sysfs sample

executer/kernel/mcctrl/sysfs_files.c

@@ -0,0 +1,68 @@
+/**
+ * \file sysfs_files.c
+ *  License details are found in the file LICENSE.
+ * \brief
+ *  implement McKernel's sysfs files, IHK-Master side
+ * \author Gou Nakamura  <go.nakamura.yw@hitachi-solutions.com> \par
+ * 	Copyright (C) 2016  RIKEN AICS
+ */
+/*
+ * HISTORY:
+ */
+
+#include <linux/kernel.h>
+#include "mcctrl.h"
+#include "sysfs_msg.h"
+
+#define dprintk(...) do { if (0) printk(KERN_DEBUG __VA_ARGS__); } while (0)
+#define wprintk(...) do { if (1) printk(KERN_WARNING __VA_ARGS__); } while (0)
+#define eprintk(...) do { if (1) printk(KERN_ERR __VA_ARGS__); } while (0)
+
+static ssize_t
+show_int(struct sysfsm_ops *ops, void *instance, void *buf, size_t size)
+{
+	int *p = instance;
+
+	return snprintf(buf, size, "%d\n", *p);
+} /* show_int() */
+
+struct sysfsm_ops show_int_ops = {
+	.show = &show_int,
+};
+
+void setup_sysfs_files(ihk_os_t os)
+{
+	static int a_value = 35;
+	int error;
+	struct sysfs_handle handle;
+
+	error = sysfsm_mkdirf(os, NULL, "/sys/test/x.dir");
+	if (error) {
+		panic("sysfsm_mkdir(x.dir)");
+	}
+
+	error = sysfsm_createf(os, &show_int_ops, &a_value, 0444,
+			"/sys/test/a.dir/a_value");
+	if (error) {
+		panic("sysfsm_createf");
+	}
+
+	error = sysfsm_lookupf(os, &handle, "/sys/test/%s", "a.dir");
+	if (error) {
+		panic("sysfsm_lookupf(a.dir)");
+	}
+
+	error = sysfsm_symlinkf(os, handle, "/sys/test/%c.dir", 'L');
+	if (error) {
+		panic("sysfsm_symlinkf");
+	}
+
+	error = sysfsm_unlinkf(os, 0, "/sys/test/%s.dir", "x");
+	if (error) {
+		panic("sysfsm_unlinkf");
+	}
+
+	return;
+} /* setup_files() */
+
+/**** End of File ****/