first commit

1 files changed, 105 insertions, 0 deletions

diff --git a/security/apparmor/lib.c b/security/apparmor/lib.c
new file mode 100644
index 000000000..ce8d9a84a
--- /dev/null
+++ b/security/apparmor/lib.c
@@ -0,0 +1,105 @@
+/*
+ * AppArmor security module
+ *
+ * This file contains basic common functions used in AppArmor
+ *
+ * Copyright (C) 1998-2008 Novell/SUSE
+ * Copyright 2009-2010 Canonical Ltd.
+ *
+ * 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 <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/vmalloc.h>
+
+#include "include/audit.h"
+#include "include/apparmor.h"
+
+
+/**
+ * aa_split_fqname - split a fqname into a profile and namespace name
+ * @fqname: a full qualified name in namespace profile format (NOT NULL)
+ * @ns_name: pointer to portion of the string containing the ns name (NOT NULL)
+ *
+ * Returns: profile name or NULL if one is not specified
+ *
+ * Split a namespace name from a profile name (see policy.c for naming
+ * description).  If a portion of the name is missing it returns NULL for
+ * that portion.
+ *
+ * NOTE: may modify the @fqname string.  The pointers returned point
+ *       into the @fqname string.
+ */
+char *aa_split_fqname(char *fqname, char **ns_name)
+{
+	char *name = strim(fqname);
+
+	*ns_name = NULL;
+	if (name[0] == ':') {
+		char *split = strchr(&name[1], ':');
+		*ns_name = skip_spaces(&name[1]);
+		if (split) {
+			/* overwrite ':' with \0 */
+			*split = 0;
+			name = skip_spaces(split + 1);
+		} else
+			/* a ns name without a following profile is allowed */
+			name = NULL;
+	}
+	if (name && *name == 0)
+		name = NULL;
+
+	return name;
+}
+
+/**
+ * aa_info_message - log a none profile related status message
+ * @str: message to log
+ */
+void aa_info_message(const char *str)
+{
+	if (audit_enabled) {
+		struct common_audit_data sa;
+		struct apparmor_audit_data aad = {0,};
+		sa.type = LSM_AUDIT_DATA_NONE;
+		sa.aad = &aad;
+		aad.info = str;
+		aa_audit_msg(AUDIT_APPARMOR_STATUS, &sa, NULL);
+	}
+	printk(KERN_INFO "AppArmor: %s\n", str);
+}
+
+/**
+ * kvmalloc - do allocation preferring kmalloc but falling back to vmalloc
+ * @size: size of allocation
+ *
+ * Return: allocated buffer or NULL if failed
+ *
+ * It is possible that policy being loaded from the user is larger than
+ * what can be allocated by kmalloc, in those cases fall back to vmalloc.
+ */
+void *kvmalloc(size_t size)
+{
+	void *buffer = NULL;
+
+	if (size == 0)
+		return NULL;
+
+	/* do not attempt kmalloc if we need more than 16 pages at once */
+	if (size <= (16*PAGE_SIZE))
+		buffer = kmalloc(size, GFP_NOIO | __GFP_NOWARN);
+	if (!buffer) {
+		/* see kvfree for why size must be at least work_struct size
+		 * when allocated via vmalloc
+		 */
+		if (size < sizeof(struct work_struct))
+			size = sizeof(struct work_struct);
+		buffer = vmalloc(size);
+	}
+	return buffer;
+}