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b886d83c5b
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 315 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Armijn Hemel <armijn@tjaldur.nl> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190531190115.503150771@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/* 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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* This file contains AppArmor basic path manipulation function definitions.
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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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#ifndef __AA_PATH_H
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#define __AA_PATH_H
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enum path_flags {
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PATH_IS_DIR = 0x1, /* path is a directory */
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PATH_CONNECT_PATH = 0x4, /* connect disconnected paths to / */
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PATH_CHROOT_REL = 0x8, /* do path lookup relative to chroot */
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PATH_CHROOT_NSCONNECT = 0x10, /* connect paths that are at ns root */
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PATH_DELEGATE_DELETED = 0x08000, /* delegate deleted files */
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PATH_MEDIATE_DELETED = 0x10000, /* mediate deleted paths */
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};
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int aa_path_name(const struct path *path, int flags, char *buffer,
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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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/* 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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#include <linux/percpu.h>
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#include <linux/preempt.h>
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DECLARE_PER_CPU(struct aa_buffers, aa_buffers);
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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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#define for_each_cpu_buffer(I) for ((I) = 0; (I) < MAX_PATH_BUFFERS; (I)++)
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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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#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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#define __get_buffers(C, X...) EVAL(__get_buffer, C, X)
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#define __put_buffers(X, Y...) ((void)&(X))
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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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#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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#endif /* __AA_PATH_H */
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