[CRIU] [PATCH 0/9] unix: Add support for bindmounted dgram sockets

[Cyrill Gorcunov]

On Sat, Jun 9, 2018 at 4:26 PM Cyrill Gorcunov <gorcunov at gmail.com> wrote:

> Sometime digram sockets are bindmounted to other locations, for
> example we had containers where /dev/log is mounted into another
> places.
>
> To support it we do the following:
>
>  - on checkpoint we examitate bindmounts if there is a unix
>    socket behind it, and if so we mark it with flag in images;
>
>  - on restore we use fdstore to keep "pre-opened" sockets since
>    generation of mount tree is happened earlier than file restoration,
>    later when we need to open such file we simply fetch it from the
>    fdstore.
>
> Note the series is appliable on top of ghost sockets support
>
>  | [PATCH v7 0/8] Add support of deleted unix sockets
>
> https://travis-ci.org/cyrillos/criu/builds/390107668
>
> Cyrill Gorcunov (9):
>   zdtm: Add sstrncpy helper
>   unix: image -- Shift mnt_id index
>   unix: image -- Move uflags into enum
>   unix: Collect bindmounted unix sockets
>   unix: Collect images before opening mountpoints
>   unix: Collect bindmounted unix sockets into own list
>   unix: Move shared data init into early stage
>   unix: Add support for bindmounted sockets
>   unix: Add bind-mount-unix test case
>
>  criu/cr-dump.c                        |   3 +
>  criu/cr-restore.c                     |   5 +-
>  criu/include/sockets.h                |   4 +
>  criu/mount.c                          |   7 +
>  criu/sk-unix.c                        | 408
> +++++++++++++++++++++++++++-------
>  images/sk-unix.proto                  |  16 +-
>  test/zdtm/lib/zdtmtst.h               |   5 +
>  test/zdtm/static/Makefile             |   1 +
>  test/zdtm/static/bind-mount-unix.c    | 139 ++++++++++++
>  test/zdtm/static/bind-mount-unix.desc |   1 +
>  10 files changed, 505 insertions(+), 84 deletions(-)
>  create mode 100644 test/zdtm/static/bind-mount-unix.c
>  create mode 100644 test/zdtm/static/bind-mount-unix.desc
>
> --
> 2.14.4
>
>
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