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

[Andrey Vagin]

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().

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(-)

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1.8.5.3