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package filesys
import ( "context" "fmt" "mime" "path" "time"
"github.com/chrislusf/seaweedfs/weed/filer2" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/operation" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" "github.com/gabriel-vasile/mimetype" "github.com/seaweedfs/fuse" "github.com/seaweedfs/fuse/fs" "google.golang.org/grpc" )
type FileHandle struct { // cache file has been written to
dirtyPages *ContinuousDirtyPages contentType string dirtyMetadata bool handle uint64
f *File RequestId fuse.RequestID // unique ID for request
NodeId fuse.NodeID // file or directory the request is about
Uid uint32 // user ID of process making request
Gid uint32 // group ID of process making request
}
func newFileHandle(file *File, uid, gid uint32) *FileHandle { return &FileHandle{ f: file, dirtyPages: newDirtyPages(file), Uid: uid, Gid: gid, } }
var _ = fs.Handle(&FileHandle{})
// var _ = fs.HandleReadAller(&FileHandle{})
var _ = fs.HandleReader(&FileHandle{}) var _ = fs.HandleFlusher(&FileHandle{}) var _ = fs.HandleWriter(&FileHandle{}) var _ = fs.HandleReleaser(&FileHandle{})
func (fh *FileHandle) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadResponse) error {
glog.V(4).Infof("%s read fh %d: [%d,%d)", fh.f.fullpath(), fh.handle, req.Offset, req.Offset+int64(req.Size))
// this value should come from the filer instead of the old f
if len(fh.f.entry.Chunks) == 0 { glog.V(1).Infof("empty fh %v/%v", fh.f.dir.Path, fh.f.Name) return nil }
buff := make([]byte, req.Size)
if fh.f.entryViewCache == nil { fh.f.entryViewCache = filer2.NonOverlappingVisibleIntervals(fh.f.entry.Chunks) }
chunkViews := filer2.ViewFromVisibleIntervals(fh.f.entryViewCache, req.Offset, req.Size)
totalRead, err := filer2.ReadIntoBuffer(ctx, fh.f.wfs, fh.f.fullpath(), buff, chunkViews, req.Offset)
resp.Data = buff[:totalRead]
return err }
// Write to the file handle
func (fh *FileHandle) Write(ctx context.Context, req *fuse.WriteRequest, resp *fuse.WriteResponse) error {
// write the request to volume servers
glog.V(4).Infof("%+v/%v write fh %d: [%d,%d)", fh.f.dir.Path, fh.f.Name, fh.handle, req.Offset, req.Offset+int64(len(req.Data)))
chunks, err := fh.dirtyPages.AddPage(ctx, req.Offset, req.Data) if err != nil { glog.Errorf("%+v/%v write fh %d: [%d,%d): %v", fh.f.dir.Path, fh.f.Name, fh.handle, req.Offset, req.Offset+int64(len(req.Data)), err) return fmt.Errorf("write %s/%s at [%d,%d): %v", fh.f.dir.Path, fh.f.Name, req.Offset, req.Offset+int64(len(req.Data)), err) }
resp.Size = len(req.Data)
if req.Offset == 0 { // detect mime type
var possibleExt string fh.contentType, possibleExt = mimetype.Detect(req.Data) if ext := path.Ext(fh.f.Name); ext != possibleExt { fh.contentType = mime.TypeByExtension(ext) }
fh.dirtyMetadata = true }
fh.f.addChunks(chunks)
if len(chunks) > 0 { fh.dirtyMetadata = true }
return nil }
func (fh *FileHandle) Release(ctx context.Context, req *fuse.ReleaseRequest) error {
glog.V(4).Infof("%v release fh %d", fh.f.fullpath(), fh.handle)
fh.dirtyPages.releaseResource()
fh.f.wfs.ReleaseHandle(fh.f.fullpath(), fuse.HandleID(fh.handle))
fh.f.isOpen = false
return nil }
func (fh *FileHandle) Flush(ctx context.Context, req *fuse.FlushRequest) error { // fflush works at fh level
// send the data to the OS
glog.V(4).Infof("%s fh %d flush %v", fh.f.fullpath(), fh.handle, req)
chunk, err := fh.dirtyPages.FlushToStorage(ctx) if err != nil { glog.Errorf("flush %s/%s: %v", fh.f.dir.Path, fh.f.Name, err) return fmt.Errorf("flush %s/%s: %v", fh.f.dir.Path, fh.f.Name, err) }
fh.f.addChunk(chunk)
if !fh.dirtyMetadata { return nil }
return fh.f.wfs.WithFilerClient(ctx, func(client filer_pb.SeaweedFilerClient) error {
if fh.f.entry.Attributes != nil { fh.f.entry.Attributes.Mime = fh.contentType fh.f.entry.Attributes.Uid = req.Uid fh.f.entry.Attributes.Gid = req.Gid fh.f.entry.Attributes.Mtime = time.Now().Unix() fh.f.entry.Attributes.Crtime = time.Now().Unix() fh.f.entry.Attributes.FileMode = uint32(0770) }
request := &filer_pb.CreateEntryRequest{ Directory: fh.f.dir.Path, Entry: fh.f.entry, }
//glog.V(1).Infof("%s/%s set chunks: %v", fh.f.dir.Path, fh.f.Name, len(fh.f.entry.Chunks))
//for i, chunk := range fh.f.entry.Chunks {
// glog.V(4).Infof("%s/%s chunks %d: %v [%d,%d)", fh.f.dir.Path, fh.f.Name, i, chunk.FileId, chunk.Offset, chunk.Offset+int64(chunk.Size))
//}
chunks, garbages := filer2.CompactFileChunks(fh.f.entry.Chunks) fh.f.entry.Chunks = chunks // fh.f.entryViewCache = nil
fh.f.wfs.deleteFileChunks(ctx, garbages)
if _, err := client.CreateEntry(ctx, request); err != nil { return fmt.Errorf("update fh: %v", err) }
return nil }) }
func deleteFileIds(ctx context.Context, grpcDialOption grpc.DialOption, client filer_pb.SeaweedFilerClient, fileIds []string) error {
var vids []string for _, fileId := range fileIds { vids = append(vids, filer2.VolumeId(fileId)) }
lookupFunc := func(vids []string) (map[string]operation.LookupResult, error) {
m := make(map[string]operation.LookupResult)
glog.V(4).Infof("remove file lookup volume id locations: %v", vids) resp, err := client.LookupVolume(ctx, &filer_pb.LookupVolumeRequest{ VolumeIds: vids, }) if err != nil { return m, err }
for _, vid := range vids { lr := operation.LookupResult{ VolumeId: vid, Locations: nil, } locations := resp.LocationsMap[vid] for _, loc := range locations.Locations { lr.Locations = append(lr.Locations, operation.Location{ Url: loc.Url, PublicUrl: loc.PublicUrl, }) } m[vid] = lr }
return m, err }
_, err := operation.DeleteFilesWithLookupVolumeId(grpcDialOption, fileIds, lookupFunc)
return err }
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