Commit 3e74317a authored Apr 27, 2012 by Jan Schmidt Committed by Chris Mason Apr 27, 2012

Btrfs: fix repair code for RAID10

btrfs_map_block sets mirror_num, so that the repair code knows eventually
which device gave us the read error. For RAID10, mirror_num must be 1 or 2.
Before this fix mirror_num was incorrectly related to our stripe index.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

parent 996d282c

fs/btrfs/volumes.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -3807,10 +3807,11 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
		else if (mirror_num)
		stripe_index += mirror_num - 1;
		else {
		int old_stripe_index = stripe_index;
		stripe_index = find_live_mirror(map, stripe_index,
		map->sub_stripes, stripe_index +
		current->pid % map->sub_stripes);
		mirror_num = stripe_index + 1;
		mirror_num = stripe_index - old_stripe_index + 1;
		}
		} else {
		/*