1 /* $OpenBSD: criov.c,v 1.9 2002/01/29 15:48:29 jason Exp $ */
4 * Linux port done by David McCullough <david_mccullough@securecomputing.com>
5 * Copyright (C) 2006-2007 David McCullough
6 * Copyright (C) 2004-2005 Intel Corporation.
7 * The license and original author are listed below.
9 * Copyright (c) 1999 Theo de Raadt
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 __FBSDID("$FreeBSD: src/sys/opencrypto/criov.c,v 1.5 2006/06/04 22:15:13 pjd Exp $");
37 #ifndef AUTOCONF_INCLUDED
38 #include <linux/config.h>
40 #include <linux/module.h>
41 #include <linux/init.h>
42 #include <linux/slab.h>
43 #include <linux/uio.h>
44 #include <linux/skbuff.h>
45 #include <linux/kernel.h>
50 #include <cryptodev.h>
53 * This macro is only for avoiding code duplication, as we need to skip
54 * given number of bytes in the same way in three functions below.
56 #define CUIO_SKIP() do { \
57 KASSERT(off >= 0, ("%s: off %d < 0", __func__, off)); \
58 KASSERT(len >= 0, ("%s: len %d < 0", __func__, len)); \
60 KASSERT(iol >= 0, ("%s: empty in skip", __func__)); \
61 if (off < iov->iov_len) \
63 off -= iov->iov_len; \
70 cuio_copydata(struct uio
* uio
, int off
, int len
, caddr_t cp
)
72 struct iovec
*iov
= uio
->uio_iov
;
73 int iol
= uio
->uio_iovcnt
;
78 KASSERT(iol
>= 0, ("%s: empty", __func__
));
79 count
= min((int)(iov
->iov_len
- off
), len
);
80 memcpy(cp
, ((caddr_t
)iov
->iov_base
) + off
, count
);
90 cuio_copyback(struct uio
* uio
, int off
, int len
, caddr_t cp
)
92 struct iovec
*iov
= uio
->uio_iov
;
93 int iol
= uio
->uio_iovcnt
;
98 KASSERT(iol
>= 0, ("%s: empty", __func__
));
99 count
= min((int)(iov
->iov_len
- off
), len
);
100 memcpy(((caddr_t
)iov
->iov_base
) + off
, cp
, count
);
110 * Return a pointer to iov/offset of location in iovec list.
113 cuio_getptr(struct uio
*uio
, int loc
, int *off
)
115 struct iovec
*iov
= uio
->uio_iov
;
116 int iol
= uio
->uio_iovcnt
;
119 /* Normal end of search */
120 if (loc
< iov
->iov_len
) {
128 /* Point at the end of valid data */
141 EXPORT_SYMBOL(cuio_copyback
);
142 EXPORT_SYMBOL(cuio_copydata
);
143 EXPORT_SYMBOL(cuio_getptr
);
147 skb_copy_bits_back(struct sk_buff
*skb
, int offset
, caddr_t cp
, int len
)
150 if (offset
< skb_headlen(skb
)) {
151 memcpy(skb
->data
+ offset
, cp
, min_t(int, skb_headlen(skb
), len
));
152 len
-= skb_headlen(skb
);
153 cp
+= skb_headlen(skb
);
155 offset
-= skb_headlen(skb
);
156 for (i
= 0; len
> 0 && i
< skb_shinfo(skb
)->nr_frags
; i
++) {
157 if (offset
< skb_shinfo(skb
)->frags
[i
].size
) {
158 memcpy(page_address(skb_shinfo(skb
)->frags
[i
].page
) +
159 skb_shinfo(skb
)->frags
[i
].page_offset
,
160 cp
, min_t(int, skb_shinfo(skb
)->frags
[i
].size
, len
));
161 len
-= skb_shinfo(skb
)->frags
[i
].size
;
162 cp
+= skb_shinfo(skb
)->frags
[i
].size
;
164 offset
-= skb_shinfo(skb
)->frags
[i
].size
;
169 crypto_copyback(int flags
, caddr_t buf
, int off
, int size
, caddr_t in
)
172 if ((flags
& CRYPTO_F_SKBUF
) != 0)
173 skb_copy_bits_back((struct sk_buff
*)buf
, off
, in
, size
);
174 else if ((flags
& CRYPTO_F_IOV
) != 0)
175 cuio_copyback((struct uio
*)buf
, off
, size
, in
);
177 bcopy(in
, buf
+ off
, size
);
181 crypto_copydata(int flags
, caddr_t buf
, int off
, int size
, caddr_t out
)
184 if ((flags
& CRYPTO_F_SKBUF
) != 0)
185 skb_copy_bits((struct sk_buff
*)buf
, off
, out
, size
);
186 else if ((flags
& CRYPTO_F_IOV
) != 0)
187 cuio_copydata((struct uio
*)buf
, off
, size
, out
);
189 bcopy(buf
+ off
, out
, size
);
193 crypto_apply(int flags
, caddr_t buf
, int off
, int len
,
194 int (*f
)(void *, void *, u_int
), void *arg
)
199 if ((flags
& CRYPTO_F_SKBUF
) != 0)
200 error
= XXXXXX((struct mbuf
*)buf
, off
, len
, f
, arg
);
201 else if ((flags
& CRYPTO_F_IOV
) != 0)
202 error
= cuio_apply((struct uio
*)buf
, off
, len
, f
, arg
);
204 error
= (*f
)(arg
, buf
+ off
, len
);
207 KASSERT(0, ("crypto_apply not implemented!\n"));
212 EXPORT_SYMBOL(crypto_copyback
);
213 EXPORT_SYMBOL(crypto_copydata
);
214 EXPORT_SYMBOL(crypto_apply
);
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