drivers/scsi/scsi_sysfs.c

   1 /*
   2  * scsi_sysfs.c
   3  *
   4  * SCSI sysfs interface routines.
   5  *
   6  * Created to pull SCSI mid layer sysfs routines into one file.
   7  */
   8
   9 #include <linux/module.h>
  10 #include <linux/slab.h>
  11 #include <linux/init.h>
  12 #include <linux/blkdev.h>
  13 #include <linux/device.h>
  14 #include <linux/pm_runtime.h>
  15
  16 #include <scsi/scsi.h>
  17 #include <scsi/scsi_device.h>
  18 #include <scsi/scsi_host.h>
  19 #include <scsi/scsi_tcq.h>
  20 #include <scsi/scsi_transport.h>
  21 #include <scsi/scsi_driver.h>
  22
  23 #include "scsi_priv.h"
  24 #include "scsi_logging.h"
  25
  26 static struct device_type scsi_dev_type;
  27
  28 static const struct {
  29         enum scsi_device_state  value;
  30         char                    *name;
  31 } sdev_states[] = {
  32         { SDEV_CREATED, "created" },
  33         { SDEV_RUNNING, "running" },
  34         { SDEV_CANCEL, "cancel" },
  35         { SDEV_DEL, "deleted" },
  36         { SDEV_QUIESCE, "quiesce" },
  37         { SDEV_OFFLINE, "offline" },
  38         { SDEV_TRANSPORT_OFFLINE, "transport-offline" },
  39         { SDEV_BLOCK,   "blocked" },
  40         { SDEV_CREATED_BLOCK, "created-blocked" },
  41 };
  42
  43 const char *scsi_device_state_name(enum scsi_device_state state)
  44 {
  45         int i;
  46         char *name = NULL;
  47
  48         for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
  49                 if (sdev_states[i].value == state) {
  50                         name = sdev_states[i].name;
  51                         break;
  52                 }
  53         }
  54         return name;
  55 }
  56
  57 static const struct {
  58         enum scsi_host_state    value;
  59         char                    *name;
  60 } shost_states[] = {
  61         { SHOST_CREATED, "created" },
  62         { SHOST_RUNNING, "running" },
  63         { SHOST_CANCEL, "cancel" },
  64         { SHOST_DEL, "deleted" },
  65         { SHOST_RECOVERY, "recovery" },
  66         { SHOST_CANCEL_RECOVERY, "cancel/recovery" },
  67         { SHOST_DEL_RECOVERY, "deleted/recovery", },
  68 };
  69 const char *scsi_host_state_name(enum scsi_host_state state)
  70 {
  71         int i;
  72         char *name = NULL;
  73
  74         for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
  75                 if (shost_states[i].value == state) {
  76                         name = shost_states[i].name;
  77                         break;
  78                 }
  79         }
  80         return name;
  81 }
  82
  83 static int check_set(unsigned long long *val, char *src)
  84 {
  85         char *last;
  86
  87         if (strncmp(src, "-", 20) == 0) {
  88                 *val = SCAN_WILD_CARD;
  89         } else {
  90                 /*
  91                  * Doesn't check for int overflow
  92                  */
  93                 *val = simple_strtoull(src, &last, 0);
  94                 if (*last != '\0')
  95                         return 1;
  96         }
  97         return 0;
  98 }
  99
 100 static int scsi_scan(struct Scsi_Host *shost, const char *str)
 101 {
 102         char s1[15], s2[15], s3[17], junk;
 103         unsigned long long channel, id, lun;
 104         int res;
 105
 106         res = sscanf(str, "%10s %10s %16s %c", s1, s2, s3, &junk);
 107         if (res != 3)
 108                 return -EINVAL;
 109         if (check_set(&channel, s1))
 110                 return -EINVAL;
 111         if (check_set(&id, s2))
 112                 return -EINVAL;
 113         if (check_set(&lun, s3))
 114                 return -EINVAL;
 115         if (shost->transportt->user_scan)
 116                 res = shost->transportt->user_scan(shost, channel, id, lun);
 117         else
 118                 res = scsi_scan_host_selected(shost, channel, id, lun, 1);
 119         return res;
 120 }
 121
 122 /*
 123  * shost_show_function: macro to create an attr function that can be used to
 124  * show a non-bit field.
 125  */
 126 #define shost_show_function(name, field, format_string)                 \
 127 static ssize_t                                                          \
 128 show_##name (struct device *dev, struct device_attribute *attr,         \
 129              char *buf)                                                 \
 130 {                                                                       \
 131         struct Scsi_Host *shost = class_to_shost(dev);                  \
 132         return snprintf (buf, 20, format_string, shost->field);         \
 133 }
 134
 135 /*
 136  * shost_rd_attr: macro to create a function and attribute variable for a
 137  * read only field.
 138  */
 139 #define shost_rd_attr2(name, field, format_string)                      \
 140         shost_show_function(name, field, format_string)                 \
 141 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
 142
 143 #define shost_rd_attr(field, format_string) \
 144 shost_rd_attr2(field, field, format_string)
 145
 146 /*
 147  * Create the actual show/store functions and data structures.
 148  */
 149
 150 static ssize_t
 151 store_scan(struct device *dev, struct device_attribute *attr,
 152            const char *buf, size_t count)
 153 {
 154         struct Scsi_Host *shost = class_to_shost(dev);
 155         int res;
 156
 157         res = scsi_scan(shost, buf);
 158         if (res == 0)
 159                 res = count;
 160         return res;
 161 };
 162 static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
 163
 164 static ssize_t
 165 store_shost_state(struct device *dev, struct device_attribute *attr,
 166                   const char *buf, size_t count)
 167 {
 168         int i;
 169         struct Scsi_Host *shost = class_to_shost(dev);
 170         enum scsi_host_state state = 0;
 171
 172         for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
 173                 const int len = strlen(shost_states[i].name);
 174                 if (strncmp(shost_states[i].name, buf, len) == 0 &&
 175                    buf[len] == '\n') {
 176                         state = shost_states[i].value;
 177                         break;
 178                 }
 179         }
 180         if (!state)
 181                 return -EINVAL;
 182
 183         if (scsi_host_set_state(shost, state))
 184                 return -EINVAL;
 185         return count;
 186 }
 187
 188 static ssize_t
 189 show_shost_state(struct device *dev, struct device_attribute *attr, char *buf)
 190 {
 191         struct Scsi_Host *shost = class_to_shost(dev);
 192         const char *name = scsi_host_state_name(shost->shost_state);
 193
 194         if (!name)
 195                 return -EINVAL;
 196
 197         return snprintf(buf, 20, "%s\n", name);
 198 }
 199
 200 /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */
 201 struct device_attribute dev_attr_hstate =
 202         __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state);
 203
 204 static ssize_t
 205 show_shost_mode(unsigned int mode, char *buf)
 206 {
 207         ssize_t len = 0;
 208
 209         if (mode & MODE_INITIATOR)
 210                 len = sprintf(buf, "%s", "Initiator");
 211
 212         if (mode & MODE_TARGET)
 213                 len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target");
 214
 215         len += sprintf(buf + len, "\n");
 216
 217         return len;
 218 }
 219
 220 static ssize_t
 221 show_shost_supported_mode(struct device *dev, struct device_attribute *attr,
 222                           char *buf)
 223 {
 224         struct Scsi_Host *shost = class_to_shost(dev);
 225         unsigned int supported_mode = shost->hostt->supported_mode;
 226
 227         if (supported_mode == MODE_UNKNOWN)
 228                 /* by default this should be initiator */
 229                 supported_mode = MODE_INITIATOR;
 230
 231         return show_shost_mode(supported_mode, buf);
 232 }
 233
 234 static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL);
 235
 236 static ssize_t
 237 show_shost_active_mode(struct device *dev,
 238                        struct device_attribute *attr, char *buf)
 239 {
 240         struct Scsi_Host *shost = class_to_shost(dev);
 241
 242         if (shost->active_mode == MODE_UNKNOWN)
 243                 return snprintf(buf, 20, "unknown\n");
 244         else
 245                 return show_shost_mode(shost->active_mode, buf);
 246 }
 247
 248 static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL);
 249
 250 static int check_reset_type(const char *str)
 251 {
 252         if (sysfs_streq(str, "adapter"))
 253                 return SCSI_ADAPTER_RESET;
 254         else if (sysfs_streq(str, "firmware"))
 255                 return SCSI_FIRMWARE_RESET;
 256         else
 257                 return 0;
 258 }
 259
 260 static ssize_t
 261 store_host_reset(struct device *dev, struct device_attribute *attr,
 262                 const char *buf, size_t count)
 263 {
 264         struct Scsi_Host *shost = class_to_shost(dev);
 265         struct scsi_host_template *sht = shost->hostt;
 266         int ret = -EINVAL;
 267         int type;
 268
 269         type = check_reset_type(buf);
 270         if (!type)
 271                 goto exit_store_host_reset;
 272
 273         if (sht->host_reset)
 274                 ret = sht->host_reset(shost, type);
 275
 276 exit_store_host_reset:
 277         if (ret == 0)
 278                 ret = count;
 279         return ret;
 280 }
 281
 282 static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset);
 283
 284 static ssize_t
 285 show_shost_eh_deadline(struct device *dev,
 286                       struct device_attribute *attr, char *buf)
 287 {
 288         struct Scsi_Host *shost = class_to_shost(dev);
 289
 290         if (shost->eh_deadline == -1)
 291                 return snprintf(buf, strlen("off") + 2, "off\n");
 292         return sprintf(buf, "%u\n", shost->eh_deadline / HZ);
 293 }
 294
 295 static ssize_t
 296 store_shost_eh_deadline(struct device *dev, struct device_attribute *attr,
 297                 const char *buf, size_t count)
 298 {
 299         struct Scsi_Host *shost = class_to_shost(dev);
 300         int ret = -EINVAL;
 301         unsigned long deadline, flags;
 302
 303         if (shost->transportt &&
 304             (shost->transportt->eh_strategy_handler ||
 305              !shost->hostt->eh_host_reset_handler))
 306                 return ret;
 307
 308         if (!strncmp(buf, "off", strlen("off")))
 309                 deadline = -1;
 310         else {
 311                 ret = kstrtoul(buf, 10, &deadline);
 312                 if (ret)
 313                         return ret;
 314                 if (deadline * HZ > UINT_MAX)
 315                         return -EINVAL;
 316         }
 317
 318         spin_lock_irqsave(shost->host_lock, flags);
 319         if (scsi_host_in_recovery(shost))
 320                 ret = -EBUSY;
 321         else {
 322                 if (deadline == -1)
 323                         shost->eh_deadline = -1;
 324                 else
 325                         shost->eh_deadline = deadline * HZ;
 326
 327                 ret = count;
 328         }
 329         spin_unlock_irqrestore(shost->host_lock, flags);
 330
 331         return ret;
 332 }
 333
 334 static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline);
 335
 336 shost_rd_attr(use_blk_mq, "%d\n");
 337 shost_rd_attr(unique_id, "%u\n");
 338 shost_rd_attr(cmd_per_lun, "%hd\n");
 339 shost_rd_attr(can_queue, "%hd\n");
 340 shost_rd_attr(sg_tablesize, "%hu\n");
 341 shost_rd_attr(sg_prot_tablesize, "%hu\n");
 342 shost_rd_attr(unchecked_isa_dma, "%d\n");
 343 shost_rd_attr(prot_capabilities, "%u\n");
 344 shost_rd_attr(prot_guard_type, "%hd\n");
 345 shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
 346
 347 static ssize_t
 348 show_host_busy(struct device *dev, struct device_attribute *attr, char *buf)
 349 {
 350         struct Scsi_Host *shost = class_to_shost(dev);
 351         return snprintf(buf, 20, "%d\n", atomic_read(&shost->host_busy));
 352 }
 353 static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL);
 354
 355 static struct attribute *scsi_sysfs_shost_attrs[] = {
 356         &dev_attr_use_blk_mq.attr,
 357         &dev_attr_unique_id.attr,
 358         &dev_attr_host_busy.attr,
 359         &dev_attr_cmd_per_lun.attr,
 360         &dev_attr_can_queue.attr,
 361         &dev_attr_sg_tablesize.attr,
 362         &dev_attr_sg_prot_tablesize.attr,
 363         &dev_attr_unchecked_isa_dma.attr,
 364         &dev_attr_proc_name.attr,
 365         &dev_attr_scan.attr,
 366         &dev_attr_hstate.attr,
 367         &dev_attr_supported_mode.attr,
 368         &dev_attr_active_mode.attr,
 369         &dev_attr_prot_capabilities.attr,
 370         &dev_attr_prot_guard_type.attr,
 371         &dev_attr_host_reset.attr,
 372         &dev_attr_eh_deadline.attr,
 373         NULL
 374 };
 375
 376 struct attribute_group scsi_shost_attr_group = {
 377         .attrs =        scsi_sysfs_shost_attrs,
 378 };
 379
 380 const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
 381         &scsi_shost_attr_group,
 382         NULL
 383 };
 384
 385 static void scsi_device_cls_release(struct device *class_dev)
 386 {
 387         struct scsi_device *sdev;
 388
 389         sdev = class_to_sdev(class_dev);
 390         put_device(&sdev->sdev_gendev);
 391 }
 392
 393 static void scsi_device_dev_release_usercontext(struct work_struct *work)
 394 {
 395         struct scsi_device *sdev;
 396         struct device *parent;
 397         struct list_head *this, *tmp;
 398         unsigned long flags;
 399         struct module *mod;
 400
 401         sdev = container_of(work, struct scsi_device, ew.work);
 402
 403         mod = sdev->host->hostt->module;
 404
 405         scsi_dh_release_device(sdev);
 406
 407         parent = sdev->sdev_gendev.parent;
 408
 409         spin_lock_irqsave(sdev->host->host_lock, flags);
 410         list_del(&sdev->siblings);
 411         list_del(&sdev->same_target_siblings);
 412         list_del(&sdev->starved_entry);
 413         spin_unlock_irqrestore(sdev->host->host_lock, flags);
 414
 415         cancel_work_sync(&sdev->event_work);
 416
 417         list_for_each_safe(this, tmp, &sdev->event_list) {
 418                 struct scsi_event *evt;
 419
 420                 evt = list_entry(this, struct scsi_event, node);
 421                 list_del(&evt->node);
 422                 kfree(evt);
 423         }
 424
 425         blk_put_queue(sdev->request_queue);
 426         /* NULL queue means the device can't be used */
 427         sdev->request_queue = NULL;
 428
 429         kfree(sdev->vpd_pg83);
 430         kfree(sdev->vpd_pg80);
 431         kfree(sdev->inquiry);
 432         kfree(sdev);
 433
 434         if (parent)
 435                 put_device(parent);
 436         module_put(mod);
 437 }
 438
 439 static void scsi_device_dev_release(struct device *dev)
 440 {
 441         struct scsi_device *sdp = to_scsi_device(dev);
 442
 443         /* Set module pointer as NULL in case of module unloading */
 444         if (!try_module_get(sdp->host->hostt->module))
 445                 sdp->host->hostt->module = NULL;
 446
 447         execute_in_process_context(scsi_device_dev_release_usercontext,
 448                                    &sdp->ew);
 449 }
 450
 451 static struct class sdev_class = {
 452         .name           = "scsi_device",
 453         .dev_release    = scsi_device_cls_release,
 454 };
 455
 456 /* all probing is done in the individual ->probe routines */
 457 static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
 458 {
 459         struct scsi_device *sdp;
 460
 461         if (dev->type != &scsi_dev_type)
 462                 return 0;
 463
 464         sdp = to_scsi_device(dev);
 465         if (sdp->no_uld_attach)
 466                 return 0;
 467         return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
 468 }
 469
 470 static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 471 {
 472         struct scsi_device *sdev;
 473
 474         if (dev->type != &scsi_dev_type)
 475                 return 0;
 476
 477         sdev = to_scsi_device(dev);
 478
 479         add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
 480         return 0;
 481 }
 482
 483 struct bus_type scsi_bus_type = {
 484         .name           = "scsi",
 485         .match          = scsi_bus_match,
 486         .uevent         = scsi_bus_uevent,
 487 #ifdef CONFIG_PM
 488         .pm             = &scsi_bus_pm_ops,
 489 #endif
 490 };
 491 EXPORT_SYMBOL_GPL(scsi_bus_type);
 492
 493 int scsi_sysfs_register(void)
 494 {
 495         int error;
 496
 497         error = bus_register(&scsi_bus_type);
 498         if (!error) {
 499                 error = class_register(&sdev_class);
 500                 if (error)
 501                         bus_unregister(&scsi_bus_type);
 502         }
 503
 504         return error;
 505 }
 506
 507 void scsi_sysfs_unregister(void)
 508 {
 509         class_unregister(&sdev_class);
 510         bus_unregister(&scsi_bus_type);
 511 }
 512
 513 /*
 514  * sdev_show_function: macro to create an attr function that can be used to
 515  * show a non-bit field.
 516  */
 517 #define sdev_show_function(field, format_string)                                \
 518 static ssize_t                                                          \
 519 sdev_show_##field (struct device *dev, struct device_attribute *attr,   \
 520                    char *buf)                                           \
 521 {                                                                       \
 522         struct scsi_device *sdev;                                       \
 523         sdev = to_scsi_device(dev);                                     \
 524         return snprintf (buf, 20, format_string, sdev->field);          \
 525 }                                                                       \
 526
 527 /*
 528  * sdev_rd_attr: macro to create a function and attribute variable for a
 529  * read only field.
 530  */
 531 #define sdev_rd_attr(field, format_string)                              \
 532         sdev_show_function(field, format_string)                        \
 533 static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
 534
 535
 536 /*
 537  * sdev_rw_attr: create a function and attribute variable for a
 538  * read/write field.
 539  */
 540 #define sdev_rw_attr(field, format_string)                              \
 541         sdev_show_function(field, format_string)                                \
 542                                                                         \
 543 static ssize_t                                                          \
 544 sdev_store_##field (struct device *dev, struct device_attribute *attr,  \
 545                     const char *buf, size_t count)                      \
 546 {                                                                       \
 547         struct scsi_device *sdev;                                       \
 548         sdev = to_scsi_device(dev);                                     \
 549         sscanf (buf, format_string, &sdev->field);                      \
 550         return count;                                                   \
 551 }                                                                       \
 552 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
 553
 554 /* Currently we don't export bit fields, but we might in future,
 555  * so leave this code in */
 556 #if 0
 557 /*
 558  * sdev_rd_attr: create a function and attribute variable for a
 559  * read/write bit field.
 560  */
 561 #define sdev_rw_attr_bit(field)                                         \
 562         sdev_show_function(field, "%d\n")                                       \
 563                                                                         \
 564 static ssize_t                                                          \
 565 sdev_store_##field (struct device *dev, struct device_attribute *attr,  \
 566                     const char *buf, size_t count)                      \
 567 {                                                                       \
 568         int ret;                                                        \
 569         struct scsi_device *sdev;                                       \
 570         ret = scsi_sdev_check_buf_bit(buf);                             \
 571         if (ret >= 0)   {                                               \
 572                 sdev = to_scsi_device(dev);                             \
 573                 sdev->field = ret;                                      \
 574                 ret = count;                                            \
 575         }                                                               \
 576         return ret;                                                     \
 577 }                                                                       \
 578 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
 579
 580 /*
 581  * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
 582  * else return -EINVAL.
 583  */
 584 static int scsi_sdev_check_buf_bit(const char *buf)
 585 {
 586         if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
 587                 if (buf[0] == '1')
 588                         return 1;
 589                 else if (buf[0] == '0')
 590                         return 0;
 591                 else
 592                         return -EINVAL;
 593         } else
 594                 return -EINVAL;
 595 }
 596 #endif
 597 /*
 598  * Create the actual show/store functions and data structures.
 599  */
 600 sdev_rd_attr (type, "%d\n");
 601 sdev_rd_attr (scsi_level, "%d\n");
 602 sdev_rd_attr (vendor, "%.8s\n");
 603 sdev_rd_attr (model, "%.16s\n");
 604 sdev_rd_attr (rev, "%.4s\n");
 605
 606 static ssize_t
 607 sdev_show_device_busy(struct device *dev, struct device_attribute *attr,
 608                 char *buf)
 609 {
 610         struct scsi_device *sdev = to_scsi_device(dev);
 611         return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_busy));
 612 }
 613 static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL);
 614
 615 static ssize_t
 616 sdev_show_device_blocked(struct device *dev, struct device_attribute *attr,
 617                 char *buf)
 618 {
 619         struct scsi_device *sdev = to_scsi_device(dev);
 620         return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked));
 621 }
 622 static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL);
 623
 624 /*
 625  * TODO: can we make these symlinks to the block layer ones?
 626  */
 627 static ssize_t
 628 sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
 629 {
 630         struct scsi_device *sdev;
 631         sdev = to_scsi_device(dev);
 632         return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
 633 }
 634
 635 static ssize_t
 636 sdev_store_timeout (struct device *dev, struct device_attribute *attr,
 637                     const char *buf, size_t count)
 638 {
 639         struct scsi_device *sdev;
 640         int timeout;
 641         sdev = to_scsi_device(dev);
 642         sscanf (buf, "%d\n", &timeout);
 643         blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
 644         return count;
 645 }
 646 static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
 647
 648 static ssize_t
 649 sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf)
 650 {
 651         struct scsi_device *sdev;
 652         sdev = to_scsi_device(dev);
 653         return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ);
 654 }
 655
 656 static ssize_t
 657 sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr,
 658                     const char *buf, size_t count)
 659 {
 660         struct scsi_device *sdev;
 661         unsigned int eh_timeout;
 662         int err;
 663
 664         if (!capable(CAP_SYS_ADMIN))
 665                 return -EACCES;
 666
 667         sdev = to_scsi_device(dev);
 668         err = kstrtouint(buf, 10, &eh_timeout);
 669         if (err)
 670                 return err;
 671         sdev->eh_timeout = eh_timeout * HZ;
 672
 673         return count;
 674 }
 675 static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout);
 676
 677 static ssize_t
 678 store_rescan_field (struct device *dev, struct device_attribute *attr,
 679                     const char *buf, size_t count)
 680 {
 681         scsi_rescan_device(dev);
 682         return count;
 683 }
 684 static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
 685
 686 static ssize_t
 687 sdev_store_delete(struct device *dev, struct device_attribute *attr,
 688                   const char *buf, size_t count)
 689 {
 690         struct kernfs_node *kn;
 691         struct scsi_device *sdev = to_scsi_device(dev);
 692
 693         /*
 694          * We need to try to get module, avoiding the module been removed
 695          * during delete.
 696          */
 697         if (scsi_device_get(sdev))
 698                 return -ENODEV;
 699
 700         kn = sysfs_break_active_protection(&dev->kobj, &attr->attr);
 701         WARN_ON_ONCE(!kn);
 702         /*
 703          * Concurrent writes into the "delete" sysfs attribute may trigger
 704          * concurrent calls to device_remove_file() and scsi_remove_device().
 705          * device_remove_file() handles concurrent removal calls by
 706          * serializing these and by ignoring the second and later removal
 707          * attempts.  Concurrent calls of scsi_remove_device() are
 708          * serialized. The second and later calls of scsi_remove_device() are
 709          * ignored because the first call of that function changes the device
 710          * state into SDEV_DEL.
 711          */
 712         device_remove_file(dev, attr);
 713         scsi_remove_device(sdev);
 714         if (kn)
 715                 sysfs_unbreak_active_protection(kn);
 716         scsi_device_put(sdev);
 717         return count;
 718 };
 719 static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
 720
 721 static ssize_t
 722 store_state_field(struct device *dev, struct device_attribute *attr,
 723                   const char *buf, size_t count)
 724 {
 725         int i;
 726         struct scsi_device *sdev = to_scsi_device(dev);
 727         enum scsi_device_state state = 0;
 728
 729         for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
 730                 const int len = strlen(sdev_states[i].name);
 731                 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
 732                    buf[len] == '\n') {
 733                         state = sdev_states[i].value;
 734                         break;
 735                 }
 736         }
 737         if (!state)
 738                 return -EINVAL;
 739
 740         if (scsi_device_set_state(sdev, state))
 741                 return -EINVAL;
 742         return count;
 743 }
 744
 745 static ssize_t
 746 show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
 747 {
 748         struct scsi_device *sdev = to_scsi_device(dev);
 749         const char *name = scsi_device_state_name(sdev->sdev_state);
 750
 751         if (!name)
 752                 return -EINVAL;
 753
 754         return snprintf(buf, 20, "%s\n", name);
 755 }
 756
 757 static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
 758
 759 static ssize_t
 760 show_queue_type_field(struct device *dev, struct device_attribute *attr,
 761                       char *buf)
 762 {
 763         struct scsi_device *sdev = to_scsi_device(dev);
 764         const char *name = "none";
 765
 766         if (sdev->simple_tags)
 767                 name = "simple";
 768
 769         return snprintf(buf, 20, "%s\n", name);
 770 }
 771
 772 static ssize_t
 773 store_queue_type_field(struct device *dev, struct device_attribute *attr,
 774                        const char *buf, size_t count)
 775 {
 776         struct scsi_device *sdev = to_scsi_device(dev);
 777
 778         if (!sdev->tagged_supported)
 779                 return -EINVAL;
 780
 781         sdev_printk(KERN_INFO, sdev,
 782                     "ignoring write to deprecated queue_type attribute");
 783         return count;
 784 }
 785
 786 static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
 787                    store_queue_type_field);
 788
 789 #define sdev_vpd_pg_attr(_page)                                         \
 790 static ssize_t                                                  \
 791 show_vpd_##_page(struct file *filp, struct kobject *kobj,       \
 792                  struct bin_attribute *bin_attr,                        \
 793                  char *buf, loff_t off, size_t count)                   \
 794 {                                                                       \
 795         struct device *dev = container_of(kobj, struct device, kobj);   \
 796         struct scsi_device *sdev = to_scsi_device(dev);                 \
 797         if (!sdev->vpd_##_page)                                         \
 798                 return -EINVAL;                                         \
 799         return memory_read_from_buffer(buf, count, &off,                \
 800                                        sdev->vpd_##_page,               \
 801                                        sdev->vpd_##_page##_len);        \
 802 }                                                                       \
 803 static struct bin_attribute dev_attr_vpd_##_page = {            \
 804         .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO },   \
 805         .size = 0,                                                      \
 806         .read = show_vpd_##_page,                                       \
 807 };
 808
 809 sdev_vpd_pg_attr(pg83);
 810 sdev_vpd_pg_attr(pg80);
 811
 812 static ssize_t show_inquiry(struct file *filep, struct kobject *kobj,
 813                             struct bin_attribute *bin_attr,
 814                             char *buf, loff_t off, size_t count)
 815 {
 816         struct device *dev = container_of(kobj, struct device, kobj);
 817         struct scsi_device *sdev = to_scsi_device(dev);
 818
 819         if (!sdev->inquiry)
 820                 return -EINVAL;
 821
 822         return memory_read_from_buffer(buf, count, &off, sdev->inquiry,
 823                                        sdev->inquiry_len);
 824 }
 825
 826 static struct bin_attribute dev_attr_inquiry = {
 827         .attr = {
 828                 .name = "inquiry",
 829                 .mode = S_IRUGO,
 830         },
 831         .size = 0,
 832         .read = show_inquiry,
 833 };
 834
 835 static ssize_t
 836 show_iostat_counterbits(struct device *dev, struct device_attribute *attr,
 837                         char *buf)
 838 {
 839         return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
 840 }
 841
 842 static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
 843
 844 #define show_sdev_iostat(field)                                         \
 845 static ssize_t                                                          \
 846 show_iostat_##field(struct device *dev, struct device_attribute *attr,  \
 847                     char *buf)                                          \
 848 {                                                                       \
 849         struct scsi_device *sdev = to_scsi_device(dev);                 \
 850         unsigned long long count = atomic_read(&sdev->field);           \
 851         return snprintf(buf, 20, "0x%llx\n", count);                    \
 852 }                                                                       \
 853 static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
 854
 855 show_sdev_iostat(iorequest_cnt);
 856 show_sdev_iostat(iodone_cnt);
 857 show_sdev_iostat(ioerr_cnt);
 858
 859 static ssize_t
 860 sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
 861 {
 862         struct scsi_device *sdev;
 863         sdev = to_scsi_device(dev);
 864         return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
 865 }
 866 static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
 867
 868 #define DECLARE_EVT_SHOW(name, Cap_name)                                \
 869 static ssize_t                                                          \
 870 sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
 871                      char *buf)                                         \
 872 {                                                                       \
 873         struct scsi_device *sdev = to_scsi_device(dev);                 \
 874         int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
 875         return snprintf(buf, 20, "%d\n", val);                          \
 876 }
 877
 878 #define DECLARE_EVT_STORE(name, Cap_name)                               \
 879 static ssize_t                                                          \
 880 sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
 881                       const char *buf, size_t count)                    \
 882 {                                                                       \
 883         struct scsi_device *sdev = to_scsi_device(dev);                 \
 884         int val = simple_strtoul(buf, NULL, 0);                         \
 885         if (val == 0)                                                   \
 886                 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
 887         else if (val == 1)                                              \
 888                 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events);   \
 889         else                                                            \
 890                 return -EINVAL;                                         \
 891         return count;                                                   \
 892 }
 893
 894 #define DECLARE_EVT(name, Cap_name)                                     \
 895         DECLARE_EVT_SHOW(name, Cap_name)                                \
 896         DECLARE_EVT_STORE(name, Cap_name)                               \
 897         static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name,   \
 898                            sdev_store_evt_##name);
 899 #define REF_EVT(name) &dev_attr_evt_##name.attr
 900
 901 DECLARE_EVT(media_change, MEDIA_CHANGE)
 902 DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED)
 903 DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED)
 904 DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED)
 905 DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED)
 906 DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED)
 907
 908 static ssize_t
 909 sdev_store_queue_depth(struct device *dev, struct device_attribute *attr,
 910                        const char *buf, size_t count)
 911 {
 912         int depth, retval;
 913         struct scsi_device *sdev = to_scsi_device(dev);
 914         struct scsi_host_template *sht = sdev->host->hostt;
 915
 916         if (!sht->change_queue_depth)
 917                 return -EINVAL;
 918
 919         depth = simple_strtoul(buf, NULL, 0);
 920
 921         if (depth < 1 || depth > sdev->host->can_queue)
 922                 return -EINVAL;
 923
 924         retval = sht->change_queue_depth(sdev, depth);
 925         if (retval < 0)
 926                 return retval;
 927
 928         sdev->max_queue_depth = sdev->queue_depth;
 929
 930         return count;
 931 }
 932 sdev_show_function(queue_depth, "%d\n");
 933
 934 static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
 935                    sdev_store_queue_depth);
 936
 937 static ssize_t
 938 sdev_show_queue_ramp_up_period(struct device *dev,
 939                                struct device_attribute *attr,
 940                                char *buf)
 941 {
 942         struct scsi_device *sdev;
 943         sdev = to_scsi_device(dev);
 944         return snprintf(buf, 20, "%u\n",
 945                         jiffies_to_msecs(sdev->queue_ramp_up_period));
 946 }
 947
 948 static ssize_t
 949 sdev_store_queue_ramp_up_period(struct device *dev,
 950                                 struct device_attribute *attr,
 951                                 const char *buf, size_t count)
 952 {
 953         struct scsi_device *sdev = to_scsi_device(dev);
 954         unsigned int period;
 955
 956         if (kstrtouint(buf, 10, &period))
 957                 return -EINVAL;
 958
 959         sdev->queue_ramp_up_period = msecs_to_jiffies(period);
 960         return count;
 961 }
 962
 963 static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
 964                    sdev_show_queue_ramp_up_period,
 965                    sdev_store_queue_ramp_up_period);
 966
 967 static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj,
 968                                          struct attribute *attr, int i)
 969 {
 970         struct device *dev = container_of(kobj, struct device, kobj);
 971         struct scsi_device *sdev = to_scsi_device(dev);
 972
 973
 974         if (attr == &dev_attr_queue_depth.attr &&
 975             !sdev->host->hostt->change_queue_depth)
 976                 return S_IRUGO;
 977
 978         if (attr == &dev_attr_queue_ramp_up_period.attr &&
 979             !sdev->host->hostt->change_queue_depth)
 980                 return 0;
 981
 982         return attr->mode;
 983 }
 984
 985 /* Default template for device attributes.  May NOT be modified */
 986 static struct attribute *scsi_sdev_attrs[] = {
 987         &dev_attr_device_blocked.attr,
 988         &dev_attr_type.attr,
 989         &dev_attr_scsi_level.attr,
 990         &dev_attr_device_busy.attr,
 991         &dev_attr_vendor.attr,
 992         &dev_attr_model.attr,
 993         &dev_attr_rev.attr,
 994         &dev_attr_rescan.attr,
 995         &dev_attr_delete.attr,
 996         &dev_attr_state.attr,
 997         &dev_attr_timeout.attr,
 998         &dev_attr_eh_timeout.attr,
 999         &dev_attr_iocounterbits.attr,
1000         &dev_attr_iorequest_cnt.attr,
1001         &dev_attr_iodone_cnt.attr,
1002         &dev_attr_ioerr_cnt.attr,
1003         &dev_attr_modalias.attr,
1004         &dev_attr_queue_depth.attr,
1005         &dev_attr_queue_type.attr,
1006         &dev_attr_queue_ramp_up_period.attr,
1007         REF_EVT(media_change),
1008         REF_EVT(inquiry_change_reported),
1009         REF_EVT(capacity_change_reported),
1010         REF_EVT(soft_threshold_reached),
1011         REF_EVT(mode_parameter_change_reported),
1012         REF_EVT(lun_change_reported),
1013         NULL
1014 };
1015
1016 static struct bin_attribute *scsi_sdev_bin_attrs[] = {
1017         &dev_attr_vpd_pg83,
1018         &dev_attr_vpd_pg80,
1019         &dev_attr_inquiry,
1020         NULL
1021 };
1022 static struct attribute_group scsi_sdev_attr_group = {
1023         .attrs =        scsi_sdev_attrs,
1024         .bin_attrs =    scsi_sdev_bin_attrs,
1025         .is_visible =   scsi_sdev_attr_is_visible,
1026 };
1027
1028 static const struct attribute_group *scsi_sdev_attr_groups[] = {
1029         &scsi_sdev_attr_group,
1030         NULL
1031 };
1032
1033 static int scsi_target_add(struct scsi_target *starget)
1034 {
1035         int error;
1036
1037         if (starget->state != STARGET_CREATED)
1038                 return 0;
1039
1040         error = device_add(&starget->dev);
1041         if (error) {
1042                 dev_err(&starget->dev, "target device_add failed, error %d\n", error);
1043                 return error;
1044         }
1045         transport_add_device(&starget->dev);
1046         starget->state = STARGET_RUNNING;
1047
1048         pm_runtime_set_active(&starget->dev);
1049         pm_runtime_enable(&starget->dev);
1050         device_enable_async_suspend(&starget->dev);
1051
1052         return 0;
1053 }
1054
1055 /**
1056  * scsi_sysfs_add_sdev - add scsi device to sysfs
1057  * @sdev:       scsi_device to add
1058  *
1059  * Return value:
1060  *      0 on Success / non-zero on Failure
1061  **/
1062 int scsi_sysfs_add_sdev(struct scsi_device *sdev)
1063 {
1064         int error, i;
1065         struct request_queue *rq = sdev->request_queue;
1066         struct scsi_target *starget = sdev->sdev_target;
1067
1068         error = scsi_target_add(starget);
1069         if (error)
1070                 return error;
1071
1072         transport_configure_device(&starget->dev);
1073
1074         device_enable_async_suspend(&sdev->sdev_gendev);
1075         scsi_autopm_get_target(starget);
1076         pm_runtime_set_active(&sdev->sdev_gendev);
1077         pm_runtime_forbid(&sdev->sdev_gendev);
1078         pm_runtime_enable(&sdev->sdev_gendev);
1079         scsi_autopm_put_target(starget);
1080
1081         scsi_autopm_get_device(sdev);
1082
1083         error = device_add(&sdev->sdev_gendev);
1084         if (error) {
1085                 sdev_printk(KERN_INFO, sdev,
1086                                 "failed to add device: %d\n", error);
1087                 return error;
1088         }
1089
1090         error = scsi_dh_add_device(sdev);
1091         if (error)
1092                 /*
1093                  * device_handler is optional, so any error can be ignored
1094                  */
1095                 sdev_printk(KERN_INFO, sdev,
1096                                 "failed to add device handler: %d\n", error);
1097
1098         device_enable_async_suspend(&sdev->sdev_dev);
1099         error = device_add(&sdev->sdev_dev);
1100         if (error) {
1101                 sdev_printk(KERN_INFO, sdev,
1102                                 "failed to add class device: %d\n", error);
1103                 scsi_dh_remove_device(sdev);
1104                 device_del(&sdev->sdev_gendev);
1105                 return error;
1106         }
1107         transport_add_device(&sdev->sdev_gendev);
1108         sdev->is_visible = 1;
1109
1110         error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
1111
1112         if (error)
1113                 /* we're treating error on bsg register as non-fatal,
1114                  * so pretend nothing went wrong */
1115                 sdev_printk(KERN_INFO, sdev,
1116                             "Failed to register bsg queue, errno=%d\n", error);
1117
1118         /* add additional host specific attributes */
1119         if (sdev->host->hostt->sdev_attrs) {
1120                 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
1121                         error = device_create_file(&sdev->sdev_gendev,
1122                                         sdev->host->hostt->sdev_attrs[i]);
1123                         if (error)
1124                                 return error;
1125                 }
1126         }
1127
1128         scsi_autopm_put_device(sdev);
1129         return error;
1130 }
1131
1132 void __scsi_remove_device(struct scsi_device *sdev)
1133 {
1134         struct device *dev = &sdev->sdev_gendev;
1135
1136         /*
1137          * This cleanup path is not reentrant and while it is impossible
1138          * to get a new reference with scsi_device_get() someone can still
1139          * hold a previously acquired one.
1140          */
1141         if (sdev->sdev_state == SDEV_DEL)
1142                 return;
1143
1144         if (sdev->is_visible) {
1145                 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
1146                         return;
1147
1148                 bsg_unregister_queue(sdev->request_queue);
1149                 device_unregister(&sdev->sdev_dev);
1150                 transport_remove_device(dev);
1151                 scsi_dh_remove_device(sdev);
1152                 device_del(dev);
1153         } else
1154                 put_device(&sdev->sdev_dev);
1155
1156         /*
1157          * Stop accepting new requests and wait until all queuecommand() and
1158          * scsi_run_queue() invocations have finished before tearing down the
1159          * device.
1160          */
1161         scsi_device_set_state(sdev, SDEV_DEL);
1162         blk_cleanup_queue(sdev->request_queue);
1163         cancel_work_sync(&sdev->requeue_work);
1164
1165         if (sdev->host->hostt->slave_destroy)
1166                 sdev->host->hostt->slave_destroy(sdev);
1167         transport_destroy_device(dev);
1168
1169         /*
1170          * Paired with the kref_get() in scsi_sysfs_initialize().  We have
1171          * remoed sysfs visibility from the device, so make the target
1172          * invisible if this was the last device underneath it.
1173          */
1174         scsi_target_reap(scsi_target(sdev));
1175
1176         put_device(dev);
1177 }
1178
1179 /**
1180  * scsi_remove_device - unregister a device from the scsi bus
1181  * @sdev:       scsi_device to unregister
1182  **/
1183 void scsi_remove_device(struct scsi_device *sdev)
1184 {
1185         struct Scsi_Host *shost = sdev->host;
1186
1187         mutex_lock(&shost->scan_mutex);
1188         __scsi_remove_device(sdev);
1189         mutex_unlock(&shost->scan_mutex);
1190 }
1191 EXPORT_SYMBOL(scsi_remove_device);
1192
1193 static void __scsi_remove_target(struct scsi_target *starget)
1194 {
1195         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1196         unsigned long flags;
1197         struct scsi_device *sdev;
1198
1199         spin_lock_irqsave(shost->host_lock, flags);
1200  restart:
1201         list_for_each_entry(sdev, &shost->__devices, siblings) {
1202                 if (sdev->channel != starget->channel ||
1203                     sdev->id != starget->id ||
1204                     scsi_device_get(sdev))
1205                         continue;
1206                 spin_unlock_irqrestore(shost->host_lock, flags);
1207                 scsi_remove_device(sdev);
1208                 scsi_device_put(sdev);
1209                 spin_lock_irqsave(shost->host_lock, flags);
1210                 goto restart;
1211         }
1212         spin_unlock_irqrestore(shost->host_lock, flags);
1213 }
1214
1215 /**
1216  * scsi_remove_target - try to remove a target and all its devices
1217  * @dev: generic starget or parent of generic stargets to be removed
1218  *
1219  * Note: This is slightly racy.  It is possible that if the user
1220  * requests the addition of another device then the target won't be
1221  * removed.
1222  */
1223 void scsi_remove_target(struct device *dev)
1224 {
1225         struct Scsi_Host *shost = dev_to_shost(dev->parent);
1226         struct scsi_target *starget;
1227         unsigned long flags;
1228
1229 restart:
1230         spin_lock_irqsave(shost->host_lock, flags);
1231         list_for_each_entry(starget, &shost->__targets, siblings) {
1232                 if (starget->state == STARGET_DEL ||
1233                     starget->state == STARGET_REMOVE ||
1234                     starget->state == STARGET_CREATED_REMOVE)
1235                         continue;
1236                 if (starget->dev.parent == dev || &starget->dev == dev) {
1237                         kref_get(&starget->reap_ref);
1238                         if (starget->state == STARGET_CREATED)
1239                                 starget->state = STARGET_CREATED_REMOVE;
1240                         else
1241                                 starget->state = STARGET_REMOVE;
1242                         spin_unlock_irqrestore(shost->host_lock, flags);
1243                         __scsi_remove_target(starget);
1244                         scsi_target_reap(starget);
1245                         goto restart;
1246                 }
1247         }
1248         spin_unlock_irqrestore(shost->host_lock, flags);
1249 }
1250 EXPORT_SYMBOL(scsi_remove_target);
1251
1252 int scsi_register_driver(struct device_driver *drv)
1253 {
1254         drv->bus = &scsi_bus_type;
1255
1256         return driver_register(drv);
1257 }
1258 EXPORT_SYMBOL(scsi_register_driver);
1259
1260 int scsi_register_interface(struct class_interface *intf)
1261 {
1262         intf->class = &sdev_class;
1263
1264         return class_interface_register(intf);
1265 }
1266 EXPORT_SYMBOL(scsi_register_interface);
1267
1268 /**
1269  * scsi_sysfs_add_host - add scsi host to subsystem
1270  * @shost:     scsi host struct to add to subsystem
1271  **/
1272 int scsi_sysfs_add_host(struct Scsi_Host *shost)
1273 {
1274         int error, i;
1275
1276         /* add host specific attributes */
1277         if (shost->hostt->shost_attrs) {
1278                 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
1279                         error = device_create_file(&shost->shost_dev,
1280                                         shost->hostt->shost_attrs[i]);
1281                         if (error)
1282                                 return error;
1283                 }
1284         }
1285
1286         transport_register_device(&shost->shost_gendev);
1287         transport_configure_device(&shost->shost_gendev);
1288         return 0;
1289 }
1290
1291 static struct device_type scsi_dev_type = {
1292         .name =         "scsi_device",
1293         .release =      scsi_device_dev_release,
1294         .groups =       scsi_sdev_attr_groups,
1295 };
1296
1297 void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1298 {
1299         unsigned long flags;
1300         struct Scsi_Host *shost = sdev->host;
1301         struct scsi_target  *starget = sdev->sdev_target;
1302
1303         device_initialize(&sdev->sdev_gendev);
1304         sdev->sdev_gendev.bus = &scsi_bus_type;
1305         sdev->sdev_gendev.type = &scsi_dev_type;
1306         dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu",
1307                      sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1308
1309         device_initialize(&sdev->sdev_dev);
1310         sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
1311         sdev->sdev_dev.class = &sdev_class;
1312         dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu",
1313                      sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1314         /*
1315          * Get a default scsi_level from the target (derived from sibling
1316          * devices).  This is the best we can do for guessing how to set
1317          * sdev->lun_in_cdb for the initial INQUIRY command.  For LUN 0 the
1318          * setting doesn't matter, because all the bits are zero anyway.
1319          * But it does matter for higher LUNs.
1320          */
1321         sdev->scsi_level = starget->scsi_level;
1322         if (sdev->scsi_level <= SCSI_2 &&
1323                         sdev->scsi_level != SCSI_UNKNOWN &&
1324                         !shost->no_scsi2_lun_in_cdb)
1325                 sdev->lun_in_cdb = 1;
1326
1327         transport_setup_device(&sdev->sdev_gendev);
1328         spin_lock_irqsave(shost->host_lock, flags);
1329         list_add_tail(&sdev->same_target_siblings, &starget->devices);
1330         list_add_tail(&sdev->siblings, &shost->__devices);
1331         spin_unlock_irqrestore(shost->host_lock, flags);
1332         /*
1333          * device can now only be removed via __scsi_remove_device() so hold
1334          * the target.  Target will be held in CREATED state until something
1335          * beneath it becomes visible (in which case it moves to RUNNING)
1336          */
1337         kref_get(&starget->reap_ref);
1338 }
1339
1340 int scsi_is_sdev_device(const struct device *dev)
1341 {
1342         return dev->type == &scsi_dev_type;
1343 }
1344 EXPORT_SYMBOL(scsi_is_sdev_device);
1345
1346 /* A blank transport template that is used in drivers that don't
1347  * yet implement Transport Attributes */
1348 struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };