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package filesys
import (
"bazil.org/fuse"
"bazil.org/fuse/fs"
"context"
"github.com/chrislusf/seaweedfs/weed/filer2"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"os"
"path/filepath"
"time"
)
const blockSize = 512
var _ = fs.Node(&File{})
var _ = fs.NodeOpener(&File{})
var _ = fs.NodeFsyncer(&File{})
var _ = fs.NodeSetattrer(&File{})
type File struct {
Name string
dir *Dir
wfs *WFS
entry *filer_pb.Entry
isOpen bool
}
func (file *File) fullpath() string {
return filepath.Join(file.dir.Path, file.Name)
}
func (file *File) Attr(ctx context.Context, attr *fuse.Attr) error {
if err := file.maybeLoadAttributes(ctx); err != nil {
return err
}
attr.Mode = os.FileMode(file.entry.Attributes.FileMode)
attr.Size = filer2.TotalSize(file.entry.Chunks)
attr.Mtime = time.Unix(file.entry.Attributes.Mtime, 0)
attr.Gid = file.entry.Attributes.Gid
attr.Uid = file.entry.Attributes.Uid
attr.Blocks = attr.Size/blockSize + 1
attr.BlockSize = blockSize
return nil
}
func (file *File) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fs.Handle, error) {
glog.V(3).Infof("%v file open %+v", file.fullpath(), req)
file.isOpen = true
handle := file.wfs.AcquireHandle(file, req.Uid, req.Gid)
resp.Handle = fuse.HandleID(handle.handle)
glog.V(3).Infof("%v file open handle id = %d", file.fullpath(), handle.handle)
return handle, nil
}
func (file *File) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fuse.SetattrResponse) error {
if err := file.maybeLoadAttributes(ctx); err != nil {
return err
}
if file.isOpen {
return nil
}
glog.V(3).Infof("%v file setattr %+v, old:%+v", file.fullpath(), req, file.entry.Attributes)
if req.Valid.Size() {
glog.V(3).Infof("%v file setattr set size=%v", file.fullpath(), req.Size)
if req.Size == 0 {
// fmt.Printf("truncate %v \n", fullPath)
file.entry.Chunks = nil
}
file.entry.Attributes.FileSize = req.Size
}
if req.Valid.Mode() {
file.entry.Attributes.FileMode = uint32(req.Mode)
}
if req.Valid.Uid() {
file.entry.Attributes.Uid = req.Uid
}
if req.Valid.Gid() {
file.entry.Attributes.Gid = req.Gid
}
if req.Valid.Mtime() {
file.entry.Attributes.Mtime = req.Mtime.Unix()
}
return file.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.UpdateEntryRequest{
Directory: file.dir.Path,
Entry: file.entry,
}
glog.V(1).Infof("set attr file entry: %v", request)
_, err := client.UpdateEntry(ctx, request)
if err != nil {
glog.V(0).Infof("UpdateEntry file %s/%s: %v", file.dir.Path, file.Name, err)
return fuse.EIO
}
return nil
})
}
func (file *File) Fsync(ctx context.Context, req *fuse.FsyncRequest) error {
// fsync works at OS level
// write the file chunks to the filerGrpcAddress
glog.V(3).Infof("%s/%s fsync file %+v", file.dir.Path, file.Name, req)
return nil
}
func (file *File) maybeLoadAttributes(ctx context.Context) error {
if file.entry == nil || !file.isOpen {
item := file.wfs.listDirectoryEntriesCache.Get(file.fullpath())
if item != nil && !item.Expired() {
entry := item.Value().(*filer_pb.Entry)
file.entry = entry
// glog.V(1).Infof("file attr read cached %v attributes", file.Name)
} else {
err := file.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.LookupDirectoryEntryRequest{
Name: file.Name,
Directory: file.dir.Path,
}
resp, err := client.LookupDirectoryEntry(ctx, request)
if err != nil {
glog.V(0).Infof("file attr read file %v: %v", request, err)
return err
}
file.entry = resp.Entry
glog.V(1).Infof("file attr %v %+v: %d", file.fullpath(), file.entry.Attributes, filer2.TotalSize(file.entry.Chunks))
return nil
})
if err != nil {
return err
}
}
}
return nil
}
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