 876         if (error)
 877                 goto out;
 878
 879         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 880                 error = scsi_dev_info_list_add(1 /* compatibile */,
 881                                 scsi_static_device_list[i].vendor,
 882                                 scsi_static_device_list[i].model,
 883                                 NULL,
 884                                 scsi_static_device_list[i].flags);
 885                 if (error)
 886                         goto out;
 887         }
 888
 889 #ifdef CONFIG_SCSI_PROC_FS
 890         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
 891         if (!p) {
 892                 error = -ENOMEM;
 893                 goto out;
 894         }
 895 #endif /* CONFIG_SCSI_PROC_FS */
 896
 897  out:
 898         if (error)
 899                 scsi_exit_devinfo();
 900         return error;
 901 }