Adds specific disk file classes for EC policy types.
The new ECDiskFile and ECDiskFileWriter classes are used by the
ECDiskFileManager.
ECDiskFileManager is registered with the DiskFileRouter for use with
EC_POLICY type policies.
Refactors diskfile tests into BaseDiskFileMixin and BaseDiskFileManagerMixin
classes which are then extended in subclasses for the legacy
replication-type DiskFile* and ECDiskFile* classes.
Refactor to prefer use of a policy instance reference over a policy_index
int to refer to a policy.
Add additional verification to DiskFileManager.get_dev_path to validate the
device root with common.constraints.check_dir, even when mount_check is
disabled for use in on a virtual swift-all-in-one.
Co-Authored-By: Thiago da Silva <thiago@redhat.com>
Co-Authored-By: John Dickinson <me@not.mn>
Co-Authored-By: Clay Gerrard <clay.gerrard@gmail.com>
Co-Authored-By: Tushar Gohad <tushar.gohad@intel.com>
Co-Authored-By: Paul Luse <paul.e.luse@intel.com>
Co-Authored-By: Samuel Merritt <sam@swiftstack.com>
Co-Authored-By: Christian Schwede <christian.schwede@enovance.com>
Co-Authored-By: Yuan Zhou <yuan.zhou@intel.com>
Change-Id: I22f915160dc67a9e18f4738c1ddf068344e8ad5d