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Btrfs: Remove offset field from struct btrfs_extent_ref

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The offset field in struct btrfs_extent_ref records the position
inside file that file extent is referenced by. In the new back
reference system, tree leaves holding references to file extent
are recorded explicitly. We can scan these tree leaves very quickly, so the
offset field is not required.

This patch also makes the back reference system check the objectid
when extents are in deleting.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
This commit is contained in:
Yan Zheng 2008-10-09 11:46:24 -04:00 • committed by Chris Mason
commit 3bb1a1bc42
8 changed files with 115 additions and 144 deletions
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