Implement ListLayers() for the aufs, btrfs, and devicemapper drivers,
along with a unit test for them.
Stop filtering out directories with names that aren't 64-hex chars in
vfs and overlay ListLayers() implementations, which is more a convention
than a hard rule.
Have layerStore.Wipe() try to remove remaining listed layers after it
removes the layers that the layerStore knew of.
Close() a dangling ReadCloser in NaiveCreateFromTemplate.
Switch from using plain defer to using t.Cleanup() to handle deleting
layers that tests create, have the addManyLayers() test function do so
as well.
Remove vfs.CopyDir, which near as I can tell isn't referenced anywhere.
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
Modified patch of Kevin Pelzel.
Also changed ApplyDiff to take new ApplyDiffOpts Struct.
Signed-off-by: Kevin Pelzel <kevinpelzel22@gmail.com>
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Add a CreateFromTemplate() method to graph drivers, and use it instead
of a driver-oblivious diff/put method when we want to create a copy of
an image's top layer that has the same parent and which differs from the
original only in its ID maps.
This lets drivers that can quickly make an independent layer based on
another layer do something smarter than we were doing with the
driver-oblivious method. For some drivers, a native method is
dramatically faster.
Note that the driver needs to be able to do this while still exposing
just one notional layer (i.e., one link in the chain of layers for a
given container) to the higher levels of the APIs, so if the new layer
is actually a child of the template layer, that needs to remain a detail
that's private to the driver.
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
Nalin Dahyabhai