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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2ebda74f GC |
2 | /* |
3 | * Asynchronous Compression operations | |
4 | * | |
5 | * Copyright (c) 2016, Intel Corporation | |
6 | * Authors: Weigang Li <weigang.li@intel.com> | |
7 | * Giovanni Cabiddu <giovanni.cabiddu@intel.com> | |
2ebda74f GC |
8 | */ |
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> | |
d8c34b94 | 18 | #include <linux/compiler.h> |
2ebda74f GC |
19 | #include <net/netlink.h> |
20 | #include <crypto/internal/acompress.h> | |
1ab53a77 | 21 | #include <crypto/internal/scompress.h> |
2ebda74f GC |
22 | #include "internal.h" |
23 | ||
1ab53a77 GC |
24 | static const struct crypto_type crypto_acomp_type; |
25 | ||
2ebda74f GC |
26 | #ifdef CONFIG_NET |
27 | static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg) | |
28 | { | |
29 | struct crypto_report_acomp racomp; | |
30 | ||
37db69e0 | 31 | memset(&racomp, 0, sizeof(racomp)); |
2ebda74f | 32 | |
37db69e0 | 33 | strscpy(racomp.type, "acomp", sizeof(racomp.type)); |
2ebda74f | 34 | |
37db69e0 | 35 | return nla_put(skb, CRYPTOCFGA_REPORT_ACOMP, sizeof(racomp), &racomp); |
2ebda74f GC |
36 | } |
37 | #else | |
38 | static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg) | |
39 | { | |
40 | return -ENOSYS; | |
41 | } | |
42 | #endif | |
43 | ||
44 | static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg) | |
d8c34b94 | 45 | __maybe_unused; |
2ebda74f GC |
46 | |
47 | static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg) | |
48 | { | |
49 | seq_puts(m, "type : acomp\n"); | |
50 | } | |
51 | ||
52 | static 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 | ||
60 | static 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 | ||
1ab53a77 GC |
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 | ||
2ebda74f GC |
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 | ||
1ab53a77 GC |
82 | static 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 | ||
2ebda74f | 92 | static const struct crypto_type crypto_acomp_type = { |
1ab53a77 | 93 | .extsize = crypto_acomp_extsize, |
2ebda74f GC |
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, | |
1ab53a77 | 100 | .maskset = CRYPTO_ALG_TYPE_ACOMPRESS_MASK, |
2ebda74f GC |
101 | .type = CRYPTO_ALG_TYPE_ACOMPRESS, |
102 | .tfmsize = offsetof(struct crypto_acomp, base), | |
103 | }; | |
104 | ||
105 | struct 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 | } | |
110 | EXPORT_SYMBOL_GPL(crypto_alloc_acomp); | |
111 | ||
1ab53a77 GC |
112 | struct acomp_req *acomp_request_alloc(struct crypto_acomp *acomp) |
113 | { | |
114 | struct crypto_tfm *tfm = crypto_acomp_tfm(acomp); | |
115 | struct acomp_req *req; | |
116 | ||
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); | |
120 | ||
121 | return req; | |
122 | } | |
123 | EXPORT_SYMBOL_GPL(acomp_request_alloc); | |
124 | ||
125 | void acomp_request_free(struct acomp_req *req) | |
126 | { | |
127 | struct crypto_acomp *acomp = crypto_acomp_reqtfm(req); | |
128 | struct crypto_tfm *tfm = crypto_acomp_tfm(acomp); | |
129 | ||
130 | if (tfm->__crt_alg->cra_type != &crypto_acomp_type) | |
131 | crypto_acomp_scomp_free_ctx(req); | |
132 | ||
133 | if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) { | |
134 | acomp->dst_free(req->dst); | |
135 | req->dst = NULL; | |
136 | } | |
137 | ||
138 | __acomp_request_free(req); | |
139 | } | |
140 | EXPORT_SYMBOL_GPL(acomp_request_free); | |
141 | ||
2ebda74f GC |
142 | int crypto_register_acomp(struct acomp_alg *alg) |
143 | { | |
144 | struct crypto_alg *base = &alg->base; | |
145 | ||
146 | base->cra_type = &crypto_acomp_type; | |
147 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; | |
148 | base->cra_flags |= CRYPTO_ALG_TYPE_ACOMPRESS; | |
149 | ||
150 | return crypto_register_alg(base); | |
151 | } | |
152 | EXPORT_SYMBOL_GPL(crypto_register_acomp); | |
153 | ||
c6d633a9 | 154 | void crypto_unregister_acomp(struct acomp_alg *alg) |
2ebda74f | 155 | { |
c6d633a9 | 156 | crypto_unregister_alg(&alg->base); |
2ebda74f GC |
157 | } |
158 | EXPORT_SYMBOL_GPL(crypto_unregister_acomp); | |
159 | ||
3ce5bc72 GC |
160 | int crypto_register_acomps(struct acomp_alg *algs, int count) |
161 | { | |
162 | int i, ret; | |
163 | ||
164 | for (i = 0; i < count; i++) { | |
165 | ret = crypto_register_acomp(&algs[i]); | |
166 | if (ret) | |
167 | goto err; | |
168 | } | |
169 | ||
170 | return 0; | |
171 | ||
172 | err: | |
173 | for (--i; i >= 0; --i) | |
174 | crypto_unregister_acomp(&algs[i]); | |
175 | ||
176 | return ret; | |
177 | } | |
178 | EXPORT_SYMBOL_GPL(crypto_register_acomps); | |
179 | ||
180 | void crypto_unregister_acomps(struct acomp_alg *algs, int count) | |
181 | { | |
182 | int i; | |
183 | ||
184 | for (i = count - 1; i >= 0; --i) | |
185 | crypto_unregister_acomp(&algs[i]); | |
186 | } | |
187 | EXPORT_SYMBOL_GPL(crypto_unregister_acomps); | |
188 | ||
2ebda74f GC |
189 | MODULE_LICENSE("GPL"); |
190 | MODULE_DESCRIPTION("Asynchronous compression type"); |