tree aea73bd670910874eb78fd1f2c8ce8b2a494dfcb
parent 7a102b09232be1ad7c180dfd1f46c7aa95dff1e0
author Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> 1250324533 +0900
committer Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> 1252920435 +0900

nilfs2: add update functions of virtual block address to dat

This is a preparation for the successive cleanup ("nilfs2: allow btree
to directly call dat operations").

This adds functions bundling a few operations to change an entry of
virtual block address on the dat file.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>