mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-22 16:29:18 +00:00
9c3c8e038a
This change adds a cache to the mounts type. This means that if called to get a list of folders, for example, the result is reused instead of recalculated. This also avoids duplicate logging. Signed-off-by: Evan Lezar <elezar@nvidia.com>
86 lines
2.0 KiB
Go
86 lines
2.0 KiB
Go
/*
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# Copyright (c) 2021, 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 discover
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import (
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"fmt"
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"sync"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/lookup"
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"github.com/sirupsen/logrus"
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)
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// mounts is a generic discoverer for Mounts. It is customized by specifying the
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// required entities as a list and a Locator that is used to find the target mounts
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// based on the entry in the list.
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type mounts struct {
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None
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logger *logrus.Logger
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lookup lookup.Locator
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required []string
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sync.Mutex
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cache []Mount
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}
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var _ Discover = (*mounts)(nil)
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func (d *mounts) Mounts() ([]Mount, error) {
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if d.lookup == nil {
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return nil, fmt.Errorf("no lookup defined")
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}
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if d.cache != nil {
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d.logger.Debugf("returning cached mounts")
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return d.cache, nil
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}
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d.Lock()
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defer d.Unlock()
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paths := make(map[string]bool)
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for _, candidate := range d.required {
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d.logger.Debugf("Locating %v", candidate)
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located, err := d.lookup.Locate(candidate)
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if err != nil {
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d.logger.Warnf("Could not locate %v: %v", candidate, err)
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continue
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}
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if len(located) == 0 {
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d.logger.Warnf("Missing %v", candidate)
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continue
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}
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d.logger.Debugf("Located %v as %v", candidate, located)
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for _, p := range located {
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paths[p] = true
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}
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}
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var mounts []Mount
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for path := range paths {
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d.logger.Infof("Selecting %v", path)
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mount := Mount{
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Path: path,
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}
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mounts = append(mounts, mount)
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}
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d.cache = mounts
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return mounts, nil
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}
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