From f665be1178c72a4768e82bccdfa073a0cf309215 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Fri, 23 Aug 2024 22:32:46 +0200
Subject: reverse: fix force_owner

Fixes https://github.com/rfjakob/gocryptfs/issues/809
---
 internal/fusefrontend_reverse/node.go         | 4 ++++
 internal/fusefrontend_reverse/node_helpers.go | 3 +++
 internal/fusefrontend_reverse/virtualconf.go  | 9 +++++++++
 internal/fusefrontend_reverse/virtualnode.go  | 4 +++-
 4 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/internal/fusefrontend_reverse/node.go b/internal/fusefrontend_reverse/node.go
index 22ad975..30654e0 100644
--- a/internal/fusefrontend_reverse/node.go
+++ b/internal/fusefrontend_reverse/node.go
@@ -69,6 +69,10 @@ func (n *Node) Lookup(ctx context.Context, cName string, out *fuse.EntryOut) (ch
 		n.translateSize(d.dirfd, cName, d.pName, &out.Attr)
 	}
 
+	if rn.args.ForceOwner != nil {
+		out.Owner = *rn.args.ForceOwner
+	}
+
 	// Usually we always create a new Node ID by always incrementing the generation
 	// number.
 	//
diff --git a/internal/fusefrontend_reverse/node_helpers.go b/internal/fusefrontend_reverse/node_helpers.go
index 6bba097..30361bc 100644
--- a/internal/fusefrontend_reverse/node_helpers.go
+++ b/internal/fusefrontend_reverse/node_helpers.go
@@ -201,6 +201,9 @@ func (n *Node) lookupConf(ctx context.Context, out *fuse.EntryOut) (ch *fs.Inode
 	// Get unique inode number
 	rn.inoMap.TranslateStat(&st)
 	out.Attr.FromStat(&st)
+	if rn.args.ForceOwner != nil {
+		out.Owner = *rn.args.ForceOwner
+	}
 	// Create child node
 	id := rn.uniqueStableAttr(uint32(st.Mode), st.Ino)
 	node := &VirtualConfNode{path: p}
diff --git a/internal/fusefrontend_reverse/virtualconf.go b/internal/fusefrontend_reverse/virtualconf.go
index 3643fad..ea358dd 100644
--- a/internal/fusefrontend_reverse/virtualconf.go
+++ b/internal/fusefrontend_reverse/virtualconf.go
@@ -18,6 +18,11 @@ type VirtualConfNode struct {
 	path string
 }
 
+// rootNode returns the Root Node of the filesystem.
+func (n *VirtualConfNode) rootNode() *RootNode {
+	return n.Root().Operations().(*RootNode)
+}
+
 func (n *VirtualConfNode) Open(ctx context.Context, flags uint32) (fh fs.FileHandle, fuseFlags uint32, errno syscall.Errno) {
 	fd, err := syscall.Open(n.path, syscall.O_RDONLY, 0)
 	if err != nil {
@@ -35,6 +40,10 @@ func (n *VirtualConfNode) Getattr(ctx context.Context, fh fs.FileHandle, out *fu
 		return fs.ToErrno(err)
 	}
 	out.FromStat(&st)
+	rn := n.rootNode()
+	if rn.args.ForceOwner != nil {
+		out.Owner = *rn.args.ForceOwner
+	}
 	return 0
 }
 
diff --git a/internal/fusefrontend_reverse/virtualnode.go b/internal/fusefrontend_reverse/virtualnode.go
index 922cfa7..732564a 100644
--- a/internal/fusefrontend_reverse/virtualnode.go
+++ b/internal/fusefrontend_reverse/virtualnode.go
@@ -100,7 +100,9 @@ func (n *Node) newVirtualMemNode(content []byte, parentStat *syscall.Stat_t, ino
 	st.Nlink = 1
 	var a fuse.Attr
 	a.FromStat(st)
-
+	if rn.args.ForceOwner != nil {
+		a.Owner = *rn.args.ForceOwner
+	}
 	vf = &VirtualMemNode{content: content, attr: a}
 	return
 }
-- 
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