Add device number support

conversions.go

@@ -191,6 +191,7 @@ func convertInMessage(
 			Parent:    fuseops.InodeID(inMsg.Header().Nodeid),
 			Name:      string(name),
 			Mode:      convertFileMode(in.Mode),
+			Rdev:      in.Rdev,
 			OpContext: fuseops.OpContext{Pid: inMsg.Header().Pid},
 		}
 
@@ -925,6 +926,10 @@ func convertAttributes(
 	if in.Mode&os.ModeSticky != 0 {
 		out.Mode |= syscall.S_ISVTX
 	}
+
+	if out.Mode & (syscall.S_IFCHR | syscall.S_IFBLK) != 0 {
+		out.Rdev = in.Rdev
+	}
 }
 
 // Convert an absolute cache expiration time to a relative time from now for

fuseops/ops.go

@@ -301,6 +301,9 @@ type MkNodeOp struct {
 	Name string
 	Mode os.FileMode
 
+	// The device number (only valid if created file is a device)
+	Rdev uint32
+
 	// Set by the file system: information about the inode that was created.
 	//
 	// The lookup count for the inode is implicitly incremented. See notes on

fuseops/simple_types.go

@@ -87,6 +87,9 @@ type InodeAttributes struct {
 	//
 	Mode os.FileMode
 
+	// The device number. Only valid if the file is a device
+	Rdev uint32
+
 	// Time information. See `man 2 stat` for full details.
 	Atime  time.Time // Time of last access
 	Mtime  time.Time // Time of last modification