mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
173 lines
4.7 KiB
Go
173 lines
4.7 KiB
Go
package filesys
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import (
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"context"
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"fmt"
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"mime"
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"path"
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"time"
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"github.com/chrislusf/seaweedfs/weed/filer2"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/gabriel-vasile/mimetype"
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"github.com/seaweedfs/fuse"
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"github.com/seaweedfs/fuse/fs"
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)
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type FileHandle struct {
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// cache file has been written to
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dirtyPages *ContinuousDirtyPages
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contentType string
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dirtyMetadata bool
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handle uint64
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f *File
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RequestId fuse.RequestID // unique ID for request
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NodeId fuse.NodeID // file or directory the request is about
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Uid uint32 // user ID of process making request
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Gid uint32 // group ID of process making request
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}
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func newFileHandle(file *File, uid, gid uint32) *FileHandle {
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return &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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}
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var _ = fs.Handle(&FileHandle{})
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// var _ = fs.HandleReadAller(&FileHandle{})
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var _ = fs.HandleReader(&FileHandle{})
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var _ = fs.HandleFlusher(&FileHandle{})
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var _ = fs.HandleWriter(&FileHandle{})
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var _ = fs.HandleReleaser(&FileHandle{})
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func (fh *FileHandle) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadResponse) error {
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glog.V(4).Infof("%s read fh %d: [%d,%d)", fh.f.fullpath(), fh.handle, req.Offset, req.Offset+int64(req.Size))
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// this value should come from the filer instead of the old f
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if len(fh.f.entry.Chunks) == 0 {
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glog.V(1).Infof("empty fh %v/%v", fh.f.dir.Path, fh.f.Name)
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return nil
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}
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buff := make([]byte, req.Size)
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if fh.f.entryViewCache == nil {
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fh.f.entryViewCache = filer2.NonOverlappingVisibleIntervals(fh.f.entry.Chunks)
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}
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chunkViews := filer2.ViewFromVisibleIntervals(fh.f.entryViewCache, req.Offset, req.Size)
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totalRead, err := filer2.ReadIntoBuffer(ctx, fh.f.wfs, fh.f.fullpath(), buff, chunkViews, req.Offset)
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resp.Data = buff[:totalRead]
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return err
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}
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// Write to the file handle
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func (fh *FileHandle) Write(ctx context.Context, req *fuse.WriteRequest, resp *fuse.WriteResponse) error {
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// write the request to volume servers
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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)))
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chunks, err := fh.dirtyPages.AddPage(ctx, req.Offset, req.Data)
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if err != nil {
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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)
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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)
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}
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resp.Size = len(req.Data)
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if req.Offset == 0 {
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// detect mime type
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var possibleExt string
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fh.contentType, possibleExt = mimetype.Detect(req.Data)
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if ext := path.Ext(fh.f.Name); ext != possibleExt {
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fh.contentType = mime.TypeByExtension(ext)
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}
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fh.dirtyMetadata = true
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}
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fh.f.addChunks(chunks)
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if len(chunks) > 0 {
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fh.dirtyMetadata = true
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}
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return nil
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}
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func (fh *FileHandle) Release(ctx context.Context, req *fuse.ReleaseRequest) error {
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glog.V(4).Infof("%v release fh %d", fh.f.fullpath(), fh.handle)
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fh.dirtyPages.releaseResource()
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fh.f.wfs.ReleaseHandle(fh.f.fullpath(), fuse.HandleID(fh.handle))
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fh.f.isOpen = false
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return nil
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}
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func (fh *FileHandle) Flush(ctx context.Context, req *fuse.FlushRequest) error {
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// fflush works at fh level
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// send the data to the OS
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glog.V(4).Infof("%s fh %d flush %v", fh.f.fullpath(), fh.handle, req)
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chunk, err := fh.dirtyPages.FlushToStorage(ctx)
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if err != nil {
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glog.Errorf("flush %s/%s: %v", fh.f.dir.Path, fh.f.Name, err)
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return fmt.Errorf("flush %s/%s: %v", fh.f.dir.Path, fh.f.Name, err)
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}
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fh.f.addChunk(chunk)
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if !fh.dirtyMetadata {
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return nil
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}
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return fh.f.wfs.WithFilerClient(ctx, func(client filer_pb.SeaweedFilerClient) error {
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if fh.f.entry.Attributes != nil {
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fh.f.entry.Attributes.Mime = fh.contentType
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fh.f.entry.Attributes.Uid = req.Uid
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fh.f.entry.Attributes.Gid = req.Gid
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fh.f.entry.Attributes.Mtime = time.Now().Unix()
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fh.f.entry.Attributes.Crtime = time.Now().Unix()
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fh.f.entry.Attributes.FileMode = uint32(0770)
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}
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request := &filer_pb.CreateEntryRequest{
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Directory: fh.f.dir.Path,
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Entry: fh.f.entry,
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}
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//glog.V(1).Infof("%s/%s set chunks: %v", fh.f.dir.Path, fh.f.Name, len(fh.f.entry.Chunks))
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//for i, chunk := range fh.f.entry.Chunks {
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// 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))
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//}
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chunks, garbages := filer2.CompactFileChunks(fh.f.entry.Chunks)
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fh.f.entry.Chunks = chunks
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// fh.f.entryViewCache = nil
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fh.f.wfs.deleteFileChunks(ctx, garbages)
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if _, err := client.CreateEntry(ctx, request); err != nil {
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return fmt.Errorf("update fh: %v", err)
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}
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return nil
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})
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}
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