imsm: initial Intel(R) Matrix Storage Manager support

[thirdparty/mdadm.git] / sg_io.c

diff --git a/sg_io.c b/sg_io.c
new file mode 100644 (file)
index 0000000..4ae5d92
--- /dev/null
+++ b/sg_io.c
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2007 Intel Corporation
+ *
+ *     Retrieve drive serial numbers for scsi disks
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#include <string.h>
+#include <scsi/scsi.h>
+#include <scsi/sg.h>
+#include <sys/ioctl.h>
+
+int scsi_get_serial(int fd, void *buf, size_t buf_len)
+{
+       unsigned char inq_cmd[] = {INQUIRY, 1, 0x80, 0, buf_len, 0};
+       unsigned char sense[32];
+       struct sg_io_hdr io_hdr;
+
+       memset(&io_hdr, 0, sizeof(io_hdr));
+       io_hdr.interface_id = 'S';
+       io_hdr.cmdp = inq_cmd;
+       io_hdr.cmd_len = sizeof(inq_cmd);
+       io_hdr.dxferp = buf;
+       io_hdr.dxfer_len = buf_len;
+       io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
+       io_hdr.sbp = sense;
+       io_hdr.mx_sb_len = sizeof(sense);
+       io_hdr.timeout = 5000;
+
+       return ioctl(fd, SG_IO, &io_hdr);
+}