improve worm support (#5983)

* improve worm support

Signed-off-by: lou <alex1988@outlook.com>

* worm mode in filer

Signed-off-by: lou <alex1988@outlook.com>

* update after review

Signed-off-by: lou <alex1988@outlook.com>

* update after review

Signed-off-by: lou <alex1988@outlook.com>

* move to fs configure

Signed-off-by: lou <alex1988@outlook.com>

* remove flag

Signed-off-by: lou <alex1988@outlook.com>

* update after review

Signed-off-by: lou <alex1988@outlook.com>

* support worm hardlink

Signed-off-by: lou <alex1988@outlook.com>

* update after review

Signed-off-by: lou <alex1988@outlook.com>

* typo

Signed-off-by: lou <alex1988@outlook.com>

* sync filer conf

Signed-off-by: lou <alex1988@outlook.com>

---------

Signed-off-by: lou <alex1988@outlook.com>

weed/command/mount_std.go

@@ -6,6 +6,15 @@ package command
 import (
 	"context"
 	"fmt"
+	"net"
+	"net/http"
+	"os"
+	"os/user"
+	"runtime"
+	"strconv"
+	"strings"
+	"time"
+
 	"github.com/hanwen/go-fuse/v2/fuse"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/mount"
@@ -17,14 +26,6 @@ import (
 	"github.com/seaweedfs/seaweedfs/weed/security"
 	"github.com/seaweedfs/seaweedfs/weed/storage/types"
 	"google.golang.org/grpc/reflection"
-	"net"
-	"net/http"
-	"os"
-	"os/user"
-	"runtime"
-	"strconv"
-	"strings"
-	"time"
 
 	"github.com/seaweedfs/seaweedfs/weed/util"
 	"github.com/seaweedfs/seaweedfs/weed/util/grace"
@@ -247,7 +248,6 @@ func RunMount(option *MountOptions, umask os.FileMode) bool {
 		Cipher:             cipher,
 		UidGidMapper:       uidGidMapper,
 		DisableXAttr:       *option.disableXAttr,
-		WriteOnceReadMany:  *option.writeOnceReadMany,
 	})
 
 	// create mount root
@@ -271,7 +271,11 @@ func RunMount(option *MountOptions, umask os.FileMode) bool {
 	reflection.Register(grpcS)
 	go grpcS.Serve(montSocketListener)
 
-	seaweedFileSystem.StartBackgroundTasks()
+	err = seaweedFileSystem.StartBackgroundTasks()
+	if err != nil {
+		fmt.Printf("failed to start background tasks: %v\n", err)
+		return false
+	}
 
 	glog.V(0).Infof("mounted %s%s to %v", *option.filer, mountRoot, dir)
 	glog.V(0).Infof("This is SeaweedFS version %s %s %s", util.Version(), runtime.GOOS, runtime.GOARCH)