1 // SPDX-License-Identifier: GPL-2.0-only 1 // SPDX-License-Identifier: GPL-2.0-only
2 /* 2 /*
3 * Cryptographic API. 3 * Cryptographic API.
4 */ 4 */
5 5
6 #include <linux/init.h> 6 #include <linux/init.h>
7 #include <linux/module.h> 7 #include <linux/module.h>
8 #include <linux/crypto.h> 8 #include <linux/crypto.h>
9 #include <linux/vmalloc.h> 9 #include <linux/vmalloc.h>
10 #include <linux/mm.h> 10 #include <linux/mm.h>
11 #include <linux/lzo.h> 11 #include <linux/lzo.h>
12 #include <crypto/internal/scompress.h> 12 #include <crypto/internal/scompress.h>
13 13
14 struct lzorle_ctx { 14 struct lzorle_ctx {
15 void *lzorle_comp_mem; 15 void *lzorle_comp_mem;
16 }; 16 };
17 17
18 static void *lzorle_alloc_ctx(struct crypto_sc 18 static void *lzorle_alloc_ctx(struct crypto_scomp *tfm)
19 { 19 {
20 void *ctx; 20 void *ctx;
21 21
22 ctx = kvmalloc(LZO1X_MEM_COMPRESS, GFP 22 ctx = kvmalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
23 if (!ctx) 23 if (!ctx)
24 return ERR_PTR(-ENOMEM); 24 return ERR_PTR(-ENOMEM);
25 25
26 return ctx; 26 return ctx;
27 } 27 }
28 28
29 static int lzorle_init(struct crypto_tfm *tfm) 29 static int lzorle_init(struct crypto_tfm *tfm)
30 { 30 {
31 struct lzorle_ctx *ctx = crypto_tfm_ct 31 struct lzorle_ctx *ctx = crypto_tfm_ctx(tfm);
32 32
33 ctx->lzorle_comp_mem = lzorle_alloc_ct 33 ctx->lzorle_comp_mem = lzorle_alloc_ctx(NULL);
34 if (IS_ERR(ctx->lzorle_comp_mem)) 34 if (IS_ERR(ctx->lzorle_comp_mem))
35 return -ENOMEM; 35 return -ENOMEM;
36 36
37 return 0; 37 return 0;
38 } 38 }
39 39
40 static void lzorle_free_ctx(struct crypto_scom 40 static void lzorle_free_ctx(struct crypto_scomp *tfm, void *ctx)
41 { 41 {
42 kvfree(ctx); 42 kvfree(ctx);
43 } 43 }
44 44
45 static void lzorle_exit(struct crypto_tfm *tfm 45 static void lzorle_exit(struct crypto_tfm *tfm)
46 { 46 {
47 struct lzorle_ctx *ctx = crypto_tfm_ct 47 struct lzorle_ctx *ctx = crypto_tfm_ctx(tfm);
48 48
49 lzorle_free_ctx(NULL, ctx->lzorle_comp 49 lzorle_free_ctx(NULL, ctx->lzorle_comp_mem);
50 } 50 }
51 51
52 static int __lzorle_compress(const u8 *src, un 52 static int __lzorle_compress(const u8 *src, unsigned int slen,
53 u8 *dst, unsigned in 53 u8 *dst, unsigned int *dlen, void *ctx)
54 { 54 {
55 size_t tmp_len = *dlen; /* size_t(ulon 55 size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */
56 int err; 56 int err;
57 57
58 err = lzorle1x_1_compress(src, slen, d 58 err = lzorle1x_1_compress(src, slen, dst, &tmp_len, ctx);
59 59
60 if (err != LZO_E_OK) 60 if (err != LZO_E_OK)
61 return -EINVAL; 61 return -EINVAL;
62 62
63 *dlen = tmp_len; 63 *dlen = tmp_len;
64 return 0; 64 return 0;
65 } 65 }
66 66
67 static int lzorle_compress(struct crypto_tfm * 67 static int lzorle_compress(struct crypto_tfm *tfm, const u8 *src,
68 unsigned int slen, u8 68 unsigned int slen, u8 *dst, unsigned int *dlen)
69 { 69 {
70 struct lzorle_ctx *ctx = crypto_tfm_ct 70 struct lzorle_ctx *ctx = crypto_tfm_ctx(tfm);
71 71
72 return __lzorle_compress(src, slen, ds 72 return __lzorle_compress(src, slen, dst, dlen, ctx->lzorle_comp_mem);
73 } 73 }
74 74
75 static int lzorle_scompress(struct crypto_scom 75 static int lzorle_scompress(struct crypto_scomp *tfm, const u8 *src,
76 unsigned int slen, u8 76 unsigned int slen, u8 *dst, unsigned int *dlen,
77 void *ctx) 77 void *ctx)
78 { 78 {
79 return __lzorle_compress(src, slen, ds 79 return __lzorle_compress(src, slen, dst, dlen, ctx);
80 } 80 }
81 81
82 static int __lzorle_decompress(const u8 *src, 82 static int __lzorle_decompress(const u8 *src, unsigned int slen,
83 u8 *dst, unsigned 83 u8 *dst, unsigned int *dlen)
84 { 84 {
85 int err; 85 int err;
86 size_t tmp_len = *dlen; /* size_t(ulon 86 size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */
87 87
88 err = lzo1x_decompress_safe(src, slen, 88 err = lzo1x_decompress_safe(src, slen, dst, &tmp_len);
89 89
90 if (err != LZO_E_OK) 90 if (err != LZO_E_OK)
91 return -EINVAL; 91 return -EINVAL;
92 92
93 *dlen = tmp_len; 93 *dlen = tmp_len;
94 return 0; 94 return 0;
95 } 95 }
96 96
97 static int lzorle_decompress(struct crypto_tfm 97 static int lzorle_decompress(struct crypto_tfm *tfm, const u8 *src,
98 unsigned int slen, u 98 unsigned int slen, u8 *dst, unsigned int *dlen)
99 { 99 {
100 return __lzorle_decompress(src, slen, 100 return __lzorle_decompress(src, slen, dst, dlen);
101 } 101 }
102 102
103 static int lzorle_sdecompress(struct crypto_sc 103 static int lzorle_sdecompress(struct crypto_scomp *tfm, const u8 *src,
104 unsigned int slen, 104 unsigned int slen, u8 *dst, unsigned int *dlen,
105 void *ctx) 105 void *ctx)
106 { 106 {
107 return __lzorle_decompress(src, slen, 107 return __lzorle_decompress(src, slen, dst, dlen);
108 } 108 }
109 109
110 static struct crypto_alg alg = { 110 static struct crypto_alg alg = {
111 .cra_name = "lzo-rle", 111 .cra_name = "lzo-rle",
112 .cra_driver_name = "lzo-rle-gen 112 .cra_driver_name = "lzo-rle-generic",
113 .cra_flags = CRYPTO_ALG_T 113 .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
114 .cra_ctxsize = sizeof(struc 114 .cra_ctxsize = sizeof(struct lzorle_ctx),
115 .cra_module = THIS_MODULE, 115 .cra_module = THIS_MODULE,
116 .cra_init = lzorle_init, 116 .cra_init = lzorle_init,
117 .cra_exit = lzorle_exit, 117 .cra_exit = lzorle_exit,
118 .cra_u = { .compress 118 .cra_u = { .compress = {
119 .coa_compress = lzorle_compr 119 .coa_compress = lzorle_compress,
120 .coa_decompress = lzorle_decom 120 .coa_decompress = lzorle_decompress } }
121 }; 121 };
122 122
123 static struct scomp_alg scomp = { 123 static struct scomp_alg scomp = {
124 .alloc_ctx = lzorle_alloc 124 .alloc_ctx = lzorle_alloc_ctx,
125 .free_ctx = lzorle_free_ 125 .free_ctx = lzorle_free_ctx,
126 .compress = lzorle_scomp 126 .compress = lzorle_scompress,
127 .decompress = lzorle_sdeco 127 .decompress = lzorle_sdecompress,
128 .base = { 128 .base = {
129 .cra_name = "lzo-rle", 129 .cra_name = "lzo-rle",
130 .cra_driver_name = "lzo-rle-sc 130 .cra_driver_name = "lzo-rle-scomp",
131 .cra_module = THIS_MODULE 131 .cra_module = THIS_MODULE,
132 } 132 }
133 }; 133 };
134 134
135 static int __init lzorle_mod_init(void) 135 static int __init lzorle_mod_init(void)
136 { 136 {
137 int ret; 137 int ret;
138 138
139 ret = crypto_register_alg(&alg); 139 ret = crypto_register_alg(&alg);
140 if (ret) 140 if (ret)
141 return ret; 141 return ret;
142 142
143 ret = crypto_register_scomp(&scomp); 143 ret = crypto_register_scomp(&scomp);
144 if (ret) { 144 if (ret) {
145 crypto_unregister_alg(&alg); 145 crypto_unregister_alg(&alg);
146 return ret; 146 return ret;
147 } 147 }
148 148
149 return ret; 149 return ret;
150 } 150 }
151 151
152 static void __exit lzorle_mod_fini(void) 152 static void __exit lzorle_mod_fini(void)
153 { 153 {
154 crypto_unregister_alg(&alg); 154 crypto_unregister_alg(&alg);
155 crypto_unregister_scomp(&scomp); 155 crypto_unregister_scomp(&scomp);
156 } 156 }
157 157
158 subsys_initcall(lzorle_mod_init); 158 subsys_initcall(lzorle_mod_init);
159 module_exit(lzorle_mod_fini); 159 module_exit(lzorle_mod_fini);
160 160
161 MODULE_LICENSE("GPL"); 161 MODULE_LICENSE("GPL");
162 MODULE_DESCRIPTION("LZO-RLE Compression Algori 162 MODULE_DESCRIPTION("LZO-RLE Compression Algorithm");
163 MODULE_ALIAS_CRYPTO("lzo-rle"); 163 MODULE_ALIAS_CRYPTO("lzo-rle");
164 164
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.