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![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
190 lines
4.5 KiB
C
190 lines
4.5 KiB
C
// 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 <weigang.li@intel.com>
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* Giovanni Cabiddu <giovanni.cabiddu@intel.com>
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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 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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int crypto_unregister_acomp(struct acomp_alg *alg)
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{
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return 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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