mirror of https://github.com/minio/minio.git
102 lines
2.7 KiB
Go
102 lines
2.7 KiB
Go
/*
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* Minio Cloud Storage, (C) 2016 Minio, Inc.
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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 main
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import (
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"strings"
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"sync"
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)
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// Common initialization needed for both object layers.
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func initObjectLayer(storageDisks ...StorageAPI) error {
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// This happens for the first time, but keep this here since this
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// is the only place where it can be made expensive optimizing all
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// other calls. Create minio meta volume, if it doesn't exist yet.
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var wg = &sync.WaitGroup{}
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// Initialize errs to collect errors inside go-routine.
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var errs = make([]error, len(storageDisks))
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// Initialize all disks in parallel.
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for index, disk := range storageDisks {
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wg.Add(1)
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go func(index int, disk StorageAPI) {
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// Indicate this wait group is done.
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defer wg.Done()
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// Attempt to create `.minio`.
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err := disk.MakeVol(minioMetaBucket)
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if err != nil {
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if err != errVolumeExists && err != errDiskNotFound {
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errs[index] = err
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return
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}
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}
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// Cleanup all temp entries upon start.
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err = cleanupDir(disk, minioMetaBucket, tmpMetaPrefix)
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if err != nil {
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errs[index] = err
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return
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}
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errs[index] = nil
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}(index, disk)
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}
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// Wait for all cleanup to finish.
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wg.Wait()
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// Return upon first error.
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for _, err := range errs {
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if err == nil {
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continue
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}
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return toObjectErr(err, minioMetaBucket, tmpMetaPrefix)
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}
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// Return success here.
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return nil
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}
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// Cleanup a directory recursively.
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func cleanupDir(storage StorageAPI, volume, dirPath string) error {
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var delFunc func(string) error
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// Function to delete entries recursively.
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delFunc = func(entryPath string) error {
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if !strings.HasSuffix(entryPath, slashSeparator) {
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// No trailing "/" means that this is a file which can be deleted.
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return storage.DeleteFile(volume, entryPath)
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}
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// If it's a directory, list and call delFunc() for each entry.
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entries, err := storage.ListDir(volume, entryPath)
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if err != nil {
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if err == errFileNotFound {
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// if dirPath prefix never existed.
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return nil
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}
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return err
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}
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for _, entry := range entries {
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err = delFunc(pathJoin(entryPath, entry))
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if 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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return delFunc(retainSlash(pathJoin(dirPath)))
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}
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