D17737: [CopyJob] Create clones in btrf/xfs mount

[Chinmoy Ranjan Pradhan]

chinmoyr created this revision.
chinmoyr added reviewers: dfaure, davidedmundson.
Herald added a project: Frameworks.
Herald added a subscriber: kde-frameworks-devel.
chinmoyr requested review of this revision.

REVISION SUMMARY
  If Copy-on-Write is enabled in a btrfs/xfs mount then create a clone otherwise
  fallback to standard copy.

TEST PLAN
  Manually copied files and verified with "btrfs filesystem du" command.
  All existing unit tests pass.

REPOSITORY
  R241 KIO

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D17737

AFFECTED FILES
  src/core/copyjob.cpp
  src/core/copyjob.h
  src/core/kmountpoint.cpp
  src/core/kmountpoint.h
  src/ioslaves/file/file_unix.cpp

To: chinmoyr, dfaure, davidedmundson
Cc: kde-frameworks-devel, michaelh, ngraham, bruns
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