Repository navigation
Expand file tree
/
Copy pathfs-v1-metadata.go
More file actions
263 lines (220 loc) · 6.18 KB
/
Copy pathfs-v1-metadata.go
File metadata and controls
263 lines (220 loc) · 6.18 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
/*
* Minio Cloud Storage, (C) 2016, 2017, 2017 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 cmd
import (
"encoding/json"
"io"
"io/ioutil"
"os"
pathutil "path"
"sort"
"strings"
"github.com/minio/minio/pkg/lock"
"github.com/minio/minio/pkg/mimedb"
)
const (
fsMetaJSONFile = "fs.json"
fsFormatJSONFile = "format.json"
)
// A fsMetaV1 represents a metadata header mapping keys to sets of values.
type fsMetaV1 struct {
Version string `json:"version"`
Format string `json:"format"`
Minio struct {
Release string `json:"release"`
} `json:"minio"`
// Metadata map for current object `fs.json`.
Meta map[string]string `json:"meta,omitempty"`
Parts []objectPartInfo `json:"parts,omitempty"`
}
// Converts metadata to object info.
func (m fsMetaV1) ToObjectInfo(bucket, object string, fi os.FileInfo) ObjectInfo {
if len(m.Meta) == 0 {
m.Meta = make(map[string]string)
}
// Guess content-type from the extension if possible.
if m.Meta["content-type"] == "" {
if objectExt := pathutil.Ext(object); objectExt != "" {
if content, ok := mimedb.DB[strings.ToLower(strings.TrimPrefix(objectExt, "."))]; ok {
m.Meta["content-type"] = content.ContentType
}
}
}
objInfo := ObjectInfo{
Bucket: bucket,
Name: object,
}
// We set file into only if its valid.
objInfo.ModTime = timeSentinel
if fi != nil {
objInfo.ModTime = fi.ModTime()
objInfo.Size = fi.Size()
objInfo.IsDir = fi.IsDir()
}
objInfo.MD5Sum = m.Meta["md5Sum"]
objInfo.ContentType = m.Meta["content-type"]
objInfo.ContentEncoding = m.Meta["content-encoding"]
// md5Sum has already been extracted into objInfo.MD5Sum. We
// need to remove it from m.Meta to avoid it from appearing as
// part of response headers. e.g, X-Minio-* or X-Amz-*.
delete(m.Meta, "md5Sum")
// Save all the other userdefined API.
objInfo.UserDefined = m.Meta
// Success..
return objInfo
}
// ObjectPartIndex - returns the index of matching object part number.
func (m fsMetaV1) ObjectPartIndex(partNumber int) (partIndex int) {
for i, part := range m.Parts {
if partNumber == part.Number {
partIndex = i
return partIndex
}
}
return -1
}
// AddObjectPart - add a new object part in order.
func (m *fsMetaV1) AddObjectPart(partNumber int, partName string, partETag string, partSize int64) {
partInfo := objectPartInfo{
Number: partNumber,
Name: partName,
ETag: partETag,
Size: partSize,
}
// Update part info if it already exists.
for i, part := range m.Parts {
if partNumber == part.Number {
m.Parts[i] = partInfo
return
}
}
// Proceed to include new part info.
m.Parts = append(m.Parts, partInfo)
// Parts in fsMeta should be in sorted order by part number.
sort.Sort(byObjectPartNumber(m.Parts))
}
func (m *fsMetaV1) WriteTo(lk *lock.LockedFile) (n int64, err error) {
var metadataBytes []byte
metadataBytes, err = json.Marshal(m)
if err != nil {
return 0, traceError(err)
}
if err = lk.Truncate(0); err != nil {
return 0, traceError(err)
}
if _, err = lk.Write(metadataBytes); err != nil {
return 0, traceError(err)
}
// Success.
return int64(len(metadataBytes)), nil
}
func (m *fsMetaV1) ReadFrom(lk *lock.LockedFile) (n int64, err error) {
var metadataBytes []byte
fi, err := lk.Stat()
if err != nil {
return 0, traceError(err)
}
metadataBytes, err = ioutil.ReadAll(io.NewSectionReader(lk, 0, fi.Size()))
if err != nil {
return 0, traceError(err)
}
if len(metadataBytes) == 0 {
return 0, traceError(io.EOF)
}
// Decode `fs.json` into fsMeta structure.
if err = json.Unmarshal(metadataBytes, m); err != nil {
return 0, traceError(err)
}
// Success.
return int64(len(metadataBytes)), nil
}
// FS metadata constants.
const (
// FS backend meta version.
fsMetaVersion = "1.0.0"
// FS backend meta format.
fsMetaFormat = "fs"
// Add more constants here.
)
// newFSMetaV1 - initializes new fsMetaV1.
func newFSMetaV1() (fsMeta fsMetaV1) {
fsMeta = fsMetaV1{}
fsMeta.Version = fsMetaVersion
fsMeta.Format = fsMetaFormat
fsMeta.Minio.Release = ReleaseTag
return fsMeta
}
// newFSFormatV1 - initializes new formatConfigV1 with FS format info.
func newFSFormatV1() (format *formatConfigV1) {
return &formatConfigV1{
Version: "1",
Format: "fs",
FS: &fsFormat{
Version: "1",
},
}
}
// loads format.json from minioMetaBucket if it exists.
func loadFormatFS(fsPath string) (*formatConfigV1, error) {
rlk, err := lock.RLockedOpenFile(pathJoin(fsPath, minioMetaBucket, fsFormatJSONFile))
if err != nil {
if os.IsNotExist(err) {
return nil, errUnformattedDisk
}
return nil, err
}
defer rlk.Close()
formatBytes, err := ioutil.ReadAll(rlk)
if err != nil {
return nil, err
}
format := &formatConfigV1{}
if err = json.Unmarshal(formatBytes, format); err != nil {
return nil, err
}
return format, nil
}
// writes FS format (format.json) into minioMetaBucket.
func saveFormatFS(formatPath string, fsFormat *formatConfigV1) error {
metadataBytes, err := json.Marshal(fsFormat)
if err != nil {
return err
}
// fsFormatJSONFile - format.json file stored in minioMetaBucket(.minio.sys) directory.
lk, err := lock.LockedOpenFile(preparePath(formatPath), os.O_CREATE|os.O_WRONLY, 0600)
if err != nil {
return err
}
defer lk.Close()
if _, err = lk.Write(metadataBytes); err != nil {
return err
}
// Success.
return nil
}
// Return if the part info in uploadedParts and completeParts are same.
func isPartsSame(uploadedParts []objectPartInfo, completeParts []completePart) bool {
if len(uploadedParts) != len(completeParts) {
return false
}
for i := range completeParts {
if uploadedParts[i].Number != completeParts[i].PartNumber ||
uploadedParts[i].ETag != completeParts[i].ETag {
return false
}
}
return true
}