1 files changed, 43 insertions, 0 deletions
diff --git a/tools/usb/usbip/src/utils.c b/tools/usb/usbip/src/utils.c
new file mode 100644
index 0000000000..76a2e1247f
--- /dev/null
+++ b/tools/usb/usbip/src/utils.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
+ *               2005-2007 Takahiro Hirofuchi
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "usbip_common.h"
+#include "utils.h"
+#include "sysfs_utils.h"
+
+int modify_match_busid(char *busid, int add)
+{
+	char attr_name[] = "match_busid";
+	char command[SYSFS_BUS_ID_SIZE + 4];
+	char match_busid_attr_path[SYSFS_PATH_MAX];
+	int rc;
+	int cmd_size;
+
+	snprintf(match_busid_attr_path, sizeof(match_busid_attr_path),
+		 "%s/%s/%s/%s/%s/%s", SYSFS_MNT_PATH, SYSFS_BUS_NAME,
+		 SYSFS_BUS_TYPE, SYSFS_DRIVERS_NAME, USBIP_HOST_DRV_NAME,
+		 attr_name);
+
+	if (add)
+		cmd_size = snprintf(command, SYSFS_BUS_ID_SIZE + 4, "add %s",
+				    busid);
+	else
+		cmd_size = snprintf(command, SYSFS_BUS_ID_SIZE + 4, "del %s",
+				    busid);
+
+	rc = write_sysfs_attribute(match_busid_attr_path, command,
+				   cmd_size);
+	if (rc < 0) {
+		dbg("failed to write match_busid: %s", strerror(errno));
+		return -1;
+	}
+
+	return 0;
+}