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37 lines
1.1 KiB
Go
37 lines
1.1 KiB
Go
package containerd
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import (
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"context"
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"fmt"
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"github.com/moby/moby/v2/daemon/container"
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"github.com/moby/moby/v2/daemon/internal/image"
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"github.com/pkg/errors"
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)
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// GetLayerFolders returns the layer folders from an image RootFS.
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func (i *ImageService) GetLayerFolders(img *image.Image, layer container.RWLayer, containerID string) ([]string, error) {
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if layer == nil {
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return nil, errors.New("RWLayer is unexpectedly nil")
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}
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c8dLayer, ok := layer.(*rwLayer)
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if !ok {
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return nil, fmt.Errorf("unexpected layer type: %T", layer)
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}
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mounts, err := c8dLayer.mounts(context.TODO())
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if err != nil {
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return nil, errors.Wrapf(err, "snapshotter.Mounts failed: container %s", containerID)
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}
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// This is the same logic used by the hcsshim containerd runtime shim's createInternal
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// to convert an array of Mounts into windows layers.
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// See https://github.com/microsoft/hcsshim/blob/release/0.11/cmd/containerd-shim-runhcs-v1/service_internal.go
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parentPaths, err := mounts[0].GetParentPaths()
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if err != nil {
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return nil, errors.Wrapf(err, "GetParentPaths failed: container %s", containerID)
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}
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return append(parentPaths, mounts[0].Source), nil
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}
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