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         unsigned 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 const char spaces[] = "                "; /* 16 of them */
  38 static unsigned scsi_default_dev_flags;
  39 static LIST_HEAD(scsi_dev_info_list);
  40 static char scsi_dev_flags[256];
  41
  42 /*
  43  * scsi_static_device_list: deprecated list of devices that require
  44  * settings that differ from the default, includes black-listed (broken)
  45  * devices. The entries here are added to the tail of scsi_dev_info_list
  46  * via scsi_dev_info_list_init.
  47  *
  48  * Do not add to this list, use the command line or proc interface to add
  49  * to the scsi_dev_info_list. This table will eventually go away.
  50  */
  51 static struct {
  52         char *vendor;
  53         char *model;
  54         char *revision; /* revision known to be bad, unused */
  55         unsigned flags;
  56 } scsi_static_device_list[] __initdata = {
  57         /*
  58          * The following devices are known not to tolerate a lun != 0 scan
  59          * for one reason or another. Some will respond to all luns,
  60          * others will lock up.
  61          */
  62         {"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN},     /* locks up */
  63         {"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN},       /* locks up */
  64         {"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN},       /* locks up */
  65         {"DENON", "DRD-25X", "V", BLIST_NOLUN},                 /* locks up */
  66         {"HITACHI", "DK312C", "CM81", BLIST_NOLUN},     /* responds to all lun */
  67         {"HITACHI", "DK314C", "CR21", BLIST_NOLUN},     /* responds to all lun */
  68         {"IBM", "2104-DU3", NULL, BLIST_NOLUN},         /* locks up */
  69         {"IBM", "2104-TU3", NULL, BLIST_NOLUN},         /* locks up */
  70         {"IMS", "CDD521/10", "2.06", BLIST_NOLUN},      /* locks up */
  71         {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN},     /* locks up */
  72         {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN},     /* locks up */
  73         {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN},   /* locks up */
  74         {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN},     /* locks up */
  75         {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN},     /* locks up */
  76         {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN},    /* responds to all lun */
  77         {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN},      /* responds to all lun */
  78         {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
  79         {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN},    /* responds to all lun */
  80         {"RODIME", "RO3000S", "2.33", BLIST_NOLUN},     /* locks up */
  81         {"SUN", "SENA", NULL, BLIST_NOLUN},             /* responds to all luns */
  82         /*
  83          * The following causes a failed REQUEST SENSE on lun 1 for
  84          * aha152x controller, which causes SCSI code to reset bus.
  85          */
  86         {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
  87         /*
  88          * The following causes a failed REQUEST SENSE on lun 1 for
  89          * aha152x controller, which causes SCSI code to reset bus.
  90          */
  91         {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
  92         {"SEAGATE", "ST296", "921", BLIST_NOLUN},       /* responds to all lun */
  93         {"SEAGATE", "ST1581", "6538", BLIST_NOLUN},     /* responds to all lun */
  94         {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
  95         {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
  96         {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
  97         {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
  98         {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
  99         {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN},   /* locks up */
 100         {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN},       /* locks up */
 101         /*
 102          * The following causes a failed REQUEST SENSE on lun 1 for
 103          * seagate controller, which causes SCSI code to reset bus.
 104          */
 105         {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
 106         {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN},        /* responds to all lun */
 107         /*
 108          * The following causes a failed REQUEST SENSE on lun 1 for
 109          * seagate controller, which causes SCSI code to reset bus.
 110          */
 111         {"HP", "C1750A", "3226", BLIST_NOLUN},          /* scanjet iic */
 112         {"HP", "C1790A", "", BLIST_NOLUN},              /* scanjet iip */
 113         {"HP", "C2500A", "", BLIST_NOLUN},              /* scanjet iicx */
 114         {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
 115         {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN},      /* responds to all lun */
 116         {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN},     /* locks up */
 117         {"NEC", "D3856", "0009", BLIST_NOLUN},
 118         {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN},    /* locks up */
 119         {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN},    /* locks up */
 120         {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN},    /* locks up */
 121         {"RELISYS", "Scorpio", NULL, BLIST_NOLUN},      /* responds to all lun */
 122         {"SANKYO", "CP525", "6.64", BLIST_NOLUN},       /* causes failed REQ SENSE, extra reset */
 123         {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
 124         {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
 125         {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN},      /* locks up */
 126         {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN},      /* locks up */
 127         {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN},     /* locks up */
 128         {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN},    /* locks up */
 129         {"", "Scanner", "1.80", BLIST_NOLUN},   /* responds to all lun */
 130
 131         /*
 132          * Other types of devices that have special flags.
 133          * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
 134          */
 135         {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
 136         {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
 137         {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
 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}, /* Dell PV 650F, storage on LUN 0 */
 162         {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, 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},
 178         {"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 179         {"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 180         {"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 181         {"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 182         {"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 183         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 184         {"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
 185         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 186         {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 187         {"HP", "C1557A", NULL, BLIST_FORCELUN},
 188         {"HP", "C3323-300", "4269", BLIST_NOTQ},
 189         {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
 190         {"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 191         {"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 192         {"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 193         {"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 194         {"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 195         {"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 196         {"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 197         {"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 198         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 199         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 200         {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
 201         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 202         {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
 203         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 204         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 205         {"INSITE", "I325VM", NULL, BLIST_KEY},
 206         {"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
 207         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 208         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 209         {"Marvell", "Console", NULL, BLIST_SKIP_VPD_PAGES},
 210         {"Marvell", "91xx Config", "1.01", BLIST_SKIP_VPD_PAGES},
 211         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 212         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 213         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 214         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 215         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 216         {"MICROP", "4110", NULL, BLIST_NOTQ},
 217         {"MSFT", "Virtual HD", NULL, BLIST_NO_RSOC},
 218         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 219         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 220         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 221         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 222         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 223         {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 224         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 225         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 226         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 227         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 228         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 229         {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 230         {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
 231         {"Promise", "", NULL, BLIST_SPARSELUN},
 232         {"QEMU", "QEMU CD-ROM", NULL, BLIST_SKIP_VPD_PAGES},
 233         {"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
 234         {"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
 235         {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 236         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 237         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 238         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 239         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 240         {"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
 241         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 242         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 243         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 244         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 245         {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 246         {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 247         {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 248         {"STK", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 249         {"NETAPP", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 250         {"LSI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 251         {"ENGENIO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 252         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 253         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 254         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 255         {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 256         {"SUN", "T300", "*", BLIST_SPARSELUN},
 257         {"SUN", "T4", "*", BLIST_SPARSELUN},
 258         {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
 259         {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 260         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 261         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 262         {"Traxdata", "CDR4120", NULL, BLIST_NOLUN},     /* locks up */
 263         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 264         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 265         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 266         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 267         {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 268         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 269         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 270         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 271         { NULL, NULL, NULL, 0 },
 272 };
 273
 274 static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
 275 {
 276         struct scsi_dev_info_list_table *devinfo_table;
 277         int found = 0;
 278
 279         list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
 280                 if (devinfo_table->key == key) {
 281                         found = 1;
 282                         break;
 283                 }
 284         if (!found)
 285                 return ERR_PTR(-EINVAL);
 286
 287         return devinfo_table;
 288 }
 289
 290 /*
 291  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 292  * devinfo vendor and model strings.
 293  */
 294 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 295                                 char *from, int compatible)
 296 {
 297         size_t from_length;
 298
 299         from_length = strlen(from);
 300         strncpy(to, from, min(to_length, from_length));
 301         if (from_length < to_length) {
 302                 if (compatible) {
 303                         /*
 304                          * NUL terminate the string if it is short.
 305                          */
 306                         to[from_length] = '\0';
 307                 } else {
 308                         /*
 309                          * space pad the string if it is short.
 310                          */
 311                         strncpy(&to[from_length], spaces,
 312                                 to_length - from_length);
 313                 }
 314         }
 315         if (from_length > to_length)
 316                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 317                         __func__, name, from);
 318 }
 319
 320 /**
 321  * scsi_dev_info_list_add - add one dev_info list entry.
 322  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 323  * @vendor:     vendor string
 324  * @model:      model (product) string
 325  * @strflags:   integer string
 326  * @flags:      if strflags NULL, use this flag value
 327  *
 328  * Description:
 329  *      Create and add one dev_info entry for @vendor, @model, @strflags or
 330  *      @flag. If @compatible, add to the tail of the list, do not space
 331  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 332  *      are added with @compatible 1 and @clfags NULL.
 333  *
 334  * Returns: 0 OK, -error on failure.
 335  **/
 336 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 337                             char *strflags, int flags)
 338 {
 339         return scsi_dev_info_list_add_keyed(compatible, vendor, model,
 340                                             strflags, flags,
 341                                             SCSI_DEVINFO_GLOBAL);
 342 }
 343
 344 /**
 345  * scsi_dev_info_list_add_keyed - add one dev_info list entry.
 346  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 347  * @vendor:     vendor string
 348  * @model:      model (product) string
 349  * @strflags:   integer string
 350  * @flags:      if strflags NULL, use this flag value
 351  * @key:        specify list to use
 352  *
 353  * Description:
 354  *      Create and add one dev_info entry for @vendor, @model,
 355  *      @strflags or @flag in list specified by @key. If @compatible,
 356  *      add to the tail of the list, do not space pad, and set
 357  *      devinfo->compatible. The scsi_static_device_list entries are
 358  *      added with @compatible 1 and @clfags NULL.
 359  *
 360  * Returns: 0 OK, -error on failure.
 361  **/
 362 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
 363                                  char *strflags, int flags, int key)
 364 {
 365         struct scsi_dev_info_list *devinfo;
 366         struct scsi_dev_info_list_table *devinfo_table =
 367                 scsi_devinfo_lookup_by_key(key);
 368
 369         if (IS_ERR(devinfo_table))
 370                 return PTR_ERR(devinfo_table);
 371
 372         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 373         if (!devinfo) {
 374                 printk(KERN_ERR "%s: no memory\n", __func__);
 375                 return -ENOMEM;
 376         }
 377
 378         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 379                             vendor, compatible);
 380         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 381                             model, compatible);
 382
 383         if (strflags)
 384                 devinfo->flags = simple_strtoul(strflags, NULL, 0);
 385         else
 386                 devinfo->flags = flags;
 387
 388         devinfo->compatible = compatible;
 389
 390         if (compatible)
 391                 list_add_tail(&devinfo->dev_info_list,
 392                               &devinfo_table->scsi_dev_info_list);
 393         else
 394                 list_add(&devinfo->dev_info_list,
 395                          &devinfo_table->scsi_dev_info_list);
 396
 397         return 0;
 398 }
 399 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
 400
 401 /**
 402  * scsi_dev_info_list_find - find a matching dev_info list entry.
 403  * @vendor:     vendor string
 404  * @model:      model (product) string
 405  * @key:        specify list to use
 406  *
 407  * Description:
 408  *      Finds the first dev_info entry matching @vendor, @model
 409  *      in list specified by @key.
 410  *
 411  * Returns: pointer to matching entry, or ERR_PTR on failure.
 412  **/
 413 static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
 414                 const char *model, int key)
 415 {
 416         struct scsi_dev_info_list *devinfo;
 417         struct scsi_dev_info_list_table *devinfo_table =
 418                 scsi_devinfo_lookup_by_key(key);
 419         size_t vmax, mmax;
 420         const char *vskip, *mskip;
 421
 422         if (IS_ERR(devinfo_table))
 423                 return (struct scsi_dev_info_list *) devinfo_table;
 424
 425         /* Prepare for "compatible" matches */
 426
 427         /*
 428          * XXX why skip leading spaces? If an odd INQUIRY
 429          * value, that should have been part of the
 430          * scsi_static_device_list[] entry, such as "  FOO"
 431          * rather than "FOO". Since this code is already
 432          * here, and we don't know what device it is
 433          * trying to work with, leave it as-is.
 434          */
 435         vmax = sizeof(devinfo->vendor);
 436         vskip = vendor;
 437         while (vmax > 0 && *vskip == ' ') {
 438                 vmax--;
 439                 vskip++;
 440         }
 441         /* Also skip trailing spaces */
 442         while (vmax > 0 && vskip[vmax - 1] == ' ')
 443                 --vmax;
 444
 445         mmax = sizeof(devinfo->model);
 446         mskip = model;
 447         while (mmax > 0 && *mskip == ' ') {
 448                 mmax--;
 449                 mskip++;
 450         }
 451         while (mmax > 0 && mskip[mmax - 1] == ' ')
 452                 --mmax;
 453
 454         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 455                             dev_info_list) {
 456                 if (devinfo->compatible) {
 457                         /*
 458                          * Behave like the older version of get_device_flags.
 459                          */
 460                         if (memcmp(devinfo->vendor, vskip, vmax) ||
 461                                         (vmax < sizeof(devinfo->vendor) &&
 462                                                 devinfo->vendor[vmax]))
 463                                 continue;
 464                         if (memcmp(devinfo->model, mskip, mmax) ||
 465                                         (mmax < sizeof(devinfo->model) &&
 466                                                 devinfo->model[mmax]))
 467                                 continue;
 468                         return devinfo;
 469                 } else {
 470                         if (!memcmp(devinfo->vendor, vendor,
 471                                      sizeof(devinfo->vendor)) &&
 472                              !memcmp(devinfo->model, model,
 473                                       sizeof(devinfo->model)))
 474                                 return devinfo;
 475                 }
 476         }
 477
 478         return ERR_PTR(-ENOENT);
 479 }
 480
 481 /**
 482  * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
 483  * @vendor:     vendor string
 484  * @model:      model (product) string
 485  * @key:        specify list to use
 486  *
 487  * Description:
 488  *      Remove and destroy one dev_info entry for @vendor, @model
 489  *      in list specified by @key.
 490  *
 491  * Returns: 0 OK, -error on failure.
 492  **/
 493 int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key)
 494 {
 495         struct scsi_dev_info_list *found;
 496
 497         found = scsi_dev_info_list_find(vendor, model, key);
 498         if (IS_ERR(found))
 499                 return PTR_ERR(found);
 500
 501         list_del(&found->dev_info_list);
 502         kfree(found);
 503         return 0;
 504 }
 505 EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
 506
 507 /**
 508  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 509  * @dev_list:   string of device flags to add
 510  *
 511  * Description:
 512  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 513  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 514  *      dev_list is modified via strsep. Can be called for command line
 515  *      addition, for proc or mabye a sysfs interface.
 516  *
 517  * Returns: 0 if OK, -error on failure.
 518  **/
 519 static int scsi_dev_info_list_add_str(char *dev_list)
 520 {
 521         char *vendor, *model, *strflags, *next;
 522         char *next_check;
 523         int res = 0;
 524
 525         next = dev_list;
 526         if (next && next[0] == '"') {
 527                 /*
 528                  * Ignore both the leading and trailing quote.
 529                  */
 530                 next++;
 531                 next_check = ",\"";
 532         } else {
 533                 next_check = ",";
 534         }
 535
 536         /*
 537          * For the leading and trailing '"' case, the for loop comes
 538          * through the last time with vendor[0] == '\0'.
 539          */
 540         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 541              && (res == 0); vendor = strsep(&next, ":")) {
 542                 strflags = NULL;
 543                 model = strsep(&next, ":");
 544                 if (model)
 545                         strflags = strsep(&next, next_check);
 546                 if (!model || !strflags) {
 547                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 548                                " '%s'\n", __func__, vendor, model,
 549                                strflags);
 550                         res = -EINVAL;
 551                 } else
 552                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 553                                                      model, strflags, 0);
 554         }
 555         return res;
 556 }
 557
 558 /**
 559  * get_device_flags - get device specific flags from the dynamic device list.
 560  * @sdev:       &scsi_device to get flags for
 561  * @vendor:     vendor name
 562  * @model:      model name
 563  *
 564  * Description:
 565  *     Search the global scsi_dev_info_list (specified by list zero)
 566  *     for an entry matching @vendor and @model, if found, return the
 567  *     matching flags value, else return the host or global default
 568  *     settings.  Called during scan time.
 569  **/
 570 int scsi_get_device_flags(struct scsi_device *sdev,
 571                           const unsigned char *vendor,
 572                           const unsigned char *model)
 573 {
 574         return scsi_get_device_flags_keyed(sdev, vendor, model,
 575                                            SCSI_DEVINFO_GLOBAL);
 576 }
 577
 578
 579 /**
 580  * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
 581  * @sdev:       &scsi_device to get flags for
 582  * @vendor:     vendor name
 583  * @model:      model name
 584  * @key:        list to look up
 585  *
 586  * Description:
 587  *     Search the scsi_dev_info_list specified by @key for an entry
 588  *     matching @vendor and @model, if found, return the matching
 589  *     flags value, else return the host or global default settings.
 590  *     Called during scan time.
 591  **/
 592 int scsi_get_device_flags_keyed(struct scsi_device *sdev,
 593                                 const unsigned char *vendor,
 594                                 const unsigned char *model,
 595                                 int key)
 596 {
 597         struct scsi_dev_info_list *devinfo;
 598         int err;
 599
 600         devinfo = scsi_dev_info_list_find(vendor, model, key);
 601         if (!IS_ERR(devinfo))
 602                 return devinfo->flags;
 603
 604         err = PTR_ERR(devinfo);
 605         if (err != -ENOENT)
 606                 return err;
 607
 608         /* nothing found, return nothing */
 609         if (key != SCSI_DEVINFO_GLOBAL)
 610                 return 0;
 611
 612         /* except for the global list, where we have an exception */
 613         if (sdev->sdev_bflags)
 614                 return sdev->sdev_bflags;
 615
 616         return scsi_default_dev_flags;
 617 }
 618 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
 619
 620 #ifdef CONFIG_SCSI_PROC_FS
 621 struct double_list {
 622         struct list_head *top;
 623         struct list_head *bottom;
 624 };
 625
 626 static int devinfo_seq_show(struct seq_file *m, void *v)
 627 {
 628         struct double_list *dl = v;
 629         struct scsi_dev_info_list_table *devinfo_table =
 630                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 631         struct scsi_dev_info_list *devinfo =
 632                 list_entry(dl->bottom, struct scsi_dev_info_list,
 633                            dev_info_list);
 634
 635         if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
 636             devinfo_table->name)
 637                 seq_printf(m, "[%s]:\n", devinfo_table->name);
 638
 639         seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
 640                    devinfo->vendor, devinfo->model, devinfo->flags);
 641         return 0;
 642 }
 643
 644 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
 645 {
 646         struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
 647         loff_t pos = *ppos;
 648
 649         if (!dl)
 650                 return NULL;
 651
 652         list_for_each(dl->top, &scsi_dev_info_list) {
 653                 struct scsi_dev_info_list_table *devinfo_table =
 654                         list_entry(dl->top, struct scsi_dev_info_list_table,
 655                                    node);
 656                 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
 657                         if (pos-- == 0)
 658                                 return dl;
 659         }
 660
 661         kfree(dl);
 662         return NULL;
 663 }
 664
 665 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
 666 {
 667         struct double_list *dl = v;
 668         struct scsi_dev_info_list_table *devinfo_table =
 669                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 670
 671         ++*ppos;
 672         dl->bottom = dl->bottom->next;
 673         while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
 674                 dl->top = dl->top->next;
 675                 if (dl->top == &scsi_dev_info_list) {
 676                         kfree(dl);
 677                         return NULL;
 678                 }
 679                 devinfo_table = list_entry(dl->top,
 680                                            struct scsi_dev_info_list_table,
 681                                            node);
 682                 dl->bottom = devinfo_table->scsi_dev_info_list.next;
 683         }
 684
 685         return dl;
 686 }
 687
 688 static void devinfo_seq_stop(struct seq_file *m, void *v)
 689 {
 690         kfree(v);
 691 }
 692
 693 static const struct seq_operations scsi_devinfo_seq_ops = {
 694         .start  = devinfo_seq_start,
 695         .next   = devinfo_seq_next,
 696         .stop   = devinfo_seq_stop,
 697         .show   = devinfo_seq_show,
 698 };
 699
 700 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 701 {
 702         return seq_open(file, &scsi_devinfo_seq_ops);
 703 }
 704
 705 /*
 706  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 707  *
 708  * Description: Adds a black/white list entry for vendor and model with an
 709  * integer value of flag to the scsi device info list.
 710  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 711  */
 712 static ssize_t proc_scsi_devinfo_write(struct file *file,
 713                                        const char __user *buf,
 714                                        size_t length, loff_t *ppos)
 715 {
 716         char *buffer;
 717         ssize_t err = length;
 718
 719         if (!buf || length>PAGE_SIZE)
 720                 return -EINVAL;
 721         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 722                 return -ENOMEM;
 723         if (copy_from_user(buffer, buf, length)) {
 724                 err =-EFAULT;
 725                 goto out;
 726         }
 727
 728         if (length < PAGE_SIZE)
 729                 buffer[length] = '\0';
 730         else if (buffer[PAGE_SIZE-1]) {
 731                 err = -EINVAL;
 732                 goto out;
 733         }
 734
 735         scsi_dev_info_list_add_str(buffer);
 736
 737 out:
 738         free_page((unsigned long)buffer);
 739         return err;
 740 }
 741
 742 static const struct file_operations scsi_devinfo_proc_fops = {
 743         .owner          = THIS_MODULE,
 744         .open           = proc_scsi_devinfo_open,
 745         .read           = seq_read,
 746         .write          = proc_scsi_devinfo_write,
 747         .llseek         = seq_lseek,
 748         .release        = seq_release,
 749 };
 750 #endif /* CONFIG_SCSI_PROC_FS */
 751
 752 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 753 MODULE_PARM_DESC(dev_flags,
 754          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 755          " list entries for vendor and model with an integer value of flags"
 756          " to the scsi device info list");
 757
 758 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 759 MODULE_PARM_DESC(default_dev_flags,
 760                  "scsi default device flag integer value");
 761
 762 /**
 763  * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 764  **/
 765 void scsi_exit_devinfo(void)
 766 {
 767 #ifdef CONFIG_SCSI_PROC_FS
 768         remove_proc_entry("scsi/device_info", NULL);
 769 #endif
 770
 771         scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 772 }
 773
 774 /**
 775  * scsi_dev_info_add_list - add a new devinfo list
 776  * @key:        key of the list to add
 777  * @name:       Name of the list to add (for /proc/scsi/device_info)
 778  *
 779  * Adds the requested list, returns zero on success, -EEXIST if the
 780  * key is already registered to a list, or other error on failure.
 781  */
 782 int scsi_dev_info_add_list(int key, const char *name)
 783 {
 784         struct scsi_dev_info_list_table *devinfo_table =
 785                 scsi_devinfo_lookup_by_key(key);
 786
 787         if (!IS_ERR(devinfo_table))
 788                 /* list already exists */
 789                 return -EEXIST;
 790
 791         devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 792
 793         if (!devinfo_table)
 794                 return -ENOMEM;
 795
 796         INIT_LIST_HEAD(&devinfo_table->node);
 797         INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 798         devinfo_table->name = name;
 799         devinfo_table->key = key;
 800         list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 801
 802         return 0;
 803 }
 804 EXPORT_SYMBOL(scsi_dev_info_add_list);
 805
 806 /**
 807  * scsi_dev_info_remove_list - destroy an added devinfo list
 808  * @key: key of the list to destroy
 809  *
 810  * Iterates over the entire list first, freeing all the values, then
 811  * frees the list itself.  Returns 0 on success or -EINVAL if the key
 812  * can't be found.
 813  */
 814 int scsi_dev_info_remove_list(int key)
 815 {
 816         struct list_head *lh, *lh_next;
 817         struct scsi_dev_info_list_table *devinfo_table =
 818                 scsi_devinfo_lookup_by_key(key);
 819
 820         if (IS_ERR(devinfo_table))
 821                 /* no such list */
 822                 return -EINVAL;
 823
 824         /* remove from the master list */
 825         list_del(&devinfo_table->node);
 826
 827         list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 828                 struct scsi_dev_info_list *devinfo;
 829
 830                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 831                                      dev_info_list);
 832                 kfree(devinfo);
 833         }
 834         kfree(devinfo_table);
 835
 836         return 0;
 837 }
 838 EXPORT_SYMBOL(scsi_dev_info_remove_list);
 839
 840 /**
 841  * scsi_init_devinfo - set up the dynamic device list.
 842  *
 843  * Description:
 844  *      Add command line entries from scsi_dev_flags, then add
 845  *      scsi_static_device_list entries to the scsi device info list.
 846  */
 847 int __init scsi_init_devinfo(void)
 848 {
 849 #ifdef CONFIG_SCSI_PROC_FS
 850         struct proc_dir_entry *p;
 851 #endif
 852         int error, i;
 853
 854         error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 855         if (error)
 856                 return error;
 857
 858         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 859         if (error)
 860                 goto out;
 861
 862         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 863                 error = scsi_dev_info_list_add(1 /* compatibile */,
 864                                 scsi_static_device_list[i].vendor,
 865                                 scsi_static_device_list[i].model,
 866                                 NULL,
 867                                 scsi_static_device_list[i].flags);
 868                 if (error)
 869                         goto out;
 870         }
 871
 872 #ifdef CONFIG_SCSI_PROC_FS
 873         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
 874         if (!p) {
 875                 error = -ENOMEM;
 876                 goto out;
 877         }
 878 #endif /* CONFIG_SCSI_PROC_FS */
 879
 880  out:
 881         if (error)
 882                 scsi_exit_devinfo();
 883         return error;
 884 }