/* * 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, 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, 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,					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,					  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 */