From 1ffe7401530294ad404ea3821e0fab4b2037a392 Mon Sep 17 00:00:00 2001
From: NAKAMURA Gou <go.nakamura.yw@hitachi-solutions.com>
Date: Tue, 26 Jan 2016 17:56:53 +0900
Subject: [PATCH] sysfs sample

---
 executer/kernel/mcctrl/Makefile.in   |  3 +-
 executer/kernel/mcctrl/mcctrl.h      |  4 ++
 executer/kernel/mcctrl/sysfs.c       |  2 +
 executer/kernel/mcctrl/sysfs_files.c | 68 ++++++++++++++++++++++++++++
 4 files changed, 76 insertions(+), 1 deletion(-)
 create mode 100644 executer/kernel/mcctrl/sysfs_files.c

diff --git a/executer/kernel/mcctrl/Makefile.in b/executer/kernel/mcctrl/Makefile.in
index 02d94d54..a1af82ea 100644
--- a/executer/kernel/mcctrl/Makefile.in
+++ b/executer/kernel/mcctrl/Makefile.in
@@ -9,7 +9,8 @@ obj-m += mcctrl.o
 
 ccflags-y := -I$(IHK_BASE)/linux/include -I$(IHK_BASE)/ikc/include -I$(IHK_BASE)/include -I$(src)/../../include -mcmodel=kernel -mno-red-zone -DMCEXEC_PATH=\"$(BINDIR)/mcexec\"
 
-mcctrl-y := driver.o control.o ikc.o syscall.o procfs.o binfmt_mcexec.o sysfs.o
+mcctrl-y := driver.o control.o ikc.o syscall.o procfs.o binfmt_mcexec.o
+mcctrl-y += sysfs.o sysfs_files.o
 
 KBUILD_EXTRA_SYMBOLS = @abs_builddir@/../../../../ihk/linux/core/Module.symvers
 
diff --git a/executer/kernel/mcctrl/mcctrl.h b/executer/kernel/mcctrl/mcctrl.h
index 84cb033a..abd0d1bc 100644
--- a/executer/kernel/mcctrl/mcctrl.h
+++ b/executer/kernel/mcctrl/mcctrl.h
@@ -32,6 +32,7 @@
 #ifndef HEADER_MCCTRL_H
 #define HEADER_MCCTRL_H
 
+#include <linux/fs.h>
 #include <ihk/ihk_host_driver.h>
 #include <linux/resource.h>
 #include <uprotocol.h>
@@ -252,4 +253,7 @@ struct procfs_file {
 	char fname[PROCFS_NAME_MAX];	/* procfs filename (request) */
 };
 
+/* sysfs_files.c */
+void setup_sysfs_files(ihk_os_t os);
+
 #endif
diff --git a/executer/kernel/mcctrl/sysfs.c b/executer/kernel/mcctrl/sysfs.c
index 4e975cf1..8c083e96 100644
--- a/executer/kernel/mcctrl/sysfs.c
+++ b/executer/kernel/mcctrl/sysfs.c
@@ -1302,6 +1302,8 @@ sysfsm_setup(ihk_os_t os, void *buf, long buf_pa, size_t bufsize)
 	wmb();
 	sdp->sysfs_buf = buf;
 
+	setup_sysfs_files(os);
+
 	error = 0;
 out:
 	if (error) {
diff --git a/executer/kernel/mcctrl/sysfs_files.c b/executer/kernel/mcctrl/sysfs_files.c
new file mode 100644
index 00000000..3863cdb2
--- /dev/null
+++ b/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 ****/