From: Giovanni Cabiddu Subject: [PATCH v3 2/8] crypto: add driver-side scomp interface Date: Wed, 24 Feb 2016 17:51:44 +0000 Message-ID: <1456336310-3737-3-git-send-email-giovanni.cabiddu@intel.com> References: <20160216195717.GA4207@gondor.apana.org.au> <1456336310-3737-1-git-send-email-giovanni.cabiddu@intel.com> Cc: linux-crypto@vger.kernel.org, Giovanni Cabiddu To: herbert@gondor.apana.org.au Return-path: Received: from mga09.intel.com ([134.134.136.24]:62903 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752126AbcBXRwj (ORCPT ); Wed, 24 Feb 2016 12:52:39 -0500 In-Reply-To: <1456336310-3737-1-git-send-email-giovanni.cabiddu@intel.com> Sender: linux-crypto-owner@vger.kernel.org List-ID: Add a synchronous back-end (scomp) to acomp. This allows to easily expose the already present compression algorithms in LKCF via acomp. Signed-off-by: Giovanni Cabiddu --- crypto/Makefile | 1 + crypto/acompress.c | 75 ++++++++++- crypto/scompress.c | 262 +++++++++++++++++++++++++++++++++++ include/crypto/acompress.h | 65 +++------ include/crypto/internal/acompress.h | 42 ++++++ include/crypto/internal/scompress.h | 138 ++++++++++++++++++ include/linux/crypto.h | 9 +- 7 files changed, 543 insertions(+), 49 deletions(-) create mode 100644 crypto/scompress.c create mode 100644 include/crypto/internal/scompress.h diff --git a/crypto/Makefile b/crypto/Makefile index e817b38..fc8fcfe 100644 --- a/crypto/Makefile +++ b/crypto/Makefile @@ -32,6 +32,7 @@ obj-$(CONFIG_CRYPTO_HASH2) += crypto_hash.o obj-$(CONFIG_CRYPTO_AKCIPHER2) += akcipher.o obj-$(CONFIG_CRYPTO_ACOMP2) += acompress.o +obj-$(CONFIG_CRYPTO_ACOMP2) += scompress.o $(obj)/rsapubkey-asn1.o: $(obj)/rsapubkey-asn1.c $(obj)/rsapubkey-asn1.h $(obj)/rsaprivkey-asn1.o: $(obj)/rsaprivkey-asn1.c $(obj)/rsaprivkey-asn1.h diff --git a/crypto/acompress.c b/crypto/acompress.c index f24fef3..2bd9c95 100644 --- a/crypto/acompress.c +++ b/crypto/acompress.c @@ -22,8 +22,11 @@ #include #include #include +#include #include "internal.h" +static const struct crypto_type crypto_acomp_type; + #ifdef CONFIG_NET static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg) { @@ -67,6 +70,14 @@ static int crypto_acomp_init_tfm(struct crypto_tfm *tfm) struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm); struct acomp_alg *alg = crypto_acomp_alg(acomp); + if (tfm->__crt_alg->cra_type != &crypto_acomp_type) + return crypto_init_scomp_ops_async(tfm); + + acomp->compress = alg->compress; + acomp->decompress = alg->decompress; + acomp->comp_reqsize = alg->comp_reqsize; + acomp->decomp_reqsize = alg->decomp_reqsize; + if (alg->exit) acomp->base.exit = crypto_acomp_exit_tfm; @@ -76,15 +87,22 @@ static int crypto_acomp_init_tfm(struct crypto_tfm *tfm) return 0; } +unsigned int crypto_acomp_extsize(struct crypto_alg *alg) +{ + if (alg->cra_type == &crypto_acomp_type) + return crypto_alg_extsize(alg); + return sizeof(struct crypto_scomp *); +} + static const struct crypto_type crypto_acomp_type = { - .extsize = crypto_alg_extsize, + .extsize = crypto_acomp_extsize, .init_tfm = crypto_acomp_init_tfm, #ifdef CONFIG_PROC_FS .show = crypto_acomp_show, #endif .report = crypto_acomp_report, .maskclear = ~CRYPTO_ALG_TYPE_MASK, - .maskset = CRYPTO_ALG_TYPE_MASK, + .maskset = CRYPTO_ALG_TYPE_ACOMPRESS_MASK, .type = CRYPTO_ALG_TYPE_ACOMPRESS, .tfmsize = offsetof(struct crypto_acomp, base), }; @@ -96,6 +114,59 @@ struct crypto_acomp *crypto_alloc_acomp(const char *alg_name, u32 type, } EXPORT_SYMBOL_GPL(crypto_alloc_acomp); +struct acomp_req *acomp_compression_request_alloc(struct crypto_acomp *acomp, + gfp_t gfp) +{ + struct crypto_tfm *tfm = crypto_acomp_tfm(acomp); + struct acomp_req *req; + + req = __acomp_compression_request_alloc(acomp, gfp); + if (req && (tfm->__crt_alg->cra_type != &crypto_acomp_type)) + return crypto_acomp_scomp_alloc_ctx(req, 1); + + return req; +} +EXPORT_SYMBOL_GPL(acomp_compression_request_alloc); + +struct acomp_req *acomp_decompression_request_alloc(struct crypto_acomp *acomp, + gfp_t gfp) +{ + struct crypto_tfm *tfm = crypto_acomp_tfm(acomp); + struct acomp_req *req; + + req = __acomp_decompression_request_alloc(acomp, gfp); + if (req && (tfm->__crt_alg->cra_type != &crypto_acomp_type)) + return crypto_acomp_scomp_alloc_ctx(req, 0); + + return req; +} +EXPORT_SYMBOL_GPL(acomp_decompression_request_alloc); + +struct acomp_req *acomp_request_alloc(struct crypto_acomp *acomp, gfp_t gfp) +{ + struct crypto_tfm *tfm = crypto_acomp_tfm(acomp); + struct acomp_req *req; + + req = __acomp_request_alloc(acomp, gfp); + if (req && (tfm->__crt_alg->cra_type != &crypto_acomp_type)) + return crypto_acomp_scomp_alloc_ctx(req, 1); + + return req; +} +EXPORT_SYMBOL_GPL(acomp_request_alloc); + +void acomp_request_free(struct acomp_req *req) +{ + struct crypto_acomp *acomp = crypto_acomp_reqtfm(req); + struct crypto_tfm *tfm = crypto_acomp_tfm(acomp); + + if (tfm->__crt_alg->cra_type != &crypto_acomp_type) + crypto_acomp_scomp_free_ctx(req); + + __acomp_request_free(req); +} +EXPORT_SYMBOL_GPL(acomp_request_free); + int crypto_register_acomp(struct acomp_alg *alg) { struct crypto_alg *base = &alg->base; diff --git a/crypto/scompress.c b/crypto/scompress.c new file mode 100644 index 0000000..da5855d --- /dev/null +++ b/crypto/scompress.c @@ -0,0 +1,262 @@ +/* + * Synchronous Compression operations + * + * Copyright 2015 LG Electronics Inc. + * Copyright (c) 2016, Intel Corporation + * Author: Giovanni Cabiddu + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "internal.h" + +static const struct crypto_type crypto_scomp_type; + +#ifdef CONFIG_NET +static int crypto_scomp_report(struct sk_buff *skb, struct crypto_alg *alg) +{ + struct crypto_report_comp rscomp; + + strncpy(rscomp.type, "scomp", sizeof(rscomp.type)); + + if (nla_put(skb, CRYPTOCFGA_REPORT_COMPRESS, + sizeof(struct crypto_report_comp), &rscomp)) + goto nla_put_failure; + return 0; + +nla_put_failure: + return -EMSGSIZE; +} +#else +static int crypto_scomp_report(struct sk_buff *skb, struct crypto_alg *alg) +{ + return -ENOSYS; +} +#endif + +static void crypto_scomp_show(struct seq_file *m, struct crypto_alg *alg) + __attribute__ ((unused)); + +static void crypto_scomp_show(struct seq_file *m, struct crypto_alg *alg) +{ + seq_puts(m, "type : scomp\n"); +} + +static int crypto_scomp_init_tfm(struct crypto_tfm *tfm) +{ + return 0; +} + +static void *scomp_map(struct scatterlist *sg, unsigned int len, + gfp_t gfp_flags) +{ + void *buf; + + if (sg_is_last(sg)) + return kmap_atomic(sg_page(sg)) + sg->offset; + + buf = kmalloc(len, gfp_flags); + if (!buf) + return NULL; + + scatterwalk_map_and_copy(buf, sg, 0, len, 0); + + return buf; +} + +static void scomp_unmap(struct scatterlist *sg, void *buf, unsigned int len) +{ + if (!buf) + return; + + if (sg_is_last(sg)) { + kunmap_atomic(buf); + return; + } + + scatterwalk_map_and_copy(buf, sg, 0, len, 1); + kfree(buf); +} + +static int scomp_acomp_comp_decomp(struct acomp_req *req, int comp_dir) +{ + struct crypto_acomp *tfm = crypto_acomp_reqtfm(req); + void **tfm_ctx = acomp_tfm_ctx(tfm); + struct crypto_scomp *scomp = *tfm_ctx; + gfp_t gfp_flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ? + GFP_KERNEL : GFP_ATOMIC; + void **ctx = acomp_request_ctx(req); + unsigned int slen = req->slen; + unsigned int dlen = req->dlen; + u8 *src; + u8 *dst; + int ret; + + src = scomp_map(req->src, slen, gfp_flags); + if (!src) { + ret = -ENOMEM; + goto out; + } + + dst = scomp_map(req->dst, dlen, gfp_flags); + if (!dst) { + ret = -ENOMEM; + goto out; + } + + if (comp_dir) + ret = crypto_scomp_compress(scomp, src, slen, dst, &dlen, *ctx); + else + ret = crypto_scomp_decompress(scomp, src, slen, dst, &dlen, + crypto_scomp_decomp_noctx(scomp) ? + NULL : *ctx); +out: + if (ret < 0) { + req->consumed = 0; + req->produced = 0; + } else { + req->consumed = slen; + req->produced = dlen; + } + scomp_unmap(req->src, src, 0); + scomp_unmap(req->dst, dst, (ret < 0) ? 0 : dlen); + + return ret; +} + +static int scomp_acomp_compress(struct acomp_req *req) +{ + return scomp_acomp_comp_decomp(req, 1); +} + +static int scomp_acomp_decompress(struct acomp_req *req) +{ + return scomp_acomp_comp_decomp(req, 0); +} + +static void crypto_exit_scomp_ops_async(struct crypto_tfm *tfm) +{ + struct crypto_scomp **ctx = crypto_tfm_ctx(tfm); + + crypto_free_scomp(*ctx); +} + +int crypto_init_scomp_ops_async(struct crypto_tfm *tfm) +{ + struct crypto_alg *calg = tfm->__crt_alg; + struct crypto_acomp *crt = __crypto_acomp_tfm(tfm); + struct crypto_scomp **ctx = crypto_tfm_ctx(tfm); + struct crypto_scomp *scomp; + + if (!crypto_mod_get(calg)) + return -EAGAIN; + + scomp = crypto_create_tfm(calg, &crypto_scomp_type); + if (IS_ERR(scomp)) { + crypto_mod_put(calg); + return PTR_ERR(scomp); + } + + *ctx = scomp; + tfm->exit = crypto_exit_scomp_ops_async; + + crt->compress = scomp_acomp_compress; + crt->decompress = scomp_acomp_decompress; + crt->comp_reqsize = sizeof(void *); + crt->decomp_reqsize = sizeof(void *); + + return 0; +} + +struct acomp_req *crypto_acomp_scomp_alloc_ctx(struct acomp_req *req, int dir) +{ + struct crypto_acomp *acomp = crypto_acomp_reqtfm(req); + struct crypto_tfm *tfm = crypto_acomp_tfm(acomp); + struct crypto_scomp **tfm_ctx = crypto_tfm_ctx(tfm); + struct crypto_scomp *scomp = *tfm_ctx; + void *ctx; + + if (!dir && crypto_scomp_decomp_noctx(scomp)) { + *req->__ctx = NULL; + return req; + } + + ctx = crypto_scomp_alloc_ctx(scomp); + if (IS_ERR(ctx)) { + kfree(req); + return NULL; + } + + *req->__ctx = ctx; + + return req; +} + +void crypto_acomp_scomp_free_ctx(struct acomp_req *req) +{ + struct crypto_acomp *acomp = crypto_acomp_reqtfm(req); + struct crypto_tfm *tfm = crypto_acomp_tfm(acomp); + struct crypto_scomp **tfm_ctx = crypto_tfm_ctx(tfm); + struct crypto_scomp *scomp = *tfm_ctx; + void *ctx = *req->__ctx; + + if (ctx) + crypto_scomp_free_ctx(scomp, ctx); +} + +static const struct crypto_type crypto_scomp_type = { + .extsize = crypto_alg_extsize, + .init_tfm = crypto_scomp_init_tfm, +#ifdef CONFIG_PROC_FS + .show = crypto_scomp_show, +#endif + .report = crypto_scomp_report, + .maskclear = ~CRYPTO_ALG_TYPE_MASK, + .maskset = CRYPTO_ALG_TYPE_MASK, + .type = CRYPTO_ALG_TYPE_SCOMPRESS, + .tfmsize = offsetof(struct crypto_scomp, base), +}; + +struct crypto_scomp *crypto_alloc_scomp(const char *alg_name, u32 type, + u32 mask) +{ + return crypto_alloc_tfm(alg_name, &crypto_scomp_type, type, mask); +} +EXPORT_SYMBOL_GPL(crypto_alloc_scomp); + +int crypto_register_scomp(struct scomp_alg *alg) +{ + struct crypto_alg *base = &alg->base; + + base->cra_type = &crypto_scomp_type; + base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; + base->cra_flags |= CRYPTO_ALG_TYPE_SCOMPRESS; + + return crypto_register_alg(base); +} +EXPORT_SYMBOL_GPL(crypto_register_scomp); + +int crypto_unregister_scomp(struct scomp_alg *alg) +{ + return crypto_unregister_alg(&alg->base); +} +EXPORT_SYMBOL_GPL(crypto_unregister_scomp); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Synchronous compression type"); diff --git a/include/crypto/acompress.h b/include/crypto/acompress.h index 0ee5c9b..dfa391a 100644 --- a/include/crypto/acompress.h +++ b/include/crypto/acompress.h @@ -42,9 +42,17 @@ struct acomp_req { * struct crypto_acomp - user-instantiated objects which encapsulate * algorithms and core processing logic * + * @compress: Function performs a compress operation + * @decompress: Function performs a de-compress operation + * @comp_reqsize: Context size for compression requests + * @decomp_reqsize: Context size for decompression requests * @base: Common crypto API algorithm data structure */ struct crypto_acomp { + int (*compress)(struct acomp_req *req); + int (*decompress)(struct acomp_req *req); + unsigned int comp_reqsize; + unsigned int decomp_reqsize; struct crypto_tfm base; }; @@ -64,10 +72,9 @@ struct crypto_acomp { * @exit: Deinitialize the cryptographic transformation object. This is a * counterpart to @init, used to remove various changes set in * @init. - * * @comp_reqsize: Context size for compression requests * @decomp_reqsize: Context size for decompression requests - * @base: Common crypto API algorithm data structure + * @base: Common crypto API algorithm data structure */ struct acomp_alg { int (*compress)(struct acomp_req *req); @@ -126,13 +133,13 @@ static inline struct acomp_alg *crypto_acomp_alg(struct crypto_acomp *tfm) static inline unsigned int crypto_acomp_compression_reqsize( struct crypto_acomp *tfm) { - return crypto_acomp_alg(tfm)->comp_reqsize; + return tfm->comp_reqsize; } static inline unsigned int crypto_acomp_decompression_reqsize( struct crypto_acomp *tfm) { - return crypto_acomp_alg(tfm)->decomp_reqsize; + return tfm->decomp_reqsize; } static inline unsigned int crypto_acomp_reqsize(struct crypto_acomp *tfm) @@ -172,18 +179,8 @@ static inline void crypto_free_acomp(struct crypto_acomp *tfm) * * Return: allocated handle in case of success or NULL in case of an error. */ -static inline struct acomp_req *acomp_compression_request_alloc( - struct crypto_acomp *tfm, gfp_t gfp) -{ - struct acomp_req *req; - - req = kzalloc(sizeof(*req) + - crypto_acomp_compression_reqsize(tfm), gfp); - if (likely(req)) - acomp_request_set_tfm(req, tfm); - - return req; -} +struct acomp_req *acomp_compression_request_alloc(struct crypto_acomp *tfm, + gfp_t gfp); /** * acomp_decompression_request_alloc() -- allocates async decompression request @@ -193,18 +190,8 @@ static inline struct acomp_req *acomp_compression_request_alloc( * * Return: allocated handle in case of success or NULL in case of an error. */ -static inline struct acomp_req *acomp_decompression_request_alloc( - struct crypto_acomp *tfm, gfp_t gfp) -{ - struct acomp_req *req; - - req = kzalloc(sizeof(*req) + - crypto_acomp_decompression_reqsize(tfm), gfp); - if (likely(req)) - acomp_request_set_tfm(req, tfm); - - return req; -} +struct acomp_req *acomp_decompression_request_alloc(struct crypto_acomp *tfm, + gfp_t gfp); /** * acomp_request_alloc() -- allocates asynchronous (de)compression request @@ -214,26 +201,14 @@ static inline struct acomp_req *acomp_decompression_request_alloc( * * Return: allocated handle in case of success or NULL in case of an error. */ -static inline struct acomp_req *acomp_request_alloc(struct crypto_acomp *tfm, - gfp_t gfp) -{ - struct acomp_req *req; - - req = kzalloc(sizeof(*req) + crypto_acomp_reqsize(tfm), gfp); - if (likely(req)) - acomp_request_set_tfm(req, tfm); - return req; -} +struct acomp_req *acomp_request_alloc(struct crypto_acomp *tfm, gfp_t gfp); /** * acomp_request_free() -- zeroize and free asynchronous compress request * * @req: request to free */ -static inline void acomp_request_free(struct acomp_req *req) -{ - kfree(req); -} +void acomp_request_free(struct acomp_req *req); /** * acomp_request_set_callback() -- Sets an asynchronous callback @@ -293,9 +268,8 @@ static inline void acomp_request_set_params(struct acomp_req *req, static inline int crypto_acomp_compress(struct acomp_req *req) { struct crypto_acomp *tfm = crypto_acomp_reqtfm(req); - struct acomp_alg *alg = crypto_acomp_alg(tfm); - return alg->compress(req); + return tfm->compress(req); } /** @@ -310,9 +284,8 @@ static inline int crypto_acomp_compress(struct acomp_req *req) static inline int crypto_acomp_decompress(struct acomp_req *req) { struct crypto_acomp *tfm = crypto_acomp_reqtfm(req); - struct acomp_alg *alg = crypto_acomp_alg(tfm); - return alg->decompress(req); + return tfm->decompress(req); } #endif diff --git a/include/crypto/internal/acompress.h b/include/crypto/internal/acompress.h index 2061532..e9822eb 100644 --- a/include/crypto/internal/acompress.h +++ b/include/crypto/internal/acompress.h @@ -39,6 +39,48 @@ static inline const char *acomp_alg_name(struct crypto_acomp *tfm) return crypto_acomp_tfm(tfm)->__crt_alg->cra_name; } +static inline struct acomp_req *__acomp_compression_request_alloc( + struct crypto_acomp *acomp, gfp_t gfp) +{ + struct acomp_req *req; + + req = kzalloc(sizeof(*req) + crypto_acomp_compression_reqsize(acomp), + gfp); + if (likely(req)) + acomp_request_set_tfm(req, acomp); + + return req; +} + +static inline struct acomp_req *__acomp_decompression_request_alloc( + struct crypto_acomp *acomp, gfp_t gfp) +{ + struct acomp_req *req; + + req = kzalloc(sizeof(*req) + crypto_acomp_decompression_reqsize(acomp), + gfp); + if (likely(req)) + acomp_request_set_tfm(req, acomp); + + return req; +} + +static inline struct acomp_req *__acomp_request_alloc(struct crypto_acomp *tfm, + gfp_t gfp) +{ + struct acomp_req *req; + + req = kzalloc(sizeof(*req) + crypto_acomp_reqsize(tfm), gfp); + if (likely(req)) + acomp_request_set_tfm(req, tfm); + return req; +} + +static inline void __acomp_request_free(struct acomp_req *req) +{ + kfree(req); +} + /** * crypto_register_acomp() -- Register asynchronous compression algorithm * diff --git a/include/crypto/internal/scompress.h b/include/crypto/internal/scompress.h new file mode 100644 index 0000000..0bb1b2c --- /dev/null +++ b/include/crypto/internal/scompress.h @@ -0,0 +1,138 @@ +/* + * Synchronous Compression operations + * + * Copyright 2015 LG Electronics Inc. + * Copyright (c) 2016, Intel Corporation + * Author: Giovanni Cabiddu + * + * 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_SCOMP_INT_H +#define _CRYPTO_SCOMP_INT_H +#include + +#define CRYPTO_SCOMP_DECOMP_NOCTX CRYPTO_ALG_PRIVATE + +struct crypto_scomp { + struct crypto_tfm base; +}; + +/** + * struct scomp_alg - synchronous compression algorithm + * + * @alloc_ctx: Function allocates algorithm specific context + * @free_ctx: Function frees context allocated with alloc_ctx + * @compress: Function performs a compress operation + * @decompress: Function performs a de-compress operation + * @init: Initialize the cryptographic transformation object. + * This function is used to initialize the cryptographic + * transformation object. This function is called only once at + * the instantiation time, right after the transformation context + * was allocated. In case the cryptographic hardware has some + * special requirements which need to be handled by software, this + * function shall check for the precise requirement of the + * transformation and put any software fallbacks in place. + * @exit: Deinitialize the cryptographic transformation object. This is a + * counterpart to @init, used to remove various changes set in + * @init. + * @base: Common crypto API algorithm data structure + */ +struct scomp_alg { + void *(*alloc_ctx)(struct crypto_scomp *tfm); + void (*free_ctx)(struct crypto_scomp *tfm, void *ctx); + int (*compress)(struct crypto_scomp *tfm, const u8 *src, + unsigned int slen, u8 *dst, unsigned int *dlen, + void *ctx); + int (*decompress)(struct crypto_scomp *tfm, const u8 *src, + unsigned int slen, u8 *dst, unsigned int *dlen, + void *ctx); + struct crypto_alg base; +}; + +static inline struct scomp_alg *__crypto_scomp_alg(struct crypto_alg *alg) +{ + return container_of(alg, struct scomp_alg, base); +} + +static inline struct crypto_tfm *crypto_scomp_tfm(struct crypto_scomp *tfm) +{ + return &tfm->base; +} + +static inline void crypto_free_scomp(struct crypto_scomp *tfm) +{ + crypto_destroy_tfm(tfm, crypto_scomp_tfm(tfm)); +} + +static inline struct scomp_alg *crypto_scomp_alg(struct crypto_scomp *tfm) +{ + return __crypto_scomp_alg(crypto_scomp_tfm(tfm)->__crt_alg); +} + +static inline void *crypto_scomp_alloc_ctx(struct crypto_scomp *tfm) +{ + return crypto_scomp_alg(tfm)->alloc_ctx(tfm); +} + +static inline void crypto_scomp_free_ctx(struct crypto_scomp *tfm, + void *ctx) +{ + return crypto_scomp_alg(tfm)->free_ctx(tfm, ctx); +} + +static inline int crypto_scomp_compress(struct crypto_scomp *tfm, + const u8 *src, unsigned int slen, + u8 *dst, unsigned int *dlen, void *ctx) +{ + return crypto_scomp_alg(tfm)->compress(tfm, src, slen, dst, dlen, ctx); +} + +static inline int crypto_scomp_decompress(struct crypto_scomp *tfm, + const u8 *src, unsigned int slen, + u8 *dst, unsigned int *dlen, + void *ctx) +{ + return crypto_scomp_alg(tfm)->decompress(tfm, src, slen, dst, dlen, + ctx); +} + +static inline bool crypto_scomp_decomp_noctx(struct crypto_scomp *tfm) +{ + struct crypto_alg *alg = crypto_scomp_tfm(tfm)->__crt_alg; + + return alg->cra_flags & CRYPTO_SCOMP_DECOMP_NOCTX; +} + +int crypto_init_scomp_ops_async(struct crypto_tfm *tfm); +struct acomp_req *crypto_acomp_scomp_alloc_ctx(struct acomp_req *req, int dir); +void crypto_acomp_scomp_free_ctx(struct acomp_req *req); + +/** + * crypto_register_scomp() -- Register synchronous compression algorithm + * + * Function registers an implementation of a synchronous + * compression algorithm + * + * @alg: algorithm definition + * + * Return: zero on success; error code in case of error + */ +int crypto_register_scomp(struct scomp_alg *alg); + +/** + * crypto_unregister_scomp() -- Unregister synchronous compression algorithm + * + * Function unregisters an implementation of a synchronous + * compression algorithm + * + * @alg: algorithm definition + * + * Return: zero on success; error code in case of error + */ +int crypto_unregister_scomp(struct scomp_alg *alg); + +#endif diff --git a/include/linux/crypto.h b/include/linux/crypto.h index f9d72bd..72ee777 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -54,11 +54,13 @@ #define CRYPTO_ALG_TYPE_AHASH 0x0000000a #define CRYPTO_ALG_TYPE_RNG 0x0000000c #define CRYPTO_ALG_TYPE_AKCIPHER 0x0000000d -#define CRYPTO_ALG_TYPE_ACOMPRESS 0x0000000e +#define CRYPTO_ALG_TYPE_SCOMPRESS 0x0000000e +#define CRYPTO_ALG_TYPE_ACOMPRESS 0x0000000f #define CRYPTO_ALG_TYPE_HASH_MASK 0x0000000e #define CRYPTO_ALG_TYPE_AHASH_MASK 0x0000000c #define CRYPTO_ALG_TYPE_BLKCIPHER_MASK 0x0000000c +#define CRYPTO_ALG_TYPE_ACOMPRESS_MASK 0x0000000e #define CRYPTO_ALG_LARVAL 0x00000010 #define CRYPTO_ALG_DEAD 0x00000020 @@ -102,6 +104,11 @@ #define CRYPTO_ALG_INTERNAL 0x00002000 /* + * Reserved as algorithm specific field + */ +#define CRYPTO_ALG_PRIVATE 0x00004000 + +/* * Transform masks and values (for crt_flags). */ #define CRYPTO_TFM_REQ_MASK 0x000fff00 -- 1.7.4.1