Call btrfs_cow_block while lowering tree level.

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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>

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Yan 2008-02-01 14:58:07 -05:00 • committed by Chris Mason

parent 60cde612c8

commit 2f375ab9c5

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fs/btrfs/ctree.c

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