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);
36 static int __maybe_unused crypto_acomp_report(
37 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 void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
51 static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
53 seq_puts(m, "type : acomp\n");
56 static void crypto_acomp_exit_tfm(struct crypto_tfm *tfm)
58 struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
59 struct acomp_alg *alg = crypto_acomp_alg(acomp);
64 static int crypto_acomp_init_tfm(struct crypto_tfm *tfm)
66 struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
67 struct acomp_alg *alg = crypto_acomp_alg(acomp);
69 if (tfm->__crt_alg->cra_type != &crypto_acomp_type)
70 return crypto_init_scomp_ops_async(tfm);
72 acomp->compress = alg->compress;
73 acomp->decompress = alg->decompress;
74 acomp->dst_free = alg->dst_free;
75 acomp->reqsize = alg->reqsize;
78 acomp->base.exit = crypto_acomp_exit_tfm;
81 return alg->init(acomp);
86 static unsigned int crypto_acomp_extsize(struct crypto_alg *alg)
88 int extsize = crypto_alg_extsize(alg);
90 if (alg->cra_type != &crypto_acomp_type)
91 extsize += sizeof(struct crypto_scomp *);
96 static inline int __crypto_acomp_report_stat(struct sk_buff *skb,
97 struct crypto_alg *alg)
99 struct comp_alg_common *calg = __crypto_comp_alg_common(alg);
100 struct crypto_istat_compress *istat = comp_get_stat(calg);
101 struct crypto_stat_compress racomp;
103 memset(&racomp, 0, sizeof(racomp));
105 strscpy(racomp.type, "acomp", sizeof(racomp.type));
106 racomp.stat_compress_cnt = atomic64_read(&istat->compress_cnt);
107 racomp.stat_compress_tlen = atomic64_read(&istat->compress_tlen);
108 racomp.stat_decompress_cnt = atomic64_read(&istat->decompress_cnt);
109 racomp.stat_decompress_tlen = atomic64_read(&istat->decompress_tlen);
110 racomp.stat_err_cnt = atomic64_read(&istat->err_cnt);
112 return nla_put(skb, CRYPTOCFGA_STAT_ACOMP, sizeof(racomp), &racomp);
115 #ifdef CONFIG_CRYPTO_STATS
116 int crypto_acomp_report_stat(struct sk_buff *skb, struct crypto_alg *alg)
118 return __crypto_acomp_report_stat(skb, alg);
122 static const struct crypto_type crypto_acomp_type = {
123 .extsize = crypto_acomp_extsize,
124 .init_tfm = crypto_acomp_init_tfm,
125 #ifdef CONFIG_PROC_FS
126 .show = crypto_acomp_show,
128 #ifdef CONFIG_CRYPTO_USER
129 .report = crypto_acomp_report,
131 #ifdef CONFIG_CRYPTO_STATS
132 .report_stat = crypto_acomp_report_stat,
134 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
135 .maskset = CRYPTO_ALG_TYPE_ACOMPRESS_MASK,
136 .type = CRYPTO_ALG_TYPE_ACOMPRESS,
137 .tfmsize = offsetof(struct crypto_acomp, base),
140 struct crypto_acomp *crypto_alloc_acomp(const char *alg_name, u32 type,
143 return crypto_alloc_tfm(alg_name, &crypto_acomp_type, type, mask);
145 EXPORT_SYMBOL_GPL(crypto_alloc_acomp);
147 struct crypto_acomp *crypto_alloc_acomp_node(const char *alg_name, u32 type,
150 return crypto_alloc_tfm_node(alg_name, &crypto_acomp_type, type, mask,
153 EXPORT_SYMBOL_GPL(crypto_alloc_acomp_node);
155 struct acomp_req *acomp_request_alloc(struct crypto_acomp *acomp)
157 struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
158 struct acomp_req *req;
160 req = __acomp_request_alloc(acomp);
161 if (req && (tfm->__crt_alg->cra_type != &crypto_acomp_type))
162 return crypto_acomp_scomp_alloc_ctx(req);
166 EXPORT_SYMBOL_GPL(acomp_request_alloc);
168 void acomp_request_free(struct acomp_req *req)
170 struct crypto_acomp *acomp = crypto_acomp_reqtfm(req);
171 struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
173 if (tfm->__crt_alg->cra_type != &crypto_acomp_type)
174 crypto_acomp_scomp_free_ctx(req);
176 if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) {
177 acomp->dst_free(req->dst);
181 __acomp_request_free(req);
183 EXPORT_SYMBOL_GPL(acomp_request_free);
185 void comp_prepare_alg(struct comp_alg_common *alg)
187 struct crypto_istat_compress *istat = comp_get_stat(alg);
188 struct crypto_alg *base = &alg->base;
190 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
192 if (IS_ENABLED(CONFIG_CRYPTO_STATS))
193 memset(istat, 0, sizeof(*istat));
196 int crypto_register_acomp(struct acomp_alg *alg)
198 struct crypto_alg *base = &alg->calg.base;
200 comp_prepare_alg(&alg->calg);
202 base->cra_type = &crypto_acomp_type;
203 base->cra_flags |= CRYPTO_ALG_TYPE_ACOMPRESS;
205 return crypto_register_alg(base);
207 EXPORT_SYMBOL_GPL(crypto_register_acomp);
209 void crypto_unregister_acomp(struct acomp_alg *alg)
211 crypto_unregister_alg(&alg->base);
213 EXPORT_SYMBOL_GPL(crypto_unregister_acomp);
215 int crypto_register_acomps(struct acomp_alg *algs, int count)
219 for (i = 0; i < count; i++) {
220 ret = crypto_register_acomp(&algs[i]);
228 for (--i; i >= 0; --i)
229 crypto_unregister_acomp(&algs[i]);
233 EXPORT_SYMBOL_GPL(crypto_register_acomps);
235 void crypto_unregister_acomps(struct acomp_alg *algs, int count)
239 for (i = count - 1; i >= 0; --i)
240 crypto_unregister_acomp(&algs[i]);
242 EXPORT_SYMBOL_GPL(crypto_unregister_acomps);
244 MODULE_LICENSE("GPL");
245 MODULE_DESCRIPTION("Asynchronous compression type");