import PULS_20180308

crypto/Kconfig

@@ -1364,6 +1364,12 @@ config CRYPTO_LZO
 	help
 	  This is the LZO algorithm.
 
+config CRYPTO_LZ4K
+        tristate "LZ4K compression algorithm"
+        select CRYPTO_ALGAPI
+        help
+          This is the LZ4K algorithm.
+          
 config CRYPTO_842
 	tristate "842 compression algorithm"
 	depends on CRYPTO_DEV_NX_COMPRESS

crypto/Makefile

@@ -85,6 +85,7 @@ obj-$(CONFIG_CRYPTO_CRC32C) += crc32c.o
 obj-$(CONFIG_CRYPTO_CRC32) += crc32.o
 obj-$(CONFIG_CRYPTO_AUTHENC) += authenc.o authencesn.o
 obj-$(CONFIG_CRYPTO_LZO) += lzo.o
+obj-$(CONFIG_CRYPTO_LZ4K) += lz4kc.o
 obj-$(CONFIG_CRYPTO_842) += 842.o
 obj-$(CONFIG_CRYPTO_RNG2) += rng.o
 obj-$(CONFIG_CRYPTO_RNG2) += krng.o

crypto/lz4kc.c

@@ -0,0 +1,151 @@
+/*
+ * 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/lzo.h>
+#include <linux/lz4k.h>
+
+#define malloc(a) kmalloc(a, GFP_KERNEL)
+#define free(a) kfree(a)
+
+#if 0
+
+extern int lz4k_compress_ubifs(const unsigned char *in, size_t in_len, unsigned char *out,
+        size_t *out_len, void *wrkmem);
+
+extern int lz4k_decompress_ubifs(const unsigned char *in, size_t in_len,
+    unsigned char *out, size_t *out_len);
+
+extern int lz4k_compress(const unsigned char *in, size_t in_len, unsigned char *out,
+        size_t *out_len, void *wrkmem);
+#endif
+struct lz4k_ctx {
+	void *lz4k_comp_mem;
+};
+
+static int lz4kc_init(struct crypto_tfm *tfm)
+{
+	struct lz4k_ctx *ctx = crypto_tfm_ctx(tfm);
+
+	ctx->lz4k_comp_mem = vmalloc(LZO1X_MEM_COMPRESS);
+	if (!ctx->lz4k_comp_mem)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static void lz4kc_exit(struct crypto_tfm *tfm)
+{
+	struct lz4k_ctx *ctx = crypto_tfm_ctx(tfm);
+
+	vfree(ctx->lz4k_comp_mem);
+}
+
+static int lz4kc_compress(struct crypto_tfm *tfm, const u8 *src,
+			    unsigned int slen, u8 *dst, unsigned int *dlen)
+{
+
+    struct lz4k_ctx *ctx = crypto_tfm_ctx(tfm);
+    //static size_t in_size = 0, out_size = 0;
+    size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */
+    int err;
+
+      static int count = 0;
+
+    //printk("lz4k_compress 2 count = %d\r\n", count);
+
+	count++;
+	
+
+    err = lz4k_compress(src, slen, dst, &tmp_len, ctx->lz4k_comp_mem);
+	//err = lzo1x_1_compress(src, slen, dst, &tmp_len, ctx->lz4k_comp_mem);
+
+
+    if (err != LZO_E_OK)
+        return -EINVAL;
+#if 0
+    if (count%10 == 0)
+    {
+	  in_size += slen;
+	  out_size += tmp_len;
+	  printk("lz4k_compress_ubifs result in_size = %d, out_size = %d \n", in_size,out_size);
+    }
+#endif	
+    //printk("lz4k_compress result in_size = %d, out_size = %d \n", in_size,out_size);
+    //printk("lz4k_compress result slen = %d, tmp_len = %d \n", slen,tmp_len);
+
+    *dlen = tmp_len;
+    return 0;
+	
+}
+
+static int lz4kc_decompress(struct crypto_tfm *tfm, const u8 *src,
+			      unsigned int slen, u8 *dst, unsigned int *dlen)
+{
+	static int count = 0;
+	int err;
+	size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */
+
+	
+	//printk("lz4k_decompress 2count = %d, *dlen = %d", count,*dlen);
+
+	err = lz4k_decompress_ubifs(src, slen, dst, &tmp_len);
+	//err = lzo1x_decompress_safe(src, slen, dst, &tmp_len);
+
+
+	count++;
+
+	if (err != LZO_E_OK)
+		return -EINVAL;
+
+	*dlen = tmp_len;
+	return 0;	
+
+}
+
+static struct crypto_alg alg = {
+	.cra_name		= "lz4k",
+	.cra_flags		= CRYPTO_ALG_TYPE_COMPRESS,
+	.cra_ctxsize		= sizeof(struct lz4k_ctx),
+	.cra_module		= THIS_MODULE,
+	.cra_list		= LIST_HEAD_INIT(alg.cra_list),
+	.cra_init		= lz4kc_init,
+	.cra_exit		= lz4kc_exit,
+	.cra_u			= { .compress = {
+	.coa_compress 		= lz4kc_compress,
+	.coa_decompress  	= lz4kc_decompress } }
+};
+
+static int __init lz4k_mod_init(void)
+{
+	return crypto_register_alg(&alg);
+}
+
+static void __exit lz4k_mod_fini(void)
+{
+	crypto_unregister_alg(&alg);
+}
+
+module_init(lz4k_mod_init);
+module_exit(lz4k_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("LZ77 with 4K Compression Algorithm");