tree 10758d6a55c529aced177da3f6bf45cf26361913
parent a22285a6a32390195235171b89d157ed1a1fe932
author Yan, Zheng <zheng.yan@oracle.com> 1274021327 -0400
committer Chris Mason <chris.mason@oracle.com> 1274798091 -0400

Btrfs: Update metadata reservation for delayed allocation

Introduce metadata reservation context for delayed allocation
and update various related functions.

This patch also introduces EXTENT_FIRST_DELALLOC control bit for
set/clear_extent_bit. It tells set/clear_bit_hook whether they
are processing the first extent_state with EXTENT_DELALLOC bit
set. This change is important if set/clear_extent_bit involves
multiple extent_state.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>