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Commit 63b106a8 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'md/4.6-rc2-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 

Pull MD fixes from Shaohua Li:
 "This update mainly fixes bugs:

   - fix error handling (Guoqing)
   - fix a crash when a disk is hotremoved (me)
   - fix a dead loop (Wei Fang)"

* tag 'md/4.6-rc2-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  md/bitmap: clear bitmap if bitmap_create failed
  MD: add rdev reference for super write
  md: fix a trivial typo in comments
  md:raid1: fix a dead loop when read from a WriteMostly disk
parents 40bca9db f9a67b11

drivers/md/bitmap.c

+11 −8
Original line number Diff line number Diff line
@@ -1673,6 +1673,9 @@ static void bitmap_free(struct bitmap *bitmap) 
	if (!bitmap) /* there was no bitmap */

		return;



	if (bitmap->sysfs_can_clear)

		sysfs_put(bitmap->sysfs_can_clear);



	if (mddev_is_clustered(bitmap->mddev) && bitmap->mddev->cluster_info &&

		bitmap->cluster_slot == md_cluster_ops->slot_number(bitmap->mddev))

		md_cluster_stop(bitmap->mddev);
@@ -1712,15 +1715,13 @@ void bitmap_destroy(struct mddev *mddev) 
	if (mddev->thread)

		mddev->thread->timeout = MAX_SCHEDULE_TIMEOUT;



	if (bitmap->sysfs_can_clear)

		sysfs_put(bitmap->sysfs_can_clear);



	bitmap_free(bitmap);

}



/*

 * initialize the bitmap structure

 * if this returns an error, bitmap_destroy must be called to do clean up

 * once mddev->bitmap is set

 */

struct bitmap *bitmap_create(struct mddev *mddev, int slot)

{
@@ -1865,8 +1866,10 @@ int bitmap_copy_from_slot(struct mddev *mddev, int slot, 
	struct bitmap_counts *counts;

	struct bitmap *bitmap = bitmap_create(mddev, slot);



	if (IS_ERR(bitmap))

	if (IS_ERR(bitmap)) {

		bitmap_free(bitmap);

		return PTR_ERR(bitmap);

	}



	rv = bitmap_init_from_disk(bitmap, 0);

	if (rv)
@@ -2170,17 +2173,17 @@ location_store(struct mddev *mddev, const char *buf, size_t len) 
				else {

					mddev->bitmap = bitmap;

					rv = bitmap_load(mddev);

					if (rv) {

						bitmap_destroy(mddev);

					if (rv)

						mddev->bitmap_info.offset = 0;

				}

				}

				mddev->pers->quiesce(mddev, 0);

				if (rv)

				if (rv) {

					bitmap_destroy(mddev);

					return rv;

				}

			}

		}

	}

	if (!mddev->external) {

		/* Ensure new bitmap info is stored in

		 * metadata promptly.

drivers/md/md.c

+4 −1
Original line number Diff line number Diff line
@@ -718,6 +718,7 @@ static void super_written(struct bio *bio) 


	if (atomic_dec_and_test(&mddev->pending_writes))

		wake_up(&mddev->sb_wait);

	rdev_dec_pending(rdev, mddev);

	bio_put(bio);

}
@@ -732,6 +733,8 @@ void md_super_write(struct mddev *mddev, struct md_rdev *rdev, 
	 */

	struct bio *bio = bio_alloc_mddev(GFP_NOIO, 1, mddev);



	atomic_inc(&rdev->nr_pending);



	bio->bi_bdev = rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev;

	bio->bi_iter.bi_sector = sector;

	bio_add_page(bio, page, size, 0);
@@ -6883,7 +6886,7 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode, 


	case ADD_NEW_DISK:

		/* We can support ADD_NEW_DISK on read-only arrays

		 * on if we are re-adding a preexisting device.

		 * only if we are re-adding a preexisting device.

		 * So require mddev->pers and MD_DISK_SYNC.

		 */

		if (mddev->pers) {

drivers/md/raid1.c

+1 −1
Original line number Diff line number Diff line
@@ -570,7 +570,7 @@ static int read_balance(struct r1conf *conf, struct r1bio *r1_bio, int *max_sect 
			if (best_dist_disk < 0) {

				if (is_badblock(rdev, this_sector, sectors,

						&first_bad, &bad_sectors)) {

					if (first_bad < this_sector)

					if (first_bad <= this_sector)

						/* Cannot use this */

						continue;

					best_good_sectors = first_bad - this_sector;