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Commit 544ae5f9 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://neil.brown.name/md 

* 'for-linus' of git://neil.brown.name/md:
  md: use interruptible wait when duration is controlled by userspace.
  md/raid5: suspend shouldn't affect read requests.
  md: tidy up error paths in md_alloc
  md: fix error path when duplicate name is found on md device creation.
  md: avoid dereferencing NULL pointer when accessing suspend_* sysfs attributes.
  md: Use new topology calls to indicate alignment and I/O sizes
parents 7b85425f e62e58a5

drivers/md/linear.c

+2 −2
Original line number Diff line number Diff line
@@ -166,8 +166,8 @@ static linear_conf_t *linear_conf(mddev_t *mddev, int raid_disks) 
			rdev->sectors = sectors * mddev->chunk_sectors;

		}



		blk_queue_stack_limits(mddev->queue,

				       rdev->bdev->bd_disk->queue);

		disk_stack_limits(mddev->gendisk, rdev->bdev,

				  rdev->data_offset << 9);

		/* as we don't honour merge_bvec_fn, we must never risk

		 * violating it, so limit ->max_sector to one PAGE, as

		 * a one page request is never in violation.

drivers/md/md.c

+32 −24
Original line number Diff line number Diff line
@@ -3573,7 +3573,8 @@ suspend_lo_store(mddev_t *mddev, const char *buf, size_t len) 
	char *e;

	unsigned long long new = simple_strtoull(buf, &e, 10);



	if (mddev->pers->quiesce == NULL)

	if (mddev->pers == NULL || 

	    mddev->pers->quiesce == NULL)

		return -EINVAL;

	if (buf == e || (*e && *e != '\n'))

		return -EINVAL;
@@ -3601,7 +3602,8 @@ suspend_hi_store(mddev_t *mddev, const char *buf, size_t len) 
	char *e;

	unsigned long long new = simple_strtoull(buf, &e, 10);



	if (mddev->pers->quiesce == NULL)

	if (mddev->pers == NULL ||

	    mddev->pers->quiesce == NULL)

		return -EINVAL;

	if (buf == e || (*e && *e != '\n'))

		return -EINVAL;
@@ -3844,11 +3846,9 @@ static int md_alloc(dev_t dev, char *name) 
	flush_scheduled_work();



	mutex_lock(&disks_mutex);

	if (mddev->gendisk) {

		mutex_unlock(&disks_mutex);

		mddev_put(mddev);

		return -EEXIST;

	}

	error = -EEXIST;

	if (mddev->gendisk)

		goto abort;



	if (name) {

		/* Need to ensure that 'name' is not a duplicate.
@@ -3860,17 +3860,15 @@ static int md_alloc(dev_t dev, char *name) 
			if (mddev2->gendisk &&

			    strcmp(mddev2->gendisk->disk_name, name) == 0) {

				spin_unlock(&all_mddevs_lock);

				return -EEXIST;

				goto abort;

			}

		spin_unlock(&all_mddevs_lock);

	}



	error = -ENOMEM;

	mddev->queue = blk_alloc_queue(GFP_KERNEL);

	if (!mddev->queue) {

		mutex_unlock(&disks_mutex);

		mddev_put(mddev);

		return -ENOMEM;

	}

	if (!mddev->queue)

		goto abort;

	mddev->queue->queuedata = mddev;



	/* Can be unlocked because the queue is new: no concurrency */
@@ -3880,11 +3878,9 @@ static int md_alloc(dev_t dev, char *name) 


	disk = alloc_disk(1 << shift);

	if (!disk) {

		mutex_unlock(&disks_mutex);

		blk_cleanup_queue(mddev->queue);

		mddev->queue = NULL;

		mddev_put(mddev);

		return -ENOMEM;

		goto abort;

	}

	disk->major = MAJOR(mddev->unit);

	disk->first_minor = unit << shift;
@@ -3906,16 +3902,22 @@ static int md_alloc(dev_t dev, char *name) 
	mddev->gendisk = disk;

	error = kobject_init_and_add(&mddev->kobj, &md_ktype,

				     &disk_to_dev(disk)->kobj, "%s", "md");

	mutex_unlock(&disks_mutex);

	if (error)

	if (error) {

		/* This isn't possible, but as kobject_init_and_add is marked

		 * __must_check, we must do something with the result

		 */

		printk(KERN_WARNING "md: cannot register %s/md - name in use\n",

		       disk->disk_name);

	else {

		error = 0;

	}

 abort:

	mutex_unlock(&disks_mutex);

	if (!error) {

		kobject_uevent(&mddev->kobj, KOBJ_ADD);

		mddev->sysfs_state = sysfs_get_dirent(mddev->kobj.sd, "array_state");

	}

	mddev_put(mddev);

	return 0;

	return error;

}



static struct kobject *md_probe(dev_t dev, int *part, void *data)
@@ -6334,10 +6336,16 @@ void md_do_sync(mddev_t *mddev) 
			sysfs_notify(&mddev->kobj, NULL, "sync_completed");

		}



		if (j >= mddev->resync_max)

			wait_event(mddev->recovery_wait,

		while (j >= mddev->resync_max && !kthread_should_stop()) {

			/* As this condition is controlled by user-space,

			 * we can block indefinitely, so use '_interruptible'

			 * to avoid triggering warnings.

			 */

			flush_signals(current); /* just in case */

			wait_event_interruptible(mddev->recovery_wait,

						 mddev->resync_max > j

						 || kthread_should_stop());

		}



		if (kthread_should_stop())

			goto interrupted;

drivers/md/multipath.c

+4 −3
Original line number Diff line number Diff line
@@ -294,7 +294,8 @@ static int multipath_add_disk(mddev_t *mddev, mdk_rdev_t *rdev) 
	for (path = first; path <= last; path++)

		if ((p=conf->multipaths+path)->rdev == NULL) {

			q = rdev->bdev->bd_disk->queue;

			blk_queue_stack_limits(mddev->queue, q);

			disk_stack_limits(mddev->gendisk, rdev->bdev,

					  rdev->data_offset << 9);



		/* as we don't honour merge_bvec_fn, we must never risk

		 * violating it, so limit ->max_sector to one PAGE, as
@@ -463,9 +464,9 @@ static int multipath_run (mddev_t *mddev) 


		disk = conf->multipaths + disk_idx;

		disk->rdev = rdev;

		disk_stack_limits(mddev->gendisk, rdev->bdev,

				  rdev->data_offset << 9);



		blk_queue_stack_limits(mddev->queue,

				       rdev->bdev->bd_disk->queue);

		/* as we don't honour merge_bvec_fn, we must never risk

		 * violating it, not that we ever expect a device with

		 * a merge_bvec_fn to be involved in multipath */

drivers/md/raid0.c

+7 −2
Original line number Diff line number Diff line
@@ -170,8 +170,8 @@ static int create_strip_zones(mddev_t *mddev) 
		}

		dev[j] = rdev1;



		blk_queue_stack_limits(mddev->queue,

				       rdev1->bdev->bd_disk->queue);

		disk_stack_limits(mddev->gendisk, rdev1->bdev,

				  rdev1->data_offset << 9);

		/* as we don't honour merge_bvec_fn, we must never risk

		 * violating it, so limit ->max_sector to one PAGE, as

		 * a one page request is never in violation.
@@ -250,6 +250,11 @@ static int create_strip_zones(mddev_t *mddev) 
		       mddev->chunk_sectors << 9);

		goto abort;

	}



	blk_queue_io_min(mddev->queue, mddev->chunk_sectors << 9);

	blk_queue_io_opt(mddev->queue,

			 (mddev->chunk_sectors << 9) * mddev->raid_disks);



	printk(KERN_INFO "raid0: done.\n");

	mddev->private = conf;

	return 0;

drivers/md/raid1.c

+4 −5
Original line number Diff line number Diff line
@@ -1123,8 +1123,8 @@ static int raid1_add_disk(mddev_t *mddev, mdk_rdev_t *rdev) 
	for (mirror = first; mirror <= last; mirror++)

		if ( !(p=conf->mirrors+mirror)->rdev) {



			blk_queue_stack_limits(mddev->queue,

					       rdev->bdev->bd_disk->queue);

			disk_stack_limits(mddev->gendisk, rdev->bdev,

					  rdev->data_offset << 9);

			/* as we don't honour merge_bvec_fn, we must never risk

			 * violating it, so limit ->max_sector to one PAGE, as

			 * a one page request is never in violation.
@@ -1988,9 +1988,8 @@ static int run(mddev_t *mddev) 
		disk = conf->mirrors + disk_idx;



		disk->rdev = rdev;



		blk_queue_stack_limits(mddev->queue,

				       rdev->bdev->bd_disk->queue);

		disk_stack_limits(mddev->gendisk, rdev->bdev,

				  rdev->data_offset << 9);

		/* as we don't honour merge_bvec_fn, we must never risk

		 * violating it, so limit ->max_sector to one PAGE, as

		 * a one page request is never in violation.