1 | // SPDX-License-Identifier: GPL-2.0-or-later |
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> |
8 | */ |
9 | |
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> |
19 | |
20 | #include "compress.h" |
21 | |
22 | struct crypto_scomp; |
23 | |
24 | static const struct crypto_type crypto_acomp_type; |
25 | |
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(alg: crypto_acomp_tfm(tfm)->__crt_alg); |
34 | } |
35 | |
36 | static int __maybe_unused crypto_acomp_report( |
37 | struct sk_buff *skb, struct crypto_alg *alg) |
38 | { |
39 | struct crypto_report_acomp racomp; |
40 | |
41 | memset(&racomp, 0, sizeof(racomp)); |
42 | |
43 | strscpy(racomp.type, "acomp" , sizeof(racomp.type)); |
44 | |
45 | return nla_put(skb, attrtype: CRYPTOCFGA_REPORT_ACOMP, attrlen: sizeof(racomp), data: &racomp); |
46 | } |
47 | |
48 | static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg) |
49 | __maybe_unused; |
50 | |
51 | static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg) |
52 | { |
53 | seq_puts(m, s: "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(tfm: 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(tfm: acomp); |
68 | |
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 | |
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 | |
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 | |
96 | static inline int __crypto_acomp_report_stat(struct sk_buff *skb, |
97 | struct crypto_alg *alg) |
98 | { |
99 | struct comp_alg_common *calg = __crypto_comp_alg_common(alg); |
100 | struct crypto_istat_compress *istat = comp_get_stat(alg: calg); |
101 | struct crypto_stat_compress racomp; |
102 | |
103 | memset(&racomp, 0, sizeof(racomp)); |
104 | |
105 | strscpy(racomp.type, "acomp" , sizeof(racomp.type)); |
106 | racomp.stat_compress_cnt = atomic64_read(v: &istat->compress_cnt); |
107 | racomp.stat_compress_tlen = atomic64_read(v: &istat->compress_tlen); |
108 | racomp.stat_decompress_cnt = atomic64_read(v: &istat->decompress_cnt); |
109 | racomp.stat_decompress_tlen = atomic64_read(v: &istat->decompress_tlen); |
110 | racomp.stat_err_cnt = atomic64_read(v: &istat->err_cnt); |
111 | |
112 | return nla_put(skb, attrtype: CRYPTOCFGA_STAT_ACOMP, attrlen: sizeof(racomp), data: &racomp); |
113 | } |
114 | |
115 | #ifdef CONFIG_CRYPTO_STATS |
116 | int crypto_acomp_report_stat(struct sk_buff *skb, struct crypto_alg *alg) |
117 | { |
118 | return __crypto_acomp_report_stat(skb, alg); |
119 | } |
120 | #endif |
121 | |
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, |
127 | #endif |
128 | #if IS_ENABLED(CONFIG_CRYPTO_USER) |
129 | .report = crypto_acomp_report, |
130 | #endif |
131 | #ifdef CONFIG_CRYPTO_STATS |
132 | .report_stat = crypto_acomp_report_stat, |
133 | #endif |
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), |
138 | }; |
139 | |
140 | struct crypto_acomp *crypto_alloc_acomp(const char *alg_name, u32 type, |
141 | u32 mask) |
142 | { |
143 | return crypto_alloc_tfm(alg_name, frontend: &crypto_acomp_type, type, mask); |
144 | } |
145 | EXPORT_SYMBOL_GPL(crypto_alloc_acomp); |
146 | |
147 | struct crypto_acomp *crypto_alloc_acomp_node(const char *alg_name, u32 type, |
148 | u32 mask, int node) |
149 | { |
150 | return crypto_alloc_tfm_node(alg_name, frontend: &crypto_acomp_type, type, mask, |
151 | node); |
152 | } |
153 | EXPORT_SYMBOL_GPL(crypto_alloc_acomp_node); |
154 | |
155 | struct acomp_req *acomp_request_alloc(struct crypto_acomp *acomp) |
156 | { |
157 | struct crypto_tfm *tfm = crypto_acomp_tfm(tfm: acomp); |
158 | struct acomp_req *req; |
159 | |
160 | req = __acomp_request_alloc(tfm: acomp); |
161 | if (req && (tfm->__crt_alg->cra_type != &crypto_acomp_type)) |
162 | return crypto_acomp_scomp_alloc_ctx(req); |
163 | |
164 | return req; |
165 | } |
166 | EXPORT_SYMBOL_GPL(acomp_request_alloc); |
167 | |
168 | void acomp_request_free(struct acomp_req *req) |
169 | { |
170 | struct crypto_acomp *acomp = crypto_acomp_reqtfm(req); |
171 | struct crypto_tfm *tfm = crypto_acomp_tfm(tfm: acomp); |
172 | |
173 | if (tfm->__crt_alg->cra_type != &crypto_acomp_type) |
174 | crypto_acomp_scomp_free_ctx(req); |
175 | |
176 | if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) { |
177 | acomp->dst_free(req->dst); |
178 | req->dst = NULL; |
179 | } |
180 | |
181 | __acomp_request_free(req); |
182 | } |
183 | EXPORT_SYMBOL_GPL(acomp_request_free); |
184 | |
185 | void comp_prepare_alg(struct comp_alg_common *alg) |
186 | { |
187 | struct crypto_istat_compress *istat = comp_get_stat(alg); |
188 | struct crypto_alg *base = &alg->base; |
189 | |
190 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; |
191 | |
192 | if (IS_ENABLED(CONFIG_CRYPTO_STATS)) |
193 | memset(istat, 0, sizeof(*istat)); |
194 | } |
195 | |
196 | int crypto_register_acomp(struct acomp_alg *alg) |
197 | { |
198 | struct crypto_alg *base = &alg->calg.base; |
199 | |
200 | comp_prepare_alg(alg: &alg->calg); |
201 | |
202 | base->cra_type = &crypto_acomp_type; |
203 | base->cra_flags |= CRYPTO_ALG_TYPE_ACOMPRESS; |
204 | |
205 | return crypto_register_alg(alg: base); |
206 | } |
207 | EXPORT_SYMBOL_GPL(crypto_register_acomp); |
208 | |
209 | void crypto_unregister_acomp(struct acomp_alg *alg) |
210 | { |
211 | crypto_unregister_alg(alg: &alg->base); |
212 | } |
213 | EXPORT_SYMBOL_GPL(crypto_unregister_acomp); |
214 | |
215 | int crypto_register_acomps(struct acomp_alg *algs, int count) |
216 | { |
217 | int i, ret; |
218 | |
219 | for (i = 0; i < count; i++) { |
220 | ret = crypto_register_acomp(&algs[i]); |
221 | if (ret) |
222 | goto err; |
223 | } |
224 | |
225 | return 0; |
226 | |
227 | err: |
228 | for (--i; i >= 0; --i) |
229 | crypto_unregister_acomp(&algs[i]); |
230 | |
231 | return ret; |
232 | } |
233 | EXPORT_SYMBOL_GPL(crypto_register_acomps); |
234 | |
235 | void crypto_unregister_acomps(struct acomp_alg *algs, int count) |
236 | { |
237 | int i; |
238 | |
239 | for (i = count - 1; i >= 0; --i) |
240 | crypto_unregister_acomp(&algs[i]); |
241 | } |
242 | EXPORT_SYMBOL_GPL(crypto_unregister_acomps); |
243 | |
244 | MODULE_LICENSE("GPL" ); |
245 | MODULE_DESCRIPTION("Asynchronous compression type" ); |
246 | |