drivers/scsi/scsi_devinfo.c

   1
   2 #include <linux/blkdev.h>
   3 #include <linux/init.h>
   4 #include <linux/kernel.h>
   5 #include <linux/module.h>
   6 #include <linux/moduleparam.h>
   7 #include <linux/proc_fs.h>
   8 #include <linux/seq_file.h>
   9 #include <linux/slab.h>
  10
  11 #include <scsi/scsi_device.h>
  12 #include <scsi/scsi_devinfo.h>
  13
  14 #include "scsi_priv.h"
  15
  16
  17 /*
  18  * scsi_dev_info_list: structure to hold black/white listed devices.
  19  */
  20 struct scsi_dev_info_list {
  21         struct list_head dev_info_list;
  22         char vendor[8];
  23         char model[16];
  24         unsigned flags;
  25         unsigned compatible; /* for use with scsi_static_device_list entries */
  26 };
  27
  28 struct scsi_dev_info_list_table {
  29         struct list_head node;  /* our node for being on the master list */
  30         struct list_head scsi_dev_info_list; /* head of dev info list */
  31         const char *name;       /* name of list for /proc (NULL for global) */
  32         int key;                /* unique numeric identifier */
  33 };
  34
  35
  36 static const char spaces[] = "                "; /* 16 of them */
  37 static unsigned scsi_default_dev_flags;
  38 static LIST_HEAD(scsi_dev_info_list);
  39 static char scsi_dev_flags[256];
  40
  41 /*
  42  * scsi_static_device_list: deprecated list of devices that require
  43  * settings that differ from the default, includes black-listed (broken)
  44  * devices. The entries here are added to the tail of scsi_dev_info_list
  45  * via scsi_dev_info_list_init.
  46  *
  47  * Do not add to this list, use the command line or proc interface to add
  48  * to the scsi_dev_info_list. This table will eventually go away.
  49  */
  50 static struct {
  51         char *vendor;
  52         char *model;
  53         char *revision; /* revision known to be bad, unused */
  54         unsigned flags;
  55 } scsi_static_device_list[] __initdata = {
  56         /*
  57          * The following devices are known not to tolerate a lun != 0 scan
  58          * for one reason or another. Some will respond to all luns,
  59          * others will lock up.
  60          */
  61         {"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN},     /* locks up */
  62         {"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN},       /* locks up */
  63         {"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN},       /* locks up */
  64         {"DENON", "DRD-25X", "V", BLIST_NOLUN},                 /* locks up */
  65         {"HITACHI", "DK312C", "CM81", BLIST_NOLUN},     /* responds to all lun */
  66         {"HITACHI", "DK314C", "CR21", BLIST_NOLUN},     /* responds to all lun */
  67         {"IBM", "2104-DU3", NULL, BLIST_NOLUN},         /* locks up */
  68         {"IBM", "2104-TU3", NULL, BLIST_NOLUN},         /* locks up */
  69         {"IMS", "CDD521/10", "2.06", BLIST_NOLUN},      /* locks up */
  70         {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN},     /* locks up */
  71         {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN},     /* locks up */
  72         {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN},   /* locks up */
  73         {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN},     /* locks up */
  74         {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN},     /* locks up */
  75         {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN},    /* responds to all lun */
  76         {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN},      /* responds to all lun */
  77         {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
  78         {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN},    /* responds to all lun */
  79         {"RODIME", "RO3000S", "2.33", BLIST_NOLUN},     /* locks up */
  80         {"SUN", "SENA", NULL, BLIST_NOLUN},             /* responds to all luns */
  81         /*
  82          * The following causes a failed REQUEST SENSE on lun 1 for
  83          * aha152x controller, which causes SCSI code to reset bus.
  84          */
  85         {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
  86         /*
  87          * The following causes a failed REQUEST SENSE on lun 1 for
  88          * aha152x controller, which causes SCSI code to reset bus.
  89          */
  90         {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
  91         {"SEAGATE", "ST296", "921", BLIST_NOLUN},       /* responds to all lun */
  92         {"SEAGATE", "ST1581", "6538", BLIST_NOLUN},     /* responds to all lun */
  93         {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
  94         {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
  95         {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
  96         {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
  97         {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
  98         {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN},   /* locks up */
  99         {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN},       /* locks up */
 100         /*
 101          * The following causes a failed REQUEST SENSE on lun 1 for
 102          * seagate controller, which causes SCSI code to reset bus.
 103          */
 104         {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
 105         {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN},        /* responds to all lun */
 106         /*
 107          * The following causes a failed REQUEST SENSE on lun 1 for
 108          * seagate controller, which causes SCSI code to reset bus.
 109          */
 110         {"HP", "C1750A", "3226", BLIST_NOLUN},          /* scanjet iic */
 111         {"HP", "C1790A", "", BLIST_NOLUN},              /* scanjet iip */
 112         {"HP", "C2500A", "", BLIST_NOLUN},              /* scanjet iicx */
 113         {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
 114         {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN},      /* responds to all lun */
 115         {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN},     /* locks up */
 116         {"NEC", "D3856", "0009", BLIST_NOLUN},
 117         {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN},    /* locks up */
 118         {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN},    /* locks up */
 119         {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN},    /* locks up */
 120         {"RELISYS", "Scorpio", NULL, BLIST_NOLUN},      /* responds to all lun */
 121         {"SANKYO", "CP525", "6.64", BLIST_NOLUN},       /* causes failed REQ SENSE, extra reset */
 122         {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
 123         {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
 124         {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN},      /* locks up */
 125         {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN},      /* locks up */
 126         {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN},     /* locks up */
 127         {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN},    /* locks up */
 128         {"", "Scanner", "1.80", BLIST_NOLUN},   /* responds to all lun */
 129
 130         /*
 131          * Other types of devices that have special flags.
 132          * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
 133          */
 134         {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
 135         {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
 136         {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
 137         {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
 138         {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_FORCELUN | BLIST_INQUIRY_36},
 139         {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
 140         {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
 141         {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
 142         {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
 143         {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
 144         {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
 145         {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
 146         {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
 147                 BLIST_MAX_512 | BLIST_REPORTLUN2},      /* Compaq RA4x00 */
 148         {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
 149         {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
 150         {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 151         {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
 152         {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 153         {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
 154         {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 155         {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
 156         {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
 157         {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
 158         {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
 159         {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
 160         {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
 161         {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
 162         {"EMC",  "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 163         {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
 164         {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
 165         {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
 166         {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
 167         {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
 168         {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 169         {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
 170         {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
 171         {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
 172         {"HITACHI", "DF400", "*", BLIST_REPORTLUN2},
 173         {"HITACHI", "DF500", "*", BLIST_REPORTLUN2},
 174         {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
 175         {"HITACHI", "HUS1530", "*", BLIST_NO_DIF},
 176         {"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2},
 177         {"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 178         {"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 179         {"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 180         {"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 181         {"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 182         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
 183         {"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
 184         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
 185         {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
 186         {"HP", "C1557A", NULL, BLIST_FORCELUN},
 187         {"HP", "C3323-300", "4269", BLIST_NOTQ},
 188         {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
 189         {"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 190         {"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 191         {"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 192         {"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 193         {"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 194         {"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 195         {"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 196         {"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 197         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
 198         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 199         {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
 200         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
 201         {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
 202         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
 203         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
 204         {"INSITE", "I325VM", NULL, BLIST_KEY},
 205         {"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
 206         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 207         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
 208         {"Marvell", "Console", NULL, BLIST_SKIP_VPD_PAGES},
 209         {"Marvell", "91xx Config", "1.01", BLIST_SKIP_VPD_PAGES},
 210         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 211         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 212         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
 213         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
 214         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
 215         {"MICROP", "4110", NULL, BLIST_NOTQ},
 216         {"MSFT", "Virtual HD", NULL, BLIST_NO_RSOC},
 217         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
 218         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
 219         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 220         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 221         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 222         {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
 223         {"NETAPP", "LUN C-Mode", NULL, BLIST_SYNC_ALUA},
 224         {"NETAPP", "INF-01-00", NULL, BLIST_SYNC_ALUA},
 225         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 226         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 227         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 228         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 229         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 230         {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
 231         {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
 232         {"Promise", "", NULL, BLIST_SPARSELUN},
 233         {"QEMU", "QEMU CD-ROM", NULL, BLIST_SKIP_VPD_PAGES},
 234         {"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
 235         {"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
 236         {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
 237         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
 238         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 239         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
 240         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
 241         {"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
 242         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
 243         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
 244         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
 245         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 246         {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 247         {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 248         {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
 249         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
 250         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
 251         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
 252         {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
 253         {"SUN", "T300", "*", BLIST_SPARSELUN},
 254         {"SUN", "T4", "*", BLIST_SPARSELUN},
 255         {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
 256         {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
 257         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
 258         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
 259         {"Traxdata", "CDR4120", NULL, BLIST_NOLUN},     /* locks up */
 260         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
 261         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
 262         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
 263         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
 264         {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
 265         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
 266         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
 267         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
 268         { NULL, NULL, NULL, 0 },
 269 };
 270
 271 static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
 272 {
 273         struct scsi_dev_info_list_table *devinfo_table;
 274         int found = 0;
 275
 276         list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
 277                 if (devinfo_table->key == key) {
 278                         found = 1;
 279                         break;
 280                 }
 281         if (!found)
 282                 return ERR_PTR(-EINVAL);
 283
 284         return devinfo_table;
 285 }
 286
 287 /*
 288  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
 289  * devinfo vendor and model strings.
 290  */
 291 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 292                                 char *from, int compatible)
 293 {
 294         size_t from_length;
 295
 296         from_length = strlen(from);
 297         strncpy(to, from, min(to_length, from_length));
 298         if (from_length < to_length) {
 299                 if (compatible) {
 300                         /*
 301                          * NUL terminate the string if it is short.
 302                          */
 303                         to[from_length] = '\0';
 304                 } else {
 305                         /*
 306                          * space pad the string if it is short.
 307                          */
 308                         strncpy(&to[from_length], spaces,
 309                                 to_length - from_length);
 310                 }
 311         }
 312         if (from_length > to_length)
 313                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
 314                         __func__, name, from);
 315 }
 316
 317 /**
 318  * scsi_dev_info_list_add - add one dev_info list entry.
 319  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 320  * @vendor:     vendor string
 321  * @model:      model (product) string
 322  * @strflags:   integer string
 323  * @flags:      if strflags NULL, use this flag value
 324  *
 325  * Description:
 326  *      Create and add one dev_info entry for @vendor, @model, @strflags or
 327  *      @flag. If @compatible, add to the tail of the list, do not space
 328  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
 329  *      are added with @compatible 1 and @clfags NULL.
 330  *
 331  * Returns: 0 OK, -error on failure.
 332  **/
 333 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
 334                             char *strflags, int flags)
 335 {
 336         return scsi_dev_info_list_add_keyed(compatible, vendor, model,
 337                                             strflags, flags,
 338                                             SCSI_DEVINFO_GLOBAL);
 339 }
 340
 341 /**
 342  * scsi_dev_info_list_add_keyed - add one dev_info list entry.
 343  * @compatible: if true, null terminate short strings.  Otherwise space pad.
 344  * @vendor:     vendor string
 345  * @model:      model (product) string
 346  * @strflags:   integer string
 347  * @flags:      if strflags NULL, use this flag value
 348  * @key:        specify list to use
 349  *
 350  * Description:
 351  *      Create and add one dev_info entry for @vendor, @model,
 352  *      @strflags or @flag in list specified by @key. If @compatible,
 353  *      add to the tail of the list, do not space pad, and set
 354  *      devinfo->compatible. The scsi_static_device_list entries are
 355  *      added with @compatible 1 and @clfags NULL.
 356  *
 357  * Returns: 0 OK, -error on failure.
 358  **/
 359 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
 360                                  char *strflags, int flags, int key)
 361 {
 362         struct scsi_dev_info_list *devinfo;
 363         struct scsi_dev_info_list_table *devinfo_table =
 364                 scsi_devinfo_lookup_by_key(key);
 365
 366         if (IS_ERR(devinfo_table))
 367                 return PTR_ERR(devinfo_table);
 368
 369         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
 370         if (!devinfo) {
 371                 printk(KERN_ERR "%s: no memory\n", __func__);
 372                 return -ENOMEM;
 373         }
 374
 375         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
 376                             vendor, compatible);
 377         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
 378                             model, compatible);
 379
 380         if (strflags)
 381                 devinfo->flags = simple_strtoul(strflags, NULL, 0);
 382         else
 383                 devinfo->flags = flags;
 384
 385         devinfo->compatible = compatible;
 386
 387         if (compatible)
 388                 list_add_tail(&devinfo->dev_info_list,
 389                               &devinfo_table->scsi_dev_info_list);
 390         else
 391                 list_add(&devinfo->dev_info_list,
 392                          &devinfo_table->scsi_dev_info_list);
 393
 394         return 0;
 395 }
 396 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
 397
 398 /**
 399  * scsi_dev_info_list_find - find a matching dev_info list entry.
 400  * @vendor:     vendor string
 401  * @model:      model (product) string
 402  * @key:        specify list to use
 403  *
 404  * Description:
 405  *      Finds the first dev_info entry matching @vendor, @model
 406  *      in list specified by @key.
 407  *
 408  * Returns: pointer to matching entry, or ERR_PTR on failure.
 409  **/
 410 static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
 411                 const char *model, int key)
 412 {
 413         struct scsi_dev_info_list *devinfo;
 414         struct scsi_dev_info_list_table *devinfo_table =
 415                 scsi_devinfo_lookup_by_key(key);
 416         size_t vmax, mmax;
 417         const char *vskip, *mskip;
 418
 419         if (IS_ERR(devinfo_table))
 420                 return (struct scsi_dev_info_list *) devinfo_table;
 421
 422         /* Prepare for "compatible" matches */
 423
 424         /*
 425          * XXX why skip leading spaces? If an odd INQUIRY
 426          * value, that should have been part of the
 427          * scsi_static_device_list[] entry, such as "  FOO"
 428          * rather than "FOO". Since this code is already
 429          * here, and we don't know what device it is
 430          * trying to work with, leave it as-is.
 431          */
 432         vmax = sizeof(devinfo->vendor);
 433         vskip = vendor;
 434         while (vmax > 0 && *vskip == ' ') {
 435                 vmax--;
 436                 vskip++;
 437         }
 438         /* Also skip trailing spaces */
 439         while (vmax > 0 && vskip[vmax - 1] == ' ')
 440                 --vmax;
 441
 442         mmax = sizeof(devinfo->model);
 443         mskip = model;
 444         while (mmax > 0 && *mskip == ' ') {
 445                 mmax--;
 446                 mskip++;
 447         }
 448         while (mmax > 0 && mskip[mmax - 1] == ' ')
 449                 --mmax;
 450
 451         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
 452                             dev_info_list) {
 453                 if (devinfo->compatible) {
 454                         /*
 455                          * Behave like the older version of get_device_flags.
 456                          */
 457                         if (memcmp(devinfo->vendor, vskip, vmax) ||
 458                                         (vmax < sizeof(devinfo->vendor) &&
 459                                                 devinfo->vendor[vmax]))
 460                                 continue;
 461                         if (memcmp(devinfo->model, mskip, mmax) ||
 462                                         (mmax < sizeof(devinfo->model) &&
 463                                                 devinfo->model[mmax]))
 464                                 continue;
 465                         return devinfo;
 466                 } else {
 467                         if (!memcmp(devinfo->vendor, vendor,
 468                                      sizeof(devinfo->vendor)) &&
 469                              !memcmp(devinfo->model, model,
 470                                       sizeof(devinfo->model)))
 471                                 return devinfo;
 472                 }
 473         }
 474
 475         return ERR_PTR(-ENOENT);
 476 }
 477
 478 /**
 479  * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
 480  * @vendor:     vendor string
 481  * @model:      model (product) string
 482  * @key:        specify list to use
 483  *
 484  * Description:
 485  *      Remove and destroy one dev_info entry for @vendor, @model
 486  *      in list specified by @key.
 487  *
 488  * Returns: 0 OK, -error on failure.
 489  **/
 490 int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key)
 491 {
 492         struct scsi_dev_info_list *found;
 493
 494         found = scsi_dev_info_list_find(vendor, model, key);
 495         if (IS_ERR(found))
 496                 return PTR_ERR(found);
 497
 498         list_del(&found->dev_info_list);
 499         kfree(found);
 500         return 0;
 501 }
 502 EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
 503
 504 /**
 505  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
 506  * @dev_list:   string of device flags to add
 507  *
 508  * Description:
 509  *      Parse dev_list, and add entries to the scsi_dev_info_list.
 510  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
 511  *      dev_list is modified via strsep. Can be called for command line
 512  *      addition, for proc or mabye a sysfs interface.
 513  *
 514  * Returns: 0 if OK, -error on failure.
 515  **/
 516 static int scsi_dev_info_list_add_str(char *dev_list)
 517 {
 518         char *vendor, *model, *strflags, *next;
 519         char *next_check;
 520         int res = 0;
 521
 522         next = dev_list;
 523         if (next && next[0] == '"') {
 524                 /*
 525                  * Ignore both the leading and trailing quote.
 526                  */
 527                 next++;
 528                 next_check = ",\"";
 529         } else {
 530                 next_check = ",";
 531         }
 532
 533         /*
 534          * For the leading and trailing '"' case, the for loop comes
 535          * through the last time with vendor[0] == '\0'.
 536          */
 537         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
 538              && (res == 0); vendor = strsep(&next, ":")) {
 539                 strflags = NULL;
 540                 model = strsep(&next, ":");
 541                 if (model)
 542                         strflags = strsep(&next, next_check);
 543                 if (!model || !strflags) {
 544                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
 545                                " '%s'\n", __func__, vendor, model,
 546                                strflags);
 547                         res = -EINVAL;
 548                 } else
 549                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
 550                                                      model, strflags, 0);
 551         }
 552         return res;
 553 }
 554
 555 /**
 556  * get_device_flags - get device specific flags from the dynamic device list.
 557  * @sdev:       &scsi_device to get flags for
 558  * @vendor:     vendor name
 559  * @model:      model name
 560  *
 561  * Description:
 562  *     Search the global scsi_dev_info_list (specified by list zero)
 563  *     for an entry matching @vendor and @model, if found, return the
 564  *     matching flags value, else return the host or global default
 565  *     settings.  Called during scan time.
 566  **/
 567 int scsi_get_device_flags(struct scsi_device *sdev,
 568                           const unsigned char *vendor,
 569                           const unsigned char *model)
 570 {
 571         return scsi_get_device_flags_keyed(sdev, vendor, model,
 572                                            SCSI_DEVINFO_GLOBAL);
 573 }
 574
 575
 576 /**
 577  * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
 578  * @sdev:       &scsi_device to get flags for
 579  * @vendor:     vendor name
 580  * @model:      model name
 581  * @key:        list to look up
 582  *
 583  * Description:
 584  *     Search the scsi_dev_info_list specified by @key for an entry
 585  *     matching @vendor and @model, if found, return the matching
 586  *     flags value, else return the host or global default settings.
 587  *     Called during scan time.
 588  **/
 589 int scsi_get_device_flags_keyed(struct scsi_device *sdev,
 590                                 const unsigned char *vendor,
 591                                 const unsigned char *model,
 592                                 int key)
 593 {
 594         struct scsi_dev_info_list *devinfo;
 595         int err;
 596
 597         devinfo = scsi_dev_info_list_find(vendor, model, key);
 598         if (!IS_ERR(devinfo))
 599                 return devinfo->flags;
 600
 601         err = PTR_ERR(devinfo);
 602         if (err != -ENOENT)
 603                 return err;
 604
 605         /* nothing found, return nothing */
 606         if (key != SCSI_DEVINFO_GLOBAL)
 607                 return 0;
 608
 609         /* except for the global list, where we have an exception */
 610         if (sdev->sdev_bflags)
 611                 return sdev->sdev_bflags;
 612
 613         return scsi_default_dev_flags;
 614 }
 615 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
 616
 617 #ifdef CONFIG_SCSI_PROC_FS
 618 struct double_list {
 619         struct list_head *top;
 620         struct list_head *bottom;
 621 };
 622
 623 static int devinfo_seq_show(struct seq_file *m, void *v)
 624 {
 625         struct double_list *dl = v;
 626         struct scsi_dev_info_list_table *devinfo_table =
 627                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 628         struct scsi_dev_info_list *devinfo =
 629                 list_entry(dl->bottom, struct scsi_dev_info_list,
 630                            dev_info_list);
 631
 632         if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
 633             devinfo_table->name)
 634                 seq_printf(m, "[%s]:\n", devinfo_table->name);
 635
 636         seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
 637                    devinfo->vendor, devinfo->model, devinfo->flags);
 638         return 0;
 639 }
 640
 641 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
 642 {
 643         struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
 644         loff_t pos = *ppos;
 645
 646         if (!dl)
 647                 return NULL;
 648
 649         list_for_each(dl->top, &scsi_dev_info_list) {
 650                 struct scsi_dev_info_list_table *devinfo_table =
 651                         list_entry(dl->top, struct scsi_dev_info_list_table,
 652                                    node);
 653                 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
 654                         if (pos-- == 0)
 655                                 return dl;
 656         }
 657
 658         kfree(dl);
 659         return NULL;
 660 }
 661
 662 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
 663 {
 664         struct double_list *dl = v;
 665         struct scsi_dev_info_list_table *devinfo_table =
 666                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
 667
 668         ++*ppos;
 669         dl->bottom = dl->bottom->next;
 670         while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
 671                 dl->top = dl->top->next;
 672                 if (dl->top == &scsi_dev_info_list) {
 673                         kfree(dl);
 674                         return NULL;
 675                 }
 676                 devinfo_table = list_entry(dl->top,
 677                                            struct scsi_dev_info_list_table,
 678                                            node);
 679                 dl->bottom = devinfo_table->scsi_dev_info_list.next;
 680         }
 681
 682         return dl;
 683 }
 684
 685 static void devinfo_seq_stop(struct seq_file *m, void *v)
 686 {
 687         kfree(v);
 688 }
 689
 690 static const struct seq_operations scsi_devinfo_seq_ops = {
 691         .start  = devinfo_seq_start,
 692         .next   = devinfo_seq_next,
 693         .stop   = devinfo_seq_stop,
 694         .show   = devinfo_seq_show,
 695 };
 696
 697 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
 698 {
 699         return seq_open(file, &scsi_devinfo_seq_ops);
 700 }
 701
 702 /*
 703  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
 704  *
 705  * Description: Adds a black/white list entry for vendor and model with an
 706  * integer value of flag to the scsi device info list.
 707  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
 708  */
 709 static ssize_t proc_scsi_devinfo_write(struct file *file,
 710                                        const char __user *buf,
 711                                        size_t length, loff_t *ppos)
 712 {
 713         char *buffer;
 714         ssize_t err = length;
 715
 716         if (!buf || length>PAGE_SIZE)
 717                 return -EINVAL;
 718         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
 719                 return -ENOMEM;
 720         if (copy_from_user(buffer, buf, length)) {
 721                 err =-EFAULT;
 722                 goto out;
 723         }
 724
 725         if (length < PAGE_SIZE)
 726                 buffer[length] = '\0';
 727         else if (buffer[PAGE_SIZE-1]) {
 728                 err = -EINVAL;
 729                 goto out;
 730         }
 731
 732         scsi_dev_info_list_add_str(buffer);
 733
 734 out:
 735         free_page((unsigned long)buffer);
 736         return err;
 737 }
 738
 739 static const struct file_operations scsi_devinfo_proc_fops = {
 740         .owner          = THIS_MODULE,
 741         .open           = proc_scsi_devinfo_open,
 742         .read           = seq_read,
 743         .write          = proc_scsi_devinfo_write,
 744         .llseek         = seq_lseek,
 745         .release        = seq_release,
 746 };
 747 #endif /* CONFIG_SCSI_PROC_FS */
 748
 749 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
 750 MODULE_PARM_DESC(dev_flags,
 751          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
 752          " list entries for vendor and model with an integer value of flags"
 753          " to the scsi device info list");
 754
 755 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
 756 MODULE_PARM_DESC(default_dev_flags,
 757                  "scsi default device flag integer value");
 758
 759 /**
 760  * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
 761  **/
 762 void scsi_exit_devinfo(void)
 763 {
 764 #ifdef CONFIG_SCSI_PROC_FS
 765         remove_proc_entry("scsi/device_info", NULL);
 766 #endif
 767
 768         scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
 769 }
 770
 771 /**
 772  * scsi_dev_info_add_list - add a new devinfo list
 773  * @key:        key of the list to add
 774  * @name:       Name of the list to add (for /proc/scsi/device_info)
 775  *
 776  * Adds the requested list, returns zero on success, -EEXIST if the
 777  * key is already registered to a list, or other error on failure.
 778  */
 779 int scsi_dev_info_add_list(int key, const char *name)
 780 {
 781         struct scsi_dev_info_list_table *devinfo_table =
 782                 scsi_devinfo_lookup_by_key(key);
 783
 784         if (!IS_ERR(devinfo_table))
 785                 /* list already exists */
 786                 return -EEXIST;
 787
 788         devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
 789
 790         if (!devinfo_table)
 791                 return -ENOMEM;
 792
 793         INIT_LIST_HEAD(&devinfo_table->node);
 794         INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
 795         devinfo_table->name = name;
 796         devinfo_table->key = key;
 797         list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
 798
 799         return 0;
 800 }
 801 EXPORT_SYMBOL(scsi_dev_info_add_list);
 802
 803 /**
 804  * scsi_dev_info_remove_list - destroy an added devinfo list
 805  * @key: key of the list to destroy
 806  *
 807  * Iterates over the entire list first, freeing all the values, then
 808  * frees the list itself.  Returns 0 on success or -EINVAL if the key
 809  * can't be found.
 810  */
 811 int scsi_dev_info_remove_list(int key)
 812 {
 813         struct list_head *lh, *lh_next;
 814         struct scsi_dev_info_list_table *devinfo_table =
 815                 scsi_devinfo_lookup_by_key(key);
 816
 817         if (IS_ERR(devinfo_table))
 818                 /* no such list */
 819                 return -EINVAL;
 820
 821         /* remove from the master list */
 822         list_del(&devinfo_table->node);
 823
 824         list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
 825                 struct scsi_dev_info_list *devinfo;
 826
 827                 devinfo = list_entry(lh, struct scsi_dev_info_list,
 828                                      dev_info_list);
 829                 kfree(devinfo);
 830         }
 831         kfree(devinfo_table);
 832
 833         return 0;
 834 }
 835 EXPORT_SYMBOL(scsi_dev_info_remove_list);
 836
 837 /**
 838  * scsi_init_devinfo - set up the dynamic device list.
 839  *
 840  * Description:
 841  *      Add command line entries from scsi_dev_flags, then add
 842  *      scsi_static_device_list entries to the scsi device info list.
 843  */
 844 int __init scsi_init_devinfo(void)
 845 {
 846 #ifdef CONFIG_SCSI_PROC_FS
 847         struct proc_dir_entry *p;
 848 #endif
 849         int error, i;
 850
 851         error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
 852         if (error)
 853                 return error;
 854
 855         error = scsi_dev_info_list_add_str(scsi_dev_flags);
 856         if (error)
 857                 goto out;
 858
 859         for (i = 0; scsi_static_device_list[i].vendor; i++) {
 860                 error = scsi_dev_info_list_add(1 /* compatibile */,
 861                                 scsi_static_device_list[i].vendor,
 862                                 scsi_static_device_list[i].model,
 863                                 NULL,
 864                                 scsi_static_device_list[i].flags);
 865                 if (error)
 866                         goto out;
 867         }
 868
 869 #ifdef CONFIG_SCSI_PROC_FS
 870         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
 871         if (!p) {
 872                 error = -ENOMEM;
 873                 goto out;
 874         }
 875 #endif /* CONFIG_SCSI_PROC_FS */
 876
 877  out:
 878         if (error)
 879                 scsi_exit_devinfo();
 880         return error;
 881 }