seaweedfs/weed/mount/wfs_save.go

package mount

import (
	"context"
	"fmt"
	"syscall"

	"github.com/seaweedfs/go-fuse/v2/fuse"
	"github.com/seaweedfs/seaweedfs/weed/glog"
	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
	"github.com/seaweedfs/seaweedfs/weed/util"
)

func (wfs *WFS) saveEntry(path util.FullPath, entry *filer_pb.Entry) (code fuse.Status) {

	parentDir, _ := path.DirAndName()

	err := wfs.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {

		wfs.mapPbIdFromLocalToFiler(entry)
		defer wfs.mapPbIdFromFilerToLocal(entry)

		request := &filer_pb.UpdateEntryRequest{
			Directory:  parentDir,
			Entry:      entry,
			Signatures: []int32{wfs.signature},
		}

		glog.V(1).Infof("save entry: %v", request)
		resp, err := filer_pb.UpdateEntryWithResponse(context.Background(), client, request)
		if err != nil {
			return fmt.Errorf("UpdateEntry dir %s: %v", path, err)
		}

		event := resp.GetMetadataEvent()
		if event == nil {
			event = metadataUpdateEvent(parentDir, entry)
		}
		if applyErr := wfs.applyLocalMetadataEvent(context.Background(), event); applyErr != nil {
			glog.Warningf("saveEntry %s: best-effort metadata apply failed: %v", path, applyErr)
			wfs.inodeToPath.InvalidateChildrenCache(util.FullPath(parentDir))
		}

		return nil
	})
	if err != nil {
		// glog.V(0).Infof("saveEntry %s: %v", path, err)
		fuseStatus := grpcErrorToFuseStatus(err)
		if fuseStatus == fuse.EIO {
			glog.Errorf("saveEntry failed for %s: %v (returning EIO)", path, err)
		} else {
			glog.V(1).Infof("saveEntry failed for %s: %v (returning %v)", path, err, fuseStatus)
		}
		return fuseStatus
	}

	return fuse.OK
}

func (wfs *WFS) mapPbIdFromFilerToLocal(entry *filer_pb.Entry) {
	if entry.Attributes == nil {
		return
	}
	entry.Attributes.Uid, entry.Attributes.Gid = wfs.option.UidGidMapper.FilerToLocal(entry.Attributes.Uid, entry.Attributes.Gid)
}
func (wfs *WFS) mapPbIdFromLocalToFiler(entry *filer_pb.Entry) {
	if entry.Attributes == nil {
		return
	}
	entry.Attributes.Uid, entry.Attributes.Gid = wfs.option.UidGidMapper.LocalToFiler(entry.Attributes.Uid, entry.Attributes.Gid)
}

func checkName(name string) fuse.Status {
	if len(name) >= 4096 {
		return fuse.Status(syscall.ENAMETOOLONG)
	}
	return fuse.OK
}