This moves both the Mount type and mountinfo into a single mount
package.
This also opens up the root of the repo to hold the containerd client
implementation.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
To allow the querying of usage for snapshots, we define a new method on
the snapshotter to query the resources in use by a single snapshot.
Conversely, it can be said that if the snapshot was deleted, the
reported amount of usage would be recovered.
There are few problems with this model in the implementation of btrfs
that need to be worked out. In btrfs, it is hard to resolve the amount
of data usage with the use of quotas but these may report valuables that
are incompatible with the model.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
When starting up a snapshot driver on subsequent runs, the
mkdir call will return an exist error, this can be safely
ignored.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Ensure undo failures are logged in a consistent way.
Remove created subvolume on commit failure on create.
Ensure that removed value get logged on delete failure.
Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
Updates the btrfs snapshotter to meet the interface and current tests.
Mostly, we merge the keyspace into a common index. Like with the overlay
driver, we will still need to do more verification work to ensure
idempotence of key collisions.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
We now include btrfs in the snapshot driver test suite. This includes
the addition of parent links and name hashing into the btrfs driver.
We'll probably endup replacing this with a common metadata store, as
these relationships are generally identical between implementations.
A small bug was discovered in the delete implementation in the course
testing, so the btrfs package has been updated with a fix.
The overlay driver was modified accordingly with the btrfs driver to use
`Driver` as the exported type of each driver packge.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
Also remove the target from the Mount struct because it should not be
used at all. The target can be variable and set by a caller, not by the
snapshot drivers.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
