diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 7c6c572..7275b0f 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -32,170 +32,113 @@
 #include <crypto/algapi.h>
 #include <crypto/skcipher.h>
 #include <keys/user-type.h>
-
 #include <linux/device-mapper.h>
-
-#define DM_MSG_PREFIX "crypt"
-
-/*
- * context holding the current state of a multi-part conversion
- */
-struct convert_context {
-	struct completion restart;
-	struct bio *bio_in;
-	struct bio *bio_out;
-	struct bvec_iter iter_in;
-	struct bvec_iter iter_out;
-	sector_t cc_sector;
-	atomic_t cc_pending;
-	struct skcipher_request *req;
+#include <crypto/internal/skcipher.h>
+#include <linux/backing-dev.h>
+#include <linux/log2.h>
+#include <crypto/geniv.h>
+
+#define DM_MSG_PREFIX		"crypt"
+#define MAX_SG_LIST		(BIO_MAX_PAGES * 8)
+#define MIN_IOS			64
+#define LMK_SEED_SIZE		64 /* hash + 0 */
+#define TCW_WHITENING_SIZE	16
+
+struct geniv_ctx;
+struct geniv_req_ctx;
+
+/* Sub request for each of the skcipher_request's for a segment */
+struct geniv_subreq {
+	struct skcipher_request req CRYPTO_MINALIGN_ATTR;
+	struct scatterlist src;
+	struct scatterlist dst;
+	int n;
+	struct geniv_req_ctx *rctx;
 };
 
-/*
- * per bio private data
- */
-struct dm_crypt_io {
-	struct crypt_config *cc;
-	struct bio *base_bio;
-	struct work_struct work;
-
-	struct convert_context ctx;
-
-	atomic_t io_pending;
-	int error;
-	sector_t sector;
-
-	struct rb_node rb_node;
-} CRYPTO_MINALIGN_ATTR;
-
-struct dm_crypt_request {
-	struct convert_context *ctx;
-	struct scatterlist sg_in;
-	struct scatterlist sg_out;
+struct geniv_req_ctx {
+	struct geniv_subreq *subreq;
+	bool is_write;
 	sector_t iv_sector;
+	unsigned int nents;
+	u8 *iv;
+	struct completion restart;
+	atomic_t req_pending;
+	struct skcipher_request *req;
 };
 
-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);
+	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 geniv_req_ctx *rctx,
+			 struct geniv_subreq *subreq);
+	int (*post)(struct geniv_ctx *ctx,
+		    struct geniv_req_ctx *rctx,
+		    struct geniv_subreq *subreq);
 };
 
-struct iv_essiv_private {
+struct geniv_essiv_private {
 	struct crypto_ahash *hash_tfm;
 	u8 *salt;
 };
 
-struct iv_benbi_private {
+struct geniv_benbi_private {
 	int shift;
 };
 
-#define LMK_SEED_SIZE 64 /* hash + 0 */
-struct iv_lmk_private {
+struct geniv_lmk_private {
 	struct crypto_shash *hash_tfm;
 	u8 *seed;
 };
 
-#define TCW_WHITENING_SIZE 16
-struct iv_tcw_private {
+struct geniv_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.
- */
-enum flags { DM_CRYPT_SUSPENDED, DM_CRYPT_KEY_VALID,
-	     DM_CRYPT_SAME_CPU, DM_CRYPT_NO_OFFLOAD };
-
-/*
- * The fields in here must be read only after initialization.
- */
-struct crypt_config {
-	struct dm_dev *dev;
-	sector_t start;
-
-	/*
-	 * pool for per bio private data, crypto requests and
-	 * encryption requeusts/buffer pages
-	 */
-	mempool_t *req_pool;
-	mempool_t *page_pool;
-	struct bio_set *bs;
-	struct mutex bio_alloc_lock;
-
-	struct workqueue_struct *io_queue;
-	struct workqueue_struct *crypt_queue;
-
-	struct task_struct *write_thread;
-	wait_queue_head_t write_thread_wait;
-	struct rb_root write_tree;
-
+struct geniv_ctx {
+	unsigned int tfms_count;
+	struct crypto_skcipher *child;
+	struct crypto_skcipher **tfms;
+	char *ivmode;
+	unsigned int iv_size;
+	char *ivopts;
 	char *cipher;
-	char *cipher_string;
-	char *key_string;
-
+	char *ciphermode;
 	const 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;
+		struct geniv_essiv_private essiv;
+		struct geniv_benbi_private benbi;
+		struct geniv_lmk_private lmk;
+		struct geniv_tcw_private tcw;
 	} iv_gen_private;
-	sector_t iv_offset;
-	unsigned int iv_size;
-
-	/* ESSIV: struct crypto_cipher *essiv_tfm */
 	void *iv_private;
-	struct crypto_skcipher **tfms;
-	unsigned tfms_count;
-
-	/*
-	 * Layout of each crypto request:
-	 *
-	 *   struct skcipher_request
-	 *      context
-	 *      padding
-	 *   struct dm_crypt_request
-	 *      padding
-	 *   IV
-	 *
-	 * The padding is added so that dm_crypt_request and the IV are
-	 * correctly aligned.
-	 */
-	unsigned int dmreq_start;
-
-	unsigned int per_bio_data_size;
-
-	unsigned long flags;
+	struct crypto_skcipher *tfm;
+	mempool_t *subreq_pool;
 	unsigned int key_size;
+	unsigned int key_extra_size;
 	unsigned int key_parts;      /* independent parts in key buffer */
-	unsigned int key_extra_size; /* additional keys length */
-	u8 key[0];
+	enum setkey_op keyop;
+	char *msg;
+	u8 *key;
 };
 
-#define MIN_IOS        64
-
-static void clone_init(struct dm_crypt_io *, struct bio *);
-static void kcryptd_queue_crypt(struct dm_crypt_io *io);
-static u8 *iv_of_dmreq(struct crypt_config *cc, struct dm_crypt_request *dmreq);
+static struct crypto_skcipher *any_tfm(struct geniv_ctx *ctx)
+{
+	return ctx->tfms[0];
+}
 
-/*
- * Use this to access cipher attributes that are the same for each CPU.
- */
-static struct crypto_skcipher *any_tfm(struct crypt_config *cc)
+static inline
+struct geniv_req_ctx *geniv_req_ctx(struct skcipher_request *req)
 {
-	return cc->tfms[0];
+	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);
 }
 
 /*
@@ -245,44 +188,50 @@ 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)
+static int crypt_iv_plain_gen(struct geniv_ctx *ctx,
+			      struct geniv_req_ctx *rctx,
+			      struct geniv_subreq *subreq)
 {
-	memset(iv, 0, cc->iv_size);
-	*(__le32 *)iv = cpu_to_le32(dmreq->iv_sector & 0xffffffff);
+	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 crypt_config *cc, u8 *iv,
-				struct dm_crypt_request *dmreq)
+static int crypt_iv_plain64_gen(struct geniv_ctx *ctx,
+				struct geniv_req_ctx *rctx,
+				struct geniv_subreq *subreq)
 {
-	memset(iv, 0, cc->iv_size);
-	*(__le64 *)iv = cpu_to_le64(dmreq->iv_sector);
+	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 crypt_config *cc)
+static int crypt_iv_essiv_init(struct geniv_ctx *ctx)
 {
-	struct iv_essiv_private *essiv = &cc->iv_gen_private.essiv;
-	AHASH_REQUEST_ON_STACK(req, essiv->hash_tfm);
+	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, cc->key, cc->key_size);
+	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, cc->key_size);
+	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 = cc->iv_private;
+	essiv_tfm = ctx->iv_private;
 
 	err = crypto_cipher_setkey(essiv_tfm, essiv->salt,
 			    crypto_ahash_digestsize(essiv->hash_tfm));
@@ -293,16 +242,16 @@ static int crypt_iv_essiv_init(struct crypt_config *cc)
 }
 
 /* Wipe salt and reset key derived from volume key */
-static int crypt_iv_essiv_wipe(struct crypt_config *cc)
+static int crypt_iv_essiv_wipe(struct geniv_ctx *ctx)
 {
-	struct iv_essiv_private *essiv = &cc->iv_gen_private.essiv;
-	unsigned salt_size = crypto_ahash_digestsize(essiv->hash_tfm);
+	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 = cc->iv_private;
+	essiv_tfm = ctx->iv_private;
 	r = crypto_cipher_setkey(essiv_tfm, essiv->salt, salt_size);
 	if (r)
 		err = r;
@@ -311,42 +260,40 @@ static int crypt_iv_essiv_wipe(struct crypt_config *cc)
 }
 
 /* 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)
+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(cc->cipher, 0, CRYPTO_ALG_ASYNC);
+	essiv_tfm = crypto_alloc_cipher(ctx->cipher, 0, CRYPTO_ALG_ASYNC);
+
 	if (IS_ERR(essiv_tfm)) {
-		ti->error = "Error allocating crypto tfm for ESSIV";
+		DMERR("Error allocating crypto tfm for ESSIV\n");
 		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_skcipher_ivsize(any_tfm(ctx))) {
+		DMERR("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) {
-		ti->error = "Failed to set key for ESSIV cipher";
+		DMERR("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 crypt_config *cc)
+static void crypt_iv_essiv_dtr(struct geniv_ctx *ctx)
 {
 	struct crypto_cipher *essiv_tfm;
-	struct iv_essiv_private *essiv = &cc->iv_gen_private.essiv;
+	struct geniv_essiv_private *essiv = &ctx->iv_gen_private.essiv;
 
 	crypto_free_ahash(essiv->hash_tfm);
 	essiv->hash_tfm = NULL;
@@ -354,52 +301,50 @@ static void crypt_iv_essiv_dtr(struct crypt_config *cc)
 	kzfree(essiv->salt);
 	essiv->salt = NULL;
 
-	essiv_tfm = cc->iv_private;
+	essiv_tfm = ctx->iv_private;
 
 	if (essiv_tfm)
 		crypto_free_cipher(essiv_tfm);
 
-	cc->iv_private = NULL;
+	ctx->iv_private = NULL;
 }
 
-static int crypt_iv_essiv_ctr(struct crypt_config *cc, struct dm_target *ti,
-			      const char *opts)
+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 (!opts) {
-		ti->error = "Digest algorithm missing for ESSIV mode";
+	if (!ctx->ivopts) {
+		DMERR("Digest algorithm missing for ESSIV mode\n");
 		return -EINVAL;
 	}
 
 	/* Allocate hash algorithm */
-	hash_tfm = crypto_alloc_ahash(opts, 0, CRYPTO_ALG_ASYNC);
+	hash_tfm = crypto_alloc_ahash(ctx->ivopts, 0, CRYPTO_ALG_ASYNC);
 	if (IS_ERR(hash_tfm)) {
-		ti->error = "Error initializing ESSIV hash";
 		err = PTR_ERR(hash_tfm);
+		DMERR("Error initializing ESSIV hash. err=%d\n", err);
 		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;
+	ctx->iv_gen_private.essiv.salt = salt;
+	ctx->iv_gen_private.essiv.hash_tfm = hash_tfm;
 
-	essiv_tfm = setup_essiv_cpu(cc, ti, salt,
+	essiv_tfm = setup_essiv_cpu(ctx, salt,
 				crypto_ahash_digestsize(hash_tfm));
 	if (IS_ERR(essiv_tfm)) {
-		crypt_iv_essiv_dtr(cc);
+		crypt_iv_essiv_dtr(ctx);
 		return PTR_ERR(essiv_tfm);
 	}
-	cc->iv_private = essiv_tfm;
+	ctx->iv_private = essiv_tfm;
 
 	return 0;
 
@@ -410,70 +355,73 @@ static int crypt_iv_essiv_ctr(struct crypt_config *cc, struct dm_target *ti,
 	return err;
 }
 
-static int crypt_iv_essiv_gen(struct crypt_config *cc, u8 *iv,
-			      struct dm_crypt_request *dmreq)
+static int crypt_iv_essiv_gen(struct geniv_ctx *ctx,
+			      struct geniv_req_ctx *rctx,
+			      struct geniv_subreq *subreq)
 {
-	struct crypto_cipher *essiv_tfm = cc->iv_private;
+	u8 *iv = rctx->iv;
+	struct crypto_cipher *essiv_tfm = ctx->iv_private;
 
-	memset(iv, 0, cc->iv_size);
-	*(__le64 *)iv = cpu_to_le64(dmreq->iv_sector);
+	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 crypt_config *cc, struct dm_target *ti,
-			      const char *opts)
+static int crypt_iv_benbi_ctr(struct geniv_ctx *ctx)
 {
-	unsigned bs = crypto_skcipher_blocksize(any_tfm(cc));
+	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 */
+	 * 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";
+		DMERR("cypher blocksize is not a power of 2\n");
 		return -EINVAL;
 	}
 
 	if (log > 9) {
-		ti->error = "cypher blocksize is > 512";
+		DMERR("cypher blocksize is > 512\n");
 		return -EINVAL;
 	}
 
-	cc->iv_gen_private.benbi.shift = 9 - log;
+	ctx->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)
+static int crypt_iv_benbi_gen(struct geniv_ctx *ctx,
+			      struct geniv_req_ctx *rctx,
+			      struct geniv_subreq *subreq)
 {
+	u8 *iv = rctx->iv;
 	__be64 val;
 
-	memset(iv, 0, cc->iv_size - sizeof(u64)); /* rest is cleared below */
+	memset(iv, 0, ctx->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)));
+	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 crypt_config *cc, u8 *iv,
-			     struct dm_crypt_request *dmreq)
+static int crypt_iv_null_gen(struct geniv_ctx *ctx,
+			     struct geniv_req_ctx *rctx,
+			     struct geniv_subreq *subreq)
 {
-	memset(iv, 0, cc->iv_size);
+	u8 *iv = rctx->iv;
 
+	memset(iv, 0, ctx->iv_size);
 	return 0;
 }
 
-static void crypt_iv_lmk_dtr(struct crypt_config *cc)
+static void crypt_iv_lmk_dtr(struct geniv_ctx *ctx)
 {
-	struct iv_lmk_private *lmk = &cc->iv_gen_private.lmk;
+	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);
@@ -483,49 +431,49 @@ static void crypt_iv_lmk_dtr(struct crypt_config *cc)
 	lmk->seed = NULL;
 }
 
-static int crypt_iv_lmk_ctr(struct crypt_config *cc, struct dm_target *ti,
-			    const char *opts)
+static int crypt_iv_lmk_ctr(struct geniv_ctx *ctx)
 {
-	struct iv_lmk_private *lmk = &cc->iv_gen_private.lmk;
+	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)) {
-		ti->error = "Error initializing LMK hash";
+		DMERR("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 (cc->key_parts == cc->tfms_count) {
+	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(cc);
-		ti->error = "Error kmallocing seed storage in LMK";
+		crypt_iv_lmk_dtr(ctx);
+		DMERR("Error kmallocing seed storage in LMK\n");
 		return -ENOMEM;
 	}
 
 	return 0;
 }
 
-static int crypt_iv_lmk_init(struct crypt_config *cc)
+static int crypt_iv_lmk_init(struct geniv_ctx *ctx)
 {
-	struct iv_lmk_private *lmk = &cc->iv_gen_private.lmk;
-	int subkey_size = cc->key_size / cc->key_parts;
+	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, cc->key + (cc->tfms_count * subkey_size),
+		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 crypt_config *cc)
+static int crypt_iv_lmk_wipe(struct geniv_ctx *ctx)
 {
-	struct iv_lmk_private *lmk = &cc->iv_gen_private.lmk;
+	struct geniv_lmk_private *lmk = &ctx->iv_gen_private.lmk;
 
 	if (lmk->seed)
 		memset(lmk->seed, 0, LMK_SEED_SIZE);
@@ -533,15 +481,14 @@ static int crypt_iv_lmk_wipe(struct crypt_config *cc)
 	return 0;
 }
 
-static int crypt_iv_lmk_one(struct crypt_config *cc, u8 *iv,
-			    struct dm_crypt_request *dmreq,
-			    u8 *data)
+static int crypt_iv_lmk_one(struct geniv_ctx *ctx, u8 *iv,
+			    struct geniv_req_ctx *rctx, u8 *data)
 {
-	struct iv_lmk_private *lmk = &cc->iv_gen_private.lmk;
-	SHASH_DESC_ON_STACK(desc, lmk->hash_tfm);
+	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;
@@ -562,8 +509,9 @@ static int crypt_iv_lmk_one(struct crypt_config *cc, u8 *iv,
 		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[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));
@@ -577,50 +525,54 @@ static int crypt_iv_lmk_one(struct crypt_config *cc, u8 *iv,
 
 	for (i = 0; i < MD5_HASH_WORDS; i++)
 		__cpu_to_le32s(&md5state.hash[i]);
-	memcpy(iv, &md5state.hash, cc->iv_size);
+	memcpy(iv, &md5state.hash, ctx->iv_size);
 
 	return 0;
 }
 
-static int crypt_iv_lmk_gen(struct crypt_config *cc, u8 *iv,
-			    struct dm_crypt_request *dmreq)
+static int crypt_iv_lmk_gen(struct geniv_ctx *ctx,
+			    struct geniv_req_ctx *rctx,
+			    struct geniv_subreq *subreq)
 {
 	u8 *src;
+	u8 *iv = rctx->iv;
 	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);
+	if (rctx->is_write) {
+		src = kmap_atomic(sg_page(&subreq->src));
+		r = crypt_iv_lmk_one(ctx, iv, rctx, src + subreq->src.offset);
 		kunmap_atomic(src);
 	} else
-		memset(iv, 0, cc->iv_size);
+		memset(iv, 0, ctx->iv_size);
 
 	return r;
 }
 
-static int crypt_iv_lmk_post(struct crypt_config *cc, u8 *iv,
-			     struct dm_crypt_request *dmreq)
+static int crypt_iv_lmk_post(struct geniv_ctx *ctx,
+			     struct geniv_req_ctx *rctx,
+			     struct geniv_subreq *subreq)
 {
 	u8 *dst;
+	u8 *iv = rctx->iv;
 	int r;
 
-	if (bio_data_dir(dmreq->ctx->bio_in) == WRITE)
+	if (rctx->is_write)
 		return 0;
 
-	dst = kmap_atomic(sg_page(&dmreq->sg_out));
-	r = crypt_iv_lmk_one(cc, iv, dmreq, dst + dmreq->sg_out.offset);
+	dst = kmap_atomic(sg_page(&subreq->dst));
+	r = crypt_iv_lmk_one(ctx, iv, rctx, dst + subreq->dst.offset);
 
 	/* Tweak the first block of plaintext sector */
 	if (!r)
-		crypto_xor(dst + dmreq->sg_out.offset, iv, cc->iv_size);
+		crypto_xor(dst + subreq->dst.offset, iv, ctx->iv_size);
 
 	kunmap_atomic(dst);
 	return r;
 }
 
-static void crypt_iv_tcw_dtr(struct crypt_config *cc)
+static void crypt_iv_tcw_dtr(struct geniv_ctx *ctx)
 {
-	struct iv_tcw_private *tcw = &cc->iv_gen_private.tcw;
+	struct geniv_tcw_private *tcw = &ctx->iv_gen_private.tcw;
 
 	kzfree(tcw->iv_seed);
 	tcw->iv_seed = NULL;
@@ -632,64 +584,65 @@ static void crypt_iv_tcw_dtr(struct crypt_config *cc)
 	tcw->crc32_tfm = NULL;
 }
 
-static int crypt_iv_tcw_ctr(struct crypt_config *cc, struct dm_target *ti,
-			    const char *opts)
+static int crypt_iv_tcw_ctr(struct geniv_ctx *ctx)
 {
-	struct iv_tcw_private *tcw = &cc->iv_gen_private.tcw;
+	struct geniv_tcw_private *tcw = &ctx->iv_gen_private.tcw;
 
-	if (cc->key_size <= (cc->iv_size + TCW_WHITENING_SIZE)) {
-		ti->error = "Wrong key size for TCW";
+	if (ctx->key_size <= (ctx->iv_size + TCW_WHITENING_SIZE)) {
+		DMERR("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)) {
-		ti->error = "Error initializing CRC32 in TCW";
+		DMERR("Error initializing CRC32 in TCW; err=%ld\n",
+			PTR_ERR(tcw->crc32_tfm));
 		return PTR_ERR(tcw->crc32_tfm);
 	}
 
-	tcw->iv_seed = kzalloc(cc->iv_size, GFP_KERNEL);
+	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(cc);
-		ti->error = "Error allocating seed storage in TCW";
+		crypt_iv_tcw_dtr(ctx);
+		DMERR("Error allocating seed storage in TCW\n");
 		return -ENOMEM;
 	}
 
 	return 0;
 }
 
-static int crypt_iv_tcw_init(struct crypt_config *cc)
+static int crypt_iv_tcw_init(struct geniv_ctx *ctx)
 {
-	struct iv_tcw_private *tcw = &cc->iv_gen_private.tcw;
-	int key_offset = cc->key_size - cc->iv_size - TCW_WHITENING_SIZE;
+	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, &cc->key[key_offset], cc->iv_size);
-	memcpy(tcw->whitening, &cc->key[key_offset + cc->iv_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 crypt_config *cc)
+static int crypt_iv_tcw_wipe(struct geniv_ctx *ctx)
 {
-	struct iv_tcw_private *tcw = &cc->iv_gen_private.tcw;
+	struct geniv_tcw_private *tcw = &ctx->iv_gen_private.tcw;
 
-	memset(tcw->iv_seed, 0, cc->iv_size);
+	memset(tcw->iv_seed, 0, ctx->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)
+static int crypt_iv_tcw_whitening(struct geniv_ctx *ctx,
+				  struct geniv_req_ctx *rctx, u8 *data)
 {
-	struct iv_tcw_private *tcw = &cc->iv_gen_private.tcw;
-	__le64 sector = cpu_to_le64(dmreq->iv_sector);
+	struct geniv_tcw_private *tcw = &ctx->iv_gen_private.tcw;
+	__le64 sector = cpu_to_le64(rctx->iv_sector);
 	u8 buf[TCW_WHITENING_SIZE];
-	SHASH_DESC_ON_STACK(desc, tcw->crc32_tfm);
 	int i, r;
+	SHASH_DESC_ON_STACK(desc, tcw->crc32_tfm);
 
 	/* xor whitening with sector number */
 	memcpy(buf, tcw->whitening, TCW_WHITENING_SIZE);
@@ -713,99 +666,1006 @@ static int crypt_iv_tcw_whitening(struct crypt_config *cc,
 	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;
-}
+	/* 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 geniv_req_ctx *rctx,
+			    struct geniv_subreq *subreq)
+{
+	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(&subreq->src));
+		r = crypt_iv_tcw_whitening(ctx, rctx,
+					   src + subreq->src.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 geniv_req_ctx *rctx,
+			     struct geniv_subreq *subreq)
+{
+	u8 *dst;
+	int r;
+
+	if (!rctx->is_write)
+		return 0;
+
+	/* Apply whitening on ciphertext */
+	dst = kmap_atomic(sg_page(&subreq->dst));
+	r = crypt_iv_tcw_whitening(ctx, rctx, dst + subreq->dst.offset);
+	kunmap_atomic(dst);
+
+	return r;
+}
+
+static const struct crypt_iv_operations crypt_iv_plain_ops = {
+	.generator = crypt_iv_plain_gen
+};
+
+static const struct crypt_iv_operations crypt_iv_plain64_ops = {
+	.generator = crypt_iv_plain64_gen
+};
+
+static const 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 const struct crypt_iv_operations crypt_iv_benbi_ops = {
+	.ctr	   = crypt_iv_benbi_ctr,
+	.generator = crypt_iv_benbi_gen
+};
+
+static const struct crypt_iv_operations crypt_iv_null_ops = {
+	.generator = crypt_iv_null_gen
+};
+
+static const 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 const 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 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_init_iv(struct geniv_ctx *ctx)
+{
+	int ret = -EINVAL;
+
+	DMDEBUG("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;
+		DMERR("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) {
+			DMERR("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)
+			DMERR("Error creating IV for %s\n", ctx->ivmode);
+	}
+	ret = 0;
+end:
+	return ret;
+}
+
+static void geniv_free_tfms(struct geniv_ctx *ctx)
+{
+	unsigned int i;
+
+	if (!ctx->tfms)
+		return;
+
+	for (i = 0; i < ctx->tfms_count; i++)
+		if (ctx->tfms[i] && !IS_ERR(ctx->tfms[i])) {
+			crypto_free_skcipher(ctx->tfms[i]);
+			ctx->tfms[i] = NULL;
+		}
+
+	kfree(ctx->tfms);
+	ctx->tfms = NULL;
+}
+
+/* Allocate memory for the underlying cipher algorithm. Ex: cbc(aes)
+ */
+
+static int geniv_alloc_tfms(struct crypto_skcipher *parent,
+			    struct geniv_ctx *ctx)
+{
+	unsigned int i, reqsize, align;
+	int err = 0;
+
+	ctx->tfms = kcalloc(ctx->tfms_count, sizeof(struct crypto_skcipher *),
+			   GFP_KERNEL);
+	if (!ctx->tfms) {
+		err = -ENOMEM;
+		goto end;
+	}
+
+	/* First instance is already allocated in geniv_init_tfm */
+	ctx->tfms[0] = ctx->child;
+	for (i = 1; i < ctx->tfms_count; i++) {
+		ctx->tfms[i] = crypto_alloc_skcipher(ctx->ciphermode, 0, 0);
+		if (IS_ERR(ctx->tfms[i])) {
+			err = PTR_ERR(ctx->tfms[i]);
+			geniv_free_tfms(ctx);
+			goto end;
+		}
+
+		/* Setup the current cipher's request structure */
+		align = crypto_skcipher_alignmask(parent);
+		align &= ~(crypto_tfm_ctx_alignment() - 1);
+		reqsize = align + sizeof(struct geniv_req_ctx) +
+			  crypto_skcipher_reqsize(ctx->tfms[i]);
+		crypto_skcipher_set_reqsize(parent, reqsize);
+	}
+
+end:
+	return err;
+}
+
+/* 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);
+	int ret = -ENOMEM;
+
+	ctx->iv_size = crypto_skcipher_ivsize(parent);
+	ctx->tfms_count = info->tfms_count;
+	ctx->key = info->key;
+	ctx->key_size = info->key_size;
+	ctx->key_parts = info->key_parts;
+	ctx->ivopts = info->ivopts;
+
+	ret = geniv_alloc_tfms(parent, ctx);
+	if (ret)
+		goto end;
+
+	ret = geniv_init_iv(ctx);
+
+end:
+	return ret;
+}
+
+static int geniv_setkey_tfms(struct crypto_skcipher *parent,
+			     struct geniv_ctx *ctx,
+			     struct geniv_key_info *info)
+{
+	unsigned int subkey_size;
+	int ret = 0, i;
+
+	/* Ignore extra keys (which are used for IV etc) */
+	subkey_size = (ctx->key_size - ctx->key_extra_size)
+		      >> ilog2(ctx->tfms_count);
+
+	for (i = 0; i < ctx->tfms_count; i++) {
+		struct crypto_skcipher *child = ctx->tfms[i];
+		char *subkey = ctx->key + (subkey_size) * i;
+
+		crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
+		crypto_skcipher_set_flags(child,
+					  crypto_skcipher_get_flags(parent) &
+					  CRYPTO_TFM_REQ_MASK);
+		ret = crypto_skcipher_setkey(child, subkey, subkey_size);
+		if (ret) {
+			DMERR("Error setting key for tfms[%d]\n", i);
+			break;
+		}
+		crypto_skcipher_set_flags(parent,
+					  crypto_skcipher_get_flags(child) &
+					  CRYPTO_TFM_RES_MASK);
+	}
+
+	return ret;
+}
+
+static int geniv_setkey(struct crypto_skcipher *parent,
+			const u8 *key, unsigned int keylen)
+{
+	int err = 0;
+	struct geniv_ctx *ctx = crypto_skcipher_ctx(parent);
+	struct geniv_key_info *info = (struct geniv_key_info *) key;
+
+	DMDEBUG("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;
+	}
+
+	if (err)
+		goto end;
+
+	err = geniv_setkey_tfms(parent, ctx, info);
+
+end:
+	return err;
+}
+
+static void geniv_async_done(struct crypto_async_request *async_req, int error);
+
+static int geniv_alloc_subreq(struct skcipher_request *req,
+			      struct geniv_ctx *ctx,
+			      struct geniv_req_ctx *rctx)
+{
+	int key_index, r = 0;
+	struct skcipher_request *sreq;
+
+	if (!rctx->subreq) {
+		rctx->subreq = mempool_alloc(ctx->subreq_pool, GFP_NOIO);
+		if (!rctx->subreq)
+			r = -ENOMEM;
+	}
+
+	sreq = &rctx->subreq->req;
+	rctx->subreq->rctx = rctx;
+
+	key_index = rctx->iv_sector & (ctx->tfms_count - 1);
+
+	skcipher_request_set_tfm(sreq, ctx->tfms[key_index]);
+	skcipher_request_set_callback(sreq, req->base.flags,
+				      geniv_async_done, rctx->subreq);
+	return r;
+}
+
+/* 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 geniv_subreq *subreq =
+		(struct geniv_subreq *) async_req->data;
+	struct 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);
+
+	/*
+	 * 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, subreq);
+
+	mempool_free(subreq, ctx->subreq_pool);
+
+	/* 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.
+	 */
+	if (!atomic_dec_and_test(&rctx->req_pending)) {
+		/* Call the parent cipher's completion function */
+		skcipher_request_complete(req, error);
+	}
+}
+
+static unsigned int geniv_get_sectors(struct scatterlist *sg1,
+				      struct scatterlist *sg2,
+				      unsigned int segments)
+{
+	unsigned int i, n1, n2, nents;
+
+	n1 = n2 = 0;
+	for (i = 0; i < segments ; i++)
+		n1 += sg1[i].length / SECTOR_SIZE;
+
+	for (i = 0; i < segments ; i++)
+		n2 += sg2[i].length / SECTOR_SIZE;
+
+	nents = n1 > n2 ? n1 : n2;
+	return nents;
+}
+
+/* Iterate scatterlist of segments to retrieve the 512-byte sectors so that
+ * unique IVs could be generated for each 512-byte sector. This split may not
+ * be necessary e.g. when these ciphers are modelled in hardware, where it can
+ * make use of the hardware's IV generation capabilities.
+ */
+
+static int geniv_iter_block(struct skcipher_request *req,
+			    struct geniv_subreq *subreq,
+			    struct geniv_req_ctx *rctx,
+			    unsigned int *seg_no,
+			    unsigned int *done)
+
+{
+	unsigned int srcoff, dstoff, len, rem;
+	struct scatterlist *src1, *dst1, *src2, *dst2;
+
+	if (unlikely(*seg_no >= rctx->nents))
+		return 0; /* done */
+
+	src1 = &req->src[*seg_no];
+	dst1 = &req->dst[*seg_no];
+	src2 = &subreq->src;
+	dst2 = &subreq->dst;
+
+	if (*done >= src1->length) {
+		(*seg_no)++;
+
+		if (*seg_no >= rctx->nents)
+			return 0; /* done */
+
+		src1 = &req->src[*seg_no];
+		dst1 = &req->dst[*seg_no];
+		*done = 0;
+	}
+
+	srcoff = src1->offset + *done;
+	dstoff = dst1->offset + *done;
+	rem = src1->length - *done;
+
+	len = rem > SECTOR_SIZE ? SECTOR_SIZE : rem;
+
+	DMDEBUG("segment:(%d/%u), srcoff:%d, dstoff:%d, done:%d, rem:%d\n",
+		*seg_no + 1, rctx->nents, srcoff, dstoff, *done, rem);
+
+	sg_set_page(src2, sg_page(src1), len, srcoff);
+	sg_set_page(dst2, sg_page(dst1), len, dstoff);
+
+	*done += len;
+
+	return len; /* bytes returned */
+}
+
+/* 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 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 geniv_req_ctx *rctx = geniv_req_ctx(req);
+	struct geniv_req_info *rinfo = (struct geniv_req_info *) req->iv;
+	int i, bytes, cryptlen, ret = 0;
+	unsigned int sectors, segno = 0, done = 0;
+	char *str __maybe_unused = 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;
+	rctx->req = req;
+	rctx->subreq = NULL;
+	cryptlen = req->cryptlen;
+
+	DMDEBUG("geniv:%s: starting sector=%d, #segments=%u\n", str,
+		(unsigned int) rctx->iv_sector, rctx->nents);
+
+	sectors = geniv_get_sectors(req->src, req->dst, rctx->nents);
+
+	init_completion(&rctx->restart);
+	atomic_set(&rctx->req_pending, 1);
+
+	for (i = 0; i < sectors; i++) {
+		struct geniv_subreq *subreq;
+
+		ret = geniv_alloc_subreq(req, ctx, rctx);
+		if (ret)
+			goto end;
+
+		subreq = rctx->subreq;
+		subreq->rctx = rctx;
+
+		atomic_inc(&rctx->req_pending);
+		bytes = geniv_iter_block(req, subreq, rctx, &segno, &done);
+
+		if (bytes == 0)
+			break;
+
+		cryptlen -= bytes;
+
+		if (ctx->iv_gen_ops)
+			ret = ctx->iv_gen_ops->generator(ctx, rctx, subreq);
+
+		if (ret < 0) {
+			DMERR("Error in generating IV ret: %d\n", ret);
+			goto end;
+		}
+
+		skcipher_request_set_crypt(&subreq->req, &subreq->src,
+					   &subreq->dst, bytes, rctx->iv);
+
+		if (encrypt)
+			ret = crypto_skcipher_encrypt(&subreq->req);
+
+		else
+			ret = crypto_skcipher_decrypt(&subreq->req);
+
+		if (!ret && ctx->iv_gen_ops && ctx->iv_gen_ops->post)
+			ret = ctx->iv_gen_ops->post(ctx, rctx, subreq);
+
+		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:
+			/* Marking this NULL lets the creation of a new sub-
+			 * request when 'geniv_alloc_subreq' is called.
+			 */
+			rctx->subreq = NULL;
+			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 (rctx->subreq && atomic_read(&rctx->req_pending) == 1) {
+		DMDEBUG("geniv:%s: Freeing sub request\n", str);
+		mempool_free(rctx->subreq, ctx->subreq_pool);
+	}
+
+end:
+	return ret;
+}
+
+static int geniv_encrypt(struct skcipher_request *req)
+{
+	return geniv_crypt(req, true);
+}
+
+static int geniv_decrypt(struct skcipher_request *req)
+{
+	return geniv_crypt(req, false);
+}
+
+static int geniv_init_tfm(struct crypto_skcipher *tfm)
+{
+	struct geniv_ctx *ctx = crypto_skcipher_ctx(tfm);
+	const int psize = sizeof(struct geniv_subreq);
+	unsigned int reqsize, align;
+	char *algname, *chainmode;
+	int ret = 0;
+
+	algname = (char *) crypto_tfm_alg_name(crypto_skcipher_tfm(tfm));
+	ctx->ciphermode = kmalloc(CRYPTO_MAX_ALG_NAME, GFP_KERNEL);
+	if (!ctx->ciphermode) {
+		ret = -ENOMEM;
+		goto end;
+	}
+
+	/* Parse algorithm name 'ivmode(chainmode(cipher))' */
+	ctx->ivmode	= strsep(&algname, "(");
+	chainmode	= strsep(&algname, "(");
+	ctx->cipher	= strsep(&algname, ")");
+
+	snprintf(ctx->ciphermode, CRYPTO_MAX_ALG_NAME, "%s(%s)",
+		 chainmode, ctx->cipher);
+
+	DMDEBUG("ciphermode=%s, ivmode=%s\n", ctx->ciphermode, ctx->ivmode);
+
+	/*
+	 * Usually the underlying cipher instances are spawned here, but since
+	 * the value of tfms_count (which is equal to the key_count) is not
+	 * known yet, create only one instance and delay the creation of the
+	 * rest of the instances of the underlying cipher 'cbc(aes)' until
+	 * the setkey operation is invoked.
+	 * The first instance created i.e. ctx->child will later be assigned as
+	 * the 1st element in the array ctx->tfms. Creation of atleast one
+	 * instance of the cipher is necessary to be created here to uncover
+	 * any errors earlier than during the setkey operation later where the
+	 * remaining instances are created.
+	 */
+	ctx->child = crypto_alloc_skcipher(ctx->ciphermode, 0, 0);
+	if (IS_ERR(ctx->child)) {
+		ret = PTR_ERR(ctx->child);
+		DMERR("Failed to create skcipher %s. err %d\n",
+		      ctx->ciphermode, ret);
+		goto end;
+	}
+
+	/* Setup the current cipher's request structure */
+	align = crypto_skcipher_alignmask(tfm);
+	align &= ~(crypto_tfm_ctx_alignment() - 1);
+	reqsize = align + sizeof(struct geniv_req_ctx)
+			+ crypto_skcipher_reqsize(ctx->child);
+	crypto_skcipher_set_reqsize(tfm, reqsize);
+
+	/* create memory pool for sub-request structure */
+	ctx->subreq_pool = mempool_create_kmalloc_pool(MIN_IOS, psize);
+	if (!ctx->subreq_pool) {
+		ret = -ENOMEM;
+		DMERR("Could not allocate crypt sub-request mempool\n");
+	}
+end:
+	return ret;
+}
+
+static void 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);
+
+	mempool_destroy(ctx->subreq_pool);
+	geniv_free_tfms(ctx);
+	kfree(ctx->ciphermode);
+}
+
+static void geniv_free(struct skcipher_instance *inst)
+{
+	struct crypto_skcipher_spawn *spawn = skcipher_instance_ctx(inst);
+
+	crypto_drop_skcipher(spawn);
+	kfree(inst);
+}
+
+static int 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_skcipher(spawn, cipher_name, 0,
+				    crypto_requires_sync(algt->type,
+							 algt->mask));
+
+	if (err)
+		goto err_free_inst;
+
+	alg = crypto_spawn_skcipher_alg(spawn);
+
+	err = -EINVAL;
+
+	/* Only support blocks of size which is of a power of 2 */
+	if (!is_power_of_2(alg->base.cra_blocksize))
+		goto err_drop_spawn;
+
+	/* algname: essiv, base.cra_name: cbc(aes) */
+	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 = geniv_setkey;
+	inst->alg.encrypt = geniv_encrypt;
+	inst->alg.decrypt = geniv_decrypt;
+
+	inst->alg.base.cra_ctxsize = sizeof(struct geniv_ctx);
+
+	inst->alg.init = geniv_init_tfm;
+	inst->alg.exit = geniv_exit_tfm;
+
+	inst->free = 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 geniv_create(tmpl, tb, "plain");
+}
+
+static int crypto_plain64_create(struct crypto_template *tmpl,
+				 struct rtattr **tb)
+{
+	return geniv_create(tmpl, tb, "plain64");
+}
+
+static int crypto_essiv_create(struct crypto_template *tmpl,
+			       struct rtattr **tb)
+{
+	return geniv_create(tmpl, tb, "essiv");
+}
+
+static int crypto_benbi_create(struct crypto_template *tmpl,
+			       struct rtattr **tb)
+{
+	return geniv_create(tmpl, tb, "benbi");
+}
+
+static int crypto_null_create(struct crypto_template *tmpl,
+			      struct rtattr **tb)
+{
+	return geniv_create(tmpl, tb, "null");
+}
+
+static int crypto_lmk_create(struct crypto_template *tmpl,
+			     struct rtattr **tb)
+{
+	return geniv_create(tmpl, tb, "lmk");
+}
+
+static int crypto_tcw_create(struct crypto_template *tmpl,
+			     struct rtattr **tb)
+{
+	return 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 geniv_register_algs(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 geniv_deregister_algs(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);
+}
+
+/* End of geniv template cipher algorithms */
+
+/*
+ * context holding the current state of a multi-part conversion
+ */
+struct convert_context {
+	struct completion restart;
+	struct bio *bio_in;
+	struct bio *bio_out;
+	struct bvec_iter iter_in;
+	struct bvec_iter iter_out;
+	sector_t cc_sector;
+	atomic_t cc_pending;
+	struct skcipher_request *req;
+};
+
+/*
+ * per bio private data
+ */
+struct dm_crypt_io {
+	struct crypt_config *cc;
+	struct bio *base_bio;
+	struct work_struct work;
+
+	struct convert_context ctx;
 
-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;
+	atomic_t io_pending;
+	int error;
+	sector_t sector;
 
-	/* 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);
-	}
+	struct rb_node rb_node;
+} CRYPTO_MINALIGN_ATTR;
 
-	/* 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);
+struct dm_crypt_request {
+	struct convert_context *ctx;
+	struct scatterlist *sg_in;
+	struct scatterlist *sg_out;
+	sector_t iv_sector;
+};
 
-	return r;
-}
+struct crypt_config;
 
-static int crypt_iv_tcw_post(struct crypt_config *cc, u8 *iv,
-			     struct dm_crypt_request *dmreq)
-{
-	u8 *dst;
-	int r;
+/*
+ * Crypt: maps a linear range of a block device
+ * and encrypts / decrypts at the same time.
+ */
+enum flags { DM_CRYPT_SUSPENDED, DM_CRYPT_KEY_VALID,
+	     DM_CRYPT_SAME_CPU, DM_CRYPT_NO_OFFLOAD };
 
-	if (bio_data_dir(dmreq->ctx->bio_in) != WRITE)
-		return 0;
+/*
+ * The fields in here must be read only after initialization.
+ */
+struct crypt_config {
+	struct dm_dev *dev;
+	sector_t start;
 
-	/* 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);
+	/*
+	 * pool for per bio private data, crypto requests and
+	 * encryption requeusts/buffer pages
+	 */
+	mempool_t *req_pool;
+	mempool_t *page_pool;
+	struct bio_set *bs;
+	struct mutex bio_alloc_lock;
 
-	return r;
-}
+	struct workqueue_struct *io_queue;
+	struct workqueue_struct *crypt_queue;
 
-static const struct crypt_iv_operations crypt_iv_plain_ops = {
-	.generator = crypt_iv_plain_gen
-};
+	struct task_struct *write_thread;
+	wait_queue_head_t write_thread_wait;
+	struct rb_root write_tree;
 
-static const struct crypt_iv_operations crypt_iv_plain64_ops = {
-	.generator = crypt_iv_plain64_gen
-};
+	char *cipher;
+	char *cipher_string;
+	char *key_string;
 
-static const 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
-};
+	sector_t iv_offset;
+	unsigned int iv_size;
 
-static const struct crypt_iv_operations crypt_iv_benbi_ops = {
-	.ctr	   = crypt_iv_benbi_ctr,
-	.dtr	   = crypt_iv_benbi_dtr,
-	.generator = crypt_iv_benbi_gen
-};
+	/* ESSIV: struct crypto_cipher *essiv_tfm */
+	void *iv_private;
+	struct crypto_skcipher *tfm;
+	unsigned int tfms_count;
 
-static const struct crypt_iv_operations crypt_iv_null_ops = {
-	.generator = crypt_iv_null_gen
-};
+	/*
+	 * Layout of each crypto request:
+	 *
+	 *   struct skcipher_request
+	 *      context
+	 *      padding
+	 *   struct dm_crypt_request
+	 *      padding
+	 *   IV
+	 *
+	 * The padding is added so that dm_crypt_request and the IV are
+	 * correctly aligned.
+	 */
+	unsigned int dmreq_start;
 
-static const 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
-};
+	unsigned int per_bio_data_size;
 
-static const 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
+	unsigned long flags;
+	unsigned int key_size;
+	unsigned int key_parts;      /* independent parts in key buffer */
+	unsigned int key_extra_size; /* additional keys length */
+	u8 key[0];
 };
 
+static void clone_init(struct dm_crypt_io *, struct bio *);
+static void kcryptd_queue_crypt(struct dm_crypt_io *io);
+static u8 *iv_of_dmreq(struct crypt_config *cc, struct dm_crypt_request *dmreq);
+
 static void crypt_convert_init(struct crypt_config *cc,
 			       struct convert_context *ctx,
 			       struct bio *bio_out, struct bio *bio_in,
@@ -837,53 +1697,7 @@ static u8 *iv_of_dmreq(struct crypt_config *cc,
 		       struct dm_crypt_request *dmreq)
 {
 	return (u8 *)ALIGN((unsigned long)(dmreq + 1),
-		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;
+		crypto_skcipher_alignmask(cc->tfm) + 1);
 }
 
 static void kcryptd_async_done(struct crypto_async_request *async_req,
@@ -892,12 +1706,10 @@ static void kcryptd_async_done(struct crypto_async_request *async_req,
 static void crypt_alloc_req(struct crypt_config *cc,
 			    struct convert_context *ctx)
 {
-	unsigned key_index = ctx->cc_sector & (cc->tfms_count - 1);
-
 	if (!ctx->req)
 		ctx->req = mempool_alloc(cc->req_pool, GFP_NOIO);
 
-	skcipher_request_set_tfm(ctx->req, cc->tfms[key_index]);
+	skcipher_request_set_tfm(ctx->req, cc->tfm);
 
 	/*
 	 * Use REQ_MAY_BACKLOG so a cipher driver internally backlogs
@@ -920,57 +1732,98 @@ 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);
+
+	req = ctx->req;
+	dmreq = dmreq_of_req(cc, req);
+	iv = iv_of_dmreq(cc, dmreq);
 
-	while (ctx->iter_in.bi_size && ctx->iter_out.bi_size) {
+	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;
 
-		crypt_alloc_req(cc, ctx);
+	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);
 
-		atomic_inc(&ctx->cc_pending);
+	dmreq->sg_in  = kcalloc(nents, sizeof(struct scatterlist), GFP_KERNEL);
+	dmreq->sg_out = kcalloc(nents, sizeof(struct scatterlist), GFP_KERNEL);
+	if (!dmreq->sg_in || !dmreq->sg_out) {
+		DMERR("dm-crypt: Failed to allocate scatterlist\n");
+		r = -ENOMEM;
+		goto end;
+	}
+	dmreq->ctx = ctx;
 
-		r = crypt_convert_block(cc, ctx, ctx->req);
+	sg_init_table(dmreq->sg_in, nents);
+	sg_init_table(dmreq->sg_out, nents);
 
-		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;
+	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);
 
-		/* There was an error while processing the request. */
-		default:
-			atomic_dec(&ctx->cc_pending);
-			return r;
-		}
+		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;
+	}
+end:
+	return r;
 }
 
+
 static void crypt_free_buffer_pages(struct crypt_config *cc, struct bio *clone);
 
 /*
@@ -1070,11 +1923,17 @@ 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);
 
@@ -1313,7 +2172,7 @@ 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);
@@ -1343,7 +2202,8 @@ 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;
 
@@ -1371,12 +2231,13 @@ 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))
@@ -1430,62 +2291,38 @@ static int crypt_decode_key(u8 *key, char *hex, unsigned int size)
 	return 0;
 }
 
-static void crypt_free_tfms(struct crypt_config *cc)
+static void crypt_free_tfm(struct crypt_config *cc)
 {
-	unsigned i;
-
-	if (!cc->tfms)
+	if (!cc->tfm)
 		return;
 
-	for (i = 0; i < cc->tfms_count; i++)
-		if (cc->tfms[i] && !IS_ERR(cc->tfms[i])) {
-			crypto_free_skcipher(cc->tfms[i]);
-			cc->tfms[i] = NULL;
-		}
+	if (cc->tfm && !IS_ERR(cc->tfm))
+		crypto_free_skcipher(cc->tfm);
 
-	kfree(cc->tfms);
-	cc->tfms = NULL;
+	cc->tfm = NULL;
 }
 
-static int crypt_alloc_tfms(struct crypt_config *cc, char *ciphermode)
+static int crypt_alloc_tfm(struct crypt_config *cc, char *ciphermode)
 {
-	unsigned i;
 	int err;
 
-	cc->tfms = kzalloc(cc->tfms_count * sizeof(struct crypto_skcipher *),
-			   GFP_KERNEL);
-	if (!cc->tfms)
-		return -ENOMEM;
-
-	for (i = 0; i < cc->tfms_count; i++) {
-		cc->tfms[i] = crypto_alloc_skcipher(ciphermode, 0, 0);
-		if (IS_ERR(cc->tfms[i])) {
-			err = PTR_ERR(cc->tfms[i]);
-			crypt_free_tfms(cc);
-			return err;
-		}
+	cc->tfm = crypto_alloc_skcipher(ciphermode, 0, 0);
+	if (IS_ERR(cc->tfm)) {
+		err = PTR_ERR(cc->tfm);
+		crypt_free_tfm(cc);
+		return err;
 	}
 
 	return 0;
 }
 
-static int crypt_setkey(struct crypt_config *cc)
+static inline int crypt_setkey(struct crypt_config *cc, enum setkey_op keyop,
+			       char *ivopts)
 {
-	unsigned subkey_size;
-	int err = 0, i, r;
-
-	/* Ignore extra keys (which are used for IV etc) */
-	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);
-		if (r)
-			err = r;
-	}
+	DECLARE_GENIV_KEY(kinfo, keyop, cc->tfms_count, cc->key, cc->key_size,
+			  cc->key_parts, ivopts);
 
-	return err;
+	return crypto_skcipher_setkey(cc->tfm, (u8 *) &kinfo, sizeof(kinfo));
 }
 
 #ifdef CONFIG_KEYS
@@ -1498,7 +2335,9 @@ static bool contains_whitespace(const char *str)
 	return false;
 }
 
-static int crypt_set_keyring_key(struct crypt_config *cc, const char *key_string)
+static int crypt_set_keyring_key(struct crypt_config *cc,
+				 const char *key_string,
+				 enum setkey_op keyop, char *ivopts)
 {
 	char *new_key_string, *key_desc;
 	int ret;
@@ -1559,7 +2398,7 @@ static int crypt_set_keyring_key(struct crypt_config *cc, const char *key_string
 	/* clear the flag since following operations may invalidate previously valid key */
 	clear_bit(DM_CRYPT_KEY_VALID, &cc->flags);
 
-	ret = crypt_setkey(cc);
+	ret = crypt_setkey(cc, keyop, ivopts);
 
 	/* wipe the kernel key payload copy in each case */
 	memset(cc->key, 0, cc->key_size * sizeof(u8));
@@ -1599,7 +2438,9 @@ static int get_key_size(char **key_string)
 
 #else
 
-static int crypt_set_keyring_key(struct crypt_config *cc, const char *key_string)
+static int crypt_set_keyring_key(struct crypt_config *cc,
+				 const char *key_string,
+				 enum setkey_op keyop, char *ivopts)
 {
 	return -EINVAL;
 }
@@ -1611,7 +2452,8 @@ static int get_key_size(char **key_string)
 
 #endif
 
-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 *ivopts)
 {
 	int r = -EINVAL;
 	int key_string_len = strlen(key);
@@ -1622,7 +2464,7 @@ static int crypt_set_key(struct crypt_config *cc, char *key)
 
 	/* ':' means the key is in kernel keyring, short-circuit normal key processing */
 	if (key[0] == ':') {
-		r = crypt_set_keyring_key(cc, key + 1);
+		r = crypt_set_keyring_key(cc, key + 1, keyop, ivopts);
 		goto out;
 	}
 
@@ -1636,7 +2478,7 @@ static int crypt_set_key(struct crypt_config *cc, char *key)
 	if (cc->key_size && crypt_decode_key(cc->key, key, cc->key_size) < 0)
 		goto out;
 
-	r = crypt_setkey(cc);
+	r = crypt_setkey(cc, keyop, ivopts);
 	if (!r)
 		set_bit(DM_CRYPT_KEY_VALID, &cc->flags);
 
@@ -1647,6 +2489,17 @@ static int crypt_set_key(struct crypt_config *cc, char *key)
 	return r;
 }
 
+static int crypt_init_key(struct dm_target *ti, char *key, char *ivopts)
+{
+	struct crypt_config *cc = ti->private;
+	int ret;
+
+	ret = crypt_set_key(cc, SETKEY_OP_INIT, key, 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);
@@ -1654,7 +2507,7 @@ static int crypt_wipe_key(struct crypt_config *cc)
 	kzfree(cc->key_string);
 	cc->key_string = NULL;
 
-	return crypt_setkey(cc);
+	return crypt_setkey(cc, SETKEY_OP_WIPE, NULL);
 }
 
 static void crypt_dtr(struct dm_target *ti)
@@ -1674,7 +2527,7 @@ static void crypt_dtr(struct dm_target *ti)
 	if (cc->crypt_queue)
 		destroy_workqueue(cc->crypt_queue);
 
-	crypt_free_tfms(cc);
+	crypt_free_tfm(cc);
 
 	if (cc->bs)
 		bioset_free(cc->bs);
@@ -1682,9 +2535,6 @@ 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);
 
@@ -1762,22 +2612,30 @@ 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;
 	}
 
 	/* Allocate cipher */
-	ret = crypt_alloc_tfms(cc, cipher_api);
+	ret = crypt_alloc_tfm(cc, cipher_api);
 	if (ret < 0) {
 		ti->error = "Error allocating crypto tfm";
 		goto bad;
 	}
 
 	/* Initialize IV */
-	cc->iv_size = crypto_skcipher_ivsize(any_tfm(cc));
+	cc->iv_size = crypto_skcipher_ivsize(cc->tfm);
 	if (cc->iv_size)
 		/* at least a 64 bit sector number should fit in our buffer */
 		cc->iv_size = max(cc->iv_size,
@@ -1785,23 +2643,10 @@ 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.
@@ -1813,39 +2658,14 @@ 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_key(ti, key, 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:
@@ -1901,20 +2721,20 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 		goto bad;
 
 	cc->dmreq_start = sizeof(struct skcipher_request);
-	cc->dmreq_start += crypto_skcipher_reqsize(any_tfm(cc));
+	cc->dmreq_start += crypto_skcipher_reqsize(cc->tfm);
 	cc->dmreq_start = ALIGN(cc->dmreq_start, __alignof__(struct dm_crypt_request));
 
-	if (crypto_skcipher_alignmask(any_tfm(cc)) < CRYPTO_MINALIGN) {
+	if (crypto_skcipher_alignmask(cc->tfm) < CRYPTO_MINALIGN) {
 		/* Allocate the padding exactly */
 		iv_size_padding = -(cc->dmreq_start + sizeof(struct dm_crypt_request))
-				& crypto_skcipher_alignmask(any_tfm(cc));
+				& crypto_skcipher_alignmask(cc->tfm);
 	} else {
 		/*
 		 * If the cipher requires greater alignment than kmalloc
 		 * alignment, we don't know the exact position of the
 		 * initialization vector. We must assume worst case.
 		 */
-		iv_size_padding = crypto_skcipher_alignmask(any_tfm(cc));
+		iv_size_padding = crypto_skcipher_alignmask(cc->tfm);
 	}
 
 	ret = -ENOMEM;
@@ -2072,8 +2892,9 @@ 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;
 }
@@ -2155,7 +2976,7 @@ 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 key_size, ret = -EINVAL;
+	int key_size;
 
 	if (argc < 2)
 		goto error;
@@ -2173,19 +2994,9 @@ static int crypt_message(struct dm_target *ti, unsigned argc, char **argv)
 				return -EINVAL;
 			}
 
-			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], NULL);
 		}
 		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);
 		}
 	}
@@ -2216,7 +3027,7 @@ static void crypt_io_hints(struct dm_target *ti, struct queue_limits *limits)
 
 static struct target_type crypt_target = {
 	.name   = "crypt",
-	.version = {1, 15, 0},
+	.version = {1, 16, 0},
 	.module = THIS_MODULE,
 	.ctr    = crypt_ctr,
 	.dtr    = crypt_dtr,
@@ -2234,6 +3045,7 @@ static int __init dm_crypt_init(void)
 {
 	int r;
 
+	geniv_register_algs();
 	r = dm_register_target(&crypt_target);
 	if (r < 0)
 		DMERR("register failed %d", r);
@@ -2244,6 +3056,7 @@ static int __init dm_crypt_init(void)
 static void __exit dm_crypt_exit(void)
 {
 	dm_unregister_target(&crypt_target);
+	geniv_deregister_algs();
 }
 
 module_init(dm_crypt_init);
diff --git a/include/crypto/geniv.h b/include/crypto/geniv.h
new file mode 100644
index 0000000..b472507
--- /dev/null
+++ b/include/crypto/geniv.h
@@ -0,0 +1,47 @@
+/*
+ * geniv: common interface 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_SIZE		(1 << SECTOR_SHIFT)
+
+enum setkey_op {
+	SETKEY_OP_INIT,
+	SETKEY_OP_SET,
+	SETKEY_OP_WIPE,
+};
+
+struct geniv_key_info {
+	enum setkey_op keyop;
+	unsigned int tfms_count;
+	u8 *key;
+	unsigned int key_size;
+	unsigned int key_parts;
+	char *ivopts;
+};
+
+#define DECLARE_GENIV_KEY(c, op, n, k, sz, kp, opts)	\
+	struct geniv_key_info c = {			\
+		.keyop = op,				\
+		.tfms_count = n,			\
+		.key = k,				\
+		.key_size = sz,				\
+		.key_parts = kp,			\
+		.ivopts = opts,				\
+	}
+
+struct geniv_req_info {
+	bool is_write;
+	sector_t iv_sector;
+	unsigned int nents;
+	u8 *iv;
+};
+
+#endif
