16 static int crypto_cbc_encrypt_segment(struct skcipher_walk *walk,  in crypto_cbc_encrypt_segment()  argument
21 	unsigned int nbytes = walk->nbytes;  in crypto_cbc_encrypt_segment()
22 	u8 *src = walk->src.virt.addr;  in crypto_cbc_encrypt_segment()
23 	u8 *dst = walk->dst.virt.addr;  in crypto_cbc_encrypt_segment()
26 	u8 *iv = walk->iv;  in crypto_cbc_encrypt_segment()
44 static int crypto_cbc_encrypt_inplace(struct skcipher_walk *walk,  in crypto_cbc_encrypt_inplace()  argument
49 	unsigned int nbytes = walk->nbytes;  in crypto_cbc_encrypt_inplace()
50 	u8 *src = walk->src.virt.addr;  in crypto_cbc_encrypt_inplace()
53 	u8 *iv = walk->iv;  in crypto_cbc_encrypt_inplace()
67 	memcpy(walk->iv, iv, bsize);  in crypto_cbc_encrypt_inplace()
75 	struct skcipher_walk walk;  in crypto_cbc_encrypt()  local
78 	err = skcipher_walk_virt(&walk, req, false);  in crypto_cbc_encrypt()
80 	while (walk.nbytes) {  in crypto_cbc_encrypt()
81 		if (walk.src.virt.addr == walk.dst.virt.addr)  in crypto_cbc_encrypt()
82 			err = crypto_cbc_encrypt_inplace(&walk, skcipher);  in crypto_cbc_encrypt()
84 			err = crypto_cbc_encrypt_segment(&walk, skcipher);  in crypto_cbc_encrypt()
85 		err = skcipher_walk_done(&walk, err);  in crypto_cbc_encrypt()
91 static int crypto_cbc_decrypt_segment(struct skcipher_walk *walk,  in crypto_cbc_decrypt_segment()  argument
96 	unsigned int nbytes = walk->nbytes;  in crypto_cbc_decrypt_segment()
97 	u8 *src = walk->src.virt.addr;  in crypto_cbc_decrypt_segment()
98 	u8 *dst = walk->dst.virt.addr;  in crypto_cbc_decrypt_segment()
101 	u8 *iv = walk->iv;  in crypto_cbc_decrypt_segment()
116 	memcpy(walk->iv, iv, bsize);  in crypto_cbc_decrypt_segment()
121 static int crypto_cbc_decrypt_inplace(struct skcipher_walk *walk,  in crypto_cbc_decrypt_inplace()  argument
126 	unsigned int nbytes = walk->nbytes;  in crypto_cbc_decrypt_inplace()
127 	u8 *src = walk->src.virt.addr;  in crypto_cbc_decrypt_inplace()
148 	crypto_xor(src, walk->iv, bsize);  in crypto_cbc_decrypt_inplace()
149 	memcpy(walk->iv, last_iv, bsize);  in crypto_cbc_decrypt_inplace()
157 	struct skcipher_walk walk;  in crypto_cbc_decrypt()  local
160 	err = skcipher_walk_virt(&walk, req, false);  in crypto_cbc_decrypt()
162 	while (walk.nbytes) {  in crypto_cbc_decrypt()
163 		if (walk.src.virt.addr == walk.dst.virt.addr)  in crypto_cbc_decrypt()
164 			err = crypto_cbc_decrypt_inplace(&walk, skcipher);  in crypto_cbc_decrypt()
166 			err = crypto_cbc_decrypt_segment(&walk, skcipher);  in crypto_cbc_decrypt()
167 		err = skcipher_walk_done(&walk, err);  in crypto_cbc_decrypt()