block: cryptoloop - Use new skcipher interface

This patch replaces uses of blkcipher with the new skcipher
interface.

Signed-off-by: Herbert Xu <[e-mail]>

drivers/block/cryptoloop.c

···
 
 #include <linux/module.h>
 
+#include <crypto/skcipher.h>
 #include <linux/init.h>
 #include <linux/string.h>
-#include <linux/crypto.h>
 #include <linux/blkdev.h>
 #include <linux/scatterlist.h>
 #include <asm/uaccess.h>
···
 	char *cipher;
 	char *mode;
 	char *cmsp = cms;			/* c-m string pointer */
-	struct crypto_blkcipher *tfm;
+	struct crypto_skcipher *tfm;
 
 	/* encryption breaks for non sector aligned offsets */
 
···
 	*cmsp++ = ')';
 	*cmsp = 0;
 
-	tfm = crypto_alloc_blkcipher(cms, 0, CRYPTO_ALG_ASYNC);
+	tfm = crypto_alloc_skcipher(cms, 0, CRYPTO_ALG_ASYNC);
 	if (IS_ERR(tfm))
 		return PTR_ERR(tfm);
 
-	err = crypto_blkcipher_setkey(tfm, info->lo_encrypt_key,
-				      info->lo_encrypt_key_size);
+	err = crypto_skcipher_setkey(tfm, info->lo_encrypt_key,
+				     info->lo_encrypt_key_size);
 	
 	if (err != 0)
 		goto out_free_tfm;
···
 	return 0;
 
  out_free_tfm:
-	crypto_free_blkcipher(tfm);
+	crypto_free_skcipher(tfm);
 
  out:
 	return err;
 }
 
 
-typedef int (*encdec_cbc_t)(struct blkcipher_desc *desc,
-			struct scatterlist *sg_out,
-			struct scatterlist *sg_in,
-			unsigned int nsg);
+typedef int (*encdec_cbc_t)(struct skcipher_request *req);
 
 static int
 cryptoloop_transfer(struct loop_device *lo, int cmd,
···
 		    struct page *loop_page, unsigned loop_off,
 		    int size, sector_t IV)
 {
-	struct crypto_blkcipher *tfm = lo->key_data;
-	struct blkcipher_desc desc = {
-		.tfm = tfm,
-		.flags = CRYPTO_TFM_REQ_MAY_SLEEP,
-	};
+	struct crypto_skcipher *tfm = lo->key_data;
+	SKCIPHER_REQUEST_ON_STACK(req, tfm);
 	struct scatterlist sg_out;
 	struct scatterlist sg_in;
 
···
 	struct page *in_page, *out_page;
 	unsigned in_offs, out_offs;
 	int err;
+
+	skcipher_request_set_tfm(req, tfm);
+	skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP,
+				      NULL, NULL);
 
 	sg_init_table(&sg_out, 1);
 	sg_init_table(&sg_in, 1);
···
 		in_offs = raw_off;
 		out_page = loop_page;
 		out_offs = loop_off;
-		encdecfunc = crypto_blkcipher_crt(tfm)->decrypt;
+		encdecfunc = crypto_skcipher_decrypt;
 	} else {
 		in_page = loop_page;
 		in_offs = loop_off;
 		out_page = raw_page;
 		out_offs = raw_off;
-		encdecfunc = crypto_blkcipher_crt(tfm)->encrypt;
+		encdecfunc = crypto_skcipher_encrypt;
 	}
 
 	while (size > 0) {
···
 		sg_set_page(&sg_in, in_page, sz, in_offs);
 		sg_set_page(&sg_out, out_page, sz, out_offs);
 
-		desc.info = iv;
-		err = encdecfunc(&desc, &sg_out, &sg_in, sz);
+		skcipher_request_set_crypt(req, &sg_in, &sg_out, sz, iv);
+		err = encdecfunc(req);
 		if (err)
-			return err;
+			goto out;
 
 		IV++;
 		size -= sz;
···
 		out_offs += sz;
 	}
 
-	return 0;
+	err = 0;
+
+out:
+	skcipher_request_zero(req);
+	return err;
 }
 
 static int
···
 static int
 cryptoloop_release(struct loop_device *lo)
 {
-	struct crypto_blkcipher *tfm = lo->key_data;
+	struct crypto_skcipher *tfm = lo->key_data;
 	if (tfm != NULL) {
-		crypto_free_blkcipher(tfm);
+		crypto_free_skcipher(tfm);
 		lo->key_data = NULL;
 		return 0;
 	}