[v6] xfstests: add a new test case for ext4 indirect-based file

[Rich Johnston]

This has not been reviewed since your second revision.
It looks good except you need to remove the changes to tests/generic/255 
and rebase against the latest tree.

You can then include a:
Reviewed-by: Rich Johnston <rjohnston at sgi.com>

Thanks
--Rich

On 05/15/2013 10:52 PM, wenqing.lz wrote:
> From: Zheng Liu <wenqing.lz at taobao.com>
>
> After applied this commit (864688d3), xfstests #255 will not test a
> file system that cannot support fallocate(2), such as a indirect-based
> file in ext4.  So we need to add a new generic test case to test it.
>
> The difference between #255 and this test case is only to use pwrite to
> allocate blocks.  Other filesystems should survive in this test case.
> In the mean time, a new argument '-u' is added into _test_generic_punch
> not to run unwritten tests.
>
And remove these 2 lines as they no longer apply.
> Meanwhile this commit fixes a minor problem in #255 that testfile should
> use $seq.$$ as testfile.
>
> Signed-off-by: Zheng Liu <wenqing.lz at taobao.com>
>
> ---
> changelog:
>   * rebase against the latest master of xfstests tree (Based-on Eric's patch).
>
>   common/punch          | 164 ++++++++++++++++++++++++++-----------------------
>   tests/generic/255     |   2 +-