Enable writeback_cache and async_dio FUSE options (#7980)

* Enable writeback_cache and async_dio FUSE options

Fixes #7978

- Update mount_std.go to use EnableWriteback and EnableAsyncDio from go-fuse
- Add go.mod replace directive to use local go-fuse with capability support
- Remove temporary workaround that disabled these options

This enables proper FUSE kernel capability negotiation for writeback cache
and async direct I/O, improving performance for small writes and concurrent
direct I/O operations.

* Address PR review comments

- Remove redundant nil checks for writebackCache and asyncDio flags
- Update go.mod replace directive to use seaweedfs/go-fuse fork instead of local path

* Add TODO comment for go.mod replace directive

The replace directive must use a local path until seaweedfs/go-fuse#1 is merged.
After merge, this should be updated to use the proper version.

* Use seaweedfs/go-fuse v2.9.0 instead of local repository

Replace local path with seaweedfs/go-fuse v2.9.0 fork which includes
the writeback_cache and async_dio capability support.

* Use github.com/seaweedfs/go-fuse/v2 directly without replace directive

- Updated all imports to use github.com/seaweedfs/go-fuse/v2
- Removed replace directive from go.mod
- Using seaweedfs/go-fuse v2.0.0-20260106181308-87f90219ce09 which includes:
  * writeback_cache and async_dio support
  * Corrected module path

* Update to seaweedfs/go-fuse v2.9.1

Use v2.9.1 tag which includes the corrected module path
(github.com/seaweedfs/go-fuse/v2) along with writeback_cache
and async_dio support.

weed/command/mount_std.go

@@ -18,7 +18,7 @@ import (
 
 	"github.com/seaweedfs/seaweedfs/weed/util/version"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/mount"
 	"github.com/seaweedfs/seaweedfs/weed/mount/meta_cache"
@@ -216,12 +216,8 @@ func RunMount(option *MountOptions, umask os.FileMode) bool {
 		fuseMountOptions.Options = append(fuseMountOptions.Options, fmt.Sprintf("iosize=%d", ioSizeMB*1024*1024))
 	}
 
-	if option.writebackCache != nil && *option.writebackCache {
-		fuseMountOptions.Options = append(fuseMountOptions.Options, "writeback_cache")
-	}
-	if option.asyncDio != nil && *option.asyncDio {
-		fuseMountOptions.Options = append(fuseMountOptions.Options, "async_dio")
-	}
+	fuseMountOptions.EnableWriteback = *option.writebackCache
+	fuseMountOptions.EnableAsyncDio = *option.asyncDio
 	if option.cacheSymlink != nil && *option.cacheSymlink {
 		fuseMountOptions.EnableSymlinkCaching = true
 	}

weed/mount/error_classifier.go

@@ -4,7 +4,7 @@ import (
 	"strings"
 	"syscall"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 )

weed/mount/inode_to_path.go

@@ -4,7 +4,7 @@ import (
 	"sync"
 	"time"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/util"
 )

weed/mount/weedfs.go

@@ -10,7 +10,7 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 	"google.golang.org/grpc"
 
 	"github.com/seaweedfs/seaweedfs/weed/filer"
@@ -26,7 +26,7 @@ import (
 	"github.com/seaweedfs/seaweedfs/weed/util/version"
 	"github.com/seaweedfs/seaweedfs/weed/wdclient"
 
-	"github.com/hanwen/go-fuse/v2/fs"
+	"github.com/seaweedfs/go-fuse/v2/fs"
 )
 
 type Option struct {

weed/mount/weedfs_attr.go

@@ -5,7 +5,7 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"

weed/mount/weedfs_attr_darwin.go

@@ -1,7 +1,7 @@
 package mount
 
 import (
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 )
 
 func setBlksize(out *fuse.Attr, size uint32) {

weed/mount/weedfs_attr_freebsd.go

@@ -1,7 +1,7 @@
 package mount
 
 import (
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 )
 
 func setBlksize(out *fuse.Attr, size uint32) {

weed/mount/weedfs_attr_linux.go

@@ -1,7 +1,7 @@
 package mount
 
 import (
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 )
 
 func setBlksize(out *fuse.Attr, size uint32) {

weed/mount/weedfs_dir_lookup.go

@@ -1,7 +1,7 @@
 package mount
 
 import (
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"

weed/mount/weedfs_dir_mkrm.go

@@ -8,7 +8,7 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"

weed/mount/weedfs_dir_read.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"sync"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/mount/meta_cache"

weed/mount/weedfs_file_copy_range.go

@@ -4,7 +4,7 @@ import (
 	"net/http"
 	"time"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/util"

weed/mount/weedfs_file_io.go

@@ -1,7 +1,7 @@
 package mount
 
 import (
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 )
 

weed/mount/weedfs_file_lseek.go

@@ -6,7 +6,7 @@ import (
 
 	"github.com/seaweedfs/seaweedfs/weed/util"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"

weed/mount/weedfs_file_mkrm.go

@@ -6,7 +6,7 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"

weed/mount/weedfs_file_read.go

@@ -8,7 +8,7 @@ import (
 
 	"github.com/seaweedfs/seaweedfs/weed/util"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 )

weed/mount/weedfs_file_sync.go

@@ -6,7 +6,7 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"

weed/mount/weedfs_file_write.go

@@ -5,7 +5,7 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/util"
 )

weed/mount/weedfs_filehandle.go

@@ -1,7 +1,7 @@
 package mount
 
 import (
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
 	"github.com/seaweedfs/seaweedfs/weed/util"
 )

weed/mount/weedfs_link.go

@@ -6,7 +6,7 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"

weed/mount/weedfs_rename.go

@@ -7,8 +7,8 @@ import (
 	"strings"
 	"syscall"
 
-	"github.com/hanwen/go-fuse/v2/fs"
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fs"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"

weed/mount/weedfs_stats.go

@@ -3,7 +3,7 @@ package mount
 import (
 	"context"
 	"fmt"
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
 	"math"

weed/mount/weedfs_symlink.go

@@ -7,7 +7,7 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"

weed/mount/weedfs_unsupported.go

@@ -1,6 +1,6 @@
 package mount
 
-import "github.com/hanwen/go-fuse/v2/fuse"
+import "github.com/seaweedfs/go-fuse/v2/fuse"
 
 // https://github.com/libfuse/libfuse/blob/48ae2e72b39b6a31cb2194f6f11786b7ca06aac6/include/fuse.h#L778
 

weed/mount/weedfs_xattr.go

@@ -8,7 +8,7 @@ import (
 	"strings"
 	"syscall"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 	sys "golang.org/x/sys/unix"
 )
 

weed/mount/weedfs_xattr_freebsd.go

@@ -3,7 +3,7 @@ package mount
 import (
 	"syscall"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 )
 
 func (wfs *WFS) GetXAttr(cancel <-chan struct{}, header *fuse.InHeader, attr string, dest []byte) (size uint32, code fuse.Status) {

weed/mount/wfs_save.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"syscall"
 
-	"github.com/hanwen/go-fuse/v2/fuse"
+	"github.com/seaweedfs/go-fuse/v2/fuse"
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"