107 	int bsize = crypto_skcipher_blocksize(tfm);  in cts_cbc_encrypt()  local
116 	sg = scatterwalk_ffwd(rctx->sg, req->dst, offset - bsize);  in cts_cbc_encrypt()
117 	scatterwalk_map_and_copy(d + bsize, sg, 0, bsize, 0);  in cts_cbc_encrypt()
119 	memset(d, 0, bsize);  in cts_cbc_encrypt()
122 	scatterwalk_map_and_copy(d, sg, 0, bsize + lastn, 1);  in cts_cbc_encrypt()
128 	skcipher_request_set_crypt(subreq, sg, sg, bsize, req->iv);  in cts_cbc_encrypt()
153 	int bsize = crypto_skcipher_blocksize(tfm);  in crypto_cts_encrypt()  local
159 	if (nbytes < bsize)  in crypto_cts_encrypt()
162 	if (nbytes == bsize) {  in crypto_cts_encrypt()
171 	offset = rounddown(nbytes - 1, bsize);  in crypto_cts_encrypt()
188 	int bsize = crypto_skcipher_blocksize(tfm);  in cts_cbc_decrypt()  local
198 	sg = scatterwalk_ffwd(rctx->sg, req->dst, offset - bsize);  in cts_cbc_decrypt()
201 	scatterwalk_map_and_copy(d + bsize, sg, 0, bsize, 0);  in cts_cbc_decrypt()
203 	crypto_xor(d + bsize, space, bsize);  in cts_cbc_decrypt()
205 	memset(d, 0, bsize);  in cts_cbc_decrypt()
209 	crypto_xor(d + bsize, d, lastn);  in cts_cbc_decrypt()
212 	memcpy(d + lastn, d + bsize + lastn, bsize - lastn);  in cts_cbc_decrypt()
215 	scatterwalk_map_and_copy(d, sg, 0, bsize + lastn, 1);  in cts_cbc_decrypt()
222 	skcipher_request_set_crypt(subreq, sg, sg, bsize, space);  in cts_cbc_decrypt()
247 	int bsize = crypto_skcipher_blocksize(tfm);  in crypto_cts_decrypt()  local
254 	if (nbytes < bsize)  in crypto_cts_decrypt()
257 	if (nbytes == bsize) {  in crypto_cts_decrypt()
271 	offset = rounddown(nbytes - 1, bsize);  in crypto_cts_decrypt()
274 	if (offset <= bsize)  in crypto_cts_decrypt()
275 		memcpy(space, req->iv, bsize);  in crypto_cts_decrypt()
277 		scatterwalk_map_and_copy(space, req->src, offset - 2 * bsize,  in crypto_cts_decrypt()
278 					 bsize, 0);  in crypto_cts_decrypt()
294 	unsigned bsize;  in crypto_cts_init_tfm()  local
304 	bsize = crypto_skcipher_blocksize(cipher);  in crypto_cts_init_tfm()
308 		  (align & ~(crypto_tfm_ctx_alignment() - 1)) + bsize;  in crypto_cts_init_tfm()