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);