From patchwork Fri Dec 3 11:09:44 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: ronnie sahlberg X-Patchwork-Id: 74110 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [199.232.76.165]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 6717CB6F1E for ; Fri, 3 Dec 2010 22:17:00 +1100 (EST) Received: from localhost ([127.0.0.1]:41832 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1POTdI-000369-En for incoming@patchwork.ozlabs.org; Fri, 03 Dec 2010 06:16:56 -0500 Received: from [140.186.70.92] (port=58805 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1POTXj-0001SA-4K for qemu-devel@nongnu.org; Fri, 03 Dec 2010 06:11:12 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1POTXh-0002de-Cx for qemu-devel@nongnu.org; Fri, 03 Dec 2010 06:11:10 -0500 Received: from mail-gx0-f173.google.com ([209.85.161.173]:63740) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1POTXh-0002dL-4d for qemu-devel@nongnu.org; Fri, 03 Dec 2010 06:11:09 -0500 Received: by gxk24 with SMTP id 24so5076526gxk.4 for ; Fri, 03 Dec 2010 03:11:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:received:from:to:cc:subject :date:message-id:x-mailer:in-reply-to:references; bh=1CpEzdUzXtEETsyw9gbHAtbeInaTePood+Ohyrbt5F4=; b=cTWD8aTE8tz0/04Losjig37OEZQCmBnNumoZADKcF4jpzqepd0f5D+U6DtWNFx66FL MHLdaAiCsmk+g8kwkM9ewcbUdzOlZ0ZHVRPSMlu/1FyjwjjY4xQc84uLiOPbsTfQTSea xEQAgsbA7/qMjdWJbr5FWgncpOwXqMCYmZ1LE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; b=AiH2eq0A1Fgz5gR+Z/gdICem+P7Vl2cTRU/Lfg27nPoCa4KHdcAQizR+Glvm6VYpqy Y6jvzF1wQrcvL+iWOCJLTn5tsScT2+2PhDlre2+mFAsrUlY2kvrk0r55UG7OmBq7wO7n vc9dpKpEuIUiaFWSwXIKPNUeC1IN5UN9iDsjQ= Received: by 10.42.226.130 with SMTP id iw2mr414311icb.439.1291374667023; Fri, 03 Dec 2010 03:11:07 -0800 (PST) Received: from ronniesahlberg@gmail.com (CPE-121-216-183-74.lnse2.ken.bigpond.net.au [121.216.183.74]) by mx.google.com with ESMTPS id z4sm1487437ibg.1.2010.12.03.03.11.04 (version=TLSv1/SSLv3 cipher=RC4-MD5); Fri, 03 Dec 2010 03:11:06 -0800 (PST) Received: by ronniesahlberg@gmail.com (sSMTP sendmail emulation); Fri, 03 Dec 2010 22:10:39 +1100 From: ronniesahlberg@gmail.com To: qemu-devel@nongnu.org Date: Fri, 3 Dec 2010 22:09:44 +1100 Message-Id: <1291374593-17448-6-git-send-email-ronniesahlberg@gmail.com> X-Mailer: git-send-email 1.7.3.1 In-Reply-To: <1291374593-17448-1-git-send-email-ronniesahlberg@gmail.com> References: <1291374593-17448-1-git-send-email-ronniesahlberg@gmail.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) Cc: Ronnie Sahlberg Subject: [Qemu-devel] [PATCH 05/14] ./block/iscsi/crc32c.c X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Ronnie Sahlberg iscsi client library : crc32c.c This file contains functions for computing the crc32c used by iscsi header digest and icsi data digest to ensure data integrity across the transport. ... ./block/iscsi/ contains a copy of a general purpose iscsi client library which is aimed at providing a clientside api for iscsi for both qemu/kvm as well as otther scsi related utilities. As such, there is need to make merging across various consumers, qemu/kvm being one of many here, as easy as possible when features are added to the library. As such, no consumer/qemu specific code is used in this library as well as coding guidelined might not be adhered to 100% It is the intention that this library will be useful for many and that iscsi use spawned from this will flourish. Signed-off-by: Ronnie Sahlberg --- block/iscsi/crc32c.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 99 insertions(+), 0 deletions(-) create mode 100644 block/iscsi/crc32c.c diff --git a/block/iscsi/crc32c.c b/block/iscsi/crc32c.c new file mode 100644 index 0000000..3621e30 --- /dev/null +++ b/block/iscsi/crc32c.c @@ -0,0 +1,99 @@ +#include "iscsi.h" +#include "iscsi-private.h" + +/*****************************************************************/ +/* */ +/* CRC LOOKUP TABLE */ +/* ================ */ +/* The following CRC lookup table was generated automagically */ +/* by the Rocksoft^tm Model CRC Algorithm Table Generation */ +/* Program V1.0 using the following model parameters: */ +/* */ +/* Width : 4 bytes. */ +/* Poly : 0x1EDC6F41L */ +/* Reverse : TRUE. */ +/* */ +/* For more information on the Rocksoft^tm Model CRC Algorithm, */ +/* see the document titled "A Painless Guide to CRC Error */ +/* Detection Algorithms" by Ross Williams */ +/* (ross@guest.adelaide.edu.au.). This document is likely to be */ +/* in the FTP archive "ftp.adelaide.edu.au/pub/rocksoft". */ +/* */ +/*****************************************************************/ + +static unsigned long crctable[256] = { + 0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L, + 0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL, + 0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL, + 0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L, + 0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL, + 0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L, + 0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L, + 0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL, + 0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL, + 0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L, + 0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L, + 0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL, + 0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L, + 0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL, + 0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL, + 0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L, + 0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L, + 0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L, + 0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L, + 0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L, + 0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L, + 0x96BF4DCCL, 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L, + 0xDBFC821CL, 0x2997011FL, 0x3AC7F2EBL, 0xC8AC71E8L, + 0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, 0x0F36E6F7L, + 0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L, + 0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L, + 0xEB1FCBADL, 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L, + 0x2C855CB2L, 0xDEEEDFB1L, 0xCDBE2C45L, 0x3FD5AF46L, + 0x7198540DL, 0x83F3D70EL, 0x90A324FAL, 0x62C8A7F9L, + 0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L, + 0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L, + 0x3CDB9BDDL, 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L, + 0x82F63B78L, 0x709DB87BL, 0x63CD4B8FL, 0x91A6C88CL, + 0x456CAC67L, 0xB7072F64L, 0xA457DC90L, 0x563C5F93L, + 0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L, + 0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL, + 0x92A8FC17L, 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L, + 0x55326B08L, 0xA759E80BL, 0xB4091BFFL, 0x466298FCL, + 0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, 0x0B21572CL, + 0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L, + 0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L, + 0x65D122B9L, 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL, + 0x2892ED69L, 0xDAF96E6AL, 0xC9A99D9EL, 0x3BC21E9DL, + 0xEF087A76L, 0x1D63F975L, 0x0E330A81L, 0xFC588982L, + 0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL, + 0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L, + 0x38CC2A06L, 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L, + 0xFF56BD19L, 0x0D3D3E1AL, 0x1E6DCDEEL, 0xEC064EEDL, + 0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, 0xD0DDD530L, + 0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL, + 0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL, + 0x8ECEE914L, 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L, + 0xD3D3E1ABL, 0x21B862A8L, 0x32E8915CL, 0xC083125FL, + 0x144976B4L, 0xE622F5B7L, 0xF5720643L, 0x07198540L, + 0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L, + 0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL, + 0xE330A81AL, 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL, + 0x24AA3F05L, 0xD6C1BC06L, 0xC5914FF2L, 0x37FACCF1L, + 0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, 0x7AB90321L, + 0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL, + 0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L, + 0x34F4F86AL, 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL, + 0x79B737BAL, 0x8BDCB4B9L, 0x988C474DL, 0x6AE7C44EL, + 0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, 0xAD7D5351L +}; + +unsigned long crc32c(char *buf, int len) +{ + unsigned long crc = 0xffffffff; + while (len-- > 0) { + crc = (crc>>8) ^ crctable[(crc ^ (*buf++)) & 0xFF]; + } + return crc^0xffffffff; +} +