cregit-Linux how code gets into the kernel

Release 4.11 crypto/lzo.c

Directory: crypto
/*
 * Cryptographic API.
 *
 * 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/mm.h>
#include <linux/lzo.h>
#include <crypto/internal/scompress.h>


struct lzo_ctx {
	
void *lzo_comp_mem;
};


static void *lzo_alloc_ctx(struct crypto_scomp *tfm) { void *ctx; ctx = kmalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL | __GFP_NOWARN); if (!ctx) ctx = vmalloc(LZO1X_MEM_COMPRESS); if (!ctx) return ERR_PTR(-ENOMEM); return ctx; }

Contributors

PersonTokensPropCommitsCommitProp
Zoltan Sogor2138.89%133.33%
Giovanni Cabiddu1731.48%133.33%
Eric Dumazet1629.63%133.33%
Total54100.00%3100.00%


static int lzo_init(struct crypto_tfm *tfm) { struct lzo_ctx *ctx = crypto_tfm_ctx(tfm); ctx->lzo_comp_mem = lzo_alloc_ctx(NULL); if (IS_ERR(ctx->lzo_comp_mem)) return -ENOMEM; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Giovanni Cabiddu3576.09%150.00%
Zoltan Sogor1123.91%150.00%
Total46100.00%2100.00%


static void lzo_free_ctx(struct crypto_scomp *tfm, void *ctx) { kvfree(ctx); }

Contributors

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


static void lzo_exit(struct crypto_tfm *tfm) { struct lzo_ctx *ctx = crypto_tfm_ctx(tfm); lzo_free_ctx(NULL, ctx->lzo_comp_mem); }

Contributors

PersonTokensPropCommitsCommitProp
Zoltan Sogor2170.00%133.33%
Eric Dumazet620.00%133.33%
Giovanni Cabiddu310.00%133.33%
Total30100.00%3100.00%


static int __lzo_compress(const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen, void *ctx) { size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */ int err; err = lzo1x_1_compress(src, slen, dst, &tmp_len, ctx); if (err != LZO_E_OK) return -EINVAL; *dlen = tmp_len; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Zoltan Sogor6793.06%150.00%
Giovanni Cabiddu56.94%150.00%
Total72100.00%2100.00%


static int lzo_compress(struct crypto_tfm *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen) { struct lzo_ctx *ctx = crypto_tfm_ctx(tfm); return __lzo_compress(src, slen, dst, dlen, ctx->lzo_comp_mem); }

Contributors

PersonTokensPropCommitsCommitProp
Giovanni Cabiddu2850.91%150.00%
Zoltan Sogor2749.09%150.00%
Total55100.00%2100.00%


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

Contributors

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


static int __lzo_decompress(const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen) { int err; size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */ err = lzo1x_decompress_safe(src, slen, dst, &tmp_len); if (err != LZO_E_OK) return -EINVAL; *dlen = tmp_len; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Zoltan Sogor4365.15%150.00%
Giovanni Cabiddu2334.85%150.00%
Total66100.00%2100.00%


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

Contributors

PersonTokensPropCommitsCommitProp
Giovanni Cabiddu41100.00%1100.00%
Total41100.00%1100.00%


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

Contributors

PersonTokensPropCommitsCommitProp
Giovanni Cabiddu45100.00%1100.00%
Total45100.00%1100.00%

static struct crypto_alg alg = { .cra_name = "lzo", .cra_flags = CRYPTO_ALG_TYPE_COMPRESS, .cra_ctxsize = sizeof(struct lzo_ctx), .cra_module = THIS_MODULE, .cra_init = lzo_init, .cra_exit = lzo_exit, .cra_u = { .compress = { .coa_compress = lzo_compress, .coa_decompress = lzo_decompress } } }; static struct scomp_alg scomp = { .alloc_ctx = lzo_alloc_ctx, .free_ctx = lzo_free_ctx, .compress = lzo_scompress, .decompress = lzo_sdecompress, .base = { .cra_name = "lzo", .cra_driver_name = "lzo-scomp", .cra_module = THIS_MODULE, } };
static int __init lzo_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; } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Giovanni Cabiddu3871.70%133.33%
Zoltan Sogor1426.42%133.33%
Kamalesh Babulal11.89%133.33%
Total53100.00%3100.00%


static void __exit lzo_mod_fini(void) { crypto_unregister_alg(&alg); crypto_unregister_scomp(&scomp); }

Contributors

PersonTokensPropCommitsCommitProp
Zoltan Sogor1466.67%133.33%
Giovanni Cabiddu628.57%133.33%
Kamalesh Babulal14.76%133.33%
Total21100.00%3100.00%

module_init(lzo_mod_init); module_exit(lzo_mod_fini); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("LZO Compression Algorithm"); MODULE_ALIAS_CRYPTO("lzo");

Overall Contributors

PersonTokensPropCommitsCommitProp
Giovanni Cabiddu35850.14%120.00%
Zoltan Sogor32245.10%120.00%
Eric Dumazet253.50%120.00%
Kees Cook50.70%120.00%
Kamalesh Babulal40.56%120.00%
Total714100.00%5100.00%
Directory: crypto
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