sbin/hammer2/icrc.c

   1 /*-
   2  * Copyright (c) 2005-2010 Daniel Braniss <danny@cs.huji.ac.il>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  */
  27 /*
  28  | iSCSI
  29  | $Id: isc_subr.c 560 2009-05-07 07:37:49Z danny $
  30  */
  31
  32 #include <sys/types.h>
  33 #include <sys/uuid.h>
  34 #include <sys/dmsg.h>
  35
  36 #include <vfs/hammer2/hammer2_disk.h>
  37
  38 #include "hammer2.h"
  39
  40 /*****************************************************************/
  41 /*                                                               */
  42 /* CRC LOOKUP TABLE                                              */
  43 /* ================                                              */
  44 /* The following CRC lookup table was generated automagically    */
  45 /* by the Rocksoft^tm Model CRC Algorithm Table Generation       */
  46 /* Program V1.0 using the following model parameters:            */
  47 /*                                                               */
  48 /*    Width   : 4 bytes.                                         */
  49 /*    Poly    : 0x1EDC6F41L                                      */
  50 /*    Reverse : TRUE.                                            */
  51 /*                                                               */
  52 /* For more information on the Rocksoft^tm Model CRC Algorithm,  */
  53 /* see the document titled "A Painless Guide to CRC Error        */
  54 /* Detection Algorithms" by Ross Williams                        */
  55 /* (ross@guest.adelaide.edu.au.). This document is likely to be  */
  56 /* in the FTP archive "ftp.adelaide.edu.au/pub/rocksoft".        */
  57 /*                                                               */
  58 /*****************************************************************/
  59
  60 static const uint32_t crc32Table[256] = {
  61     0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L,
  62     0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL,
  63     0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL,
  64     0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L,
  65     0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL,
  66     0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L,
  67     0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L,
  68     0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL,
  69     0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL,
  70     0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L,
  71     0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L,
  72     0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL,
  73     0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L,
  74     0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL,
  75     0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL,
  76     0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L,
  77     0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L,
  78     0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L,
  79     0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L,
  80     0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L,
  81     0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L,
  82     0x96BF4DCCL, 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L,
  83     0xDBFC821CL, 0x2997011FL, 0x3AC7F2EBL, 0xC8AC71E8L,
  84     0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, 0x0F36E6F7L,
  85     0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L,
  86     0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L,
  87     0xEB1FCBADL, 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L,
  88     0x2C855CB2L, 0xDEEEDFB1L, 0xCDBE2C45L, 0x3FD5AF46L,
  89     0x7198540DL, 0x83F3D70EL, 0x90A324FAL, 0x62C8A7F9L,
  90     0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L,
  91     0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L,
  92     0x3CDB9BDDL, 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L,
  93     0x82F63B78L, 0x709DB87BL, 0x63CD4B8FL, 0x91A6C88CL,
  94     0x456CAC67L, 0xB7072F64L, 0xA457DC90L, 0x563C5F93L,
  95     0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L,
  96     0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL,
  97     0x92A8FC17L, 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L,
  98     0x55326B08L, 0xA759E80BL, 0xB4091BFFL, 0x466298FCL,
  99     0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, 0x0B21572CL,
 100     0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L,
 101     0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L,
 102     0x65D122B9L, 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL,
 103     0x2892ED69L, 0xDAF96E6AL, 0xC9A99D9EL, 0x3BC21E9DL,
 104     0xEF087A76L, 0x1D63F975L, 0x0E330A81L, 0xFC588982L,
 105     0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL,
 106     0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L,
 107     0x38CC2A06L, 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L,
 108     0xFF56BD19L, 0x0D3D3E1AL, 0x1E6DCDEEL, 0xEC064EEDL,
 109     0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, 0xD0DDD530L,
 110     0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL,
 111     0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL,
 112     0x8ECEE914L, 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L,
 113     0xD3D3E1ABL, 0x21B862A8L, 0x32E8915CL, 0xC083125FL,
 114     0x144976B4L, 0xE622F5B7L, 0xF5720643L, 0x07198540L,
 115     0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L,
 116     0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL,
 117     0xE330A81AL, 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL,
 118     0x24AA3F05L, 0xD6C1BC06L, 0xC5914FF2L, 0x37FACCF1L,
 119     0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, 0x7AB90321L,
 120     0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL,
 121     0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L,
 122     0x34F4F86AL, 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL,
 123     0x79B737BAL, 0x8BDCB4B9L, 0x988C474DL, 0x6AE7C44EL,
 124     0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, 0xAD7D5351L
 125 };
 126
 127 uint32_t
 128 hammer2_icrc32(const void *buf, size_t size)
 129 {
 130      const uint8_t *p = buf;
 131      uint32_t crc = 0;
 132
 133      crc = crc ^ 0xffffffff;
 134      while (size--)
 135           crc = crc32Table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
 136      crc = crc ^ 0xffffffff;
 137      return crc;
 138 }
 139
 140 uint32_t
 141 hammer2_icrc32c(const void *buf, size_t size, uint32_t crc)
 142 {
 143      const uint8_t *p = buf;
 144
 145      crc = crc ^ 0xffffffff;
 146      while (size--)
 147           crc = crc32Table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
 148      crc = crc ^ 0xffffffff;
 149      return crc;
 150 }