17 static int crypto_cbc_encrypt_segment(struct skcipher_walk *walk,  in crypto_cbc_encrypt_segment()  argument
22 	unsigned int nbytes = walk->nbytes;  in crypto_cbc_encrypt_segment()
23 	u8 *src = walk->src.virt.addr;  in crypto_cbc_encrypt_segment()
24 	u8 *dst = walk->dst.virt.addr;  in crypto_cbc_encrypt_segment()
27 	u8 *iv = walk->iv;  in crypto_cbc_encrypt_segment()
45 static int crypto_cbc_encrypt_inplace(struct skcipher_walk *walk,  in crypto_cbc_encrypt_inplace()  argument
50 	unsigned int nbytes = walk->nbytes;  in crypto_cbc_encrypt_inplace()
51 	u8 *src = walk->src.virt.addr;  in crypto_cbc_encrypt_inplace()
54 	u8 *iv = walk->iv;  in crypto_cbc_encrypt_inplace()
68 	memcpy(walk->iv, iv, bsize);  in crypto_cbc_encrypt_inplace()
76 	struct skcipher_walk walk;  in crypto_cbc_encrypt()  local
79 	err = skcipher_walk_virt(&walk, req, false);  in crypto_cbc_encrypt()
81 	while (walk.nbytes) {  in crypto_cbc_encrypt()
82 		if (walk.src.virt.addr == walk.dst.virt.addr)  in crypto_cbc_encrypt()
83 			err = crypto_cbc_encrypt_inplace(&walk, skcipher);  in crypto_cbc_encrypt()
85 			err = crypto_cbc_encrypt_segment(&walk, skcipher);  in crypto_cbc_encrypt()
86 		err = skcipher_walk_done(&walk, err);  in crypto_cbc_encrypt()
92 static int crypto_cbc_decrypt_segment(struct skcipher_walk *walk,  in crypto_cbc_decrypt_segment()  argument
97 	unsigned int nbytes = walk->nbytes;  in crypto_cbc_decrypt_segment()
98 	u8 *src = walk->src.virt.addr;  in crypto_cbc_decrypt_segment()
99 	u8 *dst = walk->dst.virt.addr;  in crypto_cbc_decrypt_segment()
102 	u8 *iv = walk->iv;  in crypto_cbc_decrypt_segment()
117 	memcpy(walk->iv, iv, bsize);  in crypto_cbc_decrypt_segment()
122 static int crypto_cbc_decrypt_inplace(struct skcipher_walk *walk,  in crypto_cbc_decrypt_inplace()  argument
127 	unsigned int nbytes = walk->nbytes;  in crypto_cbc_decrypt_inplace()
128 	u8 *src = walk->src.virt.addr;  in crypto_cbc_decrypt_inplace()
149 	crypto_xor(src, walk->iv, bsize);  in crypto_cbc_decrypt_inplace()
150 	memcpy(walk->iv, last_iv, bsize);  in crypto_cbc_decrypt_inplace()
158 	struct skcipher_walk walk;  in crypto_cbc_decrypt()  local
161 	err = skcipher_walk_virt(&walk, req, false);  in crypto_cbc_decrypt()
163 	while (walk.nbytes) {  in crypto_cbc_decrypt()
164 		if (walk.src.virt.addr == walk.dst.virt.addr)  in crypto_cbc_decrypt()
165 			err = crypto_cbc_decrypt_inplace(&walk, skcipher);  in crypto_cbc_decrypt()
167 			err = crypto_cbc_decrypt_segment(&walk, skcipher);  in crypto_cbc_decrypt()
168 		err = skcipher_walk_done(&walk, err);  in crypto_cbc_decrypt()