Btrfs: dummy extent buffers for tree mod log

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The tree modification log needs two ways to create dummy extent buffers,
once by allocating a fresh one (to rebuild an old root) and once by
cloning an existing one (to make private rewind modifications) to it.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>

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This commit is contained in:

Jan Schmidt 2012-05-16 17:00:02 +02:00

parent 64947ec0d1

commit 815a51c74a

2 changed files with 76 additions and 7 deletions

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80

fs/btrfs/extent_io.c

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3

fs/btrfs/extent_io.h

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