[PATCH v5 2/2] xlog: Remove inprogress files on start

[Vladimir Davydov]

On Wed, Jun 20, 2018 at 07:25:56PM +0300, Ilya Markov wrote:
> When tarantool crashes during writing to vylog, index, run or snapshot,
> inprogress files remain. But garbage collector doesn't take into account
> these files. So they remain until they are removed manually.
> 
> Fix this with adding deletion of such files to functions memtx_engine_end_recovery,
> vinyl_engine_end_recovery and vy_run_remove_files.
> 
> - Add 3 errinj which simulate the crash before renaming inprogress files.
> - Moved const string inprogress_suffix to xlog.h and replace it with
>   #defiled string in order to reuse it in vinyl run and index files removal.
> - Add 2 new vy_file_type in order to support formatting of inprogress
>   files names.
> 
> Closes #3406
> ---
>  src/box/memtx_engine.c   |   1 +
>  src/box/vinyl.c          |   3 +
>  src/box/vy_log.c         |   7 +-
>  src/box/vy_run.c         |  19 ++++-
>  src/box/vy_run.h         |   2 +
>  src/box/xlog.c           |  29 +++++++-
>  src/box/xlog.h           |  11 +++
>  src/errinj.h             |   3 +
>  test/box/errinj.result   | 185 +++++++++++++++++++++++++++++++++++++++++++++++
>  test/box/errinj.test.lua |  72 +++++++++++++++++-
>  10 files changed, 326 insertions(+), 6 deletions(-)

Reworked the test, polished the code, and pushed.