small refactor*

server/pkg/go-nfs/nfs_onfsstat.go

@@ -0,0 +1,59 @@
+package nfs
+
+import (
+	"bytes"
+	"context"
+
+	billy "github.com/go-git/go-billy/v5"
+	"github.com/willscott/go-nfs-client/nfs/xdr"
+)
+
+func onFSStat(ctx context.Context, w *response, userHandle Handler) error {
+	roothandle, err := xdr.ReadOpaque(w.req.Body)
+	if err != nil {
+		return &NFSStatusError{NFSStatusInval, err}
+	}
+	fs, path, err := userHandle.FromHandle(ctx, roothandle)
+	if err != nil {
+		return &NFSStatusError{NFSStatusStale, err}
+	}
+
+	defaults := FSStat{
+		TotalSize:      1 << 62,
+		FreeSize:       1 << 62,
+		AvailableSize:  1 << 62,
+		TotalFiles:     1 << 62,
+		FreeFiles:      1 << 62,
+		AvailableFiles: 1 << 62,
+		CacheHint:      0,
+	}
+
+	if !CapabilityCheck(fs, billy.WriteCapability) {
+		defaults.AvailableFiles = 0
+		defaults.AvailableSize = 0
+	}
+
+	err = userHandle.FSStat(ctx, fs, &defaults)
+	if err != nil {
+		if _, ok := err.(*NFSStatusError); ok {
+			return err
+		}
+		return &NFSStatusError{NFSStatusServerFault, err}
+	}
+
+	writer := bytes.NewBuffer([]byte{})
+	if err := xdr.Write(writer, uint32(NFSStatusOk)); err != nil {
+		return &NFSStatusError{NFSStatusServerFault, err}
+	}
+	if err := WritePostOpAttrs(writer, tryStat(ctx, fs, path)); err != nil {
+		return &NFSStatusError{NFSStatusServerFault, err}
+	}
+
+	if err := xdr.Write(writer, defaults); err != nil {
+		return &NFSStatusError{NFSStatusServerFault, err}
+	}
+	if err := w.Write(writer.Bytes()); err != nil {
+		return &NFSStatusError{NFSStatusServerFault, err}
+	}
+	return nil
+}