mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-07-03 15:46:44 +02:00
113 lines
2.9 KiB
Go
113 lines
2.9 KiB
Go
package filesys
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import (
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"bazil.org/fuse/fs"
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/karlseguin/ccache"
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"sync"
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"bazil.org/fuse"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/util"
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)
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type WFS struct {
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filerGrpcAddress string
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listDirectoryEntriesCache *ccache.Cache
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collection string
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replication string
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ttlSec int32
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chunkSizeLimit int64
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// contains all open handles
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handles []*FileHandle
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pathToHandleIndex map[string]int
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pathToHandleLock sync.Mutex
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}
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func NewSeaweedFileSystem(filerGrpcAddress string, collection string, replication string, ttlSec int32, chunkSizeLimitMB int) *WFS {
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return &WFS{
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filerGrpcAddress: filerGrpcAddress,
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listDirectoryEntriesCache: ccache.New(ccache.Configure().MaxSize(6000).ItemsToPrune(100)),
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collection: collection,
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replication: replication,
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ttlSec: ttlSec,
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chunkSizeLimit: int64(chunkSizeLimitMB) * 1024 * 1024,
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pathToHandleIndex: make(map[string]int),
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}
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}
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func (wfs *WFS) Root() (fs.Node, error) {
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return &Dir{Path: "/", wfs: wfs}, nil
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}
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func (wfs *WFS) withFilerClient(fn func(filer_pb.SeaweedFilerClient) error) error {
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grpcConnection, err := util.GrpcDial(wfs.filerGrpcAddress)
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if err != nil {
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return fmt.Errorf("fail to dial %s: %v", wfs.filerGrpcAddress, err)
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}
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defer grpcConnection.Close()
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client := filer_pb.NewSeaweedFilerClient(grpcConnection)
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return fn(client)
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}
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func (wfs *WFS) AcquireHandle(file *File, uid, gid uint32) (handle *FileHandle) {
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wfs.pathToHandleLock.Lock()
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defer wfs.pathToHandleLock.Unlock()
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fullpath := file.fullpath()
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index, found := wfs.pathToHandleIndex[fullpath]
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if found && wfs.handles[index] != nil {
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glog.V(4).Infoln(fullpath, "found handle id", index)
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return wfs.handles[index]
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}
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// create a new handler
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handle = &FileHandle{
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f: file,
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dirtyPages: newDirtyPages(file),
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Uid: uid,
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Gid: gid,
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}
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if found && wfs.handles[index] != nil {
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glog.V(4).Infoln(fullpath, "reuse previous handle id", index)
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wfs.handles[index] = handle
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handle.handle = uint64(index)
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return
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}
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for i, h := range wfs.handles {
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if h == nil {
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wfs.handles[i] = handle
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handle.handle = uint64(i)
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wfs.pathToHandleIndex[fullpath] = i
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glog.V(4).Infoln(fullpath, "reuse handle id", handle.handle)
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return
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}
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}
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wfs.handles = append(wfs.handles, handle)
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handle.handle = uint64(len(wfs.handles) - 1)
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glog.V(4).Infoln(fullpath, "new handle id", handle.handle)
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wfs.pathToHandleIndex[fullpath] = int(handle.handle)
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return
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}
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func (wfs *WFS) ReleaseHandle(handleId fuse.HandleID) {
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wfs.pathToHandleLock.Lock()
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defer wfs.pathToHandleLock.Unlock()
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glog.V(4).Infoln("releasing handle id", handleId, "current handles lengh", len(wfs.handles))
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if int(handleId) < len(wfs.handles) {
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wfs.handles[int(handleId)] = nil
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}
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return
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}
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