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package filesys
import (
"context"
"github.com/chrislusf/seaweedfs/weed/util"
"os"
"syscall"
"time"
"github.com/chrislusf/seaweedfs/weed/filer"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/seaweedfs/fuse"
"github.com/seaweedfs/fuse/fs"
)
var _ = fs.NodeLinker(&Dir{})
var _ = fs.NodeSymlinker(&Dir{})
var _ = fs.NodeReadlinker(&File{})
func (dir *Dir) Link(ctx context.Context, req *fuse.LinkRequest, old fs.Node) (fs.Node, error) {
oldFile, ok := old.(*File)
if !ok {
glog.Errorf("old node is not a file: %+v", old)
}
glog.V(4).Infof("Link: %v/%v -> %v/%v", oldFile.dir.FullPath(), oldFile.Name, dir.FullPath(), req.NewName)
if err := oldFile.maybeLoadEntry(ctx); err != nil {
return nil, err
}
// update old file to hardlink mode
var updateOldEntryRequest *filer_pb.UpdateEntryRequest
var hardLinkId filer.HardLinkId
if oldFile.entry.HardLinkId != 0 {
hardLinkId = filer.HardLinkId(oldFile.entry.HardLinkId)
} else {
// CreateLink 1.1 : split source entry into hardlink+empty_entry
hardLinkId = filer.HardLinkId(util.RandomInt64())
updateOldEntryRequest = &filer_pb.UpdateEntryRequest{
Directory: oldFile.dir.FullPath(),
Entry: &filer_pb.Entry{
Name: oldFile.entry.Name,
IsDirectory: oldFile.entry.IsDirectory,
HardLinkId: int64(hardLinkId),
},
Signatures: []int32{dir.wfs.signature},
}
}
// CreateLink 1.2 : update new file to hardlink mode
request := &filer_pb.CreateEntryRequest{
Directory: dir.FullPath(),
Entry: &filer_pb.Entry{
Name: req.NewName,
IsDirectory: false,
HardLinkId: int64(hardLinkId),
},
Signatures: []int32{dir.wfs.signature},
}
// apply changes to the filer, and also apply to local metaCache
err := dir.wfs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
dir.wfs.mapPbIdFromLocalToFiler(request.Entry)
defer dir.wfs.mapPbIdFromFilerToLocal(request.Entry)
if updateOldEntryRequest != nil {
if err := filer_pb.UpdateEntry(client, updateOldEntryRequest); err != nil {
glog.V(0).Infof("Link %v/%v -> %s/%s: %v", oldFile.dir.FullPath(), oldFile.Name, dir.FullPath(), req.NewName, err)
return fuse.EIO
}
dir.wfs.metaCache.UpdateEntry(context.Background(), filer.FromPbEntry(updateOldEntryRequest.Directory, updateOldEntryRequest.Entry))
oldFile.entry.HardLinkId = int64(hardLinkId)
}
if err := filer_pb.CreateEntry(client, request); err != nil {
glog.V(0).Infof("Link %v/%v -> %s/%s: %v", oldFile.dir.FullPath(), oldFile.Name, dir.FullPath(), req.NewName, err)
return fuse.EIO
}
dir.wfs.metaCache.InsertEntry(context.Background(), filer.FromPbEntry(request.Directory, request.Entry))
return nil
})
// create new file node
newNode := dir.newFile(req.NewName, request.Entry)
newFile := newNode.(*File)
if err := newFile.maybeLoadEntry(ctx); err != nil {
return nil, err
}
return newFile, err
}
func (dir *Dir) Symlink(ctx context.Context, req *fuse.SymlinkRequest) (fs.Node, error) {
glog.V(4).Infof("Symlink: %v/%v to %v", dir.FullPath(), req.NewName, req.Target)
request := &filer_pb.CreateEntryRequest{
Directory: dir.FullPath(),
Entry: &filer_pb.Entry{
Name: req.NewName,
IsDirectory: false,
Attributes: &filer_pb.FuseAttributes{
Mtime: time.Now().Unix(),
Crtime: time.Now().Unix(),
FileMode: uint32((os.FileMode(0777) | os.ModeSymlink) &^ dir.wfs.option.Umask),
Uid: req.Uid,
Gid: req.Gid,
SymlinkTarget: req.Target,
},
},
Signatures: []int32{dir.wfs.signature},
}
err := dir.wfs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
dir.wfs.mapPbIdFromLocalToFiler(request.Entry)
defer dir.wfs.mapPbIdFromFilerToLocal(request.Entry)
if err := filer_pb.CreateEntry(client, request); err != nil {
glog.V(0).Infof("symlink %s/%s: %v", dir.FullPath(), req.NewName, err)
return fuse.EIO
}
dir.wfs.metaCache.InsertEntry(context.Background(), filer.FromPbEntry(request.Directory, request.Entry))
return nil
})
symlink := dir.newFile(req.NewName, request.Entry)
return symlink, err
}
func (file *File) Readlink(ctx context.Context, req *fuse.ReadlinkRequest) (string, error) {
if err := file.maybeLoadEntry(ctx); err != nil {
return "", err
}
if os.FileMode(file.entry.Attributes.FileMode)&os.ModeSymlink == 0 {
return "", fuse.Errno(syscall.EINVAL)
}
glog.V(4).Infof("Readlink: %v/%v => %v", file.dir.FullPath(), file.Name, file.entry.Attributes.SymlinkTarget)
return file.entry.Attributes.SymlinkTarget, nil
}
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