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()
86 	memcpy(walk->iv, iv, bsize);  in crypto_cfb_encrypt_segment()
91 static int crypto_cfb_encrypt_inplace(struct skcipher_walk *walk,  in crypto_cfb_encrypt_inplace()  argument
95 	unsigned int nbytes = walk->nbytes;  in crypto_cfb_encrypt_inplace()
96 	u8 *src = walk->src.virt.addr;  in crypto_cfb_encrypt_inplace()
97 	u8 *iv = walk->iv;  in crypto_cfb_encrypt_inplace()
108 	memcpy(walk->iv, iv, bsize);  in crypto_cfb_encrypt_inplace()
116 	struct skcipher_walk walk;  in crypto_cfb_encrypt()  local
120 	err = skcipher_walk_virt(&walk, req, false);  in crypto_cfb_encrypt()
122 	while (walk.nbytes >= bsize) {  in crypto_cfb_encrypt()
123 		if (walk.src.virt.addr == walk.dst.virt.addr)  in crypto_cfb_encrypt()
124 			err = crypto_cfb_encrypt_inplace(&walk, tfm);  in crypto_cfb_encrypt()
126 			err = crypto_cfb_encrypt_segment(&walk, tfm);  in crypto_cfb_encrypt()
127 		err = skcipher_walk_done(&walk, err);  in crypto_cfb_encrypt()
130 	if (walk.nbytes) {  in crypto_cfb_encrypt()
131 		crypto_cfb_final(&walk, tfm);  in crypto_cfb_encrypt()
132 		err = skcipher_walk_done(&walk, 0);  in crypto_cfb_encrypt()
138 static int crypto_cfb_decrypt_segment(struct skcipher_walk *walk,  in crypto_cfb_decrypt_segment()  argument
142 	unsigned int nbytes = walk->nbytes;  in crypto_cfb_decrypt_segment()
143 	u8 *src = walk->src.virt.addr;  in crypto_cfb_decrypt_segment()
144 	u8 *dst = walk->dst.virt.addr;  in crypto_cfb_decrypt_segment()
145 	u8 *iv = walk->iv;  in crypto_cfb_decrypt_segment()
156 	memcpy(walk->iv, iv, bsize);  in crypto_cfb_decrypt_segment()
161 static int crypto_cfb_decrypt_inplace(struct skcipher_walk *walk,  in crypto_cfb_decrypt_inplace()  argument
165 	unsigned int nbytes = walk->nbytes;  in crypto_cfb_decrypt_inplace()
166 	u8 *src = walk->src.virt.addr;  in crypto_cfb_decrypt_inplace()
167 	u8 * const iv = walk->iv;  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()