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Commit aeb9b211 authored by NeilBrown's avatar NeilBrown
Browse files

md: ensure changes to 'write-mostly' are reflected in metadata. 



The 'write-mostly' flag can be changed through sysfs.
With 0.90 metadata, those changes are reflected in the metadata.
For 1.x metadata, they aren't.

So fix super_1_sync to record 'write-mostly' status.

Signed-off-by: default avatarNeilBrown <neilb@suse.de>
parent 5ef56c8f

drivers/md/md.c

+5 −0
Original line number Diff line number Diff line
@@ -1738,6 +1738,11 @@ static void super_1_sync(mddev_t *mddev, mdk_rdev_t *rdev) 
	sb->level = cpu_to_le32(mddev->level);

	sb->layout = cpu_to_le32(mddev->layout);



	if (test_bit(WriteMostly, &rdev->flags))

		sb->devflags |= WriteMostly1;

	else

		sb->devflags &= ~WriteMostly1;



	if (mddev->bitmap && mddev->bitmap_info.file == NULL) {

		sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset);

		sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET);