From c1a3e363a61dfead5006d50142c151b3c58f6849 Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood <nick@craig-wood.com>
Date: Tue, 13 Mar 2018 12:31:46 +0000
Subject: [PATCH] mount: return ENOSYS rather than EIO on attempted link

This fixes FileZilla accessing an rclone mount served over sftp.

See: https://forum.rclone.org/t/moving-files-on-rclone-mount-with-filezilla/5029
---
 cmd/mount/dir.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/cmd/mount/dir.go b/cmd/mount/dir.go
index 939935678..3af77e069 100644
--- a/cmd/mount/dir.go
+++ b/cmd/mount/dir.go
@@ -183,3 +183,13 @@ func (d *Dir) Fsync(ctx context.Context, req *fuse.FsyncRequest) (err error) {
 	}
 	return nil
 }
+
+// Check interface satisfied
+var _ fusefs.NodeLinker = (*Dir)(nil)
+
+// Link creates a new directory entry in the receiver based on an
+// existing Node. Receiver must be a directory.
+func (d *Dir) Link(ctx context.Context, req *fuse.LinkRequest, old fusefs.Node) (new fusefs.Node, err error) {
+	defer log.Trace(d, "req=%v, old=%v", req, old)("new=%v, err=%v", &new, &err)
+	return nil, fuse.ENOSYS
+}