[CRIU] [PATCH v5 00/19] epoll: Add support for duped targets

[Andrey Vagin]

Applied, thanks!

On Wed, Jul 04, 2018 at 06:51:28PM +0300, Cyrill Gorcunov wrote:
> We need to support a case where file has been added into
> epoll, then duped into some other number, and finally
> the former one is closed. So that epoll fdinfo will
> print no longer existing fd number (in this series
> we will find which new file is matching the target).
> 
> v2:
>  - add support for multiple dup'ed targets
>  - address the test for new features
> 
> v4:
>  - fix target files descriptors retrieval
>  - new test by @avagin
> 
> v5:
>  - use files rbtree to speedup target files lookup
> 
> https://travis-ci.org/cyrillos/criu/builds/400066560
> 
> Andrei Vagin (1):
>   zdtm/static: add a test to check epoll file descriptors
> 
> Cyrill Gorcunov (18):
>   kcmp: Cleanup sources
>   kcmp: Beautify kcmp-ids.h
>   kcmp: Drop empty line at EOF
>   kcmp: Add epoll definitions
>   epoll: kdat -- Check if we have KCMP_EPOLL_TFD support
>   epoll: Pass drained fds to dump_one_file
>   epoll: Use real file transferred for target fds check
>   epoll: Use kcmp to find proper target file
>   epoll: Add support for multiple duped fds
>   epoll: Show tfd in decimal form
>   epoll: Print efd id when showing targets
>   epoll: Align members in assignments
>   epoll: Add kcmp_epoll check
>   epoll: Save fields of target files in eventpoll_tfd_entry
>   epoll: Exit with error if tfd is missing
>   epoll: Add kid_lookup_epoll_tfd helper
>   files: make_gen_id -- Promote to be general helper
>   epoll: Use epoll queues to speedup multiple duped fds
> 
>  criu/cr-check.c             |  10 ++
>  criu/cr-dump.c              |   6 +
>  criu/eventpoll.c            | 330 +++++++++++++++++++++++++++++++++++++++-----
>  criu/file-ids.c             |   2 +-
>  criu/files.c                |  19 ++-
>  criu/include/eventpoll.h    |   2 +
>  criu/include/file-ids.h     |   2 +
>  criu/include/files.h        |   3 +
>  criu/include/kcmp-ids.h     |  33 +++--
>  criu/include/kcmp.h         |  10 ++
>  criu/include/kerndat.h      |   1 +
>  criu/kcmp-ids.c             |  64 ++++++++-
>  criu/kerndat.c              |  48 +++++++
>  criu/proc_parse.c           |  20 ++-
>  images/eventpoll.proto      |   5 +
>  test/zdtm/static/Makefile   |   1 +
>  test/zdtm/static/epoll.c    | 137 ++++++++++++++++++
>  test/zdtm/static/epoll.desc |   1 +
>  18 files changed, 635 insertions(+), 59 deletions(-)
>  create mode 100644 test/zdtm/static/epoll.c
>  create mode 100644 test/zdtm/static/epoll.desc
> 
> -- 
> 2.14.4
>