From 46131086e1003745c66feeb529948b8d4b39e8de Mon Sep 17 00:00:00 2001
From: Mounir IDRASSI <mounir.idrassi@amcrypto.jp>
Date: Sat, 16 May 2026 13:11:20 +0900
Subject: [PATCH] Linux/FUSE: honor inodes and map unknown errors to EIO

Enable use_ino for Linux FUSE mounts so stable inode numbers returned by getattr and readdir are reported to userspace. For FUSE3, set fuse_config.use_ino from init; for FUSE2, pass -o use_ino because there is no fuse_config init hook.

Also map otherwise unhandled FUSE exceptions to EIO instead of EINTR, since these failures are not signal interruptions and should not encourage retry loops.
---
 src/Driver/Fuse/FuseService.cpp | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/Driver/Fuse/FuseService.cpp b/src/Driver/Fuse/FuseService.cpp
index 578fbee8..c0962211 100644
--- a/src/Driver/Fuse/FuseService.cpp
+++ b/src/Driver/Fuse/FuseService.cpp
@@ -150,6 +150,8 @@ namespace VeraCrypt
 			cfg->set_gid = 1;
 			cfg->uid = FuseService::GetUserId();
 			cfg->gid = FuseService::GetGroupId();
+
+			cfg->use_ino = 1;
 		}
 
 		return fuse_service_init_common ();
@@ -582,12 +584,12 @@ namespace VeraCrypt
 		catch (std::exception &e)
 		{
 			SystemLog::WriteException (e);
-			return -EINTR;
+			return -EIO;
 		}
 		catch (...)
 		{
 			SystemLog::WriteException (UnknownException (SRC_POS));
-			return -EINTR;
+			return -EIO;
 		}
 	}
 
@@ -677,6 +679,12 @@ namespace VeraCrypt
 			args.push_back ("allow_other");
 		}
 
+#if defined(TC_LINUX) && !defined(VC_FUSE3)
+		// FUSE2 has no fuse_config init hook; pass the mount option instead.
+		args.push_back ("-o");
+		args.push_back ("use_ino");
+#endif
+
 		ExecFunctor execFunctor (openVolume, slotNumber);
 		Process::Execute ("fuse", args, -1, &execFunctor);