Classify blobs into three categories based on size.
Use a very limited number of mount attempts and no existence check for
small blobs. Use more attempts for bigger blobs.
Also remember blob associations during layer existence check.
Blob digests are now checked in the target repository from newest to
latest. If the blob exists and the metadata entry does not, it will be
created. If the blob is not found, the metadata entry will be removed.
Signed-off-by: Michal Minář <miminar@redhat.com>
Upstream-commit: 81f7b1f1e50252e9fdd52111f0899d59f19ecb87
Component: engine
225daecbb2