From patchwork Thu Jul 26 05:33:51 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Coly Li X-Patchwork-Id: 10545227 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B95D414E0 for ; Thu, 26 Jul 2018 05:34:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A6F502A7F0 for ; Thu, 26 Jul 2018 05:34:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9B28C2A82F; Thu, 26 Jul 2018 05:34:38 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C5D752A810 for ; Thu, 26 Jul 2018 05:34:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728914AbeGZGtg (ORCPT ); Thu, 26 Jul 2018 02:49:36 -0400 Received: from mx2.suse.de ([195.135.220.15]:43706 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728652AbeGZGtg (ORCPT ); Thu, 26 Jul 2018 02:49:36 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 9D6C7ACEF; Thu, 26 Jul 2018 05:34:27 +0000 (UTC) From: Coly Li To: colyli@suse.de, akpm@linux-foundation.org, linux-kernel@vger.kernel.org Cc: linux-bcache@vger.kernel.org, linux-block@vger.kernel.org, Andy Shevchenko , Greg Kroah-Hartman , Michael Lyle , Kent Overstreet , Linus Torvalds , Thomas Gleixner , Kate Stewart , Eric Biggers , Randy Dunlap Subject: [PATCH v5 1/2] lib: add crc64 calculation routines Date: Thu, 26 Jul 2018 13:33:51 +0800 Message-Id: <20180726053352.2781-2-colyli@suse.de> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180726053352.2781-1-colyli@suse.de> References: <20180726053352.2781-1-colyli@suse.de> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds the re-write crc64 calculation routines for Linux kernel. The CRC64 polynomial arithmetic follows ECMA-182 specification, inspired by CRC paper of Dr. Ross N. Williams (see http://www.ross.net/crc/download/crc_v3.txt) and other public domain implementations. All the changes work in this way, - When Linux kernel is built, host program lib/gen_crc64table.c will be compiled to lib/gen_crc64table and executed. - The output of gen_crc64table execution is an array called as lookup table (a.k.a POLY 0x42f0e1eba9ea369) which contain 256 64-bit long numbers, this talbe is dumped into header file lib/crc64table.h. - Then the header file is included by lib/crc64.c for normal 64bit crc calculation. - Function declaration of the crc64 calculation routines is placed in include/linux/crc64.h Currently bcache is the only user of crc64_be(), another potential user is bcachefs which is on the way to be in mainline kernel. Therefore it makes sense to move crc64 calculation into lib/crc64.c as public code. Signed-off-by: Coly Li Co-developed-by: Andy Shevchenko Signed-off-by: Andy Shevchenko Reviewed-by: Hannes Reinecke Cc: Greg Kroah-Hartman Cc: Andy Shevchenko Cc: Michael Lyle Cc: Kent Overstreet Cc: Linus Torvalds Cc: Thomas Gleixner Cc: Kate Stewart Cc: Eric Biggers Cc: Andrew Morton Cc: Randy Dunlap Signed-off-by: NeilBrown Acked-by: Coly Li --- Changelog: v5: Fixes review comments of v4 v4: Only keep crc64_be() in lib/crc64.c, move rested bcache specific stuffs back to bcache code. Other fixes from the review comments of v3 v3: More fixes for review comments of v2 By review comments from Eric Biggers, current functions naming with 'le' is misleading. Remove 'le' from the crc function names, and use u64 to replace __le64 in parameters and return values. v2: Fix reivew comments of v1 v1: Initial version. include/linux/crc64.h | 11 +++++++ lib/.gitignore | 2 ++ lib/Kconfig | 8 +++++ lib/Makefile | 11 +++++++ lib/crc64.c | 56 +++++++++++++++++++++++++++++++++++ lib/gen_crc64table.c | 68 +++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 156 insertions(+) create mode 100644 include/linux/crc64.h create mode 100644 lib/crc64.c create mode 100644 lib/gen_crc64table.c diff --git a/include/linux/crc64.h b/include/linux/crc64.h new file mode 100644 index 000000000000..1fc9f0710c10 --- /dev/null +++ b/include/linux/crc64.h @@ -0,0 +1,11 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * See lib/crc64.c for the related specification and polynomial arithmetic. + */ +#ifndef _LINUX_CRC64_H +#define _LINUX_CRC64_H + +#include + +u64 __pure crc64_be(u64 crc, const void *p, size_t len); +#endif /* _LINUX_CRC64_H */ diff --git a/lib/.gitignore b/lib/.gitignore index 09aae85418ab..f2a39c9e5485 100644 --- a/lib/.gitignore +++ b/lib/.gitignore @@ -2,5 +2,7 @@ # Generated files # gen_crc32table +gen_crc64table crc32table.h +crc64table.h oid_registry_data.c diff --git a/lib/Kconfig b/lib/Kconfig index 706836ec314d..9c10b9852563 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -170,6 +170,14 @@ config CRC32_BIT endchoice +config CRC64 + tristate "CRC64 functions" + help + This option is provided for the case where no in-kernel-tree + modules require CRC64 functions, but a module built outside + the kernel tree does. Such modules that use library CRC64 + functions require M here. + config CRC4 tristate "CRC4 functions" help diff --git a/lib/Makefile b/lib/Makefile index 90dc5520b784..40c215181687 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -102,6 +102,7 @@ obj-$(CONFIG_CRC16) += crc16.o obj-$(CONFIG_CRC_T10DIF)+= crc-t10dif.o 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 @@ -215,7 +216,9 @@ obj-$(CONFIG_FONT_SUPPORT) += fonts/ obj-$(CONFIG_PRIME_NUMBERS) += prime_numbers.o hostprogs-y := gen_crc32table +hostprogs-y += gen_crc64table clean-files := crc32table.h +clean-files += crc64table.h $(obj)/crc32.o: $(obj)/crc32table.h @@ -225,6 +228,14 @@ quiet_cmd_crc32 = GEN $@ $(obj)/crc32table.h: $(obj)/gen_crc32table $(call cmd,crc32) +$(obj)/crc64.o: $(obj)/crc64table.h + +quiet_cmd_crc64 = GEN $@ + cmd_crc64 = $< > $@ + +$(obj)/crc64table.h: $(obj)/gen_crc64table + $(call cmd,crc64) + # # Build a fast OID lookip registry from include/linux/oid_registry.h # diff --git a/lib/crc64.c b/lib/crc64.c new file mode 100644 index 000000000000..0ef8ae6ac047 --- /dev/null +++ b/lib/crc64.c @@ -0,0 +1,56 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Normal 64-bit CRC calculation. + * + * This is a basic crc64 implementation following ECMA-182 specification, + * which can be found from, + * http://www.ecma-international.org/publications/standards/Ecma-182.htm + * + * Dr. Ross N. Williams has a great document to introduce the idea of CRC + * algorithm, here the CRC64 code is also inspired by the table-driven + * algorithm and detail example from this paper. This paper can be found + * from, + * http://www.ross.net/crc/download/crc_v3.txt + * + * crc64table[256] is the lookup table of a table-driven 64-bit CRC + * calculation, which is generated by gen_crc64table.c in kernel build + * time. The polynomial of crc64 arithmetic is from ECMA-182 specification + * as well, which is defined as, + * + * x^64 + x^62 + x^57 + x^55 + x^54 + x^53 + x^52 + x^47 + x^46 + x^45 + + * x^40 + x^39 + x^38 + x^37 + x^35 + x^33 + x^32 + x^31 + x^29 + x^27 + + * x^24 + x^23 + x^22 + x^21 + x^19 + x^17 + x^13 + x^12 + x^10 + x^9 + + * x^7 + x^4 + x + 1 + * + * Copyright 2018 SUSE Linux. + * Author: Coly Li + */ + +#include +#include +#include "crc64table.h" + +MODULE_DESCRIPTION("CRC64 calculations"); +MODULE_LICENSE("GPL v2"); + +/** + * crc64_be - Calculate bitwise big-endian ECMA-182 CRC64 + * @crc: seed value for computation. 0 or (u64)~0 for a new CRC calculation, + or the previous crc64 value if computing incrementally. + * @p: pointer to buffer over which CRC64 is run + * @len: length of buffer @p + */ +u64 __pure crc64_be(u64 crc, const void *p, size_t len) +{ + size_t i, t; + + const unsigned char *_p = p; + + for (i = 0; i < len; i++) { + t = ((crc >> 56) ^ (*_p++)) & 0xFF; + crc = crc64table[t] ^ (crc << 8); + } + + return crc; +} +EXPORT_SYMBOL_GPL(crc64_be); diff --git a/lib/gen_crc64table.c b/lib/gen_crc64table.c new file mode 100644 index 000000000000..9011926e4162 --- /dev/null +++ b/lib/gen_crc64table.c @@ -0,0 +1,68 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Generate lookup table for the table-driven CRC64 calculation. + * + * gen_crc64table is executed in kernel build time and generates + * lib/crc64table.h. This header is included by lib/crc64.c for + * the table-driven CRC64 calculation. + * + * See lib/crc64.c for more information about which specification + * and polynomial arithmetic that gen_crc64table.c follows to + * generate the lookup table. + * + * Copyright 2018 SUSE Linux. + * Author: Coly Li + */ +#include +#include + +#include + +#define CRC64_ECMA182_POLY 0x42F0E1EBA9EA3693ULL + +static uint64_t crc64_table[256] = {0}; + +static void generate_crc64_table(void) +{ + uint64_t i, j, c, crc; + + for (i = 0; i < 256; i++) { + crc = 0; + c = i << 56; + + for (j = 0; j < 8; j++) { + if ((crc ^ c) & 0x8000000000000000ULL) + crc = (crc << 1) ^ CRC64_ECMA182_POLY; + else + crc <<= 1; + c <<= 1; + } + + crc64_table[i] = crc; + } +} + +static void print_crc64_table(void) +{ + int i; + + printf("/* this file is generated - do not edit */\n\n"); + printf("#include \n"); + printf("#include \n\n"); + printf("static const u64 ____cacheline_aligned crc64table[256] = {\n"); + for (i = 0; i < 256; i++) { + printf("\t0x%016" PRIx64 "ULL", crc64_table[i]); + if (i & 0x1) + printf(",\n"); + else + printf(", "); + } + printf("};\n"); +} + +int main(int argc, char *argv[]) +{ + generate_crc64_table(); + print_crc64_table(); + return 0; +} From patchwork Thu Jul 26 05:33:52 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Coly Li X-Patchwork-Id: 10545229 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 220B514E0 for ; Thu, 26 Jul 2018 05:34:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0F3022A810 for ; Thu, 26 Jul 2018 05:34:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0366D2A829; Thu, 26 Jul 2018 05:34:46 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 59DA12A82F for ; Thu, 26 Jul 2018 05:34:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729001AbeGZGtp (ORCPT ); Thu, 26 Jul 2018 02:49:45 -0400 Received: from mx2.suse.de ([195.135.220.15]:43740 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728652AbeGZGtp (ORCPT ); Thu, 26 Jul 2018 02:49:45 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id A7027AD81; Thu, 26 Jul 2018 05:34:35 +0000 (UTC) From: Coly Li To: colyli@suse.de, akpm@linux-foundation.org, linux-kernel@vger.kernel.org Cc: linux-bcache@vger.kernel.org, linux-block@vger.kernel.org, Michael Lyle , Kent Overstreet , Linus Torvalds , Thomas Gleixner , Kate Stewart , Randy Dunlap Subject: [PATCH v5 2/2] bcache: use routines from lib/crc64.c for CRC64 calculation Date: Thu, 26 Jul 2018 13:33:52 +0800 Message-Id: <20180726053352.2781-3-colyli@suse.de> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180726053352.2781-1-colyli@suse.de> References: <20180726053352.2781-1-colyli@suse.de> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Now we have crc64 calculation in lib/crc64.c, it is unnecessary for bcache to use it own version. This patch changes bcache code to use crc64 routines in lib/crc64.c. Signed-off-by: Coly Li Reviewed-by: Hannes Reinecke Reviewed-by: Andy Shevchenko Cc: Michael Lyle Cc: Kent Overstreet Cc: Linus Torvalds Cc: Thomas Gleixner Cc: Kate Stewart Cc: Andrew Morton Cc: Randy Dunlap --- Changelog: v3: Only call crc64_be() from lib/crc64.c, and implemennt bch_crc64() and bch_crc64_update() based on crc64_be(). v2: Call crc64_le_bch(), crc64_le_update() from lib/crc64.c v1: Initial version drivers/md/bcache/Kconfig | 1 + drivers/md/bcache/util.c | 131 -------------------------------------- drivers/md/bcache/util.h | 21 ++++-- 3 files changed, 18 insertions(+), 135 deletions(-) diff --git a/drivers/md/bcache/Kconfig b/drivers/md/bcache/Kconfig index 17bf109c58e9..af247298409a 100644 --- a/drivers/md/bcache/Kconfig +++ b/drivers/md/bcache/Kconfig @@ -1,6 +1,7 @@ config BCACHE tristate "Block device as cache" + select CRC64 ---help--- Allows a block device to be used as cache for other devices; uses a btree for indexing and the layout is optimized for SSDs. diff --git a/drivers/md/bcache/util.c b/drivers/md/bcache/util.c index fc479b026d6d..f912c372978c 100644 --- a/drivers/md/bcache/util.c +++ b/drivers/md/bcache/util.c @@ -279,134 +279,3 @@ int bch_bio_alloc_pages(struct bio *bio, gfp_t gfp_mask) return 0; } - -/* - * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group (Any - * use permitted, subject to terms of PostgreSQL license; see.) - - * If we have a 64-bit integer type, then a 64-bit CRC looks just like the - * usual sort of implementation. (See Ross Williams' excellent introduction - * A PAINLESS GUIDE TO CRC ERROR DETECTION ALGORITHMS, available from - * ftp://ftp.rocksoft.com/papers/crc_v3.txt or several other net sites.) - * If we have no working 64-bit type, then fake it with two 32-bit registers. - * - * The present implementation is a normal (not "reflected", in Williams' - * terms) 64-bit CRC, using initial all-ones register contents and a final - * bit inversion. The chosen polynomial is borrowed from the DLT1 spec - * (ECMA-182, available from http://www.ecma.ch/ecma1/STAND/ECMA-182.HTM): - * - * x^64 + x^62 + x^57 + x^55 + x^54 + x^53 + x^52 + x^47 + x^46 + x^45 + - * x^40 + x^39 + x^38 + x^37 + x^35 + x^33 + x^32 + x^31 + x^29 + x^27 + - * x^24 + x^23 + x^22 + x^21 + x^19 + x^17 + x^13 + x^12 + x^10 + x^9 + - * x^7 + x^4 + x + 1 -*/ - -static const uint64_t crc_table[256] = { - 0x0000000000000000ULL, 0x42F0E1EBA9EA3693ULL, 0x85E1C3D753D46D26ULL, - 0xC711223CFA3E5BB5ULL, 0x493366450E42ECDFULL, 0x0BC387AEA7A8DA4CULL, - 0xCCD2A5925D9681F9ULL, 0x8E224479F47CB76AULL, 0x9266CC8A1C85D9BEULL, - 0xD0962D61B56FEF2DULL, 0x17870F5D4F51B498ULL, 0x5577EEB6E6BB820BULL, - 0xDB55AACF12C73561ULL, 0x99A54B24BB2D03F2ULL, 0x5EB4691841135847ULL, - 0x1C4488F3E8F96ED4ULL, 0x663D78FF90E185EFULL, 0x24CD9914390BB37CULL, - 0xE3DCBB28C335E8C9ULL, 0xA12C5AC36ADFDE5AULL, 0x2F0E1EBA9EA36930ULL, - 0x6DFEFF5137495FA3ULL, 0xAAEFDD6DCD770416ULL, 0xE81F3C86649D3285ULL, - 0xF45BB4758C645C51ULL, 0xB6AB559E258E6AC2ULL, 0x71BA77A2DFB03177ULL, - 0x334A9649765A07E4ULL, 0xBD68D2308226B08EULL, 0xFF9833DB2BCC861DULL, - 0x388911E7D1F2DDA8ULL, 0x7A79F00C7818EB3BULL, 0xCC7AF1FF21C30BDEULL, - 0x8E8A101488293D4DULL, 0x499B3228721766F8ULL, 0x0B6BD3C3DBFD506BULL, - 0x854997BA2F81E701ULL, 0xC7B97651866BD192ULL, 0x00A8546D7C558A27ULL, - 0x4258B586D5BFBCB4ULL, 0x5E1C3D753D46D260ULL, 0x1CECDC9E94ACE4F3ULL, - 0xDBFDFEA26E92BF46ULL, 0x990D1F49C77889D5ULL, 0x172F5B3033043EBFULL, - 0x55DFBADB9AEE082CULL, 0x92CE98E760D05399ULL, 0xD03E790CC93A650AULL, - 0xAA478900B1228E31ULL, 0xE8B768EB18C8B8A2ULL, 0x2FA64AD7E2F6E317ULL, - 0x6D56AB3C4B1CD584ULL, 0xE374EF45BF6062EEULL, 0xA1840EAE168A547DULL, - 0x66952C92ECB40FC8ULL, 0x2465CD79455E395BULL, 0x3821458AADA7578FULL, - 0x7AD1A461044D611CULL, 0xBDC0865DFE733AA9ULL, 0xFF3067B657990C3AULL, - 0x711223CFA3E5BB50ULL, 0x33E2C2240A0F8DC3ULL, 0xF4F3E018F031D676ULL, - 0xB60301F359DBE0E5ULL, 0xDA050215EA6C212FULL, 0x98F5E3FE438617BCULL, - 0x5FE4C1C2B9B84C09ULL, 0x1D14202910527A9AULL, 0x93366450E42ECDF0ULL, - 0xD1C685BB4DC4FB63ULL, 0x16D7A787B7FAA0D6ULL, 0x5427466C1E109645ULL, - 0x4863CE9FF6E9F891ULL, 0x0A932F745F03CE02ULL, 0xCD820D48A53D95B7ULL, - 0x8F72ECA30CD7A324ULL, 0x0150A8DAF8AB144EULL, 0x43A04931514122DDULL, - 0x84B16B0DAB7F7968ULL, 0xC6418AE602954FFBULL, 0xBC387AEA7A8DA4C0ULL, - 0xFEC89B01D3679253ULL, 0x39D9B93D2959C9E6ULL, 0x7B2958D680B3FF75ULL, - 0xF50B1CAF74CF481FULL, 0xB7FBFD44DD257E8CULL, 0x70EADF78271B2539ULL, - 0x321A3E938EF113AAULL, 0x2E5EB66066087D7EULL, 0x6CAE578BCFE24BEDULL, - 0xABBF75B735DC1058ULL, 0xE94F945C9C3626CBULL, 0x676DD025684A91A1ULL, - 0x259D31CEC1A0A732ULL, 0xE28C13F23B9EFC87ULL, 0xA07CF2199274CA14ULL, - 0x167FF3EACBAF2AF1ULL, 0x548F120162451C62ULL, 0x939E303D987B47D7ULL, - 0xD16ED1D631917144ULL, 0x5F4C95AFC5EDC62EULL, 0x1DBC74446C07F0BDULL, - 0xDAAD56789639AB08ULL, 0x985DB7933FD39D9BULL, 0x84193F60D72AF34FULL, - 0xC6E9DE8B7EC0C5DCULL, 0x01F8FCB784FE9E69ULL, 0x43081D5C2D14A8FAULL, - 0xCD2A5925D9681F90ULL, 0x8FDAB8CE70822903ULL, 0x48CB9AF28ABC72B6ULL, - 0x0A3B7B1923564425ULL, 0x70428B155B4EAF1EULL, 0x32B26AFEF2A4998DULL, - 0xF5A348C2089AC238ULL, 0xB753A929A170F4ABULL, 0x3971ED50550C43C1ULL, - 0x7B810CBBFCE67552ULL, 0xBC902E8706D82EE7ULL, 0xFE60CF6CAF321874ULL, - 0xE224479F47CB76A0ULL, 0xA0D4A674EE214033ULL, 0x67C58448141F1B86ULL, - 0x253565A3BDF52D15ULL, 0xAB1721DA49899A7FULL, 0xE9E7C031E063ACECULL, - 0x2EF6E20D1A5DF759ULL, 0x6C0603E6B3B7C1CAULL, 0xF6FAE5C07D3274CDULL, - 0xB40A042BD4D8425EULL, 0x731B26172EE619EBULL, 0x31EBC7FC870C2F78ULL, - 0xBFC9838573709812ULL, 0xFD39626EDA9AAE81ULL, 0x3A28405220A4F534ULL, - 0x78D8A1B9894EC3A7ULL, 0x649C294A61B7AD73ULL, 0x266CC8A1C85D9BE0ULL, - 0xE17DEA9D3263C055ULL, 0xA38D0B769B89F6C6ULL, 0x2DAF4F0F6FF541ACULL, - 0x6F5FAEE4C61F773FULL, 0xA84E8CD83C212C8AULL, 0xEABE6D3395CB1A19ULL, - 0x90C79D3FEDD3F122ULL, 0xD2377CD44439C7B1ULL, 0x15265EE8BE079C04ULL, - 0x57D6BF0317EDAA97ULL, 0xD9F4FB7AE3911DFDULL, 0x9B041A914A7B2B6EULL, - 0x5C1538ADB04570DBULL, 0x1EE5D94619AF4648ULL, 0x02A151B5F156289CULL, - 0x4051B05E58BC1E0FULL, 0x87409262A28245BAULL, 0xC5B073890B687329ULL, - 0x4B9237F0FF14C443ULL, 0x0962D61B56FEF2D0ULL, 0xCE73F427ACC0A965ULL, - 0x8C8315CC052A9FF6ULL, 0x3A80143F5CF17F13ULL, 0x7870F5D4F51B4980ULL, - 0xBF61D7E80F251235ULL, 0xFD913603A6CF24A6ULL, 0x73B3727A52B393CCULL, - 0x31439391FB59A55FULL, 0xF652B1AD0167FEEAULL, 0xB4A25046A88DC879ULL, - 0xA8E6D8B54074A6ADULL, 0xEA16395EE99E903EULL, 0x2D071B6213A0CB8BULL, - 0x6FF7FA89BA4AFD18ULL, 0xE1D5BEF04E364A72ULL, 0xA3255F1BE7DC7CE1ULL, - 0x64347D271DE22754ULL, 0x26C49CCCB40811C7ULL, 0x5CBD6CC0CC10FAFCULL, - 0x1E4D8D2B65FACC6FULL, 0xD95CAF179FC497DAULL, 0x9BAC4EFC362EA149ULL, - 0x158E0A85C2521623ULL, 0x577EEB6E6BB820B0ULL, 0x906FC95291867B05ULL, - 0xD29F28B9386C4D96ULL, 0xCEDBA04AD0952342ULL, 0x8C2B41A1797F15D1ULL, - 0x4B3A639D83414E64ULL, 0x09CA82762AAB78F7ULL, 0x87E8C60FDED7CF9DULL, - 0xC51827E4773DF90EULL, 0x020905D88D03A2BBULL, 0x40F9E43324E99428ULL, - 0x2CFFE7D5975E55E2ULL, 0x6E0F063E3EB46371ULL, 0xA91E2402C48A38C4ULL, - 0xEBEEC5E96D600E57ULL, 0x65CC8190991CB93DULL, 0x273C607B30F68FAEULL, - 0xE02D4247CAC8D41BULL, 0xA2DDA3AC6322E288ULL, 0xBE992B5F8BDB8C5CULL, - 0xFC69CAB42231BACFULL, 0x3B78E888D80FE17AULL, 0x7988096371E5D7E9ULL, - 0xF7AA4D1A85996083ULL, 0xB55AACF12C735610ULL, 0x724B8ECDD64D0DA5ULL, - 0x30BB6F267FA73B36ULL, 0x4AC29F2A07BFD00DULL, 0x08327EC1AE55E69EULL, - 0xCF235CFD546BBD2BULL, 0x8DD3BD16FD818BB8ULL, 0x03F1F96F09FD3CD2ULL, - 0x41011884A0170A41ULL, 0x86103AB85A2951F4ULL, 0xC4E0DB53F3C36767ULL, - 0xD8A453A01B3A09B3ULL, 0x9A54B24BB2D03F20ULL, 0x5D45907748EE6495ULL, - 0x1FB5719CE1045206ULL, 0x919735E51578E56CULL, 0xD367D40EBC92D3FFULL, - 0x1476F63246AC884AULL, 0x568617D9EF46BED9ULL, 0xE085162AB69D5E3CULL, - 0xA275F7C11F7768AFULL, 0x6564D5FDE549331AULL, 0x279434164CA30589ULL, - 0xA9B6706FB8DFB2E3ULL, 0xEB46918411358470ULL, 0x2C57B3B8EB0BDFC5ULL, - 0x6EA7525342E1E956ULL, 0x72E3DAA0AA188782ULL, 0x30133B4B03F2B111ULL, - 0xF7021977F9CCEAA4ULL, 0xB5F2F89C5026DC37ULL, 0x3BD0BCE5A45A6B5DULL, - 0x79205D0E0DB05DCEULL, 0xBE317F32F78E067BULL, 0xFCC19ED95E6430E8ULL, - 0x86B86ED5267CDBD3ULL, 0xC4488F3E8F96ED40ULL, 0x0359AD0275A8B6F5ULL, - 0x41A94CE9DC428066ULL, 0xCF8B0890283E370CULL, 0x8D7BE97B81D4019FULL, - 0x4A6ACB477BEA5A2AULL, 0x089A2AACD2006CB9ULL, 0x14DEA25F3AF9026DULL, - 0x562E43B4931334FEULL, 0x913F6188692D6F4BULL, 0xD3CF8063C0C759D8ULL, - 0x5DEDC41A34BBEEB2ULL, 0x1F1D25F19D51D821ULL, 0xD80C07CD676F8394ULL, - 0x9AFCE626CE85B507ULL, -}; - -uint64_t bch_crc64_update(uint64_t crc, const void *_data, size_t len) -{ - const unsigned char *data = _data; - - while (len--) { - int i = ((int) (crc >> 56) ^ *data++) & 0xFF; - crc = crc_table[i] ^ (crc << 8); - } - - return crc; -} - -uint64_t bch_crc64(const void *data, size_t len) -{ - uint64_t crc = 0xffffffffffffffffULL; - - crc = bch_crc64_update(crc, data, len); - - return crc ^ 0xffffffffffffffffULL; -} diff --git a/drivers/md/bcache/util.h b/drivers/md/bcache/util.h index cced87f8eb27..a1579e28049f 100644 --- a/drivers/md/bcache/util.h +++ b/drivers/md/bcache/util.h @@ -11,6 +11,7 @@ #include #include #include +#include #include "closure.h" @@ -542,6 +543,22 @@ dup: \ #define RB_PREV(ptr, member) \ container_of_or_null(rb_prev(&(ptr)->member), typeof(*ptr), member) +static inline uint64_t bch_crc64(const void *p, size_t len) +{ + uint64_t crc = 0xffffffffffffffffULL; + + crc = crc64_be(crc, p, len); + return crc ^ 0xffffffffffffffffULL; +} + +static inline uint64_t bch_crc64_update(uint64_t crc, + const void *p, + size_t len) +{ + crc = crc64_be(crc, p, len); + return crc; +} + /* Does linear interpolation between powers of two */ static inline unsigned fract_exp_two(unsigned x, unsigned fract_bits) { @@ -561,8 +578,4 @@ static inline sector_t bdev_sectors(struct block_device *bdev) { return bdev->bd_inode->i_size >> 9; } - -uint64_t bch_crc64_update(uint64_t, const void *, size_t); -uint64_t bch_crc64(const void *, size_t); - #endif /* _BCACHE_UTIL_H */