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 /*****************************************************************/
  39 /*                                                               */
  40 /* CRC LOOKUP TABLE                                              */
  41 /* ================                                              */
  42 /* The following CRC lookup table was generated automagically    */
  43 /* by the Rocksoft^tm Model CRC Algorithm Table Generation       */
  44 /* Program V1.0 using the following model parameters:            */
  45 /*                                                               */
  46 /*    Width   : 4 bytes.                                         */
  47 /*    Poly    : 0x1EDC6F41L                                      */
  48 /*    Reverse : TRUE.                                            */
  49 /*                                                               */
  50 /* For more information on the Rocksoft^tm Model CRC Algorithm,  */
  51 /* see the document titled "A Painless Guide to CRC Error        */
  52 /* Detection Algorithms" by Ross Williams                        */
  53 /* (ross@guest.adelaide.edu.au.). This document is likely to be  */
  54 /* in the FTP archive "ftp.adelaide.edu.au/pub/rocksoft".        */
  55 /*                                                               */
  56 /*****************************************************************/
  57
  58 static const uint32_t crc32Table[256] = {
  59     0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L,
  60     0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL,
  61     0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL,
  62     0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L,
  63     0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL,
  64     0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L,
  65     0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L,
  66     0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL,
  67     0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL,
  68     0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L,
  69     0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L,
  70     0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL,
  71     0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L,
  72     0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL,
  73     0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL,
  74     0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L,
  75     0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L,
  76     0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L,
  77     0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L,
  78     0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L,
  79     0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L,
  80     0x96BF4DCCL, 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L,
  81     0xDBFC821CL, 0x2997011FL, 0x3AC7F2EBL, 0xC8AC71E8L,
  82     0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, 0x0F36E6F7L,
  83     0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L,
  84     0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L,
  85     0xEB1FCBADL, 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L,
  86     0x2C855CB2L, 0xDEEEDFB1L, 0xCDBE2C45L, 0x3FD5AF46L,
  87     0x7198540DL, 0x83F3D70EL, 0x90A324FAL, 0x62C8A7F9L,
  88     0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L,
  89     0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L,
  90     0x3CDB9BDDL, 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L,
  91     0x82F63B78L, 0x709DB87BL, 0x63CD4B8FL, 0x91A6C88CL,
  92     0x456CAC67L, 0xB7072F64L, 0xA457DC90L, 0x563C5F93L,
  93     0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L,
  94     0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL,
  95     0x92A8FC17L, 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L,
  96     0x55326B08L, 0xA759E80BL, 0xB4091BFFL, 0x466298FCL,
  97     0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, 0x0B21572CL,
  98     0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L,
  99     0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L,
 100     0x65D122B9L, 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL,
 101     0x2892ED69L, 0xDAF96E6AL, 0xC9A99D9EL, 0x3BC21E9DL,
 102     0xEF087A76L, 0x1D63F975L, 0x0E330A81L, 0xFC588982L,
 103     0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL,
 104     0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L,
 105     0x38CC2A06L, 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L,
 106     0xFF56BD19L, 0x0D3D3E1AL, 0x1E6DCDEEL, 0xEC064EEDL,
 107     0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, 0xD0DDD530L,
 108     0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL,
 109     0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL,
 110     0x8ECEE914L, 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L,
 111     0xD3D3E1ABL, 0x21B862A8L, 0x32E8915CL, 0xC083125FL,
 112     0x144976B4L, 0xE622F5B7L, 0xF5720643L, 0x07198540L,
 113     0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L,
 114     0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL,
 115     0xE330A81AL, 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL,
 116     0x24AA3F05L, 0xD6C1BC06L, 0xC5914FF2L, 0x37FACCF1L,
 117     0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, 0x7AB90321L,
 118     0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL,
 119     0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L,
 120     0x34F4F86AL, 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL,
 121     0x79B737BAL, 0x8BDCB4B9L, 0x988C474DL, 0x6AE7C44EL,
 122     0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, 0xAD7D5351L
 123 };
 124
 125 uint32_t
 126 hammer2_icrc32(const void *buf, size_t size)
 127 {
 128      const uint8_t *p = buf;
 129      uint32_t crc = 0;
 130
 131      crc = crc ^ 0xffffffff;
 132      while (size--)
 133           crc = crc32Table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
 134      crc = crc ^ 0xffffffff;
 135      return crc;
 136 }
 137
 138 uint32_t
 139 hammer2_icrc32c(const void *buf, size_t size, uint32_t crc)
 140 {
 141      const uint8_t *p = buf;
 142
 143      crc = crc ^ 0xffffffff;
 144      while (size--)
 145           crc = crc32Table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
 146      crc = crc ^ 0xffffffff;
 147      return crc;
 148 }