md: set mddev readonly flag on blkdev BLKROSET ioctl

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commit e221835046 upstream.

When the user sets the block device to readwrite then the mddev should
follow suit.  Otherwise, the BUG_ON in md_write_start() will be set to
trigger.

The reverse direction, setting mddev->ro to match a set readonly
request, can be ignored because the blkdev level readonly flag precludes
the need to have mddev->ro set correctly.  Nevermind the fact that
setting mddev->ro to 1 may fail if the array is in use.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

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Dan Williams 2010-05-12 08:25:37 +10:00 • committed by Greg Kroah-Hartman

parent 82f2fa7b6f

commit 65aa78d8d9

1 changed files with 29 additions and 0 deletions

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drivers/md/md.c

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