blob: 61c09d85af6e847d4803e3ef74afc482353e078e (
plain)
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
|
package storage
import (
"os"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/storage/backend"
"github.com/chrislusf/seaweedfs/weed/storage/needle"
"github.com/chrislusf/seaweedfs/weed/storage/super_block"
)
func (v *Volume) maybeWriteSuperBlock() error {
datSize, _, e := v.DataBackend.GetStat()
if e != nil {
glog.V(0).Infof("failed to stat datafile %s: %v", v.DataBackend.Name(), e)
return e
}
if datSize == 0 {
v.SuperBlock.Version = needle.CurrentVersion
_, e = v.DataBackend.WriteAt(v.SuperBlock.Bytes(), 0)
if e != nil && os.IsPermission(e) {
//read-only, but zero length - recreate it!
var dataFile *os.File
if dataFile, e = os.Create(v.DataBackend.Name()); e == nil {
v.DataBackend = backend.NewDiskFile(dataFile)
if _, e = v.DataBackend.WriteAt(v.SuperBlock.Bytes(), 0); e == nil {
v.noWriteOrDelete = false
v.noWriteCanDelete = false
}
}
}
}
return e
}
func (v *Volume) readSuperBlock() (err error) {
v.SuperBlock, err = super_block.ReadSuperBlock(v.DataBackend)
return err
}
|
