cregit-Linux how code gets into the kernel

Release 4.11 crypto/lz4.c

Directory: crypto
/*
 * Cryptographic API.
 *
 * Copyright (c) 2013 Chanho Min <chanho.min@lge.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 *
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/crypto.h>
#include <linux/vmalloc.h>
#include <linux/lz4.h>
#include <crypto/internal/scompress.h>


struct lz4_ctx {
	
void *lz4_comp_mem;
};


static void *lz4_alloc_ctx(struct crypto_scomp *tfm) { void *ctx; ctx = vmalloc(LZ4_MEM_COMPRESS); if (!ctx) return ERR_PTR(-ENOMEM); return ctx; }

Contributors

PersonTokensPropCommitsCommitProp
Giovanni Cabiddu38100.00%1100.00%
Total38100.00%1100.00%


static int lz4_init(struct crypto_tfm *tfm) { struct lz4_ctx *ctx = crypto_tfm_ctx(tfm); ctx->lz4_comp_mem = lz4_alloc_ctx(NULL); if (IS_ERR(ctx->lz4_comp_mem)) return -ENOMEM; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Chanho Min4189.13%150.00%
Giovanni Cabiddu510.87%150.00%
Total46100.00%2100.00%


static void lz4_free_ctx(struct crypto_scomp *tfm, void *ctx) { vfree(ctx); }

Contributors

PersonTokensPropCommitsCommitProp
Giovanni Cabiddu20100.00%1100.00%
Total20100.00%1100.00%


static void lz4_exit(struct crypto_tfm *tfm) { struct lz4_ctx *ctx = crypto_tfm_ctx(tfm); lz4_free_ctx(NULL, ctx->lz4_comp_mem); }

Contributors

PersonTokensPropCommitsCommitProp
Chanho Min2790.00%150.00%
Giovanni Cabiddu310.00%150.00%
Total30100.00%2100.00%


static int __lz4_compress_crypto(const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen, void *ctx) { int out_len = LZ4_compress_default(src, dst, slen, *dlen, ctx); if (!out_len) return -EINVAL; *dlen = out_len; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Chanho Min4674.19%133.33%
Sven Schmidt1117.74%133.33%
Giovanni Cabiddu58.06%133.33%
Total62100.00%3100.00%


static int lz4_scompress(struct crypto_scomp *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen, void *ctx) { return __lz4_compress_crypto(src, slen, dst, dlen, ctx); }

Contributors

PersonTokensPropCommitsCommitProp
Giovanni Cabiddu4595.74%150.00%
Chanho Min24.26%150.00%
Total47100.00%2100.00%


static int lz4_compress_crypto(struct crypto_tfm *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen) { struct lz4_ctx *ctx = crypto_tfm_ctx(tfm); return __lz4_compress_crypto(src, slen, dst, dlen, ctx->lz4_comp_mem); }

Contributors

PersonTokensPropCommitsCommitProp
Giovanni Cabiddu3054.55%150.00%
Chanho Min2545.45%150.00%
Total55100.00%2100.00%


static int __lz4_decompress_crypto(const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen, void *ctx) { int out_len = LZ4_decompress_safe(src, dst, slen, *dlen); if (out_len < 0) return out_len; *dlen = out_len; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Giovanni Cabiddu2745.00%133.33%
Chanho Min2236.67%133.33%
Sven Schmidt1118.33%133.33%
Total60100.00%3100.00%


static int lz4_sdecompress(struct crypto_scomp *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen, void *ctx) { return __lz4_decompress_crypto(src, slen, dst, dlen, NULL); }

Contributors

PersonTokensPropCommitsCommitProp
Giovanni Cabiddu47100.00%1100.00%
Total47100.00%1100.00%


static int lz4_decompress_crypto(struct crypto_tfm *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen) { return __lz4_decompress_crypto(src, slen, dst, dlen, NULL); }

Contributors

PersonTokensPropCommitsCommitProp
Giovanni Cabiddu43100.00%1100.00%
Total43100.00%1100.00%

static struct crypto_alg alg_lz4 = { .cra_name = "lz4", .cra_flags = CRYPTO_ALG_TYPE_COMPRESS, .cra_ctxsize = sizeof(struct lz4_ctx), .cra_module = THIS_MODULE, .cra_list = LIST_HEAD_INIT(alg_lz4.cra_list), .cra_init = lz4_init, .cra_exit = lz4_exit, .cra_u = { .compress = { .coa_compress = lz4_compress_crypto, .coa_decompress = lz4_decompress_crypto } } }; static struct scomp_alg scomp = { .alloc_ctx = lz4_alloc_ctx, .free_ctx = lz4_free_ctx, .compress = lz4_scompress, .decompress = lz4_sdecompress, .base = { .cra_name = "lz4", .cra_driver_name = "lz4-scomp", .cra_module = THIS_MODULE, } };
static int __init lz4_mod_init(void) { int ret; ret = crypto_register_alg(&alg_lz4); if (ret) return ret; ret = crypto_register_scomp(&scomp); if (ret) { crypto_unregister_alg(&alg_lz4); return ret; } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Giovanni Cabiddu3871.70%150.00%
Chanho Min1528.30%150.00%
Total53100.00%2100.00%


static void __exit lz4_mod_fini(void) { crypto_unregister_alg(&alg_lz4); crypto_unregister_scomp(&scomp); }

Contributors

PersonTokensPropCommitsCommitProp
Chanho Min1571.43%150.00%
Giovanni Cabiddu628.57%150.00%
Total21100.00%2100.00%

module_init(lz4_mod_init); module_exit(lz4_mod_fini); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("LZ4 Compression Algorithm"); MODULE_ALIAS_CRYPTO("lz4");

Overall Contributors

PersonTokensPropCommitsCommitProp
Giovanni Cabiddu35751.52%125.00%
Chanho Min30944.59%125.00%
Sven Schmidt223.17%125.00%
Kees Cook50.72%125.00%
Total693100.00%4100.00%
Directory: crypto
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