inject.f2fs: add dentry injection

This patch enables injecting dentry block or dir entry.
print_raw_dentry_info() is added to show values of node footer.

The meanings of options are:
 * dent: means dentry is injected.

The members could be injected in cp contains:
 * d_bitmap: dentry block d_bitmap of nid
 * d_hash: dentry hash
 * d_ino: dentry ino
 * d_ftype: dentry ftype

Signed-off-by: Sheng Yong <shengyong@oppo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2 files changed