tree 0f2477b99923f231c45205d5d444baa122a1b8fb
parent 912a83b5096eb4a5d8d95124d70585e0e861c564
author Jaegeuk Kim <jaegeuk@kernel.org> 1431552914 -0700
committer Jaegeuk Kim <jaegeuk@kernel.org> 1433200854 -0700

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>