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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 | 8 | */ |
0a742389 HX |
9 | |
10 | #include <crypto/internal/acompress.h> | |
11 | #include <linux/cryptouser.h> | |
2ebda74f GC |
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> | |
2ebda74f | 18 | #include <net/netlink.h> |
0a742389 HX |
19 | |
20 | #include "compress.h" | |
21 | ||
22 | struct crypto_scomp; | |
2ebda74f | 23 | |
1ab53a77 GC |
24 | static const struct crypto_type crypto_acomp_type; |
25 | ||
0a742389 HX |
26 | static inline struct acomp_alg *__crypto_acomp_alg(struct crypto_alg *alg) |
27 | { | |
28 | return container_of(alg, struct acomp_alg, calg.base); | |
29 | } | |
30 | ||
31 | static inline struct acomp_alg *crypto_acomp_alg(struct crypto_acomp *tfm) | |
32 | { | |
33 | return __crypto_acomp_alg(crypto_acomp_tfm(tfm)->__crt_alg); | |
34 | } | |
35 | ||
c0f9e01d HX |
36 | static int __maybe_unused crypto_acomp_report( |
37 | struct sk_buff *skb, struct crypto_alg *alg) | |
2ebda74f GC |
38 | { |
39 | struct crypto_report_acomp racomp; | |
40 | ||
37db69e0 | 41 | memset(&racomp, 0, sizeof(racomp)); |
2ebda74f | 42 | |
37db69e0 | 43 | strscpy(racomp.type, "acomp", sizeof(racomp.type)); |
2ebda74f | 44 | |
37db69e0 | 45 | return nla_put(skb, CRYPTOCFGA_REPORT_ACOMP, sizeof(racomp), &racomp); |
2ebda74f | 46 | } |
2ebda74f GC |
47 | |
48 | static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg) | |
d8c34b94 | 49 | __maybe_unused; |
2ebda74f GC |
50 | |
51 | static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg) | |
52 | { | |
53 | seq_puts(m, "type : acomp\n"); | |
54 | } | |
55 | ||
56 | static void crypto_acomp_exit_tfm(struct crypto_tfm *tfm) | |
57 | { | |
58 | struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm); | |
59 | struct acomp_alg *alg = crypto_acomp_alg(acomp); | |
60 | ||
61 | alg->exit(acomp); | |
62 | } | |
63 | ||
64 | static int crypto_acomp_init_tfm(struct crypto_tfm *tfm) | |
65 | { | |
66 | struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm); | |
67 | struct acomp_alg *alg = crypto_acomp_alg(acomp); | |
68 | ||
1ab53a77 GC |
69 | if (tfm->__crt_alg->cra_type != &crypto_acomp_type) |
70 | return crypto_init_scomp_ops_async(tfm); | |
71 | ||
72 | acomp->compress = alg->compress; | |
73 | acomp->decompress = alg->decompress; | |
74 | acomp->dst_free = alg->dst_free; | |
75 | acomp->reqsize = alg->reqsize; | |
76 | ||
2ebda74f GC |
77 | if (alg->exit) |
78 | acomp->base.exit = crypto_acomp_exit_tfm; | |
79 | ||
80 | if (alg->init) | |
81 | return alg->init(acomp); | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
1ab53a77 GC |
86 | static unsigned int crypto_acomp_extsize(struct crypto_alg *alg) |
87 | { | |
88 | int extsize = crypto_alg_extsize(alg); | |
89 | ||
90 | if (alg->cra_type != &crypto_acomp_type) | |
91 | extsize += sizeof(struct crypto_scomp *); | |
92 | ||
93 | return extsize; | |
94 | } | |
95 | ||
2ebda74f | 96 | static const struct crypto_type crypto_acomp_type = { |
1ab53a77 | 97 | .extsize = crypto_acomp_extsize, |
2ebda74f GC |
98 | .init_tfm = crypto_acomp_init_tfm, |
99 | #ifdef CONFIG_PROC_FS | |
100 | .show = crypto_acomp_show, | |
101 | #endif | |
b8969a1b | 102 | #if IS_ENABLED(CONFIG_CRYPTO_USER) |
2ebda74f | 103 | .report = crypto_acomp_report, |
0a742389 | 104 | #endif |
2ebda74f | 105 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
1ab53a77 | 106 | .maskset = CRYPTO_ALG_TYPE_ACOMPRESS_MASK, |
2ebda74f GC |
107 | .type = CRYPTO_ALG_TYPE_ACOMPRESS, |
108 | .tfmsize = offsetof(struct crypto_acomp, base), | |
109 | }; | |
110 | ||
111 | struct crypto_acomp *crypto_alloc_acomp(const char *alg_name, u32 type, | |
112 | u32 mask) | |
113 | { | |
114 | return crypto_alloc_tfm(alg_name, &crypto_acomp_type, type, mask); | |
115 | } | |
116 | EXPORT_SYMBOL_GPL(crypto_alloc_acomp); | |
117 | ||
7bc13b5b BS |
118 | struct crypto_acomp *crypto_alloc_acomp_node(const char *alg_name, u32 type, |
119 | u32 mask, int node) | |
120 | { | |
121 | return crypto_alloc_tfm_node(alg_name, &crypto_acomp_type, type, mask, | |
122 | node); | |
123 | } | |
124 | EXPORT_SYMBOL_GPL(crypto_alloc_acomp_node); | |
125 | ||
1ab53a77 GC |
126 | struct acomp_req *acomp_request_alloc(struct crypto_acomp *acomp) |
127 | { | |
128 | struct crypto_tfm *tfm = crypto_acomp_tfm(acomp); | |
129 | struct acomp_req *req; | |
130 | ||
131 | req = __acomp_request_alloc(acomp); | |
132 | if (req && (tfm->__crt_alg->cra_type != &crypto_acomp_type)) | |
133 | return crypto_acomp_scomp_alloc_ctx(req); | |
134 | ||
135 | return req; | |
136 | } | |
137 | EXPORT_SYMBOL_GPL(acomp_request_alloc); | |
138 | ||
139 | void acomp_request_free(struct acomp_req *req) | |
140 | { | |
141 | struct crypto_acomp *acomp = crypto_acomp_reqtfm(req); | |
142 | struct crypto_tfm *tfm = crypto_acomp_tfm(acomp); | |
143 | ||
144 | if (tfm->__crt_alg->cra_type != &crypto_acomp_type) | |
145 | crypto_acomp_scomp_free_ctx(req); | |
146 | ||
147 | if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) { | |
148 | acomp->dst_free(req->dst); | |
149 | req->dst = NULL; | |
150 | } | |
151 | ||
152 | __acomp_request_free(req); | |
153 | } | |
154 | EXPORT_SYMBOL_GPL(acomp_request_free); | |
155 | ||
0a742389 | 156 | void comp_prepare_alg(struct comp_alg_common *alg) |
2ebda74f GC |
157 | { |
158 | struct crypto_alg *base = &alg->base; | |
159 | ||
2ebda74f | 160 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; |
0a742389 HX |
161 | } |
162 | ||
163 | int crypto_register_acomp(struct acomp_alg *alg) | |
164 | { | |
165 | struct crypto_alg *base = &alg->calg.base; | |
166 | ||
167 | comp_prepare_alg(&alg->calg); | |
168 | ||
169 | base->cra_type = &crypto_acomp_type; | |
2ebda74f GC |
170 | base->cra_flags |= CRYPTO_ALG_TYPE_ACOMPRESS; |
171 | ||
172 | return crypto_register_alg(base); | |
173 | } | |
174 | EXPORT_SYMBOL_GPL(crypto_register_acomp); | |
175 | ||
c6d633a9 | 176 | void crypto_unregister_acomp(struct acomp_alg *alg) |
2ebda74f | 177 | { |
c6d633a9 | 178 | crypto_unregister_alg(&alg->base); |
2ebda74f GC |
179 | } |
180 | EXPORT_SYMBOL_GPL(crypto_unregister_acomp); | |
181 | ||
3ce5bc72 GC |
182 | int crypto_register_acomps(struct acomp_alg *algs, int count) |
183 | { | |
184 | int i, ret; | |
185 | ||
186 | for (i = 0; i < count; i++) { | |
187 | ret = crypto_register_acomp(&algs[i]); | |
188 | if (ret) | |
189 | goto err; | |
190 | } | |
191 | ||
192 | return 0; | |
193 | ||
194 | err: | |
195 | for (--i; i >= 0; --i) | |
196 | crypto_unregister_acomp(&algs[i]); | |
197 | ||
198 | return ret; | |
199 | } | |
200 | EXPORT_SYMBOL_GPL(crypto_register_acomps); | |
201 | ||
202 | void crypto_unregister_acomps(struct acomp_alg *algs, int count) | |
203 | { | |
204 | int i; | |
205 | ||
206 | for (i = count - 1; i >= 0; --i) | |
207 | crypto_unregister_acomp(&algs[i]); | |
208 | } | |
209 | EXPORT_SYMBOL_GPL(crypto_unregister_acomps); | |
210 | ||
2ebda74f GC |
211 | MODULE_LICENSE("GPL"); |
212 | MODULE_DESCRIPTION("Asynchronous compression type"); |