Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Nick Terrell | 1108 | 99.19% | 1 | 20.00% |
Eric Biggers | 6 | 0.54% | 2 | 40.00% |
Thomas Gleixner | 2 | 0.18% | 1 | 20.00% |
Waiman Long | 1 | 0.09% | 1 | 20.00% |
Total | 1117 | 5 |
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258
// SPDX-License-Identifier: GPL-2.0-only /* * Cryptographic API. * * Copyright (c) 2017-present, Facebook, Inc. */ #include <linux/crypto.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/mm.h> #include <linux/module.h> #include <linux/net.h> #include <linux/vmalloc.h> #include <linux/zstd.h> #include <crypto/internal/scompress.h> #define ZSTD_DEF_LEVEL 3 struct zstd_ctx { ZSTD_CCtx *cctx; ZSTD_DCtx *dctx; void *cwksp; void *dwksp; }; static ZSTD_parameters zstd_params(void) { return ZSTD_getParams(ZSTD_DEF_LEVEL, 0, 0); } static int zstd_comp_init(struct zstd_ctx *ctx) { int ret = 0; const ZSTD_parameters params = zstd_params(); const size_t wksp_size = ZSTD_CCtxWorkspaceBound(params.cParams); ctx->cwksp = vzalloc(wksp_size); if (!ctx->cwksp) { ret = -ENOMEM; goto out; } ctx->cctx = ZSTD_initCCtx(ctx->cwksp, wksp_size); if (!ctx->cctx) { ret = -EINVAL; goto out_free; } out: return ret; out_free: vfree(ctx->cwksp); goto out; } static int zstd_decomp_init(struct zstd_ctx *ctx) { int ret = 0; const size_t wksp_size = ZSTD_DCtxWorkspaceBound(); ctx->dwksp = vzalloc(wksp_size); if (!ctx->dwksp) { ret = -ENOMEM; goto out; } ctx->dctx = ZSTD_initDCtx(ctx->dwksp, wksp_size); if (!ctx->dctx) { ret = -EINVAL; goto out_free; } out: return ret; out_free: vfree(ctx->dwksp); goto out; } static void zstd_comp_exit(struct zstd_ctx *ctx) { vfree(ctx->cwksp); ctx->cwksp = NULL; ctx->cctx = NULL; } static void zstd_decomp_exit(struct zstd_ctx *ctx) { vfree(ctx->dwksp); ctx->dwksp = NULL; ctx->dctx = NULL; } static int __zstd_init(void *ctx) { int ret; ret = zstd_comp_init(ctx); if (ret) return ret; ret = zstd_decomp_init(ctx); if (ret) zstd_comp_exit(ctx); return ret; } static void *zstd_alloc_ctx(struct crypto_scomp *tfm) { int ret; struct zstd_ctx *ctx; ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); if (!ctx) return ERR_PTR(-ENOMEM); ret = __zstd_init(ctx); if (ret) { kfree(ctx); return ERR_PTR(ret); } return ctx; } static int zstd_init(struct crypto_tfm *tfm) { struct zstd_ctx *ctx = crypto_tfm_ctx(tfm); return __zstd_init(ctx); } static void __zstd_exit(void *ctx) { zstd_comp_exit(ctx); zstd_decomp_exit(ctx); } static void zstd_free_ctx(struct crypto_scomp *tfm, void *ctx) { __zstd_exit(ctx); kfree_sensitive(ctx); } static void zstd_exit(struct crypto_tfm *tfm) { struct zstd_ctx *ctx = crypto_tfm_ctx(tfm); __zstd_exit(ctx); } static int __zstd_compress(const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen, void *ctx) { size_t out_len; struct zstd_ctx *zctx = ctx; const ZSTD_parameters params = zstd_params(); out_len = ZSTD_compressCCtx(zctx->cctx, dst, *dlen, src, slen, params); if (ZSTD_isError(out_len)) return -EINVAL; *dlen = out_len; return 0; } static int zstd_compress(struct crypto_tfm *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen) { struct zstd_ctx *ctx = crypto_tfm_ctx(tfm); return __zstd_compress(src, slen, dst, dlen, ctx); } static int zstd_scompress(struct crypto_scomp *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen, void *ctx) { return __zstd_compress(src, slen, dst, dlen, ctx); } static int __zstd_decompress(const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen, void *ctx) { size_t out_len; struct zstd_ctx *zctx = ctx; out_len = ZSTD_decompressDCtx(zctx->dctx, dst, *dlen, src, slen); if (ZSTD_isError(out_len)) return -EINVAL; *dlen = out_len; return 0; } static int zstd_decompress(struct crypto_tfm *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen) { struct zstd_ctx *ctx = crypto_tfm_ctx(tfm); return __zstd_decompress(src, slen, dst, dlen, ctx); } static int zstd_sdecompress(struct crypto_scomp *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen, void *ctx) { return __zstd_decompress(src, slen, dst, dlen, ctx); } static struct crypto_alg alg = { .cra_name = "zstd", .cra_driver_name = "zstd-generic", .cra_flags = CRYPTO_ALG_TYPE_COMPRESS, .cra_ctxsize = sizeof(struct zstd_ctx), .cra_module = THIS_MODULE, .cra_init = zstd_init, .cra_exit = zstd_exit, .cra_u = { .compress = { .coa_compress = zstd_compress, .coa_decompress = zstd_decompress } } }; static struct scomp_alg scomp = { .alloc_ctx = zstd_alloc_ctx, .free_ctx = zstd_free_ctx, .compress = zstd_scompress, .decompress = zstd_sdecompress, .base = { .cra_name = "zstd", .cra_driver_name = "zstd-scomp", .cra_module = THIS_MODULE, } }; static int __init zstd_mod_init(void) { int ret; ret = crypto_register_alg(&alg); if (ret) return ret; ret = crypto_register_scomp(&scomp); if (ret) crypto_unregister_alg(&alg); return ret; } static void __exit zstd_mod_fini(void) { crypto_unregister_alg(&alg); crypto_unregister_scomp(&scomp); } subsys_initcall(zstd_mod_init); module_exit(zstd_mod_fini); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Zstd Compression Algorithm"); MODULE_ALIAS_CRYPTO("zstd");
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1