#ifndef _CRYPTO_LRW_H#define _CRYPTO_LRW_H #include <crypto/b128ops.h> struct scatterlist;struct gf128mul_64k;struct blkcipher_desc; #define LRW_BLOCK_SIZE 16 struct lrw_table_ctx {	/* optimizes multiplying a random (non incrementing, as at the	 * start of a new sector) value with key2, we could also have	 * used 4k optimization tables or no optimization at all. In the	 * latter case we would have to store key2 here */	struct gf128mul_64k *table;	/* stores:	 *  key2*{ 0,0,...0,0,0,0,1 }, key2*{ 0,0,...0,0,0,1,1 },	 *  key2*{ 0,0,...0,0,1,1,1 }, key2*{ 0,0,...0,1,1,1,1 }	 *  key2*{ 0,0,...1,1,1,1,1 }, etc	 * needed for optimized multiplication of incrementing values	 * with key2 */	be128 mulinc[128];}; int lrw_init_table(struct lrw_table_ctx *ctx, const u8 *tweak);void lrw_free_table(struct lrw_table_ctx *ctx); struct lrw_crypt_req {	be128 *tbuf;	unsigned int tbuflen; 	struct lrw_table_ctx *table_ctx;	void *crypt_ctx;	void (*crypt_fn)(void *ctx, u8 *blks, unsigned int nbytes);}; int lrw_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,	      struct scatterlist *src, unsigned int nbytes,	      struct lrw_crypt_req *req); #endif  /* _CRYPTO_LRW_H */