1 // SPDX-License-Identifier: GPL-2.0-only <<
2 /* 1 /*
3 * Cryptographic API. 2 * Cryptographic API.
4 * 3 *
5 * Copyright (c) 2013 Chanho Min <chanho.min@l 4 * Copyright (c) 2013 Chanho Min <chanho.min@lge.com>
>> 5 *
>> 6 * This program is free software; you can redistribute it and/or modify it
>> 7 * under the terms of the GNU General Public License version 2 as published by
>> 8 * the Free Software Foundation.
>> 9 *
>> 10 * This program is distributed in the hope that it will be useful, but WITHOUT
>> 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
>> 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
>> 13 * more details.
>> 14 *
>> 15 * You should have received a copy of the GNU General Public License along with
>> 16 * this program; if not, write to the Free Software Foundation, Inc., 51
>> 17 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
>> 18 *
6 */ 19 */
7 #include <linux/init.h> 20 #include <linux/init.h>
8 #include <linux/module.h> 21 #include <linux/module.h>
9 #include <linux/crypto.h> 22 #include <linux/crypto.h>
10 #include <linux/vmalloc.h> 23 #include <linux/vmalloc.h>
11 #include <linux/lz4.h> 24 #include <linux/lz4.h>
12 #include <crypto/internal/scompress.h> 25 #include <crypto/internal/scompress.h>
13 26
14 struct lz4hc_ctx { 27 struct lz4hc_ctx {
15 void *lz4hc_comp_mem; 28 void *lz4hc_comp_mem;
16 }; 29 };
17 30
18 static void *lz4hc_alloc_ctx(struct crypto_sco 31 static void *lz4hc_alloc_ctx(struct crypto_scomp *tfm)
19 { 32 {
20 void *ctx; 33 void *ctx;
21 34
22 ctx = vmalloc(LZ4HC_MEM_COMPRESS); 35 ctx = vmalloc(LZ4HC_MEM_COMPRESS);
23 if (!ctx) 36 if (!ctx)
24 return ERR_PTR(-ENOMEM); 37 return ERR_PTR(-ENOMEM);
25 38
26 return ctx; 39 return ctx;
27 } 40 }
28 41
29 static int lz4hc_init(struct crypto_tfm *tfm) 42 static int lz4hc_init(struct crypto_tfm *tfm)
30 { 43 {
31 struct lz4hc_ctx *ctx = crypto_tfm_ctx 44 struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
32 45
33 ctx->lz4hc_comp_mem = lz4hc_alloc_ctx( 46 ctx->lz4hc_comp_mem = lz4hc_alloc_ctx(NULL);
34 if (IS_ERR(ctx->lz4hc_comp_mem)) 47 if (IS_ERR(ctx->lz4hc_comp_mem))
35 return -ENOMEM; 48 return -ENOMEM;
36 49
37 return 0; 50 return 0;
38 } 51 }
39 52
40 static void lz4hc_free_ctx(struct crypto_scomp 53 static void lz4hc_free_ctx(struct crypto_scomp *tfm, void *ctx)
41 { 54 {
42 vfree(ctx); 55 vfree(ctx);
43 } 56 }
44 57
45 static void lz4hc_exit(struct crypto_tfm *tfm) 58 static void lz4hc_exit(struct crypto_tfm *tfm)
46 { 59 {
47 struct lz4hc_ctx *ctx = crypto_tfm_ctx 60 struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
48 61
49 lz4hc_free_ctx(NULL, ctx->lz4hc_comp_m 62 lz4hc_free_ctx(NULL, ctx->lz4hc_comp_mem);
50 } 63 }
51 64
52 static int __lz4hc_compress_crypto(const u8 *s 65 static int __lz4hc_compress_crypto(const u8 *src, unsigned int slen,
53 u8 *dst, un 66 u8 *dst, unsigned int *dlen, void *ctx)
54 { 67 {
55 int out_len = LZ4_compress_HC(src, dst 68 int out_len = LZ4_compress_HC(src, dst, slen,
56 *dlen, LZ4HC_DEFAULT_CLEVEL, c 69 *dlen, LZ4HC_DEFAULT_CLEVEL, ctx);
57 70
58 if (!out_len) 71 if (!out_len)
59 return -EINVAL; 72 return -EINVAL;
60 73
61 *dlen = out_len; 74 *dlen = out_len;
62 return 0; 75 return 0;
63 } 76 }
64 77
65 static int lz4hc_scompress(struct crypto_scomp 78 static int lz4hc_scompress(struct crypto_scomp *tfm, const u8 *src,
66 unsigned int slen, 79 unsigned int slen, u8 *dst, unsigned int *dlen,
67 void *ctx) 80 void *ctx)
68 { 81 {
69 return __lz4hc_compress_crypto(src, sl 82 return __lz4hc_compress_crypto(src, slen, dst, dlen, ctx);
70 } 83 }
71 84
72 static int lz4hc_compress_crypto(struct crypto 85 static int lz4hc_compress_crypto(struct crypto_tfm *tfm, const u8 *src,
73 unsigned int 86 unsigned int slen, u8 *dst,
74 unsigned int 87 unsigned int *dlen)
75 { 88 {
76 struct lz4hc_ctx *ctx = crypto_tfm_ctx 89 struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
77 90
78 return __lz4hc_compress_crypto(src, sl 91 return __lz4hc_compress_crypto(src, slen, dst, dlen,
79 ctx->l 92 ctx->lz4hc_comp_mem);
80 } 93 }
81 94
82 static int __lz4hc_decompress_crypto(const u8 95 static int __lz4hc_decompress_crypto(const u8 *src, unsigned int slen,
83 u8 *dst, 96 u8 *dst, unsigned int *dlen, void *ctx)
84 { 97 {
85 int out_len = LZ4_decompress_safe(src, 98 int out_len = LZ4_decompress_safe(src, dst, slen, *dlen);
86 99
87 if (out_len < 0) 100 if (out_len < 0)
88 return -EINVAL; !! 101 return out_len;
89 102
90 *dlen = out_len; 103 *dlen = out_len;
91 return 0; 104 return 0;
92 } 105 }
93 106
94 static int lz4hc_sdecompress(struct crypto_sco 107 static int lz4hc_sdecompress(struct crypto_scomp *tfm, const u8 *src,
95 unsigned int slen 108 unsigned int slen, u8 *dst, unsigned int *dlen,
96 void *ctx) 109 void *ctx)
97 { 110 {
98 return __lz4hc_decompress_crypto(src, 111 return __lz4hc_decompress_crypto(src, slen, dst, dlen, NULL);
99 } 112 }
100 113
101 static int lz4hc_decompress_crypto(struct cryp 114 static int lz4hc_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
102 unsigned in 115 unsigned int slen, u8 *dst,
103 unsigned in 116 unsigned int *dlen)
104 { 117 {
105 return __lz4hc_decompress_crypto(src, 118 return __lz4hc_decompress_crypto(src, slen, dst, dlen, NULL);
106 } 119 }
107 120
108 static struct crypto_alg alg_lz4hc = { 121 static struct crypto_alg alg_lz4hc = {
109 .cra_name = "lz4hc", 122 .cra_name = "lz4hc",
110 .cra_driver_name = "lz4hc-gener <<
111 .cra_flags = CRYPTO_ALG_T 123 .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
112 .cra_ctxsize = sizeof(struc 124 .cra_ctxsize = sizeof(struct lz4hc_ctx),
113 .cra_module = THIS_MODULE, 125 .cra_module = THIS_MODULE,
>> 126 .cra_list = LIST_HEAD_INIT(alg_lz4hc.cra_list),
114 .cra_init = lz4hc_init, 127 .cra_init = lz4hc_init,
115 .cra_exit = lz4hc_exit, 128 .cra_exit = lz4hc_exit,
116 .cra_u = { .compress 129 .cra_u = { .compress = {
117 .coa_compress = lz4hc_compre 130 .coa_compress = lz4hc_compress_crypto,
118 .coa_decompress = lz4hc_decomp 131 .coa_decompress = lz4hc_decompress_crypto } }
119 }; 132 };
120 133
121 static struct scomp_alg scomp = { 134 static struct scomp_alg scomp = {
122 .alloc_ctx = lz4hc_alloc_ 135 .alloc_ctx = lz4hc_alloc_ctx,
123 .free_ctx = lz4hc_free_c 136 .free_ctx = lz4hc_free_ctx,
124 .compress = lz4hc_scompr 137 .compress = lz4hc_scompress,
125 .decompress = lz4hc_sdecom 138 .decompress = lz4hc_sdecompress,
126 .base = { 139 .base = {
127 .cra_name = "lz4hc", 140 .cra_name = "lz4hc",
128 .cra_driver_name = "lz4hc-scom 141 .cra_driver_name = "lz4hc-scomp",
129 .cra_module = THIS_MODULE 142 .cra_module = THIS_MODULE,
130 } 143 }
131 }; 144 };
132 145
133 static int __init lz4hc_mod_init(void) 146 static int __init lz4hc_mod_init(void)
134 { 147 {
135 int ret; 148 int ret;
136 149
137 ret = crypto_register_alg(&alg_lz4hc); 150 ret = crypto_register_alg(&alg_lz4hc);
138 if (ret) 151 if (ret)
139 return ret; 152 return ret;
140 153
141 ret = crypto_register_scomp(&scomp); 154 ret = crypto_register_scomp(&scomp);
142 if (ret) { 155 if (ret) {
143 crypto_unregister_alg(&alg_lz4 156 crypto_unregister_alg(&alg_lz4hc);
144 return ret; 157 return ret;
145 } 158 }
146 159
147 return ret; 160 return ret;
148 } 161 }
149 162
150 static void __exit lz4hc_mod_fini(void) 163 static void __exit lz4hc_mod_fini(void)
151 { 164 {
152 crypto_unregister_alg(&alg_lz4hc); 165 crypto_unregister_alg(&alg_lz4hc);
153 crypto_unregister_scomp(&scomp); 166 crypto_unregister_scomp(&scomp);
154 } 167 }
155 168
156 subsys_initcall(lz4hc_mod_init); !! 169 module_init(lz4hc_mod_init);
157 module_exit(lz4hc_mod_fini); 170 module_exit(lz4hc_mod_fini);
158 171
159 MODULE_LICENSE("GPL"); 172 MODULE_LICENSE("GPL");
160 MODULE_DESCRIPTION("LZ4HC Compression Algorith 173 MODULE_DESCRIPTION("LZ4HC Compression Algorithm");
161 MODULE_ALIAS_CRYPTO("lz4hc"); 174 MODULE_ALIAS_CRYPTO("lz4hc");
162 175
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