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md: Increment version for clustered bitmaps

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Add BITMAP_MAJOR_CLUSTERED as 5, in order to prevent older kernels
to assemble a clustered device.

In order to maximize compatibility, the major version is set to
BITMAP_MAJOR_CLUSTERED *only* if the bitmap is clustered.

Added MD_FEATURE_CLUSTERED in order to return error for older
kernels which would assemble MD even if the bitmap is corrupted.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: NeilBrown <neilb@suse.com>
This commit is contained in:
Goldwyn Rodrigues
2015-08-19 07:35:54 +10:00
parent 9ed38ff530
commit 3c462c880b
4 changed files with 11 additions and 6 deletions
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3
drivers/md/md.c
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@@ -1735,6 +1735,9 @@ static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev)
}
}
if (mddev_is_clustered(mddev))
sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED);
if (rdev->badblocks.count == 0)
/* Nothing to do for bad blocks*/ ;
else if (sb->bblog_offset == 0)