| 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(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, CRYPTOCFGA_REPORT_ACOMP, sizeof(racomp), &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, "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 | |
| 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(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(&istat->compress_cnt); |
| 107 | racomp.stat_compress_tlen = atomic64_read(&istat->compress_tlen); |
| 108 | racomp.stat_decompress_cnt = atomic64_read(&istat->decompress_cnt); |
| 109 | racomp.stat_decompress_tlen = atomic64_read(&istat->decompress_tlen); |
| 110 | racomp.stat_err_cnt = atomic64_read(&istat->err_cnt); |
| 111 | |
| 112 | return nla_put(skb, CRYPTOCFGA_STAT_ACOMP, sizeof(racomp), &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, &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, &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(acomp); |
| 158 | struct acomp_req *req; |
| 159 | |
| 160 | req = __acomp_request_alloc(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(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->calg); |
| 201 | |
| 202 | base->cra_type = &crypto_acomp_type; |
| 203 | base->cra_flags |= CRYPTO_ALG_TYPE_ACOMPRESS; |
| 204 | |
| 205 | return crypto_register_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->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"); |