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package filesys
import (
"bazil.org/fuse"
"bazil.org/fuse/fs"
"context"
"math"
"path/filepath"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
)
func (dir *Dir) Rename(ctx context.Context, req *fuse.RenameRequest, newDirectory fs.Node) error {
newDir := newDirectory.(*Dir)
return dir.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
// find existing entry
request := &filer_pb.LookupDirectoryEntryRequest{
Directory: dir.Path,
Name: req.OldName,
}
glog.V(4).Infof("find existing directory entry: %v", request)
resp, err := client.LookupDirectoryEntry(ctx, request)
if err != nil {
glog.V(0).Infof("renaming find %s/%s: %v", dir.Path, req.OldName, err)
return fuse.ENOENT
}
entry := resp.Entry
glog.V(4).Infof("found existing directory entry resp: %+v", resp)
return moveEntry(ctx, client, dir.Path, entry, newDir.Path, req.NewName)
})
}
func moveEntry(ctx context.Context, client filer_pb.SeaweedFilerClient, oldParent string, entry *filer_pb.Entry, newParent, newName string) error {
if entry.IsDirectory {
currentDirPath := filepath.Join(oldParent, entry.Name)
lastFileName := ""
includeLastFile := false
limit := math.MaxInt32
for limit > 0 {
request := &filer_pb.ListEntriesRequest{
Directory: currentDirPath,
StartFromFileName: lastFileName,
InclusiveStartFrom: includeLastFile,
Limit: 1024,
}
glog.V(4).Infof("read directory: %v", request)
resp, err := client.ListEntries(ctx, request)
if err != nil {
glog.V(0).Infof("list %s: %v", oldParent, err)
return fuse.EIO
}
if len(resp.Entries) == 0 {
break
}
for _, item := range resp.Entries {
lastFileName = item.Name
err := moveEntry(ctx, client, currentDirPath, item, filepath.Join(newParent, newName), item.Name)
if err != nil {
return err
}
limit--
}
if len(resp.Entries) < 1024 {
break
}
}
}
// add to new directory
{
request := &filer_pb.CreateEntryRequest{
Directory: newParent,
Entry: &filer_pb.Entry{
Name: newName,
IsDirectory: entry.IsDirectory,
Attributes: entry.Attributes,
Chunks: entry.Chunks,
},
}
glog.V(1).Infof("create new entry: %v", request)
if _, err := client.CreateEntry(ctx, request); err != nil {
glog.V(0).Infof("renaming create %s/%s: %v", newParent, newName, err)
return fuse.EIO
}
}
// delete old entry
{
request := &filer_pb.DeleteEntryRequest{
Directory: oldParent,
Name: entry.Name,
IsDeleteData: false,
}
glog.V(1).Infof("remove old entry: %v", request)
_, err := client.DeleteEntry(ctx, request)
if err != nil {
glog.V(0).Infof("renaming delete %s/%s: %v", oldParent, entry.Name, err)
return fuse.EIO
}
}
return nil
}
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