1 /* $OpenBSD: criov.c,v 1.9 2002/01/29 15:48:29 jason Exp $ */
4 * Copyright (c) 1999 Theo de Raadt
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/systm.h>
36 #include <sys/errno.h>
37 #include <sys/malloc.h>
38 #include <sys/kernel.h>
42 #include <opencrypto/cryptodev.h>
45 * This macro is only for avoiding code duplication, as we need to skip
46 * given number of bytes in the same way in three functions below.
48 #define CUIO_SKIP() do { \
49 KASSERT(off >= 0, ("%s: off %d < 0", __func__, off)); \
50 KASSERT(len >= 0, ("%s: len %d < 0", __func__, len)); \
52 KASSERT(iol >= 0, ("%s: empty in skip", __func__)); \
53 if (off < iov->iov_len) \
55 off -= iov->iov_len; \
62 cuio_copydata(struct uio* uio, int off, int len, caddr_t cp)
64 struct iovec *iov = uio->uio_iov;
65 int iol = uio->uio_iovcnt;
70 KASSERT(iol >= 0, ("%s: empty", __func__));
71 count = min(iov->iov_len - off, len);
72 bcopy(((caddr_t)iov->iov_base) + off, cp, count);
82 cuio_copyback(struct uio* uio, int off, int len, c_caddr_t cp)
84 struct iovec *iov = uio->uio_iov;
85 int iol = uio->uio_iovcnt;
90 KASSERT(iol >= 0, ("%s: empty", __func__));
91 count = min(iov->iov_len - off, len);
92 bcopy(cp, ((caddr_t)iov->iov_base) + off, count);
102 * Return the index and offset of location in iovec list.
105 cuio_getptr(struct uio *uio, int loc, int *off)
110 while (loc >= 0 && ind < uio->uio_iovcnt) {
111 len = uio->uio_iov[ind].iov_len;
120 if (ind > 0 && loc == 0) {
122 *off = uio->uio_iov[ind].iov_len;
130 * Apply function f to the data in an iovec list starting "off" bytes from
131 * the beginning, continuing for "len" bytes.
134 cuio_apply(struct uio *uio, int off, int len, int (*f)(void *, void *, u_int),
137 struct iovec *iov = uio->uio_iov;
138 int iol = uio->uio_iovcnt;
144 KASSERT(iol >= 0, ("%s: empty", __func__));
145 count = min(iov->iov_len - off, len);
146 rval = (*f)(arg, ((caddr_t)iov->iov_base) + off, count);
158 crypto_copyback(int flags, caddr_t buf, int off, int size, c_caddr_t in)
161 if ((flags & CRYPTO_F_IMBUF) != 0)
162 m_copyback((struct mbuf *)buf, off, size, in);
163 else if ((flags & CRYPTO_F_IOV) != 0)
164 cuio_copyback((struct uio *)buf, off, size, in);
166 bcopy(in, buf + off, size);
170 crypto_copydata(int flags, caddr_t buf, int off, int size, caddr_t out)
173 if ((flags & CRYPTO_F_IMBUF) != 0)
174 m_copydata((struct mbuf *)buf, off, size, out);
175 else if ((flags & CRYPTO_F_IOV) != 0)
176 cuio_copydata((struct uio *)buf, off, size, out);
178 bcopy(buf + off, out, size);
182 crypto_apply(int flags, caddr_t buf, int off, int len,
183 int (*f)(void *, void *, u_int), void *arg)
187 if ((flags & CRYPTO_F_IMBUF) != 0)
188 error = m_apply((struct mbuf *)buf, off, len, f, arg);
189 else if ((flags & CRYPTO_F_IOV) != 0)
190 error = cuio_apply((struct uio *)buf, off, len, f, arg);
192 error = (*f)(arg, buf + off, len);
197 crypto_mbuftoiov(struct mbuf *mbuf, struct iovec **iovptr, int *cnt,
201 struct mbuf *m, *mtmp;
213 /* we need to allocate a larger array */
216 while ((mtmp = mtmp->m_next) != NULL)
218 iov = malloc(sizeof *iov * (i + j), M_CRYPTO_DATA,
224 memcpy(iov, *iovptr, sizeof *iov * i);
227 iov[i].iov_base = m->m_data;
228 iov[i].iov_len = m->m_len;
235 KASSERT(*cnt == i, ("did not allocate correct amount: %d != %d",