ocfs2: Add normal functions for reflink a normal file's extents.

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2 major functions are added in this patch.

ocfs2_attach_refcount_tree will create a new refcount tree to the
old file if it doesn't have one and insert all the extent records
to the tree if they are not refcounted.

ocfs2_create_reflink_node will:
1. set the refcount tree to the new file.
2. call ocfs2_duplicate_extent_list which will iterate all the
   extents for the old file, insert it to the new file and increase
   the corresponding referennce count.

Signed-off-by: Tao Ma <tao.ma@oracle.com>

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Tao Ma 2009-08-22 23:54:27 +08:00 • committed by Joel Becker

parent 37f8a2bfaa

commit 110a045aca

1 changed files with 286 additions and 0 deletions

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fs/ocfs2/refcounttree.c

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