From nobody Thu Feb 12 22:03:10 2026 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5E25213E404 for ; Fri, 7 Jun 2024 04:26:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.188 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717734415; cv=none; b=liu0f7ll+cPohqMbkV4wz1v0l+Z7tjO958/Ga9MYJxOQne1nTKjpFgyItmAlVDYk3PF0Ci+aLVHqv8AYRurJba7REvDFEMEN9eNfYEWnliJLhn7pamtVMcSpZn1dqr/slIxZRotBMFffDgWYd3uxOO08ShK8Rt8VH667/p7EkDU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717734415; c=relaxed/simple; bh=OKmuBF0VbvlKz+oYSAG7fYgQrHIxc5bI02YSPW78JB4=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=ViFZaZiCs/RzE0RPTJ/NmIEFLanfjK1HxhGV2WySIZyTeYu2ysxREqXjbfxG6JD325ehZEl+nftS/MxesScnJBQbqIV+S4eWSDO4spWsNw2AsVyrc2ViI6VOkoxukRZgRe5UGyfuYAooSFCy/6MQKNjiWwAIfFeuiAHpfwNZKIY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.188 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.194]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4VwShl51G9zmYS9; Fri, 7 Jun 2024 12:22:15 +0800 (CST) Received: from kwepemm600013.china.huawei.com (unknown [7.193.23.68]) by mail.maildlp.com (Postfix) with ESMTPS id 898A31404F0; Fri, 7 Jun 2024 12:26:51 +0800 (CST) Received: from huawei.com (10.175.104.67) by kwepemm600013.china.huawei.com (7.193.23.68) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Fri, 7 Jun 2024 12:26:42 +0800 From: Zhihao Cheng To: , , , , , CC: , Subject: [RFC PATCH mtd-utils 021/110] ubifs-utils: Add linux kernel error conversion definitions Date: Fri, 7 Jun 2024 12:24:46 +0800 Message-ID: <20240607042615.2069840-22-chengzhihao1@huawei.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240607042615.2069840-1-chengzhihao1@huawei.com> References: <20240607042615.2069840-1-chengzhihao1@huawei.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To kwepemm600013.china.huawei.com (7.193.23.68) Content-Type: text/plain; charset="utf-8" Add linux kernel error conversion definitions, because there are many error type conversions(eg. PTR_ERR, ERR_PTR) used in UBIFS linux kernel libs. This is a preparation for replacing implementation of UBIFS utils with linux kernel libs. Signed-off-by: Zhihao Cheng --- ubifs-utils/Makemodule.am | 1 + ubifs-utils/common/linux_err.h | 62 ++++++++++++++++++++++++++++++++++++++= ++++ 2 files changed, 63 insertions(+) create mode 100644 ubifs-utils/common/linux_err.h diff --git a/ubifs-utils/Makemodule.am b/ubifs-utils/Makemodule.am index 0f9c0fa6..69192ffd 100644 --- a/ubifs-utils/Makemodule.am +++ b/ubifs-utils/Makemodule.am @@ -1,6 +1,7 @@ common_SOURCES =3D \ ubifs-utils/common/compiler_attributes.h \ ubifs-utils/common/linux_types.h \ + ubifs-utils/common/linux_err.h \ ubifs-utils/common/defs.h \ ubifs-utils/common/crc16.h \ ubifs-utils/common/crc16.c \ diff --git a/ubifs-utils/common/linux_err.h b/ubifs-utils/common/linux_err.h new file mode 100644 index 00000000..5c6ddc3f --- /dev/null +++ b/ubifs-utils/common/linux_err.h @@ -0,0 +1,62 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_ERR_H +#define _LINUX_ERR_H + +/* Adapted from include/linux/err.h */ + +#include + +/* + * Kernel pointers have redundant information, so we can use a + * scheme where we can return either an error code or a normal + * pointer with the same return value. + * + * This should be a per-architecture thing, to allow different + * error and pointer decisions. + */ +#define MAX_ERRNO 4095 + +#define IS_ERR_VALUE(x) ((unsigned long)(void *)(x) >=3D (unsigned long)-M= AX_ERRNO) + +static inline void * ERR_PTR(long error) +{ + return (void *) error; +} + +static inline long PTR_ERR(const void *ptr) +{ + return (long) ptr; +} + +static inline bool IS_ERR(const void *ptr) +{ + return IS_ERR_VALUE((unsigned long)ptr); +} + +static inline bool IS_ERR_OR_NULL(const void *ptr) +{ + return !ptr || IS_ERR_VALUE((unsigned long)ptr); +} + +/** + * ERR_CAST - Explicitly cast an error-valued pointer to another pointer t= ype + * @ptr: The pointer to cast. + * + * Explicitly cast an error-valued pointer to another pointer type in such= a + * way as to make it clear that's what's going on. + */ +static inline void * ERR_CAST(const void *ptr) +{ + /* cast away the const */ + return (void *) ptr; +} + +static inline int PTR_ERR_OR_ZERO(const void *ptr) +{ + if (IS_ERR(ptr)) + return PTR_ERR(ptr); + else + return 0; +} + +#endif /* _LINUX_ERR_H */ --=20 2.13.6