1 files changed, 62 insertions, 0 deletions
diff --git a/extras/multipath-tools/multipathd/checkers.c b/extras/multipath-tools/multipathd/checkers.c
new file mode 100644
index 0000000000..7ad32b04e9
--- /dev/null
+++ b/extras/multipath-tools/multipathd/checkers.c
@@ -0,0 +1,62 @@
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+
+#include "sg_include.h"
+
+#define TUR_CMD_LEN      6
+
+/*
+ * test IO functions : add yours here
+ *
+ * returns 0 : path gone valid
+ * returns 1 : path still failed
+ */
+
+int readsector0 (char *devnode)
+{
+	int fd, r;
+	char buf;
+
+	fd = open (devnode, O_RDONLY);
+	if (read (fd, &buf, 1) != 1)
+		r = 0;
+	else
+		r = 1;
+	
+	close (fd);
+
+	return r;
+}
+
+int tur(char *devnode)
+{
+        unsigned char turCmdBlk[TUR_CMD_LEN] = { 0x00, 0, 0, 0, 0, 0 };
+        struct sg_io_hdr io_hdr;
+        unsigned char sense_buffer[32];
+	int fd;
+
+	fd = open (devnode, O_RDONLY);
+
+        memset(&io_hdr, 0, sizeof (struct sg_io_hdr));
+        io_hdr.interface_id = 'S';
+        io_hdr.cmd_len = sizeof (turCmdBlk);
+        io_hdr.mx_sb_len = sizeof (sense_buffer);
+        io_hdr.dxfer_direction = SG_DXFER_NONE;
+        io_hdr.cmdp = turCmdBlk;
+        io_hdr.sbp = sense_buffer;
+        io_hdr.timeout = 20000;
+        io_hdr.pack_id = 0;
+        if (ioctl(fd, SG_IO, &io_hdr) < 0) {
+                close(fd);
+                return 0;
+        }
+        if (io_hdr.info & SG_INFO_OK_MASK) {
+                return 0;
+        }
+        return 1;
+}