From nobody Thu Feb 12 22:04:25 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 6F87913E40C 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=1717734416; cv=none; b=f8NWtpaPgPVfGArfs+u582rCHSzPDYhKRuIlQG8W2EJY4jqvjqrvvAxrAe7o0Z4qKwH1o+bkyUYh9iK5rxLoYIQciunKcjfXJT95rmahR8LD9IQA3U0zBacc8PEbXKtS06WAGvRE4nITKnHv3fxMb18GVLKh7quST8B6kmHq9VQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717734416; c=relaxed/simple; bh=iLPdc6e3+GxI2wHjO3ieu8gaZnEFNqjX6eO5XMTguOs=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=iA35Gmn0VptjW0SIpI/EmmJOSGEU+Jhi4Lm0OsqcEnReUfR+dr21wT3nBnnmHIbCCjNZb/XsO4iZBy8ngOZCl2hhjeK5R4mO+m2DmoMVPsUKmSlL99xIDU2IGCGlXfhM0nAvwh38854EUCgu4W9glkV7S4eF5zx2VwM8AG9itwU= 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 4VwShl5WxzzmYRx; 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 978D51400D5; 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 022/110] ubifs-utils: Add linux kernel memory allocation implementations Date: Fri, 7 Jun 2024 12:24:47 +0800 Message-ID: <20240607042615.2069840-23-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 memory allocation implementations, because there are many memory allocations(eg. kmalloc, kzalloc) 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 | 2 ++ ubifs-utils/common/kmem.c | 64 +++++++++++++++++++++++++++++++++++++++++++= ++++ ubifs-utils/common/kmem.h | 56 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 122 insertions(+) create mode 100644 ubifs-utils/common/kmem.c create mode 100644 ubifs-utils/common/kmem.h diff --git a/ubifs-utils/Makemodule.am b/ubifs-utils/Makemodule.am index 69192ffd..13171b74 100644 --- a/ubifs-utils/Makemodule.am +++ b/ubifs-utils/Makemodule.am @@ -2,6 +2,8 @@ common_SOURCES =3D \ ubifs-utils/common/compiler_attributes.h \ ubifs-utils/common/linux_types.h \ ubifs-utils/common/linux_err.h \ + ubifs-utils/common/kmem.h \ + ubifs-utils/common/kmem.c \ ubifs-utils/common/defs.h \ ubifs-utils/common/crc16.h \ ubifs-utils/common/crc16.c \ diff --git a/ubifs-utils/common/kmem.c b/ubifs-utils/common/kmem.c new file mode 100644 index 00000000..e926a137 --- /dev/null +++ b/ubifs-utils/common/kmem.c @@ -0,0 +1,64 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Simple memory interface + */ + +#include "compiler_attributes.h" +#include "linux_types.h" +#include "kmem.h" +#include "defs.h" + +static void *kmem_alloc(size_t size) +{ + void *ptr =3D malloc(size); + + if (ptr =3D=3D NULL) + sys_errmsg("malloc failed (%d bytes)", (int)size); + return ptr; +} + +static void *kmem_zalloc(size_t size) +{ + void *ptr =3D kmem_alloc(size); + + if (!ptr) + return ptr; + + memset(ptr, 0, size); + return ptr; +} + +void *kmalloc(size_t size, gfp_t flags) +{ + if (flags & __GFP_ZERO) + return kmem_zalloc(size); + return kmem_alloc(size); +} + +void *krealloc(void *ptr, size_t new_size, __unused gfp_t flags) +{ + ptr =3D realloc(ptr, new_size); + if (ptr =3D=3D NULL) + sys_errmsg("realloc failed (%d bytes)", (int)new_size); + return ptr; +} + +void *kmalloc_array(size_t n, size_t size, gfp_t flags) +{ + size_t bytes; + + if (unlikely(check_mul_overflow(n, size, &bytes))) + return NULL; + return kmalloc(bytes, flags); +} + +void *kmemdup(const void *src, size_t len, gfp_t gfp) +{ + void *p; + + p =3D kmalloc(len, gfp); + if (p) + memcpy(p, src, len); + + return p; +} diff --git a/ubifs-utils/common/kmem.h b/ubifs-utils/common/kmem.h new file mode 100644 index 00000000..9fe2a364 --- /dev/null +++ b/ubifs-utils/common/kmem.h @@ -0,0 +1,56 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2008 Silicon Graphics, Inc. + * All Rights Reserved. + */ +#ifndef __KMEM_H__ +#define __KMEM_H__ + +#include + +typedef unsigned int gfp_t; + +#define GFP_KERNEL 0 +#define GFP_NOFS 0 +#define __GFP_NOWARN 0 +#define __GFP_ZERO 1 + +#define vmalloc(size) malloc(size) +#define vfree(ptr) free(ptr) + +extern void *kmalloc(size_t, gfp_t); +extern void *krealloc(void *, size_t, __attribute__((unused)) gfp_t); +extern void *kmalloc_array(size_t, size_t, gfp_t); +extern void *kmemdup(const void *src, size_t len, gfp_t gfp); + +static inline void kfree(const void *ptr) +{ + free((void *)ptr); +} + +static inline void kvfree(const void *ptr) +{ + kfree(ptr); +} + +static inline void *kvmalloc(size_t size, gfp_t flags) +{ + return kmalloc(size, flags); +} + +static inline void *kzalloc(size_t size, gfp_t flags) +{ + return kmalloc(size, flags | __GFP_ZERO); +} + +static inline void *__vmalloc(unsigned long size, gfp_t gfp_mask) +{ + return kmalloc(size, gfp_mask); +} + +static inline void *kcalloc(size_t n, size_t size, gfp_t flags) +{ + return kmalloc_array(n, size, flags | __GFP_ZERO); +} + +#endif --=20 2.13.6