53 static void crypto_cfb_final(struct skcipher_walk *walk,  in crypto_cfb_final()  argument
59 	u8 *src = walk->src.virt.addr;  in crypto_cfb_final()
60 	u8 *dst = walk->dst.virt.addr;  in crypto_cfb_final()
61 	u8 *iv = walk->iv;  in crypto_cfb_final()
62 	unsigned int nbytes = walk->nbytes;  in crypto_cfb_final()
68 static int crypto_cfb_encrypt_segment(struct skcipher_walk *walk,  in crypto_cfb_encrypt_segment()  argument
72 	unsigned int nbytes = walk->nbytes;  in crypto_cfb_encrypt_segment()
73 	u8 *src = walk->src.virt.addr;  in crypto_cfb_encrypt_segment()
74 	u8 *dst = walk->dst.virt.addr;  in crypto_cfb_encrypt_segment()
75 	u8 *iv = walk->iv;  in crypto_cfb_encrypt_segment()
89 static int crypto_cfb_encrypt_inplace(struct skcipher_walk *walk,  in crypto_cfb_encrypt_inplace()  argument
93 	unsigned int nbytes = walk->nbytes;  in crypto_cfb_encrypt_inplace()
94 	u8 *src = walk->src.virt.addr;  in crypto_cfb_encrypt_inplace()
95 	u8 *iv = walk->iv;  in crypto_cfb_encrypt_inplace()
106 	memcpy(walk->iv, iv, bsize);  in crypto_cfb_encrypt_inplace()
114 	struct skcipher_walk walk;  in crypto_cfb_encrypt()  local
118 	err = skcipher_walk_virt(&walk, req, false);  in crypto_cfb_encrypt()
120 	while (walk.nbytes >= bsize) {  in crypto_cfb_encrypt()
121 		if (walk.src.virt.addr == walk.dst.virt.addr)  in crypto_cfb_encrypt()
122 			err = crypto_cfb_encrypt_inplace(&walk, tfm);  in crypto_cfb_encrypt()
124 			err = crypto_cfb_encrypt_segment(&walk, tfm);  in crypto_cfb_encrypt()
125 		err = skcipher_walk_done(&walk, err);  in crypto_cfb_encrypt()
128 	if (walk.nbytes) {  in crypto_cfb_encrypt()
129 		crypto_cfb_final(&walk, tfm);  in crypto_cfb_encrypt()
130 		err = skcipher_walk_done(&walk, 0);  in crypto_cfb_encrypt()
136 static int crypto_cfb_decrypt_segment(struct skcipher_walk *walk,  in crypto_cfb_decrypt_segment()  argument
140 	unsigned int nbytes = walk->nbytes;  in crypto_cfb_decrypt_segment()
141 	u8 *src = walk->src.virt.addr;  in crypto_cfb_decrypt_segment()
142 	u8 *dst = walk->dst.virt.addr;  in crypto_cfb_decrypt_segment()
143 	u8 *iv = walk->iv;  in crypto_cfb_decrypt_segment()
154 	memcpy(walk->iv, iv, bsize);  in crypto_cfb_decrypt_segment()
159 static int crypto_cfb_decrypt_inplace(struct skcipher_walk *walk,  in crypto_cfb_decrypt_inplace()  argument
163 	unsigned int nbytes = walk->nbytes;  in crypto_cfb_decrypt_inplace()
164 	u8 *src = walk->src.virt.addr;  in crypto_cfb_decrypt_inplace()
165 	u8 *iv = walk->iv;  in crypto_cfb_decrypt_inplace()
175 	memcpy(walk->iv, iv, bsize);  in crypto_cfb_decrypt_inplace()
180 static int crypto_cfb_decrypt_blocks(struct skcipher_walk *walk,  in crypto_cfb_decrypt_blocks()  argument
183 	if (walk->src.virt.addr == walk->dst.virt.addr)  in crypto_cfb_decrypt_blocks()
184 		return crypto_cfb_decrypt_inplace(walk, tfm);  in crypto_cfb_decrypt_blocks()
186 		return crypto_cfb_decrypt_segment(walk, tfm);  in crypto_cfb_decrypt_blocks()
208 	struct skcipher_walk walk;  in crypto_cfb_decrypt()  local
212 	err = skcipher_walk_virt(&walk, req, false);  in crypto_cfb_decrypt()
214 	while (walk.nbytes >= bsize) {  in crypto_cfb_decrypt()
215 		err = crypto_cfb_decrypt_blocks(&walk, tfm);  in crypto_cfb_decrypt()
216 		err = skcipher_walk_done(&walk, err);  in crypto_cfb_decrypt()
219 	if (walk.nbytes) {  in crypto_cfb_decrypt()
220 		crypto_cfb_final(&walk, tfm);  in crypto_cfb_decrypt()
221 		err = skcipher_walk_done(&walk, 0);  in crypto_cfb_decrypt()