drivers/scsi/scsi_devinfo.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 #include <linux/blkdev.h>
   4 #include <linux/init.h>
   5 #include <linux/kernel.h>
   6 #include <linux/module.h>
   7 #include <linux/moduleparam.h>
   8 #include <linux/proc_fs.h>
   9 #include <linux/seq_file.h>
  10 #include <linux/slab.h>
  11
  12 #include <scsi/scsi_device.h>
  13 #include <scsi/scsi_devinfo.h>
  14
  15 #include "scsi_priv.h"
  16
  17
  18 /*
  19  * scsi_dev_info_list: structure to hold black/white listed devices.
  20  */
  21 struct scsi_dev_info_list {
  22         struct list_head dev_info_list;
  23         char vendor[8];
  24         char model[16];
  25         blist_flags_t flags;
  26         unsigned compatible; /* for use with scsi_static_device_list entries */
  27 };
  28
  29 struct scsi_dev_info_list_table {
  30         struct list_head node;  /* our node for being on the master list */
  31         struct list_head scsi_dev_info_list; /* head of dev info list */
  32         const char *name;       /* name of list for /proc (NULL for global) */
  33         int key;                /* unique numeric identifier */
  34 };
  35
  36
  37 static blist_flags_t 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         blist_flags_t 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", NULL, BLIST_NOLUN},            /* scanjet iip */
 112         {"HP", "C2500A", NULL, 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 | BLIST_BORKEN},
 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         {"AIX", "VDASD", NULL, BLIST_TRY_VPD_PAGES},
 138         {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
 139         {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_FORCELUN | BLIST_INQUIRY_36},
 140         {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
 141         {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
 142         {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
 143         {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
 144         {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
 145         {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
 146         {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
 147         {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
 148                 BLIST_MAX_512 | BLIST_REPORTLUN2},      /* Compaq RA4x00 */
 149         {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
 150         {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
 151         {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 152         {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 153         {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 154         {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
 155         {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 156         {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
 157         {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
 158         {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
 159         {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
 160         {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
 161         {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* EMC CLARiiON, storage on LUN 0 */
 162         {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* EMC CLARiiON, no storage on LUN 0 */
 163         {"EMC",  "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 164         {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_REPORTLUN2},
 165         {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
 166         {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
 167         {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
 168         {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
 169         {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 170         {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
 171         {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
 172         {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
 173         {"HITACHI", "DF400", "*", BLIST_REPORTLUN2},
 174         {"HITACHI", "DF500", "*", BLIST_REPORTLUN2},
 175         {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
 176         {"HITACHI", "HUS1530", "*", BLIST_NO_DIF},
 177         {"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES},
 178         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 179         {"HP", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES}, /* HP XP Arrays */
 180         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 181         {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 182         {"HP", "C1557A", NULL, BLIST_FORCELUN},
 183         {"HP", "C3323-300", "4269", BLIST_NOTQ},
 184         {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
 185         {"HP", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
 186         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 187         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 188         {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
 189         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 190         {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
 191         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 192         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 193         {"INSITE", "I325VM", NULL, BLIST_KEY},
 194         {"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
 195         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 196         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 197         {"Marvell", "Console", NULL, BLIST_SKIP_VPD_PAGES},
 198         {"Marvell", "91xx Config", "1.01", BLIST_SKIP_VPD_PAGES},
 199         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 200         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 201         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 202         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 203         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 204         {"MICROP", "4110", NULL, BLIST_NOTQ},
 205         {"MSFT", "Virtual HD", NULL, BLIST_MAX_1024 | BLIST_NO_RSOC},
 206         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 207         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 208         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 209         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 210         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 211         {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 212         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 213         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 214         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 215         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 216         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 217         {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 218         {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
 219         {"Promise", "", NULL, BLIST_SPARSELUN},
 220         {"QEMU", "QEMU CD-ROM", NULL, BLIST_SKIP_VPD_PAGES},
 221         {"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
 222         {"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
 223         {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 224         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 225         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 226         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 227         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 228         {"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
 229         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 230         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 231         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 232         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 233         {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 234         {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 235         {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 236         {"STK", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 237         {"NETAPP", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 238         {"LSI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 239         {"ENGENIO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 240         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 241         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 242         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 243         {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 244         {"SUN", "T300", "*", BLIST_SPARSELUN},
 245         {"SUN", "T4", "*", BLIST_SPARSELUN},
 246         {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 247         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 248         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 249         {"Traxdata", "CDR4120", NULL, BLIST_NOLUN},     /* locks up */
 250         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 251         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 252         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 253         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 254         {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 255         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 256         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 257         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 258         { NULL, NULL, NULL, 0 },
 259 };
 260
 261 static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
 262 {
 263         struct scsi_dev_info_list_table *devinfo_table;
 264         int found = 0;
 265
 266         list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
 267                 if (devinfo_table->key == key) {
 268                         found = 1;
 269                         break;
 270                 }
 271         if (!found)
 272                 return ERR_PTR(-EINVAL);
 273
 274         return devinfo_table;
 275 }
 276
 277 /*
 278  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 279  * devinfo vendor and model strings.
 280  */
 281 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 282                                 char *from, int compatible)
 283 {
 284         size_t from_length;
 285
 286         from_length = strlen(from);
 287         /* This zero-pads the destination */
 288         strncpy(to, from, to_length);
 289         if (from_length < to_length && !compatible) {
 290                 /*
 291                  * space pad the string if it is short.
 292                  */
 293                 memset(&to[from_length], ' ', to_length - from_length);
 294         }
 295         if (from_length > to_length)
 296                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 297                         __func__, name, from);
 298 }
 299
 300 /**
 301  * scsi_dev_info_list_add - add one dev_info list entry.
 302  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 303  * @vendor:     vendor string
 304  * @model:      model (product) string
 305  * @strflags:   integer string
 306  * @flags:      if strflags NULL, use this flag value
 307  *
 308  * Description:
 309  *      Create and add one dev_info entry for @vendor, @model, @strflags or
 310  *      @flag. If @compatible, add to the tail of the list, do not space
 311  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 312  *      are added with @compatible 1 and @clfags NULL.
 313  *
 314  * Returns: 0 OK, -error on failure.
 315  **/
 316 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 317                             char *strflags, blist_flags_t flags)
 318 {
 319         return scsi_dev_info_list_add_keyed(compatible, vendor, model,
 320                                             strflags, flags,
 321                                             SCSI_DEVINFO_GLOBAL);
 322 }
 323
 324 /**
 325  * scsi_dev_info_list_add_keyed - add one dev_info list entry.
 326  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 327  * @vendor:     vendor string
 328  * @model:      model (product) string
 329  * @strflags:   integer string
 330  * @flags:      if strflags NULL, use this flag value
 331  * @key:        specify list to use
 332  *
 333  * Description:
 334  *      Create and add one dev_info entry for @vendor, @model,
 335  *      @strflags or @flag in list specified by @key. If @compatible,
 336  *      add to the tail of the list, do not space pad, and set
 337  *      devinfo->compatible. The scsi_static_device_list entries are
 338  *      added with @compatible 1 and @clfags NULL.
 339  *
 340  * Returns: 0 OK, -error on failure.
 341  **/
 342 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
 343                                  char *strflags, blist_flags_t flags,
 344                                  enum scsi_devinfo_key key)
 345 {
 346         struct scsi_dev_info_list *devinfo;
 347         struct scsi_dev_info_list_table *devinfo_table =
 348                 scsi_devinfo_lookup_by_key(key);
 349
 350         if (IS_ERR(devinfo_table))
 351                 return PTR_ERR(devinfo_table);
 352
 353         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 354         if (!devinfo) {
 355                 printk(KERN_ERR "%s: no memory\n", __func__);
 356                 return -ENOMEM;
 357         }
 358
 359         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 360                             vendor, compatible);
 361         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 362                             model, compatible);
 363
 364         if (strflags)
 365                 flags = (__force blist_flags_t)simple_strtoul(strflags, NULL, 0);
 366         devinfo->flags = flags;
 367         devinfo->compatible = compatible;
 368
 369         if (compatible)
 370                 list_add_tail(&devinfo->dev_info_list,
 371                               &devinfo_table->scsi_dev_info_list);
 372         else
 373                 list_add(&devinfo->dev_info_list,
 374                          &devinfo_table->scsi_dev_info_list);
 375
 376         return 0;
 377 }
 378 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
 379
 380 /**
 381  * scsi_dev_info_list_find - find a matching dev_info list entry.
 382  * @vendor:     full vendor string
 383  * @model:      full model (product) string
 384  * @key:        specify list to use
 385  *
 386  * Description:
 387  *      Finds the first dev_info entry matching @vendor, @model
 388  *      in list specified by @key.
 389  *
 390  * Returns: pointer to matching entry, or ERR_PTR on failure.
 391  **/
 392 static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
 393                 const char *model, enum scsi_devinfo_key key)
 394 {
 395         struct scsi_dev_info_list *devinfo;
 396         struct scsi_dev_info_list_table *devinfo_table =
 397                 scsi_devinfo_lookup_by_key(key);
 398         size_t vmax, mmax, mlen;
 399         const char *vskip, *mskip;
 400
 401         if (IS_ERR(devinfo_table))
 402                 return (struct scsi_dev_info_list *) devinfo_table;
 403
 404         /* Prepare for "compatible" matches */
 405
 406         /*
 407          * XXX why skip leading spaces? If an odd INQUIRY
 408          * value, that should have been part of the
 409          * scsi_static_device_list[] entry, such as "  FOO"
 410          * rather than "FOO". Since this code is already
 411          * here, and we don't know what device it is
 412          * trying to work with, leave it as-is.
 413          */
 414         vmax = sizeof(devinfo->vendor);
 415         vskip = vendor;
 416         while (vmax > 0 && *vskip == ' ') {
 417                 vmax--;
 418                 vskip++;
 419         }
 420         /* Also skip trailing spaces */
 421         while (vmax > 0 && vskip[vmax - 1] == ' ')
 422                 --vmax;
 423
 424         mmax = sizeof(devinfo->model);
 425         mskip = model;
 426         while (mmax > 0 && *mskip == ' ') {
 427                 mmax--;
 428                 mskip++;
 429         }
 430         while (mmax > 0 && mskip[mmax - 1] == ' ')
 431                 --mmax;
 432
 433         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 434                             dev_info_list) {
 435                 if (devinfo->compatible) {
 436                         /*
 437                          * vendor strings must be an exact match
 438                          */
 439                         if (vmax != strnlen(devinfo->vendor,
 440                                             sizeof(devinfo->vendor)) ||
 441                             memcmp(devinfo->vendor, vskip, vmax))
 442                                 continue;
 443
 444                         /*
 445                          * @model specifies the full string, and
 446                          * must be larger or equal to devinfo->model
 447                          */
 448                         mlen = strnlen(devinfo->model, sizeof(devinfo->model));
 449                         if (mmax < mlen || memcmp(devinfo->model, mskip, mlen))
 450                                 continue;
 451                         return devinfo;
 452                 } else {
 453                         if (!memcmp(devinfo->vendor, vendor,
 454                                     sizeof(devinfo->vendor)) &&
 455                             !memcmp(devinfo->model, model,
 456                                     sizeof(devinfo->model)))
 457                                 return devinfo;
 458                 }
 459         }
 460
 461         return ERR_PTR(-ENOENT);
 462 }
 463
 464 /**
 465  * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
 466  * @vendor:     vendor string
 467  * @model:      model (product) string
 468  * @key:        specify list to use
 469  *
 470  * Description:
 471  *      Remove and destroy one dev_info entry for @vendor, @model
 472  *      in list specified by @key.
 473  *
 474  * Returns: 0 OK, -error on failure.
 475  **/
 476 int scsi_dev_info_list_del_keyed(char *vendor, char *model,
 477                                  enum scsi_devinfo_key key)
 478 {
 479         struct scsi_dev_info_list *found;
 480
 481         found = scsi_dev_info_list_find(vendor, model, key);
 482         if (IS_ERR(found))
 483                 return PTR_ERR(found);
 484
 485         list_del(&found->dev_info_list);
 486         kfree(found);
 487         return 0;
 488 }
 489 EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
 490
 491 /**
 492  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 493  * @dev_list:   string of device flags to add
 494  *
 495  * Description:
 496  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 497  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 498  *      dev_list is modified via strsep. Can be called for command line
 499  *      addition, for proc or mabye a sysfs interface.
 500  *
 501  * Returns: 0 if OK, -error on failure.
 502  **/
 503 static int scsi_dev_info_list_add_str(char *dev_list)
 504 {
 505         char *vendor, *model, *strflags, *next;
 506         char *next_check;
 507         int res = 0;
 508
 509         next = dev_list;
 510         if (next && next[0] == '"') {
 511                 /*
 512                  * Ignore both the leading and trailing quote.
 513                  */
 514                 next++;
 515                 next_check = ",\"";
 516         } else {
 517                 next_check = ",";
 518         }
 519
 520         /*
 521          * For the leading and trailing '"' case, the for loop comes
 522          * through the last time with vendor[0] == '\0'.
 523          */
 524         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 525              && (res == 0); vendor = strsep(&next, ":")) {
 526                 strflags = NULL;
 527                 model = strsep(&next, ":");
 528                 if (model)
 529                         strflags = strsep(&next, next_check);
 530                 if (!model || !strflags) {
 531                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 532                                " '%s'\n", __func__, vendor, model,
 533                                strflags);
 534                         res = -EINVAL;
 535                 } else
 536                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 537                                                      model, strflags, 0);
 538         }
 539         return res;
 540 }
 541
 542 /**
 543  * get_device_flags - get device specific flags from the dynamic device list.
 544  * @sdev:       &scsi_device to get flags for
 545  * @vendor:     vendor name
 546  * @model:      model name
 547  *
 548  * Description:
 549  *     Search the global scsi_dev_info_list (specified by list zero)
 550  *     for an entry matching @vendor and @model, if found, return the
 551  *     matching flags value, else return the host or global default
 552  *     settings.  Called during scan time.
 553  **/
 554 blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
 555                                     const unsigned char *vendor,
 556                                     const unsigned char *model)
 557 {
 558         return scsi_get_device_flags_keyed(sdev, vendor, model,
 559                                            SCSI_DEVINFO_GLOBAL);
 560 }
 561
 562
 563 /**
 564  * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
 565  * @sdev:       &scsi_device to get flags for
 566  * @vendor:     vendor name
 567  * @model:      model name
 568  * @key:        list to look up
 569  *
 570  * Description:
 571  *     Search the scsi_dev_info_list specified by @key for an entry
 572  *     matching @vendor and @model, if found, return the matching
 573  *     flags value, else return the host or global default settings.
 574  *     Called during scan time.
 575  **/
 576 blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
 577                                 const unsigned char *vendor,
 578                                 const unsigned char *model,
 579                                 enum scsi_devinfo_key key)
 580 {
 581         struct scsi_dev_info_list *devinfo;
 582
 583         devinfo = scsi_dev_info_list_find(vendor, model, key);
 584         if (!IS_ERR(devinfo))
 585                 return devinfo->flags;
 586
 587         /* key or device not found: return nothing */
 588         if (key != SCSI_DEVINFO_GLOBAL)
 589                 return 0;
 590
 591         /* except for the global list, where we have an exception */
 592         if (sdev->sdev_bflags)
 593                 return sdev->sdev_bflags;
 594
 595         return scsi_default_dev_flags;
 596 }
 597 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
 598
 599 #ifdef CONFIG_SCSI_PROC_FS
 600 struct double_list {
 601         struct list_head *top;
 602         struct list_head *bottom;
 603 };
 604
 605 static int devinfo_seq_show(struct seq_file *m, void *v)
 606 {
 607         struct double_list *dl = v;
 608         struct scsi_dev_info_list_table *devinfo_table =
 609                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 610         struct scsi_dev_info_list *devinfo =
 611                 list_entry(dl->bottom, struct scsi_dev_info_list,
 612                            dev_info_list);
 613
 614         if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
 615             devinfo_table->name)
 616                 seq_printf(m, "[%s]:\n", devinfo_table->name);
 617
 618         seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
 619                    devinfo->vendor, devinfo->model, devinfo->flags);
 620         return 0;
 621 }
 622
 623 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
 624 {
 625         struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
 626         loff_t pos = *ppos;
 627
 628         if (!dl)
 629                 return NULL;
 630
 631         list_for_each(dl->top, &scsi_dev_info_list) {
 632                 struct scsi_dev_info_list_table *devinfo_table =
 633                         list_entry(dl->top, struct scsi_dev_info_list_table,
 634                                    node);
 635                 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
 636                         if (pos-- == 0)
 637                                 return dl;
 638         }
 639
 640         kfree(dl);
 641         return NULL;
 642 }
 643
 644 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
 645 {
 646         struct double_list *dl = v;
 647         struct scsi_dev_info_list_table *devinfo_table =
 648                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 649
 650         ++*ppos;
 651         dl->bottom = dl->bottom->next;
 652         while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
 653                 dl->top = dl->top->next;
 654                 if (dl->top == &scsi_dev_info_list) {
 655                         kfree(dl);
 656                         return NULL;
 657                 }
 658                 devinfo_table = list_entry(dl->top,
 659                                            struct scsi_dev_info_list_table,
 660                                            node);
 661                 dl->bottom = devinfo_table->scsi_dev_info_list.next;
 662         }
 663
 664         return dl;
 665 }
 666
 667 static void devinfo_seq_stop(struct seq_file *m, void *v)
 668 {
 669         kfree(v);
 670 }
 671
 672 static const struct seq_operations scsi_devinfo_seq_ops = {
 673         .start  = devinfo_seq_start,
 674         .next   = devinfo_seq_next,
 675         .stop   = devinfo_seq_stop,
 676         .show   = devinfo_seq_show,
 677 };
 678
 679 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 680 {
 681         return seq_open(file, &scsi_devinfo_seq_ops);
 682 }
 683
 684 /*
 685  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 686  *
 687  * Description: Adds a black/white list entry for vendor and model with an
 688  * integer value of flag to the scsi device info list.
 689  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 690  */
 691 static ssize_t proc_scsi_devinfo_write(struct file *file,
 692                                        const char __user *buf,
 693                                        size_t length, loff_t *ppos)
 694 {
 695         char *buffer;
 696         ssize_t err = length;
 697
 698         if (!buf || length>PAGE_SIZE)
 699                 return -EINVAL;
 700         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 701                 return -ENOMEM;
 702         if (copy_from_user(buffer, buf, length)) {
 703                 err =-EFAULT;
 704                 goto out;
 705         }
 706
 707         if (length < PAGE_SIZE)
 708                 buffer[length] = '\0';
 709         else if (buffer[PAGE_SIZE-1]) {
 710                 err = -EINVAL;
 711                 goto out;
 712         }
 713
 714         scsi_dev_info_list_add_str(buffer);
 715
 716 out:
 717         free_page((unsigned long)buffer);
 718         return err;
 719 }
 720
 721 static const struct file_operations scsi_devinfo_proc_fops = {
 722         .owner          = THIS_MODULE,
 723         .open           = proc_scsi_devinfo_open,
 724         .read           = seq_read,
 725         .write          = proc_scsi_devinfo_write,
 726         .llseek         = seq_lseek,
 727         .release        = seq_release,
 728 };
 729 #endif /* CONFIG_SCSI_PROC_FS */
 730
 731 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 732 MODULE_PARM_DESC(dev_flags,
 733          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 734          " list entries for vendor and model with an integer value of flags"
 735          " to the scsi device info list");
 736
 737 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 738 MODULE_PARM_DESC(default_dev_flags,
 739                  "scsi default device flag integer value");
 740
 741 /**
 742  * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 743  **/
 744 void scsi_exit_devinfo(void)
 745 {
 746 #ifdef CONFIG_SCSI_PROC_FS
 747         remove_proc_entry("scsi/device_info", NULL);
 748 #endif
 749
 750         scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 751 }
 752
 753 /**
 754  * scsi_dev_info_add_list - add a new devinfo list
 755  * @key:        key of the list to add
 756  * @name:       Name of the list to add (for /proc/scsi/device_info)
 757  *
 758  * Adds the requested list, returns zero on success, -EEXIST if the
 759  * key is already registered to a list, or other error on failure.
 760  */
 761 int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name)
 762 {
 763         struct scsi_dev_info_list_table *devinfo_table =
 764                 scsi_devinfo_lookup_by_key(key);
 765
 766         if (!IS_ERR(devinfo_table))
 767                 /* list already exists */
 768                 return -EEXIST;
 769
 770         devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 771
 772         if (!devinfo_table)
 773                 return -ENOMEM;
 774
 775         INIT_LIST_HEAD(&devinfo_table->node);
 776         INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 777         devinfo_table->name = name;
 778         devinfo_table->key = key;
 779         list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 780
 781         return 0;
 782 }
 783 EXPORT_SYMBOL(scsi_dev_info_add_list);
 784
 785 /**
 786  * scsi_dev_info_remove_list - destroy an added devinfo list
 787  * @key: key of the list to destroy
 788  *
 789  * Iterates over the entire list first, freeing all the values, then
 790  * frees the list itself.  Returns 0 on success or -EINVAL if the key
 791  * can't be found.
 792  */
 793 int scsi_dev_info_remove_list(enum scsi_devinfo_key key)
 794 {
 795         struct list_head *lh, *lh_next;
 796         struct scsi_dev_info_list_table *devinfo_table =
 797                 scsi_devinfo_lookup_by_key(key);
 798
 799         if (IS_ERR(devinfo_table))
 800                 /* no such list */
 801                 return -EINVAL;
 802
 803         /* remove from the master list */
 804         list_del(&devinfo_table->node);
 805
 806         list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 807                 struct scsi_dev_info_list *devinfo;
 808
 809                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 810                                      dev_info_list);
 811                 kfree(devinfo);
 812         }
 813         kfree(devinfo_table);
 814
 815         return 0;
 816 }
 817 EXPORT_SYMBOL(scsi_dev_info_remove_list);
 818
 819 /**
 820  * scsi_init_devinfo - set up the dynamic device list.
 821  *
 822  * Description:
 823  *      Add command line entries from scsi_dev_flags, then add
 824  *      scsi_static_device_list entries to the scsi device info list.
 825  */
 826 int __init scsi_init_devinfo(void)
 827 {
 828 #ifdef CONFIG_SCSI_PROC_FS
 829         struct proc_dir_entry *p;
 830 #endif
 831         int error, i;
 832
 833         error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 834         if (error)
 835                 return error;
 836
 837         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 838         if (error)
 839                 goto out;
 840
 841         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 842                 error = scsi_dev_info_list_add(1 /* compatibile */,
 843                                 scsi_static_device_list[i].vendor,
 844                                 scsi_static_device_list[i].model,
 845                                 NULL,
 846                                 scsi_static_device_list[i].flags);
 847                 if (error)
 848                         goto out;
 849         }
 850
 851 #ifdef CONFIG_SCSI_PROC_FS
 852         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
 853         if (!p) {
 854                 error = -ENOMEM;
 855                 goto out;
 856         }
 857 #endif /* CONFIG_SCSI_PROC_FS */
 858
 859  out:
 860         if (error)
 861                 scsi_exit_devinfo();
 862         return error;
 863 }