Commit 2f375ab9 authored Feb 01, 2008 by Yan Committed by Chris Mason Sep 25, 2008

Call btrfs_cow_block while lowering tree level.



When freeing root block of a tree,  btrfs_free_extent' parameter
'ref_generation' is from root block itseft.  When freeing non-root
block,  'ref_generation' is from its parent. so when converting a
non-root block to root block, we must guarantee its generation is
equal to its parent's generation.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

parent 60cde612

fs/btrfs/ctree.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -720,6 +720,9 @@ static int balance_level(struct btrfs_trans_handle *trans,
		/* promote the child to a root */
		child = read_node_slot(root, mid, 0);
		BUG_ON(!child);
		ret = btrfs_cow_block(trans, root, child, mid, 0, &child);
		BUG_ON(ret);

		root->node = child;
		path->nodes[level] = NULL;
		clean_tree_block(trans, root, mid);

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