You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
243 lines
6.4 KiB
243 lines
6.4 KiB
package filesys
|
|
|
|
import (
|
|
"bazil.org/fuse/fs"
|
|
"fmt"
|
|
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
|
|
"github.com/chrislusf/seaweedfs/weed/filer2"
|
|
"context"
|
|
"github.com/chrislusf/seaweedfs/weed/glog"
|
|
"bazil.org/fuse"
|
|
"bytes"
|
|
"github.com/chrislusf/seaweedfs/weed/operation"
|
|
"time"
|
|
"strings"
|
|
"sync"
|
|
"github.com/chrislusf/seaweedfs/weed/util"
|
|
)
|
|
|
|
type FileHandle struct {
|
|
// cache file has been written to
|
|
dirty bool
|
|
|
|
cachePath string
|
|
|
|
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
|
|
}
|
|
|
|
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(3).Infof("%v/%v read fh: [%d,%d)", fh.f.dir.Path, fh.f.Name, req.Offset, req.Offset+int64(req.Size))
|
|
|
|
if len(fh.f.Chunks) == 0 {
|
|
glog.V(0).Infof("empty fh %v/%v", fh.f.dir.Path, fh.f.Name)
|
|
return fmt.Errorf("empty file %v/%v", fh.f.dir.Path, fh.f.Name)
|
|
}
|
|
|
|
buff := make([]byte, req.Size)
|
|
|
|
chunkViews := filer2.ReadFromChunks(fh.f.Chunks, req.Offset, req.Size)
|
|
|
|
var vids []string
|
|
for _, chunkView := range chunkViews {
|
|
vids = append(vids, volumeId(chunkView.FileId))
|
|
}
|
|
|
|
vid2Locations := make(map[string]*filer_pb.Locations)
|
|
|
|
err := fh.f.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
|
|
|
|
glog.V(4).Infof("read fh lookup volume id locations: %v", vids)
|
|
resp, err := client.LookupVolume(ctx, &filer_pb.LookupVolumeRequest{
|
|
VolumeIds: vids,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
vid2Locations = resp.LocationsMap
|
|
|
|
return nil
|
|
})
|
|
|
|
if err != nil {
|
|
glog.V(3).Infof("%v/%v read fh lookup volume ids: %v", fh.f.dir.Path, fh.f.Name, err)
|
|
return fmt.Errorf("failed to lookup volume ids %v: %v", vids, err)
|
|
}
|
|
|
|
var totalRead int64
|
|
var wg sync.WaitGroup
|
|
for _, chunkView := range chunkViews {
|
|
wg.Add(1)
|
|
go func(chunkView *filer2.ChunkView) {
|
|
defer wg.Done()
|
|
|
|
glog.V(3).Infof("read fh reading chunk: %+v", chunkView)
|
|
|
|
locations := vid2Locations[volumeId(chunkView.FileId)]
|
|
if locations == nil || len(locations.Locations) == 0 {
|
|
glog.V(0).Infof("failed to locate %s", chunkView.FileId)
|
|
err = fmt.Errorf("failed to locate %s", chunkView.FileId)
|
|
return
|
|
}
|
|
|
|
var n int64
|
|
n, err = util.ReadUrl(
|
|
fmt.Sprintf("http://%s/%s", locations.Locations[0].Url, chunkView.FileId),
|
|
chunkView.Offset,
|
|
int(chunkView.Size),
|
|
buff[chunkView.LogicOffset-req.Offset:chunkView.LogicOffset-req.Offset+int64(chunkView.Size)])
|
|
|
|
if err != nil {
|
|
|
|
glog.V(0).Infof("%v/%v read http://%s/%v %v bytes: %v", fh.f.dir.Path, fh.f.Name, locations.Locations[0].Url, chunkView.FileId, n, err)
|
|
|
|
err = fmt.Errorf("failed to read http://%s/%s: %v",
|
|
locations.Locations[0].Url, chunkView.FileId, err)
|
|
return
|
|
}
|
|
|
|
glog.V(3).Infof("read fh read %d bytes: %+v", n, chunkView)
|
|
totalRead += n
|
|
|
|
}(chunkView)
|
|
}
|
|
wg.Wait()
|
|
|
|
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(3).Infof("%+v/%v write fh: %+v", fh.f.dir.Path, fh.f.Name, req)
|
|
|
|
var fileId, host string
|
|
|
|
if err := fh.f.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
|
|
|
|
request := &filer_pb.AssignVolumeRequest{
|
|
Count: 1,
|
|
Replication: "000",
|
|
Collection: "",
|
|
}
|
|
|
|
resp, err := client.AssignVolume(ctx, request)
|
|
if err != nil {
|
|
glog.V(0).Infof("assign volume failure %v: %v", request, err)
|
|
return err
|
|
}
|
|
|
|
fileId, host = resp.FileId, resp.Url
|
|
|
|
return nil
|
|
}); err != nil {
|
|
return fmt.Errorf("filer assign volume: %v", err)
|
|
}
|
|
|
|
fileUrl := fmt.Sprintf("http://%s/%s", host, fileId)
|
|
bufReader := bytes.NewReader(req.Data)
|
|
uploadResult, err := operation.Upload(fileUrl, fh.f.Name, bufReader, false, "application/octet-stream", nil, "")
|
|
if err != nil {
|
|
glog.V(0).Infof("upload data %v to %s: %v", req, fileUrl, err)
|
|
return fmt.Errorf("upload data: %v", err)
|
|
}
|
|
if uploadResult.Error != "" {
|
|
glog.V(0).Infof("upload failure %v to %s: %v", req, fileUrl, err)
|
|
return fmt.Errorf("upload result: %v", uploadResult.Error)
|
|
}
|
|
|
|
resp.Size = int(uploadResult.Size)
|
|
|
|
fh.f.Chunks = append(fh.f.Chunks, &filer_pb.FileChunk{
|
|
FileId: fileId,
|
|
Offset: req.Offset,
|
|
Size: uint64(uploadResult.Size),
|
|
Mtime: time.Now().UnixNano(),
|
|
})
|
|
|
|
glog.V(1).Infof("uploaded %s/%s to: %v, [%d,%d)", fh.f.dir.Path, fh.f.Name, fileUrl, req.Offset, req.Offset+int64(resp.Size))
|
|
|
|
fh.dirty = true
|
|
|
|
return nil
|
|
}
|
|
|
|
func (fh *FileHandle) Release(ctx context.Context, req *fuse.ReleaseRequest) error {
|
|
|
|
glog.V(3).Infof("%+v/%v release fh", fh.f.dir.Path, fh.f.Name)
|
|
|
|
fh.f.isOpen = false
|
|
|
|
return nil
|
|
}
|
|
|
|
// Flush - experimenting with uploading at flush, this slows operations down till it has been
|
|
// completely flushed
|
|
func (fh *FileHandle) Flush(ctx context.Context, req *fuse.FlushRequest) error {
|
|
// fflush works at fh level
|
|
// send the data to the OS
|
|
glog.V(3).Infof("%s/%s fh flush %v", fh.f.dir.Path, fh.f.Name, req)
|
|
|
|
if !fh.dirty {
|
|
return nil
|
|
}
|
|
|
|
if len(fh.f.Chunks) == 0 {
|
|
glog.V(2).Infof("fh %s/%s flush skipping empty: %v", fh.f.dir.Path, fh.f.Name, req)
|
|
return nil
|
|
}
|
|
|
|
err := fh.f.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
|
|
|
|
request := &filer_pb.UpdateEntryRequest{
|
|
Directory: fh.f.dir.Path,
|
|
Entry: &filer_pb.Entry{
|
|
Name: fh.f.Name,
|
|
Attributes: fh.f.attributes,
|
|
Chunks: fh.f.Chunks,
|
|
},
|
|
}
|
|
|
|
glog.V(1).Infof("%s/%s set chunks: %v", fh.f.dir.Path, fh.f.Name, len(fh.f.Chunks))
|
|
for i, chunk := range fh.f.Chunks {
|
|
glog.V(1).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))
|
|
}
|
|
if _, err := client.UpdateEntry(ctx, request); err != nil {
|
|
return fmt.Errorf("update fh: %v", err)
|
|
}
|
|
|
|
return nil
|
|
})
|
|
|
|
if err == nil {
|
|
fh.dirty = false
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
func volumeId(fileId string) string {
|
|
lastCommaIndex := strings.LastIndex(fileId, ",")
|
|
if lastCommaIndex > 0 {
|
|
return fileId[:lastCommaIndex]
|
|
}
|
|
return fileId
|
|
}
|