add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/security/apparmor/include/path.h
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@@ -1,3 +1,4 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * AppArmor security module
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  *
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@@ -5,16 +6,10 @@
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  *
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  * Copyright (C) 1998-2008 Novell/SUSE
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  * Copyright 2009-2010 Canonical Ltd.
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License as
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- * published by the Free Software Foundation, version 2 of the
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- * License.
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  */
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 #ifndef __AA_PATH_H
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 #define __AA_PATH_H
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-
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 enum path_flags {
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 	PATH_IS_DIR = 0x1,		/* path is a directory */
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@@ -30,51 +25,8 @@
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 		 const char **name, const char **info,
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 		 const char *disconnected);
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-#define MAX_PATH_BUFFERS 2
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-
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-/* Per cpu buffers used during mediation */
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-/* preallocated buffers to use during path lookups */
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-struct aa_buffers {
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-	char *buf[MAX_PATH_BUFFERS];
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-};
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-
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-#include <linux/percpu.h>
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-#include <linux/preempt.h>
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-
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-DECLARE_PER_CPU(struct aa_buffers, aa_buffers);
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-
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-#define ASSIGN(FN, A, X, N) ((X) = FN(A, N))
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-#define EVAL1(FN, A, X) ASSIGN(FN, A, X, 0) /*X = FN(0)*/
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-#define EVAL2(FN, A, X, Y...)	\
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-	do { ASSIGN(FN, A, X, 1);  EVAL1(FN, A, Y); } while (0)
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-#define EVAL(FN, A, X...) CONCATENATE(EVAL, COUNT_ARGS(X))(FN, A, X)
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-
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-#define for_each_cpu_buffer(I) for ((I) = 0; (I) < MAX_PATH_BUFFERS; (I)++)
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-
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-#ifdef CONFIG_DEBUG_PREEMPT
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-#define AA_BUG_PREEMPT_ENABLED(X) AA_BUG(preempt_count() <= 0, X)
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-#else
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-#define AA_BUG_PREEMPT_ENABLED(X) /* nop */
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-#endif
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-
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-#define __get_buffer(C, N) ({						\
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-	AA_BUG_PREEMPT_ENABLED("__get_buffer without preempt disabled");  \
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-	(C)->buf[(N)]; })
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-
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-#define __get_buffers(C, X...)    EVAL(__get_buffer, C, X)
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-
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-#define __put_buffers(X, Y...) ((void)&(X))
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-
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-#define get_buffers(X...)						\
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-do {									\
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-	struct aa_buffers *__cpu_var = get_cpu_ptr(&aa_buffers);	\
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-	__get_buffers(__cpu_var, X);					\
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-} while (0)
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-
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-#define put_buffers(X, Y...)		\
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-do {					\
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-	__put_buffers(X, Y);		\
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-	put_cpu_ptr(&aa_buffers);	\
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-} while (0)
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+#define IN_ATOMIC true
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+char *aa_get_buffer(bool in_atomic);
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+void aa_put_buffer(char *buf);
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 #endif /* __AA_PATH_H */