Files
seaweedFS/weed/mount/weedfs_symlink.go
Chris Lu d4ecfaeda7 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.
2026-01-06 10:50:54 -08:00

97 lines
2.6 KiB
Go

package mount
import (
"context"
"fmt"
"os"
"syscall"
"time"
"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"
)
/** Create a symbolic link */
func (wfs *WFS) Symlink(cancel <-chan struct{}, header *fuse.InHeader, target string, name string, out *fuse.EntryOut) (code fuse.Status) {
if wfs.IsOverQuotaWithUncommitted() {
return fuse.Status(syscall.ENOSPC)
}
if s := checkName(name); s != fuse.OK {
return s
}
dirPath, code := wfs.inodeToPath.GetPath(header.NodeId)
if code != fuse.OK {
return
}
entryFullPath := dirPath.Child(name)
request := &filer_pb.CreateEntryRequest{
Directory: string(dirPath),
Entry: &filer_pb.Entry{
Name: name,
IsDirectory: false,
Attributes: &filer_pb.FuseAttributes{
Mtime: time.Now().Unix(),
Crtime: time.Now().Unix(),
FileMode: uint32(os.FileMode(0777) | os.ModeSymlink),
Uid: header.Uid,
Gid: header.Gid,
SymlinkTarget: target,
},
},
Signatures: []int32{wfs.signature},
SkipCheckParentDirectory: true,
}
err := wfs.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
wfs.mapPbIdFromLocalToFiler(request.Entry)
defer wfs.mapPbIdFromFilerToLocal(request.Entry)
if err := filer_pb.CreateEntry(context.Background(), client, request); err != nil {
return fmt.Errorf("symlink %s: %v", entryFullPath, err)
}
// Only cache the entry if the parent directory is already cached.
if wfs.metaCache.IsDirectoryCached(dirPath) {
if err := wfs.metaCache.InsertEntry(context.Background(), filer.FromPbEntry(request.Directory, request.Entry)); err != nil {
return fmt.Errorf("insert meta cache for symlink %s: %w", entryFullPath, err)
}
}
return nil
})
if err != nil {
glog.V(0).Infof("Symlink %s => %s: %v", entryFullPath, target, err)
return fuse.EIO
}
inode := wfs.inodeToPath.Lookup(entryFullPath, request.Entry.Attributes.Crtime, false, false, 0, true)
wfs.outputPbEntry(out, inode, request.Entry)
return fuse.OK
}
func (wfs *WFS) Readlink(cancel <-chan struct{}, header *fuse.InHeader) (out []byte, code fuse.Status) {
entryFullPath, code := wfs.inodeToPath.GetPath(header.NodeId)
if code != fuse.OK {
return
}
entry, status := wfs.maybeLoadEntry(entryFullPath)
if status != fuse.OK {
return nil, status
}
if os.FileMode(entry.Attributes.FileMode)&os.ModeSymlink == 0 {
return nil, fuse.EINVAL
}
return []byte(entry.Attributes.SymlinkTarget), fuse.OK
}