enhance podman network rm

when removing a podman network, we need to make sure we delete the
network interface if one was ever created (by running a container).
also, when removing networks, we check if any containers are using the
network.  if they are, we error out unless the user provides a 'force'
option which will remove the containers in question.

Signed-off-by: baude <bbaude@redhat.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/pkg/network/files.go b/pkg/network/files.go
index 80fde5e17..d55ec2dfd 100644
--- a/pkg/network/files.go
+++ b/pkg/network/files.go
@@ -86,6 +86,7 @@ func GetNetworksFromFilesystem() ([]*allocator.Net, error) {
 					return nil, err
 				}
 				cniNetworks = append(cniNetworks, &ipamConf)
+				break
 			}
 		}
 	}
@@ -105,3 +106,26 @@ func GetNetworkNamesFromFileSystem() ([]string, error) {
 	}
 	return networkNames, nil
 }
+
+// GetInterfaceNameFromConfig returns the interface name for the bridge plugin
+func GetInterfaceNameFromConfig(path string) (string, error) {
+	var name string
+	conf, err := libcni.ConfListFromFile(path)
+	if err != nil {
+		return "", err
+	}
+	for _, cniplugin := range conf.Plugins {
+		if cniplugin.Network.Type == "bridge" {
+			plugin := make(map[string]interface{})
+			if err := json.Unmarshal(cniplugin.Bytes, &plugin); err != nil {
+				return "", err
+			}
+			name = plugin["bridge"].(string)
+			break
+		}
+	}
+	if len(name) == 0 {
+		return "", errors.New("unable to find interface name for network")
+	}
+	return name, nil
+}