scsi_scan.c (e63ed0d7a98014fdfc2cfeb3f6dada313dcabb59) scsi_scan.c (f2495e228fce9f9cec84367547813cbb0d6db15a)
1/*
2 * scsi_scan.c
3 *
4 * Copyright (C) 2000 Eric Youngdale,
5 * Copyright (C) 2002 Patrick Mansfield
6 *
7 * The general scanning/probing algorithm is as follows, exceptions are
8 * made to it depending on device specific flags, compilation options, and

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315}
316
317static void scsi_target_destroy(struct scsi_target *starget)
318{
319 struct device *dev = &starget->dev;
320 struct Scsi_Host *shost = dev_to_shost(dev->parent);
321 unsigned long flags;
322
1/*
2 * scsi_scan.c
3 *
4 * Copyright (C) 2000 Eric Youngdale,
5 * Copyright (C) 2002 Patrick Mansfield
6 *
7 * The general scanning/probing algorithm is as follows, exceptions are
8 * made to it depending on device specific flags, compilation options, and

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315}
316
317static void scsi_target_destroy(struct scsi_target *starget)
318{
319 struct device *dev = &starget->dev;
320 struct Scsi_Host *shost = dev_to_shost(dev->parent);
321 unsigned long flags;
322
323 starget->state = STARGET_DEL;
323 transport_destroy_device(dev);
324 spin_lock_irqsave(shost->host_lock, flags);
325 if (shost->hostt->target_destroy)
326 shost->hostt->target_destroy(starget);
327 list_del_init(&starget->siblings);
328 spin_unlock_irqrestore(shost->host_lock, flags);
329 put_device(dev);
330}

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379 * sysfs. Note: we have to be in user context here because the target reaps
380 * should be done in places where the scsi device visibility is being removed.
381 */
382static void scsi_target_reap_ref_release(struct kref *kref)
383{
384 struct scsi_target *starget
385 = container_of(kref, struct scsi_target, reap_ref);
386
324 transport_destroy_device(dev);
325 spin_lock_irqsave(shost->host_lock, flags);
326 if (shost->hostt->target_destroy)
327 shost->hostt->target_destroy(starget);
328 list_del_init(&starget->siblings);
329 spin_unlock_irqrestore(shost->host_lock, flags);
330 put_device(dev);
331}

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380 * sysfs. Note: we have to be in user context here because the target reaps
381 * should be done in places where the scsi device visibility is being removed.
382 */
383static void scsi_target_reap_ref_release(struct kref *kref)
384{
385 struct scsi_target *starget
386 = container_of(kref, struct scsi_target, reap_ref);
387
387 transport_remove_device(&starget->dev);
388 device_del(&starget->dev);
389 starget->state = STARGET_DEL;
388 /*
389 * if we get here and the target is still in the CREATED state that
390 * means it was allocated but never made visible (because a scan
391 * turned up no LUNs), so don't call device_del() on it.
392 */
393 if (starget->state != STARGET_CREATED) {
394 transport_remove_device(&starget->dev);
395 device_del(&starget->dev);
396 }
390 scsi_target_destroy(starget);
391}
392
393static void scsi_target_reap_ref_put(struct scsi_target *starget)
394{
395 kref_put(&starget->reap_ref, scsi_target_reap_ref_release);
396}
397

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501 * @starget: target to be checked
502 *
503 * This is used after removing a LUN or doing a last put of the target
504 * it checks atomically that nothing is using the target and removes
505 * it if so.
506 */
507void scsi_target_reap(struct scsi_target *starget)
508{
397 scsi_target_destroy(starget);
398}
399
400static void scsi_target_reap_ref_put(struct scsi_target *starget)
401{
402 kref_put(&starget->reap_ref, scsi_target_reap_ref_release);
403}
404

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508 * @starget: target to be checked
509 *
510 * This is used after removing a LUN or doing a last put of the target
511 * it checks atomically that nothing is using the target and removes
512 * it if so.
513 */
514void scsi_target_reap(struct scsi_target *starget)
515{
516 /*
517 * serious problem if this triggers: STARGET_DEL is only set in the if
518 * the reap_ref drops to zero, so we're trying to do another final put
519 * on an already released kref
520 */
509 BUG_ON(starget->state == STARGET_DEL);
521 BUG_ON(starget->state == STARGET_DEL);
510 if (starget->state == STARGET_CREATED)
511 scsi_target_destroy(starget);
512 else
513 scsi_target_reap_ref_put(starget);
522 scsi_target_reap_ref_put(starget);
514}
515
516/**
517 * sanitize_inquiry_string - remove non-graphical chars from an INQUIRY result string
518 * @s: INQUIRY result string to sanitize
519 * @len: length of the string
520 *
521 * Description:

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524
525/**
526 * sanitize_inquiry_string - remove non-graphical chars from an INQUIRY result string
527 * @s: INQUIRY result string to sanitize
528 * @len: length of the string
529 *
530 * Description:

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