mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
319 lines
8.3 KiB
Go
319 lines
8.3 KiB
Go
package filesys
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"io"
|
|
"math"
|
|
"net/http"
|
|
"os"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/seaweedfs/fuse"
|
|
"github.com/seaweedfs/fuse/fs"
|
|
|
|
"github.com/chrislusf/seaweedfs/weed/filer"
|
|
"github.com/chrislusf/seaweedfs/weed/glog"
|
|
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
|
|
)
|
|
|
|
type FileHandle struct {
|
|
// cache file has been written to
|
|
dirtyPages DirtyPages
|
|
entryViewCache []filer.VisibleInterval
|
|
reader io.ReaderAt
|
|
contentType string
|
|
handle uint64
|
|
sync.Mutex
|
|
|
|
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
|
|
writeOnly bool
|
|
}
|
|
|
|
func newFileHandle(file *File, uid, gid uint32, writeOnly bool) *FileHandle {
|
|
fh := &FileHandle{
|
|
f: file,
|
|
// dirtyPages: newContinuousDirtyPages(file, writeOnly),
|
|
dirtyPages: newTempFileDirtyPages(file, writeOnly),
|
|
Uid: uid,
|
|
Gid: gid,
|
|
}
|
|
entry := fh.f.getEntry()
|
|
if entry != nil {
|
|
entry.Attributes.FileSize = filer.FileSize(entry)
|
|
}
|
|
|
|
return fh
|
|
}
|
|
|
|
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) size %d resp.Data cap=%d", fh.f.fullpath(), fh.handle, req.Offset, req.Offset+int64(req.Size), req.Size, cap(resp.Data))
|
|
fh.Lock()
|
|
defer fh.Unlock()
|
|
|
|
if req.Size <= 0 {
|
|
return nil
|
|
}
|
|
|
|
buff := resp.Data[:cap(resp.Data)]
|
|
if req.Size > cap(resp.Data) {
|
|
// should not happen
|
|
buff = make([]byte, req.Size)
|
|
}
|
|
|
|
totalRead, err := fh.readFromChunks(buff, req.Offset)
|
|
if err == nil || err == io.EOF {
|
|
maxStop := fh.readFromDirtyPages(buff, req.Offset)
|
|
totalRead = max(maxStop-req.Offset, totalRead)
|
|
}
|
|
|
|
if err == io.EOF {
|
|
err = nil
|
|
}
|
|
|
|
if err != nil {
|
|
glog.Warningf("file handle read %s %d: %v", fh.f.fullpath(), totalRead, err)
|
|
return fuse.EIO
|
|
}
|
|
|
|
if totalRead > int64(len(buff)) {
|
|
glog.Warningf("%s FileHandle Read %d: [%d,%d) size %d totalRead %d", fh.f.fullpath(), fh.handle, req.Offset, req.Offset+int64(req.Size), req.Size, totalRead)
|
|
totalRead = min(int64(len(buff)), totalRead)
|
|
}
|
|
if err == nil {
|
|
resp.Data = buff[:totalRead]
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
func (fh *FileHandle) readFromDirtyPages(buff []byte, startOffset int64) (maxStop int64) {
|
|
maxStop = fh.dirtyPages.ReadDirtyDataAt(buff, startOffset)
|
|
return
|
|
}
|
|
|
|
func (fh *FileHandle) readFromChunks(buff []byte, offset int64) (int64, error) {
|
|
|
|
entry := fh.f.getEntry()
|
|
if entry == nil {
|
|
return 0, io.EOF
|
|
}
|
|
|
|
fileSize := int64(filer.FileSize(entry))
|
|
fileFullPath := fh.f.fullpath()
|
|
|
|
if fileSize == 0 {
|
|
glog.V(1).Infof("empty fh %v", fileFullPath)
|
|
return 0, io.EOF
|
|
}
|
|
|
|
if offset+int64(len(buff)) <= int64(len(entry.Content)) {
|
|
totalRead := copy(buff, entry.Content[offset:])
|
|
glog.V(4).Infof("file handle read cached %s [%d,%d] %d", fileFullPath, offset, offset+int64(totalRead), totalRead)
|
|
return int64(totalRead), nil
|
|
}
|
|
|
|
var chunkResolveErr error
|
|
if fh.entryViewCache == nil {
|
|
fh.entryViewCache, chunkResolveErr = filer.NonOverlappingVisibleIntervals(fh.f.wfs.LookupFn(), entry.Chunks)
|
|
if chunkResolveErr != nil {
|
|
return 0, fmt.Errorf("fail to resolve chunk manifest: %v", chunkResolveErr)
|
|
}
|
|
fh.reader = nil
|
|
}
|
|
|
|
reader := fh.reader
|
|
if reader == nil {
|
|
chunkViews := filer.ViewFromVisibleIntervals(fh.entryViewCache, 0, math.MaxInt64)
|
|
reader = filer.NewChunkReaderAtFromClient(fh.f.wfs.LookupFn(), chunkViews, fh.f.wfs.chunkCache, fileSize)
|
|
}
|
|
fh.reader = reader
|
|
|
|
totalRead, err := reader.ReadAt(buff, offset)
|
|
|
|
if err != nil && err != io.EOF {
|
|
glog.Errorf("file handle read %s: %v", fileFullPath, err)
|
|
}
|
|
|
|
// glog.V(4).Infof("file handle read %s [%d,%d] %d : %v", fileFullPath, offset, offset+int64(totalRead), totalRead, err)
|
|
|
|
return int64(totalRead), err
|
|
}
|
|
|
|
// Write to the file handle
|
|
func (fh *FileHandle) Write(ctx context.Context, req *fuse.WriteRequest, resp *fuse.WriteResponse) error {
|
|
|
|
fh.Lock()
|
|
defer fh.Unlock()
|
|
|
|
// write the request to volume servers
|
|
data := req.Data
|
|
if len(data) <= 512 {
|
|
// fuse message cacheable size
|
|
data = make([]byte, len(req.Data))
|
|
copy(data, req.Data)
|
|
}
|
|
|
|
entry := fh.f.getEntry()
|
|
if entry == nil {
|
|
return fuse.EIO
|
|
}
|
|
|
|
entry.Content = nil
|
|
entry.Attributes.FileSize = uint64(max(req.Offset+int64(len(data)), int64(entry.Attributes.FileSize)))
|
|
// glog.V(4).Infof("%v write [%d,%d) %d", fh.f.fullpath(), req.Offset, req.Offset+int64(len(req.Data)), len(req.Data))
|
|
|
|
fh.dirtyPages.AddPage(req.Offset, data)
|
|
|
|
resp.Size = len(data)
|
|
|
|
if req.Offset == 0 {
|
|
// detect mime type
|
|
fh.contentType = http.DetectContentType(data)
|
|
fh.f.dirtyMetadata = true
|
|
}
|
|
|
|
fh.f.dirtyMetadata = true
|
|
|
|
return nil
|
|
}
|
|
|
|
func (fh *FileHandle) Release(ctx context.Context, req *fuse.ReleaseRequest) error {
|
|
|
|
glog.V(4).Infof("Release %v fh %d open=%d", fh.f.fullpath(), fh.handle, fh.f.isOpen)
|
|
|
|
fh.Lock()
|
|
defer fh.Unlock()
|
|
|
|
fh.f.isOpen--
|
|
|
|
if fh.f.isOpen <= 0 {
|
|
fh.f.entry = nil
|
|
fh.entryViewCache = nil
|
|
fh.reader = nil
|
|
|
|
fh.f.wfs.ReleaseHandle(fh.f.fullpath(), fuse.HandleID(fh.handle))
|
|
}
|
|
|
|
if fh.f.isOpen < 0 {
|
|
glog.V(0).Infof("Release reset %s open count %d => %d", fh.f.Name, fh.f.isOpen, 0)
|
|
fh.f.isOpen = 0
|
|
return nil
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (fh *FileHandle) Flush(ctx context.Context, req *fuse.FlushRequest) error {
|
|
|
|
glog.V(4).Infof("Flush %v fh %d", fh.f.fullpath(), fh.handle)
|
|
|
|
fh.Lock()
|
|
defer fh.Unlock()
|
|
|
|
if err := fh.doFlush(ctx, req.Header); err != nil {
|
|
glog.Errorf("Flush doFlush %s: %v", fh.f.Name, err)
|
|
return err
|
|
}
|
|
|
|
glog.V(4).Infof("Flush %v fh %d success", fh.f.fullpath(), fh.handle)
|
|
return nil
|
|
}
|
|
|
|
func (fh *FileHandle) doFlush(ctx context.Context, header fuse.Header) error {
|
|
// flush works at fh level
|
|
// send the data to the OS
|
|
glog.V(4).Infof("doFlush %s fh %d", fh.f.fullpath(), fh.handle)
|
|
|
|
if err := fh.dirtyPages.FlushData(); err != nil {
|
|
glog.Errorf("%v doFlush: %v", fh.f.fullpath(), err)
|
|
return fuse.EIO
|
|
}
|
|
|
|
if !fh.f.dirtyMetadata {
|
|
return nil
|
|
}
|
|
|
|
err := fh.f.wfs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
|
|
|
|
entry := fh.f.getEntry()
|
|
if entry == nil {
|
|
return nil
|
|
}
|
|
|
|
if entry.Attributes != nil {
|
|
entry.Attributes.Mime = fh.contentType
|
|
if entry.Attributes.Uid == 0 {
|
|
entry.Attributes.Uid = header.Uid
|
|
}
|
|
if entry.Attributes.Gid == 0 {
|
|
entry.Attributes.Gid = header.Gid
|
|
}
|
|
if entry.Attributes.Crtime == 0 {
|
|
entry.Attributes.Crtime = time.Now().Unix()
|
|
}
|
|
entry.Attributes.Mtime = time.Now().Unix()
|
|
entry.Attributes.FileMode = uint32(os.FileMode(entry.Attributes.FileMode) &^ fh.f.wfs.option.Umask)
|
|
entry.Attributes.Collection, entry.Attributes.Replication = fh.dirtyPages.GetStorageOptions()
|
|
}
|
|
|
|
request := &filer_pb.CreateEntryRequest{
|
|
Directory: fh.f.dir.FullPath(),
|
|
Entry: entry,
|
|
Signatures: []int32{fh.f.wfs.signature},
|
|
}
|
|
|
|
glog.V(4).Infof("%s set chunks: %v", fh.f.fullpath(), len(entry.Chunks))
|
|
for i, chunk := range entry.Chunks {
|
|
glog.V(4).Infof("%s chunks %d: %v [%d,%d)", fh.f.fullpath(), i, chunk.GetFileIdString(), chunk.Offset, chunk.Offset+int64(chunk.Size))
|
|
}
|
|
|
|
manifestChunks, nonManifestChunks := filer.SeparateManifestChunks(entry.Chunks)
|
|
|
|
chunks, _ := filer.CompactFileChunks(fh.f.wfs.LookupFn(), nonManifestChunks)
|
|
chunks, manifestErr := filer.MaybeManifestize(fh.f.wfs.saveDataAsChunk(fh.f.fullpath(), fh.dirtyPages.GetWriteOnly()), chunks)
|
|
if manifestErr != nil {
|
|
// not good, but should be ok
|
|
glog.V(0).Infof("MaybeManifestize: %v", manifestErr)
|
|
}
|
|
entry.Chunks = append(chunks, manifestChunks...)
|
|
|
|
fh.f.wfs.mapPbIdFromLocalToFiler(request.Entry)
|
|
defer fh.f.wfs.mapPbIdFromFilerToLocal(request.Entry)
|
|
|
|
if err := filer_pb.CreateEntry(client, request); err != nil {
|
|
glog.Errorf("fh flush create %s: %v", fh.f.fullpath(), err)
|
|
return fmt.Errorf("fh flush create %s: %v", fh.f.fullpath(), err)
|
|
}
|
|
|
|
fh.f.wfs.metaCache.InsertEntry(context.Background(), filer.FromPbEntry(request.Directory, request.Entry))
|
|
|
|
return nil
|
|
})
|
|
|
|
if err == nil {
|
|
fh.f.dirtyMetadata = false
|
|
}
|
|
|
|
if err != nil {
|
|
glog.Errorf("%v fh %d flush: %v", fh.f.fullpath(), fh.handle, err)
|
|
return fuse.EIO
|
|
}
|
|
|
|
return nil
|
|
}
|