--- /dev/null
+/* $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);
+
projects / openwrt / svn-archive / archive.git / blobdiff