1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Asynchronous Compression operations
5 * Copyright (c) 2016, Intel Corporation
6 * Authors: Weigang Li <weigang.li@intel.com>
7 * Giovanni Cabiddu <giovanni.cabiddu@intel.com>
9 #include <linux/errno.h>
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/seq_file.h>
13 #include <linux/slab.h>
14 #include <linux/string.h>
15 #include <linux/crypto.h>
16 #include <crypto/algapi.h>
17 #include <linux/cryptouser.h>
18 #include <linux/compiler.h>
19 #include <net/netlink.h>
20 #include <crypto/internal/acompress.h>
21 #include <crypto/internal/scompress.h>
24 static const struct crypto_type crypto_acomp_type;
27 static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg)
29 struct crypto_report_acomp racomp;
31 memset(&racomp, 0, sizeof(racomp));
33 strscpy(racomp.type, "acomp", sizeof(racomp.type));
35 return nla_put(skb, CRYPTOCFGA_REPORT_ACOMP, sizeof(racomp), &racomp);
38 static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg)
44 static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
47 static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
49 seq_puts(m, "type : acomp\n");
52 static void crypto_acomp_exit_tfm(struct crypto_tfm *tfm)
54 struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
55 struct acomp_alg *alg = crypto_acomp_alg(acomp);
60 static int crypto_acomp_init_tfm(struct crypto_tfm *tfm)
62 struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
63 struct acomp_alg *alg = crypto_acomp_alg(acomp);
65 if (tfm->__crt_alg->cra_type != &crypto_acomp_type)
66 return crypto_init_scomp_ops_async(tfm);
68 acomp->compress = alg->compress;
69 acomp->decompress = alg->decompress;
70 acomp->dst_free = alg->dst_free;
71 acomp->reqsize = alg->reqsize;
74 acomp->base.exit = crypto_acomp_exit_tfm;
77 return alg->init(acomp);
82 static unsigned int crypto_acomp_extsize(struct crypto_alg *alg)
84 int extsize = crypto_alg_extsize(alg);
86 if (alg->cra_type != &crypto_acomp_type)
87 extsize += sizeof(struct crypto_scomp *);
92 static const struct crypto_type crypto_acomp_type = {
93 .extsize = crypto_acomp_extsize,
94 .init_tfm = crypto_acomp_init_tfm,
96 .show = crypto_acomp_show,
98 .report = crypto_acomp_report,
99 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
100 .maskset = CRYPTO_ALG_TYPE_ACOMPRESS_MASK,
101 .type = CRYPTO_ALG_TYPE_ACOMPRESS,
102 .tfmsize = offsetof(struct crypto_acomp, base),
105 struct crypto_acomp *crypto_alloc_acomp(const char *alg_name, u32 type,
108 return crypto_alloc_tfm(alg_name, &crypto_acomp_type, type, mask);
110 EXPORT_SYMBOL_GPL(crypto_alloc_acomp);
112 struct acomp_req *acomp_request_alloc(struct crypto_acomp *acomp)
114 struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
115 struct acomp_req *req;
117 req = __acomp_request_alloc(acomp);
118 if (req && (tfm->__crt_alg->cra_type != &crypto_acomp_type))
119 return crypto_acomp_scomp_alloc_ctx(req);
123 EXPORT_SYMBOL_GPL(acomp_request_alloc);
125 void acomp_request_free(struct acomp_req *req)
127 struct crypto_acomp *acomp = crypto_acomp_reqtfm(req);
128 struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
130 if (tfm->__crt_alg->cra_type != &crypto_acomp_type)
131 crypto_acomp_scomp_free_ctx(req);
133 if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) {
134 acomp->dst_free(req->dst);
138 __acomp_request_free(req);
140 EXPORT_SYMBOL_GPL(acomp_request_free);
142 int crypto_register_acomp(struct acomp_alg *alg)
144 struct crypto_alg *base = &alg->base;
146 base->cra_type = &crypto_acomp_type;
147 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
148 base->cra_flags |= CRYPTO_ALG_TYPE_ACOMPRESS;
150 return crypto_register_alg(base);
152 EXPORT_SYMBOL_GPL(crypto_register_acomp);
154 int crypto_unregister_acomp(struct acomp_alg *alg)
156 return crypto_unregister_alg(&alg->base);
158 EXPORT_SYMBOL_GPL(crypto_unregister_acomp);
160 int crypto_register_acomps(struct acomp_alg *algs, int count)
164 for (i = 0; i < count; i++) {
165 ret = crypto_register_acomp(&algs[i]);
173 for (--i; i >= 0; --i)
174 crypto_unregister_acomp(&algs[i]);
178 EXPORT_SYMBOL_GPL(crypto_register_acomps);
180 void crypto_unregister_acomps(struct acomp_alg *algs, int count)
184 for (i = count - 1; i >= 0; --i)
185 crypto_unregister_acomp(&algs[i]);
187 EXPORT_SYMBOL_GPL(crypto_unregister_acomps);
189 MODULE_LICENSE("GPL");
190 MODULE_DESCRIPTION("Asynchronous compression type");