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minio/xl-erasure-v1-metadata.go

61 lines
1.6 KiB

/*
* Minio Cloud Storage, (C) 2016 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package main
import (
"encoding/json"
"io"
"time"
)
// A xlMetaV1 represents a metadata header mapping keys to sets of values.
type xlMetaV1 struct {
Version string `json:"version"`
Stat struct {
Size int64 `json:"size"`
ModTime time.Time `json:"modTime"`
Version int64 `json:"version"`
} `json:"stat"`
Erasure struct {
DataBlocks int `json:"data"`
ParityBlocks int `json:"parity"`
BlockSize int64 `json:"blockSize"`
} `json:"erasure"`
Minio struct {
Release string `json:"release"`
} `json:"minio"`
}
// Write writes a metadata in wire format.
func (m xlMetaV1) Write(writer io.Writer) error {
metadataBytes, err := json.Marshal(m)
if err != nil {
return err
}
_, err = writer.Write(metadataBytes)
return err
}
// xlMetaV1Decode - file metadata decode.
func xlMetaV1Decode(reader io.Reader) (metadata xlMetaV1, err error) {
decoder := json.NewDecoder(reader)
// Unmarshalling failed, file possibly corrupted.
if err = decoder.Decode(&metadata); err != nil {
return xlMetaV1{}, err
}
return metadata, nil
}