From 86891054ef2a5d1b0b59c7c140aae284e7c5bd87 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Mon, 11 Nov 2024 22:27:42 +0100
Subject: Report inode number for the root node

Now that https://github.com/hanwen/go-fuse/issues/399 has
landed we can report an inode number for the root node.

Fixes https://github.com/rfjakob/gocryptfs/issues/580
---
 internal/fusefrontend/root_node.go | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

(limited to 'internal/fusefrontend/root_node.go')

diff --git a/internal/fusefrontend/root_node.go b/internal/fusefrontend/root_node.go
index 39cdef7..ac814ad 100644
--- a/internal/fusefrontend/root_node.go
+++ b/internal/fusefrontend/root_node.go
@@ -59,13 +59,16 @@ type RootNode struct {
 	// quirks is a bitmap that enables workaround for quirks in the filesystem
 	// backing the cipherdir
 	quirks uint64
+	// rootIno is the inode number that we report for the root node on mount
+	rootIno uint64
 }
 
 func NewRootNode(args Args, c *contentenc.ContentEnc, n *nametransform.NameTransform) *RootNode {
 	var rootDev uint64
 	var st syscall.Stat_t
-	if err := syscall.Stat(args.Cipherdir, &st); err != nil {
-		tlog.Warn.Printf("Could not stat backing directory %q: %v", args.Cipherdir, err)
+	var statErr error
+	if statErr = syscall.Stat(args.Cipherdir, &st); statErr != nil {
+		tlog.Warn.Printf("Could not stat backing directory %q: %v", args.Cipherdir, statErr)
 	} else {
 		rootDev = uint64(st.Dev)
 	}
@@ -87,6 +90,10 @@ func NewRootNode(args Args, c *contentenc.ContentEnc, n *nametransform.NameTrans
 		dirCache:      dirCache{ivLen: ivLen},
 		quirks:        syscallcompat.DetectQuirks(args.Cipherdir),
 	}
+	if statErr == nil {
+		rn.inoMap.TranslateStat(&st)
+		rn.rootIno = st.Ino
+	}
 	return rn
 }
 
@@ -288,3 +295,7 @@ func (rn *RootNode) decryptXattrName(cAttr string) (attr string, err error) {
 	}
 	return attr, nil
 }
+
+func (rn *RootNode) RootIno() uint64 {
+	return rn.rootIno
+}
-- 
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