scsi_sysfs.c revision 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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 } 175 176 scsi_target_reap(scsi_target(sdev)); 177 178 kfree(sdev->inquiry); 179 kfree(sdev); 180 181 if (parent) 182 put_device(parent); 183} 184 185struct class sdev_class = { 186 .name = "scsi_device", 187 .release = scsi_device_cls_release, 188}; 189 190/* all probing is done in the individual ->probe routines */ 191static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) 192{ 193 struct scsi_device *sdp = to_scsi_device(dev); 194 if (sdp->no_uld_attach) 195 return 0; 196 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; 197} 198 199struct bus_type scsi_bus_type = { 200 .name = "scsi", 201 .match = scsi_bus_match, 202}; 203 204int scsi_sysfs_register(void) 205{ 206 int error; 207 208 error = bus_register(&scsi_bus_type); 209 if (!error) { 210 error = class_register(&sdev_class); 211 if (error) 212 bus_unregister(&scsi_bus_type); 213 } 214 215 return error; 216} 217 218void scsi_sysfs_unregister(void) 219{ 220 class_unregister(&sdev_class); 221 bus_unregister(&scsi_bus_type); 222} 223 224/* 225 * sdev_show_function: macro to create an attr function that can be used to 226 * show a non-bit field. 227 */ 228#define sdev_show_function(field, format_string) \ 229static ssize_t \ 230sdev_show_##field (struct device *dev, char *buf) \ 231{ \ 232 struct scsi_device *sdev; \ 233 sdev = to_scsi_device(dev); \ 234 return snprintf (buf, 20, format_string, sdev->field); \ 235} \ 236 237/* 238 * sdev_rd_attr: macro to create a function and attribute variable for a 239 * read only field. 240 */ 241#define sdev_rd_attr(field, format_string) \ 242 sdev_show_function(field, format_string) \ 243static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); 244 245 246/* 247 * sdev_rd_attr: create a function and attribute variable for a 248 * read/write field. 249 */ 250#define sdev_rw_attr(field, format_string) \ 251 sdev_show_function(field, format_string) \ 252 \ 253static ssize_t \ 254sdev_store_##field (struct device *dev, const char *buf, size_t count) \ 255{ \ 256 struct scsi_device *sdev; \ 257 sdev = to_scsi_device(dev); \ 258 snscanf (buf, 20, format_string, &sdev->field); \ 259 return count; \ 260} \ 261static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); 262 263/* Currently we don't export bit fields, but we might in future, 264 * so leave this code in */ 265#if 0 266/* 267 * sdev_rd_attr: create a function and attribute variable for a 268 * read/write bit field. 269 */ 270#define sdev_rw_attr_bit(field) \ 271 sdev_show_function(field, "%d\n") \ 272 \ 273static ssize_t \ 274sdev_store_##field (struct device *dev, const char *buf, size_t count) \ 275{ \ 276 int ret; \ 277 struct scsi_device *sdev; \ 278 ret = scsi_sdev_check_buf_bit(buf); \ 279 if (ret >= 0) { \ 280 sdev = to_scsi_device(dev); \ 281 sdev->field = ret; \ 282 ret = count; \ 283 } \ 284 return ret; \ 285} \ 286static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); 287 288/* 289 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", 290 * else return -EINVAL. 291 */ 292static int scsi_sdev_check_buf_bit(const char *buf) 293{ 294 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { 295 if (buf[0] == '1') 296 return 1; 297 else if (buf[0] == '0') 298 return 0; 299 else 300 return -EINVAL; 301 } else 302 return -EINVAL; 303} 304#endif 305/* 306 * Create the actual show/store functions and data structures. 307 */ 308sdev_rd_attr (device_blocked, "%d\n"); 309sdev_rd_attr (queue_depth, "%d\n"); 310sdev_rd_attr (type, "%d\n"); 311sdev_rd_attr (scsi_level, "%d\n"); 312sdev_rd_attr (vendor, "%.8s\n"); 313sdev_rd_attr (model, "%.16s\n"); 314sdev_rd_attr (rev, "%.4s\n"); 315 316static ssize_t 317sdev_show_timeout (struct device *dev, char *buf) 318{ 319 struct scsi_device *sdev; 320 sdev = to_scsi_device(dev); 321 return snprintf (buf, 20, "%d\n", sdev->timeout / HZ); 322} 323 324static ssize_t 325sdev_store_timeout (struct device *dev, const char *buf, size_t count) 326{ 327 struct scsi_device *sdev; 328 int timeout; 329 sdev = to_scsi_device(dev); 330 sscanf (buf, "%d\n", &timeout); 331 sdev->timeout = timeout * HZ; 332 return count; 333} 334static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); 335 336static ssize_t 337store_rescan_field (struct device *dev, const char *buf, size_t count) 338{ 339 scsi_rescan_device(dev); 340 return count; 341} 342static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); 343 344static ssize_t sdev_store_delete(struct device *dev, const char *buf, 345 size_t count) 346{ 347 scsi_remove_device(to_scsi_device(dev)); 348 return count; 349}; 350static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); 351 352static ssize_t 353store_state_field(struct device *dev, const char *buf, size_t count) 354{ 355 int i; 356 struct scsi_device *sdev = to_scsi_device(dev); 357 enum scsi_device_state state = 0; 358 359 for (i = 0; i < sizeof(sdev_states)/sizeof(sdev_states[0]); i++) { 360 const int len = strlen(sdev_states[i].name); 361 if (strncmp(sdev_states[i].name, buf, len) == 0 && 362 buf[len] == '\n') { 363 state = sdev_states[i].value; 364 break; 365 } 366 } 367 if (!state) 368 return -EINVAL; 369 370 if (scsi_device_set_state(sdev, state)) 371 return -EINVAL; 372 return count; 373} 374 375static ssize_t 376show_state_field(struct device *dev, char *buf) 377{ 378 struct scsi_device *sdev = to_scsi_device(dev); 379 const char *name = scsi_device_state_name(sdev->sdev_state); 380 381 if (!name) 382 return -EINVAL; 383 384 return snprintf(buf, 20, "%s\n", name); 385} 386 387static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); 388 389static ssize_t 390show_queue_type_field(struct device *dev, char *buf) 391{ 392 struct scsi_device *sdev = to_scsi_device(dev); 393 const char *name = "none"; 394 395 if (sdev->ordered_tags) 396 name = "ordered"; 397 else if (sdev->simple_tags) 398 name = "simple"; 399 400 return snprintf(buf, 20, "%s\n", name); 401} 402 403static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); 404 405static ssize_t 406show_iostat_counterbits(struct device *dev, char *buf) 407{ 408 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); 409} 410 411static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); 412 413#define show_sdev_iostat(field) \ 414static ssize_t \ 415show_iostat_##field(struct device *dev, char *buf) \ 416{ \ 417 struct scsi_device *sdev = to_scsi_device(dev); \ 418 unsigned long long count = atomic_read(&sdev->field); \ 419 return snprintf(buf, 20, "0x%llx\n", count); \ 420} \ 421static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) 422 423show_sdev_iostat(iorequest_cnt); 424show_sdev_iostat(iodone_cnt); 425show_sdev_iostat(ioerr_cnt); 426 427 428/* Default template for device attributes. May NOT be modified */ 429static struct device_attribute *scsi_sysfs_sdev_attrs[] = { 430 &dev_attr_device_blocked, 431 &dev_attr_queue_depth, 432 &dev_attr_queue_type, 433 &dev_attr_type, 434 &dev_attr_scsi_level, 435 &dev_attr_vendor, 436 &dev_attr_model, 437 &dev_attr_rev, 438 &dev_attr_rescan, 439 &dev_attr_delete, 440 &dev_attr_state, 441 &dev_attr_timeout, 442 &dev_attr_iocounterbits, 443 &dev_attr_iorequest_cnt, 444 &dev_attr_iodone_cnt, 445 &dev_attr_ioerr_cnt, 446 NULL 447}; 448 449static ssize_t sdev_store_queue_depth_rw(struct device *dev, const char *buf, 450 size_t count) 451{ 452 int depth, retval; 453 struct scsi_device *sdev = to_scsi_device(dev); 454 struct scsi_host_template *sht = sdev->host->hostt; 455 456 if (!sht->change_queue_depth) 457 return -EINVAL; 458 459 depth = simple_strtoul(buf, NULL, 0); 460 461 if (depth < 1) 462 return -EINVAL; 463 464 retval = sht->change_queue_depth(sdev, depth); 465 if (retval < 0) 466 return retval; 467 468 return count; 469} 470 471static struct device_attribute sdev_attr_queue_depth_rw = 472 __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, 473 sdev_store_queue_depth_rw); 474 475static ssize_t sdev_store_queue_type_rw(struct device *dev, const char *buf, 476 size_t count) 477{ 478 struct scsi_device *sdev = to_scsi_device(dev); 479 struct scsi_host_template *sht = sdev->host->hostt; 480 int tag_type = 0, retval; 481 int prev_tag_type = scsi_get_tag_type(sdev); 482 483 if (!sdev->tagged_supported || !sht->change_queue_type) 484 return -EINVAL; 485 486 if (strncmp(buf, "ordered", 7) == 0) 487 tag_type = MSG_ORDERED_TAG; 488 else if (strncmp(buf, "simple", 6) == 0) 489 tag_type = MSG_SIMPLE_TAG; 490 else if (strncmp(buf, "none", 4) != 0) 491 return -EINVAL; 492 493 if (tag_type == prev_tag_type) 494 return count; 495 496 retval = sht->change_queue_type(sdev, tag_type); 497 if (retval < 0) 498 return retval; 499 500 return count; 501} 502 503static struct device_attribute sdev_attr_queue_type_rw = 504 __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, 505 sdev_store_queue_type_rw); 506 507static struct device_attribute *attr_changed_internally( 508 struct Scsi_Host *shost, 509 struct device_attribute * attr) 510{ 511 if (!strcmp("queue_depth", attr->attr.name) 512 && shost->hostt->change_queue_depth) 513 return &sdev_attr_queue_depth_rw; 514 else if (!strcmp("queue_type", attr->attr.name) 515 && shost->hostt->change_queue_type) 516 return &sdev_attr_queue_type_rw; 517 return attr; 518} 519 520 521static struct device_attribute *attr_overridden( 522 struct device_attribute **attrs, 523 struct device_attribute *attr) 524{ 525 int i; 526 527 if (!attrs) 528 return NULL; 529 for (i = 0; attrs[i]; i++) 530 if (!strcmp(attrs[i]->attr.name, attr->attr.name)) 531 return attrs[i]; 532 return NULL; 533} 534 535static int attr_add(struct device *dev, struct device_attribute *attr) 536{ 537 struct device_attribute *base_attr; 538 539 /* 540 * Spare the caller from having to copy things it's not interested in. 541 */ 542 base_attr = attr_overridden(scsi_sysfs_sdev_attrs, attr); 543 if (base_attr) { 544 /* extend permissions */ 545 attr->attr.mode |= base_attr->attr.mode; 546 547 /* override null show/store with default */ 548 if (!attr->show) 549 attr->show = base_attr->show; 550 if (!attr->store) 551 attr->store = base_attr->store; 552 } 553 554 return device_create_file(dev, attr); 555} 556 557/** 558 * scsi_sysfs_add_sdev - add scsi device to sysfs 559 * @sdev: scsi_device to add 560 * 561 * Return value: 562 * 0 on Success / non-zero on Failure 563 **/ 564int scsi_sysfs_add_sdev(struct scsi_device *sdev) 565{ 566 int error, i; 567 568 if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0) 569 return error; 570 571 error = device_add(&sdev->sdev_gendev); 572 if (error) { 573 put_device(sdev->sdev_gendev.parent); 574 printk(KERN_INFO "error 1\n"); 575 return error; 576 } 577 error = class_device_add(&sdev->sdev_classdev); 578 if (error) { 579 printk(KERN_INFO "error 2\n"); 580 goto clean_device; 581 } 582 583 /* take a reference for the sdev_classdev; this is 584 * released by the sdev_class .release */ 585 get_device(&sdev->sdev_gendev); 586 if (sdev->host->hostt->sdev_attrs) { 587 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { 588 error = attr_add(&sdev->sdev_gendev, 589 sdev->host->hostt->sdev_attrs[i]); 590 if (error) { 591 scsi_remove_device(sdev); 592 goto out; 593 } 594 } 595 } 596 597 for (i = 0; scsi_sysfs_sdev_attrs[i]; i++) { 598 if (!attr_overridden(sdev->host->hostt->sdev_attrs, 599 scsi_sysfs_sdev_attrs[i])) { 600 struct device_attribute * attr = 601 attr_changed_internally(sdev->host, 602 scsi_sysfs_sdev_attrs[i]); 603 error = device_create_file(&sdev->sdev_gendev, attr); 604 if (error) { 605 scsi_remove_device(sdev); 606 goto out; 607 } 608 } 609 } 610 611 transport_add_device(&sdev->sdev_gendev); 612 out: 613 return error; 614 615 clean_device: 616 scsi_device_set_state(sdev, SDEV_CANCEL); 617 618 device_del(&sdev->sdev_gendev); 619 transport_destroy_device(&sdev->sdev_gendev); 620 put_device(&sdev->sdev_gendev); 621 622 return error; 623} 624 625/** 626 * scsi_remove_device - unregister a device from the scsi bus 627 * @sdev: scsi_device to unregister 628 **/ 629void scsi_remove_device(struct scsi_device *sdev) 630{ 631 struct Scsi_Host *shost = sdev->host; 632 633 down(&shost->scan_mutex); 634 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) 635 goto out; 636 637 class_device_unregister(&sdev->sdev_classdev); 638 device_del(&sdev->sdev_gendev); 639 scsi_device_set_state(sdev, SDEV_DEL); 640 if (sdev->host->hostt->slave_destroy) 641 sdev->host->hostt->slave_destroy(sdev); 642 transport_unregister_device(&sdev->sdev_gendev); 643 put_device(&sdev->sdev_gendev); 644out: 645 up(&shost->scan_mutex); 646} 647EXPORT_SYMBOL(scsi_remove_device); 648 649void __scsi_remove_target(struct scsi_target *starget) 650{ 651 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 652 unsigned long flags; 653 struct scsi_device *sdev, *tmp; 654 655 spin_lock_irqsave(shost->host_lock, flags); 656 starget->reap_ref++; 657 list_for_each_entry_safe(sdev, tmp, &shost->__devices, siblings) { 658 if (sdev->channel != starget->channel || 659 sdev->id != starget->id) 660 continue; 661 spin_unlock_irqrestore(shost->host_lock, flags); 662 scsi_remove_device(sdev); 663 spin_lock_irqsave(shost->host_lock, flags); 664 } 665 spin_unlock_irqrestore(shost->host_lock, flags); 666 scsi_target_reap(starget); 667} 668 669/** 670 * scsi_remove_target - try to remove a target and all its devices 671 * @dev: generic starget or parent of generic stargets to be removed 672 * 673 * Note: This is slightly racy. It is possible that if the user 674 * requests the addition of another device then the target won't be 675 * removed. 676 */ 677void scsi_remove_target(struct device *dev) 678{ 679 struct device *rdev, *idev, *next; 680 681 if (scsi_is_target_device(dev)) { 682 __scsi_remove_target(to_scsi_target(dev)); 683 return; 684 } 685 686 rdev = get_device(dev); 687 list_for_each_entry_safe(idev, next, &dev->children, node) { 688 if (scsi_is_target_device(idev)) 689 __scsi_remove_target(to_scsi_target(idev)); 690 } 691 put_device(rdev); 692} 693EXPORT_SYMBOL(scsi_remove_target); 694 695int scsi_register_driver(struct device_driver *drv) 696{ 697 drv->bus = &scsi_bus_type; 698 699 return driver_register(drv); 700} 701EXPORT_SYMBOL(scsi_register_driver); 702 703int scsi_register_interface(struct class_interface *intf) 704{ 705 intf->class = &sdev_class; 706 707 return class_interface_register(intf); 708} 709EXPORT_SYMBOL(scsi_register_interface); 710 711 712static struct class_device_attribute *class_attr_overridden( 713 struct class_device_attribute **attrs, 714 struct class_device_attribute *attr) 715{ 716 int i; 717 718 if (!attrs) 719 return NULL; 720 for (i = 0; attrs[i]; i++) 721 if (!strcmp(attrs[i]->attr.name, attr->attr.name)) 722 return attrs[i]; 723 return NULL; 724} 725 726static int class_attr_add(struct class_device *classdev, 727 struct class_device_attribute *attr) 728{ 729 struct class_device_attribute *base_attr; 730 731 /* 732 * Spare the caller from having to copy things it's not interested in. 733 */ 734 base_attr = class_attr_overridden(scsi_sysfs_shost_attrs, attr); 735 if (base_attr) { 736 /* extend permissions */ 737 attr->attr.mode |= base_attr->attr.mode; 738 739 /* override null show/store with default */ 740 if (!attr->show) 741 attr->show = base_attr->show; 742 if (!attr->store) 743 attr->store = base_attr->store; 744 } 745 746 return class_device_create_file(classdev, attr); 747} 748 749/** 750 * scsi_sysfs_add_host - add scsi host to subsystem 751 * @shost: scsi host struct to add to subsystem 752 * @dev: parent struct device pointer 753 **/ 754int scsi_sysfs_add_host(struct Scsi_Host *shost) 755{ 756 int error, i; 757 758 if (shost->hostt->shost_attrs) { 759 for (i = 0; shost->hostt->shost_attrs[i]; i++) { 760 error = class_attr_add(&shost->shost_classdev, 761 shost->hostt->shost_attrs[i]); 762 if (error) 763 return error; 764 } 765 } 766 767 for (i = 0; scsi_sysfs_shost_attrs[i]; i++) { 768 if (!class_attr_overridden(shost->hostt->shost_attrs, 769 scsi_sysfs_shost_attrs[i])) { 770 error = class_device_create_file(&shost->shost_classdev, 771 scsi_sysfs_shost_attrs[i]); 772 if (error) 773 return error; 774 } 775 } 776 777 transport_register_device(&shost->shost_gendev); 778 return 0; 779} 780 781void scsi_sysfs_device_initialize(struct scsi_device *sdev) 782{ 783 unsigned long flags; 784 struct Scsi_Host *shost = sdev->host; 785 struct scsi_target *starget = sdev->sdev_target; 786 787 device_initialize(&sdev->sdev_gendev); 788 sdev->sdev_gendev.bus = &scsi_bus_type; 789 sdev->sdev_gendev.release = scsi_device_dev_release; 790 sprintf(sdev->sdev_gendev.bus_id,"%d:%d:%d:%d", 791 sdev->host->host_no, sdev->channel, sdev->id, 792 sdev->lun); 793 794 class_device_initialize(&sdev->sdev_classdev); 795 sdev->sdev_classdev.dev = &sdev->sdev_gendev; 796 sdev->sdev_classdev.class = &sdev_class; 797 snprintf(sdev->sdev_classdev.class_id, BUS_ID_SIZE, 798 "%d:%d:%d:%d", sdev->host->host_no, 799 sdev->channel, sdev->id, sdev->lun); 800 sdev->scsi_level = SCSI_2; 801 transport_setup_device(&sdev->sdev_gendev); 802 spin_lock_irqsave(shost->host_lock, flags); 803 list_add_tail(&sdev->same_target_siblings, &starget->devices); 804 list_add_tail(&sdev->siblings, &shost->__devices); 805 spin_unlock_irqrestore(shost->host_lock, flags); 806} 807 808int scsi_is_sdev_device(const struct device *dev) 809{ 810 return dev->release == scsi_device_dev_release; 811} 812EXPORT_SYMBOL(scsi_is_sdev_device); 813 814/* A blank transport template that is used in drivers that don't 815 * yet implement Transport Attributes */ 816struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; 817