linux/crypto/compress.c
Herbert Xu c7fc05992a [CRYPTO] api: Added cra_init/cra_exit
This patch adds the hooks cra_init/cra_exit which are called during a tfm's
construction and destruction respectively.  This will be used by the instances
to allocate child tfm's.

For now this lets us get rid of the coa_init/coa_exit functions which are
used for exactly that purpose (unlike the dia_init function which is called
for each transaction).

In fact the coa_exit path is currently buggy as it may get called twice
when an error is encountered during initialisation.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2006-06-26 17:34:40 +10:00

54 lines
1.5 KiB
C

/*
* Cryptographic API.
*
* Compression operations.
*
* Copyright (c) 2002 James Morris <jmorris@intercode.com.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.
*
*/
#include <linux/types.h>
#include <linux/crypto.h>
#include <linux/errno.h>
#include <asm/scatterlist.h>
#include <linux/string.h>
#include "internal.h"
static int crypto_compress(struct crypto_tfm *tfm,
const u8 *src, unsigned int slen,
u8 *dst, unsigned int *dlen)
{
return tfm->__crt_alg->cra_compress.coa_compress(tfm, src, slen, dst,
dlen);
}
static int crypto_decompress(struct crypto_tfm *tfm,
const u8 *src, unsigned int slen,
u8 *dst, unsigned int *dlen)
{
return tfm->__crt_alg->cra_compress.coa_decompress(tfm, src, slen, dst,
dlen);
}
int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags)
{
return flags ? -EINVAL : 0;
}
int crypto_init_compress_ops(struct crypto_tfm *tfm)
{
struct compress_tfm *ops = &tfm->crt_compress;
ops->cot_compress = crypto_compress;
ops->cot_decompress = crypto_decompress;
return 0;
}
void crypto_exit_compress_ops(struct crypto_tfm *tfm)
{
}