Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754514AbcL3W6G (ORCPT ); Fri, 30 Dec 2016 17:58:06 -0500 Received: from mo4-p00-ob.smtp.rzone.de ([81.169.146.163]:27850 "EHLO mo4-p00-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754189AbcL3W6E (ORCPT ); Fri, 30 Dec 2016 17:58:04 -0500 X-RZG-AUTH: :OH8QVVOrc/CP6za/qRmbF3BWedPGA1vjs2ejZCzW8NRdwTYefHi0L5RzHLEjAZn5asq7vKs= X-RZG-CLASS-ID: mo00 From: Thomas Schoebel-Theuer To: linux-kernel@vger.kernel.org, tst@schoebel-theuer.de Subject: [RFC 04/32] mars: add new module brick_checking Date: Fri, 30 Dec 2016 23:57:30 +0100 Message-Id: <1c38963aa608005db8abadedca8e0624faf92cf7.1483138400.git.tst@schoebel-theuer.de> X-Mailer: git-send-email 2.11.0 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3678 Lines: 121 Signed-off-by: Thomas Schoebel-Theuer --- include/linux/brick/brick_checking.h | 107 +++++++++++++++++++++++++++++++++++ 1 file changed, 107 insertions(+) create mode 100644 include/linux/brick/brick_checking.h diff --git a/include/linux/brick/brick_checking.h b/include/linux/brick/brick_checking.h new file mode 100644 index 000000000000..957bd5227db9 --- /dev/null +++ b/include/linux/brick/brick_checking.h @@ -0,0 +1,107 @@ +/* + * MARS Long Distance Replication Software + * + * Copyright (C) 2010-2014 Thomas Schoebel-Theuer + * Copyright (C) 2011-2014 1&1 Internet AG + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef BRICK_CHECKING_H +#define BRICK_CHECKING_H + +/***********************************************************************/ + +/* checking */ + +#if defined(CONFIG_MARS_DEBUG) || defined(CONFIG_MARS_CHECKS) +#define BRICK_CHECKING true +#else +#define BRICK_CHECKING false +#endif + +#define _CHECK_ATOMIC(atom, OP, minval) \ +do { \ + if (BRICK_CHECKING) { \ + int __test = atomic_read(atom); \ + if (unlikely(__test OP(minval))) { \ + atomic_set(atom, minval); \ + BRICK_ERR("%d: atomic " #atom " " #OP " " #minval " (%d)\n", __LINE__, __test);\ + } \ + } \ +} while (0) + +#define CHECK_ATOMIC(atom, minval) \ + _CHECK_ATOMIC(atom, <, minval) + +#define CHECK_HEAD_EMPTY(head) \ +do { \ + if (BRICK_CHECKING && unlikely(!list_empty(head) && (head)->next)) {\ + list_del_init(head); \ + BRICK_ERR("%d: list_head " #head " (%p) not empty\n", __LINE__, head);\ + } \ +} while (0) + +#ifdef CONFIG_MARS_DEBUG_MEM +#define CHECK_PTR_DEAD(ptr, label) \ +do { \ + if (BRICK_CHECKING && unlikely((ptr) == (void *)0x5a5a5a5a5a5a5a5a)) {\ + BRICK_FAT("%d: pointer '" #ptr "' is DEAD\n", __LINE__);\ + goto label; \ + } \ +} while (0) +#else +#define CHECK_PTR_DEAD(ptr, label) /*empty*/ +#endif + +#define CHECK_PTR_NULL(ptr, label) \ +do { \ + CHECK_PTR_DEAD(ptr, label); \ + if (BRICK_CHECKING && unlikely(!(ptr))) { \ + BRICK_FAT("%d: pointer '" #ptr "' is NULL\n", __LINE__);\ + goto label; \ + } \ +} while (0) + +#ifdef CONFIG_MARS_DEBUG +#define CHECK_PTR(ptr, label) \ +do { \ + CHECK_PTR_NULL(ptr, label); \ + if (BRICK_CHECKING && unlikely(!virt_addr_valid(ptr))) { \ + BRICK_FAT("%d: pointer '" #ptr "' (%p) is no valid virtual KERNEL address\n", __LINE__, ptr);\ + goto label; \ + } \ +} while (0) +#else +#define CHECK_PTR(ptr, label) CHECK_PTR_NULL(ptr, label) +#endif + +#define CHECK_ASPECT(a_ptr, o_ptr, label) \ +do { \ + if (BRICK_CHECKING && unlikely((a_ptr)->object != o_ptr)) { \ + BRICK_FAT( \ + "%d: aspect pointer '" #a_ptr "' (%p) belongs to object %p, not to " #o_ptr " (%p)\n", __LINE__, a_ptr, (\ + \ + \ + a_ptr)->object, o_ptr); \ + goto label; \ + } \ +} while (0) + +#define _CHECK(ptr, label) \ +do { \ + if (BRICK_CHECKING && unlikely(!(ptr))) { \ + BRICK_FAT("%d: condition '" #ptr "' is VIOLATED\n", __LINE__);\ + goto label; \ + } \ +} while (0) + +#endif -- 2.11.0