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Commit f0ca340c authored by NeilBrown's avatar NeilBrown Committed by Linus Torvalds
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[PATCH] md: Make sure array geometry changes persist with version-1 superblocks 



super_1_sync only updates fields in the superblock that might have changed.

'raid_disks' and 'size' could have changed, but this information doesn't get
updated....  until this patch.

Signed-off-by: default avatarNeil Brown <neilb@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 6d89332b

drivers/md/md.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -1161,6 +1161,9 @@ static void super_1_sync(mddev_t *mddev, mdk_rdev_t *rdev) 




	sb->cnt_corrected_read = atomic_read(&rdev->corrected_errors);

	sb->cnt_corrected_read = atomic_read(&rdev->corrected_errors);





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

	sb->size = cpu_to_le64(mddev->size);



	if (mddev->bitmap && mddev->bitmap_file == NULL) {

	if (mddev->bitmap && mddev->bitmap_file == NULL) {

		sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_offset);

		sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_offset);

		sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET);

		sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET);