Add volume state

We need to be able to track the number of times a volume has been
mounted for tmpfs/nfs/etc volumes. As such, we need a mutable
state for volumes. Add one, with the expected update/save methods
in both states.

There is backwards compat here, in that older volumes without a
state will still be accepted.

Signed-off-by: Matthew Heon <matthew.heon@pm.me>

1 files changed, 4 insertions, 0 deletions

diff --git a/libpod/state.go b/libpod/state.go
index 5d704e69a..db4667ad6 100644
--- a/libpod/state.go
+++ b/libpod/state.go
@@ -203,6 +203,10 @@ type State interface {
 	// RemoveVolume removes the specified volume.
 	// Only volumes that have no container dependencies can be removed
 	RemoveVolume(volume *Volume) error
+	// UpdateVolume updates the volume's state from the database.
+	UpdateVolume(volume *Volume) error
+	// SaveVolume saves a volume's state to the database.
+	SaveVolume(volume *Volume) error
 	// AllVolumes returns all the volumes available in the state
 	AllVolumes() ([]*Volume, error)
 }