mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-22 16:29:18 +00:00
97 lines
2.8 KiB
Go
97 lines
2.8 KiB
Go
/**
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# Copyright (c) NVIDIA CORPORATION. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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**/
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package transform
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import (
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"os"
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"path/filepath"
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"sort"
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"strings"
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"tags.cncf.io/container-device-interface/specs-go"
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)
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type sorter struct{}
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var _ Transformer = (*sorter)(nil)
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// NewSorter creates a transformer that sorts container edits.
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func NewSorter() Transformer {
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return nil
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}
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// Transform sorts the entities in the specified CDI specification.
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func (d sorter) Transform(spec *specs.Spec) error {
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if spec == nil {
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return nil
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}
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if err := d.transformEdits(&spec.ContainerEdits); err != nil {
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return err
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}
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var updatedDevices []specs.Device
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for _, device := range spec.Devices {
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device := device
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if err := d.transformEdits(&device.ContainerEdits); err != nil {
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return err
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}
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updatedDevices = append(updatedDevices, device)
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}
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spec.Devices = d.sortDevices(updatedDevices)
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return nil
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}
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func (d sorter) transformEdits(edits *specs.ContainerEdits) error {
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edits.DeviceNodes = d.sortDeviceNodes(edits.DeviceNodes)
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edits.Mounts = d.sortMounts(edits.Mounts)
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return nil
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}
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func (d sorter) sortDevices(devices []specs.Device) []specs.Device {
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sort.Slice(devices, func(i, j int) bool {
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return devices[i].Name < devices[j].Name
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})
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return devices
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}
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// sortDeviceNodes sorts the specified device nodes by container path.
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// If two device nodes have the same container path, the host path is used to break ties.
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func (d sorter) sortDeviceNodes(entities []*specs.DeviceNode) []*specs.DeviceNode {
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sort.Slice(entities, func(i, j int) bool {
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ip := strings.Count(filepath.Clean(entities[i].Path), string(os.PathSeparator))
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jp := strings.Count(filepath.Clean(entities[j].Path), string(os.PathSeparator))
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if ip == jp {
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return entities[i].Path < entities[j].Path
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}
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return ip < jp
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})
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return entities
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}
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// sortMounts sorts the specified mounts by container path.
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// If two mounts have the same mount path, the host path is used to break ties.
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func (d sorter) sortMounts(entities []*specs.Mount) []*specs.Mount {
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sort.Slice(entities, func(i, j int) bool {
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ip := strings.Count(filepath.Clean(entities[i].ContainerPath), string(os.PathSeparator))
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jp := strings.Count(filepath.Clean(entities[j].ContainerPath), string(os.PathSeparator))
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if ip == jp {
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return entities[i].ContainerPath < entities[j].ContainerPath
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}
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return ip < jp
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})
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return entities
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}
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