1 files changed, 80 insertions, 0 deletions
diff --git a/security/apparmor/include/path.h b/security/apparmor/include/path.h
new file mode 100644
index 000000000..b6380c5f0
--- /dev/null
+++ b/security/apparmor/include/path.h
@@ -0,0 +1,80 @@
+/*
+ * AppArmor security module
+ *
+ * This file contains AppArmor basic path manipulation function definitions.
+ *
+ * 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.
+ */
+
+#ifndef __AA_PATH_H
+#define __AA_PATH_H
+
+
+enum path_flags {
+	PATH_IS_DIR = 0x1,		/* path is a directory */
+	PATH_CONNECT_PATH = 0x4,	/* connect disconnected paths to / */
+	PATH_CHROOT_REL = 0x8,		/* do path lookup relative to chroot */
+	PATH_CHROOT_NSCONNECT = 0x10,	/* connect paths that are at ns root */
+
+	PATH_DELEGATE_DELETED = 0x08000, /* delegate deleted files */
+	PATH_MEDIATE_DELETED = 0x10000,	 /* mediate deleted paths */
+};
+
+int aa_path_name(const struct path *path, int flags, char *buffer,
+		 const char **name, const char **info,
+		 const char *disconnected);
+
+#define MAX_PATH_BUFFERS 2
+
+/* Per cpu buffers used during mediation */
+/* preallocated buffers to use during path lookups */
+struct aa_buffers {
+	char *buf[MAX_PATH_BUFFERS];
+};
+
+#include <linux/percpu.h>
+#include <linux/preempt.h>
+
+DECLARE_PER_CPU(struct aa_buffers, aa_buffers);
+
+#define ASSIGN(FN, A, X, N) ((X) = FN(A, N))
+#define EVAL1(FN, A, X) ASSIGN(FN, A, X, 0) /*X = FN(0)*/
+#define EVAL2(FN, A, X, Y...)	\
+	do { ASSIGN(FN, A, X, 1);  EVAL1(FN, A, Y); } while (0)
+#define EVAL(FN, A, X...) CONCATENATE(EVAL, COUNT_ARGS(X))(FN, A, X)
+
+#define for_each_cpu_buffer(I) for ((I) = 0; (I) < MAX_PATH_BUFFERS; (I)++)
+
+#ifdef CONFIG_DEBUG_PREEMPT
+#define AA_BUG_PREEMPT_ENABLED(X) AA_BUG(preempt_count() <= 0, X)
+#else
+#define AA_BUG_PREEMPT_ENABLED(X) /* nop */
+#endif
+
+#define __get_buffer(C, N) ({						\
+	AA_BUG_PREEMPT_ENABLED("__get_buffer without preempt disabled");  \
+	(C)->buf[(N)]; })
+
+#define __get_buffers(C, X...)    EVAL(__get_buffer, C, X)
+
+#define __put_buffers(X, Y...) ((void)&(X))
+
+#define get_buffers(X...)						\
+do {									\
+	struct aa_buffers *__cpu_var = get_cpu_ptr(&aa_buffers);	\
+	__get_buffers(__cpu_var, X);					\
+} while (0)
+
+#define put_buffers(X, Y...)		\
+do {					\
+	__put_buffers(X, Y);		\
+	put_cpu_ptr(&aa_buffers);	\
+} while (0)
+
+#endif /* __AA_PATH_H */