hammer2 - SPAN protocol work
[dragonfly.git] / sbin / hammer2 / icrc.c
CommitLineData
9ab15106
MD
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
35#include <vfs/hammer2/hammer2_disk.h>
36
37/*****************************************************************/
38/* */
39/* CRC LOOKUP TABLE */
40/* ================ */
41/* The following CRC lookup table was generated automagically */
42/* by the Rocksoft^tm Model CRC Algorithm Table Generation */
43/* Program V1.0 using the following model parameters: */
44/* */
45/* Width : 4 bytes. */
46/* Poly : 0x1EDC6F41L */
47/* Reverse : TRUE. */
48/* */
49/* For more information on the Rocksoft^tm Model CRC Algorithm, */
50/* see the document titled "A Painless Guide to CRC Error */
51/* Detection Algorithms" by Ross Williams */
52/* (ross@guest.adelaide.edu.au.). This document is likely to be */
53/* in the FTP archive "ftp.adelaide.edu.au/pub/rocksoft". */
54/* */
55/*****************************************************************/
56
02454b3e 57static const uint32_t crc32Table[256] = {
9ab15106
MD
58 0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L,
59 0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL,
60 0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL,
61 0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L,
62 0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL,
63 0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L,
64 0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L,
65 0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL,
66 0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL,
67 0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L,
68 0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L,
69 0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL,
70 0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L,
71 0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL,
72 0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL,
73 0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L,
74 0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L,
75 0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L,
76 0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L,
77 0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L,
78 0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L,
79 0x96BF4DCCL, 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L,
80 0xDBFC821CL, 0x2997011FL, 0x3AC7F2EBL, 0xC8AC71E8L,
81 0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, 0x0F36E6F7L,
82 0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L,
83 0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L,
84 0xEB1FCBADL, 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L,
85 0x2C855CB2L, 0xDEEEDFB1L, 0xCDBE2C45L, 0x3FD5AF46L,
86 0x7198540DL, 0x83F3D70EL, 0x90A324FAL, 0x62C8A7F9L,
87 0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L,
88 0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L,
89 0x3CDB9BDDL, 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L,
90 0x82F63B78L, 0x709DB87BL, 0x63CD4B8FL, 0x91A6C88CL,
91 0x456CAC67L, 0xB7072F64L, 0xA457DC90L, 0x563C5F93L,
92 0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L,
93 0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL,
94 0x92A8FC17L, 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L,
95 0x55326B08L, 0xA759E80BL, 0xB4091BFFL, 0x466298FCL,
96 0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, 0x0B21572CL,
97 0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L,
98 0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L,
99 0x65D122B9L, 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL,
100 0x2892ED69L, 0xDAF96E6AL, 0xC9A99D9EL, 0x3BC21E9DL,
101 0xEF087A76L, 0x1D63F975L, 0x0E330A81L, 0xFC588982L,
102 0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL,
103 0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L,
104 0x38CC2A06L, 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L,
105 0xFF56BD19L, 0x0D3D3E1AL, 0x1E6DCDEEL, 0xEC064EEDL,
106 0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, 0xD0DDD530L,
107 0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL,
108 0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL,
109 0x8ECEE914L, 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L,
110 0xD3D3E1ABL, 0x21B862A8L, 0x32E8915CL, 0xC083125FL,
111 0x144976B4L, 0xE622F5B7L, 0xF5720643L, 0x07198540L,
112 0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L,
113 0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL,
114 0xE330A81AL, 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL,
115 0x24AA3F05L, 0xD6C1BC06L, 0xC5914FF2L, 0x37FACCF1L,
116 0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, 0x7AB90321L,
117 0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL,
118 0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L,
119 0x34F4F86AL, 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL,
120 0x79B737BAL, 0x8BDCB4B9L, 0x988C474DL, 0x6AE7C44EL,
121 0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, 0xAD7D5351L
122};
123
124uint32_t
125hammer2_icrc32(const void *buf, size_t size)
126{
127 const uint8_t *p = buf;
128 uint32_t crc = 0;
129
130 crc = crc ^ 0xffffffff;
131 while (size--)
132 crc = crc32Table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
133 crc = crc ^ 0xffffffff;
134 return crc;
135}
136
137uint32_t
138hammer2_icrc32c(const void *buf, size_t size, uint32_t crc)
139{
140 const uint8_t *p = buf;
141
142 crc = crc ^ 0xffffffff;
143 while (size--)
144 crc = crc32Table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
145 crc = crc ^ 0xffffffff;
146 return crc;
147}