diff options
Diffstat (limited to 'sys/dev/iscsi_initiator/isc_subr.c')
| -rw-r--r-- | sys/dev/iscsi_initiator/isc_subr.c | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/sys/dev/iscsi_initiator/isc_subr.c b/sys/dev/iscsi_initiator/isc_subr.c new file mode 100644 index 0000000..677c5f1 --- /dev/null +++ b/sys/dev/iscsi_initiator/isc_subr.c @@ -0,0 +1,269 @@ +/*- + * Copyright (c) 2005-2011 Daniel Braniss <danny@cs.huji.ac.il> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ +/* + | iSCSI + | $Id: isc_subr.c 560 2009-05-07 07:37:49Z danny $ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "opt_iscsi_initiator.h" + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/conf.h> +#include <sys/systm.h> +#include <sys/malloc.h> +#include <sys/ctype.h> +#include <sys/errno.h> +#include <sys/sysctl.h> +#include <sys/file.h> +#include <sys/uio.h> +#include <sys/socketvar.h> +#include <sys/socket.h> +#include <sys/protosw.h> +#include <sys/proc.h> +#include <sys/ioccom.h> +#include <sys/queue.h> +#include <sys/kthread.h> +#include <sys/syslog.h> +#include <sys/mbuf.h> +#include <sys/libkern.h> + +#include <dev/iscsi_initiator/iscsi.h> +#include <dev/iscsi_initiator/iscsivar.h> + +static MALLOC_DEFINE(M_ISC, "iSC", "iSCSI driver options"); + +static char * +i_strdupin(char *s, size_t maxlen) +{ + size_t len; + char *p, *q; + + p = malloc(maxlen, M_ISC, M_WAITOK); + if(copyinstr(s, p, maxlen, &len)) { + free(p, M_ISC); + return NULL; + } + q = malloc(len, M_ISC, M_WAITOK); + bcopy(p, q, len); + free(p, M_ISC); + + return q; +} +#if __FreeBSD_version < 800000 +/*****************************************************************/ +/* */ +/* 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 uint32_t crc32Table[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 +}; + +static __inline int +calculate_crc32c(uint32_t crc, const void *buf, size_t size) +{ + const uint8_t *p = buf; + + while (size--) + crc = crc32Table[(crc ^ *p++) & 0xff] ^ (crc >> 8); + return crc; +} +#endif + +static uint32_t +i_crc32c(const void *buf, size_t size, uint32_t crc) +{ + crc = crc ^ 0xffffffff; + crc = calculate_crc32c(crc, buf, size); + crc = crc ^ 0xffffffff; + return crc; +} + +/* + | XXX: not finished coding + */ +int +i_setopt(isc_session_t *sp, isc_opt_t *opt) +{ + if(opt->maxRecvDataSegmentLength > 0) { + sp->opt.maxRecvDataSegmentLength = opt->maxRecvDataSegmentLength; + sdebug(2, "maxRecvDataSegmentLength=%d", sp->opt.maxRecvDataSegmentLength); + } + if(opt->maxXmitDataSegmentLength > 0) { + // danny's RFC + sp->opt.maxXmitDataSegmentLength = opt->maxXmitDataSegmentLength; + sdebug(2, "opt.maXmitDataSegmentLength=%d", sp->opt.maxXmitDataSegmentLength); + } + if(opt->maxBurstLength != 0) { + sp->opt.maxBurstLength = opt->maxBurstLength; + sdebug(2, "opt.maxBurstLength=%d", sp->opt.maxBurstLength); + } + + if(opt->targetAddress != NULL) { + if(sp->opt.targetAddress != NULL) + free(sp->opt.targetAddress, M_ISC); + sp->opt.targetAddress = i_strdupin(opt->targetAddress, 128); + sdebug(2, "opt.targetAddress='%s'", sp->opt.targetAddress); + } + if(opt->targetName != NULL) { + if(sp->opt.targetName != NULL) + free(sp->opt.targetName, M_ISC); + sp->opt.targetName = i_strdupin(opt->targetName, 128); + sdebug(2, "opt.targetName='%s'", sp->opt.targetName); + } + if(opt->initiatorName != NULL) { + if(sp->opt.initiatorName != NULL) + free(sp->opt.initiatorName, M_ISC); + sp->opt.initiatorName = i_strdupin(opt->initiatorName, 128); + sdebug(2, "opt.initiatorName='%s'", sp->opt.initiatorName); + } + + if(opt->maxluns > 0) { + if(opt->maxluns > ISCSI_MAX_LUNS) + sp->opt.maxluns = ISCSI_MAX_LUNS; // silently chop it down ... + sp->opt.maxluns = opt->maxluns; + sdebug(2, "opt.maxluns=%d", sp->opt.maxluns); + } + + if(opt->headerDigest != NULL) { + sdebug(2, "opt.headerDigest='%s'", opt->headerDigest); + if(strcmp(opt->headerDigest, "CRC32C") == 0) { + sp->hdrDigest = (digest_t *)i_crc32c; + sdebug(2, "opt.headerDigest set"); + } + } + if(opt->dataDigest != NULL) { + sdebug(2, "opt.dataDigest='%s'", opt->headerDigest); + if(strcmp(opt->dataDigest, "CRC32C") == 0) { + sp->dataDigest = (digest_t *)i_crc32c; + sdebug(2, "opt.dataDigest set"); + } + } + + return 0; +} + +void +i_freeopt(isc_opt_t *opt) +{ + debug_called(8); + + if(opt->targetAddress != NULL) { + free(opt->targetAddress, M_ISC); + opt->targetAddress = NULL; + } + if(opt->targetName != NULL) { + free(opt->targetName, M_ISC); + opt->targetName = NULL; + } + if(opt->initiatorName != NULL) { + free(opt->initiatorName, M_ISC); + opt->initiatorName = NULL; + } +} |
