From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Wed, 13 May 2015 21:35:14 +0000 (-0700)
Subject: f2fs: truncate data blocks for orphan inode
X-Git-Tag: omap-for-v4.3/legacy-v2-signed~156^2~30
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=06e1bc05cad8d06860b52c79d4669483c7e39a4f;p=pandora-kernel.git

f2fs: truncate data blocks for orphan inode

As Hu reported, F2FS has a space leak problem, when conducting:

1) format a 4GB f2fs partition
2) dd a 3G file,
3) unlink it.

So, when doing f2fs_drop_inode(), we need to truncate data blocks
before skipping it.
We can also drop unused caches assigned to each inode.

Reported-by: hujianyang <hujianyang@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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