Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
md: fix two raid10 bugs
1/ When resyncing a degraded raid10 which has more than 2 copies of each block,
garbage can get synced on top of good data.
2/ We round the wrong way in part of the device size calculation, which
can cause confusion.
Signed-off-by: Neil Brown <neilb@suse.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
authored by
NeilBrown
and committed by
Linus Torvalds
af03b8e4
edad01e2
+6
+6
drivers/md/raid10.c
+6
drivers/md/raid10.c
···
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int d = r10_bio->devs[i].devnum;
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bio = r10_bio->devs[i].bio;
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bio->bi_end_io = NULL;
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+
clear_bit(BIO_UPTODATE, &bio->bi_flags);
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if (conf->mirrors[d].rdev == NULL ||
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test_bit(Faulty, &conf->mirrors[d].rdev->flags))
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continue;
···
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/* 'size' is now the number of chunks in the array */
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/* calculate "used chunks per device" in 'stride' */
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stride = size * conf->copies;
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+
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/* We need to round up when dividing by raid_disks to
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+
* get the stride size.
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+
*/
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+
stride += conf->raid_disks - 1;
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sector_div(stride, conf->raid_disks);
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mddev->size = stride << (conf->chunk_shift-1);
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