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Btrfs: Full back reference support

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This patch makes the back reference system to explicit record the
location of parent node for all types of extents. The location of
parent node is placed into the offset field of backref key. Every
time a tree block is balanced, the back references for the affected
lower level extents are updated.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Zheng Yan 2008-09-23 13:14:14 -04:00 • committed by Chris Mason
commit 31840ae1a6
10 changed files with 1066 additions and 722 deletions
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