1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/* $OpenBSD: criov.c,v 1.9 2002/01/29 15:48:29 jason Exp $ */
/*
* Linux port done by David McCullough <david_mccullough@mcafee.com>
* Copyright (C) 2006-2010 David McCullough
* Copyright (C) 2004-2005 Intel Corporation.
* The license and original author are listed below.
*
* Copyright (c) 1999 Theo de Raadt
*
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*
__FBSDID("$FreeBSD: src/sys/opencrypto/criov.c,v 1.5 2006/06/04 22:15:13 pjd Exp $");
*/
#ifndef AUTOCONF_INCLUDED
#include <linux/config.h>
#endif
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/uio.h>
#include <linux/skbuff.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <asm/io.h>
#include <uio.h>
#include <cryptodev.h>
/*
* This macro is only for avoiding code duplication, as we need to skip
* given number of bytes in the same way in three functions below.
*/
#define CUIO_SKIP() do { \
KASSERT(off >= 0, ("%s: off %d < 0", __func__, off)); \
KASSERT(len >= 0, ("%s: len %d < 0", __func__, len)); \
while (off > 0) { \
KASSERT(iol >= 0, ("%s: empty in skip", __func__)); \
if (off < iov->iov_len) \
break; \
off -= iov->iov_len; \
iol--; \
iov++; \
} \
} while (0)
void
cuio_copydata(struct uio* uio, int off, int len, caddr_t cp)
{
struct iovec *iov = uio->uio_iov;
int iol = uio->uio_iovcnt;
unsigned count;
CUIO_SKIP();
while (len > 0) {
KASSERT(iol >= 0, ("%s: empty", __func__));
count = min((int)(iov->iov_len - off), len);
memcpy(cp, ((caddr_t)iov->iov_base) + off, count);
len -= count;
cp += count;
off = 0;
iol--;
iov++;
}
}
void
cuio_copyback(struct uio* uio, int off, int len, caddr_t cp)
{
struct iovec *iov = uio->uio_iov;
int iol = uio->uio_iovcnt;
unsigned count;
CUIO_SKIP();
while (len > 0) {
KASSERT(iol >= 0, ("%s: empty", __func__));
count = min((int)(iov->iov_len - off), len);
memcpy(((caddr_t)iov->iov_base) + off, cp, count);
len -= count;
cp += count;
off = 0;
iol--;
iov++;
}
}
/*
* Return a pointer to iov/offset of location in iovec list.
*/
struct iovec *
cuio_getptr(struct uio *uio, int loc, int *off)
{
struct iovec *iov = uio->uio_iov;
int iol = uio->uio_iovcnt;
while (loc >= 0) {
/* Normal end of search */
if (loc < iov->iov_len) {
*off = loc;
return (iov);
}
loc -= iov->iov_len;
if (iol == 0) {
if (loc == 0) {
/* Point at the end of valid data */
*off = iov->iov_len;
return (iov);
} else
return (NULL);
} else {
iov++, iol--;
}
}
return (NULL);
}
EXPORT_SYMBOL(cuio_copyback);
EXPORT_SYMBOL(cuio_copydata);
EXPORT_SYMBOL(cuio_getptr);
static void
skb_copy_bits_back(struct sk_buff *skb, int offset, caddr_t cp, int len)
{
int i;
if (offset < skb_headlen(skb)) {
memcpy(skb->data + offset, cp, min_t(int, skb_headlen(skb), len));
len -= skb_headlen(skb);
cp += skb_headlen(skb);
}
offset -= skb_headlen(skb);
for (i = 0; len > 0 && i < skb_shinfo(skb)->nr_frags; i++) {
if (offset < skb_shinfo(skb)->frags[i].size) {
memcpy(page_address(skb_shinfo(skb)->frags[i].page) +
skb_shinfo(skb)->frags[i].page_offset,
cp, min_t(int, skb_shinfo(skb)->frags[i].size, len));
len -= skb_shinfo(skb)->frags[i].size;
cp += skb_shinfo(skb)->frags[i].size;
}
offset -= skb_shinfo(skb)->frags[i].size;
}
}
void
crypto_copyback(int flags, caddr_t buf, int off, int size, caddr_t in)
{
if ((flags & CRYPTO_F_SKBUF) != 0)
skb_copy_bits_back((struct sk_buff *)buf, off, in, size);
else if ((flags & CRYPTO_F_IOV) != 0)
cuio_copyback((struct uio *)buf, off, size, in);
else
bcopy(in, buf + off, size);
}
void
crypto_copydata(int flags, caddr_t buf, int off, int size, caddr_t out)
{
if ((flags & CRYPTO_F_SKBUF) != 0)
skb_copy_bits((struct sk_buff *)buf, off, out, size);
else if ((flags & CRYPTO_F_IOV) != 0)
cuio_copydata((struct uio *)buf, off, size, out);
else
bcopy(buf + off, out, size);
}
int
crypto_apply(int flags, caddr_t buf, int off, int len,
int (*f)(void *, void *, u_int), void *arg)
{
#if 0
int error;
if ((flags & CRYPTO_F_SKBUF) != 0)
error = XXXXXX((struct mbuf *)buf, off, len, f, arg);
else if ((flags & CRYPTO_F_IOV) != 0)
error = cuio_apply((struct uio *)buf, off, len, f, arg);
else
error = (*f)(arg, buf + off, len);
return (error);
#else
KASSERT(0, ("crypto_apply not implemented!\n"));
#endif
return 0;
}
EXPORT_SYMBOL(crypto_copyback);
EXPORT_SYMBOL(crypto_copydata);
EXPORT_SYMBOL(crypto_apply);
|
