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avoid same directory with different dir ids

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fix https://github.com/chrislusf/seaweedfs/issues/277
This commit is contained in:
chrislusf 2016-04-04 16:32:16 -07:00
parent 7dcbbaa653
commit 6876bfa685
1 changed files with 36 additions and 21 deletions
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57
go/filer/embedded_filer/directory_in_map.go
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@ -61,9 +61,7 @@ type DirectoryManagerInMap struct {
isLoading bool
}
func (dm *DirectoryManagerInMap) NewDirectoryEntryInMap(parent *DirectoryEntryInMap, name string) (d *DirectoryEntryInMap, err error) {
writeLock.Lock()
defer writeLock.Unlock()
func (dm *DirectoryManagerInMap) newDirectoryEntryInMap(parent *DirectoryEntryInMap, name string) (d *DirectoryEntryInMap, err error) {
d = &DirectoryEntryInMap{Name: name, Parent: parent, subDirectories: make(map[string]*DirectoryEntryInMap)}
var parts []string
for p := d; p != nil && p.Name != ""; p = p.Parent {
@ -90,7 +88,7 @@ func (dm *DirectoryManagerInMap) log(words ...string) {
func NewDirectoryManagerInMap(dirLogFile string) (dm *DirectoryManagerInMap, err error) {
dm = &DirectoryManagerInMap{}
//dm.Root do not use NewDirectoryEntryInMap, since dm.max will be changed
//dm.Root do not use newDirectoryEntryInMap, since dm.max will be changed
dm.Root = &DirectoryEntryInMap{subDirectories: make(map[string]*DirectoryEntryInMap)}
if dm.logFile, err = os.OpenFile(dirLogFile, os.O_RDWR|os.O_CREATE, 0644); err != nil {
return nil, fmt.Errorf("cannot write directory log file %s: %v", dirLogFile, err)
@ -192,18 +190,28 @@ func (dm *DirectoryManagerInMap) loadDirectory(dirPath string, dirId filer.Direc
for i := 1; i < len(parts); i++ {
sub, ok := dir.getChild(parts[i])
if !ok {
if i != len(parts)-1 {
return fmt.Errorf("%s should be created after parent %s", dirPath, parts[i])
writeLock.Lock()
if sub2, createdByOtherThread := dir.getChild(parts[i]); createdByOtherThread {
sub = sub2
} else {
if i != len(parts)-1 {
writeLock.Unlock()
return fmt.Errorf("%s should be created after parent %s", dirPath, parts[i])
}
var err error
sub, err = dm.newDirectoryEntryInMap(dir, parts[i])
if err != nil {
writeLock.Unlock()
return err
}
if sub.Id != dirId {
writeLock.Unlock()
// the dir.log should be the same order as in-memory directory id
return fmt.Errorf("%s should be have id %v instead of %v", dirPath, sub.Id, dirId)
}
dir.addChild(parts[i], sub)
}
var err error
sub, err = dm.NewDirectoryEntryInMap(dir, parts[i])
if err != nil {
return err
}
if sub.Id != dirId {
return fmt.Errorf("%s should be have id %v instead of %v", dirPath, sub.Id, dirId)
}
dir.addChild(parts[i], sub)
writeLock.Unlock()
}
dir = sub
}
@ -220,13 +228,20 @@ func (dm *DirectoryManagerInMap) makeDirectory(dirPath string) (dir *DirectoryEn
for i := 1; i < len(parts); i++ {
sub, ok := dir.getChild(parts[i])
if !ok {
var err error
sub, err = dm.NewDirectoryEntryInMap(dir, parts[i])
if err != nil {
return nil, false
writeLock.Lock()
if sub2, createdByOtherThread := dir.getChild(parts[i]); createdByOtherThread {
sub = sub2
} else {
var err error
sub, err = dm.newDirectoryEntryInMap(dir, parts[i])
if err != nil {
writeLock.Unlock()
return nil, false
}
dir.addChild(parts[i], sub)
created = true
}
dir.addChild(parts[i], sub)
created = true
writeLock.Unlock()
}
dir = sub
}