[CRIU] [PATCH 0/6 v2] split a mount tree to restore over-mounted mounts

[Andrei Vagin]

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On Thu, Sep 22, 2016 at 09:16:35AM +0300, Andrei Vagin wrote:
> From: Andrei Vagin <avagin at virtuozzo.com>
> 
> If a mount overmounts something else, we can try to restore it
> separetly and then move it to the right places after restoring
> all mounts.
> 
> In this patch if we see that a mount is overmounts something,
> we create a new directory in the root yard and restore this
> mount and its sub-tree in this directory.
> 
> This series allows to handle systemd services for which
> PrivateDevices is set in config files.
> 
> https://bugs.openvz.org/browse/OVZ-6778
> Signed-off-by: Andrei Vagin <avagin at virtuozzo.com>
> 
> v2: fix comments from Pavel
> 
> Andrei Vagin (6):
>   [v2] mnt: add a function to check whether a mount overmounts something
>   mnt: restore shared mounts in a correct shared group
>   mnt: add a sub-id to print_ns_root
>   mnt: rename roots_mp into root_yard_mp and make it global
>   [v2] mnt: try to split a mount tree to restore over-mounted mounts
>   zdtm: add a test to check a mount tree with overmounts
> 
>  criu/mount.c                      | 218 ++++++++++++++++++++++++++++++++++----
>  test/zdtm/static/Makefile         |   1 +
>  test/zdtm/static/mntns_remap.c    | 101 ++++++++++++++++++
>  test/zdtm/static/mntns_remap.desc |   1 +
>  4 files changed, 298 insertions(+), 23 deletions(-)
>  create mode 100644 test/zdtm/static/mntns_remap.c
>  create mode 100644 test/zdtm/static/mntns_remap.desc
> 
> --
> 2.7.4
>