[Devel] [PATCH VZ10 v2 0/12] ve/cgroup-v2: support cgroup-v2 in VE

[Pavel Tikhomirov]

Second part of changes for enabling cgroup-v2:
- Enable cgroup-v2 files
- Hide cgroup files per controller
- Move ve cgroup attach operations to namespace join path
- Allow nested ve cgroup in cgroup-v2
- Link ve namespace and cgroup namespace exclusively
- Make CLONE_NEWVE easier to use from vzctl and alter original namespace
  creation ordering to be user -> ve -> other namespaces.

https://virtuozzo.atlassian.net/browse/VSTOR-119803
https://virtuozzo.atlassian.net/browse/VSTOR-119804
https://virtuozzo.atlassian.net/browse/VSTOR-119941
https://virtuozzo.atlassian.net/browse/VSTOR-104639
https://virtuozzo.atlassian.net/browse/VSTOR-119801
https://virtuozzo.atlassian.net/browse/VSTOR-118289

Signed-off-by: Pavel Tikhomirov <ptikhomirov at virtuozzo.com>

v2: append extra improving/fixing patches

Pavel Tikhomirov (12):
  cgroup-v2: Add a new API to hide cgroup files per controller
  ve: Enable files on cgroup-v2
  ve/cgroup-v2: Allow writing to some files in the root of cgroup
    namespace
  ve_namespace: Don't allow to share thread group across VE boundaries
  ve_namespace: Move cgroup ve_attach() operations to namespace join
    path
  ve_namespace: Block setns untill VE is running
  ve: Always allow to attach to ve cgroup
  ve/cgroup-v2: Allow nested ve cgroup directories
  ve/cgroup-v2: Don't hide default cgroup when ve controller is enabled
    on it
  ve_namespace: Make link between ve namespace and cgroup exclusive
  ve_namespace: Reorder VE namespace creation before other namespaces
  ve_namespace: Make CLONE_NEWVE work with clone3

 fs/sysfs/ve.c               |   2 +-
 include/linux/cgroup-defs.h |   1 +
 include/linux/cgroup.h      |   1 +
 include/linux/ve.h          |   6 ++
 kernel/cgroup/cgroup.c      | 136 +++++++++++++++++++++++++++++++++++-
 kernel/fork.c               |  56 ++++++++++-----
 kernel/ve/ve.c              | 132 ++++++++--------------------------
 kernel/ve/ve_namespace.c    |  56 +++++++++++++--
 8 files changed, 260 insertions(+), 130 deletions(-)

-- 
2.52.0