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virtio-heci: disconnect client when message buffer overflowed

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Firmware need to disconnect the client connection when host's message
overlow the receive buffer in firmware. We emulate this behavior in
backend service.

Signed-off-by: Liu Shuo <shuo.a.liu@intel.com>
Reviewed-by: Li Hao <hao.l.li@intel.com>
Reviewed-by: Wang Yu <yu1.wang@intel.com>
Reviewed-by: Zhao, Yakui <yakui.zhao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Liu Shuo 2018-04-03 10:33:33 +08:00 committed by Jack Ren
parent 33e84efef9
commit d9545abefb
1 changed files with 34 additions and 1 deletions
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35
devicemodel/hw/pci/virtio/virtio_heci.c
View File

@ -557,6 +557,38 @@ virtio_heci_hbm_response(struct virtio_heci *vheci,
virtio_heci_client_put(vheci, client);
}
/*
* This function is intend to send HBM disconnection command to guest.
* Although the default name is for virtual, using vclient here for
* better understanding.
*/
static void
virtio_heci_disconnect_vclient(struct virtio_heci *vheci,
struct virtio_heci_client *client)
{
struct heci_msg_hdr hdr = {0};
struct heci_hbm_client_disconnect_req disconnect_req = {{0} };
struct virtio_heci_client *hbm_client;
disconnect_req.hbm_cmd.cmd = HECI_HBM_CLIENT_DISCONNECT;
disconnect_req.me_addr = client->client_id;
disconnect_req.host_addr = client->client_addr;
hbm_client = virtio_heci_get_hbm_client(vheci);
if (!hbm_client) {
DPRINTF(("vheci: HBM client get fail!!\r\n"));
return;
}
populate_heci_hdr(hbm_client, &hdr,
sizeof(struct heci_hbm_client_disconnect_req), 1);
DPRINTF(("vheci: DM -> UOS disconnect client[%d]!\r\n",
client->client_id));
virtio_heci_hbm_response(vheci, &hdr,
&disconnect_req, sizeof(disconnect_req));
virtio_heci_client_put(vheci, hbm_client);
}
static void
virtio_heci_hbm_handler(struct virtio_heci *vheci, void *data)
{
@ -824,7 +856,8 @@ virtio_heci_proc_tx(struct virtio_heci *vheci, struct virtio_vq_info *vq)
DPRINTF(("vheci: TX: ME[%d]fd[%d] overflow "
"max_message_length in sendbuf!\n\r",
client->client_id, client->client_fd));
/* TODO: close the connection according to spec */
/* close the connection according to spec */
virtio_heci_disconnect_vclient(vheci, client);
goto out;
}
/* copy buffer from virtqueue to send_buf */