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![Giovanni Cabiddu](/assets/img/avatar_default.png)
Add crypto_register_acomps and crypto_unregister_acomps to allow the registration of multiple implementations with one call. Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
199 lines
4.8 KiB
C
199 lines
4.8 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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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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strncpy(racomp.type, "acomp", sizeof(racomp.type));
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if (nla_put(skb, CRYPTOCFGA_REPORT_ACOMP,
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sizeof(struct crypto_report_acomp), &racomp))
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goto nla_put_failure;
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return 0;
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nla_put_failure:
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return -EMSGSIZE;
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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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