[CRIU] [PATCH 0/2] mount: don't create a temporary directory if /tmp exists

[Andrei Vagin]

From: Andrei Vagin <avagin at virtuozzo.com>

pivot_root requires a place where to move an old root. Currently
a temporary directory is created for this, but it doesn't
work if the / directory is read-only.

Actually we can use any existing directory. In this patch,
criu tries to use /tmp and only if it doesn't exist,
criu creates a temporary directory.

Andrei Vagin (2):
  mount: don't create a temporary directory if /tmp exists
  zdtm: check a case when a root of sub-mntns is read-only

 criu/mount.c                        | 16 ++++++---
 test/zdtm/static/Makefile           |  1 +
 test/zdtm/static/mntns_ro_root.c    | 70 +++++++++++++++++++++++++++++++++++++
 test/zdtm/static/mntns_ro_root.desc |  1 +
 4 files changed, 83 insertions(+), 5 deletions(-)
 create mode 100644 test/zdtm/static/mntns_ro_root.c
 create mode 100644 test/zdtm/static/mntns_ro_root.desc

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2.7.4