From: Sungbae Yoo <sungbae.yoo@samsung.com>
Date: Tue, 11 Apr 2017 05:57:39 +0000 (+0900)
Subject: [SECIOTSW-454] Add skeleton codes for command/data path in sysfs
X-Git-Tag: submit/tizen/20171212.052346~17
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=16259fda161b183f7403df041036592568eb85df;p=platform%2Fcore%2Fsecurity%2Faudit-trail.git

[SECIOTSW-454] Add skeleton codes for command/data path in sysfs

Change-Id: I3a08c8c830f1378734ae638ea5785e48267bc5e5
Signed-off-by: Sungbae Yoo <sungbae.yoo@samsung.com>
---

diff --git a/audittrail/Makefile b/audittrail/Makefile
index e4abc09..956d763 100644
--- a/audittrail/Makefile
+++ b/audittrail/Makefile
@@ -1,2 +1,3 @@
 obj-$(CONFIG_AUDITTRAIL) = audittrail.o
 audittrail-objs += main.o
+audittrail-objs += dir.o
diff --git a/audittrail/dir.c b/audittrail/dir.c
new file mode 100644
index 0000000..9f7455a
--- /dev/null
+++ b/audittrail/dir.c
@@ -0,0 +1,114 @@
+/*
+ *  Copyright (c) 2017 Samsung Electronics Co., Ltd All Rights Reserved
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+#include <linux/fs.h>
+#include <linux/security.h>
+
+#include "log.h"
+#include "dir.h"
+
+static struct dentry *audittrail_dir = NULL;
+static struct dentry *audittrail_command = NULL;
+static struct dentry *audittrail_buffer = NULL;
+
+static int audittrail_command_open(struct inode * inode, struct file *file)
+{
+	if ((file->f_flags & O_ACCMODE) != O_WRONLY)
+		return -EACCES;
+
+	return 0;
+}
+
+static ssize_t audittrail_command_write(struct file *file, const char __user *buf,
+									size_t datalen, loff_t *ppos)
+{
+	return -EINVAL;
+}
+
+static const struct file_operations audittrail_command_ops = {
+	.open = audittrail_command_open,
+	.write = audittrail_command_write,
+};
+
+static int audittrail_buffer_open(struct inode * inode, struct file *file)
+{
+	return 0;
+}
+
+static ssize_t audittrail_buffer_read(struct file *file,
+									char __user *buf,
+									size_t datalen, loff_t *ppos)
+{
+	return -EINVAL;
+}
+
+static ssize_t audittrail_buffer_write(struct file *file,
+									const char __user *buf,
+									size_t datalen, loff_t *ppos)
+{
+	return -EINVAL;
+}
+
+static int audittrail_buffer_release(struct inode *inode, struct file *file)
+{
+	return 0;
+}
+
+static const struct file_operations audittrail_buffer_ops = {
+	.open = audittrail_buffer_open,
+	.read = audittrail_buffer_read,
+	.write = audittrail_buffer_write,
+	.release = audittrail_buffer_release,
+};
+
+
+int audittrail_dir_create(void)
+{
+	audittrail_dir = securityfs_create_dir("audittrail", NULL);
+	if (IS_ERR(audittrail_dir))
+		goto err;
+
+	audittrail_command =
+		securityfs_create_file("command",
+								S_IWUSR | S_IWGRP, audittrail_dir, NULL,
+								&audittrail_command_ops);
+	if (IS_ERR(audittrail_command))
+		goto err;
+
+	audittrail_buffer =
+		securityfs_create_file("buffer",
+								S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP,
+								audittrail_dir, NULL,
+								&audittrail_buffer_ops);
+	if (IS_ERR(audittrail_buffer))
+		goto err;
+
+	return 0;
+
+err:
+	audittrail_dir_destroy();
+	return -1;
+}
+
+void audittrail_dir_destroy(void)
+{
+	securityfs_remove(audittrail_buffer);
+	securityfs_remove(audittrail_command);
+	securityfs_remove(audittrail_dir);
+}
diff --git a/audittrail/dir.h b/audittrail/dir.h
new file mode 100644
index 0000000..b492179
--- /dev/null
+++ b/audittrail/dir.h
@@ -0,0 +1,25 @@
+/*
+ *  Copyright (c) 2017 Samsung Electronics Co., Ltd All Rights Reserved
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+#ifndef __AUDITTRAIL_DIR_H__
+#define __AUDITTRAIL_DIR_H__
+
+int audittrail_dir_create(void);
+void audittrail_dir_destroy(void);
+
+#endif  //! __AUDITTRAIL_DIR_H__
diff --git a/audittrail/main.c b/audittrail/main.c
index 047c165..2eb82e3 100644
--- a/audittrail/main.c
+++ b/audittrail/main.c
@@ -19,16 +19,26 @@
 #include <linux/module.h>
 
 #include "log.h"
+#include "dir.h"
 
 int audittrail_init(void)
 {
 	AUDITTRAIL_INFO("loaded");
 
+	if (audittrail_dir_create() != 0) {
+		AUDITTRAIL_ERROR("failed to create auditfs");
+		return -1;
+	}
+
+	AUDITTRAIL_INFO("auditfs ready");
+
 	return 0;
 }
 
 void audittrail_exit(void)
 {
+	audittrail_dir_destroy();
+
 	AUDITTRAIL_INFO("unloaded");
 }