diff --git a/crypto/Kconfig b/crypto/Kconfig
index 84d7148..dc33a33 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -326,6 +326,16 @@ config CRYPTO_CTS
 	  This mode is required for Kerberos gss mechanism support
 	  for AES encryption.
 
+config CRYPTO_GENIV
+	tristate "IV Generation for dm-crypt"
+	select CRYPTO_BLKCIPHER
+	help
+	  GENIV: IV Generation for dm-crypt
+	  Algorithms to generate Initialization Vector for ciphers
+	  used by dm-crypt.  The iv generation algorithms implemented
+	  as part of geniv include plain, plain64, essiv, benbi, null,
+	  lmk and tcw.
+
 config CRYPTO_ECB
 	tristate "ECB support"
 	select CRYPTO_BLKCIPHER
diff --git a/crypto/Makefile b/crypto/Makefile
index bd6a029..627ec76 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -75,6 +75,7 @@ obj-$(CONFIG_CRYPTO_TGR192) += tgr192.o
 obj-$(CONFIG_CRYPTO_GF128MUL) += gf128mul.o
 obj-$(CONFIG_CRYPTO_ECB) += ecb.o
 obj-$(CONFIG_CRYPTO_CBC) += cbc.o
+obj-$(CONFIG_CRYPTO_GENIV) += geniv.o
 obj-$(CONFIG_CRYPTO_PCBC) += pcbc.o
 obj-$(CONFIG_CRYPTO_CTS) += cts.o
 obj-$(CONFIG_CRYPTO_LRW) += lrw.o
diff --git a/crypto/geniv.c b/crypto/geniv.c
new file mode 100644
index 0000000..ac81a49
--- /dev/null
+++ b/crypto/geniv.c
@@ -0,0 +1,1294 @@
+/*
+ * geniv: IV generation algorithms
+ *
+ * Copyright (c) 2016, Linaro Ltd.
+ * Copyright (C) 2006-2015 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2013 Milan Broz <gmazyland@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+
+#include <crypto/algapi.h>
+#include <crypto/internal/skcipher.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/log2.h>
+#include <linux/module.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/completion.h>
+#include <linux/crypto.h>
+#include <linux/workqueue.h>
+#include <linux/backing-dev.h>
+#include <linux/atomic.h>
+#include <linux/rbtree.h>
+#include <crypto/hash.h>
+#include <crypto/md5.h>
+#include <crypto/algapi.h>
+#include <crypto/skcipher.h>
+#include <asm/unaligned.h>
+#include <crypto/geniv.h>
+
+struct geniv_ctx;
+struct crypto_geniv_req_ctx;
+
+/* Sub request for each of the skcipher_request's for a segment */
+struct crypto_geniv_subreq {
+	struct skcipher_request req CRYPTO_MINALIGN_ATTR;
+	struct crypto_geniv_req_ctx *rctx;
+};
+
+struct crypto_geniv_req_ctx {
+	struct crypto_geniv_subreq *subreqs;
+	struct scatterlist *src;
+	struct scatterlist *dst;
+	bool is_write;
+	sector_t iv_sector;
+	unsigned int nents;
+	u8 *iv;
+	struct completion restart;
+	atomic_t req_pending;
+	struct skcipher_request *req;
+};
+
+struct geniv_operations {
+	int (*ctr)(struct geniv_ctx *ctx);
+	void (*dtr)(struct geniv_ctx *ctx);
+	int (*init)(struct geniv_ctx *ctx);
+	int (*wipe)(struct geniv_ctx *ctx);
+	int (*generator)(struct geniv_ctx *ctx,
+			 struct crypto_geniv_req_ctx *rctx, int n);
+	int (*post)(struct geniv_ctx *ctx,
+		    struct crypto_geniv_req_ctx *rctx, int n);
+};
+
+struct geniv_essiv_private {
+	struct crypto_ahash *hash_tfm;
+	u8 *salt;
+};
+
+struct geniv_benbi_private {
+	int shift;
+};
+
+struct geniv_lmk_private {
+	struct crypto_shash *hash_tfm;
+	u8 *seed;
+};
+
+struct geniv_tcw_private {
+	struct crypto_shash *crc32_tfm;
+	u8 *iv_seed;
+	u8 *whitening;
+};
+
+struct geniv_ctx {
+	struct crypto_skcipher *child;
+	unsigned int tfms_count;
+	char *ivmode;
+	unsigned int iv_size;
+	char *ivopts;
+	char *cipher;
+	struct geniv_operations *iv_gen_ops;
+	union {
+		struct geniv_essiv_private essiv;
+		struct geniv_benbi_private benbi;
+		struct geniv_lmk_private lmk;
+		struct geniv_tcw_private tcw;
+	} iv_gen_private;
+	void *iv_private;
+	struct crypto_skcipher *tfm;
+	unsigned int key_size;
+	unsigned int key_extra_size;
+	unsigned int key_parts;      /* independent parts in key buffer */
+	enum setkey_op keyop;
+	char *msg;
+	u8 *key;
+};
+
+static struct crypto_skcipher *any_tfm(struct geniv_ctx *ctx)
+{
+	return ctx->tfm;
+}
+
+static inline
+struct crypto_geniv_req_ctx *geniv_req_ctx(struct skcipher_request *req)
+{
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	unsigned long align = crypto_skcipher_alignmask(tfm);
+
+	return (void *) PTR_ALIGN((u8 *)skcipher_request_ctx(req), align + 1);
+}
+
+static int crypt_iv_plain_gen(struct geniv_ctx *ctx,
+			      struct crypto_geniv_req_ctx *rctx, int n)
+{
+	u8 *iv = rctx->iv;
+
+	memset(iv, 0, ctx->iv_size);
+	*(__le32 *)iv = cpu_to_le32(rctx->iv_sector & 0xffffffff);
+
+	return 0;
+}
+
+static int crypt_iv_plain64_gen(struct geniv_ctx *ctx,
+				struct crypto_geniv_req_ctx *rctx, int n)
+{
+	u8 *iv = rctx->iv;
+
+	memset(iv, 0, ctx->iv_size);
+	*(__le64 *)iv = cpu_to_le64(rctx->iv_sector);
+
+	return 0;
+}
+
+/* Initialise ESSIV - compute salt but no local memory allocations */
+static int crypt_iv_essiv_init(struct geniv_ctx *ctx)
+{
+	struct geniv_essiv_private *essiv = &ctx->iv_gen_private.essiv;
+	struct scatterlist sg;
+	struct crypto_cipher *essiv_tfm;
+	int err;
+	AHASH_REQUEST_ON_STACK(req, essiv->hash_tfm);
+
+	sg_init_one(&sg, ctx->key, ctx->key_size);
+	ahash_request_set_tfm(req, essiv->hash_tfm);
+	ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP, NULL, NULL);
+	ahash_request_set_crypt(req, &sg, essiv->salt, ctx->key_size);
+
+	err = crypto_ahash_digest(req);
+	ahash_request_zero(req);
+	if (err)
+		return err;
+
+	essiv_tfm = ctx->iv_private;
+
+	err = crypto_cipher_setkey(essiv_tfm, essiv->salt,
+			    crypto_ahash_digestsize(essiv->hash_tfm));
+	if (err)
+		return err;
+
+	return 0;
+}
+
+/* Wipe salt and reset key derived from volume key */
+static int crypt_iv_essiv_wipe(struct geniv_ctx *ctx)
+{
+	struct geniv_essiv_private *essiv = &ctx->iv_gen_private.essiv;
+	unsigned int salt_size = crypto_ahash_digestsize(essiv->hash_tfm);
+	struct crypto_cipher *essiv_tfm;
+	int r, err = 0;
+
+	memset(essiv->salt, 0, salt_size);
+
+	essiv_tfm = ctx->iv_private;
+	r = crypto_cipher_setkey(essiv_tfm, essiv->salt, salt_size);
+	if (r)
+		err = r;
+
+	return err;
+}
+
+/* Set up per cpu cipher state */
+static struct crypto_cipher *setup_essiv_cpu(struct geniv_ctx *ctx,
+					     u8 *salt, unsigned int saltsize)
+{
+	struct crypto_cipher *essiv_tfm;
+	int err;
+
+	/* Setup the essiv_tfm with the given salt */
+	essiv_tfm = crypto_alloc_cipher(ctx->cipher, 0, CRYPTO_ALG_ASYNC);
+
+	if (IS_ERR(essiv_tfm)) {
+		pr_err("Error allocating crypto tfm for ESSIV\n");
+		return essiv_tfm;
+	}
+
+	if (crypto_cipher_blocksize(essiv_tfm) !=
+	    crypto_skcipher_ivsize(any_tfm(ctx))) {
+		pr_err("Block size of ESSIV cipher does not match IV size of block cipher\n");
+		crypto_free_cipher(essiv_tfm);
+		return ERR_PTR(-EINVAL);
+	}
+
+	err = crypto_cipher_setkey(essiv_tfm, salt, saltsize);
+	if (err) {
+		pr_err("Failed to set key for ESSIV cipher\n");
+		crypto_free_cipher(essiv_tfm);
+		return ERR_PTR(err);
+	}
+	return essiv_tfm;
+}
+
+static void crypt_iv_essiv_dtr(struct geniv_ctx *ctx)
+{
+	struct crypto_cipher *essiv_tfm;
+	struct geniv_essiv_private *essiv = &ctx->iv_gen_private.essiv;
+
+	crypto_free_ahash(essiv->hash_tfm);
+	essiv->hash_tfm = NULL;
+
+	kzfree(essiv->salt);
+	essiv->salt = NULL;
+
+	essiv_tfm = ctx->iv_private;
+
+	if (essiv_tfm)
+		crypto_free_cipher(essiv_tfm);
+
+	ctx->iv_private = NULL;
+}
+
+static int crypt_iv_essiv_ctr(struct geniv_ctx *ctx)
+{
+	struct crypto_cipher *essiv_tfm = NULL;
+	struct crypto_ahash *hash_tfm = NULL;
+	u8 *salt = NULL;
+	int err;
+
+	if (!ctx->ivopts) {
+		pr_err("Digest algorithm missing for ESSIV mode\n");
+		return -EINVAL;
+	}
+
+	/* Allocate hash algorithm */
+	hash_tfm = crypto_alloc_ahash(ctx->ivopts, 0, CRYPTO_ALG_ASYNC);
+	if (IS_ERR(hash_tfm)) {
+		err = PTR_ERR(hash_tfm);
+		pr_err("Error initializing ESSIV hash. err=%d\n", err);
+		goto bad;
+	}
+
+	salt = kzalloc(crypto_ahash_digestsize(hash_tfm), GFP_KERNEL);
+	if (!salt) {
+		err = -ENOMEM;
+		goto bad;
+	}
+
+	ctx->iv_gen_private.essiv.salt = salt;
+	ctx->iv_gen_private.essiv.hash_tfm = hash_tfm;
+
+	essiv_tfm = setup_essiv_cpu(ctx, salt,
+				crypto_ahash_digestsize(hash_tfm));
+	if (IS_ERR(essiv_tfm)) {
+		crypt_iv_essiv_dtr(ctx);
+		return PTR_ERR(essiv_tfm);
+	}
+	ctx->iv_private = essiv_tfm;
+
+	return 0;
+
+bad:
+	if (hash_tfm && !IS_ERR(hash_tfm))
+		crypto_free_ahash(hash_tfm);
+	kfree(salt);
+	return err;
+}
+
+static int crypt_iv_essiv_gen(struct geniv_ctx *ctx,
+			      struct crypto_geniv_req_ctx *rctx, int n)
+{
+	u8 *iv = rctx->iv;
+	struct crypto_cipher *essiv_tfm = ctx->iv_private;
+
+	memset(iv, 0, ctx->iv_size);
+	*(__le64 *)iv = cpu_to_le64(rctx->iv_sector);
+	crypto_cipher_encrypt_one(essiv_tfm, iv, iv);
+
+	return 0;
+}
+
+static int crypt_iv_benbi_ctr(struct geniv_ctx *ctx)
+{
+	unsigned int bs = crypto_skcipher_blocksize(any_tfm(ctx));
+	int log = ilog2(bs);
+
+	/* we need to calculate how far we must shift the sector count
+	 * to get the cipher block count, we use this shift in _gen
+	 */
+
+	if (1 << log != bs) {
+		pr_err("cypher blocksize is not a power of 2\n");
+		return -EINVAL;
+	}
+
+	if (log > 9) {
+		pr_err("cypher blocksize is > 512\n");
+		return -EINVAL;
+	}
+
+	ctx->iv_gen_private.benbi.shift = 9 - log;
+
+	return 0;
+}
+
+static int crypt_iv_benbi_gen(struct geniv_ctx *ctx,
+			      struct crypto_geniv_req_ctx *rctx, int n)
+{
+	u8 *iv = rctx->iv;
+	__be64 val;
+
+	memset(iv, 0, ctx->iv_size - sizeof(u64)); /* rest is cleared below */
+
+	val = cpu_to_be64(((u64) rctx->iv_sector <<
+			  ctx->iv_gen_private.benbi.shift) + 1);
+	put_unaligned(val, (__be64 *)(iv + ctx->iv_size - sizeof(u64)));
+
+	return 0;
+}
+
+static int crypt_iv_null_gen(struct geniv_ctx *ctx,
+			     struct crypto_geniv_req_ctx *rctx, int n)
+{
+	u8 *iv = rctx->iv;
+
+	memset(iv, 0, ctx->iv_size);
+	return 0;
+}
+
+static void crypt_iv_lmk_dtr(struct geniv_ctx *ctx)
+{
+	struct geniv_lmk_private *lmk = &ctx->iv_gen_private.lmk;
+
+	if (lmk->hash_tfm && !IS_ERR(lmk->hash_tfm))
+		crypto_free_shash(lmk->hash_tfm);
+	lmk->hash_tfm = NULL;
+
+	kzfree(lmk->seed);
+	lmk->seed = NULL;
+}
+
+static int crypt_iv_lmk_ctr(struct geniv_ctx *ctx)
+{
+	struct geniv_lmk_private *lmk = &ctx->iv_gen_private.lmk;
+
+	lmk->hash_tfm = crypto_alloc_shash("md5", 0, 0);
+	if (IS_ERR(lmk->hash_tfm)) {
+		pr_err("Error initializing LMK hash; err=%ld\n",
+				PTR_ERR(lmk->hash_tfm));
+		return PTR_ERR(lmk->hash_tfm);
+	}
+
+	/* No seed in LMK version 2 */
+	if (ctx->key_parts == ctx->tfms_count) {
+		lmk->seed = NULL;
+		return 0;
+	}
+
+	lmk->seed = kzalloc(LMK_SEED_SIZE, GFP_KERNEL);
+	if (!lmk->seed) {
+		crypt_iv_lmk_dtr(ctx);
+		pr_err("Error kmallocing seed storage in LMK\n");
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static int crypt_iv_lmk_init(struct geniv_ctx *ctx)
+{
+	struct geniv_lmk_private *lmk = &ctx->iv_gen_private.lmk;
+	int subkey_size = ctx->key_size / ctx->key_parts;
+
+	/* LMK seed is on the position of LMK_KEYS + 1 key */
+	if (lmk->seed)
+		memcpy(lmk->seed, ctx->key + (ctx->tfms_count * subkey_size),
+		       crypto_shash_digestsize(lmk->hash_tfm));
+
+	return 0;
+}
+
+static int crypt_iv_lmk_wipe(struct geniv_ctx *ctx)
+{
+	struct geniv_lmk_private *lmk = &ctx->iv_gen_private.lmk;
+
+	if (lmk->seed)
+		memset(lmk->seed, 0, LMK_SEED_SIZE);
+
+	return 0;
+}
+
+static int crypt_iv_lmk_one(struct geniv_ctx *ctx, u8 *iv,
+			    struct crypto_geniv_req_ctx *rctx, u8 *data)
+{
+	struct geniv_lmk_private *lmk = &ctx->iv_gen_private.lmk;
+	struct md5_state md5state;
+	__le32 buf[4];
+	int i, r;
+	SHASH_DESC_ON_STACK(desc, lmk->hash_tfm);
+
+	desc->tfm = lmk->hash_tfm;
+	desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
+
+	r = crypto_shash_init(desc);
+	if (r)
+		return r;
+
+	if (lmk->seed) {
+		r = crypto_shash_update(desc, lmk->seed, LMK_SEED_SIZE);
+		if (r)
+			return r;
+	}
+
+	/* Sector is always 512B, block size 16, add data of blocks 1-31 */
+	r = crypto_shash_update(desc, data + 16, 16 * 31);
+	if (r)
+		return r;
+
+	/* Sector is cropped to 56 bits here */
+	buf[0] = cpu_to_le32(rctx->iv_sector & 0xFFFFFFFF);
+	buf[1] = cpu_to_le32((((u64)rctx->iv_sector >> 32) & 0x00FFFFFF)
+			     | 0x80000000);
+	buf[2] = cpu_to_le32(4024);
+	buf[3] = 0;
+	r = crypto_shash_update(desc, (u8 *)buf, sizeof(buf));
+	if (r)
+		return r;
+
+	/* No MD5 padding here */
+	r = crypto_shash_export(desc, &md5state);
+	if (r)
+		return r;
+
+	for (i = 0; i < MD5_HASH_WORDS; i++)
+		__cpu_to_le32s(&md5state.hash[i]);
+	memcpy(iv, &md5state.hash, ctx->iv_size);
+
+	return 0;
+}
+
+static int crypt_iv_lmk_gen(struct geniv_ctx *ctx,
+			    struct crypto_geniv_req_ctx *rctx, int n)
+{
+	u8 *src;
+	u8 *iv = rctx->iv;
+	int r = 0;
+
+	if (rctx->is_write) {
+		src = kmap_atomic(sg_page(&rctx->src[n]));
+		r = crypt_iv_lmk_one(ctx, iv, rctx, src + rctx->src[n].offset);
+		kunmap_atomic(src);
+	} else
+		memset(iv, 0, ctx->iv_size);
+
+	return r;
+}
+
+static int crypt_iv_lmk_post(struct geniv_ctx *ctx,
+			     struct crypto_geniv_req_ctx *rctx, int n)
+{
+	u8 *dst;
+	u8 *iv = rctx->iv;
+	int r;
+
+	if (rctx->is_write)
+		return 0;
+
+	dst = kmap_atomic(sg_page(&rctx->dst[n]));
+	r = crypt_iv_lmk_one(ctx, iv, rctx, dst + rctx->dst[n].offset);
+
+	/* Tweak the first block of plaintext sector */
+	if (!r)
+		crypto_xor(dst + rctx->dst[n].offset, iv, ctx->iv_size);
+
+	kunmap_atomic(dst);
+	return r;
+}
+
+static void crypt_iv_tcw_dtr(struct geniv_ctx *ctx)
+{
+	struct geniv_tcw_private *tcw = &ctx->iv_gen_private.tcw;
+
+	kzfree(tcw->iv_seed);
+	tcw->iv_seed = NULL;
+	kzfree(tcw->whitening);
+	tcw->whitening = NULL;
+
+	if (tcw->crc32_tfm && !IS_ERR(tcw->crc32_tfm))
+		crypto_free_shash(tcw->crc32_tfm);
+	tcw->crc32_tfm = NULL;
+}
+
+static int crypt_iv_tcw_ctr(struct geniv_ctx *ctx)
+{
+	struct geniv_tcw_private *tcw = &ctx->iv_gen_private.tcw;
+
+	if (ctx->key_size <= (ctx->iv_size + TCW_WHITENING_SIZE)) {
+		pr_err("Wrong key size (%d) for TCW. Choose a value > %d bytes\n",
+			ctx->key_size,
+			ctx->iv_size + TCW_WHITENING_SIZE);
+		return -EINVAL;
+	}
+
+	tcw->crc32_tfm = crypto_alloc_shash("crc32", 0, 0);
+	if (IS_ERR(tcw->crc32_tfm)) {
+		pr_err("Error initializing CRC32 in TCW; err=%ld\n",
+			PTR_ERR(tcw->crc32_tfm));
+		return PTR_ERR(tcw->crc32_tfm);
+	}
+
+	tcw->iv_seed = kzalloc(ctx->iv_size, GFP_KERNEL);
+	tcw->whitening = kzalloc(TCW_WHITENING_SIZE, GFP_KERNEL);
+	if (!tcw->iv_seed || !tcw->whitening) {
+		crypt_iv_tcw_dtr(ctx);
+		pr_err("Error allocating seed storage in TCW\n");
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static int crypt_iv_tcw_init(struct geniv_ctx *ctx)
+{
+	struct geniv_tcw_private *tcw = &ctx->iv_gen_private.tcw;
+	int key_offset = ctx->key_size - ctx->iv_size - TCW_WHITENING_SIZE;
+
+	memcpy(tcw->iv_seed, &ctx->key[key_offset], ctx->iv_size);
+	memcpy(tcw->whitening, &ctx->key[key_offset + ctx->iv_size],
+	       TCW_WHITENING_SIZE);
+
+	return 0;
+}
+
+static int crypt_iv_tcw_wipe(struct geniv_ctx *ctx)
+{
+	struct geniv_tcw_private *tcw = &ctx->iv_gen_private.tcw;
+
+	memset(tcw->iv_seed, 0, ctx->iv_size);
+	memset(tcw->whitening, 0, TCW_WHITENING_SIZE);
+
+	return 0;
+}
+
+static int crypt_iv_tcw_whitening(struct geniv_ctx *ctx,
+				  struct crypto_geniv_req_ctx *rctx, u8 *data)
+{
+	struct geniv_tcw_private *tcw = &ctx->iv_gen_private.tcw;
+	__le64 sector = cpu_to_le64(rctx->iv_sector);
+	u8 buf[TCW_WHITENING_SIZE];
+	int i, r;
+	SHASH_DESC_ON_STACK(desc, tcw->crc32_tfm);
+
+	/* xor whitening with sector number */
+	memcpy(buf, tcw->whitening, TCW_WHITENING_SIZE);
+	crypto_xor(buf, (u8 *)&sector, 8);
+	crypto_xor(&buf[8], (u8 *)&sector, 8);
+
+	/* calculate crc32 for every 32bit part and xor it */
+	desc->tfm = tcw->crc32_tfm;
+	desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
+	for (i = 0; i < 4; i++) {
+		r = crypto_shash_init(desc);
+		if (r)
+			goto out;
+		r = crypto_shash_update(desc, &buf[i * 4], 4);
+		if (r)
+			goto out;
+		r = crypto_shash_final(desc, &buf[i * 4]);
+		if (r)
+			goto out;
+	}
+	crypto_xor(&buf[0], &buf[12], 4);
+	crypto_xor(&buf[4], &buf[8], 4);
+
+	/* apply whitening (8 bytes) to whole sector */
+	for (i = 0; i < (SECTOR_SIZE / 8); i++)
+		crypto_xor(data + i * 8, buf, 8);
+out:
+	memzero_explicit(buf, sizeof(buf));
+	return r;
+}
+
+static int crypt_iv_tcw_gen(struct geniv_ctx *ctx,
+			    struct crypto_geniv_req_ctx *rctx, int n)
+{
+	u8 *iv = rctx->iv;
+	struct geniv_tcw_private *tcw = &ctx->iv_gen_private.tcw;
+	__le64 sector = cpu_to_le64(rctx->iv_sector);
+	u8 *src;
+	int r = 0;
+
+	/* Remove whitening from ciphertext */
+	if (!rctx->is_write) {
+		src = kmap_atomic(sg_page(&rctx->src[n]));
+		r = crypt_iv_tcw_whitening(ctx, rctx,
+					   src + rctx->src[n].offset);
+		kunmap_atomic(src);
+	}
+
+	/* Calculate IV */
+	memcpy(iv, tcw->iv_seed, ctx->iv_size);
+	crypto_xor(iv, (u8 *)&sector, 8);
+	if (ctx->iv_size > 8)
+		crypto_xor(&iv[8], (u8 *)&sector, ctx->iv_size - 8);
+
+	return r;
+}
+
+static int crypt_iv_tcw_post(struct geniv_ctx *ctx,
+			     struct crypto_geniv_req_ctx *rctx, int n)
+{
+	u8 *dst;
+	int r;
+
+	if (!rctx->is_write)
+		return 0;
+
+	/* Apply whitening on ciphertext */
+	dst = kmap_atomic(sg_page(&rctx->dst[n]));
+	r = crypt_iv_tcw_whitening(ctx, rctx, dst + rctx->dst[n].offset);
+	kunmap_atomic(dst);
+
+	return r;
+}
+
+static struct geniv_operations crypt_iv_plain_ops = {
+	.generator = crypt_iv_plain_gen
+};
+
+static struct geniv_operations crypt_iv_plain64_ops = {
+	.generator = crypt_iv_plain64_gen
+};
+
+static struct geniv_operations crypt_iv_essiv_ops = {
+	.ctr       = crypt_iv_essiv_ctr,
+	.dtr       = crypt_iv_essiv_dtr,
+	.init      = crypt_iv_essiv_init,
+	.wipe      = crypt_iv_essiv_wipe,
+	.generator = crypt_iv_essiv_gen
+};
+
+static struct geniv_operations crypt_iv_benbi_ops = {
+	.ctr	   = crypt_iv_benbi_ctr,
+	.generator = crypt_iv_benbi_gen
+};
+
+static struct geniv_operations crypt_iv_null_ops = {
+	.generator = crypt_iv_null_gen
+};
+
+static struct geniv_operations crypt_iv_lmk_ops = {
+	.ctr	   = crypt_iv_lmk_ctr,
+	.dtr	   = crypt_iv_lmk_dtr,
+	.init	   = crypt_iv_lmk_init,
+	.wipe	   = crypt_iv_lmk_wipe,
+	.generator = crypt_iv_lmk_gen,
+	.post	   = crypt_iv_lmk_post
+};
+
+static struct geniv_operations crypt_iv_tcw_ops = {
+	.ctr	   = crypt_iv_tcw_ctr,
+	.dtr	   = crypt_iv_tcw_dtr,
+	.init	   = crypt_iv_tcw_init,
+	.wipe	   = crypt_iv_tcw_wipe,
+	.generator = crypt_iv_tcw_gen,
+	.post	   = crypt_iv_tcw_post
+};
+
+static int geniv_setkey_set(struct geniv_ctx *ctx)
+{
+	int ret = 0;
+
+	if (ctx->iv_gen_ops && ctx->iv_gen_ops->init)
+		ret = ctx->iv_gen_ops->init(ctx);
+	return ret;
+}
+
+static int geniv_setkey_wipe(struct geniv_ctx *ctx)
+{
+	int ret = 0;
+
+	if (ctx->iv_gen_ops && ctx->iv_gen_ops->wipe) {
+		ret = ctx->iv_gen_ops->wipe(ctx);
+		if (ret)
+			return ret;
+	}
+	return ret;
+}
+
+static int geniv_setkey_init_ctx(struct geniv_ctx *ctx)
+{
+	int ret = -EINVAL;
+
+	pr_debug("IV Generation algorithm : %s\n", ctx->ivmode);
+
+	if (ctx->ivmode == NULL)
+		ctx->iv_gen_ops = NULL;
+	else if (strcmp(ctx->ivmode, "plain") == 0)
+		ctx->iv_gen_ops = &crypt_iv_plain_ops;
+	else if (strcmp(ctx->ivmode, "plain64") == 0)
+		ctx->iv_gen_ops = &crypt_iv_plain64_ops;
+	else if (strcmp(ctx->ivmode, "essiv") == 0)
+		ctx->iv_gen_ops = &crypt_iv_essiv_ops;
+	else if (strcmp(ctx->ivmode, "benbi") == 0)
+		ctx->iv_gen_ops = &crypt_iv_benbi_ops;
+	else if (strcmp(ctx->ivmode, "null") == 0)
+		ctx->iv_gen_ops = &crypt_iv_null_ops;
+	else if (strcmp(ctx->ivmode, "lmk") == 0)
+		ctx->iv_gen_ops = &crypt_iv_lmk_ops;
+	else if (strcmp(ctx->ivmode, "tcw") == 0) {
+		ctx->iv_gen_ops = &crypt_iv_tcw_ops;
+		ctx->key_parts += 2; /* IV + whitening */
+		ctx->key_extra_size = ctx->iv_size + TCW_WHITENING_SIZE;
+	} else {
+		ret = -EINVAL;
+		pr_err("Invalid IV mode %s\n", ctx->ivmode);
+		goto end;
+	}
+
+	/* Allocate IV */
+	if (ctx->iv_gen_ops && ctx->iv_gen_ops->ctr) {
+		ret = ctx->iv_gen_ops->ctr(ctx);
+		if (ret < 0) {
+			pr_err("Error creating IV for %s\n", ctx->ivmode);
+			goto end;
+		}
+	}
+
+	/* Initialize IV (set keys for ESSIV etc) */
+	if (ctx->iv_gen_ops && ctx->iv_gen_ops->init) {
+		ret = ctx->iv_gen_ops->init(ctx);
+		if (ret < 0)
+			pr_err("Error creating IV for %s\n", ctx->ivmode);
+	}
+	ret = 0;
+end:
+	return ret;
+}
+
+/* Initialize the cipher's context with the key, ivmode and other parameters.
+ * Also allocate IV generation template ciphers and initialize them.
+ */
+
+static int geniv_setkey_init(struct crypto_skcipher *parent,
+			     struct geniv_key_info *info)
+{
+	struct geniv_ctx *ctx = crypto_skcipher_ctx(parent);
+
+	ctx->tfm = parent;
+	ctx->iv_size = crypto_skcipher_ivsize(parent);
+	ctx->tfms_count = info->tfms_count;
+	ctx->cipher = info->cipher;
+	ctx->key = info->key;
+	ctx->key_size = info->key_size;
+	ctx->key_parts = info->key_parts;
+	ctx->ivmode = info->ivmode;
+	ctx->ivopts = info->ivopts;
+	return geniv_setkey_init_ctx(ctx);
+}
+
+static int crypto_geniv_setkey(struct crypto_skcipher *parent,
+				const u8 *key, unsigned int keylen)
+{
+	int err;
+	struct geniv_ctx *ctx = crypto_skcipher_ctx(parent);
+	struct crypto_skcipher *child = ctx->child;
+	struct geniv_key_info *info = (struct geniv_key_info *) key;
+
+	pr_debug("SETKEY Operation : %d\n", info->keyop);
+
+	switch (info->keyop) {
+	case SETKEY_OP_INIT:
+		err = geniv_setkey_init(parent, info);
+		break;
+	case SETKEY_OP_SET:
+		err = geniv_setkey_set(ctx);
+		break;
+	case SETKEY_OP_WIPE:
+		err = geniv_setkey_wipe(ctx);
+		break;
+	}
+
+	crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
+	crypto_skcipher_set_flags(child, crypto_skcipher_get_flags(parent) &
+					 CRYPTO_TFM_REQ_MASK);
+	err = crypto_skcipher_setkey(child, info->subkey, info->subkey_size);
+	crypto_skcipher_set_flags(parent, crypto_skcipher_get_flags(child) &
+					  CRYPTO_TFM_RES_MASK);
+	return err;
+}
+
+/* Asynchronous IO completion callback for each sector in a segment. When all
+ * pending i/o are completed the parent cipher's async function is called.
+ */
+
+static void geniv_async_done(struct crypto_async_request *async_req, int error)
+{
+	struct crypto_geniv_subreq *subreq =
+		(struct crypto_geniv_subreq *) async_req->data;
+	struct crypto_geniv_req_ctx *rctx = subreq->rctx;
+	struct skcipher_request *req = rctx->req;
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct geniv_ctx *ctx = crypto_skcipher_ctx(tfm);
+	int n = subreq - rctx->subreqs;
+
+	/*
+	 * A request from crypto driver backlog is going to be processed now,
+	 * finish the completion and continue in crypt_convert().
+	 * (Callback will be called for the second time for this request.)
+	 */
+	if (error == -EINPROGRESS) {
+		complete(&rctx->restart);
+		return;
+	}
+
+	if (!error && ctx->iv_gen_ops && ctx->iv_gen_ops->post)
+		error = ctx->iv_gen_ops->post(ctx, rctx, n);
+
+	/* req_pending needs to be checked before req->base.complete is called
+	 * as we need 'req_pending' to be equal to 1 to ensure all subrequests
+	 * are processed before freeing subreq array
+	 */
+	if (!atomic_dec_and_test(&rctx->req_pending)) {
+		/* Call the parent cipher's completion function */
+		skcipher_request_complete(req, error);
+		kfree(rctx->subreqs);
+		kfree(rctx->src);
+		kfree(rctx->dst);
+	}
+}
+
+/* Split scatterlist of segments into scatterlist of sectors so that unique IVs
+ * could be generated for each 512-byte sector. This split may not be necessary
+ * for example when these ciphers are modelled in hardware, where in can make
+ * use of the hardware's IV generation capabilities.
+ */
+static unsigned int geniv_split_req(struct scatterlist *sg,
+				    struct scatterlist **sg2_ptr,
+				    unsigned int segments)
+{
+	unsigned int i, j, nents = 0, off, len;
+	struct scatterlist *sg2;
+
+	for (i = 0; i < segments ; i++)
+		nents += sg[i].length / SECTOR_SIZE;
+
+	pr_debug("geniv: splitting scatterlist with %d segments into %d ents\n",
+		 segments, nents);
+	sg2 = kcalloc(nents, sizeof(struct scatterlist), GFP_KERNEL);
+	*sg2_ptr = sg2;
+	for (i = 0, j = 0; i < segments ; i++) {
+
+		off = sg[i].offset;
+		len = sg[i].length;
+
+		for (; len > 0; j++) {
+			sg_set_page(&sg2[j], sg_page(&sg[i]), SECTOR_SIZE, off);
+			off += SECTOR_SIZE;
+			len -= SECTOR_SIZE;
+		}
+	}
+	return nents;
+}
+
+/* Common encryt/decrypt function for geniv template cipher. Before the crypto
+ * operation, it splits the memory segments (in the scatterlist) into 512 byte
+ * sectors. The initialization vector(IV) used is based on a unique sector
+ * number which is generated here.
+ */
+static inline int crypto_geniv_crypt(struct skcipher_request *req, bool encrypt)
+{
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct geniv_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct crypto_geniv_req_ctx *rctx = geniv_req_ctx(req);
+	struct crypto_geniv_subreq *subreqs;
+	struct geniv_req_info *rinfo = (struct geniv_req_info *) req->iv;
+	int i, bytes, cryptlen, ret = 0, n1, n2;
+	char *str = encrypt ? "encrypt" : "decrypt";
+
+	/* Instance of 'struct geniv_req_info' is stored in IV ptr */
+	rctx->is_write = rinfo->is_write;
+	rctx->iv_sector = rinfo->iv_sector;
+	rctx->nents = rinfo->nents;
+	rctx->iv = rinfo->iv;
+
+	pr_debug("geniv:%s: starting sector=%d, #segments=%u\n", str,
+		 (unsigned int) rctx->iv_sector, rctx->nents);
+
+	cryptlen = req->cryptlen;
+	n1 = geniv_split_req(req->src, &rctx->src, rctx->nents);
+	n2 = geniv_split_req(req->dst, &rctx->dst, rctx->nents);
+	rctx->nents = n1 > n2 ? n1 : n2;
+
+	subreqs = kcalloc(rctx->nents, sizeof(struct crypto_geniv_subreq),
+			  GFP_KERNEL);
+	rctx->subreqs = subreqs;
+	rctx->req = req;
+
+	init_completion(&rctx->restart);
+	atomic_set(&rctx->req_pending, 1);
+	for (i = 0; i < rctx->nents; i++) {
+		struct skcipher_request *subreq = &subreqs[i].req;
+
+		subreqs[i].rctx = rctx;
+		atomic_inc(&rctx->req_pending);
+		if (ctx->iv_gen_ops)
+			ret = ctx->iv_gen_ops->generator(ctx, rctx, i);
+
+		if (ret < 0) {
+			pr_err("Error in generating IV ret: %d\n", ret);
+			goto end;
+		}
+
+		skcipher_request_set_tfm(subreq, ctx->child);
+		skcipher_request_set_callback(subreq, req->base.flags,
+					      geniv_async_done, &subreqs[i]);
+
+		bytes = cryptlen < SECTOR_SIZE ? cryptlen : SECTOR_SIZE;
+
+		skcipher_request_set_crypt(subreq, &rctx->src[i],
+					   &rctx->dst[i], bytes, rctx->iv);
+		cryptlen -= bytes;
+
+		if (encrypt)
+			ret = crypto_skcipher_encrypt(subreq);
+		else
+			ret = crypto_skcipher_decrypt(subreq);
+
+
+		if (!ret && ctx->iv_gen_ops && ctx->iv_gen_ops->post)
+			ret = ctx->iv_gen_ops->post(ctx, rctx, i);
+
+		switch (ret) {
+		/*
+		 * The request was queued by a crypto driver
+		 * but the driver request queue is full, let's wait.
+		 */
+		case -EBUSY:
+			wait_for_completion(&rctx->restart);
+			reinit_completion(&rctx->restart);
+			/* fall through */
+		/*
+		 * The request is queued and processed asynchronously,
+		 * completion function geniv_async_done() is called.
+		 */
+		case -EINPROGRESS:
+			rctx->iv_sector++;
+			cond_resched();
+			break;
+		/*
+		 * The request was already processed (synchronously).
+		 */
+		case 0:
+			atomic_dec(&rctx->req_pending);
+			rctx->iv_sector++;
+			cond_resched();
+			continue;
+
+		/* There was an error while processing the request. */
+		default:
+			atomic_dec(&rctx->req_pending);
+			return ret;
+		}
+
+		if (ret)
+			break;
+	}
+
+	if (atomic_read(&rctx->req_pending) == 1) {
+		pr_debug("geniv:%s: Freeing subreq and scatterlists\n", str);
+		kfree(subreqs);
+		kfree(rctx->src);
+		kfree(rctx->dst);
+	}
+
+end:
+	return ret;
+}
+
+static int crypto_geniv_encrypt(struct skcipher_request *req)
+{
+	return crypto_geniv_crypt(req, true);
+}
+
+static int crypto_geniv_decrypt(struct skcipher_request *req)
+{
+	return crypto_geniv_crypt(req, false);
+}
+
+static int crypto_geniv_init_tfm(struct crypto_skcipher *tfm)
+{
+	struct skcipher_instance *inst = skcipher_alg_instance(tfm);
+	struct crypto_skcipher_spawn *spawn = skcipher_instance_ctx(inst);
+	struct geniv_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct crypto_skcipher *cipher;
+	unsigned long align;
+	unsigned int reqsize;
+
+	cipher = crypto_spawn_skcipher2(spawn);
+	if (IS_ERR(cipher))
+		return PTR_ERR(cipher);
+
+	ctx->child = cipher;
+
+	/* Setup the current cipher's request structure */
+	align = crypto_skcipher_alignmask(tfm);
+	align &= ~(crypto_tfm_ctx_alignment() - 1);
+	reqsize = align + sizeof(struct crypto_geniv_req_ctx) +
+		  crypto_skcipher_reqsize(cipher);
+	crypto_skcipher_set_reqsize(tfm, reqsize);
+
+	return 0;
+}
+
+static void crypto_geniv_exit_tfm(struct crypto_skcipher *tfm)
+{
+	struct geniv_ctx *ctx = crypto_skcipher_ctx(tfm);
+
+	if (ctx->iv_gen_ops && ctx->iv_gen_ops->dtr)
+		ctx->iv_gen_ops->dtr(ctx);
+
+	crypto_free_skcipher(ctx->child);
+}
+
+static void crypto_geniv_free(struct skcipher_instance *inst)
+{
+	struct crypto_skcipher_spawn *spawn = skcipher_instance_ctx(inst);
+
+	crypto_drop_skcipher(spawn);
+	kfree(inst);
+}
+
+static int crypto_geniv_create(struct crypto_template *tmpl,
+				 struct rtattr **tb, char *algname)
+{
+	struct crypto_attr_type *algt;
+	struct skcipher_instance *inst;
+	struct skcipher_alg *alg;
+	struct crypto_skcipher_spawn *spawn;
+	const char *cipher_name;
+	int err;
+
+	algt = crypto_get_attr_type(tb);
+
+	if (IS_ERR(algt))
+		return PTR_ERR(algt);
+
+	if ((algt->type ^ CRYPTO_ALG_TYPE_SKCIPHER) & algt->mask)
+		return -EINVAL;
+
+	cipher_name = crypto_attr_alg_name(tb[1]);
+
+	if (IS_ERR(cipher_name))
+		return PTR_ERR(cipher_name);
+
+	inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
+	if (!inst)
+		return -ENOMEM;
+
+	spawn = skcipher_instance_ctx(inst);
+
+	crypto_set_skcipher_spawn(spawn, skcipher_crypto_instance(inst));
+	err = crypto_grab_skcipher2(spawn, cipher_name, 0,
+				    crypto_requires_sync(algt->type,
+							 algt->mask));
+
+	if (err)
+		goto err_free_inst;
+
+	alg = crypto_spawn_skcipher_alg(spawn);
+
+	/* We only support 16-byte blocks. */
+	err = -EINVAL;
+
+	if (!is_power_of_2(alg->base.cra_blocksize))
+		goto err_drop_spawn;
+
+	err = -ENAMETOOLONG;
+	if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, "%s(%s)",
+		     algname, alg->base.cra_name) >= CRYPTO_MAX_ALG_NAME)
+		goto err_drop_spawn;
+	if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
+		     "%s(%s)", algname, alg->base.cra_driver_name) >=
+	    CRYPTO_MAX_ALG_NAME)
+		goto err_drop_spawn;
+
+	inst->alg.base.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER;
+	inst->alg.base.cra_priority = alg->base.cra_priority;
+	inst->alg.base.cra_blocksize = alg->base.cra_blocksize;
+	inst->alg.base.cra_alignmask = alg->base.cra_alignmask;
+	inst->alg.base.cra_flags = alg->base.cra_flags & CRYPTO_ALG_ASYNC;
+	inst->alg.ivsize = alg->base.cra_blocksize;
+	inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg);
+	inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg);
+	inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg);
+
+	inst->alg.setkey = crypto_geniv_setkey;
+	inst->alg.encrypt = crypto_geniv_encrypt;
+	inst->alg.decrypt = crypto_geniv_decrypt;
+
+	inst->alg.base.cra_ctxsize = sizeof(struct geniv_ctx);
+
+	inst->alg.init = crypto_geniv_init_tfm;
+	inst->alg.exit = crypto_geniv_exit_tfm;
+
+	inst->free = crypto_geniv_free;
+
+	err = skcipher_register_instance(tmpl, inst);
+	if (err)
+		goto err_drop_spawn;
+
+out:
+	return err;
+
+err_drop_spawn:
+	crypto_drop_skcipher(spawn);
+err_free_inst:
+	kfree(inst);
+	goto out;
+}
+
+static int crypto_plain_create(struct crypto_template *tmpl,
+				struct rtattr **tb)
+{
+	return crypto_geniv_create(tmpl, tb, "plain");
+}
+
+static int crypto_plain64_create(struct crypto_template *tmpl,
+				struct rtattr **tb)
+{
+	return crypto_geniv_create(tmpl, tb, "plain64");
+}
+
+static int crypto_essiv_create(struct crypto_template *tmpl,
+				struct rtattr **tb)
+{
+	return crypto_geniv_create(tmpl, tb, "essiv");
+}
+
+static int crypto_benbi_create(struct crypto_template *tmpl,
+				struct rtattr **tb)
+{
+	return crypto_geniv_create(tmpl, tb, "benbi");
+}
+
+static int crypto_null_create(struct crypto_template *tmpl,
+				struct rtattr **tb)
+{
+	return crypto_geniv_create(tmpl, tb, "null");
+}
+
+static int crypto_lmk_create(struct crypto_template *tmpl,
+				struct rtattr **tb)
+{
+	return crypto_geniv_create(tmpl, tb, "lmk");
+}
+
+static int crypto_tcw_create(struct crypto_template *tmpl,
+				struct rtattr **tb)
+{
+	return crypto_geniv_create(tmpl, tb, "tcw");
+}
+
+static struct crypto_template crypto_plain_tmpl = {
+	.name   = "plain",
+	.create = crypto_plain_create,
+	.module = THIS_MODULE,
+};
+
+static struct crypto_template crypto_plain64_tmpl = {
+	.name   = "plain64",
+	.create = crypto_plain64_create,
+	.module = THIS_MODULE,
+};
+
+static struct crypto_template crypto_essiv_tmpl = {
+	.name   = "essiv",
+	.create = crypto_essiv_create,
+	.module = THIS_MODULE,
+};
+
+static struct crypto_template crypto_benbi_tmpl = {
+	.name   = "benbi",
+	.create = crypto_benbi_create,
+	.module = THIS_MODULE,
+};
+
+static struct crypto_template crypto_null_tmpl = {
+	.name   = "null",
+	.create = crypto_null_create,
+	.module = THIS_MODULE,
+};
+
+static struct crypto_template crypto_lmk_tmpl = {
+	.name   = "lmk",
+	.create = crypto_lmk_create,
+	.module = THIS_MODULE,
+};
+
+static struct crypto_template crypto_tcw_tmpl = {
+	.name   = "tcw",
+	.create = crypto_tcw_create,
+	.module = THIS_MODULE,
+};
+
+static int __init crypto_geniv_module_init(void)
+{
+	int err;
+
+	err = crypto_register_template(&crypto_plain_tmpl);
+	if (err)
+		goto out;
+
+	err = crypto_register_template(&crypto_plain64_tmpl);
+	if (err)
+		goto out_undo_plain;
+
+	err = crypto_register_template(&crypto_essiv_tmpl);
+	if (err)
+		goto out_undo_plain64;
+
+	err = crypto_register_template(&crypto_benbi_tmpl);
+	if (err)
+		goto out_undo_essiv;
+
+	err = crypto_register_template(&crypto_null_tmpl);
+	if (err)
+		goto out_undo_benbi;
+
+	err = crypto_register_template(&crypto_lmk_tmpl);
+	if (err)
+		goto out_undo_null;
+
+	err = crypto_register_template(&crypto_tcw_tmpl);
+	if (!err)
+		goto out;
+
+	crypto_unregister_template(&crypto_lmk_tmpl);
+out_undo_null:
+	crypto_unregister_template(&crypto_null_tmpl);
+out_undo_benbi:
+	crypto_unregister_template(&crypto_benbi_tmpl);
+out_undo_essiv:
+	crypto_unregister_template(&crypto_essiv_tmpl);
+out_undo_plain64:
+	crypto_unregister_template(&crypto_plain64_tmpl);
+out_undo_plain:
+	crypto_unregister_template(&crypto_plain_tmpl);
+out:
+	return err;
+}
+
+static void __exit crypto_geniv_module_exit(void)
+{
+	crypto_unregister_template(&crypto_plain_tmpl);
+	crypto_unregister_template(&crypto_plain64_tmpl);
+	crypto_unregister_template(&crypto_essiv_tmpl);
+	crypto_unregister_template(&crypto_benbi_tmpl);
+	crypto_unregister_template(&crypto_null_tmpl);
+	crypto_unregister_template(&crypto_lmk_tmpl);
+	crypto_unregister_template(&crypto_tcw_tmpl);
+}
+
+module_init(crypto_geniv_module_init);
+module_exit(crypto_geniv_module_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("IV generation algorithms");
+MODULE_ALIAS_CRYPTO("geniv");
+
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index a276883..1d565d8 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -29,10 +29,12 @@
 #include <crypto/md5.h>
 #include <crypto/algapi.h>
 #include <crypto/skcipher.h>
+#include <crypto/geniv.h>
 
 #include <linux/device-mapper.h>
 
 #define DM_MSG_PREFIX "crypt"
+#define MAX_SG_LIST 1024
 
 /*
  * context holding the current state of a multi-part conversion
@@ -67,47 +69,13 @@ struct dm_crypt_io {
 
 struct dm_crypt_request {
 	struct convert_context *ctx;
-	struct scatterlist sg_in;
-	struct scatterlist sg_out;
+	struct scatterlist *sg_in;
+	struct scatterlist *sg_out;
 	sector_t iv_sector;
 };
 
 struct crypt_config;
 
-struct crypt_iv_operations {
-	int (*ctr)(struct crypt_config *cc, struct dm_target *ti,
-		   const char *opts);
-	void (*dtr)(struct crypt_config *cc);
-	int (*init)(struct crypt_config *cc);
-	int (*wipe)(struct crypt_config *cc);
-	int (*generator)(struct crypt_config *cc, u8 *iv,
-			 struct dm_crypt_request *dmreq);
-	int (*post)(struct crypt_config *cc, u8 *iv,
-		    struct dm_crypt_request *dmreq);
-};
-
-struct iv_essiv_private {
-	struct crypto_ahash *hash_tfm;
-	u8 *salt;
-};
-
-struct iv_benbi_private {
-	int shift;
-};
-
-#define LMK_SEED_SIZE 64 /* hash + 0 */
-struct iv_lmk_private {
-	struct crypto_shash *hash_tfm;
-	u8 *seed;
-};
-
-#define TCW_WHITENING_SIZE 16
-struct iv_tcw_private {
-	struct crypto_shash *crc32_tfm;
-	u8 *iv_seed;
-	u8 *whitening;
-};
-
 /*
  * Crypt: maps a linear range of a block device
  * and encrypts / decrypts at the same time.
@@ -141,13 +109,6 @@ struct crypt_config {
 	char *cipher;
 	char *cipher_string;
 
-	struct crypt_iv_operations *iv_gen_ops;
-	union {
-		struct iv_essiv_private essiv;
-		struct iv_benbi_private benbi;
-		struct iv_lmk_private lmk;
-		struct iv_tcw_private tcw;
-	} iv_gen_private;
 	sector_t iv_offset;
 	unsigned int iv_size;
 
@@ -241,567 +202,6 @@ static struct crypto_skcipher *any_tfm(struct crypt_config *cc)
  * http://article.gmane.org/gmane.linux.kernel.device-mapper.dm-crypt/454
  */
 
-static int crypt_iv_plain_gen(struct crypt_config *cc, u8 *iv,
-			      struct dm_crypt_request *dmreq)
-{
-	memset(iv, 0, cc->iv_size);
-	*(__le32 *)iv = cpu_to_le32(dmreq->iv_sector & 0xffffffff);
-
-	return 0;
-}
-
-static int crypt_iv_plain64_gen(struct crypt_config *cc, u8 *iv,
-				struct dm_crypt_request *dmreq)
-{
-	memset(iv, 0, cc->iv_size);
-	*(__le64 *)iv = cpu_to_le64(dmreq->iv_sector);
-
-	return 0;
-}
-
-/* Initialise ESSIV - compute salt but no local memory allocations */
-static int crypt_iv_essiv_init(struct crypt_config *cc)
-{
-	struct iv_essiv_private *essiv = &cc->iv_gen_private.essiv;
-	AHASH_REQUEST_ON_STACK(req, essiv->hash_tfm);
-	struct scatterlist sg;
-	struct crypto_cipher *essiv_tfm;
-	int err;
-
-	sg_init_one(&sg, cc->key, cc->key_size);
-	ahash_request_set_tfm(req, essiv->hash_tfm);
-	ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP, NULL, NULL);
-	ahash_request_set_crypt(req, &sg, essiv->salt, cc->key_size);
-
-	err = crypto_ahash_digest(req);
-	ahash_request_zero(req);
-	if (err)
-		return err;
-
-	essiv_tfm = cc->iv_private;
-
-	err = crypto_cipher_setkey(essiv_tfm, essiv->salt,
-			    crypto_ahash_digestsize(essiv->hash_tfm));
-	if (err)
-		return err;
-
-	return 0;
-}
-
-/* Wipe salt and reset key derived from volume key */
-static int crypt_iv_essiv_wipe(struct crypt_config *cc)
-{
-	struct iv_essiv_private *essiv = &cc->iv_gen_private.essiv;
-	unsigned salt_size = crypto_ahash_digestsize(essiv->hash_tfm);
-	struct crypto_cipher *essiv_tfm;
-	int r, err = 0;
-
-	memset(essiv->salt, 0, salt_size);
-
-	essiv_tfm = cc->iv_private;
-	r = crypto_cipher_setkey(essiv_tfm, essiv->salt, salt_size);
-	if (r)
-		err = r;
-
-	return err;
-}
-
-/* Set up per cpu cipher state */
-static struct crypto_cipher *setup_essiv_cpu(struct crypt_config *cc,
-					     struct dm_target *ti,
-					     u8 *salt, unsigned saltsize)
-{
-	struct crypto_cipher *essiv_tfm;
-	int err;
-
-	/* Setup the essiv_tfm with the given salt */
-	essiv_tfm = crypto_alloc_cipher(cc->cipher, 0, CRYPTO_ALG_ASYNC);
-	if (IS_ERR(essiv_tfm)) {
-		ti->error = "Error allocating crypto tfm for ESSIV";
-		return essiv_tfm;
-	}
-
-	if (crypto_cipher_blocksize(essiv_tfm) !=
-	    crypto_skcipher_ivsize(any_tfm(cc))) {
-		ti->error = "Block size of ESSIV cipher does "
-			    "not match IV size of block cipher";
-		crypto_free_cipher(essiv_tfm);
-		return ERR_PTR(-EINVAL);
-	}
-
-	err = crypto_cipher_setkey(essiv_tfm, salt, saltsize);
-	if (err) {
-		ti->error = "Failed to set key for ESSIV cipher";
-		crypto_free_cipher(essiv_tfm);
-		return ERR_PTR(err);
-	}
-
-	return essiv_tfm;
-}
-
-static void crypt_iv_essiv_dtr(struct crypt_config *cc)
-{
-	struct crypto_cipher *essiv_tfm;
-	struct iv_essiv_private *essiv = &cc->iv_gen_private.essiv;
-
-	crypto_free_ahash(essiv->hash_tfm);
-	essiv->hash_tfm = NULL;
-
-	kzfree(essiv->salt);
-	essiv->salt = NULL;
-
-	essiv_tfm = cc->iv_private;
-
-	if (essiv_tfm)
-		crypto_free_cipher(essiv_tfm);
-
-	cc->iv_private = NULL;
-}
-
-static int crypt_iv_essiv_ctr(struct crypt_config *cc, struct dm_target *ti,
-			      const char *opts)
-{
-	struct crypto_cipher *essiv_tfm = NULL;
-	struct crypto_ahash *hash_tfm = NULL;
-	u8 *salt = NULL;
-	int err;
-
-	if (!opts) {
-		ti->error = "Digest algorithm missing for ESSIV mode";
-		return -EINVAL;
-	}
-
-	/* Allocate hash algorithm */
-	hash_tfm = crypto_alloc_ahash(opts, 0, CRYPTO_ALG_ASYNC);
-	if (IS_ERR(hash_tfm)) {
-		ti->error = "Error initializing ESSIV hash";
-		err = PTR_ERR(hash_tfm);
-		goto bad;
-	}
-
-	salt = kzalloc(crypto_ahash_digestsize(hash_tfm), GFP_KERNEL);
-	if (!salt) {
-		ti->error = "Error kmallocing salt storage in ESSIV";
-		err = -ENOMEM;
-		goto bad;
-	}
-
-	cc->iv_gen_private.essiv.salt = salt;
-	cc->iv_gen_private.essiv.hash_tfm = hash_tfm;
-
-	essiv_tfm = setup_essiv_cpu(cc, ti, salt,
-				crypto_ahash_digestsize(hash_tfm));
-	if (IS_ERR(essiv_tfm)) {
-		crypt_iv_essiv_dtr(cc);
-		return PTR_ERR(essiv_tfm);
-	}
-	cc->iv_private = essiv_tfm;
-
-	return 0;
-
-bad:
-	if (hash_tfm && !IS_ERR(hash_tfm))
-		crypto_free_ahash(hash_tfm);
-	kfree(salt);
-	return err;
-}
-
-static int crypt_iv_essiv_gen(struct crypt_config *cc, u8 *iv,
-			      struct dm_crypt_request *dmreq)
-{
-	struct crypto_cipher *essiv_tfm = cc->iv_private;
-
-	memset(iv, 0, cc->iv_size);
-	*(__le64 *)iv = cpu_to_le64(dmreq->iv_sector);
-	crypto_cipher_encrypt_one(essiv_tfm, iv, iv);
-
-	return 0;
-}
-
-static int crypt_iv_benbi_ctr(struct crypt_config *cc, struct dm_target *ti,
-			      const char *opts)
-{
-	unsigned bs = crypto_skcipher_blocksize(any_tfm(cc));
-	int log = ilog2(bs);
-
-	/* we need to calculate how far we must shift the sector count
-	 * to get the cipher block count, we use this shift in _gen */
-
-	if (1 << log != bs) {
-		ti->error = "cypher blocksize is not a power of 2";
-		return -EINVAL;
-	}
-
-	if (log > 9) {
-		ti->error = "cypher blocksize is > 512";
-		return -EINVAL;
-	}
-
-	cc->iv_gen_private.benbi.shift = 9 - log;
-
-	return 0;
-}
-
-static void crypt_iv_benbi_dtr(struct crypt_config *cc)
-{
-}
-
-static int crypt_iv_benbi_gen(struct crypt_config *cc, u8 *iv,
-			      struct dm_crypt_request *dmreq)
-{
-	__be64 val;
-
-	memset(iv, 0, cc->iv_size - sizeof(u64)); /* rest is cleared below */
-
-	val = cpu_to_be64(((u64)dmreq->iv_sector << cc->iv_gen_private.benbi.shift) + 1);
-	put_unaligned(val, (__be64 *)(iv + cc->iv_size - sizeof(u64)));
-
-	return 0;
-}
-
-static int crypt_iv_null_gen(struct crypt_config *cc, u8 *iv,
-			     struct dm_crypt_request *dmreq)
-{
-	memset(iv, 0, cc->iv_size);
-
-	return 0;
-}
-
-static void crypt_iv_lmk_dtr(struct crypt_config *cc)
-{
-	struct iv_lmk_private *lmk = &cc->iv_gen_private.lmk;
-
-	if (lmk->hash_tfm && !IS_ERR(lmk->hash_tfm))
-		crypto_free_shash(lmk->hash_tfm);
-	lmk->hash_tfm = NULL;
-
-	kzfree(lmk->seed);
-	lmk->seed = NULL;
-}
-
-static int crypt_iv_lmk_ctr(struct crypt_config *cc, struct dm_target *ti,
-			    const char *opts)
-{
-	struct iv_lmk_private *lmk = &cc->iv_gen_private.lmk;
-
-	lmk->hash_tfm = crypto_alloc_shash("md5", 0, 0);
-	if (IS_ERR(lmk->hash_tfm)) {
-		ti->error = "Error initializing LMK hash";
-		return PTR_ERR(lmk->hash_tfm);
-	}
-
-	/* No seed in LMK version 2 */
-	if (cc->key_parts == cc->tfms_count) {
-		lmk->seed = NULL;
-		return 0;
-	}
-
-	lmk->seed = kzalloc(LMK_SEED_SIZE, GFP_KERNEL);
-	if (!lmk->seed) {
-		crypt_iv_lmk_dtr(cc);
-		ti->error = "Error kmallocing seed storage in LMK";
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-
-static int crypt_iv_lmk_init(struct crypt_config *cc)
-{
-	struct iv_lmk_private *lmk = &cc->iv_gen_private.lmk;
-	int subkey_size = cc->key_size / cc->key_parts;
-
-	/* LMK seed is on the position of LMK_KEYS + 1 key */
-	if (lmk->seed)
-		memcpy(lmk->seed, cc->key + (cc->tfms_count * subkey_size),
-		       crypto_shash_digestsize(lmk->hash_tfm));
-
-	return 0;
-}
-
-static int crypt_iv_lmk_wipe(struct crypt_config *cc)
-{
-	struct iv_lmk_private *lmk = &cc->iv_gen_private.lmk;
-
-	if (lmk->seed)
-		memset(lmk->seed, 0, LMK_SEED_SIZE);
-
-	return 0;
-}
-
-static int crypt_iv_lmk_one(struct crypt_config *cc, u8 *iv,
-			    struct dm_crypt_request *dmreq,
-			    u8 *data)
-{
-	struct iv_lmk_private *lmk = &cc->iv_gen_private.lmk;
-	SHASH_DESC_ON_STACK(desc, lmk->hash_tfm);
-	struct md5_state md5state;
-	__le32 buf[4];
-	int i, r;
-
-	desc->tfm = lmk->hash_tfm;
-	desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
-
-	r = crypto_shash_init(desc);
-	if (r)
-		return r;
-
-	if (lmk->seed) {
-		r = crypto_shash_update(desc, lmk->seed, LMK_SEED_SIZE);
-		if (r)
-			return r;
-	}
-
-	/* Sector is always 512B, block size 16, add data of blocks 1-31 */
-	r = crypto_shash_update(desc, data + 16, 16 * 31);
-	if (r)
-		return r;
-
-	/* Sector is cropped to 56 bits here */
-	buf[0] = cpu_to_le32(dmreq->iv_sector & 0xFFFFFFFF);
-	buf[1] = cpu_to_le32((((u64)dmreq->iv_sector >> 32) & 0x00FFFFFF) | 0x80000000);
-	buf[2] = cpu_to_le32(4024);
-	buf[3] = 0;
-	r = crypto_shash_update(desc, (u8 *)buf, sizeof(buf));
-	if (r)
-		return r;
-
-	/* No MD5 padding here */
-	r = crypto_shash_export(desc, &md5state);
-	if (r)
-		return r;
-
-	for (i = 0; i < MD5_HASH_WORDS; i++)
-		__cpu_to_le32s(&md5state.hash[i]);
-	memcpy(iv, &md5state.hash, cc->iv_size);
-
-	return 0;
-}
-
-static int crypt_iv_lmk_gen(struct crypt_config *cc, u8 *iv,
-			    struct dm_crypt_request *dmreq)
-{
-	u8 *src;
-	int r = 0;
-
-	if (bio_data_dir(dmreq->ctx->bio_in) == WRITE) {
-		src = kmap_atomic(sg_page(&dmreq->sg_in));
-		r = crypt_iv_lmk_one(cc, iv, dmreq, src + dmreq->sg_in.offset);
-		kunmap_atomic(src);
-	} else
-		memset(iv, 0, cc->iv_size);
-
-	return r;
-}
-
-static int crypt_iv_lmk_post(struct crypt_config *cc, u8 *iv,
-			     struct dm_crypt_request *dmreq)
-{
-	u8 *dst;
-	int r;
-
-	if (bio_data_dir(dmreq->ctx->bio_in) == WRITE)
-		return 0;
-
-	dst = kmap_atomic(sg_page(&dmreq->sg_out));
-	r = crypt_iv_lmk_one(cc, iv, dmreq, dst + dmreq->sg_out.offset);
-
-	/* Tweak the first block of plaintext sector */
-	if (!r)
-		crypto_xor(dst + dmreq->sg_out.offset, iv, cc->iv_size);
-
-	kunmap_atomic(dst);
-	return r;
-}
-
-static void crypt_iv_tcw_dtr(struct crypt_config *cc)
-{
-	struct iv_tcw_private *tcw = &cc->iv_gen_private.tcw;
-
-	kzfree(tcw->iv_seed);
-	tcw->iv_seed = NULL;
-	kzfree(tcw->whitening);
-	tcw->whitening = NULL;
-
-	if (tcw->crc32_tfm && !IS_ERR(tcw->crc32_tfm))
-		crypto_free_shash(tcw->crc32_tfm);
-	tcw->crc32_tfm = NULL;
-}
-
-static int crypt_iv_tcw_ctr(struct crypt_config *cc, struct dm_target *ti,
-			    const char *opts)
-{
-	struct iv_tcw_private *tcw = &cc->iv_gen_private.tcw;
-
-	if (cc->key_size <= (cc->iv_size + TCW_WHITENING_SIZE)) {
-		ti->error = "Wrong key size for TCW";
-		return -EINVAL;
-	}
-
-	tcw->crc32_tfm = crypto_alloc_shash("crc32", 0, 0);
-	if (IS_ERR(tcw->crc32_tfm)) {
-		ti->error = "Error initializing CRC32 in TCW";
-		return PTR_ERR(tcw->crc32_tfm);
-	}
-
-	tcw->iv_seed = kzalloc(cc->iv_size, GFP_KERNEL);
-	tcw->whitening = kzalloc(TCW_WHITENING_SIZE, GFP_KERNEL);
-	if (!tcw->iv_seed || !tcw->whitening) {
-		crypt_iv_tcw_dtr(cc);
-		ti->error = "Error allocating seed storage in TCW";
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-
-static int crypt_iv_tcw_init(struct crypt_config *cc)
-{
-	struct iv_tcw_private *tcw = &cc->iv_gen_private.tcw;
-	int key_offset = cc->key_size - cc->iv_size - TCW_WHITENING_SIZE;
-
-	memcpy(tcw->iv_seed, &cc->key[key_offset], cc->iv_size);
-	memcpy(tcw->whitening, &cc->key[key_offset + cc->iv_size],
-	       TCW_WHITENING_SIZE);
-
-	return 0;
-}
-
-static int crypt_iv_tcw_wipe(struct crypt_config *cc)
-{
-	struct iv_tcw_private *tcw = &cc->iv_gen_private.tcw;
-
-	memset(tcw->iv_seed, 0, cc->iv_size);
-	memset(tcw->whitening, 0, TCW_WHITENING_SIZE);
-
-	return 0;
-}
-
-static int crypt_iv_tcw_whitening(struct crypt_config *cc,
-				  struct dm_crypt_request *dmreq,
-				  u8 *data)
-{
-	struct iv_tcw_private *tcw = &cc->iv_gen_private.tcw;
-	__le64 sector = cpu_to_le64(dmreq->iv_sector);
-	u8 buf[TCW_WHITENING_SIZE];
-	SHASH_DESC_ON_STACK(desc, tcw->crc32_tfm);
-	int i, r;
-
-	/* xor whitening with sector number */
-	memcpy(buf, tcw->whitening, TCW_WHITENING_SIZE);
-	crypto_xor(buf, (u8 *)&sector, 8);
-	crypto_xor(&buf[8], (u8 *)&sector, 8);
-
-	/* calculate crc32 for every 32bit part and xor it */
-	desc->tfm = tcw->crc32_tfm;
-	desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
-	for (i = 0; i < 4; i++) {
-		r = crypto_shash_init(desc);
-		if (r)
-			goto out;
-		r = crypto_shash_update(desc, &buf[i * 4], 4);
-		if (r)
-			goto out;
-		r = crypto_shash_final(desc, &buf[i * 4]);
-		if (r)
-			goto out;
-	}
-	crypto_xor(&buf[0], &buf[12], 4);
-	crypto_xor(&buf[4], &buf[8], 4);
-
-	/* apply whitening (8 bytes) to whole sector */
-	for (i = 0; i < ((1 << SECTOR_SHIFT) / 8); i++)
-		crypto_xor(data + i * 8, buf, 8);
-out:
-	memzero_explicit(buf, sizeof(buf));
-	return r;
-}
-
-static int crypt_iv_tcw_gen(struct crypt_config *cc, u8 *iv,
-			    struct dm_crypt_request *dmreq)
-{
-	struct iv_tcw_private *tcw = &cc->iv_gen_private.tcw;
-	__le64 sector = cpu_to_le64(dmreq->iv_sector);
-	u8 *src;
-	int r = 0;
-
-	/* Remove whitening from ciphertext */
-	if (bio_data_dir(dmreq->ctx->bio_in) != WRITE) {
-		src = kmap_atomic(sg_page(&dmreq->sg_in));
-		r = crypt_iv_tcw_whitening(cc, dmreq, src + dmreq->sg_in.offset);
-		kunmap_atomic(src);
-	}
-
-	/* Calculate IV */
-	memcpy(iv, tcw->iv_seed, cc->iv_size);
-	crypto_xor(iv, (u8 *)&sector, 8);
-	if (cc->iv_size > 8)
-		crypto_xor(&iv[8], (u8 *)&sector, cc->iv_size - 8);
-
-	return r;
-}
-
-static int crypt_iv_tcw_post(struct crypt_config *cc, u8 *iv,
-			     struct dm_crypt_request *dmreq)
-{
-	u8 *dst;
-	int r;
-
-	if (bio_data_dir(dmreq->ctx->bio_in) != WRITE)
-		return 0;
-
-	/* Apply whitening on ciphertext */
-	dst = kmap_atomic(sg_page(&dmreq->sg_out));
-	r = crypt_iv_tcw_whitening(cc, dmreq, dst + dmreq->sg_out.offset);
-	kunmap_atomic(dst);
-
-	return r;
-}
-
-static struct crypt_iv_operations crypt_iv_plain_ops = {
-	.generator = crypt_iv_plain_gen
-};
-
-static struct crypt_iv_operations crypt_iv_plain64_ops = {
-	.generator = crypt_iv_plain64_gen
-};
-
-static struct crypt_iv_operations crypt_iv_essiv_ops = {
-	.ctr       = crypt_iv_essiv_ctr,
-	.dtr       = crypt_iv_essiv_dtr,
-	.init      = crypt_iv_essiv_init,
-	.wipe      = crypt_iv_essiv_wipe,
-	.generator = crypt_iv_essiv_gen
-};
-
-static struct crypt_iv_operations crypt_iv_benbi_ops = {
-	.ctr	   = crypt_iv_benbi_ctr,
-	.dtr	   = crypt_iv_benbi_dtr,
-	.generator = crypt_iv_benbi_gen
-};
-
-static struct crypt_iv_operations crypt_iv_null_ops = {
-	.generator = crypt_iv_null_gen
-};
-
-static struct crypt_iv_operations crypt_iv_lmk_ops = {
-	.ctr	   = crypt_iv_lmk_ctr,
-	.dtr	   = crypt_iv_lmk_dtr,
-	.init	   = crypt_iv_lmk_init,
-	.wipe	   = crypt_iv_lmk_wipe,
-	.generator = crypt_iv_lmk_gen,
-	.post	   = crypt_iv_lmk_post
-};
-
-static struct crypt_iv_operations crypt_iv_tcw_ops = {
-	.ctr	   = crypt_iv_tcw_ctr,
-	.dtr	   = crypt_iv_tcw_dtr,
-	.init	   = crypt_iv_tcw_init,
-	.wipe	   = crypt_iv_tcw_wipe,
-	.generator = crypt_iv_tcw_gen,
-	.post	   = crypt_iv_tcw_post
-};
-
 static void crypt_convert_init(struct crypt_config *cc,
 			       struct convert_context *ctx,
 			       struct bio *bio_out, struct bio *bio_in,
@@ -836,52 +236,6 @@ static u8 *iv_of_dmreq(struct crypt_config *cc,
 		crypto_skcipher_alignmask(any_tfm(cc)) + 1);
 }
 
-static int crypt_convert_block(struct crypt_config *cc,
-			       struct convert_context *ctx,
-			       struct skcipher_request *req)
-{
-	struct bio_vec bv_in = bio_iter_iovec(ctx->bio_in, ctx->iter_in);
-	struct bio_vec bv_out = bio_iter_iovec(ctx->bio_out, ctx->iter_out);
-	struct dm_crypt_request *dmreq;
-	u8 *iv;
-	int r;
-
-	dmreq = dmreq_of_req(cc, req);
-	iv = iv_of_dmreq(cc, dmreq);
-
-	dmreq->iv_sector = ctx->cc_sector;
-	dmreq->ctx = ctx;
-	sg_init_table(&dmreq->sg_in, 1);
-	sg_set_page(&dmreq->sg_in, bv_in.bv_page, 1 << SECTOR_SHIFT,
-		    bv_in.bv_offset);
-
-	sg_init_table(&dmreq->sg_out, 1);
-	sg_set_page(&dmreq->sg_out, bv_out.bv_page, 1 << SECTOR_SHIFT,
-		    bv_out.bv_offset);
-
-	bio_advance_iter(ctx->bio_in, &ctx->iter_in, 1 << SECTOR_SHIFT);
-	bio_advance_iter(ctx->bio_out, &ctx->iter_out, 1 << SECTOR_SHIFT);
-
-	if (cc->iv_gen_ops) {
-		r = cc->iv_gen_ops->generator(cc, iv, dmreq);
-		if (r < 0)
-			return r;
-	}
-
-	skcipher_request_set_crypt(req, &dmreq->sg_in, &dmreq->sg_out,
-				   1 << SECTOR_SHIFT, iv);
-
-	if (bio_data_dir(ctx->bio_in) == WRITE)
-		r = crypto_skcipher_encrypt(req);
-	else
-		r = crypto_skcipher_decrypt(req);
-
-	if (!r && cc->iv_gen_ops && cc->iv_gen_ops->post)
-		r = cc->iv_gen_ops->post(cc, iv, dmreq);
-
-	return r;
-}
-
 static void kcryptd_async_done(struct crypto_async_request *async_req,
 			       int error);
 
@@ -916,57 +270,94 @@ static void crypt_free_req(struct crypt_config *cc,
 /*
  * Encrypt / decrypt data from one bio to another one (can be the same one)
  */
-static int crypt_convert(struct crypt_config *cc,
-			 struct convert_context *ctx)
+
+static int crypt_convert_bio(struct crypt_config *cc,
+			     struct convert_context *ctx)
 {
+	unsigned int cryptlen, n1, n2, nents, i = 0, bytes = 0;
+	struct skcipher_request *req;
+	struct dm_crypt_request *dmreq;
+	struct geniv_req_info rinfo;
+	struct bio_vec bv_in, bv_out;
 	int r;
+	u8 *iv;
 
 	atomic_set(&ctx->cc_pending, 1);
+	crypt_alloc_req(cc, ctx);
 
-	while (ctx->iter_in.bi_size && ctx->iter_out.bi_size) {
+	req = ctx->req;
+	dmreq = dmreq_of_req(cc, req);
+	iv = iv_of_dmreq(cc, dmreq);
 
-		crypt_alloc_req(cc, ctx);
+	n1 = bio_segments(ctx->bio_in);
+	n2 = bio_segments(ctx->bio_in);
+	nents = n1 > n2 ? n1 : n2;
+	nents = nents > MAX_SG_LIST ? MAX_SG_LIST : nents;
+	cryptlen = ctx->iter_in.bi_size;
 
-		atomic_inc(&ctx->cc_pending);
+	DMDEBUG("dm-crypt:%s: segments:[in=%u, out=%u] bi_size=%u\n",
+		bio_data_dir(ctx->bio_in) == WRITE ? "write" : "read",
+		n1, n2, cryptlen);
 
-		r = crypt_convert_block(cc, ctx, ctx->req);
+	dmreq->sg_in  = kcalloc(nents, sizeof(struct scatterlist), GFP_KERNEL);
+	dmreq->sg_out = kcalloc(nents, sizeof(struct scatterlist), GFP_KERNEL);
 
-		switch (r) {
-		/*
-		 * The request was queued by a crypto driver
-		 * but the driver request queue is full, let's wait.
-		 */
-		case -EBUSY:
-			wait_for_completion(&ctx->restart);
-			reinit_completion(&ctx->restart);
-			/* fall through */
-		/*
-		 * The request is queued and processed asynchronously,
-		 * completion function kcryptd_async_done() will be called.
-		 */
-		case -EINPROGRESS:
-			ctx->req = NULL;
-			ctx->cc_sector++;
-			continue;
-		/*
-		 * The request was already processed (synchronously).
-		 */
-		case 0:
-			atomic_dec(&ctx->cc_pending);
-			ctx->cc_sector++;
-			cond_resched();
-			continue;
-
-		/* There was an error while processing the request. */
-		default:
-			atomic_dec(&ctx->cc_pending);
-			return r;
-		}
+	dmreq->ctx = ctx;
+
+	sg_init_table(dmreq->sg_in, nents);
+	sg_init_table(dmreq->sg_out, nents);
+
+	while (ctx->iter_in.bi_size && ctx->iter_out.bi_size && i < nents) {
+		bv_in = bio_iter_iovec(ctx->bio_in, ctx->iter_in);
+		bv_out = bio_iter_iovec(ctx->bio_out, ctx->iter_out);
+
+		sg_set_page(&dmreq->sg_in[i], bv_in.bv_page, bv_in.bv_len,
+			    bv_in.bv_offset);
+		sg_set_page(&dmreq->sg_out[i], bv_out.bv_page, bv_out.bv_len,
+			    bv_out.bv_offset);
+
+		bio_advance_iter(ctx->bio_in, &ctx->iter_in, bv_in.bv_len);
+		bio_advance_iter(ctx->bio_out, &ctx->iter_out, bv_out.bv_len);
+
+		bytes += bv_in.bv_len;
+		i++;
 	}
 
-	return 0;
+	DMDEBUG("dm-crypt: Processed %u of %u bytes\n", bytes, cryptlen);
+
+	rinfo.is_write = bio_data_dir(ctx->bio_in) == WRITE;
+	rinfo.iv_sector = ctx->cc_sector;
+	rinfo.nents = nents;
+	rinfo.iv = iv;
+
+	skcipher_request_set_crypt(req, dmreq->sg_in, dmreq->sg_out,
+				   bytes, &rinfo);
+
+	if (bio_data_dir(ctx->bio_in) == WRITE)
+		r = crypto_skcipher_encrypt(req);
+	else
+		r = crypto_skcipher_decrypt(req);
+
+	switch (r) {
+	/* The request was queued so wait. */
+	case -EBUSY:
+		wait_for_completion(&ctx->restart);
+		reinit_completion(&ctx->restart);
+		/* fall through */
+	/*
+	 * The request is queued and processed asynchronously,
+	 * completion function kcryptd_async_done() is called.
+	 */
+	case -EINPROGRESS:
+		ctx->req = NULL;
+		cond_resched();
+		break;
+	}
+
+	return r;
 }
 
+
 static void crypt_free_buffer_pages(struct crypt_config *cc, struct bio *clone);
 
 /*
@@ -1072,11 +463,17 @@ static void crypt_dec_pending(struct dm_crypt_io *io)
 {
 	struct crypt_config *cc = io->cc;
 	struct bio *base_bio = io->base_bio;
+	struct dm_crypt_request *dmreq;
 	int error = io->error;
 
 	if (!atomic_dec_and_test(&io->io_pending))
 		return;
 
+	dmreq = dmreq_of_req(cc, io->ctx.req);
+	DMDEBUG("dm-crypt: Freeing scatterlists [sync]\n");
+	kfree(dmreq->sg_in);
+	kfree(dmreq->sg_out);
+
 	if (io->ctx.req)
 		crypt_free_req(cc, io->ctx.req, base_bio);
 
@@ -1315,7 +712,7 @@ static void kcryptd_crypt_write_convert(struct dm_crypt_io *io)
 	sector += bio_sectors(clone);
 
 	crypt_inc_pending(io);
-	r = crypt_convert(cc, &io->ctx);
+	r = crypt_convert_bio(cc, &io->ctx);
 	if (r)
 		io->error = -EIO;
 	crypt_finished = atomic_dec_and_test(&io->ctx.cc_pending);
@@ -1345,7 +742,8 @@ static void kcryptd_crypt_read_convert(struct dm_crypt_io *io)
 	crypt_convert_init(cc, &io->ctx, io->base_bio, io->base_bio,
 			   io->sector);
 
-	r = crypt_convert(cc, &io->ctx);
+	r = crypt_convert_bio(cc, &io->ctx);
+
 	if (r < 0)
 		io->error = -EIO;
 
@@ -1373,12 +771,13 @@ static void kcryptd_async_done(struct crypto_async_request *async_req,
 		return;
 	}
 
-	if (!error && cc->iv_gen_ops && cc->iv_gen_ops->post)
-		error = cc->iv_gen_ops->post(cc, iv_of_dmreq(cc, dmreq), dmreq);
-
 	if (error < 0)
 		io->error = -EIO;
 
+	DMDEBUG("dm-crypt: Freeing scatterlists and request struct [async]\n");
+	kfree(dmreq->sg_in);
+	kfree(dmreq->sg_out);
+
 	crypt_free_req(cc, req_of_dmreq(cc, dmreq), io->base_bio);
 
 	if (!atomic_dec_and_test(&ctx->cc_pending))
@@ -1471,7 +870,8 @@ static int crypt_alloc_tfms(struct crypt_config *cc, char *ciphermode)
 	return 0;
 }
 
-static int crypt_setkey_allcpus(struct crypt_config *cc)
+static int crypt_setkey_allcpus(struct crypt_config *cc, enum setkey_op keyop,
+				char *ivmode, char *ivopts)
 {
 	unsigned subkey_size;
 	int err = 0, i, r;
@@ -1480,9 +880,13 @@ static int crypt_setkey_allcpus(struct crypt_config *cc)
 	subkey_size = (cc->key_size - cc->key_extra_size) >> ilog2(cc->tfms_count);
 
 	for (i = 0; i < cc->tfms_count; i++) {
-		r = crypto_skcipher_setkey(cc->tfms[i],
-					   cc->key + (i * subkey_size),
-					   subkey_size);
+		DECLARE_GENIV_KEY(kinfo, keyop, cc->tfms_count, cc->cipher,
+				  cc->key, cc->key_size,
+				  cc->key + (subkey_size * i), subkey_size,
+				  cc->key_parts, ivmode, ivopts);
+
+		r = crypto_skcipher_setkey(cc->tfms[i], (u8 *) &kinfo,
+					   sizeof(kinfo));
 		if (r)
 			err = r;
 	}
@@ -1490,7 +894,8 @@ static int crypt_setkey_allcpus(struct crypt_config *cc)
 	return err;
 }
 
-static int crypt_set_key(struct crypt_config *cc, char *key)
+static int crypt_set_key(struct crypt_config *cc, enum setkey_op keyop,
+			 char *key, char *ivmode, char *ivopts)
 {
 	int r = -EINVAL;
 	int key_string_len = strlen(key);
@@ -1508,7 +913,7 @@ static int crypt_set_key(struct crypt_config *cc, char *key)
 
 	set_bit(DM_CRYPT_KEY_VALID, &cc->flags);
 
-	r = crypt_setkey_allcpus(cc);
+	r = crypt_setkey_allcpus(cc, keyop, ivmode, ivopts);
 
 out:
 	/* Hex key string not needed after here, so wipe it. */
@@ -1517,12 +922,24 @@ static int crypt_set_key(struct crypt_config *cc, char *key)
 	return r;
 }
 
+static int crypt_init_all_cpus(struct dm_target *ti, char *key,
+			       char *ivmode, char *ivopts)
+{
+	struct crypt_config *cc = ti->private;
+	int ret;
+
+	ret = crypt_set_key(cc, SETKEY_OP_INIT, key, ivmode, ivopts);
+	if (ret < 0)
+		ti->error = "Error decoding and setting key";
+	return ret;
+}
+
 static int crypt_wipe_key(struct crypt_config *cc)
 {
 	clear_bit(DM_CRYPT_KEY_VALID, &cc->flags);
 	memset(&cc->key, 0, cc->key_size * sizeof(u8));
 
-	return crypt_setkey_allcpus(cc);
+	return crypt_setkey_allcpus(cc, SETKEY_OP_WIPE, NULL, NULL);
 }
 
 static void crypt_dtr(struct dm_target *ti)
@@ -1550,9 +967,6 @@ static void crypt_dtr(struct dm_target *ti)
 	mempool_destroy(cc->page_pool);
 	mempool_destroy(cc->req_pool);
 
-	if (cc->iv_gen_ops && cc->iv_gen_ops->dtr)
-		cc->iv_gen_ops->dtr(cc);
-
 	if (cc->dev)
 		dm_put_device(ti, cc->dev);
 
@@ -1629,8 +1043,16 @@ static int crypt_ctr_cipher(struct dm_target *ti,
 	if (!cipher_api)
 		goto bad_mem;
 
-	ret = snprintf(cipher_api, CRYPTO_MAX_ALG_NAME,
-		       "%s(%s)", chainmode, cipher);
+create_cipher:
+	/* For those ciphers which do not support IVs,
+	 * use the 'null' template cipher
+	 */
+
+	if (!ivmode)
+		ivmode = "null";
+
+	ret = snprintf(cipher_api, CRYPTO_MAX_ALG_NAME, "%s(%s(%s))",
+		       ivmode, chainmode, cipher);
 	if (ret < 0) {
 		kfree(cipher_api);
 		goto bad_mem;
@@ -1652,23 +1074,10 @@ static int crypt_ctr_cipher(struct dm_target *ti,
 	else if (ivmode) {
 		DMWARN("Selected cipher does not support IVs");
 		ivmode = NULL;
+		goto create_cipher;
 	}
 
-	/* Choose ivmode, see comments at iv code. */
-	if (ivmode == NULL)
-		cc->iv_gen_ops = NULL;
-	else if (strcmp(ivmode, "plain") == 0)
-		cc->iv_gen_ops = &crypt_iv_plain_ops;
-	else if (strcmp(ivmode, "plain64") == 0)
-		cc->iv_gen_ops = &crypt_iv_plain64_ops;
-	else if (strcmp(ivmode, "essiv") == 0)
-		cc->iv_gen_ops = &crypt_iv_essiv_ops;
-	else if (strcmp(ivmode, "benbi") == 0)
-		cc->iv_gen_ops = &crypt_iv_benbi_ops;
-	else if (strcmp(ivmode, "null") == 0)
-		cc->iv_gen_ops = &crypt_iv_null_ops;
-	else if (strcmp(ivmode, "lmk") == 0) {
-		cc->iv_gen_ops = &crypt_iv_lmk_ops;
+	if (strcmp(ivmode, "lmk") == 0) {
 		/*
 		 * Version 2 and 3 is recognised according
 		 * to length of provided multi-key string.
@@ -1680,39 +1089,14 @@ static int crypt_ctr_cipher(struct dm_target *ti,
 			cc->key_extra_size = cc->key_size / cc->key_parts;
 		}
 	} else if (strcmp(ivmode, "tcw") == 0) {
-		cc->iv_gen_ops = &crypt_iv_tcw_ops;
 		cc->key_parts += 2; /* IV + whitening */
 		cc->key_extra_size = cc->iv_size + TCW_WHITENING_SIZE;
-	} else {
-		ret = -EINVAL;
-		ti->error = "Invalid IV mode";
-		goto bad;
 	}
 
 	/* Initialize and set key */
-	ret = crypt_set_key(cc, key);
-	if (ret < 0) {
-		ti->error = "Error decoding and setting key";
+	ret = crypt_init_all_cpus(ti, key, ivmode, ivopts);
+	if (ret < 0)
 		goto bad;
-	}
-
-	/* Allocate IV */
-	if (cc->iv_gen_ops && cc->iv_gen_ops->ctr) {
-		ret = cc->iv_gen_ops->ctr(cc, ti, ivopts);
-		if (ret < 0) {
-			ti->error = "Error creating IV";
-			goto bad;
-		}
-	}
-
-	/* Initialize IV (set keys for ESSIV etc) */
-	if (cc->iv_gen_ops && cc->iv_gen_ops->init) {
-		ret = cc->iv_gen_ops->init(cc);
-		if (ret < 0) {
-			ti->error = "Error initialising IV";
-			goto bad;
-		}
-	}
 
 	ret = 0;
 bad:
@@ -1934,8 +1318,9 @@ static int crypt_map(struct dm_target *ti, struct bio *bio)
 	if (bio_data_dir(io->base_bio) == READ) {
 		if (kcryptd_io_read(io, GFP_NOWAIT))
 			kcryptd_queue_read(io);
-	} else
+	} else {
 		kcryptd_queue_crypt(io);
+	}
 
 	return DM_MAPIO_SUBMITTED;
 }
@@ -2014,7 +1399,6 @@ static void crypt_resume(struct dm_target *ti)
 static int crypt_message(struct dm_target *ti, unsigned argc, char **argv)
 {
 	struct crypt_config *cc = ti->private;
-	int ret = -EINVAL;
 
 	if (argc < 2)
 		goto error;
@@ -2025,19 +1409,9 @@ static int crypt_message(struct dm_target *ti, unsigned argc, char **argv)
 			return -EINVAL;
 		}
 		if (argc == 3 && !strcasecmp(argv[1], "set")) {
-			ret = crypt_set_key(cc, argv[2]);
-			if (ret)
-				return ret;
-			if (cc->iv_gen_ops && cc->iv_gen_ops->init)
-				ret = cc->iv_gen_ops->init(cc);
-			return ret;
+			return crypt_set_key(cc, SETKEY_OP_SET, argv[2], 0, 0);
 		}
 		if (argc == 2 && !strcasecmp(argv[1], "wipe")) {
-			if (cc->iv_gen_ops && cc->iv_gen_ops->wipe) {
-				ret = cc->iv_gen_ops->wipe(cc);
-				if (ret)
-					return ret;
-			}
 			return crypt_wipe_key(cc);
 		}
 	}
diff --git a/include/crypto/geniv.h b/include/crypto/geniv.h
new file mode 100644
index 0000000..df9f953
--- /dev/null
+++ b/include/crypto/geniv.h
@@ -0,0 +1,60 @@
+/*
+ * geniv: common data structures for IV generation algorithms
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+#ifndef _CRYPTO_GENIV_
+#define _CRYPTO_GENIV_
+
+#define SECTOR_SHIFT		9
+#define SECTOR_SIZE		(1 << SECTOR_SHIFT)
+
+#define LMK_SEED_SIZE		64 /* hash + 0 */
+#define TCW_WHITENING_SIZE	16
+
+enum setkey_op {
+	SETKEY_OP_INIT,
+	SETKEY_OP_SET,
+	SETKEY_OP_WIPE,
+};
+
+struct geniv_key_info {
+	enum setkey_op keyop;
+	unsigned int tfms_count;
+	char *cipher;
+	u8 *key;
+	u8 *subkey;
+	unsigned int key_size;
+	unsigned int subkey_size;
+	unsigned int key_parts;
+	char *ivmode;
+	char *ivopts;
+};
+
+#define DECLARE_GENIV_KEY(c, op, n, p, k, sz, skey, ssz, kp, m, opts)	\
+	struct geniv_key_info c = {					\
+		.keyop = op,						\
+		.tfms_count = n,					\
+		.cipher = p,						\
+		.key = k,						\
+		.key_size = sz,						\
+		.subkey = skey,						\
+		.subkey_size = ssz,					\
+		.key_parts = kp,					\
+		.ivmode = m,						\
+		.ivopts = opts,						\
+	}
+
+struct geniv_req_info {
+	bool is_write;
+	sector_t iv_sector;
+	unsigned int nents;
+	u8 *iv;
+};
+
+#endif
+
