103 lines
2.5 KiB
Go
103 lines
2.5 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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"encoding/json"
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"fmt"
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)
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type fsFormat struct {
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Version string `json:"version"`
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}
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type xlFormat struct {
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Version string `json:"version"`
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Disks []string `json:"disks"`
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}
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type formatConfigV1 struct {
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Version string `json:"version"`
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Format string `json:"format"`
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FS *fsFormat `json:"fs,omitempty"`
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XL *xlFormat `json:"xl,omitempty"`
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}
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// FIXME: currently we don't check single exportPath which uses FS layer.
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// loadFormatXL - load XL format.json.
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func loadFormatXL(storage StorageAPI) (xl *xlFormat, err error) {
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offset := int64(0)
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r, err := storage.ReadFile(minioMetaBucket, formatConfigFile, offset)
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if err != nil {
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return nil, err
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}
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decoder := json.NewDecoder(r)
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formatXL := formatConfigV1{}
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err = decoder.Decode(&formatXL)
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if err != nil {
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return nil, err
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}
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if err = r.Close(); err != nil {
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return nil, err
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}
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if formatXL.Version != "1" {
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return nil, fmt.Errorf("Unsupported version of backend format [%s] found.", formatXL.Version)
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}
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if formatXL.Format != "xl" {
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return nil, fmt.Errorf("Unsupported backend format [%s] found.", formatXL.Format)
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}
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return formatXL.XL, nil
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}
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// checkFormat - validates if format.json file exists.
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func checkFormat(storage StorageAPI) error {
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_, err := storage.StatFile(minioMetaBucket, formatConfigFile)
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if err != nil {
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return err
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}
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return nil
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}
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// saveFormatXL - save XL format configuration
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func saveFormatXL(storage StorageAPI, xl *xlFormat) error {
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w, err := storage.CreateFile(minioMetaBucket, formatConfigFile)
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if err != nil {
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return err
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}
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formatXL := formatConfigV1{
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Version: "1",
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Format: "xl",
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XL: xl,
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}
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encoder := json.NewEncoder(w)
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err = encoder.Encode(&formatXL)
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if err != nil {
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if clErr := safeCloseAndRemove(w); clErr != nil {
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return clErr
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}
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return err
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}
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if err = w.Close(); err != nil {
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if clErr := safeCloseAndRemove(w); clErr != nil {
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return clErr
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}
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return err
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}
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return nil
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}
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