1 files changed, 45 insertions, 49 deletions

diff --git a/crypto/lzo.c b/crypto/lzo.c
index 1c2aa69c54b8..d43242b24b4e 100644
--- a/crypto/lzo.c
+++ b/crypto/lzo.c
@@ -1,57 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * 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 <crypto/internal/scompress.h>
 #include <linux/init.h>
-#include <linux/module.h>
-#include <linux/crypto.h>
-#include <linux/vmalloc.h>
 #include <linux/lzo.h>
+#include <linux/module.h>
+#include <linux/slab.h>
 
-struct lzo_ctx {
-	void *lzo_comp_mem;
-};
-
-static int lzo_init(struct crypto_tfm *tfm)
+static void *lzo_alloc_ctx(void)
 {
-	struct lzo_ctx *ctx = crypto_tfm_ctx(tfm);
+	void *ctx;
 
-	ctx->lzo_comp_mem = vmalloc(LZO1X_MEM_COMPRESS);
-	if (!ctx->lzo_comp_mem)
-		return -ENOMEM;
+	ctx = kvmalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
+	if (!ctx)
+		return ERR_PTR(-ENOMEM);
 
-	return 0;
+	return ctx;
 }
 
-static void lzo_exit(struct crypto_tfm *tfm)
+static void lzo_free_ctx(void *ctx)
 {
-	struct lzo_ctx *ctx = crypto_tfm_ctx(tfm);
-
-	vfree(ctx->lzo_comp_mem);
+	kvfree(ctx);
 }
 
-static int lzo_compress(struct crypto_tfm *tfm, const u8 *src,
-			    unsigned int slen, u8 *dst, unsigned int *dlen)
+static int __lzo_compress(const u8 *src, unsigned int slen,
+			  u8 *dst, unsigned int *dlen, void *ctx)
 {
-	struct lzo_ctx *ctx = crypto_tfm_ctx(tfm);
 	size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */
 	int err;
 
-	err = lzo1x_1_compress(src, slen, dst, &tmp_len, ctx->lzo_comp_mem);
+	err = lzo1x_1_compress_safe(src, slen, dst, &tmp_len, ctx);
 
 	if (err != LZO_E_OK)
 		return -EINVAL;
@@ -60,8 +40,15 @@ static int lzo_compress(struct crypto_tfm *tfm, const u8 *src,
 	return 0;
 }
 
-static int lzo_decompress(struct crypto_tfm *tfm, const u8 *src,
-			      unsigned int slen, u8 *dst, unsigned int *dlen)
+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);
+}
+
+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 */
@@ -73,29 +60,37 @@ static int lzo_decompress(struct crypto_tfm *tfm, const u8 *src,
 
 	*dlen = tmp_len;
 	return 0;
+}
 
+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);
 }
 
-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 = {
+	.streams		= {
+		.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)
 {
-	return crypto_register_alg(&alg);
+	return crypto_register_scomp(&scomp);
 }
 
 static void __exit lzo_mod_fini(void)
 {
-	crypto_unregister_alg(&alg);
+	crypto_unregister_scomp(&scomp);
 }
 
 module_init(lzo_mod_init);
@@ -103,3 +98,4 @@ module_exit(lzo_mod_fini);
 
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("LZO Compression Algorithm");
+MODULE_ALIAS_CRYPTO("lzo");