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Date: Tue, 12 Sep 2006 10:57:52 -0700
From: Kylene Jo Hall <kjhall@...ibm.com>
To: linux-kernel <linux-kernel@...r.kernel.org>,
LSM ML <linux-security-module@...r.kernel.org>
Cc: Dave Safford <safford@...ibm.com>, Mimi Zohar <zohar@...ibm.com>,
Serge Hallyn <sergeh@...ibm.com>, akpm@...l.org
Subject: [PATCH 4/7] SLIM: secfs patch
This patch provides the securityfs used by SLIM.
Signed-off-by: Mimi Zohar <zohar@...ibm.com>
Signed-off-by: Kylene Hall <kjhall@...ibm.com>
---
security/slim/slm_secfs.c | 73 ++++++++++++++++++++++++++++++++++++
1 files changed, 73 insertions(+)
--- linux-2.6.18/security/slim/slm_secfs.c 1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.17-working/security/slim/slm_secfs.c 2006-09-06 11:49:09.000000000 -0700
@@ -0,0 +1,73 @@
+/*
+ * SLIM securityfs support: debugging control files
+ *
+ * Copyright (C) 2005, 2006 IBM Corporation
+ * Author: Mimi Zohar <zohar@...ibm.com>
+ * Kylene Hall <kjhall@...ibm.com>
+ *
+ * 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, version 2 of the License.
+ */
+
+#include <asm/uaccess.h>
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/security.h>
+#include <linux/debugfs.h>
+#include "slim.h"
+
+static struct dentry *slim_sec_dir, *slim_level;
+
+static ssize_t slm_read_level(struct file *file, char __user *buf,
+ size_t buflen, loff_t *ppos)
+{
+ struct slm_tsec_data *cur_tsec = current->security;
+ ssize_t len;
+ char data[28];
+ if (is_kernel_thread(current))
+ len = snprintf(data, sizeof(data), "KERNEL\n");
+ else if (!cur_tsec)
+ len = snprintf(data, sizeof(data), "UNKNOWN\n");
+ else {
+ if (cur_tsec->iac_wx != cur_tsec->iac_r)
+ len = snprintf(data, sizeof(data), "GUARD wx:%s r:%s\n",
+ slm_iac_str[cur_tsec->iac_wx],
+ slm_iac_str[cur_tsec->iac_r]);
+ else
+ len = snprintf(data, sizeof(data), "%s\n",
+ slm_iac_str[cur_tsec->iac_wx]);
+ }
+ return simple_read_from_buffer(buf, buflen, ppos, data, len);
+}
+
+static struct file_operations slm_level_ops = {
+ .read = slm_read_level,
+};
+
+int __init slm_init_secfs(void)
+{
+ if (!slim_enabled)
+ return 0;
+
+ slim_sec_dir = securityfs_create_dir("slim", NULL);
+ if (!slim_sec_dir || IS_ERR(slim_sec_dir))
+ return -EFAULT;
+ slim_level = securityfs_create_file("level", S_IRUGO,
+ slim_sec_dir, NULL, &slm_level_ops);
+ if (!slim_level || IS_ERR(slim_level)) {
+ securityfs_remove(slim_sec_dir);
+ return -EFAULT;
+ }
+ return 0;
+}
+
+__initcall(slm_init_secfs);
+
+void __exit slm_cleanup_secfs(void)
+{
+ securityfs_remove(slim_level);
+ securityfs_remove(slim_sec_dir);
+}
+
-
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