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internal	[ DIR ]	drwxr-xr-x
ablk_helper.h	773 B	-rw-r--r--
acompress.h	7.83 KB	-rw-r--r--
aead.h	18.03 KB	-rw-r--r--
aes.h	1.03 KB	-rw-r--r--
akcipher.h	11.63 KB	-rw-r--r--
algapi.h	11.12 KB	-rw-r--r--
authenc.h	845 B	-rw-r--r--
b128ops.h	2.41 KB	-rw-r--r--
blowfish.h	415 B	-rw-r--r--
cast5.h	590 B	-rw-r--r--
cast6.h	636 B	-rw-r--r--
cast_common.h	232 B	-rw-r--r--
cbc.h	3.48 KB	-rw-r--r--
chacha20.h	640 B	-rw-r--r--
cryptd.h	2.5 KB	-rw-r--r--
crypto_wq.h	161 B	-rw-r--r--
ctr.h	524 B	-rw-r--r--
des.h	542 B	-rw-r--r--
dh.h	2.62 KB	-rw-r--r--
drbg.h	8.96 KB	-rw-r--r--
ecdh.h	2.67 KB	-rw-r--r--
engine.h	4 KB	-rw-r--r--
gcm.h	140 B	-rw-r--r--
gf128mul.h	9.41 KB	-rw-r--r--
ghash.h	381 B	-rw-r--r--
hash.h	31.34 KB	-rw-r--r--
hash_info.h	1.13 KB	-rw-r--r--
hmac.h	173 B	-rw-r--r--
if_alg.h	7.01 KB	-rw-r--r--
kpp.h	9.62 KB	-rw-r--r--
lrw.h	1.22 KB	-rw-r--r--
mcryptd.h	2.37 KB	-rw-r--r--
md5.h	497 B	-rw-r--r--
null.h	569 B	-rw-r--r--
padlock.h	649 B	-rw-r--r--
pcrypt.h	1.4 KB	-rw-r--r--
pkcs7.h	1.21 KB	-rw-r--r--
poly1305.h	920 B	-rw-r--r--
public_key.h	2.08 KB	-rw-r--r--
rng.h	6.59 KB	-rw-r--r--
scatterwalk.h	3.67 KB	-rw-r--r--
serpent.h	712 B	-rw-r--r--
sha.h	2.88 KB	-rw-r--r--
sha1_base.h	2.47 KB	-rw-r--r--
sha256_base.h	3.03 KB	-rw-r--r--
sha3.h	704 B	-rw-r--r--
sha512_base.h	3.19 KB	-rw-r--r--
skcipher.h	20.63 KB	-rw-r--r--
sm3.h	833 B	-rw-r--r--
sm3_base.h	2.95 KB	-rw-r--r--
twofish.h	755 B	-rw-r--r--
xts.h	1.81 KB	-rw-r--r--

Code Editor : scatterwalk.h

/*
 * Cryptographic scatter and gather helpers.
 *
 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
 * Copyright (c) 2002 Adam J. Richter <adam@yggdrasil.com>
 * Copyright (c) 2004 Jean-Luc Cooke <jlcooke@certainkey.com>
 * Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 */

#ifndef _CRYPTO_SCATTERWALK_H
#define _CRYPTO_SCATTERWALK_H

#include <crypto/algapi.h>
#include <linux/highmem.h>
#include <linux/kernel.h>
#include <linux/scatterlist.h>

static inline void scatterwalk_crypto_chain(struct scatterlist *head,
					    struct scatterlist *sg,
					    int chain, int num)
{
	if (chain) {
		head->length += sg->length;
		sg = sg_next(sg);
	}

if (sg)
		sg_chain(head, num, sg);
	else
		sg_mark_end(head);
}

static inline unsigned long scatterwalk_samebuf(struct scatter_walk *walk_in,
						struct scatter_walk *walk_out)
{
	return !(((sg_page(walk_in->sg) - sg_page(walk_out->sg)) << PAGE_SHIFT) +
		 (int)(walk_in->offset - walk_out->offset));
}

static inline unsigned int scatterwalk_pagelen(struct scatter_walk *walk)
{
	unsigned int len = walk->sg->offset + walk->sg->length - walk->offset;
	unsigned int len_this_page = offset_in_page(~walk->offset) + 1;
	return len_this_page > len ? len : len_this_page;
}

static inline unsigned int scatterwalk_clamp(struct scatter_walk *walk,
					     unsigned int nbytes)
{
	unsigned int len_this_page = scatterwalk_pagelen(walk);
	return nbytes > len_this_page ? len_this_page : nbytes;
}

static inline void scatterwalk_advance(struct scatter_walk *walk,
				       unsigned int nbytes)
{
	walk->offset += nbytes;
}

static inline unsigned int scatterwalk_aligned(struct scatter_walk *walk,
					       unsigned int alignmask)
{
	return !(walk->offset & alignmask);
}

static inline struct page *scatterwalk_page(struct scatter_walk *walk)
{
	return sg_page(walk->sg) + (walk->offset >> PAGE_SHIFT);
}

static inline void scatterwalk_unmap(void *vaddr)
{
	kunmap_atomic(vaddr);
}

static inline void scatterwalk_start(struct scatter_walk *walk,
				     struct scatterlist *sg)
{
	walk->sg = sg;
	walk->offset = sg->offset;
}

static inline void *scatterwalk_map(struct scatter_walk *walk)
{
	return kmap_atomic(scatterwalk_page(walk)) +
	       offset_in_page(walk->offset);
}

static inline void scatterwalk_pagedone(struct scatter_walk *walk, int out,
					unsigned int more)
{
	if (out) {
		struct page *page;

page = sg_page(walk->sg) + ((walk->offset - 1) >> PAGE_SHIFT);
		/* Test ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE first as
		 * PageSlab cannot be optimised away per se due to
		 * use of volatile pointer.
		 */
		if (ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE && !PageSlab(page))
			flush_dcache_page(page);
	}

if (more && walk->offset >= walk->sg->offset + walk->sg->length)
		scatterwalk_start(walk, sg_next(walk->sg));
}

static inline void scatterwalk_done(struct scatter_walk *walk, int out,
				    int more)
{
	if (!more || walk->offset >= walk->sg->offset + walk->sg->length ||
	    !(walk->offset & (PAGE_SIZE - 1)))
		scatterwalk_pagedone(walk, out, more);
}

void scatterwalk_copychunks(void *buf, struct scatter_walk *walk,
			    size_t nbytes, int out);
void *scatterwalk_map(struct scatter_walk *walk);

void scatterwalk_map_and_copy(void *buf, struct scatterlist *sg,
			      unsigned int start, unsigned int nbytes, int out);

struct scatterlist *scatterwalk_ffwd(struct scatterlist dst[2],
				     struct scatterlist *src,
				     unsigned int len);

#endif  /* _CRYPTO_SCATTERWALK_H */

${this.title}

Code Editor : scatterwalk.h