42 static void crypto_cfb_final(struct skcipher_walk *walk,  in crypto_cfb_final()  argument
48 	u8 *src = walk->src.virt.addr;  in crypto_cfb_final()
49 	u8 *dst = walk->dst.virt.addr;  in crypto_cfb_final()
50 	u8 *iv = walk->iv;  in crypto_cfb_final()
51 	unsigned int nbytes = walk->nbytes;  in crypto_cfb_final()
57 static int crypto_cfb_encrypt_segment(struct skcipher_walk *walk,  in crypto_cfb_encrypt_segment()  argument
61 	unsigned int nbytes = walk->nbytes;  in crypto_cfb_encrypt_segment()
62 	u8 *src = walk->src.virt.addr;  in crypto_cfb_encrypt_segment()
63 	u8 *dst = walk->dst.virt.addr;  in crypto_cfb_encrypt_segment()
64 	u8 *iv = walk->iv;  in crypto_cfb_encrypt_segment()
75 	memcpy(walk->iv, iv, bsize);  in crypto_cfb_encrypt_segment()
80 static int crypto_cfb_encrypt_inplace(struct skcipher_walk *walk,  in crypto_cfb_encrypt_inplace()  argument
84 	unsigned int nbytes = walk->nbytes;  in crypto_cfb_encrypt_inplace()
85 	u8 *src = walk->src.virt.addr;  in crypto_cfb_encrypt_inplace()
86 	u8 *iv = walk->iv;  in crypto_cfb_encrypt_inplace()
97 	memcpy(walk->iv, iv, bsize);  in crypto_cfb_encrypt_inplace()
105 	struct skcipher_walk walk;  in crypto_cfb_encrypt()  local
109 	err = skcipher_walk_virt(&walk, req, false);  in crypto_cfb_encrypt()
111 	while (walk.nbytes >= bsize) {  in crypto_cfb_encrypt()
112 		if (walk.src.virt.addr == walk.dst.virt.addr)  in crypto_cfb_encrypt()
113 			err = crypto_cfb_encrypt_inplace(&walk, tfm);  in crypto_cfb_encrypt()
115 			err = crypto_cfb_encrypt_segment(&walk, tfm);  in crypto_cfb_encrypt()
116 		err = skcipher_walk_done(&walk, err);  in crypto_cfb_encrypt()
119 	if (walk.nbytes) {  in crypto_cfb_encrypt()
120 		crypto_cfb_final(&walk, tfm);  in crypto_cfb_encrypt()
121 		err = skcipher_walk_done(&walk, 0);  in crypto_cfb_encrypt()
127 static int crypto_cfb_decrypt_segment(struct skcipher_walk *walk,  in crypto_cfb_decrypt_segment()  argument
131 	unsigned int nbytes = walk->nbytes;  in crypto_cfb_decrypt_segment()
132 	u8 *src = walk->src.virt.addr;  in crypto_cfb_decrypt_segment()
133 	u8 *dst = walk->dst.virt.addr;  in crypto_cfb_decrypt_segment()
134 	u8 *iv = walk->iv;  in crypto_cfb_decrypt_segment()
145 	memcpy(walk->iv, iv, bsize);  in crypto_cfb_decrypt_segment()
150 static int crypto_cfb_decrypt_inplace(struct skcipher_walk *walk,  in crypto_cfb_decrypt_inplace()  argument
154 	unsigned int nbytes = walk->nbytes;  in crypto_cfb_decrypt_inplace()
155 	u8 *src = walk->src.virt.addr;  in crypto_cfb_decrypt_inplace()
156 	u8 * const iv = walk->iv;  in crypto_cfb_decrypt_inplace()
169 static int crypto_cfb_decrypt_blocks(struct skcipher_walk *walk,  in crypto_cfb_decrypt_blocks()  argument
172 	if (walk->src.virt.addr == walk->dst.virt.addr)  in crypto_cfb_decrypt_blocks()
173 		return crypto_cfb_decrypt_inplace(walk, tfm);  in crypto_cfb_decrypt_blocks()
175 		return crypto_cfb_decrypt_segment(walk, tfm);  in crypto_cfb_decrypt_blocks()
181 	struct skcipher_walk walk;  in crypto_cfb_decrypt()  local
185 	err = skcipher_walk_virt(&walk, req, false);  in crypto_cfb_decrypt()
187 	while (walk.nbytes >= bsize) {  in crypto_cfb_decrypt()
188 		err = crypto_cfb_decrypt_blocks(&walk, tfm);  in crypto_cfb_decrypt()
189 		err = skcipher_walk_done(&walk, err);  in crypto_cfb_decrypt()
192 	if (walk.nbytes) {  in crypto_cfb_decrypt()
193 		crypto_cfb_final(&walk, tfm);  in crypto_cfb_decrypt()
194 		err = skcipher_walk_done(&walk, 0);  in crypto_cfb_decrypt()