sys/dev/disk/iscsi/initiator/isc_subr.c

   1 /*-
   2  * Copyright (c) 2005-2008 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  * $FreeBSD: src/sys/dev/iscsi/initiator/isc_subr.c,v 1.3 2009/02/14 11:34:57 rrs Exp $
  27  */
  28 /*
  29  | iSCSI
  30  | $Id: isc_subr.c,v 1.20 2006/12/01 09:10:17 danny Exp danny $
  31  */
  32
  33 #include "opt_iscsi_initiator.h"
  34
  35 #include <sys/param.h>
  36 #include <sys/kernel.h>
  37 #include <sys/conf.h>
  38 #include <sys/systm.h>
  39 #include <sys/malloc.h>
  40 #include <sys/ctype.h>
  41 #include <sys/errno.h>
  42 #include <sys/sysctl.h>
  43 #include <sys/file.h>
  44 #include <sys/uio.h>
  45 #include <sys/socketvar.h>
  46 #include <sys/socket.h>
  47 #include <sys/protosw.h>
  48 #include <sys/proc.h>
  49 #include <sys/ioccom.h>
  50 #include <sys/queue.h>
  51 #include <sys/kthread.h>
  52 #include <sys/syslog.h>
  53 #include <sys/mbuf.h>
  54 #include <sys/libkern.h>
  55 #include <sys/eventhandler.h>
  56 #include <sys/mutex.h>
  57 #include <sys/mutex2.h>
  58
  59 #include <bus/cam/cam.h>
  60
  61 #include "dev/disk/iscsi/initiator/iscsi.h"
  62 #include "dev/disk/iscsi/initiator/iscsivar.h"
  63
  64 static char *
  65 i_strdupin(char *s, size_t maxlen)
  66 {
  67      size_t     len;
  68      char       *p, *q;
  69
  70      p = kmalloc(maxlen, M_ISCSI, M_WAITOK);
  71      if(copyinstr(s, p, maxlen, &len)) {
  72           kfree(p, M_ISCSI);
  73           return NULL;
  74      }
  75      q = kmalloc(len, M_ISCSI, M_WAITOK);
  76      bcopy(p, q, len);
  77      kfree(p, M_ISCSI);
  78
  79      return q;
  80 }
  81
  82 /*
  83  | XXX: not finished coding
  84  */
  85 int
  86 i_setopt(isc_session_t *sp, isc_opt_t *opt)
  87 {
  88      const int  digsize = 6;
  89      size_t     len;
  90      char       hdigest[digsize], ddigest[digsize];
  91
  92      debug_called(8);
  93      if(opt->maxRecvDataSegmentLength > 0) {
  94           sp->opt.maxRecvDataSegmentLength = opt->maxRecvDataSegmentLength;
  95           sdebug(2, "maxRecvDataSegmentLength=%d", sp->opt.maxRecvDataSegmentLength);
  96      }
  97      if(opt->maxXmitDataSegmentLength > 0) {
  98           // danny's RFC
  99           sp->opt.maxXmitDataSegmentLength = opt->maxXmitDataSegmentLength;
 100           sdebug(2, "maXmitDataSegmentLength=%d", sp->opt.maxXmitDataSegmentLength);
 101      }
 102      if(opt->maxBurstLength != 0) {
 103           sp->opt.maxBurstLength = opt->maxBurstLength;
 104           sdebug(2, "maxBurstLength=%d", sp->opt.maxBurstLength);
 105      }
 106
 107      if(opt->targetAddress != NULL) {
 108           if(sp->opt.targetAddress != NULL)
 109                kfree(sp->opt.targetAddress, M_ISCSI);
 110           sp->opt.targetAddress = i_strdupin(opt->targetAddress, 128);
 111           sdebug(4, "opt.targetAddress='%s'", sp->opt.targetAddress);
 112      }
 113      if(opt->targetName != NULL) {
 114           if(sp->opt.targetName != NULL)
 115                kfree(sp->opt.targetName, M_ISCSI);
 116           sp->opt.targetName = i_strdupin(opt->targetName, 128);
 117           sdebug(4, "opt.targetName='%s'", sp->opt.targetName);
 118      }
 119      if(opt->initiatorName != NULL) {
 120           if(sp->opt.initiatorName != NULL)
 121                kfree(sp->opt.initiatorName, M_ISCSI);
 122           sp->opt.initiatorName = i_strdupin(opt->initiatorName, 128);
 123           sdebug(4, "opt.initiatorName='%s'", sp->opt.initiatorName);
 124      }
 125
 126      if(opt->maxluns > 0) {
 127           if(opt->maxluns > ISCSI_MAX_LUNS)
 128                sp->opt.maxluns = ISCSI_MAX_LUNS; // silently chop it down ...
 129           sp->opt.maxluns = opt->maxluns;
 130           sdebug(4, "opt.maxluns=%d", sp->opt.maxluns);
 131      }
 132
 133      /* Try to copy the userland pointer containing the header digest */
 134      if(opt->headerDigest != NULL) {
 135           if ((copyinstr(opt->headerDigest, &hdigest, digsize, &len)) != EFAULT) {
 136                sdebug(2, "opt.headerDigest='%s'", hdigest);
 137                if(strcmp(hdigest, "CRC32C") == 0) {
 138                     sp->hdrDigest = (digest_t *)crc32_ext;
 139                     sdebug(2, "headerDigest set");
 140                }
 141           }
 142      }
 143      /* Try to copy the userland pointer containing the data digest */
 144      if(opt->dataDigest != NULL) {
 145           if ((copyinstr(opt->dataDigest, &ddigest, digsize, &len)) != EFAULT) {
 146                if (strcmp(ddigest, "CRC32C") == 0) {
 147                     sp->dataDigest = (digest_t *)crc32_ext;
 148                     sdebug(2, "dataDigest set");
 149                }
 150           }
 151      }
 152
 153      return 0;
 154 }
 155
 156 void
 157 i_freeopt(isc_opt_t *opt)
 158 {
 159      if(opt->targetAddress != NULL) {
 160           kfree(opt->targetAddress, M_ISCSI);
 161           opt->targetAddress = NULL;
 162      }
 163      if(opt->targetName != NULL) {
 164           kfree(opt->targetName, M_ISCSI);
 165           opt->targetName = NULL;
 166      }
 167      if(opt->initiatorName != NULL) {
 168           kfree(opt->initiatorName, M_ISCSI);
 169           opt->initiatorName = NULL;
 170      }
 171 }