mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-25 13:35:00 +00:00
95 lines
2.3 KiB
Go
95 lines
2.3 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 device
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import (
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"strconv"
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"strings"
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"github.com/google/uuid"
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)
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// Identifier can be used to refer to a GPU or MIG device.
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// This includes a device index or UUID.
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type Identifier string
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// IsGpuIndex checks if an identifier is a full GPU index
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func (i Identifier) IsGpuIndex() bool {
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if _, err := strconv.ParseUint(string(i), 10, 0); err != nil {
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return false
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}
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return true
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}
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// IsMigIndex checks if an identifier is a MIG index
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func (i Identifier) IsMigIndex() bool {
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split := strings.Split(string(i), ":")
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if len(split) != 2 {
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return false
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}
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for _, s := range split {
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if !Identifier(s).IsGpuIndex() {
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return false
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}
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}
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return true
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}
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// IsUUID checks if an identifier is a UUID
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func (i Identifier) IsUUID() bool {
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return i.IsGpuUUID() || i.IsMigUUID()
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}
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// IsGpuUUID checks if an identifier is a GPU UUID
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// A GPU UUID must be of the form GPU-b1028956-cfa2-0990-bf4a-5da9abb51763
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func (i Identifier) IsGpuUUID() bool {
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if !strings.HasPrefix(string(i), "GPU-") {
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return false
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}
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_, err := uuid.Parse(strings.TrimPrefix(string(i), "GPU-"))
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return err == nil
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}
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// IsMigUUID checks if an identifier is a MIG UUID
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// A MIG UUID can be of one of two forms:
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// - MIG-b1028956-cfa2-0990-bf4a-5da9abb51763
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// - MIG-GPU-b1028956-cfa2-0990-bf4a-5da9abb51763/3/0
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func (i Identifier) IsMigUUID() bool {
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if !strings.HasPrefix(string(i), "MIG-") {
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return false
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}
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suffix := strings.TrimPrefix(string(i), "MIG-")
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_, err := uuid.Parse(suffix)
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if err == nil {
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return true
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}
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split := strings.Split(suffix, "/")
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if len(split) != 3 {
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return false
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}
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if !Identifier(split[0]).IsGpuUUID() {
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return false
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}
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for _, s := range split[1:] {
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_, err := strconv.ParseUint(s, 10, 0)
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if err != nil {
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return false
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}
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}
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return true
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}
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