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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>
22#include "internal.h"
23
24static const struct crypto_type crypto_acomp_type;
25
26#ifdef CONFIG_NET
27static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg)
28{
29 struct crypto_report_acomp racomp;
30
31 memset(&racomp, 0, sizeof(racomp));
32
33 strscpy(racomp.type, "acomp", sizeof(racomp.type));
34
35 return nla_put(skb, CRYPTOCFGA_REPORT_ACOMP, sizeof(racomp), &racomp);
36}
37#else
38static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg)
39{
40 return -ENOSYS;
41}
42#endif
43
44static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
45 __maybe_unused;
46
47static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
48{
49 seq_puts(m, "type : acomp\n");
50}
51
52static void crypto_acomp_exit_tfm(struct crypto_tfm *tfm)
53{
54 struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
55 struct acomp_alg *alg = crypto_acomp_alg(acomp);
56
57 alg->exit(acomp);
58}
59
60static int crypto_acomp_init_tfm(struct crypto_tfm *tfm)
61{
62 struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
63 struct acomp_alg *alg = crypto_acomp_alg(acomp);
64
65 if (tfm->__crt_alg->cra_type != &crypto_acomp_type)
66 return crypto_init_scomp_ops_async(tfm);
67
68 acomp->compress = alg->compress;
69 acomp->decompress = alg->decompress;
70 acomp->dst_free = alg->dst_free;
71 acomp->reqsize = alg->reqsize;
72
73 if (alg->exit)
74 acomp->base.exit = crypto_acomp_exit_tfm;
75
76 if (alg->init)
77 return alg->init(acomp);
78
79 return 0;
80}
81
82static unsigned int crypto_acomp_extsize(struct crypto_alg *alg)
83{
84 int extsize = crypto_alg_extsize(alg);
85
86 if (alg->cra_type != &crypto_acomp_type)
87 extsize += sizeof(struct crypto_scomp *);
88
89 return extsize;
90}
91
92static const struct crypto_type crypto_acomp_type = {
93 .extsize = crypto_acomp_extsize,
94 .init_tfm = crypto_acomp_init_tfm,
95#ifdef CONFIG_PROC_FS
96 .show = crypto_acomp_show,
97#endif
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),
103};
104
105struct crypto_acomp *crypto_alloc_acomp(const char *alg_name, u32 type,
106 u32 mask)
107{
108 return crypto_alloc_tfm(alg_name, &crypto_acomp_type, type, mask);
109}
110EXPORT_SYMBOL_GPL(crypto_alloc_acomp);
111
112struct crypto_acomp *crypto_alloc_acomp_node(const char *alg_name, u32 type,
113 u32 mask, int node)
114{
115 return crypto_alloc_tfm_node(alg_name, &crypto_acomp_type, type, mask,
116 node);
117}
118EXPORT_SYMBOL_GPL(crypto_alloc_acomp_node);
119
120struct acomp_req *acomp_request_alloc(struct crypto_acomp *acomp)
121{
122 struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
123 struct acomp_req *req;
124
125 req = __acomp_request_alloc(acomp);
126 if (req && (tfm->__crt_alg->cra_type != &crypto_acomp_type))
127 return crypto_acomp_scomp_alloc_ctx(req);
128
129 return req;
130}
131EXPORT_SYMBOL_GPL(acomp_request_alloc);
132
133void acomp_request_free(struct acomp_req *req)
134{
135 struct crypto_acomp *acomp = crypto_acomp_reqtfm(req);
136 struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
137
138 if (tfm->__crt_alg->cra_type != &crypto_acomp_type)
139 crypto_acomp_scomp_free_ctx(req);
140
141 if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) {
142 acomp->dst_free(req->dst);
143 req->dst = NULL;
144 }
145
146 __acomp_request_free(req);
147}
148EXPORT_SYMBOL_GPL(acomp_request_free);
149
150int crypto_register_acomp(struct acomp_alg *alg)
151{
152 struct crypto_alg *base = &alg->base;
153
154 base->cra_type = &crypto_acomp_type;
155 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
156 base->cra_flags |= CRYPTO_ALG_TYPE_ACOMPRESS;
157
158 return crypto_register_alg(base);
159}
160EXPORT_SYMBOL_GPL(crypto_register_acomp);
161
162void crypto_unregister_acomp(struct acomp_alg *alg)
163{
164 crypto_unregister_alg(&alg->base);
165}
166EXPORT_SYMBOL_GPL(crypto_unregister_acomp);
167
168int crypto_register_acomps(struct acomp_alg *algs, int count)
169{
170 int i, ret;
171
172 for (i = 0; i < count; i++) {
173 ret = crypto_register_acomp(&algs[i]);
174 if (ret)
175 goto err;
176 }
177
178 return 0;
179
180err:
181 for (--i; i >= 0; --i)
182 crypto_unregister_acomp(&algs[i]);
183
184 return ret;
185}
186EXPORT_SYMBOL_GPL(crypto_register_acomps);
187
188void crypto_unregister_acomps(struct acomp_alg *algs, int count)
189{
190 int i;
191
192 for (i = count - 1; i >= 0; --i)
193 crypto_unregister_acomp(&algs[i]);
194}
195EXPORT_SYMBOL_GPL(crypto_unregister_acomps);
196
197MODULE_LICENSE("GPL");
198MODULE_DESCRIPTION("Asynchronous compression type");
199
