static void
virtio_crypto_sym_input_data_helper(VirtIODevice *vdev,
VirtIOCryptoReq *req,
uint32_t status,
CryptoDevBackendSymOpInfo *sym_op_info)
{
size_t s, len;
if (status != VIRTIO_CRYPTO_OK) {
return;
}
len = sym_op_info->src_len;
/* Save the cipher result */
s = iov_from_buf(req->in_iov, req->in_num, 0, sym_op_info->dst, len);
if (s != len) {
virtio_error(vdev, "virtio-crypto dest data incorrect");
return;
}
iov_discard_front(&req->in_iov, &req->in_num, len);
if (sym_op_info->op_type ==
VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) {
/* Save the digest result */
s = iov_from_buf(req->in_iov, req->in_num, 0,
sym_op_info->digest_result,
sym_op_info->digest_result_len);
if (s != sym_op_info->digest_result_len) {
virtio_error(vdev, "virtio-crypto digest result incorrect");
}
}
}
static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
{
V9fsVirtioState *v = (V9fsVirtioState *)vdev;
V9fsState *s = &v->state;
V9fsPDU *pdu;
ssize_t len;
VirtQueueElement *elem;
while ((pdu = pdu_alloc(s))) {
struct {
uint32_t size_le;
uint8_t id;
uint16_t tag_le;
} QEMU_PACKED out;
elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
if (!elem) {
goto out_free_pdu;
}
if (elem->in_num == 0) {
virtio_error(vdev,
"The guest sent a VirtFS request without space for "
"the reply");
goto out_free_req;
}
QEMU_BUILD_BUG_ON(sizeof(out) != 7);
v->elems[pdu->idx] = elem;
len = iov_to_buf(elem->out_sg, elem->out_num, 0,
&out, sizeof(out));
if (len != sizeof(out)) {
virtio_error(vdev, "The guest sent a malformed VirtFS request: "
"header size is %zd, should be 7", len);
goto out_free_req;
}
pdu->size = le32_to_cpu(out.size_le);
pdu->id = out.id;
pdu->tag = le16_to_cpu(out.tag_le);
qemu_co_queue_init(&pdu->complete);
pdu_submit(pdu);
}
return;
out_free_req:
virtqueue_detach_element(vq, elem, 0);
g_free(elem);
out_free_pdu:
pdu_free(pdu);
}
static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
{
V9fsVirtioState *v = (V9fsVirtioState *)vdev;
V9fsState *s = &v->state;
V9fsPDU *pdu;
ssize_t len;
VirtQueueElement *elem;
while ((pdu = pdu_alloc(s))) {
P9MsgHeader out;
elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
if (!elem) {
goto out_free_pdu;
}
if (elem->in_num == 0) {
virtio_error(vdev,
"The guest sent a VirtFS request without space for "
"the reply");
goto out_free_req;
}
QEMU_BUILD_BUG_ON(sizeof(out) != 7);
v->elems[pdu->idx] = elem;
len = iov_to_buf(elem->out_sg, elem->out_num, 0,
&out, sizeof(out));
if (len != sizeof(out)) {
virtio_error(vdev, "The guest sent a malformed VirtFS request: "
"header size is %zd, should be 7", len);
goto out_free_req;
}
pdu_submit(pdu, &out);
}
return;
out_free_req:
virtqueue_detach_element(vq, elem, 0);
g_free(elem);
out_free_pdu:
pdu_free(pdu);
}
static bool get_free_page_hints(VirtIOBalloon *dev)
{
VirtQueueElement *elem;
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtQueue *vq = dev->free_page_vq;
bool ret = true;
while (dev->block_iothread) {
qemu_cond_wait(&dev->free_page_cond, &dev->free_page_lock);
}
elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
if (!elem) {
return false;
}
if (elem->out_num) {
uint32_t id;
size_t size = iov_to_buf(elem->out_sg, elem->out_num, 0,
&id, sizeof(id));
virtio_tswap32s(vdev, &id);
if (unlikely(size != sizeof(id))) {
virtio_error(vdev, "received an incorrect cmd id");
ret = false;
goto out;
}
if (id == dev->free_page_report_cmd_id) {
dev->free_page_report_status = FREE_PAGE_REPORT_S_START;
} else {
/*
* Stop the optimization only when it has started. This
* avoids a stale stop sign for the previous command.
*/
if (dev->free_page_report_status == FREE_PAGE_REPORT_S_START) {
dev->free_page_report_status = FREE_PAGE_REPORT_S_STOP;
}
}
}
if (elem->in_num) {
if (dev->free_page_report_status == FREE_PAGE_REPORT_S_START) {
qemu_guest_free_page_hint(elem->in_sg[0].iov_base,
elem->in_sg[0].iov_len);
}
}
out:
virtqueue_push(vq, elem, 1);
g_free(elem);
return ret;
}
static void virtio_balloon_device_realize(DeviceState *dev, Error **errp)
{
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtIOBalloon *s = VIRTIO_BALLOON(dev);
int ret;
virtio_init(vdev, "virtio-balloon", VIRTIO_ID_BALLOON,
sizeof(struct virtio_balloon_config));
ret = qemu_add_balloon_handler(virtio_balloon_to_target,
virtio_balloon_stat, s);
if (ret < 0) {
error_setg(errp, "Only one balloon device is supported");
virtio_cleanup(vdev);
return;
}
s->ivq = virtio_add_queue(vdev, 128, virtio_balloon_handle_output);
s->dvq = virtio_add_queue(vdev, 128, virtio_balloon_handle_output);
s->svq = virtio_add_queue(vdev, 128, virtio_balloon_receive_stats);
if (virtio_has_feature(s->host_features,
VIRTIO_BALLOON_F_FREE_PAGE_HINT)) {
s->free_page_vq = virtio_add_queue(vdev, VIRTQUEUE_MAX_SIZE,
virtio_balloon_handle_free_page_vq);
s->free_page_report_status = FREE_PAGE_REPORT_S_STOP;
s->free_page_report_cmd_id =
VIRTIO_BALLOON_FREE_PAGE_REPORT_CMD_ID_MIN;
s->free_page_report_notify.notify =
virtio_balloon_free_page_report_notify;
precopy_add_notifier(&s->free_page_report_notify);
if (s->iothread) {
object_ref(OBJECT(s->iothread));
s->free_page_bh = aio_bh_new(iothread_get_aio_context(s->iothread),
virtio_ballloon_get_free_page_hints, s);
qemu_mutex_init(&s->free_page_lock);
qemu_cond_init(&s->free_page_cond);
s->block_iothread = false;
} else {
/* Simply disable this feature if the iothread wasn't created. */
s->host_features &= ~(1 << VIRTIO_BALLOON_F_FREE_PAGE_HINT);
virtio_error(vdev, "iothread is missing");
}
}
reset_stats(s);
}
static int
virtio_balloon_free_page_report_notify(NotifierWithReturn *n, void *data)
{
VirtIOBalloon *dev = container_of(n, VirtIOBalloon,
free_page_report_notify);
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
PrecopyNotifyData *pnd = data;
if (!virtio_balloon_free_page_support(dev)) {
/*
* This is an optimization provided to migration, so just return 0 to
* have the normal migration process not affected when this feature is
* not supported.
*/
return 0;
}
switch (pnd->reason) {
case PRECOPY_NOTIFY_SETUP:
precopy_enable_free_page_optimization();
break;
case PRECOPY_NOTIFY_COMPLETE:
case PRECOPY_NOTIFY_CLEANUP:
case PRECOPY_NOTIFY_BEFORE_BITMAP_SYNC:
virtio_balloon_free_page_stop(dev);
break;
case PRECOPY_NOTIFY_AFTER_BITMAP_SYNC:
if (vdev->vm_running) {
virtio_balloon_free_page_start(dev);
} else {
virtio_balloon_free_page_done(dev);
}
break;
default:
virtio_error(vdev, "%s: %d reason unknown", __func__, pnd->reason);
}
return 0;
}
static int
virtio_crypto_cipher_session_helper(VirtIODevice *vdev,
CryptoDevBackendSymSessionInfo *info,
struct virtio_crypto_cipher_session_para *cipher_para,
struct iovec **iov, unsigned int *out_num)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
unsigned int num = *out_num;
info->cipher_alg = ldl_le_p(&cipher_para->algo);
info->key_len = ldl_le_p(&cipher_para->keylen);
info->direction = ldl_le_p(&cipher_para->op);
DPRINTF("cipher_alg=%" PRIu32 ", info->direction=%" PRIu32 "\n",
info->cipher_alg, info->direction);
if (info->key_len > vcrypto->conf.max_cipher_key_len) {
error_report("virtio-crypto length of cipher key is too big: %u",
info->key_len);
return -VIRTIO_CRYPTO_ERR;
}
/* Get cipher key */
if (info->key_len > 0) {
size_t s;
DPRINTF("keylen=%" PRIu32 "\n", info->key_len);
info->cipher_key = g_malloc(info->key_len);
s = iov_to_buf(*iov, num, 0, info->cipher_key, info->key_len);
if (unlikely(s != info->key_len)) {
virtio_error(vdev, "virtio-crypto cipher key incorrect");
return -EFAULT;
}
iov_discard_front(iov, &num, info->key_len);
*out_num = num;
}
return 0;
}
static int64_t
virtio_crypto_create_sym_session(VirtIOCrypto *vcrypto,
struct virtio_crypto_sym_create_session_req *sess_req,
uint32_t queue_id,
uint32_t opcode,
struct iovec *iov, unsigned int out_num)
{
VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
CryptoDevBackendSymSessionInfo info;
int64_t session_id;
int queue_index;
uint32_t op_type;
Error *local_err = NULL;
int ret;
memset(&info, 0, sizeof(info));
op_type = ldl_le_p(&sess_req->op_type);
info.op_type = op_type;
info.op_code = opcode;
if (op_type == VIRTIO_CRYPTO_SYM_OP_CIPHER) {
ret = virtio_crypto_cipher_session_helper(vdev, &info,
&sess_req->u.cipher.para,
&iov, &out_num);
if (ret < 0) {
goto err;
}
} else if (op_type == VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) {
size_t s;
/* cipher part */
ret = virtio_crypto_cipher_session_helper(vdev, &info,
&sess_req->u.chain.para.cipher_param,
&iov, &out_num);
if (ret < 0) {
goto err;
}
/* hash part */
info.alg_chain_order = ldl_le_p(
&sess_req->u.chain.para.alg_chain_order);
info.add_len = ldl_le_p(&sess_req->u.chain.para.aad_len);
info.hash_mode = ldl_le_p(&sess_req->u.chain.para.hash_mode);
if (info.hash_mode == VIRTIO_CRYPTO_SYM_HASH_MODE_AUTH) {
info.hash_alg = ldl_le_p(&sess_req->u.chain.para.u.mac_param.algo);
info.auth_key_len = ldl_le_p(
&sess_req->u.chain.para.u.mac_param.auth_key_len);
info.hash_result_len = ldl_le_p(
&sess_req->u.chain.para.u.mac_param.hash_result_len);
if (info.auth_key_len > vcrypto->conf.max_auth_key_len) {
error_report("virtio-crypto length of auth key is too big: %u",
info.auth_key_len);
ret = -VIRTIO_CRYPTO_ERR;
goto err;
}
/* get auth key */
if (info.auth_key_len > 0) {
DPRINTF("auth_keylen=%" PRIu32 "\n", info.auth_key_len);
info.auth_key = g_malloc(info.auth_key_len);
s = iov_to_buf(iov, out_num, 0, info.auth_key,
info.auth_key_len);
if (unlikely(s != info.auth_key_len)) {
virtio_error(vdev,
"virtio-crypto authenticated key incorrect");
ret = -EFAULT;
goto err;
}
iov_discard_front(&iov, &out_num, info.auth_key_len);
}
} else if (info.hash_mode == VIRTIO_CRYPTO_SYM_HASH_MODE_PLAIN) {
info.hash_alg = ldl_le_p(
&sess_req->u.chain.para.u.hash_param.algo);
info.hash_result_len = ldl_le_p(
&sess_req->u.chain.para.u.hash_param.hash_result_len);
} else {
/* VIRTIO_CRYPTO_SYM_HASH_MODE_NESTED */
error_report("unsupported hash mode");
ret = -VIRTIO_CRYPTO_NOTSUPP;
goto err;
}
} else {
/* VIRTIO_CRYPTO_SYM_OP_NONE */
error_report("unsupported cipher op_type: VIRTIO_CRYPTO_SYM_OP_NONE");
ret = -VIRTIO_CRYPTO_NOTSUPP;
goto err;
}
queue_index = virtio_crypto_vq2q(queue_id);
session_id = cryptodev_backend_sym_create_session(
vcrypto->cryptodev,
&info, queue_index, &local_err);
if (session_id >= 0) {
DPRINTF("create session_id=%" PRIu64 " successfully\n",
session_id);
ret = session_id;
} else {
if (local_err) {
error_report_err(local_err);
}
ret = -VIRTIO_CRYPTO_ERR;
}
err:
g_free(info.cipher_key);
g_free(info.auth_key);
return ret;
}
static int
virtio_crypto_handle_request(VirtIOCryptoReq *request)
{
VirtIOCrypto *vcrypto = request->vcrypto;
VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
VirtQueueElement *elem = &request->elem;
int queue_index = virtio_crypto_vq2q(virtio_get_queue_index(request->vq));
struct virtio_crypto_op_data_req req;
int ret;
struct iovec *in_iov;
struct iovec *out_iov;
unsigned in_num;
unsigned out_num;
uint32_t opcode;
uint8_t status = VIRTIO_CRYPTO_ERR;
uint64_t session_id;
CryptoDevBackendSymOpInfo *sym_op_info = NULL;
Error *local_err = NULL;
if (elem->out_num < 1 || elem->in_num < 1) {
virtio_error(vdev, "virtio-crypto dataq missing headers");
return -1;
}
out_num = elem->out_num;
out_iov = elem->out_sg;
in_num = elem->in_num;
in_iov = elem->in_sg;
if (unlikely(iov_to_buf(out_iov, out_num, 0, &req, sizeof(req))
!= sizeof(req))) {
virtio_error(vdev, "virtio-crypto request outhdr too short");
return -1;
}
iov_discard_front(&out_iov, &out_num, sizeof(req));
if (in_iov[in_num - 1].iov_len <
sizeof(struct virtio_crypto_inhdr)) {
virtio_error(vdev, "virtio-crypto request inhdr too short");
return -1;
}
/* We always touch the last byte, so just see how big in_iov is. */
request->in_len = iov_size(in_iov, in_num);
request->in = (void *)in_iov[in_num - 1].iov_base
+ in_iov[in_num - 1].iov_len
- sizeof(struct virtio_crypto_inhdr);
iov_discard_back(in_iov, &in_num, sizeof(struct virtio_crypto_inhdr));
/*
* The length of operation result, including dest_data
* and digest_result if exists.
*/
request->in_num = in_num;
request->in_iov = in_iov;
opcode = ldl_le_p(&req.header.opcode);
session_id = ldq_le_p(&req.header.session_id);
switch (opcode) {
case VIRTIO_CRYPTO_CIPHER_ENCRYPT:
case VIRTIO_CRYPTO_CIPHER_DECRYPT:
ret = virtio_crypto_handle_sym_req(vcrypto,
&req.u.sym_req,
&sym_op_info,
out_iov, out_num);
/* Serious errors, need to reset virtio crypto device */
if (ret == -EFAULT) {
return -1;
} else if (ret == -VIRTIO_CRYPTO_NOTSUPP) {
virtio_crypto_req_complete(request, VIRTIO_CRYPTO_NOTSUPP);
virtio_crypto_free_request(request);
} else {
sym_op_info->session_id = session_id;
/* Set request's parameter */
request->flags = CRYPTODEV_BACKEND_ALG_SYM;
request->u.sym_op_info = sym_op_info;
ret = cryptodev_backend_crypto_operation(vcrypto->cryptodev,
request, queue_index, &local_err);
if (ret < 0) {
status = -ret;
if (local_err) {
error_report_err(local_err);
}
} else { /* ret == VIRTIO_CRYPTO_OK */
status = ret;
}
virtio_crypto_req_complete(request, status);
virtio_crypto_free_request(request);
}
break;
case VIRTIO_CRYPTO_HASH:
case VIRTIO_CRYPTO_MAC:
case VIRTIO_CRYPTO_AEAD_ENCRYPT:
case VIRTIO_CRYPTO_AEAD_DECRYPT:
default:
error_report("virtio-crypto unsupported dataq opcode: %u",
opcode);
virtio_crypto_req_complete(request, VIRTIO_CRYPTO_NOTSUPP);
virtio_crypto_free_request(request);
}
return 0;
}
static CryptoDevBackendSymOpInfo *
virtio_crypto_sym_op_helper(VirtIODevice *vdev,
struct virtio_crypto_cipher_para *cipher_para,
struct virtio_crypto_alg_chain_data_para *alg_chain_para,
struct iovec *iov, unsigned int out_num)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
CryptoDevBackendSymOpInfo *op_info;
uint32_t src_len = 0, dst_len = 0;
uint32_t iv_len = 0;
uint32_t aad_len = 0, hash_result_len = 0;
uint32_t hash_start_src_offset = 0, len_to_hash = 0;
uint32_t cipher_start_src_offset = 0, len_to_cipher = 0;
uint64_t max_len, curr_size = 0;
size_t s;
/* Plain cipher */
if (cipher_para) {
iv_len = ldl_le_p(&cipher_para->iv_len);
src_len = ldl_le_p(&cipher_para->src_data_len);
dst_len = ldl_le_p(&cipher_para->dst_data_len);
} else if (alg_chain_para) { /* Algorithm chain */
iv_len = ldl_le_p(&alg_chain_para->iv_len);
src_len = ldl_le_p(&alg_chain_para->src_data_len);
dst_len = ldl_le_p(&alg_chain_para->dst_data_len);
aad_len = ldl_le_p(&alg_chain_para->aad_len);
hash_result_len = ldl_le_p(&alg_chain_para->hash_result_len);
hash_start_src_offset = ldl_le_p(
&alg_chain_para->hash_start_src_offset);
cipher_start_src_offset = ldl_le_p(
&alg_chain_para->cipher_start_src_offset);
len_to_cipher = ldl_le_p(&alg_chain_para->len_to_cipher);
len_to_hash = ldl_le_p(&alg_chain_para->len_to_hash);
} else {
return NULL;
}
max_len = (uint64_t)iv_len + aad_len + src_len + dst_len + hash_result_len;
if (unlikely(max_len > vcrypto->conf.max_size)) {
virtio_error(vdev, "virtio-crypto too big length");
return NULL;
}
op_info = g_malloc0(sizeof(CryptoDevBackendSymOpInfo) + max_len);
op_info->iv_len = iv_len;
op_info->src_len = src_len;
op_info->dst_len = dst_len;
op_info->aad_len = aad_len;
op_info->digest_result_len = hash_result_len;
op_info->hash_start_src_offset = hash_start_src_offset;
op_info->len_to_hash = len_to_hash;
op_info->cipher_start_src_offset = cipher_start_src_offset;
op_info->len_to_cipher = len_to_cipher;
/* Handle the initilization vector */
if (op_info->iv_len > 0) {
DPRINTF("iv_len=%" PRIu32 "\n", op_info->iv_len);
op_info->iv = op_info->data + curr_size;
s = iov_to_buf(iov, out_num, 0, op_info->iv, op_info->iv_len);
if (unlikely(s != op_info->iv_len)) {
virtio_error(vdev, "virtio-crypto iv incorrect");
goto err;
}
iov_discard_front(&iov, &out_num, op_info->iv_len);
curr_size += op_info->iv_len;
}
/* Handle additional authentication data if exists */
if (op_info->aad_len > 0) {
DPRINTF("aad_len=%" PRIu32 "\n", op_info->aad_len);
op_info->aad_data = op_info->data + curr_size;
s = iov_to_buf(iov, out_num, 0, op_info->aad_data, op_info->aad_len);
if (unlikely(s != op_info->aad_len)) {
virtio_error(vdev, "virtio-crypto additional auth data incorrect");
goto err;
}
iov_discard_front(&iov, &out_num, op_info->aad_len);
curr_size += op_info->aad_len;
}
/* Handle the source data */
if (op_info->src_len > 0) {
DPRINTF("src_len=%" PRIu32 "\n", op_info->src_len);
op_info->src = op_info->data + curr_size;
s = iov_to_buf(iov, out_num, 0, op_info->src, op_info->src_len);
if (unlikely(s != op_info->src_len)) {
virtio_error(vdev, "virtio-crypto source data incorrect");
goto err;
}
iov_discard_front(&iov, &out_num, op_info->src_len);
curr_size += op_info->src_len;
}
/* Handle the destination data */
op_info->dst = op_info->data + curr_size;
curr_size += op_info->dst_len;
DPRINTF("dst_len=%" PRIu32 "\n", op_info->dst_len);
/* Handle the hash digest result */
if (hash_result_len > 0) {
DPRINTF("hash_result_len=%" PRIu32 "\n", hash_result_len);
op_info->digest_result = op_info->data + curr_size;
}
return op_info;
err:
g_free(op_info);
return NULL;
}
static void virtio_crypto_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
struct virtio_crypto_op_ctrl_req ctrl;
VirtQueueElement *elem;
struct iovec *in_iov;
struct iovec *out_iov;
unsigned in_num;
unsigned out_num;
uint32_t queue_id;
uint32_t opcode;
struct virtio_crypto_session_input input;
int64_t session_id;
uint8_t status;
size_t s;
for (;;) {
elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
if (!elem) {
break;
}
if (elem->out_num < 1 || elem->in_num < 1) {
virtio_error(vdev, "virtio-crypto ctrl missing headers");
virtqueue_detach_element(vq, elem, 0);
g_free(elem);
break;
}
out_num = elem->out_num;
out_iov = elem->out_sg;
in_num = elem->in_num;
in_iov = elem->in_sg;
if (unlikely(iov_to_buf(out_iov, out_num, 0, &ctrl, sizeof(ctrl))
!= sizeof(ctrl))) {
virtio_error(vdev, "virtio-crypto request ctrl_hdr too short");
virtqueue_detach_element(vq, elem, 0);
g_free(elem);
break;
}
iov_discard_front(&out_iov, &out_num, sizeof(ctrl));
opcode = ldl_le_p(&ctrl.header.opcode);
queue_id = ldl_le_p(&ctrl.header.queue_id);
switch (opcode) {
case VIRTIO_CRYPTO_CIPHER_CREATE_SESSION:
memset(&input, 0, sizeof(input));
session_id = virtio_crypto_create_sym_session(vcrypto,
&ctrl.u.sym_create_session,
queue_id, opcode,
out_iov, out_num);
/* Serious errors, need to reset virtio crypto device */
if (session_id == -EFAULT) {
virtqueue_detach_element(vq, elem, 0);
break;
} else if (session_id == -VIRTIO_CRYPTO_NOTSUPP) {
stl_le_p(&input.status, VIRTIO_CRYPTO_NOTSUPP);
} else if (session_id == -VIRTIO_CRYPTO_ERR) {
stl_le_p(&input.status, VIRTIO_CRYPTO_ERR);
} else {
/* Set the session id */
stq_le_p(&input.session_id, session_id);
stl_le_p(&input.status, VIRTIO_CRYPTO_OK);
}
s = iov_from_buf(in_iov, in_num, 0, &input, sizeof(input));
if (unlikely(s != sizeof(input))) {
virtio_error(vdev, "virtio-crypto input incorrect");
virtqueue_detach_element(vq, elem, 0);
break;
}
virtqueue_push(vq, elem, sizeof(input));
virtio_notify(vdev, vq);
break;
case VIRTIO_CRYPTO_CIPHER_DESTROY_SESSION:
case VIRTIO_CRYPTO_HASH_DESTROY_SESSION:
case VIRTIO_CRYPTO_MAC_DESTROY_SESSION:
case VIRTIO_CRYPTO_AEAD_DESTROY_SESSION:
status = virtio_crypto_handle_close_session(vcrypto,
&ctrl.u.destroy_session, queue_id);
/* The status only occupy one byte, we can directly use it */
s = iov_from_buf(in_iov, in_num, 0, &status, sizeof(status));
if (unlikely(s != sizeof(status))) {
virtio_error(vdev, "virtio-crypto status incorrect");
virtqueue_detach_element(vq, elem, 0);
break;
}
virtqueue_push(vq, elem, sizeof(status));
virtio_notify(vdev, vq);
break;
case VIRTIO_CRYPTO_HASH_CREATE_SESSION:
case VIRTIO_CRYPTO_MAC_CREATE_SESSION:
case VIRTIO_CRYPTO_AEAD_CREATE_SESSION:
default:
error_report("virtio-crypto unsupported ctrl opcode: %d", opcode);
memset(&input, 0, sizeof(input));
stl_le_p(&input.status, VIRTIO_CRYPTO_NOTSUPP);
s = iov_from_buf(in_iov, in_num, 0, &input, sizeof(input));
if (unlikely(s != sizeof(input))) {
virtio_error(vdev, "virtio-crypto input incorrect");
virtqueue_detach_element(vq, elem, 0);
break;
}
virtqueue_push(vq, elem, sizeof(input));
virtio_notify(vdev, vq);
break;
} /* end switch case */
g_free(elem);
} /* end for loop */
}
