When retrieving volumes, only use exact names

We should not be fuzzy matching on volume names. Docker doesn't
do  it, and it doesn't make much sense. Everything requires exact
matches for names - only IDs allow partial matches.

Fixes #3635

Signed-off-by: Matthew Heon <[email protected]>

libpod/runtime_volume.go

@@ -2,7 +2,6 @@ package libpod
 
 import (
 	"context"
-	"strings"
 
 	"github.com/containers/libpod/libpod/define"
 	"github.com/containers/libpod/libpod/events"
@@ -72,7 +71,7 @@ func (r *Runtime) RemoveVolumes(ctx context.Context, volumes []string, all, forc
 	return deletedVols, nil
 }
 
-// GetVolume retrieves a volume by its name
+// GetVolume retrieves a volume given its full name.
 func (r *Runtime) GetVolume(name string) (*Volume, error) {
 	r.lock.RLock()
 	defer r.lock.RUnlock()
@@ -82,20 +81,11 @@ func (r *Runtime) GetVolume(name string) (*Volume, error) {
 	}
 
 	vol, err := r.state.Volume(name)
-	if err == nil {
-		return vol, err
-	}
-
-	vols, err := r.GetAllVolumes()
 	if err != nil {
 		return nil, err
 	}
-	for _, v := range vols {
-		if strings.HasPrefix(v.Name(), name) {
-			return v, nil
-		}
-	}
-	return nil, errors.Errorf("unable to find volume %s", name)
+
+	return vol, nil
 }
 
 // HasVolume checks to see if a volume with the given name exists