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: list of devices that require settings that differ
  43  * from the default, includes black-listed (broken) devices. The entries here
  44  * are added to the tail of scsi_dev_info_list via scsi_dev_info_list_init.
  45  *
  46  * If possible, set the BLIST_* flags from inside a SCSI LLD rather than
  47  * adding an entry to this list.
  48  */
  49 static struct {
  50         char *vendor;
  51         char *model;
  52         char *revision; /* revision known to be bad, unused */
  53         blist_flags_t flags;
  54 } scsi_static_device_list[] __initdata = {
  55         /*
  56          * The following devices are known not to tolerate a lun != 0 scan
  57          * for one reason or another. Some will respond to all luns,
  58          * others will lock up.
  59          */
  60         {"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN},     /* locks up */
  61         {"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN},       /* locks up */
  62         {"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN},       /* locks up */
  63         {"DENON", "DRD-25X", "V", BLIST_NOLUN},                 /* locks up */
  64         {"HITACHI", "DK312C", "CM81", BLIST_NOLUN},     /* responds to all lun */
  65         {"HITACHI", "DK314C", "CR21", BLIST_NOLUN},     /* responds to all lun */
  66         {"IBM", "2104-DU3", NULL, BLIST_NOLUN},         /* locks up */
  67         {"IBM", "2104-TU3", NULL, BLIST_NOLUN},         /* locks up */
  68         {"IMS", "CDD521/10", "2.06", BLIST_NOLUN},      /* locks up */
  69         {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN},     /* locks up */
  70         {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN},     /* locks up */
  71         {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN},   /* locks up */
  72         {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN},     /* locks up */
  73         {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN},     /* locks up */
  74         {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN},    /* responds to all lun */
  75         {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN},      /* responds to all lun */
  76         {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
  77         {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN},    /* responds to all lun */
  78         {"RODIME", "RO3000S", "2.33", BLIST_NOLUN},     /* locks up */
  79         {"SUN", "SENA", NULL, BLIST_NOLUN},             /* responds to all luns */
  80         /*
  81          * The following causes a failed REQUEST SENSE on lun 1 for
  82          * aha152x controller, which causes SCSI code to reset bus.
  83          */
  84         {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
  85         /*
  86          * The following causes a failed REQUEST SENSE on lun 1 for
  87          * aha152x controller, which causes SCSI code to reset bus.
  88          */
  89         {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
  90         {"SEAGATE", "ST296", "921", BLIST_NOLUN},       /* responds to all lun */
  91         {"SEAGATE", "ST1581", "6538", BLIST_NOLUN},     /* responds to all lun */
  92         {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
  93         {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
  94         {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
  95         {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
  96         {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
  97         {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN},   /* locks up */
  98         {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN},       /* locks up */
  99         /*
 100          * The following causes a failed REQUEST SENSE on lun 1 for
 101          * seagate controller, which causes SCSI code to reset bus.
 102          */
 103         {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
 104         {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN},        /* responds to all lun */
 105         /*
 106          * The following causes a failed REQUEST SENSE on lun 1 for
 107          * seagate controller, which causes SCSI code to reset bus.
 108          */
 109         {"HP", "C1750A", "3226", BLIST_NOLUN},          /* scanjet iic */
 110         {"HP", "C1790A", NULL, BLIST_NOLUN},            /* scanjet iip */
 111         {"HP", "C2500A", NULL, BLIST_NOLUN},            /* scanjet iicx */
 112         {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
 113         {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN},      /* responds to all lun */
 114         {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN},     /* locks up */
 115         {"NEC", "D3856", "0009", BLIST_NOLUN},
 116         {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN},    /* locks up */
 117         {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN},    /* locks up */
 118         {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN},    /* locks up */
 119         {"RELISYS", "Scorpio", NULL, BLIST_NOLUN},      /* responds to all lun */
 120         {"SANKYO", "CP525", "6.64", BLIST_NOLUN},       /* causes failed REQ SENSE, extra reset */
 121         {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN | BLIST_BORKEN},
 122         {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
 123         {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN},      /* locks up */
 124         {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN},      /* locks up */
 125         {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN},     /* locks up */
 126         {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN},    /* locks up */
 127         {"", "Scanner", "1.80", BLIST_NOLUN},   /* responds to all lun */
 128
 129         /*
 130          * Other types of devices that have special flags.
 131          * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
 132          */
 133         {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
 134         {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
 135         {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
 136         {"AIX", "VDASD", NULL, BLIST_TRY_VPD_PAGES | BLIST_NO_VPD_SIZE},
 137         {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
 138         {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_FORCELUN | BLIST_INQUIRY_36},
 139         {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
 140         {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
 141         {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
 142         {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
 143         {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
 144         {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
 145         {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
 146         {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
 147                 BLIST_MAX_512 | BLIST_REPORTLUN2},      /* Compaq RA4x00 */
 148         {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
 149         {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
 150         {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 151         {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 152         {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 153         {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
 154         {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 155         {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
 156         {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
 157         {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
 158         {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
 159         {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
 160         {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* EMC CLARiiON, storage on LUN 0 */
 161         {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* EMC CLARiiON, no storage on LUN 0 */
 162         {"EMC",  "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 163         {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
 164          BLIST_REPORTLUN2 | BLIST_RETRY_ITF},
 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         {"FUJITSU", "ETERNUS_DXM", "*", BLIST_RETRY_ASC_C1},
 171         {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
 172         {"Generic", "USB Storage-SMC", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36}, /* FW: 0180 and 0207 */
 173         {"Generic", "Ultra HS-SD/MMC", "2.09", BLIST_IGN_MEDIA_CHANGE | BLIST_INQUIRY_36},
 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", "2076", NULL, BLIST_NO_VPD_SIZE},
 191         {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
 192         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 193         {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
 194         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 195         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 196         {"INSITE", "I325VM", NULL, BLIST_KEY},
 197         {"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
 198         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 199         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 200         {"Marvell", "Console", NULL, BLIST_SKIP_VPD_PAGES},
 201         {"Marvell", "91xx Config", "1.01", BLIST_SKIP_VPD_PAGES},
 202         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 203         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 204         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 205         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 206         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 207         {"MICROP", "4110", NULL, BLIST_NOTQ},
 208         {"MSFT", "Virtual HD", NULL, BLIST_MAX_1024 | BLIST_NO_RSOC},
 209         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 210         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 211         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 212         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 213         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 214         {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 215         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 216         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 217         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 218         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 219         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 220         {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 221         {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
 222         {"Promise", "", NULL, BLIST_SPARSELUN},
 223         {"QEMU", "QEMU CD-ROM", NULL, BLIST_SKIP_VPD_PAGES},
 224         {"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
 225         {"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
 226         {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 227         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 228         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 229         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 230         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 231         {"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
 232         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 233         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 234         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 235         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 236         {"SKhynix", "H28U74301AMR", NULL, BLIST_SKIP_VPD_PAGES},
 237         {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 238         {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 239         {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 240         {"STK", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 241         {"NETAPP", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 242         {"LSI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 243         {"ENGENIO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 244         {"LENOVO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 245         {"FUJITSU", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 246         {"SanDisk", "Cruzer Blade", NULL, BLIST_TRY_VPD_PAGES |
 247                 BLIST_INQUIRY_36},
 248         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 249         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 250         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 251         {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 252         {"SUN", "T300", "*", BLIST_SPARSELUN},
 253         {"SUN", "T4", "*", BLIST_SPARSELUN},
 254         {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 255         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 256         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 257         {"Traxdata", "CDR4120", NULL, BLIST_NOLUN},     /* locks up */
 258         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 259         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 260         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 261         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 262         {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 263         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 264         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 265         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 266         { NULL, NULL, NULL, 0 },
 267 };
 268
 269 static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
 270 {
 271         struct scsi_dev_info_list_table *devinfo_table;
 272         int found = 0;
 273
 274         list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
 275                 if (devinfo_table->key == key) {
 276                         found = 1;
 277                         break;
 278                 }
 279         if (!found)
 280                 return ERR_PTR(-EINVAL);
 281
 282         return devinfo_table;
 283 }
 284
 285 /*
 286  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 287  * devinfo vendor and model strings.
 288  */
 289 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 290                                 char *from, int compatible)
 291 {
 292         size_t from_length;
 293
 294         from_length = strlen(from);
 295
 296         /*
 297          * null pad and null terminate if compatible
 298          * otherwise space pad
 299          */
 300         if (compatible)
 301                 strscpy_pad(to, from, to_length);
 302         else
 303                 memcpy_and_pad(to, to_length, from, from_length, ' ');
 304
 305         if (from_length > to_length)
 306                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 307                         __func__, name, from);
 308 }
 309
 310 /**
 311  * scsi_dev_info_list_add - add one dev_info list entry.
 312  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 313  * @vendor:     vendor string
 314  * @model:      model (product) string
 315  * @strflags:   integer string
 316  * @flags:      if strflags NULL, use this flag value
 317  *
 318  * Description:
 319  *      Create and add one dev_info entry for @vendor, @model, @strflags or
 320  *      @flag. If @compatible, add to the tail of the list, do not space
 321  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 322  *      are added with @compatible 1 and @clfags NULL.
 323  *
 324  * Returns: 0 OK, -error on failure.
 325  **/
 326 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 327                             char *strflags, blist_flags_t flags)
 328 {
 329         return scsi_dev_info_list_add_keyed(compatible, vendor, model,
 330                                             strflags, flags,
 331                                             SCSI_DEVINFO_GLOBAL);
 332 }
 333
 334 /**
 335  * scsi_dev_info_list_add_keyed - add one dev_info list entry.
 336  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 337  * @vendor:     vendor string
 338  * @model:      model (product) string
 339  * @strflags:   integer string
 340  * @flags:      if strflags NULL, use this flag value
 341  * @key:        specify list to use
 342  *
 343  * Description:
 344  *      Create and add one dev_info entry for @vendor, @model,
 345  *      @strflags or @flag in list specified by @key. If @compatible,
 346  *      add to the tail of the list, do not space pad, and set
 347  *      devinfo->compatible. The scsi_static_device_list entries are
 348  *      added with @compatible 1 and @clfags NULL.
 349  *
 350  * Returns: 0 OK, -error on failure.
 351  **/
 352 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
 353                                  char *strflags, blist_flags_t flags,
 354                                  enum scsi_devinfo_key key)
 355 {
 356         struct scsi_dev_info_list *devinfo;
 357         struct scsi_dev_info_list_table *devinfo_table =
 358                 scsi_devinfo_lookup_by_key(key);
 359
 360         if (IS_ERR(devinfo_table))
 361                 return PTR_ERR(devinfo_table);
 362
 363         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 364         if (!devinfo) {
 365                 printk(KERN_ERR "%s: no memory\n", __func__);
 366                 return -ENOMEM;
 367         }
 368
 369         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 370                             vendor, compatible);
 371         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 372                             model, compatible);
 373
 374         if (strflags) {
 375                 unsigned long long val;
 376                 int ret = kstrtoull(strflags, 0, &val);
 377
 378                 if (ret != 0) {
 379                         kfree(devinfo);
 380                         return ret;
 381                 }
 382                 flags = (__force blist_flags_t)val;
 383         }
 384         if (flags & __BLIST_UNUSED_MASK) {
 385                 pr_err("scsi_devinfo (%s:%s): unsupported flags 0x%llx",
 386                        vendor, model, flags & __BLIST_UNUSED_MASK);
 387                 kfree(devinfo);
 388                 return -EINVAL;
 389         }
 390         devinfo->flags = flags;
 391         devinfo->compatible = compatible;
 392
 393         if (compatible)
 394                 list_add_tail(&devinfo->dev_info_list,
 395                               &devinfo_table->scsi_dev_info_list);
 396         else
 397                 list_add(&devinfo->dev_info_list,
 398                          &devinfo_table->scsi_dev_info_list);
 399
 400         return 0;
 401 }
 402 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
 403
 404 /**
 405  * scsi_dev_info_list_find - find a matching dev_info list entry.
 406  * @vendor:     full vendor string
 407  * @model:      full model (product) string
 408  * @key:        specify list to use
 409  *
 410  * Description:
 411  *      Finds the first dev_info entry matching @vendor, @model
 412  *      in list specified by @key.
 413  *
 414  * Returns: pointer to matching entry, or ERR_PTR on failure.
 415  **/
 416 static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
 417                 const char *model, enum scsi_devinfo_key key)
 418 {
 419         struct scsi_dev_info_list *devinfo;
 420         struct scsi_dev_info_list_table *devinfo_table =
 421                 scsi_devinfo_lookup_by_key(key);
 422         size_t vmax, mmax, mlen;
 423         const char *vskip, *mskip;
 424
 425         if (IS_ERR(devinfo_table))
 426                 return (struct scsi_dev_info_list *) devinfo_table;
 427
 428         /* Prepare for "compatible" matches */
 429
 430         /*
 431          * XXX why skip leading spaces? If an odd INQUIRY
 432          * value, that should have been part of the
 433          * scsi_static_device_list[] entry, such as "  FOO"
 434          * rather than "FOO". Since this code is already
 435          * here, and we don't know what device it is
 436          * trying to work with, leave it as-is.
 437          */
 438         vmax = sizeof(devinfo->vendor);
 439         vskip = vendor;
 440         while (vmax > 0 && *vskip == ' ') {
 441                 vmax--;
 442                 vskip++;
 443         }
 444         /* Also skip trailing spaces */
 445         while (vmax > 0 && vskip[vmax - 1] == ' ')
 446                 --vmax;
 447
 448         mmax = sizeof(devinfo->model);
 449         mskip = model;
 450         while (mmax > 0 && *mskip == ' ') {
 451                 mmax--;
 452                 mskip++;
 453         }
 454         while (mmax > 0 && mskip[mmax - 1] == ' ')
 455                 --mmax;
 456
 457         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 458                             dev_info_list) {
 459                 if (devinfo->compatible) {
 460                         /*
 461                          * vendor strings must be an exact match
 462                          */
 463                         if (vmax != strnlen(devinfo->vendor,
 464                                             sizeof(devinfo->vendor)) ||
 465                             memcmp(devinfo->vendor, vskip, vmax))
 466                                 continue;
 467
 468                         /*
 469                          * @model specifies the full string, and
 470                          * must be larger or equal to devinfo->model
 471                          */
 472                         mlen = strnlen(devinfo->model, sizeof(devinfo->model));
 473                         if (mmax < mlen || memcmp(devinfo->model, mskip, mlen))
 474                                 continue;
 475                         return devinfo;
 476                 } else {
 477                         if (!memcmp(devinfo->vendor, vendor,
 478                                     sizeof(devinfo->vendor)) &&
 479                             !memcmp(devinfo->model, model,
 480                                     sizeof(devinfo->model)))
 481                                 return devinfo;
 482                 }
 483         }
 484
 485         return ERR_PTR(-ENOENT);
 486 }
 487
 488 /**
 489  * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
 490  * @vendor:     vendor string
 491  * @model:      model (product) string
 492  * @key:        specify list to use
 493  *
 494  * Description:
 495  *      Remove and destroy one dev_info entry for @vendor, @model
 496  *      in list specified by @key.
 497  *
 498  * Returns: 0 OK, -error on failure.
 499  **/
 500 int scsi_dev_info_list_del_keyed(char *vendor, char *model,
 501                                  enum scsi_devinfo_key key)
 502 {
 503         struct scsi_dev_info_list *found;
 504
 505         found = scsi_dev_info_list_find(vendor, model, key);
 506         if (IS_ERR(found))
 507                 return PTR_ERR(found);
 508
 509         list_del(&found->dev_info_list);
 510         kfree(found);
 511         return 0;
 512 }
 513 EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
 514
 515 /**
 516  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 517  * @dev_list:   string of device flags to add
 518  *
 519  * Description:
 520  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 521  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 522  *      dev_list is modified via strsep. Can be called for command line
 523  *      addition, for proc or mabye a sysfs interface.
 524  *
 525  * Returns: 0 if OK, -error on failure.
 526  **/
 527 static int scsi_dev_info_list_add_str(char *dev_list)
 528 {
 529         char *vendor, *model, *strflags, *next;
 530         char *next_check;
 531         int res = 0;
 532
 533         next = dev_list;
 534         if (next && next[0] == '"') {
 535                 /*
 536                  * Ignore both the leading and trailing quote.
 537                  */
 538                 next++;
 539                 next_check = ",\"";
 540         } else {
 541                 next_check = ",";
 542         }
 543
 544         /*
 545          * For the leading and trailing '"' case, the for loop comes
 546          * through the last time with vendor[0] == '\0'.
 547          */
 548         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 549              && (res == 0); vendor = strsep(&next, ":")) {
 550                 strflags = NULL;
 551                 model = strsep(&next, ":");
 552                 if (model)
 553                         strflags = strsep(&next, next_check);
 554                 if (!model || !strflags) {
 555                         pr_err("%s: bad dev info string '%s' '%s' '%s'\n",
 556                                __func__, vendor, model ? model : "",
 557                                strflags ? strflags : "");
 558                         res = -EINVAL;
 559                 } else
 560                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 561                                                      model, strflags, 0);
 562         }
 563         return res;
 564 }
 565
 566 /**
 567  * scsi_get_device_flags - get device specific flags from the dynamic
 568  *      device list.
 569  * @sdev:       &scsi_device to get flags for
 570  * @vendor:     vendor name
 571  * @model:      model name
 572  *
 573  * Description:
 574  *     Search the global scsi_dev_info_list (specified by list zero)
 575  *     for an entry matching @vendor and @model, if found, return the
 576  *     matching flags value, else return the host or global default
 577  *     settings.  Called during scan time.
 578  **/
 579 blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
 580                                     const unsigned char *vendor,
 581                                     const unsigned char *model)
 582 {
 583         return scsi_get_device_flags_keyed(sdev, vendor, model,
 584                                            SCSI_DEVINFO_GLOBAL);
 585 }
 586
 587
 588 /**
 589  * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
 590  * @sdev:       &scsi_device to get flags for
 591  * @vendor:     vendor name
 592  * @model:      model name
 593  * @key:        list to look up
 594  *
 595  * Description:
 596  *     Search the scsi_dev_info_list specified by @key for an entry
 597  *     matching @vendor and @model, if found, return the matching
 598  *     flags value, else return the host or global default settings.
 599  *     Called during scan time.
 600  **/
 601 blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
 602                                 const unsigned char *vendor,
 603                                 const unsigned char *model,
 604                                 enum scsi_devinfo_key key)
 605 {
 606         struct scsi_dev_info_list *devinfo;
 607
 608         devinfo = scsi_dev_info_list_find(vendor, model, key);
 609         if (!IS_ERR(devinfo))
 610                 return devinfo->flags;
 611
 612         /* key or device not found: return nothing */
 613         if (key != SCSI_DEVINFO_GLOBAL)
 614                 return 0;
 615
 616         /* except for the global list, where we have an exception */
 617         if (sdev->sdev_bflags)
 618                 return sdev->sdev_bflags;
 619
 620         return scsi_default_dev_flags;
 621 }
 622 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
 623
 624 #ifdef CONFIG_SCSI_PROC_FS
 625 struct double_list {
 626         struct list_head *top;
 627         struct list_head *bottom;
 628 };
 629
 630 static int devinfo_seq_show(struct seq_file *m, void *v)
 631 {
 632         struct double_list *dl = v;
 633         struct scsi_dev_info_list_table *devinfo_table =
 634                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 635         struct scsi_dev_info_list *devinfo =
 636                 list_entry(dl->bottom, struct scsi_dev_info_list,
 637                            dev_info_list);
 638
 639         if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
 640             devinfo_table->name)
 641                 seq_printf(m, "[%s]:\n", devinfo_table->name);
 642
 643         seq_printf(m, "'%.8s' '%.16s' 0x%llx\n",
 644                    devinfo->vendor, devinfo->model, devinfo->flags);
 645         return 0;
 646 }
 647
 648 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
 649 {
 650         struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
 651         loff_t pos = *ppos;
 652
 653         if (!dl)
 654                 return NULL;
 655
 656         list_for_each(dl->top, &scsi_dev_info_list) {
 657                 struct scsi_dev_info_list_table *devinfo_table =
 658                         list_entry(dl->top, struct scsi_dev_info_list_table,
 659                                    node);
 660                 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
 661                         if (pos-- == 0)
 662                                 return dl;
 663         }
 664
 665         kfree(dl);
 666         return NULL;
 667 }
 668
 669 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
 670 {
 671         struct double_list *dl = v;
 672         struct scsi_dev_info_list_table *devinfo_table =
 673                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 674
 675         ++*ppos;
 676         dl->bottom = dl->bottom->next;
 677         while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
 678                 dl->top = dl->top->next;
 679                 if (dl->top == &scsi_dev_info_list) {
 680                         kfree(dl);
 681                         return NULL;
 682                 }
 683                 devinfo_table = list_entry(dl->top,
 684                                            struct scsi_dev_info_list_table,
 685                                            node);
 686                 dl->bottom = devinfo_table->scsi_dev_info_list.next;
 687         }
 688
 689         return dl;
 690 }
 691
 692 static void devinfo_seq_stop(struct seq_file *m, void *v)
 693 {
 694         kfree(v);
 695 }
 696
 697 static const struct seq_operations scsi_devinfo_seq_ops = {
 698         .start  = devinfo_seq_start,
 699         .next   = devinfo_seq_next,
 700         .stop   = devinfo_seq_stop,
 701         .show   = devinfo_seq_show,
 702 };
 703
 704 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 705 {
 706         return seq_open(file, &scsi_devinfo_seq_ops);
 707 }
 708
 709 /*
 710  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 711  *
 712  * Description: Adds a black/white list entry for vendor and model with an
 713  * integer value of flag to the scsi device info list.
 714  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 715  */
 716 static ssize_t proc_scsi_devinfo_write(struct file *file,
 717                                        const char __user *buf,
 718                                        size_t length, loff_t *ppos)
 719 {
 720         char *buffer;
 721         ssize_t err = length;
 722
 723         if (!buf || length>PAGE_SIZE)
 724                 return -EINVAL;
 725         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 726                 return -ENOMEM;
 727         if (copy_from_user(buffer, buf, length)) {
 728                 err =-EFAULT;
 729                 goto out;
 730         }
 731
 732         if (length < PAGE_SIZE)
 733                 buffer[length] = '\0';
 734         else if (buffer[PAGE_SIZE-1]) {
 735                 err = -EINVAL;
 736                 goto out;
 737         }
 738
 739         scsi_dev_info_list_add_str(buffer);
 740
 741 out:
 742         free_page((unsigned long)buffer);
 743         return err;
 744 }
 745
 746 static const struct proc_ops scsi_devinfo_proc_ops = {
 747         .proc_open      = proc_scsi_devinfo_open,
 748         .proc_read      = seq_read,
 749         .proc_write     = proc_scsi_devinfo_write,
 750         .proc_lseek     = seq_lseek,
 751         .proc_release   = seq_release,
 752 };
 753 #endif /* CONFIG_SCSI_PROC_FS */
 754
 755 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 756 MODULE_PARM_DESC(dev_flags,
 757          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 758          " list entries for vendor and model with an integer value of flags"
 759          " to the scsi device info list");
 760
 761 module_param_named(default_dev_flags, scsi_default_dev_flags, ullong, 0644);
 762 MODULE_PARM_DESC(default_dev_flags,
 763                  "scsi default device flag uint64_t value");
 764
 765 /**
 766  * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 767  **/
 768 void scsi_exit_devinfo(void)
 769 {
 770 #ifdef CONFIG_SCSI_PROC_FS
 771         remove_proc_entry("scsi/device_info", NULL);
 772 #endif
 773
 774         scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 775 }
 776
 777 /**
 778  * scsi_dev_info_add_list - add a new devinfo list
 779  * @key:        key of the list to add
 780  * @name:       Name of the list to add (for /proc/scsi/device_info)
 781  *
 782  * Adds the requested list, returns zero on success, -EEXIST if the
 783  * key is already registered to a list, or other error on failure.
 784  */
 785 int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name)
 786 {
 787         struct scsi_dev_info_list_table *devinfo_table =
 788                 scsi_devinfo_lookup_by_key(key);
 789
 790         if (!IS_ERR(devinfo_table))
 791                 /* list already exists */
 792                 return -EEXIST;
 793
 794         devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 795
 796         if (!devinfo_table)
 797                 return -ENOMEM;
 798
 799         INIT_LIST_HEAD(&devinfo_table->node);
 800         INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 801         devinfo_table->name = name;
 802         devinfo_table->key = key;
 803         list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 804
 805         return 0;
 806 }
 807 EXPORT_SYMBOL(scsi_dev_info_add_list);
 808
 809 /**
 810  * scsi_dev_info_remove_list - destroy an added devinfo list
 811  * @key: key of the list to destroy
 812  *
 813  * Iterates over the entire list first, freeing all the values, then
 814  * frees the list itself.  Returns 0 on success or -EINVAL if the key
 815  * can't be found.
 816  */
 817 int scsi_dev_info_remove_list(enum scsi_devinfo_key key)
 818 {
 819         struct list_head *lh, *lh_next;
 820         struct scsi_dev_info_list_table *devinfo_table =
 821                 scsi_devinfo_lookup_by_key(key);
 822
 823         if (IS_ERR(devinfo_table))
 824                 /* no such list */
 825                 return -EINVAL;
 826
 827         /* remove from the master list */
 828         list_del(&devinfo_table->node);
 829
 830         list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 831                 struct scsi_dev_info_list *devinfo;
 832
 833                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 834                                      dev_info_list);
 835                 kfree(devinfo);
 836         }
 837         kfree(devinfo_table);
 838
 839         return 0;
 840 }
 841 EXPORT_SYMBOL(scsi_dev_info_remove_list);
 842
 843 /**
 844  * scsi_init_devinfo - set up the dynamic device list.
 845  *
 846  * Description:
 847  *      Add command line entries from scsi_dev_flags, then add
 848  *      scsi_static_device_list entries to the scsi device info list.
 849  */
 850 int __init scsi_init_devinfo(void)
 851 {
 852 #ifdef CONFIG_SCSI_PROC_FS
 853         struct proc_dir_entry *p;
 854 #endif
 855         int error, i;
 856
 857         error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 858         if (error)
 859                 return error;
 860
 861         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 862         if (error)
 863                 goto out;
 864
 865         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 866                 error = scsi_dev_info_list_add(1 /* compatibile */,
 867                                 scsi_static_device_list[i].vendor,
 868                                 scsi_static_device_list[i].model,
 869                                 NULL,
 870                                 scsi_static_device_list[i].flags);
 871                 if (error)
 872                         goto out;
 873         }
 874
 875 #ifdef CONFIG_SCSI_PROC_FS
 876         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_ops);
 877         if (!p) {
 878                 error = -ENOMEM;
 879                 goto out;
 880         }
 881 #endif /* CONFIG_SCSI_PROC_FS */
 882
 883  out:
 884         if (error)
 885                 scsi_exit_devinfo();
 886         return error;
 887 }