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/queue.h>
50 #include <sys/kthread.h>
51 #include <sys/syslog.h>
52 #include <sys/mbuf.h>
53 #include <sys/libkern.h>
54 #include <sys/eventhandler.h>
55
56 #include <bus/cam/cam.h>
57
58 #include "dev/disk/iscsi/initiator/iscsi.h"
59 #include "dev/disk/iscsi/initiator/iscsivar.h"
60
61 static char *
i_strdupin(char * s,size_t maxlen)62 i_strdupin(char *s, size_t maxlen)
63 {
64 size_t len;
65 char *p, *q;
66
67 p = kmalloc(maxlen, M_ISCSI, M_WAITOK);
68 if(copyinstr(s, p, maxlen, &len)) {
69 kfree(p, M_ISCSI);
70 return NULL;
71 }
72 q = kmalloc(len, M_ISCSI, M_WAITOK);
73 bcopy(p, q, len);
74 kfree(p, M_ISCSI);
75
76 return q;
77 }
78
79 /*
80 | XXX: not finished coding
81 */
82 int
i_setopt(isc_session_t * sp,isc_opt_t * opt)83 i_setopt(isc_session_t *sp, isc_opt_t *opt)
84 {
85 const int digsize = 6;
86 size_t len;
87 char hdigest[digsize], ddigest[digsize];
88
89 debug_called(8);
90 if(opt->maxRecvDataSegmentLength > 0) {
91 sp->opt.maxRecvDataSegmentLength = opt->maxRecvDataSegmentLength;
92 sdebug(2, "maxRecvDataSegmentLength=%d", sp->opt.maxRecvDataSegmentLength);
93 }
94 if(opt->maxXmitDataSegmentLength > 0) {
95 // danny's RFC
96 sp->opt.maxXmitDataSegmentLength = opt->maxXmitDataSegmentLength;
97 sdebug(2, "maXmitDataSegmentLength=%d", sp->opt.maxXmitDataSegmentLength);
98 }
99 if(opt->maxBurstLength != 0) {
100 sp->opt.maxBurstLength = opt->maxBurstLength;
101 sdebug(2, "maxBurstLength=%d", sp->opt.maxBurstLength);
102 }
103
104 if(opt->targetAddress != NULL) {
105 if(sp->opt.targetAddress != NULL)
106 kfree(sp->opt.targetAddress, M_ISCSI);
107 sp->opt.targetAddress = i_strdupin(opt->targetAddress, 128);
108 sdebug(4, "opt.targetAddress='%s'", sp->opt.targetAddress);
109 }
110 if(opt->targetName != NULL) {
111 if(sp->opt.targetName != NULL)
112 kfree(sp->opt.targetName, M_ISCSI);
113 sp->opt.targetName = i_strdupin(opt->targetName, 128);
114 sdebug(4, "opt.targetName='%s'", sp->opt.targetName);
115 }
116 if(opt->initiatorName != NULL) {
117 if(sp->opt.initiatorName != NULL)
118 kfree(sp->opt.initiatorName, M_ISCSI);
119 sp->opt.initiatorName = i_strdupin(opt->initiatorName, 128);
120 sdebug(4, "opt.initiatorName='%s'", sp->opt.initiatorName);
121 }
122
123 if(opt->maxluns > 0) {
124 if(opt->maxluns > ISCSI_MAX_LUNS)
125 sp->opt.maxluns = ISCSI_MAX_LUNS; // silently chop it down ...
126 sp->opt.maxluns = opt->maxluns;
127 sdebug(4, "opt.maxluns=%d", sp->opt.maxluns);
128 }
129
130 /* Try to copy the userland pointer containing the header digest */
131 if(opt->headerDigest != NULL) {
132 if ((copyinstr(opt->headerDigest, &hdigest, digsize, &len)) != EFAULT) {
133 sdebug(2, "opt.headerDigest='%s'", hdigest);
134 if(strcmp(hdigest, "CRC32C") == 0) {
135 sp->hdrDigest = (digest_t *)crc32_ext;
136 sdebug(2, "headerDigest set");
137 }
138 }
139 }
140 /* Try to copy the userland pointer containing the data digest */
141 if(opt->dataDigest != NULL) {
142 if ((copyinstr(opt->dataDigest, &ddigest, digsize, &len)) != EFAULT) {
143 if (strcmp(ddigest, "CRC32C") == 0) {
144 sp->dataDigest = (digest_t *)crc32_ext;
145 sdebug(2, "dataDigest set");
146 }
147 }
148 }
149
150 return 0;
151 }
152
153 void
i_freeopt(isc_opt_t * opt)154 i_freeopt(isc_opt_t *opt)
155 {
156 if(opt->targetAddress != NULL) {
157 kfree(opt->targetAddress, M_ISCSI);
158 opt->targetAddress = NULL;
159 }
160 if(opt->targetName != NULL) {
161 kfree(opt->targetName, M_ISCSI);
162 opt->targetName = NULL;
163 }
164 if(opt->initiatorName != NULL) {
165 kfree(opt->initiatorName, M_ISCSI);
166 opt->initiatorName = NULL;
167 }
168 }
169