[CRIU] [RFC] [PATCH 0/4] shmem: don't use map_files, when it's posible

[Andrey Vagin]

/proc/PID/map_files are protected by the global CAP_SYS_ADMIN, so we
need to avoid using them to support user namespaces.

We are going to use memfd_create() to get the first file descriptor and
then all others processes will able to open it via /proc/PID/fd/X.

Andrey Vagin (3):
  syscall: add memfd_create()
  shmem: rework getting file descriptors for shared memory regions
  mem: use memfd_create() to restore shared memory reqions

 arch/arm/syscall.def        |  1 +
 arch/x86/syscall-x86-64.def |  1 +
 include/kerndat.h           |  2 ++
 include/shmem.h             |  2 ++
 kerndat.c                   | 18 ++++++++++
 pie/restorer.c              | 10 ------
 shmem.c                     | 83 +++++++++++++++++++++++++++++++++++----------
 7 files changed, 89 insertions(+), 28 deletions(-)

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1.9.3