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simplify file handle management

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This commit is contained in:
Chris Lu 2020-04-08 12:50:20 -07:00
parent dc08e4098f
commit bd56172b82
1 changed files with 11 additions and 25 deletions
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36
weed/filesys/wfs.go
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@ -54,9 +54,8 @@ type WFS struct {
listDirectoryEntriesCache *ccache.Cache
// contains all open handles, protected by handlesLock
handlesLock sync.Mutex
handles []*FileHandle
pathToHandleIndex map[util.FullPath]int
handlesLock sync.Mutex
handles map[uint64]*FileHandle
bufPool sync.Pool
@ -76,7 +75,7 @@ func NewSeaweedFileSystem(option *Option) *WFS {
wfs := &WFS{
option: option,
listDirectoryEntriesCache: ccache.New(ccache.Configure().MaxSize(option.DirListCacheLimit * 3).ItemsToPrune(100)),
pathToHandleIndex: make(map[util.FullPath]int),
handles: make(map[uint64]*FileHandle),
bufPool: sync.Pool{
New: func() interface{} {
return make([]byte, option.ChunkSizeLimit)
@ -117,26 +116,15 @@ func (wfs *WFS) AcquireHandle(file *File, uid, gid uint32) (fileHandle *FileHand
wfs.handlesLock.Lock()
defer wfs.handlesLock.Unlock()
index, found := wfs.pathToHandleIndex[fullpath]
if found && wfs.handles[index] != nil {
glog.V(2).Infoln(fullpath, "found fileHandle id", index)
return wfs.handles[index]
inodeId := file.fullpath().AsInode()
existingHandle, found := wfs.handles[inodeId]
if found && existingHandle != nil {
return existingHandle
}
fileHandle = newFileHandle(file, uid, gid)
for i, h := range wfs.handles {
if h == nil {
wfs.handles[i] = fileHandle
fileHandle.handle = uint64(i)
wfs.pathToHandleIndex[fullpath] = i
glog.V(4).Infof("%s reuse fh %d", fullpath, fileHandle.handle)
return
}
}
wfs.handles = append(wfs.handles, fileHandle)
fileHandle.handle = uint64(len(wfs.handles) - 1)
wfs.pathToHandleIndex[fullpath] = int(fileHandle.handle)
wfs.handles[inodeId] = fileHandle
fileHandle.handle = inodeId
glog.V(4).Infof("%s new fh %d", fullpath, fileHandle.handle)
return
@ -147,10 +135,8 @@ func (wfs *WFS) ReleaseHandle(fullpath util.FullPath, handleId fuse.HandleID) {
defer wfs.handlesLock.Unlock()
glog.V(4).Infof("%s ReleaseHandle id %d current handles length %d", fullpath, handleId, len(wfs.handles))
delete(wfs.pathToHandleIndex, fullpath)
if int(handleId) < len(wfs.handles) {
wfs.handles[int(handleId)] = nil
}
delete(wfs.handles, fullpath.AsInode())
return
}