scsi_sysfs.c revision 20b1e674230b642be662c5975923a0160ab9cbdc
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/config.h> 10#include <linux/module.h> 11#include <linux/init.h> 12#include <linux/blkdev.h> 13#include <linux/device.h> 14 15#include <scsi/scsi.h> 16#include <scsi/scsi_device.h> 17#include <scsi/scsi_host.h> 18#include <scsi/scsi_tcq.h> 19#include <scsi/scsi_transport.h> 20 21#include "scsi_priv.h" 22#include "scsi_logging.h" 23 24static struct { 25 enum scsi_device_state value; 26 char *name; 27} sdev_states[] = { 28 { SDEV_CREATED, "created" }, 29 { SDEV_RUNNING, "running" }, 30 { SDEV_CANCEL, "cancel" }, 31 { SDEV_DEL, "deleted" }, 32 { SDEV_QUIESCE, "quiesce" }, 33 { SDEV_OFFLINE, "offline" }, 34 { SDEV_BLOCK, "blocked" }, 35}; 36 37const char *scsi_device_state_name(enum scsi_device_state state) 38{ 39 int i; 40 char *name = NULL; 41 42 for (i = 0; i < sizeof(sdev_states)/sizeof(sdev_states[0]); i++) { 43 if (sdev_states[i].value == state) { 44 name = sdev_states[i].name; 45 break; 46 } 47 } 48 return name; 49} 50 51static int check_set(unsigned int *val, char *src) 52{ 53 char *last; 54 55 if (strncmp(src, "-", 20) == 0) { 56 *val = SCAN_WILD_CARD; 57 } else { 58 /* 59 * Doesn't check for int overflow 60 */ 61 *val = simple_strtoul(src, &last, 0); 62 if (*last != '\0') 63 return 1; 64 } 65 return 0; 66} 67 68static int scsi_scan(struct Scsi_Host *shost, const char *str) 69{ 70 char s1[15], s2[15], s3[15], junk; 71 unsigned int channel, id, lun; 72 int res; 73 74 res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk); 75 if (res != 3) 76 return -EINVAL; 77 if (check_set(&channel, s1)) 78 return -EINVAL; 79 if (check_set(&id, s2)) 80 return -EINVAL; 81 if (check_set(&lun, s3)) 82 return -EINVAL; 83 res = scsi_scan_host_selected(shost, channel, id, lun, 1); 84 return res; 85} 86 87/* 88 * shost_show_function: macro to create an attr function that can be used to 89 * show a non-bit field. 90 */ 91#define shost_show_function(name, field, format_string) \ 92static ssize_t \ 93show_##name (struct class_device *class_dev, char *buf) \ 94{ \ 95 struct Scsi_Host *shost = class_to_shost(class_dev); \ 96 return snprintf (buf, 20, format_string, shost->field); \ 97} 98 99/* 100 * shost_rd_attr: macro to create a function and attribute variable for a 101 * read only field. 102 */ 103#define shost_rd_attr2(name, field, format_string) \ 104 shost_show_function(name, field, format_string) \ 105static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); 106 107#define shost_rd_attr(field, format_string) \ 108shost_rd_attr2(field, field, format_string) 109 110/* 111 * Create the actual show/store functions and data structures. 112 */ 113 114static ssize_t store_scan(struct class_device *class_dev, const char *buf, 115 size_t count) 116{ 117 struct Scsi_Host *shost = class_to_shost(class_dev); 118 int res; 119 120 res = scsi_scan(shost, buf); 121 if (res == 0) 122 res = count; 123 return res; 124}; 125static CLASS_DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); 126 127shost_rd_attr(unique_id, "%u\n"); 128shost_rd_attr(host_busy, "%hu\n"); 129shost_rd_attr(cmd_per_lun, "%hd\n"); 130shost_rd_attr(sg_tablesize, "%hu\n"); 131shost_rd_attr(unchecked_isa_dma, "%d\n"); 132shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); 133 134static struct class_device_attribute *scsi_sysfs_shost_attrs[] = { 135 &class_device_attr_unique_id, 136 &class_device_attr_host_busy, 137 &class_device_attr_cmd_per_lun, 138 &class_device_attr_sg_tablesize, 139 &class_device_attr_unchecked_isa_dma, 140 &class_device_attr_proc_name, 141 &class_device_attr_scan, 142 NULL 143}; 144 145static void scsi_device_cls_release(struct class_device *class_dev) 146{ 147 struct scsi_device *sdev; 148 149 sdev = class_to_sdev(class_dev); 150 put_device(&sdev->sdev_gendev); 151} 152 153void scsi_device_dev_release(struct device *dev) 154{ 155 struct scsi_device *sdev; 156 struct device *parent; 157 struct scsi_target *starget; 158 unsigned long flags; 159 160 parent = dev->parent; 161 sdev = to_scsi_device(dev); 162 starget = to_scsi_target(parent); 163 164 spin_lock_irqsave(sdev->host->host_lock, flags); 165 starget->reap_ref++; 166 list_del(&sdev->siblings); 167 list_del(&sdev->same_target_siblings); 168 list_del(&sdev->starved_entry); 169 spin_unlock_irqrestore(sdev->host->host_lock, flags); 170 171 if (sdev->request_queue) { 172 sdev->request_queue->queuedata = NULL; 173 scsi_free_queue(sdev->request_queue); 174 /* temporary expedient, try to catch use of queue lock 175 * after free of sdev */ 176 sdev->request_queue = NULL; 177 } 178 179 scsi_target_reap(scsi_target(sdev)); 180 181 kfree(sdev->inquiry); 182 kfree(sdev); 183 184 if (parent) 185 put_device(parent); 186} 187 188struct class sdev_class = { 189 .name = "scsi_device", 190 .release = scsi_device_cls_release, 191}; 192 193/* all probing is done in the individual ->probe routines */ 194static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) 195{ 196 struct scsi_device *sdp = to_scsi_device(dev); 197 if (sdp->no_uld_attach) 198 return 0; 199 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; 200} 201 202struct bus_type scsi_bus_type = { 203 .name = "scsi", 204 .match = scsi_bus_match, 205}; 206 207int scsi_sysfs_register(void) 208{ 209 int error; 210 211 error = bus_register(&scsi_bus_type); 212 if (!error) { 213 error = class_register(&sdev_class); 214 if (error) 215 bus_unregister(&scsi_bus_type); 216 } 217 218 return error; 219} 220 221void scsi_sysfs_unregister(void) 222{ 223 class_unregister(&sdev_class); 224 bus_unregister(&scsi_bus_type); 225} 226 227/* 228 * sdev_show_function: macro to create an attr function that can be used to 229 * show a non-bit field. 230 */ 231#define sdev_show_function(field, format_string) \ 232static ssize_t \ 233sdev_show_##field (struct device *dev, char *buf) \ 234{ \ 235 struct scsi_device *sdev; \ 236 sdev = to_scsi_device(dev); \ 237 return snprintf (buf, 20, format_string, sdev->field); \ 238} \ 239 240/* 241 * sdev_rd_attr: macro to create a function and attribute variable for a 242 * read only field. 243 */ 244#define sdev_rd_attr(field, format_string) \ 245 sdev_show_function(field, format_string) \ 246static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); 247 248 249/* 250 * sdev_rd_attr: create a function and attribute variable for a 251 * read/write field. 252 */ 253#define sdev_rw_attr(field, format_string) \ 254 sdev_show_function(field, format_string) \ 255 \ 256static ssize_t \ 257sdev_store_##field (struct device *dev, const char *buf, size_t count) \ 258{ \ 259 struct scsi_device *sdev; \ 260 sdev = to_scsi_device(dev); \ 261 snscanf (buf, 20, format_string, &sdev->field); \ 262 return count; \ 263} \ 264static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); 265 266/* Currently we don't export bit fields, but we might in future, 267 * so leave this code in */ 268#if 0 269/* 270 * sdev_rd_attr: create a function and attribute variable for a 271 * read/write bit field. 272 */ 273#define sdev_rw_attr_bit(field) \ 274 sdev_show_function(field, "%d\n") \ 275 \ 276static ssize_t \ 277sdev_store_##field (struct device *dev, const char *buf, size_t count) \ 278{ \ 279 int ret; \ 280 struct scsi_device *sdev; \ 281 ret = scsi_sdev_check_buf_bit(buf); \ 282 if (ret >= 0) { \ 283 sdev = to_scsi_device(dev); \ 284 sdev->field = ret; \ 285 ret = count; \ 286 } \ 287 return ret; \ 288} \ 289static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); 290 291/* 292 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", 293 * else return -EINVAL. 294 */ 295static int scsi_sdev_check_buf_bit(const char *buf) 296{ 297 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { 298 if (buf[0] == '1') 299 return 1; 300 else if (buf[0] == '0') 301 return 0; 302 else 303 return -EINVAL; 304 } else 305 return -EINVAL; 306} 307#endif 308/* 309 * Create the actual show/store functions and data structures. 310 */ 311sdev_rd_attr (device_blocked, "%d\n"); 312sdev_rd_attr (queue_depth, "%d\n"); 313sdev_rd_attr (type, "%d\n"); 314sdev_rd_attr (scsi_level, "%d\n"); 315sdev_rd_attr (vendor, "%.8s\n"); 316sdev_rd_attr (model, "%.16s\n"); 317sdev_rd_attr (rev, "%.4s\n"); 318 319static ssize_t 320sdev_show_timeout (struct device *dev, char *buf) 321{ 322 struct scsi_device *sdev; 323 sdev = to_scsi_device(dev); 324 return snprintf (buf, 20, "%d\n", sdev->timeout / HZ); 325} 326 327static ssize_t 328sdev_store_timeout (struct device *dev, const char *buf, size_t count) 329{ 330 struct scsi_device *sdev; 331 int timeout; 332 sdev = to_scsi_device(dev); 333 sscanf (buf, "%d\n", &timeout); 334 sdev->timeout = timeout * HZ; 335 return count; 336} 337static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); 338 339static ssize_t 340store_rescan_field (struct device *dev, const char *buf, size_t count) 341{ 342 scsi_rescan_device(dev); 343 return count; 344} 345static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); 346 347static ssize_t sdev_store_delete(struct device *dev, const char *buf, 348 size_t count) 349{ 350 scsi_remove_device(to_scsi_device(dev)); 351 return count; 352}; 353static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); 354 355static ssize_t 356store_state_field(struct device *dev, const char *buf, size_t count) 357{ 358 int i; 359 struct scsi_device *sdev = to_scsi_device(dev); 360 enum scsi_device_state state = 0; 361 362 for (i = 0; i < sizeof(sdev_states)/sizeof(sdev_states[0]); i++) { 363 const int len = strlen(sdev_states[i].name); 364 if (strncmp(sdev_states[i].name, buf, len) == 0 && 365 buf[len] == '\n') { 366 state = sdev_states[i].value; 367 break; 368 } 369 } 370 if (!state) 371 return -EINVAL; 372 373 if (scsi_device_set_state(sdev, state)) 374 return -EINVAL; 375 return count; 376} 377 378static ssize_t 379show_state_field(struct device *dev, char *buf) 380{ 381 struct scsi_device *sdev = to_scsi_device(dev); 382 const char *name = scsi_device_state_name(sdev->sdev_state); 383 384 if (!name) 385 return -EINVAL; 386 387 return snprintf(buf, 20, "%s\n", name); 388} 389 390static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); 391 392static ssize_t 393show_queue_type_field(struct device *dev, char *buf) 394{ 395 struct scsi_device *sdev = to_scsi_device(dev); 396 const char *name = "none"; 397 398 if (sdev->ordered_tags) 399 name = "ordered"; 400 else if (sdev->simple_tags) 401 name = "simple"; 402 403 return snprintf(buf, 20, "%s\n", name); 404} 405 406static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); 407 408static ssize_t 409show_iostat_counterbits(struct device *dev, char *buf) 410{ 411 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); 412} 413 414static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); 415 416#define show_sdev_iostat(field) \ 417static ssize_t \ 418show_iostat_##field(struct device *dev, char *buf) \ 419{ \ 420 struct scsi_device *sdev = to_scsi_device(dev); \ 421 unsigned long long count = atomic_read(&sdev->field); \ 422 return snprintf(buf, 20, "0x%llx\n", count); \ 423} \ 424static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) 425 426show_sdev_iostat(iorequest_cnt); 427show_sdev_iostat(iodone_cnt); 428show_sdev_iostat(ioerr_cnt); 429 430 431/* Default template for device attributes. May NOT be modified */ 432static struct device_attribute *scsi_sysfs_sdev_attrs[] = { 433 &dev_attr_device_blocked, 434 &dev_attr_queue_depth, 435 &dev_attr_queue_type, 436 &dev_attr_type, 437 &dev_attr_scsi_level, 438 &dev_attr_vendor, 439 &dev_attr_model, 440 &dev_attr_rev, 441 &dev_attr_rescan, 442 &dev_attr_delete, 443 &dev_attr_state, 444 &dev_attr_timeout, 445 &dev_attr_iocounterbits, 446 &dev_attr_iorequest_cnt, 447 &dev_attr_iodone_cnt, 448 &dev_attr_ioerr_cnt, 449 NULL 450}; 451 452static ssize_t sdev_store_queue_depth_rw(struct device *dev, const char *buf, 453 size_t count) 454{ 455 int depth, retval; 456 struct scsi_device *sdev = to_scsi_device(dev); 457 struct scsi_host_template *sht = sdev->host->hostt; 458 459 if (!sht->change_queue_depth) 460 return -EINVAL; 461 462 depth = simple_strtoul(buf, NULL, 0); 463 464 if (depth < 1) 465 return -EINVAL; 466 467 retval = sht->change_queue_depth(sdev, depth); 468 if (retval < 0) 469 return retval; 470 471 return count; 472} 473 474static struct device_attribute sdev_attr_queue_depth_rw = 475 __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, 476 sdev_store_queue_depth_rw); 477 478static ssize_t sdev_store_queue_type_rw(struct device *dev, const char *buf, 479 size_t count) 480{ 481 struct scsi_device *sdev = to_scsi_device(dev); 482 struct scsi_host_template *sht = sdev->host->hostt; 483 int tag_type = 0, retval; 484 int prev_tag_type = scsi_get_tag_type(sdev); 485 486 if (!sdev->tagged_supported || !sht->change_queue_type) 487 return -EINVAL; 488 489 if (strncmp(buf, "ordered", 7) == 0) 490 tag_type = MSG_ORDERED_TAG; 491 else if (strncmp(buf, "simple", 6) == 0) 492 tag_type = MSG_SIMPLE_TAG; 493 else if (strncmp(buf, "none", 4) != 0) 494 return -EINVAL; 495 496 if (tag_type == prev_tag_type) 497 return count; 498 499 retval = sht->change_queue_type(sdev, tag_type); 500 if (retval < 0) 501 return retval; 502 503 return count; 504} 505 506static struct device_attribute sdev_attr_queue_type_rw = 507 __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, 508 sdev_store_queue_type_rw); 509 510static struct device_attribute *attr_changed_internally( 511 struct Scsi_Host *shost, 512 struct device_attribute * attr) 513{ 514 if (!strcmp("queue_depth", attr->attr.name) 515 && shost->hostt->change_queue_depth) 516 return &sdev_attr_queue_depth_rw; 517 else if (!strcmp("queue_type", attr->attr.name) 518 && shost->hostt->change_queue_type) 519 return &sdev_attr_queue_type_rw; 520 return attr; 521} 522 523 524static struct device_attribute *attr_overridden( 525 struct device_attribute **attrs, 526 struct device_attribute *attr) 527{ 528 int i; 529 530 if (!attrs) 531 return NULL; 532 for (i = 0; attrs[i]; i++) 533 if (!strcmp(attrs[i]->attr.name, attr->attr.name)) 534 return attrs[i]; 535 return NULL; 536} 537 538static int attr_add(struct device *dev, struct device_attribute *attr) 539{ 540 struct device_attribute *base_attr; 541 542 /* 543 * Spare the caller from having to copy things it's not interested in. 544 */ 545 base_attr = attr_overridden(scsi_sysfs_sdev_attrs, attr); 546 if (base_attr) { 547 /* extend permissions */ 548 attr->attr.mode |= base_attr->attr.mode; 549 550 /* override null show/store with default */ 551 if (!attr->show) 552 attr->show = base_attr->show; 553 if (!attr->store) 554 attr->store = base_attr->store; 555 } 556 557 return device_create_file(dev, attr); 558} 559 560/** 561 * scsi_sysfs_add_sdev - add scsi device to sysfs 562 * @sdev: scsi_device to add 563 * 564 * Return value: 565 * 0 on Success / non-zero on Failure 566 **/ 567int scsi_sysfs_add_sdev(struct scsi_device *sdev) 568{ 569 int error, i; 570 571 if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0) 572 return error; 573 574 error = device_add(&sdev->sdev_gendev); 575 if (error) { 576 put_device(sdev->sdev_gendev.parent); 577 printk(KERN_INFO "error 1\n"); 578 return error; 579 } 580 error = class_device_add(&sdev->sdev_classdev); 581 if (error) { 582 printk(KERN_INFO "error 2\n"); 583 goto clean_device; 584 } 585 586 /* take a reference for the sdev_classdev; this is 587 * released by the sdev_class .release */ 588 get_device(&sdev->sdev_gendev); 589 if (sdev->host->hostt->sdev_attrs) { 590 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { 591 error = attr_add(&sdev->sdev_gendev, 592 sdev->host->hostt->sdev_attrs[i]); 593 if (error) { 594 scsi_remove_device(sdev); 595 goto out; 596 } 597 } 598 } 599 600 for (i = 0; scsi_sysfs_sdev_attrs[i]; i++) { 601 if (!attr_overridden(sdev->host->hostt->sdev_attrs, 602 scsi_sysfs_sdev_attrs[i])) { 603 struct device_attribute * attr = 604 attr_changed_internally(sdev->host, 605 scsi_sysfs_sdev_attrs[i]); 606 error = device_create_file(&sdev->sdev_gendev, attr); 607 if (error) { 608 scsi_remove_device(sdev); 609 goto out; 610 } 611 } 612 } 613 614 transport_add_device(&sdev->sdev_gendev); 615 out: 616 return error; 617 618 clean_device: 619 scsi_device_set_state(sdev, SDEV_CANCEL); 620 621 device_del(&sdev->sdev_gendev); 622 transport_destroy_device(&sdev->sdev_gendev); 623 put_device(&sdev->sdev_gendev); 624 625 return error; 626} 627 628/** 629 * scsi_remove_device - unregister a device from the scsi bus 630 * @sdev: scsi_device to unregister 631 **/ 632void scsi_remove_device(struct scsi_device *sdev) 633{ 634 struct Scsi_Host *shost = sdev->host; 635 636 down(&shost->scan_mutex); 637 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) 638 goto out; 639 640 class_device_unregister(&sdev->sdev_classdev); 641 device_del(&sdev->sdev_gendev); 642 scsi_device_set_state(sdev, SDEV_DEL); 643 if (sdev->host->hostt->slave_destroy) 644 sdev->host->hostt->slave_destroy(sdev); 645 transport_unregister_device(&sdev->sdev_gendev); 646 put_device(&sdev->sdev_gendev); 647out: 648 up(&shost->scan_mutex); 649} 650EXPORT_SYMBOL(scsi_remove_device); 651 652void __scsi_remove_target(struct scsi_target *starget) 653{ 654 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 655 unsigned long flags; 656 struct scsi_device *sdev, *tmp; 657 658 spin_lock_irqsave(shost->host_lock, flags); 659 starget->reap_ref++; 660 list_for_each_entry_safe(sdev, tmp, &shost->__devices, siblings) { 661 if (sdev->channel != starget->channel || 662 sdev->id != starget->id) 663 continue; 664 spin_unlock_irqrestore(shost->host_lock, flags); 665 scsi_remove_device(sdev); 666 spin_lock_irqsave(shost->host_lock, flags); 667 } 668 spin_unlock_irqrestore(shost->host_lock, flags); 669 scsi_target_reap(starget); 670} 671 672static int __remove_child (struct device * dev, void * data) 673{ 674 if (scsi_is_target_device(dev)) 675 __scsi_remove_target(to_scsi_target(dev)); 676 return 0; 677} 678 679/** 680 * scsi_remove_target - try to remove a target and all its devices 681 * @dev: generic starget or parent of generic stargets to be removed 682 * 683 * Note: This is slightly racy. It is possible that if the user 684 * requests the addition of another device then the target won't be 685 * removed. 686 */ 687void scsi_remove_target(struct device *dev) 688{ 689 struct device *rdev; 690 691 if (scsi_is_target_device(dev)) { 692 __scsi_remove_target(to_scsi_target(dev)); 693 return; 694 } 695 696 rdev = get_device(dev); 697 device_for_each_child(dev, NULL, __remove_child); 698 put_device(rdev); 699} 700EXPORT_SYMBOL(scsi_remove_target); 701 702int scsi_register_driver(struct device_driver *drv) 703{ 704 drv->bus = &scsi_bus_type; 705 706 return driver_register(drv); 707} 708EXPORT_SYMBOL(scsi_register_driver); 709 710int scsi_register_interface(struct class_interface *intf) 711{ 712 intf->class = &sdev_class; 713 714 return class_interface_register(intf); 715} 716EXPORT_SYMBOL(scsi_register_interface); 717 718 719static struct class_device_attribute *class_attr_overridden( 720 struct class_device_attribute **attrs, 721 struct class_device_attribute *attr) 722{ 723 int i; 724 725 if (!attrs) 726 return NULL; 727 for (i = 0; attrs[i]; i++) 728 if (!strcmp(attrs[i]->attr.name, attr->attr.name)) 729 return attrs[i]; 730 return NULL; 731} 732 733static int class_attr_add(struct class_device *classdev, 734 struct class_device_attribute *attr) 735{ 736 struct class_device_attribute *base_attr; 737 738 /* 739 * Spare the caller from having to copy things it's not interested in. 740 */ 741 base_attr = class_attr_overridden(scsi_sysfs_shost_attrs, attr); 742 if (base_attr) { 743 /* extend permissions */ 744 attr->attr.mode |= base_attr->attr.mode; 745 746 /* override null show/store with default */ 747 if (!attr->show) 748 attr->show = base_attr->show; 749 if (!attr->store) 750 attr->store = base_attr->store; 751 } 752 753 return class_device_create_file(classdev, attr); 754} 755 756/** 757 * scsi_sysfs_add_host - add scsi host to subsystem 758 * @shost: scsi host struct to add to subsystem 759 * @dev: parent struct device pointer 760 **/ 761int scsi_sysfs_add_host(struct Scsi_Host *shost) 762{ 763 int error, i; 764 765 if (shost->hostt->shost_attrs) { 766 for (i = 0; shost->hostt->shost_attrs[i]; i++) { 767 error = class_attr_add(&shost->shost_classdev, 768 shost->hostt->shost_attrs[i]); 769 if (error) 770 return error; 771 } 772 } 773 774 for (i = 0; scsi_sysfs_shost_attrs[i]; i++) { 775 if (!class_attr_overridden(shost->hostt->shost_attrs, 776 scsi_sysfs_shost_attrs[i])) { 777 error = class_device_create_file(&shost->shost_classdev, 778 scsi_sysfs_shost_attrs[i]); 779 if (error) 780 return error; 781 } 782 } 783 784 transport_register_device(&shost->shost_gendev); 785 return 0; 786} 787 788void scsi_sysfs_device_initialize(struct scsi_device *sdev) 789{ 790 unsigned long flags; 791 struct Scsi_Host *shost = sdev->host; 792 struct scsi_target *starget = sdev->sdev_target; 793 794 device_initialize(&sdev->sdev_gendev); 795 sdev->sdev_gendev.bus = &scsi_bus_type; 796 sdev->sdev_gendev.release = scsi_device_dev_release; 797 sprintf(sdev->sdev_gendev.bus_id,"%d:%d:%d:%d", 798 sdev->host->host_no, sdev->channel, sdev->id, 799 sdev->lun); 800 801 class_device_initialize(&sdev->sdev_classdev); 802 sdev->sdev_classdev.dev = &sdev->sdev_gendev; 803 sdev->sdev_classdev.class = &sdev_class; 804 snprintf(sdev->sdev_classdev.class_id, BUS_ID_SIZE, 805 "%d:%d:%d:%d", sdev->host->host_no, 806 sdev->channel, sdev->id, sdev->lun); 807 sdev->scsi_level = SCSI_2; 808 transport_setup_device(&sdev->sdev_gendev); 809 spin_lock_irqsave(shost->host_lock, flags); 810 list_add_tail(&sdev->same_target_siblings, &starget->devices); 811 list_add_tail(&sdev->siblings, &shost->__devices); 812 spin_unlock_irqrestore(shost->host_lock, flags); 813} 814 815int scsi_is_sdev_device(const struct device *dev) 816{ 817 return dev->release == scsi_device_dev_release; 818} 819EXPORT_SYMBOL(scsi_is_sdev_device); 820 821/* A blank transport template that is used in drivers that don't 822 * yet implement Transport Attributes */ 823struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; 824