1 files changed, 52 insertions, 0 deletions
diff --git a/tools/usb/usbip/src/utils.c b/tools/usb/usbip/src/utils.c
new file mode 100644
index 000000000000..2b3d6d235015
--- /dev/null
+++ b/tools/usb/usbip/src/utils.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
+ *               2005-2007 Takahiro Hirofuchi
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#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;
+
+	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)
+		snprintf(command, SYSFS_BUS_ID_SIZE + 4, "add %s", busid);
+	else
+		snprintf(command, SYSFS_BUS_ID_SIZE + 4, "del %s", busid);
+
+	rc = write_sysfs_attribute(match_busid_attr_path, command,
+				   sizeof(command));
+	if (rc < 0) {
+		dbg("failed to write match_busid: %s", strerror(errno));
+		return -1;
+	}
+
+	return 0;
+}