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-rw-r--r--crypto/Makefile2
-rw-r--r--crypto/crct10dif_common.c (renamed from crypto/crct10dif.c)100
-rw-r--r--crypto/crct10dif_generic.c127
-rw-r--r--lib/crc-t10dif.c11
4 files changed, 140 insertions, 100 deletions
diff --git a/crypto/Makefile b/crypto/Makefile
index 2d5ed08a239f..80019ba8da3a 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -83,7 +83,7 @@ obj-$(CONFIG_CRYPTO_ZLIB) += zlib.o
83obj-$(CONFIG_CRYPTO_MICHAEL_MIC) += michael_mic.o 83obj-$(CONFIG_CRYPTO_MICHAEL_MIC) += michael_mic.o
84obj-$(CONFIG_CRYPTO_CRC32C) += crc32c.o 84obj-$(CONFIG_CRYPTO_CRC32C) += crc32c.o
85obj-$(CONFIG_CRYPTO_CRC32) += crc32.o 85obj-$(CONFIG_CRYPTO_CRC32) += crc32.o
86obj-$(CONFIG_CRYPTO_CRCT10DIF) += crct10dif.o 86obj-$(CONFIG_CRYPTO_CRCT10DIF) += crct10dif_common.o crct10dif_generic.o
87obj-$(CONFIG_CRYPTO_AUTHENC) += authenc.o authencesn.o 87obj-$(CONFIG_CRYPTO_AUTHENC) += authenc.o authencesn.o
88obj-$(CONFIG_CRYPTO_LZO) += lzo.o 88obj-$(CONFIG_CRYPTO_LZO) += lzo.o
89obj-$(CONFIG_CRYPTO_LZ4) += lz4.o 89obj-$(CONFIG_CRYPTO_LZ4) += lz4.o
diff --git a/crypto/crct10dif.c b/crypto/crct10dif_common.c
index 92aca96d6b98..b2fab366f518 100644
--- a/crypto/crct10dif.c
+++ b/crypto/crct10dif_common.c
@@ -24,18 +24,10 @@
24 * 24 *
25 */ 25 */
26 26
27#include <linux/types.h>
28#include <linux/module.h>
29#include <linux/crc-t10dif.h> 27#include <linux/crc-t10dif.h>
30#include <crypto/internal/hash.h> 28#include <linux/module.h>
31#include <linux/init.h>
32#include <linux/string.h>
33#include <linux/kernel.h> 29#include <linux/kernel.h>
34 30
35struct chksum_desc_ctx {
36 __u16 crc;
37};
38
39/* Table generated using the following polynomium: 31/* Table generated using the following polynomium:
40 * x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1 32 * x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1
41 * gt: 0x8bb7 33 * gt: 0x8bb7
@@ -86,93 +78,5 @@ __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len)
86} 78}
87EXPORT_SYMBOL(crc_t10dif_generic); 79EXPORT_SYMBOL(crc_t10dif_generic);
88 80
89/* 81MODULE_DESCRIPTION("T10 DIF CRC calculation common code");
90 * Steps through buffer one byte at at time, calculates reflected
91 * crc using table.
92 */
93
94static int chksum_init(struct shash_desc *desc)
95{
96 struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
97
98 ctx->crc = 0;
99
100 return 0;
101}
102
103static int chksum_update(struct shash_desc *desc, const u8 *data,
104 unsigned int length)
105{
106 struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
107
108 ctx->crc = crc_t10dif_generic(ctx->crc, data, length);
109 return 0;
110}
111
112static int chksum_final(struct shash_desc *desc, u8 *out)
113{
114 struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
115
116 *(__u16 *)out = ctx->crc;
117 return 0;
118}
119
120static int __chksum_finup(__u16 *crcp, const u8 *data, unsigned int len,
121 u8 *out)
122{
123 *(__u16 *)out = crc_t10dif_generic(*crcp, data, len);
124 return 0;
125}
126
127static int chksum_finup(struct shash_desc *desc, const u8 *data,
128 unsigned int len, u8 *out)
129{
130 struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
131
132 return __chksum_finup(&ctx->crc, data, len, out);
133}
134
135static int chksum_digest(struct shash_desc *desc, const u8 *data,
136 unsigned int length, u8 *out)
137{
138 struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
139
140 return __chksum_finup(&ctx->crc, data, length, out);
141}
142
143static struct shash_alg alg = {
144 .digestsize = CRC_T10DIF_DIGEST_SIZE,
145 .init = chksum_init,
146 .update = chksum_update,
147 .final = chksum_final,
148 .finup = chksum_finup,
149 .digest = chksum_digest,
150 .descsize = sizeof(struct chksum_desc_ctx),
151 .base = {
152 .cra_name = "crct10dif",
153 .cra_driver_name = "crct10dif-generic",
154 .cra_priority = 100,
155 .cra_blocksize = CRC_T10DIF_BLOCK_SIZE,
156 .cra_module = THIS_MODULE,
157 }
158};
159
160static int __init crct10dif_mod_init(void)
161{
162 int ret;
163
164 ret = crypto_register_shash(&alg);
165 return ret;
166}
167
168static void __exit crct10dif_mod_fini(void)
169{
170 crypto_unregister_shash(&alg);
171}
172
173module_init(crct10dif_mod_init);
174module_exit(crct10dif_mod_fini);
175
176MODULE_AUTHOR("Tim Chen <tim.c.chen@linux.intel.com>");
177MODULE_DESCRIPTION("T10 DIF CRC calculation.");
178MODULE_LICENSE("GPL"); 82MODULE_LICENSE("GPL");
diff --git a/crypto/crct10dif_generic.c b/crypto/crct10dif_generic.c
new file mode 100644
index 000000000000..877e7114ec5c
--- /dev/null
+++ b/crypto/crct10dif_generic.c
@@ -0,0 +1,127 @@
1/*
2 * Cryptographic API.
3 *
4 * T10 Data Integrity Field CRC16 Crypto Transform
5 *
6 * Copyright (c) 2007 Oracle Corporation. All rights reserved.
7 * Written by Martin K. Petersen <martin.petersen@oracle.com>
8 * Copyright (C) 2013 Intel Corporation
9 * Author: Tim Chen <tim.c.chen@linux.intel.com>
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the Free
13 * Software Foundation; either version 2 of the License, or (at your option)
14 * any later version.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
20 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 */
26
27#include <linux/module.h>
28#include <linux/crc-t10dif.h>
29#include <crypto/internal/hash.h>
30#include <linux/init.h>
31#include <linux/kernel.h>
32
33struct chksum_desc_ctx {
34 __u16 crc;
35};
36
37/*
38 * Steps through buffer one byte at at time, calculates reflected
39 * crc using table.
40 */
41
42static int chksum_init(struct shash_desc *desc)
43{
44 struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
45
46 ctx->crc = 0;
47
48 return 0;
49}
50
51static int chksum_update(struct shash_desc *desc, const u8 *data,
52 unsigned int length)
53{
54 struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
55
56 ctx->crc = crc_t10dif_generic(ctx->crc, data, length);
57 return 0;
58}
59
60static int chksum_final(struct shash_desc *desc, u8 *out)
61{
62 struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
63
64 *(__u16 *)out = ctx->crc;
65 return 0;
66}
67
68static int __chksum_finup(__u16 *crcp, const u8 *data, unsigned int len,
69 u8 *out)
70{
71 *(__u16 *)out = crc_t10dif_generic(*crcp, data, len);
72 return 0;
73}
74
75static int chksum_finup(struct shash_desc *desc, const u8 *data,
76 unsigned int len, u8 *out)
77{
78 struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
79
80 return __chksum_finup(&ctx->crc, data, len, out);
81}
82
83static int chksum_digest(struct shash_desc *desc, const u8 *data,
84 unsigned int length, u8 *out)
85{
86 struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
87
88 return __chksum_finup(&ctx->crc, data, length, out);
89}
90
91static struct shash_alg alg = {
92 .digestsize = CRC_T10DIF_DIGEST_SIZE,
93 .init = chksum_init,
94 .update = chksum_update,
95 .final = chksum_final,
96 .finup = chksum_finup,
97 .digest = chksum_digest,
98 .descsize = sizeof(struct chksum_desc_ctx),
99 .base = {
100 .cra_name = "crct10dif",
101 .cra_driver_name = "crct10dif-generic",
102 .cra_priority = 100,
103 .cra_blocksize = CRC_T10DIF_BLOCK_SIZE,
104 .cra_module = THIS_MODULE,
105 }
106};
107
108static int __init crct10dif_mod_init(void)
109{
110 int ret;
111
112 ret = crypto_register_shash(&alg);
113 return ret;
114}
115
116static void __exit crct10dif_mod_fini(void)
117{
118 crypto_unregister_shash(&alg);
119}
120
121module_init(crct10dif_mod_init);
122module_exit(crct10dif_mod_fini);
123
124MODULE_AUTHOR("Tim Chen <tim.c.chen@linux.intel.com>");
125MODULE_DESCRIPTION("T10 DIF CRC calculation.");
126MODULE_LICENSE("GPL");
127MODULE_ALIAS("crct10dif");
diff --git a/lib/crc-t10dif.c b/lib/crc-t10dif.c
index 43bc5b071f96..dfe6ec17c0a5 100644
--- a/lib/crc-t10dif.c
+++ b/lib/crc-t10dif.c
@@ -14,8 +14,10 @@
14#include <linux/err.h> 14#include <linux/err.h>
15#include <linux/init.h> 15#include <linux/init.h>
16#include <crypto/hash.h> 16#include <crypto/hash.h>
17#include <linux/static_key.h>
17 18
18static struct crypto_shash *crct10dif_tfm; 19static struct crypto_shash *crct10dif_tfm;
20static struct static_key crct10dif_fallback __read_mostly;
19 21
20__u16 crc_t10dif(const unsigned char *buffer, size_t len) 22__u16 crc_t10dif(const unsigned char *buffer, size_t len)
21{ 23{
@@ -25,6 +27,9 @@ __u16 crc_t10dif(const unsigned char *buffer, size_t len)
25 } desc; 27 } desc;
26 int err; 28 int err;
27 29
30 if (static_key_false(&crct10dif_fallback))
31 return crc_t10dif_generic(0, buffer, len);
32
28 desc.shash.tfm = crct10dif_tfm; 33 desc.shash.tfm = crct10dif_tfm;
29 desc.shash.flags = 0; 34 desc.shash.flags = 0;
30 *(__u16 *)desc.ctx = 0; 35 *(__u16 *)desc.ctx = 0;
@@ -39,7 +44,11 @@ EXPORT_SYMBOL(crc_t10dif);
39static int __init crc_t10dif_mod_init(void) 44static int __init crc_t10dif_mod_init(void)
40{ 45{
41 crct10dif_tfm = crypto_alloc_shash("crct10dif", 0, 0); 46 crct10dif_tfm = crypto_alloc_shash("crct10dif", 0, 0);
42 return PTR_RET(crct10dif_tfm); 47 if (IS_ERR(crct10dif_tfm)) {
48 static_key_slow_inc(&crct10dif_fallback);
49 crct10dif_tfm = NULL;
50 }
51 return 0;
43} 52}
44 53
45static void __exit crc_t10dif_mod_fini(void) 54static void __exit crc_t10dif_mod_fini(void)
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-31 14:27:23 -0400