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198 lines
4.7 KiB
198 lines
4.7 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Asynchronous Compression operations |
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* |
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* Copyright (c) 2016, Intel Corporation |
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* Authors: Weigang Li <[email protected]> |
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* Giovanni Cabiddu <[email protected]> |
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*/ |
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#include <linux/errno.h> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/seq_file.h> |
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#include <linux/slab.h> |
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#include <linux/string.h> |
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#include <linux/crypto.h> |
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#include <crypto/algapi.h> |
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#include <linux/cryptouser.h> |
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#include <linux/compiler.h> |
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#include <net/netlink.h> |
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#include <crypto/internal/acompress.h> |
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#include <crypto/internal/scompress.h> |
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#include "internal.h" |
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static const struct crypto_type crypto_acomp_type; |
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#ifdef CONFIG_NET |
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static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg) |
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{ |
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struct crypto_report_acomp racomp; |
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memset(&racomp, 0, sizeof(racomp)); |
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strscpy(racomp.type, "acomp", sizeof(racomp.type)); |
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return nla_put(skb, CRYPTOCFGA_REPORT_ACOMP, sizeof(racomp), &racomp); |
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} |
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#else |
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static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg) |
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{ |
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return -ENOSYS; |
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} |
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#endif |
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static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg) |
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__maybe_unused; |
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static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg) |
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{ |
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seq_puts(m, "type : acomp\n"); |
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} |
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static void crypto_acomp_exit_tfm(struct crypto_tfm *tfm) |
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{ |
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struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm); |
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struct acomp_alg *alg = crypto_acomp_alg(acomp); |
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alg->exit(acomp); |
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} |
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static int crypto_acomp_init_tfm(struct crypto_tfm *tfm) |
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{ |
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struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm); |
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struct acomp_alg *alg = crypto_acomp_alg(acomp); |
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if (tfm->__crt_alg->cra_type != &crypto_acomp_type) |
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return crypto_init_scomp_ops_async(tfm); |
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acomp->compress = alg->compress; |
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acomp->decompress = alg->decompress; |
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acomp->dst_free = alg->dst_free; |
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acomp->reqsize = alg->reqsize; |
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if (alg->exit) |
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acomp->base.exit = crypto_acomp_exit_tfm; |
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if (alg->init) |
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return alg->init(acomp); |
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return 0; |
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} |
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static unsigned int crypto_acomp_extsize(struct crypto_alg *alg) |
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{ |
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int extsize = crypto_alg_extsize(alg); |
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if (alg->cra_type != &crypto_acomp_type) |
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extsize += sizeof(struct crypto_scomp *); |
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return extsize; |
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} |
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static const struct crypto_type crypto_acomp_type = { |
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.extsize = crypto_acomp_extsize, |
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.init_tfm = crypto_acomp_init_tfm, |
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#ifdef CONFIG_PROC_FS |
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.show = crypto_acomp_show, |
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#endif |
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.report = crypto_acomp_report, |
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.maskclear = ~CRYPTO_ALG_TYPE_MASK, |
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.maskset = CRYPTO_ALG_TYPE_ACOMPRESS_MASK, |
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.type = CRYPTO_ALG_TYPE_ACOMPRESS, |
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.tfmsize = offsetof(struct crypto_acomp, base), |
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}; |
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struct crypto_acomp *crypto_alloc_acomp(const char *alg_name, u32 type, |
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u32 mask) |
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{ |
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return crypto_alloc_tfm(alg_name, &crypto_acomp_type, type, mask); |
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} |
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EXPORT_SYMBOL_GPL(crypto_alloc_acomp); |
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struct crypto_acomp *crypto_alloc_acomp_node(const char *alg_name, u32 type, |
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u32 mask, int node) |
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{ |
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return crypto_alloc_tfm_node(alg_name, &crypto_acomp_type, type, mask, |
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node); |
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} |
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EXPORT_SYMBOL_GPL(crypto_alloc_acomp_node); |
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struct acomp_req *acomp_request_alloc(struct crypto_acomp *acomp) |
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{ |
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struct crypto_tfm *tfm = crypto_acomp_tfm(acomp); |
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struct acomp_req *req; |
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req = __acomp_request_alloc(acomp); |
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if (req && (tfm->__crt_alg->cra_type != &crypto_acomp_type)) |
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return crypto_acomp_scomp_alloc_ctx(req); |
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return req; |
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} |
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EXPORT_SYMBOL_GPL(acomp_request_alloc); |
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void acomp_request_free(struct acomp_req *req) |
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{ |
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struct crypto_acomp *acomp = crypto_acomp_reqtfm(req); |
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struct crypto_tfm *tfm = crypto_acomp_tfm(acomp); |
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if (tfm->__crt_alg->cra_type != &crypto_acomp_type) |
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crypto_acomp_scomp_free_ctx(req); |
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if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) { |
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acomp->dst_free(req->dst); |
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req->dst = NULL; |
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} |
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__acomp_request_free(req); |
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} |
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EXPORT_SYMBOL_GPL(acomp_request_free); |
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int crypto_register_acomp(struct acomp_alg *alg) |
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{ |
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struct crypto_alg *base = &alg->base; |
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base->cra_type = &crypto_acomp_type; |
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base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; |
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base->cra_flags |= CRYPTO_ALG_TYPE_ACOMPRESS; |
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return crypto_register_alg(base); |
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} |
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EXPORT_SYMBOL_GPL(crypto_register_acomp); |
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void crypto_unregister_acomp(struct acomp_alg *alg) |
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{ |
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crypto_unregister_alg(&alg->base); |
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} |
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EXPORT_SYMBOL_GPL(crypto_unregister_acomp); |
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int crypto_register_acomps(struct acomp_alg *algs, int count) |
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{ |
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int i, ret; |
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for (i = 0; i < count; i++) { |
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ret = crypto_register_acomp(&algs[i]); |
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if (ret) |
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goto err; |
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} |
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return 0; |
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err: |
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for (--i; i >= 0; --i) |
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crypto_unregister_acomp(&algs[i]); |
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return ret; |
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} |
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EXPORT_SYMBOL_GPL(crypto_register_acomps); |
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void crypto_unregister_acomps(struct acomp_alg *algs, int count) |
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{ |
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int i; |
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for (i = count - 1; i >= 0; --i) |
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crypto_unregister_acomp(&algs[i]); |
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} |
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EXPORT_SYMBOL_GPL(crypto_unregister_acomps); |
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MODULE_LICENSE("GPL"); |
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MODULE_DESCRIPTION("Asynchronous compression type");
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