+void virtio_crypto_akcipher_algs_unregister(struct virtio_crypto
+*vcrypto) {
+ int i = 0;
+
+ mutex_lock(&algs_lock);
+
+ for (i = 0; i < ARRAY_SIZE(virtio_crypto_akcipher_algs); i++) {
+ uint32_t service = virtio_crypto_akcipher_algs[i].service;
+ uint32_t algonum = virtio_crypto_akcipher_algs[i].algonum;
+
+ if (virtio_crypto_akcipher_algs[i].active_devs == 0 ||
+ !virtcrypto_algo_is_supported(vcrypto, service, algonum))
+ continue;
+
+ if (virtio_crypto_akcipher_algs[i].active_devs == 1)
+
crypto_unregister_akcipher(&virtio_crypto_akcipher_algs[i].algo);
+
+ virtio_crypto_akcipher_algs[i].active_devs--;
+ }
+
+ mutex_unlock(&algs_lock);
+}
Why don't you reuse the virtio_crypto_algs_register/unregister functions?
The current code is too repetitive. Maybe we don't need create the new file virtio_crypto_akcipher_algo.c
because we had virtio_crypto_algs.c which includes all algorithms.
Yes, this looks similar to virtio_crypto_algs_register/unregister.
Let's look at the difference:
struct virtio_crypto_akcipher_algo {
uint32_t algonum;
uint32_t service;
unsigned int active_devs;
struct akcipher_alg algo;
};
struct virtio_crypto_algo {
uint32_t algonum;
uint32_t service;
unsigned int active_devs;
struct skcipher_alg algo; /* akcipher_alg VS skcipher_alg */
};
If reusing virtio_crypto_algs_register/unregister, we need to modify the
data structure like this:
struct virtio_crypto_akcipher_algo {
uint32_t algonum;
uint32_t service; /* use service to distinguish
akcipher/skcipher */
unsigned int active_devs;
union {
struct skcipher_alg skcipher;
struct akcipher_alg akcipher;
} alg;
};
int virtio_crypto_akcipher_algs_register(struct virtio_crypto *vcrypto)
{
...
for (i = 0; i < ARRAY_SIZE(virtio_crypto_akcipher_algs); i++) {
uint32_t service = virtio_crypto_akcipher_algs[i].service;
...
/* test service type then call
crypto_register_akcipher/crypto_register_skcipher */
if (service == VIRTIO_CRYPTO_SERVICE_AKCIPHER)
crypto_register_akcipher(&virtio_crypto_akcipher_algs[i].algo.akcipher);
else
crypto_register_skcipher(&virtio_crypto_skcipher_algs[i].algo.skcipher);
...
}
...
}
Also test service type and call
crypto_unregister_skcipher/crypto_unregister_akcipher.
This gets unclear from current v2 version.
On the other hand, the kernel side prefers to separate skcipher and
akcipher(separated header files and implementations).
--
zhenwei pi
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