From patchwork Mon Oct 21 00:29:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Biggers X-Patchwork-Id: 13843362 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 AAB6112EBE1; Mon, 21 Oct 2024 00:29:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729470597; cv=none; b=pNhQYmD4eKzw2IH741pnt0YEg6ERkMuvHbk/9xtBVCrw37U0eiUo0Dx0tTB+UQQFzGsm15MuDILNnTsLLYlOXqFtJ3pp/yLtLOuA3OgcWbCII6ttmidLOump6Z39B7QVjGQC16Z0K9aySg3r46anPjIjCUYGG1L38uePAFbpVk8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729470597; c=relaxed/simple; bh=4c2g2/aBZcJU5enMBJmjzSkc9cpjlgUBMmCuy/77kP8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=s1kdcCx/n6xSubixXX9incZqO98dB11IZtpF6JpzfHsI0AYGA/PMhWrKrymcn8UVJISGJJH9EOrt9vZf2V6WC7npKQgCOK7OOToGQvXTAz3TBbUJA082FtzzieS6HK+xEDhIrj1vA5xbM8AhXhZISrbDwYbDfX78FH1gcuOocAo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=m8OKhyqD; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="m8OKhyqD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E4B69C4CEE5; Mon, 21 Oct 2024 00:29:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729470597; bh=4c2g2/aBZcJU5enMBJmjzSkc9cpjlgUBMmCuy/77kP8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=m8OKhyqDcGs17zHcb6Jt5UVhwFuor56sLp5dULk3zv8sIxETjWHOz+V/XWOF//bH6 jGmc4mj20oXisgOVLQ1YneJQIhD74LNkVdnk9C1bZi/p3GKS2CnpWzPX+j7BUymCpt lYDXsl14clCrOdfkOE1F0ZUPjvPqycmkUWRtfVUAjkwCgMkr63QrYMYxdHEJrgvjbR iFCKhpv1BK1ZZkmKPADL9f/DIlqTHNAyCQ2TH+nVQed+4vEYhvkER5MuWXnFpVTzwJ ztD1BC6CsgZqsYd7mA5RbvuXJDPo701tTn82k2meXAAacdHBASCiusVzqTuYmbIs5d ot9NliUxFaahw== From: Eric Biggers To: linux-kernel@vger.kernel.org Cc: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mips@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, sparclinux@vger.kernel.org, x86@kernel.org Subject: [PATCH 12/15] lib/crc32: make crc32c() go directly to lib Date: Sun, 20 Oct 2024 17:29:32 -0700 Message-ID: <20241021002935.325878-13-ebiggers@kernel.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241021002935.325878-1-ebiggers@kernel.org> References: <20241021002935.325878-1-ebiggers@kernel.org> Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Eric Biggers Now that the lower level __crc32c_le() library function is optimized for each architecture, make crc32c() just call that instead of taking an inefficient and error-prone detour through the shash API. Note: a future cleanup should make crc32c_le() be the actual library function instead of __crc32c_le(). That will require updating callers of __crc32c_le() to use crc32c_le() instead, and updating callers of crc32c_le() that expect a 'const void *' arg to expect 'const u8 *' instead. Similarly, a future cleanup should remove LIBCRC32C by making everyone who is selecting it just select CRC32 directly instead. Signed-off-by: Eric Biggers --- include/linux/crc32c.h | 7 ++-- lib/Kconfig | 10 ++---- lib/Makefile | 1 - lib/libcrc32c.c | 74 ------------------------------------------ 4 files changed, 8 insertions(+), 84 deletions(-) delete mode 100644 lib/libcrc32c.c diff --git a/include/linux/crc32c.h b/include/linux/crc32c.h index 357ae4611a453..47eb78003c265 100644 --- a/include/linux/crc32c.h +++ b/include/linux/crc32c.h @@ -1,12 +1,15 @@ /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_CRC32C_H #define _LINUX_CRC32C_H -#include +#include -extern u32 crc32c(u32 crc, const void *address, unsigned int length); +static inline u32 crc32c(u32 crc, const void *address, unsigned int length) +{ + return __crc32c_le(crc, address, length); +} /* This macro exists for backwards-compatibility. */ #define crc32c_le crc32c #endif /* _LINUX_CRC32C_H */ diff --git a/lib/Kconfig b/lib/Kconfig index 07afcf214f353..b894ee64ff957 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -296,18 +296,14 @@ config CRC7 the kernel tree does. Such modules that use library CRC7 functions require M here. config LIBCRC32C tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" - select CRYPTO - select CRYPTO_CRC32C + select CRC32 help - This option is provided for the case where no in-kernel-tree - modules require CRC32c functions, but a module built outside the - kernel tree does. Such modules that use library CRC32c functions - require M here. See Castagnoli93. - Module will be libcrc32c. + This option just selects CRC32 and is provided for compatibility + purposes until the users are updated to select CRC32 directly. config CRC8 tristate "CRC8 function" help This option provides CRC8 function. Drivers may select this diff --git a/lib/Makefile b/lib/Makefile index 773adf88af416..15646679aee21 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -161,11 +161,10 @@ obj-$(CONFIG_CRC_ITU_T) += crc-itu-t.o obj-$(CONFIG_CRC32) += crc32.o obj-$(CONFIG_CRC64) += crc64.o obj-$(CONFIG_CRC32_SELFTEST) += crc32test.o obj-$(CONFIG_CRC4) += crc4.o obj-$(CONFIG_CRC7) += crc7.o -obj-$(CONFIG_LIBCRC32C) += libcrc32c.o obj-$(CONFIG_CRC8) += crc8.o obj-$(CONFIG_CRC64_ROCKSOFT) += crc64-rocksoft.o obj-$(CONFIG_XXHASH) += xxhash.o obj-$(CONFIG_GENERIC_ALLOCATOR) += genalloc.o diff --git a/lib/libcrc32c.c b/lib/libcrc32c.c deleted file mode 100644 index 649e687413a0c..0000000000000 --- a/lib/libcrc32c.c +++ /dev/null @@ -1,74 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * CRC32C - *@Article{castagnoli-crc, - * author = { Guy Castagnoli and Stefan Braeuer and Martin Herrman}, - * title = {{Optimization of Cyclic Redundancy-Check Codes with 24 - * and 32 Parity Bits}}, - * journal = IEEE Transactions on Communication, - * year = {1993}, - * volume = {41}, - * number = {6}, - * pages = {}, - * month = {June}, - *} - * Used by the iSCSI driver, possibly others, and derived from - * the iscsi-crc.c module of the linux-iscsi driver at - * http://linux-iscsi.sourceforge.net. - * - * Following the example of lib/crc32, this function is intended to be - * flexible and useful for all users. Modules that currently have their - * own crc32c, but hopefully may be able to use this one are: - * net/sctp (please add all your doco to here if you change to - * use this one!) - * - * - * Copyright (c) 2004 Cisco Systems, Inc. - */ - -#include -#include -#include -#include -#include -#include - -static struct crypto_shash *tfm; - -u32 crc32c(u32 crc, const void *address, unsigned int length) -{ - SHASH_DESC_ON_STACK(shash, tfm); - u32 ret, *ctx = (u32 *)shash_desc_ctx(shash); - int err; - - shash->tfm = tfm; - *ctx = crc; - - err = crypto_shash_update(shash, address, length); - BUG_ON(err); - - ret = *ctx; - barrier_data(ctx); - return ret; -} - -EXPORT_SYMBOL(crc32c); - -static int __init libcrc32c_mod_init(void) -{ - tfm = crypto_alloc_shash("crc32c", 0, 0); - return PTR_ERR_OR_ZERO(tfm); -} - -static void __exit libcrc32c_mod_fini(void) -{ - crypto_free_shash(tfm); -} - -module_init(libcrc32c_mod_init); -module_exit(libcrc32c_mod_fini); - -MODULE_AUTHOR("Clay Haapala "); -MODULE_DESCRIPTION("CRC32c (Castagnoli) calculations"); -MODULE_LICENSE("GPL"); -MODULE_SOFTDEP("pre: crc32c");