prevent unpredictable results with network create|remove

due to a lack of "locking" on cni operations, we could get ourselves in trouble when doing rapid creation or removal of networks.  added a simple file lock to deal with the collision and because it is not considered a performent path, use of the file lock should be ok.  if proven otherwise in the future, some generic shared memory lock should be implemented for libpod and also used here.

moved pkog/network to libpod/network because libpod is now being pulled into the package and it has therefore lost its generic nature. this will make it easier to absorb into libpod as we try to make the network closer to core operations.

Fixes: #7807

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

2 files changed, 1 insertions, 5 deletions

diff --git a/cmd/podman/networks/create.go b/cmd/podman/networks/create.go
index 68a577ae1..17f39bd8b 100644
--- a/cmd/podman/networks/create.go
+++ b/cmd/podman/networks/create.go
@@ -7,7 +7,6 @@ import (
 	"github.com/containers/podman/v2/cmd/podman/registry"
 	"github.com/containers/podman/v2/libpod/define"
 	"github.com/containers/podman/v2/pkg/domain/entities"
-	"github.com/containers/podman/v2/pkg/network"
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
 )
@@ -56,9 +55,6 @@ func networkCreate(cmd *cobra.Command, args []string) error {
 	var (
 		name string
 	)
-	if err := network.IsSupportedDriver(networkCreateOptions.Driver); err != nil {
-		return err
-	}
 	if len(args) > 0 {
 		if !define.NameRegex.MatchString(args[0]) {
 			return define.RegexError
diff --git a/cmd/podman/networks/list.go b/cmd/podman/networks/list.go
index b6fb2bb80..c53f50c9f 100644
--- a/cmd/podman/networks/list.go
+++ b/cmd/podman/networks/list.go
@@ -10,8 +10,8 @@ import (
 
 	"github.com/containers/podman/v2/cmd/podman/registry"
 	"github.com/containers/podman/v2/cmd/podman/validate"
+	"github.com/containers/podman/v2/libpod/network"
 	"github.com/containers/podman/v2/pkg/domain/entities"
-	"github.com/containers/podman/v2/pkg/network"
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
 )