Hello everyone!

With help of Peter's comprehensive review I finally present 3rd version
of this series.

Changes since last revision:

 - minor code improvements including memory leaks fixes

 - splitted and regrouped some patches for more logical structure

 - fixed issue with erroneous disk with data file detatch

 - completely rewritten tests

 - added some piece of documentation

Nikolai Barybin (15):
  conf: add data-file feature and related fields to virStorageSource
  Add VIR_STORAGE_FILE_FEATURE_DATA_FILE to virStorageFileFeature enum
  conf: schemas: add data-file store to domain rng schema
  conf: implement XML parsing/formating for dataFileStore
  storage file: add getDataFile function to FileTypeInfo
  storage file: add qcow2 data-file path parsing from header
  storage file: fill in src->dataFileStore during file probe
  security: DAC: handle qcow2 data-file on image label set/restore
  security: selinux: handle qcow2 data-file on image label set/restore
  security: apparmor: handle qcow2 data-file
  qemu: put data-file path to VM's cgroup and namespace
  qemu: factor out qemuDomainPrepareStorageSource()
  qemu: enable basic qcow2 data-file feature support
  tests: add qcow2 data-file tests
  docs: formatdomain: describe dataFileStore element of disk

 docs/formatdomain.rst                         |  45 +++++++-
 src/conf/domain_conf.c                        | 100 ++++++++++++++++++
 src/conf/domain_conf.h                        |  13 +++
 src/conf/schemas/domaincommon.rng             |  15 +++
 src/conf/storage_source_conf.c                |  11 ++
 src/conf/storage_source_conf.h                |   5 +
 src/qemu/qemu_block.c                         |  14 +++
 src/qemu/qemu_cgroup.c                        |  13 ++-
 src/qemu/qemu_command.c                       |   5 +
 src/qemu/qemu_domain.c                        |  50 ++++++---
 src/qemu/qemu_namespace.c                     |   7 ++
 src/security/security_dac.c                   |  27 ++++-
 src/security/security_selinux.c               |  27 ++++-
 src/security/virt-aa-helper.c                 |   4 +
 src/storage_file/storage_file_probe.c         |  78 ++++++++++----
 src/storage_file/storage_source.c             |  39 +++++++
 src/storage_file/storage_source.h             |   4 +
 .../qcow2-data-file-in.xml                    |  86 +++++++++++++++
 .../qcow2-data-file-out.xml                   |  86 +++++++++++++++
 tests/qemuxmlactivetest.c                     |   2 +
 ...sk-qcow2-datafile-store.x86_64-latest.args |  51 +++++++++
 ...isk-qcow2-datafile-store.x86_64-latest.xml |  81 ++++++++++++++
 .../disk-qcow2-datafile-store.xml             |  67 ++++++++++++
 tests/qemuxmlconftest.c                       |   1 +
 tests/virstoragetest.c                        |  98 +++++++++++++++++
 tests/virstoragetestdata/out/qcow2-data_file  |  20 ++++
 .../out/qcow2-qcow2_qcow2-qcow2-data_file     |  31 ++++++
 27 files changed, 941 insertions(+), 39 deletions(-)
 create mode 100644 tests/qemustatusxml2xmldata/qcow2-data-file-in.xml
 create mode 100644 tests/qemustatusxml2xmldata/qcow2-data-file-out.xml
 create mode 100644 tests/qemuxmlconfdata/disk-qcow2-datafile-store.x86_64-latest.args
 create mode 100644 tests/qemuxmlconfdata/disk-qcow2-datafile-store.x86_64-latest.xml
 create mode 100644 tests/qemuxmlconfdata/disk-qcow2-datafile-store.xml
 create mode 100644 tests/virstoragetestdata/out/qcow2-data_file
 create mode 100644 tests/virstoragetestdata/out/qcow2-qcow2_qcow2-qcow2-data_file

-- 
2.43.5