57 lines
1.5 KiB
Go
57 lines
1.5 KiB
Go
//go:build linux
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// +build linux
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package libpod
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import (
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"github.com/containers/podman/v4/libpod/define"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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)
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// replaceNetNS handle network namespace transitions after updating a
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// container's state.
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func replaceNetNS(netNSPath string, ctr *Container, newState *ContainerState) error {
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if netNSPath != "" {
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// Check if the container's old state has a good netns
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if ctr.state.NetNS != nil && netNSPath == ctr.state.NetNS.Path() {
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newState.NetNS = ctr.state.NetNS
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} else {
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// Close the existing namespace.
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// Whoever removed it from the database already tore it down.
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if err := ctr.runtime.closeNetNS(ctr); err != nil {
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return err
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}
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// Open the new network namespace
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ns, err := joinNetNS(netNSPath)
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if err == nil {
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newState.NetNS = ns
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} else {
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if ctr.ensureState(define.ContainerStateRunning, define.ContainerStatePaused) {
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return errors.Wrapf(err, "error joining network namespace of container %s", ctr.ID())
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}
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logrus.Errorf("Joining network namespace for container %s: %v", ctr.ID(), err)
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ctr.state.NetNS = nil
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}
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}
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} else {
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// The container no longer has a network namespace
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// Close the old one, whoever removed it from the DB should have
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// cleaned it up already.
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if err := ctr.runtime.closeNetNS(ctr); err != nil {
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return err
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}
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}
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return nil
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}
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// getNetNSPath retrieves the netns path to be stored in the database
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func getNetNSPath(ctr *Container) string {
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if ctr.state.NetNS != nil {
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return ctr.state.NetNS.Path()
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}
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return ""
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}
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