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linux-next/include/crypto/compress.h
David Howells f94a359763 crypto: pcomp - Constify (de)compression parameters
In testmgr, struct pcomp_testvec takes a non-const 'params' field, which is
pointed to a const deflate_comp_params or deflate_decomp_params object.  With
gcc-5 this incurs the following warnings:

In file included from ../crypto/testmgr.c:44:0:
../crypto/testmgr.h:28736:13: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-array-qualifiers]
   .params = &deflate_comp_params,
             ^
../crypto/testmgr.h:28748:13: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-array-qualifiers]
   .params = &deflate_comp_params,
             ^
../crypto/testmgr.h:28776:13: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-array-qualifiers]
   .params = &deflate_decomp_params,
             ^
../crypto/testmgr.h:28800:13: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-array-qualifiers]
   .params = &deflate_decomp_params,
             ^

Fix this by making the parameters pointer const and constifying the things
that use it.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-05-01 11:16:37 +08:00

146 lines
4.0 KiB
C

/*
* Compress: Compression algorithms under the cryptographic API.
*
* Copyright 2008 Sony Corporation
*
* 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; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program.
* If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _CRYPTO_COMPRESS_H
#define _CRYPTO_COMPRESS_H
#include <linux/crypto.h>
struct comp_request {
const void *next_in; /* next input byte */
void *next_out; /* next output byte */
unsigned int avail_in; /* bytes available at next_in */
unsigned int avail_out; /* bytes available at next_out */
};
enum zlib_comp_params {
ZLIB_COMP_LEVEL = 1, /* e.g. Z_DEFAULT_COMPRESSION */
ZLIB_COMP_METHOD, /* e.g. Z_DEFLATED */
ZLIB_COMP_WINDOWBITS, /* e.g. MAX_WBITS */
ZLIB_COMP_MEMLEVEL, /* e.g. DEF_MEM_LEVEL */
ZLIB_COMP_STRATEGY, /* e.g. Z_DEFAULT_STRATEGY */
__ZLIB_COMP_MAX,
};
#define ZLIB_COMP_MAX (__ZLIB_COMP_MAX - 1)
enum zlib_decomp_params {
ZLIB_DECOMP_WINDOWBITS = 1, /* e.g. DEF_WBITS */
__ZLIB_DECOMP_MAX,
};
#define ZLIB_DECOMP_MAX (__ZLIB_DECOMP_MAX - 1)
struct crypto_pcomp {
struct crypto_tfm base;
};
struct pcomp_alg {
int (*compress_setup)(struct crypto_pcomp *tfm, const void *params,
unsigned int len);
int (*compress_init)(struct crypto_pcomp *tfm);
int (*compress_update)(struct crypto_pcomp *tfm,
struct comp_request *req);
int (*compress_final)(struct crypto_pcomp *tfm,
struct comp_request *req);
int (*decompress_setup)(struct crypto_pcomp *tfm, const void *params,
unsigned int len);
int (*decompress_init)(struct crypto_pcomp *tfm);
int (*decompress_update)(struct crypto_pcomp *tfm,
struct comp_request *req);
int (*decompress_final)(struct crypto_pcomp *tfm,
struct comp_request *req);
struct crypto_alg base;
};
extern struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type,
u32 mask);
static inline struct crypto_tfm *crypto_pcomp_tfm(struct crypto_pcomp *tfm)
{
return &tfm->base;
}
static inline void crypto_free_pcomp(struct crypto_pcomp *tfm)
{
crypto_destroy_tfm(tfm, crypto_pcomp_tfm(tfm));
}
static inline struct pcomp_alg *__crypto_pcomp_alg(struct crypto_alg *alg)
{
return container_of(alg, struct pcomp_alg, base);
}
static inline struct pcomp_alg *crypto_pcomp_alg(struct crypto_pcomp *tfm)
{
return __crypto_pcomp_alg(crypto_pcomp_tfm(tfm)->__crt_alg);
}
static inline int crypto_compress_setup(struct crypto_pcomp *tfm,
const void *params, unsigned int len)
{
return crypto_pcomp_alg(tfm)->compress_setup(tfm, params, len);
}
static inline int crypto_compress_init(struct crypto_pcomp *tfm)
{
return crypto_pcomp_alg(tfm)->compress_init(tfm);
}
static inline int crypto_compress_update(struct crypto_pcomp *tfm,
struct comp_request *req)
{
return crypto_pcomp_alg(tfm)->compress_update(tfm, req);
}
static inline int crypto_compress_final(struct crypto_pcomp *tfm,
struct comp_request *req)
{
return crypto_pcomp_alg(tfm)->compress_final(tfm, req);
}
static inline int crypto_decompress_setup(struct crypto_pcomp *tfm,
const void *params, unsigned int len)
{
return crypto_pcomp_alg(tfm)->decompress_setup(tfm, params, len);
}
static inline int crypto_decompress_init(struct crypto_pcomp *tfm)
{
return crypto_pcomp_alg(tfm)->decompress_init(tfm);
}
static inline int crypto_decompress_update(struct crypto_pcomp *tfm,
struct comp_request *req)
{
return crypto_pcomp_alg(tfm)->decompress_update(tfm, req);
}
static inline int crypto_decompress_final(struct crypto_pcomp *tfm,
struct comp_request *req)
{
return crypto_pcomp_alg(tfm)->decompress_final(tfm, req);
}
#endif /* _CRYPTO_COMPRESS_H */