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>
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>
24 static const struct crypto_type crypto_acomp_type;
26 static inline struct acomp_alg *__crypto_acomp_alg(struct crypto_alg *alg)
28 return container_of(alg, struct acomp_alg, calg.base);
31 static inline struct acomp_alg *crypto_acomp_alg(struct crypto_acomp *tfm)
33 return __crypto_acomp_alg(crypto_acomp_tfm(tfm)->__crt_alg);
37 static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg)
39 struct crypto_report_acomp racomp;
41 memset(&racomp, 0, sizeof(racomp));
43 strscpy(racomp.type, "acomp", sizeof(racomp.type));
45 return nla_put(skb, CRYPTOCFGA_REPORT_ACOMP, sizeof(racomp), &racomp);
48 static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg)
54 static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
57 static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
59 seq_puts(m, "type : acomp\n");
62 static void crypto_acomp_exit_tfm(struct crypto_tfm *tfm)
64 struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
65 struct acomp_alg *alg = crypto_acomp_alg(acomp);
70 static int crypto_acomp_init_tfm(struct crypto_tfm *tfm)
72 struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
73 struct acomp_alg *alg = crypto_acomp_alg(acomp);
75 if (tfm->__crt_alg->cra_type != &crypto_acomp_type)
76 return crypto_init_scomp_ops_async(tfm);
78 acomp->compress = alg->compress;
79 acomp->decompress = alg->decompress;
80 acomp->dst_free = alg->dst_free;
81 acomp->reqsize = alg->reqsize;
84 acomp->base.exit = crypto_acomp_exit_tfm;
87 return alg->init(acomp);
92 static unsigned int crypto_acomp_extsize(struct crypto_alg *alg)
94 int extsize = crypto_alg_extsize(alg);
96 if (alg->cra_type != &crypto_acomp_type)
97 extsize += sizeof(struct crypto_scomp *);
102 static inline int __crypto_acomp_report_stat(struct sk_buff *skb,
103 struct crypto_alg *alg)
105 struct comp_alg_common *calg = __crypto_comp_alg_common(alg);
106 struct crypto_istat_compress *istat = comp_get_stat(calg);
107 struct crypto_stat_compress racomp;
109 memset(&racomp, 0, sizeof(racomp));
111 strscpy(racomp.type, "acomp", sizeof(racomp.type));
112 racomp.stat_compress_cnt = atomic64_read(&istat->compress_cnt);
113 racomp.stat_compress_tlen = atomic64_read(&istat->compress_tlen);
114 racomp.stat_decompress_cnt = atomic64_read(&istat->decompress_cnt);
115 racomp.stat_decompress_tlen = atomic64_read(&istat->decompress_tlen);
116 racomp.stat_err_cnt = atomic64_read(&istat->err_cnt);
118 return nla_put(skb, CRYPTOCFGA_STAT_ACOMP, sizeof(racomp), &racomp);
121 #ifdef CONFIG_CRYPTO_STATS
122 int crypto_acomp_report_stat(struct sk_buff *skb, struct crypto_alg *alg)
124 return __crypto_acomp_report_stat(skb, alg);
128 static const struct crypto_type crypto_acomp_type = {
129 .extsize = crypto_acomp_extsize,
130 .init_tfm = crypto_acomp_init_tfm,
131 #ifdef CONFIG_PROC_FS
132 .show = crypto_acomp_show,
134 .report = crypto_acomp_report,
135 #ifdef CONFIG_CRYPTO_STATS
136 .report_stat = crypto_acomp_report_stat,
138 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
139 .maskset = CRYPTO_ALG_TYPE_ACOMPRESS_MASK,
140 .type = CRYPTO_ALG_TYPE_ACOMPRESS,
141 .tfmsize = offsetof(struct crypto_acomp, base),
144 struct crypto_acomp *crypto_alloc_acomp(const char *alg_name, u32 type,
147 return crypto_alloc_tfm(alg_name, &crypto_acomp_type, type, mask);
149 EXPORT_SYMBOL_GPL(crypto_alloc_acomp);
151 struct crypto_acomp *crypto_alloc_acomp_node(const char *alg_name, u32 type,
154 return crypto_alloc_tfm_node(alg_name, &crypto_acomp_type, type, mask,
157 EXPORT_SYMBOL_GPL(crypto_alloc_acomp_node);
159 struct acomp_req *acomp_request_alloc(struct crypto_acomp *acomp)
161 struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
162 struct acomp_req *req;
164 req = __acomp_request_alloc(acomp);
165 if (req && (tfm->__crt_alg->cra_type != &crypto_acomp_type))
166 return crypto_acomp_scomp_alloc_ctx(req);
170 EXPORT_SYMBOL_GPL(acomp_request_alloc);
172 void acomp_request_free(struct acomp_req *req)
174 struct crypto_acomp *acomp = crypto_acomp_reqtfm(req);
175 struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
177 if (tfm->__crt_alg->cra_type != &crypto_acomp_type)
178 crypto_acomp_scomp_free_ctx(req);
180 if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) {
181 acomp->dst_free(req->dst);
185 __acomp_request_free(req);
187 EXPORT_SYMBOL_GPL(acomp_request_free);
189 void comp_prepare_alg(struct comp_alg_common *alg)
191 struct crypto_istat_compress *istat = comp_get_stat(alg);
192 struct crypto_alg *base = &alg->base;
194 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
196 if (IS_ENABLED(CONFIG_CRYPTO_STATS))
197 memset(istat, 0, sizeof(*istat));
200 int crypto_register_acomp(struct acomp_alg *alg)
202 struct crypto_alg *base = &alg->calg.base;
204 comp_prepare_alg(&alg->calg);
206 base->cra_type = &crypto_acomp_type;
207 base->cra_flags |= CRYPTO_ALG_TYPE_ACOMPRESS;
209 return crypto_register_alg(base);
211 EXPORT_SYMBOL_GPL(crypto_register_acomp);
213 void crypto_unregister_acomp(struct acomp_alg *alg)
215 crypto_unregister_alg(&alg->base);
217 EXPORT_SYMBOL_GPL(crypto_unregister_acomp);
219 int crypto_register_acomps(struct acomp_alg *algs, int count)
223 for (i = 0; i < count; i++) {
224 ret = crypto_register_acomp(&algs[i]);
232 for (--i; i >= 0; --i)
233 crypto_unregister_acomp(&algs[i]);
237 EXPORT_SYMBOL_GPL(crypto_register_acomps);
239 void crypto_unregister_acomps(struct acomp_alg *algs, int count)
243 for (i = count - 1; i >= 0; --i)
244 crypto_unregister_acomp(&algs[i]);
246 EXPORT_SYMBOL_GPL(crypto_unregister_acomps);
248 MODULE_LICENSE("GPL");
249 MODULE_DESCRIPTION("Asynchronous compression type");