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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Asynchronous Compression operations4 *5 * Copyright (c) 2016, Intel Corporation6 * Authors: Weigang Li <weigang.li@intel.com>7 * Giovanni Cabiddu <giovanni.cabiddu@intel.com>8 */9 10#include <crypto/internal/acompress.h>11#include <linux/cryptouser.h>12#include <linux/errno.h>13#include <linux/kernel.h>14#include <linux/module.h>15#include <linux/seq_file.h>16#include <linux/slab.h>17#include <linux/string.h>18#include <net/netlink.h>19 20#include "compress.h"21 22struct crypto_scomp;23 24static const struct crypto_type crypto_acomp_type;25 26static inline struct acomp_alg *__crypto_acomp_alg(struct crypto_alg *alg)27{28 return container_of(alg, struct acomp_alg, calg.base);29}30 31static inline struct acomp_alg *crypto_acomp_alg(struct crypto_acomp *tfm)32{33 return __crypto_acomp_alg(crypto_acomp_tfm(tfm)->__crt_alg);34}35 36static int __maybe_unused crypto_acomp_report(37 struct sk_buff *skb, struct crypto_alg *alg)38{39 struct crypto_report_acomp racomp;40 41 memset(&racomp, 0, sizeof(racomp));42 43 strscpy(racomp.type, "acomp", sizeof(racomp.type));44 45 return nla_put(skb, CRYPTOCFGA_REPORT_ACOMP, sizeof(racomp), &racomp);46}47 48static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)49 __maybe_unused;50 51static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)52{53 seq_puts(m, "type : acomp\n");54}55 56static void crypto_acomp_exit_tfm(struct crypto_tfm *tfm)57{58 struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);59 struct acomp_alg *alg = crypto_acomp_alg(acomp);60 61 alg->exit(acomp);62}63 64static int crypto_acomp_init_tfm(struct crypto_tfm *tfm)65{66 struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);67 struct acomp_alg *alg = crypto_acomp_alg(acomp);68 69 if (tfm->__crt_alg->cra_type != &crypto_acomp_type)70 return crypto_init_scomp_ops_async(tfm);71 72 acomp->compress = alg->compress;73 acomp->decompress = alg->decompress;74 acomp->dst_free = alg->dst_free;75 acomp->reqsize = alg->reqsize;76 77 if (alg->exit)78 acomp->base.exit = crypto_acomp_exit_tfm;79 80 if (alg->init)81 return alg->init(acomp);82 83 return 0;84}85 86static unsigned int crypto_acomp_extsize(struct crypto_alg *alg)87{88 int extsize = crypto_alg_extsize(alg);89 90 if (alg->cra_type != &crypto_acomp_type)91 extsize += sizeof(struct crypto_scomp *);92 93 return extsize;94}95 96static const struct crypto_type crypto_acomp_type = {97 .extsize = crypto_acomp_extsize,98 .init_tfm = crypto_acomp_init_tfm,99#ifdef CONFIG_PROC_FS100 .show = crypto_acomp_show,101#endif102#if IS_ENABLED(CONFIG_CRYPTO_USER)103 .report = crypto_acomp_report,104#endif105 .maskclear = ~CRYPTO_ALG_TYPE_MASK,106 .maskset = CRYPTO_ALG_TYPE_ACOMPRESS_MASK,107 .type = CRYPTO_ALG_TYPE_ACOMPRESS,108 .tfmsize = offsetof(struct crypto_acomp, base),109};110 111struct crypto_acomp *crypto_alloc_acomp(const char *alg_name, u32 type,112 u32 mask)113{114 return crypto_alloc_tfm(alg_name, &crypto_acomp_type, type, mask);115}116EXPORT_SYMBOL_GPL(crypto_alloc_acomp);117 118struct crypto_acomp *crypto_alloc_acomp_node(const char *alg_name, u32 type,119 u32 mask, int node)120{121 return crypto_alloc_tfm_node(alg_name, &crypto_acomp_type, type, mask,122 node);123}124EXPORT_SYMBOL_GPL(crypto_alloc_acomp_node);125 126struct acomp_req *acomp_request_alloc(struct crypto_acomp *acomp)127{128 struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);129 struct acomp_req *req;130 131 req = __acomp_request_alloc(acomp);132 if (req && (tfm->__crt_alg->cra_type != &crypto_acomp_type))133 return crypto_acomp_scomp_alloc_ctx(req);134 135 return req;136}137EXPORT_SYMBOL_GPL(acomp_request_alloc);138 139void acomp_request_free(struct acomp_req *req)140{141 struct crypto_acomp *acomp = crypto_acomp_reqtfm(req);142 struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);143 144 if (tfm->__crt_alg->cra_type != &crypto_acomp_type)145 crypto_acomp_scomp_free_ctx(req);146 147 if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) {148 acomp->dst_free(req->dst);149 req->dst = NULL;150 }151 152 __acomp_request_free(req);153}154EXPORT_SYMBOL_GPL(acomp_request_free);155 156void comp_prepare_alg(struct comp_alg_common *alg)157{158 struct crypto_alg *base = &alg->base;159 160 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;161}162 163int crypto_register_acomp(struct acomp_alg *alg)164{165 struct crypto_alg *base = &alg->calg.base;166 167 comp_prepare_alg(&alg->calg);168 169 base->cra_type = &crypto_acomp_type;170 base->cra_flags |= CRYPTO_ALG_TYPE_ACOMPRESS;171 172 return crypto_register_alg(base);173}174EXPORT_SYMBOL_GPL(crypto_register_acomp);175 176void crypto_unregister_acomp(struct acomp_alg *alg)177{178 crypto_unregister_alg(&alg->base);179}180EXPORT_SYMBOL_GPL(crypto_unregister_acomp);181 182int crypto_register_acomps(struct acomp_alg *algs, int count)183{184 int i, ret;185 186 for (i = 0; i < count; i++) {187 ret = crypto_register_acomp(&algs[i]);188 if (ret)189 goto err;190 }191 192 return 0;193 194err:195 for (--i; i >= 0; --i)196 crypto_unregister_acomp(&algs[i]);197 198 return ret;199}200EXPORT_SYMBOL_GPL(crypto_register_acomps);201 202void crypto_unregister_acomps(struct acomp_alg *algs, int count)203{204 int i;205 206 for (i = count - 1; i >= 0; --i)207 crypto_unregister_acomp(&algs[i]);208}209EXPORT_SYMBOL_GPL(crypto_unregister_acomps);210 211MODULE_LICENSE("GPL");212MODULE_DESCRIPTION("Asynchronous compression type");213