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1 | /* |
2 | * Copyright 2012-2013 Intel Corporation All Rights Reserved. | |
3 | * All rights reserved. | |
4 | * | |
5 | * http://opensource.org/licenses/BSD-3-Clause | |
6 | * | |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * | |
11 | * * Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * | |
14 | * * Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in | |
16 | * the documentation and/or other materials provided with the | |
17 | * distribution. | |
18 | * | |
19 | * * Neither the name of the Intel Corporation nor the names of its | |
20 | * contributors may be used to endorse or promote products derived | |
21 | * from this software without specific prior written permission. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
24 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
25 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
26 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
27 | * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
28 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
29 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
30 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
32 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
34 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
35 | */ | |
36 | ||
37 | #include "include/int_types.h" | |
38 | ||
39 | #define MAX_ITER 8 | |
40 | ||
41 | unsigned long crc32_table_iscsi_base[256] = { | |
42 | 0x00000000, 0xF26B8303, 0xE13B70F7, 0x1350F3F4, | |
43 | 0xC79A971F, 0x35F1141C, 0x26A1E7E8, 0xD4CA64EB, | |
44 | 0x8AD958CF, 0x78B2DBCC, 0x6BE22838, 0x9989AB3B, | |
45 | 0x4D43CFD0, 0xBF284CD3, 0xAC78BF27, 0x5E133C24, | |
46 | 0x105EC76F, 0xE235446C, 0xF165B798, 0x030E349B, | |
47 | 0xD7C45070, 0x25AFD373, 0x36FF2087, 0xC494A384, | |
48 | 0x9A879FA0, 0x68EC1CA3, 0x7BBCEF57, 0x89D76C54, | |
49 | 0x5D1D08BF, 0xAF768BBC, 0xBC267848, 0x4E4DFB4B, | |
50 | 0x20BD8EDE, 0xD2D60DDD, 0xC186FE29, 0x33ED7D2A, | |
51 | 0xE72719C1, 0x154C9AC2, 0x061C6936, 0xF477EA35, | |
52 | 0xAA64D611, 0x580F5512, 0x4B5FA6E6, 0xB93425E5, | |
53 | 0x6DFE410E, 0x9F95C20D, 0x8CC531F9, 0x7EAEB2FA, | |
54 | 0x30E349B1, 0xC288CAB2, 0xD1D83946, 0x23B3BA45, | |
55 | 0xF779DEAE, 0x05125DAD, 0x1642AE59, 0xE4292D5A, | |
56 | 0xBA3A117E, 0x4851927D, 0x5B016189, 0xA96AE28A, | |
57 | 0x7DA08661, 0x8FCB0562, 0x9C9BF696, 0x6EF07595, | |
58 | 0x417B1DBC, 0xB3109EBF, 0xA0406D4B, 0x522BEE48, | |
59 | 0x86E18AA3, 0x748A09A0, 0x67DAFA54, 0x95B17957, | |
60 | 0xCBA24573, 0x39C9C670, 0x2A993584, 0xD8F2B687, | |
61 | 0x0C38D26C, 0xFE53516F, 0xED03A29B, 0x1F682198, | |
62 | 0x5125DAD3, 0xA34E59D0, 0xB01EAA24, 0x42752927, | |
63 | 0x96BF4DCC, 0x64D4CECF, 0x77843D3B, 0x85EFBE38, | |
64 | 0xDBFC821C, 0x2997011F, 0x3AC7F2EB, 0xC8AC71E8, | |
65 | 0x1C661503, 0xEE0D9600, 0xFD5D65F4, 0x0F36E6F7, | |
66 | 0x61C69362, 0x93AD1061, 0x80FDE395, 0x72966096, | |
67 | 0xA65C047D, 0x5437877E, 0x4767748A, 0xB50CF789, | |
68 | 0xEB1FCBAD, 0x197448AE, 0x0A24BB5A, 0xF84F3859, | |
69 | 0x2C855CB2, 0xDEEEDFB1, 0xCDBE2C45, 0x3FD5AF46, | |
70 | 0x7198540D, 0x83F3D70E, 0x90A324FA, 0x62C8A7F9, | |
71 | 0xB602C312, 0x44694011, 0x5739B3E5, 0xA55230E6, | |
72 | 0xFB410CC2, 0x092A8FC1, 0x1A7A7C35, 0xE811FF36, | |
73 | 0x3CDB9BDD, 0xCEB018DE, 0xDDE0EB2A, 0x2F8B6829, | |
74 | 0x82F63B78, 0x709DB87B, 0x63CD4B8F, 0x91A6C88C, | |
75 | 0x456CAC67, 0xB7072F64, 0xA457DC90, 0x563C5F93, | |
76 | 0x082F63B7, 0xFA44E0B4, 0xE9141340, 0x1B7F9043, | |
77 | 0xCFB5F4A8, 0x3DDE77AB, 0x2E8E845F, 0xDCE5075C, | |
78 | 0x92A8FC17, 0x60C37F14, 0x73938CE0, 0x81F80FE3, | |
79 | 0x55326B08, 0xA759E80B, 0xB4091BFF, 0x466298FC, | |
80 | 0x1871A4D8, 0xEA1A27DB, 0xF94AD42F, 0x0B21572C, | |
81 | 0xDFEB33C7, 0x2D80B0C4, 0x3ED04330, 0xCCBBC033, | |
82 | 0xA24BB5A6, 0x502036A5, 0x4370C551, 0xB11B4652, | |
83 | 0x65D122B9, 0x97BAA1BA, 0x84EA524E, 0x7681D14D, | |
84 | 0x2892ED69, 0xDAF96E6A, 0xC9A99D9E, 0x3BC21E9D, | |
85 | 0xEF087A76, 0x1D63F975, 0x0E330A81, 0xFC588982, | |
86 | 0xB21572C9, 0x407EF1CA, 0x532E023E, 0xA145813D, | |
87 | 0x758FE5D6, 0x87E466D5, 0x94B49521, 0x66DF1622, | |
88 | 0x38CC2A06, 0xCAA7A905, 0xD9F75AF1, 0x2B9CD9F2, | |
89 | 0xFF56BD19, 0x0D3D3E1A, 0x1E6DCDEE, 0xEC064EED, | |
90 | 0xC38D26C4, 0x31E6A5C7, 0x22B65633, 0xD0DDD530, | |
91 | 0x0417B1DB, 0xF67C32D8, 0xE52CC12C, 0x1747422F, | |
92 | 0x49547E0B, 0xBB3FFD08, 0xA86F0EFC, 0x5A048DFF, | |
93 | 0x8ECEE914, 0x7CA56A17, 0x6FF599E3, 0x9D9E1AE0, | |
94 | 0xD3D3E1AB, 0x21B862A8, 0x32E8915C, 0xC083125F, | |
95 | 0x144976B4, 0xE622F5B7, 0xF5720643, 0x07198540, | |
96 | 0x590AB964, 0xAB613A67, 0xB831C993, 0x4A5A4A90, | |
97 | 0x9E902E7B, 0x6CFBAD78, 0x7FAB5E8C, 0x8DC0DD8F, | |
98 | 0xE330A81A, 0x115B2B19, 0x020BD8ED, 0xF0605BEE, | |
99 | 0x24AA3F05, 0xD6C1BC06, 0xC5914FF2, 0x37FACCF1, | |
100 | 0x69E9F0D5, 0x9B8273D6, 0x88D28022, 0x7AB90321, | |
101 | 0xAE7367CA, 0x5C18E4C9, 0x4F48173D, 0xBD23943E, | |
102 | 0xF36E6F75, 0x0105EC76, 0x12551F82, 0xE03E9C81, | |
103 | 0x34F4F86A, 0xC69F7B69, 0xD5CF889D, 0x27A40B9E, | |
104 | 0x79B737BA, 0x8BDCB4B9, 0x988C474D, 0x6AE7C44E, | |
105 | 0xBE2DA0A5, 0x4C4623A6, 0x5F16D052, 0xAD7D5351, | |
106 | }; | |
107 | ||
108 | ||
109 | // iSCSI CRC baseline function | |
110 | uint32_t ceph_crc32c_intel_baseline(uint32_t crc_init2, unsigned char const *buffer, unsigned len) | |
111 | { | |
112 | unsigned int crc_init = crc_init2; | |
113 | unsigned int crc; | |
114 | unsigned char* p_buf; | |
115 | ||
116 | if (buffer) { | |
117 | p_buf = (unsigned char*)buffer; | |
118 | unsigned char const * p_end = buffer + len; | |
119 | ||
120 | crc = crc_init; | |
121 | ||
122 | while (p_buf < (unsigned char *) p_end ){ | |
123 | crc = (crc >> 8) ^ crc32_table_iscsi_base[(crc & 0x000000FF) ^ *p_buf++]; | |
124 | } | |
125 | } else { | |
126 | crc = crc_init; | |
127 | while (len--) { | |
128 | crc = (crc >> 8) ^ crc32_table_iscsi_base[(crc & 0x000000FF)]; | |
129 | } | |
130 | ||
131 | } | |
132 | return crc; | |
133 | } |