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 |
 165          BLIST_REPORTLUN2 | BLIST_RETRY_ITF},
 166         {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
 167         {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
 168         {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
 169         {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
 170         {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 171         {"FUJITSU", "ETERNUS_DXM", "*", BLIST_RETRY_ASC_C1},
 172         {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
 173         {"Generic", "USB Storage-SMC", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36}, /* FW: 0180 and 0207 */
 174         {"HITACHI", "DF400", "*", BLIST_REPORTLUN2},
 175         {"HITACHI", "DF500", "*", BLIST_REPORTLUN2},
 176         {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
 177         {"HITACHI", "HUS1530", "*", BLIST_NO_DIF},
 178         {"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES},
 179         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 180         {"HP", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES}, /* HP XP Arrays */
 181         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 182         {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 183         {"HP", "C1557A", NULL, BLIST_FORCELUN},
 184         {"HP", "C3323-300", "4269", BLIST_NOTQ},
 185         {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
 186         {"HP", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
 187         {"HPE", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES},
 188         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 189         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 190         {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
 191         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 192         {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
 193         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 194         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 195         {"INSITE", "I325VM", NULL, BLIST_KEY},
 196         {"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
 197         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 198         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 199         {"Marvell", "Console", NULL, BLIST_SKIP_VPD_PAGES},
 200         {"Marvell", "91xx Config", "1.01", BLIST_SKIP_VPD_PAGES},
 201         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 202         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 203         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 204         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 205         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 206         {"MICROP", "4110", NULL, BLIST_NOTQ},
 207         {"MSFT", "Virtual HD", NULL, BLIST_MAX_1024 | BLIST_NO_RSOC},
 208         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 209         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 210         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 211         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 212         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 213         {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 214         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 215         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 216         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 217         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 218         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 219         {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 220         {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
 221         {"Promise", "", NULL, BLIST_SPARSELUN},
 222         {"QEMU", "QEMU CD-ROM", NULL, BLIST_SKIP_VPD_PAGES},
 223         {"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
 224         {"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
 225         {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 226         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 227         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 228         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 229         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 230         {"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
 231         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 232         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 233         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 234         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 235         {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 236         {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 237         {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 238         {"STK", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 239         {"NETAPP", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 240         {"LSI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 241         {"ENGENIO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 242         {"LENOVO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 243         {"FUJITSU", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 244         {"SanDisk", "Cruzer Blade", NULL, BLIST_TRY_VPD_PAGES |
 245                 BLIST_INQUIRY_36},
 246         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 247         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 248         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 249         {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 250         {"SUN", "T300", "*", BLIST_SPARSELUN},
 251         {"SUN", "T4", "*", BLIST_SPARSELUN},
 252         {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 253         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 254         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 255         {"Traxdata", "CDR4120", NULL, BLIST_NOLUN},     /* locks up */
 256         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 257         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 258         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 259         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 260         {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 261         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 262         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 263         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 264         { NULL, NULL, NULL, 0 },
 265 };
 266
 267 static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
 268 {
 269         struct scsi_dev_info_list_table *devinfo_table;
 270         int found = 0;
 271
 272         list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
 273                 if (devinfo_table->key == key) {
 274                         found = 1;
 275                         break;
 276                 }
 277         if (!found)
 278                 return ERR_PTR(-EINVAL);
 279
 280         return devinfo_table;
 281 }
 282
 283 /*
 284  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 285  * devinfo vendor and model strings.
 286  */
 287 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 288                                 char *from, int compatible)
 289 {
 290         size_t from_length;
 291
 292         from_length = strlen(from);
 293         /* This zero-pads the destination */
 294         strncpy(to, from, to_length);
 295         if (from_length < to_length && !compatible) {
 296                 /*
 297                  * space pad the string if it is short.
 298                  */
 299                 memset(&to[from_length], ' ', to_length - from_length);
 300         }
 301         if (from_length > to_length)
 302                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 303                         __func__, name, from);
 304 }
 305
 306 /**
 307  * scsi_dev_info_list_add - add one dev_info list entry.
 308  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 309  * @vendor:     vendor string
 310  * @model:      model (product) string
 311  * @strflags:   integer string
 312  * @flags:      if strflags NULL, use this flag value
 313  *
 314  * Description:
 315  *      Create and add one dev_info entry for @vendor, @model, @strflags or
 316  *      @flag. If @compatible, add to the tail of the list, do not space
 317  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 318  *      are added with @compatible 1 and @clfags NULL.
 319  *
 320  * Returns: 0 OK, -error on failure.
 321  **/
 322 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 323                             char *strflags, blist_flags_t flags)
 324 {
 325         return scsi_dev_info_list_add_keyed(compatible, vendor, model,
 326                                             strflags, flags,
 327                                             SCSI_DEVINFO_GLOBAL);
 328 }
 329
 330 /**
 331  * scsi_dev_info_list_add_keyed - add one dev_info list entry.
 332  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 333  * @vendor:     vendor string
 334  * @model:      model (product) string
 335  * @strflags:   integer string
 336  * @flags:      if strflags NULL, use this flag value
 337  * @key:        specify list to use
 338  *
 339  * Description:
 340  *      Create and add one dev_info entry for @vendor, @model,
 341  *      @strflags or @flag in list specified by @key. If @compatible,
 342  *      add to the tail of the list, do not space pad, and set
 343  *      devinfo->compatible. The scsi_static_device_list entries are
 344  *      added with @compatible 1 and @clfags NULL.
 345  *
 346  * Returns: 0 OK, -error on failure.
 347  **/
 348 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
 349                                  char *strflags, blist_flags_t flags,
 350                                  enum scsi_devinfo_key key)
 351 {
 352         struct scsi_dev_info_list *devinfo;
 353         struct scsi_dev_info_list_table *devinfo_table =
 354                 scsi_devinfo_lookup_by_key(key);
 355
 356         if (IS_ERR(devinfo_table))
 357                 return PTR_ERR(devinfo_table);
 358
 359         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 360         if (!devinfo) {
 361                 printk(KERN_ERR "%s: no memory\n", __func__);
 362                 return -ENOMEM;
 363         }
 364
 365         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 366                             vendor, compatible);
 367         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 368                             model, compatible);
 369
 370         if (strflags) {
 371                 unsigned long long val;
 372                 int ret = kstrtoull(strflags, 0, &val);
 373
 374                 if (ret != 0) {
 375                         kfree(devinfo);
 376                         return ret;
 377                 }
 378                 flags = (__force blist_flags_t)val;
 379         }
 380         if (flags & __BLIST_UNUSED_MASK) {
 381                 pr_err("scsi_devinfo (%s:%s): unsupported flags 0x%llx",
 382                        vendor, model, flags & __BLIST_UNUSED_MASK);
 383                 kfree(devinfo);
 384                 return -EINVAL;
 385         }
 386         devinfo->flags = flags;
 387         devinfo->compatible = compatible;
 388
 389         if (compatible)
 390                 list_add_tail(&devinfo->dev_info_list,
 391                               &devinfo_table->scsi_dev_info_list);
 392         else
 393                 list_add(&devinfo->dev_info_list,
 394                          &devinfo_table->scsi_dev_info_list);
 395
 396         return 0;
 397 }
 398 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
 399
 400 /**
 401  * scsi_dev_info_list_find - find a matching dev_info list entry.
 402  * @vendor:     full vendor string
 403  * @model:      full model (product) string
 404  * @key:        specify list to use
 405  *
 406  * Description:
 407  *      Finds the first dev_info entry matching @vendor, @model
 408  *      in list specified by @key.
 409  *
 410  * Returns: pointer to matching entry, or ERR_PTR on failure.
 411  **/
 412 static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
 413                 const char *model, enum scsi_devinfo_key key)
 414 {
 415         struct scsi_dev_info_list *devinfo;
 416         struct scsi_dev_info_list_table *devinfo_table =
 417                 scsi_devinfo_lookup_by_key(key);
 418         size_t vmax, mmax, mlen;
 419         const char *vskip, *mskip;
 420
 421         if (IS_ERR(devinfo_table))
 422                 return (struct scsi_dev_info_list *) devinfo_table;
 423
 424         /* Prepare for "compatible" matches */
 425
 426         /*
 427          * XXX why skip leading spaces? If an odd INQUIRY
 428          * value, that should have been part of the
 429          * scsi_static_device_list[] entry, such as "  FOO"
 430          * rather than "FOO". Since this code is already
 431          * here, and we don't know what device it is
 432          * trying to work with, leave it as-is.
 433          */
 434         vmax = sizeof(devinfo->vendor);
 435         vskip = vendor;
 436         while (vmax > 0 && *vskip == ' ') {
 437                 vmax--;
 438                 vskip++;
 439         }
 440         /* Also skip trailing spaces */
 441         while (vmax > 0 && vskip[vmax - 1] == ' ')
 442                 --vmax;
 443
 444         mmax = sizeof(devinfo->model);
 445         mskip = model;
 446         while (mmax > 0 && *mskip == ' ') {
 447                 mmax--;
 448                 mskip++;
 449         }
 450         while (mmax > 0 && mskip[mmax - 1] == ' ')
 451                 --mmax;
 452
 453         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 454                             dev_info_list) {
 455                 if (devinfo->compatible) {
 456                         /*
 457                          * vendor strings must be an exact match
 458                          */
 459                         if (vmax != strnlen(devinfo->vendor,
 460                                             sizeof(devinfo->vendor)) ||
 461                             memcmp(devinfo->vendor, vskip, vmax))
 462                                 continue;
 463
 464                         /*
 465                          * @model specifies the full string, and
 466                          * must be larger or equal to devinfo->model
 467                          */
 468                         mlen = strnlen(devinfo->model, sizeof(devinfo->model));
 469                         if (mmax < mlen || memcmp(devinfo->model, mskip, mlen))
 470                                 continue;
 471                         return devinfo;
 472                 } else {
 473                         if (!memcmp(devinfo->vendor, vendor,
 474                                     sizeof(devinfo->vendor)) &&
 475                             !memcmp(devinfo->model, model,
 476                                     sizeof(devinfo->model)))
 477                                 return devinfo;
 478                 }
 479         }
 480
 481         return ERR_PTR(-ENOENT);
 482 }
 483
 484 /**
 485  * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
 486  * @vendor:     vendor string
 487  * @model:      model (product) string
 488  * @key:        specify list to use
 489  *
 490  * Description:
 491  *      Remove and destroy one dev_info entry for @vendor, @model
 492  *      in list specified by @key.
 493  *
 494  * Returns: 0 OK, -error on failure.
 495  **/
 496 int scsi_dev_info_list_del_keyed(char *vendor, char *model,
 497                                  enum scsi_devinfo_key key)
 498 {
 499         struct scsi_dev_info_list *found;
 500
 501         found = scsi_dev_info_list_find(vendor, model, key);
 502         if (IS_ERR(found))
 503                 return PTR_ERR(found);
 504
 505         list_del(&found->dev_info_list);
 506         kfree(found);
 507         return 0;
 508 }
 509 EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
 510
 511 /**
 512  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 513  * @dev_list:   string of device flags to add
 514  *
 515  * Description:
 516  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 517  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 518  *      dev_list is modified via strsep. Can be called for command line
 519  *      addition, for proc or mabye a sysfs interface.
 520  *
 521  * Returns: 0 if OK, -error on failure.
 522  **/
 523 static int scsi_dev_info_list_add_str(char *dev_list)
 524 {
 525         char *vendor, *model, *strflags, *next;
 526         char *next_check;
 527         int res = 0;
 528
 529         next = dev_list;
 530         if (next && next[0] == '"') {
 531                 /*
 532                  * Ignore both the leading and trailing quote.
 533                  */
 534                 next++;
 535                 next_check = ",\"";
 536         } else {
 537                 next_check = ",";
 538         }
 539
 540         /*
 541          * For the leading and trailing '"' case, the for loop comes
 542          * through the last time with vendor[0] == '\0'.
 543          */
 544         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 545              && (res == 0); vendor = strsep(&next, ":")) {
 546                 strflags = NULL;
 547                 model = strsep(&next, ":");
 548                 if (model)
 549                         strflags = strsep(&next, next_check);
 550                 if (!model || !strflags) {
 551                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 552                                " '%s'\n", __func__, vendor, model,
 553                                strflags);
 554                         res = -EINVAL;
 555                 } else
 556                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 557                                                      model, strflags, 0);
 558         }
 559         return res;
 560 }
 561
 562 /**
 563  * scsi_get_device_flags - get device specific flags from the dynamic
 564  *      device list.
 565  * @sdev:       &scsi_device to get flags for
 566  * @vendor:     vendor name
 567  * @model:      model name
 568  *
 569  * Description:
 570  *     Search the global scsi_dev_info_list (specified by list zero)
 571  *     for an entry matching @vendor and @model, if found, return the
 572  *     matching flags value, else return the host or global default
 573  *     settings.  Called during scan time.
 574  **/
 575 blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
 576                                     const unsigned char *vendor,
 577                                     const unsigned char *model)
 578 {
 579         return scsi_get_device_flags_keyed(sdev, vendor, model,
 580                                            SCSI_DEVINFO_GLOBAL);
 581 }
 582
 583
 584 /**
 585  * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
 586  * @sdev:       &scsi_device to get flags for
 587  * @vendor:     vendor name
 588  * @model:      model name
 589  * @key:        list to look up
 590  *
 591  * Description:
 592  *     Search the scsi_dev_info_list specified by @key for an entry
 593  *     matching @vendor and @model, if found, return the matching
 594  *     flags value, else return the host or global default settings.
 595  *     Called during scan time.
 596  **/
 597 blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
 598                                 const unsigned char *vendor,
 599                                 const unsigned char *model,
 600                                 enum scsi_devinfo_key key)
 601 {
 602         struct scsi_dev_info_list *devinfo;
 603
 604         devinfo = scsi_dev_info_list_find(vendor, model, key);
 605         if (!IS_ERR(devinfo))
 606                 return devinfo->flags;
 607
 608         /* key or device not 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%llx\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 proc_ops scsi_devinfo_proc_ops = {
 743         .proc_open      = proc_scsi_devinfo_open,
 744         .proc_read      = seq_read,
 745         .proc_write     = proc_scsi_devinfo_write,
 746         .proc_lseek     = seq_lseek,
 747         .proc_release   = seq_release,
 748 };
 749 #endif /* CONFIG_SCSI_PROC_FS */
 750
 751 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 752 MODULE_PARM_DESC(dev_flags,
 753          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 754          " list entries for vendor and model with an integer value of flags"
 755          " to the scsi device info list");
 756
 757 module_param_named(default_dev_flags, scsi_default_dev_flags, ullong, 0644);
 758 MODULE_PARM_DESC(default_dev_flags,
 759                  "scsi default device flag uint64_t value");
 760
 761 /**
 762  * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 763  **/
 764 void scsi_exit_devinfo(void)
 765 {
 766 #ifdef CONFIG_SCSI_PROC_FS
 767         remove_proc_entry("scsi/device_info", NULL);
 768 #endif
 769
 770         scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 771 }
 772
 773 /**
 774  * scsi_dev_info_add_list - add a new devinfo list
 775  * @key:        key of the list to add
 776  * @name:       Name of the list to add (for /proc/scsi/device_info)
 777  *
 778  * Adds the requested list, returns zero on success, -EEXIST if the
 779  * key is already registered to a list, or other error on failure.
 780  */
 781 int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name)
 782 {
 783         struct scsi_dev_info_list_table *devinfo_table =
 784                 scsi_devinfo_lookup_by_key(key);
 785
 786         if (!IS_ERR(devinfo_table))
 787                 /* list already exists */
 788                 return -EEXIST;
 789
 790         devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 791
 792         if (!devinfo_table)
 793                 return -ENOMEM;
 794
 795         INIT_LIST_HEAD(&devinfo_table->node);
 796         INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 797         devinfo_table->name = name;
 798         devinfo_table->key = key;
 799         list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 800
 801         return 0;
 802 }
 803 EXPORT_SYMBOL(scsi_dev_info_add_list);
 804
 805 /**
 806  * scsi_dev_info_remove_list - destroy an added devinfo list
 807  * @key: key of the list to destroy
 808  *
 809  * Iterates over the entire list first, freeing all the values, then
 810  * frees the list itself.  Returns 0 on success or -EINVAL if the key
 811  * can't be found.
 812  */
 813 int scsi_dev_info_remove_list(enum scsi_devinfo_key key)
 814 {
 815         struct list_head *lh, *lh_next;
 816         struct scsi_dev_info_list_table *devinfo_table =
 817                 scsi_devinfo_lookup_by_key(key);
 818
 819         if (IS_ERR(devinfo_table))
 820                 /* no such list */
 821                 return -EINVAL;
 822
 823         /* remove from the master list */
 824         list_del(&devinfo_table->node);
 825
 826         list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 827                 struct scsi_dev_info_list *devinfo;
 828
 829                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 830                                      dev_info_list);
 831                 kfree(devinfo);
 832         }
 833         kfree(devinfo_table);
 834
 835         return 0;
 836 }
 837 EXPORT_SYMBOL(scsi_dev_info_remove_list);
 838
 839 /**
 840  * scsi_init_devinfo - set up the dynamic device list.
 841  *
 842  * Description:
 843  *      Add command line entries from scsi_dev_flags, then add
 844  *      scsi_static_device_list entries to the scsi device info list.
 845  */
 846 int __init scsi_init_devinfo(void)
 847 {
 848 #ifdef CONFIG_SCSI_PROC_FS
 849         struct proc_dir_entry *p;
 850 #endif
 851         int error, i;
 852
 853         error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 854         if (error)
 855                 return error;
 856
 857         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 858         if (error)
 859                 goto out;
 860
 861         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 862                 error = scsi_dev_info_list_add(1 /* compatibile */,
 863                                 scsi_static_device_list[i].vendor,
 864                                 scsi_static_device_list[i].model,
 865                                 NULL,
 866                                 scsi_static_device_list[i].flags);
 867                 if (error)
 868                         goto out;
 869         }
 870
 871 #ifdef CONFIG_SCSI_PROC_FS
 872         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_ops);
 873         if (!p) {
 874                 error = -ENOMEM;
 875                 goto out;
 876         }
 877 #endif /* CONFIG_SCSI_PROC_FS */
 878
 879  out:
 880         if (error)
 881                 scsi_exit_devinfo();
 882         return error;
 883 }