[CRIU] [PATCH 00/13] Restore nested mount namespaces (v2)

[Pavel Emelyanov]

On 03/11/2014 07:18 PM, Andrey Vagin wrote:
> Systemd is able to execute a service in a new mount namespace.
> It's used by Fedora and probably will be used in RHEL7.
> 
> All nested mount namespaces are restored as sub-trees of the root
> namespace. A namespace is restored by a task with minimal pid in this
> namespace. The task unshares mount namespace and makes pivot_root in a
> proper sub-tree. All other task from the namespace attaches to the
> namespace by calling setns().

Some test for this would be nice.

> v2: write more descriptive comments
> 
> Andrey Vagin (13):
>   crtools: close all desriptors only for the root task
>   mounts: initialize root before dumping mount namespace
>   namespace: move struct ns_id into namespace.h
>   mounts: allow to customize root path for cr_pivot_root
>   restore: add mount id-s in the ns_ids list (v2)
>   mounts: mark local root-s in the list of mount points
>   mounts: connect sub-root to the main root
>   mounts: bind mount one root for all namespaces
>   mounts: prepare to create a temporary directory for restoring non-root
>     mntns
>   mounts: create a temporary directory for restoring non-root mntns
>   crtools: restore nested mount namespaces
>   mount: allow to dump and restore nested mount namespaces
>   criu: rename current_ns_mask to root_ns_mask
> 
>  cr-dump.c            |  10 +-
>  cr-restore.c         |  51 ++++++---
>  include/mount.h      |   4 +
>  include/namespaces.h |  15 ++-
>  include/proc_parse.h |   1 +
>  include/servicefd.h  |   1 +
>  mount.c              | 294 ++++++++++++++++++++++++++++++++++++++++++++-------
>  namespaces.c         |  62 ++++++++---
>  net.c                |   4 +-
>  pstree.c             |  32 ++++--
>  sk-tcp.c             |   8 +-
>  sockets.c            |   2 +-
>  tun.c                |   2 +-
>  util.c               |  13 +++
>  14 files changed, 409 insertions(+), 90 deletions(-)
> 
> --
> 1.8.5.3
> 
> .
>