From 07fcba888cbb7c84b1e568c3e07700e2ee2d8c09 Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood <nick@craig-wood.com>
Date: Sun, 31 Oct 2021 19:07:09 +0000
Subject: [PATCH] dircache: add SetRootIDAlias to update RootID from FindLeaf
---
lib/dircache/dircache.go | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/lib/dircache/dircache.go b/lib/dircache/dircache.go
index 1b77cfdba..a8c9d3a6f 100644
--- a/lib/dircache/dircache.go
+++ b/lib/dircache/dircache.go
@@ -126,6 +126,20 @@ func (dc *DirCache) Flush() {
dc.cacheMu.Unlock()
}
+// SetRootIDAlias sets the rootID to that passed in. This assumes that
+// the new ID is just an alias for the old ID so does not flush
+// anything.
+//
+// This should be called from FindLeaf (and only from FindLeaf) if it
+// is discovered that the root ID is incorrect. For example some
+// backends use "0" as a root ID, but it has a real ID which is needed
+// for some operations.
+func (dc *DirCache) SetRootIDAlias(rootID string) {
+ // No locking as this is called from FindLeaf
+ dc.rootID = rootID
+ dc.Put("", dc.rootID)
+}
+
// FlushDir flushes the map of all data starting with with the path
// dir.
//